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ares_getnameinfo: Validate socket address family and length.

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Validate socket address family and that the socket address length is appropriate
for the specified family. Failure is reported with ARES_EBADFAMILY in callback.
This commit is contained in:
Yang Tse
2010-11-16 19:41:03 +01:00
parent 690f9a726c
commit 85520d66e0
1 changed files with 6 additions and 4 deletions
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ares_getnameinfo.c
+6 -4
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@@ -99,20 +99,22 @@ void ares_getnameinfo(ares_channel channel, const struct sockaddr *sa,
struct nameinfo_query *niquery;
unsigned int port = 0;
/* Verify the buffer size */
if (salen == sizeof(struct sockaddr_in))
/* Validate socket address family and length */
if ((sa->sa_family == AF_INET) &&
(salen == sizeof(struct sockaddr_in)))
{
addr = (struct sockaddr_in *)sa;
port = addr->sin_port;
}
else if (salen == sizeof(struct sockaddr_in6))
else if ((sa->sa_family == AF_INET6) &&
(salen == sizeof(struct sockaddr_in6)))
{
addr6 = (struct sockaddr_in6 *)sa;
port = addr6->sin6_port;
}
else
{
callback(arg, ARES_ENOTIMP, 0, NULL, NULL);
callback(arg, ARES_EBADFAMILY, 0, NULL, NULL);
return;
}