*
* Implementation of the Transmission Control Protocol(TCP).
*
- * Version: $Id: tcp.c,v 1.216 2002/02/01 22:01:04 davem Exp $
- *
* Authors: Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Mark Evans, <evansmp@uhura.aston.ac.uk>
int sysctl_tcp_fin_timeout __read_mostly = TCP_FIN_TIMEOUT;
-DEFINE_SNMP_STAT(struct tcp_mib, tcp_statistics) __read_mostly;
-
atomic_t tcp_orphan_count = ATOMIC_INIT(0);
EXPORT_SYMBOL_GPL(tcp_orphan_count);
EXPORT_SYMBOL(tcp_memory_pressure);
-void tcp_enter_memory_pressure(void)
+void tcp_enter_memory_pressure(struct sock *sk)
{
if (!tcp_memory_pressure) {
- NET_INC_STATS(LINUX_MIB_TCPMEMORYPRESSURES);
+ NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMEMORYPRESSURES);
tcp_memory_pressure = 1;
}
}
return inet_csk_listen_poll(sk);
/* Socket is not locked. We are protected from async events
- by poll logic and correct handling of state changes
- made by another threads is impossible in any case.
+ * by poll logic and correct handling of state changes
+ * made by other threads is impossible in any case.
*/
mask = 0;
* in state CLOSE_WAIT. One solution is evident --- to set POLLHUP
* if and only if shutdown has been made in both directions.
* Actually, it is interesting to look how Solaris and DUX
- * solve this dilemma. I would prefer, if PULLHUP were maskable,
+ * solve this dilemma. I would prefer, if POLLHUP were maskable,
* then we could set it on SND_SHUTDOWN. BTW examples given
* in Stevens' books assume exactly this behaviour, it explains
- * why PULLHUP is incompatible with POLLOUT. --ANK
+ * why POLLHUP is incompatible with POLLOUT. --ANK
*
* NOTE. Check for TCP_CLOSE is added. The goal is to prevent
* blocking on fresh not-connected or disconnected socket. --ANK
}
__kfree_skb(skb);
} else {
- sk->sk_prot->enter_memory_pressure();
+ sk->sk_prot->enter_memory_pressure(sk);
sk_stream_moderate_sndbuf(sk);
}
return NULL;
#if TCP_DEBUG
struct sk_buff *skb = skb_peek(&sk->sk_receive_queue);
- BUG_TRAP(!skb || before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq));
+ WARN_ON(skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq));
#endif
if (inet_csk_ack_scheduled(sk)) {
struct sk_buff *skb;
struct tcp_sock *tp = tcp_sk(sk);
- NET_INC_STATS_USER(LINUX_MIB_TCPPREQUEUED);
+ NET_INC_STATS_USER(sock_net(sk), LINUX_MIB_TCPPREQUEUED);
/* RX process wants to run with disabled BHs, though it is not
* necessary */
goto found_ok_skb;
if (tcp_hdr(skb)->fin)
goto found_fin_ok;
- BUG_TRAP(flags & MSG_PEEK);
+ WARN_ON(!(flags & MSG_PEEK));
skb = skb->next;
} while (skb != (struct sk_buff *)&sk->sk_receive_queue);
tp->ucopy.len = len;
- BUG_TRAP(tp->copied_seq == tp->rcv_nxt ||
- (flags & (MSG_PEEK | MSG_TRUNC)));
+ WARN_ON(tp->copied_seq != tp->rcv_nxt &&
+ !(flags & (MSG_PEEK | MSG_TRUNC)));
/* Ugly... If prequeue is not empty, we have to
* process it before releasing socket, otherwise
/* __ Restore normal policy in scheduler __ */
if ((chunk = len - tp->ucopy.len) != 0) {
- NET_ADD_STATS_USER(LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG, chunk);
+ NET_ADD_STATS_USER(sock_net(sk), LINUX_MIB_TCPDIRECTCOPYFROMBACKLOG, chunk);
len -= chunk;
copied += chunk;
}
tcp_prequeue_process(sk);
if ((chunk = len - tp->ucopy.len) != 0) {
- NET_ADD_STATS_USER(LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
+ NET_ADD_STATS_USER(sock_net(sk), LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
len -= chunk;
copied += chunk;
}
tcp_prequeue_process(sk);
if (copied > 0 && (chunk = len - tp->ucopy.len) != 0) {
- NET_ADD_STATS_USER(LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
+ NET_ADD_STATS_USER(sock_net(sk), LINUX_MIB_TCPDIRECTCOPYFROMPREQUEUE, chunk);
len -= chunk;
copied += chunk;
}
switch (state) {
case TCP_ESTABLISHED:
if (oldstate != TCP_ESTABLISHED)
- TCP_INC_STATS(TCP_MIB_CURRESTAB);
+ TCP_INC_STATS(sock_net(sk), TCP_MIB_CURRESTAB);
break;
case TCP_CLOSE:
if (oldstate == TCP_CLOSE_WAIT || oldstate == TCP_ESTABLISHED)
- TCP_INC_STATS(TCP_MIB_ESTABRESETS);
+ TCP_INC_STATS(sock_net(sk), TCP_MIB_ESTABRESETS);
sk->sk_prot->unhash(sk);
if (inet_csk(sk)->icsk_bind_hash &&
/* fall through */
default:
if (oldstate==TCP_ESTABLISHED)
- TCP_DEC_STATS(TCP_MIB_CURRESTAB);
+ TCP_DEC_STATS(sock_net(sk), TCP_MIB_CURRESTAB);
}
/* Change state AFTER socket is unhashed to avoid closed
*/
if (data_was_unread) {
/* Unread data was tossed, zap the connection. */
- NET_INC_STATS_USER(LINUX_MIB_TCPABORTONCLOSE);
+ NET_INC_STATS_USER(sock_net(sk), LINUX_MIB_TCPABORTONCLOSE);
tcp_set_state(sk, TCP_CLOSE);
tcp_send_active_reset(sk, GFP_KERNEL);
} else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) {
/* Check zero linger _after_ checking for unread data. */
sk->sk_prot->disconnect(sk, 0);
- NET_INC_STATS_USER(LINUX_MIB_TCPABORTONDATA);
+ NET_INC_STATS_USER(sock_net(sk), LINUX_MIB_TCPABORTONDATA);
} else if (tcp_close_state(sk)) {
/* We FIN if the application ate all the data before
* zapping the connection.
