6 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 #include "file_wrappers.h"
35 static gboolean iptrace_read_1_0(wtap *wth, int *err, gchar **err_info,
37 static gboolean iptrace_seek_read_1_0(wtap *wth, gint64 seek_off,
38 union wtap_pseudo_header *pseudo_header, guchar *pd, int packet_size,
39 int *err, gchar **err_info);
41 static gboolean iptrace_read_2_0(wtap *wth, int *err, gchar **err_info,
43 static gboolean iptrace_seek_read_2_0(wtap *wth, gint64 seek_off,
44 union wtap_pseudo_header *pseudo_header, guchar *pd, int packet_size,
45 int *err, gchar **err_info);
47 static int iptrace_read_rec_header(FILE_T fh, guint8 *header, int header_len,
49 static gboolean iptrace_read_rec_data(FILE_T fh, guint8 *data_ptr,
50 int packet_size, int *err);
51 static void fill_in_pseudo_header(int encap, const guint8 *pd, guint32 len,
52 union wtap_pseudo_header *pseudo_header, guint8 *header);
53 static int wtap_encap_ift(unsigned int ift);
55 int iptrace_open(wtap *wth, int *err, gchar **err_info _U_)
60 errno = WTAP_ERR_CANT_READ;
61 bytes_read = file_read(name, 1, 11, wth->fh);
62 if (bytes_read != 11) {
63 *err = file_error(wth->fh);
68 wth->data_offset += 11;
71 if (strcmp(name, "iptrace 1.0") == 0) {
72 wth->file_type = WTAP_FILE_IPTRACE_1_0;
73 wth->subtype_read = iptrace_read_1_0;
74 wth->subtype_seek_read = iptrace_seek_read_1_0;
75 wth->tsprecision = WTAP_FILE_TSPREC_SEC;
77 else if (strcmp(name, "iptrace 2.0") == 0) {
78 wth->file_type = WTAP_FILE_IPTRACE_2_0;
79 wth->subtype_read = iptrace_read_2_0;
80 wth->subtype_seek_read = iptrace_seek_read_2_0;
81 wth->tsprecision = WTAP_FILE_TSPREC_NSEC;
90 /***********************************************************
92 ***********************************************************/
95 * iptrace 1.0, discovered through inspection
97 * Packet record contains:
99 * an initial header, with a length field and a time stamp, in
100 * seconds since the Epoch;
102 * data, with the specified length.
106 * a bunch of information about the packet;
108 * padding, at least for FDDI;
110 * the raw packet data.
113 /* 0-3 */ guint32 pkt_length; /* packet length + 0x16 */
114 /* 4-7 */ guint32 tv_sec; /* time stamp, seconds since the Epoch */
115 /* 8-11 */ guint32 junk1; /* ???, not time */
116 /* 12-15 */ char if_name[4]; /* null-terminated */
117 /* 16-27 */ char junk2[12]; /* ??? */
118 /* 28 */ guint8 if_type; /* BSD net/if_types.h */
119 /* 29 */ guint8 tx_flag; /* 0=receive, 1=transmit */
122 #define IPTRACE_1_0_PHDR_SIZE 30 /* initial header plus packet data */
123 #define IPTRACE_1_0_PDATA_SIZE 22 /* packet data */
125 /* Read the next packet */
126 static gboolean iptrace_read_1_0(wtap *wth, int *err, gchar **err_info _U_,
131 guint8 header[IPTRACE_1_0_PHDR_SIZE];
133 iptrace_1_0_phdr pkt_hdr;
134 guchar fddi_padding[3];
136 /* Read the descriptor data */
137 *data_offset = wth->data_offset;
138 ret = iptrace_read_rec_header(wth->fh, header, IPTRACE_1_0_PHDR_SIZE,
141 /* Read error or EOF */
144 wth->data_offset += IPTRACE_1_0_PHDR_SIZE;
147 * Byte 28 of the frame header appears to be a BSD-style IFT_xxx
148 * value giving the type of the interface. Check out the
149 * <net/if_types.h> header file.
