1 /**-*-C-*-**********************************************************************
5 * Utility to convert an ASCII hexdump into a libpcap-format capture file
7 * (c) Copyright 2001 Ashok Narayanan <ashokn@cisco.com>
11 * Wireshark - Network traffic analyzer
12 * By Gerald Combs <gerald@wireshark.org>
13 * Copyright 1998 Gerald Combs
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version 2
18 * of the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 *******************************************************************************/
31 /*******************************************************************************
33 * This utility reads in an ASCII hexdump of this common format:
35 * 00000000 00 E0 1E A7 05 6F 00 10 5A A0 B9 12 08 00 46 00 .....o..Z.....F.
36 * 00000010 03 68 00 00 00 00 0A 2E EE 33 0F 19 08 7F 0F 19 .h.......3...
\7f..
37 * 00000020 03 80 94 04 00 00 10 01 16 A2 0A 00 03 50 00 0C .............P..
38 * 00000030 01 01 0F 19 03 80 11 01 1E 61 00 0C 03 01 0F 19 .........a......
40 * Each bytestring line consists of an offset, one or more bytes, and
41 * text at the end. An offset is defined as a hex string of more than
42 * two characters. A byte is defined as a hex string of exactly two
43 * characters. The text at the end is ignored, as is any text before
44 * the offset. Bytes read from a bytestring line are added to the
45 * current packet only if all the following conditions are satisfied:
47 * - No text appears between the offset and the bytes (any bytes appearing after
48 * such text would be ignored)
50 * - The offset must be arithmetically correct, i.e. if the offset is 00000020, then
51 * exactly 32 bytes must have been read into this packet before this. If the offset
52 * is wrong, the packet is immediately terminated
54 * A packet start is signalled by a zero offset.
56 * Lines starting with #TEXT2PCAP are directives. These allow the user
57 * to embed instructions into the capture file which allows text2pcap
58 * to take some actions (e.g. specifying the encapsulation
59 * etc.). Currently no directives are implemented.
61 * Lines beginning with # which are not directives are ignored as
62 * comments. Currently all non-hexdump text is ignored by text2pcap;
63 * in the future, text processing may be added, but lines prefixed
64 * with '#' will still be ignored.
66 * The output is a libpcap packet containing Ethernet frames by
67 * default. This program takes options which allow the user to add
68 * dummy Ethernet, IP and UDP or TCP headers to the packets in order
69 * to allow dumps of L3 or higher protocols to be decoded.
71 * Considerable flexibility is built into this code to read hexdumps
72 * of slightly different formats. For example, any text prefixing the
73 * hexdump line is dropped (including mail forwarding '>'). The offset
74 * can be any hex number of four digits or greater.
76 * This converter cannot read a single packet greater than 64K. Packet
77 * snaplength is automatically set to 64K.
85 * Just make sure we include the prototype for strptime as well
86 * (needed for glibc 2.2) but make sure we do this only if not
93 # define _XOPEN_SOURCE
97 * Defining _XOPEN_SOURCE is needed on some platforms, e.g. platforms
98 * using glibc, to expand the set of things system header files define.
100 * Unfortunately, on other platforms, such as some versions of Solaris
101 * (including Solaris 10), it *reduces* that set as well, causing
102 * strptime() not to be declared, presumably because the version of the
103 * X/Open spec that _XOPEN_SOURCE implies doesn't include strptime() and
104 * blah blah blah namespace pollution blah blah blah.
106 * So we define __EXTENSIONS__ so that "strptime()" is declared.
108 #ifndef __EXTENSIONS__
109 # define __EXTENSIONS__
116 #include <wsutil/file_util.h>
131 #include "wsutil/wsgetopt.h"
134 #ifdef NEED_STRPTIME_H
135 # include "wsutil/strptime.h"
138 #include "text2pcap.h"
139 #include "svnversion.h"
143 #include <shellapi.h>
146 /*--- Options --------------------------------------------------------------------*/
149 static int debug = 0;
151 static int quiet = FALSE;
153 /* Dummy Ethernet header */
154 static int hdr_ethernet = FALSE;
155 static unsigned long hdr_ethernet_proto = 0;
157 /* Dummy IP header */
158 static int hdr_ip = FALSE;
159 static long hdr_ip_proto = 0;
161 /* Dummy UDP header */
162 static int hdr_udp = FALSE;
163 static unsigned long hdr_dest_port = 0;
164 static unsigned long hdr_src_port = 0;
166 /* Dummy TCP header */
167 static int hdr_tcp = FALSE;
169 /* Dummy SCTP header */
170 static int hdr_sctp = FALSE;
171 static unsigned long hdr_sctp_src = 0;
172 static unsigned long hdr_sctp_dest = 0;
173 static unsigned long hdr_sctp_tag = 0;
175 /* Dummy DATA chunk header */
176 static int hdr_data_chunk = FALSE;
177 static unsigned char hdr_data_chunk_type = 0;
178 static unsigned char hdr_data_chunk_bits = 3;
179 static unsigned long hdr_data_chunk_tsn = 0;
