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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:34:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:34:10 +0000
commite4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch)
tree68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-wccp.c
parentInitial commit. (diff)
downloadwireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz
wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-wccp.c')
-rw-r--r--epan/dissectors/packet-wccp.c3580
1 files changed, 3580 insertions, 0 deletions
diff --git a/epan/dissectors/packet-wccp.c b/epan/dissectors/packet-wccp.c
new file mode 100644
index 00000000..0f860804
--- /dev/null
+++ b/epan/dissectors/packet-wccp.c
@@ -0,0 +1,3580 @@
+/* packet-wccp.c
+ * Routines for Web Cache C* Protocol dissection
+ * Jerry Talkington <jtalkington@users.sourceforge.net>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/to_str.h>
+#include <epan/ipproto.h>
+#include <epan/expert.h>
+#include "packet-wccp.h"
+
+void proto_register_wccp(void);
+void proto_reg_handoff_wccp(void);
+
+static dissector_handle_t wccp_handle;
+
+static int proto_wccp = -1;
+static int hf_wccp_message_type = -1; /* the message type */
+static int hf_wccp_version = -1; /* protocol version */
+static int hf_bucket = -1;
+static int hf_bucket_bit = -1;
+static int hf_message_header_version = -1;
+static int hf_hash_revision = -1; /* the version of the hash */
+static int hf_change_num = -1; /* change number */
+static int hf_hash_flag = -1;
+static int hf_hash_flag_u = -1;
+static int hf_recvd_id = -1;
+static int hf_wc_num = -1;
+static int hf_wc_view_wc_num = -1;
+static int hf_cache_ip = -1;
+static int hf_message_header_length = -1;
+static int hf_item_type = -1;
+static int hf_item_length = -1;
+static int hf_item_data = -1;
+static int hf_security_info_option = -1;
+static int hf_security_info_md5_checksum = -1;
+static int hf_command_element_type = -1;
+static int hf_command_element_length = -1;
+static int hf_command_length = -1;
+static int hf_command_element_shutdown_ip_index = -1;
+static int hf_command_element_shutdown_ipv4 = -1;
+static int hf_command_element_shutdown_ipv6 = -1;
+static int hf_command_unknown = -1;
+static int hf_service_info_type = -1;
+static int hf_service_info_id_standard = -1;
+static int hf_service_info_id_dynamic = -1;
+static int hf_service_info_priority = -1;
+static int hf_service_info_protocol = -1;
+static int hf_service_info_flags = -1;
+static int hf_service_info_flags_src_ip_hash = -1;
+static int hf_service_info_flags_dest_ip_hash = -1;
+static int hf_service_info_flags_src_port_hash = -1;
+static int hf_service_info_flags_dest_port_hash = -1;
+static int hf_service_info_flags_ports_defined = -1;
+static int hf_service_info_flags_ports_source = -1;
+static int hf_service_info_flags_redirect_only_protocol_0 = -1;
+static int hf_service_info_flags_src_ip_alt_hash = -1;
+static int hf_service_info_flags_dest_ip_alt_hash = -1;
+static int hf_service_info_flags_src_port_alt_hash = -1;
+static int hf_service_info_flags_dest_port_alt_hash = -1;
+static int hf_service_info_flags_reserved = -1;
+static int hf_service_info_source_port = -1;
+static int hf_service_info_destination_port = -1;
+static int hf_router_identity_ip_index = -1;
+static int hf_router_identity_ipv4 = -1;
+static int hf_router_identity_ipv6 = -1;
+static int hf_router_identity_receive_id = -1;
+static int hf_router_identity_send_to_ip_index = -1;
+static int hf_router_identity_send_to_ipv4 = -1;
+static int hf_router_identity_send_to_ipv6 = -1;
+static int hf_router_identity_received_from_num = -1;
+static int hf_web_cache_identity_index = -1;
+static int hf_web_cache_identity_ipv4 = -1;
+static int hf_web_cache_identity_ipv6 = -1;
+static int hf_web_cache_identity_hash_rev = -1;
+static int hf_web_cache_identity_flags = -1;
+static int hf_web_cache_identity_flag_hash_info = -1;
+static int hf_web_cache_identity_flag_assign_type = -1;
+static int hf_web_cache_identity_flag_version_request = -1;
+static int hf_web_cache_identity_flag_reserved = -1;
+static int hf_mask_value_set_element_value_element_num = -1;
+static int hf_assignment_weight = -1;
+static int hf_assignment_status = -1;
+static int hf_assignment_key_ip_index = -1;
+static int hf_assignment_key_ipv4 = -1;
+static int hf_assignment_key_ipv6 = -1;
+static int hf_assignment_key_change_num = -1;
+static int hf_assignment_no_data = -1;
+static int hf_router_view_member_change_num = -1;
+static int hf_router_router_num = -1;
+static int hf_router_identity_router_ip_index = -1;
+static int hf_router_identity_router_ipv4 = -1;
+static int hf_router_identity_router_ipv6 = -1;
+static int hf_wc_view_info_change_num = -1;
+static int hf_wc_view_info_router_ip_index = -1;
+static int hf_wc_view_info_router_ipv4 = -1;
+static int hf_wc_view_info_router_ipv6 = -1;
+static int hf_wc_view_info_wc_ip_index = -1;
+static int hf_wc_view_info_wc_ipv4 = -1;
+static int hf_wc_view_info_wc_ipv6 = -1;
+static int hf_wc_view_router_num = -1;
+static int hf_wc_identity_ip_address_index = -1;
+static int hf_wc_identity_ip_address_ipv4 = -1;
+static int hf_wc_identity_ip_address_ipv6 = -1;
+static int hf_router_identity_received_from_ip_index = -1;
+static int hf_router_identity_received_from_ipv4 = -1;
+static int hf_router_identity_received_from_ipv6 = -1;
+static int hf_router_assignment_element_change_num = -1;
+static int hf_assignment_info_router_num = -1;
+static int hf_hash_buckets_assignment_wc_num = -1;
+static int hf_hash_buckets_assignment_wc_ip_index = -1;
+static int hf_hash_buckets_assignment_wc_ipv4 = -1;
+static int hf_hash_buckets_assignment_wc_ipv6 = -1;
+static int hf_assignment_info_router_ip_index = -1;
+static int hf_assignment_info_router_ipv4 = -1;
+static int hf_assignment_info_router_ipv6 = -1;
+static int hf_router_view_ip_index = -1;
+static int hf_router_view_ipv4 = -1;
+static int hf_router_view_ipv6 = -1;
+static int hf_router_query_info_ip_index = -1;
+static int hf_router_query_info_ipv4 = -1;
+static int hf_router_query_info_ipv6 = -1;
+static int hf_router_query_info_send_to_ip_index = -1;
+static int hf_router_query_info_send_to_ipv4 = -1;
+static int hf_router_query_info_send_to_ipv6 = -1;
+static int hf_router_query_info_target_ip_index = -1;
+static int hf_router_query_info_target_ipv4 = -1;
+static int hf_router_query_info_target_ipv6 = -1;
+static int hf_capability_element_type = -1;
+static int hf_capability_element_length = -1;
+static int hf_capability_info_value = -1;
+static int hf_capability_forwarding_method_flag_gre = -1;
+static int hf_capability_forwarding_method_flag_l2 = -1;
+static int hf_capability_assignment_method_flag_hash = -1;
+static int hf_capability_assignment_method_flag_mask = -1;
+static int hf_capability_return_method_flag_gre = -1;
+static int hf_capability_return_method_flag_l2 = -1;
+static int hf_capability_transmit_t = -1;
+static int hf_capability_transmit_t_upper_limit = -1;
+static int hf_capability_transmit_t_lower_limit = -1;
+static int hf_capability_timer_scale_timeout_scale = -1;
+static int hf_capability_timer_scale_ra_timer_scale = -1;
+static int hf_capability_timer_scale_timeout_scale_upper_limit = -1;
+static int hf_capability_timer_scale_timeout_scale_lower_limit = -1;
+static int hf_capability_timer_scale_ra_scale_upper_limit = -1;
+static int hf_capability_timer_scale_ra_scale_lower_limit = -1;
+static int hf_capability_value = -1;
+static int hf_reserved_zero = -1;
+static int hf_value_element_src_ip_index = -1;
+static int hf_value_element_src_ipv4 = -1;
+static int hf_value_element_src_ipv6 = -1;
+static int hf_value_element_dest_ip_index = -1;
+static int hf_value_element_dest_ipv4 = -1;
+static int hf_value_element_dest_ipv6 = -1;
+static int hf_value_element_src_port = -1;
+static int hf_value_element_dest_port = -1;
+static int hf_value_element_web_cache_ip_index = -1;
+static int hf_value_element_web_cache_ipv4 = -1;
+static int hf_value_element_web_cache_ipv6 = -1;
+static int hf_mask_value_set_list_num_elements = -1;
+static int hf_mask_element_src_ip = -1;
+static int hf_mask_element_dest_ip = -1;
+static int hf_mask_element_src_port = -1;
+static int hf_mask_element_dest_port = -1;
+static int hf_alt_assignment_info_assignment_type = -1;
+static int hf_extended_assignment_data_type = -1;
+static int hf_alt_assignment_info_assignment_length = -1;
+static int hf_alt_assignment_map_assignment_type = -1;
+static int hf_alt_assignment_map_assignment_length = -1;
+static int hf_extended_assignment_data_length = -1;
+static int hf_alt_assignment_info_num_routers = -1;
+static int hf_alt_assignment_mask_value_set_element_num_wc_value_elements = -1;
+static int hf_web_cache_value_element_wc_address_index = -1;
+static int hf_web_cache_value_element_wc_address_ipv4 = -1;
+static int hf_web_cache_value_element_wc_address_ipv6 = -1;
+static int hf_web_cache_value_element_num_values = -1;
+static int hf_web_cache_value_seq_num = -1;
+static int hf_alt_assignment_mask_value_set_list_num_elements = -1;
+static int hf_address_table_family = -1;
+static int hf_address_table_address_length = -1;
+static int hf_address_table_length = -1;
+static int hf_address_table_element = -1;
+
+static gint ett_wccp = -1;
+static gint ett_buckets = -1;
+static gint ett_hash_assignment_buckets = -1;
+static gint ett_mask_assignment_data_element = -1;
+static gint ett_alternate_mask_assignment_data_element = -1;
+static gint ett_extended_assigment_data_element = -1;
+static gint ett_table_element = -1;
+static gint ett_hash_flags = -1;
+static gint ett_wc_identity_flags = -1;
+static gint ett_cache_info = -1;
+static gint ett_security_info = -1;
+static gint ett_service_info = -1;
+static gint ett_service_flags = -1;
+static gint ett_service_info_ports = -1;
+static gint ett_wc_view_info_router_element = -1;
+static gint ett_router_identity_info = -1;
+static gint ett_wc_identity_element = -1;
+static gint ett_wc_identity_info = -1;
+static gint ett_router_view_info = -1;
+static gint ett_wc_view_info = -1;
+static gint ett_router_assignment_element = -1;
+static gint ett_hash_buckets_assignment_wc_element=-1;
+static gint ett_hash_buckets_assignment_buckets=-1;
+static gint ett_router_alt_assignment_element = -1;
+static gint ett_router_assignment_info = -1;
+static gint ett_query_info = -1;
+static gint ett_capabilities_info = -1;
+static gint ett_capability_element = -1;
+static gint ett_capability_forwarding_method = -1;
+static gint ett_capability_assignment_method = -1;
+static gint ett_capability_return_method = -1;
+static gint ett_capability_transmit_t = -1;
+static gint ett_capability_timer_scale = -1;
+static gint ett_alt_assignment_info = -1;
+static gint ett_alt_assignment_map = -1;
+static gint ett_address_table = -1;
+static gint ett_assignment_map = -1;
+static gint ett_command_extension = -1;
+static gint ett_alternate_mask_value_set=-1;
+static gint ett_alternate_mask_value_set_element=-1;
+static gint ett_mv_set_list = -1;
+static gint ett_mv_set_element = -1;
+static gint ett_mv_set_value_list = -1;
+static gint ett_alternate_mv_set_element_list = -1;
+static gint ett_web_cache_value_element_list = -1;
+static gint ett_alternate_mv_set_element = -1;
+static gint ett_value_element = -1;
+static gint ett_unknown_info = -1;
+
+static expert_field ei_wccp_missing_security_info = EI_INIT;
+static expert_field ei_wccp_missing_service_info = EI_INIT;
+static expert_field ei_wccp_missing_wc_id_info = EI_INIT;
+static expert_field ei_wccp_missing_router_id_info = EI_INIT;
+static expert_field ei_wccp_missing_query_info = EI_INIT;
+static expert_field ei_wccp_missing_wc_view_info = EI_INIT;
+static expert_field ei_wccp_missing_rtr_view_info = EI_INIT;
+static expert_field ei_wccp_contains_redirect_assignment = EI_INIT;
+static expert_field ei_wccp_contains_router_id_info = EI_INIT;
+static expert_field ei_wccp_contains_rtr_view_info = EI_INIT;
+static expert_field ei_wccp_contains_query_info = EI_INIT;
+static expert_field ei_wccp_contains_alt_assignment = EI_INIT;
+static expert_field ei_wccp_contains_assign_map = EI_INIT;
+static expert_field ei_wccp_contains_alt_assignment_map = EI_INIT;
+static expert_field ei_wccp_contains_wc_id_info = EI_INIT;
+static expert_field ei_wccp_contains_wc_view_info = EI_INIT;
+static expert_field ei_wccp_contains_capabilities_info = EI_INIT;
+static expert_field ei_wccp_contains_command_extension = EI_INIT;
+static expert_field ei_wccp_missing_assignment = EI_INIT;
+static expert_field ei_wccp_assignment_length_bad = EI_INIT;
+static expert_field ei_wccp_length_bad = EI_INIT;
+static expert_field ei_wccp_service_info_priority_nonzero = EI_INIT;
+static expert_field ei_wccp_service_info_protocol_nonzero = EI_INIT;
+static expert_field ei_wccp_router_identity_receive_id_zero = EI_INIT;
+static expert_field ei_wccp_web_cache_identity_hash_rev_zero = EI_INIT;
+static expert_field ei_wccp_address_table_family_unknown = EI_INIT;
+static expert_field ei_wccp_capability_element_length = EI_INIT;
+static expert_field ei_wccp_port_fields_not_used = EI_INIT;
+static expert_field ei_wccp_a_zero_not_c = EI_INIT;
+/* static expert_field ei_wccp_c_zero_not_a = EI_INIT; */
+
+/*
+ * At
+ *
+ * https://datatracker.ietf.org/doc/html/draft-forster-wrec-wccp-v1-00
+ *
+ * is the now-expired Internet-Draft for WCCP 1.0 (Web Cache Coordination
+ * Protocol V1.0).
+ *
+ * At
+ *
+ * https://datatracker.ietf.org/doc/html/draft-wilson-wrec-wccp-v2-01
+ *
+ * is the now-expired Internet-Draft for WCCP 2.0 (Web Cache Communication
+ * Protocol V2.0).
+ *
+ * https://datatracker.ietf.org/doc/html/draft-param-wccp-v2rev1-01
+ *
+ * is the now-expired Internet-Draft for WCCP 2.01 (Web Cache Communication
+ * Protocol V2, Revision 1).
