[NET]: The scheduled removal of the frame diverter.

This patch contains the scheduled removal of the frame diverter.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 4 insertions, 610 deletions

diff --git a/net/Kconfig b/net/Kconfig
index 67e39ad..867f950 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -175,33 +175,6 @@ source "net/ipx/Kconfig"
 source "drivers/net/appletalk/Kconfig"
 source "net/x25/Kconfig"
 source "net/lapb/Kconfig"
-
-config NET_DIVERT
-	bool "Frame Diverter (EXPERIMENTAL)"
-	depends on EXPERIMENTAL && BROKEN
-	---help---
-	  The Frame Diverter allows you to divert packets from the
-	  network, that are not aimed at the interface receiving it (in
-	  promisc. mode). Typically, a Linux box setup as an Ethernet bridge
-	  with the Frames Diverter on, can do some *really* transparent www
-	  caching using a Squid proxy for example.
-
-	  This is very useful when you don't want to change your router's
-	  config (or if you simply don't have access to it).
-
-	  The other possible usages of diverting Ethernet Frames are
-	  numberous:
-	  - reroute smtp traffic to another interface
-	  - traffic-shape certain network streams
-	  - transparently proxy smtp connections
-	  - etc...
-
-	  For more informations, please refer to:
-	  <http://diverter.sourceforge.net/>
-	  <http://perso.wanadoo.fr/magpie/EtherDivert.html>
-
-	  If unsure, say N.
-
 source "net/econet/Kconfig"
 source "net/wanrouter/Kconfig"
 source "net/sched/Kconfig"
diff --git a/net/core/Makefile b/net/core/Makefile
index 1195680..73272d5 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -12,7 +12,6 @@ obj-y		     += dev.o ethtool.o dev_mcast.o dst.o netevent.o \
 
 obj-$(CONFIG_XFRM) += flow.o
 obj-$(CONFIG_SYSFS) += net-sysfs.o
-obj-$(CONFIG_NET_DIVERT) += dv.o
 obj-$(CONFIG_NET_PKTGEN) += pktgen.o
 obj-$(CONFIG_WIRELESS_EXT) += wireless.o
 obj-$(CONFIG_NETPOLL) += netpoll.o
diff --git a/net/core/dev.c b/net/core/dev.c
index 411c242..5bf13b1 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -98,7 +98,6 @@
 #include <linux/seq_file.h>
 #include <linux/stat.h>
 #include <linux/if_bridge.h>
-#include <linux/divert.h>
 #include <net/dst.h>
 #include <net/pkt_sched.h>
 #include <net/checksum.h>
@@ -1827,8 +1826,6 @@ int netif_receive_skb(struct sk_buff *skb)
 ncls:
 #endif
 
-	handle_diverter(skb);
-
 	if (handle_bridge(&skb, &pt_prev, &ret, orig_dev))
 		goto out;
 
@@ -2898,10 +2895,6 @@ int register_netdevice(struct net_device *dev)
 	spin_lock_init(&dev->ingress_lock);
 #endif
 
-	ret = alloc_divert_blk(dev);
-	if (ret)
-		goto out;
-
 	dev->iflink = -1;
 
 	/* Init, if this function is available */
@@ -2910,13 +2903,13 @@ int register_netdevice(struct net_device *dev)
 		if (ret) {
 			if (ret > 0)
 				ret = -EIO;
-			goto out_err;
+			goto out;
 		}
 	}
  
 	if (!dev_valid_name(dev->name)) {
 		ret = -EINVAL;
-		goto out_err;
+		goto out;
 	}
 
 	dev->ifindex = dev_new_index();
@@ -2930,7 +2923,7 @@ int register_netdevice(struct net_device *dev)
 			= hlist_entry(p, struct net_device, name_hlist);
 		if (!strncmp(d->name, dev->name, IFNAMSIZ)) {
 			ret = -EEXIST;
- 			goto out_err;
+ 			goto out;
 		}
  	}
 
@@ -2974,7 +2967,7 @@ int register_netdevice(struct net_device *dev)
 
 	ret = netdev_register_sysfs(dev);
 	if (ret)
-		goto out_err;
+		goto out;
 	dev->reg_state = NETREG_REGISTERED;
 
