/* packet-dhcpfo.c * Routines for ISC DHCP Server failover protocol dissection * Copyright 2004, M. Ortega y Strupp * * $Id$ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* * This implementation is loosely based on draft-ietf-dhc-failover-07.txt. * As this document does not represent the actual implementation, the * source code of ISC DHCPD 3.0 was used too. * * See also * * http://community.roxen.com/developers/idocs/drafts/draft-ietf-dhc-failover-10.html * * upon which the handling of the message-digest option is based. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include "packet-arp.h" #define TCP_PORT_DHCPFO 519 static unsigned int tcp_port_pref = TCP_PORT_DHCPFO; static dissector_handle_t dhcpfo_handle; /* Initialize the protocol and registered fields */ static int proto_dhcpfo = -1; static int hf_dhcpfo_length = -1; static int hf_dhcpfo_type = -1; static int hf_dhcpfo_poffset = -1; static int hf_dhcpfo_time = -1; static int hf_dhcpfo_xid = -1; static int hf_dhcpfo_additional_HB = -1; static int hf_dhcpfo_payload_data = -1; static int hf_dhcpfo_option_code = -1; static int hf_dhcpfo_dhcp_style_option = -1; static int hf_dhcpfo_option_length = -1; static int hf_dhcpfo_binding_status = -1; static int hf_dhcpfo_server_state = -1; static int hf_dhcpfo_assigned_ip_address = -1; static int hf_dhcpfo_sending_server_ip_address = -1; static int hf_dhcpfo_addresses_transfered = -1; static int hf_dhcpfo_client_identifier = -1; static int hf_dhcpfo_client_hw_type = -1; static int hf_dhcpfo_client_hardware_address = -1; static int hf_dhcpfo_ftddns = -1; static int hf_dhcpfo_reject_reason = -1; static int hf_dhcpfo_message = -1; static int hf_dhcpfo_mclt = -1; static int hf_dhcpfo_vendor_class = -1; static int hf_dhcpfo_lease_expiration_time = -1; static int hf_dhcpfo_grace_expiration_time = -1; static int hf_dhcpfo_potential_expiration_time = -1; static int hf_dhcpfo_client_last_transaction_time = -1; static int hf_dhcpfo_start_time_of_state = -1; static int hf_dhcpfo_vendor_option = -1; static int hf_dhcpfo_max_unacked_bndupd = -1; static int hf_dhcpfo_protocol_version = -1; static int hf_dhcpfo_receive_timer = -1; static int hf_dhcpfo_message_digest = -1; static int hf_dhcpfo_hash_bucket_assignment = -1; /* Initialize the subtree pointers */ static gint ett_dhcpfo = -1; static gint ett_fo_payload = -1; static gint ett_fo_option = -1; /* structure for payload data */ struct payloadMessage { struct payloadMessage *next; int opcode; int length; /*guint data;*/ int actualpoffset; }; struct payloadMessage *liste; /* message-types of failover */ enum { DHCP_FO_RESERVED, DHCP_FO_POOLREQ, DHCP_FO_POOLRESP, DHCP_FO_BNDUPD, DHCP_FO_BNDACK, DHCP_FO_CONNECT, DHCP_FO_CONNECTACK, DHCP_FO_UPDREQ, DHCP_FO_UPDDONE, DHCP_FO_UPDREQALL, DHCP_FO_STATE, DHCP_FO_CONTACT, DHCP_FO_DISCONNECT }; static const value_string failover_vals[] = { {DHCP_FO_RESERVED, "Reserved"}, {DHCP_FO_POOLREQ, "Pool request"}, {DHCP_FO_POOLRESP, "Pool