180 static unsigned short hdr_data_chunk_sid = 0;
181 static unsigned short hdr_data_chunk_ssn = 0;
182 static unsigned long hdr_data_chunk_ppid = 0;
185 /*--- Local date -----------------------------------------------------------------*/
187 /* This is where we store the packet currently being built */
188 #define MAX_PACKET 64000
189 static unsigned char packet_buf[MAX_PACKET];
190 static unsigned long curr_offset = 0;
191 static unsigned long max_offset = MAX_PACKET;
192 static unsigned long packet_start = 0;
193 static void start_new_packet (void);
195 /* This buffer contains strings present before the packet offset 0 */
196 #define PACKET_PREAMBLE_MAX_LEN 2048
197 static unsigned char packet_preamble[PACKET_PREAMBLE_MAX_LEN+1];
198 static int packet_preamble_len = 0;
200 /* Number of packets read and written */
201 static unsigned long num_packets_read = 0;
202 static unsigned long num_packets_written = 0;
204 /* Time code of packet, derived from packet_preamble */
205 static time_t ts_sec = 0;
206 static guint32 ts_usec = 0;
207 static char *ts_fmt = NULL;
208 static struct tm timecode_default;
211 static const char *input_filename;
212 static FILE *input_file = NULL;
214 static const char *output_filename;
215 static FILE *output_file = NULL;
217 /* Offset base to parse */
218 static unsigned long offset_base = 16;
222 /* ----- State machine -----------------------------------------------------------*/
224 /* Current state of parser */
226 INIT, /* Waiting for start of new packet */
227 START_OF_LINE, /* Starting from beginning of line */
228 READ_OFFSET, /* Just read the offset */
229 READ_BYTE, /* Just read a byte */
230 READ_TEXT /* Just read text - ignore until EOL */
232 static parser_state_t state = INIT;
234 static const char *state_str[] = {"Init",
241 static const char *token_str[] = {"",
249 /* ----- Skeleton Packet Headers --------------------------------------------------*/
257 static hdr_ethernet_t HDR_ETHERNET = {
258 {0x0a, 0x02, 0x02, 0x02, 0x02, 0x02},
259 {0x0a, 0x01, 0x01, 0x01, 0x01, 0x01},
265 guint16 packet_length;
266 guint16 identification;
271 guint16 hdr_checksum;
276 static hdr_ip_t HDR_IP = {0x45, 0, 0, 0x3412, 0, 0, 0xff, 0, 0, 0x0101010a, 0x0202020a};
278 static struct { /* pseudo header for checksum calculation */
293 static hdr_udp_t HDR_UDP = {0, 0, 0, 0};
307 static hdr_tcp_t HDR_TCP = {0, 0, 0, 0, 0x50, 0, 0, 0, 0};
316 static hdr_sctp_t HDR_SCTP = {0, 0, 0, 0};
328 static hdr_data_chunk_t HDR_DATA_CHUNK = {0, 0, 0, 0, 0, 0, 0};
330 static char tempbuf[64];
332 /*----------------------------------------------------------------------
333 * Stuff for writing a PCap file
335 #define PCAP_MAGIC 0xa1b2c3d4
337 /* "libpcap" file header (minus magic number). */
339 guint32 magic; /* magic */
340 guint16 version_major; /* major version number */
341 guint16 version_minor; /* minor version number */
342 guint32 thiszone; /* GMT to local correction */
343 guint32 sigfigs; /* accuracy of timestamps */
344 guint32 snaplen; /* max length of captured packets, in octets */
345 guint32 network; /* data link type */
348 /* "libpcap" record header. */
350 guint32 ts_sec; /* timestamp seconds */
351 guint32 ts_usec; /* timestamp microseconds */
352 guint32 incl_len; /* number of octets of packet saved in file */
353 guint32 orig_len; /* actual length of packet */
356 /* Link-layer type; see net/bpf.h for details */
357 static unsigned long pcap_link_type = 1; /* Default is DLT-EN10MB */
359 /*----------------------------------------------------------------------
360 * Parse a single hex number
361 * Will abort the program if it can't parse the number
362 * Pass in TRUE if this is an offset, FALSE if not
365 parse_num (const char *str, int offset)
370 num = strtoul(str, &c, offset ? offset_base : 16);
372 fprintf(stderr, "FATAL ERROR: Bad hex number? [%s]\n", str);
378 /*----------------------------------------------------------------------
379 * Write this byte into current packet
382 write_byte (const char *str)
386 num = parse_num(str, FALSE);
387 packet_buf[curr_offset] = (unsigned char) num;
389 if (curr_offset >= max_offset) /* packet full */
393 /*----------------------------------------------------------------------
394 * Remove bytes from the current packet
397 unwrite_bytes (unsigned long nbytes)
399 curr_offset -= nbytes;
402 /*----------------------------------------------------------------------
403 * Compute one's complement checksum (from RFC1071)
406 in_checksum (void *buf, unsigned long count)
408 unsigned long sum = 0;
412 /* This is the inner loop */
413 sum += g_ntohs(* (guint16 *) addr);
418 /* Add left-over byte, if any */
420 sum += g_ntohs(* (guint8 *) addr);
422 /* Fold 32-bit sum to 16 bits */
424 sum = (sum & 0xffff) + (sum >> 16);
430 /* The CRC32C code is taken from draft-ietf-tsvwg-sctpcsum-01.txt.
431 * That code is copyrighted by D. Otis and has been modified.
