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
Subject: [PATCHv2 net-next 14/17] sctp: support for sending packet over udp6 sock
Date: Thu, 8 Oct 2020 17:48:10 +0800 [thread overview]
Message-ID: <5c0e9cf835f54c11f7e3014cab926bf10a47298d.1602150362.git.lucien.xin@gmail.com> (raw)
Message-ID: <20201008094810.kM8C9jQgbjoDt_a3-P7BupbtWEkmr96BxjYvKEv7B_4@z> (raw)
In-Reply-To: <1d1b2e92f958add640d5be1e6eaec1ac5e4581ce.1602150362.git.lucien.xin@gmail.com>
In-Reply-To: <cover.1602150362.git.lucien.xin@gmail.com>
This one basically does the similar things in sctp_v6_xmit as does for
udp4 sock in the last patch, just note that:
1. label needs to be calculated, as it's the param of
udp_tunnel6_xmit_skb().
2. The 'nocheck' param of udp_tunnel6_xmit_skb() is false, as
required by RFC.
v1->v2:
- Use sp->udp_port instead in sctp_v6_xmit(), which is more safe.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
net/sctp/ipv6.c | 43 ++++++++++++++++++++++++++++++++-----------
1 file changed, 32 insertions(+), 11 deletions(-)
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index a064bf2..814754d 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -55,6 +55,7 @@
#include <net/inet_common.h>
#include <net/inet_ecn.h>
#include <net/sctp/sctp.h>
+#include <net/udp_tunnel.h>
#include <linux/uaccess.h>
@@ -191,33 +192,53 @@ static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
return ret;
}
-static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport)
+static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *t)
{
+ struct dst_entry *dst = dst_clone(t->dst);
+ struct flowi6 *fl6 = &t->fl.u.ip6;
struct sock *sk = skb->sk;
struct ipv6_pinfo *np = inet6_sk(sk);
- struct flowi6 *fl6 = &transport->fl.u.ip6;
__u8 tclass = np->tclass;
- int res;
+ __be32 label;
pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb,
skb->len, &fl6->saddr, &fl6->daddr);
- if (transport->dscp & SCTP_DSCP_SET_MASK)
- tclass = transport->dscp & SCTP_DSCP_VAL_MASK;
+ if (t->dscp & SCTP_DSCP_SET_MASK)
+ tclass = t->dscp & SCTP_DSCP_VAL_MASK;
if (INET_ECN_is_capable(tclass))
IP6_ECN_flow_xmit(sk, fl6->flowlabel);
- if (!(transport->param_flags & SPP_PMTUD_ENABLE))
+ if (!(t->param_flags & SPP_PMTUD_ENABLE))
skb->ignore_df = 1;
SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS);
- rcu_read_lock();
- res = ip6_xmit(sk, skb, fl6, sk->sk_mark, rcu_dereference(np->opt),
- tclass, sk->sk_priority);
- rcu_read_unlock();
- return res;
+ if (!t->encap_port || !sctp_sk(sk)->udp_port) {
+ int res;
+
+ skb_dst_set(skb, dst);
+ rcu_read_lock();
+ res = ip6_xmit(sk, skb, fl6, sk->sk_mark,
+ rcu_dereference(np->opt),
+ tclass, sk->sk_priority);
+ rcu_read_unlock();
+ return res;
+ }
+
+ if (skb_is_gso(skb))
+ skb_shinfo(skb)->gso_type |= SKB_GSO_UDP_TUNNEL_CSUM;
+
+ skb->encapsulation = 1;
+ skb_reset_inner_mac_header(skb);
+ skb_reset_inner_transport_header(skb);
+ skb_set_inner_ipproto(skb, IPPROTO_SCTP);
+ label = ip6_make_flowlabel(sock_net(sk), skb, fl6->flowlabel, true, fl6);
+
+ return udp_tunnel6_xmit_skb(dst, sk, skb, NULL, &fl6->saddr,
+ &fl6->daddr, tclass, ip6_dst_hoplimit(dst),
+ label, sctp_sk(sk)->udp_port, t->encap_port, false);
}
/* Returns the dst cache entry for the given source and destination ip
--
2.1.0
next prev parent reply other threads:[~2020-10-08 9:50 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 9:47 [PATCHv2 net-next 00/17] sctp: Implement RFC6951: UDP Encapsulation of SCTP Xin Long