+ */
+
+/* This is NOT IANA assigned */
+#define UDP_PORT_WCCP 2048
+
+#define WCCPv1 4
+#define WCCPv2 0x0200
+#define WCCPv2r1 0x0201
+#define WCCP_HERE_I_AM 7
+#define WCCP_I_SEE_YOU 8
+#define WCCP_ASSIGN_BUCKET 9
+#define WCCP2_HERE_I_AM 10
+#define WCCP2_I_SEE_YOU 11
+#define WCCP2_REDIRECT_ASSIGN 12
+#define WCCP2_REMOVAL_QUERY 13
+
+static const value_string wccp_type_vals[] = {
+ { WCCP_HERE_I_AM, "1.0 Here I am" },
+ { WCCP_I_SEE_YOU, "1.0 I see you" },
+ { WCCP_ASSIGN_BUCKET, "1.0 Assign bucket" },
+ { WCCP2_HERE_I_AM, "2.0 Here I am" },
+ { WCCP2_I_SEE_YOU, "2.0 I see you" },
+ { WCCP2_REDIRECT_ASSIGN, "2.0 Redirect assign" },
+ { WCCP2_REMOVAL_QUERY, "2.0 Removal query" },
+ { 0, NULL }
+};
+
+static const value_string wccp_version_val[] = {
+ { WCCPv1, "1"},
+ { WCCPv2, "2"},
+ { WCCPv2r1, "2.01"},
+ { 0, NULL}
+};
+
+static const true_false_string tfs_src_dest_port = { "Source port", "Destination port" };
+static const true_false_string tfs_redirect_protocol0 = { "Redirect only protocol 0 (IP)", "Redirect all traffic" };
+static const true_false_string tfs_historical_current = { "Historical", "Current" };
+static const true_false_string tfs_version_min_max = {"WCCP version set is maximum supported by CE", "WCCP version set is minimum supported by CE"};
+
+static const value_string wccp_address_family_val[] = {
+ { 0, "Reserved" },
+ { 1, "IPv4" },
+ { 2, "IPv6" },
+ { 0, NULL }
+};
+
+
+#define WCCP2_HASH_ASSIGNMENT_TYPE 0
+#define WCCP2_MASK_ASSIGNMENT_TYPE 1
+#define WCCP2r1_ALT_MASK_ASSIGNMENT_TYPE 2
+#define WCCP2r1_ASSIGNMENT_WEIGHT_STATUS 3
+
+static const value_string assignment_type_vals[] = {
+ { WCCP2_HASH_ASSIGNMENT_TYPE, "Hash" },
+ { WCCP2_MASK_ASSIGNMENT_TYPE, "Mask" },
+ { WCCP2r1_ALT_MASK_ASSIGNMENT_TYPE, "WCCP2r1 Alternate Mask"},
+ { WCCP2r1_ASSIGNMENT_WEIGHT_STATUS, "WCCP2r1 Assignment Weight Status"},
+ { 0, NULL }
+};
+
+#define HASH_INFO_SIZE (4*(1+8+1))
+
+#define WCCP2_SECURITY_INFO 0
+#define WCCP2_SERVICE_INFO 1
+#define WCCP2_ROUTER_ID_INFO 2
+#define WCCP2_WC_ID_INFO 3
+#define WCCP2_RTR_VIEW_INFO 4
+#define WCCP2_WC_VIEW_INFO 5
+#define WCCP2_REDIRECT_ASSIGNMENT 6
+#define WCCP2_QUERY_INFO 7
+#define WCCP2_CAPABILITIES_INFO 8
+#define WCCP2_ALT_ASSIGNMENT 13
+#define WCCP2_ASSIGN_MAP 14
+#define WCCP2_COMMAND_EXTENSION 15
+/* WCCP 2 r1 additions: */
+#define WCCP2r1_ALT_ASSIGNMENT_MAP 16
+#define WCCP2r1_ADDRESS_TABLE 17
+
+ static const value_string info_type_vals[] = {
+ { WCCP2_SECURITY_INFO, "Security Info" },
+ { WCCP2_SERVICE_INFO, "Service Info" },
+ { WCCP2_ROUTER_ID_INFO, "Router Identity Info" },
+ { WCCP2_WC_ID_INFO, "Web-Cache Identity Info" },
+ { WCCP2_RTR_VIEW_INFO, "Router View Info" },
+ { WCCP2_WC_VIEW_INFO, "Web-Cache View Info" },
+ { WCCP2_REDIRECT_ASSIGNMENT, "Assignment Info" },
+ { WCCP2_QUERY_INFO, "Router Query Info" },
+ { WCCP2_CAPABILITIES_INFO, "Capabilities Info" },
+ { WCCP2_ALT_ASSIGNMENT, "Alternate Assignment" },
+ { WCCP2_ASSIGN_MAP, "Assignment Map" },
+ { WCCP2_COMMAND_EXTENSION, "Command Extension" },
+ { WCCP2r1_ALT_ASSIGNMENT_MAP, "Alternative Assignment Map" },
+ { WCCP2r1_ADDRESS_TABLE, "Address Table" },
+ { 0, NULL }
+ };
+
+const value_string service_id_vals[] = {
+ { 0x00, "HTTP" },
+ { 0, NULL }
+};
+
+typedef struct capability_flag {
+ guint32 value;
+ const char *short_name;
+ int* phf;
+} capability_flag;
+
+
+
+
+#define WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_HASH 0
+#define WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_MASK 1
+#define WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_NOT_PRESENT 2
+#define WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_EXTENDED 3
+
+static const value_string wccp_web_cache_assignment_data_type_val[] = {
+ { WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_HASH , "Hash Assignment Data Element"},
+ { WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_MASK , "Mask Assignment Data Element"},
+ { WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_NOT_PRESENT , "Assignment Data Element Not Present"},
+ { WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_EXTENDED , "Extended Assignment Data Element"},
+ { 0, NULL }
+};
+
+#define WCCP2_FORWARDING_METHOD 0x01
+#define WCCP2_ASSIGNMENT_METHOD 0x02
+#define WCCP2_PACKET_RETURN_METHOD 0x03
+#define WCCP2_TRANSMIT_T 0x04
+#define WCCP2_TIMER_SCALE 0x05
+
+static const value_string capability_type_vals[] = {
+ { WCCP2_FORWARDING_METHOD, "Forwarding Method" },
+ { WCCP2_ASSIGNMENT_METHOD, "Assignment Method" },
+ { WCCP2_PACKET_RETURN_METHOD, "Packet Return Method" },
+ { WCCP2_TRANSMIT_T, "Transmit_t Message interval values"},
+ { WCCP2_TIMER_SCALE, "Timer_scale Timeout scale values"},
+ { 0, NULL }
+};
+
+
+/* with version 2.01 we now have a address table which is possibly present */
+
+typedef struct wccp_address_table {
+ gboolean in_use;
+ gint16 family;
+ gint16 version;
+ guint16 table_length;
+ guint32 *table_ipv4;
+ ws_in6_addr *table_ipv6;
+} wccp_address_table;
+
+static int wccp_bucket_info(guint8 bucket_info, proto_tree *bucket_tree,
+ guint32 start, tvbuff_t *tvb, int offset);
+
+/* The V2 dissectors will return the remaining length of the packet
+ and a negative number if there are missing bytes to finish the
+ dissection */
+static gint dissect_wccp2_mask_assignment_data_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table);
+static gint dissect_wccp2_hash_buckets_assignment_element(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table);
+static gint dissect_wccp2r1_address_table_info(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo, proto_tree *info_tree,
+ wccp_address_table* wccp_wccp_address_table);
+static gint dissect_wccp2_hash_assignment_data_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree);
+static gint dissect_wccp2_assignment_weight_and_status_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree);
+static gint dissect_wccp2_extended_assignment_data_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table);
+static gint dissect_wccp2_capability_element(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo _U_, proto_tree *info_tree);
+static gint dissect_wccp2_mask_value_set_list(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table);
+
+/* Utility functions */
+static gint dissect_wccp2_mask_value_set_element(tvbuff_t *tvb, int offset,
+ gint length, int idx, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table);
+static gint dissect_wccp2_alternate_mask_value_set_list(tvbuff_t *tvb, int offset,
+ gint length, packet_info *pinfo _U_, proto_tree *info_tree, wccp_address_table* addr_table);
+static gint dissect_wccp2_alternate_mask_value_set_element(tvbuff_t *tvb, int offset, gint length, guint el_index, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table);
+static gint dissect_wccp2_web_cache_value_element(tvbuff_t *tvb, int offset,
+ gint length, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table);
+static void dissect_32_bit_capability_flags(tvbuff_t *tvb, int curr_offset,
+ guint16 capability_val_len, gint ett, const capability_flag *flags,
+ proto_tree *element_tree, proto_item *header,
+ proto_item *length_item, packet_info *pinfo);
+static void dissect_transmit_t_capability(tvbuff_t *tvb, proto_item *te, int curr_offset,
+ guint16 capability_val_len, gint ett, proto_tree *element_tree,
+ proto_item *length_item, packet_info *pinfo);
+static void dissect_timer_scale_capability(tvbuff_t *tvb, int curr_offset,
+ guint16 capability_val_len, gint ett, proto_tree *element_tree,
+ proto_item *length_item, packet_info *pinfo);
+
+
+
+
+/*
+ * In WCCP 2.01 addresses are encoded to support IPv6 with 32 bit fields
+ *
+ * handle the decoding
+ */
+
+static void
+find_wccp_address_table(tvbuff_t *tvb, int offset,
+ packet_info *pinfo, proto_tree *wccp_tree _U_, wccp_address_table* wccp_wccp_address_table)
+{
+ guint16 type;
+ guint16 item_length;
+
+ for (;;) {
+ if (4 > tvb_reported_length_remaining(tvb, offset)) {
+ /* We've run out of packet data without finding an address table,
+ so there's no address table in the packet. */
+ return;
+ }
+ type = tvb_get_ntohs(tvb, offset);
+ item_length = tvb_get_ntohs(tvb, offset+2);
+
+ if ((item_length + 4) > tvb_reported_length_remaining(tvb, offset)) {
+ /* We've run out of packet data without finding an address table,
+ so there's no address table in the packet. */
+ return;
+ }
+
+ if (type == WCCP2r1_ADDRESS_TABLE)
+ {
+ dissect_wccp2r1_address_table_info(tvb, offset+4, item_length, pinfo, NULL, wccp_wccp_address_table);
+ /* no need to decode the rest */
+ return;
+ }
+
+ offset = offset + (item_length + 4);
+ }
+}
+
+
+/* This function prints the IP or the encoded IP if the table exists */
+
+/* at most an IPv6 IP: see
+ http://stackoverflow.com/questions/166132/maximum-length-of-the-textual-representation-of-an-ipv6-address
+
+ 39 = 8 groups of 4 digits with 7 : characters
+
+ or
+
+ 45 = IPv4 tunnel features: 0000:0000:0000:0000:0000:0000:192.168.0.1
+*/
+
+/* problem here is that the IP is in network byte order for IPv4
+ we need to fix that
+*/
+
+static const gchar * decode_wccp_encoded_address(tvbuff_t *tvb, int offset, packet_info *pinfo _U_,
+ proto_tree *info_tree _U_, wccp_address_table* addr_table)
+{
+ guint32 host_addr;
+ gchar *buffer;
+
+ /* are we using an address table? */
+ if (!addr_table->in_use)
+ {
+ /* no; return the IPv4 IP */
+ host_addr = tvb_get_ipv4(tvb,offset);
+ buffer = (char *) wmem_alloc(wmem_packet_scope(), WS_INET_ADDRSTRLEN);
+ ip_to_str_buf( (guint8 *) &host_addr, buffer, WS_INET_ADDRSTRLEN);
+ }
+ else
+ {
+ /* yes; we need to decode the encoded address */
+ guint16 reserv;
+ guint16 addr_index;
+
+ host_addr = tvb_get_ntohl(tvb,offset);
+ reserv = (host_addr & 0xFFFF0000) >> 16;
+ addr_index = (host_addr & 0x0000FFFF);
+
+ if (reserv != 0) {
+ buffer = wmem_strdup(wmem_packet_scope(), "INVALID: reserved part non zero");
+ }
+ else {
+ /* now check if it's IPv4 or IPv6 we need to print */
+ switch (addr_table->family) {
+ case 1:
+ /* IPv4 */
+
+ /* special case: index 0 -> undefined IP */
+ if (addr_index == 0) {
+ buffer = wmem_strdup(wmem_packet_scope(), "0.0.0.0");
+ break;
+ }
+ /* are we be beyond the end of the table? */
+ if (addr_index > addr_table->table_length) {
+ buffer = wmem_strdup_printf(wmem_packet_scope(), "INVALID IPv4 index: %d > %d",
+ addr_index, addr_table->table_length);
+ break;
+ }
+
+ /* ok get the IP */
+ if (addr_table->table_ipv4 != NULL) {
+ buffer = (char *) wmem_alloc(wmem_packet_scope(), WS_INET_ADDRSTRLEN);
+ ip_to_str_buf( (guint8 *) &(addr_table->table_ipv4[addr_index-1]), buffer, WS_INET_ADDRSTRLEN);
+ }
+ else {
+ buffer = wmem_strdup(wmem_packet_scope(), "INVALID IPv4 table empty!");
+ }
+ break;
+ case 2:
+ /* IPv6 */
+ /* special case: index 0 -> undefined IP */
+ if (addr_index == 0) {
+ buffer = wmem_strdup(wmem_packet_scope(), "::");
+ break;
+ }
+
+ /* are we be beyond the end of the table? */
+ if (addr_index > addr_table->table_length) {
+ buffer = wmem_strdup_printf(wmem_packet_scope(), "INVALID IPv6 index: %d > %d",
+ addr_index, addr_table->table_length);
+ break;
+ }
+
+ /* ok get the IP */
+ if (addr_table->table_ipv6 != NULL) {
+ buffer = (char *) wmem_alloc(wmem_packet_scope(), WS_INET6_ADDRSTRLEN);
+ ip6_to_str_buf(&(addr_table->table_ipv6[addr_index-1]), buffer, WS_INET6_ADDRSTRLEN);
+ }
+ else {
+ buffer = wmem_strdup(wmem_packet_scope(), "INVALID IPv6 table empty!");
+ }
+ break;
+ default:
+ buffer = wmem_strdup(wmem_packet_scope(), "INVALID IP family");
+ break;
+ }
+ }
+ }
+
+ return buffer;
+}
+
+static proto_item* wccp_add_ipaddress_item(proto_tree* tree, int hf_index, int hf_ipv4, int hf_ipv6, tvbuff_t *tvb,
+ int offset, gint length, wccp_address_table* addr_table)
+{
+ guint32 host_addr;
+ ws_in6_addr ipv6_zero;
+ guint16 reserv, addr_index;
+
+ /* are we using an address table? */
+ if (! addr_table->in_use)
+ return proto_tree_add_item(tree, hf_ipv4, tvb, offset, length, ENC_BIG_ENDIAN);
+
+ host_addr = tvb_get_ntohl(tvb, offset);
+
+ /* we need to decode the encoded address: */
+ reserv = (host_addr & 0xFFFF0000) >> 16;
+ addr_index = (host_addr & 0x0000FFFF);
+
+ memset(&ipv6_zero, 0, sizeof(ipv6_zero));
+
+ if (reserv != 0)
+ return proto_tree_add_uint_format_value(tree, hf_index, tvb, offset, length, host_addr, "INVALID: reserved part non zero");
+
+ /* now check if it's IPv4 or IPv6 we need to print */
+ switch (addr_table->family) {
+ case 1:
+ /* IPv4 */
+
+ /* special case: index 0 -> undefined IP */
+ if (addr_index == 0) {
+ return proto_tree_add_item(tree, hf_ipv4, tvb, offset, length, ENC_LITTLE_ENDIAN);
+ }
+ /* are we be beyond the end of the table? */
+ if (addr_index > addr_table->table_length) {
+ return proto_tree_add_uint_format_value(tree, hf_index, tvb, offset, length, host_addr,
+ "INVALID IPv4 index: %d > %d", addr_index, addr_table->table_length);
+ }
+
+ /* ok get the IP */
+ if (addr_table->table_ipv4 != NULL) {
+ return proto_tree_add_ipv4(tree, hf_ipv4, tvb, offset, length, addr_table->table_ipv4[addr_index-1]);
+ }
+
+ return proto_tree_add_uint_format_value(tree, hf_index, tvb, offset, length, host_addr, "INVALID: IPv4 table empty!");
+
+ case 2:
+ /* IPv6 */
+ /* special case: index 0 -> undefined IP */
+ if (addr_index == 0) {
+ return proto_tree_add_ipv6(tree, hf_ipv6, tvb, offset, length, &ipv6_zero);
+ }
+
+ /* are we be beyond the end of the table? */
+ if (addr_index > addr_table->table_length) {
+ return proto_tree_add_uint_format_value(tree, hf_index, tvb, offset, length, host_addr,
+ "INVALID IPv6 index: %d > %d", addr_index, addr_table->table_length);
+ }
+
+ /* ok get the IP */
+ if (addr_table->table_ipv6 != NULL) {
+ return proto_tree_add_ipv6(tree, hf_ipv6, tvb, offset, length, &(addr_table->table_ipv6[addr_index-1]));
+ }
+
+ return proto_tree_add_uint_format_value(tree, hf_index, tvb, offset, length, host_addr,
+ "INVALID IPv6 table empty!");
+ }
+
+ return proto_tree_add_ipv4_format(tree, hf_index, tvb, offset, length, host_addr, "INVALID IP family");
+}
+
+#define WCCP_IP_MAX_LENGTH (WS_INET_ADDRSTRLEN > 46 ? WS_INET_ADDRSTRLEN : 46)
+
+
+static guint
+dissect_hash_data(tvbuff_t *tvb, int offset, proto_tree *wccp_tree)
+{
+ proto_tree *bucket_tree;
+ proto_item *tf;
+ proto_tree *field_tree;
+ int i;
+ guint8 bucket_info;
+ int n;
+
+ proto_tree_add_item(wccp_tree, hf_hash_revision, tvb, offset, 4,
+ ENC_BIG_ENDIAN);
+ offset += 4;
+
+ bucket_tree = proto_tree_add_subtree(wccp_tree, tvb, offset, 32,
+ ett_buckets, NULL, "Hash information");
+
+ for (i = 0, n = 0; i < 32; i++) {
+ bucket_info = tvb_get_guint8(tvb, offset);
+ n = wccp_bucket_info(bucket_info, bucket_tree, n, tvb, offset);
+ offset += 1;
+ }
+ tf = proto_tree_add_item(wccp_tree, hf_hash_flag, tvb, offset, 4, ENC_BIG_ENDIAN);
+ field_tree = proto_item_add_subtree(tf, ett_hash_flags);
+ proto_tree_add_item(field_tree, hf_hash_flag_u, tvb, offset, 4, ENC_BIG_ENDIAN);
+ offset += 4;
+ return offset;
+}
+
+static guint
+dissect_web_cache_list_entry(tvbuff_t *tvb, int offset, int idx,
+ proto_tree *wccp_tree)
+{
+ proto_tree *list_entry_tree;
+
+ list_entry_tree = proto_tree_add_subtree_format(wccp_tree, tvb, offset, 4 + HASH_INFO_SIZE,
+ ett_cache_info, NULL, "Web-Cache List Entry(%d)", idx);
+ proto_tree_add_item(list_entry_tree, hf_cache_ip, tvb, offset, 4,
+ ENC_BIG_ENDIAN);
+ offset += 4;
+ offset = dissect_hash_data(tvb, offset, list_entry_tree);
+ return offset;
+}
+
+/*
+ * wccp_bucket_info()
+ * takes an integer representing a "Hash Information" bitmap, and spits out
+ * the corresponding proto_tree entries, returning the next bucket number.
