Commit 7441698f authored by Stephen Hemminger's avatar Stephen Hemminger
Browse files

beceem: remove ARP spoofing 



Linux support NOARP flag, so the whole Arp spoofing routines
are not needed.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
parent 6ba8fe77

drivers/staging/bcm/Arp.c

deleted100644 → 0
+0 −94
Original line number Diff line number Diff line 


/*

 * File Name: Arp.c

 * Abstract: This file contains the routines for handling ARP PACKETS

 */

#include "headers.h"

#define	ARP_PKT_SIZE	60



/* =========================================================================

 * Function    - reply_to_arp_request()

 *

 * Description - When this host tries to broadcast ARP request packet through

 *		 		 the virtual interface (veth0), reply directly to upper layer.

 *		 		 This function allocates a new skb for ARP reply packet,

 *		 		 fills in the fields of the packet and then sends it to

 *		 		 upper layer.

 *

 * Parameters  - skb:	Pointer to sk_buff structure of the ARP request pkt.

 *

 * Returns     - None

 * =========================================================================*/



VOID

reply_to_arp_request(struct sk_buff *skb)

{

	PMINI_ADAPTER		Adapter;

	struct ArpHeader 	*pArpHdr = NULL;

	struct ethhdr		*pethhdr = NULL;

	UCHAR 				uiIPHdr[4];

	/* Check for valid skb */

	if(skb == NULL)

	{

		BCM_DEBUG_PRINT(Adapter,DBG_TYPE_PRINTK, 0, 0, "Invalid skb: Cannot reply to ARP request\n");

		return;

	}





	Adapter = GET_BCM_ADAPTER(skb->dev);

	/* Print the ARP Request Packet */

	BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, ARP_RESP, DBG_LVL_ALL, "ARP Packet Dump :");

	BCM_DEBUG_PRINT_BUFFER(Adapter,DBG_TYPE_TX, ARP_RESP, DBG_LVL_ALL, (PUCHAR)(skb->data), skb->len);



	/*

	 * Extract the Ethernet Header and Arp Payload including Header

     */

	pethhdr = (struct ethhdr *)skb->data;

	pArpHdr  = (struct ArpHeader *)(skb->data+ETH_HLEN);



	if(Adapter->bETHCSEnabled)

	{

		if(memcmp(pethhdr->h_source, Adapter->dev->dev_addr, ETH_ALEN))

		{

			dev_kfree_skb(skb);

			return;

		}

	}



	// Set the Ethernet Header First.

	memcpy(pethhdr->h_dest, pethhdr->h_source, ETH_ALEN);

	if(!memcmp(pethhdr->h_source, Adapter->dev->dev_addr, ETH_ALEN))

	{

		pethhdr->h_source[5]++;

	}



	/* Set the reply to ARP Reply */

	pArpHdr->arp.ar_op = ntohs(ARPOP_REPLY);



	/* Set the HW Address properly */

	memcpy(pArpHdr->ar_sha, pethhdr->h_source, ETH_ALEN);

	memcpy(pArpHdr->ar_tha, pethhdr->h_dest, ETH_ALEN);



	// Swapping the IP Adddress

	memcpy(uiIPHdr,pArpHdr->ar_sip,4);

	memcpy(pArpHdr->ar_sip,pArpHdr->ar_tip,4);

	memcpy(pArpHdr->ar_tip,uiIPHdr,4);



	/* Print the ARP Reply Packet */



	BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, ARP_RESP, DBG_LVL_ALL, "ARP REPLY PACKET: ");



	/* Send the Packet to upper layer */

	BCM_DEBUG_PRINT_BUFFER(Adapter,DBG_TYPE_TX, ARP_RESP, DBG_LVL_ALL, (PUCHAR)(skb->data), skb->len);



	skb->protocol = eth_type_trans(skb,skb->dev);

	skb->pkt_type = PACKET_HOST;



//	skb->mac.raw=skb->data+LEADER_SIZE;

	skb_set_mac_header (skb, LEADER_SIZE);

	netif_rx(skb);

	BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, ARP_RESP, DBG_LVL_ALL, "<=============\n");

	return;

}

drivers/staging/bcm/Bcmnet.c

+3 −0
Original line number Diff line number Diff line
@@ -124,6 +124,9 @@ int register_networkdev(PMINI_ADAPTER Adapter) 
	net->ethtool_ops = &bcm_ethtool_ops;

	net->mtu          = MTU_SIZE; /* 1400 Bytes */

	net->tx_queue_len = TX_QLEN;

	net->flags |= IFF_NOARP;

	net->flags &= ~(IFF_BROADCAST|IFF_MULTICAST);



	netif_carrier_off(net);



	SET_NETDEV_DEVTYPE(net, &wimax_type);

drivers/staging/bcm/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ obj-$(CONFIG_BCM_WIMAX) += bcm_wimax.o 


bcm_wimax-y :=  InterfaceDld.o InterfaceIdleMode.o InterfaceInit.o InterfaceRx.o \

		InterfaceIsr.o InterfaceMisc.o InterfaceTx.o \

		Arp.o CmHost.o IPv6Protocol.o Qos.o Transmit.o\

		CmHost.o IPv6Protocol.o Qos.o Transmit.o\

		Bcmnet.o DDRInit.o HandleControlPacket.o\

		LeakyBucket.o Misc.o sort.o Bcmchar.o hostmibs.o PHSModule.o\

		led_control.o nvm.o vendorspecificextn.o

drivers/staging/bcm/Transmit.c

+3 −12
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ 
digraph transmit1 {

node[shape=box]

edge[weight=5;color=red]

bcm_transmit->reply_to_arp_request[label="ARP"]



bcm_transmit->GetPacketQueueIndex[label="IP Packet"]

GetPacketQueueIndex->IpVersion4[label="IPV4"]

GetPacketQueueIndex->IpVersion6[label="IPV6"]
@@ -63,18 +63,9 @@ netdev_tx_t bcm_transmit(struct sk_buff *skb, struct net_device *dev) 


	qindex = GetPacketQueueIndex(Adapter, skb);



	if (INVALID_QUEUE_INDEX==qindex)	{

		if (ntohs(eth_hdr(skb)->h_proto) != ETH_ARP_FRAME)

	if (INVALID_QUEUE_INDEX==qindex)

		goto drop;



		/*

		  Reply directly to ARP request packet

		  ARP Spoofing only if NO ETH CS rule matches for it

		*/

		reply_to_arp_request(skb);

		return NETDEV_TX_OK;

	}



	if (Adapter->PackInfo[qindex].uiCurrentPacketsOnHost >= SF_MAX_ALLOWED_PACKETS_TO_BACKUP)

		return NETDEV_TX_BUSY;