 	/*
@@ -3001,9 +2994,6 @@ int register_netdevice(struct net_device *dev)
 
 out:
 	return ret;
-out_err:
-	free_divert_blk(dev);
-	goto out;
 }
 
 /**
@@ -3320,8 +3310,6 @@ int unregister_netdevice(struct net_device *dev)
 	/* Notifier chain MUST detach us from master device. */
 	BUG_TRAP(!dev->master);
 
-	free_divert_blk(dev);
-
 	/* Finish processing unregister after unlock */
 	net_set_todo(dev);
 
diff --git a/net/core/dv.c b/net/core/dv.c
deleted file mode 100644
index 29ee77f1..0000000
--- a/net/core/dv.c
+++ /dev/null
@@ -1,546 +0,0 @@
-/*
- * INET		An implementation of the TCP/IP protocol suite for the LINUX
- *		operating system.  INET is implemented using the  BSD Socket
- *		interface as the means of communication with the user level.
- *
- *		Generic frame diversion
- *
- * Authors:	
- * 		Benoit LOCHER:	initial integration within the kernel with support for ethernet
- * 		Dave Miller:	improvement on the code (correctness, performance and source files)
- *
- */
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/inet.h>
-#include <linux/ip.h>
-#include <linux/udp.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <net/dst.h>
-#include <net/arp.h>
-#include <net/sock.h>
-#include <net/ipv6.h>
-#include <net/ip.h>
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <asm/checksum.h>
-#include <linux/divert.h>
-#include <linux/sockios.h>
-
-const char sysctl_divert_version[32]="0.46";	/* Current version */
-
-static int __init dv_init(void)
-{
-	return 0;
-}
-module_init(dv_init);
-
-/*
- * Allocate a divert_blk for a device. This must be an ethernet nic.
- */
-int alloc_divert_blk(struct net_device *dev)
-{
-	int alloc_size = (sizeof(struct divert_blk) + 3) & ~3;
-
-	dev->divert = NULL;
-	if (dev->type == ARPHRD_ETHER) {
-		dev->divert = kzalloc(alloc_size, GFP_KERNEL);
-		if (dev->divert == NULL) {
-			printk(KERN_INFO "divert: unable to allocate divert_blk for %s\n",
-			       dev->name);
-			return -ENOMEM;
-		}
-		dev_hold(dev);
-	}
-
-	return 0;
-} 
-
-/*
- * Free a divert_blk allocated by the above function, if it was 
- * allocated on that device.
- */
-void free_divert_blk(struct net_device *dev)
-{
-	if (dev->divert) {
-		kfree(dev->divert);
-		dev->divert=NULL;
-		dev_put(dev);
-	}
-}
-
-/*
- * Adds a tcp/udp (source or dest) port to an array
- */
-static int add_port(u16 ports[], u16 port)
-{
-	int i;
-
-	if (port == 0)
-		return -EINVAL;
-
-	/* Storing directly in network format for performance,
-	 * thanks Dave :)
-	 */
-	port = htons(port);
-
-	for (i = 0; i < MAX_DIVERT_PORTS; i++) {
-		if (ports[i] == port)
-			return -EALREADY;
-	}
-	
-	for (i = 0; i < MAX_DIVERT_PORTS; i++) {
-		if (ports[i] == 0) {
-			ports[i] = port;
-			return 0;
-		}
-	}
-
-	return -ENOBUFS;
-}
-
-/*
- * Removes a port from an array tcp/udp (source or dest)
- */
-static int remove_port(u16 ports[], u16 port)
-{
-	int i;
-
-	if (port == 0)
-		return -EINVAL;
-	
-	/* Storing directly in network format for performance,
-	 * thanks Dave !
-	 */
-	port = htons(port);
-
-	for (i = 0; i < MAX_DIVERT_PORTS; i++) {
-		if (ports[i] == port) {
-			ports[i] = 0;
-			return 0;
-		}
-	}
-
-	return -EINVAL;
-}
-
-/* Some basic sanity checks on the arguments passed to divert_ioctl() */
-static int check_args(struct divert_cf *div_cf, struct net_device **dev)
-{
-	char devname[32];
-	int ret;
-
-	if (dev == NULL)
-		return -EFAULT;
-	
-	/* GETVERSION: all other args are unused */
-	if (div_cf->cmd == DIVCMD_GETVERSION)
-		return 0;
-	
-	/* Network device index should reasonably be between 0 and 1000 :) */
-	if (div_cf->dev_index < 0 || div_cf->dev_index > 1000) 
-		return -EINVAL;
-			
-	/* Let's try to find the ifname */
-	sprintf(devname, "eth%d", div_cf->dev_index);
-	*dev = dev_get_by_name(devname);
-	
-	/* dev should NOT be null */
-	if (*dev == NULL)
-		return -EINVAL;
-
-	ret = 0;
-
-	/* user issuing the ioctl must be a super one :) */
-	if (!capable(CAP_SYS_ADMIN)) {
-		ret = -EPERM;
-		goto out;
-	}
-
-	/* Device must have a divert_blk member NOT null */
-	if ((*dev)->divert == NULL)
