/* packet-isis-lsp.c * Routines for decoding isis lsp packets and their CLVs * * $Id: packet-isis-lsp.c,v 1.46 2003/12/08 20:40:33 guy Exp $ * Stuart Stanley * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include "epan/ipv4.h" #include #include "packet-osi.h" #include "packet-ipv6.h" #include "packet-isis.h" #include "packet-isis-clv.h" #include "packet-isis-lsp.h" #include /* lsp packets */ static int hf_isis_lsp_pdu_length = -1; static int hf_isis_lsp_remaining_life = -1; static int hf_isis_lsp_sequence_number = -1; static int hf_isis_lsp_checksum = -1; static int hf_isis_lsp_checksum_bad = -1; static int hf_isis_lsp_clv_ipv4_int_addr = -1; static int hf_isis_lsp_clv_ipv6_int_addr = -1; static int hf_isis_lsp_clv_te_router_id = -1; static int hf_isis_lsp_clv_mt = -1; static int hf_isis_lsp_p = -1; static int hf_isis_lsp_att = -1; static int hf_isis_lsp_hippity = -1; static int hf_isis_lsp_is_type = -1; static gint ett_isis_lsp = -1; static gint ett_isis_lsp_info = -1; static gint ett_isis_lsp_att = -1; static gint ett_isis_lsp_clv_area_addr = -1; static gint ett_isis_lsp_clv_is_neighbors = -1; static gint ett_isis_lsp_clv_ext_is_reachability = -1; /* CLV 22 */ static gint ett_isis_lsp_part_of_clv_ext_is_reachability = -1; static gint ett_isis_lsp_subclv_admin_group = -1; static gint ett_isis_lsp_subclv_unrsv_bw = -1; static gint ett_isis_lsp_clv_unknown = -1; static gint ett_isis_lsp_clv_partition_dis = -1; static gint ett_isis_lsp_clv_prefix_neighbors = -1; static gint ett_isis_lsp_clv_nlpid = -1; static gint ett_isis_lsp_clv_hostname = -1; static gint ett_isis_lsp_clv_te_router_id = -1; static gint ett_isis_lsp_clv_authentication = -1; static gint ett_isis_lsp_clv_ip_authentication = -1; static gint ett_isis_lsp_clv_ipv4_int_addr = -1; static gint ett_isis_lsp_clv_ipv6_int_addr = -1; /* CLV 232 */ static gint ett_isis_lsp_clv_ip_reachability = -1; static gint ett_isis_lsp_clv_ip_reach_subclv = -1; static gint ett_isis_lsp_clv_ext_ip_reachability = -1; /* CLV 135 */ static gint ett_isis_lsp_part_of_clv_ext_ip_reachability = -1; static gint ett_isis_lsp_clv_ipv6_reachability = -1; /* CLV 236 */ static gint ett_isis_lsp_part_of_clv_ipv6_reachability = -1; static gint ett_isis_lsp_clv_mt = -1; static gint ett_isis_lsp_clv_mt_is = -1; static gint ett_isis_lsp_part_of_clv_mt_is = -1; static gint ett_isis_lsp_clv_mt_reachable_IPv4_prefx = -1; /* CLV 235 */ static gint ett_isis_lsp_clv_mt_reachable_IPv6_prefx = -1; /* CLV 237 */ static const value_string isis_lsp_istype_vals[] = { { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, { ISIS_LSP_TYPE_LEVEL_1, "Level 1"}, { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, { ISIS_LSP_TYPE_LEVEL_2, "Level 2"}, { 0, NULL } }; static const true_false_string supported_string = { "Supported", "Unsupported" }; static const true_false_string hippity_string = { "Set", "Unset" }; /* * Predclare dissectors for use in clv dissection. */ static void dissect_lsp_prefix_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_partition_dis_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_mt_is_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ext_is_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_l2_is_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_l1_es_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_l1_is_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_area_address_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ip_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ipv6_int_addr_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ip_int_addr_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_te_router_id_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_hostname_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_mt_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_nlpid_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ipv6_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ext_ip_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_ip_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_ipreach_subclv(tvbuff_t *tvb, proto_tree *tree, int offset, int clv_code, int clv_len); static void dissect_lsp_mt_reachable_IPv4_prefx_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static void dissect_lsp_mt_reachable_IPv6_prefx_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length); static const isis_clv_handle_t clv_l1_lsp_opts[] = { { ISIS_CLV_AREA_ADDRESS, "Area address(es)", &ett_isis_lsp_clv_area_addr, dissect_lsp_area_address_clv }, { ISIS_CLV_IS_REACH, "IS Reachability", &ett_isis_lsp_clv_is_neighbors, dissect_lsp_l1_is_neighbors_clv }, { ISIS_CLV_ES_NEIGHBORS, "ES Neighbor(s)", &ett_isis_lsp_clv_is_neighbors, dissect_lsp_l1_es_neighbors_clv }, { ISIS_CLV_EXTD_IS_REACH, "Extended IS reachability", &ett_isis_lsp_clv_ext_is_reachability, dissect_lsp_ext_is_reachability_clv }, { ISIS_CLV_INT_IP_REACH, "IP Internal reachability", &ett_isis_lsp_clv_ip_reachability, dissect_lsp_ip_reachability_clv }, { ISIS_CLV_EXT_IP_REACH, "IP External