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From: Xin Long <lucien.xin@gmail.com>
To: network dev <netdev@vger.kernel.org>, linux-sctp@vger.kernel.org
Cc: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
	Neil Horman <nhorman@tuxdriver.com>,
	Michael Tuexen <tuexen@fh-muenster.de>,
	davem@davemloft.net, Jakub Kicinski <kuba@kernel.org>,
	gnault@redhat.com, pabeni@redhat.com,
	willemdebruijn.kernel@gmail.com
Subject: [PATCHv5 net-next 05/16] sctp: create udp6 sock and set its encap_rcv
Date: Thu, 29 Oct 2020 15:04:59 +0800	[thread overview]
Message-ID: <3c26801d36575d0e9c9bd260e6c1f1b67e4b721e.1603955040.git.lucien.xin@gmail.com> (raw)
In-Reply-To: <1cfd9ca0154d35389b25f68457ea2943a19e7da2.1603955040.git.lucien.xin@gmail.com>
In-Reply-To: <cover.1603955040.git.lucien.xin@gmail.com>

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>
---
 include/net/netns/sctp.h |  1 +
 net/sctp/protocol.c      | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/include/net/netns/sctp.h b/include/net/netns/sctp.h
index 8cc9aff..247b401 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 0f79334..8410c9a 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. */
-- 
2.1.0


  reply	other threads:[~2020-10-29  7:35 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-29  7:04 [PATCHv5 net-next 00/16] sctp: Implement RFC6951: UDP Encapsulation of SCTP Xin Long
2020-10-29  7:04 ` [PATCHv5 net-next 01/16] udp: check udp sock encap_type in __udp_lib_err Xin Long
2020-10-29  7:04   ` [PATCHv5 net-next 02/16] udp6: move the mss check after udp gso tunnel processing Xin Long
2020-10-29  7:04     ` [PATCHv5 net-next 03/16] udp: support sctp over udp in skb_udp_tunnel_segment Xin Long
2020-10-29  7:04       ` [PATCHv5 net-next 04/16] sctp: create udp4 sock and add its encap_rcv Xin Long
2020-10-29  7:04         ` Xin Long [this message]
2020-10-29  7:05           ` [PATCHv5 net-next 06/16] sctp: add encap_err_lookup for udp encap socks Xin Long
2020-10-29  7:05             ` [PATCHv5 net-next 07/16] sctp: add encap_port for netns sock asoc and transport Xin Long
2020-10-29  7:05               ` [PATCHv5 net-next 08/16] sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt Xin Long
2020-10-29  7:05                 ` [PATCHv5 net-next 09/16] sctp: allow changing transport encap_port by peer packets Xin Long
2020-10-29  7:05                   ` [PATCHv5 net-next 10/16] sctp: add udphdr to overhead when udp_port is set Xin Long
2020-10-29  7:05                     ` [PATCHv5 net-next 11/16] sctp: call sk_setup_caps in sctp_packet_transmit instead Xin Long
2020-10-29  7:05                       ` [PATCHv5 net-next 12/16] sctp: support for sending packet over udp4 sock Xin Long
2020-10-29  7:05                         ` [PATCHv5 net-next 13/16] sctp: support for sending packet over udp6 sock Xin Long
2020-10-29  7:05                           ` [PATCHv5 net-next 14/16] sctp: add the error cause for new encapsulation port restart Xin Long
2020-10-29  7:05                             ` [PATCHv5 net-next 15/16] sctp: handle the init chunk matching an existing asoc Xin Long
2020-10-29  7:05                               ` [PATCHv5 net-next 16/16] sctp: enable udp tunneling socks Xin Long
2020-10-29 21:55 ` [PATCHv5 net-next 00/16] sctp: Implement RFC6951: UDP Encapsulation of SCTP Marcelo Ricardo Leitner
2020-10-30 23:46 ` Jakub Kicinski

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