diff options
| author | Ricard Wanderlof <ricard.wanderlof@axis.com> | 2008-06-27 09:08:44 +0000 |
|---|---|---|
| committer | Ricard Wanderlof <ricard.wanderlof@axis.com> | 2008-06-27 09:08:44 +0000 |
| commit | 6c1d86dcdb30f52d7f64179b982b253f1ba6951c (patch) | |
| tree | 3886a2a7d4adb43be8ce07188790e27b6c50c22b /libc/inet/getaddrinfo.c | |
| parent | 516a518c9dfdbdc3c930626f8eeef3d0b4d71236 (diff) | |
Added support for the AI_ADDRCONFIG flag in the hints->ai_flags parameter to getaddrinfo(3).
Diffstat (limited to 'libc/inet/getaddrinfo.c')
| -rw-r--r-- | libc/inet/getaddrinfo.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/libc/inet/getaddrinfo.c b/libc/inet/getaddrinfo.c index e3caf6f0d..0bc66e393 100644 --- a/libc/inet/getaddrinfo.c +++ b/libc/inet/getaddrinfo.c @@ -66,6 +66,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #include <sys/un.h> #include <sys/utsname.h> #include <net/if.h> +#include <ifaddrs.h> /* Experimentally off - libc_hidden_proto(memcpy) */ /* Experimentally off - libc_hidden_proto(memset) */ @@ -156,19 +157,29 @@ static const struct addrinfo default_hints = { 0, PF_UNSPEC, 0, 0, 0, NULL, NULL, NULL }; #endif - static int addrconfig (sa_family_t af) { int s; int ret; int saved_errno = errno; - s = socket(af, SOCK_DGRAM, 0); - if (s < 0) - ret = (errno == EMFILE) ? 1 : 0; + bool seen_ipv4; + bool seen_ipv6; + + __check_pf(&seen_ipv4, &seen_ipv6); + if (af == AF_INET) + ret = (int)seen_ipv4; + else if (af == AF_INET6) + ret = (int)seen_ipv6; else { - close(s); - ret = 1; + s = socket(af, SOCK_DGRAM, 0); + if (s < 0) + ret = (errno == EMFILE) ? 1 : 0; + else + { + close(s); + ret = 1; + } } __set_errno (saved_errno); return ret; @@ -373,6 +384,9 @@ gaih_inet (const char *name, const struct gaih_service *service, int rc; int v4mapped = (req->ai_family == PF_UNSPEC || req->ai_family == PF_INET6) && (req->ai_flags & AI_V4MAPPED); + bool seen_ipv4; + bool seen_ipv6; + __check_pf(&seen_ipv4, &seen_ipv6); if (req->ai_protocol || req->ai_socktype) { @@ -560,14 +574,16 @@ gaih_inet (const char *name, const struct gaih_service *service, #if defined __UCLIBC_HAS_IPV6__ if (req->ai_family == AF_UNSPEC || req->ai_family == AF_INET6) - gethosts (AF_INET6, struct in6_addr); + if (!(req->ai_flags & AI_ADDRCONFIG) || seen_ipv6) + gethosts (AF_INET6, struct in6_addr); #endif no_inet6_data = no_data; if (req->ai_family == AF_INET || (!v4mapped && req->ai_family == AF_UNSPEC) || (v4mapped && (no_inet6_data != 0 || (req->ai_flags & AI_ALL)))) - gethosts (AF_INET, struct in_addr); + if (!(req->ai_flags & AI_ADDRCONFIG) || seen_ipv4) + gethosts (AF_INET, struct in_addr); if (no_data != 0 && no_inet6_data != 0) { @@ -698,6 +714,14 @@ gaih_inet (const char *name, const struct gaih_service *service, #endif for (st2 = st; st2 != NULL; st2 = st2->next) { + if (req->ai_flags & AI_ADDRCONFIG) { + if (family == AF_INET && !seen_ipv4) + break; +#if defined __UCLIBC_HAS_IPV6__ + else if (family == AF_INET6 && !seen_ipv6) + break; +#endif + } *pai = malloc (sizeof (struct addrinfo) + socklen + namelen); if (*pai == NULL) return -EAI_MEMORY; @@ -859,7 +883,10 @@ getaddrinfo (const char *name, const char *service, if (hints->ai_family == g->family || hints->ai_family == AF_UNSPEC) { if ((hints->ai_flags & AI_ADDRCONFIG) && !addrconfig(g->family)) + { + ++g; continue; + } j++; if (pg == NULL || pg->gaih != g->gaih) { |