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authorYang Tse <yangsita@gmail.com>2013-01-03 06:13:18 +0100
committerYang Tse <yangsita@gmail.com>2013-01-03 06:13:18 +0100
commit5b6e7927c6891d93edc16695ae786dc686274bab (patch)
tree8b9da426b7152f617522cfa153e541ec26ff6961 /lib/curl_hostip4.c
parent13606bbfdeaa3bac193e1f39a05a9c9b5f15d1b5 (diff)
build: rename 93 lib/*.c files
93 lib/*.c source files renamed to use our standard naming scheme. This commit only does the file renaming. ---------------------------------------- renamed: lib/amigaos.c -> lib/curl_amigaos.c renamed: lib/asyn-ares.c -> lib/curl_asyn_ares.c renamed: lib/asyn-thread.c -> lib/curl_asyn_thread.c renamed: lib/axtls.c -> lib/curl_axtls.c renamed: lib/base64.c -> lib/curl_base64.c renamed: lib/bundles.c -> lib/curl_bundles.c renamed: lib/conncache.c -> lib/curl_conncache.c renamed: lib/connect.c -> lib/curl_connect.c renamed: lib/content_encoding.c -> lib/curl_content_encoding.c renamed: lib/cookie.c -> lib/curl_cookie.c renamed: lib/cyassl.c -> lib/curl_cyassl.c renamed: lib/dict.c -> lib/curl_dict.c renamed: lib/easy.c -> lib/curl_easy.c renamed: lib/escape.c -> lib/curl_escape.c renamed: lib/file.c -> lib/curl_file.c renamed: lib/fileinfo.c -> lib/curl_fileinfo.c renamed: lib/formdata.c -> lib/curl_formdata.c renamed: lib/ftp.c -> lib/curl_ftp.c renamed: lib/ftplistparser.c -> lib/curl_ftplistparser.c renamed: lib/getenv.c -> lib/curl_getenv.c renamed: lib/getinfo.c -> lib/curl_getinfo.c renamed: lib/gopher.c -> lib/curl_gopher.c renamed: lib/gtls.c -> lib/curl_gtls.c renamed: lib/hash.c -> lib/curl_hash.c renamed: lib/hmac.c -> lib/curl_hmac.c renamed: lib/hostasyn.c -> lib/curl_hostasyn.c renamed: lib/hostcheck.c -> lib/curl_hostcheck.c renamed: lib/hostip.c -> lib/curl_hostip.c renamed: lib/hostip4.c -> lib/curl_hostip4.c renamed: lib/hostip6.c -> lib/curl_hostip6.c renamed: lib/hostsyn.c -> lib/curl_hostsyn.c renamed: lib/http.c -> lib/curl_http.c renamed: lib/http_chunks.c -> lib/curl_http_chunks.c renamed: lib/http_digest.c -> lib/curl_http_digest.c renamed: lib/http_negotiate.c -> lib/curl_http_negotiate.c renamed: lib/http_negotiate_sspi.c -> lib/curl_http_negotiate_sspi.c renamed: lib/http_proxy.c -> lib/curl_http_proxy.c renamed: lib/idn_win32.c -> lib/curl_idn_win32.c renamed: lib/if2ip.c -> lib/curl_if2ip.c renamed: lib/imap.c -> lib/curl_imap.c renamed: lib/inet_ntop.c -> lib/curl_inet_ntop.c renamed: lib/inet_pton.c -> lib/curl_inet_pton.c renamed: lib/krb4.c -> lib/curl_krb4.c renamed: lib/krb5.c -> lib/curl_krb5.c renamed: lib/ldap.c -> lib/curl_ldap.c renamed: lib/llist.c -> lib/curl_llist.c renamed: lib/md4.c -> lib/curl_md4.c renamed: lib/md5.c -> lib/curl_md5.c renamed: lib/memdebug.c -> lib/curl_memdebug.c renamed: lib/mprintf.c -> lib/curl_mprintf.c renamed: lib/multi.c -> lib/curl_multi.c renamed: lib/netrc.c -> lib/curl_netrc.c renamed: lib/non-ascii.c -> lib/curl_non_ascii.c renamed: lib/curl_non-ascii.h -> lib/curl_non_ascii.h renamed: lib/nonblock.c -> lib/curl_nonblock.c renamed: lib/nss.c -> lib/curl_nss.c renamed: lib/nwlib.c -> lib/curl_nwlib.c renamed: lib/nwos.c -> lib/curl_nwos.c renamed: lib/openldap.c -> lib/curl_openldap.c renamed: lib/parsedate.c -> lib/curl_parsedate.c renamed: lib/pingpong.c -> lib/curl_pingpong.c renamed: lib/polarssl.c -> lib/curl_polarssl.c renamed: lib/pop3.c -> lib/curl_pop3.c renamed: lib/progress.c -> lib/curl_progress.c renamed: lib/qssl.c -> lib/curl_qssl.c renamed: lib/rawstr.c -> lib/curl_rawstr.c renamed: lib/rtsp.c -> lib/curl_rtsp.c renamed: lib/security.c -> lib/curl_security.c renamed: lib/select.c -> lib/curl_select.c renamed: lib/sendf.c -> lib/curl_sendf.c renamed: lib/share.c -> lib/curl_share.c renamed: lib/slist.c -> lib/curl_slist.c renamed: lib/smtp.c -> lib/curl_smtp.c renamed: lib/socks.c -> lib/curl_socks.c renamed: lib/socks_gssapi.c -> lib/curl_socks_gssapi.c renamed: lib/socks_sspi.c -> lib/curl_socks_sspi.c renamed: lib/speedcheck.c -> lib/curl_speedcheck.c renamed: lib/splay.c -> lib/curl_splay.c renamed: lib/ssh.c -> lib/curl_ssh.c renamed: lib/sslgen.c -> lib/curl_sslgen.c renamed: lib/ssluse.c -> lib/curl_ssluse.c renamed: lib/strdup.c -> lib/curl_strdup.c renamed: lib/strequal.c -> lib/curl_strequal.c renamed: lib/strerror.c -> lib/curl_strerror.c renamed: lib/strtok.c -> lib/curl_strtok.c renamed: lib/strtoofft.c -> lib/curl_strtoofft.c renamed: lib/telnet.c -> lib/curl_telnet.c renamed: lib/tftp.c -> lib/curl_tftp.c renamed: lib/timeval.c -> lib/curl_timeval.c renamed: lib/transfer.c -> lib/curl_transfer.c renamed: lib/url.c -> lib/curl_url.c renamed: lib/version.c -> lib/curl_version.c renamed: lib/warnless.c -> lib/curl_warnless.c renamed: lib/wildcard.c -> lib/curl_wildcard.c ----------------------------------------
Diffstat (limited to 'lib/curl_hostip4.c')
-rw-r--r--lib/curl_hostip4.c310
1 files changed, 310 insertions, 0 deletions
diff --git a/lib/curl_hostip4.c b/lib/curl_hostip4.c
new file mode 100644
index 000000000..5b64b4673
--- /dev/null
+++ b/lib/curl_hostip4.c
@@ -0,0 +1,310 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2012, 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
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef __VMS
+#include <in.h>
+#include <inet.h>
+#endif
+
+#ifdef HAVE_PROCESS_H
+#include <process.h>
+#endif
+
+#include "curl_urldata.h"
+#include "curl_sendf.h"
+#include "curl_hostip.h"
+#include "curl_hash.h"
+#include "curl_share.h"
+#include "curl_strerror.h"
+#include "curl_url.h"
+#include "curl_inet_pton.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "curl_memdebug.h"
+
+/***********************************************************************
+ * Only for plain-ipv4 builds
+ **********************************************************************/
+#ifdef CURLRES_IPV4 /* plain ipv4 code coming up */
+/*
+ * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
+ * been set and returns TRUE if they are OK.
+ */
+bool Curl_ipvalid(struct connectdata *conn)
+{
+ if(conn->ip_version == CURL_IPRESOLVE_V6)
+ /* an ipv6 address was requested and we can't get/use one */
+ return FALSE;
+
+ return TRUE; /* OK, proceed */
+}
+
+#ifdef CURLRES_SYNCH
+
+/*
+ * Curl_getaddrinfo() - the ipv4 synchronous version.
+ *
+ * The original code to this function was from the Dancer source code, written
+ * by Bjorn Reese, it has since been patched and modified considerably.