reachability", &ett_isis_lsp_clv_ip_reachability, dissect_lsp_ip_reachability_clv }, { ISIS_CLV_EXTD_IP_REACH, "Extended IP Reachability", &ett_isis_lsp_clv_ext_ip_reachability, dissect_lsp_ext_ip_reachability_clv }, { ISIS_CLV_IP6_REACH, "IPv6 reachability", &ett_isis_lsp_clv_ipv6_reachability, dissect_lsp_ipv6_reachability_clv }, { ISIS_CLV_PROTOCOLS_SUPPORTED, "Protocols supported", &ett_isis_lsp_clv_nlpid, dissect_lsp_nlpid_clv }, { ISIS_CLV_HOSTNAME, "Hostname", &ett_isis_lsp_clv_hostname, dissect_lsp_hostname_clv }, { ISIS_CLV_TE_ROUTER_ID, "Traffic Engineering Router ID", &ett_isis_lsp_clv_te_router_id, dissect_lsp_te_router_id_clv }, { ISIS_CLV_IP_ADDR, "IP Interface address(es)", &ett_isis_lsp_clv_ipv4_int_addr, dissect_lsp_ip_int_addr_clv }, { ISIS_CLV_IP6_ADDR, "IPv6 Interface address(es)", &ett_isis_lsp_clv_ipv6_int_addr, dissect_lsp_ipv6_int_addr_clv }, { ISIS_CLV_AUTHENTICATION, "Authentication", &ett_isis_lsp_clv_authentication, dissect_lsp_authentication_clv }, { ISIS_CLV_IP_AUTHENTICATION, "IP Authentication", &ett_isis_lsp_clv_ip_authentication, dissect_lsp_ip_authentication_clv }, { ISIS_CLV_MT_SUPPORTED, "Multi Topology supported", &ett_isis_lsp_clv_mt, dissect_lsp_mt_clv }, { ISIS_CLV_MT_IS_REACH, "Multi Topology IS Reachability", &ett_isis_lsp_clv_mt_is, dissect_lsp_mt_is_reachability_clv }, { ISIS_CLV_MT_IP_REACH, "Multi Topology Reachable IPv4 Prefixes", &ett_isis_lsp_clv_mt_reachable_IPv4_prefx, dissect_lsp_mt_reachable_IPv4_prefx_clv }, { ISIS_CLV_MT_IP6_REACH, "Multi Topology Reachable IPv6 Prefixes", &ett_isis_lsp_clv_mt_reachable_IPv6_prefx, dissect_lsp_mt_reachable_IPv6_prefx_clv }, { 0, "", NULL, NULL } }; static const isis_clv_handle_t clv_l2_lsp_opts[] = { { ISIS_CLV_AREA_ADDRESS, "Area address(es)", &ett_isis_lsp_clv_area_addr, dissect_lsp_area_address_clv }, { ISIS_CLV_IS_REACH, "IS Reachability", &ett_isis_lsp_clv_is_neighbors, dissect_lsp_l2_is_neighbors_clv }, { ISIS_CLV_EXTD_IS_REACH, "Extended IS reachability", &ett_isis_lsp_clv_ext_is_reachability, dissect_lsp_ext_is_reachability_clv }, { ISIS_CLV_PARTITION_DIS, "Parition Designated Level 2 IS", &ett_isis_lsp_clv_partition_dis, dissect_lsp_partition_dis_clv }, { ISIS_CLV_PREFIX_NEIGHBORS, "Prefix neighbors", &ett_isis_lsp_clv_prefix_neighbors, dissect_lsp_prefix_neighbors_clv }, { ISIS_CLV_INT_IP_REACH, "IP Internal reachability", &ett_isis_lsp_clv_ip_reachability, dissect_lsp_ip_reachability_clv }, { ISIS_CLV_EXT_IP_REACH, "IP External reachability", &ett_isis_lsp_clv_ip_reachability, dissect_lsp_ip_reachability_clv }, { ISIS_CLV_PROTOCOLS_SUPPORTED, "Protocols supported", &ett_isis_lsp_clv_nlpid, dissect_lsp_nlpid_clv }, { ISIS_CLV_HOSTNAME, "Hostname", &ett_isis_lsp_clv_hostname, dissect_lsp_hostname_clv }, { ISIS_CLV_TE_ROUTER_ID, "Traffic Engineering Router ID", &ett_isis_lsp_clv_te_router_id, dissect_lsp_te_router_id_clv }, { ISIS_CLV_EXTD_IP_REACH, "Extended IP Reachability", &ett_isis_lsp_clv_ext_ip_reachability, dissect_lsp_ext_ip_reachability_clv }, { ISIS_CLV_IP6_REACH, "IPv6 reachability", &ett_isis_lsp_clv_ipv6_reachability, dissect_lsp_ipv6_reachability_clv }, { ISIS_CLV_IP_ADDR, "IP Interface address(es)", &ett_isis_lsp_clv_ipv4_int_addr, dissect_lsp_ip_int_addr_clv }, { ISIS_CLV_IP6_ADDR, "IPv6 Interface address(es)", &ett_isis_lsp_clv_ipv6_int_addr, dissect_lsp_ipv6_int_addr_clv }, { ISIS_CLV_AUTHENTICATION, "Authentication", &ett_isis_lsp_clv_authentication, dissect_lsp_authentication_clv }, { ISIS_CLV_IP_AUTHENTICATION, "IP Authentication", &ett_isis_lsp_clv_ip_authentication, dissect_lsp_ip_authentication_clv }, { ISIS_CLV_MT_SUPPORTED, "Multi Topology", &ett_isis_lsp_clv_mt, dissect_lsp_mt_clv }, { ISIS_CLV_MT_IS_REACH, "Multi Topology IS Reachability", &ett_isis_lsp_clv_mt_is, dissect_lsp_mt_is_reachability_clv }, { ISIS_CLV_MT_IP_REACH, "Multi Topology Reachable IPv4 Prefixes", &ett_isis_lsp_clv_mt_reachable_IPv4_prefx, dissect_lsp_mt_reachable_IPv4_prefx_clv }, { ISIS_CLV_MT_IP6_REACH, "Multi Topology Reachable IPv6 Prefixes", &ett_isis_lsp_clv_mt_reachable_IPv6_prefx, dissect_lsp_mt_reachable_IPv6_prefx_clv }, { 0, "", NULL, NULL } }; /* * Name: dissect_lsp_mt_id() * * Description: * dissect and display the multi-topology ID value * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. CAN'T BE NULL * int : offset into packet data where we are. * * Output: * void, but we will add to proto tree. */ static void dissect_lsp_mt_id(tvbuff_t *tvb, proto_tree *tree, int offset) { int mt_block, mt_id; char mt_desc[60]; /* fetch two bytes */ mt_block = tvb_get_ntohs(tvb, offset); proto_tree_add_text ( tree, tvb, offset, 1 , "4 most significant bits reserved, should be set to 0 (%d)", ISIS_LSP_MT_MSHIP_RES(mt_block)); mt_id = ISIS_LSP_MT_MSHIP_ID(mt_block); /*mask out the lower 12 bits */ switch(mt_id) { case 0: strcpy(mt_desc,"'standard' topology"); break; case 1: strcpy(mt_desc,"IPv4 In-Band Management purposes"); break; case 2: strcpy(mt_desc,"IPv6 routing topology"); break; case 3: strcpy(mt_desc,"IPv4 multicast routing topology"); break; case 4: strcpy(mt_desc,"IPv6 multicast routing topology"); break; default: