2 * Routines for printing packet analysis trees.
4 * $Id: print.c,v 1.82 2004/05/01 21:04:27 obiot Exp $
6 * Gilbert Ramirez <gram@alumni.rice.edu>
8 * Ethereal - Network traffic analyzer
9 * By Gerald Combs <gerald@ethereal.com>
10 * Copyright 1998 Gerald Combs
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 #include <epan/epan.h>
35 #include <epan/epan_dissect.h>
36 #include <epan/tvbuff.h>
37 #include <epan/packet.h>
43 #include "packet-data.h"
44 #include "packet-frame.h"
46 #define PDML_VERSION "0"
47 #define PSML_VERSION "0"
49 static void proto_tree_print_node(proto_node *node, gpointer data);
50 static void proto_tree_print_node_pdml(proto_node *node, gpointer data);
51 static void print_hex_data_buffer(FILE *fh, register const guchar *cp,
52 register guint length, char_enc encoding, print_format_e format);
53 static void ps_clean_string(unsigned char *out, const unsigned char *in,
55 static void print_escaped_xml(FILE *fh, char *unescaped_string);
61 print_dissections_e print_dissections;
62 gboolean print_hex_for_data;
68 static void print_pdml_geninfo(proto_tree *tree, print_data *pdata);
70 FILE *open_print_dest(int to_file, const char *dest)
74 /* Open the file or command for output */
76 fh = fopen(dest, "w");
78 fh = popen(dest, "w");
83 gboolean close_print_dest(int to_file, FILE *fh)
85 /* Close the file or command */
87 return (fclose(fh) == 0);
89 return (pclose(fh) == 0);
94 proto_tree_print(print_args_t *print_args, epan_dissect_t *edt,
100 /* Create the output */
103 data.src_list = edt->pi.data_src;
104 data.encoding = edt->pi.fd->flags.encoding;
105 data.print_dissections = print_args->print_dissections;
106 data.print_hex_for_data = !print_args->print_hex;
107 /* If we're printing the entire packet in hex, don't
108 print uninterpreted data fields in hex as well. */
109 data.format = print_args->format;
112 switch(data.format) {
113 case(PR_FMT_TEXT): /* fall through */
115 proto_tree_children_foreach(edt->tree, proto_tree_print_node, &data);
118 fprintf(fh, "<packet>\n");
120 /* Print a "geninfo" protocol as required by PDML */
121 print_pdml_geninfo(edt->tree, &data);
123 proto_tree_children_foreach(edt->tree, proto_tree_print_node_pdml, &data);
125 fprintf(fh, "</packet>\n\n");
128 /* if this is the first packet, we have to create the PSML structure output */
129 if(edt->pi.fd->num == 1) {
130 fprintf(fh, "<structure>\n");
132 for(i=0; i < edt->pi.cinfo->num_cols; i++) {
133 fprintf(fh, "<section>");
134 print_escaped_xml(fh, edt->pi.cinfo->col_title[i]);
135 fprintf(fh, "</section>\n");
138 fprintf(fh, "</structure>\n\n");
141 fprintf(fh, "<packet>\n");
143 for(i=0; i < edt->pi.cinfo->num_cols; i++) {
144 fprintf(fh, "<section>");
145 print_escaped_xml(fh, edt->pi.cinfo->col_data[i]);
146 fprintf(fh, "</section>\n");
149 fprintf(fh, "</packet>\n\n");
152 g_assert_not_reached();
157 * Find the data source for a specified field, and return a pointer
158 * to the data in it. Returns NULL if the data is out of bounds.
160 static const guint8 *
161 get_field_data(GSList *src_list, field_info *fi)
166 gint length, tvbuff_length;
168 for (src_le = src_list; src_le != NULL; src_le = src_le->next) {
171 if (fi->ds_tvb == src_tvb) {
175 * XXX - a field can have a length that runs past
176 * the end of the tvbuff. Ideally, that should
177 * be fixed when adding an item to the protocol
178 * tree, but checking the length when doing
179 * that could be expensive. Until we fix that,
180 * we'll do the check here.