151 pkt_hdr.if_type = header[28];
152 wth->phdr.pkt_encap = wtap_encap_ift(pkt_hdr.if_type);
154 /* Read the packet data */
155 packet_size = pntohl(&header[0]) - IPTRACE_1_0_PDATA_SIZE;
158 * AIX appears to put 3 bytes of padding in front of FDDI
159 * frames; strip that crap off.
161 if (wth->phdr.pkt_encap == WTAP_ENCAP_FDDI_BITSWAPPED) {
163 * The packet size is really a record size and includes
167 wth->data_offset += 3;
172 if (!iptrace_read_rec_data(wth->fh, fddi_padding, 3, err))
173 return FALSE; /* Read error */
176 buffer_assure_space( wth->frame_buffer, packet_size );
177 data_ptr = buffer_start_ptr( wth->frame_buffer );
178 if (!iptrace_read_rec_data(wth->fh, data_ptr, packet_size, err))
179 return FALSE; /* Read error */
180 wth->data_offset += packet_size;
182 wth->phdr.len = packet_size;
183 wth->phdr.caplen = packet_size;
184 wth->phdr.ts.secs = pntohl(&header[4]);
185 wth->phdr.ts.nsecs = 0;
187 if (wth->phdr.pkt_encap == WTAP_ENCAP_UNKNOWN) {
188 *err = WTAP_ERR_UNSUPPORTED_ENCAP;
189 *err_info = g_strdup_printf("iptrace: interface type IFT=0x%02x unknown or unsupported",
194 /* Fill in the pseudo-header. */
195 fill_in_pseudo_header(wth->phdr.pkt_encap, data_ptr, wth->phdr.caplen,
196 &wth->pseudo_header, header);
198 /* If the per-file encapsulation isn't known, set it to this
199 packet's encapsulation.
201 If it *is* known, and it isn't this packet's encapsulation,
202 set it to WTAP_ENCAP_PER_PACKET, as this file doesn't
203 have a single encapsulation for all packets in the file. */
204 if (wth->file_encap == WTAP_ENCAP_UNKNOWN)
205 wth->file_encap = wth->phdr.pkt_encap;
207 if (wth->file_encap != wth->phdr.pkt_encap)
208 wth->file_encap = WTAP_ENCAP_PER_PACKET;
214 static gboolean iptrace_seek_read_1_0(wtap *wth, gint64 seek_off,
215 union wtap_pseudo_header *pseudo_header, guchar *pd, int packet_size,
216 int *err, gchar **err_info _U_)
219 guint8 header[IPTRACE_1_0_PHDR_SIZE];
221 guchar fddi_padding[3];
223 if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
226 /* Read the descriptor data */
227 ret = iptrace_read_rec_header(wth->random_fh, header,
228 IPTRACE_1_0_PHDR_SIZE, err);
230 /* Read error or EOF */
232 /* EOF means "short read" in random-access mode */
233 *err = WTAP_ERR_SHORT_READ;
239 * Get the interface type.
241 pkt_encap = wtap_encap_ift(header[28]);
244 * AIX appears to put 3 bytes of padding in front of FDDI
245 * frames; strip that crap off.
247 if (pkt_encap == WTAP_ENCAP_FDDI_BITSWAPPED) {
251 if (!iptrace_read_rec_data(wth->random_fh, fddi_padding, 3, err))
252 return FALSE; /* Read error */
255 /* Get the packet data */
256 if (!iptrace_read_rec_data(wth->random_fh, pd, packet_size, err))
259 /* Fill in the pseudo_header. */
260 fill_in_pseudo_header(pkt_encap, pd, packet_size, pseudo_header,
266 /***********************************************************
268 ***********************************************************/
271 * iptrace 2.0, discovered through inspection
273 * Packet record contains:
275 * an initial header, with a length field and a time stamp, in
276 * seconds since the Epoch;
278 * data, with the specified length.
282 * a bunch of information about the packet;
284 * padding, at least for FDDI;
286 * the raw packet data.
