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1 /*
2  * Copyright (c) 1988-1997
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Copyright (c) 1998-2004  Michael Richardson <mcr@tcpdump.org>
6  *      The TCPDUMP project
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that: (1) source code distributions
10  * retain the above copyright notice and this paragraph in its entirety, (2)
11  * distributions including binary code include the above copyright notice and
12  * this paragraph in its entirety in the documentation or other materials
13  * provided with the distribution, and (3) all advertising materials mentioning
14  * features or use of this software display the following acknowledgement:
15  * ``This product includes software developed by the University of California,
16  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
17  * the University nor the names of its contributors may be used to endorse
18  * or promote products derived from this software without specific prior
19  * written permission.
20  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
21  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
22  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23  *
24  * @(#) $Header: /tcpdump/master/tcpdump/netdissect.h,v 1.16.2.4 2006/02/08 01:40:09 hannes Exp $ (LBL)
25  */
26 
27 #ifndef netdissect_h
28 #define netdissect_h
29 
30 #ifdef HAVE_OS_PROTO_H
31 #include "os-proto.h"
32 #endif
33 #include <sys/types.h>
34 
35 #ifndef HAVE___ATTRIBUTE__
36 #define __attribute__(x)
37 #endif
38 
39 /* snprintf et al */
40 
41 #include <stdarg.h>
42 
43 #if !defined(HAVE_SNPRINTF)
44 int snprintf (char *str, size_t sz, const char *format, ...)
45      __attribute__ ((format (printf, 3, 4)));
46 #endif
47 
48 #if !defined(HAVE_VSNPRINTF)
49 int vsnprintf (char *str, size_t sz, const char *format, va_list ap)
50      __attribute__((format (printf, 3, 0)));
51 #endif
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 *str);
62 #endif
63 
64 #ifndef HAVE_STRSEP
65 extern char *strsep(char **, const char *);
66 #endif
67 
68 struct tok {
69 	int v;			/* value */
70 	const char *s;		/* string */
71 };
72 
73 #define TOKBUFSIZE 128
74 extern const char *tok2strbuf(const struct tok *, const char *, int,
75 			      char *buf, size_t bufsize);
76 
77 /* tok2str is deprecated */
78 extern const char *tok2str(const struct tok *, const char *, int);
79 extern char *bittok2str(const struct tok *, const char *, int);
80 
81 
82 typedef struct netdissect_options netdissect_options;
83 
84 struct netdissect_options {
85   int ndo_aflag;		/* translate network and broadcast addresses */
86   int ndo_eflag;		/* print ethernet header */
87   int ndo_fflag;		/* don't translate "foreign" IP address */
88   int ndo_nflag;		/* leave addresses as numbers */
89   int ndo_Nflag;		/* remove domains from printed host names */
90   int ndo_qflag;		/* quick (shorter) output */
91   int ndo_Rflag;		/* print sequence # field in AH/ESP*/
92   int ndo_sflag;		/* use the libsmi to translate OIDs */
93   int ndo_Sflag;		/* print raw TCP sequence numbers */
94   int ndo_tflag;		/* print packet arrival time */
95   int ndo_Uflag;		/* "unbuffered" output of dump files */
96   int ndo_uflag;		/* Print undecoded NFS handles */
97   int ndo_vflag;		/* verbose */
98   int ndo_xflag;		/* print packet in hex */
99   int ndo_Xflag;		/* print packet in hex/ascii */
100   int ndo_Aflag;		/* print packet only in ascii observing TAB,
101 				 * LF, CR and SPACE as graphical chars