-		ret = -EINVAL;
-out:
-	dev_put(*dev);
-	return ret;
-}
-
-/*
- * control function of the diverter
- */
-#if 0
-#define	DVDBG(a)	\
-	printk(KERN_DEBUG "divert_ioctl() line %d %s\n", __LINE__, (a))
-#else
-#define	DVDBG(a)
-#endif
-
-int divert_ioctl(unsigned int cmd, struct divert_cf __user *arg)
-{
-	struct divert_cf	div_cf;
-	struct divert_blk	*div_blk;
-	struct net_device	*dev;
-	int			ret;
-
-	switch (cmd) {
-	case SIOCGIFDIVERT:
-		DVDBG("SIOCGIFDIVERT, copy_from_user");
-		if (copy_from_user(&div_cf, arg, sizeof(struct divert_cf)))
-			return -EFAULT;
-		DVDBG("before check_args");
-		ret = check_args(&div_cf, &dev);
-		if (ret)
-			return ret;
-		DVDBG("after checkargs");
-		div_blk = dev->divert;
-			
-		DVDBG("befre switch()");
-		switch (div_cf.cmd) {
-		case DIVCMD_GETSTATUS:
-			/* Now, just give the user the raw divert block
-			 * for him to play with :)
-			 */
-			if (copy_to_user(div_cf.arg1.ptr, dev->divert,
-					 sizeof(struct divert_blk)))
-				return -EFAULT;
-			break;
-
-		case DIVCMD_GETVERSION:
-			DVDBG("GETVERSION: checking ptr");
-			if (div_cf.arg1.ptr == NULL)
-				return -EINVAL;
-			DVDBG("GETVERSION: copying data to userland");
-			if (copy_to_user(div_cf.arg1.ptr,
-					 sysctl_divert_version, 32))
-				return -EFAULT;
-			DVDBG("GETVERSION: data copied");
-			break;
-
-		default:
-			return -EINVAL;
-		}
-
-		break;
-
-	case SIOCSIFDIVERT:
-		if (copy_from_user(&div_cf, arg, sizeof(struct divert_cf)))
-			return -EFAULT;
-
-		ret = check_args(&div_cf, &dev);
-		if (ret)
-			return ret;
-
-		div_blk = dev->divert;
-
-		switch(div_cf.cmd) {
-		case DIVCMD_RESET:
-			div_blk->divert = 0;
-			div_blk->protos = DIVERT_PROTO_NONE;
-			memset(div_blk->tcp_dst, 0,
-			       MAX_DIVERT_PORTS * sizeof(u16));
-			memset(div_blk->tcp_src, 0,
-			       MAX_DIVERT_PORTS * sizeof(u16));
-			memset(div_blk->udp_dst, 0,
-			       MAX_DIVERT_PORTS * sizeof(u16));
-			memset(div_blk->udp_src, 0,
-			       MAX_DIVERT_PORTS * sizeof(u16));
-			return 0;
-				
-		case DIVCMD_DIVERT:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ENABLE:
-				if (div_blk->divert)
-					return -EALREADY;
-				div_blk->divert = 1;
-				break;
-
-			case DIVARG1_DISABLE:
-				if (!div_blk->divert)
-					return -EALREADY;
-				div_blk->divert = 0;
-				break;
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_IP:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ENABLE:
-				if (div_blk->protos & DIVERT_PROTO_IP)
-					return -EALREADY;
-				div_blk->protos |= DIVERT_PROTO_IP;
-				break;
-
-			case DIVARG1_DISABLE:
-				if (!(div_blk->protos & DIVERT_PROTO_IP))
-					return -EALREADY;
-				div_blk->protos &= ~DIVERT_PROTO_IP;
-				break;
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_TCP:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ENABLE:
-				if (div_blk->protos & DIVERT_PROTO_TCP)
-					return -EALREADY;
-				div_blk->protos |= DIVERT_PROTO_TCP;
-				break;
-
-			case DIVARG1_DISABLE:
-				if (!(div_blk->protos & DIVERT_PROTO_TCP))
-					return -EALREADY;
-				div_blk->protos &= ~DIVERT_PROTO_TCP;
-				break;
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_TCPDST:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ADD:
-				return add_port(div_blk->tcp_dst,
-						div_cf.arg2.uint16);
-				
-			case DIVARG1_REMOVE:
-				return remove_port(div_blk->tcp_dst,
-						   div_cf.arg2.uint16);
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_TCPSRC:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ADD:
-				return add_port(div_blk->tcp_src,
-						div_cf.arg2.uint16);
-
-			case DIVARG1_REMOVE:
-				return remove_port(div_blk->tcp_src,
-						   div_cf.arg2.uint16);
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_UDP:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ENABLE:
-				if (div_blk->protos & DIVERT_PROTO_UDP)
-					return -EALREADY;
-				div_blk->protos |= DIVERT_PROTO_UDP;
-				break;
-
-			case DIVARG1_DISABLE:
-				if (!(div_blk->protos & DIVERT_PROTO_UDP))
-					return -EALREADY;
-				div_blk->protos &= ~DIVERT_PROTO_UDP;
