diff options
Diffstat (limited to 'vendor/github.com/hashicorp/go-sockaddr')
21 files changed, 5200 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/go-sockaddr/GNUmakefile b/vendor/github.com/hashicorp/go-sockaddr/GNUmakefile new file mode 100644 index 0000000..f3dfd24 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/GNUmakefile @@ -0,0 +1,65 @@ +TOOLS= golang.org/x/tools/cover +GOCOVER_TMPFILE?= $(GOCOVER_FILE).tmp +GOCOVER_FILE?= .cover.out +GOCOVERHTML?= coverage.html +FIND=`/usr/bin/which 2> /dev/null gfind find | /usr/bin/grep -v ^no | /usr/bin/head -n 1` +XARGS=`/usr/bin/which 2> /dev/null gxargs xargs | /usr/bin/grep -v ^no | /usr/bin/head -n 1` + +test:: $(GOCOVER_FILE) + @$(MAKE) -C cmd/sockaddr test + +cover:: coverage_report + +$(GOCOVER_FILE):: + @${FIND} . -type d ! -path '*cmd*' ! -path '*.git*' -print0 | ${XARGS} -0 -I % sh -ec "cd % && rm -f $(GOCOVER_TMPFILE) && go test -coverprofile=$(GOCOVER_TMPFILE)" + + @echo 'mode: set' > $(GOCOVER_FILE) + @${FIND} . -type f ! -path '*cmd*' ! -path '*.git*' -name "$(GOCOVER_TMPFILE)" -print0 | ${XARGS} -0 -n1 cat $(GOCOVER_TMPFILE) | grep -v '^mode: ' >> ${PWD}/$(GOCOVER_FILE) + +$(GOCOVERHTML): $(GOCOVER_FILE) + go tool cover -html=$(GOCOVER_FILE) -o $(GOCOVERHTML) + +coverage_report:: $(GOCOVER_FILE) + go tool cover -html=$(GOCOVER_FILE) + +audit_tools:: + @go get -u github.com/golang/lint/golint && echo "Installed golint:" + @go get -u github.com/fzipp/gocyclo && echo "Installed gocyclo:" + @go get -u github.com/remyoudompheng/go-misc/deadcode && echo "Installed deadcode:" + @go get -u github.com/client9/misspell/cmd/misspell && echo "Installed misspell:" + @go get -u github.com/gordonklaus/ineffassign && echo "Installed ineffassign:" + +audit:: + deadcode + go tool vet -all *.go + go tool vet -shadow=true *.go + golint *.go + ineffassign . + gocyclo -over 65 *.go + misspell *.go + +clean:: + rm -f $(GOCOVER_FILE) $(GOCOVERHTML) + +dev:: + @go build + @$(MAKE) -B -C cmd/sockaddr sockaddr + +install:: + @go install + @$(MAKE) -C cmd/sockaddr install + +doc:: + @echo Visit: http://127.0.0.1:6161/pkg/github.com/hashicorp/go-sockaddr/ + godoc -http=:6161 -goroot $GOROOT + +world:: + @set -e; \ + for os in solaris darwin freebsd linux windows; do \ + for arch in amd64; do \ + printf "Building on %s-%s\n" "$${os}" "$${arch}" ; \ + env GOOS="$${os}" GOARCH="$${arch}" go build -o /dev/null; \ + done; \ + done + + $(MAKE) -C cmd/sockaddr world diff --git a/vendor/github.com/hashicorp/go-sockaddr/LICENSE b/vendor/github.com/hashicorp/go-sockaddr/LICENSE new file mode 100644 index 0000000..a612ad9 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/LICENSE @@ -0,0 +1,373 @@ +Mozilla Public License Version 2.0 +================================== + +1. Definitions +-------------- + +1.1. "Contributor" + means each individual or legal entity that creates, contributes to + the creation of, or owns Covered Software. + +1.2. "Contributor Version" + means the combination of the Contributions of others (if any) used + by a Contributor and that particular Contributor's Contribution. + +1.3. "Contribution" + means Covered Software of a particular Contributor. + +1.4. "Covered Software" + means Source Code Form to which the initial Contributor has attached + the notice in Exhibit A, the Executable Form of such Source Code + Form, and Modifications of such Source Code Form, in each case + including portions thereof. + +1.5. "Incompatible With Secondary Licenses" + means + + (a) that the initial Contributor has attached the notice described + in Exhibit B to the Covered Software; or + + (b) that the Covered Software was made available under the terms of + version 1.1 or earlier of the License, but not also under the + terms of a Secondary License. + +1.6. "Executable Form" + means any form of the work other than Source Code Form. + +1.7. "Larger Work" + means a work that combines Covered Software with other material, in + a separate file or files, that is not Covered Software. + +1.8. "License" + means this document. + +1.9. "Licensable" + means having the right to grant, to the maximum extent possible, + whether at the time of the initial grant or subsequently, any and + all of the rights conveyed by this License. + +1.10. "Modifications" + means any of the following: + + (a) any file in Source Code Form that results from an addition to, + deletion from, or modification of the contents of Covered + Software; or + + (b) any new file in Source Code Form that contains any Covered + Software. + +1.11. "Patent Claims" of a Contributor + means any patent claim(s), including without limitation, method, + process, and apparatus claims, in any patent Licensable by such + Contributor that would be infringed, but for the grant of the + License, by the making, using, selling, offering for sale, having + made, import, or transfer of either its Contributions or its + Contributor Version. + +1.12. "Secondary License" + means either the GNU General Public License, Version 2.0, the GNU + Lesser General Public License, Version 2.1, the GNU Affero General + Public License, Version 3.0, or any later versions of those + licenses. + +1.13. "Source Code Form" + means the form of the work preferred for making modifications. + +1.14. "You" (or "Your") + means an individual or a legal entity exercising rights under this + License. For legal entities, "You" includes any entity that + controls, is controlled by, or is under common control with You. For + purposes of this definition, "control" means (a) the power, direct + or indirect, to cause the direction or management of such entity, + whether by contract or otherwise, or (b) ownership of more than + fifty percent (50%) of the outstanding shares or beneficial + ownership of such entity. + +2. License Grants and Conditions +-------------------------------- + +2.1. Grants + +Each Contributor hereby grants You a world-wide, royalty-free, +non-exclusive license: + +(a) under intellectual property rights (other than patent or trademark) + Licensable by such Contributor to use, reproduce, make available, + modify, display, perform, distribute, and otherwise exploit its + Contributions, either on an unmodified basis, with Modifications, or + as part of a Larger Work; and + +(b) under Patent Claims of such Contributor to make, use, sell, offer + for sale, have made, import, and otherwise transfer either its + Contributions or its Contributor Version. + +2.2. Effective Date + +The licenses granted in Section 2.1 with respect to any Contribution +become effective for each Contribution on the date the Contributor first +distributes such Contribution. + +2.3. Limitations on Grant Scope + +The licenses granted in this Section 2 are the only rights granted under +this License. No additional rights or licenses will be implied from the +distribution or licensing of Covered Software under this License. +Notwithstanding Section 2.1(b) above, no patent license is granted by a +Contributor: + +(a) for any code that a Contributor has removed from Covered Software; + or + +(b) for infringements caused by: (i) Your and any other third party's + modifications of Covered Software, or (ii) the combination of its + Contributions with other software (except as part of its Contributor + Version); or + +(c) under Patent Claims infringed by Covered Software in the absence of + its Contributions. + +This License does not grant any rights in the trademarks, service marks, +or logos of any Contributor (except as may be necessary to comply with +the notice requirements in Section 3.4). + +2.4. Subsequent Licenses + +No Contributor makes additional grants as a result of Your choice to +distribute the Covered Software under a subsequent version of this +License (see Section 10.2) or under the terms of a Secondary License (if +permitted under the terms of Section 3.3). + +2.5. Representation + +Each Contributor represents that the Contributor believes its +Contributions are its original creation(s) or it has sufficient rights +to grant the rights to its Contributions conveyed by this License. + +2.6. Fair Use + +This License is not intended to limit any rights You have under +applicable copyright doctrines of fair use, fair dealing, or other +equivalents. + +2.7. Conditions + +Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted +in Section 2.1. + +3. Responsibilities +------------------- + +3.1. Distribution of Source Form + +All distribution of Covered Software in Source Code Form, including any +Modifications that You create or to which You contribute, must be under +the terms of this License. You must inform recipients that the Source +Code Form of the Covered Software is governed by the terms of this +License, and how they can obtain a copy of this License. You may not +attempt to alter or restrict the recipients' rights in the Source Code +Form. + +3.2. Distribution of Executable Form + +If You distribute Covered Software in Executable Form then: + +(a) such Covered Software must also be made available in Source Code + Form, as described in Section 3.1, and You must inform recipients of + the Executable Form how they can obtain a copy of such Source Code + Form by reasonable means in a timely manner, at a charge no more + than the cost of distribution to the recipient; and + +(b) You may distribute such Executable Form under the terms of this + License, or sublicense it under different terms, provided that the + license for the Executable Form does not attempt to limit or alter + the recipients' rights in the Source Code Form under this License. + +3.3. Distribution of a Larger Work + +You may create and distribute a Larger Work under terms of Your choice, +provided that You also comply with the requirements of this License for +the Covered Software. If the Larger Work is a combination of Covered +Software with a work governed by one or more Secondary Licenses, and the +Covered Software is not Incompatible With Secondary Licenses, this +License permits You to additionally distribute such Covered Software +under the terms of such Secondary License(s), so that the recipient of +the Larger Work may, at their option, further distribute the Covered +Software under the terms of either this License or such Secondary +License(s). + +3.4. Notices + +You may not remove or alter the substance of any license notices +(including copyright notices, patent notices, disclaimers of warranty, +or limitations of liability) contained within the Source Code Form of +the Covered Software, except that You may alter any license notices to +the extent required to remedy known factual inaccuracies. + +3.5. Application of Additional Terms + +You may choose to offer, and to charge a fee for, warranty, support, +indemnity or liability obligations to one or more recipients of Covered +Software. However, You may do so only on Your own behalf, and not on +behalf of any Contributor. You must make it absolutely clear that any +such warranty, support, indemnity, or liability obligation is offered by +You alone, and You hereby agree to indemnify every Contributor for any +liability incurred by such Contributor as a result of warranty, support, +indemnity or liability terms You offer. You may include additional +disclaimers of warranty and limitations of liability specific to any +jurisdiction. + +4. Inability to Comply Due to Statute or Regulation +--------------------------------------------------- + +If it is impossible for You to comply with any of the terms of this +License with respect to some or all of the Covered Software due to +statute, judicial order, or regulation then You must: (a) comply with +the terms of this License to the maximum extent possible; and (b) +describe the limitations and the code they affect. Such description must +be placed in a text file included with all distributions of the Covered +Software under this License. Except to the extent prohibited by statute +or regulation, such description must be sufficiently detailed for a +recipient of ordinary skill to be able to understand it. + +5. Termination +-------------- + +5.1. The rights granted under this License will terminate automatically +if You fail to comply with any of its terms. However, if You become +compliant, then the rights granted under this License from a particular +Contributor are reinstated (a) provisionally, unless and until such +Contributor explicitly and finally terminates Your grants, and (b) on an +ongoing basis, if such Contributor fails to notify You of the +non-compliance by some reasonable means prior to 60 days after You have +come back into compliance. Moreover, Your grants from a particular +Contributor are reinstated on an ongoing basis if such Contributor +notifies You of the non-compliance by some reasonable means, this is the +first time You have received notice of non-compliance with this License +from such Contributor, and You become compliant prior to 30 days after +Your receipt of the notice. + +5.2. If You initiate litigation against any entity by asserting a patent +infringement claim (excluding declaratory judgment actions, +counter-claims, and cross-claims) alleging that a Contributor Version +directly or indirectly infringes any patent, then the rights granted to +You by any and all Contributors for the Covered Software under Section +2.1 of this License shall terminate. + +5.3. In the event of termination under Sections 5.1 or 5.2 above, all +end user license agreements (excluding distributors and resellers) which +have been validly granted by You or Your distributors under this License +prior to termination shall survive termination. + +************************************************************************ +* * +* 6. Disclaimer of Warranty * +* ------------------------- * +* * +* Covered Software is provided under this License on an "as is" * +* basis, without warranty of any kind, either expressed, implied, or * +* statutory, including, without limitation, warranties that the * +* Covered Software is free of defects, merchantable, fit for a * +* particular purpose or non-infringing. The entire risk as to the * +* quality and performance of the Covered Software is with You. * +* Should any Covered Software prove defective in any respect, You * +* (not any Contributor) assume the cost of any necessary servicing, * +* repair, or correction. This disclaimer of warranty constitutes an * +* essential part of this License. No use of any Covered Software is * +* authorized under this License except under this disclaimer. * +* * +************************************************************************ + +************************************************************************ +* * +* 7. Limitation of Liability * +* -------------------------- * +* * +* Under no circumstances and under no legal theory, whether tort * +* (including negligence), contract, or otherwise, shall any * +* Contributor, or anyone who distributes Covered Software as * +* permitted above, be liable to You for any direct, indirect, * +* special, incidental, or consequential damages of any character * +* including, without limitation, damages for lost profits, loss of * +* goodwill, work stoppage, computer failure or malfunction, or any * +* and all other commercial damages or losses, even if such party * +* shall have been informed of the possibility of such damages. This * +* limitation of liability shall not apply to liability for death or * +* personal injury resulting from such party's negligence to the * +* extent applicable law prohibits such limitation. Some * +* jurisdictions do not allow the exclusion or limitation of * +* incidental or consequential damages, so this exclusion and * +* limitation may not apply to You. * +* * +************************************************************************ + +8. Litigation +------------- + +Any litigation relating to this License may be brought only in the +courts of a jurisdiction where the defendant maintains its principal +place of business and such litigation shall be governed by laws of that +jurisdiction, without reference to its conflict-of-law provisions. +Nothing in this Section shall prevent a party's ability to bring +cross-claims or counter-claims. + +9. Miscellaneous +---------------- + +This License represents the complete agreement concerning the subject +matter hereof. If any provision of this License is held to be +unenforceable, such provision shall be reformed only to the extent +necessary to make it enforceable. Any law or regulation which provides +that the language of a contract shall be construed against the drafter +shall not be used to construe this License against a Contributor. + +10. Versions of the License +--------------------------- + +10.1. New Versions + +Mozilla Foundation is the license steward. Except as provided in Section +10.3, no one other than the license steward has the right to modify or +publish new versions of this License. Each version will be given a +distinguishing version number. + +10.2. Effect of New Versions + +You may distribute the Covered Software under the terms of the version +of the License under which You originally received the Covered Software, +or under the terms of any subsequent version published by the license +steward. + +10.3. Modified Versions + +If you create software not governed by this License, and you want to +create a new license for such software, you may create and use a +modified version of this License if you rename the license and remove +any references to the name of the license steward (except to note that +such modified license differs from this License). + +10.4. Distributing Source Code Form that is Incompatible With Secondary +Licenses + +If You choose to distribute Source Code Form that is Incompatible With +Secondary Licenses under the terms of this version of the License, the +notice described in Exhibit B of this License must be attached. + +Exhibit A - Source Code Form License Notice +------------------------------------------- + + This Source Code Form is subject to the terms of the Mozilla Public + License, v. 2.0. If a copy of the MPL was not distributed with this + file, You can obtain one at http://mozilla.org/MPL/2.0/. + +If it is not possible or desirable to put the notice in a particular +file, then You may include the notice in a location (such as a LICENSE +file in a relevant directory) where a recipient would be likely to look +for such a notice. + +You may add additional accurate notices of copyright ownership. + +Exhibit B - "Incompatible With Secondary Licenses" Notice +--------------------------------------------------------- + + This Source Code Form is "Incompatible With Secondary Licenses", as + defined by the Mozilla Public License, v. 2.0. diff --git a/vendor/github.com/hashicorp/go-sockaddr/README.md b/vendor/github.com/hashicorp/go-sockaddr/README.md new file mode 100644 index 0000000..a2e170a --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/README.md @@ -0,0 +1,118 @@ +# go-sockaddr + +## `sockaddr` Library + +Socket address convenience functions for Go. `go-sockaddr` is a convenience +library that makes doing the right thing with IP addresses easy. `go-sockaddr` +is loosely modeled after the UNIX `sockaddr_t` and creates a union of the family +of `sockaddr_t` types (see below for an ascii diagram). Library documentation +is available +at +[https://godoc.org/github.com/hashicorp/go-sockaddr](https://godoc.org/github.com/hashicorp/go-sockaddr). +The primary intent of the library was to make it possible to define heuristics +for selecting the correct IP addresses when a configuration is evaluated at +runtime. See +the +[docs](https://godoc.org/github.com/hashicorp/go-sockaddr), +[`template` package](https://godoc.org/github.com/hashicorp/go-sockaddr/template), +tests, +and +[CLI utility](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr) +for details and hints as to how to use this library. + +For example, with this library it is possible to find an IP address that: + +* is attached to a default route + ([`GetDefaultInterfaces()`](https://godoc.org/github.com/hashicorp/go-sockaddr#GetDefaultInterfaces)) +* is contained within a CIDR block ([`IfByNetwork()`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByNetwork)) +* is an RFC1918 address + ([`IfByRFC("1918")`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByRFC)) +* is ordered + ([`OrderedIfAddrBy(args)`](https://godoc.org/github.com/hashicorp/go-sockaddr#OrderedIfAddrBy) where + `args` includes, but is not limited + to, + [`AscIfType`](https://godoc.org/github.com/hashicorp/go-sockaddr#AscIfType), + [`AscNetworkSize`](https://godoc.org/github.com/hashicorp/go-sockaddr#AscNetworkSize)) +* excludes all IPv6 addresses + ([`IfByType("^(IPv4)$")`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByType)) +* is larger than a `/32` + ([`IfByMaskSize(32)`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByMaskSize)) +* is not on a `down` interface + ([`ExcludeIfs("flags", "down")`](https://godoc.org/github.com/hashicorp/go-sockaddr#ExcludeIfs)) +* preferences an IPv6 address over an IPv4 address + ([`SortIfByType()`](https://godoc.org/github.com/hashicorp/go-sockaddr#SortIfByType) + + [`ReverseIfAddrs()`](https://godoc.org/github.com/hashicorp/go-sockaddr#ReverseIfAddrs)); and +* excludes any IP in RFC6890 address + ([`IfByRFC("6890")`](https://godoc.org/github.com/hashicorp/go-sockaddr#IfByRFC)) + +Or any combination or variation therein. + +There are also a few simple helper functions such as `GetPublicIP` and +`GetPrivateIP` which both return strings and select the first public or private +IP address on the default interface, respectively. Similarly, there is also a +helper function called `GetInterfaceIP` which returns the first usable IP +address on the named interface. + +## `sockaddr` CLI + +Given the possible complexity of the `sockaddr` library, there is a CLI utility +that accompanies the library, also +called +[`sockaddr`](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr). +The +[`sockaddr`](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr) +utility exposes nearly all of the functionality of the library and can be used +either as an administrative tool or testing tool. To install +the +[`sockaddr`](https://github.com/hashicorp/go-sockaddr/tree/master/cmd/sockaddr), +run: + +```text +$ go get -u github.com/hashicorp/go-sockaddr/cmd/sockaddr +``` + +If you're familiar with UNIX's `sockaddr` struct's, the following diagram +mapping the C `sockaddr` (top) to `go-sockaddr` structs (bottom) and +interfaces will be helpful: + +``` ++-------------------------------------------------------+ +| | +| sockaddr | +| SockAddr | +| | +| +--------------+ +----------------------------------+ | +| | sockaddr_un | | | | +| | SockAddrUnix | | sockaddr_in{,6} | | +| +--------------+ | IPAddr | | +| | | | +| | +-------------+ +--------------+ | | +| | | sockaddr_in | | sockaddr_in6 | | | +| | | IPv4Addr | | IPv6Addr | | | +| | +-------------+ +--------------+ | | +| | | | +| +----------------------------------+ | +| | ++-------------------------------------------------------+ +``` + +## Inspiration and Design + +There were many subtle inspirations that led to this design, but the most direct +inspiration for the filtering syntax was +OpenBSD's +[`pf.conf(5)`](https://www.freebsd.org/cgi/man.cgi?query=pf.conf&apropos=0&sektion=0&arch=default&format=html#PARAMETERS) firewall +syntax that lets you select the first IP address on a given named interface. +The original problem stemmed from: + +* needing to create immutable images using [Packer](https://www.packer.io) that + ran the [Consul](https://www.consul.io) process (Consul can only use one IP + address at a time); +* images that may or may not have multiple interfaces or IP addresses at + runtime; and +* we didn't want to rely on configuration management to render out the correct + IP address if the VM image was being used in an auto-scaling group. + +Instead we needed some way to codify a heuristic that would correctly select the +right IP address but the input parameters were not known when the image was +created. diff --git a/vendor/github.com/hashicorp/go-sockaddr/doc.go b/vendor/github.com/hashicorp/go-sockaddr/doc.go new file mode 100644 index 0000000..90671de --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/doc.go @@ -0,0 +1,5 @@ +/* +Package sockaddr is a Go implementation of the UNIX socket family data types and +related helper functions. +*/ +package sockaddr diff --git a/vendor/github.com/hashicorp/go-sockaddr/ifaddr.go b/vendor/github.com/hashicorp/go-sockaddr/ifaddr.go new file mode 100644 index 0000000..0811b27 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ifaddr.go @@ -0,0 +1,254 @@ +package sockaddr + +import "strings" + +// ifAddrAttrMap is a map of the IfAddr type-specific attributes. +var ifAddrAttrMap map[AttrName]func(IfAddr) string +var ifAddrAttrs []AttrName + +func init() { + ifAddrAttrInit() +} + +// GetPrivateIP returns a string with a single IP address that is part of RFC +// 6890 and has a default route. If the system can't determine its IP address +// or find an RFC 6890 IP address, an empty string will be returned instead. +// This function is the `eval` equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetPrivateInterfaces | attr "address"}}' +/// ``` +func GetPrivateIP() (string, error) { + privateIfs, err := GetPrivateInterfaces() + if err != nil { + return "", err + } + if len(privateIfs) < 1 { + return "", nil + } + + ifAddr := privateIfs[0] + ip := *ToIPAddr(ifAddr.SockAddr) + return ip.NetIP().String(), nil +} + +// GetPrivateIPs returns a string with all IP addresses that are part of RFC +// 6890 (regardless of whether or not there is a default route, unlike +// GetPublicIP). If the system can't find any RFC 6890 IP addresses, an empty +// string will be returned instead. This function is the `eval` equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetAllInterfaces | include "RFC" "6890" | join "address" " "}}' +/// ``` +func GetPrivateIPs() (string, error) { + ifAddrs, err := GetAllInterfaces() + if err != nil { + return "", err + } else if len(ifAddrs) < 1 { + return "", nil + } + + ifAddrs, _ = FilterIfByType(ifAddrs, TypeIP) + if len(ifAddrs) == 0 { + return "", nil + } + + OrderedIfAddrBy(AscIfType, AscIfNetworkSize).Sort(ifAddrs) + + ifAddrs, _, err = IfByRFC("6890", ifAddrs) + if err != nil { + return "", err + } else if len(ifAddrs) == 0 { + return "", nil + } + + _, ifAddrs, err = IfByRFC(ForwardingBlacklistRFC, ifAddrs) + if err != nil { + return "", err + } else if len(ifAddrs) == 0 { + return "", nil + } + + ips := make([]string, 0, len(ifAddrs)) + for _, ifAddr := range ifAddrs { + ip := *ToIPAddr(ifAddr.SockAddr) + s := ip.NetIP().String() + ips = append(ips, s) + } + + return strings.Join(ips, " "), nil +} + +// GetPublicIP returns a string with a single IP address that is NOT part of RFC +// 6890 and has a default route. If the system can't determine its IP address +// or find a non RFC 6890 IP address, an empty string will be returned instead. +// This function is the `eval` equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetPublicInterfaces | attr "address"}}' +/// ``` +func GetPublicIP() (string, error) { + publicIfs, err := GetPublicInterfaces() + if err != nil { + return "", err + } else if len(publicIfs) < 1 { + return "", nil + } + + ifAddr := publicIfs[0] + ip := *ToIPAddr(ifAddr.SockAddr) + return ip.NetIP().String(), nil +} + +// GetPublicIPs returns a string with all IP addresses that are NOT part of RFC +// 6890 (regardless of whether or not there is a default route, unlike +// GetPublicIP). If the system can't find any non RFC 6890 IP addresses, an +// empty string will be returned instead. This function is the `eval` +// equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetAllInterfaces | exclude "RFC" "6890" | join "address" " "}}' +/// ``` +func GetPublicIPs() (string, error) { + ifAddrs, err := GetAllInterfaces() + if err != nil { + return "", err + } else if len(ifAddrs) < 1 { + return "", nil + } + + ifAddrs, _ = FilterIfByType(ifAddrs, TypeIP) + if len(ifAddrs) == 0 { + return "", nil + } + + OrderedIfAddrBy(AscIfType, AscIfNetworkSize).Sort(ifAddrs) + + _, ifAddrs, err = IfByRFC("6890", ifAddrs) + if err != nil { + return "", err + } else if len(ifAddrs) == 0 { + return "", nil + } + + ips := make([]string, 0, len(ifAddrs)) + for _, ifAddr := range ifAddrs { + ip := *ToIPAddr(ifAddr.SockAddr) + s := ip.NetIP().String() + ips = append(ips, s) + } + + return strings.Join(ips, " "), nil +} + +// GetInterfaceIP returns a string with a single IP address sorted by the size +// of the network (i.e. IP addresses with a smaller netmask, larger network +// size, are sorted first). This function is the `eval` equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetAllInterfaces | include "name" <<ARG>> | sort "type,size" | include "flag" "forwardable" | attr "address" }}' +/// ``` +func GetInterfaceIP(namedIfRE string) (string, error) { + ifAddrs, err := GetAllInterfaces() + if err != nil { + return "", err + } + + ifAddrs, _, err = IfByName(namedIfRE, ifAddrs) + if err != nil { + return "", err + } + + ifAddrs, _, err = IfByFlag("forwardable", ifAddrs) + if err != nil { + return "", err + } + + ifAddrs, err = SortIfBy("+type,+size", ifAddrs) + if err != nil { + return "", err + } + + if len(ifAddrs) == 0 { + return "", err + } + + ip := ToIPAddr(ifAddrs[0].SockAddr) + if ip == nil { + return "", err + } + + return IPAddrAttr(*ip, "address"), nil +} + +// GetInterfaceIPs returns a string with all IPs, sorted by the size of the +// network (i.e. IP addresses with a smaller netmask, larger network size, are +// sorted first), on a named interface. This function is the `eval` equivalent +// of: +// +// ``` +// $ sockaddr eval -r '{{GetAllInterfaces | include "name" <<ARG>> | sort "type,size" | join "address" " "}}' +/// ``` +func GetInterfaceIPs(namedIfRE string) (string, error) { + ifAddrs, err := GetAllInterfaces() + if err != nil { + return "", err + } + + ifAddrs, _, err = IfByName(namedIfRE, ifAddrs) + if err != nil { + return "", err + } + + ifAddrs, err = SortIfBy("+type,+size", ifAddrs) + if err != nil { + return "", err + } + + if len(ifAddrs) == 0 { + return "", err + } + + ips := make([]string, 0, len(ifAddrs)) + for _, ifAddr := range ifAddrs { + ip := *ToIPAddr(ifAddr.SockAddr) + s := ip.NetIP().String() + ips = append(ips, s) + } + + return strings.Join(ips, " "), nil +} + +// IfAddrAttrs returns a list of attributes supported by the IfAddr type +func IfAddrAttrs() []AttrName { + return ifAddrAttrs +} + +// IfAddrAttr returns a string representation of an attribute for the given +// IfAddr. +func IfAddrAttr(ifAddr IfAddr, attrName AttrName) string { + fn, found := ifAddrAttrMap[attrName] + if !found { + return "" + } + + return fn(ifAddr) +} + +// ifAddrAttrInit is called once at init() +func ifAddrAttrInit() { + // Sorted for human readability + ifAddrAttrs = []AttrName{ + "flags", + "name", + } + + ifAddrAttrMap = map[AttrName]func(ifAddr IfAddr) string{ + "flags": func(ifAddr IfAddr) string { + return ifAddr.Interface.Flags.String() + }, + "name": func(ifAddr IfAddr) string { + return ifAddr.Interface.Name + }, + } +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/ifaddrs.go b/vendor/github.com/hashicorp/go-sockaddr/ifaddrs.go new file mode 100644 index 0000000..2a706c3 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ifaddrs.go @@ -0,0 +1,1281 @@ +package sockaddr + +import ( + "encoding/binary" + "errors" + "fmt" + "math/big" + "net" + "regexp" + "sort" + "strconv" + "strings" +) + +var ( + // Centralize all regexps and regexp.Copy() where necessary. + signRE *regexp.Regexp = regexp.MustCompile(`^[\s]*[+-]`) + whitespaceRE *regexp.Regexp = regexp.MustCompile(`[\s]+`) + ifNameRE *regexp.Regexp = regexp.MustCompile(`^(?:Ethernet|Wireless LAN) adapter ([^:]+):`) + ipAddrRE *regexp.Regexp = regexp.MustCompile(`^ IPv[46] Address\. \. \. \. \. \. \. \. \. \. \. : ([^\s]+)`) +) + +// IfAddrs is a slice of IfAddr +type IfAddrs []IfAddr + +func (ifs IfAddrs) Len() int { return len(ifs) } + +// CmpIfFunc is the function signature that must be met to be used in the +// OrderedIfAddrBy multiIfAddrSorter +type CmpIfAddrFunc func(p1, p2 *IfAddr) int + +// multiIfAddrSorter implements the Sort interface, sorting the IfAddrs within. +type multiIfAddrSorter struct { + ifAddrs IfAddrs + cmp []CmpIfAddrFunc +} + +// Sort sorts the argument slice according to the Cmp functions passed to +// OrderedIfAddrBy. +func (ms *multiIfAddrSorter) Sort(ifAddrs IfAddrs) { + ms.ifAddrs = ifAddrs + sort.Sort(ms) +} + +// OrderedIfAddrBy sorts SockAddr by the list of sort function pointers. +func OrderedIfAddrBy(cmpFuncs ...CmpIfAddrFunc) *multiIfAddrSorter { + return &multiIfAddrSorter{ + cmp: cmpFuncs, + } +} + +// Len is part of sort.Interface. +func (ms *multiIfAddrSorter) Len() int { + return len(ms.ifAddrs) +} + +// Less is part of sort.Interface. It is implemented by looping along the Cmp() +// functions until it finds a comparison that is either less than or greater +// than. A return value of 0 defers sorting to the next function in the +// multisorter (which means the results of sorting may leave the resutls in a +// non-deterministic order). +func (ms *multiIfAddrSorter) Less(i, j int) bool { + p, q := &ms.ifAddrs[i], &ms.ifAddrs[j] + // Try all but the last comparison. + var k int + for k = 0; k < len(ms.cmp)-1; k++ { + cmp := ms.cmp[k] + x := cmp(p, q) + switch x { + case -1: + // p < q, so we have a decision. + return true + case 1: + // p > q, so we have a decision. + return false + } + // p == q; try the next comparison. + } + // All comparisons to here said "equal", so just return whatever the + // final comparison reports. + switch ms.cmp[k](p, q) { + case -1: + return true + case 1: + return false + default: + // Still a tie! Now what? + return false + panic("undefined sort order for remaining items in the list") + } +} + +// Swap is part of sort.Interface. +func (ms *multiIfAddrSorter) Swap(i, j int) { + ms.ifAddrs[i], ms.ifAddrs[j] = ms.ifAddrs[j], ms.ifAddrs[i] +} + +// AscIfAddress is a sorting function to sort IfAddrs by their respective +// address type. Non-equal types are deferred in the sort. +func AscIfAddress(p1Ptr, p2Ptr *IfAddr) int { + return AscAddress(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// AscIfDefault is a sorting function to sort IfAddrs by whether or not they +// have a default route or not. Non-equal types are deferred in the sort. +// +// FIXME: This is a particularly expensive sorting operation because of the +// non-memoized calls to NewRouteInfo(). In an ideal world the routeInfo data +// once at the start of the sort and pass it along as a context or by wrapping +// the IfAddr type with this information (this would also solve the inability to +// return errors and the possibility of failing silently). Fortunately, +// N*log(N) where N = 3 is only ~6.2 invocations. Not ideal, but not worth +// optimizing today. The common case is this gets called once or twice. +// Patches welcome. +func AscIfDefault(p1Ptr, p2Ptr *IfAddr) int { + ri, err := NewRouteInfo() + if err != nil { + return sortDeferDecision + } + + defaultIfName, err := ri.GetDefaultInterfaceName() + if err != nil { + return sortDeferDecision + } + + switch { + case p1Ptr.Interface.Name == defaultIfName && p2Ptr.Interface.Name == defaultIfName: + return sortDeferDecision + case p1Ptr.Interface.Name == defaultIfName: + return sortReceiverBeforeArg + case p2Ptr.Interface.Name == defaultIfName: + return sortArgBeforeReceiver + default: + return sortDeferDecision + } +} + +// AscIfName is a sorting function to sort IfAddrs by their interface names. +func AscIfName(p1Ptr, p2Ptr *IfAddr) int { + return strings.Compare(p1Ptr.Name, p2Ptr.Name) +} + +// AscIfNetworkSize is a sorting function to sort IfAddrs by their respective +// network mask size. +func AscIfNetworkSize(p1Ptr, p2Ptr *IfAddr) int { + return AscNetworkSize(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// AscIfPort is a sorting function to sort IfAddrs by their respective +// port type. Non-equal types are deferred in the sort. +func AscIfPort(p1Ptr, p2Ptr *IfAddr) int { + return AscPort(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// AscIfPrivate is a sorting function to sort IfAddrs by "private" values before +// "public" values. Both IPv4 and IPv6 are compared against RFC6890 (RFC6890 +// includes, and is not limited to, RFC1918 and RFC6598 for IPv4, and IPv6 +// includes RFC4193). +func AscIfPrivate(p1Ptr, p2Ptr *IfAddr) int { + return AscPrivate(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// AscIfType is a sorting function to sort IfAddrs by their respective address +// type. Non-equal types are deferred in the sort. +func AscIfType(p1Ptr, p2Ptr *IfAddr) int { + return AscType(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// DescIfAddress is identical to AscIfAddress but reverse ordered. +func DescIfAddress(p1Ptr, p2Ptr *IfAddr) int { + return -1 * AscAddress(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// DescIfDefault is identical to AscIfDefault but reverse ordered. +func DescIfDefault(p1Ptr, p2Ptr *IfAddr) int { + return -1 * AscIfDefault(p1Ptr, p2Ptr) +} + +// DescIfName is identical to AscIfName but reverse ordered. +func DescIfName(p1Ptr, p2Ptr *IfAddr) int { + return -1 * strings.Compare(p1Ptr.Name, p2Ptr.Name) +} + +// DescIfNetworkSize is identical to AscIfNetworkSize but reverse ordered. +func DescIfNetworkSize(p1Ptr, p2Ptr *IfAddr) int { + return -1 * AscNetworkSize(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// DescIfPort is identical to AscIfPort but reverse ordered. +func DescIfPort(p1Ptr, p2Ptr *IfAddr) int { + return -1 * AscPort(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// DescIfPrivate is identical to AscIfPrivate but reverse ordered. +func DescIfPrivate(p1Ptr, p2Ptr *IfAddr) int { + return -1 * AscPrivate(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// DescIfType is identical to AscIfType but reverse ordered. +func DescIfType(p1Ptr, p2Ptr *IfAddr) int { + return -1 * AscType(&p1Ptr.SockAddr, &p2Ptr.SockAddr) +} + +// FilterIfByType filters IfAddrs and returns a list of the matching type +func FilterIfByType(ifAddrs IfAddrs, type_ SockAddrType) (matchedIfs, excludedIfs IfAddrs) { + excludedIfs = make(IfAddrs, 0, len(ifAddrs)) + matchedIfs = make(IfAddrs, 0, len(ifAddrs)) + + for _, ifAddr := range ifAddrs { + if ifAddr.SockAddr.Type()&type_ != 0 { + matchedIfs = append(matchedIfs, ifAddr) + } else { + excludedIfs = append(excludedIfs, ifAddr) + } + } + return matchedIfs, excludedIfs +} + +// IfAttr forwards the selector to IfAttr.Attr() for resolution. If there is +// more than one IfAddr, only the first IfAddr is used. +func IfAttr(selectorName string, ifAddr IfAddr) (string, error) { + attrName := AttrName(strings.ToLower(selectorName)) + attrVal, err := ifAddr.Attr(attrName) + return attrVal, err +} + +// IfAttrs forwards the selector to IfAttrs.Attr() for resolution. If there is +// more than one IfAddr, only the first IfAddr is used. +func IfAttrs(selectorName string, ifAddrs IfAddrs) (string, error) { + if len(ifAddrs) == 0 { + return "", nil + } + + attrName := AttrName(strings.ToLower(selectorName)) + attrVal, err := ifAddrs[0].Attr(attrName) + return attrVal, err +} + +// GetAllInterfaces iterates over all available network interfaces and finds all +// available IP addresses on each interface and converts them to +// sockaddr.IPAddrs, and returning the result as an array of IfAddr. +func GetAllInterfaces() (IfAddrs, error) { + ifs, err := net.Interfaces() + if err != nil { + return nil, err + } + + ifAddrs := make(IfAddrs, 0, len(ifs)) + for _, intf := range ifs { + addrs, err := intf.Addrs() + if err != nil { + return nil, err + } + + for _, addr := range addrs { + var ipAddr IPAddr + ipAddr, err = NewIPAddr(addr.String()) + if err != nil { + return IfAddrs{}, fmt.Errorf("unable to create an IP address from %q", addr.String()) + } + + ifAddr := IfAddr{ + SockAddr: ipAddr, + Interface: intf, + } + ifAddrs = append(ifAddrs, ifAddr) + } + } + + return ifAddrs, nil +} + +// GetDefaultInterfaces returns IfAddrs of the addresses attached to the default +// route. +func GetDefaultInterfaces() (IfAddrs, error) { + ri, err := NewRouteInfo() + if err != nil { + return nil, err + } + + defaultIfName, err := ri.GetDefaultInterfaceName() + if err != nil { + return nil, err + } + + var defaultIfs, ifAddrs IfAddrs + ifAddrs, err = GetAllInterfaces() + for _, ifAddr := range ifAddrs { + if ifAddr.Name == defaultIfName { + defaultIfs = append(defaultIfs, ifAddr) + } + } + + return defaultIfs, nil +} + +// GetPrivateInterfaces returns an IfAddrs that are part