strcpy(mt_desc,((mt_block & 0x0fff) < 3996) ? "Reserved for IETF Consensus" : "Development, Experimental and Proprietary features"); } proto_tree_add_text ( tree, tvb, offset, 2 , "%s (%d)", mt_desc, mt_id); } /* * Name: dissect_metric() * * Description: * Display a metric prefix portion. ISIS has the concept of multple * metric per prefix (default, delay, expense, and error). This * routine assists other dissectors by adding a single one of * these to the display tree.. * * The 8th(msbit) bit in the metric octet is the "supported" bit. The * "default" support is required, so we support a "force_supported" * flag that tells us that it MUST be zero (zero==supported, * so it really should be a "not supported" in the boolean sense) * and to display a protocol failure accordingly. Notably, * Cisco IOS 12(6) blows this! * The 7th bit must be zero (reserved). * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * guint8 : value of the metric. * char * : string giving type of the metric. * int : force supported. True is the supported bit MUST be zero. * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_metric(tvbuff_t *tvb, proto_tree *tree, int offset, guint8 value, char *pstr, int force_supported ) { int s; if ( !tree ) return; s = ISIS_LSP_CLV_METRIC_SUPPORTED(value); proto_tree_add_text(tree, tvb, offset, 1, "%s Metric: %s%s %s%d:%d", pstr, s ? "Not supported" : "Supported", (s && force_supported) ? "(but is required to be)":"", ISIS_LSP_CLV_METRIC_RESERVED(value) ? "(reserved bit != 0)":"", ISIS_LSP_CLV_METRIC_VALUE(value), value ); } /* * Name: dissect_lsp_ip_reachability_clv() * * Description: * Decode an IP reachability CLV. This can be either internal or * external (the clv format does not change and which type we are * displaying is put there by the dispatcher). All of these * are a metric block followed by an IP addr and mask. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_ip_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { proto_item *ti; proto_tree *ntree = NULL; guint32 src, mask, prefix_len; guint32 bitmasks[33] = { 0x00000000, 0x00000008, 0x0000000c, 0x0000000e, 0x0000000f, 0x000000f8, 0x000000fc, 0x000000fe, 0x000000ff, 0x000008ff, 0x00000cff, 0x00000eff, 0x00000fff, 0x0000f8ff, 0x0000fcff, 0x0000feff, 0x0000ffff, 0x0008ffff, 0x000cffff, 0x000effff, 0x000fffff, 0x00f8ffff, 0x00fcffff, 0x00feffff, 0x00ffffff, 0x08ffffff, 0x0cffffff, 0x0effffff, 0x0fffffff, 0xf8ffffff, 0xfcffffff, 0xfeffffff, 0xffffffff }; while ( length > 0 ) { if (length<12) { isis_dissect_unknown(tvb, tree, offset, "short IP reachability (%d vs 12)", length ); return; } /* * Gotta build a sub-tree for all our pieces */ if ( tree ) { tvb_memcpy(tvb, (guint8 *)&src, offset+4, 4); tvb_memcpy(tvb, (guint8 *)&mask, offset+8, 4); /* find out if the mask matches one of 33 possible prefix lengths */ prefix_len=0; while(prefix_len<=33) { if (bitmasks[prefix_len++]==mask) { prefix_len--; break; } } /* 34 indicates no match -> must be a discontiguous netmask lets dump the mask, otherwise print the prefix_len */ if(prefix_len==34) { ti = proto_tree_add_text ( tree, tvb, offset, 12, "IPv4 prefix: %s mask %s", ip_to_str((guint8*)&src), ip_to_str((guint8*)&mask)); } else { ti = proto_tree_add_text ( tree, tvb, offset, 12, "IPv4 prefix: %s/%d", ip_to_str((guint8*)&src), prefix_len ); }; ntree = proto_item_add_subtree(ti, ett_isis_lsp_clv_ip_reachability); proto_tree_add_text (ntree, tvb, offset, 1, "Default Metric: %d, %s, Distribution: %s", ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset)), ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset)) ? "External" : "Internal", ISIS_LSP_CLV_METRIC_UPDOWN(tvb_get_guint8(tvb, offset)) ? "down" : "up"); if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+1))) { proto_tree_add_text (ntree, tvb, offset+1, 1, "Delay Metric: Not supported"); } else { proto_tree_add_text (ntree, tvb, offset+1, 1, "Delay Metric: %d, %s", ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+1)), ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+1)) ? "External" : "Internal"); } if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+2))) { proto_tree_add_text (ntree, tvb, offset+2, 1, "Expense Metric: Not supported"); } else { proto_tree_add_text (ntree, tvb, offset+2, 1, "Exense Metric: %d, %s", ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+2)), ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+2)) ? "External" : "Internal"); } if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+3))) { proto_tree_add_text (ntree, tvb, offset+3, 1, "Error Metric: Not supported"); } else { proto_tree_add_text (ntree, tvb, offset+3, 1, "Error Metric: %d, %s", ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+3)), ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+3)) ? "External" : "Internal"); } } offset += 12; length -= 12; } } /* * Name: dissect_ipreach_subclv () * * Description: parses IP reach subTLVs * Called by various IP Reachability dissectors. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. * int : offset into packet data where we are (beginning of the sub_clv value). * * Output: * void */ static void dissect_ipreach_subclv(tvbuff_t *tvb, proto_tree *tree, int offset, int clv_code, int clv_len) { switch (clv_code) { case 1: while (clv_len >= 4) { proto_tree_add_text(tree, tvb, offset, 4, "32-Bit Administrative tag: 0x%08x (=%u)", tvb_get_ntohl(tvb, offset), tvb_get_ntohl(tvb, offset)); offset+=4; clv_len-=4; } break; case 2: while (clv_len >= 8) { proto_tree_add_text(tree, tvb, offset, 8, "64-Bit Administrative tag: 0x%08x%08x", tvb_get_ntohl(tvb, offset), tvb_get_ntohl(tvb, offset+4)); offset+=8; clv_len-=8; } break; default : proto_tree_add_text (tree, tvb, offset, clv_len+2, "Unknown sub-TLV: code %u, length %u", clv_code, clv_len ); break; } } /* * Name: dissect_lsp_ext_ip_reachability_clv() * * Description: Decode an Extended IP Reachability CLV - code 135. * * The extended IP reachability TLV is an extended version * of the IP reachability TLVs (codes 128 and 130). It encodes * the metric as a 32-bit unsigned interger and allows to add * sub-CLV(s). * * CALLED BY TLV 235 DISSECTOR * * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_ext_ip_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { proto_item *pi = NULL; proto_tree *subtree = NULL; proto_tree *subtree2 = NULL; guint8 ctrl_info; guint8 bit_length, byte_length; guint8 prefix [4]; guint32 metric; guint8 len,i; guint8 subclvs_len; guint8 clv_code, clv_len; if (!tree) return; while (length > 0) { memset (prefix, 0, 4); ctrl_info = tvb_get_guint8(tvb, offset+4); bit_length = ctrl_info & 0x3f; byte_length = (bit_length + 7) / 8; if (byte_length > sizeof(prefix)) { isis_dissect_unknown(tvb, tree, offset, "IPv4 prefix has an invalid length: %d bytes", byte_length ); return; } tvb_memcpy (tvb, prefix, offset+5, byte_length); metric = tvb_get_ntohl(tvb, offset); subclvs_len = 0; if ((ctrl_info & 0x40) != 0) subclvs_len = 1+tvb_get_guint8(tvb, offset+5+byte_length); pi = proto_tree_add_text (tree, tvb, offset, 5+byte_length+subclvs_len, "IPv4 prefix: %s/%d, Metric: %u, Distribution: %s, %ssub-TLVs present", ip_to_str (prefix), bit_length, metric, ((ctrl_info & 0x80) == 0) ? "up" : "down", ((ctrl_info & 0x40) == 0) ? "no " : "" ); /* open up a new tree per prefix */ subtree = proto_item_add_subtree (pi, ett_isis_lsp_part_of_clv_ext_ip_reachability); proto_tree_add_text (subtree, tvb, offset+5, byte_length, "IPv4 prefix: %s/%u", ip_to_str (prefix), bit_length); proto_tree_add_text (subtree, tvb, offset, 4, "Metric: %u", metric); proto_tree_add_text (subtree, tvb, offset+4, 1, "Distribution: %s", ((ctrl_info & 0x80) == 0) ? "up" : "down"); len = 5 + byte_length; if ((ctrl_info & 0x40) != 0) { subclvs_len = tvb_get_guint8(tvb, offset+len); pi = proto_tree_add_text (subtree, tvb, offset+len, 1, "sub-TLVs present, total length: %u bytes", subclvs_len); proto_item_set_len (pi, subclvs_len+1); /* open up a new tree for the subTLVs */ subtree2 = proto_item_add_subtree (pi, ett_isis_lsp_clv_ip_reach_subclv); i =0; while (i < subclvs_len) { clv_code = tvb_get_guint8(tvb, offset+len+1); /* skip the total subtlv len indicator */ clv_len = tvb_get_guint8(tvb, offset+len+2); /* * we pass on now the raw data to the ipreach_subtlv dissector * therefore we need to skip 3 bytes * (total subtlv len, subtlv type, subtlv len) */ dissect_ipreach_subclv(tvb, subtree2, offset+len+3, clv_code, clv_len); i += clv_len + 2; } len += 1 + subclvs_len; } else { proto_tree_add_text (subtree, tvb, offset+4, 1, "no sub-TLVs present"); proto_item_set_len (pi, len); } offset += len; length -= len; } } /* * Name: dissect_lsp_ipv6_reachability_clv() * * Description: Decode an IPv6 reachability CLV - code 236. * * CALLED BY TLV 237 DISSECTOR * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_ipv6_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { proto_item *pi; proto_tree *subtree = NULL; proto_tree *subtree2 = NULL; guint8 ctrl_info; guint8 bit_length, byte_length; struct e_in6_addr prefix; guint32 metric; guint8 len,i; guint8 subclvs_len; guint8 clv_code, clv_len; if (!tree) return; while (length > 0) { memset (prefix.s6_addr, 0, 16); ctrl_info = tvb_get_guint8(tvb, offset+4); bit_length = tvb_get_guint8(tvb, offset+5); byte_length = (bit_length + 7) / 8; if (byte_length > sizeof(prefix)) { isis_dissect_unknown(tvb, tree, offset, "IPv6 prefix has an invalid length: %d bytes", byte_length ); return; } tvb_memcpy (tvb, prefix.s6_addr, offset+6, byte_length); metric = tvb_get_ntohl(tvb, offset); subclvs_len = 0; if ((ctrl_info & 0x20) != 0) subclvs_len = 1+tvb_get_guint8(tvb, offset+6+byte_length); pi = proto_tree_add_text (tree, tvb, offset, 6+byte_length+subclvs_len, "IPv6 prefix: %s/%u, Metric: %u, Distribution: %s, %s, %ssub-TLVs present", ip6_to_str (&prefix), bit_length, metric, ((ctrl_info & 0x80) == 0) ? "up" : "down", ((ctrl_info & 0x40) == 0) ? "internal" : "external", ((ctrl_info & 0x20) == 0) ? "no " : "" ); subtree = proto_item_add_subtree (pi, ett_isis_lsp_part_of_clv_ipv6_reachability); proto_tree_add_text (subtree, tvb, offset+6, byte_length, "IPv6 prefix: %s/%u", ip6_to_str (&prefix), bit_length); proto_tree_add_text (subtree, tvb, offset, 4, "Metric: %u", metric); proto_tree_add_text (subtree, tvb, offset+4, 1, "Distribution: %s, %s", ((ctrl_info & 0x80) == 0) ? "up" : "down", ((ctrl_info & 0x40) == 0) ? "internal" : "external" ); if ((ctrl_info & 0x1f) != 0) { proto_tree_add_text (subtree, tvb, offset+4, 1, "Reserved bits: 0x%x", (ctrl_info & 0x1f) ); } len = 6 + byte_length; if ((ctrl_info & 0x20) != 0) { subclvs_len = tvb_get_guint8(tvb, offset+len); pi = proto_tree_add_text (subtree, tvb, offset+len, 1, "sub-TLVs present, total length: %u bytes", subclvs_len); proto_item_set_len (pi, subclvs_len+1); /* open up a new tree for the subTLVs */ subtree2 = proto_item_add_subtree (pi, ett_isis_lsp_clv_ip_reach_subclv); i =0; while (i < subclvs_len) { clv_code = tvb_get_guint8(tvb, offset+len+1); /* skip the total subtlv len indicator */ clv_len = tvb_get_guint8(tvb, offset+len+2); dissect_ipreach_subclv(tvb, subtree2, offset+len+3, clv_code, clv_len); i += clv_len + 2; } len += 1 + subclvs_len; } else { proto_tree_add_text (subtree, tvb, offset+4, 1, "no sub-TLVs present"); proto_item_set_len (pi, len); } offset += len; length -= len; } } /* * Name: dissect_lsp_nlpid_clv() * * Description: * Decode for a lsp packets NLPID clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_nlpid_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_nlpid_clv(tvb, tree, offset, length); } /* * Name: dissect_lsp_mt_clv() * * Description: - code 229 * Decode for a lsp packets Multi Topology clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * guint : length of this clv * int : length of IDs in packet. * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_mt_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_mt_clv(tvb, tree, offset, length, hf_isis_lsp_clv_mt ); } /* * Name: dissect_lsp_hostname_clv() * * Description: * Decode for a lsp packets hostname clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_hostname_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_hostname_clv(tvb, tree, offset, length); } /* * Name: dissect_lsp_te_router_id_clv() * * Description: * Decode for a lsp packets Traffic Engineering ID clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_te_router_id_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_te_router_id_clv(tvb, tree, offset, length, hf_isis_lsp_clv_te_router_id ); } /* * Name: dissect_lsp_ip_int_addr_clv() * * Description: * Decode for a lsp packets ip interface addr clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_ip_int_addr_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_ip_int_clv(tvb, tree, offset, length, hf_isis_lsp_clv_ipv4_int_addr ); } /* * Name: dissect_lsp_ipv6_int_addr_clv() * * Description: Decode an IPv6 interface addr CLV - code 232. * * Calls into the clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_ipv6_int_addr_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_ipv6_int_clv(tvb, tree, offset, length, hf_isis_lsp_clv_ipv6_int_addr ); } /* * Name: dissect_lsp_authentication_clv() * * Description: * Decode for a lsp packets authenticaion clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_authentication_clv(tvb, tree, offset, length); } /* * Name: dissect_lsp_ip_authentication_clv() * * Description: * Decode for a lsp packets authenticaion clv. Calls into the * clv common one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : proto tree to build on (may be null) * int : current offset into packet data * int : length of IDs in packet. * int : length of this clv * * Output: * void, will modify proto_tree if not null. */ static void dissect_lsp_ip_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_ip_authentication_clv(tvb, tree, offset, length); } /* * Name: dissect_lsp_area_address_clv() * * Description: * Decode for a lsp packet's area address clv. Call into clv common * one. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : length of IDs in packet. * int : length of clv we are decoding * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_area_address_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { isis_dissect_area_address_clv(tvb, tree, offset, length); } /* * Name: dissect_lsp_eis_neighbors_clv_inner() * * Description: * Real work horse for showing neighbors. This means we decode the * first octet as either virtual/!virtual (if show_virtual param is * set), or as a must == 0 reserved value. * * Once past that, we decode n neighbor elements. Each neighbor * is comprised of a metric block (is dissect_metric) and the * addresses. