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.
32 #include "file_wrappers.h"
35 #include "catapult_dct2000.h"
37 #define MAX_FIRST_LINE_LENGTH 200
38 #define MAX_TIMESTAMP_LINE_LENGTH 100
39 #define MAX_LINE_LENGTH 32000
40 #define MAX_SECONDS_CHARS 16
41 #define MAX_SUBSECOND_DECIMALS 4
42 #define MAX_CONTEXT_NAME 64
43 #define MAX_PROTOCOL_NAME 64
44 #define MAX_PORT_DIGITS 2
45 #define MAX_VARIANT_DIGITS 32
46 #define MAX_OUTHDR_NAME 64
47 #define AAL_HEADER_CHARS 12
50 - support for FP over AAL0
51 - support for IuR interface FP
55 /* 's' or 'r' of a packet as read from .out file */
56 typedef enum packet_direction_t
66 gchar *after_time; /* If NULL assume " l " */
69 /*******************************************************************/
70 /* Information stored external to a file (wtap) needed for dumping */
71 typedef struct dct2000_file_externals
73 /* Buffer to hold first line, including magic and format number */
74 gchar firstline[MAX_FIRST_LINE_LENGTH];
75 gint firstline_length;
77 /* Buffer to hold second line with formatted file creation data/time */
78 gchar secondline[MAX_TIMESTAMP_LINE_LENGTH];
79 gint secondline_length;
81 /* Hash table to store text prefix data part of displayed packets.
82 Records (file offset -> pre-data-prefix-string)
83 N.B. This is only needed for dumping
85 GHashTable *packet_prefix_table;
86 } dct2000_file_externals_t;
88 /* This global table maps wtap -> file_external structs */
89 static GHashTable *file_externals_table = NULL;
92 /***********************************************************/
93 /* Transient data used for parsing */
95 /* Buffer to hold a single text line read from the file */
96 static gchar linebuff[MAX_LINE_LENGTH];
98 /* Buffer for separate AAL header */
99 static gchar aal_header_chars[AAL_HEADER_CHARS];
101 /* 'Magic number' at start of Catapult DCT2000 .out files. */
102 static const gchar catapult_dct2000_magic[] = "Session Transcript";
104 /* Context name + port that the packet was captured at */
105 static gchar context_name[MAX_CONTEXT_NAME];
106 static guint8 context_port;
108 /* The DCT2000 protocol name of the packet, plus variant number */
109 static gchar protocol_name[MAX_PROTOCOL_NAME+1];
110 static gchar variant_name[MAX_VARIANT_DIGITS+1];
111 static gchar outhdr_name[MAX_OUTHDR_NAME+1];
114 /************************************************************/
115 /* Functions called from wiretap */
116 static gboolean catapult_dct2000_read(wtap *wth, int *err, gchar **err_info,
117 gint64 *data_offset);
118 static gboolean catapult_dct2000_seek_read(wtap *wth, gint64 seek_off,
119 union wtap_pseudo_header *pseudo_header,
120 guchar *pd, int length,
121 int *err, gchar **err_info);
122 static void catapult_dct2000_close(wtap *wth);
124 static gboolean catapult_dct2000_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
125 const union wtap_pseudo_header *pseudo_header,
126 const guchar *pd, int *err);
127 static gboolean catapult_dct2000_dump_close(wtap_dumper *wdh, int *err);
130 /************************************************************/
131 /* Private helper functions */
132 static gboolean read_new_line(FILE_T fh, gint64 *offset, gint *length);
133 static gboolean parse_line(gint line_length, gint *seconds, gint *useconds,
134 long *before_time_offset, long *after_time_offset,
137 packet_direction_t *direction,
139 static int write_stub_header(guchar *frame_buffer, char *timestamp_string,
140 packet_direction_t direction, int encap);
141 static guchar hex_from_char(gchar c);
142 static gchar char_from_hex(guchar hex);
144 static void set_pseudo_header_info(wtap *wth,
147 union wtap_pseudo_header *pseudo_header,
148 packet_direction_t direction);
149 static void set_aal_info(union wtap_pseudo_header *pseudo_header,
150 packet_direction_t direction);
151 static void set_isdn_info(union wtap_pseudo_header *pseudo_header,
152 packet_direction_t direction);
153 static void set_ppp_info(union wtap_pseudo_header *pseudo_header,
154 packet_direction_t direction);
156 static gint wth_equal(gconstpointer v, gconstpointer v2);
157 static guint wth_hash_func(gconstpointer v);
158 static gint packet_offset_equal(gconstpointer v, gconstpointer v2);
159 static guint packet_offset_hash_func(gconstpointer v);
161 static gboolean get_file_time_stamp(time_t *secs, guint32 *usecs);
162 static gboolean free_line_prefix_info(gpointer key, gpointer value, gpointer user_data);
166 /********************************************/
168 /********************************************/
169 int catapult_dct2000_open(wtap *wth, int *err, gchar **err_info _U_)
174 gint firstline_length;
175 dct2000_file_externals_t *file_externals;
177 /* Clear errno before reading from the file */
