diff options
Diffstat (limited to '')
| -rw-r--r-- | epan/dissectors/packet-docsis-vendor.c | 887 |
1 files changed, 887 insertions, 0 deletions
diff --git a/epan/dissectors/packet-docsis-vendor.c b/epan/dissectors/packet-docsis-vendor.c new file mode 100644 index 00000000..52ca798d --- /dev/null +++ b/epan/dissectors/packet-docsis-vendor.c @@ -0,0 +1,887 @@ +/* packet-vendor.c + * Routines for Vendor Specific Encodings 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 + */ + + +/* Notes to Adding dissectors for Vendor specific TLVs: + * 1. Create a dissect_<vendorname> function with the following prototype: + * dissect_foovendor(tvbuff_t *tvb, proto_tree *tree, gint vsif_len) + * 2. vsif_len will be the *entire* length of the vsif TLV (including the + * Vendor ID TLV, which is 5 bytes long). + * 3. Create a new 'case' statement in dissect_vsif, for your specific Vendor + * ID. + * 4. In that 'case' statement you will make the following calls: + * (assume for this example that your vendor ID is 0x000054) + * #define VENDOR_FOOVENDOR 0x00054 + * case VENDOR_FOOVENDOR: + * proto_item_append_text (it, " (foo vendor)"); + * dissect_foovendor (tvb, vsif_tree, vsif_len); + * break; + * 5. Please see dissect_cisco for an example of how to do this. + */ + +#include "config.h" + +#include <epan/packet.h> +#include <epan/expert.h> + +/* Define Vendor ID's here */ +#define VENDOR_CISCO 0x00000C +#define VENDOR_GENERAL 0xFFFFFF + +void proto_register_docsis_vsif(void); +void proto_reg_handoff_docsis_vsif(void); + +/* Initialize the protocol and registered fields */ +static int proto_docsis_vsif = -1; +static int hf_docsis_vsif_vendorid = -1; +static int hf_docsis_vsif_vendor_unknown = -1; +static int hf_docsis_vsif_cisco_numphones = -1; +/* static int hf_docsis_vsif_cisco_ipprec = -1; */ +static int hf_docsis_vsif_cisco_ipprec_val = -1; +static int hf_docsis_vsif_cisco_ipprec_bw = -1; +static int hf_docsis_vsif_cisco_config_file = -1; + +static int hf_docsis_vsif_gex_loadbal_policy_id = -1; +static int hf_docsis_vsif_gex_loadbal_priority = -1; +static int hf_docsis_vsif_gex_loadbal_group_id = -1; +static int hf_docsis_vsif_gex_ranging_class_id_extension = -1; +static int hf_docsis_vsif_gex_l2vpn_encoding = -1; +static int hf_docsis_vsif_gex_ecm = -1; +static int hf_docsis_vsif_gex_sav = -1; +static int hf_docsis_vsif_gex_cmam = -1; +static int hf_docsis_vsif_gex_imja = -1; +static int hf_docsis_vsif_gex_service_type_identifier = -1; + +static int hf_docsis_vsif_gex_ecm_extended_cmts_mic_hmac_type = -1; +static int hf_docsis_vsif_gex_ecm_extended_cmts_mic_bitmap = -1; +static int hf_docsis_vsif_gex_ecm_explicit_extended_cmts_mic_digest_subtype = -1; + +static int hf_docsis_vsif_gex_sav_group_name = -1; +static int hf_docsis_vsif_gex_sav_static_prefix_rule = -1; + +static int hf_docsis_vsif_gex_sav_static_prefix_addressv4 = -1; +static int hf_docsis_vsif_gex_sav_static_prefix_addressv6 = -1; +static int hf_docsis_vsif_gex_sav_static_prefix_length = -1; + +static int hf_docsis_vsif_gex_cmam_cm_required_downstream_attribute_mask = -1; +static int hf_docsis_vsif_gex_cmam_cm_forbidden_downstream_attribute_mask = -1; +static int hf_docsis_vsif_gex_cmam_cm_required_upstream_attribute_mask = -1; +static int hf_docsis_vsif_gex_cmam_cm_forbidden_upstream_attribute_mask = -1; + +static int hf_docsis_vsif_gex_imja_ip_multicast_profile_name = -1; +static int hf_docsis_vsif_gex_imja_ssr = -1; +static int hf_docsis_vsif_gex_imja_maximum_multicast_sessions = -1; + +static int hf_docsis_vsif_gex_imja_ssr_rule_priority = -1; +static int hf_docsis_vsif_gex_imja_ssr_authorization_action = -1; +static int hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv4 = -1; +static int hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv6 = -1; +static int hf_docsis_vsif_gex_imja_ssr_source_prefix_length = -1; +static int hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv4 = -1; +static int hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv6 = -1; +static int hf_docsis_vsif_gex_imja_ssr_group_prefix_length = -1; + +static int hf_docsis_vsif_tlv_unknown = -1; + + +/* Initialize the subtree pointers */ +static gint ett_docsis_vsif = -1; +static gint ett_docsis_vsif_ipprec = -1; +static gint ett_docsis_vsif_gex_ecm = -1; +static gint ett_docsis_vsif_gex_sav = -1; +static gint ett_docsis_vsif_gex_sav_spr = -1; +static gint ett_docsis_vsif_gex_cmam = -1; +static gint ett_docsis_vsif_gex_imja = -1; +static gint ett_docsis_vsif_gex_imja_ssr = -1; + + +static expert_field ei_docsis_vsif_tlvlen_bad = EI_INIT; +static expert_field ei_docsis_vsif_tlvtype_unknown = EI_INIT; + +static const value_string vendorid_vals[] = { + {VENDOR_CISCO, "Cisco Systems, Inc."}, + {VENDOR_GENERAL, "General Extension Information"}, + {0, NULL}, +}; + +static const value_string hmac_vals[] = { + {1, "MD5 HMAC [RFC 2104]"}, + {2, "MMH16-sigma-n HMAC [DOCSIS SECv3.0]"}, + {43, "Vendor Specific"}, + {0, NULL}, +}; + +static const value_string authorization_action_vals[] = { + {0, "permit"}, + {1, "deny"}, + {0, NULL}, +}; + + +/* Dissector for Cisco Vendor Specific TLVs */ + +#define NUM_PHONES 0x0a +#define IOS_CONFIG_FILE 0x80 +#define IP_PREC 0x0b +#define IP_PREC_VAL 0x01 +#define IP_PREC_BW 0x02 + +static void dissect_general_extension_information (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, + gint vsif_len); + + +static void +dissect_cisco (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, gint vsif_len) +{ + /* Start at pos = 5, since tvb includes the Vendor ID field */ + int pos = 5; + guint8 type, length; + proto_tree *ipprec_tree; + proto_item *ipprec_item; + int templen; + + while (pos < vsif_len) + { + /* Extract the type and length Fields from the TLV */ + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case NUM_PHONES: + proto_tree_add_item (tree, hf_docsis_vsif_cisco_numphones, tvb, + pos, length, ENC_BIG_ENDIAN); + break; + case IP_PREC: + ipprec_tree = + proto_tree_add_subtree(tree, tvb, pos, length, ett_docsis_vsif_ipprec, &ipprec_item, "IP Precedence"); + /* Handle Sub-TLVs in IP Precedence */ + templen = pos + length; + while (pos < templen) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case IP_PREC_VAL: + if (length == 1) + { + proto_tree_add_item (ipprec_tree, + hf_docsis_vsif_cisco_ipprec_val, tvb, + pos, length, ENC_BIG_ENDIAN); + } + else + { + expert_add_info_format(pinfo, ipprec_item, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + break; + case IP_PREC_BW: + if (length != 4) + { + proto_tree_add_item (ipprec_tree, + hf_docsis_vsif_cisco_ipprec_bw, tvb, + pos, length, ENC_BIG_ENDIAN); + } + else + { + expert_add_info_format(pinfo, ipprec_item, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + break; + default: + expert_add_info_format(pinfo, ipprec_item, &ei_docsis_vsif_tlvtype_unknown, "Unknown TLV: %u", type); + } + pos += length; + } + break; + case IOS_CONFIG_FILE: + proto_tree_add_item (tree, hf_docsis_vsif_cisco_config_file, tvb, + pos, length, ENC_ASCII); + } + pos += length; + } +} + +/* Dissection */ +static int +dissect_vsif (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void* data _U_) +{ + proto_item *it; + proto_tree *vsif_tree; + guint8 type; + guint8 length; + guint32 value; + gint vsif_len; + + /* get the reported length of the VSIF TLV */ + vsif_len = tvb_reported_length_remaining (tvb, 0); + + it = proto_tree_add_protocol_format (tree, proto_docsis_vsif, tvb, 0, -1, + "VSIF Encodings"); + vsif_tree = proto_item_add_subtree (it, ett_docsis_vsif); + proto_tree_add_item_ret_uint(vsif_tree, hf_docsis_vsif_vendorid, tvb, 2, 3, ENC_BIG_ENDIAN, &value); + + /* The first TLV in the VSIF encodings must be type 0x08 (Vendor ID) and + * length 3. + */ + type = tvb_get_guint8 (tvb, 0); + if (type != 0x08) + expert_add_info_format(pinfo, it, &ei_docsis_vsif_tlvtype_unknown, "Unknown TLV: %u", type); + + length = tvb_get_guint8 (tvb, 1); + if (length != 3) + expert_add_info_format(pinfo, it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + + /* switch on the Vendor ID */ + switch (value) + { + case VENDOR_CISCO: + proto_item_append_text (it, " (Cisco)"); + dissect_cisco (tvb, pinfo, vsif_tree, vsif_len); + break; + case VENDOR_GENERAL: + proto_item_append_text (it, " (General Extension Information)"); + dissect_general_extension_information (tvb, pinfo, vsif_tree, vsif_len); + break; + default: + proto_item_append_text (it, " (Unknown)"); + proto_tree_add_item (vsif_tree, hf_docsis_vsif_vendor_unknown, tvb, + 0, -1, ENC_NA); + break; + } + + return tvb_captured_length(tvb); +} + + +#define GEX_ECM_EXTENDED_CMTS_MIC_HMAC_TYPE 1 +#define GEX_ECM_EXTENDED_CMTS_MIC_BITMAP 2 +#define GEX_ECM_EXPLICIT_EXTENDED_CMTS_MIC_DIGEST_SUBTYPE 3 + +static void +dissect_extended_cmts_mic(tvbuff_t * tvb, proto_tree *tree, int start, guint16 len) +{ + proto_item *ecm_it; + proto_tree *ecm_tree; + guint8 type, length; + int pos = start; + + ecm_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_ecm, tvb, start, len, ENC_NA); + ecm_tree = proto_item_add_subtree(ecm_it, ett_docsis_vsif_gex_ecm); + + while (pos < (start + len)) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_ECM_EXTENDED_CMTS_MIC_HMAC_TYPE: + proto_tree_add_item (ecm_tree, hf_docsis_vsif_gex_ecm_extended_cmts_mic_hmac_type, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_ECM_EXTENDED_CMTS_MIC_BITMAP: + proto_tree_add_item (ecm_tree, hf_docsis_vsif_gex_ecm_extended_cmts_mic_bitmap, tvb, pos, length, ENC_NA); + break; + case GEX_ECM_EXPLICIT_EXTENDED_CMTS_MIC_DIGEST_SUBTYPE: + proto_tree_add_item (ecm_tree, hf_docsis_vsif_gex_ecm_explicit_extended_cmts_mic_digest_subtype, tvb, pos, length, ENC_NA); + break; + default: + proto_tree_add_item (ecm_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + break; + } /* switch */ + pos += length; + } /* while */ +} + +#define GEX_SAV_STATIC_PREFIX_ADDRESS 1 +#define GEX_SAV_STATIC_PREFIX_LENGTH 2 + +static void +dissect_sav_static_prefix_rule(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, guint16 len) +{ + proto_item *sav_spr_it; + proto_tree *sav_spr_tree; + guint8 type, length; + int pos = start; + + sav_spr_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_sav_static_prefix_rule, tvb, start, len, ENC_NA); + sav_spr_tree = proto_item_add_subtree(sav_spr_it, ett_docsis_vsif_gex_sav_spr); + + while (pos < (start + len)) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_SAV_STATIC_PREFIX_ADDRESS: + if (length == 4) { + proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_gex_sav_static_prefix_addressv4, tvb, pos, length, ENC_BIG_ENDIAN); + } else if (length == 6) { + proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_gex_sav_static_prefix_addressv6, tvb, pos, length, ENC_NA); + } else { + expert_add_info_format(pinfo, sav_spr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + break; + case GEX_SAV_STATIC_PREFIX_LENGTH: + if (length == 1) { + proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_gex_sav_static_prefix_length, tvb, pos, length, ENC_BIG_ENDIAN); + } else { + expert_add_info_format(pinfo, sav_spr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + break; + default: + proto_tree_add_item (sav_spr_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + break; + } /* switch */ + pos += length; + } /* while */ +} + + + +#define GEX_SAV_GROUP_NAME 1 +#define GEX_SAV_STATIC_PREFIX_RULE 2 + + +static void +dissect_sav(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, guint16 len) +{ + proto_item *sav_it; + proto_tree *sav_tree; + guint8 type, length; + int pos = start; + + sav_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_sav, tvb, start, len, ENC_NA); + sav_tree = proto_item_add_subtree(sav_it, ett_docsis_vsif_gex_sav); + + while (pos < (start + len)) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_SAV_GROUP_NAME: + proto_tree_add_item (sav_tree, hf_docsis_vsif_gex_sav_group_name, tvb, pos, length, ENC_ASCII); + break; + case GEX_SAV_STATIC_PREFIX_RULE: + dissect_sav_static_prefix_rule(tvb, pinfo, sav_tree, pos, length); + break; + default: + proto_tree_add_item (sav_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + break; + } /* switch */ + pos += length; + } /* while */ +} + + +#define GEX_CM_REQUIRED_DOWNSTREAM_ATTRIBUTE_MASK 1 +#define GEX_CM_FORBIDDEN_DOWNSTREAM_ATTRIBUTE_MASK 2 +#define GEX_CM_REQUIRED_UPSTREAM_ATTRIBUTE_MASK 3 +#define GEX_CM_FORBIDDEN_UPSTREAM_ATTRIBUTE_MASK 4 + +static void +dissect_cable_modem_attribute_masks(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, guint16 len) +{ + proto_item *cmam_it; + proto_tree *cmam_tree; + guint8 type, length; + int pos = start; + + cmam_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_cmam, tvb, start, len, ENC_NA); + cmam_tree = proto_item_add_subtree(cmam_it, ett_docsis_vsif_gex_cmam); + + while (pos < (start + len)) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_CM_REQUIRED_DOWNSTREAM_ATTRIBUTE_MASK: + if (length != 4) { + expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_required_downstream_attribute_mask, tvb, pos, length, ENC_NA); + break; + case GEX_CM_FORBIDDEN_DOWNSTREAM_ATTRIBUTE_MASK: + if (length != 4) { + expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_forbidden_downstream_attribute_mask, tvb, pos, length, ENC_NA); + break; + case GEX_CM_REQUIRED_UPSTREAM_ATTRIBUTE_MASK: + if (length != 4) { + expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_required_upstream_attribute_mask, tvb, pos, length, ENC_NA); + break; + case GEX_CM_FORBIDDEN_UPSTREAM_ATTRIBUTE_MASK: + if (length != 4) { + expert_add_info_format(pinfo, cmam_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (cmam_tree, hf_docsis_vsif_gex_cmam_cm_forbidden_upstream_attribute_mask, tvb, pos, length, ENC_NA); + break; + default: proto_tree_add_item (cmam_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + } /* switch */ + pos += length; + } /* while */ +} + + +#define GEX_IMJA_SSR_RULE_PRIORITY 1 +#define GEX_IMJA_SSR_AUTHORIZATION_ACTION 2 +#define GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_ADDRESS 3 +#define GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_LENGTH 4 +#define GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_ADDRESS 5 +#define GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_LENGTH 6 + + +static void +dissect_ip_multicast_join_authorization_static_session_rule(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, guint16 len) +{ + proto_item *imja_ssr_it; + proto_tree *imja_ssr_tree; + guint8 type, length; + int pos = start; + + imja_ssr_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_imja_ssr, tvb, start, len, ENC_NA); + imja_ssr_tree = proto_item_add_subtree(imja_ssr_it, ett_docsis_vsif_gex_imja_ssr); + + while (pos < (start + len)) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_IMJA_SSR_RULE_PRIORITY: + if (length != 1) { + expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_rule_priority, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_IMJA_SSR_AUTHORIZATION_ACTION: + if (length != 1) { + expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_authorization_action, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_ADDRESS: + if (length == 4) { + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv4, tvb, pos, length, ENC_BIG_ENDIAN); + } else if (length == 6) { + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv6, tvb, pos, length, ENC_NA); + } else { + expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + break; + case GEX_IMJA_SSR_AUTHORIZATION_SOURCE_PREFIX_LENGTH: + if (length != 1) { + expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_source_prefix_length, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_ADDRESS: + if (length == 4) { + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv4, tvb, pos, length, ENC_BIG_ENDIAN); + } else if (length == 6) { + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv6, tvb, pos, length, ENC_NA); + } else { + expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + break; + case GEX_IMJA_SSR_AUTHORIZATION_GROUP_PREFIX_LENGTH: + if (length != 1) { + expert_add_info_format(pinfo, imja_ssr_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_gex_imja_ssr_group_prefix_length, tvb, pos, length, ENC_BIG_ENDIAN); + break; + default: proto_tree_add_item (imja_ssr_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + } /* switch */ + pos += length; + } /* while */ +} + +#define GEX_IMJA_IP_MULTICAST_PROFILE_NAME 1 +#define GEX_IMJA_IP_MULTICAST_PROFILE_JOIN_AUTHORIZATION_STATIC_SESSION_RULE 2 +#define GEX_IMJA_MAXIMUM_MULTICAST_SESSIONS 3 + + +static void +dissect_ip_multicast_join_authorization(tvbuff_t * tvb, packet_info * pinfo, proto_tree *tree, int start, guint16 len) +{ + proto_item *imja_it; + proto_tree *imja_tree; + guint8 type, length; + int pos = start; + + imja_it = proto_tree_add_item (tree, hf_docsis_vsif_gex_imja, tvb, start, len, ENC_NA); + imja_tree = proto_item_add_subtree(imja_it, ett_docsis_vsif_gex_imja); + + while (pos < (start + len)) + { + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_IMJA_IP_MULTICAST_PROFILE_NAME: + if ((length < 1) || (length > 15)) { + expert_add_info_format(pinfo, imja_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (imja_tree, hf_docsis_vsif_gex_imja_ip_multicast_profile_name, tvb, pos, length, ENC_ASCII); + break; + case GEX_IMJA_IP_MULTICAST_PROFILE_JOIN_AUTHORIZATION_STATIC_SESSION_RULE: + dissect_ip_multicast_join_authorization_static_session_rule(tvb, pinfo, imja_tree, pos, length); + break; + case GEX_IMJA_MAXIMUM_MULTICAST_SESSIONS: + if (length != 2) { + expert_add_info_format(pinfo, imja_it, &ei_docsis_vsif_tlvlen_bad, "Wrong TLV length: %u", length); + } + proto_tree_add_item (imja_tree, hf_docsis_vsif_gex_imja_maximum_multicast_sessions, tvb, pos, length, ENC_BIG_ENDIAN); + break; + default: proto_tree_add_item (imja_tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + } /* switch */ + pos += length; + } /* while */ +} + + + +/* Dissector for General Extension TLVs */ + +#define GEX_CM_LOAD_BALANCING_POLICY_ID 1 +#define GEX_CM_LOAD_BALANCING_PRIORITY 2 +#define GEX_CM_LOAD_BALANCING_GROUP_ID 3 +#define GEX_CM_RANGING_CLASS_ID_EXTENSION 4 +#define GEX_L2VPN_ENCODING 5 +#define GEX_EXTENDED_CMTS_MIC_CONFIGURATION_SETTING 6 +#define GEX_EXTENDED_SAV 7 +#define GEX_CABLE_MODEM_ATTRIBUTE_MASKS 9 +#define GEX_IP_MULTICAST_JOIN_AUTHORIZATION 10 +#define GEX_SERVICE_TYPE_IDENTIFIER 11 + + + +static void +dissect_general_extension_information (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, gint vsif_len) +{ + /* Start at pos = 5, since tvb includes the Vendor ID field */ + int pos = 5; + guint8 type, length; + + while (pos < vsif_len) + { + /* Extract the type and length Fields from the TLV */ + type = tvb_get_guint8 (tvb, pos++); + length = tvb_get_guint8 (tvb, pos++); + switch (type) + { + case GEX_CM_LOAD_BALANCING_POLICY_ID: + proto_tree_add_item (tree, hf_docsis_vsif_gex_loadbal_policy_id, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_CM_LOAD_BALANCING_PRIORITY: + proto_tree_add_item (tree, hf_docsis_vsif_gex_loadbal_priority, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_CM_LOAD_BALANCING_GROUP_ID: + proto_tree_add_item (tree, hf_docsis_vsif_gex_loadbal_group_id, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_CM_RANGING_CLASS_ID_EXTENSION: + proto_tree_add_item (tree, hf_docsis_vsif_gex_ranging_class_id_extension, tvb, pos, length, ENC_BIG_ENDIAN); + break; + case GEX_L2VPN_ENCODING: + proto_tree_add_item (tree, hf_docsis_vsif_gex_l2vpn_encoding, tvb, pos, length, ENC_NA); + break; + case GEX_EXTENDED_CMTS_MIC_CONFIGURATION_SETTING: + dissect_extended_cmts_mic(tvb, tree, pos, length); + break; + case GEX_EXTENDED_SAV: + dissect_sav(tvb, pinfo, tree, pos, length); + break; + case GEX_CABLE_MODEM_ATTRIBUTE_MASKS: + dissect_cable_modem_attribute_masks(tvb, pinfo, tree, pos, length); + break; + case GEX_IP_MULTICAST_JOIN_AUTHORIZATION: + dissect_ip_multicast_join_authorization(tvb, pinfo, tree, pos, length); + break; + case GEX_SERVICE_TYPE_IDENTIFIER: + proto_tree_add_item (tree, hf_docsis_vsif_gex_service_type_identifier, tvb, pos, length, ENC_ASCII); + break; + default: + proto_tree_add_item (tree, hf_docsis_vsif_tlv_unknown, tvb, pos, length, ENC_NA); + } + pos += length; + } +} + + +/* Register the protocol with Wireshark */ +void +proto_register_docsis_vsif (void) +{ + static hf_register_info hf[] = { + {&hf_docsis_vsif_vendorid, + {"Vendor ID", "docsis_vsif.vendorid", + FT_UINT24, BASE_HEX, VALS(vendorid_vals), 0x0, + "Vendor Identifier", HFILL} + }, + {&hf_docsis_vsif_vendor_unknown, + {"VSIF Encodings", "docsis_vsif.unknown", + FT_BYTES, BASE_NONE, NULL, 0x0, + "Unknown Vendor", HFILL} + }, + {&hf_docsis_vsif_cisco_numphones, + {"Number of phone lines", "docsis_vsif.cisco.numphones", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, +#if 0 + {&hf_docsis_vsif_cisco_ipprec, + {"IP Precedence Encodings", "docsis_vsif.cisco.ipprec", + FT_BYTES, BASE_NONE, NULL, 0x0, + NULL, HFILL} + }, +#endif + {&hf_docsis_vsif_cisco_ipprec_val, + {"IP Precedence Value", "docsis_vsif.cisco.ipprec.value", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + {&hf_docsis_vsif_cisco_ipprec_bw, + {"IP Precedence Bandwidth", "docsis_vsif.cisco.ipprec.bw", + FT_UINT8, BASE_DEC, NULL, 0x0, + NULL, HFILL} + }, + {&hf_docsis_vsif_cisco_config_file, + {"IOS Config File", "docsis_vsif.cisco.iosfile", + FT_STRING, BASE_NONE, NULL, 0x0, + NULL, HFILL} + }, + {&hf_docsis_vsif_gex_loadbal_policy_id, + {".1 CM Load Balancing Policy ID", "docsis_vsif.gex.loadbal_policyid", + FT_UINT32, BASE_DEC, NULL, 0x0, + "General Extension Information - CM Load Balancing Policy ID", HFILL} + }, + {&hf_docsis_vsif_gex_loadbal_priority, + {".2 CM Load Balancing Priority", "docsis_vsif.gex.loadbal_priority", + FT_UINT32, BASE_DEC, NULL, 0x0, + "General Extension Information - CM Load Balancing Priority", HFILL} + }, + {&hf_docsis_vsif_gex_loadbal_group_id, + {".3 CM Load Balancing Group ID", "docsis_vsif.gex.loadbal_group_id", + FT_UINT32, BASE_DEC, NULL, 0x0, + "General Extension Information - CM Load Balancing Group ID", HFILL} + }, + {&hf_docsis_vsif_gex_ranging_class_id_extension, + {".4 CM Ranging Class ID Extension", "docsis_vsif.gex.ranging_class_id_extension", + FT_UINT32, BASE_DEC, NULL, 0x0, + "General Extension Information - CM Ranging Class ID Extension", HFILL} + }, + {&hf_docsis_vsif_gex_l2vpn_encoding, + {".5 L2VPN Encoding", "docsis_vsif.gex.l2vpn_encoding", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - L2VPN Encoding", HFILL} + }, + {&hf_docsis_vsif_gex_ecm, + {".6 Extended CMTS MIC Configuration Setting", "docsis_vsif.gex.extended_cmts_mic_configuration_setting", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - Extended CMTS MIC Configuration Setting", HFILL} + }, + {&hf_docsis_vsif_gex_ecm_extended_cmts_mic_hmac_type, + {"..1 Extended CMTS MIC Hmac type", "docsis_vsif.gex.extended_cmts_mic_hmac_type", + FT_UINT8, BASE_DEC, VALS(hmac_vals), 0x0, + "General Extension Information - Extended CMTS MIC Hmac type", HFILL} + }, + {&hf_docsis_vsif_gex_ecm_extended_cmts_mic_bitmap, + {"..2 Extended CMTS MIC Bitmap", "docsis_vsif.gex.extended_cmts_mic_bitmap", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - Extended