of RFC 6890 and have a +// default route. If the system can't determine its IP address or find an RFC +// 6890 IP address, an empty IfAddrs will be returned instead. This function is +// the `eval` equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetAllInterfaces | include "type" "ip" | include "flags" "forwardable" | include "flags" "up" | sort "default,type,size" | include "RFC" "6890" }}' +/// ``` +func GetPrivateInterfaces() (IfAddrs, error) { + privateIfs, err := GetAllInterfaces() + if err != nil { + return IfAddrs{}, err + } + if len(privateIfs) == 0 { + return IfAddrs{}, nil + } + + privateIfs, _ = FilterIfByType(privateIfs, TypeIP) + if len(privateIfs) == 0 { + return IfAddrs{}, nil + } + + privateIfs, _, err = IfByFlag("forwardable", privateIfs) + if err != nil { + return IfAddrs{}, err + } + + privateIfs, _, err = IfByFlag("up", privateIfs) + if err != nil { + return IfAddrs{}, err + } + + if len(privateIfs) == 0 { + return IfAddrs{}, nil + } + + OrderedIfAddrBy(AscIfDefault, AscIfType, AscIfNetworkSize).Sort(privateIfs) + + privateIfs, _, err = IfByRFC("6890", privateIfs) + if err != nil { + return IfAddrs{}, err + } else if len(privateIfs) == 0 { + return IfAddrs{}, nil + } + + return privateIfs, nil +} + +// GetPublicInterfaces returns an IfAddrs that are NOT part of RFC 6890 and has a +// default route. If the system can't determine its IP address or find a non +// RFC 6890 IP address, an empty IfAddrs will be returned instead. This +// function is the `eval` equivalent of: +// +// ``` +// $ sockaddr eval -r '{{GetAllInterfaces | include "type" "ip" | include "flags" "forwardable" | include "flags" "up" | sort "default,type,size" | exclude "RFC" "6890" }}' +/// ``` +func GetPublicInterfaces() (IfAddrs, error) { + publicIfs, err := GetAllInterfaces() + if err != nil { + return IfAddrs{}, err + } + if len(publicIfs) == 0 { + return IfAddrs{}, nil + } + + publicIfs, _ = FilterIfByType(publicIfs, TypeIP) + if len(publicIfs) == 0 { + return IfAddrs{}, nil + } + + publicIfs, _, err = IfByFlag("forwardable", publicIfs) + if err != nil { + return IfAddrs{}, err + } + + publicIfs, _, err = IfByFlag("up", publicIfs) + if err != nil { + return IfAddrs{}, err + } + + if len(publicIfs) == 0 { + return IfAddrs{}, nil + } + + OrderedIfAddrBy(AscIfDefault, AscIfType, AscIfNetworkSize).Sort(publicIfs) + + _, publicIfs, err = IfByRFC("6890", publicIfs) + if err != nil { + return IfAddrs{}, err + } else if len(publicIfs) == 0 { + return IfAddrs{}, nil + } + + return publicIfs, nil +} + +// IfByAddress returns a list of matched and non-matched IfAddrs, or an error if +// the regexp fails to compile. +func IfByAddress(inputRe string, ifAddrs IfAddrs) (matched, remainder IfAddrs, err error) { + re, err := regexp.Compile(inputRe) + if err != nil { + return nil, nil, fmt.Errorf("Unable to compile address regexp %+q: %v", inputRe, err) + } + + matchedAddrs := make(IfAddrs, 0, len(ifAddrs)) + excludedAddrs := make(IfAddrs, 0, len(ifAddrs)) + for _, addr := range ifAddrs { + if re.MatchString(addr.SockAddr.String()) { + matchedAddrs = append(matchedAddrs, addr) + } else { + excludedAddrs = append(excludedAddrs, addr) + } + } + + return matchedAddrs, excludedAddrs, nil +} + +// IfByName returns a list of matched and non-matched IfAddrs, or an error if +// the regexp fails to compile. +func IfByName(inputRe string, ifAddrs IfAddrs) (matched, remainder IfAddrs, err error) { + re, err := regexp.Compile(inputRe) + if err != nil { + return nil, nil, fmt.Errorf("Unable to compile name regexp %+q: %v", inputRe, err) + } + + matchedAddrs := make(IfAddrs, 0, len(ifAddrs)) + excludedAddrs := make(IfAddrs, 0, len(ifAddrs)) + for _, addr := range ifAddrs { + if re.MatchString(addr.Name) { + matchedAddrs = append(matchedAddrs, addr) + } else { + excludedAddrs = append(excludedAddrs, addr) + } + } + + return matchedAddrs, excludedAddrs, nil +} + +// IfByPort returns a list of matched and non-matched IfAddrs, or an error if +// the regexp fails to compile. +func IfByPort(inputRe string, ifAddrs IfAddrs) (matchedIfs, excludedIfs IfAddrs, err error) { + re, err := regexp.Compile(inputRe) + if err != nil { + return nil, nil, fmt.Errorf("Unable to compile port regexp %+q: %v", inputRe, err) + } + + ipIfs, nonIfs := FilterIfByType(ifAddrs, TypeIP) + matchedIfs = make(IfAddrs, 0, len(ipIfs)) + excludedIfs = append(IfAddrs(nil), nonIfs...) + for _, addr := range ipIfs { + ipAddr := ToIPAddr(addr.SockAddr) + if ipAddr == nil { + continue + } + + port := strconv.FormatInt(int64((*ipAddr).IPPort()), 10) + if re.MatchString(port) { + matchedIfs = append(matchedIfs, addr) + } else { + excludedIfs = append(excludedIfs, addr) + } + } + + return matchedIfs, excludedIfs, nil +} + +// IfByRFC returns a list of matched and non-matched IfAddrs that contain the +// relevant RFC-specified traits. +func IfByRFC(selectorParam string, ifAddrs IfAddrs) (matched, remainder IfAddrs, err error) { + inputRFC, err := strconv.ParseUint(selectorParam, 10, 64) + if err != nil { + return IfAddrs{}, IfAddrs{}, fmt.Errorf("unable to parse RFC number %q: %v", selectorParam, err) + } + + matchedIfAddrs := make(IfAddrs, 0, len(ifAddrs)) + remainingIfAddrs := make(IfAddrs, 0, len(ifAddrs)) + + rfcNetMap := KnownRFCs() + rfcNets, ok := rfcNetMap[uint(inputRFC)] + if !ok { + return nil, nil, fmt.Errorf("unsupported RFC %d", inputRFC) + } + + for _, ifAddr := range ifAddrs { + var contained bool + for _, rfcNet := range rfcNets { + if rfcNet.Contains(ifAddr.SockAddr) { + matchedIfAddrs = append(matchedIfAddrs, ifAddr) + contained = true + break + } + } + if !contained { + remainingIfAddrs = append(remainingIfAddrs, ifAddr) + } + } + + return matchedIfAddrs, remainingIfAddrs, nil +} + +// IfByRFCs returns a list of matched and non-matched IfAddrs that contain the +// relevant RFC-specified traits. Multiple RFCs can be specified and separated +// by the `|` symbol. No protection is taken to ensure an IfAddr does not end +// up in both the included and excluded list. +func IfByRFCs(selectorParam string, ifAddrs IfAddrs) (matched, remainder IfAddrs, err error) { + var includedIfs, excludedIfs IfAddrs + for _, rfcStr := range strings.Split(selectorParam, "|") { + includedRFCIfs, excludedRFCIfs, err := IfByRFC(rfcStr, ifAddrs) + if err != nil { + return IfAddrs{}, IfAddrs{}, fmt.Errorf("unable to lookup RFC number %q: %v", rfcStr, err) + } + includedIfs = append(includedIfs, includedRFCIfs...) + excludedIfs = append(excludedIfs, excludedRFCIfs...) + } + + return includedIfs, excludedIfs, nil +} + +// IfByMaskSize returns a list of matched and non-matched IfAddrs that have the +// matching mask size. +func IfByMaskSize(selectorParam string, ifAddrs IfAddrs) (matchedIfs, excludedIfs IfAddrs, err error) { + maskSize, err := strconv.ParseUint(selectorParam, 10, 64) + if err != nil { + return IfAddrs{}, IfAddrs{}, fmt.Errorf("invalid exclude size argument (%q): %v", selectorParam, err) + } + + ipIfs, nonIfs := FilterIfByType(ifAddrs, TypeIP) + matchedIfs = make(IfAddrs, 0, len(ipIfs)) + excludedIfs = append(IfAddrs(nil), nonIfs...) + for _, addr := range ipIfs { + ipAddr := ToIPAddr(addr.SockAddr) + if ipAddr == nil { + return IfAddrs{}, IfAddrs{}, fmt.Errorf("unable to filter mask sizes on non-IP type %s: %v", addr.SockAddr.Type().String(), addr.SockAddr.String()) + } + + switch { + case (*ipAddr).Type()&TypeIPv4 != 0 && maskSize > 32: + return IfAddrs{}, IfAddrs{}, fmt.Errorf("mask size out of bounds for IPv4 address: %d", maskSize) + case (*ipAddr).Type()&TypeIPv6 != 0 && maskSize > 128: + return IfAddrs{}, IfAddrs{}, fmt.Errorf("mask size out of bounds for IPv6 address: %d", maskSize) + } + + if (*ipAddr).Maskbits() == int(maskSize) { + matchedIfs = append(matchedIfs, addr) + } else { + excludedIfs = append(excludedIfs, addr) + } + } + + return matchedIfs, excludedIfs, nil +} + +// IfByType returns a list of matching and non-matching IfAddr that match the +// specified type. For instance: +// +// include "type" "IPv4,IPv6" +// +// will include any IfAddrs that is either an IPv4 or IPv6 address. Any +// addresses on those interfaces that don't match will be included in the +// remainder results. +func IfByType(inputTypes string, ifAddrs IfAddrs) (matched, remainder IfAddrs, err error) { + matchingIfAddrs := make(IfAddrs, 0, len(ifAddrs)) + remainingIfAddrs := make(IfAddrs, 0, len(ifAddrs)) + + ifTypes := strings.Split(strings.ToLower(inputTypes), "|") + for _, ifType := range ifTypes { + switch ifType { + case "ip", "ipv4", "ipv6", "unix": + // Valid types + default: + return nil, nil, fmt.Errorf("unsupported type %q %q", ifType, inputTypes) + } + } + + for _, ifAddr := range ifAddrs { + for _, ifType := range ifTypes { + var matched bool + switch { + case ifType == "ip" && ifAddr.SockAddr.Type()&TypeIP != 0: + matched = true + case ifType == "ipv4" && ifAddr.SockAddr.Type()&TypeIPv4 != 0: + matched = true + case ifType == "ipv6" && ifAddr.SockAddr.Type()&TypeIPv6 != 0: + matched = true + case ifType == "unix" && ifAddr.SockAddr.Type()&TypeUnix != 0: + matched = true + } + + if matched { + matchingIfAddrs = append(matchingIfAddrs, ifAddr) + } else { + remainingIfAddrs = append(remainingIfAddrs, ifAddr) + } + } + } + + return matchingIfAddrs, remainingIfAddrs, nil +} + +// IfByFlag returns a list of matching and non-matching IfAddrs that match the +// specified type. For instance: +// +// include "flag" "up,broadcast" +// +// will include any IfAddrs that have both the "up" and "broadcast" flags set. +// Any addresses on those interfaces that don't match will be omitted from the +// results. +func IfByFlag(inputFlags string, ifAddrs IfAddrs) (matched, remainder IfAddrs, err error) { + matchedAddrs := make(IfAddrs, 0, len(ifAddrs)) + excludedAddrs := make(IfAddrs, 0, len(ifAddrs)) + + var wantForwardable, + wantGlobalUnicast, + wantInterfaceLocalMulticast, + wantLinkLocalMulticast, + wantLinkLocalUnicast, + wantLoopback, + wantMulticast, + wantUnspecified bool + var ifFlags net.Flags + var checkFlags, checkAttrs bool + for _, flagName := range strings.Split(strings.ToLower(inputFlags), "|") { + switch flagName { + case "broadcast": + checkFlags = true + ifFlags = ifFlags | net.FlagBroadcast + case "down": + checkFlags = true + ifFlags = (ifFlags &^ net.FlagUp) + case "forwardable": + checkAttrs = true + wantForwardable = true + case "global unicast": + checkAttrs = true + wantGlobalUnicast = true + case "interface-local multicast": + checkAttrs = true + wantInterfaceLocalMulticast = true + case "link-local multicast": + checkAttrs = true + wantLinkLocalMulticast = true + case "link-local unicast": + checkAttrs = true + wantLinkLocalUnicast = true + case "loopback": + checkAttrs = true + checkFlags = true + ifFlags = ifFlags | net.FlagLoopback + wantLoopback = true + case "multicast": + checkAttrs = true + checkFlags = true + ifFlags = ifFlags | net.FlagMulticast + wantMulticast = true + case "point-to-point": + checkFlags = true + ifFlags = ifFlags | net.FlagPointToPoint + case "unspecified": + checkAttrs = true + wantUnspecified = true + case "up": + checkFlags = true + ifFlags = ifFlags | net.FlagUp + default: + return nil, nil, fmt.Errorf("Unknown interface flag: %+q", flagName) + } + } + + for _, ifAddr := range ifAddrs { + var matched bool + if checkFlags && ifAddr.Interface.Flags&ifFlags == ifFlags { + matched = true + } + if checkAttrs { + if ip := ToIPAddr(ifAddr.SockAddr); ip != nil { + netIP := (*ip).NetIP() + switch { + case wantGlobalUnicast && netIP.IsGlobalUnicast(): + matched = true + case wantInterfaceLocalMulticast && netIP.IsInterfaceLocalMulticast(): + matched = true + case wantLinkLocalMulticast && netIP.IsLinkLocalMulticast(): + matched = true + case wantLinkLocalUnicast && netIP.IsLinkLocalUnicast(): + matched = true + case wantLoopback && netIP.IsLoopback(): + matched = true + case wantMulticast && netIP.IsMulticast(): + matched = true + case wantUnspecified && netIP.IsUnspecified(): + matched = true + case wantForwardable && !IsRFC(ForwardingBlacklist, ifAddr.SockAddr): + matched = true + } + } + } + if matched { + matchedAddrs = append(matchedAddrs, ifAddr) + } else { + excludedAddrs = append(excludedAddrs, ifAddr) + } + } + return matchedAddrs, excludedAddrs, nil +} + +// IfByNetwork returns an IfAddrs that are equal to or included within the +// network passed in by selector. +func IfByNetwork(selectorParam string, inputIfAddrs IfAddrs) (IfAddrs, IfAddrs, error) { + var includedIfs, excludedIfs IfAddrs + for _, netStr := range strings.Split(selectorParam, "|") { + netAddr, err := NewIPAddr(netStr) + if err != nil { + return nil, nil, fmt.Errorf("unable to create an IP address from %+q: %v", netStr, err) + } + + for _, ifAddr := range inputIfAddrs { + if netAddr.Contains(ifAddr.SockAddr) { + includedIfs = append(includedIfs, ifAddr) + } else { + excludedIfs = append(excludedIfs, ifAddr) + } + } + } + + return includedIfs, excludedIfs, nil +} + +// IfAddrMath will return a new IfAddr struct with a mutated value. +func IfAddrMath(operation, value string, inputIfAddr IfAddr) (IfAddr, error) { + // Regexp used to enforce the sign being a required part of the grammar for + // some values. + signRe := signRE.Copy() + + switch strings.ToLower(operation) { + case "address": + // "address" operates on the IP address and is allowed to overflow or + // underflow networks, however it will wrap along the underlying address's + // underlying type. + + if !signRe.MatchString(value) { + return IfAddr{}, fmt.Errorf("sign (+/-) is required for operation %q", operation) + } + + switch sockType := inputIfAddr.SockAddr.Type(); sockType { + case TypeIPv4: + // 33 == Accept any uint32 value + // TODO(seanc@): Add the ability to parse hex + i, err := strconv.ParseInt(value, 10, 33) + if err != nil { + return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err) + } + + ipv4 := *ToIPv4Addr(inputIfAddr.SockAddr) + ipv4Uint32 := uint32(ipv4.Address) + ipv4Uint32 += uint32(i) + return IfAddr{ + SockAddr: IPv4Addr{ + Address: IPv4Address(ipv4Uint32), + Mask: ipv4.Mask, + }, + Interface: inputIfAddr.Interface, + }, nil + case TypeIPv6: + // 64 == Accept any int32 value + // TODO(seanc@): Add the ability to parse hex. Also parse a bignum int. + i, err := strconv.ParseInt(value, 10, 64) + if err != nil { + return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err) + } + + ipv6 := *ToIPv6Addr(inputIfAddr.SockAddr) + ipv6BigIntA := new(big.Int) + ipv6BigIntA.Set(ipv6.Address) + ipv6BigIntB := big.NewInt(i) + + ipv6Addr := ipv6BigIntA.Add(ipv6BigIntA, ipv6BigIntB) + ipv6Addr.And(ipv6Addr, ipv6HostMask) + + return IfAddr{ + SockAddr: IPv6Addr{ + Address: IPv6Address(ipv6Addr), + Mask: ipv6.Mask, + }, + Interface: inputIfAddr.Interface, + }, nil + default: + return IfAddr{}, fmt.Errorf("unsupported type for operation %q: %T", operation, sockType) + } + case "network": + // "network" operates on the network address. Positive values start at the + // network address and negative values wrap at the network address, which + // means a "-1" value on a network will be the broadcast address after + // wrapping is applied. + + if !signRe.MatchString(value) { + return IfAddr{}, fmt.Errorf("sign (+/-) is required for operation %q", operation) + } + + switch sockType := inputIfAddr.SockAddr.Type(); sockType { + case TypeIPv4: + // 33 == Accept any uint32 value + // TODO(seanc@): Add the ability to parse hex + i, err := strconv.ParseInt(value, 10, 33) + if err != nil { + return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err) + } + + ipv4 := *ToIPv4Addr(inputIfAddr.SockAddr) + ipv4Uint32 := uint32(ipv4.NetworkAddress()) + + // Wrap along network mask boundaries. EZ-mode wrapping made possible by + // use of int64 vs a uint. + var wrappedMask int64 + if i >= 0 { + wrappedMask = i + } else { + wrappedMask = 1 + i + int64(^uint32(ipv4.Mask)) + } + + ipv4Uint32 = ipv4Uint32 + (uint32(wrappedMask) &^ uint32(ipv4.Mask)) + + return IfAddr{ + SockAddr: IPv4Addr{ + Address: IPv4Address(ipv4Uint32), + Mask: ipv4.Mask, + }, + Interface: inputIfAddr.Interface, + }, nil + case TypeIPv6: + // 64 == Accept any int32 value + // TODO(seanc@): Add the ability to parse hex. Also parse a bignum int. + i, err := strconv.ParseInt(value, 10, 64) + if err != nil { + return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err) + } + + ipv6 := *ToIPv6Addr(inputIfAddr.SockAddr) + ipv6BigInt := new(big.Int) + ipv6BigInt.Set(ipv6.NetworkAddress()) + + mask := new(big.Int) + mask.Set(ipv6.Mask) + if i > 0 { + wrappedMask := new(big.Int) + wrappedMask.SetInt64(i) + + wrappedMask.AndNot(wrappedMask, mask) + ipv6BigInt.Add(ipv6BigInt, wrappedMask) + } else { + // Mask off any bits that exceed the network size. Subtract the + // wrappedMask from the last usable - 1 + wrappedMask := new(big.Int) + wrappedMask.SetInt64(-1 * i) + wrappedMask.Sub(wrappedMask, big.NewInt(1)) + + wrappedMask.AndNot(wrappedMask, mask) + + lastUsable := new(big.Int) + lastUsable.Set(ipv6.LastUsable().(IPv6Addr).Address) + + ipv6BigInt = lastUsable.Sub(lastUsable, wrappedMask) + } + + return IfAddr{ + SockAddr: IPv6Addr{ + Address: IPv6Address(ipv6BigInt), + Mask: ipv6.Mask, + }, + Interface: inputIfAddr.Interface, + }, nil + default: + return IfAddr{}, fmt.Errorf("unsupported type for operation %q: %T", operation, sockType) + } + case "mask": + // "mask" operates on the IP address and returns the IP address on + // which the given integer mask has been applied. If the applied mask + // corresponds to a larger network than the mask of the IP address, + // the latter will be replaced by the former. + switch sockType := inputIfAddr.SockAddr.Type(); sockType { + case TypeIPv4: + i, err := strconv.ParseUint(value, 10, 32) + if err != nil { + return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err) + } + + if i > 32 { + return IfAddr{}, fmt.Errorf("parameter for operation %q on ipv4 addresses must be between 0 and 32", operation) + } + + ipv4 := *ToIPv4Addr(inputIfAddr.SockAddr) + + ipv4Mask := net.CIDRMask(int(i), 32) + ipv4MaskUint32 := binary.BigEndian.Uint32(ipv4Mask) + + maskedIpv4 := ipv4.NetIP().Mask(ipv4Mask) + maskedIpv4Uint32 := binary.BigEndian.Uint32(maskedIpv4) + + maskedIpv4MaskUint32 := uint32(ipv4.Mask) + + if ipv4MaskUint32 < maskedIpv4MaskUint32 { + maskedIpv4MaskUint32 = ipv4MaskUint32 + } + + return IfAddr{ + SockAddr: IPv4Addr{ + Address: IPv4Address(maskedIpv4Uint32), + Mask: IPv4Mask(maskedIpv4MaskUint32), + }, + Interface: inputIfAddr.Interface, + }, nil + case TypeIPv6: + i, err := strconv.ParseUint(value, 10, 32) + if err != nil { + return IfAddr{}, fmt.Errorf("unable to convert %q to int for operation %q: %v", value, operation, err) + } + + if i > 128 { + return IfAddr{}, fmt.Errorf("parameter for operation %q on ipv6 addresses must be between 0 and 64", operation) + } + + ipv6 := *ToIPv6Addr(inputIfAddr.SockAddr) + + ipv6Mask := net.CIDRMask(int(i), 128) + ipv6MaskBigInt := new(big.Int) + ipv6MaskBigInt.SetBytes(ipv6Mask) + + maskedIpv6 := ipv6.NetIP().Mask(ipv6Mask) + maskedIpv6BigInt := new(big.Int) + maskedIpv6BigInt.SetBytes(maskedIpv6) + + maskedIpv6MaskBigInt := new(big.Int) + maskedIpv6MaskBigInt.Set(ipv6.Mask) + + if ipv6MaskBigInt.Cmp(maskedIpv6MaskBigInt) == -1 { + maskedIpv6MaskBigInt = ipv6MaskBigInt + } + + return IfAddr{ + SockAddr: IPv6Addr{ + Address: IPv6Address(maskedIpv6BigInt), + Mask: IPv6Mask(maskedIpv6MaskBigInt), + }, + Interface: inputIfAddr.Interface, + }, nil + default: + return IfAddr{}, fmt.Errorf("unsupported type for operation %q: %T", operation, sockType) + } + default: + return IfAddr{}, fmt.Errorf("unsupported math operation: %q", operation) + } +} + +// IfAddrsMath will apply an IfAddrMath operation each IfAddr struct. Any +// failure will result in zero results. +func IfAddrsMath(operation, value string, inputIfAddrs IfAddrs) (IfAddrs, error) { + outputAddrs := make(IfAddrs, 0, len(inputIfAddrs)) + for _, ifAddr := range inputIfAddrs { + result, err := IfAddrMath(operation, value, ifAddr) + if err != nil { + return IfAddrs{}, fmt.Errorf("unable to perform an IPMath operation on %s: %v", ifAddr, err) + } + outputAddrs = append(outputAddrs, result) + } + return outputAddrs, nil +} + +// IncludeIfs returns an IfAddrs based on the passed in selector. +func IncludeIfs(selectorName, selectorParam string, inputIfAddrs IfAddrs) (IfAddrs, error) { + var includedIfs IfAddrs + var err error + + switch strings.ToLower(selectorName) { + case "address": + includedIfs, _, err = IfByAddress(selectorParam, inputIfAddrs) + case "flag", "flags": + includedIfs, _, err = IfByFlag(selectorParam, inputIfAddrs) + case "name": + includedIfs, _, err = IfByName(selectorParam, inputIfAddrs) + case "network": + includedIfs, _, err = IfByNetwork(selectorParam, inputIfAddrs) + case "port": + includedIfs, _, err = IfByPort(selectorParam, inputIfAddrs) + case "rfc", "rfcs": + includedIfs, _, err = IfByRFCs(selectorParam, inputIfAddrs) + case "size": + includedIfs, _, err = IfByMaskSize(selectorParam, inputIfAddrs) + case "type": + includedIfs, _, err = IfByType(selectorParam, inputIfAddrs) + default: + return IfAddrs{}, fmt.Errorf("invalid include selector %q", selectorName) + } + + if err != nil { + return IfAddrs{}, err + } + + return includedIfs, nil +} + +// ExcludeIfs returns an IfAddrs based on the passed in selector. +func ExcludeIfs(selectorName, selectorParam string, inputIfAddrs IfAddrs) (IfAddrs, error) { + var excludedIfs IfAddrs + var err error + + switch strings.ToLower(selectorName) { + case "address": + _, excludedIfs, err = IfByAddress(selectorParam, inputIfAddrs) + case "flag", "flags": + _, excludedIfs, err = IfByFlag(selectorParam, inputIfAddrs) + case "name": + _, excludedIfs, err = IfByName(selectorParam, inputIfAddrs) + case "network": + _, excludedIfs, err = IfByNetwork(selectorParam, inputIfAddrs) + case "port": + _, excludedIfs, err = IfByPort(selectorParam, inputIfAddrs) + case "rfc", "rfcs": + _, excludedIfs, err = IfByRFCs(selectorParam, inputIfAddrs) + case "size": + _, excludedIfs, err = IfByMaskSize(selectorParam, inputIfAddrs) + case "type": + _, excludedIfs, err = IfByType(selectorParam, inputIfAddrs) + default: + return IfAddrs{}, fmt.Errorf("invalid exclude selector %q", selectorName) + } + + if err != nil { + return IfAddrs{}, err + } + + return excludedIfs, nil +} + +// SortIfBy returns an IfAddrs sorted based on the passed in selector. Multiple +// sort clauses can be passed in as a comma delimited list without whitespace. +func SortIfBy(selectorParam string, inputIfAddrs IfAddrs) (IfAddrs, error) { + sortedIfs := append(IfAddrs(nil), inputIfAddrs...) + + clauses := strings.Split(selectorParam, ",") + sortFuncs := make([]CmpIfAddrFunc, len(clauses)) + + for i, clause := range clauses { + switch strings.TrimSpace(strings.ToLower(clause)) { + case "+address", "address": + // The "address" selector returns an array of IfAddrs + // ordered by the network address. IfAddrs that are not + // comparable will be at the end of the list and in a + // non-deterministic order. + sortFuncs[i] = AscIfAddress + case "-address": + sortFuncs[i] = DescIfAddress + case "+default", "default": + sortFuncs[i] = AscIfDefault + case "-default": + sortFuncs[i] = DescIfDefault + case "+name", "name": + // The "name" selector returns an array of IfAddrs + // ordered by the interface name. + sortFuncs[i] = AscIfName + case "-name": + sortFuncs[i] = DescIfName + case "+port", "port": + // The "port" selector returns an array of IfAddrs + // ordered by the port, if included in the IfAddr. + // IfAddrs that are not comparable will be at the end of + // the list and in a non-deterministic order. + sortFuncs[i] = AscIfPort + case "-port": + sortFuncs[i] = DescIfPort + case "+private", "private": + // The "private" selector returns an array of IfAddrs + // ordered by private addresses first. IfAddrs that are + // not comparable will be at the end of the list and in + // a non-deterministic order. + sortFuncs[i] = AscIfPrivate + case "-private": + sortFuncs[i] = DescIfPrivate + case "+size", "size": + // The "size" selector returns an array of IfAddrs + // ordered by the size of the network mask, smaller mask + // (larger number of hosts per network) to largest + // (e.g. a /24 sorts before a /32). + sortFuncs[i] = AscIfNetworkSize + case "-size": + sortFuncs[i] = DescIfNetworkSize + case "+type", "type": + // The "type" selector returns an array of IfAddrs + // ordered by the type of the IfAddr. The sort order is + // Unix, IPv4, then IPv6. + sortFuncs[i] = AscIfType + case "-type": + sortFuncs[i] = DescIfType + default: + // Return an empty list for invalid sort types. + return IfAddrs{}, fmt.Errorf("unknown sort type: %q", clause) + } + } + + OrderedIfAddrBy(sortFuncs...).Sort(sortedIfs) + + return sortedIfs, nil +} + +// UniqueIfAddrsBy creates a unique set of IfAddrs based on the matching +// selector. UniqueIfAddrsBy assumes the input has already been sorted. +func UniqueIfAddrsBy(selectorName string, inputIfAddrs IfAddrs) (IfAddrs, error) { + attrName := strings.ToLower(selectorName) + + ifs := make(IfAddrs, 0, len(inputIfAddrs)) + var lastMatch string + for _, ifAddr := range inputIfAddrs { + var out string + switch attrName { + case "address": + out = ifAddr.SockAddr.String() + case "name": + out = ifAddr.Name + default: + return nil, fmt.Errorf("unsupported unique constraint %+q", selectorName) + } + + switch { + case lastMatch == "", lastMatch != out: + lastMatch = out + ifs = append(ifs, ifAddr) + case lastMatch == out: + continue + } + } + + return ifs, nil +} + +// JoinIfAddrs joins an IfAddrs and returns a string +func JoinIfAddrs(selectorName string, joinStr string, inputIfAddrs IfAddrs) (string, error) { + outputs := make([]string, 0, len(inputIfAddrs)) + attrName := AttrName(strings.ToLower(selectorName)) + + for _, ifAddr := range inputIfAddrs { + var attrVal string + var err error + attrVal, err = ifAddr.Attr(attrName) + if err != nil { + return "", err + } + outputs = append(outputs, attrVal) + } + return strings.Join(outputs, joinStr), nil +} + +// LimitIfAddrs returns a slice of IfAddrs based on the specified limit. +func LimitIfAddrs(lim uint, in IfAddrs) (IfAddrs, error) { + // Clamp the limit to the length of the array + if int(lim) > len(in) { + lim = uint(len(in)) + } + + return in[0:lim], nil +} + +// OffsetIfAddrs returns a slice of IfAddrs based on the specified offset. +func OffsetIfAddrs(off int, in IfAddrs) (IfAddrs, error) { + var end bool + if off < 0 { + end = true + off = off * -1 + } + + if off > len(in) { + return IfAddrs{}, fmt.Errorf("unable to seek past the end of the interface array: offset (%d) exceeds the number of interfaces (%d)", off, len(in)) + } + + if end { + return in[len(in)-off:], nil + } + return in[off:], nil +} + +func (ifAddr IfAddr) String() string { + return fmt.Sprintf("%s %v", ifAddr.SockAddr, ifAddr.Interface) +} + +// parseDefaultIfNameFromRoute parses standard route(8)'s output for the *BSDs +// and Solaris. +func parseDefaultIfNameFromRoute(routeOut string) (string, error) { + lines := strings.Split(routeOut, "\n") + for _, line := range lines { + kvs := strings.SplitN(line, ":", 2) + if len(kvs) != 2 { + continue + } + + if strings.TrimSpace(kvs[0]) == "interface" { + ifName := strings.TrimSpace(kvs[1]) + return ifName, nil + } + } + + return "", errors.New("No default interface found") +} + +// parseDefaultIfNameFromIPCmd parses the default interface from ip(8) for +// Linux. +func parseDefaultIfNameFromIPCmd(routeOut string) (string, error) { + lines := strings.Split(routeOut, "\n") + re := whitespaceRE.Copy() + for _, line := range lines { + kvs := re.Split(line, -1) + if len(kvs) < 5 { + continue + } + + if kvs[0] == "default" && + kvs[1] == "via" && + kvs[3] == "dev" { + ifName := strings.TrimSpace(kvs[4]) + return ifName, nil + } + } + + return "", errors.New("No default interface found") +} + +// parseDefaultIfNameWindows parses the default interface from `netstat -rn` and +// `ipconfig` on Windows. +func parseDefaultIfNameWindows(routeOut, ipconfigOut string) (string, error) { + defaultIPAddr, err := parseDefaultIPAddrWindowsRoute(routeOut) + if err != nil { + return "", err + } + + ifName, err := parseDefaultIfNameWindowsIPConfig(defaultIPAddr, ipconfigOut) + if err != nil { + return "", err + } + + return ifName, nil +} + +// parseDefaultIPAddrWindowsRoute parses the IP address on the default interface +// `netstat -rn`. +// +// NOTES(sean): Only IPv4 addresses are parsed at this time. If you have an +// IPv6 connected host, submit an issue on github.com/hashicorp/go-sockaddr with +// the output from `netstat -rn`, `ipconfig`, and version of Windows to see IPv6 +// support added. +func parseDefaultIPAddrWindowsRoute(routeOut string) (string, error) { + lines := strings.Split(routeOut, "\n") + re := whitespaceRE.Copy() + for _, line := range lines { + kvs := re.Split(strings.TrimSpace(line), -1) + if len(kvs) < 3 { + continue + } + + if kvs[0] == "0.0.0.0" && kvs[1] == "0.0.0.0" { + defaultIPAddr := strings.TrimSpace(kvs[3]) + return defaultIPAddr, nil + } + } + + return "", errors.New("No IP on default interface found") +} + +// parseDefaultIfNameWindowsIPConfig parses the output of `ipconfig` to find the +// interface name forwarding traffic to the default gateway. +func parseDefaultIfNameWindowsIPConfig(defaultIPAddr, routeOut string) (string, error) { + lines := strings.Split(routeOut, "\n") + ifNameRe := ifNameRE.Copy() + ipAddrRe := ipAddrRE.Copy() + var ifName string + for _, line := range lines { + switch ifNameMatches := ifNameRe.FindStringSubmatch(line); { + case len(ifNameMatches) > 1: + ifName = ifNameMatches[1] + continue + } + + switch ipAddrMatches := ipAddrRe.FindStringSubmatch(line); { + case len(ipAddrMatches) > 1 && ipAddrMatches[1] == defaultIPAddr: + return ifName, nil + } + } + + return "", errors.New("No default interface found with matching IP") +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/ifattr.go b/vendor/github.com/hashicorp/go-sockaddr/ifattr.go new file mode 100644 index 0000000..6984cb4 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ifattr.go @@ -0,0 +1,65 @@ +package sockaddr + +import ( + "fmt" + "net" +) + +// IfAddr is a union of a SockAddr and a net.Interface. +type IfAddr struct { + SockAddr + net.Interface +} + +// Attr returns the named attribute as a string +func (ifAddr IfAddr) Attr(attrName AttrName) (string, error) { + val := IfAddrAttr(ifAddr, attrName) + if val != "" { + return val, nil + } + + return Attr(ifAddr.SockAddr, attrName) +} + +// Attr returns the named attribute as a string +func Attr(sa SockAddr, attrName AttrName) (string, error) { + switch sockType := sa.Type(); { + case sockType&TypeIP != 0: + ip := *ToIPAddr(sa) + attrVal := IPAddrAttr(ip, attrName) + if attrVal != "" { + return attrVal, nil + } + + if sockType == TypeIPv4 { + ipv4 := *ToIPv4Addr(sa) + attrVal := IPv4AddrAttr(ipv4, attrName) + if attrVal != "" { + return attrVal, nil + } + } else if sockType == TypeIPv6 { + ipv6 := *ToIPv6Addr(sa) + attrVal := IPv6AddrAttr(ipv6, attrName) + if attrVal != "" { + return attrVal, nil + } + } + + case sockType == TypeUnix: + us := *ToUnixSock(sa) + attrVal := UnixSockAttr(us, attrName) + if attrVal != "" { + return attrVal, nil + } + } + + // Non type-specific attributes + switch attrName { + case "string": + return sa.String(), nil + case "type": + return sa.Type().String(), nil + } + + return "", fmt.Errorf("unsupported attribute name %q", attrName) +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/ipaddr.go b/vendor/github.com/hashicorp/go-sockaddr/ipaddr.go new file mode 100644 index 0000000..b47d15c --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ipaddr.go @@ -0,0 +1,169 @@ +package sockaddr + +import ( + "fmt" + "math/big" + "net" + "strings" +) + +// Constants for the sizes of IPv3, IPv4, and IPv6 address types. +const ( + IPv3len = 6 + IPv4len = 4 + IPv6len = 16 +) + +// IPAddr is a generic IP address interface for IPv4 and IPv6 addresses, +// networks, and socket endpoints. +type IPAddr interface { + SockAddr + AddressBinString() string + AddressHexString() string + Cmp(SockAddr) int + CmpAddress(SockAddr) int + CmpPort(SockAddr) int + FirstUsable() IPAddr + Host() IPAddr + IPPort() IPPort + LastUsable() IPAddr + Maskbits() int + NetIP() *net.IP + NetIPMask() *net.IPMask + NetIPNet() *net.IPNet + Network() IPAddr + Octets() []int +} + +// IPPort is the type for an IP port number for the TCP and UDP IP transports. +type IPPort uint16 + +// IPPrefixLen is a typed integer representing the prefix length for a given +// IPAddr. +type IPPrefixLen byte + +// ipAddrAttrMap is a map of the IPAddr type-specific attributes. +var ipAddrAttrMap map[AttrName]func(IPAddr) string +var ipAddrAttrs []AttrName + +func init() { + ipAddrInit() +} + +// NewIPAddr creates a new IPAddr from a string. Returns nil if the string is +// not an IPv4 or an IPv6 address. +func NewIPAddr(addr string) (IPAddr, error) { + ipv4Addr, err := NewIPv4Addr(addr) + if err == nil { + return ipv4Addr, nil + } + + ipv6Addr, err := NewIPv6Addr(addr) + if err == nil { + return ipv6Addr, nil + } + + return nil, fmt.Errorf("invalid IPAddr %v", addr) +} + +// IPAddrAttr returns a string representation of an attribute for the given +// IPAddr. +func IPAddrAttr(ip IPAddr, selector AttrName) string { + fn, found := ipAddrAttrMap[selector] + if !found { + return "" + } + + return fn(ip) +} + +// IPAttrs returns a list of attributes supported by the IPAddr type +func IPAttrs() []AttrName { + return ipAddrAttrs +} + +// MustIPAddr is a helper method that must return an IPAddr or panic on invalid +// input. +func MustIPAddr(addr string) IPAddr { + ip, err := NewIPAddr(addr) + if err != nil { + panic(fmt.Sprintf("Unable to create an IPAddr from %+q: %v", addr, err)) + } + return ip +} + +// ipAddrInit is called once at init() +func ipAddrInit() { + // Sorted for human readability + ipAddrAttrs = []AttrName{ + "host", + "address", + "port", + "netmask", + "network", + "mask_bits", + "binary", + "hex", + "first_usable", + "last_usable", + "octets", + } + + ipAddrAttrMap = map[AttrName]func(ip IPAddr) string{ + "address": func(ip IPAddr) string { + return ip.NetIP().String() + }, + "binary": func(ip IPAddr) string { + return ip.AddressBinString() + }, + "first_usable": func(ip IPAddr) string { + return ip.FirstUsable().String() + }, + "hex": func(ip IPAddr) string { + return ip.AddressHexString() + }, + "host": func(ip IPAddr) string { + return ip.Host().String() + }, + "last_usable": func(ip IPAddr) string { + return ip.LastUsable().String() + }, + "mask_bits": func(ip IPAddr) string { + return fmt.Sprintf("%d", ip.Maskbits()) + }, + "netmask": func(ip IPAddr) string { + switch v := ip.(type) { + case IPv4Addr: + ipv4Mask := IPv4Addr{ + Address: IPv4Address(v.Mask), + Mask: IPv4HostMask, + } + return ipv4Mask.String() + case IPv6Addr: + ipv6Mask := new(big.Int) + ipv6Mask.Set(v.Mask) + ipv6MaskAddr := IPv6Addr{ + Address: IPv6Address(ipv6Mask), + Mask: ipv6HostMask, + } + return ipv6MaskAddr.String() + default: + return fmt.Sprintf("<unsupported type: %T>", ip) + } + }, + "network": func(ip IPAddr) string { + return ip.Network().NetIP().String() + }, + "octets": func(ip IPAddr) string { + octets := ip.Octets() + octetStrs := make([]string, 0, len(octets)) + for _, octet := range octets { + octetStrs = append(octetStrs, fmt.Sprintf("%d", octet)) + } + return strings.Join(octetStrs, " ") + }, + "port": func(ip IPAddr) string { + return fmt.Sprintf("%d", ip.IPPort()) + }, + } +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/ipaddrs.go b/vendor/github.com/hashicorp/go-sockaddr/ipaddrs.go new file mode 100644 index 0000000..6eeb7dd --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ipaddrs.go @@ -0,0 +1,98 @@ +package sockaddr + +import "bytes" + +type IPAddrs []IPAddr + +func (s IPAddrs) Len() int { return len(s) } +func (s IPAddrs) Swap(i, j int) { s[i], s[j] = s[j], s[i] } + +// // SortIPAddrsByCmp is a type that satisfies sort.Interface and can be used +// // by the routines in this package. The SortIPAddrsByCmp type is used to +// // sort IPAddrs by Cmp() +// type SortIPAddrsByCmp struct{ IPAddrs } + +// // Less reports whether the element with index i should sort before the +// // element with index j. +// func (s SortIPAddrsByCmp) Less(i, j int) bool { +// // Sort by Type, then address, then port number. +// return Less(s.IPAddrs[i], s.IPAddrs[j]) +// } + +// SortIPAddrsBySpecificMaskLen is a type that satisfies sort.Interface and +// can be used by the routines in this package. The +// SortIPAddrsBySpecificMaskLen type is used to sort IPAddrs by smallest +// network (most specific to largest network). +type SortIPAddrsByNetworkSize struct{ IPAddrs } + +// Less reports whether the element with index i should sort before the +// element with index j. +func (s SortIPAddrsByNetworkSize) Less(i, j int) bool { + // Sort masks with a larger binary value (i.e. fewer hosts per network + // prefix) after masks with a smaller value (larger number of hosts per + // prefix). + switch bytes.Compare([]byte(*s.IPAddrs[i].NetIPMask()), []byte(*s.IPAddrs[j].NetIPMask())) { + case 0: + // Fall through to the second test if the net.IPMasks are the + // same. + break + case 1: + return true + case -1: + return false + default: + panic("bad, m'kay?") + } + + // Sort IPs based on the length (i.e. prefer IPv4 over IPv6). + iLen := len(*s.IPAddrs[i].NetIP()) + jLen := len(*s.IPAddrs[j].NetIP()) + if iLen != jLen { + return iLen > jLen + } + + // Sort IPs based on their network address from lowest to highest. + switch bytes.Compare(s.IPAddrs[i].NetIPNet().IP, s.IPAddrs[j].NetIPNet().IP) { + case 0: + break + case 1: + return false + case -1: + return true + default: + panic("lol wut?") + } + + // If a host does not have a port set, it always sorts after hosts + // that have a port (e.g. a host with a /32 and port number is more + // specific and should sort first over a host with a /32 but no port + // set). + if s.IPAddrs[i].IPPort() == 0 || s.IPAddrs[j].IPPort() == 0 { + return false + } + return s.IPAddrs[i].IPPort() < s.IPAddrs[j].IPPort() +} + +// SortIPAddrsBySpecificMaskLen is a type that satisfies sort.Interface and +// can be used by the routines in this package. The +// SortIPAddrsBySpecificMaskLen type is used to sort IPAddrs by smallest +// network (most specific to largest network). +type SortIPAddrsBySpecificMaskLen struct{ IPAddrs } + +// Less reports whether the element with index i should sort before the +// element with index j. +func (s SortIPAddrsBySpecificMaskLen) Less(i, j int) bool { + return s.IPAddrs[i].Maskbits() > s.IPAddrs[j].Maskbits() +} + +// SortIPAddrsByBroadMaskLen is a type that satisfies sort.Interface and can +// be used by the routines in this package. The SortIPAddrsByBroadMaskLen +// type is used to sort IPAddrs by largest network (i.e. largest subnets +// first). +type SortIPAddrsByBroadMaskLen struct{ IPAddrs } + +// Less reports whether the element with index i should sort before the +// element with index j. +func (s SortIPAddrsByBroadMaskLen) Less(i, j int) bool { + return s.IPAddrs[i].Maskbits() < s.IPAddrs[j].Maskbits() +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/ipv4addr.go b/vendor/github.com/hashicorp/go-sockaddr/ipv4addr.go new file mode 100644 index 0000000..4d395dc --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ipv4addr.go @@ -0,0 +1,516 @@ +package sockaddr + +import ( + "encoding/binary" + "fmt" + "net" + "regexp" + "strconv" + "strings" +) + +type ( + // IPv4Address is a named type representing an IPv4 address. + IPv4Address uint32 + + // IPv4Network is a named type representing an IPv4 network. + IPv4Network uint32 + + // IPv4Mask is a named type representing an IPv4 network mask. + IPv4Mask uint32 +) + +// IPv4HostMask is a constant represents a /32 IPv4 Address +// (i.e. 255.255.255.255). +const IPv4HostMask = IPv4Mask(0xffffffff) + +// ipv4AddrAttrMap is a map of the IPv4Addr type-specific attributes. +var ipv4AddrAttrMap map[AttrName]func(IPv4Addr) string +var ipv4AddrAttrs []AttrName +var trailingHexNetmaskRE *regexp.Regexp + +// IPv4Addr implements a convenience wrapper around the union of Go's +// built-in net.IP and net.IPNet types. In UNIX-speak, IPv4Addr implements +// `sockaddr` when the the address family is set to AF_INET +// (i.e. `sockaddr_in`). +type IPv4Addr struct { + IPAddr + Address IPv4Address + Mask IPv4Mask + Port IPPort +} + +func init() { + ipv4AddrInit() + trailingHexNetmaskRE = regexp.MustCompile(`/([0f]{8})$`) +} + +// NewIPv4Addr creates an IPv4Addr from a string. String can be in the form +// of either an IPv4:port (e.g. `1.2.3.4:80`, in which case the mask is +// assumed to be a `/32`), an IPv4 address (e.g. `1.2.3.4`, also with a `/32` +// mask), or an IPv4 CIDR (e.g. `1.2.3.4/24`, which has its IP port +// initialized to zero). ipv4Str can not be a hostname. +// +// NOTE: Many net.