181 /*********************************************************************/
182 /* Need entry in file_externals table */
184 /* Create file externals table if it doesn't yet exist */
185 if (file_externals_table == NULL)
187 file_externals_table = g_hash_table_new(wth_hash_func, wth_equal);
191 /********************************************************************/
192 /* First line needs to contain at least as many characters as magic */
194 read_new_line(wth->fh, &offset, &firstline_length);
195 if (((size_t)firstline_length < strlen(catapult_dct2000_magic)) ||
196 firstline_length >= MAX_FIRST_LINE_LENGTH)
201 /* This file is not for us if it doesn't match our signature */
202 if (memcmp(catapult_dct2000_magic, linebuff, strlen(catapult_dct2000_magic)) != 0)
208 /* Allocate a new file_externals structure */
209 file_externals = g_malloc(sizeof(dct2000_file_externals_t));
210 memset((void*)file_externals, '\0', sizeof(dct2000_file_externals_t));
212 /* Copy this first line into buffer so could write out later */
213 strncpy(file_externals->firstline, linebuff, firstline_length);
214 file_externals->firstline_length = firstline_length;
217 /***********************************************************/
218 /* Second line contains file timestamp */
219 /* Store this offset in in wth->capture->catapult_dct2000 */
221 read_new_line(wth->fh, &offset, &(file_externals->secondline_length));
222 if ((file_externals->secondline_length >= MAX_TIMESTAMP_LINE_LENGTH) ||
223 (!get_file_time_stamp(×tamp, &usecs)))
225 /* Give up if file time line wasn't valid */
226 g_free(file_externals);
230 wth->capture.catapult_dct2000 = g_malloc(sizeof(catapult_dct2000_t));
231 wth->capture.catapult_dct2000->start_secs = timestamp;
232 wth->capture.catapult_dct2000->start_usecs = usecs;
234 /* Copy this second line into buffer so could write out later */
235 strncpy(file_externals->secondline, linebuff, file_externals->secondline_length);
238 /************************************************************/
239 /* File is for us. Fill in details so packets can be read */
241 /* Set our file type */
242 wth->file_type = WTAP_FILE_CATAPULT_DCT2000;
244 /* Use our own encapsulation to send all packets to our stub dissector */
245 wth->file_encap = WTAP_ENCAP_CATAPULT_DCT2000;
247 /* Callbacks for reading operations */
248 wth->subtype_read = catapult_dct2000_read;
249 wth->subtype_seek_read = catapult_dct2000_seek_read;
250 wth->subtype_close = catapult_dct2000_close;
252 /* Choose microseconds (have 4 decimal places...) */
253 wth->tsprecision = WTAP_FILE_TSPREC_USEC;
256 /***************************************************************/
257 /* Initialise packet_prefix_table (index is offset into file) */
258 file_externals->packet_prefix_table =
259 g_hash_table_new(packet_offset_hash_func, packet_offset_equal);
261 /* Add file_externals for this wtap into the global table */
262 g_hash_table_insert(file_externals_table,
263 (void*)wth, (void*)file_externals);
270 /**************************************************/
272 /* Look for and read the next usable packet */
273 /* - return TRUE and details if found */
274 /**************************************************/
275 gboolean catapult_dct2000_read(wtap *wth, int *err, gchar **err_info _U_,
278 gint64 offset = wth->data_offset;
279 long dollar_offset, before_time_offset, after_time_offset;
280 packet_direction_t direction;
283 /* Find wtap external structure for this wtap */
284 dct2000_file_externals_t *file_externals =
285 (dct2000_file_externals_t*)g_hash_table_lookup(file_externals_table, wth);
287 /* There *has* to be an entry for this wth */
293 /* Search for a line containing a usable message */
296 int line_length, seconds, useconds, data_chars;
297 gint64 this_offset = offset;
299 /* Are looking for first packet after 2nd line */
300 if (wth->data_offset == 0)
302 this_offset += (file_externals->firstline_length+1+
303 file_externals->secondline_length+1);
306 /* Clear errno before reading from the file */
309 /* Read a new line from file into linebuff */
310 if (read_new_line(wth->fh, &offset, &line_length) == FALSE)
312 /* Get out when no more lines to be read */
316 /* Try to parse the line as a message */
317 if (parse_line(line_length, &seconds, &useconds,
318 &before_time_offset, &after_time_offset,
320 &data_chars, &direction, &encap))
322 guchar *frame_buffer;
325 line_prefix_info_t *line_prefix_info;
326 char timestamp_string[32];
329 sprintf(timestamp_string, "%d.%04d", seconds, useconds/100);
331 /* All packets go to Catapult DCT2000 stub dissector */
332 wth->phdr.pkt_encap = WTAP_ENCAP_CATAPULT_DCT2000;
334 /* Set data_offset to the beginning of the line we're returning.
