ws2_32: Consider socket with zero ifindex unbound.

Real interface index can't be zero. getsockopt(..., IP_UNICAST_IF, ...) may return success and zero interface index if IP_UNICAST_IF was never set. Avoids error output which doesn't inidcate a real error condition for such case. Signed-off-by: Paul Gofman <pgofman@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

ws2_32: Consider socket with zero ifindex unbound.
d888f3ba · Paul Gofman · Alexandre Julliard · a2fe0d57 · d888f3ba
Commit d888f3ba authored Jul 03, 2020 by Paul Gofman Committed by Alexandre Julliard Jul 03, 2020
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socket.c dlls/ws2_32/socket.c +1 -1

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--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -3788,7 +3788,7 @@ static void interface_bind_check(int fd, struct sockaddr_in *addr)
    ret = getsockopt(fd, IPPROTO_IP, IP_UNICAST_IF, &ifindex, &len);
    if (!ret) ifindex = ntohl(ifindex);
 #endif
-    if (!ret)
+    if (!ret && ifindex)
    {
        EnterCriticalSection(&cs_if_addr_cache);
        if (ifindex < if_addr_cache_size)