+ */
+static int
+wccp_bucket_info(guint8 bucket_info, proto_tree *bucket_tree, guint32 start,
+ tvbuff_t *tvb, int offset)
+{
+ guint32 i;
+
+ for(i = 0; i < 8; i++) {
+ proto_tree_add_uint_format(bucket_tree, hf_bucket_bit, tvb, offset, 1, bucket_info & 1<<i,
+ "Bucket %3d: %s", start, (bucket_info & 1<<i ? "Assigned" : "Not Assigned") );
+ start++;
+ }
+ return(start);
+}
+
+
+/* the following functions all need to check the length and the offset
+ so we have a few macros to use
+*/
+
+#define EAT(x) {length -= x; offset += x;}
+
+#define EAT_AND_CHECK(x,next) {length -= x; offset += x; if (length < next) return length - next;}
+
+#define CHECK_LENGTH_ADVANCE_OFFSET(new_length) { \
+ int old_offset = offset; \
+ if (new_length<0) return new_length; \
+ offset += length-new_length; \
+ if (old_offset >= offset) return offset - old_offset; \
+ length = new_length; \
+ }
+
+
+/* 5.1.1 Security Info Component */
+
+/* Security options */
+
+#define WCCP2_NO_SECURITY 0
+#define WCCP2_MD5_SECURITY 1
+
+#define SECURITY_INFO_LEN 4
+
+static const value_string security_option_vals[] = {
+ { WCCP2_NO_SECURITY, "None" },
+ { WCCP2_MD5_SECURITY, "MD5" },
+ { 0, NULL }
+};
+
+
+static gint
+dissect_wccp2_security_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo _U_, proto_tree *info_tree, wccp_address_table* addr_table _U_)
+{
+ guint32 security_option;
+
+ if (length < SECURITY_INFO_LEN)
+ return (length-SECURITY_INFO_LEN);
+
+ security_option = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_item(info_tree, hf_security_info_option, tvb, offset, 4, ENC_BIG_ENDIAN);
+
+ if (security_option == WCCP2_MD5_SECURITY) {
+ offset += 4;
+
+ proto_tree_add_item(info_tree, hf_security_info_md5_checksum, tvb, offset, length-4, ENC_NA);
+
+ return length-4-16;
+ }
+ return length-4;
+}
+
+
+/* 5.1.2 Service Info Component */
+
+#define SERVICE_INFO_LEN (4+4+8*2)
+
+#define WCCP2_SERVICE_STANDARD 0
+#define WCCP2_SERVICE_DYNAMIC 1
+
+static const value_string service_type_vals[] = {
+ { WCCP2_SERVICE_STANDARD, "Standard predefined service"},
+ { WCCP2_SERVICE_DYNAMIC, "Dynamic CE defined service" },
+ { 0, NULL }
+};
+
+/*
+ * Service flags.
+ */
+#define WCCP2_SI_SRC_IP_HASH 0x00000001
+#define WCCP2_SI_DST_IP_HASH 0x00000002
+#define WCCP2_SI_SRC_PORT_HASH 0x00000004
+#define WCCP2_SI_DST_PORT_HASH 0x00000008
+#define WCCP2_SI_PORTS_DEFINED 0x00000010
+#define WCCP2_SI_PORTS_SOURCE 0x00000020
+#define WCCP2r1_SI_REDIRECT_ONLY_PROTOCOL_0 0x00000040
+#define WCCP2_SI_SRC_IP_ALT_HASH 0x00000100
+#define WCCP2_SI_DST_IP_ALT_HASH 0x00000200
+#define WCCP2_SI_SRC_PORT_ALT_HASH 0x00000400
+#define WCCP2_SI_DST_PORT_ALT_HASH 0x00000800
+
+
+static gint
+dissect_wccp2_service_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table _U_)
+{
+ guint8 service_type;
+ guint32 flags;
+ proto_item *tf;
+ proto_tree *ports_tree;
+ int i;
+ int max_offset = offset+length;
+
+ static int * const flag_fields[] = {
+ &hf_service_info_flags_src_ip_hash,
+ &hf_service_info_flags_dest_ip_hash,
+ &hf_service_info_flags_src_port_hash,
+ &hf_service_info_flags_dest_port_hash,
+ &hf_service_info_flags_ports_defined,
+ &hf_service_info_flags_ports_source,
+ &hf_service_info_flags_redirect_only_protocol_0,
+ &hf_service_info_flags_src_ip_alt_hash,
+ &hf_service_info_flags_dest_ip_alt_hash,
+ &hf_service_info_flags_src_port_alt_hash,
+ &hf_service_info_flags_dest_port_alt_hash,
+ &hf_service_info_flags_reserved,
+ NULL
+ };
+
+ if (length != SERVICE_INFO_LEN)
+ return length - SERVICE_INFO_LEN;
+
+ service_type = tvb_get_guint8(tvb, offset);
+ proto_tree_add_item(info_tree, hf_service_info_type, tvb,
+ offset, 1, ENC_BIG_ENDIAN);
+
+ switch (service_type) {
+
+ case WCCP2_SERVICE_STANDARD:
+ proto_tree_add_item(info_tree, hf_service_info_id_standard, tvb,
+ offset +1 , 1, ENC_BIG_ENDIAN);
+
+ tf = proto_tree_add_item(info_tree, hf_service_info_priority, tvb, offset+2, 1, ENC_BIG_ENDIAN);
+ if (tvb_get_guint8(tvb, offset+2) != 0)
+ expert_add_info(pinfo, tf, &ei_wccp_service_info_priority_nonzero);
+
+ tf = proto_tree_add_item(info_tree, hf_service_info_protocol, tvb,
+ offset+3, 1, ENC_BIG_ENDIAN);
+
+ if (tvb_get_guint8(tvb, offset+3) != 0)
+ expert_add_info(pinfo, tf, &ei_wccp_service_info_protocol_nonzero);
+ break;
+
+ case WCCP2_SERVICE_DYNAMIC:
+ proto_tree_add_item(info_tree, hf_service_info_id_dynamic, tvb,
+ offset +1 , 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(info_tree, hf_service_info_priority, tvb,
+ offset+2, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(info_tree, hf_service_info_protocol, tvb,
+ offset+3, 1, ENC_BIG_ENDIAN);
+ break;
+ }
+ offset += 4;
+
+ flags = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_bitmask(info_tree, tvb, offset, hf_service_info_flags, ett_service_flags, flag_fields, ENC_BIG_ENDIAN);
+
+ offset += 4;
+
+ if (flags & WCCP2_SI_PORTS_DEFINED) {
+ ports_tree = proto_tree_add_subtree(info_tree, tvb, offset, 2*8,
+ ett_service_info_ports, &tf, "Ports list: ");
+
+ for (i = 0; i < 8; i++) {
+ guint16 port = tvb_get_ntohs(tvb, offset);
+
+ if (port) {
+ if (flags & WCCP2_SI_SRC_PORT_HASH)
+ proto_tree_add_item(ports_tree, hf_service_info_source_port, tvb, offset, 2, ENC_BIG_ENDIAN);
+ else
+ proto_tree_add_item(ports_tree, hf_service_info_destination_port, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_item_append_text(tf, " %d", port);
+ }
+ offset += 2;
+ DISSECTOR_ASSERT(offset <= max_offset);
+ }
+ }
+ else {
+ /* just use up the space if there is */
+ if (offset + 8 * 2 <= max_offset) {
+ proto_tree_add_expert(info_tree, pinfo, &ei_wccp_port_fields_not_used, tvb, offset, 8*2);
+ /*offset += 8*2;*/
+ }
+ }
+
+ return length - SERVICE_INFO_LEN;
+}
+
+/* 6.1 Router Identity Element */
+static void
+dissect_wccp2_router_identity_element(tvbuff_t *tvb, int offset, packet_info *pinfo,
+ proto_tree *tree, wccp_address_table* addr_table)
+{
+ proto_item *tf;
+
+
+ wccp_add_ipaddress_item(tree, hf_router_identity_ip_index, hf_router_identity_ipv4, hf_router_identity_ipv6, tvb, offset, 4, addr_table);
+ tf = proto_tree_add_item(tree, hf_router_identity_receive_id, tvb, offset+4, 4, ENC_BIG_ENDIAN);
+
+ if (tvb_get_ntohl(tvb, offset + 4) == 0)
+ expert_add_info(pinfo, tf, &ei_wccp_router_identity_receive_id_zero);
+}
+
+#define ROUTER_ID_INFO_MIN_LEN (8+4+4)
+
+/* 5.3.1 Router Identity Info Component */
+static gint
+dissect_wccp2_router_identity_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint32 n_received_from;
+ guint i;
+ proto_item *te;
+ proto_tree *element_tree;
+
+ if (length < 8)
+ return length - ROUTER_ID_INFO_MIN_LEN;
+
+
+ te = wccp_add_ipaddress_item(info_tree, hf_router_identity_router_ip_index, hf_router_identity_router_ipv4, hf_router_identity_router_ipv6, tvb, offset, 4, addr_table);
+
+ element_tree = proto_item_add_subtree(te,ett_wc_view_info_router_element);
+
+ dissect_wccp2_router_identity_element(tvb,offset,pinfo,element_tree, addr_table);
+ EAT_AND_CHECK(8,4);
+
+ wccp_add_ipaddress_item(info_tree, hf_router_identity_send_to_ip_index, hf_router_identity_send_to_ipv4, hf_router_identity_send_to_ipv6, tvb, offset, 4, addr_table);
+ EAT_AND_CHECK(4,4);
+
+ n_received_from = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_item(info_tree, hf_router_identity_received_from_num, tvb, offset, 4, ENC_BIG_ENDIAN);
+ EAT(4);
+
+ for (i = 0; i < n_received_from; i++) {
+ if (length < 4)
+ return length-4*(i-n_received_from);
+
+
+ wccp_add_ipaddress_item(info_tree, hf_router_identity_received_from_ip_index, hf_router_identity_received_from_ipv4, hf_router_identity_received_from_ipv6, tvb, offset, 4, addr_table);
+ EAT(4);
+ }
+
+ return length;
+}
+
+#define ROUTER_WC_ID_ELEMENT_MIN_LEN (4+2+2)
+
+/* 6.4 Web-Cache Identity Element */
+static gint
+dissect_wccp2_web_cache_identity_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_item *tf;
+ guint16 flags;
+ guint data_element_type;
+
+ static int * const flag_fields[] = {
+ &hf_web_cache_identity_flag_hash_info,
+ &hf_web_cache_identity_flag_assign_type,
+ &hf_web_cache_identity_flag_version_request,
+ &hf_web_cache_identity_flag_reserved,
+ NULL
+ };
+
+ if (length < ROUTER_WC_ID_ELEMENT_MIN_LEN)
+ return length - ROUTER_WC_ID_ELEMENT_MIN_LEN;
+
+ wccp_add_ipaddress_item(info_tree, hf_web_cache_identity_index, hf_web_cache_identity_ipv4, hf_web_cache_identity_ipv6, tvb, offset, 4, addr_table);
+ EAT_AND_CHECK(4,2);
+
+ tf = proto_tree_add_item(info_tree, hf_web_cache_identity_hash_rev, tvb, offset, 2, ENC_BIG_ENDIAN);
+ if (tvb_get_ntohs(tvb, offset) != 0)
+ expert_add_info(pinfo, tf, &ei_wccp_web_cache_identity_hash_rev_zero);
+
+ EAT_AND_CHECK(2,2);
+
+ flags = tvb_get_ntohs(tvb, offset);
+ data_element_type = (flags & 0x6) >> 1;
+ proto_tree_add_bitmask(info_tree, tvb, offset, hf_web_cache_identity_flags, ett_wc_identity_flags, flag_fields, ENC_BIG_ENDIAN);
+
+ EAT(2);
+
+ switch (data_element_type) {
+ case WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_HASH:
+ return dissect_wccp2_hash_assignment_data_element(tvb,offset,length,pinfo,info_tree);
+ case WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_MASK:
+ return dissect_wccp2_mask_assignment_data_element(tvb,offset,length,pinfo,info_tree, addr_table);
+
+ case WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_NOT_PRESENT:
+ proto_tree_add_item(info_tree, hf_assignment_no_data, tvb, offset, 2, ENC_NA);
+ return length;
+ break;
+ case WCCP2_WEB_CACHE_ASSIGNMENT_DATA_TYPE_EXTENDED:
+ return dissect_wccp2_extended_assignment_data_element(tvb,offset,length,pinfo,info_tree, addr_table);
+ }
+ return length;
+}
+
+/* 5.2.1 Web-Cache Identity Info Component */
+static gint
+dissect_wccp2_wc_identity_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo _U_, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_item *te;
+ proto_tree *element_tree;
+
+ te = wccp_add_ipaddress_item(info_tree, hf_wc_identity_ip_address_index, hf_wc_identity_ip_address_ipv4, hf_wc_identity_ip_address_ipv6,
+ tvb, offset, 4, addr_table);
+
+ element_tree = proto_item_add_subtree(te, ett_wc_identity_element);
+ return dissect_wccp2_web_cache_identity_element(tvb, offset,length, pinfo,
+ element_tree, addr_table);
+}
+
+/* 6.3 Assignment Key Element */
+static gint
+dissect_wccp2_assignment_key_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo _U_,
+ proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ if (length < 8)
+ return length -8;
+
+
+ wccp_add_ipaddress_item(info_tree, hf_assignment_key_ip_index, hf_assignment_key_ipv4, hf_assignment_key_ipv6, tvb, offset, 4, addr_table);
+
+ EAT_AND_CHECK(4,4);
+ proto_tree_add_item(info_tree, hf_assignment_key_change_num, tvb, offset, 4, ENC_BIG_ENDIAN);
+ EAT(4);
+
+ return length;
+}
+
+
+#define ROUTER_VIEW_INFO_MIN_LEN (4+8+4+4)
+
+/* 5.3.2 Router View Info Component */
+static gint
+dissect_wccp2_router_view_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint32 n_routers;
+ guint32 n_web_caches;
+ guint i;
+ proto_item *te;
+ proto_tree *element_tree;
+ gint new_length;
+
+ if (length < ROUTER_VIEW_INFO_MIN_LEN)
+ return length - ROUTER_VIEW_INFO_MIN_LEN;
+
+ proto_tree_add_item(info_tree, hf_router_view_member_change_num, tvb, offset, 4, ENC_BIG_ENDIAN);
+ EAT(4);
+
+ new_length=dissect_wccp2_assignment_key_element(tvb, offset, length, pinfo, info_tree, addr_table);
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ n_routers = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(info_tree, hf_router_router_num, tvb, offset, 4, n_routers);
+ EAT(4);
+
+ for (i = 0; i < n_routers; i++) {
+ if (length < 4)
+ return length - (n_routers-i)*4 - 4;
+
+ wccp_add_ipaddress_item(info_tree, hf_router_view_ip_index, hf_router_view_ipv4, hf_router_view_ipv6, tvb, offset, 4, addr_table);
+ EAT(4);
+ }
+
+ if (length < 4)
+ return length - 4;
+
+ n_web_caches = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(info_tree, hf_wc_view_wc_num, tvb, offset, 4, n_web_caches);
+ EAT(4);
+
+ for (i = 0; i < n_web_caches; i++) {
+ gint old_length;
+ old_length = length;
+
+ if (length < 4)
+ return length - 4*(n_web_caches-i);
+
+ te = wccp_add_ipaddress_item(info_tree, hf_router_query_info_ip_index, hf_router_query_info_ipv4, hf_router_query_info_ipv6, tvb, offset, 4, addr_table);
+
+ element_tree = proto_item_add_subtree(te, ett_wc_identity_element);
+ length = dissect_wccp2_web_cache_identity_element(tvb,
+ offset, length, pinfo,
+ element_tree, addr_table);
+ if (length < 0)
+ return length;
+
+ offset += old_length - length;
+ }
+ return length;
+}
+
+#define WC_VIEW_INFO_MIN_LEN (4+4+4)
+
+/* 5.2.2 Web Cache View Info Component */
+
+static gint
+dissect_wccp2_web_cache_view_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint32 n_routers;
+ guint32 n_web_caches;
+ guint i;
+ proto_item *te;
+ proto_tree *element_tree;
+
+
+ if (length < WC_VIEW_INFO_MIN_LEN)
+ return length - WC_VIEW_INFO_MIN_LEN;
+
+
+ proto_tree_add_item(info_tree, hf_wc_view_info_change_num, tvb, offset, 4, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(4,4);
+
+ n_routers = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(info_tree, hf_wc_view_router_num, tvb, offset, 4, n_routers);
+ EAT(4);
+
+ for (i = 0; i < n_routers; i++) {
+ if (length < 8)
+ return length -8 * (n_routers-i) - 4;
+
+ te = wccp_add_ipaddress_item(info_tree, hf_wc_view_info_router_ip_index, hf_wc_view_info_router_ipv4, hf_wc_view_info_router_ipv6, tvb, offset, 4, addr_table);
+ /* also include the receive id in the object */
+ proto_item_set_len(te, 8);
+
+ element_tree = proto_item_add_subtree(te,ett_wc_view_info_router_element);
+ dissect_wccp2_router_identity_element(tvb, offset, pinfo, element_tree, addr_table);
+ EAT(8);
+ }
+
+ if (length < 4)
+ return length - 4;
+
+ n_web_caches = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(info_tree, hf_wc_view_wc_num, tvb, offset, 4, n_web_caches);
+ EAT(4);
+
+ for (i = 0; i < n_web_caches; i++) {
+ if (length < 4)
+ return length - 4*(n_web_caches-i);
+
+ wccp_add_ipaddress_item(info_tree, hf_wc_view_info_wc_ip_index, hf_wc_view_info_wc_ipv4, hf_wc_view_info_wc_ipv6, tvb, offset, 4, addr_table);
+ EAT(4);
+ }
+ return length;
+}
+
+/* 6.2 Router Assignment Element */
+static void
+dissect_wccp2_router_assignment_element(tvbuff_t *tvb, int offset,
+ gint length _U_, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ dissect_wccp2_router_identity_element(tvb,offset,pinfo,info_tree, addr_table);
+ EAT(8);
+ proto_tree_add_item(info_tree, hf_router_assignment_element_change_num, tvb, offset, 4, ENC_BIG_ENDIAN);
+ EAT(4);
+}
+
+static const gchar *
+assignment_bucket_name(guint8 bucket)
+{
+ const gchar *cur;
+
+ if (bucket == 0xff) {
+ cur= "Unassigned";
+ } else {
+ cur=wmem_strdup_printf(wmem_packet_scope(), "%u%s", bucket & 0x7F,
+ (bucket & 0x80) ? " (Alt)" : "");
+ }
+ return cur;
+}
+
+#define ASSIGNMENT_INFO_MIN_LEN (8+4+4)
+
+/* 5.4.1 Assignment Info Component */
+static gint
+dissect_wccp2_assignment_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint32 n_routers;
+ guint i;
+ proto_item *te;
+ proto_tree *element_tree;
+ gint new_length;
+
+ if (length < ASSIGNMENT_INFO_MIN_LEN)
+ return length - ASSIGNMENT_INFO_MIN_LEN;
+
+
+ new_length=dissect_wccp2_assignment_key_element(tvb, offset, length, pinfo, info_tree, addr_table);
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ n_routers = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(info_tree, hf_assignment_info_router_num, tvb, offset, 4, n_routers);
+ EAT(4);
+
+ for (i = 0; i < n_routers; i++) {
