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path: root/net/ipv6/tcp_ipv6.c
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Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
-rw-r--r--net/ipv6/tcp_ipv6.c91
1 files changed, 25 insertions, 66 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 86cfe6005f40..9df64a50b075 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -476,7 +476,8 @@ out:
static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
- struct request_values *rvp)
+ struct request_values *rvp,
+ u16 queue_mapping)
{
struct inet6_request_sock *treq = inet6_rsk(req);
struct ipv6_pinfo *np = inet6_sk(sk);
@@ -513,6 +514,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
__tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr);
fl6.daddr = treq->rmt_addr;
+ skb_set_queue_mapping(skb, queue_mapping);
err = ip6_xmit(sk, skb, &fl6, opt, np->tclass);
err = net_xmit_eval(err);
}
@@ -528,7 +530,7 @@ static int tcp_v6_rtx_synack(struct sock *sk, struct request_sock *req,
struct request_values *rvp)
{
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
- return tcp_v6_send_synack(sk, req, rvp);
+ return tcp_v6_send_synack(sk, req, rvp, 0);
}
static void tcp_v6_reqsk_destructor(struct request_sock *req)
@@ -723,12 +725,10 @@ static int tcp_v6_inbound_md5_hash(struct sock *sk, const struct sk_buff *skb)
NULL, NULL, skb);
if (genhash || memcmp(hash_location, newhash, 16) != 0) {
- if (net_ratelimit()) {
- printk(KERN_INFO "MD5 Hash %s for [%pI6c]:%u->[%pI6c]:%u\n",
- genhash ? "failed" : "mismatch",
- &ip6h->saddr, ntohs(th->source),
- &ip6h->daddr, ntohs(th->dest));
- }
+ net_info_ratelimited("MD5 Hash %s for [%pI6c]:%u->[%pI6c]:%u\n",
+ genhash ? "failed" : "mismatch",
+ &ip6h->saddr, ntohs(th->source),
+ &ip6h->daddr, ntohs(th->dest));
return 1;
}
return 0;
@@ -1057,7 +1057,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
struct tcp_sock *tp = tcp_sk(sk);
__u32 isn = TCP_SKB_CB(skb)->when;
struct dst_entry *dst = NULL;
- int want_cookie = 0;
+ bool want_cookie = false;
if (skb->protocol == htons(ETH_P_IP))
return tcp_v4_conn_request(sk, skb);
@@ -1118,7 +1118,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
while (l-- > 0)
*c++ ^= *hash_location++;
- want_cookie = 0; /* not our kind of cookie */
+ want_cookie = false; /* not our kind of cookie */
tmp_ext.cookie_out_never = 0; /* false */
tmp_ext.cookie_plus = tmp_opt.cookie_plus;
} else if (!tp->rx_opt.cookie_in_always) {
@@ -1140,7 +1140,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
treq->rmt_addr = ipv6_hdr(skb)->saddr;
treq->loc_addr = ipv6_hdr(skb)->daddr;
if (!want_cookie || tmp_opt.tstamp_ok)
- TCP_ECN_create_request(req, tcp_hdr(skb));
+ TCP_ECN_create_request(req, skb);
treq->iif = sk->sk_bound_dev_if;
@@ -1212,10 +1212,12 @@ have_isn:
tcp_rsk(req)->snt_isn = isn;
tcp_rsk(req)->snt_synack = tcp_time_stamp;
- security_inet_conn_request(sk, skb, req);
+ if (security_inet_conn_request(sk, skb, req))
+ goto drop_and_release;
if (tcp_v6_send_synack(sk, req,
- (struct request_values *)&tmp_ext) ||
+ (struct request_values *)&tmp_ext,
+ skb_get_queue_mapping(skb)) ||
want_cookie)
goto drop_and_free;
@@ -1353,7 +1355,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
newnp->pktoptions = NULL;