434 #define CRC32C(c,d) (c=(c>>8)^crc_c[(c^(d))&0xFF])
435 static guint32 crc_c[256] =
437 0x00000000L, 0xF26B8303L, 0xE13B70F7L, 0x1350F3F4L,
438 0xC79A971FL, 0x35F1141CL, 0x26A1E7E8L, 0xD4CA64EBL,
439 0x8AD958CFL, 0x78B2DBCCL, 0x6BE22838L, 0x9989AB3BL,
440 0x4D43CFD0L, 0xBF284CD3L, 0xAC78BF27L, 0x5E133C24L,
441 0x105EC76FL, 0xE235446CL, 0xF165B798L, 0x030E349BL,
442 0xD7C45070L, 0x25AFD373L, 0x36FF2087L, 0xC494A384L,
443 0x9A879FA0L, 0x68EC1CA3L, 0x7BBCEF57L, 0x89D76C54L,
444 0x5D1D08BFL, 0xAF768BBCL, 0xBC267848L, 0x4E4DFB4BL,
445 0x20BD8EDEL, 0xD2D60DDDL, 0xC186FE29L, 0x33ED7D2AL,
446 0xE72719C1L, 0x154C9AC2L, 0x061C6936L, 0xF477EA35L,
447 0xAA64D611L, 0x580F5512L, 0x4B5FA6E6L, 0xB93425E5L,
448 0x6DFE410EL, 0x9F95C20DL, 0x8CC531F9L, 0x7EAEB2FAL,
449 0x30E349B1L, 0xC288CAB2L, 0xD1D83946L, 0x23B3BA45L,
450 0xF779DEAEL, 0x05125DADL, 0x1642AE59L, 0xE4292D5AL,
451 0xBA3A117EL, 0x4851927DL, 0x5B016189L, 0xA96AE28AL,
452 0x7DA08661L, 0x8FCB0562L, 0x9C9BF696L, 0x6EF07595L,
453 0x417B1DBCL, 0xB3109EBFL, 0xA0406D4BL, 0x522BEE48L,
454 0x86E18AA3L, 0x748A09A0L, 0x67DAFA54L, 0x95B17957L,
455 0xCBA24573L, 0x39C9C670L, 0x2A993584L, 0xD8F2B687L,
456 0x0C38D26CL, 0xFE53516FL, 0xED03A29BL, 0x1F682198L,
457 0x5125DAD3L, 0xA34E59D0L, 0xB01EAA24L, 0x42752927L,
458 0x96BF4DCCL, 0x64D4CECFL, 0x77843D3BL, 0x85EFBE38L,
459 0xDBFC821CL, 0x2997011FL, 0x3AC7F2EBL, 0xC8AC71E8L,
460 0x1C661503L, 0xEE0D9600L, 0xFD5D65F4L, 0x0F36E6F7L,
461 0x61C69362L, 0x93AD1061L, 0x80FDE395L, 0x72966096L,
462 0xA65C047DL, 0x5437877EL, 0x4767748AL, 0xB50CF789L,
463 0xEB1FCBADL, 0x197448AEL, 0x0A24BB5AL, 0xF84F3859L,
464 0x2C855CB2L, 0xDEEEDFB1L, 0xCDBE2C45L, 0x3FD5AF46L,
465 0x7198540DL, 0x83F3D70EL, 0x90A324FAL, 0x62C8A7F9L,
466 0xB602C312L, 0x44694011L, 0x5739B3E5L, 0xA55230E6L,
467 0xFB410CC2L, 0x092A8FC1L, 0x1A7A7C35L, 0xE811FF36L,
468 0x3CDB9BDDL, 0xCEB018DEL, 0xDDE0EB2AL, 0x2F8B6829L,
469 0x82F63B78L, 0x709DB87BL, 0x63CD4B8FL, 0x91A6C88CL,
470 0x456CAC67L, 0xB7072F64L, 0xA457DC90L, 0x563C5F93L,
471 0x082F63B7L, 0xFA44E0B4L, 0xE9141340L, 0x1B7F9043L,
472 0xCFB5F4A8L, 0x3DDE77ABL, 0x2E8E845FL, 0xDCE5075CL,
473 0x92A8FC17L, 0x60C37F14L, 0x73938CE0L, 0x81F80FE3L,
474 0x55326B08L, 0xA759E80BL, 0xB4091BFFL, 0x466298FCL,
475 0x1871A4D8L, 0xEA1A27DBL, 0xF94AD42FL, 0x0B21572CL,
476 0xDFEB33C7L, 0x2D80B0C4L, 0x3ED04330L, 0xCCBBC033L,
477 0xA24BB5A6L, 0x502036A5L, 0x4370C551L, 0xB11B4652L,
478 0x65D122B9L, 0x97BAA1BAL, 0x84EA524EL, 0x7681D14DL,
479 0x2892ED69L, 0xDAF96E6AL, 0xC9A99D9EL, 0x3BC21E9DL,
480 0xEF087A76L, 0x1D63F975L, 0x0E330A81L, 0xFC588982L,
481 0xB21572C9L, 0x407EF1CAL, 0x532E023EL, 0xA145813DL,
482 0x758FE5D6L, 0x87E466D5L, 0x94B49521L, 0x66DF1622L,
483 0x38CC2A06L, 0xCAA7A905L, 0xD9F75AF1L, 0x2B9CD9F2L,
484 0xFF56BD19L, 0x0D3D3E1AL, 0x1E6DCDEEL, 0xEC064EEDL,
485 0xC38D26C4L, 0x31E6A5C7L, 0x22B65633L, 0xD0DDD530L,
486 0x0417B1DBL, 0xF67C32D8L, 0xE52CC12CL, 0x1747422FL,
487 0x49547E0BL, 0xBB3FFD08L, 0xA86F0EFCL, 0x5A048DFFL,
488 0x8ECEE914L, 0x7CA56A17L, 0x6FF599E3L, 0x9D9E1AE0L,
489 0xD3D3E1ABL, 0x21B862A8L, 0x32E8915CL, 0xC083125FL,
490 0x144976B4L, 0xE622F5B7L, 0xF5720643L, 0x07198540L,
491 0x590AB964L, 0xAB613A67L, 0xB831C993L, 0x4A5A4A90L,
492 0x9E902E7BL, 0x6CFBAD78L, 0x7FAB5E8CL, 0x8DC0DD8FL,
493 0xE330A81AL, 0x115B2B19L, 0x020BD8EDL, 0xF0605BEEL,
494 0x24AA3F05L, 0xD6C1BC06L, 0xC5914FF2L, 0x37FACCF1L,
495 0x69E9F0D5L, 0x9B8273D6L, 0x88D28022L, 0x7AB90321L,
496 0xAE7367CAL, 0x5C18E4C9L, 0x4F48173DL, 0xBD23943EL,
497 0xF36E6F75L, 0x0105EC76L, 0x12551F82L, 0xE03E9C81L,
498 0x34F4F86AL, 0xC69F7B69L, 0xD5CF889DL, 0x27A40B9EL,
