1 #ifndef TINC_IPV4_H 2 #define TINC_IPV4_H 3 4 /* 5 ipv4.h -- missing IPv4 related definitions 6 Copyright (C) 2005 Ivo Timmermans 7 2006-2012 Guus Sliepen <guus@tinc-vpn.org> 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License along 20 with this program; if not, write to the Free Software Foundation, Inc., 21 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 22 */ 23 24 #ifndef AF_INET 25 #define AF_INET 2 26 #endif 27 28 #ifndef IPPROTO_ICMP 29 #define IPPROTO_ICMP 1 30 #endif 31 32 #ifndef ICMP_DEST_UNREACH 33 #define ICMP_DEST_UNREACH 3 34 #endif 35 36 #ifndef ICMP_FRAG_NEEDED 37 #define ICMP_FRAG_NEEDED 4 38 #endif 39 40 #ifndef ICMP_NET_UNKNOWN 41 #define ICMP_NET_UNKNOWN 6 42 #endif 43 44 #ifndef ICMP_TIME_EXCEEDED 45 #define ICMP_TIME_EXCEEDED 11 46 #endif 47 48 #ifndef ICMP_EXC_TTL 49 #define ICMP_EXC_TTL 0 50 #endif 51 52 #ifndef ICMP_NET_UNREACH 53 #define ICMP_NET_UNREACH 0 54 #endif 55 56 #ifndef ICMP_NET_ANO 57 #define ICMP_NET_ANO 9 58 #endif 59 60 #ifndef IP_MSS 61 #define IP_MSS 576 62 #endif 63 64 #ifndef HAVE_STRUCT_IP 65 struct ip { 66 #if __BYTE_ORDER == __LITTLE_ENDIAN 67 unsigned int ip_hl: 4; 68 unsigned int ip_v: 4; 69 #else 70 unsigned int ip_v: 4; 71 unsigned int ip_hl: 4; 72 #endif 73 uint8_t ip_tos; 74 uint16_t ip_len; 75 uint16_t ip_id; 76 uint16_t ip_off; 77 #define IP_RF 0x8000 78 #define IP_DF 0x4000 79 #define IP_MF 0x2000 80 uint8_t ip_ttl; 81 uint8_t ip_p; 82 uint16_t ip_sum; 83 struct in_addr ip_src, ip_dst; 84 } __attribute__((__gcc_struct__)) __attribute((__packed__)); 85 #endif 86 87 #ifndef IP_OFFMASK 88 #define IP_OFFMASK 0x1fff 89 #endif 90 91 #ifndef HAVE_STRUCT_ICMP 92 struct icmp { 93 uint8_t icmp_type; 94 uint8_t icmp_code; 95 uint16_t icmp_cksum; 96 union { 97 uint8_t ih_pptr; 98 struct in_addr ih_gwaddr; 99 struct ih_idseq { 100 uint16_t icd_id; 101 uint16_t icd_seq; 102 } ih_idseq; 103 uint32_t ih_void; 104 105 106 struct ih_pmtu { 107 uint16_t ipm_void; 108 uint16_t ipm_nextmtu; 109 } ih_pmtu; 110 111 struct ih_rtradv { 112 uint8_t irt_num_addrs; 113 uint8_t irt_wpa; 114 uint16_t irt_lifetime; 115 } ih_rtradv; 116 } icmp_hun; 117 #define icmp_pptr icmp_hun.ih_pptr 118 #define icmp_gwaddr icmp_hun.ih_gwaddr 119 #define icmp_id icmp_hun.ih_idseq.icd_id 120 #define icmp_seq icmp_hun.ih_idseq.icd_seq 121 #define icmp_void icmp_hun.ih_void 122 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void 123 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu 124 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs 125 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa 126 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime 127 union { 128 struct { 129 uint32_t its_otime; 130 uint32_t its_rtime; 131 uint32_t its_ttime; 132 } id_ts; 133 struct { 134 struct ip idi_ip; 135 } id_ip; 136 uint32_t id_mask; 137 uint8_t id_data[1]; 138 } icmp_dun; 139 #define icmp_otime icmp_dun.id_ts.its_otime 140 #define icmp_rtime icmp_dun.id_ts.its_rtime 141 #define icmp_ttime icmp_dun.id_ts.its_ttime 142 #define icmp_ip icmp_dun.id_ip.idi_ip 143 #define icmp_radv icmp_dun.id_radv 144 #define icmp_mask icmp_dun.id_mask 145 #define icmp_data icmp_dun.id_data 146 } __attribute__((__gcc_struct__)) __attribute((__packed__)); 147 #endif 148 149 #endif 150