1 /* $OpenBSD: interface.h,v 1.87 2023/02/28 10:04:50 claudio Exp $ */ 2 3 /* 4 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 * 23 * @(#) $Id: interface.h,v 1.87 2023/02/28 10:04:50 claudio Exp $ (LBL) 24 */ 25 26 #ifndef tcpdump_interface_h 27 #define tcpdump_interface_h 28 29 #ifdef HAVE_OS_PROTO_H 30 #include "os-proto.h" 31 #endif 32 33 struct tok { 34 int v; /* value */ 35 char *s; /* string */ 36 }; 37 38 extern int aflag; /* translate network and broadcast addresses */ 39 extern int dflag; /* print filter code */ 40 extern int eflag; /* print ethernet header */ 41 extern int fflag; /* don't translate "foreign" IP address */ 42 extern int Iflag; /* include interface in output */ 43 extern int nflag; /* leave addresses as numbers */ 44 extern int Nflag; /* remove domains from printed host names */ 45 extern int oflag; /* OS fingerprint */ 46 extern int qflag; /* quick (shorter) output */ 47 extern int Sflag; /* print raw TCP sequence numbers */ 48 extern int tflag; /* print packet arrival time */ 49 extern int vflag; /* verbose */ 50 extern int xflag; /* print packet in hex */ 51 extern int Xflag; /* print packet in hex/ascii */ 52 53 extern int packettype; /* as specified by -T */ 54 extern char *device; /* as specified by -i */ 55 #define PT_VAT 1 /* Visual Audio Tool */ 56 #define PT_WB 2 /* distributed White Board */ 57 #define PT_RPC 3 /* Remote Procedure Call */ 58 #define PT_RTP 4 /* Real-Time Applications protocol */ 59 #define PT_RTCP 5 /* Real-Time Applications control protocol */ 60 #define PT_CNFP 6 /* Cisco NetFlow protocol */ 61 #define PT_VRRP 7 /* Virtual Router Redundancy protocol */ 62 #define PT_TCP 8 /* TCP */ 63 #define PT_GRE 9 /* Generic Routing Encapsulation (over UDP) */ 64 #define PT_MPLS 10 /* MPLS (over UDP) */ 65 #define PT_TFTP 11 /* Trivial File Transfer Protocol */ 66 #define PT_VXLAN 12 /* Virtual eXtensible Local Area Network */ 67 #define PT_ERSPAN 13 /* GRE ERSPAN Type I or II */ 68 #define PT_WIREGUARD 14 /* WireGuard tunnel */ 69 #define PT_GENEVE 15 /* Geneve */ 70 71 #ifndef min 72 #define min(a,b) ((a)>(b)?(b):(a)) 73 #endif 74 #ifndef max 75 #define max(a,b) ((b)>(a)?(b):(a)) 76 #endif 77 78 /* 79 * The default snapshot length. This value allows most printers to print 80 * useful information while keeping the amount of unwanted data down. 81 * In particular, it allows ethernet, tcp/ip headers, and a small amount 82 * of data, or to capture IPv6 and TCP headers after pflog encapsulation. 83 */ 84 #define DEFAULT_SNAPLEN 116 85 #define IEEE802_11_SNAPLEN (DEFAULT_SNAPLEN + 30) 86 #define IEEE802_11_RADIO_SNAPLEN (IEEE802_11_SNAPLEN + 64) 87 88 #ifndef BIG_ENDIAN 89 #define BIG_ENDIAN 4321 90 #define LITTLE_ENDIAN 1234 91 #endif 92 93 #ifdef ETHER_HEADER_HAS_EA 94 #define ESRC(ep) ((ep)->ether_shost.ether_addr_octet) 95 #define EDST(ep) ((ep)->ether_dhost.ether_addr_octet) 96 #else 97 #define ESRC(ep) ((ep)->ether_shost) 98 #define EDST(ep) ((ep)->ether_dhost) 99 #endif 100 101 #ifdef ETHER_ARP_HAS_X 102 #define SHA(ap) ((ap)->arp_xsha) 103 #define THA(ap) ((ap)->arp_xtha) 104 #define SPA(ap) ((ap)->arp_xspa) 105 #define TPA(ap) ((ap)->arp_xtpa) 106 #else 107 #ifdef ETHER_ARP_HAS_EA 108 #define SHA(ap) ((ap)->arp_sha.ether_addr_octet) 109 #define THA(ap) ((ap)->arp_tha.ether_addr_octet) 110 #else 111 #define SHA(ap) ((ap)->arp_sha) 112 #define THA(ap) ((ap)->arp_tha) 113 #endif 114 #define SPA(ap) ((ap)->arp_spa) 115 #define TPA(ap) ((ap)->arp_tpa) 116 #endif 117 118 #ifndef NTOHL 119 #define NTOHL(x) (x) = ntohl(x) 120 #define NTOHS(x) (x) = ntohs(x) 121 #define HTONL(x) (x) = htonl(x) 122 #define HTONS(x) (x) = htons(x) 123 #endif 124 #endif 125 126 extern char *program_name; /* used to generate self-identifying messages */ 127 128 extern int32_t thiszone; /* seconds offset from gmt to local time */ 129 130 extern int snaplen; 131 /* global pointers to beginning and end of current packet (during printing) */ 132 extern const u_char *packetp; 133 extern const u_char *snapend; 134 135 /* 136 * True if "l" bytes of "var" were captured. 137 * 138 * The "snapend - (l) <= snapend" checks to make sure "l" isn't so large 139 * that "snapend - (l)" underflows. 