##   Libnet FreeBSD source etheraddr patch#   (c) 2000 Matt Bing <matt@csis.gvsu.edu>#   (c) 1999 Nicholas Brawn <nick@feralmonkey.org>#   (c) 1998 - 2001  Mike D. Schiffman <mike@infonexus.com>## Specify Source Hardware Address Patch (FreeBSD 4.0)## 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:Index: if_ethersubr.c===================================================================RCS file: /home/ncvs/src/sys/net/if_ethersubr.c,vretrieving revision 1.70.2.1diff -c -r1.70.2.1 if_ethersubr.c*** if_ethersubr.c	2000/05/01 01:04:41	1.70.2.1--- if_ethersubr.c	2000/05/18 21:17:45****************** 95,100 ****--- 95,105 ----  extern u_char	aarp_org_code[3];  #endif /* NETATALK */  + static int specify_src_hwaddr; /* arbitrary ether src address */+ SYSCTL_DECL(_net_link_ether_inet);+ SYSCTL_INT(_net_link_ether_inet, OID_AUTO, specify_src_hwaddr, CTLFLAG_RW,+        &specify_src_hwaddr, 0, "");+   #ifdef BRIDGE  #include <net/bridge.h>  #endif****************** 318,323 ****--- 323,330 ----  		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;  ****************** 338,344 ****  	(void)memcpy(&eh->ether_type, &type,  		sizeof(eh->ether_type));   	(void)memcpy(eh->ether_dhost, edst, sizeof (edst));! 	if (hdrcmplt)  		(void)memcpy(eh->ether_shost, esrc,  			sizeof(eh->ether_shost));  	else--- 345,351 ----  	(void)memcpy(&eh->ether_type, &type,  		sizeof(eh->ether_type));   	(void)memcpy(eh->ether_dhost, edst, sizeof (edst));! 	if (hdrcmplt || specify_src_hwaddr)  		(void)memcpy(eh->ether_shost, esrc,  			sizeof(eh->ether_shost));  	else