+ *
+ * gethostbyname_r() is the thread-safe version of the gethostbyname()
+ * function. When we build for plain IPv4, we attempt to use this
+ * function. There are _three_ different gethostbyname_r() versions, and we
+ * detect which one this platform supports in the configure script and set up
+ * the HAVE_GETHOSTBYNAME_R_3, HAVE_GETHOSTBYNAME_R_5 or
+ * HAVE_GETHOSTBYNAME_R_6 defines accordingly. Note that HAVE_GETADDRBYNAME
+ * has the corresponding rules. This is primarily on *nix. Note that some unix
+ * flavours have thread-safe versions of the plain gethostbyname() etc.
+ *
+ */
+Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
+ const char *hostname,
+ int port,
+ int *waitp)
+{
+ Curl_addrinfo *ai = NULL;
+
+#ifdef CURL_DISABLE_VERBOSE_STRINGS
+ (void)conn;
+#endif
+
+ *waitp = 0; /* synchronous response only */
+
+ ai = Curl_ipv4_resolve_r(hostname, port);
+ if(!ai)
+ infof(conn->data, "Curl_ipv4_resolve_r failed for %s\n", hostname);
+
+ return ai;
+}
+#endif /* CURLRES_SYNCH */
+#endif /* CURLRES_IPV4 */
+
+#if defined(CURLRES_IPV4) && !defined(CURLRES_ARES)
+
+/*
+ * Curl_ipv4_resolve_r() - ipv4 threadsafe resolver function.
+ *
+ * This is used for both synchronous and asynchronous resolver builds,
+ * implying that only threadsafe code and function calls may be used.
+ *
+ */
+Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname,
+ int port)
+{
+#if !defined(HAVE_GETADDRINFO_THREADSAFE) && defined(HAVE_GETHOSTBYNAME_R_3)
+ int res;
+#endif
+ Curl_addrinfo *ai = NULL;
+ struct hostent *h = NULL;
+ struct in_addr in;
+ struct hostent *buf = NULL;
+
+ if(Curl_inet_pton(AF_INET, hostname, &in) > 0)
+ /* This is a dotted IP address 123.123.123.123-style */
+ return Curl_ip2addr(AF_INET, &in, hostname, port);
+
+#if defined(HAVE_GETADDRINFO_THREADSAFE)
+ else {
+ struct addrinfo hints;
+ char sbuf[NI_MAXSERV];
+ char *sbufptr = NULL;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_INET;
+ hints.ai_socktype = SOCK_STREAM;
+ if(port) {
+ snprintf(sbuf, sizeof(sbuf), "%d", port);
+ sbufptr = sbuf;
+ }
+
+ (void)Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &ai);
+
+#elif defined(HAVE_GETHOSTBYNAME_R)
+ /*
+ * gethostbyname_r() is the preferred resolve function for many platforms.
+ * Since there are three different versions of it, the following code is
+ * somewhat #ifdef-ridden.
+ */
+ else {
+ int h_errnop;
+
+ buf = calloc(1, CURL_HOSTENT_SIZE);
+ if(!buf)
+ return NULL; /* major failure */
+ /*
+ * The clearing of the buffer is a workaround for a gethostbyname_r bug in
+ * qnx nto and it is also _required_ for some of these functions on some
+ * platforms.
+ */
+
+#if defined(HAVE_GETHOSTBYNAME_R_5)
+ /* Solaris, IRIX and more */
+ h = gethostbyname_r(hostname,
+ (struct hostent *)buf,
+ (char *)buf + sizeof(struct hostent),
+ CURL_HOSTENT_SIZE - sizeof(struct hostent),
+ &h_errnop);
+
+ /* If the buffer is too small, it returns NULL and sets errno to
+ * ERANGE. The errno is thread safe if this is compiled with
+ * -D_REENTRANT as then the 'errno' variable is a macro defined to get
+ * used properly for threads.
+ */
+
+ if(h) {
+ ;
+ }
+ else
+#elif defined(HAVE_GETHOSTBYNAME_R_6)
+ /* Linux */
+
+ (void)gethostbyname_r(hostname,
+ (struct hostent *)buf,
+ (char *)buf + sizeof(struct hostent),
+ CURL_HOSTENT_SIZE - sizeof(struct hostent),
+ &h, /* DIFFERENCE */
+ &h_errnop);
+ /* Redhat 8, using glibc 2.2.93 changed the behavior. Now all of a
+ * sudden this function returns EAGAIN if the given buffer size is too
+ * small. Previous versions are known to return ERANGE for the same
+ * problem.
+ *
+ * This wouldn't be such a big problem if older versions wouldn't
+ * sometimes return EAGAIN on a common failure case. Alas, we can't
+ * assume that EAGAIN *or* ERANGE means ERANGE for any given version of
+ * glibc.
