diff options
Diffstat (limited to 'lib/if2ip.c')
| -rw-r--r-- | lib/if2ip.c | 66 |
1 files changed, 56 insertions, 10 deletions
diff --git a/lib/if2ip.c b/lib/if2ip.c index 05ae7d6f8..6fc09ec63 100644 --- a/lib/if2ip.c +++ b/lib/if2ip.c @@ -5,7 +5,7 @@ * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * - * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al. + * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms @@ -63,6 +63,38 @@ /* ------------------------------------------------------------------ */ +/* Return the scope of the given address. */ +unsigned int Curl_ipv6_scope(const struct sockaddr *sa) +{ +#ifndef ENABLE_IPV6 + (void) sa; +#else + if(sa->sa_family == AF_INET6) { + const struct sockaddr_in6 * sa6 = (const struct sockaddr_in6 *) sa; + const unsigned char * b = sa6->sin6_addr.s6_addr; + unsigned short w = (unsigned short) ((b[0] << 8) | b[1]); + + switch(w & 0xFFC0) { + case 0xFE80: + return IPV6_SCOPE_LINKLOCAL; + case 0xFEC0: + return IPV6_SCOPE_SITELOCAL; + case 0x0000: + w = b[1] | b[2] | b[3] | b[4] | b[5] | b[6] | b[7] | b[8] | b[9] | + b[10] | b[11] | b[12] | b[13] | b[14]; + if(w || b[15] != 0x01) + break; + return IPV6_SCOPE_NODELOCAL; + default: + break; + } + } +#endif + + return IPV6_SCOPE_GLOBAL; +} + + #if defined(HAVE_GETIFADDRS) bool Curl_if_is_interface_name(const char *interf) @@ -84,7 +116,8 @@ bool Curl_if_is_interface_name(const char *interf) } if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, - const char *interf, char *buf, int buf_size) + unsigned int remote_scope_id, const char *interf, + char *buf, int buf_size) { struct ifaddrs *iface, *head; if2ip_result_t res = IF2IP_NOT_FOUND; @@ -105,20 +138,29 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, #ifdef ENABLE_IPV6 if(af == AF_INET6) { unsigned int scopeid = 0; + unsigned int ifscope = Curl_ipv6_scope(iface->ifa_addr); + + if(ifscope != remote_scope) { + /* We are interested only in interface addresses whose + scope matches the remote address we want to + connect to: global for global, link-local for + link-local, etc... */ + if(res == IF2IP_NOT_FOUND) res = IF2IP_AF_NOT_SUPPORTED; + continue; + } + addr = &((struct sockaddr_in6 *)iface->ifa_addr)->sin6_addr; #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID /* Include the scope of this interface as part of the address */ scopeid = ((struct sockaddr_in6 *)iface->ifa_addr)->sin6_scope_id; -#endif - if(scopeid != remote_scope) { - /* We are interested only in interface addresses whose - scope ID matches the remote address we want to - connect to: global (0) for global, link-local for - link-local, etc... */ + + /* If given, scope id should match. */ + if(remote_scope_id && scopeid != remote_scope_id) { if(res == IF2IP_NOT_FOUND) res = IF2IP_AF_NOT_SUPPORTED; continue; } +#endif if(scopeid) snprintf(scope, sizeof(scope), "%%%u", scopeid); } @@ -154,7 +196,8 @@ bool Curl_if_is_interface_name(const char *interf) } if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, - const char *interf, char *buf, int buf_size) + unsigned int remote_scope_id, const char *interf, + char *buf, int buf_size) { struct ifreq req; struct in_addr in; @@ -163,6 +206,7 @@ if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, size_t len; (void)remote_scope; + (void)remote_scope_id; if(!interf || (af != AF_INET)) return IF2IP_NOT_FOUND; @@ -205,10 +249,12 @@ bool Curl_if_is_interface_name(const char *interf) } if2ip_result_t Curl_if2ip(int af, unsigned int remote_scope, - const char *interf, char *buf, int buf_size) + unsigned int remote_scope_id, const char *interf, + char *buf, int buf_size) { (void) af; (void) remote_scope; + (void) remote_scope_id; (void) interf; (void) buf; (void) buf_size; |