forked from osmocom/wireshark
![Gerald Combs](/assets/img/avatar_default.png)
Add col_data_changed, which checks to see if we have updated column info. Add col_append_frame_number, which adds a frame number and sets col_data_changed. Call col_append_frame_number instead of col_append_fstr from some dissectors. Add PacketListRecord::invalidateAllRecords, which invalidates any cached record data. Add PacketListModel::invalidateAllColumnStrings which calls invalidateAllRecords and signals that our data has changed. Call invalidateAllColumnStrings when we have new name resolution or column information. Bug: 11414 Bug: 11468 Change-Id: I2671594a722f4f9436fe1df84d43489a148e0cee Reviewed-on: https://code.wireshark.org/review/26373 Reviewed-by: Gerald Combs <gerald@wireshark.org> Petri-Dish: Gerald Combs <gerald@wireshark.org> Tested-by: Petri Dish Buildbot Reviewed-by: Roland Knall <rknall@gmail.com>
591 lines
21 KiB
C
591 lines
21 KiB
C
/* packet-iso15765.c
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* Routines for iso15765 protocol packet disassembly
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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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* 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/prefs.h>
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#include <epan/decode_as.h>
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#include <epan/reassemble.h>
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#include <epan/expert.h>
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#include <epan/proto_data.h>
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#include <wsutil/bits_ctz.h>
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#include "packet-socketcan.h"
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void proto_register_iso15765(void);
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void proto_reg_handoff_iso15765(void);
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#define ISO15765_PCI_OFFSET 0
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#define ISO15765_PCI_LEN 1
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#define ISO15765_MESSAGE_TYPE_MASK 0xF0
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#define ISO15765_MESSAGE_TYPES_SINGLE_FRAME 0
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#define ISO15765_MESSAGE_TYPES_FIRST_FRAME 1
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#define ISO15765_MESSAGE_TYPES_CONSECUTIVE_FRAME 2
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#define ISO15765_MESSAGE_TYPES_FLOW_CONTROL 3
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#define ISO15765_MESSAGE_DATA_LENGTH_MASK 0x0F
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#define ISO15765_MESSAGE_EXTENDED_FRAME_LENGTH_MASK 0x0F
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#define ISO15765_MESSAGE_FRAME_LENGTH_OFFSET (ISO15765_PCI_OFFSET + ISO15765_PCI_LEN)
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#define ISO15765_MESSAGE_FRAME_LENGTH_LEN 1
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#define ISO15765_MESSAGE_SEQUENCE_NUMBER_MASK 0x0F
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#define ISO15765_MESSAGE_FLOW_STATUS_MASK 0x0F
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#define ISO15765_FC_BS_OFFSET (ISO15765_PCI_OFFSET + ISO15765_PCI_LEN)
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#define ISO15765_FC_BS_LEN 1
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#define ISO15765_FC_STMIN_OFFSET (ISO15765_FC_BS_OFFSET + ISO15765_FC_BS_LEN)
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#define ISO15765_FC_STMIN_LEN 1
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struct iso15765_identifier
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{
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guint32 id;
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guint32 seq;
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guint16 frag_id;
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gboolean last;
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};
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typedef struct iso15765_identifier iso15765_identifier_t;
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struct iso15765_frame
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{
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guint32 seq;
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guint32 offset;
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guint32 len;
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gboolean error;
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gboolean complete;
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guint16 last_frag_id;
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guint8 frag_id_high[16];
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};
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typedef struct iso15765_frame iso15765_frame_t;
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static const value_string iso15765_message_types[] = {
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{ISO15765_MESSAGE_TYPES_SINGLE_FRAME, "Single Frame"},
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{ISO15765_MESSAGE_TYPES_FIRST_FRAME, "First Frame"},
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{ISO15765_MESSAGE_TYPES_CONSECUTIVE_FRAME, "Consecutive Frame"},
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{ISO15765_MESSAGE_TYPES_FLOW_CONTROL, "Flow control"},
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{0, NULL}
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};
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#define NORMAL_ADDRESSING 1
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#define EXTENDED_ADDRESSING 2
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static gint addressing = NORMAL_ADDRESSING;
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static guint window = 8;
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/* Encoding */
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static const enum_val_t enum_addressing[] = {
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{"normal", "Normal addressing", NORMAL_ADDRESSING},
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{"extended", "Extended addressing", EXTENDED_ADDRESSING},
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{NULL, NULL, 0}
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};
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static int hf_iso15765_message_type = -1;
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static int hf_iso15765_data_length = -1;
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static int hf_iso15765_frame_length = -1;
