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daemon.c: avoid accessing ss_family member of struct sockaddr_storage

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When NO_SOCKADDR_STORAGE is set for a platform, either sockaddr_in or
sockaddr_in6 is used intead.  Neither of which has an ss_family member.
They have an sin_family and sin6_family member respectively.  Since the
addrcmp() function accesses the ss_family member of a sockaddr_storage
struct, compilation fails on platforms which define NO_SOCKADDR_STORAGE.

Since any sockaddr_* structure can be cast to a struct sockaddr and
have its sa_family member read, do so here to workaround this issue.

Thanks to Martin Storsjö for pointing out the fix, and Gary Vaughan
for drawing attention to the issue.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Casey 2010-03-15 17:10:06 -05:00 committed by Junio C Hamano
parent 8fcaca3ff2
commit 3aff874af2
1 changed files with 7 additions and 4 deletions
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11
daemon.c
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@ -590,14 +590,17 @@ static int execute(struct sockaddr *addr)
static int addrcmp(const struct sockaddr_storage *s1,
const struct sockaddr_storage *s2)
{
if (s1->ss_family != s2->ss_family)
return s1->ss_family - s2->ss_family;
if (s1->ss_family == AF_INET)
const struct sockaddr *sa1 = (const struct sockaddr*) s1;
const struct sockaddr *sa2 = (const struct sockaddr*) s2;
if (sa1->sa_family != sa2->sa_family)
return sa1->sa_family - sa2->sa_family;
if (sa1->sa_family == AF_INET)
return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
&((struct sockaddr_in *)s2)->sin_addr,
sizeof(struct in_addr));
#ifndef NO_IPV6
if (s1->ss_family == AF_INET6)
if (sa1->sa_family == AF_INET6)
return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
&((struct sockaddr_in6 *)s2)->sin6_addr,
sizeof(struct in6_addr));