*() routines will initialize and return an IPv6 address. +// To create uint32 values from net.IP, always test to make sure the address +// returned can be converted to a 4 byte array using To4(). +func NewIPv4Addr(ipv4Str string) (IPv4Addr, error) { + // Strip off any bogus hex-encoded netmasks that will be mis-parsed by Go. In + // particular, clients with the Barracuda VPN client will see something like: + // `192.168.3.51/00ffffff` as their IP address. + trailingHexNetmaskRe := trailingHexNetmaskRE.Copy() + if match := trailingHexNetmaskRe.FindStringIndex(ipv4Str); match != nil { + ipv4Str = ipv4Str[:match[0]] + } + + // Parse as an IPv4 CIDR + ipAddr, network, err := net.ParseCIDR(ipv4Str) + if err == nil { + ipv4 := ipAddr.To4() + if ipv4 == nil { + return IPv4Addr{}, fmt.Errorf("Unable to convert %s to an IPv4 address", ipv4Str) + } + + // If we see an IPv6 netmask, convert it to an IPv4 mask. + netmaskSepPos := strings.LastIndexByte(ipv4Str, '/') + if netmaskSepPos != -1 && netmaskSepPos+1 < len(ipv4Str) { + netMask, err := strconv.ParseUint(ipv4Str[netmaskSepPos+1:], 10, 8) + if err != nil { + return IPv4Addr{}, fmt.Errorf("Unable to convert %s to an IPv4 address: unable to parse CIDR netmask: %v", ipv4Str, err) + } else if netMask > 128 { + return IPv4Addr{}, fmt.Errorf("Unable to convert %s to an IPv4 address: invalid CIDR netmask", ipv4Str) + } + + if netMask >= 96 { + // Convert the IPv6 netmask to an IPv4 netmask + network.Mask = net.CIDRMask(int(netMask-96), IPv4len*8) + } + } + ipv4Addr := IPv4Addr{ + Address: IPv4Address(binary.BigEndian.Uint32(ipv4)), + Mask: IPv4Mask(binary.BigEndian.Uint32(network.Mask)), + } + return ipv4Addr, nil + } + + // Attempt to parse ipv4Str as a /32 host with a port number. + tcpAddr, err := net.ResolveTCPAddr("tcp4", ipv4Str) + if err == nil { + ipv4 := tcpAddr.IP.To4() + if ipv4 == nil { + return IPv4Addr{}, fmt.Errorf("Unable to resolve %+q as an IPv4 address", ipv4Str) + } + + ipv4Uint32 := binary.BigEndian.Uint32(ipv4) + ipv4Addr := IPv4Addr{ + Address: IPv4Address(ipv4Uint32), + Mask: IPv4HostMask, + Port: IPPort(tcpAddr.Port), + } + + return ipv4Addr, nil + } + + // Parse as a naked IPv4 address + ip := net.ParseIP(ipv4Str) + if ip != nil { + ipv4 := ip.To4() + if ipv4 == nil { + return IPv4Addr{}, fmt.Errorf("Unable to string convert %+q to an IPv4 address", ipv4Str) + } + + ipv4Uint32 := binary.BigEndian.Uint32(ipv4) + ipv4Addr := IPv4Addr{ + Address: IPv4Address(ipv4Uint32), + Mask: IPv4HostMask, + } + return ipv4Addr, nil + } + + return IPv4Addr{}, fmt.Errorf("Unable to parse %+q to an IPv4 address: %v", ipv4Str, err) +} + +// AddressBinString returns a string with the IPv4Addr's Address represented +// as a sequence of '0' and '1' characters. This method is useful for +// debugging or by operators who want to inspect an address. +func (ipv4 IPv4Addr) AddressBinString() string { + return fmt.Sprintf("%032s", strconv.FormatUint(uint64(ipv4.Address), 2)) +} + +// AddressHexString returns a string with the IPv4Addr address represented as +// a sequence of hex characters. This method is useful for debugging or by +// operators who want to inspect an address. +func (ipv4 IPv4Addr) AddressHexString() string { + return fmt.Sprintf("%08s", strconv.FormatUint(uint64(ipv4.Address), 16)) +} + +// Broadcast is an IPv4Addr-only method that returns the broadcast address of +// the network. +// +// NOTE: IPv6 only supports multicast, so this method only exists for +// IPv4Addr. +func (ipv4 IPv4Addr) Broadcast() IPAddr { + // Nothing should listen on a broadcast address. + return IPv4Addr{ + Address: IPv4Address(ipv4.BroadcastAddress()), + Mask: IPv4HostMask, + } +} + +// BroadcastAddress returns a IPv4Network of the IPv4Addr's broadcast +// address. +func (ipv4 IPv4Addr) BroadcastAddress() IPv4Network { + return IPv4Network(uint32(ipv4.Address)&uint32(ipv4.Mask) | ^uint32(ipv4.Mask)) +} + +// CmpAddress follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because its address is lower than arg +// - 0 if the SockAddr arg is equal to the receiving IPv4Addr or the argument is +// of a different type. +// - 1 If the argument should sort first. +func (ipv4 IPv4Addr) CmpAddress(sa SockAddr) int { + ipv4b, ok := sa.(IPv4Addr) + if !ok { + return sortDeferDecision + } + + switch { + case ipv4.Address == ipv4b.Address: + return sortDeferDecision + case ipv4.Address < ipv4b.Address: + return sortReceiverBeforeArg + default: + return sortArgBeforeReceiver + } +} + +// CmpPort follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because its port is lower than arg +// - 0 if the SockAddr arg's port number is equal to the receiving IPv4Addr, +// regardless of type. +// - 1 If the argument should sort first. +func (ipv4 IPv4Addr) CmpPort(sa SockAddr) int { + var saPort IPPort + switch v := sa.(type) { + case IPv4Addr: + saPort = v.Port + case IPv6Addr: + saPort = v.Port + default: + return sortDeferDecision + } + + switch { + case ipv4.Port == saPort: + return sortDeferDecision + case ipv4.Port < saPort: + return sortReceiverBeforeArg + default: + return sortArgBeforeReceiver + } +} + +// CmpRFC follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because it belongs to the RFC and its +// arg does not +// - 0 if the receiver and arg both belong to the same RFC or neither do. +// - 1 If the arg belongs to the RFC but receiver does not. +func (ipv4 IPv4Addr) CmpRFC(rfcNum uint, sa SockAddr) int { + recvInRFC := IsRFC(rfcNum, ipv4) + ipv4b, ok := sa.(IPv4Addr) + if !ok { + // If the receiver is part of the desired RFC and the SockAddr + // argument is not, return -1 so that the receiver sorts before + // the non-IPv4 SockAddr. Conversely, if the receiver is not + // part of the RFC, punt on sorting and leave it for the next + // sorter. + if recvInRFC { + return sortReceiverBeforeArg + } else { + return sortDeferDecision + } + } + + argInRFC := IsRFC(rfcNum, ipv4b) + switch { + case (recvInRFC && argInRFC), (!recvInRFC && !argInRFC): + // If a and b both belong to the RFC, or neither belong to + // rfcNum, defer sorting to the next sorter. + return sortDeferDecision + case recvInRFC && !argInRFC: + return sortReceiverBeforeArg + default: + return sortArgBeforeReceiver + } +} + +// Contains returns true if the SockAddr is contained within the receiver. +func (ipv4 IPv4Addr) Contains(sa SockAddr) bool { + ipv4b, ok := sa.(IPv4Addr) + if !ok { + return false + } + + return ipv4.ContainsNetwork(ipv4b) +} + +// ContainsAddress returns true if the IPv4Address is contained within the +// receiver. +func (ipv4 IPv4Addr) ContainsAddress(x IPv4Address) bool { + return IPv4Address(ipv4.NetworkAddress()) <= x && + IPv4Address(ipv4.BroadcastAddress()) >= x +} + +// ContainsNetwork returns true if the network from IPv4Addr is contained +// within the receiver. +func (ipv4 IPv4Addr) ContainsNetwork(x IPv4Addr) bool { + return ipv4.NetworkAddress() <= x.NetworkAddress() && + ipv4.BroadcastAddress() >= x.BroadcastAddress() +} + +// DialPacketArgs returns the arguments required to be passed to +// net.DialUDP(). If the Mask of ipv4 is not a /32 or the Port is 0, +// DialPacketArgs() will fail. See Host() to create an IPv4Addr with its +// mask set to /32. +func (ipv4 IPv4Addr) DialPacketArgs() (network, dialArgs string) { + if ipv4.Mask != IPv4HostMask || ipv4.Port == 0 { + return "udp4", "" + } + return "udp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port) +} + +// DialStreamArgs returns the arguments required to be passed to +// net.DialTCP(). If the Mask of ipv4 is not a /32 or the Port is 0, +// DialStreamArgs() will fail. See Host() to create an IPv4Addr with its +// mask set to /32. +func (ipv4 IPv4Addr) DialStreamArgs() (network, dialArgs string) { + if ipv4.Mask != IPv4HostMask || ipv4.Port == 0 { + return "tcp4", "" + } + return "tcp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port) +} + +// Equal returns true if a SockAddr is equal to the receiving IPv4Addr. +func (ipv4 IPv4Addr) Equal(sa SockAddr) bool { + ipv4b, ok := sa.(IPv4Addr) + if !ok { + return false + } + + if ipv4.Port != ipv4b.Port { + return false + } + + if ipv4.Address != ipv4b.Address { + return false + } + + if ipv4.NetIPNet().String() != ipv4b.NetIPNet().String() { + return false + } + + return true +} + +// FirstUsable returns an IPv4Addr set to the first address following the +// network prefix. The first usable address in a network is normally the +// gateway and should not be used except by devices forwarding packets +// between two administratively distinct networks (i.e. a router). This +// function does not discriminate against first usable vs "first address that +// should be used." For example, FirstUsable() on "192.168.1.10/24" would +// return the address "192.168.1.1/24". +func (ipv4 IPv4Addr) FirstUsable() IPAddr { + addr := ipv4.NetworkAddress() + + // If /32, return the address itself. If /31 assume a point-to-point + // link and return the lower address. + if ipv4.Maskbits() < 31 { + addr++ + } + + return IPv4Addr{ + Address: IPv4Address(addr), + Mask: IPv4HostMask, + } +} + +// Host returns a copy of ipv4 with its mask set to /32 so that it can be +// used by DialPacketArgs(), DialStreamArgs(), ListenPacketArgs(), or +// ListenStreamArgs(). +func (ipv4 IPv4Addr) Host() IPAddr { + // Nothing should listen on a broadcast address. + return IPv4Addr{ + Address: ipv4.Address, + Mask: IPv4HostMask, + Port: ipv4.Port, + } +} + +// IPPort returns the Port number attached to the IPv4Addr +func (ipv4 IPv4Addr) IPPort() IPPort { + return ipv4.Port +} + +// LastUsable returns the last address before the broadcast address in a +// given network. +func (ipv4 IPv4Addr) LastUsable() IPAddr { + addr := ipv4.BroadcastAddress() + + // If /32, return the address itself. If /31 assume a point-to-point + // link and return the upper address. + if ipv4.Maskbits() < 31 { + addr-- + } + + return IPv4Addr{ + Address: IPv4Address(addr), + Mask: IPv4HostMask, + } +} + +// ListenPacketArgs returns the arguments required to be passed to +// net.ListenUDP(). If the Mask of ipv4 is not a /32, ListenPacketArgs() +// will fail. See Host() to create an IPv4Addr with its mask set to /32. +func (ipv4 IPv4Addr) ListenPacketArgs() (network, listenArgs string) { + if ipv4.Mask != IPv4HostMask { + return "udp4", "" + } + return "udp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port) +} + +// ListenStreamArgs returns the arguments required to be passed to +// net.ListenTCP(). If the Mask of ipv4 is not a /32, ListenStreamArgs() +// will fail. See Host() to create an IPv4Addr with its mask set to /32. +func (ipv4 IPv4Addr) ListenStreamArgs() (network, listenArgs string) { + if ipv4.Mask != IPv4HostMask { + return "tcp4", "" + } + return "tcp4", fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port) +} + +// Maskbits returns the number of network mask bits in a given IPv4Addr. For +// example, the Maskbits() of "192.168.1.1/24" would return 24. +func (ipv4 IPv4Addr) Maskbits() int { + mask := make(net.IPMask, IPv4len) + binary.BigEndian.PutUint32(mask, uint32(ipv4.Mask)) + maskOnes, _ := mask.Size() + return maskOnes +} + +// MustIPv4Addr is a helper method that must return an IPv4Addr or panic on +// invalid input. +func MustIPv4Addr(addr string) IPv4Addr { + ipv4, err := NewIPv4Addr(addr) + if err != nil { + panic(fmt.Sprintf("Unable to create an IPv4Addr from %+q: %v", addr, err)) + } + return ipv4 +} + +// NetIP returns the address as a net.IP (address is always presized to +// IPv4). +func (ipv4 IPv4Addr) NetIP() *net.IP { + x := make(net.IP, IPv4len) + binary.BigEndian.PutUint32(x, uint32(ipv4.Address)) + return &x +} + +// NetIPMask create a new net.IPMask from the IPv4Addr. +func (ipv4 IPv4Addr) NetIPMask() *net.IPMask { + ipv4Mask := net.IPMask{} + ipv4Mask = make(net.IPMask, IPv4len) + binary.BigEndian.PutUint32(ipv4Mask, uint32(ipv4.Mask)) + return &ipv4Mask +} + +// NetIPNet create a new net.IPNet from the IPv4Addr. +func (ipv4 IPv4Addr) NetIPNet() *net.IPNet { + ipv4net := &net.IPNet{} + ipv4net.IP = make(net.IP, IPv4len) + binary.BigEndian.PutUint32(ipv4net.IP, uint32(ipv4.NetworkAddress())) + ipv4net.Mask = *ipv4.NetIPMask() + return ipv4net +} + +// Network returns the network prefix or network address for a given network. +func (ipv4 IPv4Addr) Network() IPAddr { + return IPv4Addr{ + Address: IPv4Address(ipv4.NetworkAddress()), + Mask: ipv4.Mask, + } +} + +// NetworkAddress returns an IPv4Network of the IPv4Addr's network address. +func (ipv4 IPv4Addr) NetworkAddress() IPv4Network { + return IPv4Network(uint32(ipv4.Address) & uint32(ipv4.Mask)) +} + +// Octets returns a slice of the four octets in an IPv4Addr's Address. The +// order of the bytes is big endian. +func (ipv4 IPv4Addr) Octets() []int { + return []int{ + int(ipv4.Address >> 24), + int((ipv4.Address >> 16) & 0xff), + int((ipv4.Address >> 8) & 0xff), + int(ipv4.Address & 0xff), + } +} + +// String returns a string representation of the IPv4Addr +func (ipv4 IPv4Addr) String() string { + if ipv4.Port != 0 { + return fmt.Sprintf("%s:%d", ipv4.NetIP().String(), ipv4.Port) + } + + if ipv4.Maskbits() == 32 { + return ipv4.NetIP().String() + } + + return fmt.Sprintf("%s/%d", ipv4.NetIP().String(), ipv4.Maskbits()) +} + +// Type is used as a type switch and returns TypeIPv4 +func (IPv4Addr) Type() SockAddrType { + return TypeIPv4 +} + +// IPv4AddrAttr returns a string representation of an attribute for the given +// IPv4Addr. +func IPv4AddrAttr(ipv4 IPv4Addr, selector AttrName) string { + fn, found := ipv4AddrAttrMap[selector] + if !found { + return "" + } + + return fn(ipv4) +} + +// IPv4Attrs returns a list of attributes supported by the IPv4Addr type +func IPv4Attrs() []AttrName { + return ipv4AddrAttrs +} + +// ipv4AddrInit is called once at init() +func ipv4AddrInit() { + // Sorted for human readability + ipv4AddrAttrs = []AttrName{ + "size", // Same position as in IPv6 for output consistency + "broadcast", + "uint32", + } + + ipv4AddrAttrMap = map[AttrName]func(ipv4 IPv4Addr) string{ + "broadcast": func(ipv4 IPv4Addr) string { + return ipv4.Broadcast().String() + }, + "size": func(ipv4 IPv4Addr) string { + return fmt.Sprintf("%d", 1<<uint(IPv4len*8-ipv4.Maskbits())) + }, + "uint32": func(ipv4 IPv4Addr) string { + return fmt.Sprintf("%d", uint32(ipv4.Address)) + }, + } +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/ipv6addr.go b/vendor/github.com/hashicorp/go-sockaddr/ipv6addr.go new file mode 100644 index 0000000..d7f4121 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/ipv6addr.go @@ -0,0 +1,591 @@ +package sockaddr + +import ( + "bytes" + "encoding/binary" + "fmt" + "math/big" + "net" +) + +type ( + // IPv6Address is a named type representing an IPv6 address. + IPv6Address *big.Int + + // IPv6Network is a named type representing an IPv6 network. + IPv6Network *big.Int + + // IPv6Mask is a named type representing an IPv6 network mask. + IPv6Mask *big.Int +) + +// IPv6HostPrefix is a constant represents a /128 IPv6 Prefix. +const IPv6HostPrefix = IPPrefixLen(128) + +// ipv6HostMask is an unexported big.Int representing a /128 IPv6 address. +// This value must be a constant and always set to all ones. +var ipv6HostMask IPv6Mask + +// ipv6AddrAttrMap is a map of the IPv6Addr type-specific attributes. +var ipv6AddrAttrMap map[AttrName]func(IPv6Addr) string +var ipv6AddrAttrs []AttrName + +func init() { + biMask := new(big.Int) + biMask.SetBytes([]byte{ + 0xff, 0xff, + 0xff, 0xff, + 0xff, 0xff, + 0xff, 0xff, + 0xff, 0xff, + 0xff, 0xff, + 0xff, 0xff, + 0xff, 0xff, + }, + ) + ipv6HostMask = IPv6Mask(biMask) + + ipv6AddrInit() +} + +// IPv6Addr implements a convenience wrapper around the union of Go's +// built-in net.IP and net.IPNet types. In UNIX-speak, IPv6Addr implements +// `sockaddr` when the the address family is set to AF_INET6 +// (i.e. `sockaddr_in6`). +type IPv6Addr struct { + IPAddr + Address IPv6Address + Mask IPv6Mask + Port IPPort +} + +// NewIPv6Addr creates an IPv6Addr from a string. String can be in the form of +// an an IPv6:port (e.g. `[2001:4860:0:2001::68]:80`, in which case the mask is +// assumed to be a /128), an IPv6 address (e.g. `2001:4860:0:2001::68`, also +// with a `/128` mask), an IPv6 CIDR (e.g. `2001:4860:0:2001::68/64`, which has +// its IP port initialized to zero). ipv6Str can not be a hostname. +// +// NOTE: Many net.*() routines will initialize and return an IPv4 address. +// Always test to make sure the address returned cannot be converted to a 4 byte +// array using To4(). +func NewIPv6Addr(ipv6Str string) (IPv6Addr, error) { + v6Addr := false +LOOP: + for i := 0; i < len(ipv6Str); i++ { + switch ipv6Str[i] { + case '.': + break LOOP + case ':': + v6Addr = true + break LOOP + } + } + + if !v6Addr { + return IPv6Addr{}, fmt.Errorf("Unable to resolve %+q as an IPv6 address, appears to be an IPv4 address", ipv6Str) + } + + // Attempt to parse ipv6Str as a /128 host with a port number. + tcpAddr, err := net.ResolveTCPAddr("tcp6", ipv6Str) + if err == nil { + ipv6 := tcpAddr.IP.To16() + if ipv6 == nil { + return IPv6Addr{}, fmt.Errorf("Unable to resolve %+q as a 16byte IPv6 address", ipv6Str) + } + + ipv6BigIntAddr := new(big.Int) + ipv6BigIntAddr.SetBytes(ipv6) + + ipv6BigIntMask := new(big.Int) + ipv6BigIntMask.Set(ipv6HostMask) + + ipv6Addr := IPv6Addr{ + Address: IPv6Address(ipv6BigIntAddr), + Mask: IPv6Mask(ipv6BigIntMask), + Port: IPPort(tcpAddr.Port), + } + + return ipv6Addr, nil + } + + // Parse as a naked IPv6 address. Trim square brackets if present. + if len(ipv6Str) > 2 && ipv6Str[0] == '[' && ipv6Str[len(ipv6Str)-1] == ']' { + ipv6Str = ipv6Str[1 : len(ipv6Str)-1] + } + ip := net.ParseIP(ipv6Str) + if ip != nil { + ipv6 := ip.To16() + if ipv6 == nil { + return IPv6Addr{}, fmt.Errorf("Unable to string convert %+q to a 16byte IPv6 address", ipv6Str) + } + + ipv6BigIntAddr := new(big.Int) + ipv6BigIntAddr.SetBytes(ipv6) + + ipv6BigIntMask := new(big.Int) + ipv6BigIntMask.Set(ipv6HostMask) + + return IPv6Addr{ + Address: IPv6Address(ipv6BigIntAddr), + Mask: IPv6Mask(ipv6BigIntMask), + }, nil + } + + // Parse as an IPv6 CIDR + ipAddr, network, err := net.ParseCIDR(ipv6Str) + if err == nil { + ipv6 := ipAddr.To16() + if ipv6 == nil { + return IPv6Addr{}, fmt.Errorf("Unable to convert %+q to a 16byte IPv6 address", ipv6Str) + } + + ipv6BigIntAddr := new(big.Int) + ipv6BigIntAddr.SetBytes(ipv6) + + ipv6BigIntMask := new(big.Int) + ipv6BigIntMask.SetBytes(network.Mask) + + ipv6Addr := IPv6Addr{ + Address: IPv6Address(ipv6BigIntAddr), + Mask: IPv6Mask(ipv6BigIntMask), + } + return ipv6Addr, nil + } + + return IPv6Addr{}, fmt.Errorf("Unable to parse %+q to an IPv6 address: %v", ipv6Str, err) +} + +// AddressBinString returns a string with the IPv6Addr's Address represented +// as a sequence of '0' and '1' characters. This method is useful for +// debugging or by operators who want to inspect an address. +func (ipv6 IPv6Addr) AddressBinString() string { + bi := big.Int(*ipv6.Address) + return fmt.Sprintf("%0128s", bi.Text(2)) +} + +// AddressHexString returns a string with the IPv6Addr address represented as +// a sequence of hex characters. This method is useful for debugging or by +// operators who want to inspect an address. +func (ipv6 IPv6Addr) AddressHexString() string { + bi := big.Int(*ipv6.Address) + return fmt.Sprintf("%032s", bi.Text(16)) +} + +// CmpAddress follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because its address is lower than arg +// - 0 if the SockAddr arg equal to the receiving IPv6Addr or the argument is of a +// different type. +// - 1 If the argument should sort first. +func (ipv6 IPv6Addr) CmpAddress(sa SockAddr) int { + ipv6b, ok := sa.(IPv6Addr) + if !ok { + return sortDeferDecision + } + + ipv6aBigInt := new(big.Int) + ipv6aBigInt.Set(ipv6.Address) + ipv6bBigInt := new(big.Int) + ipv6bBigInt.Set(ipv6b.Address) + + return ipv6aBigInt.Cmp(ipv6bBigInt) +} + +// CmpPort follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because its port is lower than arg +// - 0 if the SockAddr arg's port number is equal to the receiving IPv6Addr, +// regardless of type. +// - 1 If the argument should sort first. +func (ipv6 IPv6Addr) CmpPort(sa SockAddr) int { + var saPort IPPort + switch v := sa.