499 0x79B737BAL, 0x8BDCB4B9L, 0x988C474DL, 0x6AE7C44EL,
500 0xBE2DA0A5L, 0x4C4623A6L, 0x5F16D052L, 0xAD7D5351L,
504 crc32c(const guint8* buf, unsigned int len, guint32 crc32_init)
510 for (i = 0; i < len; i++)
511 CRC32C(crc32, buf[i]);
517 finalize_crc32c(guint32 crc32)
520 guint8 byte0,byte1,byte2,byte3;
523 byte0 = result & 0xff;
524 byte1 = (result>>8) & 0xff;
525 byte2 = (result>>16) & 0xff;
526 byte3 = (result>>24) & 0xff;
527 result = ((byte0 << 24) | (byte1 << 16) | (byte2 << 8) | byte3);
532 number_of_padding_bytes (unsigned long length)
534 unsigned long remainder;
536 remainder = length % 4;
541 return 4 - remainder;
544 /*----------------------------------------------------------------------
545 * Write current packet out
548 write_current_packet (void)
551 int proto_length = 0;
553 int eth_trailer_length = 0;
554 int i, padding_length;
556 struct pcaprec_hdr ph;
558 if (curr_offset > 0) {
559 /* Write the packet */
561 /* Compute packet length */
562 length = curr_offset;
563 if (hdr_data_chunk) { length += sizeof(HDR_DATA_CHUNK) + number_of_padding_bytes(curr_offset); }
564 if (hdr_sctp) { length += sizeof(HDR_SCTP); }
565 if (hdr_udp) { length += sizeof(HDR_UDP); proto_length = length; }
566 if (hdr_tcp) { length += sizeof(HDR_TCP); proto_length = length; }
567 if (hdr_ip) { length += sizeof(HDR_IP); ip_length = length; }
569 length += sizeof(HDR_ETHERNET);
572 eth_trailer_length = 60 - length;
577 /* Write PCAP header */
578 ph.ts_sec = (guint32)ts_sec;
579 ph.ts_usec = ts_usec;
580 if (ts_fmt == NULL) { ts_usec++; } /* fake packet counter */
581 ph.incl_len = length;
582 ph.orig_len = length;
583 fwrite(&ph, sizeof(ph), 1, output_file);
585 /* Write Ethernet header */
587 HDR_ETHERNET.l3pid = g_htons(hdr_ethernet_proto);
588 fwrite(&HDR_ETHERNET, sizeof(HDR_ETHERNET), 1, output_file);
591 /* Write IP header */
593 HDR_IP.packet_length = g_htons(ip_length);
594 HDR_IP.protocol = (guint8) hdr_ip_proto;
595 HDR_IP.hdr_checksum = 0;
596 HDR_IP.hdr_checksum = in_checksum(&HDR_IP, sizeof(HDR_IP));
597 fwrite(&HDR_IP, sizeof(HDR_IP), 1, output_file);
600 /* initialize pseudo header for checksum calculation */
601 pseudoh.src_addr = HDR_IP.src_addr;
602 pseudoh.dest_addr = HDR_IP.dest_addr;
604 pseudoh.protocol = (guint8) hdr_ip_proto;
605 pseudoh.length = g_htons(proto_length);
607 /* Write UDP header */
610 HDR_UDP.source_port = g_htons(hdr_src_port);
611 HDR_UDP.dest_port = g_htons(hdr_dest_port);
612 HDR_UDP.length = g_htons(proto_length);
614 /* Note: g_ntohs()/g_htons() macro arg may be eval'd twice so calc value before invoking macro */
615 HDR_UDP.checksum = 0;
616 x16 = in_checksum(&pseudoh, sizeof(pseudoh));
618 x16 = in_checksum(&HDR_UDP, sizeof(HDR_UDP));
620 x16 = in_checksum(packet_buf, curr_offset);
622 x16 = (u & 0xffff) + (u>>16);
623 HDR_UDP.checksum = g_htons(x16);
624 if (HDR_UDP.checksum == 0) /* differentiate between 'none' and 0 */
625 HDR_UDP.checksum = g_htons(1);
627 fwrite(&HDR_UDP, sizeof(HDR_UDP), 1, output_file);
630 /* Write TCP header */
633 HDR_TCP.source_port = g_htons(hdr_src_port);
634 HDR_TCP.dest_port = g_htons(hdr_dest_port);
635 /* HDR_TCP.seq_num already correct */
636 HDR_TCP.window = g_htons(0x2000);
638 /* Note: g_ntohs()/g_htons() macro arg may be eval'd twice so calc value before invoking macro */
639 HDR_TCP.checksum = 0;
640 x16 = in_checksum(&pseudoh, sizeof(pseudoh));
642 x16 = in_checksum(&HDR_TCP, sizeof(HDR_TCP));
644 x16 = in_checksum(packet_buf, curr_offset);
646 x16 = (u & 0xffff) + (u>>16);
647 HDR_TCP.checksum = g_htons(x16);
648 if (HDR_TCP.checksum == 0) /* differentiate between 'none' and 0 */
