deb95a275d
And change them to say "set" rather than "create"; they do more than just allocate an array of conversation elements, they stuff a pointer to that array into pinfo, which may affect what other dissectors do.
523 lines
14 KiB
C
523 lines
14 KiB
C
/* packet-k12.c
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* Helper-dissector for Tektronix k12xx-k15xx .rf5 file type
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*
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* Luis E. Garcia Ontanon <luis@ontanon.org>
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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
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/conversation.h>
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#include <epan/prefs.h>
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#include <epan/uat.h>
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#include <epan/expert.h>
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#include <epan/strutil.h>
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#include <epan/proto_data.h>
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#include <wiretap/wtap.h>
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#include <wsutil/pint.h>
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#include <wsutil/str_util.h>
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#include "packet-sscop.h"
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#include "packet-umts_fp.h"
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void proto_reg_handoff_k12(void);
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void proto_register_k12(void);
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typedef struct _k12_hdls_t {
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char* match;
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char* protos;
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dissector_handle_t* handles;
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} k12_handles_t;
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static int proto_k12 = -1;
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static int hf_k12_port_id = -1;
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static int hf_k12_port_name = -1;
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static int hf_k12_stack_file = -1;
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static int hf_k12_port_type = -1;
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static int hf_k12_atm_vp = -1;
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static int hf_k12_atm_vc = -1;
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static int hf_k12_atm_cid = -1;
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static int hf_k12_ts = -1;
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static gint ett_k12 = -1;
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static gint ett_port = -1;
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static expert_field ei_k12_unmatched_stk_file = EI_INIT;
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static expert_field ei_k12_unmatched_info = EI_INIT;
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static dissector_handle_t k12_handle;
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static dissector_handle_t data_handle;
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static dissector_handle_t sscop_handle;
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static dissector_handle_t fp_handle;
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extern int proto_sscop;
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extern int proto_fp;
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static wmem_tree_t* port_handles = NULL;
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static uat_t* k12_uat = NULL;
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static k12_handles_t* k12_handles = NULL;
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static guint nk12_handles = 0;
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static const value_string k12_port_types[] = {
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{ K12_PORT_DS1, "Ds1" },
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{ K12_PORT_DS0S, "Ds0 Range" },
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{ K12_PORT_ATMPVC, "ATM PVC" },
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{ 0, NULL }
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};
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static void
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fill_fp_info(fp_info* p_fp_info, guchar* extra_info, guint32 length)
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{
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guint adj = 0;
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/* 0x11=control frame 0x30=data frame */
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guint info_type = pntoh16(extra_info);
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/* 1=FDD, 2=TDD 3.84, 3=TDD 1.28 */
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guchar radio_mode = extra_info[14];
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guchar channel_type = 0;
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guint i;
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if (!p_fp_info || length < 22)
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return;
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/* Store division type */
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p_fp_info->division = (enum division_type)radio_mode;
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/* Format used by K15, later fields are shifted by 8 bytes. */
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if (pntoh16(extra_info+2) == 5)
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adj = 8;
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p_fp_info->iface_type = IuB_Interface;
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p_fp_info->release = 0; /* dummy */
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p_fp_info->release_year = 0; /* dummy */
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p_fp_info->release_month = 0; /* dummy */
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/* 1=UL, 2=DL */
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if (extra_info[15] == 1)
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p_fp_info->is_uplink = 1;
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else
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p_fp_info->is_uplink = 0;
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if (info_type == 0x11) /* control frame */
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channel_type = extra_info[21 + adj];
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else if (info_type == 0x30) /* data frame */
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channel_type = extra_info[22 + adj];
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switch (channel_type) {
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case 1:
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p_fp_info->channel = CHANNEL_BCH;
