Re: [squid-users] Messages of WCCP or IPTABLES?

> > Which ip_wccp module are you using? The ip_wccp.c linked from the FAQ is
> > recommended.
> >
> > Regards
> > Henrik
>
> I'm using the patch below (my kernel is 2.4.25). I will try to use the
> ip_wccp.c from the FAQ and compile it manually.
>
> Thx & Rgds,
>
> Awie
>
> ==== SNIP ====
>
> diff -uNr linux-2.4.25/Documentation/Configure.help
> linux/Documentation/Configure.help
>
> --- linux-2.4.25/Documentation/Configure.help Tue Feb 26 01:07:51 2002
>
> +++ linux/Documentation/Configure.help Sat Mar 2 12:28:17 2002
>
> @@ -5198,6 +5198,15 @@
>
> Network), but can be distributed all over the Internet. If you want
>
> to do that, say Y here and to "IP multicast routing" below.
>
> +WCCP tunnels over IP
>
> +CONFIG_NET_IPWCCP
>
> + Tunneling means encapsulating data of one protocol type within
>
> + another protocol and sending it over a channel that understands the
>
> + encapsulating protocol. This particular tunneling driver implements
>
> + WCCP (Web Cache Coordination Protocol) GRE. This driver is useful
>
> + if you have a WCCP-enabled router, and would like to use WCCP to
>
> + redirect packets to a web cache.
>
> +
>
> IP multicast routing
>
> CONFIG_IP_MROUTE
>
> This is used if you want your machine to act as a router for IP
>
> diff -uNr linux-2.4.25/net/ipv4/Config.in linux/net/ipv4/Config.in
>
> --- linux-2.4.25/net/ipv4/Config.in Fri Dec 21 23:12:05 2001
>
> +++ linux/net/ipv4/Config.in Sat Mar 2 12:29:19 2002
>
> @@ -26,6 +26,7 @@
>
> fi
>
> tristate ' IP: tunneling' CONFIG_NET_IPIP
>
> tristate ' IP: GRE tunnels over IP' CONFIG_NET_IPGRE
>
> +tristate ' IP: WCCP GRE tunnels over IP' CONFIG_NET_IPWCCP
>
> if [ "$CONFIG_IP_MULTICAST" = "y" ]; then
>
> if [ "$CONFIG_NET_IPGRE" != "n" ]; then
>
> bool ' IP: broadcast GRE over IP' CONFIG_NET_IPGRE_BROADCAST
>
> diff -uNr linux-2.4.25/net/ipv4/Makefile linux/net/ipv4/Makefile
>
> --- linux-2.4.25/net/ipv4/Makefile Fri Dec 21 23:12:05 2001
>
> +++ linux/net/ipv4/Makefile Fri Jul 5 09:00:53 2002
>
> @@ -9,7 +9,7 @@
>
> O_TARGET := ipv4.o
>
> -export-objs = ipip.o ip_gre.o
>
> +export-objs = ipip.o ip_gre.o ip_wccp.o
>
> obj-y := utils.o route.o inetpeer.o proc.o protocol.o \
>
> ip_input.o ip_fragment.o ip_forward.o ip_options.o \
>
> @@ -23,6 +23,7 @@
>
> obj-$(CONFIG_IP_MROUTE) += ipmr.o
>
> obj-$(CONFIG_NET_IPIP) += ipip.o
>
> obj-$(CONFIG_NET_IPGRE) += ip_gre.o
>
> +obj-$(CONFIG_NET_IPWCCP) += ip_wccp.o
>
> obj-$(CONFIG_SYN_COOKIES) += syncookies.o
>
> obj-$(CONFIG_IP_PNP) += ipconfig.o
>
> diff -uNr linux-2.4.25/net/ipv4/ip_wccp.c linux/net/ipv4/ip_wccp.c
>
