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  * We cast the pointers to uintptr_t to make sure that the compiler
 109  * doesn't optimize away any of these tests (which it is allowed to
 110  * do, as adding an integer to, or subtracting an integer from, a
 111  * pointer assumes that the pointer is a pointer to an element of an
 112  * array and that the result of the addition or subtraction yields a
 113  * pointer to another member of the array, so that, for example, if
 114  * you subtract a positive integer from a pointer, the result is
 115  * guaranteed to be less than the original pointer value). See
 116  *
 117  *      http://www.kb.cert.org/vuls/id/162289
 118  */
 119 #define TTEST2(var, l) \
 120         ((uintptr_t)snapend - (l) <= (uintptr_t)snapend && \
 121            (uintptr_t)&(var) <= (uintptr_t)snapend - (l))
 122
 123 /* True if "var" was captured */
 124 #define TTEST(var) TTEST2(var, sizeof(var))
 125
 126 /* Bail if "l" bytes of "var" were not captured */
 127 #define TCHECK2(var, l) if (!TTEST2(var, l)) goto trunc
 128
 129 /* Bail if "var" was not captured */
 130 #define TCHECK(var) TCHECK2(var, sizeof(var))
 131
 132 extern int mask2plen(uint32_t);
 133 extern const char *tok2strary_internal(const char **, int, const char *, int);
 134 #define tok2strary(a,f,i) tok2strary_internal(a, sizeof(a)/sizeof(a[0]),f,i)
 135
 136 extern void error(const char *, ...)
 137      __attribute__((noreturn))
 138 #ifdef __ATTRIBUTE___FORMAT_OK
 139      __attribute__((format (printf, 1, 2)))
 140 #endif /* __ATTRIBUTE___FORMAT_OK */
 141      ;
 142 extern void warning(const char *, ...)
 143 #ifdef __ATTRIBUTE___FORMAT_OK
 144      __attribute__((format (printf, 1, 2)))
 145 #endif /* __ATTRIBUTE___FORMAT_OK */
 146      ;
 147
 148 extern char *read_infile(char *);
 149 extern char *copy_argv(char **);
 150
 151 extern const char *dnname_string(u_short);
 152 extern const char *dnnum_string(u_short);
 153
 154 /* checksum routines */
 155 extern void init_checksum(void);
 156 extern uint16_t verify_crc10_cksum(uint16_t, const u_char *, int);
 157 extern uint16_t create_osi_cksum(const uint8_t *, int, int);
 158
 159 /* The printer routines. */
 160
 161 #include <pcap.h>
 162
 163 extern char *smb_errstr(int, int);
 164 extern const char *nt_errstr(uint32_t);
 165
 166 #ifdef INET6
 167 extern int mask62plen(const u_char *);
 168 #endif /*INET6*/
 169
 170 struct cksum_vec {
 171         const uint8_t   *ptr;
 172         int             len;
 173 };
 174 extern uint16_t in_cksum(const struct cksum_vec *, int);
 175 extern uint16_t in_cksum_shouldbe(uint16_t, uint16_t);
 176
 177 #ifndef HAVE_BPF_DUMP
 178 struct bpf_program;
 179
 180 extern void bpf_dump(const struct bpf_program *, int);
 181
 182 #endif
 183
 184 #include "netdissect.h"
 185
 186 /* forward compatibility */
 187
 188 #ifndef NETDISSECT_REWORKED
 189 extern netdissect_options *gndo;
 190
 191 #define bflag gndo->ndo_bflag
 192 #define eflag gndo->ndo_eflag
 193 #define fflag gndo->ndo_fflag
 194 #define jflag gndo->ndo_jflag
 195 #define Kflag gndo->ndo_Kflag
 196 #define nflag gndo->ndo_nflag
 197 #define Nflag gndo->ndo_Nflag
 198 #define Oflag gndo->ndo_Oflag
 199 #define pflag gndo->ndo_pflag
 200 #define qflag gndo->ndo_qflag
 201 #define Rflag gndo->ndo_Rflag
 202 #define sflag gndo->ndo_sflag
 203 #define Sflag gndo->ndo_Sflag
 204 #define tflag gndo->ndo_tflag
 205 #define Uflag gndo->ndo_Uflag
 206 #define uflag gndo->ndo_uflag
 207 #define vflag gndo->ndo_vflag
 208 #define xflag gndo->ndo_xflag
 209 #define Xflag gndo->ndo_Xflag
 210 #define Cflag gndo->ndo_Cflag
 211 #define Gflag gndo->ndo_Gflag
 212 #define Aflag gndo->ndo_Aflag
 213 #define Bflag gndo->ndo_Bflag
 214 #define Iflag gndo->ndo_Iflag
 215 #define suppress_default_print gndo->ndo_suppress_default_print
 216 #define packettype gndo->ndo_packettype
 217 #define sigsecret gndo->ndo_sigsecret
 218 #define Wflag gndo->ndo_Wflag
 219 #define WflagChars gndo->ndo_WflagChars
 220 #define Cflag_count gndo->ndo_Cflag_count
 221 #define Gflag_count gndo->ndo_Gflag_count
 222 #define Gflag_time gndo->ndo_Gflag_time
 223 #define Hflag gndo->ndo_Hflag
 224 #define snaplen     gndo->ndo_snaplen
 225 #define snapend     gndo->ndo_snapend
 226
 227 extern void default_print(const u_char *, u_int);
 228
 229 #endif