diff options
Diffstat (limited to 'plugins/epan/docsis/packet-docsis.c')
| -rw-r--r-- | plugins/epan/docsis/packet-docsis.c | 1177 |
1 files changed, 0 insertions, 1177 deletions
diff --git a/plugins/epan/docsis/packet-docsis.c b/plugins/epan/docsis/packet-docsis.c deleted file mode 100644 index 6280ea4728..0000000000 --- a/plugins/epan/docsis/packet-docsis.c +++ /dev/null @@ -1,1177 +0,0 @@ -/* packet-docsis.c - * Routines for docsis dissection - * Copyright 2002, Anand V. Narwani <anand[AT]narwani.org> - * - * Wireshark - Network traffic analyzer - * By Gerald Combs <gerald@wireshark.org> - * Copyright 1998 Gerald Combs - * - * SPDX-License-Identifier: GPL-2.0-or-later - */ - - -/* This code is based on the DOCSIS 1.1 specification available at: - * http://www.cablelabs.com/wp-content/uploads/specdocs/CM-SP-RFIv1.1-C01-050907.pdf - * - * This code was updated to include DOCSIS 3.1 specification details available at: - * http://www.cablelabs.com/wp-content/uploads/specdocs/CM-SP-MULPIv3.1-I09-160602.pdf - * - * Updates are backward compatible with previous DOCSIS spcifications. - * - * DOCSIS Captures can be facilitated using the Cable Monitor Feature - * available on Cisco Cable Modem Termination Systems : - * http://www.cisco.com/univercd/cc/td/doc/product/cable/cab_rout/cmtsfg/ufg_cmon.htm - * - * This dissector depends on the presence of a DOCSIS enapsulation type. - * There is no simple way to distinguish DOCSIS Frames from Ethernet frames, - * since the frames are copied from the RF interface on the CMTS to - * a Fast Ethernet interface; thus a preference was needed to enable - * the DOCSIS encapsulation type. - * - * Libpcap 0.7 and later allow a link-layer header type to be specified for - * some interfaces on some platforms; for Ethernet interfaces, they allow - * DOCSIS to be specified. If an Ethernet capture is done with a link-layer - * type of DOCSIS, the file will have a link-layer header type of DLT_DOCSIS; - * Wireshark will treat the frames in that capture as DOCSIS frames. - */ - -#include "config.h" - -#include <epan/etypes.h> -#include <epan/expert.h> -#include <epan/packet.h> -#include <epan/prefs.h> -#include <epan/reassemble.h> -#include <wiretap/wtap.h> -#include <epan/exceptions.h> -#include <epan/crc16-tvb.h> -#include <epan/crc32-tvb.h> - -void proto_register_docsis(void); -void proto_reg_handoff_docsis(void); - -/* Assume all packets have an FCS */ -static gboolean docsis_check_fcs = TRUE; - -#define DOCSIS_MIN_HEADER_LEN 6 - -#define FCTYPE_PACKET 0x00 -#define FCTYPE_RESERVED 0x01 -#define FCTYPE_ISOLAT 0x02 -#define FCTYPE_MACSPC 0x03 - -#define FCPARM_TIMING_HDR 0x00 -#define FCPARM_MAC_MGMT_HDR 0x01 -#define FCPARM_RQST_FRM 0x02 -#define FCPARM_FRAG_HDR 0x03 -#define FCPARM_QUEUE_DEPTH_REQ_FRM 0x04 -#define FCPARM_CONCAT_HDR 0x1C - -#define EXT_HDR_OFF 0x00 -#define EXT_HDR_ON 0x01 - -#define FRAG_FCS_LEN 4 -#define FRAG_FIRST 0x20 -#define FRAG_MIDDLE 0x00 -#define FRAG_LAST 0x10 - -#define EH_NULL_CONFIG 0 -#define EH_REQUEST 1 -#define EH_ACK_REQ 2 -#define EH_BP_UP 3 -#define EH_BP_DOWN 4 -#define EH_SFLOW_HDR_DOWN 5 -#define EH_SFLOW_HDR_UP 6 -#define EH_BP_UP2 7 -#define EH_DS_SERVICE 8 -#define EH_PATH_VERIFY 9 -#define EH_RESERVED_10 10 -#define EH_RESERVED_11 11 -#define EH_RESERVED_12 12 -#define EH_RESERVED_13 13 -#define EH_RESERVED_14 14 -#define EH_EXTENDED 15 - -/* Initialize the protocol and registered fields */ -static int proto_docsis = -1; -static int hf_docsis_fctype = -1; -static int hf_docsis_machdr_fcparm = -1; -static int hf_docsis_fcparm = -1; -static int hf_docsis_exthdr = -1; -static int hf_docsis_concat_cnt = -1; -static int hf_docsis_macparm = -1; -static int hf_docsis_ehdrlen = -1; -static int hf_docsis_len = -1; -static int hf_docsis_eh_type = -1; -static int hf_docsis_eh_len = -1; -static int hf_docsis_eh_val = -1; -static int hf_docsis_frag_rsvd = -1; -static int hf_docsis_frag_first = -1; -static int hf_docsis_frag_last = -1; -static int hf_docsis_frag_seq = -1; -static int hf_docsis_sid = -1; -static int hf_docsis_mini_slots = -1; -static int hf_docsis_requested_size = -1; -static int hf_docsis_hcs = -1; -static int hf_docsis_hcs_status = -1; -static int hf_docsis_bpi_en = -1; -static int hf_docsis_toggle_bit = -1; -static int hf_docsis_key_seq = -1; -static int hf_docsis_ehdr_ver = -1; -static int hf_docsis_said = -1; -static int hf_docsis_ehdr_phsi = -1; -static int hf_docsis_ehdr_qind = -1; -static int hf_docsis_ehdr_grants = -1; -static int hf_docsis_reserved = -1; -static int hf_docsis_ehdr_ds_traffic_pri = -1; -static int hf_docsis_ehdr_ds_seq_chg_cnt = -1; -static