From 30321208dbccbd634c5e91b594372d150df07a03 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20Hor=C3=A1k?= <dan@danny.cz>
Date: Tue, 25 Jan 2011 10:38:42 +0100
Subject: [PATCH 44/46] xcec-bridge: fix multicast forwarding
Description: xcec-bridge: fix multicast forwarding
Symptom: Forwarding of multicast traffic does not work.
Problem: xcec-bridge was developed for the broken packet socket
support of the qeth layer 3 driver. The code assumes
there are no link level heades for incoming packets.
Solution: New qeth layer 3 driver has full packet socket support
so xcec-bridge has to account link level header.
---
ip_watcher/xcec-bridge.c | 9 +++++----
1 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/ip_watcher/xcec-bridge.c b/ip_watcher/xcec-bridge.c
index d6dd112..7f551d2 100644
--- a/ip_watcher/xcec-bridge.c
+++ b/ip_watcher/xcec-bridge.c
@@ -549,12 +549,13 @@ void process_packet(struct int_sock *i_s)
if (s_ll.sll_pkttype==PACKET_BROADCAST) {
s_in.sin_addr.s_addr=INADDR_BROADCAST;
} else {
- memcpy(&s_in.sin_addr,&buffer[16],4);
+ memcpy(&s_in.sin_addr, &buffer[16 + ETH_HLEN], 4);
}
- retval=sendto(i_s_item->o_fd,buffer,buffer_len,0,
- (struct sockaddr *)&s_in,
- sizeof(struct sockaddr_in));
+ retval=sendto(i_s_item->o_fd, buffer + ETH_HLEN,
+ buffer_len - ETH_HLEN, 0,
+ (struct sockaddr *)&s_in,
+ sizeof(struct sockaddr_in));
if (retval==-1) {
if ( (errno==EMSGSIZE) && (!i_s_item->mtu_warning) ) {
syslog(LOG_WARNING,"MTU of %s too small " \
--
1.7.3.4