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break;
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case 2:
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p_fp_info->channel = CHANNEL_PCH;
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p_fp_info->paging_indications = 0; /* dummy */
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break;
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case 3:
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p_fp_info->channel = CHANNEL_CPCH;
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break;
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case 4:
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if (radio_mode == 1)
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p_fp_info->channel = CHANNEL_RACH_FDD;
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else if (radio_mode == 2)
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p_fp_info->channel = CHANNEL_RACH_TDD;
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else
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p_fp_info->channel = CHANNEL_RACH_TDD_128;
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break;
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case 5:
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if (radio_mode == 1)
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p_fp_info->channel = CHANNEL_FACH_FDD;
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else
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p_fp_info->channel = CHANNEL_FACH_TDD;
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break;
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case 6:
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if (radio_mode == 2)
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p_fp_info->channel = CHANNEL_USCH_TDD_384;
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else
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p_fp_info->channel = CHANNEL_USCH_TDD_128;
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break;
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case 7:
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if (radio_mode == 1)
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p_fp_info->channel = CHANNEL_DSCH_FDD;
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else
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p_fp_info->channel = CHANNEL_DSCH_TDD;
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break;
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case 8:
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p_fp_info->channel = CHANNEL_DCH;
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break;
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}
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p_fp_info->dch_crc_present = 2; /* information not available */
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if (info_type == 0x30) { /* data frame */
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p_fp_info->num_chans = extra_info[23 + adj];
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/* For each channel */
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for (i = 0; i < (guint)p_fp_info->num_chans && (36+i*104+adj) <= length; ++i) {
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/* Read TB size */
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p_fp_info->chan_tf_size[i] = pntoh32(extra_info+28+i*104+adj);
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if (p_fp_info->chan_tf_size[i])
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/* Work out number of TBs on this channel */
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p_fp_info->chan_num_tbs[i] = pntoh32(extra_info+32+i*104+adj)
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/ p_fp_info->chan_tf_size[i];
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}
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}
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}
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static int
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dissect_k12(tvbuff_t* tvb,packet_info* pinfo,proto_tree* tree, void* data _U_)
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{
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static dissector_handle_t data_handles[2] = {NULL, NULL};
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proto_item* k12_item;
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proto_tree* k12_tree;
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proto_item* stack_item;
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dissector_handle_t sub_handle = NULL;
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dissector_handle_t* handles;
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guint i;
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k12_item = proto_tree_add_protocol_format(tree, proto_k12, tvb, 0, 0,
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"Packet from: '%s' (0x%.8x)",
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pinfo->pseudo_header->k12.input_name,
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pinfo->pseudo_header->k12.input);
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k12_tree = proto_item_add_subtree(k12_item, ett_k12);
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proto_tree_add_uint(k12_tree, hf_k12_port_id, tvb, 0,0,pinfo->pseudo_header->k12.input);
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proto_tree_add_string(k12_tree, hf_k12_port_name, tvb, 0,0,pinfo->pseudo_header->k12.input_name);
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stack_item = proto_tree_add_string(k12_tree, hf_k12_stack_file, tvb, 0,0,pinfo->pseudo_header->k12.stack_file);
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k12_item = proto_tree_add_uint(k12_tree, hf_k12_port_type, tvb, 0, 0,
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pinfo->pseudo_header->k12.input_type);
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k12_tree = proto_item_add_subtree(k12_item, ett_port);
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switch ( pinfo->pseudo_header->k12.input_type ) {
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case K12_PORT_DS0S:
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proto_tree_add_uint(k12_tree, hf_k12_ts, tvb, 0,0,pinfo->pseudo_header->k12.input_info.ds0mask);
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break;
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case K12_PORT_ATMPVC:
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{
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gchar* circuit_str = wmem_strdup_printf(pinfo->pool, "%u:%u:%u",
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(guint)pinfo->pseudo_header->k12.input_info.atm.vp,
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(guint)pinfo->pseudo_header->k12.input_info.atm.vc,
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(guint)pinfo->pseudo_header->k12.input_info.atm.cid);
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/*
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* XXX: this is prone to collisions!
