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Diffstat (limited to 'epan/print.c')
| -rw-r--r-- | epan/print.c | 1809 |
1 files changed, 1809 insertions, 0 deletions
diff --git a/epan/print.c b/epan/print.c new file mode 100644 index 0000000000..41fd7d9b17 --- /dev/null +++ b/epan/print.c @@ -0,0 +1,1809 @@ +/* print.c + * Routines for printing packet analysis trees. + * + * $Id$ + * + * Gilbert Ramirez <gram@alumni.rice.edu> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include "config.h" + +#include <stdio.h> +#include <string.h> + +#include <glib.h> + +#include <epan/epan.h> +#include <epan/epan_dissect.h> +#include <epan/tvbuff.h> +#include <epan/packet.h> +#include <epan/emem.h> +#include <epan/expert.h> + +#include <epan/packet-range.h> +#include "print.h" +#include "isprint.h" +#include "ps.h" +#include "version_info.h" +#include <wsutil/file_util.h> +#include <epan/charsets.h> +#include <epan/dissectors/packet-data.h> +#include <epan/dissectors/packet-frame.h> +#include <epan/filesystem.h> + +#define PDML_VERSION "0" +#define PSML_VERSION "0" + +typedef struct { + int level; + print_stream_t *stream; + gboolean success; + GSList *src_list; + print_dissections_e print_dissections; + gboolean print_hex_for_data; + packet_char_enc encoding; + epan_dissect_t *edt; +} print_data; + +typedef struct { + int level; + FILE *fh; + GSList *src_list; + epan_dissect_t *edt; +} write_pdml_data; + +typedef struct { + output_fields_t *fields; + epan_dissect_t *edt; +} write_field_data_t; + +struct _output_fields { + gboolean print_header; + gchar separator; + gchar occurrence; + gchar aggregator; + GPtrArray *fields; + GHashTable *field_indicies; + GPtrArray **field_values; + gchar quote; + gboolean includes_col_fields; +}; + +GHashTable *output_only_tables = NULL; + +static gboolean write_headers = FALSE; + +static const gchar *get_field_hex_value(GSList *src_list, field_info *fi); +static void proto_tree_print_node(proto_node *node, gpointer data); +static void proto_tree_write_node_pdml(proto_node *node, gpointer data); +static const guint8 *get_field_data(GSList *src_list, field_info *fi); +static void write_pdml_field_hex_value(write_pdml_data *pdata, field_info *fi); +static gboolean print_hex_data_buffer(print_stream_t *stream, const guchar *cp, + guint length, packet_char_enc encoding); +static void ps_clean_string(char *out, const char *in, + int outbuf_size); +static void print_escaped_xml(FILE *fh, const char *unescaped_string); + +static void print_pdml_geninfo(proto_tree *tree, FILE *fh); + +static void proto_tree_get_node_field_values(proto_node *node, gpointer data); + +static FILE * +open_print_dest(gboolean to_file, const char *dest) +{ + FILE *fh; + + /* Open the file or command for output */ + if (to_file) + fh = ws_fopen(dest, "w"); + else + fh = popen(dest, "w"); + + return fh; +} + +static gboolean +close_print_dest(gboolean to_file, FILE *fh) +{ + /* Close the file or command */ + if (to_file) + return (fclose(fh) == 0); + else + return (pclose(fh) == 0); +} + +#define MAX_PS_LINE_LENGTH 256 + +gboolean +proto_tree_print(print_args_t *print_args, epan_dissect_t *edt, + print_stream_t *stream) +{ + print_data data; + + /* Create the output */ + data.level = 0; + data.stream = stream; + data.success = TRUE; + data.src_list = edt->pi.data_src; + data.encoding = (packet_char_enc)edt->pi.fd->flags.encoding; + data.print_dissections = print_args->print_dissections; + /* If we're printing the entire packet in hex, don't + print uninterpreted data fields in hex as well. */ + data.print_hex_for_data = !print_args->print_hex; + data.edt = edt; + + proto_tree_children_foreach(edt->tree, proto_tree_print_node, &data); + return data.success; +} + +#define MAX_INDENT 160 + +/* Print a tree's data, and any child nodes. */ +static +void proto_tree_print_node(proto_node *node, gpointer data) +{ + field_info *fi = PNODE_FINFO(node); + print_data *pdata = (print_data*) data; + const guint8 *pd; + gchar label_str[ITEM_LABEL_LENGTH]; + gchar *label_ptr; + + /* dissection with an invisible proto tree? */ + g_assert(fi); + + /* Don't print invisible entries. */ + if (PROTO_ITEM_IS_HIDDEN(node)) + return; + + /* Give up if we've already gotten an error. */ + if (!pdata->success) + return; + + /* was a free format label produced? */ + if (fi->rep) { + label_ptr = fi->rep->representation; + } + else { /* no, make a generic label */ + label_ptr = label_str; + proto_item_fill_label(fi, label_str); + } + + if (PROTO_ITEM_IS_GENERATED(node)) { + label_ptr = g_strdup_printf("[%s]", label_ptr); + } + + if (!print_line(pdata->stream, pdata->level, label_ptr)) { + pdata->success = FALSE; + return; + } + + /* + * If -O is specified, only display the protocols which are in the + * lookup table. Only check on the first level: once we start printing + * a tree, print the rest of the subtree. Otherwise we won't print + * subitems whose abbreviation doesn't match the protocol--for example + * text items (whose abbreviation is simply "text"). + */ + if ((output_only_tables != NULL) && (pdata->level == 0) + && (g_hash_table_lookup(output_only_tables, fi->hfinfo->abbrev) == NULL)) { + pdata->success = TRUE; + return; + } + + if (PROTO_ITEM_IS_GENERATED(node)) { + g_free(label_ptr); + } + + /* If it's uninterpreted data, dump it (unless our caller will + be printing the entire packet in hex). */ + if ((fi->hfinfo->id == proto_data) && (pdata->print_hex_for_data)) { + /* + * Find the data for this field. + */ + pd = get_field_data(pdata->src_list, fi); + if (pd) { + if (!print_line(pdata->stream, 0, "")) { + pdata->success = FALSE; + return; + } + if (!print_hex_data_buffer(pdata->stream, pd, + fi->length, pdata->encoding)) { + pdata->success = FALSE; + return; + } + } + } + + /* If we're printing all levels, or if this node is one with a + subtree and its subtree is expanded, recurse into the subtree, + if it exists. */ + g_assert((fi->tree_type >= -1) && (fi->tree_type < num_tree_types)); + if ((pdata->print_dissections == print_dissections_expanded) || + ((pdata->print_dissections == print_dissections_as_displayed) && + (fi->tree_type >= 0) && tree_expanded(fi->tree_type))) { + if (node->first_child != NULL) { + pdata->level++; + proto_tree_children_foreach(node, + proto_tree_print_node, pdata); + pdata->level--; + if (!pdata->success) + return; + } + } +} + +#define PDML2HTML_XSL "pdml2html.xsl" +void +write_pdml_preamble(FILE *fh, const gchar *filename) +{ + time_t t = time(NULL); + char *ts = asctime(localtime(&t)); + + ts[strlen(ts)-1] = 0; /* overwrite \n */ + + fputs("<?xml version=\"1.0\"?>\n", fh); + fputs("<?xml-stylesheet type=\"text/xsl\" href=\"" PDML2HTML_XSL "\"?>\n", fh); + fprintf(fh, "<!-- You can find " PDML2HTML_XSL " in %s or at http://anonsvn.wireshark.org/trunk/wireshark/" PDML2HTML_XSL ". -->\n", get_datafile_dir()); + fputs("<pdml version=\"" PDML_VERSION "\" ", fh); + fprintf(fh, "creator=\"%s/%s\" time=\"%s\" capture_file=\"%s\">\n", PACKAGE, VERSION, ts, filename ? filename : ""); +} + +void +proto_tree_write_pdml(epan_dissect_t *edt, FILE *fh) +{ + write_pdml_data data; + + /* Create the output */ + data.level = 0; + data.fh = fh; + data.src_list = edt->pi.data_src; + data.edt = edt; + + fprintf(fh, "<packet>\n"); + + /* Print a "geninfo" protocol as required by PDML */ + print_pdml_geninfo(edt->tree, fh); + + proto_tree_children_foreach(edt->tree, proto_tree_write_node_pdml, + &data); + + fprintf(fh, "</packet>\n\n"); +} + +/* Write out a tree's data, and any child nodes, as PDML */ +static void +proto_tree_write_node_pdml(proto_node *node, gpointer data) +{ + field_info *fi = PNODE_FINFO(node); + write_pdml_data *pdata = (write_pdml_data*) data; + const gchar *label_ptr; + gchar label_str[ITEM_LABEL_LENGTH]; + char *dfilter_string; + size_t chop_len; + int i; + gboolean wrap_in_fake_protocol; + + /* dissection with an invisible proto tree? */ + g_assert(fi); + + /* Will wrap up top-level field items inside a fake protocol wrapper to + preserve the PDML schema */ + wrap_in_fake_protocol = + (((fi->hfinfo->type != FT_PROTOCOL) || + (fi->hfinfo->id == proto_data)) && + (pdata->level == 0)); + + /* Indent to the correct level */ + for (i = -1; i < pdata->level; i++) { + fputs(" ", pdata->fh); + } + + if (wrap_in_fake_protocol) { + /* Open fake protocol wrapper */ + fputs("<proto name=\"fake-field-wrapper\">\n", pdata->fh); + + /* Indent to increased level before writing out field */ + pdata->level++; + for (i = -1; i < pdata->level; i++) { + fputs(" ", pdata->fh); + } + } + + /* Text label. It's printed as a field with no name. */ + if (fi->hfinfo->id == hf_text_only) { + /* Get the text */ + if (fi->rep) { + label_ptr = fi->rep->representation; + } + else { + label_ptr = ""; + } + + /* Show empty name since it is a required field */ + fputs("<field name=\"", pdata->fh); + fputs("\" show=\"", pdata->fh); + print_escaped_xml(pdata->fh, label_ptr); + + fprintf(pdata->fh, "\" size=\"%d", fi->length); + if (node->parent && node->parent->finfo && (fi->start < node->parent->finfo->start)) { + fprintf(pdata->fh, "\" pos=\"%d", node->parent->finfo->start + fi->start); + } else { + fprintf(pdata->fh, "\" pos=\"%d", fi->start); + } + + fputs("\" value=\"", pdata->fh); + write_pdml_field_hex_value(pdata, fi); + + if (node->first_child != NULL) { + fputs("\">\n", pdata->fh); + } + else { + fputs("\"/>\n", pdata->fh); + } + } + + /* Uninterpreted data, i.e., the "Data" protocol, is + * printed as a field instead of a protocol. */ + else if (fi->hfinfo->id == proto_data) { + + /* Write out field with data */ + fputs("<field name=\"data\" value=\"", pdata->fh); + write_pdml_field_hex_value(pdata, fi); + fputs("\">\n", pdata->fh); + } + /* Normal protocols and fields */ + else { + if ((fi->hfinfo->type == FT_PROTOCOL) && (fi->hfinfo->id != proto_expert)) { + fputs("<proto name=\"", pdata->fh); + } + else { + fputs("<field name=\"", pdata->fh); + } + print_escaped_xml(pdata->fh, fi->hfinfo->abbrev); + +#if 0 + /* PDML spec, see: + * http://www.nbee.org/doku.php?id=netpdl:pdml_specification + * + * the show fields contains things in 'human readable' format + * showname: contains only the name of the field + * show: contains only the data of the field + * showdtl: contains additional details of the field data + * showmap: contains mappings of the field data (e.g. the hostname to an IP address) + * + * XXX - the showname shouldn't contain the field data itself + * (like it's contained in the fi->rep->representation). + * Unfortunately, we don't have the field data representation for + * all fields, so this isn't currently possible */ + fputs("\" showname=\"", pdata->fh); + print_escaped_xml(pdata->fh, fi->hfinfo->name); +#endif + + if (fi->rep) { + fputs("\" showname=\"", pdata->fh); + print_escaped_xml(pdata->fh, fi->rep->representation); + } + else { + label_ptr = label_str; + proto_item_fill_label(fi, label_str); + fputs("\" showname=\"", pdata->fh); + print_escaped_xml(pdata->fh, label_ptr); + } + + if (PROTO_ITEM_IS_HIDDEN(node)) + fprintf(pdata->fh, "\" hide=\"yes"); + + fprintf(pdata->fh, "\" size=\"%d", fi->length); + if (node->parent && node->parent->finfo && (fi->start < node->parent->finfo->start)) { + fprintf(pdata->fh, "\" pos=\"%d", node->parent->finfo->start + fi->start); + } else { + fprintf(pdata->fh, "\" pos=\"%d", fi->start); + } +/* fprintf(pdata->fh, "\" id=\"%d", fi->hfinfo->id);*/ + + /* show, value, and unmaskedvalue attributes */ + switch (fi->hfinfo->type) + { + case FT_PROTOCOL: + break; + case FT_NONE: + fputs("\" show=\"\" value=\"", pdata->fh); + break; + default: + /* XXX - this is a hack until we can just call + * fvalue_to_string_repr() for *all* FT_* types. */ + dfilter_string = proto_construct_match_selected_string(fi, + pdata->edt); + if (dfilter_string != NULL) { + chop_len = strlen(fi->hfinfo->abbrev) + 4; /* for " == " */ + + /* XXX - Remove double-quotes. Again, once we + * can call fvalue_to_string_repr(), we can + * ask it not to produce the version for + * display-filters, and thus, no + * double-quotes. */ + if (dfilter_string[strlen(dfilter_string)-1] == '"') { + dfilter_string[strlen(dfilter_string)-1] = '\0'; + chop_len++; + } + + fputs("\" show=\"", pdata->fh); + print_escaped_xml(pdata->fh, &dfilter_string[chop_len]); + } + + /* + * XXX - should we omit "value" for any fields? + * What should we do for fields whose length is 0? + * They might come from a pseudo-header or from + * the capture header (e.g., time stamps), or + * they might be generated fields. + */ + if (fi->length > 0) { + fputs("\" value=\"", pdata->fh); + + if (fi->hfinfo->bitmask!=0) { + fprintf(pdata->fh, "%X", fvalue_get_uinteger(&fi->value)); + fputs("\" unmaskedvalue=\"", pdata->fh); + write_pdml_field_hex_value(pdata, fi); + } + else { + write_pdml_field_hex_value(pdata, fi); + } + } + } + + if (node->first_child != NULL) { + fputs("\">\n", pdata->fh); + } + else if (fi->hfinfo->id == proto_data) { + fputs("\">\n", pdata->fh); + } + else { + fputs("\"/>\n", pdata->fh); + } + } + + /* We always print all levels for PDML. Recurse here. */ + if (node->first_child != NULL) { + pdata->level++; + proto_tree_children_foreach(node, + proto_tree_write_node_pdml, pdata); + pdata->level--; + } + + /* Take back the extra level we added for fake wrapper protocol */ + if (wrap_in_fake_protocol) { + pdata->level--; + } + + if (node->first_child != NULL) { + /* Indent to correct level */ + for (i = -1; i < pdata->level; i++) { + fputs(" ", pdata->fh); + } + /* Close off current element */ + /* Data and expert "protocols" use simple tags */ + if ((fi->hfinfo->id != proto_data) && (fi->hfinfo->id != proto_expert)) { + if (fi->hfinfo->type == FT_PROTOCOL) { + fputs("</proto>\n", pdata->fh); + } + else { + fputs("</field>\n", pdata->fh); + } + } else { + fputs("</field>\n", pdata->fh); + } + } + + /* Close off fake wrapper protocol */ + if (wrap_in_fake_protocol) { + fputs("</proto>\n", pdata->fh); + } +} + +/* Print info for a 'geninfo' pseudo-protocol. This is required by + * the PDML spec. The information is contained in Wireshark's 'frame' protocol, + * but we produce a 'geninfo' protocol in the PDML to conform to spec. + * The 'frame' protocol follows the 'geninfo' protocol in the PDML. */ +static void +print_pdml_geninfo(proto_tree *tree, FILE *fh) +{ + guint32 num, len, caplen; + nstime_t *timestamp; + GPtrArray *finfo_array; + field_info *frame_finfo; + + /* Get frame protocol's finfo. */ + finfo_array = proto_find_finfo(tree, proto_frame); + if (g_ptr_array_len(finfo_array) < 1) { + return; + } + frame_finfo = (field_info *)finfo_array->pdata[0]; + g_ptr_array_free(finfo_array, TRUE); + + /* frame.number --> geninfo.num */ + finfo_array = proto_find_finfo(tree, hf_frame_number); + if (g_ptr_array_len(finfo_array) < 1) { + return; + } + num = fvalue_get_uinteger(&((field_info*)finfo_array->pdata[0])->value); + g_ptr_array_free(finfo_array, TRUE); + + /* frame.frame_len --> geninfo.len */ + finfo_array = proto_find_finfo(tree, hf_frame_len); + if (g_ptr_array_len(finfo_array) < 1) { + return; + } + len = fvalue_get_uinteger(&((field_info*)finfo_array->pdata[0])->value); + g_ptr_array_free(finfo_array, TRUE); + + /* frame.cap_len --> geninfo.caplen */ + finfo_array = proto_find_finfo(tree, hf_frame_capture_len); + if (g_ptr_array_len(finfo_array) < 1) { + return; + } + caplen = fvalue_get_uinteger(&((field_info*)finfo_array->pdata[0])->value); + g_ptr_array_free(finfo_array, TRUE); + + /* frame.time --> geninfo.timestamp */ + finfo_array = proto_find_finfo(tree, hf_frame_arrival_time); + if (g_ptr_array_len(finfo_array) < 1) { + return; + } + timestamp = (nstime_t *)fvalue_get(&((field_info*)finfo_array->pdata[0])->value); + g_ptr_array_free(finfo_array, TRUE); + + /* Print geninfo start */ + fprintf(fh, + " <proto name=\"geninfo\" pos=\"0\" showname=\"General information\" size=\"%u\">\n", + frame_finfo->length); + + /* Print geninfo.num */ + fprintf(fh, + " <field name=\"num\" pos=\"0\" show=\"%u\" showname=\"Number\" value=\"%x\" size=\"%u\"/>\n", + num, num, frame_finfo->length); + + /* Print geninfo.len */ + fprintf(fh, + " <field name=\"len\" pos=\"0\" show=\"%u\" showname=\"Frame Length\" value=\"%x\" size=\"%u\"/>\n", + len, len, frame_finfo->length); + + /* Print geninfo.caplen */ + fprintf(fh, + " <field name=\"caplen\" pos=\"0\" show=\"%u\" showname=\"Captured Length\" value=\"%x\" size=\"%u\"/>\n", + caplen, caplen, frame_finfo->length); + + /* Print geninfo.timestamp */ + fprintf(fh, + " <field name=\"timestamp\" pos=\"0\" show=\"%s\" showname=\"Captured Time\" value=\"%d.%09d\" size=\"%u\"/>\n", + abs_time_to_str(timestamp, ABSOLUTE_TIME_LOCAL, TRUE), (int) timestamp->secs, timestamp->nsecs, frame_finfo->length); + + /* Print geninfo end */ + fprintf(fh, + " </proto>\n"); +} + +void +write_pdml_finale(FILE *fh) +{ + fputs("</pdml>\n", fh); +} + +void +write_psml_preamble(FILE *fh) +{ + fputs("<?xml version=\"1.0\"?