if (treq->pktopts != NULL) {
newnp->pktoptions = skb_clone(treq->pktopts, GFP_ATOMIC);
- kfree_skb(treq->pktopts);
+ consume_skb(treq->pktopts);
treq->pktopts = NULL;
if (newnp->pktoptions)
skb_set_owner_r(newnp->pktoptions, newsk);
@@ -1383,6 +1385,10 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
tcp_mtup_init(newsk);
tcp_sync_mss(newsk, dst_mtu(dst));
newtp->advmss = dst_metric_advmss(dst);
+ if (tcp_sk(sk)->rx_opt.user_mss &&
+ tcp_sk(sk)->rx_opt.user_mss < newtp->advmss)
+ newtp->advmss = tcp_sk(sk)->rx_opt.user_mss;
+
tcp_initialize_rcv_mss(newsk);
if (tcp_rsk(req)->snt_synack)
tcp_valid_rtt_meas(newsk,
@@ -1654,7 +1660,8 @@ process:
if (!tcp_prequeue(sk, skb))
ret = tcp_v6_do_rcv(sk, skb);
}
- } else if (unlikely(sk_add_backlog(sk, skb))) {
+ } else if (unlikely(sk_add_backlog(sk, skb,
+ sk->sk_rcvbuf + sk->sk_sndbuf))) {
bh_unlock_sock(sk);
NET_INC_STATS_BH(net, LINUX_MIB_TCPBACKLOGDROP);
goto discard_and_relse;
@@ -1773,6 +1780,7 @@ static const struct inet_connection_sock_af_ops ipv6_specific = {
.syn_recv_sock = tcp_v6_syn_recv_sock,
.get_peer = tcp_v6_get_peer,
.net_header_len = sizeof(struct ipv6hdr),
+ .net_frag_header_len = sizeof(struct frag_hdr),
.setsockopt = ipv6_setsockopt,
.getsockopt = ipv6_getsockopt,
.addr2sockaddr = inet6_csk_addr2sockaddr,
@@ -1829,64 +1837,15 @@ static const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific = {
static int tcp_v6_init_sock(struct sock *sk)
{
struct inet_connection_sock *icsk = inet_csk(sk);
- struct tcp_sock *tp = tcp_sk(sk);
-
- skb_queue_head_init(&tp->out_of_order_queue);
- tcp_init_xmit_timers(sk);
- tcp_prequeue_init(tp);
-
- icsk->icsk_rto = TCP_TIMEOUT_INIT;
- tp->mdev = TCP_TIMEOUT_INIT;
-
- /* So many TCP implementations out there (incorrectly) count the
- * initial SYN frame in their delayed-ACK and congestion control
- * algorithms that we must have the following bandaid to talk
- * efficiently to them. -DaveM
- */
- tp->snd_cwnd = 2;
- /* See draft-stevens-tcpca-spec-01 for discussion of the
- * initialization of these values.
- */
- tp->snd_ssthresh = TCP_INFINITE_SSTHRESH;
- tp->snd_cwnd_clamp = ~0;
- tp->mss_cache = TCP_MSS_DEFAULT;
-
- tp->reordering = sysctl_tcp_reordering;
-
- sk->sk_state = TCP_CLOSE;
+ tcp_init_sock(sk);
icsk->icsk_af_ops = &ipv6_specific;
- icsk->icsk_ca_ops = &tcp_init_congestion_ops;
- icsk->icsk_sync_mss = tcp_sync_mss;
- sk->sk_write_space = sk_stream_write_space;
- sock_set_flag(sk, SOCK_USE_WRITE_QUEUE);
#ifdef CONFIG_TCP_MD5SIG
- tp->af_specific = &tcp_sock_ipv6_specific;
+ tcp_sk(sk)->af_specific = &tcp_sock_ipv6_specific;
#endif
- /* TCP Cookie Transactions */
- if (sysctl_tcp_cookie_size > 0) {
- /* Default, cookies without s_data_payload. */
- tp->cookie_values =
- kzalloc(sizeof(*tp->cookie_values),
- sk->sk_allocation);
- if (tp->cookie_values != NULL)
- kref_init(&tp->cookie_values->kref);
- }
- /* Presumed zeroed, in order of appearance:
- * cookie_in_always, cookie_out_never,
- * s_data_constant, s_data_in, s_data_out
- */
- sk->sk_sndbuf = sysctl_tcp_wmem[1];
- sk->sk_rcvbuf = sysctl_tcp_rmem[1];
-
- local_bh_disable();
- sock_update_memcg(sk);
- sk_sockets_allocated_inc(sk);
- local_bh_enable();
-
return 0;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.