2020-10-08 9:47 ` Xin Long
2020-10-08 9:47 ` [PATCHv2 net-next 01/17] udp: check udp sock encap_type in __udp_lib_err Xin Long
2020-10-08 9:47 ` Xin Long
2020-10-08 9:47 ` [PATCHv2 net-next 02/17] udp6: move the mss check after udp gso tunnel processing Xin Long
2020-10-08 9:47 ` Xin Long
2020-10-08 9:47 ` [PATCHv2 net-next 03/17] udp: do checksum properly in skb_udp_tunnel_segment Xin Long
2020-10-08 9:47 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 04/17] udp: support sctp over udp " Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 05/17] sctp: create udp4 sock and add its encap_rcv Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 06/17] sctp: create udp6 sock and set " Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 07/17] sctp: add encap_err_lookup for udp encap socks Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 08/17] sctp: add encap_port for netns sock asoc and transport Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 09/17] sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 10/17] sctp: allow changing transport encap_port by peer packets Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 11/17] sctp: add udphdr to overhead when udp_port is set Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 12/17] sctp: call sk_setup_caps in sctp_packet_transmit instead Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 13/17] sctp: support for sending packet over udp4 sock Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` Xin Long [this message]
2020-10-08 9:48 ` [PATCHv2 net-next 14/17] sctp: support for sending packet over udp6 sock Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 15/17] sctp: add the error cause for new encapsulation port restart Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 16/17] sctp: handle the init chunk matching an existing asoc Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 9:48 ` [PATCHv2 net-next 17/17] sctp: enable udp tunneling socks Xin Long
2020-10-08 9:48 ` Xin Long
2020-10-08 15:46 ` kernel test robot
2020-10-08 15:46 ` kernel test robot
2020-10-09 2:02 ` Xin Long
2020-10-09 2:02 ` Xin Long
2020-10-08 14:33 ` [PATCHv2 net-next 15/17] sctp: add the error cause for new encapsulation port restart kernel test robot
2020-10-08 14:33 ` kernel test robot
2020-10-08 13:10 ` [PATCHv2 net-next 09/17] sctp: add SCTP_REMOTE_UDP_ENCAPS_PORT sockopt kernel test robot
2020-10-08 13:10 ` kernel test robot
2020-10-08 21:18 ` [PATCHv2 net-next 06/17] sctp: create udp6 sock and set its encap_rcv kernel test robot
2020-10-08 21:18 ` kernel test robot
2020-10-09 1:59 ` Xin Long
2020-10-09 1:59 ` Xin Long
2020-10-08 18:29 ` [PATCHv2 net-next 05/17] sctp: create udp4 sock and add " kernel test robot
2020-10-08 18:29 ` kernel test robot
2020-10-09 1:59 ` Xin Long
2020-10-09 1:59 ` Xin Long
2020-10-08 10:01 ` [PATCHv2 net-next 04/17] udp: support sctp over udp in skb_udp_tunnel_segment Xin Long
2020-10-08 10:01 ` Xin Long
2020-10-08 10:01 ` [PATCHv2 net-next 03/17] udp: do checksum properly " Xin Long
2020-10-08 10:01 ` Xin Long
2020-10-08 12:44 ` [PATCHv2 net-next 02/17] udp6: move the mss check after udp gso tunnel processing Willem de Bruijn
2020-10-08 12:44 ` Willem de Bruijn
2020-10-09 1:48 ` Xin Long
2020-10-09 1:48 ` Xin Long
2020-10-09 13:59 ` Willem de Bruijn
2020-10-09 13:59 ` Willem de Bruijn
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