649 HDR_TCP.checksum = g_htons(1);
651 fwrite(&HDR_TCP, sizeof(HDR_TCP), 1, output_file);
654 /* Compute DATA chunk header and append padding */
655 if (hdr_data_chunk) {
656 HDR_DATA_CHUNK.type = hdr_data_chunk_type;
657 HDR_DATA_CHUNK.bits = hdr_data_chunk_bits;
658 HDR_DATA_CHUNK.length = g_htons(curr_offset + sizeof(HDR_DATA_CHUNK));
659 HDR_DATA_CHUNK.tsn = g_htonl(hdr_data_chunk_tsn);
660 HDR_DATA_CHUNK.sid = g_htons(hdr_data_chunk_sid);
661 HDR_DATA_CHUNK.ssn = g_htons(hdr_data_chunk_ssn);
662 HDR_DATA_CHUNK.ppid = g_htonl(hdr_data_chunk_ppid);
664 padding_length = number_of_padding_bytes(curr_offset);
665 for (i=0; i<padding_length; i++)
669 /* Write SCTP header */
672 HDR_SCTP.src_port = g_htons(hdr_sctp_src);
673 HDR_SCTP.dest_port = g_htons(hdr_sctp_dest);
674 HDR_SCTP.tag = g_htonl(hdr_sctp_tag);
675 HDR_SCTP.checksum = g_htonl(0);
676 HDR_SCTP.checksum = crc32c((guint8 *)&HDR_SCTP, sizeof(HDR_SCTP), ~0L);
678 HDR_SCTP.checksum = crc32c((guint8 *)&HDR_DATA_CHUNK, sizeof(HDR_DATA_CHUNK), HDR_SCTP.checksum);
679 /* Note: g_ntohl() macro arg may be eval'd twice so calc value before invoking macro */
680 x32 = finalize_crc32c(crc32c(packet_buf, curr_offset, HDR_SCTP.checksum));
681 HDR_SCTP.checksum = g_htonl(x32);
683 fwrite(&HDR_SCTP, sizeof(HDR_SCTP), 1, output_file);
686 /* Write DATA chunk header */
687 if (hdr_data_chunk) {
688 fwrite(&HDR_DATA_CHUNK, sizeof(HDR_DATA_CHUNK), 1, output_file);
691 fwrite(packet_buf, curr_offset, 1, output_file);
693 /* Write Ethernet trailer */
694 if (hdr_ethernet && eth_trailer_length > 0) {
695 memset(tempbuf, 0, eth_trailer_length);
696 fwrite(tempbuf, eth_trailer_length, 1, output_file);
700 fprintf(stderr, "Wrote packet of %lu bytes at %u\n", curr_offset, g_ntohl(HDR_TCP.seq_num));
701 num_packets_written ++;
703 HDR_TCP.seq_num = g_ntohl(HDR_TCP.seq_num) + curr_offset;
704 HDR_TCP.seq_num = g_htonl(HDR_TCP.seq_num);
706 packet_start += curr_offset;
710 /*----------------------------------------------------------------------
711 * Write the PCap file header
714 write_file_header (void)
718 fh.magic = PCAP_MAGIC;
719 fh.version_major = 2;
720 fh.version_minor = 4;
724 fh.network = pcap_link_type;
726 fwrite(&fh, sizeof(fh), 1, output_file);
729 /*----------------------------------------------------------------------
730 * Append a token to the packet preamble.
733 append_to_preamble(char *str)
737 if (packet_preamble_len != 0) {
738 if (packet_preamble_len == PACKET_PREAMBLE_MAX_LEN)
739 return; /* no room to add more preamble */
740 /* Add a blank separator between the previous token and this token. */
741 packet_preamble[packet_preamble_len++] = ' ';
743 toklen = strlen(str);
745 if (packet_preamble_len + toklen > PACKET_PREAMBLE_MAX_LEN)
746 return; /* no room to add the token to the preamble */
747 g_strlcpy(&packet_preamble[packet_preamble_len], str, PACKET_PREAMBLE_MAX_LEN);
748 packet_preamble_len += (int) toklen;
751 char xs[PACKET_PREAMBLE_MAX_LEN];
752 g_strlcpy(xs, packet_preamble, PACKET_PREAMBLE_MAX_LEN);
753 while ((c = strchr(xs, '\r')) != NULL) *c=' ';
754 fprintf (stderr, "[[append_to_preamble: \"%s\"]]", xs);
759 /*----------------------------------------------------------------------
760 * Parse the preamble to get the timecode.
764 parse_preamble (void)
773 * If no "-t" flag was specified, don't attempt to parse a packet
774 * preamble to extract a time stamp.
780 * Initialize to today localtime, just in case not all fields
781 * of the date and time are specified.
784 timecode = timecode_default;
788 * Null-terminate the preamble.