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static int hf_iso15765_sequence_number = -1;
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static int hf_iso15765_flow_status = -1;
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static int hf_iso15765_fc_bs = -1;
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static int hf_iso15765_fc_stmin = -1;
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static gint ett_iso15765 = -1;
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static expert_field ei_iso15765_message_type_bad = EI_INIT;
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static int proto_iso15765 = -1;
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static dissector_table_t subdissector_table;
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static reassembly_table iso15765_reassembly_table;
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static wmem_map_t *iso15765_frame_table = NULL;
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static int hf_iso15765_fragments = -1;
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static int hf_iso15765_fragment = -1;
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static int hf_iso15765_fragment_overlap = -1;
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static int hf_iso15765_fragment_overlap_conflicts = -1;
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static int hf_iso15765_fragment_multiple_tails = -1;
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static int hf_iso15765_fragment_too_long_fragment = -1;
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static int hf_iso15765_fragment_error = -1;
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static int hf_iso15765_fragment_count = -1;
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static int hf_iso15765_reassembled_in = -1;
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static int hf_iso15765_reassembled_length = -1;
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static gint ett_iso15765_fragment = -1;
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static gint ett_iso15765_fragments = -1;
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static const fragment_items iso15765_frag_items = {
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/* Fragment subtrees */
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&ett_iso15765_fragment,
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&ett_iso15765_fragments,
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/* Fragment fields */
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&hf_iso15765_fragments,
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&hf_iso15765_fragment,
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&hf_iso15765_fragment_overlap,
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&hf_iso15765_fragment_overlap_conflicts,
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&hf_iso15765_fragment_multiple_tails,
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&hf_iso15765_fragment_too_long_fragment,
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&hf_iso15765_fragment_error,
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&hf_iso15765_fragment_count,
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/* Reassembled in field */
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&hf_iso15765_reassembled_in,
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/* Reassembled length field */
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&hf_iso15765_reassembled_length,
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/* Reassembled data field */
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NULL,
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"ISO15765 fragments"
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};
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static guint8
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masked_guint8_value(const guint8 value, const guint8 mask)
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{
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return (value & mask) >> ws_ctz(mask);
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}
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static int
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dissect_iso15765(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
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{
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static guint32 msg_seqid = 0;
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proto_tree *iso15765_tree;
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proto_item *ti;
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proto_item *message_type_item;
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tvbuff_t* next_tvb = NULL;
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guint8 pci, message_type;
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can_identifier_t* can_info;
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iso15765_identifier_t* iso15765_info;
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guint8 ae = (addressing == NORMAL_ADDRESSING)?0:1;
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guint8 frag_id_low = 0;
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guint32 offset;
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gint32 data_length;
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gboolean fragmented = FALSE;
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gboolean complete = FALSE;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "ISO15765");
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col_clear(pinfo->cinfo,COL_INFO);
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DISSECTOR_ASSERT(data);
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can_info = ((can_identifier_t*)data);
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iso15765_info = (iso15765_identifier_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_iso15765, 0);
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if (!iso15765_info) {
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iso15765_info = wmem_new0(wmem_file_scope(), iso15765_identifier_t);
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iso15765_info->id = can_info->id;
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iso15765_info->last = FALSE;
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p_add_proto_data(wmem_file_scope(), pinfo, proto_iso15765, 0, iso15765_info);
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}
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ti = proto_tree_add_item(tree, proto_iso15765, tvb, 0, -1, ENC_NA);
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iso15765_tree = proto_item_add_subtree(ti, ett_iso15765);
