static unsigned int
mroute_extract_addr_arp (struct mroute_addr *src,
struct mroute_addr *dest,
const struct buffer *buf)
{
unsigned int ret = 0;
if (BLEN (buf) >= (int) sizeof (struct openvpn_arp))
{
const struct openvpn_arp *arp = (const struct openvpn_arp *) BPTR (buf);
if (arp->mac_addr_type == htons(0x0001)
&& arp->proto_addr_type == htons(0x0800)
&& arp->mac_addr_size == 0x06
&& arp->proto_addr_size == 0x04)
{
mroute_get_in_addr_t (src, arp->ip_src, MR_ARP);
mroute_get_in_addr_t (dest, arp->ip_dest, MR_ARP);
/* multicast packet? */
if (mroute_is_mcast (arp->ip_dest))
ret |= MROUTE_EXTRACT_MCAST;
ret |= MROUTE_EXTRACT_SUCCEEDED;
}
}
return ret;
}
unsigned int
mroute_extract_addr_ipv4 (struct mroute_addr *src,
struct mroute_addr *dest,
const struct buffer *buf)
{
unsigned int ret = 0;
if (BLEN (buf) >= 1)
{
switch (OPENVPN_IPH_GET_VER (*BPTR(buf)))
{
case 4:
if (BLEN (buf) >= (int) sizeof (struct openvpn_iphdr))
{
const struct openvpn_iphdr *ip = (const struct openvpn_iphdr *) BPTR (buf);
mroute_get_in_addr_t (src, ip->saddr, 0);
mroute_get_in_addr_t (dest, ip->daddr, 0);
/* multicast packet? */
if (mroute_is_mcast (ip->daddr))
ret |= MROUTE_EXTRACT_MCAST;
/* IGMP message? */
if (ip->protocol == OPENVPN_IPPROTO_IGMP)
ret |= MROUTE_EXTRACT_IGMP;
ret |= MROUTE_EXTRACT_SUCCEEDED;
}
break;
case 6:
if (BLEN (buf) >= (int) sizeof (struct openvpn_ipv6hdr))
{
const struct openvpn_ipv6hdr *ipv6 = (const struct openvpn_ipv6hdr *) BPTR (buf);
#if 0 /* very basic debug */
struct gc_arena gc = gc_new ();
msg( M_INFO, "IPv6 packet! src=%s, dst=%s",
print_in6_addr( ipv6->saddr, 0, &gc ),
print_in6_addr( ipv6->daddr, 0, &gc ));
gc_free (&gc);
#endif
mroute_get_in6_addr (src, ipv6->saddr, 0);
mroute_get_in6_addr (dest, ipv6->daddr, 0);
if (mroute_is_mcast_ipv6 (ipv6->daddr))
ret |= MROUTE_EXTRACT_MCAST;
ret |= MROUTE_EXTRACT_SUCCEEDED;
}
break;
default:
msg (M_WARN, "IP packet with unknown IP version=%d seen",
OPENVPN_IPH_GET_VER (*BPTR(buf)));
}
}
return ret;
}
unsigned int
mroute_extract_addr_ipv4 (struct mroute_addr *src,
struct mroute_addr *dest,
const struct buffer *buf)
{
unsigned int ret = 0;
static bool ipv6warned = false;
if (BLEN (buf) >= 1)
{
switch (OPENVPN_IPH_GET_VER (*BPTR(buf)))
{
case 4:
if (BLEN (buf) >= (int) sizeof (struct openvpn_iphdr))
{
const struct openvpn_iphdr *ip = (const struct openvpn_iphdr *) BPTR (buf);
mroute_get_in_addr_t (src, ip->saddr, 0);
mroute_get_in_addr_t (dest, ip->daddr, 0);
/* multicast packet? */
if (mroute_is_mcast (ip->daddr))
ret |= MROUTE_EXTRACT_MCAST;
/* IGMP message? */
if (ip->protocol == OPENVPN_IPPROTO_IGMP)
ret |= MROUTE_EXTRACT_IGMP;
ret |= MROUTE_EXTRACT_SUCCEEDED;
}
break;
case 6:
{
if( !ipv6warned ) {
msg (M_WARN, "IPv6 in tun mode is not supported in OpenVPN 2.2");
ipv6warned = true;
}
break;
}
}
}
return ret;
}
unsigned int
mroute_extract_addr_ipv4 (struct mroute_addr *src,
struct mroute_addr *dest,
const struct buffer *buf)
{
unsigned int ret = 0;
if (BLEN (buf) >= 1)
{
switch (OPENVPN_IPH_GET_VER (*BPTR(buf)))
{
case 4:
if (BLEN (buf) >= (int) sizeof (struct openvpn_iphdr))
{
const struct openvpn_iphdr *ip = (const struct openvpn_iphdr *) BPTR (buf);
mroute_get_in_addr_t (src, ip->saddr, 0);
mroute_get_in_addr_t (dest, ip->daddr, 0);
/* multicast packet? */
if (mroute_is_mcast (ip->daddr))
ret |= MROUTE_EXTRACT_MCAST;
/* IGMP message? */
if (ip->protocol == OPENVPN_IPPROTO_IGMP)
ret |= MROUTE_EXTRACT_IGMP;
ret |= MROUTE_EXTRACT_SUCCEEDED;
}
break;
case 6:
{
msg (M_WARN, "Need IPv6 code in mroute_extract_addr_from_packet");
break;
}
}
}
return ret;
}