102 				 */
103   int ndo_Oflag;                /* run filter code optimizer */
104   int ndo_dlt;                  /* if != -1, ask libpcap for the DLT it names*/
105   int ndo_pflag;                /* don't go promiscuous */
106 
107   int ndo_Cflag;                /* rotate dump files after this many bytes */
108   int ndo_Cflag_count;      /* Keep track of which file number we're writing */
109   int ndo_Wflag;          /* recycle output files after this number of files */
110   int ndo_WflagChars;
111   int ndo_suppress_default_print; /* don't use default_print() for unknown packet types */
112   const char *ndo_dltname;
113 
114   char *ndo_espsecret;
115   struct sa_list *ndo_sa_list_head;  /* used by print-esp.c */
116   struct sa_list *ndo_sa_default;
117 
118   char *ndo_tcpmd5secret;     	/* TCP-MD5 secret key */
119 
120   struct esp_algorithm *ndo_espsecret_xform;   /* cache of decoded  */
121   char                 *ndo_espsecret_key;
122 
123   int   ndo_packettype;	/* as specified by -T */
124 
125   char *ndo_program_name;	/*used to generate self-identifying messages */
126 
127   int32_t ndo_thiszone;	/* seconds offset from gmt to local time */
128 
129   int   ndo_snaplen;
130 
131   /*global pointers to beginning and end of current packet (during printing) */
132   const u_char *ndo_packetp;
133   const u_char *ndo_snapend;
134 
135   /* bookkeeping for ^T output */
136   int ndo_infodelay;
137 
138   /* pointer to void function to output stuff */
139   void (*ndo_default_print)(netdissect_options *,
140   		      register const u_char *bp, register u_int length);
141   void (*ndo_info)(netdissect_options *, int verbose);
142 
143   int  (*ndo_printf)(netdissect_options *,
144 		     const char *fmt, ...);
145   void (*ndo_error)(netdissect_options *,
146 		    const char *fmt, ...);
147   void (*ndo_warning)(netdissect_options *,
148 		      const char *fmt, ...);
149 };
150 
151 #define PT_VAT		1	/* Visual Audio Tool */
152 #define PT_WB		2	/* distributed White Board */
153 #define PT_RPC		3	/* Remote Procedure Call */
154 #define PT_RTP		4	/* Real-Time Applications protocol */
155 #define PT_RTCP		5	/* Real-Time Applications control protocol */
156 #define PT_SNMP		6	/* Simple Network Management Protocol */
157 #define PT_CNFP		7	/* Cisco NetFlow protocol */
158 
159 #ifndef min
160 #define min(a,b) ((a)>(b)?(b):(a))
161 #endif
162 #ifndef max
163 #define max(a,b) ((b)>(a)?(b):(a))
164 #endif
165 
166 #ifndef INET6
167 /*
168  * The default snapshot length.  This value allows most printers to print
169  * useful information while keeping the amount of unwanted data down.
170  * In particular, it allows for an ethernet header, tcp/ip header, and
171  * 14 bytes of data (assuming no ip options).
172  */
173 #define DEFAULT_SNAPLEN 68
174 #else
175 #define DEFAULT_SNAPLEN 96
176 #endif
177 
178 #ifndef BIG_ENDIAN
179 #define BIG_ENDIAN 4321
180 #define LITTLE_ENDIAN 1234
181 #endif
182 
183 #define ESRC(ep) ((ep)->ether_shost)
184 #define EDST(ep) ((ep)->ether_dhost)
185 
186 #ifndef NTOHL
187 #define NTOHL(x)	(x) = ntohl(x)
188 #define NTOHS(x)	(x) = ntohs(x)
189 #define HTONL(x)	(x) = htonl(x)
190 #define HTONS(x)	(x) = htons(x)
191 #endif
192 
193 /*
194  * True if "l" bytes of "var" were captured.
195  *
196  * The "ndo->ndo_snapend - (l) <= ndo->ndo_snapend" checks to make sure
197  * "l" isn't so large that "ndo->ndo_snapend - (l)" underflows.
198  *
199  * The check is for <= rather than < because "l" might be 0.