>\n", fh); + fputs("<psml version=\"" PSML_VERSION "\" ", fh); + fprintf(fh, "creator=\"%s/%s\">\n", PACKAGE, VERSION); + write_headers = TRUE; +} + +void +proto_tree_write_psml(epan_dissect_t *edt, FILE *fh) +{ + gint i; + + /* if this is the first packet, we have to create the PSML structure output */ + if (write_headers) { + fprintf(fh, "<structure>\n"); + + for (i = 0; i < edt->pi.cinfo->num_cols; i++) { + fprintf(fh, "<section>"); + print_escaped_xml(fh, edt->pi.cinfo->col_title[i]); + fprintf(fh, "</section>\n"); + } + + fprintf(fh, "</structure>\n\n"); + + write_headers = FALSE; + } + + fprintf(fh, "<packet>\n"); + + for (i = 0; i < edt->pi.cinfo->num_cols; i++) { + fprintf(fh, "<section>"); + print_escaped_xml(fh, edt->pi.cinfo->col_data[i]); + fprintf(fh, "</section>\n"); + } + + fprintf(fh, "</packet>\n\n"); +} + +void +write_psml_finale(FILE *fh) +{ + fputs("</psml>\n", fh); +} + +void +write_csv_preamble(FILE *fh _U_) +{ + write_headers = TRUE; +} + +static gchar *csv_massage_str(const gchar *source, const gchar *exceptions) +{ + gchar *csv_str; + gchar *tmp_str; + + csv_str = g_strescape(source, exceptions); + tmp_str = csv_str; + while ( (tmp_str = strstr(tmp_str, "\\\"")) != NULL ) + *tmp_str = '\"'; + return csv_str; +} + +static void csv_write_str(const char *str, char sep, FILE *fh) +{ + gchar *csv_str; + + csv_str = csv_massage_str(str, NULL); + fprintf(fh, "\"%s\"%c", csv_str, sep); + g_free(csv_str); +} + +void +proto_tree_write_csv(epan_dissect_t *edt, FILE *fh) +{ + gint i; + + /* if this is the first packet, we have to write the CSV header */ + if (write_headers) { + for (i = 0; i < edt->pi.cinfo->num_cols - 1; i++) + csv_write_str(edt->pi.cinfo->col_title[i], ',', fh); + csv_write_str(edt->pi.cinfo->col_title[i], '\n', fh); + write_headers = FALSE; + } + + for (i = 0; i < edt->pi.cinfo->num_cols - 1; i++) + csv_write_str(edt->pi.cinfo->col_data[i], ',', fh); + csv_write_str(edt->pi.cinfo->col_data[i], '\n', fh); +} + +void +write_csv_finale(FILE *fh _U_) +{ + +} + +void +write_carrays_preamble(FILE *fh _U_) +{ + +} + +void +proto_tree_write_carrays(guint32 num, FILE *fh, epan_dissect_t *edt) +{ + guint32 i = 0, src_num = 0; + GSList *src_le; + tvbuff_t *tvb; + const char *name; + const guchar *cp; + guint length; + char ascii[9]; + struct data_source *src; + + for (src_le = edt->pi.data_src; src_le != NULL; src_le = src_le->next) { + memset(ascii, 0, sizeof(ascii)); + src = (struct data_source *)src_le->data; + tvb = get_data_source_tvb(src); + length = tvb_length(tvb); + if (length == 0) + continue; + + cp = tvb_get_ptr(tvb, 0, length); + + name = get_data_source_name(src); + if (name) + fprintf(fh, "/* %s */\n", name); + if (src_num) { + fprintf(fh, "static const unsigned char pkt%u_%u[%u] = {\n", + num, src_num, length); + } else { + fprintf(fh, "static const unsigned char pkt%u[%u] = {\n", + num, length); + } + src_num++; + + for (i = 0; i < length; i++) { + fprintf(fh, "0x%02x", *(cp + i)); + ascii[i % 8] = isprint(*(cp + i)) ? *(cp + i) : '.'; + + if (i == (length - 1)) { + guint rem; + rem = length % 8; + if (rem) { + guint j; + for ( j = 0; j < 8 - rem; j++ ) + fprintf(fh, " "); + } + fprintf(fh, " /* %s */\n};\n\n", ascii); + break; + } + + if (!((i + 1) % 8)) { + fprintf(fh, ", /* %s */\n", ascii); + memset(ascii, 0, sizeof(ascii)); + } + else { + fprintf(fh, ", "); + } + } + } +} + +void +write_carrays_finale(FILE *fh _U_) +{ + +} + +/* + * Find the data source for a specified field, and return a pointer + * to the data in it. Returns NULL if the data is out of bounds. + */ +/* XXX: What am I missing ? + * Why bother searching for fi->ds_tvb for the matching tvb + * in the data_source list ? + * IOW: Why not just use fi->ds_tvb for the arg to tvb_get_ptr() ? + */ + +static const guint8 * +get_field_data(GSList *src_list, field_info *fi) +{ + GSList *src_le; + tvbuff_t *src_tvb; + gint length, tvbuff_length; + struct data_source *src; + + for (src_le = src_list; src_le != NULL; src_le = src_le->next) { + src = (struct data_source *)src_le->data; + src_tvb = get_data_source_tvb(src); + if (fi->ds_tvb == src_tvb) { + /* + * Found it. + * + * XXX - a field can have a length that runs past + * the end of the tvbuff. Ideally, that should + * be fixed when adding an item to the protocol + * tree, but checking the length when doing + * that could be expensive. Until we fix that, + * we'll do the check here. + */ + tvbuff_length = tvb_length_remaining(src_tvb, + fi->start); + if (tvbuff_length < 0) { + return NULL; + } + length = fi->length; + if (length > tvbuff_length) + length = tvbuff_length; + return tvb_get_ptr(src_tvb, fi->start, length); + } + } + g_assert_not_reached(); + return NULL; /* not found */ +} + +/* Print a string, escaping out certain characters that need to + * escaped out for XML. */ +static void +print_escaped_xml(FILE *fh, const char *unescaped_string) +{ + const char *p; + char temp_str[8]; + + for (p = unescaped_string; *p != '\0'; p++) { + switch (*p) { + case '&': + fputs("&", fh); + break; + case '<': + fputs("<", fh); + break; + case '>': + fputs(">", fh); + break; + case '"': + fputs(""", fh); + break; + case '\'': + fputs("'", fh); + break; + default: + if (g_ascii_isprint(*p)) + fputc(*p, fh); + else { + g_snprintf(temp_str, sizeof(temp_str), "\\x%x", (guint8)*p); + fputs(temp_str, fh); + } + } + } +} + +static void +write_pdml_field_hex_value(write_pdml_data *pdata, field_info *fi) +{ + int i; + const guint8 *pd; + + if (!fi->ds_tvb) + return; + + if (fi->length > tvb_length_remaining(fi->ds_tvb, fi->start)) { + fprintf(pdata->fh, "field length