182 tvbuff_length = tvb_length_remaining(src_tvb,
184 if (tvbuff_length < 0) {
188 if (length > tvbuff_length)
189 length = tvbuff_length;
190 return tvb_get_ptr(src_tvb, fi->start, length);
193 g_assert_not_reached();
194 return NULL; /* not found */
197 #define MAX_INDENT 160
199 #define MAX_PS_LINE_LENGTH 256
201 /* Print a tree's data, and any child nodes. */
203 void proto_tree_print_node(proto_node *node, gpointer data)
205 field_info *fi = PITEM_FINFO(node);
206 print_data *pdata = (print_data*) data;
208 gchar label_str[ITEM_LABEL_LENGTH];
211 /* Don't print invisible entries. */
212 if (PROTO_ITEM_IS_HIDDEN(node))
215 /* was a free format label produced? */
217 label_ptr = fi->rep->representation;
219 else { /* no, make a generic label */
220 label_ptr = label_str;
221 proto_item_fill_label(fi, label_str);
224 print_line(pdata->fh, pdata->level, pdata->format, label_ptr);
226 /* If it's uninterpreted data, dump it (unless our caller will
227 be printing the entire packet in hex). */
228 if (fi->hfinfo->id == proto_data && pdata->print_hex_for_data) {
230 * Find the data for this field.
232 pd = get_field_data(pdata->src_list, fi);
234 print_hex_data_buffer(pdata->fh, pd, fi->length,
235 pdata->encoding, pdata->format);
239 /* If we're printing all levels, or if this node is one with a
240 subtree and its subtree is expanded, recurse into the subtree,
242 g_assert(fi->tree_type >= -1 && fi->tree_type < num_tree_types);
243 if (pdata->print_dissections == print_dissections_expanded ||
244 (pdata->print_dissections == print_dissections_as_displayed &&
245 fi->tree_type >= 0 && tree_is_expanded[fi->tree_type])) {
246 if (node->first_child != NULL) {
248 proto_tree_children_foreach(node,
249 proto_tree_print_node, pdata);
255 /* Print a string, escaping out certain characters that need to
256 * escaped out for XML. */
258 print_escaped_xml(FILE *fh, char *unescaped_string)
262 for (p = unescaped_string; *p != '\0'; p++) {
286 print_field_hex_value(print_data *pdata, field_info *fi)
291 /* Find the data for this field. */
292 pd = get_field_data(pdata->src_list, fi);
295 /* Print a simple hex dump */
296 for (i = 0 ; i < fi->length; i++) {
297 fprintf(pdata->fh, "%02x", pd[i]);
303 /* Print a tree's data, and any child nodes, as PDML */
305 proto_tree_print_node_pdml(proto_node *node, gpointer data)
307 field_info *fi = PITEM_FINFO(node);
308 print_data *pdata = (print_data*) data;
310 gchar label_str[ITEM_LABEL_LENGTH];
311 char *dfilter_string;
315 for (i = -1; i < pdata->level; i++) {
316 fputs(" ", pdata->fh);
319 /* Text label. It's printed as a field with no name. */
320 if (fi->hfinfo->id == hf_text_only) {
323 label_ptr = fi->rep->representation;
329 fputs("<field show=\"", pdata->fh);
330 print_escaped_xml(pdata->fh, label_ptr);
332 fprintf(pdata->fh, "\" size=\"%d", fi->length);
333 fprintf(pdata->fh, "\" pos=\"%d", fi->start);
335 fputs("\" value=\"", pdata->fh);
336 print_field_hex_value(pdata, fi);
338 if (node->first_child != NULL) {
339 fputs("\">\n", pdata->fh);
342 fputs("\"/>\n", pdata->fh);
345 /* Uninterpreted data, i.e., the "Data" protocol, is
346 * printed as a field instead of a protocol. */
347 else if (fi->hfinfo->id == proto_data) {
349 fputs("<field name=\"data\" value=\"", pdata->fh);
351 print_field_hex_value(pdata, fi);
353 fputs("\"/>\n", pdata->fh);
356 /* Normal protocols and fields */
358 if (fi->hfinfo->type == FT_PROTOCOL) {
359 fputs("<proto name=\"", pdata->fh);
362 fputs("<field name=\"", pdata->fh);
364 print_escaped_xml(pdata->fh, fi->hfinfo->abbrev);
368 * http://analyzer.polito.it/30alpha/docs/dissectors/PDMLSpec.htm
370 * the show fields contains things in 'human readable' format
371 * showname: contains only the name of the field
372 * show: contains only the data of the field
373 * showdtl: contains additional details of the field data
374 * showmap: contains mappings of the field data (e.g. the hostname to an IP address)
376 * XXX - the showname shouldn't contain the field data itself
377 * (like it's contained in the fi->rep->representation).
