The Tcpdump Group git mirrors - tcpdump/blob - interface.h

   1 /*
   2  * Copyright (c) 1988-2002
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifndef tcpdump_interface_h
  23 #define tcpdump_interface_h
  24
  25 #ifdef HAVE_OS_PROTO_H
  26 #include "os-proto.h"
  27 #endif
  28
  29 /* snprintf et al */
  30
  31 #include <stdarg.h>
  32
  33 #if HAVE_STDINT_H
  34 #include <stdint.h>
  35 #endif
  36
  37 #if !defined(HAVE_SNPRINTF)
  38 int snprintf(char *, size_t, const char *, ...)
  39 #ifdef __ATTRIBUTE___FORMAT_OK
  40      __attribute__((format(printf, 3, 4)))
  41 #endif /* __ATTRIBUTE___FORMAT_OK */
  42      ;
  43 #endif /* !defined(HAVE_SNPRINTF) */
  44
  45 #if !defined(HAVE_VSNPRINTF)
  46 int vsnprintf(char *, size_t, const char *, va_list)
  47 #ifdef __ATTRIBUTE___FORMAT_OK
  48      __attribute__((format(printf, 3, 0)))
  49 #endif /* __ATTRIBUTE___FORMAT_OK */
  50      ;
  51 #endif /* !defined(HAVE_VSNPRINTF) */
  52
  53 #ifndef HAVE_STRLCAT
  54 extern size_t strlcat(char *, const char *, size_t);
  55 #endif
  56 #ifndef HAVE_STRLCPY
  57 extern size_t strlcpy(char *, const char *, size_t);
  58 #endif
  59
  60 #ifndef HAVE_STRDUP
  61 extern char *strdup(const char *);
  62 #endif
  63
  64 #ifndef HAVE_STRSEP
  65 extern char *strsep(char **, const char *);
  66 #endif
  67
  68 #define PT_VAT          1       /* Visual Audio Tool */
  69 #define PT_WB           2       /* distributed White Board */
  70 #define PT_RPC          3       /* Remote Procedure Call */
  71 #define PT_RTP          4       /* Real-Time Applications protocol */
  72 #define PT_RTCP         5       /* Real-Time Applications control protocol */
  73 #define PT_SNMP         6       /* Simple Network Management Protocol */
  74 #define PT_CNFP         7       /* Cisco NetFlow protocol */
  75 #define PT_TFTP         8       /* trivial file transfer protocol */
  76 #define PT_AODV         9       /* Ad-hoc On-demand Distance Vector Protocol */
  77 #define PT_CARP         10      /* Common Address Redundancy Protocol */
  78 #define PT_RADIUS       11      /* RADIUS authentication Protocol */
  79 #define PT_ZMTP1        12      /* ZeroMQ Message Transport Protocol 1.0 */
  80 #define PT_VXLAN        13      /* Virtual eXtensible Local Area Network */
  81 #define PT_PGM          14      /* [UDP-encapsulated] Pragmatic General Multicast */
  82 #define PT_PGM_ZMTP1    15      /* ZMTP/1.0 inside PGM (native or UDP-encapsulated) */
  83 #define PT_LMP          16      /* Link Management Protocol */
  84
  85 #define ESRC(ep) ((ep)->ether_shost)
  86 #define EDST(ep) ((ep)->ether_dhost)
  87
  88 #ifndef NTOHL
  89 #define NTOHL(x)        (x) = ntohl(x)
  90 #define NTOHS(x)        (x) = ntohs(x)
  91 #define HTONL(x)        (x) = htonl(x)
  92 #define HTONS(x)        (x) = htons(x)
  93 #endif
  94 #endif
  95
  96 extern char *program_name;      /* used to generate self-identifying messages */
  97
  98 extern int32_t thiszone;        /* seconds offset from gmt to local time */
  99
 100 /*
 101  * True if  "l" bytes of "var" were captured.
 102  *
 103  * The "snapend - (l) <= snapend" checks to make sure "l" isn't so large
 104  * that "snapend - (l)" underflows.
 105  *
 106  * The check is for <= rather than < because "l" might be 0.