+ if (length < 12)
+ return length - 12*(n_routers-i)-4-256;
+
+ te = wccp_add_ipaddress_item(info_tree, hf_assignment_info_router_ip_index, hf_assignment_info_router_ipv4, hf_assignment_info_router_ipv6, tvb, offset, 4, addr_table);
+
+ element_tree = proto_item_add_subtree(te, ett_router_assignment_element);
+ dissect_wccp2_router_assignment_element(tvb, offset, length , pinfo,
+ element_tree, addr_table);
+ EAT(12);
+ }
+
+ new_length = dissect_wccp2_hash_buckets_assignment_element(tvb, offset, length, pinfo, info_tree, addr_table);
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+ return length;
+}
+
+
+#define QUERY_INFO_LEN (4+4+4+4)
+
+/* 5.5.1 Router Query Info Component */
+static gboolean
+dissect_wccp2_router_query_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ if (length < QUERY_INFO_LEN)
+ return length - QUERY_INFO_LEN;
+
+ dissect_wccp2_router_identity_element(tvb,offset,pinfo,info_tree, addr_table);
+ EAT_AND_CHECK(8,4);
+
+ wccp_add_ipaddress_item(info_tree, hf_router_query_info_send_to_ip_index, hf_router_query_info_send_to_ipv4, hf_router_query_info_send_to_ipv6, tvb, offset, 4, addr_table);
+ EAT_AND_CHECK(4,4);
+ wccp_add_ipaddress_item(info_tree, hf_router_query_info_target_ip_index, hf_router_query_info_target_ipv4, hf_router_query_info_target_ipv6, tvb, offset, 4, addr_table);
+ EAT(4);
+
+ return length;
+}
+
+/* 6.5 Hash Buckets Assignment Element */
+static gint dissect_wccp2_hash_buckets_assignment_element(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo _U_, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint32 i,n_web_caches;
+ proto_item *te;
+ proto_tree *element_tree;
+ guint8 bucket;
+
+ if (length < 4)
+ return length - 4;
+
+ te = proto_tree_add_item_ret_uint(info_tree, hf_hash_buckets_assignment_wc_num, tvb, offset, 4, ENC_BIG_ENDIAN, &n_web_caches);
+ EAT(4);
+
+ element_tree = proto_item_add_subtree(te,ett_hash_buckets_assignment_wc_element);
+ for (i = 0; i < n_web_caches; i++) {
+ proto_item *l_te;
+
+ if (length < 4)
+ return length - 4*(n_web_caches-i)-256;
+
+ l_te = wccp_add_ipaddress_item(element_tree, hf_hash_buckets_assignment_wc_ip_index, hf_hash_buckets_assignment_wc_ipv4, hf_hash_buckets_assignment_wc_ipv6, tvb, offset, 4, addr_table);
+
+ proto_item_append_text(l_te, " id: %d", i);
+ EAT(4);
+ }
+
+ element_tree = proto_tree_add_subtree(info_tree,tvb, offset, 256, ett_hash_buckets_assignment_buckets, NULL, "Buckets");
+
+ for (i = 0; i < 256; i++, offset++, length--) {
+ if (length < 1)
+ return length - (256-i);
+ bucket = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint_format(element_tree, hf_bucket, tvb, offset, 1,
+ bucket, "Bucket %3d: %10s",
+ i, assignment_bucket_name(bucket));
+ }
+ return length;
+}
+
+#define WCCP2_FORWARDING_METHOD_GRE 0x00000001
+#define WCCP2_FORWARDING_METHOD_L2 0x00000002
+
+static const capability_flag forwarding_method_flags[] = {
+ { WCCP2_FORWARDING_METHOD_GRE, "IP-GRE", &hf_capability_forwarding_method_flag_gre },
+ { WCCP2_FORWARDING_METHOD_L2, "L2", &hf_capability_forwarding_method_flag_l2 },
+ { 0, NULL, NULL }
+};
+
+#define WCCP2_ASSIGNMENT_METHOD_HASH 0x00000001
+#define WCCP2_ASSIGNMENT_METHOD_MASK 0x00000002
+
+static const capability_flag assignment_method_flags[] = {
+ { WCCP2_ASSIGNMENT_METHOD_HASH, "Hash", &hf_capability_assignment_method_flag_hash },
+ { WCCP2_ASSIGNMENT_METHOD_MASK, "Mask", &hf_capability_assignment_method_flag_mask },
+ { 0, NULL, NULL }
+};
+
+
+#define WCCP2_PACKET_RETURN_METHOD_GRE 0x00000001
+#define WCCP2_PACKET_RETURN_METHOD_L2 0x00000002
+
+static const capability_flag packet_return_method_flags[] = {
+ { WCCP2_PACKET_RETURN_METHOD_GRE, "IP-GRE", &hf_capability_return_method_flag_gre },
+ { WCCP2_PACKET_RETURN_METHOD_L2, "L2", &hf_capability_return_method_flag_l2 },
+ { 0, NULL, NULL }
+};
+
+#define WCCP2_COMMAND_TYPE_SHUTDOWN 1
+#define WCCP2_COMMAND_TYPE_SHUTDOWN_RESPONSE 2
+
+static const value_string wccp_command_type_vals[] = {
+ { WCCP2_COMMAND_TYPE_SHUTDOWN, "CE shutting down" },
+ { WCCP2_COMMAND_TYPE_SHUTDOWN_RESPONSE, "Router Acknowledge CE shutdown"},
+ { 0, NULL }
+};
+
+
+
+/* 5.1.3 Capabilities Info Component */
+
+static gint
+dissect_wccp2_capability_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table _U_)
+{
+ gint capability_length;
+
+ while (length >= 8) {
+ capability_length = dissect_wccp2_capability_element(tvb,offset,length,pinfo,info_tree);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(capability_length);
+ }
+ return length;
+}
+
+
+#define ALT_COMMAND_EXTENSION_MIN_LEN (4)
+
+/* 5.1.4 && 6.12 Command Extension Component */
+
+static gint
+dissect_wccp2_command_extension(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo _U_, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint16 command_type;
+ guint32 command_length;
+
+ for (;;) {
+ if (length == 0)
+ return length;
+
+ if (length < ALT_COMMAND_EXTENSION_MIN_LEN )
+ return length - ALT_COMMAND_EXTENSION_MIN_LEN ;
+
+ command_type = tvb_get_ntohs(tvb, offset);
+ proto_tree_add_item(info_tree, hf_command_element_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+
+ proto_tree_add_item_ret_uint(info_tree, hf_command_element_length, tvb, offset, 2, ENC_BIG_ENDIAN, &command_length);
+ proto_tree_add_item(info_tree, hf_command_length, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT(2);
+
+ if (((command_type == WCCP2_COMMAND_TYPE_SHUTDOWN) ||
+ (command_type == WCCP2_COMMAND_TYPE_SHUTDOWN_RESPONSE)) &&
+ (command_length == 4)) {
+ if (length < 4)
+ return length - 4;
+
+ wccp_add_ipaddress_item(info_tree, hf_command_element_shutdown_ip_index, hf_command_element_shutdown_ipv4, hf_command_element_shutdown_ipv6, tvb, offset, 4, addr_table);
+ } else {
+ if (length < (int)command_length)
+ return length - command_length;
+
+ proto_tree_add_item(info_tree, hf_command_unknown, tvb, offset, command_length, ENC_NA);
+ }
+ EAT(command_length);
+ }
+}
+
+
+/* 5.1.5 Address Table Component */
+/* this function is special as it can be invoked twice during a packet decode:
+ once to get the tables, once to display them
+*/
+static gint
+dissect_wccp2r1_address_table_info(tvbuff_t *tvb, int offset, int length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* wccp_wccp_address_table)
+{
+ guint16 address_length;
+ guint32 i;
+ gint16 family;
+ guint16 table_length;
+ proto_tree *element_tree;
+ proto_item *tf;
+
+ if (length < 2*4)
+ return length - 2*4;
+
+ family = tvb_get_ntohs(tvb, offset);
+ proto_tree_add_item(info_tree, hf_address_table_family, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+
+ address_length = tvb_get_ntohs(tvb, offset);
+ proto_tree_add_item(info_tree, hf_address_table_address_length, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+
+ table_length = tvb_get_ntohl(tvb, offset);
+ tf = proto_tree_add_item(info_tree, hf_address_table_length, tvb, offset, 4, ENC_BIG_ENDIAN);
+ element_tree = proto_item_add_subtree(tf, ett_table_element);
+ EAT(4);
+
+ if (wccp_wccp_address_table->in_use == FALSE) {
+ wccp_wccp_address_table->family = family;
+ wccp_wccp_address_table->table_length = table_length;
+
+ /* check if the length is valid and allocate the tables if needed */
+ switch (wccp_wccp_address_table->family) {
+ case 1:
+ if (wccp_wccp_address_table->table_ipv4 == NULL)
+ wccp_wccp_address_table->table_ipv4 = (guint32 *)
+ wmem_alloc0(pinfo->pool, wccp_wccp_address_table->table_length * 4);
+ if (address_length != 4) {
+ expert_add_info_format(pinfo, tf, &ei_wccp_length_bad,
+ "The Address length must be 4, but I found %d for IPv4 addresses. Correcting this.",
+ address_length);
+ address_length = 4;
+ }
+ break;
+ case 2:
+ if (wccp_wccp_address_table->table_ipv6 == NULL)
+ wccp_wccp_address_table->table_ipv6 = (ws_in6_addr *)
+ wmem_alloc0(pinfo->pool, wccp_wccp_address_table->table_length * sizeof(ws_in6_addr));
+ if (address_length != 16) {
+ expert_add_info_format(pinfo, tf, &ei_wccp_length_bad,
+ "The Address length must be 16, but I found %d for IPv6 addresses. Correcting this.",
+ address_length);
+ address_length = 16;
+ }
+ break;
+ default:
+ expert_add_info_format(pinfo, tf, &ei_wccp_address_table_family_unknown,
+ "Unknown address family: %d", wccp_wccp_address_table->family);
+ };
+ }
+
+ /* now read the addresses and print/store them */
+
+ for(i=0; i<table_length; i++) {
+ const gchar *addr;
+
+ switch (family) {
+ case 1:
+ /* IPv4 */
+ addr = tvb_ip_to_str(pinfo->pool, tvb, offset);
+ if ((wccp_wccp_address_table->in_use == FALSE) &&
+ (wccp_wccp_address_table->table_ipv4 != NULL) &&
+ (i < wccp_wccp_address_table->table_length))
+ wccp_wccp_address_table->table_ipv4[i] = tvb_get_ipv4(tvb, offset);
+ break;
+ case 2:
+ /* IPv6 */
+ addr = tvb_ip6_to_str(pinfo->pool, tvb, offset);
+ if ((wccp_wccp_address_table->in_use == FALSE) &&
+ (wccp_wccp_address_table->table_ipv6 != NULL) &&
+ (i < wccp_wccp_address_table->table_length))
+ tvb_get_ipv6(tvb, offset, &(wccp_wccp_address_table->table_ipv6[i]));
+ break;
+ default:
+ addr = wmem_strdup_printf(wmem_packet_scope(), "unknown family %d", wccp_wccp_address_table->family);
+ };
+
+ if (element_tree) {
+ proto_item *pi;
+
+ pi = proto_tree_add_string_format_value(element_tree, hf_address_table_element, tvb,
+ offset, address_length, addr,
+ "%d: %s", i+1, addr);
+ if (i > wccp_wccp_address_table->table_length)
+ expert_add_info_format(pinfo, pi, &ei_wccp_length_bad, "Ran out of space to store address");
+ }
+ EAT(address_length);
+ }
+
+ wccp_wccp_address_table->in_use = TRUE;
+ return length;
+}
+
+
+
+
+
+#define HASH_ASSIGNMENT_INFO_MIN_LEN (4+256)
+
+/* part of 5.6.11 Alternate Assignment Component */
+static gint
+dissect_wccp2_hash_assignment_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint32 n_web_caches, host_addr;
+ guint i;
+ guint8 bucket;
+
+ if (length < HASH_ASSIGNMENT_INFO_MIN_LEN)
+ return length - ASSIGNMENT_INFO_MIN_LEN;
+
+ proto_tree_add_item_ret_uint(info_tree, hf_wc_view_wc_num, tvb, offset, 4, ENC_BIG_ENDIAN, &n_web_caches);
+ EAT(4);
+
+ for (i = 0; i < n_web_caches; i++) {
+ if (length < 4)
+ return length - 4*(n_web_caches-i)-256;
+
+ host_addr = tvb_get_ntohl(tvb,offset);
+ if (! addr_table->in_use){
+ proto_tree_add_ipv4_format(info_tree, hf_cache_ip, tvb, offset, 4, host_addr, "Web-Cache %d: IP address %s", i,
+ decode_wccp_encoded_address(tvb, offset, pinfo, info_tree, addr_table));
+ } else {
+ proto_tree_add_uint_format(info_tree, hf_web_cache_identity_index, tvb, offset, 4, host_addr, "Web-Cache %d: IP address %s", i,
+ decode_wccp_encoded_address(tvb, offset, pinfo, info_tree, addr_table));
+ }
+ EAT(4);
+ }
+
+
+ for (i = 0; i < 256; i++, offset++, length--) {
+ if (length < 1)
+ return length - (256-i);
+ bucket = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint_format(info_tree, hf_bucket, tvb, offset, 1,
+ bucket, "Bucket %3d: %10s",
+ i, assignment_bucket_name(bucket));
+ }
+ return length;
+}
+
+/* 5.3.3 Assignment Map Component */
+static gint dissect_wccp2_assignment_map(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ gint new_length;
+
+ new_length=dissect_wccp2_mask_value_set_list(tvb, offset, length, pinfo, info_tree, addr_table);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ return length;
+}
+
+
+
+#define ALT_ASSIGNMENT_MAP_MIN_LEN (4)
+
+/* 5.3.4 Alternate Assignment Map Component */
+static gint
+dissect_wccp2r1_alt_assignment_map_info(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint16 assignment_type;
+ guint16 assignment_length;
+ proto_item *tf=NULL;
+
+ if (length < ALT_ASSIGNMENT_MAP_MIN_LEN )
+ return length - ALT_ASSIGNMENT_MAP_MIN_LEN ;
+
+
+ assignment_type = tvb_get_ntohs(tvb, offset);
+ proto_tree_add_item(info_tree, hf_alt_assignment_map_assignment_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+
+ assignment_length = tvb_get_ntohs(tvb, offset);
+ tf=proto_tree_add_item(info_tree, hf_alt_assignment_map_assignment_length, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT(2);
+
+ if (length < assignment_length)
+ expert_add_info_format(pinfo, tf, &ei_wccp_assignment_length_bad,
+ "Assignment length is %d but only %d remain in the packet. Ignoring this for now",
+ assignment_length, length);
+
+ if (length > assignment_length) {
+ expert_add_info_format(pinfo, tf, &ei_wccp_assignment_length_bad,
+ "Assignment length is %d but %d remain in the packet. Assuming that the assignment length is wrong and setting it to %d.",
+ assignment_length, length, length);
+ assignment_length = length;
+ }
+
+ switch (assignment_type) {
+ case WCCP2_HASH_ASSIGNMENT_TYPE:
+ return dissect_wccp2_assignment_info(tvb, offset, assignment_length,
+ pinfo, info_tree, addr_table);
+ case WCCP2_MASK_ASSIGNMENT_TYPE:
+ return dissect_wccp2_mask_value_set_list(tvb, offset, assignment_length,
+ pinfo, info_tree, addr_table);
+ case WCCP2r1_ALT_MASK_ASSIGNMENT_TYPE:
+ return dissect_wccp2_alternate_mask_value_set_list(tvb, offset, assignment_length,
+ pinfo, info_tree, addr_table);
+ default:
+ return length;
+ }
+}
+
+
+
+
+
+/* 6.6 Hash Assignment Data Element */
+static gint
+dissect_wccp2_hash_assignment_data_element(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo _U_,
+ proto_tree *info_tree)
+
+{
+ proto_tree *bucket_tree;
+ int i;
+ guint8 bucket_info;
+ int n;
+
+
+ bucket_tree = proto_tree_add_subtree(info_tree, tvb, offset, 8*4,
+ ett_hash_assignment_buckets, NULL, "Hash Assignment Data");
+
+ for (i = 0, n = 0; i < 32; i++) {
+ if (length == 0) {
+ return -i-2-2;
+ }
+
+ bucket_info = tvb_get_guint8(tvb, offset);
+ n = wccp_bucket_info(bucket_info, bucket_tree, n, tvb, offset);
+ EAT(1);
+ }
+
+ if (length < 2){
+ return -2-2;
+ }
+
+ return dissect_wccp2_assignment_weight_and_status_element(tvb, offset, length, pinfo, info_tree);
+}
+
+/* 6.7 Mask Assignment Data Element */
+static gint
+dissect_wccp2_mask_assignment_data_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table)
+
+{
+ proto_item *mask_item;
+ proto_tree *mask_tree;
+ gint new_length,start;
+
+
+ mask_tree = proto_tree_add_subtree(info_tree, tvb, offset, 4,
+ ett_mask_assignment_data_element, &mask_item, "Mask Assignment Data");
+ start = offset;
+
+ new_length=dissect_wccp2_mask_value_set_list(tvb, offset, length, pinfo, mask_tree, addr_table);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ if (length < 2)
+ return length-4;
+
+ new_length = dissect_wccp2_assignment_weight_and_status_element(tvb, offset, length, pinfo, info_tree);
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ proto_item_set_len(mask_item, offset-start);
+ return length;
+}
+
+
+/* 5.7.5 Alternate Mask Assignment Data Element */
+static gint
+dissect_wccp2_alternate_mask_assignment_data_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_tree *mask_tree;
+
+ mask_tree = proto_tree_add_subtree(info_tree, tvb, offset, length,
+ ett_alternate_mask_assignment_data_element, NULL, "Alternate Mask Assignment Data");
+
+ if (length < 4)
+ return length-4;
+
+ if (length > 4)
+ for (;length >4;)
+ {
+ gint new_length;
+
+ new_length=dissect_wccp2_alternate_mask_value_set_list(tvb, offset, length, pinfo, mask_tree, addr_table);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+ }
+
+ if (length < 2)
+ return -2;
+
+ return dissect_wccp2_assignment_weight_and_status_element(tvb, offset, length, pinfo, info_tree);
+}
+
+
+/* 6.9 Assignment Weight and Status Data Element */
+static gint
+dissect_wccp2_assignment_weight_and_status_element(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo _U_,