-				break;
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_UDPDST:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ADD:
-				return add_port(div_blk->udp_dst,
-						div_cf.arg2.uint16);
-
-			case DIVARG1_REMOVE:
-				return remove_port(div_blk->udp_dst,
-						   div_cf.arg2.uint16);
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_UDPSRC:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ADD:
-				return add_port(div_blk->udp_src,
-						div_cf.arg2.uint16);
-
-			case DIVARG1_REMOVE:
-				return remove_port(div_blk->udp_src,
-						   div_cf.arg2.uint16);
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		case DIVCMD_ICMP:
-			switch(div_cf.arg1.int32) {
-			case DIVARG1_ENABLE:
-				if (div_blk->protos & DIVERT_PROTO_ICMP)
-					return -EALREADY;
-				div_blk->protos |= DIVERT_PROTO_ICMP;
-				break;
-
-			case DIVARG1_DISABLE:
-				if (!(div_blk->protos & DIVERT_PROTO_ICMP))
-					return -EALREADY;
-				div_blk->protos &= ~DIVERT_PROTO_ICMP;
-				break;
-
-			default:
-				return -EINVAL;
-			}
-
-			break;
-
-		default:
-			return -EINVAL;
-		}
-
-		break;
-
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-
-/*
- * Check if packet should have its dest mac address set to the box itself
- * for diversion
- */
-
-#define	ETH_DIVERT_FRAME(skb) \
-	memcpy(eth_hdr(skb), skb->dev->dev_addr, ETH_ALEN); \
-	skb->pkt_type=PACKET_HOST
-		
-void divert_frame(struct sk_buff *skb)
-{
-	struct ethhdr			*eth = eth_hdr(skb);
-	struct iphdr			*iph;
-	struct tcphdr			*tcph;
-	struct udphdr			*udph;
-	struct divert_blk		*divert = skb->dev->divert;
-	int				i, src, dst;
-	unsigned char			*skb_data_end = skb->data + skb->len;
-
-	/* Packet is already aimed at us, return */
-	if (!compare_ether_addr(eth->h_dest, skb->dev->dev_addr))
-		return;
-	
-	/* proto is not IP, do nothing */
-	if (eth->h_proto != htons(ETH_P_IP))
-		return;
-	
-	/* Divert all IP frames ? */
-	if (divert->protos & DIVERT_PROTO_IP) {
-		ETH_DIVERT_FRAME(skb);
-		return;
-	}
-	
-	/* Check for possible (maliciously) malformed IP frame (thanks Dave) */
-	iph = (struct iphdr *) skb->data;
-	if (((iph->ihl<<2)+(unsigned char*)(iph)) >= skb_data_end) {
-		printk(KERN_INFO "divert: malformed IP packet !\n");
-		return;
-	}
-
-	switch (iph->protocol) {
-	/* Divert all ICMP frames ? */
-	case IPPROTO_ICMP:
-		if (divert->protos & DIVERT_PROTO_ICMP) {
-			ETH_DIVERT_FRAME(skb);
-			return;
-		}
-		break;
-
-	/* Divert all TCP frames ? */
-	case IPPROTO_TCP:
-		if (divert->protos & DIVERT_PROTO_TCP) {
-			ETH_DIVERT_FRAME(skb);
-			return;
-		}
-
-		/* Check for possible (maliciously) malformed IP
-		 * frame (thanx Dave)
-		 */
-		tcph = (struct tcphdr *)
-			(((unsigned char *)iph) + (iph->ihl<<2));
-		if (((unsigned char *)(tcph+1)) >= skb_data_end) {
-			printk(KERN_INFO "divert: malformed TCP packet !\n");
-			return;
-		}
-
-		/* Divert some tcp dst/src ports only ?*/
-		for (i = 0; i < MAX_DIVERT_PORTS; i++) {
-			dst = divert->tcp_dst[i];
-			src = divert->tcp_src[i];
-			if ((dst && dst == tcph->dest) ||
-			    (src && src == tcph->source)) {
-				ETH_DIVERT_FRAME(skb);
-				return;
-			}
-		}
-		break;
-
-	/* Divert all UDP frames ? */
-	case IPPROTO_UDP:
-		if (divert->protos & DIVERT_PROTO_UDP) {
-			ETH_DIVERT_FRAME(skb);
-			return;
-		}
-
-		/* Check for possible (maliciously) malformed IP
-		 * packet (thanks Dave)
-		 */
-		udph = (struct udphdr *)
-			(((unsigned char *)iph) + (iph->ihl<<2));
-		if (((unsigned char *)(udph+1)) >= skb_data_end) {
-			printk(KERN_INFO
-			       "divert: malformed UDP packet !\n");
-			return;
-		}
-
-		/* Divert some udp dst/src ports only ? */
-		for (i = 0; i < MAX_DIVERT_PORTS; i++) {
-			dst = divert->udp_dst[i];
-			src = divert->udp_src[i];
-			if ((dst && dst == udph->dest) ||
-			    (src && src == udph->source)) {
-				ETH_DIVERT_FRAME(skb);
-				return;
-			}
-		}
-		break;
-	}
-}
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 0253413..1e75b15 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -21,10 +21,6 @@ extern __u32 sysctl_rmem_max;
 
