forked from osmocom/wireshark
236 lines
4.4 KiB
C
236 lines
4.4 KiB
C
/*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 2001 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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/* The ideas in this code came from Ed Warnicke's original implementation
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* of dranges for the old display filter code (Ethereal 0.8.15 and before).
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* The code is different, but definitely inspired by his code.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/proto.h>
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#include "sttype-field.h"
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#include <wsutil/ws_assert.h>
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typedef struct {
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guint32 magic;
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header_field_info *hfinfo;
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drange_t *drange;
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gboolean raw;
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} field_t;
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#define FIELD_MAGIC 0xfc2002cf
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static gpointer
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field_new(gpointer hfinfo)
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{
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field_t *field;
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field = g_new(field_t, 1);
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field->magic = FIELD_MAGIC;
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field->hfinfo = hfinfo;
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field->drange = NULL;
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field->raw = FALSE;
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return field;
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}
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static gpointer
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field_dup(gconstpointer data)
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{
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const field_t *org = data;
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field_t *field;
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ws_assert_magic(org, FIELD_MAGIC);
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field = field_new(NULL);
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field->hfinfo = org->hfinfo;
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field->drange = drange_dup(org->drange);
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field->raw = org->raw;
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return field;
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}
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static void
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field_free(gpointer data)
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{
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field_t *field = data;
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ws_assert_magic(field, FIELD_MAGIC);
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if (field->drange)
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drange_free(field->drange);
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g_free(field);
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}
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static char *
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field_tostr(const void *data, gboolean pretty _U_)
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{
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const field_t *field = data;
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ws_assert_magic(field, FIELD_MAGIC);
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wmem_strbuf_t *repr;
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char *drange_str = NULL;
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repr = wmem_strbuf_new(NULL, NULL);
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if (field->raw) {
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wmem_strbuf_append_c(repr, '@');
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}
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wmem_strbuf_append(repr, field->hfinfo->abbrev);
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if (field->drange) {
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drange_str = drange_tostr(field->drange);
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wmem_strbuf_append_printf(repr, "#[%s]", drange_str);
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g_free(drange_str);
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}
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if (field->raw) {
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wmem_strbuf_append(repr, " <FT_BYTES>");
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}
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else {
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wmem_strbuf_append_printf(repr, " <%s>",
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ftype_name(field->hfinfo->type));
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}
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return wmem_strbuf_finalize(repr);
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}
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header_field_info *
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sttype_field_hfinfo(stnode_t *node)
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{
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field_t *field = node->data;
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ws_assert_magic(field, FIELD_MAGIC);
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return field->hfinfo;
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}
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ftenum_t
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sttype_field_ftenum(stnode_t *node)
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{
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field_t *field = node->data;
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ws_assert_magic(field, FIELD_MAGIC);
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if (field->raw)
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return FT_BYTES;
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return field->hfinfo->type;
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}
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drange_t *
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sttype_field_drange(stnode_t *node)
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{
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field_t *field = node->data;
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ws_assert_magic(field, FIELD_MAGIC);
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return field->drange;
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}
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gboolean
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sttype_field_raw(stnode_t *node)
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{
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field_t *field = node->data;
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ws_assert_magic(field, FIELD_MAGIC);
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return field->raw;
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}
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drange_t *
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sttype_field_drange_steal(stnode_t *node)
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{
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field_t *field;
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drange_t *dr;
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field = stnode_data(node);
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ws_assert_magic(field, FIELD_MAGIC);
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dr = field->drange;
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field->drange = NULL;
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return dr;
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}
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/* Set a field */
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void
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sttype_field_set_range(stnode_t *node, GSList* drange_list)
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{
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field_t *field = stnode_data(node);
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ws_assert_magic(field, FIELD_MAGIC);
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ws_assert(field->drange == NULL);
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field->drange = drange_new_from_list(drange_list);
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}
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void
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sttype_field_set_range1(stnode_t *node, drange_node *rn)
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{
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field_t *field = stnode_data(node);
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ws_assert_magic(field, FIELD_MAGIC);
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ws_assert(field->drange == NULL);
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field->drange = drange_new(rn);
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}
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void
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sttype_field_set_drange(stnode_t *node, drange_t *dr)
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{
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field_t *field = stnode_data(node);
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ws_assert_magic(field, FIELD_MAGIC);
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ws_assert(field->drange == NULL);
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field->drange = dr;
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}
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void
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sttype_field_set_raw(stnode_t *node, gboolean raw)
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{
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field_t *field = stnode_data(node);
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ws_assert_magic(field, FIELD_MAGIC);
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field->raw = raw;
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}
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char *
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sttype_field_set_number(stnode_t *node, const char *number_str)
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{
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char *err_msg = NULL;
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drange_node *rn = drange_node_from_str(number_str, &err_msg);
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if (err_msg != NULL)
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return err_msg;
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sttype_field_set_range1(node, rn);
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return NULL;
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}
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void
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sttype_register_field(void)
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{
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static sttype_t field_type = {
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STTYPE_FIELD,
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"FIELD",
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field_new,
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field_free,
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field_dup,
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field_tostr
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};
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static sttype_t reference_type = {
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STTYPE_REFERENCE,
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"REFERENCE",
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field_new,
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field_free,
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field_dup,
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field_tostr
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};
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sttype_register(&field_type);
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sttype_register(&reference_type);
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}
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/*
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* Editor modelines - https://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 8
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* tab-width: 8
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* indent-tabs-mode: t
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* End:
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*
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* vi: set shiftwidth=8 tabstop=8 noexpandtab:
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* :indentSize=8:tabSize=8:noTabs=false:
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*/
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