int hf_docsis_ehdr_ds_dsid = -1; -static int hf_docsis_ehdr_ds_pkt_seq_num = -1; -static int hf_docsis_ehdr_bpup2_bpi_en = -1; -static int hf_docsis_ehdr_bpup2_toggle_bit = -1; -static int hf_docsis_ehdr_bpup2_key_seq = -1; -static int hf_docsis_ehdr_bpup2_ver = -1; -static int hf_docsis_ehdr_bpup2_sid = -1; -static int hf_docsis_ehdr_pv_st_refpt = -1; -static int hf_docsis_ehdr_pv_timestamp = -1; - -static int hf_docsis_fragments = -1; -static int hf_docsis_fragment = -1; -static int hf_docsis_fragment_overlap = -1; -static int hf_docsis_fragment_overlap_conflict = -1; -static int hf_docsis_fragment_multiple_tails = -1; -static int hf_docsis_fragment_too_long_fragment = -1; -static int hf_docsis_fragment_error = -1; -static int hf_docsis_fragment_count = -1; -static int hf_docsis_reassembled_in = -1; -static int hf_docsis_reassembled_length = -1; -static int hf_docsis_reassembled_data = -1; -static int hf_docsis_frag_fcs = -1; -static int hf_docsis_frag_fcs_status = -1; - -static dissector_handle_t docsis_handle; -static dissector_handle_t eth_withoutfcs_handle; -static dissector_handle_t docsis_mgmt_handle; -#if 0 -static dissector_table_t docsis_dissector_table; -#endif - -static expert_field ei_docsis_hcs_bad = EI_INIT; -static expert_field ei_docsis_len = EI_INIT; -static expert_field ei_docsis_frag_fcs_bad = EI_INIT; -static expert_field ei_docsis_eh_len = EI_INIT; - -/* Initialize the subtree pointers */ -static gint ett_docsis = -1; -static gint ett_ehdr = -1; -static gint ett_docsis_fragments = -1; -static gint ett_docsis_fragment = -1; - -static const value_string fctype_vals[] = { - {FCTYPE_PACKET, "Packet PDU"}, - {FCTYPE_RESERVED, "Reserved"}, - {FCTYPE_ISOLAT, "Isolation PDU"}, - {FCTYPE_MACSPC, "MAC Specific"}, - {0, NULL} -}; - -static const value_string eh_type_vals[] = { - {0, "NULL Configuration Parameter"}, - {EH_REQUEST, "Request"}, - {EH_ACK_REQ, "Acknowledgement Requested"}, - {EH_BP_UP, "Upstream Privacy Element"}, - {EH_BP_DOWN, "Downstream Privacy Element"}, - {EH_SFLOW_HDR_UP, "Service Flow EH; PHS Header Upstream"}, - {EH_SFLOW_HDR_DOWN, "Service Flow EH; PHS Header Downstream"}, - {EH_BP_UP2, "Upstream Privacy with Multi Channel"}, - {EH_DS_SERVICE, "Downstream Service"}, - {EH_PATH_VERIFY, "Path Verify"}, - {EH_RESERVED_10, "Reserved"}, - {EH_RESERVED_11, "Reserved"}, - {EH_RESERVED_12, "Reserved"}, - {EH_RESERVED_13, "Reserved"}, - {EH_RESERVED_14, "Reserved"}, - {EH_EXTENDED, "Extended"}, - {0, NULL} -}; - -static const value_string ms_fcparm_vals[] = { - {FCPARM_TIMING_HDR, "Timing Header"}, - {FCPARM_MAC_MGMT_HDR, "MAC Management Message"}, - {FCPARM_RQST_FRM, "Request Frame"}, - {FCPARM_FRAG_HDR, "Fragmentation Header"}, - {FCPARM_QUEUE_DEPTH_REQ_FRM, "Queue Depth-based Request Frame"}, - {FCPARM_CONCAT_HDR, "Concatenation Header"}, - {0, NULL} -}; - -static const value_string pkt_fcparm_vals[] = { - {0x00, "PDU MAC"}, - {0x01, "DELAY/DUPLICATE/MULTICAST/BROADCAST"}, - {0, NULL} -}; - -static const true_false_string exthdr_tfs = { - "Extended Header Present", - "Extended Header Absent" -}; - -/* Plugins can't use true_false_string and value_string const from /epan on Windows - Duplicated here because of that */ -static const true_false_string ena_dis_tfs = { - "Enabled", - "Disabled" -}; - -static const value_string local_proto_checksum_vals[] = { - { PROTO_CHECKSUM_E_BAD, "Bad" }, - { PROTO_CHECKSUM_E_GOOD, "Good" }, - { PROTO_CHECKSUM_E_UNVERIFIED, "Unverified" }, - { PROTO_CHECKSUM_E_NOT_PRESENT, "Not present" }, - - { 0, NULL } -}; - -static const true_false_string qind_tfs = { - "Rate overrun", - "Rate non-overrun" -}; - -static const true_false_string odd_even_tfs = { - "Odd Key", - "Even Key", -}; - -static const value_string unique_no_phs[] = { - { 0, "No PHS on current packet" }, - { 0, NULL } -}; - -/* Fragmentation Flags / Sequence */ -static guint8 frag_flags; -static guint8 frag_seq; -static guint16 frag_sid; - -/* - * Defragmentation of DOCSIS - */ -static reassembly_table docsis_reassembly_table; - - -static const fragment_items docsis_frag_items = { - &ett_docsis_fragment, - &ett_docsis_fragments, - &hf_docsis_fragments, - &hf_docsis_fragment, - &hf_docsis_fragment_overlap, - &hf_docsis_fragment_overlap_conflict, - &hf_docsis_fragment_multiple_tails, - &hf_docsis_fragment_too_long_fragment, - &hf_docsis_fragment_error, - &hf_docsis_fragment_count, - &hf_docsis_reassembled_in, - &hf_docsis_reassembled_length, - &hf_docsis_reassembled_data, - "DOCSIS fragments" -}; - -/* Dissection */ -/* Code to Dissect the extended header; TLV Formatted headers */ -static void -dissect_ehdr (tvbuff_t * tvb, proto_tree * tree, packet_info * pinfo) -{ - proto_tree *ehdr_tree; - proto_item *eh_length_item; - gint ehdrlen; - int pos; - guint8 type; - guint8 len; - - ehdrlen = tvb_get_guint8 (tvb, 1); - pos = 4; - - ehdr_tree = proto_tree_add_subtree(tree, tvb, pos, ehdrlen, ett_ehdr, NULL, "Extended Header"); - - while (pos < ehdrlen + 4) - { - type = (tvb_get_guint8 (tvb, pos) & 0xF0); - len = (tvb_get_guint8 (tvb, pos) & 0x0F); - if ((((type >> 4) & 0x0F)== 6) && (len == 2)) - { - proto_tree_add_uint_format_value(ehdr_tree, hf_docsis_eh_type, tvb, pos, 1, 0x60, "Unsolicited Grant Sync EHDR Sub-Element"); - } - else - { - proto_tree_add_item (ehdr_tree, hf_docsis_eh_type, tvb, pos, 1, ENC_BIG_ENDIAN); - } - - eh_length_item = proto_tree_add_item (ehdr_tree, hf_docsis_eh_len, tvb, pos, 1, ENC_BIG_ENDIAN); - - - switch ((type >> 4) & 0x0F) - { - case EH_REQUEST: - /* Request: Minislots Requested */ - if (len == 3) - { - proto_tree_add_item(ehdr_tree, hf_docsis_mini_slots, tvb, pos + 1, 1, ENC_NA); - proto_tree_add_item(ehdr_tree, hf_docsis_sid, tvb, pos + 2, 2, ENC_BIG_ENDIAN); - } - else - { - expert_add_info(pinfo, eh_length_item, &ei_docsis_eh_len); - return; - } - break; - case EH_ACK_REQ: - /* Deprecated in DOCSIS 3.1 */ - if (len == 2) - { - proto_tree_add_item(ehdr_tree, hf_docsis_sid, tvb, pos + 1, 2, ENC_BIG_ENDIAN); - } - else - { - expert_add_info(pinfo, eh_length_item, &ei_docsis_eh_len); - return; - } - break; - case EH_BP_UP: - /* Upstream Privacy EH Element or Upstream Privacy with fragmentation */ - proto_tree_add_item (ehdr_tree, hf_docsis_key_seq, tvb, pos + 1, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_ver, tvb, pos + 1, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_bpi_en, tvb, pos + 2, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_toggle_bit, tvb, pos + 2, - 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_sid, tvb, pos + 2, 2, - ENC_BIG_ENDIAN); - frag_sid = tvb_get_guint8 (tvb, pos+2) & 0xCFFF; - proto_tree_add_item (ehdr_tree, hf_docsis_mini_slots, tvb, pos + 4, - 1, ENC_BIG_ENDIAN); - if (pinfo->fragmented) - { - proto_tree_add_item (ehdr_tree, hf_docsis_frag_rsvd, tvb, pos+5, - 1, ENC_BIG_ENDIAN); - frag_flags = tvb_get_guint8 (tvb, pos+5) & 0x30; - proto_tree_add_item (ehdr_tree, hf_docsis_frag_first, tvb, pos+5, - 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_frag_last, tvb, pos+5, - 1, ENC_BIG_ENDIAN); - frag_seq = tvb_get_guint8 (tvb, pos+5) & 0x0F; - proto_tree_add_item (ehdr_tree, hf_docsis_frag_seq, tvb, pos+5, - 1, ENC_BIG_ENDIAN); - } - break; - case EH_BP_DOWN: - /* Downstream Privacy EH Element */ - proto_tree_add_item (ehdr_tree, hf_docsis_key_seq, tvb, pos + 1, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_ver, tvb, pos + 1, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_bpi_en, tvb, pos + 2, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_toggle_bit, tvb, pos + 2, - 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_said, tvb, pos + 2, 2, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_reserved, tvb, pos + 4, 1, - ENC_BIG_ENDIAN); - break; - case EH_SFLOW_HDR_DOWN: - /* Deprecated in DOCSIS 3.1, was Downstream Service Flow EH Element in earlier revisions */ - case EH_SFLOW_HDR_UP: - /* Deprecated in DOCSIS 3.1, was Upstream Service Flow EH Element in earlier revisions */ - proto_tree_add_item(ehdr_tree, hf_docsis_ehdr_phsi, tvb, pos+1, 1, ENC_BIG_ENDIAN); - - if (len == 2) - { - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_qind, tvb, pos+2, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_grants, tvb, pos+2, 1, ENC_BIG_ENDIAN); - } - break; - case EH_BP_UP2: - /* Upstream Privacy EH Element, version 2, with no piggyback request */ - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_bpup2_key_seq, tvb, pos + 1, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_bpup2_ver, tvb, pos + 1, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_bpup2_bpi_en, tvb, pos + 2, 1, - ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_bpup2_toggle_bit, tvb, pos + 2, - 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_bpup2_sid, tvb, pos + 2, 2, - ENC_BIG_ENDIAN); - break; - case EH_DS_SERVICE: - /* Downstream Service EH Element */ - proto_tree_add_item(ehdr_tree, hf_docsis_ehdr_ds_traffic_pri, tvb, pos+1, 1, ENC_BIG_ENDIAN); - - if (len == 3) - { - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_ds_dsid, tvb, pos+1, 3, ENC_BIG_ENDIAN); - } - - if (len == 5) - { - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_ds_seq_chg_cnt, tvb, pos+1, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_ds_dsid, tvb, pos+1, 3, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_ds_pkt_seq_num, tvb, pos+4, 2, ENC_BIG_ENDIAN); - } - break; - case EH_PATH_VERIFY: - /* Path Verify EH Element */ - if (len == 5) - { - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_pv_st_refpt, tvb, pos+1, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (ehdr_tree, hf_docsis_ehdr_pv_timestamp, tvb, pos+2, 4, ENC_BIG_ENDIAN); - } - break; - case EH_EXTENDED: - /* Extended EH Element, one or more Sub EH fields may follow; simply recurse */ - { - tvbuff_t *subset = tvb_new_subset_remaining(tvb, pos); - dissect_ehdr (subset, ehdr_tree, pinfo); - } - break; - default: - if (len > 0) - proto_tree_add_item (ehdr_tree, hf_docsis_eh_val, tvb, pos + 1, - len, ENC_NA); - } - pos += len + 1; - } - - return; -} - -/* Code to Dissect the Header Check Sequence field */ -static void -dissect_hcs_field (tvbuff_t * tvb, packet_info * pinfo, proto_tree * docsis_tree, gint hdrlen) -{ - /* dissect the header check sequence */ - if(docsis_check_fcs){ - /* CRC-CCITT(16+12+5+1) */ - guint16 fcs = g_ntohs(crc16_ccitt_tvb(tvb, (hdrlen - 2))); - proto_tree_add_checksum(docsis_tree, tvb, (hdrlen - 2), hf_docsis_hcs, hf_docsis_hcs_status, &ei_docsis_hcs_bad, pinfo, fcs, ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY); - } - else - { - proto_tree_add_checksum(docsis_tree, tvb, (hdrlen - 2), hf_docsis_hcs, hf_docsis_hcs_status, &ei_docsis_hcs_bad, pinfo, 0, ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS); - } - return; -} - -/* Code to Dissect the extended header length / MAC Param field and Length field */ -/* The length field may condain a SID, but this logic is not handled here */ -static void -dissect_exthdr_length_field (tvbuff_t * tvb, packet_info * pinfo, proto_tree * docsis_tree, guint8 exthdr, guint16 mac_parm, guint16 len_sid, guint16 *payload_length) -{ - proto_item *length_item; - if (exthdr == EXT_HDR_ON) - { - /* Add in Extended Header Length */ - proto_tree_add_item (docsis_tree, hf_docsis_ehdrlen, tvb, 1, 1, ENC_BIG_ENDIAN); - length_item = proto_tree_add_item (docsis_tree, hf_docsis_len, tvb, 2, 2, ENC_BIG_ENDIAN); - /* Validate PDU length */ - if ((len_sid - mac_parm) > *payload_length) - { - *payload_length = len_sid; - expert_add_info(pinfo, length_item, &ei_docsis_len); - } - /* Pass off to the Extended Header dissection */ - dissect_ehdr (tvb, docsis_tree, pinfo); - } - else - { - /* Add in MAC Parm field only */ - proto_tree_add_item (docsis_tree, hf_docsis_macparm, tvb, 1, 1, ENC_BIG_ENDIAN); - length_item = proto_tree_add_item (docsis_tree, hf_docsis_len, tvb, 2, 2, ENC_BIG_ENDIAN); - /* Validate PDU length */ - if (len_sid > *payload_length) - { - *payload_length = len_sid; - expert_add_info(pinfo, length_item, &ei_docsis_len); - } - } - return; -} - -/* Main DOCSIS Dissection Entry Point */ -/* Code to Dissect the DOCSIS Frames */ -static int -dissect_docsis (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void* data _U_) -{ - guint8 fc = 0; - guint8 fctype = 0; - guint8 fcparm = 0; - guint8 exthdr = 0; - guint16 mac_parm = 0; - guint8 hdrlen = DOCSIS_MIN_HEADER_LEN; - guint16 len_sid = 0; - tvbuff_t *next_tvb = NULL; - tvbuff_t *mgt_tvb = NULL; - gint pdulen = 0; - guint16 payload_length = 0; - guint16 framelen = 0; - gboolean save_fragmented; - - proto_item *ti; - proto_tree *docsis_tree; - - /* concatlen and concatpos are declared static to allow for recursive calls to - * the dissect_docsis routine when dissecting Concatenated frames - */ - static guint16 concatlen; - static guint16 concatpos; - - /* Extract Frame Control parts */ - fc = tvb_get_guint8 (tvb, 0); /* Frame Control Byte */ - fctype = (fc >> 6) & 0x03; /* Frame Control Type: 2 MSB Bits */ - fcparm = (fc >> 1) & 0x1F; /* Frame Control Parameter: Next 5 Bits */ - exthdr = (fc & 0x01); /* Extended Header Bit: LSB */ - - /* Extract the MAC Parm; MAC Parm and SID offsets; change for a Queue Depth Request */ - if (fcparm == FCPARM_QUEUE_DEPTH_REQ_FRM) { - mac_parm = tvb_get_ntohs (tvb, 1); - len_sid = tvb_get_ntohs (tvb, 3); - hdrlen = DOCSIS_MIN_HEADER_LEN + 1; // 7-byte header for this message type - } else { - mac_parm = tvb_get_guint8 (tvb, 1); - len_sid = tvb_get_ntohs (tvb, 2); - } - - /* Set Header Length based on presence of Extended header */ - if (exthdr == EXT_HDR_ON) { - hdrlen += mac_parm; - } - - /* Captured Payload Length is based on the length of the header */ - payload_length = tvb_captured_length_remaining (tvb, hdrlen); - - /* If this is a Request Frame, then pdulen is 0 and framelen is 6 */ - if ((fctype == FCTYPE_MACSPC) && (fcparm == FCPARM_RQST_FRM || fcparm == FCPARM_QUEUE_DEPTH_REQ_FRM)) - { - pdulen = 0; - if (fcparm == FCPARM_QUEUE_DEPTH_REQ_FRM) - framelen = DOCSIS_MIN_HEADER_LEN + 1; - else - framelen = DOCSIS_MIN_HEADER_LEN; - } else { - framelen = DOCSIS_MIN_HEADER_LEN + len_sid; - pdulen = len_sid - (mac_parm + 2); - } - - /* Make entries in Protocol column and Info column on summary display */ - col_set_str (pinfo->cinfo, COL_PROTOCOL, "DOCSIS"); - - switch (fctype) - { - case FCTYPE_PACKET: - col_set_str (pinfo->cinfo, COL_INFO, "Packet PDU"); - break; - case FCTYPE_RESERVED: - col_set_str (pinfo->cinfo, COL_INFO, "Reserved PDU"); - break; - case FCTYPE_ISOLAT: - col_set_str (pinfo->cinfo, COL_INFO, "Isolation PDU"); - break; - case FCTYPE_MACSPC: - if (fcparm == FCPARM_RQST_FRM) - col_add_fstr (pinfo->cinfo, COL_INFO, - "Request Frame SID = %u Mini Slots = %u", len_sid, - mac_parm); - else if (fcparm == FCPARM_QUEUE_DEPTH_REQ_FRM) - col_add_fstr (pinfo->cinfo, COL_INFO, - "Request Frame SID = %u Bytes Requested = %u", len_sid, - mac_parm); - else if (fcparm == FCPARM_FRAG_HDR) - col_set_str (pinfo->cinfo, COL_INFO, "Fragmented Frame"); - else - col_set_str (pinfo->cinfo, COL_INFO, "Mac Specific"); - break; - } /* switch fctype */ - - ti = proto_tree_add_item(tree, proto_docsis, tvb, 0, hdrlen, ENC_NA); - docsis_tree = proto_item_add_subtree (ti, ett_docsis); - - /* add an item to the subtree, see section 1.6 for more information */ - - /* Add in FC Byte fields */ - proto_tree_add_item (docsis_tree, hf_docsis_fctype, tvb, 0, 1, ENC_BIG_ENDIAN); - - switch (fctype) - { - case FCTYPE_PACKET: - { - proto_item_append_text (ti, " Packet PDU"); - proto_tree_add_item (docsis_tree, hf_docsis_fcparm, tvb, 0, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (docsis_tree, hf_docsis_exthdr, tvb, 0, 1, ENC_BIG_ENDIAN); - /* Dissect Length field for a PDU */ - dissect_exthdr_length_field (tvb, pinfo, docsis_tree, exthdr, mac_parm, len_sid, &payload_length); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - if (pdulen > 0) - { - next_tvb = tvb_new_subset_remaining(tvb, hdrlen); - call_dissector (eth_withoutfcs_handle, next_tvb, pinfo, docsis_tree); - } - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - break; - } - case FCTYPE_RESERVED: - { - proto_item_append_text (ti, " Reserved PDU"); - proto_tree_add_item (docsis_tree, hf_docsis_fcparm, tvb, 0, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (docsis_tree, hf_docsis_exthdr, tvb, 0, 1, ENC_BIG_ENDIAN); - /* Dissect Length field for a PDU */ - dissect_exthdr_length_field (tvb, pinfo, docsis_tree, exthdr, mac_parm, len_sid, &payload_length); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - - /* Don't do anything for a Reserved Frame */ - next_tvb = tvb_new_subset_remaining(tvb, hdrlen); - call_data_dissector(next_tvb, pinfo, tree); - break; - } - case FCTYPE_ISOLAT: - { - proto_item_append_text (ti, " Isolation PDU"); - proto_tree_add_item (docsis_tree, hf_docsis_fcparm, tvb, 0, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (docsis_tree, hf_docsis_exthdr, tvb, 0, 1, ENC_BIG_ENDIAN); - /* Dissect Length field for a PDU */ - dissect_exthdr_length_field (tvb, pinfo, docsis_tree, exthdr, mac_parm, len_sid, &payload_length); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - if (pdulen > 0) - { - next_tvb = tvb_new_subset_remaining(tvb, hdrlen); - call_dissector (eth_withoutfcs_handle, next_tvb, pinfo, docsis_tree); - } - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - break; - } - case FCTYPE_MACSPC: - { - proto_item_append_text (ti, " MAC-Specific PDU"); - proto_tree_add_item (docsis_tree, hf_docsis_machdr_fcparm, tvb, 0, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (docsis_tree, hf_docsis_exthdr, tvb, 0, 1, ENC_BIG_ENDIAN); - switch(fcparm) - { - case FCPARM_TIMING_HDR: - // no break - case FCPARM_MAC_MGMT_HDR: - { - /* Dissect Length field for a PDU */ - dissect_exthdr_length_field (tvb, pinfo, docsis_tree, exthdr, mac_parm, len_sid, &payload_length); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - - /* Pass off to the DOCSIS Management dissector/s */ - mgt_tvb = tvb_new_subset_remaining(tvb, hdrlen); - call_dissector (docsis_mgmt_handle, mgt_tvb, pinfo, docsis_tree); - - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - - break; - } - case FCPARM_RQST_FRM: - { - /* Decode for a Request Frame. No extended header */ - proto_tree_add_uint (docsis_tree, hf_docsis_mini_slots, tvb, 1, 1, mac_parm); - proto_tree_add_uint (docsis_tree, hf_docsis_sid, tvb, 2, 2, len_sid); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - - /* Don't do anything for a Request Frame, there is no data following it*/ - break; - } - case