378 * Unfortunately, we don't have the field data representation for
379 * all fields, so this isn't currently possible */
380 fputs("\" showname=\"", pdata->fh);
381 print_escaped_xml(pdata->fh, fi->hfinfo->name);
385 fputs("\" showname=\"", pdata->fh);
386 print_escaped_xml(pdata->fh, fi->rep->representation);
389 label_ptr = label_str;
390 proto_item_fill_label(fi, label_str);
391 fputs("\" showname=\"", pdata->fh);
392 print_escaped_xml(pdata->fh, label_ptr);
395 if(PROTO_ITEM_IS_HIDDEN(node)) {
396 fprintf(pdata->fh, "\" hide=\"yes");
399 fprintf(pdata->fh, "\" size=\"%d", fi->length);
400 fprintf(pdata->fh, "\" pos=\"%d", fi->start);
401 /* fprintf(pdata->fh, "\" id=\"%d", fi->hfinfo->id);*/
403 if (fi->hfinfo->type != FT_PROTOCOL) {
406 /* XXX - this is a hack until we can just call
407 * fvalue_to_string_repr() for *all* FT_* types. */
408 dfilter_string = proto_construct_dfilter_string(fi,
410 if (dfilter_string != NULL) {
411 chop_len = strlen(fi->hfinfo->abbrev) + 4; /* for " == " */
413 /* XXX - Remove double-quotes. Again, once we
414 * can call fvalue_to_string_repr(), we can
415 * ask it not to produce the version for
416 * display-filters, and thus, no
418 if (dfilter_string[strlen(dfilter_string)-1] == '"') {
419 dfilter_string[strlen(dfilter_string)-1] = '\0';
423 fputs("\" show=\"", pdata->fh);
424 print_escaped_xml(pdata->fh, &dfilter_string[chop_len]);
426 if (fi->length > 0) {
427 fputs("\" value=\"", pdata->fh);
428 print_field_hex_value(pdata, fi);
432 if (node->first_child != NULL) {
433 fputs("\">\n", pdata->fh);
435 else if (fi->hfinfo->id == proto_data) {
436 fputs("\">\n", pdata->fh);
439 fputs("\"/>\n", pdata->fh);
443 /* We always print all levels for PDML. Recurse here. */
444 if (node->first_child != NULL) {
446 proto_tree_children_foreach(node,
447 proto_tree_print_node_pdml, pdata);
451 if (node->first_child != NULL) {
452 for (i = -1; i < pdata->level; i++) {
453 fputs(" ", pdata->fh);
455 if (fi->hfinfo->type == FT_PROTOCOL) {
456 fputs("</proto>\n", pdata->fh);
459 fputs("</field>\n", pdata->fh);
464 /* Print info for a 'geninfo' pseudo-protocol. This is required by
465 * the PDML spec. The information is contained in Ethereal's 'frame' protocol,
466 * but we produce a 'geninfo' protocol in the PDML to conform to spec.
467 * The 'frame' protocol follows the 'geninfo' protocol in the PDML. */
469 print_pdml_geninfo(proto_tree *tree, print_data *pdata)
471 guint32 num, len, caplen;
473 GPtrArray *finfo_array;
474 field_info *frame_finfo;
476 /* Get frame protocol's finfo. */
477 finfo_array = proto_find_finfo(tree, proto_frame);
478 if (g_ptr_array_len(finfo_array) < 1) {
481 frame_finfo = finfo_array->pdata[0];
482 g_ptr_array_free(finfo_array, FALSE);
484 /* frame.number --> geninfo.num */
485 finfo_array = proto_find_finfo(tree, hf_frame_number);
486 if (g_ptr_array_len(finfo_array) < 1) {
489 num = fvalue_get_integer(&((field_info*)finfo_array->pdata[0])->value);
490 g_ptr_array_free(finfo_array, FALSE);
492 /* frame.pkt_len --> geninfo.len */
493 finfo_array = proto_find_finfo(tree, hf_frame_packet_len);
494 if (g_ptr_array_len(finfo_array) < 1) {
497 len = fvalue_get_integer(&((field_info*)finfo_array->pdata[0])->value);
498 g_ptr_array_free(finfo_array, FALSE);
500 /* frame.cap_len --> geninfo.caplen */
501 finfo_array = proto_find_finfo(tree, hf_frame_capture_len);
502 if (g_ptr_array_len(finfo_array) < 1) {
505 caplen = fvalue_get_integer(&((field_info*)finfo_array->pdata[0])->value);
