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Don't send arp reply to sender if the arp request queries

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the MAC address for the itself.

Submitted by:	Vlad V Cheryomushkin <vladd@rekom.ru>
This commit is contained in:
Norikatsu Shigemura 2006-04-20 15:01:18 +00:00
parent 4a999037a5
commit 14873171c6
Notes: svn2git 2021-03-31 03:12:20 +00:00 
svn path=/head/; revision=160019
2 changed files with 17 additions and 6 deletions
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2
net-mgmt/choparp/Makefile
View File

@ -7,7 +7,7 @@
PORTNAME= choparp
PORTVERSION= 20021107
PORTREVISION= 1
PORTREVISION= 2
CATEGORIES= net-mgmt
MASTER_SITES= ${MASTER_SITE_SOURCEFORGE}
MASTER_SITE_SUBDIR= choparp

21
net-mgmt/choparp/files/patch-choparp.c
View File

@ -1,5 +1,5 @@
--- choparp.c.orig Fri Nov 8 07:36:03 2002
+++ choparp.c Sat Apr 8 14:37:41 2006
+++ choparp.c Thu Apr 20 23:56:38 2006
@@ -42,6 +42,7 @@
#include <string.h>
#include <sys/types.h>
@ -8,7 +8,18 @@
#include <sys/time.h>
#include <sys/ioctl.h>
#include <net/bpf.h>
@@ -280,13 +281,22 @@
@@ -239,6 +240,10 @@
fprintf(stderr,"checkarp: WARNING: received unknown type ARP request.\n");
return(0);
}
+ if (ntohl(*(u_int32_t *)(arp->arp_tpa)) == ntohl(*(u_int32_t *)(arp->arp_spa))) {
+ fprintf(stderr,"checkarp: WARNING: sender equal dest.\n");
+ return(0);
+ }
target_ip = ntohl(*(u_int32_t *)(arp->arp_tpa));
return match(target_ip, targets) && !match(target_ip, excludes);
}
@@ -280,13 +285,22 @@
char *rframe;
char *sframe;
size_t frame_len;
@ -35,7 +46,7 @@
if (r < 0) {
if (errno == EINTR)
@@ -295,7 +305,7 @@
@@ -295,7 +309,7 @@
return;
}
@ -44,7 +55,7 @@
if (rlen < 0) {
if (errno == EINTR)
continue;
@@ -307,7 +317,7 @@
@@ -307,7 +321,7 @@
while((rframe = getarp(p, rlen, &nextp, &nextlen)) != NULL){
if (checkarp(rframe)){
sframe = gen_arpreply(rframe, &frame_len);
@ -53,7 +64,7 @@
}
p = nextp;
rlen = nextlen;
@@ -437,6 +447,9 @@
@@ -437,6 +451,9 @@
#endif
if ((fd = openbpf(ifname, &buf, &buflen)) < 0)
return(-1);