FCPARM_FRAG_HDR: - { - /* Check if this is a fragmentation header */ - save_fragmented = pinfo->fragmented; - pinfo->fragmented = TRUE; - - /* Dissect Length field for a PDU */ - dissect_exthdr_length_field (tvb, pinfo, docsis_tree, exthdr, mac_parm, len_sid, &payload_length); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - - /* Grab the Fragment FCS */ - guint32 sent_fcs = tvb_get_ntohl(tvb, (hdrlen + len_sid - 4)); - guint32 fcs = crc32_802_tvb(tvb, tvb_captured_length(tvb) - 4); - - /* Only defragment valid frames with a good FCS */ - if (sent_fcs == fcs) - { - fragment_item *frag_msg = NULL; - frag_msg = fragment_add_seq_check(&docsis_reassembly_table, - tvb, hdrlen, pinfo, - frag_sid, NULL, /* ID for fragments belonging together */ - frag_seq, /* Fragment Sequence Number */ - (len_sid - 4), /* fragment length - to the end */ - !(frag_flags & FRAG_LAST)); /* More fragments? */ - - next_tvb = process_reassembled_data(tvb, hdrlen, pinfo, - "Reassembled Message", frag_msg, &docsis_frag_items, - NULL, docsis_tree); - - if (frag_flags == FRAG_LAST) - pinfo->fragmented = FALSE; - else - pinfo->fragmented = TRUE; - - if (frag_msg) { /* Reassembled */ - proto_item_append_text (ti, " (Message Reassembled)"); - } else { /* Not last packet of reassembled Short Message */ - proto_item_append_text (ti, " (Message fragment %u)", frag_seq); - - } - - if(next_tvb) - { - /* By default assume an Ethernet payload */ - call_dissector (eth_withoutfcs_handle, next_tvb, pinfo, docsis_tree); - } else { - /* Otherwise treat as Data */ - tvbuff_t *payload_tvb = tvb_new_subset_length_caplen(tvb, hdrlen, (len_sid - 4), -1); - call_data_dissector(payload_tvb, pinfo, docsis_tree); - } - } else { - /* Report frames with a bad FCS */ - expert_add_info(pinfo, ti, &ei_docsis_frag_fcs_bad); - } - - /* Add the Fragment FCS to the end of the parent tree */ - proto_tree_add_checksum(docsis_tree, tvb, (hdrlen + len_sid - 4), hf_docsis_frag_fcs, hf_docsis_frag_fcs_status, &ei_docsis_frag_fcs_bad, pinfo, fcs, ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY); - - pinfo->fragmented = save_fragmented; - - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - - break; - } - case FCPARM_QUEUE_DEPTH_REQ_FRM: - { - /* Decode for a Queue-depth Based Request */ - proto_tree_add_uint (docsis_tree, hf_docsis_requested_size, tvb, 1, 2, mac_parm); - proto_tree_add_uint (docsis_tree, hf_docsis_sid, tvb, 3, 2, len_sid); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - - if (concatlen > 0) - { - concatlen = concatlen - framelen; - concatpos += framelen; - } - - /* No PDU Payload for this frame */ - break; - } - case FCPARM_CONCAT_HDR: - { - /* Decode for a Concatenated Header; ONLY for DOCSIS versions < 3.1. No Extended Header */ - proto_item_append_text (ti, " (Concatenated Header)"); - proto_tree_add_item (docsis_tree, hf_docsis_concat_cnt, tvb, 1, 1, ENC_BIG_ENDIAN); - proto_tree_add_item (docsis_tree, hf_docsis_len, tvb, 2, 2, ENC_BIG_ENDIAN); - /* Dissect Header Check Sequence field for a PDU */ - dissect_hcs_field (tvb, pinfo, docsis_tree, hdrlen); - - /* If this is a concatenated frame setup the length of the concatenated - * frame and set the position to the first byte of the first frame - */ - concatlen = len_sid; - concatpos = DOCSIS_MIN_HEADER_LEN; - - /* Call the docsis dissector on the same frame - * to dissect DOCSIS frames within the concatenated - * frame. concatpos and concatlen are declared - * static and are decremented and incremented - * respectively when the inner - * docsis frames are dissected. */ - while (concatlen > 0) - { - next_tvb = tvb_new_subset_length_caplen (tvb, concatpos, -1, concatlen); - call_dissector (docsis_handle, next_tvb, pinfo, docsis_tree); - } - concatlen = 0; - concatpos = 0; - break; - } - default: - /* Unknown parameter, stop dissection */ - concatlen = 0; - break; - } /* switch fcparm */ - break; - } - } /* switch fctype*/ - - return tvb_captured_length(tvb); -} - -/* Register the protocol with Wireshark */ -void -proto_register_docsis (void) -{ - static hf_register_info hf[] = { - {&hf_docsis_fctype, - {"FCType", "docsis.fctype", - FT_UINT8, BASE_HEX, VALS (fctype_vals), 0xC0, - "Frame Control Type", HFILL} - }, - {&hf_docsis_fcparm, - {"FCParm", "docsis.fcparm", - FT_UINT8, BASE_DEC, VALS (pkt_fcparm_vals), 0x3E, - "Parameter Field", HFILL} - }, - {&hf_docsis_machdr_fcparm, - {"FCParm", "docsis.fcparm", - FT_UINT8, BASE_DEC, VALS (ms_fcparm_vals), 0x3E, - "Parameter Field", HFILL} - }, - {&hf_docsis_exthdr, - {"EXTHDR", "docsis.exthdr", - FT_BOOLEAN, 8, TFS (&exthdr_tfs), 0x01, - "Extended Header