(type) { + case IPv4Addr: + saPort = v.Port + case IPv6Addr: + saPort = v.Port + default: + return sortDeferDecision + } + + switch { + case ipv6.Port == saPort: + return sortDeferDecision + case ipv6.Port < saPort: + return sortReceiverBeforeArg + default: + return sortArgBeforeReceiver + } +} + +// CmpRFC follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because it belongs to the RFC and its +// arg does not +// - 0 if the receiver and arg both belong to the same RFC or neither do. +// - 1 If the arg belongs to the RFC but receiver does not. +func (ipv6 IPv6Addr) CmpRFC(rfcNum uint, sa SockAddr) int { + recvInRFC := IsRFC(rfcNum, ipv6) + ipv6b, ok := sa.(IPv6Addr) + if !ok { + // If the receiver is part of the desired RFC and the SockAddr + // argument is not, sort receiver before the non-IPv6 SockAddr. + // Conversely, if the receiver is not part of the RFC, punt on + // sorting and leave it for the next sorter. + if recvInRFC { + return sortReceiverBeforeArg + } else { + return sortDeferDecision + } + } + + argInRFC := IsRFC(rfcNum, ipv6b) + switch { + case (recvInRFC && argInRFC), (!recvInRFC && !argInRFC): + // If a and b both belong to the RFC, or neither belong to + // rfcNum, defer sorting to the next sorter. + return sortDeferDecision + case recvInRFC && !argInRFC: + return sortReceiverBeforeArg + default: + return sortArgBeforeReceiver + } +} + +// Contains returns true if the SockAddr is contained within the receiver. +func (ipv6 IPv6Addr) Contains(sa SockAddr) bool { + ipv6b, ok := sa.(IPv6Addr) + if !ok { + return false + } + + return ipv6.ContainsNetwork(ipv6b) +} + +// ContainsAddress returns true if the IPv6Address is contained within the +// receiver. +func (ipv6 IPv6Addr) ContainsAddress(x IPv6Address) bool { + xAddr := IPv6Addr{ + Address: x, + Mask: ipv6HostMask, + } + + { + xIPv6 := xAddr.FirstUsable().(IPv6Addr) + yIPv6 := ipv6.FirstUsable().(IPv6Addr) + if xIPv6.CmpAddress(yIPv6) >= 1 { + return false + } + } + + { + xIPv6 := xAddr.LastUsable().(IPv6Addr) + yIPv6 := ipv6.LastUsable().(IPv6Addr) + if xIPv6.CmpAddress(yIPv6) <= -1 { + return false + } + } + return true +} + +// ContainsNetwork returns true if the network from IPv6Addr is contained within +// the receiver. +func (x IPv6Addr) ContainsNetwork(y IPv6Addr) bool { + { + xIPv6 := x.FirstUsable().(IPv6Addr) + yIPv6 := y.FirstUsable().(IPv6Addr) + if ret := xIPv6.CmpAddress(yIPv6); ret >= 1 { + return false + } + } + + { + xIPv6 := x.LastUsable().(IPv6Addr) + yIPv6 := y.LastUsable().(IPv6Addr) + if ret := xIPv6.CmpAddress(yIPv6); ret <= -1 { + return false + } + } + return true +} + +// DialPacketArgs returns the arguments required to be passed to +// net.DialUDP(). If the Mask of ipv6 is not a /128 or the Port is 0, +// DialPacketArgs() will fail. See Host() to create an IPv6Addr with its +// mask set to /128. +func (ipv6 IPv6Addr) DialPacketArgs() (network, dialArgs string) { + ipv6Mask := big.Int(*ipv6.Mask) + if ipv6Mask.Cmp(ipv6HostMask) != 0 || ipv6.Port == 0 { + return "udp6", "" + } + return "udp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port) +} + +// DialStreamArgs returns the arguments required to be passed to +// net.DialTCP(). If the Mask of ipv6 is not a /128 or the Port is 0, +// DialStreamArgs() will fail. See Host() to create an IPv6Addr with its +// mask set to /128. +func (ipv6 IPv6Addr) DialStreamArgs() (network, dialArgs string) { + ipv6Mask := big.Int(*ipv6.Mask) + if ipv6Mask.Cmp(ipv6HostMask) != 0 || ipv6.Port == 0 { + return "tcp6", "" + } + return "tcp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port) +} + +// Equal returns true if a SockAddr is equal to the receiving IPv4Addr. +func (ipv6a IPv6Addr) Equal(sa SockAddr) bool { + ipv6b, ok := sa.(IPv6Addr) + if !ok { + return false + } + + if ipv6a.NetIP().String() != ipv6b.NetIP().String() { + return false + } + + if ipv6a.NetIPNet().String() != ipv6b.NetIPNet().String() { + return false + } + + if ipv6a.Port != ipv6b.Port { + return false + } + + return true +} + +// FirstUsable returns an IPv6Addr set to the first address following the +// network prefix. The first usable address in a network is normally the +// gateway and should not be used except by devices forwarding packets +// between two administratively distinct networks (i.e. a router). This +// function does not discriminate against first usable vs "first address that +// should be used." For example, FirstUsable() on "2001:0db8::0003/64" would +// return "2001:0db8::00011". +func (ipv6 IPv6Addr) FirstUsable() IPAddr { + return IPv6Addr{ + Address: IPv6Address(ipv6.NetworkAddress()), + Mask: ipv6HostMask, + } +} + +// Host returns a copy of ipv6 with its mask set to /128 so that it can be +// used by DialPacketArgs(), DialStreamArgs(), ListenPacketArgs(), or +// ListenStreamArgs(). +func (ipv6 IPv6Addr) Host() IPAddr { + // Nothing should listen on a broadcast address. + return IPv6Addr{ + Address: ipv6.Address, + Mask: ipv6HostMask, + Port: ipv6.Port, + } +} + +// IPPort returns the Port number attached to the IPv6Addr +func (ipv6 IPv6Addr) IPPort() IPPort { + return ipv6.Port +} + +// LastUsable returns the last address in a given network. +func (ipv6 IPv6Addr) LastUsable() IPAddr { + addr := new(big.Int) + addr.Set(ipv6.Address) + + mask := new(big.Int) + mask.Set(ipv6.Mask) + + negMask := new(big.Int) + negMask.Xor(ipv6HostMask, mask) + + lastAddr := new(big.Int) + lastAddr.And(addr, mask) + lastAddr.Or(lastAddr, negMask) + + return IPv6Addr{ + Address: IPv6Address(lastAddr), + Mask: ipv6HostMask, + } +} + +// ListenPacketArgs returns the arguments required to be passed to +// net.ListenUDP(). If the Mask of ipv6 is not a /128, ListenPacketArgs() +// will fail. See Host() to create an IPv6Addr with its mask set to /128. +func (ipv6 IPv6Addr) ListenPacketArgs() (network, listenArgs string) { + ipv6Mask := big.Int(*ipv6.Mask) + if ipv6Mask.Cmp(ipv6HostMask) != 0 { + return "udp6", "" + } + return "udp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port) +} + +// ListenStreamArgs returns the arguments required to be passed to +// net.ListenTCP(). If the Mask of ipv6 is not a /128, ListenStreamArgs() +// will fail. See Host() to create an IPv6Addr with its mask set to /128. +func (ipv6 IPv6Addr) ListenStreamArgs() (network, listenArgs string) { + ipv6Mask := big.Int(*ipv6.Mask) + if ipv6Mask.Cmp(ipv6HostMask) != 0 { + return "tcp6", "" + } + return "tcp6", fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port) +} + +// Maskbits returns the number of network mask bits in a given IPv6Addr. For +// example, the Maskbits() of "2001:0db8::0003/64" would return 64. +func (ipv6 IPv6Addr) Maskbits() int { + maskOnes, _ := ipv6.NetIPNet().Mask.Size() + + return maskOnes +} + +// MustIPv6Addr is a helper method that must return an IPv6Addr or panic on +// invalid input. +func MustIPv6Addr(addr string) IPv6Addr { + ipv6, err := NewIPv6Addr(addr) + if err != nil { + panic(fmt.Sprintf("Unable to create an IPv6Addr from %+q: %v", addr, err)) + } + return ipv6 +} + +// NetIP returns the address as a net.IP. +func (ipv6 IPv6Addr) NetIP() *net.IP { + return bigIntToNetIPv6(ipv6.Address) +} + +// NetIPMask create a new net.IPMask from the IPv6Addr. +func (ipv6 IPv6Addr) NetIPMask() *net.IPMask { + ipv6Mask := make(net.IPMask, IPv6len) + m := big.Int(*ipv6.Mask) + copy(ipv6Mask, m.Bytes()) + return &ipv6Mask +} + +// Network returns a pointer to the net.IPNet within IPv4Addr receiver. +func (ipv6 IPv6Addr) NetIPNet() *net.IPNet { + ipv6net := &net.IPNet{} + ipv6net.IP = make(net.IP, IPv6len) + copy(ipv6net.IP, *ipv6.NetIP()) + ipv6net.Mask = *ipv6.NetIPMask() + return ipv6net +} + +// Network returns the network prefix or network address for a given network. +func (ipv6 IPv6Addr) Network() IPAddr { + return IPv6Addr{ + Address: IPv6Address(ipv6.NetworkAddress()), + Mask: ipv6.Mask, + } +} + +// NetworkAddress returns an IPv6Network of the IPv6Addr's network address. +func (ipv6 IPv6Addr) NetworkAddress() IPv6Network { + addr := new(big.Int) + addr.SetBytes((*ipv6.Address).Bytes()) + + mask := new(big.Int) + mask.SetBytes(*ipv6.NetIPMask()) + + netAddr := new(big.Int) + netAddr.And(addr, mask) + + return IPv6Network(netAddr) +} + +// Octets returns a slice of the 16 octets in an IPv6Addr's Address. The +// order of the bytes is big endian. +func (ipv6 IPv6Addr) Octets() []int { + x := make([]int, IPv6len) + for i, b := range *bigIntToNetIPv6(ipv6.Address) { + x[i] = int(b) + } + + return x +} + +// String returns a string representation of the IPv6Addr +func (ipv6 IPv6Addr) String() string { + if ipv6.Port != 0 { + return fmt.Sprintf("[%s]:%d", ipv6.NetIP().String(), ipv6.Port) + } + + if ipv6.Maskbits() == 128 { + return ipv6.NetIP().String() + } + + return fmt.Sprintf("%s/%d", ipv6.NetIP().String(), ipv6.Maskbits()) +} + +// Type is used as a type switch and returns TypeIPv6 +func (IPv6Addr) Type() SockAddrType { + return TypeIPv6 +} + +// IPv6Attrs returns a list of attributes supported by the IPv6Addr type +func IPv6Attrs() []AttrName { + return ipv6AddrAttrs +} + +// IPv6AddrAttr returns a string representation of an attribute for the given +// IPv6Addr. +func IPv6AddrAttr(ipv6 IPv6Addr, selector AttrName) string { + fn, found := ipv6AddrAttrMap[selector] + if !found { + return "" + } + + return fn(ipv6) +} + +// ipv6AddrInit is called once at init() +func ipv6AddrInit() { + // Sorted for human readability + ipv6AddrAttrs = []AttrName{ + "size", // Same position as in IPv6 for output consistency + "uint128", + } + + ipv6AddrAttrMap = map[AttrName]func(ipv6 IPv6Addr) string{ + "size": func(ipv6 IPv6Addr) string { + netSize := big.NewInt(1) + netSize = netSize.Lsh(netSize, uint(IPv6len*8-ipv6.Maskbits())) + return netSize.Text(10) + }, + "uint128": func(ipv6 IPv6Addr) string { + b := big.Int(*ipv6.Address) + return b.Text(10) + }, + } +} + +// bigIntToNetIPv6 is a helper function that correctly returns a net.IP with the +// correctly padded values. +func bigIntToNetIPv6(bi *big.Int) *net.IP { + x := make(net.IP, IPv6len) + ipv6Bytes := bi.Bytes() + + // It's possibe for ipv6Bytes to be less than IPv6len bytes in size. If + // they are different sizes we to pad the size of response. + if len(ipv6Bytes) < IPv6len { + buf := new(bytes.Buffer) + buf.Grow(IPv6len) + + for i := len(ipv6Bytes); i < IPv6len; i++ { + if err := binary.Write(buf, binary.BigEndian, byte(0)); err != nil { + panic(fmt.Sprintf("Unable to pad byte %d of input %v: %v", i, bi, err)) + } + } + + for _, b := range ipv6Bytes { + if err := binary.Write(buf, binary.BigEndian, b); err != nil { + panic(fmt.Sprintf("Unable to preserve endianness of input %v: %v", bi, err)) + } + } + + ipv6Bytes = buf.Bytes() + } + i := copy(x, ipv6Bytes) + if i != IPv6len { + panic("IPv6 wrong size") + } + return &x +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/rfc.go b/vendor/github.com/hashicorp/go-sockaddr/rfc.go new file mode 100644 index 0000000..02e188f --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/rfc.go @@ -0,0 +1,948 @@ +package sockaddr + +// ForwardingBlacklist is a faux RFC that includes a list of non-forwardable IP +// blocks. +const ForwardingBlacklist = 4294967295 +const ForwardingBlacklistRFC = "4294967295" + +// IsRFC tests to see if an SockAddr matches the specified RFC +func IsRFC(rfcNum uint, sa SockAddr) bool { + rfcNetMap := KnownRFCs() + rfcNets, ok := rfcNetMap[rfcNum] + if !ok { + return false + } + + var contained bool + for _, rfcNet := range rfcNets { + if rfcNet.Contains(sa) { + contained = true + break + } + } + return contained +} + +// KnownRFCs returns an initial set of known RFCs. +// +// NOTE (sean@): As this list evolves over time, please submit patches to keep +// this list current. If something isn't right, inquire, as it may just be a +// bug on my part. Some of the inclusions were based on my judgement as to what +// would be a useful value (e.g. RFC3330). +// +// Useful resources: +// +// * https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml +// * https://www.iana.org/assignments/ipv6-unicast-address-assignments/ipv6-unicast-address-assignments.xhtml +// * https://www.iana.org/assignments/ipv6-address-space/ipv6-address-space.xhtml +func KnownRFCs() map[uint]SockAddrs { + // NOTE(sean@): Multiple SockAddrs per RFC lend themselves well to a + // RADIX tree, but `ENOTIME`. Patches welcome. + return map[uint]SockAddrs{ + 919: { + // [RFC919] Broadcasting Internet Datagrams + MustIPv4Addr("255.255.255.255/32"), // [RFC1122], ยง7 Broadcast IP Addressing - Proposed Standards + }, + 1122: { + // [RFC1122] Requirements for Internet Hosts -- Communication Layers + MustIPv4Addr("0.0.0.0/8"), // [RFC1122], ยง3.2.1.3 + MustIPv4Addr("127.0.0.0/8"), // [RFC1122], ยง3.2.1.3 + }, + 1112: { + // [RFC1112] Host Extensions for IP Multicasting + MustIPv4Addr("224.0.0.0/4"), // [RFC1112], ยง4 Host Group Addresses + }, + 1918: { + // [RFC1918] Address Allocation for Private Internets + MustIPv4Addr("10.0.0.0/8"), + MustIPv4Addr("172.16.0.0/12"), + MustIPv4Addr("192.168.0.0/16"), + }, + 2544: { + // [RFC2544] Benchmarking Methodology for Network + // Interconnect Devices + MustIPv4Addr("198.18.0.0/15"), + }, + 2765: { + // [RFC2765] Stateless IP/ICMP Translation Algorithm + // (SIIT) (obsoleted by RFCs 6145, which itself was + // later obsoleted by 7915). + + // [RFC2765], ยง2.1 Addresses + MustIPv6Addr("0:0:0:0:0:ffff:0:0/96"), + }, + 2928: { + // [RFC2928] Initial IPv6 Sub-TLA ID Assignments + MustIPv6Addr("2001::/16"), // Superblock + //MustIPv6Addr("2001:0000::/23"), // IANA + //MustIPv6Addr("2001:0200::/23"), // APNIC + //MustIPv6Addr("2001:0400::/23"), // ARIN + //MustIPv6Addr("2001:0600::/23"), // RIPE NCC + //MustIPv6Addr("2001:0800::/23"), // (future assignment) + // ... + //MustIPv6Addr("2001:FE00::/23"), // (future assignment) + }, + 3056: { // 6to4 address + // [RFC3056] Connection of IPv6 Domains via IPv4 Clouds + + // [RFC3056], ยง2 IPv6 Prefix Allocation + MustIPv6Addr("2002::/16"), + }, + 3068: { + // [RFC3068] An Anycast Prefix for 6to4 Relay Routers + // (obsolete by RFC7526) + + // [RFC3068], ยง 6to4 Relay anycast address + MustIPv4Addr("192.88.99.0/24"), + + // [RFC3068], ยง2.5 6to4 IPv6 relay anycast address + // + // NOTE: /120 == 128-(32-24) + MustIPv6Addr("2002:c058:6301::/120"), + }, + 3171: { + // [RFC3171] IANA Guidelines for IPv4 Multicast Address Assignments + MustIPv4Addr("224.0.0.0/4"), + }, + 3330: { + // [RFC3330] Special-Use IPv4 Addresses + + // Addresses in this block refer to source hosts on + // "this" network. Address 0.0.0.0/32 may be used as a + // source address for this host on this network; other + // addresses within 0.0.0.0/8 may be used to refer to + // specified hosts on this network [RFC1700, page 4]. + MustIPv4Addr("0.0.0.0/8"), + + // 10.0.0.0/8 - This block is set aside for use in + // private networks. Its intended use is documented in + // [RFC1918]. Addresses within this block should not + // appear on the public Internet. + MustIPv4Addr("10.0.0.0/8"), + + // 14.0.0.0/8 - This block is set aside for assignments + // to the international system of Public Data Networks + // [RFC1700, page 181]. The registry of assignments + // within this block can be accessed from the "Public + // Data Network Numbers" link on the web page at + // http://www.iana.org/numbers.html. Addresses within + // this block are assigned to users and should be + // treated as such. + + // 24.0.0.0/8 - This block was allocated in early 1996 + // for use in provisioning IP service over cable + // television systems. Although the IANA initially was + // involved in making assignments to cable operators, + // this responsibility was transferred to American + // Registry for Internet Numbers (ARIN) in May 2001. + // Addresses within this block are assigned in the + // normal manner and should be treated as such. + + // 39.0.0.0/8 - This block was used in the "Class A + // Subnet Experiment" that commenced in May 1995, as + // documented in [RFC1797]. The experiment has been + // completed and this block has been returned to the + // pool of addresses reserved for future allocation or + // assignment. This block therefore no longer has a + // special use and is subject to allocation to a + // Regional Internet Registry for assignment in the + // normal manner. + + // 127.0.0.0/8 - This block is assigned for use as the Internet host + // loopback address. A datagram sent by a higher level protocol to an + // address anywhere within this block should loop back inside the host. + // This is ordinarily implemented using only 127.0.0.1/32 for loopback, + // but no addresses within this block should ever appear on any network + // anywhere [RFC1700, page 5]. + MustIPv4Addr("127.0.0.0/8"), + + // 128.0.0.0/16 - This block, corresponding to the + // numerically lowest of the former Class B addresses, + // was initially and is still reserved by the IANA. + // Given the present classless nature of the IP address + // space, the basis for the reservation no longer + // applies and addresses in this block are subject to + // future allocation to a Regional Internet Registry for + // assignment in the normal manner. + + // 169.254.0.0/16 - This is the "link local" block. It + // is allocated for communication between hosts on a + // single link. Hosts obtain these addresses by + // auto-configuration, such as when a DHCP server may + // not be found. + MustIPv4Addr("169.254.0.0/16"), + + // 172.16.0.0/12 - This block is set aside for use in + // private networks. Its intended use is documented in + // [RFC1918]. Addresses within this block should not + // appear on the public Internet. + MustIPv4Addr("172.16.0.0/12"), + + // 191.255.0.0/16 - This block, corresponding to the numerically highest + // to the former Class B addresses, was initially and is still reserved + // by the IANA. Given the present classless nature of the IP address + // space, the basis for the reservation no longer applies and addresses + // in this block are subject to future allocation to a Regional Internet + // Registry for assignment in the normal manner. + + // 192.0.0.0/24 - This block, corresponding to the + // numerically lowest of the former Class C addresses, + // was initially and is still reserved by the IANA. + // Given the present classless nature of the IP address + // space, the basis for the reservation no longer + // applies and addresses in this block are subject to + // future allocation to a Regional Internet Registry for + // assignment in the normal manner. + + // 192.0.2.0/24 - This block is assigned as "TEST-NET" for use in + // documentation and example code. It is often used in conjunction with + // domain names example.com or example.net in vendor and protocol + // documentation. Addresses within this block should not appear on the + // public Internet. + MustIPv4Addr("192.0.2.0/24"), + + // 192.88.99.0/24 - This block is allocated for use as 6to4 relay + // anycast addresses, according to [RFC3068]. + MustIPv4Addr("192.88.99.0/24"), + + // 192.168.0.0/16 - This block is set aside for use in private networks. + // Its intended use is documented in [RFC1918]. Addresses within this + // block should not appear on the public Internet. + MustIPv4Addr("192.168.0.0/16"), + + // 198.18.0.0/15 - This block has been allocated for use + // in benchmark tests of network interconnect devices. + // Its use is documented in [RFC2544]. + MustIPv4Addr("198.18.0.0/15"), + + // 223.255.255.0/24 - This block, corresponding to the + // numerically highest of the former Class C addresses, + // was initially and is still reserved by the IANA. + // Given the present classless nature of the IP address + // space, the basis for the reservation no longer + // applies and addresses in this block are subject to + // future allocation to a Regional Internet Registry for + // assignment in the normal manner. + + // 224.0.0.0/4 - This block, formerly known as the Class + // D address space, is allocated for use in IPv4 + // multicast address assignments. The IANA guidelines + // for assignments from this space are described in + // [RFC3171]. + MustIPv4Addr("224.0.0.0/4"), + + // 240.0.0.0/4 - This block, formerly known as the Class E address + // space, is reserved. The "limited broadcast" destination address + // 255.255.255.255 should never be forwarded outside the (sub-)net of + // the source. The remainder of this space is reserved + // for future use. [RFC1700, page 4] + MustIPv4Addr("240.0.0.0/4"), + }, + 3849: { + // [RFC3849] IPv6 Address Prefix