From 15515b73716a6ead5a5a348a7d04cc7d73c74bff Mon Sep 17 00:00:00 2001 From: Erik Faye-Lund Date: Sat, 9 Jan 2010 15:13:28 +0100 Subject: [PATCH] daemon: consider only address in kill_some_child() kill_some_child() compares the entire sockaddr_storage structure (with the pad-bits zeroed out) when trying to find out if connections originate from the same host. However, sockaddr_storage contains the port-number for the connection (which varies between connections), so the comparison always fails. Change the code so we only consider the host-address, by introducing the addrcmp()-function that inspects the address family and compare as appropriate. Signed-off-by: Erik Faye-Lund Signed-off-by: Junio C Hamano --- daemon.c | 28 ++++++++++++++++++++-------- 1 file changed, 20 insertions(+), 8 deletions(-) diff --git a/daemon.c b/daemon.c index 5783e2401..918e560b4 100644 --- a/daemon.c +++ b/daemon.c @@ -562,6 +562,24 @@ static int execute(struct sockaddr *addr) return -1; } +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) + 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) + return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr, + &((struct sockaddr_in6 *)s2)->sin6_addr, + sizeof(struct in6_addr)); +#endif + return 0; +} + static int max_connections = 32; static unsigned int live_children; @@ -576,17 +594,12 @@ static void add_child(pid_t pid, struct sockaddr *addr, int addrlen) { struct child *newborn, **cradle; - /* - * This must be xcalloc() -- we'll compare the whole sockaddr_storage - * but individual address may be shorter. - */ newborn = xcalloc(1, sizeof(*newborn)); live_children++; newborn->pid = pid; memcpy(&newborn->address, addr, addrlen); for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next) - if (!memcmp(&(*cradle)->address, &newborn->address, - sizeof(newborn->address))) + if (!addrcmp(&(*cradle)->address, &newborn->address)) break; newborn->next = *cradle; *cradle = newborn; @@ -619,8 +632,7 @@ static void kill_some_child(void) return; for (; (next = blanket->next); blanket = next) - if (!memcmp(&blanket->address, &next->address, - sizeof(next->address))) { + if (!addrcmp(&blanket->address, &next->address)) { kill(blanket->pid, SIGTERM); break; } -- 2.26.2