790 packet_preamble[packet_preamble_len] = '\0';
792 /* Ensure preamble has more than two chars before atempting to parse.
793 * This should cover line breaks etc that get counted.
795 if ( strlen(packet_preamble) > 2 ) {
796 /* Get Time leaving subseconds */
797 subsecs = strptime( packet_preamble, ts_fmt, &timecode );
798 if (subsecs != NULL) {
799 /* Get the long time from the tm structure */
800 /* (will return -1 if failure) */
801 ts_sec = mktime( &timecode );
803 ts_sec = -1; /* we failed to parse it */
805 /* This will ensure incorrectly parsed dates get set to zero */
808 /* Sanitize - remove all '\r' */
810 while ((c = strchr(packet_preamble, '\r')) != NULL) *c=' ';
811 fprintf (stderr, "Failure processing time \"%s\" using time format \"%s\"\n (defaulting to Jan 1,1970 00:00:00 GMT)\n",
812 packet_preamble, ts_fmt);
814 fprintf(stderr, "timecode: %02d/%02d/%d %02d:%02d:%02d %d\n",
815 timecode.tm_mday, timecode.tm_mon, timecode.tm_year,
816 timecode.tm_hour, timecode.tm_min, timecode.tm_sec, timecode.tm_isdst);
818 ts_sec = 0; /* Jan 1,1970: 00:00 GMT; tshark/wireshark will display date/time as adjusted by timezone */
823 /* Parse subseconds */
824 ts_usec = strtol(subsecs, &p, 10);
830 * Convert that number to a number
831 * of microseconds; if it's N digits
832 * long, it's in units of 10^(-N) seconds,
833 * so, to convert it to units of
834 * 10^-6 seconds, we multiply by
837 subseclen = (int) (p - subsecs);
840 * *More* than 6 digits; 6-N is
841 * negative, so we divide by
844 for (i = subseclen - 6; i != 0; i--)
846 } else if (subseclen < 6) {
847 for (i = 6 - subseclen; i != 0; i--)
855 while ((c = strchr(packet_preamble, '\r')) != NULL) *c=' ';
856 fprintf(stderr, "[[parse_preamble: \"%s\"]]\n", packet_preamble);
857 fprintf(stderr, "Format(%s), time(%u), subsecs(%u)\n", ts_fmt, (guint32)ts_sec, ts_usec);
862 packet_preamble_len = 0;
865 /*----------------------------------------------------------------------
869 start_new_packet (void)
872 fprintf(stderr, "Start new packet\n");
874 /* Write out the current packet, if required */
875 write_current_packet();
878 /* Ensure we parse the packet preamble as it may contain the time */
882 /*----------------------------------------------------------------------
883 * Process a directive
886 process_directive (char *str)
888 fprintf(stderr, "\n--- Directive [%s] currently unsupported ---\n", str+10);
892 /*----------------------------------------------------------------------
893 * Parse a single token (called from the scanner)
896 parse_token (token_t token, char *str)
901 * This is implemented as a simple state machine of five states.
902 * State transitions are caused by tokens being received from the
903 * scanner. The code should be self_documenting.
907 /* Sanitize - remove all '\r' */
909 if (str!=NULL) { while ((c = strchr(str, '\r')) != NULL) *c=' '; }
911 fprintf(stderr, "(%s, %s \"%s\") -> (",
912 state_str[state], token_str[token], str ? str : "");
917 /* ----- Waiting for new packet -------------------------------------------*/
921 append_to_preamble(str);
924 process_directive(str);
927 num = parse_num(str, TRUE);
929 /* New packet starts here */
939 /* ----- Processing packet, start of new line -----------------------------*/
943 append_to_preamble(str);
946 process_directive(str);
949 num = parse_num(str, TRUE);
951 /* New packet starts here */
955 } else if ((num - packet_start) != curr_offset) {
957 * The offset we read isn't the one we expected.
958 * This may only mean that we mistakenly interpreted
959 * some text as byte values (e.g., if the text dump
960 * of packet data included a number with spaces around
961 * it). If the offset is less than what we expected,
962 * assume that's the problem, and throw away the putative
965 if (num < curr_offset) {
966 unwrite_bytes(curr_offset - num);
969 /* Bad offset; switch to INIT state */
971 fprintf(stderr, "Inconsistent offset. Expecting %0lX, got %0lX. Ignoring rest of packet\n",
973 write_current_packet();
984 /* ----- Processing packet, read offset -----------------------------------*/
988 /* Record the byte */
998 state = START_OF_LINE;
1005 /* ----- Processing packet, read byte -------------------------------------*/
1009 /* Record the byte */
1018 state = START_OF_LINE;
1025 /* ----- Processing packet, read text -------------------------------------*/
1029 state = START_OF_LINE;
1037 fprintf(stderr, "FATAL ERROR: Bad state (%d)", state);
1042 fprintf(stderr, ", %s)\n", state_str[state]);
1046 /*----------------------------------------------------------------------
