diff options
author | Daniel Stenberg <daniel@haxx.se> | 2010-03-24 10:34:30 +0100 |
---|---|---|
committer | Daniel Stenberg <daniel@haxx.se> | 2010-03-24 10:34:30 +0100 |
commit | 4259d2df7dd95637a4b1e3fb174fe5e5aef81069 (patch) | |
tree | 8abd5ab61fbacf160f9084a44613fcc4b20e8483 /ares/ares_getnameinfo.c | |
parent | 4b351d018e3d6691191fd653a17f14f4a31e0b4c (diff) |
remove the ares subtree
c-ares is now hosted entirely separate from the curl project
see http://c-ares.haxx.se/ for all details concerning c-ares,
its source repository and more.
Diffstat (limited to 'ares/ares_getnameinfo.c')
-rw-r--r-- | ares/ares_getnameinfo.c | 413 |
1 files changed, 0 insertions, 413 deletions
diff --git a/ares/ares_getnameinfo.c b/ares/ares_getnameinfo.c deleted file mode 100644 index 77752df02..000000000 --- a/ares/ares_getnameinfo.c +++ /dev/null @@ -1,413 +0,0 @@ -/* $Id$ */ - -/* Copyright 2005 by Dominick Meglio - * - * Permission to use, copy, modify, and distribute this - * software and its documentation for any purpose and without - * fee is hereby granted, provided that the above copyright - * notice appear in all copies and that both that copyright - * notice and this permission notice appear in supporting - * documentation, and that the name of M.I.T. not be used in - * advertising or publicity pertaining to distribution of the - * software without specific, written prior permission. - * M.I.T. makes no representations about the suitability of - * this software for any purpose. It is provided "as is" - * without express or implied warranty. - */ -#include "ares_setup.h" - -#ifdef HAVE_GETSERVBYPORT_R -# if !defined(GETSERVBYPORT_R_ARGS) || \ - (GETSERVBYPORT_R_ARGS < 4) || (GETSERVBYPORT_R_ARGS > 6) -# error "you MUST specifiy a valid number of arguments for getservbyport_r" -# endif -#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_ARPA_NAMESER_H -# include <arpa/nameser.h> -#else -# include "nameser.h" -#endif -#ifdef HAVE_ARPA_NAMESER_COMPAT_H -# include <arpa/nameser_compat.h> -#endif - -#ifdef HAVE_NET_IF_H -#include <net/if.h> -#endif - -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include "ares.h" -#include "ares_ipv6.h" -#include "inet_ntop.h" -#include "ares_private.h" - -struct nameinfo_query { - ares_nameinfo_callback callback; - void *arg; - union { - struct sockaddr_in addr4; - struct sockaddr_in6 addr6; - } addr; - int family; - int flags; - int timeouts; -}; - -#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID -#define IPBUFSIZ \ - (sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255") + IF_NAMESIZE) -#else -#define IPBUFSIZ \ - (sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")) -#endif - -static void nameinfo_callback(void *arg, int status, int timeouts, struct hostent *host); -static char *lookup_service(unsigned short port, int flags, - char *buf, size_t buflen); -#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID -static void append_scopeid(struct sockaddr_in6 *addr6, unsigned int scopeid, - char *buf, size_t buflen); -#endif -static char *ares_striendstr(const char *s1, const char *s2); - -void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa, - ares_socklen_t salen, - int flags, ares_nameinfo_callback callback, void *arg) -{ - struct sockaddr_in *addr = NULL; - struct sockaddr_in6 *addr6 = NULL; - struct nameinfo_query *niquery; - unsigned int port = 0; - - /* Verify the buffer size */ - if (salen == sizeof(struct sockaddr_in)) - { - addr = (struct sockaddr_in *)sa; - port = addr->sin_port; - } - else if (salen == sizeof(struct sockaddr_in6)) - { - addr6 = (struct sockaddr_in6 *)sa; - port = addr6->sin6_port; - } - else - { - callback(arg, ARES_ENOTIMP, 0, NULL, NULL); - return; - } - - /* If neither, assume they want a host */ - if (!(flags & ARES_NI_LOOKUPSERVICE) && !