From b903d324bee2627036d024dceed73b3c96558795 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 27 Oct 2011 00:44:35 -0400 Subject: [PATCH] ipv6: tcp: fix TCLASS value in ACK messages sent from TIME_WAIT commit 66b13d99d96a (ipv4: tcp: fix TOS value in ACK messages sent from TIME_WAIT) fixed IPv4 only. This part is for the IPv6 side, adding a tclass param to ip6_xmit() We alias tw_tclass and tw_tos, if socket family is INET6. [ if sockets is ipv4-mapped, only IP_TOS socket option is used to fill TOS field, TCLASS is not taken into account ] Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/net/inet_timewait_sock.h | 1 + include/net/ipv6.h | 3 ++- net/dccp/ipv6.c | 4 ++-- net/ipv4/tcp_minisocks.c | 1 + net/ipv6/inet6_connection_sock.c | 2 +- net/ipv6/ip6_output.c | 7 ++----- net/ipv6/tcp_ipv6.c | 17 +++++++++-------- net/sctp/ipv6.c | 2 +- 8 files changed, 19 insertions(+), 18 deletions(-) diff --git a/include/net/inet_timewait_sock.h b/include/net/inet_timewait_sock.h index 180231c5bbb..f91a1fb5da7 100644 --- a/include/net/inet_timewait_sock.h +++ b/include/net/inet_timewait_sock.h @@ -134,6 +134,7 @@ struct inet_timewait_sock { struct inet_bind_bucket *tw_tb; struct hlist_node tw_death_node; }; +#define tw_tclass tw_tos static inline void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw, struct hlist_nulls_head *list) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 3b5ac1fbff3..a366a8a1fe2 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -486,7 +486,8 @@ extern int ip6_rcv_finish(struct sk_buff *skb); extern int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, - struct ipv6_txoptions *opt); + struct ipv6_txoptions *opt, + int tclass); extern int ip6_nd_hdr(struct sock *sk, struct sk_buff *skb, diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index b74f76117dc..17ee85ce148 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -271,7 +271,7 @@ static int dccp_v6_send_response(struct sock *sk, struct request_sock *req, &ireq6->loc_addr, &ireq6->rmt_addr); ipv6_addr_copy(&fl6.daddr, &ireq6->rmt_addr); - err = ip6_xmit(sk, skb, &fl6, opt); + err = ip6_xmit(sk, skb, &fl6, opt, np->tclass); err = net_xmit_eval(err); } @@ -326,7 +326,7 @@ static void dccp_v6_ctl_send_reset(struct sock *sk, struct sk_buff *rxskb) dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false); if (!IS_ERR(dst)) { skb_dst_set(skb, dst); - ip6_xmit(ctl_sk, skb, &fl6, NULL); + ip6_xmit(ctl_sk, skb, &fl6, NULL, 0); DCCP_INC_STATS_BH(DCCP_MIB_OUTSEGS); DCCP_INC_STATS_BH(DCCP_MIB_OUTRSTS); return; diff --git a/net/ipv4/tcp_minisocks.c b/net/ipv4/tcp_minisocks.c index 85a2fbebd7e..66363b689ad 100644 --- a/net/ipv4/tcp_minisocks.c +++ b/net/ipv4/tcp_minisocks.c @@ -345,6 +345,7 @@ void tcp_time_wait(struct sock *sk, int state, int timeo) tw6 = inet6_twsk((struct sock *)tw); ipv6_addr_copy(&tw6->tw_v6_daddr, &np->daddr); ipv6_addr_copy(&tw6->tw_v6_rcv_saddr, &np->rcv_saddr); + tw->tw_tclass = np->tclass; tw->tw_ipv6only = np->ipv6only; } #endif diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c index 2916200f90c..fee46d5a2f1 100644 --- a/net/ipv6/inet6_connection_sock.c +++ b/net/ipv6/inet6_connection_sock.c @@ -248,7 +248,7 @@ int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl_unused) /* Restore final destination back after routing done */ ipv6_addr_copy(&fl6.daddr, &np->daddr); - res = ip6_xmit(sk, skb, &fl6, np->opt); + res = ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); rcu_read_unlock(); return res; } diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 1c9bf8b5c30..ff300474bee 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -180,7 +180,7 @@ int ip6_output(struct sk_buff *skb) */ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, - struct ipv6_txoptions *opt) + struct ipv6_txoptions *opt, int tclass) { struct net *net = sock_net(sk); struct ipv6_pinfo *np = inet6_sk(sk); @@ -190,7 +190,6 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, u8 proto = fl6->flowi6_proto; int seg_len = skb->len; int hlimit = -1; - int tclass = 0; u32 mtu; if (opt) { @@ -228,10 +227,8 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6, /* * Fill in the IPv6 header */ - if (np) { - tclass = np->tclass; + if (np) hlimit = np->hop_limit; - } if (hlimit < 0) hlimit = ip6_dst_hoplimit(dst); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index c8683fcc487..10b2b3165a1 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -513,7 +513,7 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req, __tcp_v6_send_check(skb, &treq->loc_addr, &treq->rmt_addr); ipv6_addr_copy(&fl6.daddr, &treq->rmt_addr); - err = ip6_xmit(sk, skb, &fl6, opt); + err = ip6_xmit(sk, skb, &fl6, opt, np->tclass); err = net_xmit_eval(err); } @@ -979,7 +979,7 @@ static int tcp6_gro_complete(struct sk_buff *skb) } static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, - u32 ts, struct tcp_md5sig_key *key, int rst) + u32 ts, struct tcp_md5sig_key *key, int rst, u8 tclass) { const struct tcphdr *th = tcp_hdr(skb); struct tcphdr *t1; @@ -1060,7 +1060,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win, dst = ip6_dst_lookup_flow(ctl_sk, &fl6, NULL, false); if (!IS_ERR(dst)) { skb_dst_set(buff, dst); - ip6_xmit(ctl_sk, buff, &fl6, NULL); + ip6_xmit(ctl_sk, buff, &fl6, NULL, tclass); TCP_INC_STATS_BH(net, TCP_MIB_OUTSEGS); if (rst) TCP_INC_STATS_BH(net, TCP_MIB_OUTRSTS); @@ -1093,13 +1093,13 @@ 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, key, 1); + tcp_v6_send_response(skb, seq, ack_seq, 0, 0, key, 1, 0); } static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32 ts, - struct tcp_md5sig_key *key) + struct tcp_md5sig_key *key, u8 tclass) { - tcp_v6_send_response(skb, seq, ack, win, ts, key, 0); + tcp_v6_send_response(skb, seq, ack, win, ts, key, 0, tclass); } static void tcp_v6_timewait_ack(struct sock *sk, struct sk_buff *skb) @@ -1109,7 +1109,8 @@ 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, - tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw)); + tcptw->tw_ts_recent, tcp_twsk_md5_key(tcptw), + tw->tw_tclass); inet_twsk_put(tw); } @@ -1118,7 +1119,7 @@ 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, req->ts_recent, - tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr)); + tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr), 0); } diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index aabaee41dd3..810427833bc 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -243,7 +243,7 @@ static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) if (!(transport->param_flags & SPP_PMTUD_ENABLE)) skb->local_df = 1; - return ip6_xmit(sk, skb, &fl6, np->opt); + return ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); } /* Returns the dst cache entry for the given source and destination ip -- 2.11.4.GIT