##   $Id: diff.if_ethersubr.c,v 1.1.1.1 2000/05/25 00:28:49 route Exp $##   Libnet FreeBSD source etheraddr patch#   (c) 1999 Nicholas Brawn <nick@feralmonkey.org>#   (c) 1998, 1999  Mike D. Schiffman <mike@infonexus.com>#                   route|daemon9 <route@infonexus.com>## Specify Source Hardware Address Patch (FreeBSD 3.x)## This patch enables you to specify a source ethernet address other than your# own when creating custom ethernet packets.  ## To use, copy the patch into /sys/net. Create a backup of if_ethersubr.c,# then: patch < diff.if_ethersubr.c## Recompile your kernel and reboot. You will now have a new sysctl MIB, # net.link.ether.inet.specify_src_hwaddr. To use, you must set it to > 0:## root@kungfu:~# sysctl -w net.link.ether.inet.specify_src_hwaddr=1# net.link.ether.inet.specify_src_hwaddr: 0 -> 1# root@kungfu:~# # # -Nicholas Brawn *** if_ethersubr.c.orig	Mon May 24 20:57:44 1999--- if_ethersubr.c	Sun May 30 15:40:15 1999****************** 111,116 ****--- 111,120 ----  #include <net/if_vlan_var.h>  #endif /* NVLAN > 0 */  + static 	int specify_src_hwaddr = 0;+ SYSCTL_INT(_net_link_ether_inet, OID_AUTO, specify_src_hwaddr, CTLFLAG_RW, + 	&specify_src_hwaddr, 0, ""); +   static	int ether_resolvemulti __P((struct ifnet *, struct sockaddr **,   				    struct sockaddr *));  u_char	etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };****************** 133,138 ****--- 137,143 ----  	short type;  	int s, error = 0;   	u_char edst[6];+ 	u_char esrc[6];  	register struct mbuf *m = m0;  	register struct rtentry *rt;  	register struct ether_header *eh;****************** 333,338 ****--- 338,345 ----  		loop_copy = -1; /* if this is for us, don't do it */  		eh = (struct ether_header *)dst->sa_data;   		(void)memcpy(edst, eh->ether_dhost, sizeof (edst));+ 		if (specify_src_hwaddr)+ 			(void)memcpy(esrc, eh->ether_shost, sizeof (esrc));  		type = eh->ether_type;  		break;  ****************** 353,359 ****  	(void)memcpy(&eh->ether_type, &type,  		sizeof(eh->ether_type));   	(void)memcpy(eh->ether_dhost, edst, sizeof (edst));!  	(void)memcpy(eh->ether_shost, ac->ac_enaddr,  	    sizeof(eh->ether_shost));    	/*--- 360,369 ----  	(void)memcpy(&eh->ether_type, &type,  		sizeof(eh->ether_type));   	(void)memcpy(eh->ether_dhost, edst, sizeof (edst));!  	if (specify_src_hwaddr)!  		(void)memcpy(eh->ether_shost, esrc, sizeof(esrc));!  	else!  		(void)memcpy(eh->ether_shost, ac->ac_enaddr,  	    sizeof(eh->ether_shost));    	/*