invalid!"); + return; + } + + /* Find the data for this field. */ + pd = get_field_data(pdata->src_list, fi); + + if (pd) { + /* Print a simple hex dump */ + for (i = 0 ; i < fi->length; i++) { + fprintf(pdata->fh, "%02x", pd[i]); + } + } +} + +gboolean +print_hex_data(print_stream_t *stream, epan_dissect_t *edt) +{ + gboolean multiple_sources; + GSList *src_le; + tvbuff_t *tvb; + const char *name; + char *line; + const guchar *cp; + guint length; + struct data_source *src; + + /* + * Set "multiple_sources" iff this frame has more than one + * data source; if it does, we need to print the name of + * the data source before printing the data from the + * data source. + */ + multiple_sources = (edt->pi.data_src->next != NULL); + + for (src_le = edt->pi.data_src; src_le != NULL; + src_le = src_le->next) { + src = (struct data_source *)src_le->data; + tvb = get_data_source_tvb(src); + if (multiple_sources) { + name = get_data_source_name(src); + line = g_strdup_printf("%s:", name); + print_line(stream, 0, line); + g_free(line); + } + length = tvb_length(tvb); + if (length == 0) + return TRUE; + cp = tvb_get_ptr(tvb, 0, length); + if (!print_hex_data_buffer(stream, cp, length, + (packet_char_enc)edt->pi.fd->flags.encoding)) + return FALSE; + } + return TRUE; +} + +/* + * This routine is based on a routine created by Dan Lasley + * <DLASLEY@PROMUS.com>. + * + * It was modified for Wireshark by Gilbert Ramirez and others. + */ + +#define MAX_OFFSET_LEN 8 /* max length of hex offset of bytes */ +#define BYTES_PER_LINE 16 /* max byte values printed on a line */ +#define HEX_DUMP_LEN (BYTES_PER_LINE*3) + /* max number of characters hex dump takes - + 2 digits plus trailing blank */ +#define DATA_DUMP_LEN (HEX_DUMP_LEN + 2 + BYTES_PER_LINE) + /* number of characters those bytes take; + 3 characters per byte of hex dump, + 2 blanks separating hex from ASCII, + 1 character per byte of ASCII dump */ +#define MAX_LINE_LEN (MAX_OFFSET_LEN + 2 + DATA_DUMP_LEN) + /* number of characters per line; + offset, 2 blanks separating offset + from data dump, data dump */ + +static gboolean +print_hex_data_buffer(print_stream_t *stream, const guchar *cp, + guint length, packet_char_enc encoding) +{ + register unsigned int ad, i, j, k, l; + guchar c; + gchar line[MAX_LINE_LEN + 1]; + unsigned int use_digits; + + static gchar binhex[16] = { + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; + + /* + * How many of the leading digits of the offset will we supply? + * We always supply at least 4 digits, but if the maximum offset + * won't fit in 4 digits, we use as many digits as will be needed. + */ + if (((length - 1) & 0xF0000000) != 0) + use_digits = 8; /* need all 8 digits */ + else if (((length - 1) & 0x0F000000) != 0) + use_digits = 7; /* need 7 digits */ + else if (((length - 1) & 0x00F00000) != 0) + use_digits = 6; /* need 6 digits */ + else if (((length - 1) & 0x000F0000) != 0) + use_digits = 5; /* need 5 digits */ + else + use_digits = 4; /* we'll supply 4 digits */ + + ad = 0; + i = 0; + j = 0; + k = 0; + while (i < length) { + if ((i & 15) == 0) { + /* + * Start of a new line. + */ + j = 0; + l = use_digits; + do { + l--; + c = (ad >> (l*4)) & 0xF; + line[j++] = binhex[c]; + } while (l != 0); + line[j++] = ' '; + line[j++] = ' '; + memset(line+j, ' ', DATA_DUMP_LEN); + + /* + * Offset in line of ASCII dump. + */ + k = j + HEX_DUMP_LEN + 2; + } + c = *cp++; + line[j++] = binhex[c>>4]; + line[j++] = binhex[c&0xf]; + j++; + if (encoding == PACKET_CHAR_ENC_CHAR_EBCDIC) { + c = EBCDIC_to_ASCII1(c); + } + line[k++] = ((c >= ' ') && (c < 0x7f)) ? c : '.'; + i++; + if (((i & 15) == 0) || (i == length)) { + /* + * We'll be starting a new line, or + * we're finished printing this buffer; + * dump out the line we've constructed, + * and advance the offset. + */ + line[k] = '\0'; + if (!print_line(stream, 0, line)) + return FALSE; + ad += 16; + } + } + return TRUE; +} + +static +void ps_clean_string(char *out, const char *in, int outbuf_size) +{ + int rd, wr; + char c; + + if (in == NULL) { + out[0] = '\0'; + return; + } + + for (rd = 0, wr = 0 ; wr < outbuf_size; rd++, wr++ ) { + c = in[rd]; + switch (c) { + case '(': + case ')': + case '\\': + out[wr] = '\\'; + out[++wr] = c; + break; + + default: + out[wr] = c; + break; + } + + if (c == 0) { + break; + } + } +} + +/* Some formats need stuff at the beginning of the output */ +gboolean +print_preamble(print_stream_t *self, gchar *filename, const char *version_string) +{ + return self->ops->print_preamble ? (self->ops->print_preamble)(self, filename, version_string) : TRUE; +} + +gboolean +print_line(print_stream_t *self, int indent, const char *line) +{ + return (self->ops->print_line)(self, indent, line); +} + +/* Insert bookmark */ +gboolean +print_bookmark(print_stream_t *self, const gchar *name, const gchar *title) +{ + return self->ops->print_bookmark ? (self->ops->print_bookmark)(self, name, title) : TRUE; +} + +gboolean +new_page(print_stream_t *self) +{ + return self->ops->new_page ? (self->ops->new_page)(self) : TRUE; +} + +/* Some formats need stuff at the end of the output */ +gboolean +print_finale(print_stream_t *self) +{ + return self->ops->print_finale ? (self->ops->print_finale)(self) : TRUE; +} + +gboolean +destroy_print_stream(print_stream_t *self) +{ + return self->ops->destroy ? (self->ops->destroy)(self) : TRUE; +} + +typedef struct { + gboolean to_file; + FILE *fh; +} output_text; + +static gboolean +print_line_text(print_stream_t *self, int indent, const char *line) +{ + output_text *output = (output_text *)self->data; + char space[MAX_INDENT+1]; + int i; + int num_spaces; + + /* Prepare the tabs for