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message_type_item = proto_tree_add_item(iso15765_tree, hf_iso15765_message_type, tvb,
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ae + ISO15765_PCI_OFFSET, ISO15765_PCI_LEN, ENC_BIG_ENDIAN);
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pci = tvb_get_guint8(tvb, ae + ISO15765_PCI_OFFSET);
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message_type = masked_guint8_value(pci, ISO15765_MESSAGE_TYPE_MASK);
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(message_type, iso15765_message_types, "Unknown (0x%02x)"));
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switch(message_type) {
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case ISO15765_MESSAGE_TYPES_SINGLE_FRAME: {
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offset = ae + ISO15765_PCI_OFFSET + ISO15765_PCI_LEN;
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data_length = masked_guint8_value(pci, ISO15765_MESSAGE_DATA_LENGTH_MASK);
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next_tvb = tvb_new_subset_length_caplen(tvb, offset, data_length, data_length);
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complete = TRUE;
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/* Show some info */
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proto_tree_add_item(iso15765_tree, hf_iso15765_data_length, tvb,
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ae + ISO15765_PCI_OFFSET, ISO15765_PCI_LEN, ENC_BIG_ENDIAN);
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col_append_fstr(pinfo->cinfo, COL_INFO, "(Len: %d)", data_length);
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break;
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}
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case ISO15765_MESSAGE_TYPES_FIRST_FRAME: {
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guint32 full_len = tvb_get_ntohs(tvb, ae + ISO15765_PCI_OFFSET) & 0xFFF;
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offset = ae + ISO15765_MESSAGE_FRAME_LENGTH_OFFSET + ISO15765_MESSAGE_FRAME_LENGTH_LEN;
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data_length = tvb_reported_length(tvb) - offset;
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frag_id_low = 0;
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fragmented = TRUE;
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/* Save information */
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if (!(pinfo->fd->flags.visited)) {
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iso15765_frame_t *iso15765_frame = wmem_new0(wmem_file_scope(), iso15765_frame_t);
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iso15765_frame->seq = iso15765_info->seq = ++msg_seqid;
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iso15765_frame->len = full_len;
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wmem_map_insert(iso15765_frame_table, GUINT_TO_POINTER(iso15765_info->seq), iso15765_frame);
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}
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/* Show some info */
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proto_tree_add_item(iso15765_tree, hf_iso15765_frame_length, tvb,
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ae + ISO15765_PCI_OFFSET, 2, ENC_BIG_ENDIAN);
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col_append_fstr(pinfo->cinfo, COL_INFO, "(Frame Len: %d)", full_len);
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break;
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}
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case ISO15765_MESSAGE_TYPES_CONSECUTIVE_FRAME: {
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offset = ae + ISO15765_PCI_OFFSET + ISO15765_PCI_LEN;
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data_length = tvb_reported_length(tvb) - offset;
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frag_id_low = masked_guint8_value(pci, ISO15765_MESSAGE_SEQUENCE_NUMBER_MASK);
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fragmented = TRUE;
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/* Save information */
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if (!(pinfo->fd->flags.visited)) {
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iso15765_info->seq = msg_seqid;
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}
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/* Show some info */
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proto_tree_add_item(iso15765_tree, hf_iso15765_sequence_number,
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tvb, ae + ISO15765_PCI_OFFSET, ISO15765_PCI_LEN, ENC_BIG_ENDIAN);
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col_append_fstr(pinfo->cinfo, COL_INFO, "(Seq: %d)", (pci & ISO15765_MESSAGE_DATA_LENGTH_MASK));
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break;
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}
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case ISO15765_MESSAGE_TYPES_FLOW_CONTROL: {
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guint8 status = masked_guint8_value(pci, ISO15765_MESSAGE_DATA_LENGTH_MASK);
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guint8 bs = tvb_get_guint8(tvb, ae + ISO15765_FC_BS_OFFSET);
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guint8 stmin = tvb_get_guint8(tvb, ae + ISO15765_FC_STMIN_OFFSET);
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data_length = 0;
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proto_tree_add_item(iso15765_tree, hf_iso15765_flow_status, tvb,
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ae + ISO15765_PCI_OFFSET, ISO15765_PCI_LEN, ENC_BIG_ENDIAN);
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proto_tree_add_item(iso15765_tree, hf_iso15765_fc_bs, tvb,
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ae + ISO15765_FC_BS_OFFSET, ISO15765_FC_BS_LEN, ENC_BIG_ENDIAN);
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proto_tree_add_item(iso15765_tree, hf_iso15765_fc_stmin, tvb,
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ae + ISO15765_FC_STMIN_OFFSET, ISO15765_FC_STMIN_LEN, ENC_BIG_ENDIAN);
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col_append_fstr(pinfo->cinfo, COL_INFO, "(Status: %d, Block size:0x%x, Seperation time minimum: %d ms)",
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status, bs, stmin);
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break;
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}
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default:
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expert_add_info_format(pinfo, message_type_item, &ei_iso15765_message_type_bad,