289 /* 0-3 */ guint32 pkt_length; /* packet length + 32 */
290 /* 4-7 */ guint32 tv_sec0; /* time stamp, seconds since the Epoch */
291 /* 8-11 */ guint32 junk1; /* ?? */
292 /* 12-15 */ char if_name[4]; /* null-terminated */
293 /* 16-27 */ char if_desc[12]; /* interface description. */
294 /* 28 */ guint8 if_type; /* BSD net/if_types.h */
295 /* 29 */ guint8 tx_flag; /* 0=receive, 1=transmit */
296 /* 30-31 */ guint16 junk3;
297 /* 32-35 */ guint32 tv_sec; /* time stamp, seconds since the Epoch */
298 /* 36-39 */ guint32 tv_nsec; /* nanoseconds since that second */
301 #define IPTRACE_2_0_PHDR_SIZE 40 /* initial header plus packet data */
302 #define IPTRACE_2_0_PDATA_SIZE 32 /* packet data */
304 /* Read the next packet */
305 static gboolean iptrace_read_2_0(wtap *wth, int *err, gchar **err_info _U_,
310 guint8 header[IPTRACE_2_0_PHDR_SIZE];
312 iptrace_2_0_phdr pkt_hdr;
313 guchar fddi_padding[3];
315 /* Read the descriptor data */
316 *data_offset = wth->data_offset;
317 ret = iptrace_read_rec_header(wth->fh, header, IPTRACE_2_0_PHDR_SIZE,
320 /* Read error or EOF */
323 wth->data_offset += IPTRACE_2_0_PHDR_SIZE;
326 * Byte 28 of the frame header appears to be a BSD-style IFT_xxx
327 * value giving the type of the interface. Check out the
328 * <net/if_types.h> header file.
330 pkt_hdr.if_type = header[28];
331 wth->phdr.pkt_encap = wtap_encap_ift(pkt_hdr.if_type);
333 /* Read the packet data */
334 packet_size = pntohl(&header[0]) - IPTRACE_2_0_PDATA_SIZE;
337 * AIX appears to put 3 bytes of padding in front of FDDI
338 * frames; strip that crap off.
340 if (wth->phdr.pkt_encap == WTAP_ENCAP_FDDI_BITSWAPPED) {
342 * The packet size is really a record size and includes
346 wth->data_offset += 3;
351 if (!iptrace_read_rec_data(wth->fh, fddi_padding, 3, err))
352 return FALSE; /* Read error */
355 buffer_assure_space( wth->frame_buffer, packet_size );
356 data_ptr = buffer_start_ptr( wth->frame_buffer );
357 if (!iptrace_read_rec_data(wth->fh, data_ptr, packet_size, err))
358 return FALSE; /* Read error */
359 wth->data_offset += packet_size;
361 wth->phdr.len = packet_size;
362 wth->phdr.caplen = packet_size;
363 wth->phdr.ts.secs = pntohl(&header[32]);
364 wth->phdr.ts.nsecs = pntohl(&header[36]);
366 if (wth->phdr.pkt_encap == WTAP_ENCAP_UNKNOWN) {
367 *err = WTAP_ERR_UNSUPPORTED_ENCAP;
368 *err_info = g_strdup_printf("iptrace: interface type IFT=0x%02x unknown or unsupported",
373 /* Fill in the pseudo-header. */
374 fill_in_pseudo_header(wth->phdr.pkt_encap, data_ptr, wth->phdr.caplen,
375 &wth->pseudo_header, header);
377 /* If the per-file encapsulation isn't known, set it to this
378 packet's encapsulation.
380 If it *is* known, and it isn't this packet's encapsulation,
381 set it to WTAP_ENCAP_PER_PACKET, as this file doesn't
382 have a single encapsulation for all packets in the file. */
383 if (wth->file_encap == WTAP_ENCAP_UNKNOWN)
384 wth->file_encap = wth->phdr.pkt_encap;
386 if (wth->file_encap != wth->phdr.pkt_encap)
387 wth->file_encap = WTAP_ENCAP_PER_PACKET;
393 static gboolean iptrace_seek_read_2_0(wtap *wth, gint64 seek_off,
394 union wtap_pseudo_header *pseudo_header, guchar *pd, int packet_size,
395 int *err, gchar **err_info _U_)
398 guint8 header[IPTRACE_2_0_PHDR_SIZE];
400 guchar fddi_padding[3];
402 if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
405 /* Read the descriptor data */
406 ret = iptrace_read_rec_header(wth->random_fh, header,
407 IPTRACE_2_0_PHDR_SIZE, err);
409 /* Read error or EOF */
411 /* EOF means "short read" in random-access mode */
412 *err = WTAP_ERR_SHORT_READ;
418 * Get the interface type.
