diff options
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
| -rw-r--r-- | net/ipv4/tcp_ipv4.c | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 6d88219c5e22..770fd759a6e9 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1846,6 +1846,49 @@ void tcp_v4_destroy_sock(struct sock *sk) EXPORT_SYMBOL(tcp_v4_destroy_sock); +/* + * tcp_v4_nuke_addr - destroy all sockets on the given local address + */ +void tcp_v4_nuke_addr(__u32 saddr) +{ + unsigned int bucket; + + for (bucket = 0; bucket < tcp_hashinfo.ehash_size; bucket++) { + struct hlist_nulls_node *node; + struct sock *sk; + spinlock_t *lock = inet_ehash_lockp(&tcp_hashinfo, bucket); + +restart: + spin_lock_bh(lock); + sk_nulls_for_each(sk, node, &tcp_hashinfo.ehash[bucket].chain) { + struct inet_sock *inet = inet_sk(sk); + + if (inet->rcv_saddr != saddr) + continue; + if (sysctl_ip_dynaddr && sk->sk_state == TCP_SYN_SENT) + continue; + if (sock_flag(sk, SOCK_DEAD)) + continue; + + sock_hold(sk); + spin_unlock_bh(lock); + + local_bh_disable(); + bh_lock_sock(sk); + sk->sk_err = ETIMEDOUT; + sk->sk_error_report(sk); + + tcp_done(sk); + bh_unlock_sock(sk); + local_bh_enable(); + sock_put(sk); + + goto restart; + } + spin_unlock_bh(lock); + } +} + #ifdef CONFIG_PROC_FS /* Proc filesystem TCP sock list dumping. */ @@ -2455,4 +2498,3 @@ EXPORT_SYMBOL(tcp_proc_register); EXPORT_SYMBOL(tcp_proc_unregister); #endif EXPORT_SYMBOL(sysctl_tcp_low_latency); - |