*/
local_bh_disable();
bh_lock_sock(sk);
- BUG_TRAP(!sock_owned_by_user(sk));
+ WARN_ON(sock_owned_by_user(sk));
/* Have we already been destroyed by a softirq or backlog? */
if (state != TCP_CLOSE && sk->sk_state == TCP_CLOSE)
if (tp->linger2 < 0) {
tcp_set_state(sk, TCP_CLOSE);
tcp_send_active_reset(sk, GFP_ATOMIC);
- NET_INC_STATS_BH(LINUX_MIB_TCPABORTONLINGER);
+ NET_INC_STATS_BH(sock_net(sk),
+ LINUX_MIB_TCPABORTONLINGER);
} else {
const int tmo = tcp_fin_time(sk);
"sockets\n");
tcp_set_state(sk, TCP_CLOSE);
tcp_send_active_reset(sk, GFP_ATOMIC);
- NET_INC_STATS_BH(LINUX_MIB_TCPABORTONMEMORY);
+ NET_INC_STATS_BH(sock_net(sk),
+ LINUX_MIB_TCPABORTONMEMORY);
}
}
memset(&tp->rx_opt, 0, sizeof(tp->rx_opt));
__sk_dst_reset(sk);
- BUG_TRAP(!inet->num || icsk->icsk_bind_hash);
+ WARN_ON(inet->num && !icsk->icsk_bind_hash);
sk->sk_error_report(sk);
return err;
}
EXPORT_SYMBOL(__tcp_put_md5sig_pool);
+
+int tcp_md5_hash_header(struct tcp_md5sig_pool *hp,
+ struct tcphdr *th)
+{
+ struct scatterlist sg;
+ int err;
+
+ __sum16 old_checksum = th->check;
+ th->check = 0;
+ /* options aren't included in the hash */
+ sg_init_one(&sg, th, sizeof(struct tcphdr));
+ err = crypto_hash_update(&hp->md5_desc, &sg, sizeof(struct tcphdr));
+ th->check = old_checksum;
+ return err;
+}
+
+EXPORT_SYMBOL(tcp_md5_hash_header);
+
+int tcp_md5_hash_skb_data(struct tcp_md5sig_pool *hp,
+ struct sk_buff *skb, unsigned header_len)
+{
+ struct scatterlist sg;
+ const struct tcphdr *tp = tcp_hdr(skb);
+ struct hash_desc *desc = &hp->md5_desc;
+ unsigned i;
+ const unsigned head_data_len = skb_headlen(skb) > header_len ?
+ skb_headlen(skb) - header_len : 0;
+ const struct skb_shared_info *shi = skb_shinfo(skb);
+
+ sg_init_table(&sg, 1);
+
+ sg_set_buf(&sg, ((u8 *) tp) + header_len, head_data_len);
+ if (crypto_hash_update(desc, &sg, head_data_len))
+ return 1;
+
+ for (i = 0; i < shi->nr_frags; ++i) {
+ const struct skb_frag_struct *f = &shi->frags[i];
+ sg_set_page(&sg, f->page, f->size, f->page_offset);
+ if (crypto_hash_update(desc, &sg, f->size))
+ return 1;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(tcp_md5_hash_skb_data);
+
+int tcp_md5_hash_key(struct tcp_md5sig_pool *hp, struct tcp_md5sig_key *key)
+{
+ struct scatterlist sg;
+
+ sg_init_one(&sg, key->key, key->keylen);
+ return crypto_hash_update(&hp->md5_desc, &sg, key->keylen);
+}
+
+EXPORT_SYMBOL(tcp_md5_hash_key);
+
#endif
void tcp_done(struct sock *sk)
{
if(sk->sk_state == TCP_SYN_SENT || sk->sk_state == TCP_SYN_RECV)
- TCP_INC_STATS_BH(TCP_MIB_ATTEMPTFAILS);
+ TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_ATTEMPTFAILS);
tcp_set_state(sk, TCP_CLOSE);
tcp_clear_xmit_timers(sk);
EXPORT_SYMBOL(tcp_sendpage);
EXPORT_SYMBOL(tcp_setsockopt);
EXPORT_SYMBOL(tcp_shutdown);
-EXPORT_SYMBOL(tcp_statistics);
git.openpandora.org / pandora-kernel.git / blobdiff