From: Paul P Komkoff Jr <i@stingr.net>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [RFC] Preliminary wccp support for ip_gre
Date: Wed, 11 Aug 2004 09:39:00 +0400 [thread overview]
Message-ID: <20040811053900.GA32384@stingr.net> (raw)
Please, can you give a comments on this piece of code?
I haven't attached any turning knobs to it but I will do so when I'll
figure out what knobs and how :)
diff -urN linux-2.6.6-1.435/net/ipv4/ip_gre.c linux-2.6.6-1.435a/net/ipv4/ip_gre.c
--- linux-2.6.6-1.435/net/ipv4/ip_gre.c 2004-05-10 06:32:54.000000000 +0400
+++ linux-2.6.6-1.435a/net/ipv4/ip_gre.c 2004-06-30 16:38:43.781838344 +0400
@@ -553,6 +553,8 @@
return INET_ECN_encapsulate(tos, inner);
}
+#define ETH_P_WCCP 0x883E
+
int ipgre_rcv(struct sk_buff *skb)
{
struct iphdr *iph;
@@ -605,13 +607,21 @@
if ((tunnel = ipgre_tunnel_lookup(iph->saddr, iph->daddr, key)) != NULL) {
secpath_reset(skb);
+ skb->protocol = *(u16*)(h + 2);
+ if (1) {
+ if ((flags == 0) && (skb->protocol == __constant_htons(ETH_P_WCCP))) {
+ skb->protocol = __constant_htons(ETH_P_IP);
+ if ((*(h + offset) & 0xF0) != 0x40)
+ offset += 4;
+ }
+ }
+
skb->mac.raw = skb->nh.raw;
skb->nh.raw = __pskb_pull(skb, offset);
memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
if (skb->ip_summed == CHECKSUM_HW)
skb->csum = csum_sub(skb->csum,
csum_partial(skb->mac.raw, skb->nh.raw-skb->mac.raw, 0));
- skb->protocol = *(u16*)(h + 2);
skb->pkt_type = PACKET_HOST;
#ifdef CONFIG_NET_IPGRE_BROADCAST
if (MULTICAST(iph->daddr)) {
--
Paul P 'Stingray' Komkoff Jr // http://stingr.net/key <- my pgp key
This message represents the official view of the voices in my head
reply other threads:[~2004-08-11 5:39 UTC|newest]
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