363 lines
10 KiB
C
363 lines
10 KiB
C
/* packet-isdn-sup-template.c
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* Routines for ETSI Integrated Services Digital Network (ISDN)
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* supplementary services
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* Copyright 2013, Anders Broman <anders.broman@ericsson.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* References: ETSI 300 374
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include "packet-ber.h"
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#define PNAME "ISDN supplementary services"
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#define PSNAME "ISDN_SUP"
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#define PFNAME "isdn_sup"
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void proto_register_isdn_sup(void);
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void proto_reg_handoff_isdn_sup(void);
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#include "packet-isdn-sup-val.h"
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/* Initialize the protocol and registered fields */
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static int proto_isdn_sup = -1;
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static int hf_isdn_sup_operation = -1;
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static int hf_isdn_sup_error = -1;
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/* Global variables */
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#if 0
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/* ROSE context */
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static rose_ctx_t isdn_sup_rose_ctx;
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#endif
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typedef struct _isdn_sup_op_t {
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gint32 opcode;
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new_dissector_t arg_pdu;
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new_dissector_t res_pdu;
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} isdn_sup_op_t;
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typedef struct _isdn_global_sup_op_t {
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const char* oid;
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new_dissector_t arg_pdu;
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new_dissector_t res_pdu;
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} isdn_sup_global_op_t;
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typedef struct isdn_sup_err_t {
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gint32 errcode;
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new_dissector_t err_pdu;
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} isdn_sup_err_t;
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static const value_string isdn_sup_str_operation[] = {
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#include "packet-isdn-sup-table10.c"
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{ 0, NULL}
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};
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static const value_string isdn_sup_str_error[] = {
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#include "packet-isdn-sup-table20.c"
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{ 0, NULL}
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};
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static int hf_isdn_sup = -1;
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#include "packet-isdn-sup-hf.c"
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/* Initialize the subtree pointers */
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static gint ett_isdn_sup = -1;
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#include "packet-isdn-sup-ett.c"
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/* Preference settings default */
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/* Global variables */
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#include "packet-isdn-sup-fn.c"
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static const isdn_sup_op_t isdn_sup_op_tab[] = {
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#include "packet-isdn-sup-table11.c"
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};
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static const isdn_sup_global_op_t isdn_sup_global_op_tab[] = {
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#include "packet-isdn-sup-table31.c"
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};
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static const isdn_sup_err_t isdn_sup_err_tab[] = {
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#include "packet-isdn-sup-table21.c"
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};
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static const isdn_sup_op_t *get_op(gint32 opcode) {
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int i;
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/* search from the end to get the last occurrence if the operation is redefined in some newer specification */
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for (i = array_length(isdn_sup_op_tab) - 1; i >= 0; i--)
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if (isdn_sup_op_tab[i].opcode == opcode)
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return &isdn_sup_op_tab[i];
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return NULL;
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}
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static const isdn_sup_err_t *get_err(gint32 errcode) {
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int i;
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/* search from the end to get the last occurrence if the operation is redefined in some newer specification */
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for (i = array_length(isdn_sup_err_tab) - 1; i >= 0; i--)
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if (isdn_sup_err_tab[i].errcode == errcode)
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return &isdn_sup_err_tab[i];
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return NULL;
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}
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/*--- dissect_isdn_sup_arg ------------------------------------------------------*/
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static int
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dissect_isdn_sup_arg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) {
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int offset = 0;
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rose_ctx_t *rctx;
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gint32 opcode = 0;
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const gchar *p;
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const isdn_sup_op_t *op_ptr;
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proto_item *ti;
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proto_tree *isdn_sup_tree;
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/* Reject the packet if data is NULL */
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if (data == NULL)
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return 0;
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rctx = get_rose_ctx(data);
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DISSECTOR_ASSERT(rctx);