Reserved for Documentation + MustIPv6Addr("2001:db8::/32"), // [RFC3849], ยง4 IANA Considerations + }, + 3927: { + // [RFC3927] Dynamic Configuration of IPv4 Link-Local Addresses + MustIPv4Addr("169.254.0.0/16"), // [RFC3927], ยง2.1 Link-Local Address Selection + }, + 4038: { + // [RFC4038] Application Aspects of IPv6 Transition + + // [RFC4038], ยง4.2. IPv6 Applications in a Dual-Stack Node + MustIPv6Addr("0:0:0:0:0:ffff::/96"), + }, + 4193: { + // [RFC4193] Unique Local IPv6 Unicast Addresses + MustIPv6Addr("fc00::/7"), + }, + 4291: { + // [RFC4291] IP Version 6 Addressing Architecture + + // [RFC4291], ยง2.5.2 The Unspecified Address + MustIPv6Addr("::/128"), + + // [RFC4291], ยง2.5.3 The Loopback Address + MustIPv6Addr("::1/128"), + + // [RFC4291], ยง2.5.5.1. IPv4-Compatible IPv6 Address + MustIPv6Addr("::/96"), + + // [RFC4291], ยง2.5.5.2. IPv4-Mapped IPv6 Address + MustIPv6Addr("::ffff:0:0/96"), + + // [RFC4291], ยง2.5.6 Link-Local IPv6 Unicast Addresses + MustIPv6Addr("fe80::/10"), + + // [RFC4291], ยง2.5.7 Site-Local IPv6 Unicast Addresses + // (depreciated) + MustIPv6Addr("fec0::/10"), + + // [RFC4291], ยง2.7 Multicast Addresses + MustIPv6Addr("ff00::/8"), + + // IPv6 Multicast Information. + // + // In the following "table" below, `ff0x` is replaced + // with the following values depending on the scope of + // the query: + // + // IPv6 Multicast Scopes: + // * ff00/9 // reserved + // * ff01/9 // interface-local + // * ff02/9 // link-local + // * ff03/9 // realm-local + // * ff04/9 // admin-local + // * ff05/9 // site-local + // * ff08/9 // organization-local + // * ff0e/9 // global + // * ff0f/9 // reserved + // + // IPv6 Multicast Addresses: + // * ff0x::2 // All routers + // * ff02::5 // OSPFIGP + // * ff02::6 // OSPFIGP Designated Routers + // * ff02::9 // RIP Routers + // * ff02::a // EIGRP Routers + // * ff02::d // All PIM Routers + // * ff02::1a // All RPL Routers + // * ff0x::fb // mDNSv6 + // * ff0x::101 // All Network Time Protocol (NTP) servers + // * ff02::1:1 // Link Name + // * ff02::1:2 // All-dhcp-agents + // * ff02::1:3 // Link-local Multicast Name Resolution + // * ff05::1:3 // All-dhcp-servers + // * ff02::1:ff00:0/104 // Solicited-node multicast address. + // * ff02::2:ff00:0/104 // Node Information Queries + }, + 4380: { + // [RFC4380] Teredo: Tunneling IPv6 over UDP through + // Network Address Translations (NATs) + + // [RFC4380], ยง2.6 Global Teredo IPv6 Service Prefix + MustIPv6Addr("2001:0000::/32"), + }, + 4773: { + // [RFC4773] Administration of the IANA Special Purpose IPv6 Address Block + MustIPv6Addr("2001:0000::/23"), // IANA + }, + 4843: { + // [RFC4843] An IPv6 Prefix for Overlay Routable Cryptographic Hash Identifiers (ORCHID) + MustIPv6Addr("2001:10::/28"), // [RFC4843], ยง7 IANA Considerations + }, + 5180: { + // [RFC5180] IPv6 Benchmarking Methodology for Network Interconnect Devices + MustIPv6Addr("2001:0200::/48"), // [RFC5180], ยง8 IANA Considerations + }, + 5735: { + // [RFC5735] Special Use IPv4 Addresses + MustIPv4Addr("192.0.2.0/24"), // TEST-NET-1 + MustIPv4Addr("198.51.100.0/24"), // TEST-NET-2 + MustIPv4Addr("203.0.113.0/24"), // TEST-NET-3 + MustIPv4Addr("198.18.0.0/15"), // Benchmarks + }, + 5737: { + // [RFC5737] IPv4 Address Blocks Reserved for Documentation + MustIPv4Addr("192.0.2.0/24"), // TEST-NET-1 + MustIPv4Addr("198.51.100.0/24"), // TEST-NET-2 + MustIPv4Addr("203.0.113.0/24"), // TEST-NET-3 + }, + 6052: { + // [RFC6052] IPv6 Addressing of IPv4/IPv6 Translators + MustIPv6Addr("64:ff9b::/96"), // [RFC6052], ยง2.1. Well-Known Prefix + }, + 6333: { + // [RFC6333] Dual-Stack Lite Broadband Deployments Following IPv4 Exhaustion + MustIPv4Addr("192.0.0.0/29"), // [RFC6333], ยง5.7 Well-Known IPv4 Address + }, + 6598: { + // [RFC6598] IANA-Reserved IPv4 Prefix for Shared Address Space + MustIPv4Addr("100.64.0.0/10"), + }, + 6666: { + // [RFC6666] A Discard Prefix for IPv6 + MustIPv6Addr("0100::/64"), + }, + 6890: { + // [RFC6890] Special-Purpose IP Address Registries + + // From "RFC6890 ยง2.2.1 Information Requirements": + /* + The IPv4 and IPv6 Special-Purpose Address Registries maintain the + following information regarding each entry: + + o Address Block - A block of IPv4 or IPv6 addresses that has been + registered for a special purpose. + + o Name - A descriptive name for the special-purpose address block. + + o RFC - The RFC through which the special-purpose address block was + requested. + + o Allocation Date - The date upon which the special-purpose address + block was allocated. + + o Termination Date - The date upon which the allocation is to be + terminated. This field is applicable for limited-use allocations + only. + + o Source - A boolean value indicating whether an address from the + allocated special-purpose address block is valid when used as the + source address of an IP datagram that transits two devices. + + o Destination - A boolean value indicating whether an address from + the allocated special-purpose address block is valid when used as + the destination address of an IP datagram that transits two + devices. + + o Forwardable - A boolean value indicating whether a router may + forward an IP datagram whose destination address is drawn from the + allocated special-purpose address block between external + interfaces. + + o Global - A boolean value indicating whether an IP datagram whose + destination address is drawn from the allocated special-purpose + address block is forwardable beyond a specified administrative + domain. + + o Reserved-by-Protocol - A boolean value indicating whether the + special-purpose address block is reserved by IP, itself. This + value is "TRUE" if the RFC that created the special-purpose + address block requires all compliant IP implementations to behave + in a special way when processing packets either to or from + addresses contained by the address block. + + If the value of "Destination" is FALSE, the values of "Forwardable" + and "Global" must also be false. + */ + + /*+----------------------+----------------------------+ + * | Attribute | Value | + * +----------------------+----------------------------+ + * | Address Block | 0.0.0.0/8 | + * | Name | "This host on this network"| + * | RFC | [RFC1122], Section 3.2.1.3 | + * | Allocation Date | September 1981 | + * | Termination Date | N/A | + * | Source | True | + * | Destination | False | + * | Forwardable | False | + * | Global | False | + * | Reserved-by-Protocol | True | + * +----------------------+----------------------------+*/ + MustIPv4Addr("0.0.0.0/8"), + + /*+----------------------+---------------+ + * | Attribute | Value | + * +----------------------+---------------+ + * | Address Block | 10.0.0.0/8 | + * | Name | Private-Use | + * | RFC | [RFC1918] | + * | Allocation Date | February 1996 | + * | Termination Date | N/A | + * | Source | True | + * | Destination | True | + * | Forwardable | True | + * | Global | False | + * | Reserved-by-Protocol | False | + * +----------------------+---------------+ */ + MustIPv4Addr("10.0.0.0/8"), + + /*+----------------------+----------------------+ + | Attribute | Value | + +----------------------+----------------------+ + | Address Block | 100.64.0.0/10 | + | Name | Shared Address Space | + | RFC | [RFC6598] | + | Allocation Date | April 2012 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------------+*/ + MustIPv4Addr("100.64.0.0/10"), + + /*+----------------------+----------------------------+ + | Attribute | Value | + +----------------------+----------------------------+ + | Address Block | 127.0.0.0/8 | + | Name | Loopback | + | RFC | [RFC1122], Section 3.2.1.3 | + | Allocation Date | September 1981 | + | Termination Date | N/A | + | Source | False [1] | + | Destination | False [1] | + | Forwardable | False [1] | + | Global | False [1] | + | Reserved-by-Protocol | True | + +----------------------+----------------------------+*/ + // [1] Several protocols have been granted exceptions to + // this rule. For examples, see [RFC4379] and + // [RFC5884]. + MustIPv4Addr("127.0.0.0/8"), + + /*+----------------------+----------------+ + | Attribute | Value | + +----------------------+----------------+ + | Address Block | 169.254.0.0/16 | + | Name | Link Local | + | RFC | [RFC3927] | + | Allocation Date | May 2005 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | True | + +----------------------+----------------+*/ + MustIPv4Addr("169.254.0.0/16"), + + /*+----------------------+---------------+ + | Attribute | Value | + +----------------------+---------------+ + | Address Block | 172.16.0.0/12 | + | Name | Private-Use | + | RFC | [RFC1918] | + | Allocation Date | February 1996 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+---------------+*/ + MustIPv4Addr("172.16.0.0/12"), + + /*+----------------------+---------------------------------+ + | Attribute | Value | + +----------------------+---------------------------------+ + | Address Block | 192.0.0.0/24 [2] | + | Name | IETF Protocol Assignments | + | RFC | Section 2.1 of this document | + | Allocation Date | January 2010 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+---------------------------------+*/ + // [2] Not usable unless by virtue of a more specific + // reservation. + MustIPv4Addr("192.0.0.0/24"), + + /*+----------------------+--------------------------------+ + | Attribute | Value | + +----------------------+--------------------------------+ + | Address Block | 192.0.0.0/29 | + | Name | IPv4 Service Continuity Prefix | + | RFC | [RFC6333], [RFC7335] | + | Allocation Date | June 2011 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+--------------------------------+*/ + MustIPv4Addr("192.0.0.0/29"), + + /*+----------------------+----------------------------+ + | Attribute | Value | + +----------------------+----------------------------+ + | Address Block | 192.0.2.0/24 | + | Name | Documentation (TEST-NET-1) | + | RFC | [RFC5737] | + | Allocation Date | January 2010 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------------------+*/ + MustIPv4Addr("192.0.2.0/24"), + + /*+----------------------+--------------------+ + | Attribute | Value | + +----------------------+--------------------+ + | Address Block | 192.88.99.0/24 | + | Name | 6to4 Relay Anycast | + | RFC | [RFC3068] | + | Allocation Date | June 2001 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | True | + | Reserved-by-Protocol | False | + +----------------------+--------------------+*/ + MustIPv4Addr("192.88.99.0/24"), + + /*+----------------------+----------------+ + | Attribute | Value | + +----------------------+----------------+ + | Address Block | 192.168.0.0/16 | + | Name | Private-Use | + | RFC | [RFC1918] | + | Allocation Date | February 1996 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------+*/ + MustIPv4Addr("192.168.0.0/16"), + + /*+----------------------+---------------+ + | Attribute | Value | + +----------------------+---------------+ + | Address Block | 198.18.0.0/15 | + | Name | Benchmarking | + | RFC | [RFC2544] | + | Allocation Date | March 1999 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+---------------+*/ + MustIPv4Addr("198.18.0.0/15"), + + /*+----------------------+----------------------------+ + | Attribute | Value | + +----------------------+----------------------------+ + | Address Block | 198.51.100.0/24 | + | Name | Documentation (TEST-NET-2) | + | RFC | [RFC5737] | + | Allocation Date | January 2010 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------------------+*/ + MustIPv4Addr("198.51.100.0/24"), + + /*+----------------------+----------------------------+ + | Attribute | Value | + +----------------------+----------------------------+ + | Address Block | 203.0.113.0/24 | + | Name | Documentation (TEST-NET-3) | + | RFC | [RFC5737] | + | Allocation Date | January 2010 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------------------+*/ + MustIPv4Addr("203.0.113.0/24"), + + /*+----------------------+----------------------+ + | Attribute | Value | + +----------------------+----------------------+ + | Address Block | 240.0.0.0/4 | + | Name | Reserved | + | RFC | [RFC1112], Section 4 | + | Allocation Date | August 1989 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | True | + +----------------------+----------------------+*/ + MustIPv4Addr("240.0.0.0/4"), + + /*+----------------------+----------------------+ + | Attribute | Value | + +----------------------+----------------------+ + | Address Block | 255.255.255.255/32 | + | Name | Limited Broadcast | + | RFC | [RFC0919], Section 7 | + | Allocation Date | October 1984 | + | Termination Date | N/A | + | Source | False | + | Destination | True | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------------+*/ + MustIPv4Addr("255.255.255.255/32"), + + /*+----------------------+------------------+ + | Attribute | Value | + +----------------------+------------------+ + | Address Block | ::1/128 | + | Name | Loopback Address | + | RFC | [RFC4291] | + | Allocation Date | February 2006 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | True | + +----------------------+------------------+*/ + MustIPv6Addr("::1/128"), + + /*+----------------------+---------------------+ + | Attribute | Value | + +----------------------+---------------------+ + | Address Block | ::/128 | + | Name | Unspecified Address | + | RFC | [RFC4291] | + | Allocation Date | February 2006 | + | Termination Date | N/A | + | Source | True | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | True | + +----------------------+---------------------+*/ + MustIPv6Addr("::/128"), + + /*+----------------------+---------------------+ + | Attribute | Value | + +----------------------+---------------------+ + | Address Block | 64:ff9b::/96 | + | Name | IPv4-IPv6 Translat. | + | RFC | [RFC6052] | + | Allocation Date | October 2010 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | True | + | Reserved-by-Protocol | False | + +----------------------+---------------------+*/ + MustIPv6Addr("64:ff9b::/96"), + + /*+----------------------+---------------------+ + | Attribute | Value | + +----------------------+---------------------+ + | Address Block | ::ffff:0:0/96 | + | Name | IPv4-mapped Address | + | RFC | [RFC4291] | + | Allocation Date | February 2006 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | True | + +----------------------+---------------------+*/ + MustIPv6Addr("::ffff:0:0/96"), + + /*+----------------------+----------------------------+ + | Attribute | Value | + +----------------------+----------------------------+ + | Address Block | 100::/64 | + | Name | Discard-Only Address Block | + | RFC | [RFC6666] | + | Allocation Date | June 2012 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------------------+*/ + MustIPv6Addr("100::/64"), + + /*+----------------------+---------------------------+ + | Attribute | Value | + +----------------------+---------------------------+ + | Address Block | 2001::/23 | + | Name | IETF Protocol Assignments | + | RFC | [RFC2928] | + | Allocation Date | September 2000 | + | Termination Date | N/A | + | Source | False[1] | + | Destination | False[1] | + | Forwardable | False[1] | + | Global | False[1] | + | Reserved-by-Protocol | False | + +----------------------+---------------------------+*/ + // [1] Unless allowed by a more specific allocation. + MustIPv6Addr("2001::/16"), + + /*+----------------------+----------------+ + | Attribute | Value | + +----------------------+----------------+ + | Address Block | 2001::/32 | + | Name | TEREDO | + | RFC | [RFC4380] | + | Allocation Date | January 2006 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------+*/ + // Covered by previous entry, included for completeness. + // + // MustIPv6Addr("2001::/16"), + + /*+----------------------+----------------+ + | Attribute | Value | + +----------------------+----------------+ + | Address Block | 2001:2::/48 | + | Name | Benchmarking | + | RFC | [RFC5180] | + | Allocation Date | April 2008 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+----------------+*/ + // Covered by previous entry, included for completeness. + // + // MustIPv6Addr("2001:2::/48"), + + /*+----------------------+---------------+ + | Attribute | Value | + +----------------------+---------------+ + | Address Block | 2001:db8::/32 | + | Name | Documentation | + | RFC | [RFC3849] | + | Allocation Date | July 2004 | + | Termination Date | N/A | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+---------------+*/ + // Covered by previous entry, included for completeness. + // + // MustIPv6Addr("2001:db8::/32"), + + /*+----------------------+--------------+ + | Attribute | Value | + +----------------------+--------------+ + | Address Block | 2001:10::/28 | + | Name | ORCHID | + | RFC | [RFC4843] | + | Allocation Date | March 2007 | + | Termination Date | March 2014 | + | Source | False | + | Destination | False | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+--------------+*/ + // Covered by previous entry, included for completeness. + // + // MustIPv6Addr("2001:10::/28"), + + /*+----------------------+---------------+ + | Attribute | Value | + +----------------------+---------------+ + | Address Block | 2002::/16 [2] | + | Name | 6to4 | + | RFC | [RFC3056] | + | Allocation Date | February 2001 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | N/A [2] | + | Reserved-by-Protocol | False | + +----------------------+---------------+*/ + // [2] See [RFC3056] for details. + MustIPv6Addr("2002::/16"), + + /*+----------------------+--------------+ + | Attribute | Value | + +----------------------+--------------+ + | Address Block | fc00::/7 | + | Name | Unique-Local | + | RFC | [RFC4193] | + | Allocation Date | October 2005 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | True | + | Global | False | + | Reserved-by-Protocol | False | + +----------------------+--------------+*/ + MustIPv6Addr("fc00::/7"), + + /*+----------------------+-----------------------+ + | Attribute | Value | + +----------------------+-----------------------+ + | Address Block | fe80::/10 | + | Name | Linked-Scoped Unicast | + | RFC | [RFC4291] | + | Allocation Date | February 2006 | + | Termination Date | N/A | + | Source | True | + | Destination | True | + | Forwardable | False | + | Global | False | + | Reserved-by-Protocol | True | + +----------------------+-----------------------+*/ + MustIPv6Addr("fe80::/10"), + }, + 7335: { + // [RFC7335] IPv4 Service Continuity Prefix + MustIPv4Addr("192.0.0.0/29"), // [RFC7335], ยง6 IANA Considerations + }, + ForwardingBlacklist: { // Pseudo-RFC + // Blacklist of non-forwardable IP blocks taken from RFC6890 + // + // TODO: the attributes for forwardable should be + // searcahble and embedded in the main list of RFCs + // above. + MustIPv4Addr("0.0.0.0/8"), + MustIPv4Addr("127.0.0.0/8"), + MustIPv4Addr("169.254.0.0/16"), + MustIPv4Addr("192.0.0.0/24"), + MustIPv4Addr("192.0.2.0/24"), + MustIPv4Addr("198.51.100.0/24"), + MustIPv4Addr("203.0.113.0/24"), + MustIPv4Addr("240.0.0.0/4"), + MustIPv4Addr("255.255.255.255/32"), + MustIPv6Addr("::1/128"), + MustIPv6Addr("::/128"), + MustIPv6Addr("::ffff:0:0/96"), + + // There is no way of expressing a whitelist per RFC2928 + // atm without creating a negative mask, which I don't + // want to do atm. + //MustIPv6Addr("2001::/23"), + + MustIPv6Addr("2001:db8::/32"), + MustIPv6Addr("2001:10::/28"), + MustIPv6Addr("fe80::/10"), + }, + } +} + +// VisitAllRFCs iterates over all known RFCs and calls the visitor +func VisitAllRFCs(fn func(rfcNum uint, sockaddrs SockAddrs)) { + rfcNetMap := KnownRFCs() + + // Blacklist of faux-RFCs. Don't show the world that we're abusing the + // RFC system in this library. + rfcBlacklist := map[uint]struct{}{ + ForwardingBlacklist: {}, + } + + for rfcNum, sas := range rfcNetMap { + if _, found := rfcBlacklist[rfcNum]; !found { + fn(rfcNum, sas) + } + } +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/route_info.go b/vendor/github.com/hashicorp/go-sockaddr/route_info.go new file mode 100644 index 0000000..2a3ee1d --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/route_info.go @@ -0,0 +1,19 @@ +package sockaddr + +// RouteInterface specifies an interface for obtaining memoized route table and +// network information from a given OS. +type RouteInterface interface { + // GetDefaultInterfaceName returns the name of the interface that has a + // default route or an error and an empty string if a