diff options
Diffstat (limited to 'src/openvpn/proto.c')
| -rw-r--r-- | src/openvpn/proto.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/src/openvpn/proto.c b/src/openvpn/proto.c index 2cf8314..b437f1a 100644 --- a/src/openvpn/proto.c +++ b/src/openvpn/proto.c @@ -36,11 +36,12 @@ #include "memdbg.h" /* - * If raw tunnel packet is IPv4, return true and increment + * If raw tunnel packet is IPv<X>, return true and increment * buffer offset to start of IP header. */ +static bool -is_ipv4 (int tunnel_type, struct buffer *buf) +is_ipv_X ( int tunnel_type, struct buffer *buf, int ip_ver ) { int offset; const struct openvpn_iphdr *ih; @@ -68,12 +69,24 @@ is_ipv4 (int tunnel_type, struct buffer *buf) ih = (const struct openvpn_iphdr *) (BPTR (buf) + offset); - if (OPENVPN_IPH_GET_VER (ih->version_len) == 4) + /* IP version is stored in the same bits for IPv4 or IPv6 header */ + if (OPENVPN_IPH_GET_VER (ih->version_len) == ip_ver) return buf_advance (buf, offset); else return false; } +bool +is_ipv4 (int tunnel_type, struct buffer *buf) +{ + return is_ipv_X( tunnel_type, buf, 4 ); +} +bool +is_ipv6 (int tunnel_type, struct buffer *buf) +{ + return is_ipv_X( tunnel_type, buf, 6 ); +} + #ifdef PACKET_TRUNCATION_CHECK void |