335 This will be the seek_off parameter when this frame is re-read.
337 *data_offset = this_offset;
339 /* This is the position in the file where the next _read() will be called from */
340 wth->data_offset = this_offset + line_length + 1;
342 /* Fill in timestamp (capture base + packet offset) */
343 wth->phdr.ts.secs = wth->capture.catapult_dct2000->start_secs + seconds;
344 if ((wth->capture.catapult_dct2000->start_usecs + useconds) >= 1000000)
349 ((wth->capture.catapult_dct2000->start_usecs + useconds) % 1000000) *1000;
351 /* Get buffer pointer ready */
352 buffer_assure_space(wth->frame_buffer,
353 strlen(context_name)+1 + /* Context name */
355 strlen(timestamp_string)+1 + /* timestamp */
356 strlen(variant_name)+1 + /* variant */
357 strlen(outhdr_name)+1 + /* outhdr */
358 strlen(protocol_name)+1 + /* Protocol name */
362 frame_buffer = buffer_start_ptr(wth->frame_buffer);
365 /*********************/
366 /* Write stub header */
367 stub_offset = write_stub_header(frame_buffer, timestamp_string,
370 /* Binary data length is half bytestring length + stub header */
371 wth->phdr.len = data_chars/2 + stub_offset;
372 wth->phdr.caplen = data_chars/2 + stub_offset;
375 /*************************/
376 /* Copy data into buffer */
377 for (n=0; n <= data_chars; n+=2)
379 frame_buffer[stub_offset + n/2] =
380 (hex_from_char(linebuff[dollar_offset+n]) << 4) |
381 hex_from_char(linebuff[dollar_offset+n+1]);
384 /* Store the packet prefix in the hash table */
385 line_prefix_info = g_malloc(sizeof(line_prefix_info_t));
387 /* Create and use buffer for contents before time */
388 line_prefix_info->before_time = g_malloc(before_time_offset+1);
389 strncpy(line_prefix_info->before_time, linebuff, before_time_offset);
390 line_prefix_info->before_time[before_time_offset] = '\0';
392 /* Create and use buffer for contents before time.
393 Do this only if it doesn't correspond to " l ", which is by far the most
395 if (((size_t)(dollar_offset - after_time_offset -1) == strlen(" l ")) &&
396 (strncmp(linebuff+after_time_offset, " l ", strlen(" l ")) == 0))
398 line_prefix_info->after_time = NULL;
402 line_prefix_info->after_time = g_malloc(dollar_offset - after_time_offset);
403 strncpy(line_prefix_info->after_time, linebuff+after_time_offset,
404 dollar_offset - after_time_offset);
405 line_prefix_info->after_time[dollar_offset - after_time_offset-1] = '\0';
408 /* Add packet entry into table */
409 pkey = g_malloc(sizeof(pkey));
411 g_hash_table_insert(file_externals->packet_prefix_table, pkey, line_prefix_info);
413 /* Set pseudo-header if necessary */
414 set_pseudo_header_info(wth, encap, this_offset, &wth->pseudo_header,
417 /* OK, we have packet details to return */
423 /* No packet details to return... */
429 /**************************************************/
430 /* Read & seek function. */
431 /**************************************************/
433 catapult_dct2000_seek_read(wtap *wth, gint64 seek_off,
434 union wtap_pseudo_header *pseudo_header, guchar *pd,
435 int length, int *err, gchar **err_info)
437 gint64 offset = wth->data_offset;
438 long dollar_offset, before_time_offset, after_time_offset;
439 packet_direction_t direction;
441 int seconds, useconds, data_chars;
446 /* Seek to beginning of packet */
447 if (file_seek(wth->random_fh, seek_off, SEEK_SET, err) == -1)
452 /* Re-read whole line (this should succeed) */
453 if (read_new_line(wth->random_fh, &offset, &length) == FALSE)
458 /* Try to parse this line again (should succeed as re-reading...) */
459 if (parse_line(length, &seconds, &useconds,
460 &before_time_offset, &after_time_offset,
462 &data_chars, &direction, &encap))
466 char timestamp_string[32];
467 sprintf(timestamp_string, "%d.%04d", seconds, useconds/100);
469 /* Make sure all packets go to catapult dct2000 dissector */
470 wth->phdr.pkt_encap = WTAP_ENCAP_CATAPULT_DCT2000;
473 /*********************/
474 /* Write stub header */
475 stub_offset = write_stub_header((guchar*)pd, timestamp_string,
479 /********************************/
480 /* Copy packet data into buffer */
481 for (n=0; n <= data_chars; n+=2)
483 pd[stub_offset + n/2] = (hex_from_char(linebuff[dollar_offset+n]) << 4) |
484 hex_from_char(linebuff[dollar_offset+n+1]);
487 /* Set packet pseudo-header if necessary */
488 set_pseudo_header_info(wth, encap, seek_off, pseudo_header, direction);
494 /* If get here, must have failed */
496 *err_info = g_strdup_printf("catapult dct2000: seek_read failed to read/parse "
497 "line at position %lld", seek_off);
502 /******************************************/
503 /* Free dct2000-specific capture info */
504 /******************************************/
505 void catapult_dct2000_close(wtap *wth)
507 /* Look up externals for this file */
508 dct2000_file_externals_t *file_externals =
509 (dct2000_file_externals_t*)g_hash_table_lookup(file_externals_table, wth);
