diff options
author | Dominick Meglio <dcm5151@esu.edu> | 2005-04-08 15:41:31 +0000 |
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committer | Dominick Meglio <dcm5151@esu.edu> | 2005-04-08 15:41:31 +0000 |
commit | a7ba0d908da23cdf79bf353eb7f8b00192cc11b8 (patch) | |
tree | ae1177e587e18ade97f63db202b4aea9926d30b8 /ares/ares_gethostbyaddr.c | |
parent | 2fc70e2c5d6cf45de85119106db96699556abd60 (diff) | |
download | curl-a7ba0d908da23cdf79bf353eb7f8b00192cc11b8.tar.gz |
Made ares_gethostbyaddr support IPv6 by specifying AF_INET6 as the family
Diffstat (limited to 'ares/ares_gethostbyaddr.c')
-rw-r--r-- | ares/ares_gethostbyaddr.c | 98 |
1 files changed, 75 insertions, 23 deletions
diff --git a/ares/ares_gethostbyaddr.c b/ares/ares_gethostbyaddr.c index 09e0dd39b..55f7aa9e1 100644 --- a/ares/ares_gethostbyaddr.c +++ b/ares/ares_gethostbyaddr.c @@ -12,7 +12,6 @@ * this software for any purpose. It is provided "as is" * without express or implied warranty. */ - #include "setup.h" #include <sys/types.h> @@ -39,10 +38,16 @@ #undef WIN32 #endif +union ares_addr { + struct in_addr addr4; + struct in6_addr addr6; +}; + struct addr_query { /* Arguments passed to ares_gethostbyaddr() */ ares_channel channel; - struct in_addr addr; + union ares_addr addr; + int family; ares_host_callback callback; void *arg; @@ -54,14 +59,21 @@ static void addr_callback(void *arg, int status, unsigned char *abuf, int alen); static void end_aquery(struct addr_query *aquery, int status, struct hostent *host); -static int file_lookup(struct in_addr *addr, struct hostent **host); +static int file_lookup(union ares_addr *addr, int family, struct hostent **host); void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen, int family, ares_host_callback callback, void *arg) { struct addr_query *aquery; - if (family != AF_INET || addrlen != sizeof(struct in_addr)) + if (family != AF_INET && family != AF_INET6) + { + callback(arg, ARES_ENOTIMP, NULL); + return; + } + + if ((family == AF_INET && addrlen != sizeof(struct in_addr)) || + (family == AF_INET6 && addrlen != sizeof(struct in6_addr))) { callback(arg, ARES_ENOTIMP, NULL); return; @@ -74,7 +86,11 @@ void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen, return; } aquery->channel = channel; - memcpy(&aquery->addr, addr, sizeof(aquery->addr)); + if (family == AF_INET) + memcpy(&aquery->addr.addr4, addr, sizeof(struct in_addr)); + else + memcpy(&aquery->addr.addr6, addr, sizeof(struct in6_addr)); + aquery->family = family; aquery->callback = callback; aquery->arg = arg; aquery->remaining_lookups = channel->lookups; @@ -85,7 +101,7 @@ void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen, static void next_lookup(struct addr_query *aquery) { const char *p; - char name[64]; + char name[128]; int a1, a2, a3, a4, status; struct hostent *host; unsigned long addr; @@ -95,18 +111,38 @@ static void next_lookup(struct addr_query *aquery) switch (*p) { case 'b': - addr = ntohl(aquery->addr.s_addr); - a1 = (int)((addr >> 24) & 0xff); - a2 = (int)((addr >> 16) & 0xff); - a3 = (int)((addr >> 8) & 0xff); - a4 = (int)(addr & 0xff); - sprintf(name, "%d.%d.%d.%d.in-addr.arpa", a4, a3, a2, a1); - aquery->remaining_lookups = p + 1; - ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback, - aquery); + if (aquery->family == AF_INET) + { + addr = ntohl(aquery->addr.addr4.s_addr); + a1 = (int)((addr >> 24) & 0xff); + a2 = (int)((addr >> 16) & 0xff); + a3 = (int)((addr >> 8) & 0xff); + a4 = (int)(addr & 0xff); + sprintf(name, "%d.%d.%d.%d.in-addr.arpa", a4, a3, a2, a1); + aquery->remaining_lookups = p + 1; + ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback, + aquery); + } + else + { + unsigned char *bytes; + bytes = (unsigned char *)&aquery->addr.addr6.s6_addr; + sprintf(name, "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.ip6.arpa", + bytes[15]&0xf, bytes[15] >> 4, bytes[14]&0xf, bytes[14] >> 4, + bytes[13]&0xf, bytes[13] >> 4, bytes[12]&0xf, bytes[12] >> 4, + bytes[11]&0xf, bytes[11] >> 4, bytes[10]&0xf, bytes[10] >> 4, + bytes[9]&0xf, bytes[9] >> 4, bytes[8]&0xf, bytes[8] >> 4, + bytes[7]&0xf, bytes[7] >> 4, bytes[6]&0xf, bytes[6] >> 4, + bytes[5]&0xf, bytes[5] >> 4, bytes[4]&0xf, bytes[4] >> 4, + bytes[3]&0xf, bytes[3] >> 4, bytes[2]&0xf, bytes[2] >> 4, + bytes[1]&0xf, bytes[1] >> 4, bytes[0]&0xf, bytes[0] >> 4); + aquery->remaining_lookups = p + 1; + ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback, + aquery); + } return; case 'f': - status = file_lookup(&aquery->addr, &host); + status = file_lookup(&aquery->addr, aquery->family, &host); if (status != ARES_ENOTFOUND) { end_aquery(aquery, status, host); @@ -125,8 +161,12 @@ static void addr_callback(void *arg, int status, unsigned char *abuf, int alen) if (status == ARES_SUCCESS) { - status = ares_parse_ptr_reply(abuf, alen, &aquery->addr, - sizeof(struct in_addr), AF_INET, &host); + if (aquery->family == AF_INET) + status = ares_parse_ptr_reply(abuf, alen, &aquery->addr.addr4, + sizeof(struct in_addr), AF_INET, &host); + else + status = ares_parse_ptr_reply(abuf, alen, &aquery->addr.addr6, + sizeof(struct in6_addr), AF_INET6, &host); end_aquery(aquery, status, host); } else if (status == ARES_EDESTRUCTION) @@ -144,7 +184,7 @@ static void end_aquery(struct addr_query *aquery, int status, free(aquery); } -static int file_lookup(struct in_addr *addr, struct hostent **host) +static int file_lookup(union ares_addr *addr, int family, struct hostent **host) { FILE *fp; int status; @@ -181,11 +221,23 @@ static int file_lookup(struct in_addr *addr, struct hostent **host) fp = fopen(PATH_HOSTS, "r"); if (!fp) return ARES_ENOTFOUND; - - while ((status = ares__get_hostent(fp, host)) == ARES_SUCCESS) + while ((status = ares__get_hostent(fp, family, host)) == ARES_SUCCESS) { - if (memcmp((*host)->h_addr, addr, sizeof(struct in_addr)) == 0) - break; + if (family != (*host)->h_addrtype) + { + ares_free_hostent(*host); + continue; + } + if (family == AF_INET) + { + if (memcmp((*host)->h_addr, &addr->addr4, sizeof(struct in_addr)) == 0) + break; + } + else if (family == AF_INET6) + { + if (memcmp((*host)->h_addr, &addr->addr6, sizeof(struct in6_addr)) == 0) + break; + } ares_free_hostent(*host); } fclose(fp); |