(flags & ARES_NI_LOOKUPHOST)) - flags |= ARES_NI_LOOKUPHOST; - - /* All they want is a service, no need for DNS */ - if ((flags & ARES_NI_LOOKUPSERVICE) && !(flags & ARES_NI_LOOKUPHOST)) - { - char buf[33], *service; - - service = lookup_service((unsigned short)(port & 0xffff), - flags, buf, sizeof(buf)); - callback(arg, ARES_SUCCESS, 0, NULL, service); - return; - } - - /* They want a host lookup */ - if ((flags & ARES_NI_LOOKUPHOST)) - { - /* A numeric host can be handled without DNS */ - if ((flags & ARES_NI_NUMERICHOST)) - { - char ipbuf[IPBUFSIZ]; - char srvbuf[33]; - char *service = NULL; - ipbuf[0] = 0; - - /* Specifying not to lookup a host, but then saying a host - * is required has to be illegal. - */ - if (flags & ARES_NI_NAMEREQD) - { - callback(arg, ARES_EBADFLAGS, 0, NULL, NULL); - return; - } - if (salen == sizeof(struct sockaddr_in6)) - { - ares_inet_ntop(AF_INET6, &addr6->sin6_addr, ipbuf, IPBUFSIZ); - /* If the system supports scope IDs, use it */ -#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID - append_scopeid(addr6, flags, ipbuf, sizeof(ipbuf)); -#endif - } - else - { - ares_inet_ntop(AF_INET, &addr->sin_addr, ipbuf, IPBUFSIZ); - } - /* They also want a service */ - if (flags & ARES_NI_LOOKUPSERVICE) - service = lookup_service((unsigned short)(port & 0xffff), - flags, srvbuf, sizeof(srvbuf)); - callback(arg, ARES_SUCCESS, 0, ipbuf, service); - return; - } - /* This is where a DNS lookup becomes necessary */ - else - { - niquery = malloc(sizeof(struct nameinfo_query)); - if (!niquery) - { - callback(arg, ARES_ENOMEM, 0, NULL, NULL); - return; - } - niquery->callback = callback; - niquery->arg = arg; - niquery->flags = flags; - niquery->timeouts = 0; - if (sa->sa_family == AF_INET) - { - niquery->family = AF_INET; - memcpy(&niquery->addr.addr4, addr, sizeof(addr)); - ares_gethostbyaddr(channel, &addr->sin_addr, - sizeof(struct in_addr), AF_INET, - nameinfo_callback, niquery); - } - else - { - niquery->family = AF_INET6; - memcpy(&niquery->addr.addr6, addr6, sizeof(addr6)); - ares_gethostbyaddr(channel, &addr6->sin6_addr, - sizeof(struct ares_in6_addr), AF_INET6, - nameinfo_callback, niquery); - } - } - } -} - -static void nameinfo_callback(void *arg, int status, int timeouts, struct hostent *host) -{ - struct nameinfo_query *niquery = (struct nameinfo_query *) arg; - char srvbuf[33]; - char *service = NULL; - - niquery->timeouts += timeouts; - if (status == ARES_SUCCESS) - { - /* They want a service too */ - if (niquery->flags & ARES_NI_LOOKUPSERVICE) - { - if (niquery->family == AF_INET) - service = lookup_service(niquery->addr.addr4.sin_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - else - service = lookup_service(niquery->addr.addr6.sin6_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - } - /* NOFQDN means we have to strip off the domain name portion. - We do this by determining our own domain name, then searching the string - for this domain name and removing it. - */ -#ifdef HAVE_GETHOSTNAME - if (niquery->flags & ARES_NI_NOFQDN) - { - char buf[255]; - char *domain; - gethostname(buf, 255); - if ((domain = strchr(buf, '.'))) - { - char *end = ares_striendstr(host->h_name, domain); - if (end) - *end = 0; - } - } -#endif - niquery->callback(niquery->arg, ARES_SUCCESS, niquery->timeouts, (char *)(host->h_name), - service); - return; - } - /* We couldn't find the host, but it's OK, we can use the IP */ - else if (status == ARES_ENOTFOUND && !