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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.c46
1 files changed, 25 insertions, 21 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 889079b2ea85..e289830ed6e3 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -39,7 +39,7 @@
#include <linux/ipsec.h>
#include <linux/times.h>
#include <linux/slab.h>
-
+#include <linux/uaccess.h>
#include <linux/ipv6.h>
#include <linux/icmpv6.h>
#include <linux/random.h>
@@ -65,8 +65,6 @@
#include <net/tcp_memcontrol.h>
#include <net/busy_poll.h>
-#include <asm/uaccess.h>
-
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
@@ -501,8 +499,10 @@ static int tcp_v6_rtx_synack(struct sock *sk, struct request_sock *req)
int res;
res = tcp_v6_send_synack(sk, NULL, &fl6, req, 0);
- if (!res)
+ if (!res) {
TCP_INC_STATS_BH(sock_net(sk), TCP_MIB_RETRANSSEGS);
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPSYNRETRANS);
+ }
return res;
}
@@ -530,8 +530,8 @@ static struct tcp_md5sig_key *tcp_v6_reqsk_md5_lookup(struct sock *sk,
return tcp_v6_md5_do_lookup(sk, &inet_rsk(req)->ir_v6_rmt_addr);
}
-static int tcp_v6_parse_md5_keys (struct sock *sk, char __user *optval,
- int optlen)
+static int tcp_v6_parse_md5_keys(struct sock *sk, char __user *optval,
+ int optlen)
{
struct tcp_md5sig cmd;
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&cmd.tcpm_addr;
@@ -715,7 +715,7 @@ struct request_sock_ops tcp6_request_sock_ops __read_mostly = {
.send_ack = tcp_v6_reqsk_send_ack,
.destructor = tcp_v6_reqsk_destructor,
.send_reset = tcp_v6_send_reset,
- .syn_ack_timeout = tcp_syn_ack_timeout,
+ .syn_ack_timeout = tcp_syn_ack_timeout,
};
#ifdef CONFIG_TCP_MD5SIG
@@ -726,7 +726,7 @@ static const struct tcp_request_sock_ops tcp_request_sock_ipv6_ops = {
#endif
static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
- u32 tsval, u32 tsecr,
+ u32 tsval, u32 tsecr, int oif,
struct tcp_md5sig_key *key, int rst, u8 tclass,
u32 label)
{
@@ -798,8 +798,10 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
__tcp_v6_send_check(buff, &fl6.saddr, &fl6.daddr);
fl6.flowi6_proto = IPPROTO_TCP;
- if (ipv6_addr_type(&fl6.daddr) & IPV6_ADDR_LINKLOCAL)
+ if (rt6_need_strict(&fl6.daddr) && !oif)
fl6.flowi6_oif = inet6_iif(skb);
+ else
+ fl6.flowi6_oif = oif;
fl6.fl6_dport = t1->dest;
fl6.fl6_sport = t1->source;
security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
@@ -833,6 +835,7 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
int genhash;
struct sock *sk1 = NULL;
#endif
+ int oif;
if (th->rst)
return;
@@ -876,7 +879,8 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
ack_seq = ntohl(th->seq) + th->syn + th->fin + skb->len -
(th->doff << 2);
- tcp_v6_send_response(skb, seq, ack_seq, 0, 0, 0, key, 1, 0, 0);
+ oif = sk ? sk->sk_bound_dev_if : 0;
+ tcp_v6_send_response(skb, seq, ack_seq, 0, 0, 0, oif, key, 1, 0, 0);
#ifdef CONFIG_TCP_MD5SIG
release_sk1:
@@ -888,11 +892,11 @@ release_sk1:
}
static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack,
- u32 win, u32 tsval, u32 tsecr,
+ u32 win, u32 tsval, u32 tsecr, int oif,
struct tcp_md5sig_key *key, u8 tclass,
u32 label)
{
- tcp_v6_send_response(skb, seq, ack, win, tsval, tsecr, key, 0, tclass,
+ tcp_v6_send_response(skb, seq, ack, win, tsval, tsecr, oif, key, 0, tclass,
label);
}
@@ -904,7 +908,7 @@ static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb)
tcp_v6_send_ack(skb, tcptw->tw_snd_nxt, tcptw->tw_rcv_nxt,
tcptw->tw_rcv_wnd >> tw->tw_rcv_wscale,
tcp_time_stamp + tcptw->tw_ts_offset,
- tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw),
+ tcptw->tw_ts_recent, tw->tw_bound_dev_if, tcp_twsk_md5_key(tcptw),
tw->tw_tclass, (tw->tw_flowlabel << 12));
inet_twsk_put(tw);
@@ -914,7 +918,7 @@ static void tcp_v6_reqsk_send_ack(struct sock *sk, struct sk_buff *skb,
struct request_sock *req)
{
tcp_v6_send_ack(skb, tcp_rsk(req)->snt_isn + 1, tcp_rsk(req)->rcv_isn + 1,
- req->rcv_wnd, tcp_time_stamp, req->ts_recent,
+ req->rcv_wnd, tcp_time_stamp, req->ts_recent, sk->sk_bound_dev_if,
tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr),
0, 0);
}
@@ -1259,7 +1263,8 @@ static struct sock *tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
#ifdef CONFIG_TCP_MD5SIG
/* Copy over the MD5 key from the original socket */
- if ((key = tcp_v6_md5_do_lookup(sk, &newsk->sk_v6_daddr)) != NULL) {
+ key = tcp_v6_md5_do_lookup(sk, &newsk->sk_v6_daddr);
+ if (key != NULL) {
/* We're using one, so create a matching key
* on the newsk structure. If we fail to get
* memory, then we end up not copying the key
@@ -1303,9 +1308,8 @@ static __sum16 tcp_v6_checksum_init(struct sk_buff *skb)
&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr, 0));
- if (skb->len <= 76) {
+ if (skb->len <= 76)
return __skb_checksum_complete(skb);
- }
return 0;
}
@@ -1335,7 +1339,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
return tcp_v4_do_rcv(sk, skb);
#ifdef CONFIG_TCP_MD5SIG
- if (tcp_v6_inbound_md5_hash (sk, skb))
+ if (tcp_v6_inbound_md5_hash(sk, skb))
goto discard;
#endif
@@ -1602,7 +1606,8 @@ do_time_wait:
break;
case TCP_TW_RST:
goto no_tcp_socket;
- case TCP_TW_SUCCESS:;
+ case TCP_TW_SUCCESS:
+ ;
}
goto discard_it;
}
@@ -1647,7 +1652,7 @@ static void tcp_v6_early_demux(struct sk_buff *skb)
static struct timewait_sock_ops tcp6_timewait_sock_ops = {
.twsk_obj_size = sizeof(struct tcp6_timewait_sock),
.twsk_unique = tcp_twsk_unique,
- .twsk_destructor= tcp_twsk_destructor,
+ .twsk_destructor = tcp_twsk_destructor,
};
static const struct inet_connection_sock_af_ops ipv6_specific = {
@@ -1681,7 +1686,6 @@ static const struct tcp_sock_af_ops tcp_sock_ipv6_specific = {
/*
* TCP over IPv4 via INET6 API
*/
-
static const struct inet_connection_sock_af_ops ipv6_mapped = {
.queue_xmit = ip_queue_xmit,
.send_check = tcp_v4_send_check,
generated by cgit v1.2.3-70-g09d2 (git 2.51.1) at 2025-11-04 09:10:41 +0000