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if (rctx->d.pdu != 1) /* invoke */
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return offset;
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if (rctx->d.code == 0) { /* local */
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opcode = rctx->d.code_local;
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} else {
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return offset;
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}
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op_ptr = get_op(opcode);
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if (!op_ptr)
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return offset;
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ti = proto_tree_add_item(tree, proto_isdn_sup, tvb, offset, tvb_length(tvb), ENC_NA);
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isdn_sup_tree = proto_item_add_subtree(ti, ett_isdn_sup);
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proto_tree_add_uint(isdn_sup_tree, hf_isdn_sup_operation, tvb, 0, 0, opcode);
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p = try_val_to_str(opcode, VALS(isdn_sup_str_operation));
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if (p) {
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proto_item_append_text(ti, ": %s", p);
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proto_item_append_text(rctx->d.code_item, " - %s", p);
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if (rctx->apdu_depth >= 0)
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proto_item_append_text(proto_item_get_parent_nth(proto_tree_get_parent(tree), rctx->apdu_depth), " %s", p);
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}
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if (op_ptr->arg_pdu)
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offset = op_ptr->arg_pdu(tvb, pinfo, isdn_sup_tree, NULL);
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else
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if (tvb_length_remaining(tvb, offset) > 0) {
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proto_tree_add_text(isdn_sup_tree, tvb, offset, -1, "UNSUPPORTED ARGUMENT TYPE (ETSI Sup)");
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offset += tvb_length_remaining(tvb, offset);
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}
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return offset;
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}
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/*--- dissect_isdn_sup_res -------------------------------------------------------*/
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static int
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dissect_isdn_sup_res(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) {
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gint offset = 0;
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rose_ctx_t *rctx;
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gint32 opcode = 0;
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const gchar *p;
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const isdn_sup_op_t *op_ptr;
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proto_item *ti;
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proto_tree *isdn_sup_tree;
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/* Reject the packet if data is NULL */
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if (data == NULL)
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return 0;
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rctx = get_rose_ctx(data);
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DISSECTOR_ASSERT(rctx);
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if (rctx->d.pdu != 2) /* returnResult */
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return offset;
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if (rctx->d.code != 0) /* local */
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return offset;
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opcode = rctx->d.code_local;
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op_ptr = get_op(opcode);
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if (!op_ptr)
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return offset;
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ti = proto_tree_add_item(tree, proto_isdn_sup, tvb, offset, tvb_length(tvb), ENC_NA);
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isdn_sup_tree = proto_item_add_subtree(ti, ett_isdn_sup);
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proto_tree_add_uint(isdn_sup_tree, hf_isdn_sup_operation, tvb, 0, 0, opcode);
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p = try_val_to_str(opcode, VALS(isdn_sup_str_operation));
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if (p) {
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proto_item_append_text(ti, ": %s", p);
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proto_item_append_text(rctx->d.code_item, " - %s", p);
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if (rctx->apdu_depth >= 0)
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proto_item_append_text(proto_item_get_parent_nth(proto_tree_get_parent(tree), rctx->apdu_depth), " %s", p);
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}
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if (op_ptr->res_pdu)
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offset = op_ptr->res_pdu(tvb, pinfo, isdn_sup_tree, NULL);
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else
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if (tvb_length_remaining(tvb, offset) > 0) {
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proto_tree_add_text(isdn_sup_tree, tvb, offset, -1, "UNSUPPORTED RESULT TYPE (ETSI sup)");
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offset += tvb_length_remaining(tvb, offset);
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}
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return offset;
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}
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/*--- dissect_isdn_sup_err ------------------------------------------------------*/
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static int
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dissect_isdn_sup_err(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) {
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int offset = 0;
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rose_ctx_t *rctx;
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gint32 errcode;
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const isdn_sup_err_t *err_ptr;
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const gchar *p;
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proto_item *ti;
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proto_tree *isdn_sup_tree;
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/* Reject the packet if data is NULL */
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if (data == NULL)
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return 0;
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rctx = get_rose_ctx(data);
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DISSECTOR_ASSERT(rctx);
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if (rctx->d.pdu != 3) /* returnError */
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return offset;
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if (rctx->d.code != 0) /* local */
