netdev - [PATCH v2 net-next 4/4] ip_tunnel: Add GUE support

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: <1412376490-8774-5-git-send-email-therbert@google.com>
Date:	Fri,  3 Oct 2014 15:48:10 -0700
From:	Tom Herbert <therbert@...gle.com>
To:	davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH v2 net-next 4/4] ip_tunnel: Add GUE support

This patch allows configuring IPIP, sit, and GRE tunnels to use GUE.
This is very similar to fou excpet that we need to insert the GUE header
in addition to the UDP header on transmit.

Signed-off-by: Tom Herbert <therbert@...gle.com>
---
 include/uapi/linux/if_tunnel.h |  1 +
 net/ipv4/ip_tunnel.c           | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/uapi/linux/if_tunnel.h b/include/uapi/linux/if_tunnel.h
index 7c832af..280d9e0 100644
--- a/include/uapi/linux/if_tunnel.h
+++ b/include/uapi/linux/if_tunnel.h
@@ -64,6 +64,7 @@ enum {
 enum tunnel_encap_types {
 	TUNNEL_ENCAP_NONE,
 	TUNNEL_ENCAP_FOU,
+	TUNNEL_ENCAP_GUE,
 };
 
 #define TUNNEL_ENCAP_FLAG_CSUM		(1<<0)
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 54ace25..79f2ac0 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -56,6 +56,7 @@
 #include <net/netns/generic.h>
 #include <net/rtnetlink.h>
 #include <net/udp.h>
+#include <net/gue.h>
 
 #if IS_ENABLED(CONFIG_IPV6)
 #include <net/ipv6.h>
@@ -495,6 +496,8 @@ static int ip_encap_hlen(struct ip_tunnel_encap *e)
 		return 0;
 	case TUNNEL_ENCAP_FOU:
 		return sizeof(struct udphdr);
+	case TUNNEL_ENCAP_GUE:
+		return sizeof(struct udphdr) + sizeof(struct guehdr);
 	default:
 		return -EINVAL;
 	}
@@ -546,6 +549,15 @@ static int fou_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
 	skb_reset_transport_header(skb);
 	uh = udp_hdr(skb);
 
+	if (e->type == TUNNEL_ENCAP_GUE) {
+		struct guehdr *guehdr = (struct guehdr *)&uh[1];
+
+		guehdr->version = 0;
+		guehdr->hlen = 0;
+		guehdr->flags = 0;
+		guehdr->next_hdr = *protocol;
+	}
+
 	uh->dest = e->dport;
 	uh->source = sport;
 	uh->len = htons(skb->len);
@@ -565,6 +577,7 @@ int ip_tunnel_encap(struct sk_buff *skb, struct ip_tunnel *t,
 	case TUNNEL_ENCAP_NONE:
 		return 0;
 	case TUNNEL_ENCAP_FOU:
+	case TUNNEL_ENCAP_GUE:
 		return fou_build_header(skb, &t->encap, t->encap_hlen,
 					protocol, fl4);
 	default:
-- 
2.1.0.rc2.206.gedb03e5

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html