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- /*
- ipv4.h -- missing IPv4 related definitions
- Copyright (C) 2005 Ivo Timmermans
- 2006-2012 Guus Sliepen <guus@tinc-vpn.org>
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
- #ifndef __TINC_IPV4_H__
- #define __TINC_IPV4_H__
- #ifndef AF_INET
- #define AF_INET 2
- #endif
- #ifndef IPPROTO_ICMP
- #define IPPROTO_ICMP 1
- #endif
- #ifndef ICMP_DEST_UNREACH
- #define ICMP_DEST_UNREACH 3
- #endif
- #ifndef ICMP_FRAG_NEEDED
- #define ICMP_FRAG_NEEDED 4
- #endif
- #ifndef ICMP_NET_UNKNOWN
- #define ICMP_NET_UNKNOWN 6
- #endif
- #ifndef ICMP_TIME_EXCEEDED
- #define ICMP_TIME_EXCEEDED 11
- #endif
- #ifndef ICMP_EXC_TTL
- #define ICMP_EXC_TTL 0
- #endif
- #ifndef ICMP_NET_UNREACH
- #define ICMP_NET_UNREACH 0
- #endif
- #ifndef ICMP_NET_ANO
- #define ICMP_NET_ANO 9
- #endif
- #ifndef IP_MSS
- #define IP_MSS 576
- #endif
- #ifndef HAVE_STRUCT_IP
- struct ip {
- #if __BYTE_ORDER == __LITTLE_ENDIAN
- unsigned int ip_hl:4;
- unsigned int ip_v:4;
- #else
- unsigned int ip_v:4;
- unsigned int ip_hl:4;
- #endif
- uint8_t ip_tos;
- uint16_t ip_len;
- uint16_t ip_id;
- uint16_t ip_off;
- #define IP_RF 0x8000
- #define IP_DF 0x4000
- #define IP_MF 0x2000
- uint8_t ip_ttl;
- uint8_t ip_p;
- uint16_t ip_sum;
- struct in_addr ip_src, ip_dst;
- } __attribute__ ((__packed__));
- #endif
- #ifndef IP_OFFMASK
- #define IP_OFFMASK 0x1fff
- #endif
- #ifndef HAVE_STRUCT_ICMP
- struct icmp {
- uint8_t icmp_type;
- uint8_t icmp_code;
- uint16_t icmp_cksum;
- union {
- uint8_t ih_pptr;
- struct in_addr ih_gwaddr;
- struct ih_idseq {
- uint16_t icd_id;
- uint16_t icd_seq;
- } ih_idseq;
- uint32_t ih_void;
- struct ih_pmtu {
- uint16_t ipm_void;
- uint16_t ipm_nextmtu;
- } ih_pmtu;
- struct ih_rtradv {
- uint8_t irt_num_addrs;
- uint8_t irt_wpa;
- uint16_t irt_lifetime;
- } ih_rtradv;
- } icmp_hun;
- #define icmp_pptr icmp_hun.ih_pptr
- #define icmp_gwaddr icmp_hun.ih_gwaddr
- #define icmp_id icmp_hun.ih_idseq.icd_id
- #define icmp_seq icmp_hun.ih_idseq.icd_seq
- #define icmp_void icmp_hun.ih_void
- #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
- #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
- #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
- #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
- #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
- union {
- struct {
- uint32_t its_otime;
- uint32_t its_rtime;
- uint32_t its_ttime;
- } id_ts;
- struct {
- struct ip idi_ip;
- } id_ip;
- uint32_t id_mask;
- uint8_t id_data[1];
- } icmp_dun;
- #define icmp_otime icmp_dun.id_ts.its_otime
- #define icmp_rtime icmp_dun.id_ts.its_rtime
- #define icmp_ttime icmp_dun.id_ts.its_ttime
- #define icmp_ip icmp_dun.id_ip.idi_ip
- #define icmp_radv icmp_dun.id_radv
- #define icmp_mask icmp_dun.id_mask
- #define icmp_data icmp_dun.id_data
- } __attribute__ ((__packed__));
- #endif
- #endif /* __TINC_IPV4_H__ */
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