> --- linux-2.4.25/net/ipv4/ip_wccp.c Fri Jul 5 11:14:24 2002
>
> +++ linux/net/ipv4/ip_wccp.c Tue Mar 5 11:44:11 2002
>
> @@ -0,0 +1,91 @@
>
> +/*
>
> + * $Id: ip_wccp.c,v 1.1 1999/09/30 20:43:37 wessels Exp $
>
> + *
>
> + * Glenn Chisholm <glenn@ircache.net>
>
> + */
>
> +
>
> +#include <linux/config.h>
>
> +#include <linux/module.h>
>
> +#include <linux/types.h>
>
> +#include <linux/sched.h>
>
> +#include <linux/kernel.h>
>
> +#include <linux/skbuff.h>
>
> +#include <linux/netdevice.h>
>
> +#include <linux/in.h>
>
> +#include <linux/if_arp.h>
>
> +#include <linux/init.h>
>
> +#include <linux/inetdevice.h>
>
> +
>
> +#include <net/ip.h>
>
> +
>
> +#define WCCP_PROTOCOL_TYPE 0x883E
>
> +#define WCCP_GRE_LEN sizeof(long)
>
> +#define WCCP2_GRE_EXTRA sizeof(long)
>
> +
>
> +/* Deal with CONFIG_MODVERSIONS */
>
> +#if CONFIG_MODVERSIONS==1
>
> +#define MODVERSIONS
>
> +#include <linux/modversions.h>
>
> +#endif
>
> +
>
> +int ip_wccp_rcv(struct sk_buff *skb, unsigned short len)
>
> +{
>
> + long *gre_hdr;
>
> +
>
> + gre_hdr = (unsigned long *)skb->h.raw;
>
> + if(*gre_hdr != htonl(WCCP_PROTOCOL_TYPE)) {
>
> + goto drop;
>
> + }
>
> +
>
> + skb->mac.raw = skb->nh.raw;
>
> + /* WCCP2 puts an extra 4 octets into the header, but uses the same
>
> + encapsulation type; if it looks as if the first octet of the packet
>
> + isn't the beginning of an IPv4 header, assume it's WCCP2. */
>
> + if ((skb->h.raw[WCCP_GRE_LEN] & 0xF0) != 0x40) {
>
> + skb->nh.raw = skb_pull(skb, skb->h.raw + WCCP_GRE_LEN +
WCCP2_GRE_EXTRA -
> skb->data);
>
> + } else {
>
> + skb->nh.raw = skb_pull(skb, skb->h.raw + WCCP_GRE_LEN - skb->data);
>
> + }
>
> +
>
> + if (skb->len <= 0)
>
> + goto drop;
>
> +
>
> + memset(&(IPCB(skb)->opt), 0, sizeof(struct ip_options));
>
> + skb->protocol = __constant_htons(ETH_P_IP);
>
> + skb->pkt_type = PACKET_HOST;
>
> + skb->ip_summed = 0;
>
> + dst_release(skb->dst);
>
> + skb->dst = NULL;
>
> +
>
> + return ip_rcv(skb, skb->dev, NULL);
>
> +
>
> +drop:
>
> + kfree_skb(skb);
>
> + return(0);
>
> +}
>
> +
>
> +static struct inet_protocol ipgre_protocol = {
>
> + ip_wccp_rcv,
>
> + NULL,
>
> + 0,
>
> + IPPROTO_GRE,
>
> + 0,
>
> + NULL,
>
> + "GRE"
>
> +};
>
> +
>
> +int init_module(void)
>
> +{
>
> + printk(KERN_INFO "WCCP IPv4/GRE driver\n");
>
> + inet_add_protocol(&ipgre_protocol);
>
> + return 0;
>
> +}
>
> +
>
> +void cleanup_module(void)
>
> +{
>
> + if ( inet_del_protocol(&ipgre_protocol) < 0 )
>
> + printk(KERN_INFO "ipgre close: can't remove protocol\n");
>
> + else
>
> + printk(KERN_INFO "WCCP IPv4/GRE driver unloaded\n");
>
> +}
>
> +
>
Received on Thu Apr 01 2004 - 06:17:45 MST