- fix UDP checksums in odd sized packets

PR:		165355
Submitted by:	Y.A.
Obtained from:	debian

net/libnet/Makefile

@@ -7,7 +7,7 @@
 
 PORTNAME=	libnet
 PORTVERSION=	1.1.2.1
-PORTREVISION=	3
+PORTREVISION=	4
 PORTEPOCH=	1
 CATEGORIES=	net
 MASTER_SITES=	http://www.packetfactory.net/libnet/dist/ \

net/libnet/files/patch-libnet_checksum.c

@@ -0,0 +1,23 @@
+--- src/libnet_checksum.c.orig	Mon Mar  1 22:26:12 2004
++++ src/libnet_checksum.c	Mon Aug 25 15:44:12 2008
+@@ -42,8 +42,10 @@
+ libnet_in_cksum(u_int16_t *addr, int len)
+ {
+     int sum;
++    u_int16_t last_byte;
+ 
+     sum = 0;
++    last_byte = 0;
+ 
+     while (len > 1)
+     {
+@@ -52,7 +54,8 @@
+     }
+     if (len == 1)
+     {
+-        sum += *(u_int16_t *)addr;
++        *(u_int8_t*)&last_byte = *(u_int8_t*)addr;
++        sum += last_byte;
+     }
+ 
+     return (sum);