+ proto_tree *info_tree)
+
+{
+ if (length < 4)
+ return length - 4;
+
+
+ proto_tree_add_item(info_tree, hf_assignment_weight, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+ proto_tree_add_item(info_tree, hf_assignment_status, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT(2);
+ return length;
+}
+
+
+/* 6.10 Extended Assignment Data Element */
+static gint
+dissect_wccp2_extended_assignment_data_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_item *element_item, *header;
+ proto_tree *item_tree;
+
+ guint type_of_assignment;
+
+ gint assignment_length;
+
+ if (length < 4)
+ return length-4;
+
+
+ item_tree = proto_tree_add_subtree(info_tree, tvb, offset, length,
+ ett_extended_assigment_data_element, &header, "Extended Assignment Data Element");
+
+ type_of_assignment = tvb_get_ntohs(tvb, offset);
+ proto_tree_add_item(item_tree, hf_extended_assignment_data_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+
+ assignment_length = tvb_get_ntohs(tvb,offset);
+ element_item = proto_tree_add_item(item_tree, hf_extended_assignment_data_length, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT(2);
+
+ if (length < assignment_length)
+ expert_add_info_format(pinfo, element_item, &ei_wccp_assignment_length_bad,
+ "Assignment length is %d but only %d remain in the packet. Ignoring this for now",
+ assignment_length, length);
+
+ /* Now a common bug seems to be to set the assignment_length to the length -4
+ check for this */
+ if ((length > assignment_length) &&
+ (length == (assignment_length + 4)))
+ {
+ expert_add_info_format(pinfo, element_item, &ei_wccp_assignment_length_bad,
+ "Assignment length is %d but %d remain in the packet. Assuming that this is wrong as this is only 4 bytes too small, proceeding with the assumption it is %d",
+ assignment_length, length, length);
+ assignment_length = length;
+ }
+
+
+ proto_item_set_len(header, assignment_length+4);
+
+ switch (type_of_assignment)
+ {
+ case WCCP2_HASH_ASSIGNMENT_TYPE:
+ dissect_wccp2_hash_assignment_data_element(tvb, offset, assignment_length,
+ pinfo, item_tree);
+ return length - assignment_length;
+ case WCCP2_MASK_ASSIGNMENT_TYPE:
+ dissect_wccp2_mask_assignment_data_element(tvb, offset, assignment_length,
+ pinfo, item_tree, addr_table);
+ return length - assignment_length;
+ case WCCP2r1_ALT_MASK_ASSIGNMENT_TYPE:
+ dissect_wccp2_alternate_mask_assignment_data_element(tvb, offset, assignment_length,
+ pinfo, item_tree, addr_table);
+ return length - assignment_length;
+ case WCCP2r1_ASSIGNMENT_WEIGHT_STATUS:
+ dissect_wccp2_assignment_weight_and_status_element(tvb, offset, assignment_length,
+ pinfo, item_tree);
+ return length - assignment_length;
+ }
+ return length;
+}
+
+
+
+
+
+
+/* 6.11 Capability Element */
+static gint
+dissect_wccp2_capability_element(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree)
+{
+ guint16 capability_type;
+ guint16 capability_val_len;
+ proto_item *te, *header, *tf;
+ proto_tree *element_tree;
+
+ if (length < 4)
+ return length - 4;
+
+ capability_type = tvb_get_ntohs(tvb, offset);
+ element_tree = proto_tree_add_subtree_format(info_tree, tvb, offset, -1, ett_capability_element, &te,
+ "Type: %s",
+ val_to_str(capability_type,
+ capability_type_vals,
+ "Unknown (0x%08X)"));
+ header = te;
+
+ proto_tree_add_item(element_tree, hf_capability_element_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+
+ capability_val_len = tvb_get_ntohs(tvb, offset+2);
+ tf = proto_tree_add_uint(element_tree, hf_capability_element_length, tvb, offset+2, 2, capability_val_len);
+ proto_item_set_len(te, capability_val_len + 4);
+
+ if (length < (4+capability_val_len))
+ return length - (4 + capability_val_len);
+
+ switch (capability_type) {
+ case WCCP2_FORWARDING_METHOD:
+ dissect_32_bit_capability_flags(tvb, offset,
+ capability_val_len,
+ ett_capability_forwarding_method,
+ forwarding_method_flags, element_tree,
+ header, tf, pinfo);
+ break;
+
+ case WCCP2_ASSIGNMENT_METHOD:
+ dissect_32_bit_capability_flags(tvb, offset,
+ capability_val_len,
+ ett_capability_assignment_method,
+ assignment_method_flags, element_tree,
+ header, tf, pinfo);
+ break;
+
+ case WCCP2_PACKET_RETURN_METHOD:
+ dissect_32_bit_capability_flags(tvb, offset,
+ capability_val_len,
+ ett_capability_return_method,
+ packet_return_method_flags, element_tree,
+ header, tf, pinfo);
+ break;
+
+ case WCCP2_TRANSMIT_T:
+ dissect_transmit_t_capability(tvb, te, offset,
+ capability_val_len,
+ ett_capability_transmit_t, element_tree,
+ tf, pinfo);
+ break;
+
+ case WCCP2_TIMER_SCALE:
+ dissect_timer_scale_capability(tvb, offset,
+ capability_val_len,
+ ett_capability_timer_scale, element_tree,
+ tf, pinfo);
+ break;
+ default:
+ proto_tree_add_item(element_tree, hf_capability_value, tvb, offset, capability_val_len, ENC_NA);
+ break;
+ }
+ return length - 4 - capability_val_len;
+}
+
+
+/* 6.13 Mask/Value Set List */
+static gint
+dissect_wccp2_mask_value_set_list(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint num_of_elem;
+ guint i;
+ proto_item *te;
+ proto_tree *element_tree;
+ guint start;
+
+
+ if (length < 4)
+ return length - 4;
+
+ element_tree = proto_tree_add_subtree(info_tree, tvb, offset, 4, ett_mv_set_list, &te, "Mask/Value Set List");
+ start = offset;
+
+
+ num_of_elem = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_item(element_tree, hf_mask_value_set_list_num_elements,
+ tvb, offset, 4, ENC_BIG_ENDIAN);
+ /* proto_tree_add_uint(element_tree, , tvb, offset, 4, num_of_elem); */
+ EAT(4);
+
+ for (i = 0; i < num_of_elem; i++)
+ {
+ gint new_length;
+
+ new_length=dissect_wccp2_mask_value_set_element(tvb, offset, length, i, pinfo, element_tree, addr_table);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+ }
+
+ proto_item_set_len(te, offset-start);
+ return length;
+}
+
+
+
+
+
+/* 6.15 Mask Element */
+static gint
+dissect_wccp2_mask_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo _U_, proto_tree *info_tree)
+{
+ if (length < 2)
+ return length-12;
+
+ proto_tree_add_item(info_tree, hf_mask_element_src_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(4,4);
+ proto_tree_add_item(info_tree, hf_mask_element_dest_ip, tvb, offset, 4, ENC_BIG_ENDIAN);
+
+ EAT_AND_CHECK(4,2);
+ proto_tree_add_item(info_tree, hf_mask_element_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+ proto_tree_add_item(info_tree, hf_mask_element_dest_port, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT(2);
+
+ return length;
+}
+
+
+
+
+
+
+/* 6.17 Alternate Mask/Value Set List */
+static gint dissect_wccp2_alternate_mask_value_set_list(tvbuff_t *tvb, int offset,
+ int length, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_tree *list_tree;
+ guint num_of_val_elements;
+ guint i;
+
+ if (length < 4)
+ return length - 4;
+
+ list_tree = proto_tree_add_subtree(info_tree, tvb, offset, length,
+ ett_alternate_mask_value_set, NULL, "Alternate Mask/Value Set List");
+
+ num_of_val_elements = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(list_tree, hf_alt_assignment_mask_value_set_list_num_elements, tvb, offset, 4, num_of_val_elements);
+ EAT(4);
+
+ for(i=0;i<num_of_val_elements;i++) {
+ gint new_length;
+
+ new_length=dissect_wccp2_alternate_mask_value_set_element(tvb, offset, length, i, pinfo, list_tree, addr_table);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+ }
+ return length;
+}
+
+
+/* 6.18 Alternate Mask/Value Set Element */
+static gint
+dissect_wccp2_alternate_mask_value_set_element(tvbuff_t *tvb, int offset, gint length, guint el_index, packet_info *pinfo,
+ proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_item *tl, *header;
+ proto_tree *element_tree, *value_tree;
+ guint number_of_elements;
+ gint new_length, total_length;
+ guint i;
+
+ element_tree = proto_tree_add_subtree_format(info_tree, tvb, offset, 0,
+ ett_alternate_mask_value_set_element, &header,
+ "Alternate Mask/Value Set Element(%d)", el_index);
+
+ total_length = 0;
+
+ new_length=dissect_wccp2_mask_element(tvb,offset,length,pinfo,element_tree);
+ total_length += length - new_length;
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ if (length < 4)
+ return length - 4;
+
+ number_of_elements = tvb_get_ntohl(tvb, offset);
+ tl = proto_tree_add_uint(element_tree, hf_alt_assignment_mask_value_set_element_num_wc_value_elements, tvb, offset, 4, number_of_elements);
+ value_tree = proto_item_add_subtree(tl, ett_alternate_mv_set_element_list);
+ total_length += 4;
+ EAT(4);
+
+ /* XXX Add a bounds check for number_of_elements? */
+ for (i=0; i < number_of_elements; i++) {
+ new_length=dissect_wccp2_web_cache_value_element(tvb, offset, length, pinfo, value_tree, addr_table);
+ total_length += length - new_length;
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+ }
+ proto_item_set_len(header, total_length);
+
+ return length;
+}
+
+/* 6.19 Web-Cache Value Element */
+static gint
+dissect_wccp2_web_cache_value_element(tvbuff_t *tvb, int offset, gint length, packet_info *pinfo _U_, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint number_of_elements, seq_num;
+ proto_item *tl;
+ proto_tree *element_tree;
+ guint i;
+
+ if (length < 4)
+ return length - 8;
+
+ tl = wccp_add_ipaddress_item(info_tree, hf_web_cache_value_element_wc_address_index, hf_web_cache_value_element_wc_address_ipv4, hf_web_cache_value_element_wc_address_ipv6, tvb, offset, 4, addr_table);
+
+ element_tree = proto_item_add_subtree(tl, ett_web_cache_value_element_list);
+ EAT_AND_CHECK(4,4);
+
+ number_of_elements = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(element_tree, hf_web_cache_value_element_num_values, tvb, offset, 4, number_of_elements);
+ EAT(4);
+
+ for (i=0; i < number_of_elements; i++) {
+ if (length < 4)
+ return length - 4*(number_of_elements-i);
+
+ seq_num = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint_format(element_tree, hf_web_cache_value_seq_num, tvb, offset, 4,
+ seq_num, "Value Sequence Number %d: %x", i+1, seq_num);
+ EAT(4);
+ }
+
+ return length;
+}
+
+
+/* End of standard functions */
+
+
+static void
+dissect_32_bit_capability_flags(tvbuff_t *tvb, int curr_offset,
+ guint16 capability_val_len, gint ett, const capability_flag *flags,
+ proto_tree *element_tree, proto_item *header,
+ proto_item *length_item, packet_info *pinfo)
+{
+ guint32 capability_val;
+ proto_item *tm;
+ proto_tree *method_tree;
+ int i;
+ gboolean first = TRUE;
+
+ if (capability_val_len != 4) {
+ expert_add_info_format(pinfo, length_item, &ei_wccp_capability_element_length,
+ "Value Length: %u (illegal, must be == 4)", capability_val_len);
+ return;
+ }
+
+ capability_val = tvb_get_ntohl(tvb, curr_offset + 4);
+ tm = proto_tree_add_uint(element_tree, hf_capability_info_value, tvb, curr_offset + 4, 4, capability_val);
+
+ for (i = 0; flags[i].short_name != NULL; i++) {
+ if (capability_val & flags[i].value) {
+ if (first) {
+ proto_item_append_text( tm, " (%s", flags[i].short_name);
+ proto_item_append_text( header, " (%s", flags[i].short_name);
+ first = FALSE;
+ } else {
+ proto_item_append_text( tm, ", %s", flags[i].short_name);
+ proto_item_append_text( header, " (%s", flags[i].short_name);
+ }
+ }
+ }
+
+ if (first == FALSE) {
+ proto_item_append_text( tm, ")");
+ proto_item_append_text( header, ")");
+ }
+
+ method_tree = proto_item_add_subtree(tm, ett);
+ for (i = 0; flags[i].phf != NULL; i++)
+ proto_tree_add_item(method_tree, *(flags[i].phf), tvb, curr_offset+4, 4, ENC_BIG_ENDIAN);
+}
+
+
+
+/* 6.11.4 Capability Type WCCP2_TRANSMIT_T */
+static void
+dissect_transmit_t_capability(tvbuff_t *tvb, proto_item *te, int curr_offset,
+ guint16 capability_val_len, gint ett, proto_tree *element_tree,
+ proto_item *length_item, packet_info *pinfo)
+{
+ guint16 upper_limit, lower_limit;
+ proto_tree *method_tree;
+
+ if (capability_val_len != 4) {
+ expert_add_info_format(pinfo, length_item, &ei_wccp_capability_element_length,
+ "Value Length: %u (illegal, must be == 4)", capability_val_len);
+ return;
+ }
+
+ upper_limit = tvb_get_ntohs(tvb, curr_offset);
+ lower_limit = tvb_get_ntohs(tvb, curr_offset + 2);
+
+ if ( upper_limit == 0) {
+ method_tree = proto_tree_add_subtree(element_tree, tvb, curr_offset, 2,
+ ett, NULL, "Only accepting one value");
+ proto_tree_add_uint(method_tree, hf_reserved_zero, tvb, curr_offset, 2, upper_limit);
+
+ proto_tree_add_item(method_tree, hf_capability_transmit_t , tvb, curr_offset+2, 2, ENC_BIG_ENDIAN);
+ proto_item_append_text(te, " %d ms", lower_limit);
+ } else {
+ method_tree = proto_tree_add_subtree(element_tree, tvb, curr_offset, 2,
+ ett, NULL, "Accepting a range");
+ proto_tree_add_item(method_tree, hf_capability_transmit_t_upper_limit,
+ tvb, curr_offset, 2, ENC_BIG_ENDIAN);
+
+ proto_tree_add_item(method_tree, hf_capability_transmit_t_lower_limit,
+ tvb, curr_offset+2, 2, ENC_BIG_ENDIAN);
+ proto_item_append_text(te, " < %d ms > %d ms", lower_limit, upper_limit);
+ }
+}
+
+
+static void
+dissect_timer_scale_capability(tvbuff_t *tvb, int curr_offset,
+ guint16 capability_val_len, gint ett, proto_tree *element_tree,
+ proto_item *length_item, packet_info *pinfo)
+{
+ guint8 a,c;
+ proto_tree *method_tree;
+
+ if (capability_val_len != 4) {
+ expert_add_info_format(pinfo, length_item, &ei_wccp_capability_element_length,
+ "Value Length: %u (illegal, must be == 4)", capability_val_len);
+ return;
+ }
+
+ a = tvb_get_guint8(tvb, curr_offset);
+ c = tvb_get_guint8(tvb, curr_offset+2);
+
+ if ( a == 0) {
+ if ( c == 0) {
+ method_tree = proto_tree_add_subtree(element_tree, tvb, curr_offset, 2,
+ ett, NULL, "Only accepting one value");
+
+ proto_tree_add_uint(method_tree, hf_reserved_zero, tvb, curr_offset, 1, a);
+
+ proto_tree_add_item(method_tree, hf_capability_timer_scale_timeout_scale,
+ tvb, curr_offset+1, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_uint(method_tree, hf_reserved_zero, tvb, curr_offset+2, 1, c);
+ proto_tree_add_item(method_tree, hf_capability_timer_scale_ra_timer_scale,
+ tvb, curr_offset+3, 1, ENC_BIG_ENDIAN);
+ } else {
+ proto_tree_add_expert(element_tree, pinfo, &ei_wccp_a_zero_not_c, tvb, curr_offset, 1);
+ }
+ } else {
+ if ( c == 0) {
+ proto_tree_add_expert(element_tree, pinfo, &ei_wccp_a_zero_not_c, tvb, curr_offset, 1);
+ } else {
+ method_tree = proto_tree_add_subtree(element_tree, tvb, curr_offset, 2,
+ ett, NULL, "Accepting a range");
+ proto_tree_add_item(method_tree, hf_capability_timer_scale_timeout_scale_upper_limit,
+ tvb, curr_offset, 1, ENC_BIG_ENDIAN);
+
+ proto_tree_add_item(method_tree, hf_capability_timer_scale_timeout_scale_lower_limit,
+ tvb, curr_offset+1, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(method_tree, hf_capability_timer_scale_ra_scale_upper_limit,
+ tvb, curr_offset+2, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(method_tree, hf_capability_timer_scale_ra_scale_lower_limit,
+ tvb, curr_offset+3, 1, ENC_BIG_ENDIAN);
+ }
+ }
+}
+
+
+/* 6.16 Value Element */
+static gint
+dissect_wccp2_value_element(tvbuff_t *tvb, int offset, gint length, int idx, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_tree *element_tree;
+
+ if (length < 4)
+ return length - 16;
+
+ element_tree = proto_tree_add_subtree_format(info_tree, tvb, offset, 16, ett_value_element, NULL, "Value Element(%u) %s",
+ idx,decode_wccp_encoded_address(tvb, offset+4+4+2+2, pinfo, info_tree, addr_table));
+
+
+ wccp_add_ipaddress_item(info_tree, hf_value_element_src_ip_index, hf_value_element_src_ipv4, hf_value_element_src_ipv6, tvb, offset, 4, addr_table);
+ EAT_AND_CHECK(4,4);
