From: Brandon Casey <drafnel@xxxxxxxxx>
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@xxxxxxxxxxxxxxx>
---
On 03/15/2010 04:37 PM, Martin Storsjö wrote:
> Coming to think about it, would it simplify the code even more if the
> function were to take a const struct sockaddr* as a parameter instead?
> That would, on the other hand, require more casts where it's called,
> though...
How about this.
-brandon
daemon.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/daemon.c b/daemon.c
index 3769b6f..2e6766f 100644
--- a/daemon.c
+++ b/daemon.c
@@ -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));
--
1.6.6.2
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