140 * 141 * The check is for <= rather than < because "l" might be 0. 142 */ 143 #define TTEST2(var, l) (snapend - (l) <= snapend && \ 144 (const u_char *)&(var) <= snapend - (l)) 145 146 /* True if "var" was captured */ 147 #define TTEST(var) TTEST2(var, sizeof(var)) 148 149 /* Bail if "l" bytes of "var" were not captured */ 150 #define TCHECK2(var, l) if (!TTEST2(var, l)) goto trunc 151 152 /* Bail if "var" was not captured */ 153 #define TCHECK(var) TCHECK2(var, sizeof(var)) 154 155 struct timeval; 156 struct bpf_timeval; 157 158 extern void ts_print(const struct bpf_timeval *); 159 160 extern int fn_print(const u_char *, const u_char *); 161 extern int fn_printn(const u_char *, u_int, const u_char *); 162 extern void relts_print(int); 163 extern const char *tok2str(const struct tok *, const char *, int); 164 extern char *dnaddr_string(u_short); 165 extern void safeputs(const char *); 166 extern void safeputchar(int); 167 extern void printb(char *, unsigned short, char *); 168 169 extern void wrapup(int); 170 171 extern __dead void error(const char *, ...) 172 __attribute__((__format__ (printf, 1, 2))); 173 extern void warning(const char *, ...) 174 __attribute__ ((__format__ (printf, 1, 2))); 175 176 extern char *read_infile(char *); 177 extern char *copy_argv(char * const *); 178 179 extern char *isonsap_string(const u_char *); 180 extern char *llcsap_string(u_char); 181 extern char *protoid_string(const u_char *); 182 extern char *dnname_string(u_short); 183 extern char *dnnum_string(u_short); 184 185 /* The printer routines. */ 186 187 struct pcap_pkthdr; 188 189 extern int ether_encap_print(u_short, const u_char *, u_int, u_int); 190 extern int llc_print(const u_char *, u_int, u_int, const u_char *, 191 const u_char *); 192 extern int pppoe_if_print(u_short, const u_char *, u_int, u_int); 193 extern void aarp_print(const u_char *, u_int); 194 extern void arp_print(const u_char *, u_int, u_int); 195 extern void atalk_print(const u_char *, u_int); 196 extern void atalk_print_llap(const u_char *, u_int); 197 extern void atm_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 198 extern void bootp_print(const u_char *, u_int, u_short, u_short); 199 extern void bgp_print(const u_char *, int); 200 extern void decnet_print(const u_char *, u_int, u_int); 201 extern void default_print(const u_char *, u_int); 202 extern void dvmrp_print(const u_char *, u_int); 203 extern void egp_print(const u_char *, u_int, const u_char *); 204 extern void enc_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 205 extern void pflog_if_print(u_char *, const struct pcap_pkthdr *, 206 const u_char *); 207 extern void pflog_old_if_print(u_char *, const struct pcap_pkthdr *, 208 const u_char *); 209 extern void pfsync_if_print(u_char *, const struct pcap_pkthdr *, 210 const u_char *); 211 extern void pfsync_ip_print(const u_char *, u_int, const u_char *); 212 extern void ether_if_print(u_char *, const struct pcap_pkthdr *, 213 const u_char *); 214 extern void ether_tryprint(const u_char *, u_int, int); 215 extern void fddi_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 216 extern void ppp_ether_if_print(u_char *, const struct pcap_pkthdr *, 217 const u_char *); 218 extern void gre_print(const u_char *, u_int); 219 extern void vxlan_print(const u_char *, u_int); 220 extern void geneve_print(const u_char *, u_int); 221 extern void nsh_print(const u_char *, u_int); 222 extern void nhrp_print(const u_char *, u_int); 223 extern void icmp_print(const u_char *, u_int, const u_char *); 224 extern void ieee802_11_if_print(u_char *, const struct pcap_pkthdr *, 225 const u_char *); 226 extern void ieee802_11_radio_if_print(u_char *, const struct pcap_pkthdr *, 227 const u_char *); 228 extern void iapp_print(const u_char *, u_int); 229 extern void igrp_print(const u_char *, u_int, const u_char *); 230 extern void ip_print(const u_char *, u_int); 231 extern void ipx_print(const u_char *, u_int); 232 extern void isoclns_print(const u_char *, u_int, u_int, const u_char *, 233 const u_char *); 234 extern void krb_print(const u_char *, u_int); 235 extern void netbeui_print(u_short, const u_char *, const u_char *); 236 extern