problem was + // encountered. + GetDefaultInterfaceName() (string, error) +} + +// VisitCommands visits each command used by the platform-specific RouteInfo +// implementation. +func (ri routeInfo) VisitCommands(fn func(name string, cmd []string)) { + for k, v := range ri.cmds { + cmds := append([]string(nil), v...) + fn(k, cmds) + } +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/route_info_bsd.go b/vendor/github.com/hashicorp/go-sockaddr/route_info_bsd.go new file mode 100644 index 0000000..705757a --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/route_info_bsd.go @@ -0,0 +1,36 @@ +// +build darwin dragonfly freebsd netbsd openbsd + +package sockaddr + +import "os/exec" + +var cmds map[string][]string = map[string][]string{ + "route": {"/sbin/route", "-n", "get", "default"}, +} + +type routeInfo struct { + cmds map[string][]string +} + +// NewRouteInfo returns a BSD-specific implementation of the RouteInfo +// interface. +func NewRouteInfo() (routeInfo, error) { + return routeInfo{ + cmds: cmds, + }, nil +} + +// GetDefaultInterfaceName returns the interface name attached to the default +// route on the default interface. +func (ri routeInfo) GetDefaultInterfaceName() (string, error) { + out, err := exec.Command(cmds["route"][0], cmds["route"][1:]...).Output() + if err != nil { + return "", err + } + + var ifName string + if ifName, err = parseDefaultIfNameFromRoute(string(out)); err != nil { + return "", err + } + return ifName, nil +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/route_info_default.go b/vendor/github.com/hashicorp/go-sockaddr/route_info_default.go new file mode 100644 index 0000000..d1b009f --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/route_info_default.go @@ -0,0 +1,10 @@ +// +build android nacl plan9 + +package sockaddr + +import "errors" + +// getDefaultIfName is the default interface function for unsupported platforms. +func getDefaultIfName() (string, error) { + return "", errors.New("No default interface found (unsupported platform)") +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/route_info_linux.go b/vendor/github.com/hashicorp/go-sockaddr/route_info_linux.go new file mode 100644 index 0000000..c2ec91e --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/route_info_linux.go @@ -0,0 +1,40 @@ +package sockaddr + +import ( + "errors" + "os/exec" +) + +type routeInfo struct { + cmds map[string][]string +} + +// NewRouteInfo returns a Linux-specific implementation of the RouteInfo +// interface. +func NewRouteInfo() (routeInfo, error) { + // CoreOS Container Linux moved ip to /usr/bin/ip, so look it up on + // $PATH and fallback to /sbin/ip on error. + path, _ := exec.LookPath("ip") + if path == "" { + path = "/sbin/ip" + } + + return routeInfo{ + cmds: map[string][]string{"ip": {path, "route"}}, + }, nil +} + +// GetDefaultInterfaceName returns the interface name attached to the default +// route on the default interface. +func (ri routeInfo) GetDefaultInterfaceName() (string, error) { + out, err := exec.Command(ri.cmds["ip"][0], ri.cmds["ip"][1:]...).Output() + if err != nil { + return "", err + } + + var ifName string + if ifName, err = parseDefaultIfNameFromIPCmd(string(out)); err != nil { + return "", errors.New("No default interface found") + } + return ifName, nil +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/route_info_solaris.go b/vendor/github.com/hashicorp/go-sockaddr/route_info_solaris.go new file mode 100644 index 0000000..ee8e798 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/route_info_solaris.go @@ -0,0 +1,37 @@ +package sockaddr + +import ( + "errors" + "os/exec" +) + +var cmds map[string][]string = map[string][]string{ + "route": {"/usr/sbin/route", "-n", "get", "default"}, +} + +type routeInfo struct { + cmds map[string][]string +} + +// NewRouteInfo returns a BSD-specific implementation of the RouteInfo +// interface. +func NewRouteInfo() (routeInfo, error) { + return routeInfo{ + cmds: cmds, + }, nil +} + +// GetDefaultInterfaceName returns the interface name attached to the default +// route on the default interface. +func (ri routeInfo) GetDefaultInterfaceName() (string, error) { + out, err := exec.Command(cmds["route"][0], cmds["route"][1:]...).Output() + if err != nil { + return "", err + } + + var ifName string + if ifName, err = parseDefaultIfNameFromRoute(string(out)); err != nil { + return "", errors.New("No default interface found") + } + return ifName, nil +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/route_info_windows.go b/vendor/github.com/hashicorp/go-sockaddr/route_info_windows.go new file mode 100644 index 0000000..3da9728 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/route_info_windows.go @@ -0,0 +1,41 @@ +package sockaddr + +import "os/exec" + +var cmds map[string][]string = map[string][]string{ + "netstat": {"netstat", "-rn"}, + "ipconfig": {"ipconfig"}, +} + +type routeInfo struct { + cmds map[string][]string +} + +// NewRouteInfo returns a BSD-specific implementation of the RouteInfo +// interface. +func NewRouteInfo() (routeInfo, error) { + return routeInfo{ + cmds: cmds, + }, nil +} + +// GetDefaultInterfaceName returns the interface name attached to the default +// route on the default interface. +func (ri routeInfo) GetDefaultInterfaceName() (string, error) { + ifNameOut, err := exec.Command(cmds["netstat"][0], cmds["netstat"][1:]...).Output() + if err != nil { + return "", err + } + + ipconfigOut, err := exec.Command(cmds["ipconfig"][0], cmds["ipconfig"][1:]...).Output() + if err != nil { + return "", err + } + + ifName, err := parseDefaultIfNameWindows(string(ifNameOut), string(ipconfigOut)) + if err != nil { + return "", err + } + + return ifName, nil +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/sockaddr.go b/vendor/github.com/hashicorp/go-sockaddr/sockaddr.go new file mode 100644 index 0000000..826c91c --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/sockaddr.go @@ -0,0 +1,206 @@ +package sockaddr + +import ( + "encoding/json" + "fmt" + "strings" +) + +type SockAddrType int +type AttrName string + +const ( + TypeUnknown SockAddrType = 0x0 + TypeUnix = 0x1 + TypeIPv4 = 0x2 + TypeIPv6 = 0x4 + + // TypeIP is the union of TypeIPv4 and TypeIPv6 + TypeIP = 0x6 +) + +type SockAddr interface { + // CmpRFC returns 0 if SockAddr exactly matches one of the matched RFC + // networks, -1 if the receiver is contained within the RFC network, or + // 1 if the address is not contained within the RFC. + CmpRFC(rfcNum uint, sa SockAddr) int + + // Contains returns true if the SockAddr arg is contained within the + // receiver + Contains(SockAddr) bool + + // Equal allows for the comparison of two SockAddrs + Equal(SockAddr) bool + + DialPacketArgs() (string, string) + DialStreamArgs() (string, string) + ListenPacketArgs() (string, string) + ListenStreamArgs() (string, string) + + // String returns the string representation of SockAddr + String() string + + // Type returns the SockAddrType + Type() SockAddrType +} + +// sockAddrAttrMap is a map of the SockAddr type-specific attributes. +var sockAddrAttrMap map[AttrName]func(SockAddr) string +var sockAddrAttrs []AttrName + +func init() { + sockAddrInit() +} + +// New creates a new SockAddr from the string. The order in which New() +// attempts to construct a SockAddr is: IPv4Addr, IPv6Addr, SockAddrUnix. +// +// NOTE: New() relies on the heuristic wherein if the path begins with either a +// '.' or '/' character before creating a new UnixSock. For UNIX sockets that +// are absolute paths or are nested within a sub-directory, this works as +// expected, however if the UNIX socket is contained in the current working +// directory, this will fail unless the path begins with "./" +// (e.g. "./my-local-socket"). Calls directly to NewUnixSock() do not suffer +// this limitation. Invalid IP addresses such as "256.0.0.0/-1" will run afoul +// of this heuristic and be assumed to be a valid UNIX socket path (which they +// are, but it is probably not what you want and you won't realize it until you +// stat(2) the file system to discover it doesn't exist). +func NewSockAddr(s string) (SockAddr, error) { + ipv4Addr, err := NewIPv4Addr(s) + if err == nil { + return ipv4Addr, nil + } + + ipv6Addr, err := NewIPv6Addr(s) + if err == nil { + return ipv6Addr, nil + } + + // Check to make sure the string begins with either a '.' or '/', or + // contains a '/'. + if len(s) > 1 && (strings.IndexAny(s[0:1], "./") != -1 || strings.IndexByte(s, '/') != -1) { + unixSock, err := NewUnixSock(s) + if err == nil { + return unixSock, nil + } + } + + return nil, fmt.Errorf("Unable to convert %q to an IPv4 or IPv6 address, or a UNIX Socket", s) +} + +// ToIPAddr returns an IPAddr type or nil if the type conversion fails. +func ToIPAddr(sa SockAddr) *IPAddr { + ipa, ok := sa.(IPAddr) + if !ok { + return nil + } + return &ipa +} + +// ToIPv4Addr returns an IPv4Addr type or nil if the type conversion fails. +func ToIPv4Addr(sa SockAddr) *IPv4Addr { + switch v := sa.(type) { + case IPv4Addr: + return &v + default: + return nil + } +} + +// ToIPv6Addr returns an IPv6Addr type or nil if the type conversion fails. +func ToIPv6Addr(sa SockAddr) *IPv6Addr { + switch v := sa.(type) { + case IPv6Addr: + return &v + default: + return nil + } +} + +// ToUnixSock returns a UnixSock type or nil if the type conversion fails. +func ToUnixSock(sa SockAddr) *UnixSock { + switch v := sa.(type) { + case UnixSock: + return &v + default: + return nil + } +} + +// SockAddrAttr returns a string representation of an attribute for the given +// SockAddr. +func SockAddrAttr(sa SockAddr, selector AttrName) string { + fn, found := sockAddrAttrMap[selector] + if !found { + return "" + } + + return fn(sa) +} + +// String() for SockAddrType returns a string representation of the +// SockAddrType (e.g. "IPv4", "IPv6", "UNIX", "IP", or "unknown"). +func (sat SockAddrType) String() string { + switch sat { + case TypeIPv4: + return "IPv4" + case TypeIPv6: + return "IPv6" + // There is no concrete "IP" type. Leaving here as a reminder. + // case TypeIP: + // return "IP" + case TypeUnix: + return "UNIX" + default: + panic("unsupported type") + } +} + +// sockAddrInit is called once at init() +func sockAddrInit() { + sockAddrAttrs = []AttrName{ + "type", // type should be first + "string", + } + + sockAddrAttrMap = map[AttrName]func(sa SockAddr) string{ + "string": func(sa SockAddr) string { + return sa.String() + }, + "type": func(sa SockAddr) string { + return sa.Type().String() + }, + } +} + +// UnixSockAttrs returns a list of attributes supported by the UnixSock type +func SockAddrAttrs() []AttrName { + return sockAddrAttrs +} + +// Although this is pretty trivial to do in a program, having the logic here is +// useful all around. Note that this marshals into a *string* -- the underlying +// string representation of the sockaddr. If you then unmarshal into this type +// in Go, all will work as expected, but externally you can take what comes out +// and use the string value directly. +type SockAddrMarshaler struct { + SockAddr +} + +func (s *SockAddrMarshaler) MarshalJSON() ([]byte, error) { + return json.Marshal(s.SockAddr.String()) +} + +func (s *SockAddrMarshaler) UnmarshalJSON(in []byte) error { + var str string + err := json.Unmarshal(in, &str) + if err != nil { + return err + } + sa, err := NewSockAddr(str) + if err != nil { + return err + } + s.SockAddr = sa + return nil +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/sockaddrs.go b/vendor/github.com/hashicorp/go-sockaddr/sockaddrs.go new file mode 100644 index 0000000..75fbffb --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/sockaddrs.go @@ -0,0 +1,193 @@ +package sockaddr + +import ( + "bytes" + "sort" +) + +// SockAddrs is a slice of SockAddrs +type SockAddrs []SockAddr + +func (s SockAddrs) Len() int { return len(s) } +func (s SockAddrs) Swap(i, j int) { s[i], s[j] = s[j], s[i] } + +// CmpAddrFunc is the function signature that must be met to be used in the +// OrderedAddrBy multiAddrSorter +type CmpAddrFunc func(p1, p2 *SockAddr) int + +// multiAddrSorter implements the Sort interface, sorting the SockAddrs within. +type multiAddrSorter struct { + addrs SockAddrs + cmp []CmpAddrFunc +} + +// Sort sorts the argument slice according to the Cmp functions passed to +// OrderedAddrBy. +func (ms *multiAddrSorter) Sort(sockAddrs SockAddrs) { + ms.addrs = sockAddrs + sort.Sort(ms) +} + +// OrderedAddrBy sorts SockAddr by the list of sort function pointers. +func OrderedAddrBy(cmpFuncs ...CmpAddrFunc) *multiAddrSorter { + return &multiAddrSorter{ + cmp: cmpFuncs, + } +} + +// Len is part of sort.Interface. +func (ms *multiAddrSorter) Len() int { + return len(ms.addrs) +} + +// Less is part of sort.Interface. It is implemented by looping along the +// Cmp() functions until it finds a comparison that is either less than, +// equal to, or greater than. +func (ms *multiAddrSorter) Less(i, j int) bool { + p, q := &ms.addrs[i], &ms.addrs[j] + // Try all but the last comparison. + var k int + for k = 0; k < len(ms.cmp)-1; k++ { + cmp := ms.cmp[k] + x := cmp(p, q) + switch x { + case -1: + // p < q, so we have a decision. + return true + case 1: + // p > q, so we have a decision. + return false + } + // p == q; try the next comparison. + } + // All comparisons to here said "equal", so just return whatever the + // final comparison reports. + switch ms.cmp[k](p, q) { + case -1: + return true + case 1: + return false + default: + // Still a tie! Now what? + return false + } +} + +// Swap is part of sort.Interface. +func (ms *multiAddrSorter) Swap(i, j int) { + ms.addrs[i], ms.addrs[j] = ms.addrs[j], ms.addrs[i] +} + +const ( + // NOTE (sean@): These constants are here for code readability only and + // are sprucing up the code for readability purposes. Some of the + // Cmp*() variants have confusing logic (especially when dealing with + // mixed-type comparisons) and this, I think, has made it easier to grok + // the code faster. + sortReceiverBeforeArg = -1 + sortDeferDecision = 0 + sortArgBeforeReceiver = 1 +) + +// AscAddress is a sorting function to sort SockAddrs by their respective +// address type. Non-equal types are deferred in the sort. +func AscAddress(p1Ptr, p2Ptr *SockAddr) int { + p1 := *p1Ptr + p2 := *p2Ptr + + switch v := p1.(type) { + case IPv4Addr: + return v.CmpAddress(p2) + case IPv6Addr: + return v.CmpAddress(p2) + case UnixSock: + return v.CmpAddress(p2) + default: + return sortDeferDecision + } +} + +// AscPort is a sorting function to sort SockAddrs by their respective address +// type. Non-equal types are deferred in the sort. +func AscPort(p1Ptr, p2Ptr *SockAddr) int { + p1 := *p1Ptr + p2 := *p2Ptr + + switch v := p1.(type) { + case IPv4Addr: + return v.CmpPort(p2) + case IPv6Addr: + return v.CmpPort(p2) + default: + return sortDeferDecision + } +} + +// AscPrivate is a sorting function to sort "more secure" private values before +// "more public" values. Both IPv4 and IPv6 are compared against RFC6890 +// (RFC6890 includes, and is not limited to, RFC1918 and RFC6598 for IPv4, and +// IPv6 includes RFC4193). +func AscPrivate(p1Ptr, p2Ptr *SockAddr) int { + p1 := *p1Ptr + p2 := *p2Ptr + + switch v := p1.(type) { + case IPv4Addr, IPv6Addr: + return v.CmpRFC(6890, p2) + default: + return sortDeferDecision + } +} + +// AscNetworkSize is a sorting function to sort SockAddrs based on their network +// size. Non-equal types are deferred in the sort. +func AscNetworkSize(p1Ptr, p2Ptr *SockAddr) int { + p1 := *p1Ptr + p2 := *p2Ptr + p1Type := p1.Type() + p2Type := p2.Type() + + // Network size operations on non-IP types make no sense + if p1Type != p2Type && p1Type != TypeIP { + return sortDeferDecision + } + + ipA := p1.(IPAddr) + ipB := p2.(IPAddr) + + return bytes.Compare([]byte(*ipA.NetIPMask()), []byte(*ipB.NetIPMask())) +} + +// AscType is a sorting function to sort "more secure" types before +// "less-secure" types. +func AscType(p1Ptr, p2Ptr *SockAddr) int { + p1 := *p1Ptr + p2 := *p2Ptr + p1Type := p1.Type() + p2Type := p2.Type() + switch { + case p1Type < p2Type: + return sortReceiverBeforeArg + case p1Type == p2Type: + return sortDeferDecision + case p1Type > p2Type: + return sortArgBeforeReceiver + default: + return sortDeferDecision + } +} + +// FilterByType returns two lists: a list of matched and unmatched SockAddrs +func (sas SockAddrs) FilterByType(type_ SockAddrType) (matched, excluded SockAddrs) { + matched = make(SockAddrs, 0, len(sas)) + excluded = make(SockAddrs, 0, len(sas)) + + for _, sa := range sas { + if sa.Type()&type_ != 0 { + matched = append(matched, sa) + } else { + excluded = append(excluded, sa) + } + } + return matched, excluded +} diff --git a/vendor/github.com/hashicorp/go-sockaddr/unixsock.go b/vendor/github.com/hashicorp/go-sockaddr/unixsock.go new file mode 100644 index 0000000..f3be3f6 --- /dev/null +++ b/vendor/github.com/hashicorp/go-sockaddr/unixsock.go @@ -0,0 +1,135 @@ +package sockaddr + +import ( + "fmt" + "strings" +) + +type UnixSock struct { + SockAddr + path string +} +type UnixSocks []*UnixSock + +// unixAttrMap is a map of the UnixSockAddr type-specific attributes. +var unixAttrMap map[AttrName]func(UnixSock) string +var unixAttrs []AttrName + +func init() { + unixAttrInit() +} + +// NewUnixSock creates an UnixSock from a string path. String can be in the +// form of either URI-based string (e.g. `file:///etc/passwd`), an absolute +// path (e.g. `/etc/passwd`), or a relative path (e.g. `./foo`). +func NewUnixSock(s string) (ret UnixSock, err error) { + ret.path = s + return ret, nil +} + +// CmpAddress follows the Cmp() standard protocol and returns: +// +// - -1 If the receiver should sort first because its name lexically sorts before arg +// - 0 if the SockAddr arg is not a UnixSock, or is a UnixSock with the same path. +// - 1 If the argument should sort first. +func (us UnixSock) CmpAddress(sa SockAddr) int { + usb, ok := sa.(UnixSock) + if !ok { + return sortDeferDecision + } + + return strings.Compare(us.Path(), usb.Path()) +} + +// DialPacketArgs returns the arguments required to be passed to net.DialUnix() +// with the `unixgram` network type. +func (us UnixSock) DialPacketArgs() (network, dialArgs string) { + return "unixgram", us.path +} + +// DialStreamArgs returns the arguments required to be passed to net.DialUnix() +// with the `unix` network type. +func (us UnixSock) DialStreamArgs() (network, dialArgs string) { + return "unix", us.path +} + +// Equal returns true if a SockAddr is equal to the receiving UnixSock. +func (us UnixSock) Equal(sa SockAddr) bool { + usb, ok := sa.(UnixSock) + if !ok { + return false + } + + if us.Path() != usb.Path() { + return false + } + + return true +} + +// ListenPacketArgs returns the arguments required to be passed to +// net.ListenUnixgram() with the `unixgram` network type. +func (us UnixSock) ListenPacketArgs() (network, dialArgs string) { + return "unixgram", us.path +} + +// ListenStreamArgs returns the arguments required to be passed to +// net.ListenUnix() with the `unix` network type. +func (us UnixSock) ListenStreamArgs() (network, dialArgs string) { + return "unix", us.path +} + +// MustUnixSock is a helper method that must return an UnixSock or panic on +// invalid input. +func MustUnixSock(addr string) UnixSock { + us, err := NewUnixSock(addr) + if err != nil { + panic(fmt.Sprintf("Unable to create a UnixSock from %+q: %v", addr, err)) + } + return us +} + +// Path returns the given path of the UnixSock +func (us UnixSock) Path() string { + return us.path +} + +// String returns the path of the UnixSock +func (us UnixSock) String() string { + return fmt.Sprintf("%+q", us.path) +} + +// Type is used as a type switch and returns TypeUnix +func (UnixSock) Type() SockAddrType { + return TypeUnix +} + +// UnixSockAttrs returns a list of attributes supported by the UnixSockAddr type +func UnixSockAttrs() []AttrName { + return unixAttrs +} + +// UnixSockAttr returns a string representation of an attribute for the given +// UnixSock. +func UnixSockAttr(us UnixSock, attrName AttrName) string { + fn, found := unixAttrMap[attrName] + if !found { + return "" + } + + return fn(us) +} + +// unixAttrInit is called once at init() +func unixAttrInit() { + // Sorted for human readability + unixAttrs = []AttrName{ + "path", + } + + unixAttrMap = map[AttrName]func(us UnixSock) string{ + "path": func(us UnixSock) string { + return us.Path() + }, + } +} |