diff options
Diffstat (limited to 'libcurl/src/lib/curl_addrinfo.c')
| -rw-r--r-- | libcurl/src/lib/curl_addrinfo.c | 558 |
1 files changed, 558 insertions, 0 deletions
diff --git a/libcurl/src/lib/curl_addrinfo.c b/libcurl/src/lib/curl_addrinfo.c new file mode 100644 index 0000000..e572fdc --- /dev/null +++ b/libcurl/src/lib/curl_addrinfo.c @@ -0,0 +1,558 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * 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
+ * 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"
+
+#include <curl/curl.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 HAVE_SYS_UN_H
+# include <sys/un.h>
+#endif
+
+#ifdef __VMS
+# include <in.h>
+# include <inet.h>
+#endif
+
+#if defined(NETWARE) && defined(__NOVELL_LIBC__)
+# undef in_addr_t
+# define in_addr_t unsigned long
+#endif
+
+#include "curl_addrinfo.h"
+#include "inet_pton.h"
+#include "warnless.h"
+#include "curl_printf.h"
+#include "curl_memory.h"
+
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/*
+ * Curl_freeaddrinfo()
+ *
+ * This is used to free a linked list of Curl_addrinfo structs along
+ * with all its associated allocated storage. This function should be
+ * called once for each successful call to Curl_getaddrinfo_ex() or to
+ * any function call which actually allocates a Curl_addrinfo struct.
+ */
+
+#if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
+ defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
+ /* workaround icc 9.1 optimizer issue */
+# define vqualifier volatile
+#else
+# define vqualifier
+#endif
+
+CURL_STATIC void
+Curl_freeaddrinfo(Curl_addrinfo *cahead)
+{
+ Curl_addrinfo *vqualifier canext;
+ Curl_addrinfo *ca;
+
+ for(ca = cahead; ca != NULL; ca = canext) {
+ free(ca->ai_addr);
+ free(ca->ai_canonname);
+ canext = ca->ai_next;
+
+ free(ca);
+ }
+}
+
+
+#ifdef HAVE_GETADDRINFO
+/*
+ * Curl_getaddrinfo_ex()
+ *
+ * This is a wrapper function around system's getaddrinfo(), with
+ * the only difference that instead of returning a linked list of
+ * addrinfo structs this one returns a linked list of Curl_addrinfo
+ * ones. The memory allocated by this function *MUST* be free'd with
+ * Curl_freeaddrinfo(). For each successful call to this function
+ * there must be an associated call later to Curl_freeaddrinfo().
+ *
+ * There should be no single call to system's getaddrinfo() in the
+ * whole library, any such call should be 'routed' through this one.
+ */
+
+CURL_STATIC int
+Curl_getaddrinfo_ex(const char *nodename,
+ const char *servname,
+ const struct addrinfo *hints,
+ Curl_addrinfo **result)
+{
+ const struct addrinfo *ai;
+ struct addrinfo *aihead;
+ Curl_addrinfo *cafirst = NULL;
+ Curl_addrinfo *calast = NULL;
+ Curl_addrinfo *ca;
+ size_t ss_size;
+ int error;
+
+ *result = NULL; /* assume failure */
+
+ error = getaddrinfo(nodename, servname, hints, &aihead);
+ if(error)
+ return error;
+
+ /* traverse the addrinfo list */
+
+ for(ai = aihead; ai != NULL; ai = ai->ai_next) {
+
+ /* ignore elements with unsupported address family, */
+ /* settle family-specific sockaddr structure size. */
+ if(ai->ai_family == AF_INET)
+ ss_size = sizeof(struct sockaddr_in);
+#ifdef ENABLE_IPV6
+ else if(ai->ai_family == AF_INET6)
+ ss_size = sizeof(struct sockaddr_in6);
+#endif
+ else
+ continue;
+
+ /* ignore elements without required address info */
+ if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
+ continue;
+
+ /* ignore elements with bogus address size */
+ if((size_t)ai->ai_addrlen < ss_size)