506 g_ptr_array_free(finfo_array, FALSE);
508 /* frame.time --> geninfo.timestamp */
509 finfo_array = proto_find_finfo(tree, hf_frame_arrival_time);
510 if (g_ptr_array_len(finfo_array) < 1) {
513 timestamp = fvalue_get(&((field_info*)finfo_array->pdata[0])->value);
514 g_ptr_array_free(finfo_array, FALSE);
516 /* Print geninfo start */
518 " <proto name=\"geninfo\" pos=\"0\" showname=\"General information\" size=\"%u\">\n",
519 frame_finfo->length);
521 /* Print geninfo.num */
523 " <field name=\"num\" pos=\"0\" show=\"%u\" showname=\"Number\" value=\"%x\" size=\"%u\"/>\n",
524 num, num, frame_finfo->length);
526 /* Print geninfo.len */
528 " <field name=\"len\" pos=\"0\" show=\"%u\" showname=\"Packet Length\" value=\"%x\" size=\"%u\"/>\n",
529 len, len, frame_finfo->length);
531 /* Print geninfo.caplen */
533 " <field name=\"caplen\" pos=\"0\" show=\"%u\" showname=\"Captured Length\" value=\"%x\" size=\"%u\"/>\n",
534 caplen, caplen, frame_finfo->length);
536 /* Print geninfo.timestamp */
538 " <field name=\"timestamp\" pos=\"0\" show=\"%s\" showname=\"Captured Time\" value=\"%d.%09d\" size=\"%u\"/>\n",
539 abs_time_to_str(timestamp), (int) timestamp->secs, timestamp->nsecs, frame_finfo->length);
541 /* Print geninfo end */
547 void print_hex_data(FILE *fh, print_format_e format, epan_dissect_t *edt)
549 gboolean multiple_sources;
559 * Set "multiple_sources" iff this frame has more than one
560 * data source; if it does, we need to print the name of
561 * the data source before printing the data from the
564 multiple_sources = (edt->pi.data_src->next != NULL);
566 for (src_le = edt->pi.data_src; src_le != NULL;
567 src_le = src_le->next) {
570 if (multiple_sources) {
572 print_line(fh, 0, format, "");
573 line = g_malloc(strlen(name) + 2); /* <name>:\0 */
576 print_line(fh, 0, format, line);
579 length = tvb_length(tvb);
580 cp = tvb_get_ptr(tvb, 0, length);
581 print_hex_data_buffer(fh, cp, length,
582 edt->pi.fd->flags.encoding, format);
587 * This routine is based on a routine created by Dan Lasley
588 * <DLASLEY@PROMUS.com>.
590 * It was modified for Ethereal by Gilbert Ramirez and others.
593 #define MAX_OFFSET_LEN 8 /* max length of hex offset of bytes */
594 #define BYTES_PER_LINE 16 /* max byte values printed on a line */
595 #define HEX_DUMP_LEN (BYTES_PER_LINE*3)
596 /* max number of characters hex dump takes -
597 2 digits plus trailing blank */
598 #define DATA_DUMP_LEN (HEX_DUMP_LEN + 2 + BYTES_PER_LINE)
599 /* number of characters those bytes take;
600 3 characters per byte of hex dump,
601 2 blanks separating hex from ASCII,
602 1 character per byte of ASCII dump */
603 #define MAX_LINE_LEN (MAX_OFFSET_LEN + 2 + DATA_DUMP_LEN)
604 /* number of characters per line;
605 offset, 2 blanks separating offset
606 from data dump, data dump */
609 print_hex_data_buffer(FILE *fh, register const guchar *cp,
610 register guint length, char_enc encoding, print_format_e format)
612 register unsigned int ad, i, j, k, l;
614 guchar line[MAX_LINE_LEN + 1];
615 unsigned int use_digits;
616 static guchar binhex[16] = {
617 '0', '1', '2', '3', '4', '5', '6', '7',
618 '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
620 print_line(fh, 0, format, "");
623 * How many of the leading digits of the offset will we supply?
624 * We always supply at least 4 digits, but if the maximum offset
625 * won't fit in 4 digits, we use as many digits as will be needed.