511 /* The entry *has* to be found */
517 /* Free up its line prefix values */
518 g_hash_table_foreach_remove(file_externals->packet_prefix_table,
519 free_line_prefix_info, NULL);
520 /* Free up its line prefix table */
521 g_hash_table_destroy(file_externals->packet_prefix_table);
523 /* And remove the externals entry from the global table */
524 g_hash_table_remove(file_externals_table, (void*)wth);
526 /* And free up file_externals itself */
527 g_free(file_externals);
529 /* Also free this capture info */
530 g_free(wth->capture.catapult_dct2000);
536 /***************************/
538 /***************************/
540 /*****************************************************/
541 /* The file that we are writing to has been opened. */
542 /* Set other dump callbacks. */
543 /*****************************************************/
544 gboolean catapult_dct2000_dump_open(wtap_dumper *wdh, gboolean cant_seek _U_, int *err _U_)
546 /* Fill in other dump callbacks */
547 wdh->subtype_write = catapult_dct2000_dump;
548 wdh->subtype_close = catapult_dct2000_dump_close;
553 /*********************************************************/
554 /* Respond to queries about which encap types we support */
556 /*********************************************************/
557 int catapult_dct2000_dump_can_write_encap(int encap)
561 case WTAP_ENCAP_CATAPULT_DCT2000:
562 /* We support this */
565 return WTAP_ERR_UNSUPPORTED_ENCAP;
570 /*****************************************/
571 /* Write a single packet out to the file */
572 /*****************************************/
573 gboolean catapult_dct2000_dump(wtap_dumper *wdh, const struct wtap_pkthdr *phdr,
574 const union wtap_pseudo_header *pseudo_header,
575 const guchar *pd, int *err _U_)
578 line_prefix_info_t *prefix = NULL;
579 gchar time_string[16];
581 /******************************************************/
582 /* Look up the file_externals structure for this file */
583 /* Find wtap external structure for this wtap */
584 dct2000_file_externals_t *file_externals =
585 (dct2000_file_externals_t*)g_hash_table_lookup(file_externals_table,
586 pseudo_header->dct2000.wth);
588 if (wdh->dump.dct2000 == NULL)
590 /* Allocate the dct2000-specific dump structure */
591 wdh->dump.dct2000 = g_malloc(sizeof(catapult_dct2000_t));
593 /* Write out saved first line */
594 fwrite(file_externals->firstline, 1, file_externals->firstline_length, wdh->fh);
595 fwrite("\n", 1, 1, wdh->fh);
597 /* Also write out saved second line with timestamp corresponding to the
598 opening time of the log.
600 fwrite(file_externals->secondline, 1, file_externals->secondline_length, wdh->fh);
601 fwrite("\n", 1, 1, wdh->fh);
603 /* Allocate the dct2000-specific dump structure */
604 wdh->dump.dct2000 = g_malloc(sizeof(catapult_dct2000_t));
606 /* Copy time of beginning of file */
607 wdh->dump.dct2000->start_time.secs =
608 pseudo_header->dct2000.wth->capture.catapult_dct2000->start_secs;
609 wdh->dump.dct2000->start_time.nsecs =
610 (pseudo_header->dct2000.wth->capture.catapult_dct2000->start_usecs * 1000);
612 /* Set flag do don't write header out again */
613 wdh->dump.dct2000->first_packet_written = TRUE;
617 /******************************************************************/
618 /* Write out this packet's prefix, including calculated timestamp */
620 /* Look up line data prefix using stored offset */
621 prefix = (line_prefix_info_t*)g_hash_table_lookup(file_externals->packet_prefix_table,
622 (const void*)&(pseudo_header->dct2000.seek_off));
624 /* Write out text before timestamp */
625 fwrite(prefix->before_time, 1, strlen(prefix->before_time), wdh->fh);
627 /* Calculate time of this packet to write, relative to start of dump */
628 if (phdr->ts.nsecs >= wdh->dump.dct2000->start_time.nsecs)
630 g_snprintf(time_string, 16, "%ld.%04d",
631 (long)(phdr->ts.secs - wdh->dump.dct2000->start_time.secs),
632 (phdr->ts.nsecs - wdh->dump.dct2000->start_time.nsecs) / 100000);
636 g_snprintf(time_string, 16, "%ld.%04u",
637 (long)(phdr->ts.secs - wdh->dump.dct2000->start_time.secs-1),
638 ((1000000000 + (phdr->ts.nsecs / 100000)) - (wdh->dump.dct2000->start_time.nsecs / 100000)) % 10000);
641 /* Write out the calculated timestamp */
642 fwrite(time_string, 1, strlen(time_string), wdh->fh);
644 /* Write out text between timestamp and start of hex data */
645 if (prefix->after_time == NULL)
647 fwrite(" l ", 1, strlen(" l "), wdh->fh);
651 fwrite(prefix->after_time, 1, strlen(prefix->after_time), wdh->fh);
655 /****************************************************************/
656 /* Need to skip stub header at start of pd before we reach data */
659 for (n=0; pd[n] != '\0'; n++);
662 /* Context port number */
666 for (; pd[n] != '\0'; n++);
670 for (; pd[n] != '\0'; n++);
673 /* Variant number (as string) */
674 for (; pd[n] != '\0'; n++);
677 /* Outhdr (as string) */