+ continue;
+
+ if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
+ error = EAI_MEMORY;
+ break;
+ }
+
+ /* copy each structure member individually, member ordering, */
+ /* size, or padding might be different for each platform. */
+
+ ca->ai_flags = ai->ai_flags;
+ ca->ai_family = ai->ai_family;
+ ca->ai_socktype = ai->ai_socktype;
+ ca->ai_protocol = ai->ai_protocol;
+ ca->ai_addrlen = (curl_socklen_t)ss_size;
+ ca->ai_addr = NULL;
+ ca->ai_canonname = NULL;
+ ca->ai_next = NULL;
+
+ if((ca->ai_addr = malloc(ss_size)) == NULL) {
+ error = EAI_MEMORY;
+ free(ca);
+ break;
+ }
+ memcpy(ca->ai_addr, ai->ai_addr, ss_size);
+
+ if(ai->ai_canonname != NULL) {
+ if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
+ error = EAI_MEMORY;
+ free(ca->ai_addr);
+ free(ca);
+ break;
+ }
+ }
+
+ /* if the return list is empty, this becomes the first element */
+ if(!cafirst)
+ cafirst = ca;
+
+ /* add this element last in the return list */
+ if(calast)
+ calast->ai_next = ca;
+ calast = ca;
+
+ }
+
+ /* destroy the addrinfo list */
+ if(aihead)
+ freeaddrinfo(aihead);
+
+ /* if we failed, also destroy the Curl_addrinfo list */
+ if(error) {
+ Curl_freeaddrinfo(cafirst);
+ cafirst = NULL;
+ }
+ else if(!cafirst) {
+#ifdef EAI_NONAME
+ /* rfc3493 conformant */
+ error = EAI_NONAME;
+#else
+ /* rfc3493 obsoleted */
+ error = EAI_NODATA;
+#endif
+#ifdef USE_WINSOCK
+ SET_SOCKERRNO(error);
+#endif
+ }
+
+ *result = cafirst;
+
+ /* This is not a CURLcode */
+ return error;
+}
+#endif /* HAVE_GETADDRINFO */
+
+
+/*
+ * Curl_he2ai()
+ *
+ * This function returns a pointer to the first element of a newly allocated
+ * Curl_addrinfo struct linked list filled with the data of a given hostent.
+ * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
+ * stack, but usable also for IPv4, all hosts and environments.
+ *
+ * The memory allocated by this function *MUST* be free'd later on calling
+ * Curl_freeaddrinfo(). For each successful call to this function there
+ * must be an associated call later to Curl_freeaddrinfo().
+ *
+ * Curl_addrinfo defined in "lib/curl_addrinfo.h"
+ *
+ * struct Curl_addrinfo {
+ * int ai_flags;
+ * int ai_family;
+ * int ai_socktype;
+ * int ai_protocol;
+ * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
+ * char *ai_canonname;
+ * struct sockaddr *ai_addr;
+ * struct Curl_addrinfo *ai_next;
+ * };
+ * typedef struct Curl_addrinfo Curl_addrinfo;
+ *
+ * hostent defined in <netdb.h>
+ *
+ * struct hostent {
+ * char *h_name;
+ * char **h_aliases;
+ * int h_addrtype;
+ * int h_length;
+ * char **h_addr_list;
+ * };
+ *
+ * for backward compatibility:
+ *
+ * #define h_addr h_addr_list[0]
+ */
+
+CURL_STATIC Curl_addrinfo *
+Curl_he2ai(const struct hostent *he, int port)
+{
+ Curl_addrinfo *ai;
+ Curl_addrinfo *prevai = NULL;
+ Curl_addrinfo *firstai = NULL;
+ struct sockaddr_in *addr;
+#ifdef ENABLE_IPV6
+ struct sockaddr_in6 *addr6;
+#endif
+ CURLcode result = CURLE_OK;
+ int i;
+ char *curr;
+
+ if(!he)
+ /* no input == no output! */
+ return NULL;
+
+ DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
+
+ for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
+
+ size_t ss_size;
+#ifdef ENABLE_IPV6
+ if(he->h_addrtype == AF_INET6)
+ ss_size = sizeof (struct sockaddr_in6);
+ else
+#endif
+ ss_size = sizeof (struct sockaddr_in);
+
+ if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
+ result = CURLE_OUT_OF_MEMORY;
+ break;
+ }
+ if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
