Hi there,
I run tinc with not ConnectTo, (and it can't tcp-connect to
the relevant other tincd, because that tincd is behind a
firewall --> that tincd usualy connects to my tincd).
If I start that tincd alone (not connected at all) and do a
ping some_other_ip, it gets a SIGBUS in route.c:207 in the
function route_ipv4_unreachable at the line:
hdr->ip_v = 4;
This seems to be an alignment problem.
I've appended a quick fix for this, which at least makes
tinc not crash any more.
Elrond
-------------- next part --------------
--- route.c~ Thu Jul 31 15:18:34 2003
+++ route.c Fri Oct 3 12:04:54 2003
@@ -174,7 +174,9 @@
static void route_ipv4_unreachable(vpn_packet_t *packet, uint8_t code)
{
- struct ip *hdr;
+ struct ip local_hdr;
+ struct ip *hdr = &local_hdr;
+ struct ip *phdr;
struct icmp *icmp;
struct in_addr ip_src;
@@ -186,7 +188,7 @@
cp();
- hdr = (struct ip *)(packet->data + 14);
+ phdr = (struct ip *)(packet->data + 14);
icmp = (struct icmp *)(packet->data + 14 + 20);
/* Remember original source and destination */
@@ -217,7 +219,9 @@
memcpy(&hdr->ip_dst, &ip_src, 4);
hdr->ip_sum = inet_checksum(hdr, 20, ~0);
-
+
+ memcpy(phdr, hdr, sizeof(*phdr));
+
/* Fill in ICMP header */
icmp->icmp_type = ICMP_DEST_UNREACH;
