mirror of
https://github.com/moparisthebest/curl
synced 2024-10-31 15:45:12 -04:00
cab59b4c32
we really have no use for reverse lookups of the address. I truly hope these are the last reverse lookups we had lingering in the code!
296 lines
7.8 KiB
C
296 lines
7.8 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id$
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***************************************************************************/
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#include "setup.h"
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#include <string.h>
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#include <errno.h>
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#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
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#include <malloc.h>
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#else
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h> /* required for free() prototypes */
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h> /* for the close() proto */
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#endif
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#ifdef VMS
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#include <in.h>
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#include <inet.h>
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#include <stdlib.h>
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#endif
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#endif
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#ifdef HAVE_SETJMP_H
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#include <setjmp.h>
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#endif
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#ifdef WIN32
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#include <process.h>
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#endif
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#include "urldata.h"
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#include "sendf.h"
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#include "hostip.h"
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#include "hash.h"
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#include "share.h"
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#include "strerror.h"
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#include "url.h"
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#include "inet_pton.h"
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#include "connect.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
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#include "inet_ntoa_r.h"
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#endif
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#include "memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/***********************************************************************
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* Only for ipv6-enabled builds
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**********************************************************************/
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#ifdef CURLRES_IPV6
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/*
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* This is a wrapper function for freeing name information in a protocol
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* independent way. This takes care of using the appropriate underlaying
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* function.
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*/
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void Curl_freeaddrinfo(Curl_addrinfo *p)
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{
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freeaddrinfo(p);
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}
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#ifdef CURLRES_ASYNCH
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/*
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* Curl_addrinfo_copy() is used by the asynch callback to copy a given
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* address. But this is an ipv6 build and then we don't copy the address, we
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* just return the same pointer!
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*/
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Curl_addrinfo *Curl_addrinfo_copy(void *source, int port)
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{
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(void) port;
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return source;
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}
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#endif
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#ifdef CURLDEBUG
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/* These are strictly for memory tracing and are using the same style as the
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* family otherwise present in memdebug.c. I put these ones here since they
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* require a bunch of structs I didn't wanna include in memdebug.c
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*/
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int curl_dogetaddrinfo(char *hostname, char *service,
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struct addrinfo *hints,
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struct addrinfo **result,
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int line, const char *source)
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{
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int res=(getaddrinfo)(hostname, service, hints, result);
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if(0 == res) {
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/* success */
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if(logfile)
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fprintf(logfile, "ADDR %s:%d getaddrinfo() = %p\n",
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source, line, (void *)*result);
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}
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else {
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if(logfile)
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fprintf(logfile, "ADDR %s:%d getaddrinfo() failed\n",
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source, line);
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}
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return res;
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}
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int curl_dogetnameinfo(const struct sockaddr *sa, socklen_t salen,
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char *host, size_t hostlen,
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char *serv, size_t servlen, int flags,
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int line, const char *source)
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{
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int res=(getnameinfo)(sa, salen, host, hostlen, serv, servlen, flags);
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if(0 == res) {
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/* success */
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if(logfile)
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fprintf(logfile, "GETNAME %s:%d getnameinfo()\n",
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source, line);
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}
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else {
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if(logfile)
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fprintf(logfile, "GETNAME %s:%d getnameinfo() failed = %d\n",
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source, line, res);
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}
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return res;
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}
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void curl_dofreeaddrinfo(struct addrinfo *freethis,
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int line, const char *source)
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{
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(freeaddrinfo)(freethis);
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if(logfile)
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fprintf(logfile, "ADDR %s:%d freeaddrinfo(%p)\n",
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source, line, (void *)freethis);
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}
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#endif
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/*
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* Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
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* been set and returns TRUE if they are OK.
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*/
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bool Curl_ipvalid(struct SessionHandle *data)
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{
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if(data->set.ip_version == CURL_IPRESOLVE_V6) {
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/* see if we have an IPv6 stack */
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curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
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if (s == CURL_SOCKET_BAD)
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/* an ipv6 address was requested and we can't get/use one */
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return FALSE;
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sclose(s);
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}
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return TRUE;
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}
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#ifndef USE_THREADING_GETADDRINFO
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#ifdef DEBUG_ADDRINFO
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static void dump_addrinfo(struct connectdata *conn, const struct addrinfo *ai)
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{
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printf("dump_addrinfo:\n");
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for ( ; ai; ai = ai->ai_next) {
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char buf[INET6_ADDRSTRLEN];
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printf(" fam %2d, CNAME %s, ",
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ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>");
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if (Curl_printable_address(ai, buf, sizeof(buf)))
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printf("%s\n", buf);
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else
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printf("failed; %s\n", Curl_strerror(conn, Curl_ourerrno()));
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}
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}
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#else
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#define dump_addrinfo(x,y)
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#endif
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/*
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* Curl_getaddrinfo() when built ipv6-enabled (non-threading version).
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*
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* Returns name information about the given hostname and port number. If
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* successful, the 'addrinfo' is returned and the forth argument will point to
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* memory we need to free after use. That memory *MUST* be freed with
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* Curl_freeaddrinfo(), nothing else.
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*/
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Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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char *hostname,
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int port,
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int *waitp)
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{
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struct addrinfo hints, *res;
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int error;
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char sbuf[NI_MAXSERV];
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char *sbufptr = NULL;
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char addrbuf[128];
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curl_socket_t s;
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int pf;
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struct SessionHandle *data = conn->data;
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*waitp=0; /* don't wait, we have the response now */
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/* see if we have an IPv6 stack */
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s = socket(PF_INET6, SOCK_DGRAM, 0);
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if (s < 0) {
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/* Some non-IPv6 stacks have been found to make very slow name resolves
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* when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if
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* the stack seems to be a non-ipv6 one. */
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pf = PF_INET;
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}
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else {
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/* This seems to be an IPv6-capable stack, use PF_UNSPEC for the widest
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* possible checks. And close the socket again.
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*/
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sclose(s);
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/*
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* Check if a more limited name resolve has been requested.
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*/
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switch(data->set.ip_version) {
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case CURL_IPRESOLVE_V4:
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pf = PF_INET;
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break;
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case CURL_IPRESOLVE_V6:
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pf = PF_INET6;
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break;
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default:
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pf = PF_UNSPEC;
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break;
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}
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}
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = pf;
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hints.ai_socktype = conn->socktype;
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if((1 == Curl_inet_pton(AF_INET, hostname, addrbuf)) ||
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(1 == Curl_inet_pton(AF_INET6, hostname, addrbuf))) {
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/* the given address is numerical only, prevent a reverse lookup */
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hints.ai_flags = AI_NUMERICHOST;
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}
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#if 0 /* removed nov 8 2005 before 7.15.1 */
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else
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hints.ai_flags = AI_CANONNAME;
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#endif
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if(port) {
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snprintf(sbuf, sizeof(sbuf), "%d", port);
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sbufptr=sbuf;
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}
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error = getaddrinfo(hostname, sbufptr, &hints, &res);
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if (error) {
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infof(data, "getaddrinfo(3) failed for %s:%d\n", hostname, port);
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return NULL;
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}
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dump_addrinfo(conn, res);
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return res;
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}
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#endif /* USE_THREADING_GETADDRINFO */
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#endif /* ipv6 */
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