+ result = CURLE_OUT_OF_MEMORY;
+ free(ai);
+ break;
+ }
+ if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
+ result = CURLE_OUT_OF_MEMORY;
+ free(ai->ai_canonname);
+ free(ai);
+ break;
+ }
+
+ if(!firstai)
+ /* store the pointer we want to return from this function */
+ firstai = ai;
+
+ if(prevai)
+ /* make the previous entry point to this */
+ prevai->ai_next = ai;
+
+ ai->ai_family = he->h_addrtype;
+
+ /* we return all names as STREAM, so when using this address for TFTP
+ the type must be ignored and conn->socktype be used instead! */
+ ai->ai_socktype = SOCK_STREAM;
+
+ ai->ai_addrlen = (curl_socklen_t)ss_size;
+
+ /* leave the rest of the struct filled with zero */
+
+ switch (ai->ai_family) {
+ case AF_INET:
+ addr = (void *)ai->ai_addr; /* storage area for this info */
+
+ memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
+ addr->sin_family = (unsigned short)(he->h_addrtype);
+ addr->sin_port = htons((unsigned short)port);
+ break;
+
+#ifdef ENABLE_IPV6
+ case AF_INET6:
+ addr6 = (void *)ai->ai_addr; /* storage area for this info */
+
+ memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
+ addr6->sin6_family = (unsigned short)(he->h_addrtype);
+ addr6->sin6_port = htons((unsigned short)port);
+ break;
+#endif
+ }
+
+ prevai = ai;
+ }
+
+ if(result) {
+ Curl_freeaddrinfo(firstai);
+ firstai = NULL;
+ }
+
+ return firstai;
+}
+
+
+struct namebuff {
+ struct hostent hostentry;
+ union {
+ struct in_addr ina4;
+#ifdef ENABLE_IPV6
+ struct in6_addr ina6;
+#endif
+ } addrentry;
+ char *h_addr_list[2];
+};
+
+
+/*
+ * Curl_ip2addr()
+ *
+ * This function takes an internet address, in binary form, as input parameter
+ * along with its address family and the string version of the address, and it
+ * returns a Curl_addrinfo chain filled in correctly with information for the
+ * given address/host
+ */
+
+CURL_STATIC Curl_addrinfo *
+Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
+{
+ Curl_addrinfo *ai;
+
+#if defined(__VMS) && \
+ defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
+#pragma pointer_size save
+#pragma pointer_size short
+#pragma message disable PTRMISMATCH
+#endif
+
+ struct hostent *h;
+ struct namebuff *buf;
+ char *addrentry;
+ char *hoststr;
+ size_t addrsize;
+
+ DEBUGASSERT(inaddr && hostname);
+
+ buf = malloc(sizeof(struct namebuff));
+ if(!buf)
+ return NULL;
+
+ hoststr = strdup(hostname);
+ if(!hoststr) {
+ free(buf);
+ return NULL;
+ }
+
+ switch(af) {
+ case AF_INET:
+ addrsize = sizeof(struct in_addr);
+ addrentry = (void *)&buf->addrentry.ina4;
+ memcpy(addrentry, inaddr, sizeof(struct in_addr));
+ break;
+#ifdef ENABLE_IPV6
+ case AF_INET6:
+ addrsize = sizeof(struct in6_addr);
+ addrentry = (void *)&buf->addrentry.ina6;
+ memcpy(addrentry, inaddr, sizeof(struct in6_addr));
+ break;
+#endif
+ default:
+ free(hoststr);
+ free(buf);
+ return NULL;
+ }
+
+ h = &buf->hostentry;
+ h->h_name = hoststr;
+ h->h_aliases = NULL;
+ h->h_addrtype = (short)af;
+ h->h_length = (short)addrsize;
+ h->h_addr_list = &buf->h_addr_list[0];
+ h->h_addr_list[0] = addrentry;
+ h->h_addr_list[1] = NULL; /* terminate list of entries */
+
+#if defined(__VMS) && \
+ defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
+#pragma pointer_size restore
+#pragma message enable PTRMISMATCH
+#endif
+
+ ai = Curl_he2ai(h, port);
+
+ free(hoststr);
+ free(buf);
+
+ return ai;
+}
+
+/*
+ * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
+ * allocated Curl_addrinfo struct and returns it.