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"Bad Message Type value %u <= 3", message_type);
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return ae + ISO15765_PCI_OFFSET;
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}
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/* Show data */
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if (data_length > 0) {
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col_append_fstr(pinfo->cinfo, COL_INFO, " %s",
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tvb_bytes_to_str_punct(wmem_packet_scope(), tvb, offset, data_length, ' '));
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}
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if (fragmented) {
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tvbuff_t *new_tvb = NULL;
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iso15765_frame_t *iso15765_frame;
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guint16 frag_id = frag_id_low;
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/* Get frame information */
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iso15765_frame = (iso15765_frame_t *)wmem_map_lookup(iso15765_frame_table,
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GUINT_TO_POINTER(iso15765_info->seq));
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if (iso15765_frame != NULL)
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{
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if (!(pinfo->fd->flags.visited)) {
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frag_id += ((iso15765_frame->frag_id_high[frag_id]++) * 16);
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/* Save the frag_id for subsequent dissection */
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iso15765_info->frag_id = frag_id;
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/* Check if there is an error in conversation */
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if (iso15765_info->frag_id + window < iso15765_frame->last_frag_id) {
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/* Error in conversation */
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iso15765_frame->error = TRUE;
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}
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}
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if (!iso15765_frame->error) {
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gboolean save_fragmented = pinfo->fragmented;
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guint32 len = data_length;
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fragment_head *frag_msg;
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/* Check if it's the last packet */
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if (!(pinfo->fd->flags.visited)) {
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/* Update the last_frag_id */
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if (frag_id > iso15765_frame->last_frag_id) {
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iso15765_frame->last_frag_id = frag_id;
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}
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iso15765_frame->offset += len;
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if (iso15765_frame->offset >= iso15765_frame->len) {
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iso15765_info->last = TRUE;
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iso15765_frame->complete = TRUE;
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len -= (iso15765_frame->offset - iso15765_frame->len);
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}
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}
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pinfo->fragmented = TRUE;
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/* Add fragment to fragment table */
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frag_msg = fragment_add_seq_check(&iso15765_reassembly_table, tvb, offset, pinfo, iso15765_info->seq, NULL,
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iso15765_info->frag_id, len, !iso15765_info->last);
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new_tvb = process_reassembled_data(tvb, offset, pinfo, "Reassembled Message", frag_msg,
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&iso15765_frag_items, NULL, iso15765_tree);
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if (frag_msg && frag_msg->reassembled_in != pinfo->num) {
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col_append_frame_number(pinfo, COL_INFO, " [Reassembled in #%u]",
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frag_msg->reassembled_in);
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}
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pinfo->fragmented = save_fragmented;
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}
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if (new_tvb) {
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/* This is a complete TVB to dissect */
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next_tvb = new_tvb;
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complete = TRUE;
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} else {
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next_tvb = tvb_new_subset_length_caplen(tvb, offset, data_length, data_length);
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}
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}
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}
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if (next_tvb) {
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if (!complete || !dissector_try_payload_new(subdissector_table, next_tvb, pinfo, tree, TRUE, NULL)) {
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call_data_dissector(next_tvb, pinfo, tree);
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}
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}
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return tvb_captured_length(tvb);
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}
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void
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proto_register_iso15765(void)
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{
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static hf_register_info hf[] = {
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{
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&hf_iso15765_message_type,
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{
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"Message Type", "iso15765.message_type",
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FT_UINT8, BASE_HEX,