 extern int sysctl_core_destroy_delay;
 
-#ifdef CONFIG_NET_DIVERT
-extern char sysctl_divert_version[];
-#endif /* CONFIG_NET_DIVERT */
-
 #ifdef CONFIG_XFRM
 extern u32 sysctl_xfrm_aevent_etime;
 extern u32 sysctl_xfrm_aevent_rseqth;
@@ -105,16 +101,6 @@ ctl_table core_table[] = {
 		.mode		= 0644,
 		.proc_handler	= &proc_dointvec
 	},
-#ifdef CONFIG_NET_DIVERT
-	{
-		.ctl_name	= NET_CORE_DIVERT_VERSION,
-		.procname	= "divert_version",
-		.data		= (void *)sysctl_divert_version,
-		.maxlen		= 32,
-		.mode		= 0444,
-		.proc_handler	= &proc_dostring
-	},
-#endif /* CONFIG_NET_DIVERT */
 #ifdef CONFIG_XFRM
 	{
 		.ctl_name	= NET_CORE_AEVENT_ETIME,
diff --git a/net/socket.c b/net/socket.c
index 6c9b9b3..e8db547 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -77,7 +77,6 @@
 #include <linux/cache.h>
 #include <linux/module.h>
 #include <linux/highmem.h>
-#include <linux/divert.h>
 #include <linux/mount.h>
 #include <linux/security.h>
 #include <linux/syscalls.h>
@@ -852,11 +851,6 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
 				err = vlan_ioctl_hook(argp);
 			mutex_unlock(&vlan_ioctl_mutex);
 			break;
-		case SIOCGIFDIVERT:
-		case SIOCSIFDIVERT:
-			/* Convert this to call through a hook */
-			err = divert_ioctl(cmd, argp);
-			break;
 		case SIOCADDDLCI:
 		case SIOCDELDLCI:
 			err = -ENOPKG;