1047 * Print usage string and exit
1055 " (" SVNVERSION " from " SVNPATH ")"
1058 "Generate a capture file from an ASCII hexdump of packets.\n"
1059 "See http://www.wireshark.org for more information.\n"
1061 "Usage: text2pcap [options] <infile> <outfile>\n"
1063 "where <infile> specifies input filename (use - for standard input)\n"
1064 " <outfile> specifies output filename (use - for standard output)\n"
1067 " -o hex|oct|dec parse offsets as (h)ex, (o)ctal or (d)ecimal; default is hex.\n"
1068 " -t <timefmt> treat the text before the packet as a date/time code;\n"
1069 " the specified argument is a format string of the sort\n"
1070 " supported by strptime.\n"
1071 " Example: The time \"10:15:14.5476\" has the format code\n"
1072 " \"%%H:%%M:%%S.\"\n"
1073 " NOTE: The subsecond component delimiter must be given\n"
1074 " (.) but no pattern is required; the remaining number\n"
1075 " is assumed to be fractions of a second.\n"
1076 " NOTE: Date/time fields from the current date/time are\n"
1077 " used as the default for unspecified fields.\n"
1080 " -l <typenum> link-layer type number; default is 1 (Ethernet).\n"
1081 " See the file net/bpf.h for list of numbers.\n"
1082 " Use this option if your dump is a complete hex dump\n"
1083 " of an encapsulated packet and you wish to specify\n"
1084 " the exact type of encapsulation.\n"
1085 " Example: -l 7 for ARCNet packets.\n"
1086 " -m <max-packet> max packet length in output; default is %d\n"
1088 "Prepend dummy header:\n"
1089 " -e <l3pid> prepend dummy Ethernet II header with specified L3PID\n"
1091 " Example: -e 0x806 to specify an ARP packet.\n"
1092 " -i <proto> prepend dummy IP header with specified IP protocol\n"
1094 " Automatically prepends Ethernet header as well.\n"
1096 " -u <srcp>,<destp> prepend dummy UDP header with specified\n"
1097 " dest and source ports (in DECIMAL).\n"
1098 " Automatically prepends Ethernet & IP headers as well.\n"
1099 " Example: -u 1000 69 to make the packets look like TFTP/UDP packets.\n"
1100 " -T <srcp>,<destp> prepend dummy TCP header with specified\n"
1101 " dest and source ports (in DECIMAL).\n"
1102 " Automatically prepends Ethernet & IP headers as well.\n"
1103 " Example: -T 50,60\n"
1104 " -s <srcp>,<dstp>,<tag> prepend dummy SCTP header with specified\n"
1105 " dest/source ports and verification tag (in DECIMAL).\n"
1106 " Automatically prepends Ethernet & IP headers as well.\n"
1107 " Example: -s 30,40,34\n"
1108 " -S <srcp>,<dstp>,<ppi> prepend dummy SCTP header with specified\n"
1109 " dest/source ports and verification tag 0.\n"
1110 " Automatically prepends a dummy SCTP DATA\n"
1111 " chunk header with payload protocol identifier ppi.\n"
1112 " Example: -S 30,40,34\n"
1115 " -h display this help and exit.\n"
1116 " -d show detailed debug of parser states.\n"
1117 " -q generate no output at all (automatically turns off -d).\n"
1119 VERSION, MAX_PACKET);
1124 /*----------------------------------------------------------------------
1128 parse_options (int argc, char *argv[])
1138 /* Convert our arg list to UTF-8. */
1139 wc_argv = CommandLineToArgvW(GetCommandLineW(), &wc_argc);
1140 if (wc_argv && wc_argc == argc) {
1141 for (i = 0; i < argc; i++) {
1142 argv[i] = g_utf16_to_utf8(wc_argv[i], -1, NULL, NULL, NULL);
1144 } /* XXX else bail because something is horribly, horribly wrong? */
1147 /* Scan CLI parameters */
1148 while ((c = getopt(argc, argv, "dhqe:i:l:m:o:u:s:S:t:T:")) != -1) {
1150 case '?': usage(); break;
1151 case 'h': usage(); break;
1152 case 'd': if (!quiet) debug++; break;
1153 case 'q': quiet = TRUE; debug = FALSE; break;
1154 case 'l': pcap_link_type = strtol(optarg, NULL, 0); break;
1155 case 'm': max_offset = strtol(optarg, NULL, 0); break;
1157 if (optarg[0]!='h' && optarg[0] != 'o' && optarg[0] != 'd') {
1158 fprintf(stderr, "Bad argument for '-o': %s\n", optarg);
1162 case 'o': offset_base = 8; break;
1163 case 'h': offset_base = 16; break;
1164 case 'd': offset_base = 10; break;
1168 hdr_ethernet = TRUE;
1169 if (sscanf(optarg, "%lx", &hdr_ethernet_proto) < 1) {
1170 fprintf(stderr, "Bad argument for '-e': %s\n", optarg);
1177 hdr_ip_proto = strtol(optarg, &p, 10);
1178 if (p == optarg || *p != '\0' || hdr_ip_proto < 0 ||
1179 hdr_ip_proto > 255) {
1180 fprintf(stderr, "Bad argument for '-i': %s\n", optarg);
1183 hdr_ethernet = TRUE;
1184 hdr_ethernet_proto = 0x800;
1189 hdr_sctp_src = strtol(optarg, &p, 10);
1190 if (p == optarg || (*p != ',' && *p != '\0')) {
1191 fprintf(stderr, "Bad src port for '-%c'\n", c);
