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Diffstat (limited to 'Utilities/cmcurl/hostip6.c')
| -rw-r--r-- | Utilities/cmcurl/hostip6.c | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/Utilities/cmcurl/hostip6.c b/Utilities/cmcurl/hostip6.c new file mode 100644 index 000000000..c8bbdb5e9 --- /dev/null +++ b/Utilities/cmcurl/hostip6.c @@ -0,0 +1,306 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2006, 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 <string.h> + +#ifdef NEED_MALLOC_H +#include <malloc.h> +#endif +#ifdef HAVE_SYS_TYPES_H +#include <sys/types.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 HAVE_STDLIB_H +#include <stdlib.h> /* required for free() prototypes */ +#endif +#ifdef HAVE_UNISTD_H +#include <unistd.h> /* for the close() proto */ +#endif +#ifdef VMS +#include <in.h> +#include <inet.h> +#include <stdlib.h> +#endif + +#ifdef HAVE_SETJMP_H +#include <setjmp.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" + +#define _MPRINTF_REPLACE /* use our functions only */ +#include <curl/mprintf.h> + +#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 : "<none>"); + 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 */ + |