+ */
+CURL_STATIC Curl_addrinfo *Curl_str2addr(char *address, int port)
+{
+ struct in_addr in;
+ if(Curl_inet_pton(AF_INET, address, &in) > 0)
+ /* This is a dotted IP address 123.123.123.123-style */
+ return Curl_ip2addr(AF_INET, &in, address, port);
+#ifdef ENABLE_IPV6
+ else {
+ struct in6_addr in6;
+ if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
+ /* This is a dotted IPv6 address ::1-style */
+ return Curl_ip2addr(AF_INET6, &in6, address, port);
+ }
+#endif
+ return NULL; /* bad input format */
+}
+
+#ifdef USE_UNIX_SOCKETS
+/**
+ * Given a path to a Unix domain socket, return a newly allocated Curl_addrinfo
+ * struct initialized with this path.
+ */
+CURL_STATIC Curl_addrinfo *Curl_unix2addr(const char *path)
+{
+ Curl_addrinfo *ai;
+ struct sockaddr_un *sa_un;
+ size_t path_len;
+
+ ai = calloc(1, sizeof(Curl_addrinfo));
+ if(!ai)
+ return NULL;
+ if((ai->ai_addr = calloc(1, sizeof(struct sockaddr_un))) == NULL) {
+ free(ai);
+ return NULL;
+ }
+ /* sun_path must be able to store the NUL-terminated path */
+ path_len = strlen(path);
+ if(path_len >= sizeof(sa_un->sun_path)) {
+ free(ai->ai_addr);
+ free(ai);
+ return NULL;
+ }
+
+ ai->ai_family = AF_UNIX;
+ ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
+ ai->ai_addrlen = (curl_socklen_t) sizeof(struct sockaddr_un);
+ sa_un = (void *) ai->ai_addr;
+ sa_un->sun_family = AF_UNIX;
+ memcpy(sa_un->sun_path, path, path_len + 1); /* copy NUL byte */
+ return ai;
+}
+#endif
+
+#if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
+/*
+ * curl_dofreeaddrinfo()
+ *
+ * This is strictly for memory tracing and are using the same style as the
+ * family otherwise present in memdebug.c. I put these ones here since they
+ * require a bunch of structs I didn't want to include in memdebug.c
+ */
+
+void
+curl_dofreeaddrinfo(struct addrinfo *freethis,
+ int line, const char *source)
+{
+ (freeaddrinfo)(freethis);
+ curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
+ source, line, (void *)freethis);
+}
+#endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
+
+
+#if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
+/*
+ * curl_dogetaddrinfo()
+ *
+ * This is strictly for memory tracing and are using the same style as the
+ * family otherwise present in memdebug.c. I put these ones here since they
+ * require a bunch of structs I didn't want to include in memdebug.c
+ */
+
+int
+curl_dogetaddrinfo(const char *hostname,
+ const char *service,
+ const struct addrinfo *hints,
+ struct addrinfo **result,
+ int line, const char *source)
+{
+ int res=(getaddrinfo)(hostname, service, hints, result);
+ if(0 == res)
+ /* success */
+ curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
+ source, line, (void *)*result);
+ else
+ curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
+ source, line);
+ return res;
+}
+#endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
+
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