From 6eda08fbff4f911c5884876a33708cf17fa28a8b Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Thu, 29 Dec 2016 11:21:37 +0100 Subject: [PATCH] core: fix sockaddr length calculation for sockaddr_pretty() (#4966) Let's simply store the socket address length in the SocketPeer object so that we can use it when invoking sockaddr_pretty(): This fixes the issue described in #4943, but avoids calling getpeername() twice. (cherry picked from commit 41733ae1e0035c538505bc5be1ca5d67a80b4a82) --- src/core/socket.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/core/socket.c b/src/core/socket.c index 0b1c4acfec..fe2020008f 100644 --- a/src/core/socket.c +++ b/src/core/socket.c @@ -64,6 +64,7 @@ struct SocketPeer { Socket *socket; union sockaddr_union peer; + socklen_t peer_salen; }; static const UnitActiveState state_translation_table[_SOCKET_STATE_MAX] = { @@ -490,8 +491,10 @@ static void peer_address_hash_func(const void *p, struct siphash *state) { if (s->peer.sa.sa_family == AF_INET) siphash24_compress(&s->peer.in.sin_addr, sizeof(s->peer.in.sin_addr), state); - else + else if (s->peer.sa.sa_family == AF_INET6) siphash24_compress(&s->peer.in6.sin6_addr, sizeof(s->peer.in6.sin6_addr), state); + else + assert_not_reached("Unknown address family."); } static int peer_address_compare_func(const void *a, const void *b) { @@ -609,6 +612,7 @@ int socket_acquire_peer(Socket *s, int fd, SocketPeer **p) { return log_oom(); remote->peer = sa.peer; + remote->peer_salen = salen; r = set_put(s->peers_by_address, remote); if (r < 0) @@ -2196,7 +2200,7 @@ static void socket_enter_running(Socket *s, int cfd) { } else if (r > 0 && p->n_ref > s->max_connections_per_source) { _cleanup_free_ char *t = NULL; - sockaddr_pretty(&p->peer.sa, FAMILY_ADDRESS_SIZE(p->peer.sa.sa_family), true, false, &t); + (void) sockaddr_pretty(&p->peer.sa, p->peer_salen, true, false, &t); log_unit_warning(UNIT(s), "Too many incoming connections (%u) from source %s, dropping connection.",