678 for (; pd[n] != '\0'; n++);
681 /* Direction & encap */
685 /**************************************/
686 /* Remainder is encapsulated protocol */
687 fwrite("$", 1, 1, wdh->fh);
689 /* Each binary byte is written out as 2 hex string chars */
690 for (; n < phdr->len; n++)
693 c[0] = char_from_hex((guchar)(pd[n] >> 4));
694 c[1] = char_from_hex((guchar)(pd[n] & 0x0f));
696 /* Write both hex chars of byte together */
697 fwrite(c, 1, 2, wdh->fh);
701 fwrite("\n", 1, 1, wdh->fh);
707 /******************************************************/
708 /* Close a file we've been writing to. */
709 /******************************************************/
710 static gboolean catapult_dct2000_dump_close(wtap_dumper *wdh _U_, int *err _U_)
718 /****************************/
719 /* Private helper functions */
720 /****************************/
722 /**********************************************************************/
723 /* Read a new line from the file, starting at offset. */
724 /* - writes data to static var linebuff */
725 /* - on return 'offset' will point to the next position to read from */
726 /* - return TRUE if this read is successful */
727 /**********************************************************************/
728 gboolean read_new_line(FILE_T fh, gint64 *offset, gint *length)
733 result = file_gets(linebuff, MAX_LINE_LENGTH, fh);
736 /* No characters found */
740 /* Set length and offset.. */
741 *length = strlen(linebuff);
742 *offset = *offset + *length;
744 /* ...but don't want to include newline in line length */
745 if (linebuff[*length-1] == '\n')
747 linebuff[*length-1] = '\0';
748 *length = *length - 1;
755 /**********************************************************************/
756 /* Parse a line from buffer, by identifying: */
757 /* - context, port and direction of packet */
759 /* - data position and length */
760 /* Return TRUE if this packet looks valid and can be displayed */
761 /**********************************************************************/
762 gboolean parse_line(gint line_length, gint *seconds, gint *useconds,
763 long *before_time_offset, long *after_time_offset,
764 long *data_offset, gint *data_chars,
765 packet_direction_t *direction,
770 char port_number_string[MAX_PORT_DIGITS+1];
771 int variant_digits = 0;
773 int protocol_chars = 0;
774 int outhdr_chars = 0;
776 char seconds_buff[MAX_SECONDS_CHARS+1];
778 char subsecond_decimals_buff[MAX_SUBSECOND_DECIMALS+1];
779 int subsecond_decimals_chars;
781 gboolean atm_header_present = FALSE;
783 /* Read context name until find '.' */
784 for (n=0; linebuff[n] != '.' && (n < MAX_CONTEXT_NAME) && (n+1 < line_length); n++)
786 if (!isalnum(linebuff[n]) && (linebuff[n] != '_'))
790 context_name[n] = linebuff[n];
792 if (n == MAX_CONTEXT_NAME || (n+1 >= line_length))
797 /* '.' must follow context name */
798 if (linebuff[n] != '.')
802 context_name[n] = '\0';
807 /* Now read port number */
808 for (port_digits = 0;
809 (linebuff[n] != '/') && (port_digits <= MAX_PORT_DIGITS) && (n+1 < line_length);
812 if (!isdigit(linebuff[n]))
816 port_number_string[port_digits] = linebuff[n];
818 if (port_digits > MAX_PORT_DIGITS || (n+1 >= line_length))
823 /* Slash char must follow port number */
824 if (linebuff[n] != '/')
828 port_number_string[port_digits] = '\0';
829 context_port = atoi(port_number_string);
834 /* Now for the protocol name */
835 for (protocol_chars = 0;
836 (linebuff[n] != '/') && (protocol_chars < MAX_PROTOCOL_NAME) && (n < line_length);
837 n++, protocol_chars++)
839 if (!isalnum(linebuff[n]) && linebuff[n] != '_')
843 protocol_name[protocol_chars] = linebuff[n];
845 if (protocol_chars == MAX_PROTOCOL_NAME || n >= line_length)
847 /* If doesn't fit, fail rather than truncate */
850 protocol_name[protocol_chars] = '\0';
852 /* Slash char must follow protocol name */
853 if (linebuff[n] != '/')
861 /* Following the / is the variant number. No digits indicate 1 */
862 for (variant_digits = 0;
863 (isdigit(linebuff[n])) && (variant_digits <= MAX_VARIANT_DIGITS) && (n+1 < line_length);
864 n++, variant_digits++)
866 if (!isdigit(linebuff[n]))
870 variant_name[variant_digits] = linebuff[n];
872 if (variant_digits > MAX_VARIANT_DIGITS || (n+1 >= line_length))
876 if (variant_digits > 0)
878 variant_name[variant_digits] = '\0';
879 variant = atoi(variant_name);
883 strcpy(variant_name, "1");
887 /* Outheader values may follow */
888 outhdr_name[0] = '\0';
889 if (linebuff[n] == ',')
894 for (outhdr_chars = 0;
895 (isdigit(linebuff[n]) || linebuff[n] == ',') &&
896 (outhdr_chars <= MAX_OUTHDR_NAME) && (n+1 < line_length);
899 if (!isdigit(linebuff[n]) && (linebuff[n] != ','))
903 outhdr_name[outhdr_chars] = linebuff[n];
905 if (outhdr_chars > MAX_OUTHDR_NAME || (n+1 >= line_length))
909 /* Terminate (possibly empty) string */
910 outhdr_name[outhdr_chars] = '\0';