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : length of IDs in packet. * int : length of clv we are decoding * int : set to decode first octet as virtual vs reserved == 0 * int : set to indicate EIS instead of IS (6 octet per addr instead of 7) * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_eis_neighbors_clv_inner(tvbuff_t *tvb, proto_tree *tree, int offset, int length, int id_length, int show_virtual, int is_eis) { proto_item *ti; proto_tree *ntree = NULL; int tlen; if (!is_eis) { id_length++; /* IDs are one octet longer in IS neighbours */ if ( tree ) { if ( show_virtual ) { /* virtual path flag */ proto_tree_add_text ( tree, tvb, offset, 1, tvb_get_guint8(tvb, offset) ? "IsVirtual" : "IsNotVirtual" ); } else { proto_tree_add_text ( tree, tvb, offset, 1, "Reserved value 0x%02x, must == 0", tvb_get_guint8(tvb, offset) ); } } offset++; length--; } tlen = 4 + id_length; while ( length > 0 ) { if (length 0) { ti = proto_tree_add_text (tree, tvb, offset, -1, "IS neighbor: %s", print_system_id (tvb_get_ptr(tvb, offset, 7), 7) ); ntree = proto_item_add_subtree (ti, ett_isis_lsp_part_of_clv_ext_is_reachability ); proto_tree_add_text (ntree, tvb, offset+7, 3, "Metric: %d", tvb_get_ntoh24(tvb, offset+7) ); subclvs_len = tvb_get_guint8(tvb, offset+10); if (subclvs_len == 0) { proto_tree_add_text (ntree, tvb, offset+10, 1, "no sub-TLVs present"); } else { i = 0; while (i < subclvs_len) { clv_code = tvb_get_guint8(tvb, offset+11+i); clv_len = tvb_get_guint8(tvb, offset+12+i); switch (clv_code) { case 3 : dissect_subclv_admin_group(tvb, ntree, offset+13+i); break; case 6 : proto_tree_add_text (ntree, tvb, offset+11+i, 6, "IPv4 interface address: %s", ip_to_str (tvb_get_ptr(tvb, offset+13+i, 4)) ); break; case 8 : proto_tree_add_text (ntree, tvb, offset+11+i, 6, "IPv4 neighbor address: %s", ip_to_str (tvb_get_ptr(tvb, offset+13+i, 4)) ); break; case 9 : dissect_subclv_max_bw (tvb, ntree, offset+13+i); break; case 10: dissect_subclv_rsv_bw (tvb, ntree, offset+13+i); break; case 11: dissect_subclv_unrsv_bw (tvb, ntree, offset+13+i); break; case 18: proto_tree_add_text (ntree, tvb, offset+11+i, 5, "Traffic engineering default metric: %d", tvb_get_ntoh24(tvb, offset+13+i) ); break; case 250: case 251: case 252: case 253: case 254: proto_tree_add_text (ntree, tvb, offset+11+i, clv_len+2, "Unknown Cisco specific extensions: code %d, length %d", clv_code, clv_len ); break; default : proto_tree_add_text (ntree, tvb, offset+11+i, clv_len+2, "Unknown sub-CLV: code %d, length %d", clv_code, clv_len ); break; } i += clv_len + 2; } } len = 11 + subclvs_len; proto_item_set_len (ti, len); offset += len; length -= len; } } /* * Name: dissect_lsp_mt_reachable_IPv4_prefx_clv() * * Description: Decode Multi-Topology IPv4 Prefixes - code 235 * * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : length of IDs in packet. * int : length of clv we are decoding * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_mt_reachable_IPv4_prefx_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { if (!tree) return; if (length < 2) { isis_dissect_unknown(tvb, tree, offset, "short lsp multi-topology reachable IPv4 prefixes(%d vs %d)", length, 2 ); return; } dissect_lsp_mt_id(tvb, tree, offset); dissect_lsp_ext_ip_reachability_clv(tvb, tree, offset+2, 0, length-2); } /* * Name: dissect_lsp_mt_reachable_IPv6_prefx_clv() * * Description: Decode Multi-Topology IPv6 Prefixes - code 237 * * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : length of IDs in packet. * int : length of clv we are decoding * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_mt_reachable_IPv6_prefx_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { if (!tree) return; if (length < 2) { isis_dissect_unknown(tvb, tree, offset, "short lsp multi-topology reachable IPv6 prefixes(%d vs %d)", length, 2 ); return; } dissect_lsp_mt_id(tvb, tree, offset); dissect_lsp_ipv6_reachability_clv(tvb, tree, offset+2, 0, length-2); } /* * Name: dissect_lsp_mt_is_reachability_clv() * * Description: Decode Multi-Topology Intermediate Systems - code 222 * * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : unused * int : length of clv we are decoding * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_mt_is_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { if (!tree) return; if (length < 2) { isis_dissect_unknown(tvb, tree, offset, "short lsp reachability(%d vs %d)", length, 2 ); return; } /* * the MT ID value dissection is used in other LSPs so we push it * in a function */ dissect_lsp_mt_id(tvb, tree, offset); /* * fix here. No need to parse TLV 22 (with bugs) while it is * already done correctly!! */ dissect_lsp_ext_is_reachability_clv(tvb, tree, offset+2, 0, length-2); } /* * Name: dissect_lsp_partition_dis_clv() * * Description: * This CLV is used to indicate which system is the designated * IS for partition repair. This means just putting out the * "id_length"-octet IS. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : length of IDs in packet. * int : length of clv we are decoding * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_partition_dis_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length, int length) { if ( length < id_length ) { isis_dissect_unknown(tvb, tree, offset, "short lsp partition DIS(%d vs %d)", length, id_length ); return; } /* * Gotta build a sub-tree for all our pieces */ if ( tree ) { proto_tree_add_text ( tree, tvb, offset, id_length, "Partition designated L2 IS: %s", print_system_id( tvb_get_ptr(tvb, offset, id_length), id_length ) ); } length -= id_length; offset += id_length; if ( length > 0 ){ isis_dissect_unknown(tvb, tree, offset, "Long lsp partition DIS, %d left over", length ); return; } } /* * Name: dissect_lsp_prefix_neighbors_clv() * * Description: * The prefix CLV describes what other (OSI) networks we can reach * and what their cost is. It is built from a metric block * (see dissect_metric) followed by n addresses. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to fill out. May be NULL * int : offset into packet data where we are. * int : length of IDs in packet. * int : length of clv we are decoding * * Output: * void, but we will add to proto tree if !NULL. */ static void dissect_lsp_prefix_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int id_length _U_, int length) { char *sbuf; int mylen; if ( length < 4 ) { isis_dissect_unknown(tvb, tree, offset, "Short lsp prefix neighbors (%d vs 4)", length ); return; } if ( tree ) { dissect_metric (tvb, tree, offset, tvb_get_guint8(tvb, offset), "Default", TRUE ); dissect_metric (tvb, tree, offset+1, tvb_get_guint8(tvb, offset+1), "Delay", FALSE ); dissect_metric (tvb, tree, offset+2, tvb_get_guint8(tvb, offset+2), "Expense", FALSE ); dissect_metric (tvb, tree, offset+3, tvb_get_guint8(tvb, offset+3), "Error", FALSE ); } offset += 4; length -= 4; while ( length > 0 ) { mylen = tvb_get_guint8(tvb, offset); length--; if (length<=0) { isis_dissect_unknown(tvb, tree, offset, "Zero payload space after length in prefix neighbor" ); return; } if ( mylen > length) { isis_dissect_unknown(tvb, tree, offset, "Interal length of prefix neighbor too long (%d vs %d)", mylen, length ); return; } /* * Lets turn the area address into "standard" 0000.0000.etc * format string. */ sbuf = print_area( tvb_get_ptr(tvb, offset+1, mylen), mylen ); /* and spit it out */ if ( tree ) { proto_tree_add_text ( tree, tvb, offset, mylen + 1, "Area address (%d): %s", mylen, sbuf ); } offset += mylen + 1; length -= mylen; /* length already adjusted for len fld*/ } } /* * Name: isis_dissect_isis_lsp() * * Description: * Print out the LSP part of the main header and then call the CLV * de-mangler with the right list of valid CLVs. * * Input: * tvbuff_t * : tvbuffer for packet data * proto_tree * : protocol display tree to add to. May be NULL. * int offset : our offset into packet data. * int : LSP type, a la packet-isis.h ISIS_TYPE_* values * int : header length of packet. * int : length of IDs in packet. * * Output: * void, but we will add to proto tree if !NULL. */ void isis_dissect_isis_lsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset, int lsp_type, int header_length, int id_length) { proto_item *ti, *to, *ta; proto_tree *lsp_tree = NULL, *info_tree, *att_tree; guint16 pdu_length, checksum, cacl_checksum=0; guint8 lsp_info, lsp_att; int len, offset_checksum; if (tree) { ti = proto_tree_add_text(tree, tvb, offset, -1, PROTO_STRING_LSP); lsp_tree = proto_item_add_subtree(ti, ett_isis_lsp); } pdu_length = tvb_get_ntohs(tvb, offset); if (tree) { proto_tree_add_uint(lsp_tree, hf_isis_lsp_pdu_length, tvb, offset, 2, pdu_length); } offset += 2; if (tree) { proto_tree_add_text(lsp_tree, tvb, offset, 2, "Remaining Lifetime: %us", tvb_get_ntohs(tvb, offset)); } offset += 2; offset_checksum = offset; if (tree) { proto_tree_add_text(lsp_tree, tvb, offset, id_length + 2, "LSP-ID: %s", print_system_id( tvb_get_ptr(tvb, offset, id_length+2), id_length+2 ) ); } if (check_col(pinfo->cinfo, COL_INFO)) { col_append_fstr(pinfo->cinfo, COL_INFO, ", LSP-ID: %s", print_system_id( tvb_get_ptr(tvb, offset, id_length+2), id_length+2 ) ); } offset += id_length + 2; if (tree) { proto_tree_add_uint(lsp_tree, hf_isis_lsp_sequence_number, tvb, offset, 4, tvb_get_ntohl(tvb, offset)); } if (check_col(pinfo->cinfo, COL_INFO)) { col_append_fstr(pinfo->cinfo, COL_INFO, ", Sequence: 0x%08x, Lifetime: %5us", tvb_get_ntohl(tvb, offset), tvb_get_ntohs(tvb, offset - (id_length+2+2))); } offset += 4; if (tree) { checksum = tvb_get_ntohs(tvb, offset); switch (check_and_get_checksum(tvb, offset_checksum, pdu_length-12, checksum, offset, &cacl_checksum)) { case NO_CKSUM : proto_tree_add_uint_format(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum, "Checksum: 0x%04x (unused)", checksum); break; case DATA_MISSING : isis_dissect_unknown(tvb, tree, offset, "packet length %d went beyond packet", tvb_length_remaining(tvb, offset_checksum)); break; case CKSUM_NOT_OK : proto_tree_add_uint_format(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum, "Checksum: 0x%04x (incorrect, should be 0x%04x)", checksum, cacl_checksum); proto_tree_add_boolean_hidden(lsp_tree, hf_isis_lsp_checksum_bad, tvb, offset, 2, TRUE); break; case CKSUM_OK : proto_tree_add_uint_format(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum, "Checksum: 0x%04x (correct)", checksum); proto_tree_add_boolean_hidden(lsp_tree, hf_isis_lsp_checksum_bad, tvb, offset, 2, FALSE); break; default : g_message("'check_and_get_checksum' returned an invalid value"); } } offset += 2; if (tree) { /* * P | ATT | HIPPITY | IS TYPE description. */ lsp_info = tvb_get_guint8(tvb, offset); to = proto_tree_add_text(lsp_tree, tvb, offset, 1, "Type block(0x%02x): Partition Repair:%d, Attached bits:%d, Overload bit:%d, IS type:%d", lsp_info, ISIS_LSP_PARTITION(lsp_info), ISIS_LSP_ATT(lsp_info), ISIS_LSP_HIPPITY(lsp_info), ISIS_LSP_IS_TYPE(lsp_info) ); info_tree = proto_item_add_subtree(to, ett_isis_lsp_info); proto_tree_add_boolean(info_tree, hf_isis_lsp_p, tvb, offset, 1, lsp_info); ta = proto_tree_add_uint(info_tree, hf_isis_lsp_att, tvb, offset, 1, lsp_info); att_tree = proto_item_add_subtree(ta, ett_isis_lsp_att); lsp_att = ISIS_LSP_ATT(lsp_info); proto_tree_add_text(att_tree, tvb, offset, 1, "%d... = Error metric: %s", ISIS_LSP_ATT_ERROR(lsp_att), ISIS_LSP_ATT_ERROR(lsp_att) ? "Set" : "Unset"); proto_tree_add_text(att_tree, tvb, offset, 1, ".