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return offset;
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errcode = rctx->d.code_local;
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err_ptr = get_err(errcode);
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if (!err_ptr)
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return offset;
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ti = proto_tree_add_item(tree, proto_isdn_sup, tvb, offset, tvb_length(tvb), ENC_NA);
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isdn_sup_tree = proto_item_add_subtree(ti, ett_isdn_sup);
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proto_tree_add_uint(isdn_sup_tree, hf_isdn_sup_error, tvb, 0, 0, errcode);
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p = try_val_to_str(errcode, VALS(isdn_sup_str_error));
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if (p) {
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proto_item_append_text(ti, ": %s", p);
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proto_item_append_text(rctx->d.code_item, " - %s", p);
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if (rctx->apdu_depth >= 0)
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proto_item_append_text(proto_item_get_parent_nth(proto_tree_get_parent(tree), rctx->apdu_depth), " %s", p);
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}
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if (err_ptr->err_pdu)
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offset = err_ptr->err_pdu(tvb, pinfo, isdn_sup_tree, NULL);
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else
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if (tvb_length_remaining(tvb, offset) > 0) {
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proto_tree_add_text(isdn_sup_tree, tvb, offset, -1, "UNSUPPORTED ERROR TYPE (ETSI sup)");
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offset += tvb_length_remaining(tvb, offset);
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}
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return offset;
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}
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/*--- proto_reg_handoff_isdn_sup ---------------------------------------*/
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void proto_reg_handoff_isdn_sup(void) {
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int i;
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#if 0
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dissector_handle_t q931_handle;
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#endif
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dissector_handle_t isdn_sup_arg_handle;
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dissector_handle_t isdn_sup_res_handle;
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dissector_handle_t isdn_sup_err_handle;
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#if 0
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q931_handle = find_dissector("q931");
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#endif
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isdn_sup_arg_handle = new_create_dissector_handle(dissect_isdn_sup_arg, proto_isdn_sup);
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isdn_sup_res_handle = new_create_dissector_handle(dissect_isdn_sup_res, proto_isdn_sup);
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for (i=0; i<(int)array_length(isdn_sup_op_tab); i++) {
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dissector_add_uint("q932.ros.etsi.local.arg", isdn_sup_op_tab[i].opcode, isdn_sup_arg_handle);
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dissector_add_uint("q932.ros.etsi.local.res", isdn_sup_op_tab[i].opcode, isdn_sup_res_handle);
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}
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for (i=0; i<(int)array_length(isdn_sup_global_op_tab); i++) {
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if(isdn_sup_global_op_tab->arg_pdu)
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dissector_add_string("q932.ros.global.arg", isdn_sup_global_op_tab[i].oid, new_create_dissector_handle(isdn_sup_global_op_tab[i].arg_pdu, proto_isdn_sup));
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if(isdn_sup_global_op_tab->res_pdu)
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dissector_add_string("q932.ros.global.res", isdn_sup_global_op_tab[i].oid, new_create_dissector_handle(isdn_sup_global_op_tab[i].res_pdu, proto_isdn_sup));
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}
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isdn_sup_err_handle = new_create_dissector_handle(dissect_isdn_sup_err, proto_isdn_sup);
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for (i=0; i<(int)array_length(isdn_sup_err_tab); i++) {
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dissector_add_uint("q932.ros.etsi.local.err", isdn_sup_err_tab[i].errcode, isdn_sup_err_handle);
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}
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}
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void proto_register_isdn_sup(void) {
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/* List of fields */
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static hf_register_info hf[] = {
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{ &hf_isdn_sup,
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{ "isdn_sup", "isdn_sup.1",
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FT_INT32, BASE_DEC, NULL, 0,
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NULL, HFILL }
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},
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{ &hf_isdn_sup_operation,
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{ "Operation", "isdn_sup.operation",
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FT_UINT8, BASE_DEC, VALS(isdn_sup_str_operation), 0x0,
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NULL, HFILL }
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},
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{ &hf_isdn_sup_error,
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{ "Error", "isdn_sup.error",
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FT_UINT8, BASE_DEC, VALS(isdn_sup_str_error), 0x0,
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NULL, HFILL }
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},
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#include "packet-isdn-sup-hfarr.c"
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};
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/* List of subtrees */
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static gint *ett[] = {
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&ett_isdn_sup,
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#include "packet-isdn-sup-ettarr.c"
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};
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/* Register fields and subtrees */
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proto_register_field_array(proto_isdn_sup, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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/* Register protocol */
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proto_isdn_sup = proto_register_protocol(PNAME, PSNAME, PFNAME);
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}
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