Presence", HFILL} - }, - {&hf_docsis_macparm, - {"MacParm", "docsis.macparm", - FT_UINT8, BASE_HEX, NULL, 0x0, - "Mac Parameter Field", HFILL} - }, - {&hf_docsis_concat_cnt, - {"Number of Concatenated Frames", "docsis.concat_cnt", - FT_UINT8, BASE_DEC, NULL, 0x0, - NULL, HFILL} - }, - {&hf_docsis_ehdrlen, - {"Extended Header Length (bytes)", "docsis.ehdrlen", - FT_UINT8, BASE_DEC, NULL, 0x0, - NULL, HFILL} - }, - {&hf_docsis_len, - {"Length of the MAC frame (bytes)", "docsis.len", - FT_UINT16, BASE_DEC, NULL, 0x0, - "Length of the MAC frame, not counting the fixed-length MAC header", HFILL} - }, - {&hf_docsis_eh_type, - {"Type", "docsis.ehdr.type", - FT_UINT8, BASE_DEC, VALS (eh_type_vals), 0xF0, - "TLV Type", HFILL} - }, - {&hf_docsis_eh_len, - {"Length", "docsis.ehdr.len", - FT_UINT8, BASE_DEC, NULL, 0x0F, - "TLV Len", HFILL} - }, - {&hf_docsis_eh_val, - {"Value", "docsis.ehdr.value", - FT_BYTES, BASE_NONE, NULL, 0x0, - "TLV Value", HFILL} - }, - {&hf_docsis_frag_rsvd, - {"Reserved", "docsis.frag_rsvd", - FT_UINT8, BASE_DEC, NULL, 0xC0, - NULL, HFILL} - }, - {&hf_docsis_frag_first, - {"First Frame", "docsis.frag_first", - FT_BOOLEAN, 8, NULL, 0x20, - NULL, HFILL} - }, - {&hf_docsis_frag_last, - {"Last Frame", "docsis.frag_last", - FT_BOOLEAN, 8, NULL, 0x10, - NULL, HFILL} - }, - {&hf_docsis_frag_seq, - {"Fragmentation Sequence #", "docsis.frag_seq", - FT_UINT8, BASE_DEC, NULL, 0x0F, - "Fragmentation Sequence Number", HFILL} - }, - {&hf_docsis_sid, - {"SID", "docsis.ehdr.sid", - FT_UINT16, BASE_DEC_HEX, NULL, 0x3FFF, - "Service Identifier", HFILL} - }, - {&hf_docsis_said, - {"SAID", "docsis.ehdr.said", - FT_UINT16, BASE_DEC, NULL, 0x3FFF, - "Security Association Identifier", HFILL} - }, - {&hf_docsis_reserved, - {"Reserved", "docsis.ehdr.rsvd", - FT_UINT8, BASE_HEX, NULL, 0x3FFF, - "Reserved Byte", HFILL} - }, - {&hf_docsis_mini_slots, - {"MiniSlots", "docsis.ehdr.minislots", - FT_UINT8, BASE_DEC, NULL, 0x0, - "Mini Slots Requested", HFILL} - }, - {&hf_docsis_requested_size, - {"Bytes Requested", "docsis.ehdr.reqsize", - FT_UINT16, BASE_DEC, NULL, 0xFFFF, - NULL, HFILL} - }, - {&hf_docsis_key_seq, - {"Key Sequence", "docsis.ehdr.keyseq", - FT_UINT8, BASE_DEC, NULL, 0xF0, - NULL, HFILL} - }, - {&hf_docsis_ehdr_ver, - {"Version", "docsis.ehdr.ver", - FT_UINT8, BASE_DEC, NULL, 0x0F, - NULL, HFILL} - }, - {&hf_docsis_ehdr_phsi, - {"Payload Header Suppression Index", "docsis.ehdr.phsi", - FT_UINT8, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_no_phs), 0x0, - NULL, HFILL} - }, - {&hf_docsis_ehdr_qind, - {"Queue Indicator", "docsis.ehdr.qind", - FT_BOOLEAN, 8, TFS(&qind_tfs), 0x80, - NULL, HFILL} - }, - {&hf_docsis_ehdr_grants, - {"Active Grants", "docsis.ehdr.act_grants", - FT_UINT8, BASE_DEC, NULL, 0x7F, - NULL, HFILL} - }, - {&hf_docsis_ehdr_bpup2_key_seq, - {"Key Sequence", "docsis.ehdr.bpup2_keyseq", - FT_UINT8, BASE_DEC, NULL, 0xF0, - NULL, HFILL} - }, - {&hf_docsis_ehdr_bpup2_ver, - {"Version", "docsis.ehdr.bpup2_ver", - FT_UINT8, BASE_DEC, NULL, 0x0F, - NULL, HFILL} - }, - {&hf_docsis_ehdr_bpup2_bpi_en, - {"Encryption", "docsis.ehdr.bpup2_bpi_en", - FT_BOOLEAN, 8, TFS (&ena_dis_tfs), 0x80, - "BPI Enable", HFILL} - }, - {&hf_docsis_ehdr_bpup2_toggle_bit, - {"Toggle", "docsis.ehdr.bpup2_toggle_bit", - FT_BOOLEAN, 8, TFS (&odd_even_tfs), 0x40, - NULL, HFILL} - }, - {&hf_docsis_ehdr_bpup2_sid, - {"SID", "docsis.ehdr.bpup2_sid", - FT_UINT16, BASE_DEC, NULL, 0x3FFF, - "Service Identifier", HFILL} - }, - { &hf_docsis_ehdr_pv_st_refpt, - { "Start Reference Point", "docsis.ehdr.pv_start_ref", - FT_UINT8, BASE_DEC, NULL, 0x0, - NULL, HFILL} - }, - { &hf_docsis_ehdr_pv_timestamp, - { "Timestamp", "docsis.ehdr.pv_timestamp", - FT_UINT32, BASE_DEC, NULL, 0x0, - NULL, HFILL} - }, - {&hf_docsis_ehdr_ds_traffic_pri, - {"DS Traffic Priority", "docsis.ehdr.ds_traffic_pri", - FT_UINT8, BASE_DEC, NULL, 0xE0, - NULL, HFILL} - }, - {&hf_docsis_ehdr_ds_seq_chg_cnt, - {"DS Sequence Change Count", "docsis.ehdr.ds_seq_chg_cnt", - FT_UINT8, BASE_DEC, NULL, 0x10, - NULL, HFILL} - }, - {&hf_docsis_ehdr_ds_dsid, - {"DS DSID", "docsis.ehdr.ds_dsid", - FT_UINT32, BASE_DEC, NULL, 0x0FFFFF, - NULL, HFILL} - }, - {&hf_docsis_ehdr_ds_pkt_seq_num, - {"DS Packet Sequence Number", "docsis.ehdr.ds_pkt_seq_num", - FT_UINT16, BASE_DEC, NULL, 0x0, - NULL, HFILL} - }, - {&hf_docsis_hcs, - {"Header check sequence", "docsis.hcs", - FT_UINT16, BASE_HEX, NULL, 0x0, - NULL, HFILL} - }, - { &hf_docsis_hcs_status, - { "HCS Status", "docsis.hcs.status", - FT_UINT8, BASE_NONE, VALS(local_proto_checksum_vals), 0x0, - NULL, HFILL} - }, - { &hf_docsis_bpi_en, - { "Encryption", "docsis.bpi_en", - FT_BOOLEAN, 