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VALS(iso15765_message_types), ISO15765_MESSAGE_TYPE_MASK,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_data_length,
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{
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"Data length", "iso15765.data_length",
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FT_UINT8, BASE_DEC,
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NULL, ISO15765_MESSAGE_DATA_LENGTH_MASK,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_frame_length,
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{
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"Frame length", "iso15765.frame_length",
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FT_UINT16, BASE_DEC,
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NULL, 0x0fff,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_sequence_number,
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{
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"Sequence number", "iso15765.sequence_number",
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FT_UINT8, BASE_HEX,
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NULL, ISO15765_MESSAGE_SEQUENCE_NUMBER_MASK,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_flow_status,
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{
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"Flow status", "iso15765.flow_status",
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FT_UINT8, BASE_HEX,
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NULL, ISO15765_MESSAGE_FLOW_STATUS_MASK,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_fc_bs,
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{
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"Block size", "iso15765.flow_control.bs",
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FT_UINT8, BASE_HEX,
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NULL, 0x00,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_fc_stmin,
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{
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"Separation time minimum (ms)", "iso15765.flow_control.stmin",
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FT_UINT8, BASE_DEC,
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NULL, 0x00,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_fragments,
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{
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"Message fragments", "iso15765.fragments",
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FT_NONE, BASE_NONE,
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NULL, 0x00,
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NULL, HFILL
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},
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},
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{
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&hf_iso15765_fragment,
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{
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"Message fragment", "iso15765.fragment",
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FT_FRAMENUM, BASE_NONE,
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NULL, 0x00,
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NULL, HFILL
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}
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},
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{
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&hf_iso15765_fragment_overlap,
|
|
{
|
|
"Message fragment overlap", "iso15765.fragment.overlap",
|
|
FT_BOOLEAN, 0,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_fragment_overlap_conflicts,
|
|
{
|
|
"Message fragment overlapping with conflicting data", "iso15765.fragment.overlap.conflicts",
|
|
FT_BOOLEAN, 0,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_fragment_multiple_tails,
|
|
{
|
|
"Message has multiple tail fragments", "iso15765.fragment.multiple_tails",
|
|
FT_BOOLEAN, 0,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_fragment_too_long_fragment,
|
|
{
|
|
"Message fragment too long", "iso15765.fragment.too_long_fragment",
|
|
FT_BOOLEAN, 0, NULL,
|
|
0x00, NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_fragment_error,
|
|
{
|
|
"Message defragmentation error", "iso15765.fragment.error",
|
|
FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_fragment_count,
|
|
{
|
|
"Message fragment count", "iso15765.fragment.count",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_reassembled_in,
|
|
{
|
|
"Reassembled in", "iso15765.reassembled.in",
|
|
FT_FRAMENUM, BASE_NONE,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_iso15765_reassembled_length,
|
|
{
|
|
"Reassembled length", "iso15765.reassembled.length",
|
|
FT_UINT32, BASE_DEC,
|
|
NULL, 0x00,
|
|
NULL, HFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] =
|
|
{
|
|
&ett_iso15765,
|
|
&ett_iso15765_fragment,
|
|
&ett_iso15765_fragments,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{
|
|
&ei_iso15765_message_type_bad,
|
|
{
|
|
"iso15765.message_type.bad", PI_MALFORMED,
|
|
PI_ERROR, "Bad Message Type value", EXPFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
module_t *iso15765_module;
|
|
expert_module_t* expert_iso15765;
|
|
|
|
proto_iso15765 = proto_register_protocol (
|
|
"ISO15765 Protocol", /* name */
|
|
"ISO 15765", /* short name */
|
|
"iso15765" /* abbrev */
|
|
);
|
|
register_dissector("iso15765", dissect_iso15765, proto_iso15765);
|
|
expert_iso15765 = expert_register_protocol(proto_iso15765);
|
|
|
|
proto_register_field_array(proto_iso15765, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
expert_register_field_array(expert_iso15765, ei, array_length(ei));
|
|
|
|
iso15765_module = prefs_register_protocol(proto_iso15765, NULL);
|
|
|
|
prefs_register_enum_preference(iso15765_module, "addressing",
|
|
"Addressing",
|
|
"Addressing of ISO 15765. Normal or Extended",
|
|
&addressing,
|
|
enum_addressing, TRUE);
|
|
|
|
prefs_register_uint_preference(iso15765_module, "window",
|
|
"Window",
|
|
"Window of ISO 15765 fragments",
|
|
10, &window);
|
|
|
|
iso15765_frame_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), g_direct_hash, g_direct_equal);
|
|
|
|
reassembly_table_register(&iso15765_reassembly_table,
|
|
&addresses_reassembly_table_functions);
|
|
|
|
subdissector_table = register_decode_as_next_proto(proto_iso15765, "Transport", "iso15765.subdissector", "ISO15765 next level dissector", NULL);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_iso15765(void)
|
|
{
|
|
static dissector_handle_t iso15765_handle;
|
|
|
|
iso15765_handle = create_dissector_handle(dissect_iso15765, proto_iso15765);
|
|
dissector_add_for_decode_as("can.subdissector", iso15765_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|