void ipx_netbios_print(const u_char *, const u_char *); 237 extern void nbt_tcp_print(const u_char *, int); 238 extern void nbt_udp137_print(const u_char *data, int); 239 extern void nbt_udp138_print(const u_char *data, int); 240 extern char *smb_errstr(int, int); 241 extern void print_data(const unsigned char *, int); 242 extern void l2tp_print(const u_char *dat, u_int length); 243 extern void vrrp_print(const u_char *bp, u_int len, int ttl); 244 extern void carp_print(const u_char *bp, u_int len, int ttl); 245 extern void hsrp_print(const u_char *, u_int); 246 extern void vqp_print(const u_char *, u_int); 247 extern void nfsreply_print(const u_char *, u_int, const u_char *); 248 extern void nfsreq_print(const u_char *, u_int, const u_char *); 249 extern void ns_print(const u_char *, u_int, int); 250 extern void ntp_print(const u_char *, u_int); 251 extern void loop_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 252 extern void null_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 253 extern void ospf_print(const u_char *, u_int, const u_char *); 254 extern void mobile_print(const u_char *, u_int); 255 extern void pim_print(const u_char *, u_int); 256 extern void ppp_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 257 extern void ppp_hdlc_if_print(u_char *, const struct pcap_pkthdr *, 258 const u_char *); 259 extern void ppp_print(const u_char *, u_int); 260 extern void ppp_hdlc_print(const u_char *, u_int); 261 extern void raw_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 262 extern void rip_print(const u_char *, u_int); 263 extern void sl_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 264 extern void sl_bsdos_if_print(u_char *, const struct pcap_pkthdr *, 265 const u_char *); 266 extern void snmp_print(const u_char *, u_int); 267 extern void sunrpcrequest_print(const u_char *, u_int, const u_char *); 268 extern void cnfp_print(const u_char *, u_int); 269 extern void tcp_print(const u_char *, u_int, const u_char *); 270 extern void tftp_print(const u_char *, u_int); 271 extern void wg_print(const u_char *, u_int); 272 extern void timed_print(const u_char *, u_int); 273 extern void udp_print(const u_char *, u_int, const void *); 274 extern void wb_print(const void *, u_int); 275 extern void ike_print(const u_char *, u_int); 276 extern void udpencap_print(const u_char *, u_int, const u_char *); 277 extern void ah_print(const u_char *, u_int, const u_char *); 278 extern void esp_print(const u_char *, u_int, const u_char *); 279 extern void cdp_print(const u_char *, u_int, u_int, int); 280 extern void stp_print(const u_char *, u_int); 281 extern void radius_print(const u_char *, u_int); 282 extern void lwres_print(const u_char *, u_int); 283 extern void ether_print(const u_char *, u_int); 284 extern void etherip_print(const u_char *, u_int, u_int); 285 extern void ipcomp_print(const u_char *, u_int, const u_char *); 286 extern void mpls_print(const u_char *, u_int); 287 extern void lldp_print(const u_char *, u_int); 288 extern void slow_print(const u_char *, u_int); 289 extern void gtp_print(const u_char *, u_int, u_short, u_short); 290 extern void ofp_print(const u_char *, u_int); 291 extern void ofp_if_print(u_char *, const struct pcap_pkthdr *, const u_char *); 292 extern void usbpcap_if_print(u_char *, const struct pcap_pkthdr *, 293 const u_char *); 294 295 extern void ip6_print(const u_char *, u_int); 296 extern void ip6_opt_print(const u_char *, int); 297 extern int hbhopt_print(const u_char *); 298 extern int dstopt_print(const u_char *); 299 extern int frag6_print(const u_char *, const u_char *); 300 extern void icmp6_print(const u_char *, u_int, const u_char *); 301 extern void ripng_print(const u_char *, int); 302 extern int rt6_print(const u_char *, const u_char *); 303 extern void ospf6_print(const u_char *, u_int); 304 extern void dhcp6_print(const u_char *, u_int); 305 306 extern uint32_t in_cksum_add(const void *, size_t, uint32_t); 307 extern uint16_t in_cksum_fini(uint32_t); 308 extern uint16_t in_cksum(const void *, size_t, uint32_t); 309 extern u_int16_t in_cksum_shouldbe(u_int16_t, u_int16_t); 310 311 extern uint32_t wg_match(const u_char *, u_int); 312