CMTS MIC Bitmap", HFILL} + }, + {&hf_docsis_vsif_gex_ecm_explicit_extended_cmts_mic_digest_subtype, + {"..3 Explicit Extended CMTS MIC Digest Subtype", "docsis_vsif.gex.extended_cmts_mic_digest_subtype", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - Explicit Extended CMTS MIC Digest Subtype", HFILL} + }, + {&hf_docsis_vsif_gex_sav, + {".7 Source Address Verification (SAV) Authorization Encoding", "docsis_vsif.gex.sav", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - Source Address Verification (SAV) Authorization Encoding", HFILL} + }, + {&hf_docsis_vsif_gex_sav_group_name, + {"..1 SAV Group Name", "docsis_vsif.gex.sav.sav_group_name", + FT_STRING, BASE_NONE, NULL, 0x0, + "General Extension Information - SAV - SAV Group Name", HFILL} + }, + {&hf_docsis_vsif_gex_sav_static_prefix_rule, + {"..2 SAV Static Prefix Rule", "docsis_vsif.gex.sav.static_prefix_rule", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - SAV -Static Prefix Rule", HFILL} + }, + {&hf_docsis_vsif_gex_sav_static_prefix_addressv4, + {"...1 SAV Static Prefix Address", "docsis_vsif.gex.sav.spr.static_prefix_address4", + FT_IPv4, BASE_NONE, NULL, 0x0, + "General Extension Information - SAV -Static Prefix Rule - Static Prefix Address", HFILL} + }, + {&hf_docsis_vsif_gex_sav_static_prefix_addressv6, + {"...1 SAV Static Prefix Address", "docsis_vsif.gex.sav.spr.static_prefix_address6", + FT_IPv6, BASE_NONE, NULL, 0x0, + "General Extension Information - SAV -Static Prefix Rule - Static Prefix Address", HFILL} + }, + {&hf_docsis_vsif_gex_sav_static_prefix_length, + {"...2 SAV Static Prefix Length", "docsis_vsif.gex.sav.spr.static_prefix_length", + FT_UINT8, BASE_DEC, NULL, 0x0, + "General Extension Information - SAV -Static Prefix Rule - Static Prefix Length", HFILL} + }, + {&hf_docsis_vsif_gex_cmam, + {".9 CM Attribute Mask", "docsis_vsif.gex.cmam", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - CM Attribute Mask", HFILL} + }, + {&hf_docsis_vsif_gex_cmam_cm_required_downstream_attribute_mask, + {"..1 CM Required Downstream Attribute", "docsis_vsif.gex.cmam.cm_required_downstream_attribute", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - CM Attribute Mask - CM Required Downstream Attribute", HFILL} + }, + {&hf_docsis_vsif_gex_cmam_cm_forbidden_downstream_attribute_mask, + {"..2 CM Forbidden Downstream Attribute", "docsis_vsif.gex.cmam.cm_forbidden_downstream_attribute", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - CM Attribute Mask - CM Forbidden Downstream Attribute", HFILL} + }, + {&hf_docsis_vsif_gex_cmam_cm_required_upstream_attribute_mask, + {"..3 CM Required Upstream Attribute", "docsis_vsif.gex.cmam.cm_required_upstream_attribute", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - CM Attribute Mask - CM Required Upstream Attribute", HFILL} + }, + {&hf_docsis_vsif_gex_cmam_cm_forbidden_upstream_attribute_mask, + {"..4 CM Forbidden Upstream Attribute", "docsis_vsif.gex.cmam.cm_forbidden_upstream_attribute", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - CM Attribute Mask - CM Forbidden Upstream Attribute", HFILL} + }, + {&hf_docsis_vsif_gex_imja, + {".10 IP Multicast Join Authorization", "docsis_vsif.gex.imja", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ip_multicast_profile_name, + {"..1 IP Multicast Profile Name", "docsis_vsif.gex.imja.ip_multicast_profile_name", + FT_STRING, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Name", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr, + {"..2 IP Multicast Profile Join Authorization Static Session Rule", "docsis_vsif.gex.imja.ip_multicast_join_authorization_static_session_rule", + FT_BYTES, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_rule_priority, + {"...1 Rule Priority", "docsis_vsif.gex.imja.imja_ssr_rule_priority", + FT_UINT8, BASE_DEC, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Rule