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-rw-r--r--lib/curl_addrinfo.c332
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diff --git a/lib/curl_addrinfo.c b/lib/curl_addrinfo.c
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+++ b/lib/curl_addrinfo.c
@@ -0,0 +1,332 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2008, 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.
+ *
+ * $Id$
+ ***************************************************************************/
+
+#include "setup.h"
+
+#include <curl/curl.h>
+
+#ifdef NEED_MALLOC_H
+# include <malloc.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+# include <sys/socket.h>
+#endif
+#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>
+# include <stdlib.h>
+#endif
+
+#if defined(NETWARE) && defined(__NOVELL_LIBC__)
+# undef in_addr_t
+# define in_addr_t unsigned long
+#endif
+
+#include "curl_addrinfo.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+#include "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.
+ */
+
+void
+Curl_freeaddrinfo(Curl_addrinfo *cahead)
+{
+ Curl_addrinfo *ca, *canext;
+
+ for(ca = cahead; ca != NULL; ca = canext) {
+
+ if(ca->ai_addr)
+ free(ca->ai_addr);
+
+ if(ca->ai_canonname)
+ free(ca->ai_canonname);
+
+ canext = ca->ai_next;
+
+ free(ca);
+ }
+}
+
+
+#ifdef HAVE_GETADDRINFO
+/*
+ * Curl_getaddrinfo_ex()
+ *
+ * This is a warapper 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.
+ */
+
+int
+Curl_getaddrinfo_ex(const char *nodename,
+ const char *servname,
+ const struct addrinfo *hints,
+ Curl_addrinfo **result)
+{
+ const struct addrinfo *ainext;
+ const struct addrinfo *ai;
+ struct addrinfo *aihead;
+ Curl_addrinfo *cafirst = NULL;
+ Curl_addrinfo *calast = NULL;
+ Curl_addrinfo *ca;
+ int error;
+
+ *result = NULL; /* assume failure */
+
+ error = getaddrinfo(nodename, servname, hints, &aihead);
+ if(error)
+ return error;
+
+ for(ai = aihead; ai != NULL; ai = ainext) {
+
+ 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 structure. */
+
+ 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 = 0;
+ ca->ai_addr = NULL;
+ ca->ai_canonname = NULL;
+ ca->ai_next = NULL;
+
+ if((ai->ai_addrlen > 0) && (ai->ai_addr != NULL)) {
+ ca->ai_addrlen = ai->ai_addrlen;
+ if((ca->ai_addr = malloc(ca->ai_addrlen)) == NULL) {
+ error = EAI_MEMORY;
+ free(ca);
+ break;
+ }
+ memcpy(ca->ai_addr, ai->ai_addr, ca->ai_addrlen);
+ }
+
+ if(ai->ai_canonname != NULL) {
+ if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
+ error = EAI_MEMORY;
+ if(ca->ai_addr)
+ 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;
+
+ /* fetch next element fom the addrinfo list */
+ ainext = ai->ai_next;
+ }
+
+ /* destroy the addrinfo list */
+ if(aihead)
+ freeaddrinfo(aihead);
+
+ /* if we failed, also destroy the Curl_addrinfo list */
+ if(error) {
+ Curl_freeaddrinfo(cafirst);
+ cafirst = NULL;
+ }
+
+ *result = cafirst;
+
+ return error; /* This is not a CURLcode */
+}
+#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;
+ * 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_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;
+
+ for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
+
+ int 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 = ss_size;
+
+ /* leave the rest of the struct filled with zero */
+
+ switch (ai->ai_family) {
+ case AF_INET:
+ addr = (struct sockaddr_in *)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 = (struct sockaddr_in6 *)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 != CURLE_OK) {
+ /* Use parenthesis to prevent memdebug from replacing this */
+ Curl_freeaddrinfo(firstai);
+ firstai = NULL;
+ }
+
+ return firstai;
+}
+
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