916 /******************************************************************/
917 /* Now check whether we know how to use a packet of this protocol */
919 if ((strcmp(protocol_name, "ip") == 0) || (strcmp(protocol_name, "sctp") == 0))
921 *encap = WTAP_ENCAP_RAW_IP;
925 /* FP may be carried over ATM, which has separate atm header to parse */
926 if ((strcmp(protocol_name, "fp") == 0) ||
927 (strcmp(protocol_name, "fp_r4") == 0) ||
928 (strcmp(protocol_name, "fp_r5") == 0) ||
929 (strcmp(protocol_name, "fp_r6") == 0))
931 if ((variant > 256) && (variant % 256 == 3))
933 /* FP over udp is contained in IPPrim... */
938 /* FP over AAL0 or AAL2 */
939 *encap = WTAP_ENCAP_ATM_PDUS_UNTRUNCATED;
940 atm_header_present = TRUE;
945 if (strcmp(protocol_name, "ppp") == 0)
947 *encap = WTAP_ENCAP_PPP;
950 if (strcmp(protocol_name, "isdn_l3") == 0)
952 /* Despite the name, this does seem to correspond to L2... */
953 *encap = WTAP_ENCAP_ISDN;
956 if (strcmp(protocol_name, "ethernet") == 0)
958 *encap = WTAP_ENCAP_ETHERNET;
961 if ((strcmp(protocol_name, "saalnni_sscop") == 0) ||
962 (strcmp(protocol_name, "saaluni_sscop") == 0))
964 *encap = DCT2000_ENCAP_SSCOP;
967 if (strcmp(protocol_name, "frelay_l2") == 0)
969 *encap = WTAP_ENCAP_FRELAY;
972 if (strcmp(protocol_name, "ss7_mtp2") == 0)
974 *encap = DCT2000_ENCAP_MTP2;
977 if ((strcmp(protocol_name, "nbap") == 0) ||
978 (strcmp(protocol_name, "nbap_r4") == 0) ||
979 (strncmp(protocol_name, "nbap_sscfuni", strlen("nbap_sscfuni")) == 0))
981 /* The entire message in these cases is nbap, so use an encap value. */
982 *encap = DCT2000_ENCAP_NBAP;
986 /* Not a supported board port protocol/encap, but can show as raw data or
987 in some cases find protocol embedded inside primitive */
988 *encap = DCT2000_ENCAP_UNHANDLED;
992 /* Find separate ATM header if necessary */
993 if (atm_header_present)
995 int header_chars_seen = 0;
997 /* Scan ahead to the next $ */
998 for (; (linebuff[n] != '$') && (n+1 < line_length); n++);
1001 if (n+1 >= line_length)
1006 /* Read consecutive hex chars into atm header buffer */
1008 (isalnum(linebuff[n]) &&
1009 (n < line_length) &&
1010 (header_chars_seen < AAL_HEADER_CHARS));
1011 n++, header_chars_seen++)
1013 aal_header_chars[header_chars_seen] = linebuff[n];
1016 /* Sometimes see strange encoding of cid in last (non-digit) character */
1017 if (header_chars_seen == (AAL_HEADER_CHARS-1))
1019 aal_header_chars[AAL_HEADER_CHARS-1] = linebuff[n];
1020 header_chars_seen++;
1023 if (header_chars_seen != AAL_HEADER_CHARS || n >= line_length)
1030 /* Scan ahead to the next space */
1031 for (; (linebuff[n] != ' ') && (n+1 < line_length); n++);
1032 if (n+1 >= line_length)
1039 /* Next character gives direction of message (must be 's' or 'r') */
1040 if (linebuff[n] == 's')
1045 if (linebuff[n] == 'r')
1047 *direction = received;
1055 /*********************************************************************/
1056 /* Find and read the timestamp */
1058 /* Now scan to the next digit, which should be the start of the timestamp */
1059 for (; !isdigit(linebuff[n]) && (n < line_length); n++);
1060 if (n >= line_length)
1065 *before_time_offset = n;
1068 for (seconds_chars = 0;
1069 (linebuff[n] != '.') &&
1070 (seconds_chars <= MAX_SECONDS_CHARS) &&
1072 n++, seconds_chars++)
1074 if (!isdigit(linebuff[n]))
1076 /* Found a non-digit before decimal point. Fail */
1079 seconds_buff[seconds_chars] = linebuff[n];
1081 if (seconds_chars > MAX_SECONDS_CHARS || n >= line_length)
1083 /* Didn't fit in buffer. Fail rather than use truncated */
1087 /* Convert found value into number */
1088 seconds_buff[seconds_chars] = '\0';
1089 *seconds = atoi(seconds_buff);
1091 /* The decimal point must follow the last of the seconds digits */
1092 if (linebuff[n] != '.')
1099 /* Subsecond decimal digits (expect 4-digit accuracy) */
1100 for (subsecond_decimals_chars = 0;
1101 (linebuff[n] != ' ') &&
1102 (subsecond_decimals_chars <= MAX_SUBSECOND_DECIMALS) &&
1104 n++, subsecond_decimals_chars++)
1106 if (!isdigit(linebuff[n]))
1110 subsecond_decimals_buff[subsecond_decimals_chars] = linebuff[n];
1112 if (subsecond_decimals_chars > MAX_SUBSECOND_DECIMALS || n >= line_length)
1114 /* More numbers than expected - give up */
1117 /* Convert found value into microseconds */
1118 subsecond_decimals_buff[subsecond_decimals_chars] = '\0';
1119 *useconds = atoi(subsecond_decimals_buff) * 100;
1121 /* Space character must follow end of timestamp */
1122 if (linebuff[n] != ' ')
1127 *after_time_offset = n;
1129 /* Now skip ahead to find start of data (marked by '$') */
1130 for (; (linebuff[n] != '$') && (n+1 < line_length); n++);
1131 if (n+1 >= line_length)
1138 /* Set offset to data start within line */
1141 /* Set number of chars that comprise the hex string protocol data */
1142 *data_chars = line_length - n;
1144 /* Need to skip first byte (2 hex string chars) from ISDN messages.