(niquery->flags & ARES_NI_NAMEREQD)) - { - char ipbuf[IPBUFSIZ]; - if (niquery->family == AF_INET) - ares_inet_ntop(AF_INET, &niquery->addr.addr4.sin_addr, ipbuf, IPBUFSIZ); - else - { - ares_inet_ntop(AF_INET6, &niquery->addr.addr6.sin6_addr, ipbuf, IPBUFSIZ); -#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID - append_scopeid(&niquery->addr.addr6, niquery->flags, ipbuf, sizeof(ipbuf)); -#endif - } - /* They want a service too */ - if (niquery->flags & ARES_NI_LOOKUPSERVICE) - { - if (niquery->family == AF_INET) - service = lookup_service(niquery->addr.addr4.sin_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - else - service = lookup_service(niquery->addr.addr6.sin6_port, - niquery->flags, srvbuf, sizeof(srvbuf)); - } - niquery->callback(niquery->arg, ARES_SUCCESS, niquery->timeouts, ipbuf, service); - return; - } - niquery->callback(niquery->arg, status, niquery->timeouts, NULL, NULL); - free(niquery); -} - -static char *lookup_service(unsigned short port, int flags, - char *buf, size_t buflen) -{ - const char *proto; - struct servent *sep; -#ifdef HAVE_GETSERVBYPORT_R - struct servent se; -#endif - char tmpbuf[4096]; - - if (port) - { - if (flags & ARES_NI_NUMERICSERV) - sep = NULL; - else - { - if (flags & ARES_NI_UDP) - proto = "udp"; - else if (flags & ARES_NI_SCTP) - proto = "sctp"; - else if (flags & ARES_NI_DCCP) - proto = "dccp"; - else - proto = "tcp"; -#ifdef HAVE_GETSERVBYPORT_R - sep = &se; - memset(tmpbuf, 0, sizeof(tmpbuf)); -#if GETSERVBYPORT_R_ARGS == 6 - if (getservbyport_r(port, proto, &se, (void *)tmpbuf, sizeof(tmpbuf), &sep) != 0) - sep = NULL; -#elif GETSERVBYPORT_R_ARGS == 5 - sep = getservbyport_r(port, proto, &se, (void *)tmpbuf, sizeof(tmpbuf)); -#elif GETSERVBYPORT_R_ARGS == 4 - if (getservbyport_r(port, proto, &se, (void *)tmpbuf) != 0) - sep = NULL; -#else - /* Lets just hope the OS uses TLS! */ - sep = getservbyport(port, proto); -#endif -#else - /* Lets just hope the OS uses TLS! */ -#if (defined(NETWARE) && !defined(__NOVELL_LIBC__)) - sep = getservbyport(port, (char*)proto); -#else - sep = getservbyport(port, proto); -#endif -#endif - } - if (sep && sep->s_name) - /* get service name */ - strcpy(tmpbuf, sep->s_name); - else - /* get port as a string */ - sprintf(tmpbuf, "%u", (unsigned int)ntohs(port)); - if (strlen(tmpbuf) < buflen) - /* return it if buffer big enough */ - strcpy(buf, tmpbuf); - else - /* avoid reusing previous one */ - buf[0] = '\0'; - return buf; - } - buf[0] = '\0'; - return NULL; -} - -#ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID -static void append_scopeid(struct sockaddr_in6 *addr6, unsigned int flags, - char *buf, size_t buflen) -{ -#ifdef HAVE_IF_INDEXTONAME - int is_ll, is_mcll; -#endif - char fmt_u[] = "%u"; - char fmt_lu[] = "%lu"; - char tmpbuf[IF_NAMESIZE + 2]; - size_t bufl; - char *fmt = (sizeof(addr6->sin6_scope_id) > sizeof(unsigned int))?fmt_lu:fmt_u; - - tmpbuf[0] = '%'; - -#ifdef HAVE_IF_INDEXTONAME - is_ll = IN6_IS_ADDR_LINKLOCAL(&addr6->sin6_addr); - is_mcll = IN6_IS_ADDR_MC_LINKLOCAL(&addr6->sin6_addr); - if ((flags & ARES_NI_NUMERICSCOPE) || - (!is_ll && !is_mcll)) - { - sprintf(&tmpbuf[1], fmt, addr6->sin6_scope_id); - } - else - { - if (if_indextoname(addr6->sin6_scope_id, &tmpbuf[1]) == NULL) - sprintf(&tmpbuf[1], fmt, addr6->sin6_scope_id); - } -#else - sprintf(&tmpbuf[1], fmt, addr6->sin6_scope_id); - (void) flags; -#endif - tmpbuf[IF_NAMESIZE + 1] = '\0'; - bufl = strlen(buf); - - if(bufl + strlen(tmpbuf) < buflen) - /* only append the scopeid string if it fits in the target buffer */ - strcpy(&buf[bufl], tmpbuf); -} -#endif - -/* Determines if s1 ends with the string in s2 (case-insensitive) */ -static char *ares_striendstr(const char *s1, const char *s2) -{ - const char *c1, *c2, *c1_begin; - int lo1, lo2; - size_t s1_len = strlen(s1), s2_len = strlen(s2); - - /* If the substr is longer than the full str, it can't match */ - if (s2_len > s1_len) - return NULL; - - /* Jump to the end of s1 minus the length of s2 */ - c1_begin = s1+s1_len-s2_len; - c1 = (const char *)c1_begin; - c2 = s2; - while (c2 < s2+s2_len) - { - lo1 = tolower(*c1); - lo2 = tolower(*c2); - if (lo1 != lo2) - return NULL; - else - { - c1++; - c2++; - } - } - if (c2 == c1 && c2 == NULL) - return (char *)c1_begin; - return NULL; -} |