+ wccp_add_ipaddress_item(info_tree, hf_value_element_dest_ip_index, hf_value_element_dest_ipv4, hf_value_element_dest_ipv6, tvb, offset, 4, addr_table);
+
+ EAT_AND_CHECK(4,2);
+ proto_tree_add_item(element_tree, hf_value_element_src_port, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+ proto_tree_add_item(element_tree, hf_value_element_dest_port, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,4);
+
+ wccp_add_ipaddress_item(info_tree, hf_value_element_web_cache_ip_index, hf_value_element_web_cache_ipv4, hf_value_element_web_cache_ipv6, tvb, offset, 4, addr_table);
+ EAT(4);
+
+ return length;
+}
+
+
+/* 6.14 Mask/Value Set Element */
+static gint
+dissect_wccp2_mask_value_set_element(tvbuff_t *tvb, int offset, gint length, int idx, packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ proto_item *tl, *te;
+ proto_tree *element_tree, *value_tree;
+ guint num_of_val_elements;
+ guint i;
+ gint new_length;
+
+ element_tree = proto_tree_add_subtree_format(info_tree, tvb, offset, 0,
+ ett_mv_set_element, &tl, "Mask/Value Set Element(%d)", idx);
+
+ new_length = dissect_wccp2_mask_element(tvb,offset,length,pinfo,element_tree);
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ if (length < 4)
+ return length-4;
+
+ num_of_val_elements = tvb_get_ntohl(tvb, offset);
+ te = proto_tree_add_uint(element_tree, hf_mask_value_set_element_value_element_num, tvb, offset, 4, num_of_val_elements);
+
+ value_tree = proto_item_add_subtree(te, ett_mv_set_value_list);
+ EAT(4);
+
+ for (i = 0; i < num_of_val_elements; i++)
+ {
+ new_length=dissect_wccp2_value_element(tvb, offset, length, i, pinfo, value_tree, addr_table);
+
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+ }
+
+ proto_item_set_len(tl, 16+num_of_val_elements*16);
+
+ return length;
+}
+
+#define ALT_ASSIGNMENT_INFO_MIN_LEN (4+4)
+
+/* 5.4.2 Alternate Assignment Component */
+static gint
+dissect_wccp2_alternate_assignment_info(tvbuff_t *tvb, int offset, gint length,
+ packet_info *pinfo, proto_tree *info_tree, wccp_address_table* addr_table)
+{
+ guint16 assignment_type;
+ guint16 assignment_length;
+ proto_item *tf=NULL;
+
+ guint32 n_routers;
+ guint i;
+ proto_tree *element_tree;
+ gint new_length;
+
+
+ if (length < ALT_ASSIGNMENT_INFO_MIN_LEN)
+ return length - ALT_ASSIGNMENT_INFO_MIN_LEN;
+
+
+ assignment_type = tvb_get_ntohs(tvb, offset);
+ proto_tree_add_item(info_tree, hf_alt_assignment_info_assignment_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT_AND_CHECK(2,2);
+
+ assignment_length = tvb_get_ntohs(tvb, offset);
+ tf=proto_tree_add_item(info_tree, hf_alt_assignment_info_assignment_length, tvb, offset, 2, ENC_BIG_ENDIAN);
+ EAT(2);
+
+ if (length < assignment_length)
+ expert_add_info_format(pinfo, tf, &ei_wccp_assignment_length_bad,
+ "Assignment length is %d but only %d remain in the packet. Ignoring this for now",
+ assignment_length, length);
+
+ if (length > assignment_length) {
+ expert_add_info_format(pinfo, tf, &ei_wccp_assignment_length_bad,
+ "Assignment length is %d but %d remain in the packet. Assuming that the assignment length is wrong and setting it to %d.",
+ assignment_length, length, length);
+ }
+
+ new_length=dissect_wccp2_assignment_key_element(tvb, offset, length, pinfo, info_tree, addr_table);
+ CHECK_LENGTH_ADVANCE_OFFSET(new_length);
+
+ n_routers = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(info_tree, hf_alt_assignment_info_num_routers, tvb, offset, 4, n_routers);
+ EAT(4);
+
+ for (i = 0; i < n_routers; i++) {
+ if (length < 12)
+ return length - 12*(n_routers-i);
+
+ element_tree = proto_tree_add_subtree_format(info_tree, tvb, offset, 12,
+ ett_router_alt_assignment_element, NULL,
+ "Router %d Assignment Element: IP address %s", i,
+ decode_wccp_encoded_address(tvb, offset, pinfo, info_tree, addr_table));
+
+ dissect_wccp2_router_assignment_element(tvb, offset, length , pinfo, element_tree, addr_table);
+ EAT(12);
+ }
+
+ switch (assignment_type) {
+ case WCCP2_HASH_ASSIGNMENT_TYPE:
+ return dissect_wccp2_hash_assignment_info(tvb, offset, length,
+ pinfo, info_tree, addr_table);
+ case WCCP2_MASK_ASSIGNMENT_TYPE:
+ return dissect_wccp2_mask_value_set_list(tvb, offset, length,
+ pinfo, info_tree, addr_table);
+ case WCCP2r1_ALT_MASK_ASSIGNMENT_TYPE:
+ return dissect_wccp2_alternate_mask_value_set_list(tvb, offset, length,
+ pinfo, info_tree, addr_table);
+ default:
+ return length;
+ }
+}
+
+static void
+dissect_wccp2_info(tvbuff_t *tvb, int offset,
+ packet_info *pinfo, proto_tree *wccp_tree,
+ guint32 message_type)
+{
+ guint16 type;
+ guint16 item_length;
+ proto_item *tf;
+ proto_tree *info_tree;
+ gint ett;
+ gint (*dissector)(tvbuff_t *, int, int, packet_info *, proto_tree *, wccp_address_table*);
+
+ /* check if all required fields are there */
+ gboolean wccp2_security_info;
+ gboolean wccp2_service_info;
+ gboolean wccp2_router_id_info;
+ gboolean wccp2_wc_id_info;
+ gboolean wccp2_rtr_view_info;
+ gboolean wccp2_wc_view_info;
+ gboolean wccp2_redirect_assignment;
+ gboolean wccp2_query_info;
+ gboolean wccp2_capabilities_info;
+ gboolean wccp2_alt_assignment;
+ gboolean wccp2_assign_map;
+ gboolean wccp2_command_extension;
+ gboolean wccp2r1_alt_assignment_map;
+ wccp_address_table wccp_wccp_address_table = {FALSE, -1, -1, 0, NULL, NULL};
+
+ wccp2_security_info=FALSE;
+ wccp2_service_info=FALSE;
+ wccp2_router_id_info=FALSE;
+ wccp2_wc_id_info=FALSE;
+ wccp2_rtr_view_info=FALSE;
+ wccp2_wc_view_info=FALSE;
+ wccp2_redirect_assignment=FALSE;
+ wccp2_query_info=FALSE;
+ wccp2_capabilities_info=FALSE;
+ wccp2_alt_assignment=FALSE;
+ wccp2_assign_map=FALSE;
+ wccp2_command_extension=FALSE;
+ wccp2r1_alt_assignment_map=FALSE;
+
+ /* ugly hack: we first need to check for the address table
+ component, otherwise we cannot print the IP's.
+ */
+ find_wccp_address_table(tvb,offset,pinfo,wccp_tree, &wccp_wccp_address_table);
+
+ while (tvb_reported_length_remaining(tvb, offset) > 0) {
+ type = tvb_get_ntohs(tvb, offset);
+ switch (type) {
+
+ case WCCP2_SECURITY_INFO:
+ wccp2_security_info=TRUE;
+ ett = ett_security_info;
+ dissector = dissect_wccp2_security_info;
+ break;
+
+ case WCCP2_SERVICE_INFO:
+ wccp2_service_info=TRUE;
+ ett = ett_service_info;
+ dissector = dissect_wccp2_service_info;
+ break;
+
+ case WCCP2_ROUTER_ID_INFO:
+ wccp2_router_id_info=TRUE;
+ ett = ett_router_identity_info;
+ dissector = dissect_wccp2_router_identity_info;
+ break;
+
+ case WCCP2_WC_ID_INFO:
+ wccp2_wc_id_info=TRUE;
+ ett = ett_wc_identity_info;
+ dissector = dissect_wccp2_wc_identity_info;
+ break;
+
+ case WCCP2_RTR_VIEW_INFO:
+ wccp2_rtr_view_info=TRUE;
+ ett = ett_router_view_info;
+ dissector = dissect_wccp2_router_view_info;
+ break;
+
+ case WCCP2_WC_VIEW_INFO:
+ wccp2_wc_view_info=TRUE;
+ ett = ett_wc_view_info;
+ dissector = dissect_wccp2_web_cache_view_info;
+ break;
+
+ case WCCP2_REDIRECT_ASSIGNMENT:
+ wccp2_redirect_assignment=TRUE;
+ ett = ett_router_assignment_info;
+ dissector = dissect_wccp2_assignment_info;
+ break;
+
+ case WCCP2_QUERY_INFO:
+ wccp2_query_info=TRUE;
+ ett = ett_query_info;
+ dissector = dissect_wccp2_router_query_info;
+ break;
+
+ case WCCP2_CAPABILITIES_INFO:
+ wccp2_capabilities_info=TRUE;
+ ett = ett_capabilities_info;
+ dissector = dissect_wccp2_capability_info;
+ break;
+
+ case WCCP2_ALT_ASSIGNMENT:
+ wccp2_alt_assignment=TRUE;
+ ett = ett_alt_assignment_info;
+ dissector = dissect_wccp2_alternate_assignment_info;
+ break;
+
+ case WCCP2r1_ALT_ASSIGNMENT_MAP:
+ wccp2r1_alt_assignment_map=TRUE;
+ ett = ett_alt_assignment_map;
+ dissector = dissect_wccp2r1_alt_assignment_map_info;
+ break;
+
+ case WCCP2r1_ADDRESS_TABLE:
+ ett = ett_address_table;
+ dissector = dissect_wccp2r1_address_table_info;
+ break;
+
+ case WCCP2_ASSIGN_MAP:
+ wccp2_assign_map=TRUE;
+ ett = ett_assignment_map;
+ dissector = dissect_wccp2_assignment_map;
+ break;
+ case WCCP2_COMMAND_EXTENSION:
+ wccp2_command_extension=TRUE;
+ ett = ett_command_extension;
+ dissector = dissect_wccp2_command_extension;
+ break;
+
+ default:
+ ett = ett_unknown_info;
+ dissector = NULL;
+ break;
+ }
+
+ info_tree = proto_tree_add_subtree(wccp_tree, tvb, offset, -1, ett, &tf,
+ val_to_str(type, info_type_vals, "Unknown info type (%u)"));
+
+ proto_tree_add_item(info_tree, hf_item_type, tvb, offset, 2, ENC_BIG_ENDIAN);
+
+ item_length = tvb_get_ntohs(tvb, offset+2);
+ proto_tree_add_item(info_tree, hf_item_length, tvb, offset+2, 2, ENC_BIG_ENDIAN);
+
+ offset += 4;
+
+ if (dissector != NULL) {
+ gint remaining_item_length = (*dissector)(tvb, offset, item_length, pinfo, info_tree, &wccp_wccp_address_table);
+
+ /* warn if we left bytes */
+ if (remaining_item_length > 0)
+ expert_add_info_format(pinfo, tf, &ei_wccp_length_bad,
+ "The item is %d bytes too long",
+ remaining_item_length);
+
+ /* error if we needed more bytes */
+ if (remaining_item_length < 0)
+ expert_add_info_format(pinfo, tf, &ei_wccp_length_bad,
+ "The item is %d bytes too short",
+ -remaining_item_length);
+
+ /* we assume that the item length is correct and jump forward */
+ } else {
+ proto_tree_add_item(info_tree, hf_item_data, tvb, offset, item_length, ENC_NA);
+ }
+
+ offset += item_length;
+ proto_item_set_end(tf, tvb, offset);
+ }
+
+
+ /* we're done. Check if we got all the required components */
+
+ switch (message_type) {
+ case WCCP2_HERE_I_AM:
+ if (!wccp2_security_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_security_info);
+ if (!wccp2_service_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_service_info);
+ if (wccp2_router_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_router_id_info);
+ if (!wccp2_wc_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_wc_id_info);
+ if (wccp2_rtr_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_rtr_view_info);
+ if (!wccp2_wc_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_wc_view_info);
+ if (wccp2_redirect_assignment)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_redirect_assignment);
+ if (wccp2_query_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_query_info);
+ if (wccp2_alt_assignment)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_alt_assignment);
+ if (wccp2_assign_map)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_assign_map);
+ if (wccp2r1_alt_assignment_map)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_alt_assignment_map);
+ break;
+ case WCCP2_I_SEE_YOU:
+ if (!wccp2_security_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_security_info);
+ if (!wccp2_service_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_service_info);
+ if (!wccp2_router_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_router_id_info);
+ if (wccp2_wc_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_wc_id_info);
+ if (!wccp2_rtr_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_rtr_view_info);
+ if (wccp2_wc_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_wc_view_info);
+ if (wccp2_redirect_assignment)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_redirect_assignment);
+ if (wccp2_query_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_query_info);
+ if (wccp2r1_alt_assignment_map)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_alt_assignment_map);
+ break;
+
+ case WCCP2_REMOVAL_QUERY:
+ if (!wccp2_security_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_security_info);
+ if (!wccp2_service_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_service_info);
+ if (wccp2_router_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_router_id_info);
+ if (wccp2_wc_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_wc_id_info);
+ if (wccp2_rtr_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_rtr_view_info);
+ if (wccp2_wc_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_wc_view_info);
+ if (wccp2_redirect_assignment)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_redirect_assignment);
+ if (!wccp2_query_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_query_info);
+ if (wccp2_capabilities_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_capabilities_info);
+ if (wccp2_alt_assignment)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_alt_assignment);
+ if (wccp2_assign_map)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_assign_map);
+ if (wccp2_command_extension)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_command_extension);
+ if (wccp2r1_alt_assignment_map)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_alt_assignment_map);
+ break;
+
+ case WCCP2_REDIRECT_ASSIGN:
+ if (!wccp2_security_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_security_info);
+ if (!wccp2_service_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_service_info);
+ if (wccp2_router_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_router_id_info);
+ if (wccp2_wc_id_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_wc_id_info);
+ if (wccp2_rtr_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_rtr_view_info);
+ if (wccp2_wc_view_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_wc_view_info);
+ if (wccp2_query_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_query_info);
+ if (wccp2_capabilities_info)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_capabilities_info);
+ if (! (wccp2_assign_map || wccp2r1_alt_assignment_map || wccp2_alt_assignment || wccp2_redirect_assignment))
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_missing_assignment);
+ if (wccp2_command_extension)
+ expert_add_info(pinfo, wccp_tree, &ei_wccp_contains_command_extension);
+ break;
+ }
+}
+
+static int
+dissect_wccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+ int offset = 0;
+ proto_tree *wccp_tree = NULL;
+ proto_item *wccp_tree_item;
+ guint32 wccp_message_type;
+ guint16 length;
+ gint wccp2_length;
+ proto_item *length_item;
+ guint32 cache_count;
+ guint32 ipaddr;
+ guint i;
+ guint8 bucket;
+
+ wccp_message_type = tvb_get_ntohl(tvb, offset);
+
+ /* Check if this is really a WCCP message */
+ if (try_val_to_str(wccp_message_type, wccp_type_vals) == NULL)
+ return 0;
+
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "WCCP");
+
+ col_add_str(pinfo->cinfo, COL_INFO, val_to_str(wccp_message_type,
+ wccp_type_vals, "Unknown WCCP message (%u)"));
+
+ wccp_tree_item = proto_tree_add_item(tree, proto_wccp, tvb, offset, -1, ENC_NA);
+ wccp_tree = proto_item_add_subtree(wccp_tree_item, ett_wccp);
+
+ proto_tree_add_uint(wccp_tree, hf_wccp_message_type, tvb, offset, 4, wccp_message_type);
+ offset += 4;
+
+ switch (wccp_message_type) {
+
+ case WCCP_HERE_I_AM:
+ proto_tree_add_item(wccp_tree, hf_wccp_version, tvb,
+ offset, 4, ENC_BIG_ENDIAN);
+ offset += 4;
+ offset = dissect_hash_data(tvb, offset, wccp_tree);
+ proto_tree_add_item(wccp_tree, hf_recvd_id, tvb, offset,
+ 4, ENC_BIG_ENDIAN);
+ /*offset += 4;*/
+ break;
+
+ case WCCP_I_SEE_YOU:
+ proto_tree_add_item(wccp_tree, hf_wccp_version, tvb,
+ offset, 4, ENC_BIG_ENDIAN);
+ offset += 4;
+ proto_tree_add_item(wccp_tree, hf_change_num, tvb, offset,
+ 4, ENC_BIG_ENDIAN);
+ offset += 4;
+ proto_tree_add_item(wccp_tree, hf_recvd_id, tvb, offset,
+ 4, ENC_BIG_ENDIAN);
+ offset += 4;
+ cache_count = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(wccp_tree, hf_wc_num, tvb, offset, 4, cache_count);
+ offset += 4;
+ for (i = 0; i < cache_count; i++) {
+ offset = dissect_web_cache_list_entry(tvb, offset, i,
+ wccp_tree);
+ }
+ break;
+
+ case WCCP_ASSIGN_BUCKET:
+ /*
+ * This hasn't been tested, since I don't have any
+ * traces with this in it.