1145 TODO: find out what this byte means...
1147 if (*encap == WTAP_ENCAP_ISDN)
1156 /*****************************************************************/
1157 /* Write the stub info to the data buffer while reading a packet */
1158 /*****************************************************************/
1159 int write_stub_header(guchar *frame_buffer, char *timestamp_string,
1160 packet_direction_t direction, int encap)
1162 int stub_offset = 0;
1164 strcpy((char*)frame_buffer, context_name);
1165 stub_offset += (strlen(context_name) + 1);
1167 /* Context port number */
1168 frame_buffer[stub_offset] = context_port;
1171 /* Timestamp within file */
1172 strcpy((char*)&frame_buffer[stub_offset], timestamp_string);
1173 stub_offset += (strlen(timestamp_string) + 1);
1176 strcpy((char*)&frame_buffer[stub_offset], protocol_name);
1177 stub_offset += (strlen(protocol_name) + 1);
1179 /* Protocol variant number (as string) */
1180 strcpy((void*)&frame_buffer[stub_offset], variant_name);
1181 stub_offset += (strlen(variant_name) + 1);
1184 strcpy((char*)&frame_buffer[stub_offset], outhdr_name);
1185 stub_offset += (strlen(outhdr_name) + 1);
1188 frame_buffer[stub_offset] = direction;
1192 frame_buffer[stub_offset] = (guint8)encap;
1199 /**************************************************************/
1200 /* Set pseudo-header info depending upon packet encapsulation */
1201 /**************************************************************/
1202 void set_pseudo_header_info(wtap *wth,
1205 union wtap_pseudo_header *pseudo_header,
1206 packet_direction_t direction)
1208 pseudo_header->dct2000.seek_off = file_offset;
1209 pseudo_header->dct2000.wth = wth;
1213 case WTAP_ENCAP_ATM_PDUS_UNTRUNCATED:
1214 set_aal_info(pseudo_header, direction);
1216 case WTAP_ENCAP_ISDN:
1217 set_isdn_info(pseudo_header, direction);
1219 case WTAP_ENCAP_PPP:
1220 set_ppp_info(pseudo_header, direction);
1224 /* Other supported types don't need to set anything here... */
1230 /*********************************************/
1231 /* Fill in atm pseudo-header with known info */
1232 /*********************************************/
1233 void set_aal_info(union wtap_pseudo_header *pseudo_header, packet_direction_t direction)
1235 /* 'aal_head_chars' has this format (for AAL2 at least):
1236 Global Flow Control (4 bits) | VPI (8 bits) | VCI (16 bits) |
1237 Payload Type (4 bits) | Padding (3 bits?) | Link? (1 bit) |
1238 Channel Identifier (8 bits) | ...
1241 /* Indicate that this is a reassembled PDU */
1242 pseudo_header->dct2000.inner_pseudo_header.atm.flags = 0x00;
1244 /* Channel 0 is DTE->DCE, 1 is DCE->DTE. Always set 0 for now.
1245 TODO: Can we infer the correct value here?
1246 Meanwhile, just use the direction to make them distinguishable...
1248 pseudo_header->dct2000.inner_pseudo_header.atm.channel = (direction == received);
1250 /* Assume always AAL2 for FP */
1251 pseudo_header->dct2000.inner_pseudo_header.atm.aal = AAL_2;
1253 pseudo_header->dct2000.inner_pseudo_header.atm.type = TRAF_UMTS_FP;
1254 pseudo_header->dct2000.inner_pseudo_header.atm.subtype = TRAF_ST_UNKNOWN;
1256 /* vpi is 8 bits (2nd & 3rd nibble) */
1257 pseudo_header->dct2000.inner_pseudo_header.atm.vpi =
1258 ((hex_from_char(aal_header_chars[1]) << 4) |
1259 hex_from_char(aal_header_chars[2]));
1261 /* vci is next 16 bits */
1262 pseudo_header->dct2000.inner_pseudo_header.atm.vci =
1263 ((hex_from_char(aal_header_chars[3]) << 12) |
1264 (hex_from_char(aal_header_chars[4]) << 8) |
1265 (hex_from_char(aal_header_chars[5]) << 4) |
1266 hex_from_char(aal_header_chars[6]));
1268 /* 0 means we don't know how many cells the frame comprises. */
1269 pseudo_header->dct2000.inner_pseudo_header.atm.cells = 0;
1271 /* cid is usually last byte. Unless last char is not hex digit, in which
1272 case cid is derived from last char in ascii */
1273 if (isalnum(aal_header_chars[11]))
1275 pseudo_header->dct2000.inner_pseudo_header.atm.aal2_cid =
1276 ((hex_from_char(aal_header_chars[10]) << 4) |
1277 hex_from_char(aal_header_chars[11]));
1281 pseudo_header->dct2000.inner_pseudo_header.atm.aal2_cid =
1282 (int)aal_header_chars[11] - 48;
1288 /**********************************************/
1289 /* Fill in isdn pseudo-header with known info */
1290 /**********************************************/
1291 void set_isdn_info(union wtap_pseudo_header *pseudo_header,
1292 packet_direction_t direction)
1294 /* This field is used to set the 'Source' and 'Destination' columns to
1295 'User' or 'Network'. If we assume that we're simulating the network,
1296 treat Received messages as being destined for the network.
