From b9031d9d87b24e24cd32ea15b5f4220a1e8da909 Mon Sep 17 00:00:00 2001
From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Wed, 4 Jun 2008 12:40:15 -0700
Subject: [PATCH] sctp: Fix ECN markings for IPv6
Commit e9df2e8fd8fbc95c57dbd1d33dada66c4627b44c ("[IPV6]: Use
appropriate sock tclass setting for routing lookup.") also changed the
way that ECN capable transports mark this capability in IPv6. As a
result, SCTP was not marking ECN capablity because the traffic class
was never set. This patch brings back the markings for IPv6 traffic.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/net/sctp/structs.h | 1 +
net/sctp/ipv6.c | 6 ++++++
net/sctp/output.c | 2 +-
net/sctp/protocol.c | 6 ++++++
4 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 714dc43c0345..7f25195f9855 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -588,6 +588,7 @@ struct sctp_af {
int (*is_ce) (const struct sk_buff *sk);
void (*seq_dump_addr)(struct seq_file *seq,
union sctp_addr *addr);
+ void (*ecn_capable)(struct sock *sk);
__u16 net_header_len;
int sockaddr_len;
sa_family_t sa_family;
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index e4aac3266fcd..a2f4d4d51593 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -727,6 +727,11 @@ static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
seq_printf(seq, NIP6_FMT " ", NIP6(addr->v6.sin6_addr));
}
+static void sctp_v6_ecn_capable(struct sock *sk)
+{
+ inet6_sk(sk)->tclass |= INET_ECN_ECT_0;
+}
+
/* Initialize a PF_INET6 socket msg_name. */
static void sctp_inet6_msgname(char *msgname, int *addr_len)
{
@@ -997,6 +1002,7 @@ static struct sctp_af sctp_af_inet6 = {
.skb_iif = sctp_v6_skb_iif,
.is_ce = sctp_v6_is_ce,
.seq_dump_addr = sctp_v6_seq_dump_addr,
+ .ecn_capable = sctp_v6_ecn_capable,
.net_header_len = sizeof(struct ipv6hdr),
.sockaddr_len = sizeof(struct sockaddr_in6),
#ifdef CONFIG_COMPAT
diff --git a/net/sctp/output.c b/net/sctp/output.c
index cf4f9fb6819d..6d45bae93b46 100644
--- a/net/sctp/output.c
+++ b/net/sctp/output.c
@@ -548,7 +548,7 @@ int sctp_packet_transmit(struct sctp_packet *packet)
* Note: The works for IPv6 layer checks this bit too later
* in transmission. See IP6_ECN_flow_xmit().
*/
- INET_ECN_xmit(nskb->sk);
+ (*tp->af_specific->ecn_capable)(nskb->sk);
/* Set up the IP options. */
/* BUG: not implemented
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 56bdaf7fc425..b435a193c5df 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -617,6 +617,11 @@ static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
}
+static void sctp_v4_ecn_capable(struct sock *sk)
+{
+ INET_ECN_xmit(sk);
+}
+
/* Event handler for inet address addition/deletion events.
* The sctp_local_addr_list needs to be protocted by a spin lock since
* multiple notifiers (say IPv4 and IPv6) may be running at the same
@@ -935,6 +940,7 @@ static struct sctp_af sctp_af_inet = {
.skb_iif = sctp_v4_skb_iif,
.is_ce = sctp_v4_is_ce,
.seq_dump_addr = sctp_v4_seq_dump_addr,
+ .ecn_capable = sctp_v4_ecn_capable,
.net_header_len = sizeof(struct iphdr),
.sockaddr_len = sizeof(struct sockaddr_in),
#ifdef CONFIG_COMPAT
--
2.20.1