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return the requested string as the "canonical name" for numeric addresses

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previously NULL was returned in ai_canonname, resulting in crashes in
some callers. this behavior was incorrect. note however that the new
behavior differs from glibc, which performs reverse dns lookups. POSIX
is very clear that a reverse DNS lookup must not be performed for
numeric addresses.
This commit is contained in:
Rich Felker 2011-04-08 08:14:28 -04:00
parent d4fbebe18d
commit e2cc0bee11
1 changed files with 1 additions and 0 deletions
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src/network/getaddrinfo.c
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@ -117,6 +117,7 @@ int getaddrinfo(const char *host, const char *serv, const struct addrinfo *hint,
buf->ai.ai_addr = (void *)&buf->sa;
buf->ai.ai_addrlen = family==AF_INET6 ? sizeof sa.sin6 : sizeof sa.sin;
buf->ai.ai_family = family;
buf->ai.ai_canonname = (char *)host;
buf->sa = sa;
buf->sa.sin.sin_port = port;
*res = &buf->ai;