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* we need an uniform way to manage circuits between dissectors
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*/
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conversation_set_elements_by_id(pinfo, CONVERSATION_NONE, g_str_hash(circuit_str));
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proto_tree_add_uint(k12_tree, hf_k12_atm_vp, tvb, 0, 0,
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pinfo->pseudo_header->k12.input_info.atm.vp);
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proto_tree_add_uint(k12_tree, hf_k12_atm_vc, tvb, 0, 0,
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pinfo->pseudo_header->k12.input_info.atm.vc);
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if (pinfo->pseudo_header->k12.input_info.atm.cid)
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proto_tree_add_uint(k12_tree, hf_k12_atm_cid, tvb, 0, 0,
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pinfo->pseudo_header->k12.input_info.atm.cid);
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break;
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}
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default:
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break;
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}
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handles = (dissector_handle_t *)wmem_tree_lookup32(port_handles, pinfo->pseudo_header->k12.input);
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if (! handles ) {
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for (i=0 ; i < nk12_handles; i++) {
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if ( ws_strcasestr(pinfo->pseudo_header->k12.stack_file, k12_handles[i].match)
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|| ws_strcasestr(pinfo->pseudo_header->k12.input_name, k12_handles[i].match) ) {
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handles = k12_handles[i].handles;
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break;
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}
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}
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if (!handles) {
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data_handles[0] = data_handle;
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handles = data_handles;
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}
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wmem_tree_insert32(port_handles, pinfo->pseudo_header->k12.input, handles);
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}
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if (handles == data_handles) {
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expert_add_info(pinfo, stack_item, &ei_k12_unmatched_stk_file);
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expert_add_info(pinfo, stack_item, &ei_k12_unmatched_info);
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call_dissector(data_handle, tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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/* Setup subdissector information */
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for (i = 0; handles[i] && handles[i+1]; ++i) {
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if (handles[i] == sscop_handle) {
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sscop_payload_info* p_sscop_info = (sscop_payload_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0);
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if (!p_sscop_info) {
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p_sscop_info = wmem_new0(wmem_file_scope(), sscop_payload_info);
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p_add_proto_data(wmem_file_scope(), pinfo, proto_sscop, 0, p_sscop_info);
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p_sscop_info->subdissector = handles[i+1];
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}
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}
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/* Add more protocols here */
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}
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sub_handle = handles[0];
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/* Setup information required by certain protocols */
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if (sub_handle == fp_handle) {
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fp_info* p_fp_info = (fp_info *)p_get_proto_data(wmem_file_scope(), pinfo, proto_fp, 0);
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if (!p_fp_info) {
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p_fp_info = wmem_new0(wmem_file_scope(), fp_info);
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p_add_proto_data(wmem_file_scope(), pinfo, proto_fp, 0, p_fp_info);
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fill_fp_info(p_fp_info,
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pinfo->pseudo_header->k12.extra_info,
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pinfo->pseudo_header->k12.extra_length);
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}
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}
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call_dissector(sub_handle, tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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static gboolean
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k12_update_cb(void* r, char** err)
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{
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k12_handles_t* h = (k12_handles_t *)r;
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gchar** protos;
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guint num_protos, i;
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protos = g_strsplit(h->protos,":",0);
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for (num_protos = 0; protos[num_protos]; num_protos++)
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g_strstrip(protos[num_protos]);
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g_free(h->handles);
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/* Allocate extra space for NULL marker */
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h->handles = g_new0(dissector_handle_t, (num_protos+1));
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for (i = 0; i < num_protos; i++) {
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if ( ! (h->handles[i] = find_dissector(protos[i])) ) {
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h->handles[i] = data_handle;
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h->handles[i+1] = NULL;
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*err = ws_strdup_printf("Could not find dissector for: '%s'",protos[i]);
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g_strfreev(protos);
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return FALSE;
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}
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}
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h->handles[i] = NULL;
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g_strfreev(protos);
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*err = NULL;
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return TRUE;
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}
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static void*
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k12_copy_cb(void* dest, const void* orig, size_t len _U_)
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{
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k12_handles_t* d = (k12_handles_t *)dest;
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const k12_handles_t* o = (const k12_handles_t *)orig;
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gchar** protos = g_strsplit(d->protos,":",0);
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guint num_protos;
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for (num_protos = 0; protos[num_protos]; num_protos++)
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g_strstrip(protos[num_protos]);
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d->match = g_strdup(o->match);
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d->protos = g_strdup(o->protos);
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d->handles = (dissector_handle_t *)g_memdup2(o->handles,(guint)(sizeof(dissector_handle_t)*(num_protos+1)));
