diff options
Diffstat (limited to 'tcp.c')
| -rw-r--r-- | tcp.c | 34 |
1 files changed, 29 insertions, 5 deletions
@@ -1792,7 +1792,7 @@ int tcp_conn_pool_sock(int pool[]) * * Return: socket number on success, negative code if socket creation failed */ -int tcp_conn_new_sock(const struct ctx *c, sa_family_t af) +static int tcp_conn_new_sock(const struct ctx *c, sa_family_t af) { int s; @@ -1812,6 +1812,32 @@ int tcp_conn_new_sock(const struct ctx *c, sa_family_t af) } /** + * tcp_conn_sock() - Obtain a connectable socket in the host/init namespace + * @c: Execution context + * @af: Address family (AF_INET or AF_INET6) + * + * Return: Socket fd on success, -errno on failure + */ +int tcp_conn_sock(const struct ctx *c, sa_family_t af) +{ + int *pool = af == AF_INET6 ? init_sock_pool6 : init_sock_pool4; + int s; + + if ((s = tcp_conn_pool_sock(pool)) >= 0) + return s; + + /* If the pool is empty we just open a new one without refilling the + * pool to keep latency down. + */ + if ((s = tcp_conn_new_sock(c, af)) >= 0) + return s; + + err("TCP: Unable to open socket for new connection: %s", + strerror(-s)); + return -1; +} + +/** * tcp_conn_tap_mss() - Get MSS value advertised by tap/guest * @conn: Connection pointer * @opts: Pointer to start of TCP options @@ -1909,7 +1935,6 @@ static void tcp_conn_from_tap(struct ctx *c, sa_family_t af, const struct tcphdr *th, const char *opts, size_t optlen, const struct timespec *now) { - int *pool = af == AF_INET6 ? init_sock_pool6 : init_sock_pool4; struct sockaddr_in addr4 = { .sin_family = AF_INET, .sin_port = th->dest, @@ -1931,9 +1956,8 @@ static void tcp_conn_from_tap(struct ctx *c, sa_family_t af, if (!(flow = flow_alloc())) return; - if ((s = tcp_conn_pool_sock(pool)) < 0) - if ((s = tcp_conn_new_sock(c, af)) < 0) - goto cancel; + if ((s = tcp_conn_sock(c, af)) < 0) + goto cancel; if (!c->no_map_gw) { if (af == AF_INET && IN4_ARE_ADDR_EQUAL(daddr, &c->ip4.gw)) |