8, TFS (&ena_dis_tfs), 0x80, - "BPI Enable", HFILL} - }, - { &hf_docsis_toggle_bit, - { "Toggle", "docsis.toggle_bit", - FT_BOOLEAN, 8, TFS (&odd_even_tfs), 0x40, - NULL, HFILL} - }, - { &hf_docsis_fragment_overlap, - { "Fragment overlap", "docsis.fragment.overlap", - FT_BOOLEAN, BASE_NONE, NULL, 0x0, - "Fragment overlaps with other fragments", HFILL} - }, - { &hf_docsis_fragment_overlap_conflict, - { "Conflicting data in fragment overlap", "docsis.fragment.overlap.conflict", - FT_BOOLEAN, BASE_NONE, NULL, 0x0, - "Overlapping fragments contained conflicting data", HFILL} - }, - { &hf_docsis_fragment_multiple_tails, - { "Multiple tail fragments found", "docsis.fragment.multipletails", - FT_BOOLEAN, BASE_NONE, NULL, 0x0, - "Several tails were found when defragmenting the packet", HFILL} - }, - { &hf_docsis_fragment_too_long_fragment, - { "Fragment too long", "docsis.fragment.toolongfragment", - FT_BOOLEAN, BASE_NONE, NULL, 0x0, - "Fragment contained data past end of packet", HFILL} - }, - { &hf_docsis_fragment_error, - { "Defragmentation error", "docsis.fragment.error", - FT_FRAMENUM, BASE_NONE, NULL, 0x0, - "Defragmentation error due to illegal fragments", HFILL} - }, - { &hf_docsis_fragment_count, - { "Fragment count", "docsis.fragment.count", - FT_UINT32, BASE_DEC, NULL, 0x0, - NULL, HFILL} - }, - { &hf_docsis_fragment, - { "DOCSIS Fragment", "docsis.fragment", - FT_FRAMENUM, BASE_NONE, NULL, 0x0, - NULL, HFILL} - }, - { &hf_docsis_fragments, - { "DOCSIS Fragments", "docsis.fragments", - FT_BYTES, BASE_NONE, NULL, 0x0, - NULL, HFILL} - }, - { &hf_docsis_reassembled_in, - { "Reassembled DOCSIS in frame", "docsis.reassembled_in", - FT_FRAMENUM, BASE_NONE, NULL, 0x0, - "This DOCSIS packet is reassembled in this frame", HFILL} - }, - { &hf_docsis_reassembled_length, - { "Reassembled DOCSIS length", "docsis.reassembled.length", - FT_UINT32, BASE_DEC, NULL, 0x0, - "The total length of the reassembled payload", HFILL} - }, - { &hf_docsis_reassembled_data, - { "Reassembled DOCSIS data", "docsis.reassembled.data", - FT_BYTES, BASE_NONE, NULL, 0x0, - "The reassembled payload", HFILL} - }, - { &hf_docsis_frag_fcs, - { "Fragment FCS", "docsis.frag.fcs", - FT_UINT32, BASE_HEX, NULL, 0x0, - NULL, HFILL} - }, - { &hf_docsis_frag_fcs_status, - { "Fragment FCS Status", "docsis.frag.fcs.status", - FT_UINT8, BASE_NONE, VALS(local_proto_checksum_vals), 0x0, - NULL, HFILL} - } - }; - - static ei_register_info ei[] = { - { &ei_docsis_hcs_bad, { "docsis.hcs_bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }}, - { &ei_docsis_len, { "docsis.len.past_end", PI_MALFORMED, PI_ERROR, "Length field value goes past the end of the payload", EXPFILL }}, - { &ei_docsis_frag_fcs_bad, { "docsis.frag.fcs_bad", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }}, - { &ei_docsis_eh_len, { "docsis.ehdr.len.past_end", PI_MALFORMED, PI_ERROR, "Extended Header Length Invalid!", EXPFILL }} - }; - - static gint *ett[] = { - &ett_docsis, - &ett_ehdr, - &ett_docsis_fragment, - &ett_docsis_fragments - }; - - module_t *docsis_module; - expert_module_t* expert_docsis; - - proto_docsis = proto_register_protocol ("DOCSIS", "DOCSIS", "docsis"); - proto_register_field_array (proto_docsis, hf, array_length (hf)); - proto_register_subtree_array (ett, array_length (ett)); - - /* register expert notifications */ - expert_docsis = expert_register_protocol(proto_docsis); - expert_register_field_array(expert_docsis, ei, array_length(ei)); - - /* Register configuration preferences */ - docsis_module = prefs_register_protocol(proto_docsis, NULL); - prefs_register_bool_preference(docsis_module, "check_fcs", - "Validate the DOCSIS checksum if possible", - "Whether or not to validate the Header Check Sequence", - &docsis_check_fcs); - -#if 0 - docsis_dissector_table = register_dissector_table ("docsis", - "DOCSIS Encapsulation Type", proto_docsis, - FT_UINT8, BASE_DEC); -#endif - - docsis_handle = register_dissector ("docsis", dissect_docsis, proto_docsis); - reassembly_table_register(&docsis_reassembly_table, - &addresses_reassembly_table_functions); -} - -void -proto_reg_handoff_docsis (void) -{ - dissector_add_uint ("wtap_encap", WTAP_ENCAP_DOCSIS, docsis_handle); - - docsis_mgmt_handle = find_dissector ("docsis_mgmt"); - eth_withoutfcs_handle = find_dissector_add_dependency("eth_withoutfcs", proto_docsis); -} - -/* - * Editor modelines - http://www.wireshark.org/tools/modelines.html - * - * Local Variables: - * c-basic-offset: 2 - * tab-width: 8 - * indent-tabs-mode: nil - * End: - * - * ex: set shiftwidth=2 tabstop=8 expandtab: - * :indentSize=2:tabSize=8:noTabs=true: - */ |