printing, depending on tree level */ + num_spaces = indent * 4; + if (num_spaces > MAX_INDENT) { + num_spaces = MAX_INDENT; + } + for (i = 0; i < num_spaces; i++) { + space[i] = ' '; + } + /* The string is NUL-terminated */ + space[num_spaces] = '\0'; + + fputs(space, output->fh); + fputs(line, output->fh); + putc('\n', output->fh); + return !ferror(output->fh); +} + +static gboolean +new_page_text(print_stream_t *self) +{ + output_text *output = (output_text *)self->data; + + fputs("\f", output->fh); + return !ferror(output->fh); +} + +static gboolean +destroy_text(print_stream_t *self) +{ + output_text *output = (output_text *)self->data; + gboolean ret; + + ret = close_print_dest(output->to_file, output->fh); + g_free(output); + g_free(self); + return ret; +} + +static const print_stream_ops_t print_text_ops = { + NULL, /* preamble */ + print_line_text, + NULL, /* bookmark */ + new_page_text, + NULL, /* finale */ + destroy_text +}; + +static print_stream_t * +print_stream_text_alloc(gboolean to_file, FILE *fh) +{ + print_stream_t *stream; + output_text *output; + + output = (output_text *)g_malloc(sizeof *output); + output->to_file = to_file; + output->fh = fh; + stream = (print_stream_t *)g_malloc(sizeof (print_stream_t)); + stream->ops = &print_text_ops; + stream->data = output; + + return stream; +} + +print_stream_t * +print_stream_text_new(gboolean to_file, const char *dest) +{ + FILE *fh; + + fh = open_print_dest(to_file, dest); + if (fh == NULL) + return NULL; + + return print_stream_text_alloc(to_file, fh); +} + +print_stream_t * +print_stream_text_stdio_new(FILE *fh) +{ + return print_stream_text_alloc(TRUE, fh); +} + +typedef struct { + gboolean to_file; + FILE *fh; +} output_ps; + +static gboolean +print_preamble_ps(print_stream_t *self, gchar *filename, const char *version_string) +{ + output_ps *output = (output_ps *)self->data; + char psbuffer[MAX_PS_LINE_LENGTH]; /* static sized buffer! */ + + print_ps_preamble(output->fh); + + fputs("%% the page title\n", output->fh); + ps_clean_string(psbuffer, filename, MAX_PS_LINE_LENGTH); + fprintf(output->fh, "/ws_pagetitle (%s - Wireshark " VERSION "%s) def\n", psbuffer, version_string); + fputs("\n", output->fh); + return !ferror(output->fh); +} + +static gboolean +print_line_ps(print_stream_t *self, int indent, const char *line) +{ + output_ps *output = (output_ps *)self->data; + char psbuffer[MAX_PS_LINE_LENGTH]; /* static sized buffer! */ + + ps_clean_string(psbuffer, line, MAX_PS_LINE_LENGTH); + fprintf(output->fh, "%d (%s) putline\n", indent, psbuffer); + return !ferror(output->fh); +} + +static gboolean +print_bookmark_ps(print_stream_t *self, const gchar *name, const gchar *title) +{ + output_ps *output = (output_ps *)self->data; + char psbuffer[MAX_PS_LINE_LENGTH]; /* static sized buffer! */ + + /* + * See the Adobe "pdfmark reference": + * + * http://partners.adobe.com/asn/acrobat/docs/pdfmark.pdf + * + * The pdfmark stuff tells code that turns PostScript into PDF + * things that it should do. + * + * The /OUT stuff creates a bookmark that goes to the + * destination with "name" as the name and "title" as the title. + * + * The "/DEST" creates the destination. + */ + ps_clean_string(psbuffer, title, MAX_PS_LINE_LENGTH); + fprintf(output->fh, "[/Dest /%s /Title (%s) /OUT pdfmark\n", name, + psbuffer); + fputs("[/View [/XYZ -4 currentpoint matrix currentmatrix matrix defaultmatrix\n", + output->fh); + fputs("matrix invertmatrix matrix concatmatrix transform exch pop 20 add null]\n", + output->fh); + fprintf(output->fh, "/Dest /%s /DEST pdfmark\n", name); + return !ferror(output->fh); +} + +static gboolean +new_page_ps(print_stream_t *self) +{ + output_ps *output = (output_ps *)self->data; + + fputs("formfeed\n", output->fh); + return !ferror(output->fh); +} + +static gboolean +print_finale_ps(print_stream_t *self) +{ + output_ps *output = (output_ps *)self->data; + + print_ps_finale(output->fh); + return !ferror(output->fh); +} + +static gboolean +destroy_ps(print_stream_t *self) +{ + output_ps *output = (output_ps *)self->data; + gboolean ret; + + ret = close_print_dest(output->to_file, output->fh); + g_free(output); + g_free(self); + return ret; +} + +static const print_stream_ops_t print_ps_ops = { + print_preamble_ps, + print_line_ps, + print_bookmark_ps, + new_page_ps, + print_finale_ps, + destroy_ps +}; + +static print_stream_t * +print_stream_ps_alloc(gboolean to_file, FILE *fh) +{ + print_stream_t *stream; + output_ps *output; + + output = (output_ps *)g_malloc(sizeof *output); + output->to_file = to_file; + output->fh = fh; + stream = (print_stream_t *)g_malloc(sizeof (print_stream_t)); + stream->ops = &print_ps_ops; + stream->data = output; + + return stream; +} + +print_stream_t * +print_stream_ps_new(gboolean to_file, const char *dest) +{ + FILE *fh; + + fh = open_print_dest(to_file, dest); + if (fh == NULL) + return NULL; + + return print_stream_ps_alloc(to_file, fh); +} + +print_stream_t * +print_stream_ps_stdio_new(FILE *fh) +{ + return print_stream_ps_alloc(TRUE, fh); +} + +output_fields_t* output_fields_new(void) +{ + output_fields_t* fields = g_new(output_fields_t, 1); + fields->print_header = FALSE; + fields->separator = '\t'; + fields->occurrence = 'a'; + fields->aggregator = ','; + fields->fields = NULL; /*Do lazy initialisation */ + fields->field_indicies = NULL; + fields->field_values = NULL; + fields->quote ='\0'; + fields->includes_col_fields = FALSE; + return fields; +} + +gsize output_fields_num_fields(output_fields_t* fields) +{ + g_assert(fields); + + if (NULL == fields->fields) { + return 0; + } else { + return fields->fields->len; + } +} + +void