420 pkt_encap = wtap_encap_ift(header[28]);
423 * AIX appears to put 3 bytes of padding in front of FDDI
424 * frames; strip that crap off.
426 if (pkt_encap == WTAP_ENCAP_FDDI_BITSWAPPED) {
430 if (!iptrace_read_rec_data(wth->random_fh, fddi_padding, 3, err))
431 return FALSE; /* Read error */
434 /* Get the packet data */
435 if (!iptrace_read_rec_data(wth->random_fh, pd, packet_size, err))
438 /* Fill in the pseudo-header. */
439 fill_in_pseudo_header(pkt_encap, pd, packet_size, pseudo_header,
446 iptrace_read_rec_header(FILE_T fh, guint8 *header, int header_len, int *err)
450 errno = WTAP_ERR_CANT_READ;
451 bytes_read = file_read(header, 1, header_len, fh);
452 if (bytes_read != header_len) {
453 *err = file_error(fh);
456 if (bytes_read != 0) {
457 *err = WTAP_ERR_SHORT_READ;
466 iptrace_read_rec_data(FILE_T fh, guint8 *data_ptr, int packet_size, int *err)
470 errno = WTAP_ERR_CANT_READ;
471 bytes_read = file_read( data_ptr, 1, packet_size, fh );
473 if (bytes_read != packet_size) {
474 *err = file_error(fh);
476 *err = WTAP_ERR_SHORT_READ;
483 * Fill in the pseudo-header information we can.
485 * For ATM traffic, "iptrace", alas, doesn't tell us what type of traffic
486 * is in the packet - it was presumably run on a machine that was one of
487 * the endpoints of the connection, so in theory it could presumably have
488 * told us, but, for whatever reason, it failed to do so - perhaps the
489 * low-level mechanism that feeds the presumably-AAL5 frames to us doesn't
490 * have access to that information (e.g., because it's in the ATM driver,
491 * and the ATM driver merely knows that stuff on VPI/VCI X.Y should be
492 * handed up to some particular client, it doesn't know what that client is).
494 * We let our caller try to figure out what kind of traffic it is, either
495 * by guessing based on the VPI/VCI, guessing based on the header of the
496 * packet, seeing earlier traffic that set up the circuit and specified
497 * in some fashion what sort of traffic it is, or being told by the user.
500 fill_in_pseudo_header(int encap, const guint8 *pd, guint32 len,
501 union wtap_pseudo_header *pseudo_header, guint8 *header)
510 case WTAP_ENCAP_ATM_PDUS:
511 /* Rip apart the "x.y" text into Vpi/Vci numbers */
512 memcpy(if_text, &header[20], 8);
514 decimal = strchr(if_text, '.');
517 Vpi = strtoul(if_text, NULL, 10);
519 Vci = strtoul(decimal, NULL, 10);
523 * OK, which value means "DTE->DCE" and which value means
526 pseudo_header->atm.channel = header[29];
528 pseudo_header->atm.vpi = Vpi;
529 pseudo_header->atm.vci = Vci;
532 * Attempt to guess from the packet data, the VPI,
533 * and the VCI information about the type of traffic.
535 atm_guess_traffic_type(pd, len, pseudo_header);
537 /* We don't have this information */
538 pseudo_header->atm.flags = 0;
539 pseudo_header->atm.cells = 0;
540 pseudo_header->atm.aal5t_u2u = 0;
541 pseudo_header->atm.aal5t_len = 0;
542 pseudo_header->atm.aal5t_chksum = 0;
545 case WTAP_ENCAP_ETHERNET:
546 /* We assume there's no FCS in this frame. */
547 pseudo_header->eth.fcs_len = 0;
552 /* Given an RFC1573 (SNMP ifType) interface type,
553 * return the appropriate Wiretap Encapsulation Type.