627 if (((length - 1) & 0xF0000000) != 0)
628 use_digits = 8; /* need all 8 digits */
629 else if (((length - 1) & 0x0F000000) != 0)
630 use_digits = 7; /* need 7 digits */
631 else if (((length - 1) & 0x00F00000) != 0)
632 use_digits = 6; /* need 6 digits */
633 else if (((length - 1) & 0x000F0000) != 0)
634 use_digits = 5; /* need 5 digits */
636 use_digits = 4; /* we'll supply 4 digits */
645 * Start of a new line.
652 c = (ad >> (l*4)) & 0xF;
653 line[j++] = binhex[c];
657 memset(line+j, ' ', DATA_DUMP_LEN);
660 * Offset in line of ASCII dump.
662 k = j + HEX_DUMP_LEN + 2;
665 line[j++] = binhex[c>>4];
666 line[j++] = binhex[c&0xf];
668 if (encoding == CHAR_EBCDIC) {
669 c = EBCDIC_to_ASCII1(c);
671 line[k++] = c >= ' ' && c < 0x7f ? c : '.';
673 if ((i & 15) == 0 || i == length) {
675 * We'll be starting a new line, or
676 * we're finished printing this buffer;
677 * dump out the line we've constructed,
678 * and advance the offset.
681 print_line(fh, 0, format, line);
688 void ps_clean_string(unsigned char *out, const unsigned char *in,
694 for (rd = 0, wr = 0 ; wr < outbuf_size; rd++, wr++ ) {
715 /* Some formats need stuff at the beginning of the output */
717 print_preamble(FILE *fh, print_format_e format, gchar *filename)
719 char psbuffer[MAX_PS_LINE_LENGTH]; /* static sized buffer! */
727 print_ps_preamble(fh);
729 fputs("%% Set the font to 10 point\n", fh);
730 fputs("/Courier findfont 10 scalefont setfont\n", fh);
732 fputs("%% the page title\n", fh);
733 ps_clean_string(psbuffer, filename, MAX_PS_LINE_LENGTH);
734 fprintf(fh, "/eth_pagetitle (%s - Ethereal) def\n", psbuffer);
738 fputs("<?xml version=\"1.0\"?>\n", fh);
739 fputs("<pdml version=\"" PDML_VERSION "\" ", fh);
740 fprintf(fh, "creator=\"%s/%s\">\n", PACKAGE, VERSION);
743 fputs("<?xml version=\"1.0\"?>\n", fh);
744 fputs("<psml version=\"" PSML_VERSION "\" ", fh);
745 fprintf(fh, "creator=\"%s/%s\">\n", PACKAGE, VERSION);
748 g_assert_not_reached();
753 print_packet_header(FILE *fh, print_format_e format, guint32 number, gchar *summary) {
754 char psbuffer[MAX_PS_LINE_LENGTH]; /* static sized buffer! */
762 ps_clean_string(psbuffer, summary, MAX_PS_LINE_LENGTH);
763 fprintf(fh, "[/Dest /__frame%u__ /Title (%s) /OUT pdfmark\n", number, psbuffer);
764 fputs("[/View [/XYZ -4 currentpoint matrix currentmatrix matrix defaultmatrix\n", fh);
765 fputs("matrix invertmatrix matrix concatmatrix transform exch pop 20 add null]\n", fh);
766 fprintf(fh, "/Dest /__frame%u__ /DEST pdfmark\n", number);
775 g_assert_not_reached();
780 print_formfeed(FILE *fh, print_format_e format) {
786 fputs("formfeed\n", fh);
795 g_assert_not_reached();
799 /* Some formats need stuff at the end of the output */
801 print_finale(FILE *fh, print_format_e format)
811 fputs("</pdml>\n", fh);
814 fputs("</psml>\n", fh);
817 g_assert_not_reached();
822 print_line(FILE *fh, int indent, print_format_e format, char *line)
824 char space[MAX_INDENT+1];
827 char psbuffer[MAX_PS_LINE_LENGTH]; /* static sized buffer! */
831 /* Prepare the tabs for printing, depending on tree level */
832 num_spaces = indent * 4;
833 if (num_spaces > MAX_INDENT) {
834 num_spaces = MAX_INDENT;
836 for (i = 0; i < num_spaces; i++) {
839 /* The string is NUL-terminated */
840 space[num_spaces] = '\0';
847 ps_clean_string(psbuffer, line, MAX_PS_LINE_LENGTH);
848 fprintf(fh, "%d (%s) putline\n", indent, psbuffer);
857 g_assert_not_reached();