+ *
+ * For now, we do that and thus we may call the function repeatedly and
+ * fail for older glibc versions that return EAGAIN, until we run out of
+ * buffer size (step_size grows beyond CURL_HOSTENT_SIZE).
+ *
+ * If anyone has a better fix, please tell us!
+ *
+ * -------------------------------------------------------------------
+ *
+ * On October 23rd 2003, Dan C dug up more details on the mysteries of
+ * gethostbyname_r() in glibc:
+ *
+ * In glibc 2.2.5 the interface is different (this has also been
+ * discovered in glibc 2.1.1-6 as shipped by Redhat 6). What I can't
+ * explain, is that tests performed on glibc 2.2.4-34 and 2.2.4-32
+ * (shipped/upgraded by Redhat 7.2) don't show this behavior!
+ *
+ * In this "buggy" version, the return code is -1 on error and 'errno'
+ * is set to the ERANGE or EAGAIN code. Note that 'errno' is not a
+ * thread-safe variable.
+ */
+
+ if(!h) /* failure */
+#elif defined(HAVE_GETHOSTBYNAME_R_3)
+ /* AIX, Digital Unix/Tru64, HPUX 10, more? */
+
+ /* For AIX 4.3 or later, we don't use gethostbyname_r() at all, because of
+ * the plain fact that it does not return unique full buffers on each
+ * call, but instead several of the pointers in the hostent structs will
+ * point to the same actual data! This have the unfortunate down-side that
+ * our caching system breaks down horribly. Luckily for us though, AIX 4.3
+ * and more recent versions have a "completely thread-safe"[*] libc where
+ * all the data is stored in thread-specific memory areas making calls to
+ * the plain old gethostbyname() work fine even for multi-threaded
+ * programs.
+ *
+ * This AIX 4.3 or later detection is all made in the configure script.
+ *
+ * Troels Walsted Hansen helped us work this out on March 3rd, 2003.
+ *
+ * [*] = much later we've found out that it isn't at all "completely
+ * thread-safe", but at least the gethostbyname() function is.
+ */
+
+ if(CURL_HOSTENT_SIZE >=
+ (sizeof(struct hostent)+sizeof(struct hostent_data))) {
+
+ /* August 22nd, 2000: Albert Chin-A-Young brought an updated version
+ * that should work! September 20: Richard Prescott worked on the buffer
+ * size dilemma.
+ */
+
+ res = gethostbyname_r(hostname,
+ (struct hostent *)buf,
+ (struct hostent_data *)((char *)buf +
+ sizeof(struct hostent)));
+ h_errnop = SOCKERRNO; /* we don't deal with this, but set it anyway */
+ }
+ else
+ res = -1; /* failure, too smallish buffer size */
+
+ if(!res) { /* success */
+
+ h = buf; /* result expected in h */
+
+ /* This is the worst kind of the different gethostbyname_r() interfaces.
+ * Since we don't know how big buffer this particular lookup required,
+ * we can't realloc down the huge alloc without doing closer analysis of
+ * the returned data. Thus, we always use CURL_HOSTENT_SIZE for every
+ * name lookup. Fixing this would require an extra malloc() and then
+ * calling Curl_addrinfo_copy() that subsequent realloc()s down the new
+ * memory area to the actually used amount.
+ */
+ }
+ else
+#endif /* HAVE_...BYNAME_R_5 || HAVE_...BYNAME_R_6 || HAVE_...BYNAME_R_3 */
+ {
+ h = NULL; /* set return code to NULL */
+ free(buf);
+ }
+#else /* HAVE_GETADDRINFO_THREADSAFE || HAVE_GETHOSTBYNAME_R */
+ /*
+ * Here is code for platforms that don't have a thread safe
+ * getaddrinfo() nor gethostbyname_r() function or for which
+ * gethostbyname() is the preferred one.
+ */
+ else {
+ h = gethostbyname((void*)hostname);
+#endif /* HAVE_GETADDRINFO_THREADSAFE || HAVE_GETHOSTBYNAME_R */
+ }
+
+ if(h) {
+ ai = Curl_he2ai(h, port);
+
+ if(buf) /* used a *_r() function */
+ free(buf);
+ }
+
+ return ai;
+}
+#endif /* defined(CURLRES_IPV4) && !defined(CURLRES_ARES) */