Priority", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_authorization_action, + {"...2 Authorization Action", "docsis_vsif.gex.imja.imja_ssr_authorization_action", + FT_UINT8, BASE_DEC, VALS(authorization_action_vals), 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Rule Priority", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv4, + {"...3 Source Prefix Address", "docsis_vsif.gex.imja.imja_ssr_source_prefix_address4", + FT_IPv4, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Source Prefix Address", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_source_prefix_addressv6, + {"...3 Source Prefix Address", "docsis_vsif.gex.imja.imja_ssr_source_prefix_address6", + FT_IPv6, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Source Prefix Address", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_source_prefix_length, + {"...4 Source Prefix Length", "docsis_vsif.gex.imja.imja_ssr_source_prefix_length", + FT_UINT8, BASE_DEC, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Source Prefix Length", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv4, + {"...5 Group Prefix Address", "docsis_vsif.gex.imja.imja_ssr_group_prefix_address4", + FT_IPv4, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Group Prefix Address", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_group_prefix_addressv6, + {"...5 Group Prefix Address", "docsis_vsif.gex.imja.imja_ssr_group_prefix_address6", + FT_IPv6, BASE_NONE, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Group Prefix Address", HFILL} + }, + {&hf_docsis_vsif_gex_imja_ssr_group_prefix_length, + {"...6 Group Prefix Length", "docsis_vsif.gex.imja.imja_ssr_group_prefix_length", + FT_UINT8, BASE_DEC, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - IP Multicast Profile Join Authorization Static Session Rule - Group Prefix Length", HFILL} + }, + {&hf_docsis_vsif_gex_imja_maximum_multicast_sessions, + {"..3 Maximum Multicast Sessions", "docsis_vsif.gex.imja.imja_maximum_multicast_sessions", + FT_UINT16, BASE_DEC, NULL, 0x0, + "General Extension Information - IP Multicast Join Authorization - Maximum Multicast Sessions", HFILL} + }, + {&hf_docsis_vsif_gex_service_type_identifier, + {".11 Service Type Identifier", "docsis_vsif.gex.service_type_identifier", + FT_STRING, BASE_NONE, NULL, 0x0, + "General Extension Information - Service Type Identifier", HFILL} + }, + {&hf_docsis_vsif_tlv_unknown, + {"Unknown VSIF TLV", "docsis_vsif.unknown", + FT_BYTES, BASE_NONE, NULL, 0x0, + NULL, HFILL} + }, + }; + + static gint *ett[] = { + &ett_docsis_vsif, + &ett_docsis_vsif_ipprec, + &ett_docsis_vsif_gex_ecm, + &ett_docsis_vsif_gex_sav, + &ett_docsis_vsif_gex_sav_spr, + &ett_docsis_vsif_gex_cmam, + &ett_docsis_vsif_gex_imja, + &ett_docsis_vsif_gex_imja_ssr + }; + + expert_module_t* expert_docsis_vsif; + + static ei_register_info ei[] = { + {&ei_docsis_vsif_tlvlen_bad, { "docsis_vsif.tlvlenbad", PI_MALFORMED, PI_ERROR, "Bad TLV length", EXPFILL}}, + {&ei_docsis_vsif_tlvtype_unknown, { "docsis_vsif.tlvtypeunknown", PI_PROTOCOL, PI_WARN, "Unknown TLV type", EXPFILL}}, + }; + + proto_docsis_vsif = + proto_register_protocol ("DOCSIS Vendor Specific Encodings", + "DOCSIS VSIF", "docsis_vsif"); + + proto_register_field_array (proto_docsis_vsif, hf, array_length (hf)); + proto_register_subtree_array (ett, array_length (ett)); + expert_docsis_vsif = expert_register_protocol(proto_docsis_vsif); + expert_register_field_array(expert_docsis_vsif, ei, array_length(ei)); + + register_dissector ("docsis_vsif", dissect_vsif, proto_docsis_vsif); +} + +void +proto_reg_handoff_docsis_vsif (void) +{ +#if 0 + dissector_handle_t docsis_vsif_handle; + + docsis_vsif_handle = find_dissector ("docsis_vsif"); + dissector_add_uint ("docsis", 0xFD, docsis_vsif_handle); +#endif +} + +/* + * Editor modelines - https://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: + */ |