1195 fprintf(stderr, "No dest port specified for '-%c'\n", c);
1200 hdr_sctp_dest = strtol(optarg, &p, 10);
1201 if (p == optarg || (*p != ',' && *p != '\0')) {
1202 fprintf(stderr, "Bad dest port for '-s'\n");
1206 fprintf(stderr, "No tag specified for '-%c'\n", c);
1211 hdr_sctp_tag = strtol(optarg, &p, 10);
1212 if (p == optarg || *p != '\0') {
1213 fprintf(stderr, "Bad tag for '-%c'\n", c);
1219 hdr_ethernet = TRUE;
1220 hdr_ethernet_proto = 0x800;
1224 hdr_data_chunk = TRUE;
1225 hdr_sctp_src = strtol(optarg, &p, 10);
1226 if (p == optarg || (*p != ',' && *p != '\0')) {
1227 fprintf(stderr, "Bad src port for '-%c'\n", c);
1231 fprintf(stderr, "No dest port specified for '-%c'\n", c);
1236 hdr_sctp_dest = strtol(optarg, &p, 10);
1237 if (p == optarg || (*p != ',' && *p != '\0')) {
1238 fprintf(stderr, "Bad dest port for '-s'\n");
1242 fprintf(stderr, "No ppi specified for '-%c'\n", c);
1247 hdr_data_chunk_ppid = strtoul(optarg, &p, 10);
1248 if (p == optarg || *p != '\0') {
1249 fprintf(stderr, "Bad ppi for '-%c'\n", c);
1255 hdr_ethernet = TRUE;
1256 hdr_ethernet_proto = 0x800;
1266 hdr_src_port = strtol(optarg, &p, 10);
1267 if (p == optarg || (*p != ',' && *p != '\0')) {
1268 fprintf(stderr, "Bad src port for '-u'\n");
1272 fprintf(stderr, "No dest port specified for '-u'\n");
1277 hdr_dest_port = strtol(optarg, &p, 10);
1278 if (p == optarg || *p != '\0') {
1279 fprintf(stderr, "Bad dest port for '-u'\n");
1284 hdr_ethernet = TRUE;
1285 hdr_ethernet_proto = 0x800;
1291 hdr_src_port = strtol(optarg, &p, 10);
1292 if (p == optarg || (*p != ',' && *p != '\0')) {
1293 fprintf(stderr, "Bad src port for '-T'\n");
1297 fprintf(stderr, "No dest port specified for '-u'\n");
1302 hdr_dest_port = strtol(optarg, &p, 10);
1303 if (p == optarg || *p != '\0') {
1304 fprintf(stderr, "Bad dest port for '-T'\n");
1309 hdr_ethernet = TRUE;
1310 hdr_ethernet_proto = 0x800;
1318 if (optind >= argc || argc-optind < 2) {
1319 fprintf(stderr, "Must specify input and output filename\n");
1323 if (strcmp(argv[optind], "-")) {
1324 input_filename = g_strdup(argv[optind]);
1325 input_file = ws_fopen(input_filename, "rb");
1327 fprintf(stderr, "Cannot open file [%s] for reading: %s\n",
1328 input_filename, strerror(errno));
1332 input_filename = "Standard input";
1336 if (strcmp(argv[optind+1], "-")) {
1337 output_filename = g_strdup(argv[optind+1]);
1338 output_file = ws_fopen(output_filename, "wb");
1340 fprintf(stderr, "Cannot open file [%s] for writing: %s\n",
1341 output_filename, strerror(errno));
1345 output_filename = "Standard output";
1346 output_file = stdout;
1349 /* Some validation */
1350 if (pcap_link_type != 1 && hdr_ethernet) {
1351 fprintf(stderr, "Dummy headers (-e, -i, -u, -s, -S -T) cannot be specified with link type override (-l)\n");
1355 /* Set up our variables */
1358 input_filename = "Standard input";
1361 output_file = stdout;
1362 output_filename = "Standard output";
1365 ts_sec = time(0); /* initialize to current time */
1366 timecode_default = *localtime(&ts_sec);
1367 timecode_default.tm_isdst = -1; /* Unknown for now, depends on time given to the strptime() function */
1369 /* Display summary of our state */
1371 fprintf(stderr, "Input from: %s\n", input_filename);
1372 fprintf(stderr, "Output to: %s\n", output_filename);
1374 if (hdr_ethernet) fprintf(stderr, "Generate dummy Ethernet header: Protocol: 0x%0lX\n",
1375 hdr_ethernet_proto);
1376 if (hdr_ip) fprintf(stderr, "Generate dummy IP header: Protocol: %ld\n",
1378 if (hdr_udp) fprintf(stderr, "Generate dummy UDP header: Source port: %ld. Dest port: %ld\n",
1379 hdr_src_port, hdr_dest_port);
1380 if (hdr_tcp) fprintf(stderr, "Generate dummy TCP header: Source port: %ld. Dest port: %ld\n",
1381 hdr_src_port, hdr_dest_port);
1382 if (hdr_sctp) fprintf(stderr, "Generate dummy SCTP header: Source port: %ld. Dest port: %ld. Tag: %ld\n",
1383 hdr_sctp_src, hdr_sctp_dest, hdr_sctp_tag);
1384 if (hdr_data_chunk) fprintf(stderr, "Generate dummy DATA chunk header: TSN: %lu. SID: %d. SSN: %d. PPID: %lu\n",
1385 hdr_data_chunk_tsn, hdr_data_chunk_sid, hdr_data_chunk_ssn, hdr_data_chunk_ppid);
1390 main(int argc, char *argv[])
1392 parse_options(argc, argv);
1394 assert(input_file != NULL);
1395 assert(output_file != NULL);
1397 write_file_header();
1402 write_current_packet();
1404 fprintf(stderr, "\n-------------------------\n");
1406 fprintf(stderr, "Read %ld potential packet%s, wrote %ld packet%s\n",
1407 num_packets_read, (num_packets_read==1) ?"":"s",
1408 num_packets_written, (num_packets_written==1)?"":"s");