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authorXin Long <lucien.xin@gmail.com>2020-10-29 10:04:59 +0300
committerJakub Kicinski <kuba@kernel.org>2020-10-31 01:23:56 +0300
commit9d6ba260a0734d5e56243929a69d57ebbf0cb245 (patch)
tree5cc755b4df52f83a869f3b6a345f9de6c903ff3d /net/sctp
parent965ae44412f8c0c19945b3f62bc945ad0b15a8aa (diff)
downloadlinux-9d6ba260a0734d5e56243929a69d57ebbf0cb245.tar.xz
sctp: create udp6 sock and set its encap_rcv
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. v1->v2: - Add pr_err() when fails to create udp v6 sock. - Add #if IS_ENABLED(CONFIG_IPV6) not to create v6 sock when ipv6 is disabled. Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/sctp')
-rw-r--r--net/sctp/protocol.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 0f7933422d8e..8410c9a3f145 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -869,6 +869,28 @@ int sctp_udp_sock_start(struct net *net)
setup_udp_tunnel_sock(net, sock, &tuncfg);
net->sctp.udp4_sock = sock->sk;
+#if IS_ENABLED(CONFIG_IPV6)
+ 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) {
+ pr_err("Failed to create the SCTP UDP tunneling v6 sock\n");
+ 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;
+#endif
+
return 0;
}
@@ -878,6 +900,10 @@ 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. */