+ *
+ * The V1 spec claims that this does, indeed,
+ * have a Received ID field after the type,
+ * rather than a Version field.
+ */
+ proto_tree_add_item(wccp_tree, hf_recvd_id, tvb, offset,
+ 4, ENC_BIG_ENDIAN);
+ offset += 4;
+ cache_count = tvb_get_ntohl(tvb, offset);
+ proto_tree_add_uint(wccp_tree, hf_wc_num, tvb, offset, 4, cache_count);
+ offset += 4;
+ for (i = 0; i < cache_count; i++) {
+ ipaddr = tvb_get_ipv4(tvb, offset);
+ proto_tree_add_ipv4_format(wccp_tree,
+ hf_cache_ip, tvb, offset, 4,
+ ipaddr,
+ "Web Cache %d IP Address: %s", i,
+ tvb_ip_to_str(pinfo->pool, tvb, offset));
+ offset += 4;
+ }
+
+ for (i = 0; i < 256; i++) {
+ bucket = tvb_get_guint8(tvb, offset);
+ if (bucket == 0xff) {
+ proto_tree_add_uint_format(wccp_tree, hf_bucket, tvb, offset, 1,
+ bucket, "Bucket %d: Unassigned", i);
+ } else {
+ proto_tree_add_uint_format(wccp_tree, hf_bucket, tvb, offset, 1,
+ bucket, "Bucket %d: %d", i, bucket);
+ }
+ offset++;
+ }
+ break;
+
+ case WCCP2_HERE_I_AM:
+ case WCCP2_I_SEE_YOU:
+ case WCCP2_REMOVAL_QUERY:
+ case WCCP2_REDIRECT_ASSIGN:
+ default: /* assume unknown packets are v2 */
+ /* 5.5 WCCP Message Header */
+
+ proto_tree_add_item(wccp_tree, hf_message_header_version, tvb, offset, 2,
+ ENC_BIG_ENDIAN);
+ offset += 2;
+
+ length = tvb_get_ntohs(tvb, offset);
+ length_item = proto_tree_add_uint(wccp_tree, hf_message_header_length, tvb, offset, 2, length);
+ offset += 2;
+
+ /* Is the length plus the length of the data preceding it longer than
+ the length of our packet? */
+ wccp2_length = tvb_reported_length_remaining(tvb, offset);
+ if (length > (guint)wccp2_length) {
+ expert_add_info_format(pinfo, length_item, &ei_wccp_length_bad,
+ "The length as specified by the length field is bigger than the length of the packet");
+ length = wccp2_length - offset;
+ } else {
+ /* Truncate the packet to the specified length. */
+ tvb_set_reported_length(tvb, offset + length);
+ }
+ proto_item_set_len(wccp_tree_item, offset + length);
+ dissect_wccp2_info(tvb, offset, pinfo, wccp_tree, wccp_message_type);
+ break;
+ }
+
+ return tvb_captured_length(tvb);
+}
+
+
+
+/* End of utility functions */
+
+void
+proto_register_wccp(void)
+{
+ static hf_register_info hf[] = {
+ { &hf_wccp_message_type,
+ { "WCCP Message Type", "wccp.message", FT_UINT32, BASE_DEC, VALS(wccp_type_vals), 0x0,
+ "The WCCP message that was sent", HFILL }
+ },
+ { &hf_wccp_version,
+ { "WCCP Version", "wccp.version", FT_UINT32, BASE_HEX, VALS(wccp_version_val), 0x0,
+ "The WCCP version", HFILL }
+ },
+ { &hf_bucket,
+ { "Bucket", "wccp.bucket", FT_UINT8, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_bucket_bit,
+ { "Bucket", "wccp.bucket_bit", FT_UINT8, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_message_header_version,
+ { "WCCP Version (>=2)", "wccp.message_header_version", FT_UINT16, BASE_HEX, NULL, 0x0,
+ "The WCCP version for version 2 and above", HFILL }
+ },
+ { &hf_hash_revision,
+ { "Hash Revision", "wccp.hash_revision", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ "The cache hash revision", HFILL }
+ },
+ { &hf_change_num,
+ { "Change Number", "wccp.change_num", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ "The Web-Cache list entry change number", HFILL }
+ },
+ { &hf_hash_flag,
+ { "Flags", "wccp.hash_flag", FT_UINT32, BASE_HEX, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_hash_flag_u,
+ { "Hash information", "wccp.hash_flag.u", FT_BOOLEAN, 32, TFS(&tfs_historical_current), 0x00010000,
+ NULL, HFILL }
+ },
+ { &hf_recvd_id,
+ { "Received ID", "wccp.recvd_id", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ "The number of I_SEE_YOU's that have been sent", HFILL }
+ },
+ { &hf_cache_ip,
+ { "Web Cache IP address", "wccp.cache_ip", FT_IPv4, BASE_NONE, NULL, 0x0,
+ "The IP address of a Web cache", HFILL }
+ },
+ { &hf_wc_num,
+ { "Number of Web Caches", "wccp.wc_num", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_message_header_length,
+ { "Length", "wccp.message_header_length", FT_UINT16, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_item_length,
+ { "Length", "wccp.item_length", FT_UINT16, BASE_DEC, 0x0, 0x0,
+ "The Length of the WCCPv2 item", HFILL }
+ },
+ { &hf_item_type,
+ { "Type", "wccp.item_type", FT_UINT16, BASE_DEC, VALS(info_type_vals), 0x0,
+ "The type of the WCCPv2 item", HFILL }
+ },
+ { &hf_item_data,
+ { "Data", "wccp.item_data", FT_BYTES, BASE_NONE, 0x0, 0x0,
+ "The data for an unknown item type", HFILL }
+ },
+ { &hf_security_info_option,
+ { "Security Option", "wccp.security_info_option", FT_UINT32, BASE_DEC, VALS(security_option_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_security_info_md5_checksum,
+ { "MD5 checksum (not checked)", "wccp.security_md5_checksum", FT_BYTES, BASE_NONE, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_element_type,
+ {"Command Extension Type", "wccp.command_element_type", FT_UINT16, BASE_DEC, VALS(wccp_command_type_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_element_length,
+ {"Command Extension Length", "wccp.command_element_length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_length,
+ {"Command Length", "wccp.command_length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_element_shutdown_ip_index,
+ {"Command Element Shutdown IP", "wccp.command_element_shudown_ip_Address.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_element_shutdown_ipv4,
+ {"Command Element Shutdown IP", "wccp.command_element_shudown_ip_address.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_element_shutdown_ipv6,
+ {"Command Element Shutdown IP", "wccp.command_element_shudown_ip_address.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_command_unknown,
+ {"Unknown Command", "wccp.command_unknown", FT_NONE, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_type,
+ { "Service Type", "wccp.service_info_type", FT_UINT8, BASE_DEC, VALS(service_type_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_id_standard,
+ { "WCCP Service ID (Standard)", "wccp.service_info_std_id", FT_UINT8, BASE_DEC, VALS(service_id_vals) , 0x0,
+ "The WCCP Service id (Standard)", HFILL }
+ },
+ { &hf_service_info_id_dynamic,
+ { "WCCP Service ID ( Dynamic)", "wccp.service_info_dyn_id", FT_UINT8, BASE_DEC, NULL , 0x0,
+ "The WCCP Service id (Dynamic)", HFILL }
+ },
+ { &hf_service_info_priority,
+ { "Priority (highest is 255)", "wccp.service_info_priority", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_protocol,
+ { "Protocol", "wccp.service_info_protocol", FT_UINT8, BASE_DEC | BASE_EXT_STRING, &ipproto_val_ext, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags,
+ { "Flags", "wccp.service_info_flags", FT_UINT32, BASE_HEX, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_src_ip_hash,
+ { "Source IP address in primary hash", "wccp.service_info_flag.src_ip_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_SRC_IP_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_dest_ip_hash,
+ { "Destination IP address in primary hash", "wccp.service_info_flag.dest_ip_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_DST_IP_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_src_port_hash,
+ { "Source port in primary hash", "wccp.service_info_flag.src_port_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_SRC_PORT_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_dest_port_hash,
+ { "Destination port in primary hash", "wccp.service_info_flag.dest_port_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_DST_PORT_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_ports_defined,
+ { "Ports", "wccp.service_info_flag.ports_defined", FT_BOOLEAN, 32, TFS(&tfs_defined_not_defined), WCCP2_SI_PORTS_DEFINED,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_ports_source,
+ { "Ports refer to", "wccp.service_info_flag.ports_source", FT_BOOLEAN, 32, TFS(&tfs_src_dest_port), WCCP2_SI_PORTS_SOURCE,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_redirect_only_protocol_0,
+ { "Redirect only protocol 0", "wccp.service_info_flag.redirect_only_protocol_0", FT_BOOLEAN, 32, TFS(&tfs_redirect_protocol0), WCCP2r1_SI_REDIRECT_ONLY_PROTOCOL_0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_src_ip_alt_hash,
+ { "Source IP address in secondary hash", "wccp.service_info_flag.src_ip_alt_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_SRC_IP_ALT_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_dest_ip_alt_hash,
+ { "Destination IP address in secondary hash", "wccp.service_info_flag.dest_ip_alt_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_DST_IP_ALT_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_src_port_alt_hash,
+ { "Source port in secondary hash", "wccp.service_info_flag.src_port_alt_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_SRC_PORT_ALT_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_dest_port_alt_hash,
+ { "Destination port in secondary hash", "wccp.service_info_flag.dest_port_alt_hash", FT_BOOLEAN, 32, TFS(&tfs_used_notused), WCCP2_SI_DST_PORT_ALT_HASH,
+ NULL, HFILL }
+ },
+ { &hf_service_info_flags_reserved,
+ { "Reserved, should be 0", "wccp.service_info_flag.reserved", FT_UINT32, BASE_HEX, NULL, 0xFFFFF000,
+ NULL, HFILL }
+ },
+ { &hf_service_info_source_port,
+ { "Source Port", "wccp.service_info_source_port", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_service_info_destination_port,
+ { "Destination Port", "wccp.service_info_destination_port", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_ip_index,
+ { "IP Address", "wccp.router_identity.ip_address.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_ipv4,
+ { "IP Address", "wccp.router_identity.ip_address.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_ipv6,
+ { "IP Address", "wccp.router_identity.ip_address.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_receive_id,
+ { "Received ID", "wccp.router_identity.receive_id", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_send_to_ip_index,
+ { "Sent To IP Address", "wccp.router_identity.send_to_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_send_to_ipv4,
+ { "Sent To IP Address", "wccp.router_identity.send_to_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_send_to_ipv6,
+ { "Sent To IP Address", "wccp.router_identity.send_to_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_received_from_num,
+ { "Number of Received From IP addresses (Webcache to which the message is directed)", "wccp.router.num_recv_ip", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_index,
+ { "Web-Cache IP Address", "wccp.web_cache_identity.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_ipv4,
+ { "Web-Cache IP Address", "wccp.web_cache_identity.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_ipv6,
+ { "Web-Cache IP Address", "wccp.web_cache_identity.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_hash_rev,
+ { "Hash Revision", "wccp.web_cache_identity.hash_rev", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_flags,
+ { "Flags", "wccp.web_cache_identity.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_flag_hash_info,
+ { "Hash information", "wccp.web_cache_identity.flags.hash_info", FT_BOOLEAN, 16,
+ TFS(&tfs_historical_current), 0x1,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_flag_assign_type,
+ { "Assignment Type", "wccp.web_cache_identity.flags.assign_type", FT_UINT16, BASE_HEX,
+ VALS(wccp_web_cache_assignment_data_type_val), 0x6,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_flag_version_request,
+ { "Version Request", "wccp.web_cache_identity.flags.version_request", FT_BOOLEAN, 16,
+ TFS(&tfs_version_min_max), 0x8,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_identity_flag_reserved,
+ { "Reserved, should be 0", "wccp.web_cache_identity.flags.reserved", FT_UINT16, BASE_HEX,
+ NULL, 0xFFF0,
+ NULL, HFILL }
+ },
+ { &hf_mask_value_set_element_value_element_num,
+ { "Number of Value Elements", "wccp.mask_value_set_selement.value_element_num", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_weight,
+ { "Assignment Weight", "wccp.assignment_weight", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_status,
+ { "Status", "wccp.assignment_status", FT_UINT16, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_key_ip_index,
+ { "Assignment Key IP Address", "wccp.assignment_key.ip_index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_key_ipv4,
+ { "Assignment Key IP Address", "wccp.assignment_key.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_key_ipv6,
+ { "Assignment Key IP Address", "wccp.assignment_key.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_key_change_num,
+ { "Assignment Key Change Number", "wccp.assignment_key.change_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_no_data,
+ { "No Assignment Data Present", "wccp.assignment_no_data", FT_NONE, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_view_member_change_num,
+ { "Member Change Number", "wccp.router_view.member_change_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_router_num,
+ { "Number of Routers", "wccp.router_view.router_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_router_ip_index,
+ { "Router IP Address", "wccp.router_identity.router_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_router_ipv4,
+ { "Router IP Address", "wccp.router_identity.router_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_router_ipv6,
+ { "Router IP Address", "wccp.router_identity.router_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_received_from_ip_index,
+ { "Received From IP Address/Target Web Cache IP", "wccp.router_identity.received_from_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_received_from_ipv4,
+ { "Received From IP Address/Target Web Cache IP", "wccp.router_identity.received_from_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_identity_received_from_ipv6,
+ { "Received From IP Address/Target Web Cache IP", "wccp.router_identity.received_from_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_change_num,
+ { "Change Number", "wccp.wc_view_info.change_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_router_ip_index,
+ { "Router IP", "wccp.wc_view_info.router_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_router_ipv4,
+ { "Router IP", "wccp.wc_view_info.router_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_router_ipv6,
+ { "Router IP", "wccp.wc_view_info.router_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_wc_ip_index,
+ { "Web Cache IP", "wccp.wc_view_info.wc_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_wc_ipv4,
+ { "Web Cache IP", "wccp.wc_view_info.wc_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_info_wc_ipv6,
+ { "Web Cache IP", "wccp.wc_view_info.wc_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_router_num,
+ { "Number of Routers", "wccp.wc_view_info.router_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_view_wc_num,
+ { "Number of Web Caches", "wccp.wc_view_info.wc_num", FT_UINT32, BASE_DEC, 0x0, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_wc_identity_ip_address_index,
+ { "Web Cache Identity", "wccp.wc_identity_ip_address.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ "The IP identifying the Web Cache", HFILL }
+ },
+ { &hf_wc_identity_ip_address_ipv4,
+ { "Web Cache Identity", "wccp.wc_identity_ip_address.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ "The IP identifying the Web Cache", HFILL }
+ },
+ { &hf_wc_identity_ip_address_ipv6,
+ { "Web Cache Identity", "wccp.wc_identity_ip_address.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ "The IP identifying the Web Cache", HFILL }
+ },
+ { &hf_router_assignment_element_change_num,
+ { "Change Number", "wccp.router_assignment_element.change_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_info_router_num,
+ { "Number of Routers", "wccp.assignment_info.router_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_info_router_ip_index,
+ { "Router IP", "wccp.assignment_info.router_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_info_router_ipv4,
+ { "Router IP", "wccp.assignment_info.router_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_assignment_info_router_ipv6,
+ { "Router IP", "wccp.assignment_info.router_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_hash_buckets_assignment_wc_num,
+ { "Number of WC", "wccp.hash_buckets_assignment.wc_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_hash_buckets_assignment_wc_ip_index,
+ { "WC IP", "wccp.hash_buckets_assignment.wc_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_hash_buckets_assignment_wc_ipv4,
+ { "WC IP", "wccp.hash_buckets_assignment.wc_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_hash_buckets_assignment_wc_ipv6,
+ { "WC IP", "wccp.hash_buckets_assignment.wc_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_view_ip_index,
+ { "Router IP Address", "wccp.router_view.ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_view_ipv4,