1298 pseudo_header->dct2000.inner_pseudo_header.isdn.uton = (direction == received);
1300 /* This corresponds to the circuit ID. 0 is treated as LAPD,
1301 everything else would be treated as a B-channel
1303 pseudo_header->dct2000.inner_pseudo_header.isdn.channel = 0;
1307 /*********************************************/
1308 /* Fill in ppp pseudo-header with known info */
1309 /*********************************************/
1310 static void set_ppp_info(union wtap_pseudo_header *pseudo_header,
1311 packet_direction_t direction)
1313 /* Set direction. */
1314 pseudo_header->dct2000.inner_pseudo_header.p2p.sent = (direction == sent);
1318 /********************************************************/
1319 /* Return hex nibble equivalent of hex string character */
1320 /********************************************************/
1321 guchar hex_from_char(gchar c)
1323 if ((c >= '0') && (c <= '9'))
1328 if ((c >= 'a') && (c <= 'f'))
1330 return 0x0a + (c - 'a');
1333 /* Not a valid hex string character */
1338 /********************************************************/
1339 /* Return character corresponding to hex nibble value */
1340 /********************************************************/
1341 gchar char_from_hex(guchar hex)
1343 static char hex_lookup[16] =
1344 { '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};
1351 return hex_lookup[hex];
1354 /***************************************************/
1355 /* Equality function for file_externals hash table */
1356 /***************************************************/
1357 gint wth_equal(gconstpointer v, gconstpointer v2)
1362 /***********************************************/
1363 /* Hash function for file_externals hash table */
1364 /***********************************************/
1365 guint wth_hash_func(gconstpointer v)
1371 /***********************************************/
1372 /* Equality test for packet prefix hash tables */
1373 /***********************************************/
1374 gint packet_offset_equal(gconstpointer v, gconstpointer v2)
1376 /* Dereferenced pointers must have same gint64 offset value */
1377 return (*(const gint64*)v == *(const gint64*)v2);
1381 /********************************************/
1382 /* Hash function for packet-prefix hash table */
1383 /********************************************/
1384 guint packet_offset_hash_func(gconstpointer v)
1386 /* Use low-order bits of git64 offset value */
1387 return (guint)(*(const gint64*)v);
1391 /************************************************************************/
1392 /* Parse year, month, day, hour, minute, seconds out of formatted line. */
1393 /* Set secs and usecs as output */
1394 /* Return FALSE if no valid time can be read */
1395 /************************************************************************/
1396 gboolean get_file_time_stamp(time_t *secs, guint32 *usecs)
1400 #define MAX_MONTH_LETTERS 9
1401 char month[MAX_MONTH_LETTERS+1];
1403 int day, year, hour, minute, second;
1406 /* If line longer than expected, file is probably not correctly formatted */
1407 if (strlen(linebuff) > MAX_TIMESTAMP_LINE_LENGTH)
1412 /**************************************************************/
1413 /* First is month. Read until get a space following the month */
1414 for (n=0; (linebuff[n] != ' ') && (n < MAX_MONTH_LETTERS); n++)
1416 month[n] = linebuff[n];
1420 if (strcmp(month, "January" ) == 0) tm.tm_mon = 0;
1421 else if (strcmp(month, "February" ) == 0) tm.tm_mon = 1;
1422 else if (strcmp(month, "March" ) == 0) tm.tm_mon = 2;
1423 else if (strcmp(month, "April" ) == 0) tm.tm_mon = 3;
1424 else if (strcmp(month, "May" ) == 0) tm.tm_mon = 4;
1425 else if (strcmp(month, "June" ) == 0) tm.tm_mon = 5;
1426 else if (strcmp(month, "July" ) == 0) tm.tm_mon = 6;
1427 else if (strcmp(month, "August" ) == 0) tm.tm_mon = 7;
1428 else if (strcmp(month, "September") == 0) tm.tm_mon = 8;
1429 else if (strcmp(month, "October" ) == 0) tm.tm_mon = 9;
1430 else if (strcmp(month, "November" ) == 0) tm.tm_mon = 10;
1431 else if (strcmp(month, "December" ) == 0) tm.tm_mon = 11;
1434 /* Give up if not found a properly-formatted date */
1437 /* Skip space char */
1440 /********************************************************/
1441 /* Scan for remaining numerical fields */
1442 scan_found = sscanf(linebuff+n, "%d, %d %d:%d:%d.%u",
1443 &day, &year, &hour, &minute, &second, usecs);
1444 if (scan_found != 6)
1446 /* Give up if not all found */
1450 /******************************************************/
1451 /* Fill in remaining fields and return it in a time_t */
1452 tm.tm_year = year - 1900;
1457 tm.tm_isdst = -1; /* daylight saving time info not known */
1459 /* Get seconds from this time */
1460 *secs = mktime(&tm);
1462 /* Multiply 4 digits given to get micro-seconds */
1463 *usecs = *usecs * 100;
1468 /* Free the data allocated inside a line_prefix_info_t */
1469 gboolean free_line_prefix_info(gpointer key, gpointer value,
1470 gpointer user_data _U_)
1472 line_prefix_info_t *info = (line_prefix_info_t*)value;
1474 /* Free the 64-bit key value */
1477 /* Free the strings inside */
1478 g_free(info->before_time);
1479 if (info->after_time)
1481 g_free(info->after_time);
1484 /* And the structure itself */
1487 /* Item will always be removed from table */