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g_strfreev(protos);
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return dest;
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}
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static void
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k12_free_cb(void* r)
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{
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k12_handles_t* h = (k12_handles_t *)r;
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g_free(h->match);
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g_free(h->protos);
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g_free(h->handles);
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}
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static gboolean
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protos_chk_cb(void* r _U_, const char* p, guint len, const void* u1 _U_, const void* u2 _U_, char** err)
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{
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gchar** protos;
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gchar* line = wmem_strndup(NULL,p,len);
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guint num_protos, i;
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g_strstrip(line);
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ascii_strdown_inplace(line);
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protos = g_strsplit(line,":",0);
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for (num_protos = 0; protos[num_protos]; num_protos++)
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g_strstrip(protos[num_protos]);
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if (!num_protos) {
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*err = g_strdup("No protocols given");
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wmem_free(NULL, line);
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g_strfreev(protos);
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return FALSE;
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}
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for (i = 0; i < num_protos; i++) {
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if (!find_dissector(protos[i])) {
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*err = ws_strdup_printf("Could not find dissector for: '%s'",protos[i]);
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wmem_free(NULL, line);
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g_strfreev(protos);
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return FALSE;
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}
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}
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wmem_free(NULL, line);
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g_strfreev(protos);
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return TRUE;
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}
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UAT_CSTRING_CB_DEF(k12,match,k12_handles_t)
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UAT_CSTRING_CB_DEF(k12,protos,k12_handles_t)
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void
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proto_register_k12(void)
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{
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static hf_register_info hf[] = {
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{ &hf_k12_port_id,
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{ "Port Id", "k12.port_id",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_port_name,
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{ "Port Name", "k12.port_name",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_stack_file,
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{ "Stack file used", "k12.stack_file",
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FT_STRING, BASE_NONE, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_port_type,
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{ "Port type", "k12.input_type",
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FT_UINT32, BASE_HEX, VALS(k12_port_types), 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_ts,
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{ "Timeslot mask", "k12.ds0.ts",
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FT_UINT32, BASE_HEX, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_atm_vp,
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{ "ATM VPI", "atm.vpi",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_atm_vc,
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{ "ATM VCI", "atm.vci",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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},
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{ &hf_k12_atm_cid,
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{ "AAL2 CID", "aal2.cid",
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FT_UINT16, BASE_DEC, NULL, 0x0,
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NULL, HFILL }
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}
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};
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static gint* ett[] = {
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&ett_k12,
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&ett_port
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};
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static ei_register_info ei[] = {
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{ &ei_k12_unmatched_stk_file,
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{ "k12.unmatched_stk_file", PI_UNDECODED, PI_WARN,
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"Warning: stk file not matched in the 'K12 Protocols' table", EXPFILL }},
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{ &ei_k12_unmatched_info,
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{ "k12.unmatched_info", PI_PROTOCOL, PI_NOTE,
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"You can edit the 'K12 Protocols' table from Preferences->Protocols->k12xx", EXPFILL }},
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};
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static uat_field_t uat_k12_flds[] = {
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UAT_FLD_CSTRING_ISPRINT(k12,match,"Match string",
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"A string that will be matched (a=A) against an .stk filename or the name of a port.\n"
|
|
"The first match wins, the order of entries in the table is important!."),
|
|
UAT_FLD_CSTRING_OTHER(k12,protos,"Protocol",protos_chk_cb,
|
|
"The lowest layer protocol described by this .stk file (eg: mtp2).\n"
|
|
"Use (sscop:sscf-nni) for sscf-nni (MTP3b) with sscop"),
|
|
UAT_END_FIELDS
|
|
};
|
|
|
|
module_t* k12_module;
|
|
expert_module_t* expert_k12;
|
|
|
|
proto_k12 = proto_register_protocol("K12xx", "K12xx", "k12");
|
|
proto_register_field_array(proto_k12, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_k12 = expert_register_protocol(proto_k12);
|
|
expert_register_field_array(expert_k12, ei, array_length(ei));
|
|
k12_handle = register_dissector("k12", dissect_k12, proto_k12);
|
|
|
|
k12_uat = uat_new("K12 Protocols",
|
|
sizeof(k12_handles_t),
|
|
"k12_protos", /* filename */
|
|
TRUE, /* from_profile */
|
|
&k12_handles, /* data_ptr */
|
|
&nk12_handles, /* numitems_ptr */
|
|
UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
|
|
"ChK12ProtocolsSection", /* help */
|
|
k12_copy_cb,
|
|
k12_update_cb,
|
|
k12_free_cb,
|
|
NULL,
|
|
NULL,
|
|
uat_k12_flds);
|
|
|
|
k12_module = prefs_register_protocol(proto_k12, NULL);
|
|
|
|
prefs_register_obsolete_preference(k12_module, "config");
|
|
|
|
prefs_register_uat_preference(k12_module, "cfg",
|
|
"K12 Protocols",
|
|
"A table of matches vs stack filenames and relative protocols",
|
|
k12_uat);
|
|
|
|
port_handles = wmem_tree_new_autoreset(wmem_epan_scope(), wmem_file_scope());
|
|
|
|
}
|
|
|
|
void proto_reg_handoff_k12(void)
|
|
{
|
|
data_handle = find_dissector("data");
|
|
sscop_handle = find_dissector("sscop");
|
|
fp_handle = find_dissector("fp");
|
|
|
|
dissector_add_uint("wtap_encap", WTAP_ENCAP_K12, k12_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|