netdev - [PATCH v3 net-next 6/7] udp: UDP tunnel flow dissection infrastructure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20161018170243.1369807-7-tom@herbertland.com>
Date:   Tue, 18 Oct 2016 10:02:42 -0700
From:   Tom Herbert <tom@...bertland.com>
To:     <davem@...emloft.net>, <netdev@...r.kernel.org>
CC:     <kernel-team@...com>
Subject: [PATCH v3 net-next 6/7] udp: UDP tunnel flow dissection infrastructure

Add infrastructure to allow UDP tunnels to setup flow dissecion.

Signed-off-by: Tom Herbert <tom@...bertland.com>
---
 include/net/udp_tunnel.h | 5 +++++
 net/ipv4/udp_tunnel.c    | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
index 02c5be0..81d2584 100644
--- a/include/net/udp_tunnel.h
+++ b/include/net/udp_tunnel.h
@@ -69,6 +69,10 @@ typedef struct sk_buff **(*udp_tunnel_gro_receive_t)(struct sock *sk,
 						     struct sk_buff *skb);
 typedef int (*udp_tunnel_gro_complete_t)(struct sock *sk, struct sk_buff *skb,
 					 int nhoff);
+typedef int (*udp_tunnel_flow_dissect_t)(struct sock *sk,
+					 const struct sk_buff *skb,
+					 void *data, int hlen, int *nhoff,
+					 u8 *ip_proto, __be16 *proto);
 
 struct udp_tunnel_sock_cfg {
 	void *sk_user_data;     /* user data used by encap_rcv call back */
@@ -78,6 +82,7 @@ struct udp_tunnel_sock_cfg {
 	udp_tunnel_encap_destroy_t encap_destroy;
 	udp_tunnel_gro_receive_t gro_receive;
 	udp_tunnel_gro_complete_t gro_complete;
+	udp_tunnel_flow_dissect_t flow_dissect;
 };
 
 /* Setup the given (UDP) sock to receive UDP encapsulated packets */
diff --git a/net/ipv4/udp_tunnel.c b/net/ipv4/udp_tunnel.c
index 58bd39f..4459288 100644
--- a/net/ipv4/udp_tunnel.c
+++ b/net/ipv4/udp_tunnel.c
@@ -72,6 +72,11 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
 	udp_sk(sk)->gro_receive = cfg->gro_receive;
 	udp_sk(sk)->gro_complete = cfg->gro_complete;
 
+	if (cfg->flow_dissect) {
+		udp_sk(sk)->flow_dissect = cfg->flow_dissect;
+		udp_flow_dissect_enable();
+	}
+
 	udp_tunnel_encap_enable(sock);
 }
 EXPORT_SYMBOL_GPL(setup_udp_tunnel_sock);
-- 
2.9.3