+ { "Router IP Address", "wccp.router_view.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_view_ipv6,
+ { "Router IP Address", "wccp.router_view.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_ip_index,
+ { "Web-Cache Identity Element IP address", "wccp.router_query_info.ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_ipv4,
+ { "Web-Cache Identity Element IP address", "wccp.router_query_info.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_ipv6,
+ { "Web-Cache Identity Element IP address", "wccp.router_query_info.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_send_to_ip_index,
+ { "Sent To IP Address", "wccp.router_query_info.send_to_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_send_to_ipv4,
+ { "Sent To IP Address", "wccp.router_query_info.send_to_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_send_to_ipv6,
+ { "Sent To IP Address", "wccp.router_query_info.send_to_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_target_ip_index,
+ { "Target IP Address", "wccp.router_query_info.target_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_target_ipv4,
+ { "Target IP Address", "wccp.router_query_info.target_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_router_query_info_target_ipv6,
+ { "Target IP Address", "wccp.router_query_info.target_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_element_type,
+ { "Type", "wccp.capability_element.type", FT_UINT16, BASE_DEC, VALS(capability_type_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_element_length,
+ { "Value Length", "wccp.capability_element.length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_info_value,
+ { "Value", "wccp.capability_info.value", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_forwarding_method_flag_gre,
+ { "GRE-encapsulated", "wccp.capability_info.forwarding_method_flag.gre", FT_BOOLEAN, 32, TFS(&tfs_supported_not_supported), WCCP2_FORWARDING_METHOD_GRE,
+ NULL, HFILL }
+ },
+ { &hf_capability_forwarding_method_flag_l2,
+ { "L2 rewrite", "wccp.capability_info.forwarding_method_flag.l2", FT_BOOLEAN, 32, TFS(&tfs_supported_not_supported), WCCP2_FORWARDING_METHOD_L2,
+ NULL, HFILL }
+ },
+ { &hf_capability_assignment_method_flag_hash,
+ { "Hash", "wccp.capability_info.assignment_method_flag.hash", FT_BOOLEAN, 32, TFS(&tfs_supported_not_supported), WCCP2_ASSIGNMENT_METHOD_HASH,
+ NULL, HFILL }
+ },
+ { &hf_capability_assignment_method_flag_mask,
+ { "Mask", "wccp.capability_info.assignment_method_flag.mask", FT_BOOLEAN, 32, TFS(&tfs_supported_not_supported), WCCP2_ASSIGNMENT_METHOD_MASK,
+ NULL, HFILL }
+ },
+ { &hf_capability_return_method_flag_gre,
+ { "GRE-encapsulated", "wccp.capability_info.return_method_flag.gre", FT_BOOLEAN, 32, TFS(&tfs_supported_not_supported), WCCP2_PACKET_RETURN_METHOD_GRE,
+ NULL, HFILL }
+ },
+ { &hf_capability_return_method_flag_l2,
+ { "L2 rewrite", "wccp.capability_info.return_method_flag.l2", FT_BOOLEAN, 32, TFS(&tfs_supported_not_supported), WCCP2_PACKET_RETURN_METHOD_L2,
+ NULL, HFILL }
+ },
+ { &hf_capability_transmit_t,
+ { "Message interval in milliseconds", "wccp.capability.transmit_t", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_transmit_t_upper_limit,
+ { "Message interval upper limit in milliseconds", "wccp.capability.transmit_t.upper_limit", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_transmit_t_lower_limit,
+ { "Message interval lower limit in milliseconds", "wccp.capability.transmit_t.lower_limit", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_timer_scale_timeout_scale,
+ { "Timer scale", "wccp.capability.timer_scale.timeout_scale", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_timer_scale_timeout_scale_upper_limit,
+ { "Timer scale upper limit", "wccp.capability.timer_scale.timeout_scale.upper_limit", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_timer_scale_timeout_scale_lower_limit,
+ { "Timer scale lower limit", "wccp.capability.timer_scale.timeout_scale.lower_limit", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_timer_scale_ra_timer_scale,
+ { "RA Timer scale", "wccp.capability.timer_scale.ra_timer_scale", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_timer_scale_ra_scale_upper_limit,
+ { "RA Timer scale upper limit", "wccp.capability.timer_scale.ra_timer_scale.upper_limit", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_timer_scale_ra_scale_lower_limit,
+ { "RA Timer scale lower limit", "wccp.capability.timer_scale.ra_timer_scale.lower_limit", FT_UINT8, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_capability_value,
+ { "Value", "wccp.capability.value", FT_BYTES, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_reserved_zero,
+ { "Reserved, must be 0", "wccp.reserved_zero", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_src_ip_index,
+ { "Source Address", "wccp.value_element.src_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_src_ipv4,
+ { "Source Address", "wccp.value_element.src_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_src_ipv6,
+ { "Source Address", "wccp.value_element.src_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_dest_ip_index,
+ { "Destination Address", "wccp.value_element.dest_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_dest_ipv4,
+ { "Destination Address", "wccp.value_element.dest_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_dest_ipv6,
+ { "Destination Address", "wccp.value_element.dest_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_src_port,
+ { "Source Port", "wccp.value_element.src_port", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_dest_port,
+ { "Destination Port", "wccp.value_element.dest_port", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_web_cache_ip_index,
+ { "Web Cache Address", "wccp.value_element.web_cache_ip.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_web_cache_ipv4,
+ { "Web Cache Address", "wccp.value_element.web_cache_ip.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_value_element_web_cache_ipv6,
+ { "Web Cache Address", "wccp.value_element.web_cache_ip.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_mask_value_set_list_num_elements,
+ { "Number of elements", "wccp.mask_value_set_list.num_elements", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_mask_element_src_ip,
+ { "Source Address Mask", "wccp.mask_element.src_ip", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_mask_element_dest_ip,
+ { "Destination Address Mask", "wccp.mask_element.dest_ip", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_mask_element_src_port,
+ { "Source Port Mask", "wccp.mask_element.src_port", FT_UINT16, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_mask_element_dest_port,
+ { "Destination Port Mask", "wccp.mask_element.dest_port", FT_UINT16, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_info_assignment_type,
+ { "Assignment type", "wccp.alt_assignment_info.assignment_type", FT_UINT16, BASE_DEC, VALS(assignment_type_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_extended_assignment_data_type,
+ { "Assignment type", "wccp.extended_assignment_data.type", FT_UINT16, BASE_DEC, VALS(assignment_type_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_map_assignment_type,
+ { "Assignment type", "wccp.alt_assignment_map.assignment_type", FT_UINT16, BASE_DEC, VALS(assignment_type_vals), 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_map_assignment_length,
+ { "Assignment length", "wccp.alt_assignment_map.assignment_length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_info_assignment_length,
+ { "Assignment length", "wccp.alt_assignment_info.assignment_length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_extended_assignment_data_length,
+ { "Assignment length", "wccp.extended_assignment_data.length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_info_num_routers,
+ { "Number of routers", "wccp.alt_assignment_info.num_routers", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_mask_value_set_element_num_wc_value_elements,
+ { "Number of Web-Cache Value Elements", "wccp.alt_assignment_mask_value_set_element.num_wc_value_elements", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_value_element_wc_address_index,
+ { "Web-Cache Address", "wccp.web_cache_value_element.wc_address.index", FT_UINT32, BASE_HEX, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_value_element_wc_address_ipv4,
+ { "Web-Cache Address", "wccp.web_cache_value_element.wc_address.ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_value_element_wc_address_ipv6,
+ { "Web-Cache Address", "wccp.web_cache_value_element.wc_address.ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_value_element_num_values,
+ { "Number of Value Sequence Numbers", "wccp.web_cache_value_element.num_values", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_web_cache_value_seq_num,
+ { "Value Sequence Number", "wccp.web_cache_value_element.value_seq_num", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_alt_assignment_mask_value_set_list_num_elements,
+ { "Number of Alternate Mask/Value Set Elements", "wccp.alt_assignment_mask_value_list.num_elements", FT_UINT32, BASE_DEC, NULL, 0x0,
+ NULL, HFILL }
+ },
+ { &hf_address_table_family,
+ { "Family Type", "wccp.address_table.family_type", FT_UINT16, BASE_DEC, VALS(wccp_address_family_val), 0x0,
+ "The WCCP Address Table Family type", HFILL }
+ },
+ { &hf_address_table_address_length,
+ { "Address Length", "wccp.address_table.address_length", FT_UINT16, BASE_DEC, NULL, 0x0,
+ "The WCCP Address Table Address Length", HFILL }
+ },
+ { &hf_address_table_length,
+ { "Length", "wccp.address_table.length", FT_UINT32, BASE_DEC, NULL, 0x0,
+ "The WCCP Address Table Length", HFILL }
+ },
+ { &hf_address_table_element,
+ { "Address", "wccp.address_table.element", FT_STRING, BASE_NONE, NULL, 0x0,
+ NULL, HFILL }
+ },
+
+ };
+ static gint *ett[] = {
+ &ett_wccp,
+ &ett_buckets,
+ &ett_hash_assignment_buckets,
+ &ett_mask_assignment_data_element,
+ &ett_alternate_mask_assignment_data_element,
+ &ett_extended_assigment_data_element,
+ &ett_table_element,
+ &ett_hash_flags,
+ &ett_wc_identity_flags,
+ &ett_cache_info,
+ &ett_security_info,
+ &ett_service_info,
+ &ett_service_flags,
+ &ett_service_info_ports,
+ &ett_wc_view_info_router_element,
+ &ett_router_identity_info,
+ &ett_wc_identity_element,
+ &ett_wc_identity_info,
+ &ett_router_view_info,
+ &ett_wc_view_info,
+ &ett_router_assignment_element,
+ &ett_hash_buckets_assignment_wc_element,
+ &ett_hash_buckets_assignment_buckets,
+ &ett_router_alt_assignment_element,
+ &ett_router_assignment_info,
+ &ett_query_info,
+ &ett_capabilities_info,
+ &ett_capability_element,
+ &ett_capability_forwarding_method,
+ &ett_capability_assignment_method,
+ &ett_capability_return_method,
+ &ett_capability_transmit_t,
+ &ett_capability_timer_scale,
+ &ett_alt_assignment_info,
+ &ett_alt_assignment_map,
+ &ett_address_table,
+ &ett_assignment_map,
+ &ett_command_extension,
+ &ett_alternate_mask_value_set,
+ &ett_alternate_mask_value_set_element,
+ &ett_mv_set_list,
+ &ett_mv_set_element,
+ &ett_mv_set_value_list,
+ &ett_alternate_mv_set_element_list,
+ &ett_web_cache_value_element_list,
+ &ett_alternate_mv_set_element,
+ &ett_value_element,
+ &ett_unknown_info,
+ };
+
+ static ei_register_info ei[] = {
+ { &ei_wccp_missing_security_info, { "wccp.missing.security_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Security Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_service_info, { "wccp.missing.service_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Service Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_wc_id_info, { "wccp.missing.wc_id_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Web-Cache Identity Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_router_id_info, { "wccp.missing.router_id_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Router Identity Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_query_info, { "wccp.missing.query_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Query Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_wc_view_info, { "wccp.missing.wc_view_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Web-Cache View Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_rtr_view_info, { "wccp.missing.rtr_view_info", PI_PROTOCOL, PI_ERROR, "This message should contain a Router View Info component, but it is missing", EXPFILL }},
+ { &ei_wccp_missing_assignment, { "wccp.missing.assignment", PI_PROTOCOL, PI_ERROR, "This message should contain a Alternate Assignment, Assignment Map, Assignment Info or "
+ "Alternative Assignment Map component, but it is missing", EXPFILL }},
+ { &ei_wccp_contains_redirect_assignment, { "wccp.contains.redirect_assignment", PI_PROTOCOL, PI_ERROR, "This message contains a Assignment Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_router_id_info, { "wccp.contains.router_id_info", PI_PROTOCOL, PI_ERROR, "This message contains a Router Identity Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_rtr_view_info, { "wccp.contains.rtr_view_info", PI_PROTOCOL, PI_ERROR, "This message contains a Router View Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_query_info, { "wccp.contains.query_info", PI_PROTOCOL, PI_ERROR, "This message contains a Query Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_alt_assignment, { "wccp.contains.alt_assignment", PI_PROTOCOL, PI_ERROR, "This message contains a Alternate Assignment component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_assign_map, { "wccp.contains.assign_map", PI_PROTOCOL, PI_ERROR, "This message contains a Assignment Map component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_alt_assignment_map, { "wccp.contains.alt_assignment_map", PI_PROTOCOL, PI_ERROR, "This message contains a Alternative Assignment Map component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_wc_id_info, { "wccp.contains.wc_id_info", PI_PROTOCOL, PI_ERROR, "This message contains a Web-Cache Identity Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_wc_view_info, { "wccp.contains.wc_view_info", PI_PROTOCOL, PI_ERROR, "This message contains a Web-Cache View Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_capabilities_info, { "wccp.contains.capabilities_info", PI_PROTOCOL, PI_ERROR, "This message contains a Capabilities Info component, but it should not", EXPFILL }},
+ { &ei_wccp_contains_command_extension, { "wccp.contains.command_extension", PI_PROTOCOL, PI_ERROR, "This message contains a Command Extension component, but it should not", EXPFILL }},
+ { &ei_wccp_assignment_length_bad, { "wccp.assignment_length_bad", PI_PROTOCOL, PI_ERROR, "Assignment length bad", EXPFILL }},
+ { &ei_wccp_length_bad, { "wccp.length_bad", PI_PROTOCOL, PI_ERROR, "Length bad", EXPFILL }},
+ { &ei_wccp_service_info_priority_nonzero, { "wccp.service_info_priority.nonzero", PI_PROTOCOL, PI_WARN, "The priority must be zero for well-known services.", EXPFILL }},
+ { &ei_wccp_service_info_protocol_nonzero, { "wccp.service_info_protocol.nonzero", PI_PROTOCOL, PI_WARN, "The protocol must be zero for well-known services.", EXPFILL }},
+ { &ei_wccp_router_identity_receive_id_zero, { "wccp.router_identity.receive_id.zero", PI_PROTOCOL, PI_WARN, "Receive ID shouldn't be 0", EXPFILL }},
+ { &ei_wccp_web_cache_identity_hash_rev_zero, { "wccp.web_cache_identity.hash_rev.zero", PI_PROTOCOL, PI_WARN, "Should be 0 (6.4)", EXPFILL }},
+ { &ei_wccp_address_table_family_unknown, { "wccp.address_table.family_type.unknown", PI_PROTOCOL, PI_ERROR, "Unknown address family", EXPFILL }},
+ { &ei_wccp_capability_element_length, { "wccp.capability_element.length.invalid", PI_PROTOCOL, PI_WARN, "Value Length invalid", EXPFILL }},
+ { &ei_wccp_port_fields_not_used, { "wccp.port_fields_not_used", PI_PROTOCOL, PI_NOTE, "Ports fields not used", EXPFILL }},
+ { &ei_wccp_a_zero_not_c, { "wccp.a_zero_not_c", PI_PROTOCOL, PI_WARN, "Error A is 0, but C is not", EXPFILL }},
+#if 0
+ { &ei_wccp_c_zero_not_a, { "wccp.c_zero_not_a", PI_PROTOCOL, PI_WARN, "Error C is 0, but A is not", EXPFILL }},
+#endif
+ };
+
+ expert_module_t* expert_wccp;
+
+ proto_wccp = proto_register_protocol("Web Cache Communication Protocol",
+ "WCCP", "wccp");
+ proto_register_field_array(proto_wccp, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ expert_wccp = expert_register_protocol(proto_wccp);
+ expert_register_field_array(expert_wccp, ei, array_length(ei));
+ wccp_handle = register_dissector("wccp", dissect_wccp, proto_wccp);
+}
+
+void
+proto_reg_handoff_wccp(void)
+{
+ dissector_add_uint_with_preference("udp.port", UDP_PORT_WCCP, wccp_handle);
+}
+
+/*
+ * Editor modelines - https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 2
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * vi: set shiftwidth=2 tabstop=8 expandtab:
+ * :indentSize=2:tabSize=8:noTabs=true:
+ */
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