200  */
201 #define ND_TTEST2(var, l) (ndo->ndo_snapend - (l) <= ndo->ndo_snapend && \
202 			(const u_char *)&(var) <= ndo->ndo_snapend - (l))
203 
204 /* True if "var" was captured */
205 #define ND_TTEST(var) ND_TTEST2(var, sizeof(var))
206 
207 /* Bail if "l" bytes of "var" were not captured */
208 #define ND_TCHECK2(var, l) if (!ND_TTEST2(var, l)) goto trunc
209 
210 /* Bail if "var" was not captured */
211 #define ND_TCHECK(var) ND_TCHECK2(var, sizeof(var))
212 
213 #define ND_PRINT(STUFF) (*ndo->ndo_printf)STUFF
214 #define ND_DEFAULTPRINT(ap, length) (*ndo->ndo_default_print)(ndo, ap, length)
215 
216 #if 0
217 extern void ts_print(netdissect_options *ipdo,
218 		     const struct timeval *);
219 extern void relts_print(int);
220 #endif
221 
222 extern int fn_print(const u_char *, const u_char *);
223 extern int fn_printn(const u_char *, u_int, const u_char *);
224 extern const char *tok2str(const struct tok *, const char *, int);
225 
226 extern void wrapup(int);
227 
228 #if 0
229 extern char *read_infile(netdissect_options *, char *);
230 extern char *copy_argv(netdissect_options *, char **);
231 #endif
232 
233 extern void safeputchar(int);
234 extern void safeputs(const char *, int);
235 
236 #if 0
237 extern const char *isonsap_string(netdissect_options *, const u_char *);
238 extern const char *protoid_string(netdissect_options *, const u_char *);
239 extern const char *dnname_string(netdissect_options *, u_short);
240 extern const char *dnnum_string(netdissect_options *, u_short);
241 #endif
242 
243 /* The printer routines. */
244 
245 #include <pcap.h>
246 
247 
248 extern void eap_print(netdissect_options *,const u_char *, u_int);
249 extern int esp_print(netdissect_options *,
250 		     register const u_char *bp, int len, register const u_char *bp2,
251 		     int *nhdr, int *padlen);
252 extern void arp_print(netdissect_options *,const u_char *, u_int, u_int);
253 extern void isakmp_print(netdissect_options *,const u_char *,
254 			 u_int, const u_char *);
255 extern void isakmp_rfc3948_print(netdissect_options *,const u_char *,
256 				 u_int, const u_char *);
257 extern void ip_print(netdissect_options *,const u_char *, u_int);
258 extern void ip_print_inner(netdissect_options *ndo,
259 			   const u_char *bp, u_int length, u_int nh,
260 			   const u_char *bp2);
261 
262 /* stuff that has not yet been rototiled */
263 #if 0
264 extern void ascii_print(netdissect_options *,u_int);
265 extern void hex_and_ascii_print_with_offset(netdissect_options *,const char *,
266 				    u_int, u_int);
267 extern void hex_and_ascii_print(netdissect_options *,const char *, u_int);
268 extern void hex_print_with_offset(netdissect_options *,const char *,
269 				  u_int, u_int);
270 extern void hex_print(netdissect_options *,const char *, u_int);
271 extern void telnet_print(netdissect_options *,const u_char *, u_int);
272 extern int ether_encap_print(netdissect_options *,u_short, const u_char *,
273 			     u_int, u_int, u_short *);
274 extern int llc_print(netdissect_options *,
275 		     const u_char *, u_int, u_int, const u_char *,
276 		     const u_char *, u_short *);
277 extern void aarp_print(netdissect_options *,const u_char *, u_int);
278 extern void atalk_print(netdissect_options *,const u_char *, u_int);
279 extern void atm_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
280 extern void bootp_print(netdissect_options *,const u_char *,
281 			u_int, u_short, u_short);
282 extern void bgp_print(netdissect_options *,const u_char *, int);
283 extern void bxxp_print(netdissect_options *,const u_char *, u_int);
284 extern void chdlc_if_print(u_char *user, const struct pcap_pkthdr *h,
285 			   register const u_char *p);
286 extern void chdlc_print(netdissect_options *ndo,
287 			register const u_char *p, u_int length, u_int caplen);
288 extern void cisco_autorp_print(netdissect_options *,