%d.. = Expense metric: %s", ISIS_LSP_ATT_EXPENSE(lsp_att), ISIS_LSP_ATT_EXPENSE(lsp_att) ? "Set" : "Unset"); proto_tree_add_text(att_tree, tvb, offset, 1, "..%d. = Delay metric: %s", ISIS_LSP_ATT_DELAY(lsp_att), ISIS_LSP_ATT_DELAY(lsp_att) ? "Set" : "Unset"); proto_tree_add_text(att_tree, tvb, offset, 1, "...%d = Default metric: %s", ISIS_LSP_ATT_DEFAULT(lsp_att), ISIS_LSP_ATT_DEFAULT(lsp_att) ? "Set" : "Unset"); proto_tree_add_boolean(info_tree, hf_isis_lsp_hippity, tvb, offset, 1, lsp_info); proto_tree_add_uint(info_tree, hf_isis_lsp_is_type, tvb, offset, 1, lsp_info); } offset += 1; len = pdu_length - header_length; if (len < 0) { isis_dissect_unknown(tvb, tree, offset, "packet header length %d went beyond packet", header_length ); return; } /* * Now, we need to decode our CLVs. We need to pass in * our list of valid ones! */ if (lsp_type == ISIS_TYPE_L1_LSP){ isis_dissect_clvs(tvb, lsp_tree, offset, clv_l1_lsp_opts, len, id_length, ett_isis_lsp_clv_unknown ); } else { isis_dissect_clvs(tvb, lsp_tree, offset, clv_l2_lsp_opts, len, id_length, ett_isis_lsp_clv_unknown ); } } /* * Name: isis_register_lsp() * * Description: * Register our protocol sub-sets with protocol manager. * * Input: * int : protocol index for the ISIS protocol * * Output: * void */ void isis_register_lsp(int proto_isis) { static hf_register_info hf[] = { { &hf_isis_lsp_pdu_length, { "PDU length", "isis.lsp.pdu_length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_remaining_life, { "Remaining lifetime", "isis.lsp.remaining_life", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_sequence_number, { "Sequence number", "isis.lsp.sequence_number", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_checksum, { "Checksum", "isis.lsp.checksum",FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_checksum_bad, { "Bad Checksum", "isis.lsp.checksum_bad", FT_BOOLEAN, BASE_NONE, NULL, 0, "Bad IS-IS LSP Checksum", HFILL }}, { &hf_isis_lsp_clv_ipv4_int_addr, { "IPv4 interface address", "isis.lsp.clv_ipv4_int_addr", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_clv_ipv6_int_addr, { "IPv6 interface address", "isis.lsp.clv_ipv6_int_addr", FT_IPv6, BASE_NONE, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_clv_te_router_id, { "Traffic Engineering Router ID", "isis.lsp.clv_te_router_id", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_clv_mt, { "MT-ID ", "isis.lsp.clv_mt", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }}, { &hf_isis_lsp_p, { "Partition Repair", "isis.lsp.partition_repair", FT_BOOLEAN, 8, TFS(&supported_string), ISIS_LSP_PARTITION_MASK, "If set, this router supports the optional Partition Repair function", HFILL }}, { &hf_isis_lsp_att, { "Attachment", "isis.lsp.att", FT_UINT8, BASE_DEC, NULL, ISIS_LSP_ATT_MASK, "", HFILL }}, { &hf_isis_lsp_hippity, { "Overload bit", "isis.lsp.overload", FT_BOOLEAN, 8, TFS(&hippity_string), ISIS_LSP_HIPPITY_MASK, "If set, this router will not be used by any decision process to calculate routes", HFILL }}, { &hf_isis_lsp_is_type, { "Type of Intermediate System", "isis.lsp.is_type", FT_UINT8, BASE_DEC, VALS(isis_lsp_istype_vals), ISIS_LSP_IS_TYPE_MASK, "", HFILL }}, }; static gint *ett[] = { &ett_isis_lsp, &ett_isis_lsp_info, &ett_isis_lsp_att, &ett_isis_lsp_clv_area_addr, &ett_isis_lsp_clv_is_neighbors, &ett_isis_lsp_clv_ext_is_reachability, /* CLV 22 */ &ett_isis_lsp_part_of_clv_ext_is_reachability, &ett_isis_lsp_subclv_admin_group, &ett_isis_lsp_subclv_unrsv_bw, &ett_isis_lsp_clv_unknown, &ett_isis_lsp_clv_partition_dis, &ett_isis_lsp_clv_prefix_neighbors, &ett_isis_lsp_clv_authentication, &ett_isis_lsp_clv_ip_authentication, &ett_isis_lsp_clv_nlpid, &ett_isis_lsp_clv_hostname, &ett_isis_lsp_clv_ipv4_int_addr, &ett_isis_lsp_clv_ipv6_int_addr, /* CLV 232 */ &ett_isis_lsp_clv_te_router_id, &ett_isis_lsp_clv_ip_reachability, &ett_isis_lsp_clv_ip_reach_subclv, &ett_isis_lsp_clv_ext_ip_reachability, /* CLV 135 */ &ett_isis_lsp_part_of_clv_ext_ip_reachability, &ett_isis_lsp_clv_ipv6_reachability, /* CLV 236 */ &ett_isis_lsp_part_of_clv_ipv6_reachability, &ett_isis_lsp_clv_mt, &ett_isis_lsp_clv_mt_is, &ett_isis_lsp_part_of_clv_mt_is, &ett_isis_lsp_clv_mt_reachable_IPv4_prefx, &ett_isis_lsp_clv_mt_reachable_IPv6_prefx, }; proto_register_field_array(proto_isis, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); }