[PATCH net-next 06/15] sctp: create udp6 sock and set its encap_rcv
From: Xin Long <lucien.xin@gmail.com>
Date: 2020-09-29 13:50:13
Also in:
linux-sctp
Subsystem:
networking [general], sctp protocol, the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Marcelo Ricardo Leitner, Xin Long, Linus Torvalds
This patch is to add the udp6 sock part in sctp_udp_sock_start/stop().
udp_conf.use_udp6_rx_checksums is set to true, as:
"The SCTP checksum MUST be computed for IPv4 and IPv6, and the UDP
checksum SHOULD be computed for IPv4 and IPv6"
says in rfc6951#section-5.3.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
include/net/netns/sctp.h | 1 +
net/sctp/protocol.c | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)
diff --git a/include/net/netns/sctp.h b/include/net/netns/sctp.h
index 3d10bef..f622945 100644
--- a/include/net/netns/sctp.h
+++ b/include/net/netns/sctp.h@@ -24,6 +24,7 @@ struct netns_sctp { /* udp tunneling listening sock. */ struct sock *udp4_sock; + struct sock *udp6_sock; /* udp tunneling listening port. */ int udp_port;
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index f194b60..0aaa24d 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c@@ -866,6 +866,25 @@ int sctp_udp_sock_start(struct net *net) setup_udp_tunnel_sock(net, sock, &tuncfg); net->sctp.udp4_sock = sock->sk; + memset(&udp_conf, 0, sizeof(udp_conf)); + + udp_conf.family = AF_INET6; + udp_conf.local_ip6 = in6addr_any; + udp_conf.local_udp_port = htons(net->sctp.udp_port); + udp_conf.use_udp6_rx_checksums = true; + udp_conf.ipv6_v6only = true; + err = udp_sock_create(net, &udp_conf, &sock); + if (err) { + udp_tunnel_sock_release(net->sctp.udp4_sock->sk_socket); + net->sctp.udp4_sock = NULL; + return err; + } + + tuncfg.encap_type = 1; + tuncfg.encap_rcv = sctp_udp_rcv; + setup_udp_tunnel_sock(net, sock, &tuncfg); + net->sctp.udp6_sock = sock->sk; + return 0; }
@@ -875,6 +894,10 @@ void sctp_udp_sock_stop(struct net *net) udp_tunnel_sock_release(net->sctp.udp4_sock->sk_socket); net->sctp.udp4_sock = NULL; } + if (net->sctp.udp6_sock) { + udp_tunnel_sock_release(net->sctp.udp6_sock->sk_socket); + net->sctp.udp6_sock = NULL; + } } /* Register address family specific functions. */
--
2.1.0