289 			       const u_char *, u_int);
290 extern void cnfp_print(netdissect_options *,const u_char *cp,
291 		       u_int len, const u_char *bp);
292 extern void decnet_print(netdissect_options *,const u_char *,
293 			 u_int, u_int);
294 extern void default_print(netdissect_options *,const u_char *, u_int);
295 extern void dvmrp_print(netdissect_options *,const u_char *, u_int);
296 extern void egp_print(netdissect_options *,const u_char *, u_int,
297 		      const u_char *);
298 
299 extern void arcnet_if_print(u_char*,const struct pcap_pkthdr *,const u_char *);
300 extern void ether_if_print(u_char *,const struct pcap_pkthdr *,const u_char *);
301 extern void token_if_print(u_char *,const struct pcap_pkthdr *,const u_char *);
302 extern void fddi_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
303 
304 extern void gre_print(netdissect_options *,const u_char *, u_int);
305 extern void icmp_print(netdissect_options *,const u_char *, u_int,
306 		       const u_char *);
307 extern void hsrp_print(netdissect_options *ndo,
308 		       register const u_char *bp, register u_int len);
309 extern void ieee802_11_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
310 extern void igmp_print(netdissect_options *,
311 		       register const u_char *, u_int);
312 extern void igrp_print(netdissect_options *,const u_char *, u_int,
313 		       const u_char *);
314 extern void ipN_print(netdissect_options *,const u_char *, u_int);
315 extern void ipx_print(netdissect_options *,const u_char *, u_int);
316 extern void isoclns_print(netdissect_options *,const u_char *,
317 			  u_int, u_int, const u_char *,	const u_char *);
318 extern void krb_print(netdissect_options *,const u_char *, u_int);
319 extern void llap_print(netdissect_options *,const u_char *, u_int);
320 extern const char *linkaddr_string(netdissect_options *ndo,
321 				   const u_char *ep, const unsigned int len);
322 extern void ltalk_if_print(netdissect_options *ndo,
323 			   u_char *user, const struct pcap_pkthdr *h,
324 			   const u_char *p);
325 extern void mpls_print(netdissect_options *ndo,
326 		       const u_char *bp, u_int length);
327 extern void msdp_print(netdissect_options *ndo,
328 		       const unsigned char *sp, u_int length);
329 extern void nfsreply_print(netdissect_options *,const u_char *,
330 			   u_int, const u_char *);
331 extern void nfsreq_print(netdissect_options *,const u_char *,
332 			 u_int, const u_char *);
333 extern void ns_print(netdissect_options *,const u_char *, u_int);
334 extern void ntp_print(netdissect_options *,const u_char *, u_int);
335 extern void null_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
336 extern void ospf_print(netdissect_options *,const u_char *,
337 		       u_int, const u_char *);
338 extern void pimv1_print(netdissect_options *,const u_char *, u_int);
339 extern void mobile_print(netdissect_options *,const u_char *, u_int);
340 extern void pim_print(netdissect_options *,const u_char *, u_int);
341 extern void pppoe_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
342 extern void pppoe_print(netdissect_options *,const u_char *, u_int);
343 extern void ppp_print(netdissect_options *,
344 		      register const u_char *, u_int);
345 
346 extern void ppp_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
347 extern void ppp_hdlc_if_print(u_char *,
348 			      const struct pcap_pkthdr *, const u_char *);
349 extern void ppp_bsdos_if_print(u_char *,
350 			       const struct pcap_pkthdr *, const u_char *);
351 
352 extern int vjc_print(netdissect_options *,register const char *,
353 		     register u_int, u_short);
354 
355 extern void raw_if_print(u_char *,
356 			 const struct pcap_pkthdr *, const u_char *);
357 
358 extern void rip_print(netdissect_options *,const u_char *, u_int);
359 
360 extern void sctp_print(netdissect_options *ndo,
