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-rw-r--r--unmaintained/dsniff/0001-arpspoof-add-r-switch-to-poison-both-directions.patch174
1 files changed, 174 insertions, 0 deletions
diff --git a/unmaintained/dsniff/0001-arpspoof-add-r-switch-to-poison-both-directions.patch b/unmaintained/dsniff/0001-arpspoof-add-r-switch-to-poison-both-directions.patch
new file mode 100644
index 0000000000..4576531ad4
--- /dev/null
+++ b/unmaintained/dsniff/0001-arpspoof-add-r-switch-to-poison-both-directions.patch
@@ -0,0 +1,174 @@
+>From 8fbf0ac15e5fe2df427e3e028f9aa8d96788986a Mon Sep 17 00:00:00 2001
+From: Stefan Tomanek <stefan@pico.ruhr.de>
+Date: Sun, 6 Nov 2011 22:44:54 +0100
+Subject: [PATCH 1/3] arpspoof: add -r switch to poison both directions
+
+
+Signed-off-by: Stefan Tomanek <stefan@pico.ruhr.de>
+---
+ arpspoof.8 | 5 ++++-
+ arpspoof.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++------------
+ 2 files changed, 51 insertions(+), 13 deletions(-)
+
+diff --git a/arpspoof.8 b/arpspoof.8
+index a05b5d3..544e06c 100644
+--- a/arpspoof.8
++++ b/arpspoof.8
+@@ -9,7 +9,7 @@ intercept packets on a switched LAN
+ .na
+ .nf
+ .fi
+-\fBarpspoof\fR [\fB-i \fIinterface\fR] [\fB-t \fItarget\fR] \fIhost\fR
++\fBarpspoof\fR [\fB\-i \fIinterface\fR] [\fB\-t \fItarget\fR] [\fB\-r\fR] \fIhost\fR
+ .SH DESCRIPTION
+ .ad
+ .fi
+@@ -26,6 +26,9 @@ Specify the interface to use.
+ .IP "\fB-t \fItarget\fR"
+ Specify a particular host to ARP poison (if not specified, all hosts
+ on the LAN).
++.IP "\fB\-r\fR"
++Poison both hosts (host and target) to capture traffic in both directions.
++(only valid in conjuntion with \-t)
+ .IP \fIhost\fR
+ Specify the host you wish to intercept packets for (usually the local
+ gateway).
+diff --git a/arpspoof.c b/arpspoof.c
+index 7cdbbf8..f51b699 100644
+--- a/arpspoof.c
++++ b/arpspoof.c
+@@ -7,6 +7,8 @@
+ * Copyright (c) 1999 Dug Song <dugsong@monkey.org>
+ *
+ * $Id: arpspoof.c,v 1.5 2001/03/15 08:32:58 dugsong Exp $
++ *
++ * Improved 2011 by Stefan Tomanek <stefa@pico.ruhr.de>
+ */
+
+ #include "config.h"
+@@ -31,12 +33,13 @@ static libnet_t *l;
+ static struct ether_addr spoof_mac, target_mac;
+ static in_addr_t spoof_ip, target_ip;
+ static char *intf;
++static int poison_reverse;
+
+ static void
+ usage(void)
+ {
+ fprintf(stderr, "Version: " VERSION "\n"
+- "Usage: arpspoof [-i interface] [-t target] host\n");
++ "Usage: arpspoof [-i interface] [-t target] [-r] host\n");
+ exit(1);
+ }
+
+@@ -133,18 +136,30 @@ arp_find(in_addr_t ip, struct ether_addr *mac)
+ static void
+ cleanup(int sig)
+ {
++ int fw = arp_find(spoof_ip, &spoof_mac);
++ int bw = poison_reverse && target_ip && arp_find(target_ip, &target_mac);
+ int i;
+-
+- if (arp_find(spoof_ip, &spoof_mac)) {
+- for (i = 0; i < 3; i++) {
+- /* XXX - on BSD, requires ETHERSPOOF kernel. */
++
++ fprintf(stderr, "Cleaning up and re-arping targets...\n");
++ for (i = 0; i < 5; i++) {
++ /* XXX - on BSD, requires ETHERSPOOF kernel. */
++ if (fw) {
+ arp_send(l, ARPOP_REPLY,
+ (u_int8_t *)&spoof_mac, spoof_ip,
+ (target_ip ? (u_int8_t *)&target_mac : NULL),
+ target_ip);
++ /* we have to wait a moment before sending the next packet */
++ sleep(1);
++ }
++ if (bw) {
++ arp_send(l, ARPOP_REPLY,
++ (u_int8_t *)&target_mac, target_ip,
++ (u_int8_t *)&spoof_mac,
++ spoof_ip);
+ sleep(1);
+ }
+ }
++
+ exit(0);
+ }
+
+@@ -156,11 +171,12 @@ main(int argc, char *argv[])
+ char pcap_ebuf[PCAP_ERRBUF_SIZE];
+ char libnet_ebuf[LIBNET_ERRBUF_SIZE];
+ int c;
+-
++
+ intf = NULL;
+ spoof_ip = target_ip = 0;
+-
+- while ((c = getopt(argc, argv, "i:t:h?V")) != -1) {
++ poison_reverse = 0;
++
++ while ((c = getopt(argc, argv, "ri:t:h?V")) != -1) {
+ switch (c) {
+ case 'i':
+ intf = optarg;
+@@ -169,6 +185,9 @@ main(int argc, char *argv[])
+ if ((target_ip = libnet_name2addr4(l, optarg, LIBNET_RESOLVE)) == -1)
+ usage();
+ break;
++ case 'r':
++ poison_reverse = 1;
++ break;
+ default:
+ usage();
+ }
+@@ -178,7 +197,12 @@ main(int argc, char *argv[])
+
+ if (argc != 1)
+ usage();
+-
++
++ if (poison_reverse && !target_ip) {
++ errx(1, "Spoofing the reverse path (-r) is only available when specifying a target (-t).");
++ usage();
++ }
++
+ if ((spoof_ip = libnet_name2addr4(l, argv[0], LIBNET_RESOLVE)) == -1)
+ usage();
+
+@@ -191,18 +215,29 @@ main(int argc, char *argv[])
+ if (target_ip != 0 && !arp_find(target_ip, &target_mac))
+ errx(1, "couldn't arp for host %s",
+ libnet_addr2name4(target_ip, LIBNET_DONT_RESOLVE));
+-
++
++ if (poison_reverse) {
++ if (!arp_find(spoof_ip, &spoof_mac)) {
++ errx(1, "couldn't arp for spoof host %s",
++ libnet_addr2name4(spoof_ip, LIBNET_DONT_RESOLVE));
++ }
++ }
++
+ signal(SIGHUP, cleanup);
+ signal(SIGINT, cleanup);
+ signal(SIGTERM, cleanup);
+-
++
+ for (;;) {
+ arp_send(l, ARPOP_REPLY, NULL, spoof_ip,
+ (target_ip ? (u_int8_t *)&target_mac : NULL),
+ target_ip);
++ if (poison_reverse) {
++ arp_send(l, ARPOP_REPLY, NULL, target_ip, (uint8_t *)&spoof_mac, spoof_ip);
++ }
++
+ sleep(2);
+ }
+ /* NOTREACHED */
+-
++
+ exit(0);
+ }
+--
+1.7.5.4
+