556 wtap_encap_ift(unsigned int ift)
559 static const int ift_encap[] = {
560 /* 0x0 */ WTAP_ENCAP_UNKNOWN, /* nothing */
561 /* 0x1 */ WTAP_ENCAP_UNKNOWN, /* IFT_OTHER */
562 /* 0x2 */ WTAP_ENCAP_UNKNOWN, /* IFT_1822 */
563 /* 0x3 */ WTAP_ENCAP_UNKNOWN, /* IFT_HDH1822 */
564 /* 0x4 */ WTAP_ENCAP_RAW_IP, /* IFT_X25DDN */
565 /* 0x5 */ WTAP_ENCAP_UNKNOWN, /* IFT_X25 */
566 /* 0x6 */ WTAP_ENCAP_ETHERNET, /* IFT_ETHER */
567 /* 0x7 */ WTAP_ENCAP_ETHERNET, /* IFT_ISO88023 */
568 /* 0x8 */ WTAP_ENCAP_UNKNOWN, /* IFT_ISO88024 */
569 /* 0x9 */ WTAP_ENCAP_TOKEN_RING, /* IFT_ISO88025 */
570 /* 0xa */ WTAP_ENCAP_UNKNOWN, /* IFT_ISO88026 */
571 /* 0xb */ WTAP_ENCAP_UNKNOWN, /* IFT_STARLAN */
572 /* 0xc */ WTAP_ENCAP_RAW_IP, /* IFT_P10, IBM SP switch */
573 /* 0xd */ WTAP_ENCAP_UNKNOWN, /* IFT_P80 */
574 /* 0xe */ WTAP_ENCAP_UNKNOWN, /* IFT_HY */
575 /* 0xf */ WTAP_ENCAP_FDDI_BITSWAPPED, /* IFT_FDDI */
576 /* 0x10 */ WTAP_ENCAP_LAPB, /* IFT_LAPB */ /* no data to back this up */
577 /* 0x11 */ WTAP_ENCAP_UNKNOWN, /* IFT_SDLC */
578 /* 0x12 */ WTAP_ENCAP_UNKNOWN, /* IFT_T1 */
579 /* 0x13 */ WTAP_ENCAP_UNKNOWN, /* IFT_CEPT */
580 /* 0x14 */ WTAP_ENCAP_UNKNOWN, /* IFT_ISDNBASIC */
581 /* 0x15 */ WTAP_ENCAP_UNKNOWN, /* IFT_ISDNPRIMARY */
582 /* 0x16 */ WTAP_ENCAP_UNKNOWN, /* IFT_PTPSERIAL */
583 /* 0x17 */ WTAP_ENCAP_UNKNOWN, /* IFT_PPP */
584 /* 0x18 */ WTAP_ENCAP_RAW_IP, /* IFT_LOOP */
585 /* 0x19 */ WTAP_ENCAP_UNKNOWN, /* IFT_EON */
586 /* 0x1a */ WTAP_ENCAP_UNKNOWN, /* IFT_XETHER */
587 /* 0x1b */ WTAP_ENCAP_UNKNOWN, /* IFT_NSIP */
588 /* 0x1c */ WTAP_ENCAP_UNKNOWN, /* IFT_SLIP */
589 /* 0x1d */ WTAP_ENCAP_UNKNOWN, /* IFT_ULTRA */
590 /* 0x1e */ WTAP_ENCAP_UNKNOWN, /* IFT_DS3 */
591 /* 0x1f */ WTAP_ENCAP_UNKNOWN, /* IFT_SIP */
592 /* 0x20 */ WTAP_ENCAP_UNKNOWN, /* IFT_FRELAY */
593 /* 0x21 */ WTAP_ENCAP_UNKNOWN, /* IFT_RS232 */
594 /* 0x22 */ WTAP_ENCAP_UNKNOWN, /* IFT_PARA */
595 /* 0x23 */ WTAP_ENCAP_UNKNOWN, /* IFT_ARCNET */
596 /* 0x24 */ WTAP_ENCAP_UNKNOWN, /* IFT_ARCNETPLUS */
597 /* 0x25 */ WTAP_ENCAP_ATM_PDUS, /* IFT_ATM */
599 #define NUM_IFT_ENCAPS (sizeof ift_encap / sizeof ift_encap[0])
601 if (ift < NUM_IFT_ENCAPS) {
602 return ift_encap[ift];
605 return WTAP_ENCAP_UNKNOWN;