/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2006, Daniel Stenberg, , 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: hostip6.c,v 1.37 2006-07-27 22:28:53 bagder Exp $ ***************************************************************************/ #include "setup.h" #include #ifdef NEED_MALLOC_H #include #endif #ifdef HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_NETDB_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #ifdef HAVE_STDLIB_H #include /* required for free() prototypes */ #endif #ifdef HAVE_UNISTD_H #include /* for the close() proto */ #endif #ifdef VMS #include #include #include #endif #ifdef HAVE_SETJMP_H #include #endif #ifdef HAVE_PROCESS_H #include #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" #define _MPRINTF_REPLACE /* use our functions only */ #include #if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL) #include "inet_ntoa_r.h" #endif #include "memory.h" /* The last #include file should be: */ #include "memdebug.h" /*********************************************************************** * Only for ipv6-enabled builds **********************************************************************/ #ifdef CURLRES_IPV6 #ifndef CURLRES_ARES /* * This is a wrapper function for freeing name information in a protocol * independent way. This takes care of using the appropriate underlaying * function. */ void Curl_freeaddrinfo(Curl_addrinfo *p) { freeaddrinfo(p); } #ifdef CURLRES_ASYNCH /* * Curl_addrinfo_copy() is used by the asynch callback to copy a given * address. But this is an ipv6 build and then we don't copy the address, we * just return the same pointer! */ Curl_addrinfo *Curl_addrinfo_copy(const void *orig, int port) { (void) port; return (Curl_addrinfo*)orig; } #endif /* CURLRES_ASYNCH */ #endif /* CURLRES_ARES */ #ifdef CURLDEBUG /* 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 wanna include in memdebug.c */ int curl_dogetaddrinfo(const char *hostname, const char *service, struct addrinfo *hints, struct addrinfo **result, int line, const char *source) { int res=(getaddrinfo)(hostname, service, hints, result); if(0 == res) { /* success */ if(logfile) fprintf(logfile, "ADDR %s:%d getaddrinfo() = %p\n", source, line, (void *)*result); } else { if(logfile) fprintf(logfile, "ADDR %s:%d getaddrinfo() failed\n", source, line); } return res; } /* * For CURLRES_ARS, this should be written using ares_gethostbyaddr() * (ignoring the fact c-ares doesn't return 'serv'). */ #ifdef HAVE_GETNAMEINFO 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 */ if(logfile) fprintf(logfile, "GETNAME %s:%d getnameinfo()\n", source, line); } else { if(logfile) fprintf(logfile, "GETNAME %s:%d getnameinfo() failed = %d\n", source, line, res); } return res; } #endif void curl_dofreeaddrinfo(struct addrinfo *freethis, int line, const char *source) { (freeaddrinfo)(freethis); if(logfile) fprintf(logfile, "ADDR %s:%d freeaddrinfo(%p)\n", source, line, (void *)freethis); } #endif /* CURLDEBUG */ /* * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've * been set and returns TRUE if they are OK. */ bool Curl_ipvalid(struct SessionHandle *data) { if(data->set.ip_version == CURL_IPRESOLVE_V6) { /* see if we have an IPv6 stack */ curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0); if (s == CURL_SOCKET_BAD) /* an ipv6 address was requested and we can't get/use one */ return FALSE; sclose(s); } return TRUE; } #if !defined(USE_THREADING_GETADDRINFO) && !defined(CURLRES_ARES) #ifdef DEBUG_ADDRINFO static void dump_addrinfo(struct connectdata *conn, const struct 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 : ""); if (Curl_printable_address(ai, buf, sizeof(buf))) printf("%s\n", buf); else printf("failed; %s\n", Curl_strerror(conn, Curl_sockerrno())); } } #else #define dump_addrinfo(x,y) #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_addrinfo *Curl_getaddrinfo(struct connectdata *conn, const char *hostname, int port, int *waitp) { struct addrinfo hints, *res; int error; char sbuf[NI_MAXSERV]; char *sbufptr = NULL; char addrbuf[128]; curl_socket_t s; int pf; struct SessionHandle *data = conn->data; *waitp=0; /* don't wait, we have the response now */ /* see if we have an IPv6 stack */ s = socket(PF_INET6, SOCK_DGRAM, 0); if (s == CURL_SOCKET_BAD) { /* Some non-IPv6 stacks have been found to make very slow name resolves * when PF_UNSPEC is used, so thus we switch to a mere PF_INET lookup if * the stack seems to be a non-ipv6 one. */ pf = PF_INET; } else { /* This seems to be an IPv6-capable stack, use PF_UNSPEC for the widest * possible checks. And close the socket again. */ sclose(s); /* * Check if a more limited name resolve has been requested. */ switch(data->set.ip_version) { case CURL_IPRESOLVE_V4: pf = PF_INET; break; case CURL_IPRESOLVE_V6: pf = PF_INET6; break; default: pf = PF_UNSPEC; break; } } 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 0 /* removed nov 8 2005 before 7.15.1 */ else hints.ai_flags = AI_CANONNAME; #endif if(port) { snprintf(sbuf, sizeof(sbuf), "%d", port); sbufptr=sbuf; } error = getaddrinfo(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 /* !USE_THREADING_GETADDRINFO && !CURLRES_ARES */ #endif /* ipv6 */