 107  */
 108 #define TTEST2(var, l) (snapend - (l) <= snapend && \
 109                         (const u_char *)&(var) <= snapend - (l))
 110
 111 /* True if "var" was captured */
 112 #define TTEST(var) TTEST2(var, sizeof(var))
 113
 114 /* Bail if "l" bytes of "var" were not captured */
 115 #define TCHECK2(var, l) if (!TTEST2(var, l)) goto trunc
 116
 117 /* Bail if "var" was not captured */
 118 #define TCHECK(var) TCHECK2(var, sizeof(var))
 119
 120 extern int mask2plen(u_int32_t);
 121 extern const char *tok2strary_internal(const char **, int, const char *, int);
 122 #define tok2strary(a,f,i) tok2strary_internal(a, sizeof(a)/sizeof(a[0]),f,i)
 123
 124 extern void error(const char *, ...)
 125      __attribute__((noreturn))
 126 #ifdef __ATTRIBUTE___FORMAT_OK
 127      __attribute__((format (printf, 1, 2)))
 128 #endif /* __ATTRIBUTE___FORMAT_OK */
 129      ;
 130 extern void warning(const char *, ...)
 131 #ifdef __ATTRIBUTE___FORMAT_OK
 132      __attribute__((format (printf, 1, 2)))
 133 #endif /* __ATTRIBUTE___FORMAT_OK */
 134      ;
 135
 136 extern char *read_infile(char *);
 137 extern char *copy_argv(char **);
 138
 139 extern const char *dnname_string(u_short);
 140 extern const char *dnnum_string(u_short);
 141
 142 /* checksum routines */
 143 extern void init_checksum(void);
 144 extern u_int16_t verify_crc10_cksum(u_int16_t, const u_char *, int);
 145 extern u_int16_t create_osi_cksum(const u_int8_t *, int, int);
 146
 147 /* The printer routines. */
 148
 149 #include <pcap.h>
 150
 151 extern char *q922_string(const u_char *);
 152 extern char *smb_errstr(int, int);
 153 extern const char *nt_errstr(u_int32_t);
 154 extern void print_m3ua(const u_char *, u_int);
 155
 156 #ifdef INET6
 157 extern int mask62plen(const u_char *);
 158 #endif /*INET6*/
 159
 160 struct cksum_vec {
 161         const u_int8_t  *ptr;
 162         int             len;
 163 };
 164 extern u_int16_t in_cksum(const struct cksum_vec *, int);
 165 extern u_int16_t in_cksum_shouldbe(u_int16_t, u_int16_t);
 166
 167 #ifndef HAVE_BPF_DUMP
 168 struct bpf_program;
 169
 170 extern void bpf_dump(const struct bpf_program *, int);
 171
 172 #endif
 173
 174 #include "netdissect.h"
 175
 176 /* forward compatibility */
 177
 178 #ifndef NETDISSECT_REWORKED
 179 extern netdissect_options *gndo;
 180
 181 #define bflag gndo->ndo_bflag
 182 #define eflag gndo->ndo_eflag
 183 #define fflag gndo->ndo_fflag
 184 #define jflag gndo->ndo_jflag
 185 #define Kflag gndo->ndo_Kflag
 186 #define nflag gndo->ndo_nflag
 187 #define Nflag gndo->ndo_Nflag
 188 #define Oflag gndo->ndo_Oflag
 189 #define pflag gndo->ndo_pflag
 190 #define qflag gndo->ndo_qflag
 191 #define Rflag gndo->ndo_Rflag
 192 #define sflag gndo->ndo_sflag
 193 #define Sflag gndo->ndo_Sflag
 194 #define tflag gndo->ndo_tflag
 195 #define Uflag gndo->ndo_Uflag
 196 #define uflag gndo->ndo_uflag
 197 #define vflag gndo->ndo_vflag
 198 #define xflag gndo->ndo_xflag
 199 #define Xflag gndo->ndo_Xflag
 200 #define Cflag gndo->ndo_Cflag
 201 #define Gflag gndo->ndo_Gflag
 202 #define Aflag gndo->ndo_Aflag
 203 #define Bflag gndo->ndo_Bflag
 204 #define Iflag gndo->ndo_Iflag
 205 #define suppress_default_print gndo->ndo_suppress_default_print
 206 #define packettype gndo->ndo_packettype
 207 #define sigsecret gndo->ndo_sigsecret
 208 #define Wflag gndo->ndo_Wflag
 209 #define WflagChars gndo->ndo_WflagChars
 210 #define Cflag_count gndo->ndo_Cflag_count
 211 #define Gflag_count gndo->ndo_Gflag_count
 212 #define Gflag_time gndo->ndo_Gflag_time
 213 #define Hflag gndo->ndo_Hflag
 214 #define snaplen     gndo->ndo_snaplen
 215 #define snapend     gndo->ndo_snapend
 216
 217 extern void default_print(const u_char *, u_int);
 218
 219 #endif