output_fields_free(output_fields_t* fields) +{ + g_assert(fields); + + if (NULL != fields->fields) { + gsize i; + + if (NULL != fields->field_indicies) { + /* Keys are stored in fields->fields, values are + * integers. + */ + g_hash_table_destroy(fields->field_indicies); + } + + if (NULL != fields->field_values) { + g_free(fields->field_values); + } + + for(i = 0; i < fields->fields->len; ++i) { + gchar* field = (gchar *)g_ptr_array_index(fields->fields,i); + g_free(field); + } + g_ptr_array_free(fields->fields, TRUE); + } + + g_free(fields); +} + +#define COLUMN_FIELD_FILTER "col." + +void output_fields_add(output_fields_t *fields, const gchar *field) +{ + gchar *field_copy; + + g_assert(fields); + g_assert(field); + + + if (NULL == fields->fields) { + fields->fields = g_ptr_array_new(); + } + + field_copy = g_strdup(field); + + g_ptr_array_add(fields->fields, field_copy); + + /* See if we have a column as a field entry */ + if (!strncmp(field, COLUMN_FIELD_FILTER, strlen(COLUMN_FIELD_FILTER))) + fields->includes_col_fields = TRUE; + +} + +gboolean output_fields_set_option(output_fields_t *info, gchar *option) +{ + const gchar *option_name; + const gchar *option_value; + + g_assert(info); + g_assert(option); + + if ('\0' == *option) { + return FALSE; /* Is this guarded against by option parsing? */ + } + option_name = strtok(option, "="); + if (!option_name) { + return FALSE; + } + option_value = option + strlen(option_name) + 1; + if (0 == strcmp(option_name, "header")) { + switch (NULL == option_value ? '\0' : *option_value) { + case 'n': + info->print_header = FALSE; + break; + case 'y': + info->print_header = TRUE; + break; + default: + return FALSE; + } + return TRUE; + } + + if (0 == strcmp(option_name, "separator")) { + switch (NULL == option_value ? '\0' : *option_value) { + case '\0': + return FALSE; + case '/': + switch (*++option_value) { + case 't': + info->separator = '\t'; + break; + case 's': + info->separator = ' '; + break; + default: + info->separator = '\\'; + } + break; + default: + info->separator = *option_value; + break; + } + return TRUE; + } + + if (0 == strcmp(option_name, "occurrence")) { + switch (NULL == option_value ? '\0' : *option_value) { + case 'f': + case 'l': + case 'a': + info->occurrence = *option_value; + break; + default: + return FALSE; + } + return TRUE; + } + + if (0 == strcmp(option_name, "aggregator")) { + switch (NULL == option_value ? '\0' : *option_value) { + case '\0': + return FALSE; + case '/': + switch (*++option_value) { + case 's': + info->aggregator = ' '; + break; + default: + info->aggregator = '\\'; + } + break; + default: + info->aggregator = *option_value; + break; + } + return TRUE; + } + + if (0 == strcmp(option_name, "quote")) { + switch (NULL == option_value ? '\0' : *option_value) { + default: /* Fall through */ + case '\0': + info->quote = '\0'; + return FALSE; + case 'd': + info->quote = '"'; + break; + case 's': + info->quote = '\''; + break; + case 'n': + info->quote = '\0'; + break; + } + return TRUE; + } + + return FALSE; +} + +void output_fields_list_options(FILE *fh) +{ + fprintf(fh, "TShark: The available options for field output \"E\" are:\n"); + fputs("header=y|n Print field abbreviations as first line of output (def: N: no)\n", fh); + fputs("separator=/t|/s|<character> Set the separator to use;\n \"/t\" = tab, \"/s\" = space (def: /t: tab)\n", fh); + fputs("occurrence=f|l|a Select the occurrence of a field to use;\n \"f\" = first, \"l\" = last, \"a\" = all (def: a: all)\n", fh); + fputs("aggregator=,|/s|<character> Set the aggregator to use;\n \",\" = comma, \"/s\" = space (def: ,: comma)\n", fh); + fputs("quote=d|s|n Print either d: double-quotes, s: single quotes or \n n: no quotes around field values (def: n: none)\n", fh); +} + +gboolean output_fields_has_cols(output_fields_t* fields) +{ + g_assert(fields); + return fields->includes_col_fields; +} + +void write_fields_preamble(output_fields_t* fields, FILE *fh) +{ + gsize i; + + g_assert(fields); + g_assert(fh); + g_assert(fields->fields); + + if (!fields->print_header) { + return; + } + + for(i = 0; i < fields->fields->len; ++i) { + const gchar* field = (const gchar *)g_ptr_array_index(fields->fields,i); + if (i != 0 ) { + fputc(fields->separator, fh); + } + fputs(field, fh); + } + fputc('\n', fh); +} + +static void format_field_values(output_fields_t* fields, gpointer field_index, const gchar* value) +{ + guint indx; + GPtrArray* fv_p; + + if ((NULL == value) || ('\0' == *value)) + return; + + /* Unwrap change made to disambiguiate zero / null */ + indx = GPOINTER_TO_UINT(field_index) - 1; + + if (fields->field_values[indx] == NULL) { + fields->field_values[indx] = g_ptr_array_new(); + } + + /* Essentially: fieldvalues[indx] is a 'GPtrArray *' with each array entry */ + /* pointing to a string which is (part of) the final output string. */ + + fv_p = fields->field_values[indx]; + + switch (fields->occurrence) { + case 'f': + /* print the value of only the first occurrence of the field */ + if (g_ptr_array_len(fv_p) != 0) + return; + break; + case 'l': + /* print the value of only the last occurrence of the field */ + g_ptr_array_set_size(fv_p, 0); + break; + case 'a': + /* print the value of all accurrences of the field */ + /* If not the first, add the 'aggregator' */ + if (g_ptr_array_len(fv_p) > 0) { + g_ptr_array_add(fv_p, (gpointer)ep_strdup_printf("%c", fields->aggregator)); + } + break; + default: + g_assert_not_reached(); + break; + } + + g_ptr_array_add(fv_p, (gpointer)value); +} + +static void proto_tree_get_node_field_values(proto_node *node, gpointer data) +{ + write_field_data_t *call_data; + field_info *fi; + gpointer field_index; + + call_data = (write_field_data_t *)data; + fi = PNODE_FINFO(node); + + /* dissection with an invisible proto tree? */ + g_assert(fi); + + field_index = g_hash_table_lookup(call_data->fields->field_indicies, fi->hfinfo->abbrev); + if (NULL != field_index) { + format_field_values(call_data->fields, field_index, + get_node_field_value(fi, call_data->edt) /* static or ep_alloc'd string */ + ); + } + + /* Recurse here. */ + if (node->first_child != NULL) { + proto_tree_children_foreach(node, proto_tree_get_node_field_values, + call_data); + } +} + +void proto_tree_write_fields(output_fields_t *fields, epan_dissect_t *edt, column_info *cinfo, FILE *fh) +{ + gsize i; + gint col; + gchar *col_name; + gpointer field_index; + + write_field_data_t data; + + g_assert(fields); + g_assert(fields->fields); + g_assert(edt); + g_assert(fh); + + data.fields = fields; + data.edt = edt; + + if (NULL == fields->field_indicies) { + /* Prepare a lookup table from string abbreviation for field to its index. */ + fields->field_indicies = g_hash_table_new(g_str_hash, g_str_equal); + + i = 0; + while (i < fields->fields->len) { + gchar *field = (gchar *)g_ptr_array_index(fields->fields, i); + /* Store field indicies +1 so that zero is not a valid value, + * and can be distinguished from NULL as a pointer. + */ + ++i; + g_hash_table_insert(fields->field_indicies, field, GUINT_TO_POINTER(i)); + } + } + + /* Array buffer to store values for this packet */ + /* Allocate an array for the 'GPtrarray *' the first time */ + /* ths function is invoked for a file; */ + /* Any and all 'GPtrArray *' are freed (after use) each */ + /* time (each packet) this function is invoked for a flle. */ + /* XXX: ToDo: use packet-scope'd memory & (if/when implemented) wmem ptr_array */ + if (NULL == fields->field_values) + fields->field_values = g_new0(GPtrArray*, fields->fields->len); /* free'd in output_fields_free() */ + + proto_tree_children_foreach(edt->tree, proto_tree_get_node_field_values, + &data); + + if (fields->includes_col_fields) { + for (col = 0; col < cinfo->num_cols; col++) { + /* Prepend COLUMN_FIELD_FILTER as the field name */ + col_name = ep_strdup_printf("%s%s", COLUMN_FIELD_FILTER, cinfo->col_title[col]); + field_index = g_hash_table_lookup(fields->field_indicies, col_name); + + if (NULL != field_index) { + format_field_values(fields, field_index, cinfo->col_data[col]); + } + } + } + + for(i = 0; i < fields->fields->len; ++i) { + if (0 != i) { + fputc(fields->separator, fh); + } + if (NULL != fields->field_values[i]) { + GPtrArray *fv_p; + gsize j; + fv_p = fields->field_values[i]; + if (fields->quote != '\0') { + fputc(fields->quote, fh); + } + + /* Output the array of (partial) field values */ + for (j = 0; j < g_ptr_array_len(fv_p); j++ ) { + fputs((gchar *)g_ptr_array_index(fv_p, j), fh); + } + if (fields->quote != '\0') { + fputc(fields->quote, fh); + } + g_ptr_array_free(fv_p, TRUE); /* get ready for the next packet */ + fields->field_values[i] = NULL; + } + } +} + +void write_fields_finale(output_fields_t* fields _U_ , FILE *fh _U_) +{ + /* Nothing to do */ +} + +/* Returns an ep_alloced string or a static constant*/ +const gchar* get_node_field_value(field_info* fi, epan_dissect_t* edt) +{ + if (fi->hfinfo->id == hf_text_only) { + /* Text label. + * Get the text */ + if (fi->rep) { + return fi->rep->representation; + } + else { + return get_field_hex_value(edt->pi.data_src, fi); + } + } + else if (fi->hfinfo->id == proto_data) { + /* Uninterpreted data, i.e., the "Data" protocol, is + * printed as a field instead of a protocol. */ + return get_field_hex_value(edt->pi.data_src, fi); + } + else { + /* Normal protocols and fields */ + gchar *dfilter_string; + size_t chop_len; + + switch (fi->hfinfo->type) + { + case FT_PROTOCOL: + /* Print out the full details for the protocol. */ + if (fi->rep) { + return fi->rep->representation; + } else { + /* Just print out the protocol abbreviation */ + return fi->hfinfo->abbrev; + } + case FT_NONE: + /* Return "1" so that the presence of a field of type + * FT_NONE can be checked when using -T fields */ + return "1"; + default: + /* XXX - this is a hack until we can just call + * fvalue_to_string_repr() for *all* FT_* types. */ + dfilter_string = proto_construct_match_selected_string(fi, + edt); + if (dfilter_string != NULL) { + chop_len = strlen(fi->hfinfo->abbrev) + 4; /* for " == " */ + + /* XXX - Remove double-quotes. Again, once we + * can call fvalue_to_string_repr(), we can + * ask it not to produce the version for + * display-filters, and thus, no + * double-quotes. */ + if (dfilter_string[strlen(dfilter_string)-1] == '"') { + dfilter_string[strlen(dfilter_string)-1] = '\0'; + chop_len++; + } + + return &(dfilter_string[chop_len]); + } else { + return get_field_hex_value(edt->pi.data_src, fi); + } + } + } +} + +static const gchar* +get_field_hex_value(GSList *src_list, field_info *fi) +{ + const guint8 *pd; + + if (!fi->ds_tvb) + return NULL; + + if (fi->length > tvb_length_remaining(fi->ds_tvb, fi->start)) { + return "field length invalid!"; + } + + /* Find the data for this field. */ + pd = get_field_data(src_list, fi); + + if (pd) { + int i; + gchar *buffer; + gchar *p; + int len; + const int chars_per_byte = 2; + + len = chars_per_byte * fi->length; + buffer = ep_alloc_array(gchar, len + 1); + buffer[len] = '\0'; /* Ensure NULL termination in bad cases */ + p = buffer; + /* Print a simple hex dump */ + for (i = 0 ; i < fi->length; i++) { + g_snprintf(p, chars_per_byte+1, "%02x", pd[i]); + p += chars_per_byte; + } + return buffer; + } else { + return NULL; + } +} + |