361 		       const u_char *bp, const u_char *bp2,
362 		       u_int sctpPacketLength);
363 
364 extern void sl_if_print(u_char *,const struct pcap_pkthdr *, const u_char *);
365 
366 extern void lane_if_print(u_char *,const struct pcap_pkthdr *,const u_char *);
367 extern void cip_if_print(u_char *,const struct pcap_pkthdr *,const u_char *);
368 extern void sl_bsdos_if_print(u_char *,
369 			      const struct pcap_pkthdr *, const u_char *);
370 extern void sll_if_print(u_char *,
371 			 const struct pcap_pkthdr *, const u_char *);
372 
373 extern void snmp_print(netdissect_options *,const u_char *, u_int);
374 extern void sunrpcrequest_print(netdissect_options *,const u_char *,
375 				u_int, const u_char *);
376 extern void tcp_print(netdissect_options *,const u_char *, u_int,
377 		      const u_char *, int);
378 extern void tftp_print(netdissect_options *,const u_char *, u_int);
379 extern void timed_print(netdissect_options *,const u_char *, u_int);
380 extern void udp_print(netdissect_options *,const u_char *, u_int,
381 		      const u_char *, int);
382 extern void wb_print(netdissect_options *,const void *, u_int);
383 extern int ah_print(netdissect_options *,register const u_char *,
384 		    register const u_char *);
385 extern void esp_print_decodesecret(netdissect_options *ndo);
386 extern int ipcomp_print(netdissect_options *,register const u_char *,
387 			register const u_char *, int *);
388 extern void rx_print(netdissect_options *,register const u_char *,
389 		     int, int, int, u_char *);
390 extern void netbeui_print(netdissect_options *,u_short,
391 			  const u_char *, int);
392 extern void ipx_netbios_print(netdissect_options *,const u_char *, u_int);
393 extern void nbt_tcp_print(netdissect_options *,const u_char *, int);
394 extern void nbt_udp137_print(netdissect_options *,
395 			     const u_char *data, int);
396 extern void nbt_udp138_print(netdissect_options *,
397 			     const u_char *data, int);
398 extern char *smb_errstr(netdissect_options *,int, int);
399 extern const char *nt_errstr(netdissect_options *, u_int32_t);
400 extern void print_data(netdissect_options *,const unsigned char *, int);
401 extern void l2tp_print(netdissect_options *,const u_char *, u_int);
402 extern void lcp_print(netdissect_options *,const u_char *, u_int);
403 extern void vrrp_print(netdissect_options *,const u_char *bp,
404 		       u_int len, int ttl);
405 extern void cdp_print(netdissect_options *,const u_char *,
406 		      u_int, u_int, const u_char *, const u_char *);
407 extern void stp_print(netdissect_options *,const u_char *p, u_int length);
408 extern void radius_print(netdissect_options *,const u_char *, u_int);
409 extern void lwres_print(netdissect_options *,const u_char *, u_int);
410 extern void pptp_print(netdissect_options *,const u_char *, u_int);
411 
412 #ifdef INET6
413 extern void ip6_print(netdissect_options *,const u_char *, u_int);
414 extern void ip6_opt_print(netdissect_options *,const u_char *, int);
415 extern int hbhopt_print(netdissect_options *,const u_char *);
416 extern int dstopt_print(netdissect_options *,const u_char *);
417 extern int frag6_print(netdissect_options *,const u_char *,
418 		       const u_char *);
419 extern void icmp6_print(netdissect_options *,const u_char *,
420 			const u_char *);
421 extern void ripng_print(netdissect_options *,const u_char *, int);
422 extern int rt6_print(netdissect_options *,const u_char *, const u_char *);
423 extern void ospf6_print(netdissect_options *,const u_char *, u_int);
424 extern void dhcp6_print(netdissect_options *,const u_char *,
425 			u_int, u_int16_t, u_int16_t);
426 
427 extern void zephyr_print(netdissect_options * ndo,
428 			 const u_char *cp, int length);
429 
430 #endif /*INET6*/
431 extern u_short in_cksum(const u_short *,
432 			register u_int, int);
433 
434 #endif
435 
436 #endif  /* netdissect_h */
437