diff options
Diffstat (limited to 'libcurl/src/lib/hostip6.c')
| -rw-r--r-- | libcurl/src/lib/hostip6.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/libcurl/src/lib/hostip6.c b/libcurl/src/lib/hostip6.c new file mode 100644 index 0000000..862bfae --- /dev/null +++ b/libcurl/src/lib/hostip6.c @@ -0,0 +1,221 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, 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 "urldata.h"
+#include "sendf.h"
+#include "hostip.h"
+#include "hash.h"
+#include "share.h"
+#include "strerror.h"
+#include "url.h"
+#include "inet_pton.h"
+#include "connect.h"
+#include "curl_printf.h"
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/***********************************************************************
+ * Only for IPv6-enabled builds
+ **********************************************************************/
+#ifdef CURLRES_IPV6
+
+
+#if defined(CURLDEBUG) && defined(HAVE_GETNAMEINFO)
+/* These are 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
+ */
+
+/*
+ * For CURLRES_ARS, this should be written using ares_gethostbyaddr()
+ * (ignoring the fact c-ares doesn't return 'serv').
+ */
+
+int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
+ GETNAMEINFO_TYPE_ARG2 salen,
+ char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
+ char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
+ GETNAMEINFO_TYPE_ARG7 flags,
+ int line, const char *source)
+{
+ int res = (getnameinfo)(sa, salen,
+ host, hostlen,
+ serv, servlen,
+ flags);
+ if(0 == res)
+ /* success */
+ curl_memlog("GETNAME %s:%d getnameinfo()\n",
+ source, line);
+ else
+ curl_memlog("GETNAME %s:%d getnameinfo() failed = %d\n",
+ source, line, res);
+ return res;
+}
+#endif /* defined(CURLDEBUG) && defined(HAVE_GETNAMEINFO) */
+
+/*
+ * Curl_ipv6works() returns TRUE if IPv6 seems to work.
+ */
+CURL_STATIC bool Curl_ipv6works(void)
+{
+ /* the nature of most system is that IPv6 status doesn't come and go
+ during a program's lifetime so we only probe the first time and then we
+ have the info kept for fast re-use */
+ static int ipv6_works = -1;
+ if(-1 == ipv6_works) {
+ /* probe to see if we have a working IPv6 stack */
+ curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
+ if(s == CURL_SOCKET_BAD)
+ /* an IPv6 address was requested but we can't get/use one */
+ ipv6_works = 0;
+ else {
+ ipv6_works = 1;
+ Curl_closesocket(NULL, s);
+ }
+ }
+ return (ipv6_works>0)?TRUE:FALSE;
+}
+
+/*
+ * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
+ * been set and returns TRUE if they are OK.
+ */
+CURL_STATIC bool Curl_ipvalid(struct connectdata *conn)
+{
+ if(conn->ip_version == CURL_IPRESOLVE_V6)
+ return Curl_ipv6works();
+ return TRUE;
+}
+
+#if defined(CURLRES_SYNCH)
+
+#ifdef DEBUG_ADDRINFO
+static void dump_addrinfo(struct connectdata *conn, const Curl_addrinfo *ai)
+{
+ printf("dump_addrinfo:\n");
+ for(; ai; ai = ai->ai_next) {
+ char buf[INET6_ADDRSTRLEN];
+
+ printf(" fam %2d, CNAME %s, ",
+ ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>");
+ if(Curl_printable_address(ai, buf, sizeof(buf)))
+ printf("%s\n", buf);
+ else
+ printf("failed; %s\n", Curl_strerror(conn, SOCKERRNO));
+ }
+}
+#else
+#define dump_addrinfo(x,y) Curl_nop_stmt
+#endif
+
+/*
+ * Curl_getaddrinfo() when built IPv6-enabled (non-threading and
+ * non-ares version).
+ *
+ * Returns name information about the given hostname and port number. If
+ * successful, the 'addrinfo' is returned and the forth argument will point to
+ * memory we need to free after use. That memory *MUST* be freed with
+ * Curl_freeaddrinfo(), nothing else.
+ */
+CURL_STATIC Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
+ const char *hostname,
+ int port,
+ int *waitp)
+{
+ struct addrinfo hints;
+ Curl_addrinfo *res;
+ int error;
+ char sbuf[12];
+ char *sbufptr = NULL;
+ char addrbuf[128];
+ int pf;
+ struct SessionHandle *data = conn->data;
+
+ *waitp = 0; /* synchronous response only */
+
+ /*
+ * Check if a limited name resolve has been requested.
+ */
+ switch(conn->ip_version) {
+ case CURL_IPRESOLVE_V4:
+ pf = PF_INET;
+ break;
+ case CURL_IPRESOLVE_V6:
+ pf = PF_INET6;
+ break;
+ default:
+ pf = PF_UNSPEC;
+ break;
+ }
+
+ if((pf != PF_INET) && !Curl_ipv6works())
+ /* The stack seems to be a non-IPv6 one */
+ pf = PF_INET;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = pf;
+ hints.ai_socktype = conn->socktype;
+
+ if((1 == Curl_inet_pton(AF_INET, hostname, addrbuf)) ||
+ (1 == Curl_inet_pton(AF_INET6, hostname, addrbuf))) {
+ /* the given address is numerical only, prevent a reverse lookup */
+ hints.ai_flags = AI_NUMERICHOST;
+ }
+
+ if(port) {
+ snprintf(sbuf, sizeof(sbuf), "%d", port);
+ sbufptr=sbuf;
+ }
+ error = Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &res);
+ if(error) {
+ infof(data, "getaddrinfo(3) failed for %s:%d\n", hostname, port);
+ return NULL;
+ }
+
+ dump_addrinfo(conn, res);
+
+ return res;
+}
+#endif /* CURLRES_SYNCH */
+#endif /* CURLRES_IPV6 */
+
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