response"}, {DHCP_FO_BNDUPD, "Binding update"}, {DHCP_FO_BNDACK, "Binding acknowledge"}, {DHCP_FO_CONNECT, "Connect"}, {DHCP_FO_CONNECTACK, "Connect acknowledge"}, {DHCP_FO_UPDREQ, "Update request all"}, {DHCP_FO_UPDDONE, "Update done"}, {DHCP_FO_UPDREQALL, "Update request"}, {DHCP_FO_STATE, "State"}, {DHCP_FO_CONTACT, "Contact"}, {DHCP_FO_DISCONNECT, "Disconnect"}, {0, NULL} }; /*options of payload-data*/ enum { DHCP_FO_PD_UNKNOWN_PACKET0, DHCP_FO_PD_BINDING_STATUS, DHCP_FO_PD_ASSIGNED_IP_ADDRESS, DHCP_FO_PD_SENDING_SERVER_IP_ADDRESS, DHCP_FO_PD_ADDRESSES_TRANSFERED, DHCP_FO_PD_CLIENT_IDENTIFIER, DHCP_FO_PD_CLIENT_HARDWARE_ADDRESS, DHCP_FO_PD_FTDDNS, DHCP_FO_PD_REJECT_REASON, DHCP_FO_PD_MESSAGE, DHCP_FO_PD_MCLT, DHCP_FO_PD_VENDOR_CLASS, DHCP_FO_PD_UNKNOWN_PACKET12, DHCP_FO_PD_LEASE_EXPIRATION_TIME, DHCP_FO_PD_POTENTIAL_EXPIRATION_TIME, DHCP_FO_PD_GRACE_EXPIRATION_TIME, DHCP_FO_PD_CLIENT_LAST_TRANSACTION_TIME, DHCP_FO_PD_START_TIME_OF_STATE, DHCP_FO_PD_SERVERSTATE, DHCP_FO_PD_SERVERFLAG, DHCP_FO_PD_VENDOR_OPTION, DHCP_FO_PD_MAX_UNACKED_BNDUPD, DHCP_FO_PD_UNKNOWN_PACKET22, DHCP_FO_PD_RECEIVE_TIMER, DHCP_FO_PD_HASH_BUCKET_ASSIGNMENT, DHCP_FO_PD_MESSAGE_DIGEST, DHCP_FO_PD_PROTOCOL_VERSION, DHCP_FO_PD_TLS_REQUEST, DHCP_FO_PD_TLS_REPLY, DHCP_FO_PD_REQUEST_OPTION, DHCP_FO_PD_REPLY_OPTION }; static const value_string option_code_vals[] = { {DHCP_FO_PD_UNKNOWN_PACKET0, "Unknown Packet"}, {DHCP_FO_PD_BINDING_STATUS, "binding-status"}, {DHCP_FO_PD_ASSIGNED_IP_ADDRESS, "assigned-IP-address"}, {DHCP_FO_PD_SENDING_SERVER_IP_ADDRESS, "sending-server-IP-address"}, {DHCP_FO_PD_ADDRESSES_TRANSFERED, "addresses-transfered"}, {DHCP_FO_PD_CLIENT_IDENTIFIER, "client-identifier"}, {DHCP_FO_PD_CLIENT_HARDWARE_ADDRESS, "client-hardware-address"}, {DHCP_FO_PD_FTDDNS, "FTDDNS"}, {DHCP_FO_PD_REJECT_REASON, "reject-reason"}, {DHCP_FO_PD_MESSAGE, "message"}, {DHCP_FO_PD_MCLT, "MCLT"}, {DHCP_FO_PD_VENDOR_CLASS, "vendor-class"}, {DHCP_FO_PD_UNKNOWN_PACKET12, "Unknown Packet"}, {DHCP_FO_PD_LEASE_EXPIRATION_TIME, "lease-expiration-time"}, {DHCP_FO_PD_POTENTIAL_EXPIRATION_TIME, "potential-expiration-time"}, {DHCP_FO_PD_GRACE_EXPIRATION_TIME, "grace-expiration-time"}, {DHCP_FO_PD_CLIENT_LAST_TRANSACTION_TIME, "client-last-transaction-time"}, {DHCP_FO_PD_START_TIME_OF_STATE, "start-time-of-state"}, {DHCP_FO_PD_SERVERSTATE, "server-state"}, {DHCP_FO_PD_SERVERFLAG, "server-flag"}, {DHCP_FO_PD_VENDOR_OPTION, "vendor-option"}, {DHCP_FO_PD_MAX_UNACKED_BNDUPD, "max-unacked-BNDUPD"}, {DHCP_FO_PD_UNKNOWN_PACKET22, "Unknown Packet"}, {DHCP_FO_PD_RECEIVE_TIMER, "receive-timer"}, {DHCP_FO_PD_HASH_BUCKET_ASSIGNMENT, "hash-bucket-assignment"}, {DHCP_FO_PD_MESSAGE_DIGEST, "message-digest"}, {DHCP_FO_PD_PROTOCOL_VERSION, "protocol-version"}, {DHCP_FO_PD_TLS_REQUEST, "TLS-request"}, {DHCP_FO_PD_TLS_REPLY, "TLS-reply"}, {DHCP_FO_PD_REQUEST_OPTION, "request-option"}, {DHCP_FO_PD_REPLY_OPTION, "reply-option"}, {0, NULL} }; /* Binding-status */ enum { DHCP_FO_BS_UNKNOWN_PACKET, DHCP_FO_BS_FREE, DHCP_FO_BS_ACTIVE, DHCP_FO_BS_EXPIRED, DHCP_FO_BS_RELEASED, DHCP_FO_BS_ABANDONED, DHCP_FO_BS_RESET, DHCP_FO_BS_BACKUP }; static const value_string binding_status_vals[] = { {DHCP_FO_BS_UNKNOWN_PACKET, "Unknown Packet"}, {DHCP_FO_BS_FREE, "FREE"}, {DHCP_FO_BS_ACTIVE, "ACTIVE"}, {DHCP_FO_BS_EXPIRED, "EXPIRED"}, {DHCP_FO_BS_RELEASED, "RELEASED"}, {DHCP_FO_BS_ABANDONED, "ABANDONED"}, {DHCP_FO_BS_RESET, "RESET"}, {DHCP_FO_BS_BACKUP, "BACKUP"}, {0, NULL} }; /* Server-status */ enum { DHCP_FO_SS_UNKNOWN_PACKET, DHCP_FO_SS_PARTNER_DOWN, DHCP_FO_SS_NORMAL, DHCP_FO_SS_COMMUNICATION_INTERRUPTED, DHCP_FO_SS_RESOLUTION_INTERRUPTED, DHCP_FO_SS_POTENTIAL_CONFLICT, DHCP_FO_SS_RECOVER, DHCP_FO_SS_RECOVER_DONE, DHCP_FO_SS_SHUTDOWN, DHCP_FO_SS_PAUSED, DHCP_FO_SS_STARTUP, DHCP_FO_SS_RECOVER_WAIT }; static const value_string server_state_vals[] = { {DHCP_FO_SS_UNKNOWN_PACKET, "Unknown Packet"}, {DHCP_FO_SS_PARTNER_DOWN, "partner down"}, {DHCP_FO_SS_NORMAL, "normal"}, {DHCP_FO_SS_COMMUNICATION_INTERRUPTED, "communication interrupted"}, {DHCP_FO_SS_RESOLUTION_INTERRUPTED, "resolution interrupted"}, {DHCP_FO_SS_POTENTIAL_CONFLICT, "potential conflict"}, {DHCP_FO_SS_RECOVER, "recover"}, {DHCP_FO_SS_RECOVER_DONE, "recover done"}, {DHCP_FO_SS_SHUTDOWN, "shutdown"}, {DHCP_FO_SS_PAUSED, "paused"}, {DHCP_FO_SS_STARTUP, "startup"}, {DHCP_FO_SS_RECOVER_WAIT, "recover wait"}, {0, NULL} }; /* reject reasons */ enum { DHCP_FO_RR_0, DHCP_FO_RR_1, DHCP_FO_RR_2, DHCP_FO_RR_3, DHCP_FO_RR_4, DHCP_FO_RR_5, DHCP_FO_RR_6, DHCP_FO_RR_7, DHCP_FO_RR_8, DHCP_FO_RR_9, DHCP_FO_RR_10, DHCP_FO_RR_11, DHCP_FO_RR_12, DHCP_FO_RR_13, DHCP_FO_RR_14, DHCP_FO_RR_15, DHCP_FO_RR_16, DHCP_FO_RR_17, DHCP_FO_RR_18, DHCP_FO_RR_19, DHCP_FO_RR_254 = 254 }; static const value_string reject_reason_vals[] = { {DHCP_FO_RR_0, "Reserved"}, {DHCP_FO_RR_1, "Illegal IP address (not part of any address pool)"}, {DHCP_FO_RR_2, "Fatal conflict exists: address in use by other client"}, {DHCP_FO_RR_3, "Missing binding information"}, {DHCP_FO_RR_4, "Connection rejected, time mismatch too great"}, {DHCP_FO_RR_5, "Connection rejected, invalid MCLT"}, {DHCP_FO_RR_6, "Connection rejected, unknown reason"}, {DHCP_FO_RR_7, "Connection rejected, duplicate connection"}, {DHCP_FO_RR_8, "Connection rejected, invalid failover partner"}, {DHCP_FO_RR_9, "TLS not supported"}, {DHCP_FO_RR_10, "TLS supported but not configured"}, {DHCP_FO_RR_11, "TLS required but not supported by partner"}, {DHCP_FO_RR_12, "Message digest not supported"}, {DHCP_FO_RR_13, "Message digest not configured"}, {DHCP_FO_RR_14, "Protocol version mismatch"}, {DHCP_FO_RR_15, "Missing binding information"}, {DHCP_FO_RR_16, "Outdated binding information"}, {DHCP_FO_RR_17, "Less critical binding information"}, {DHCP_FO_RR_18, "No traffic within sufficient time"}, {DHCP_FO_RR_19, "Hash bucket assignment conflict"}, {DHCP_FO_RR_254, "Unknown: Error occurred but does not match any reason"}, {0, NULL} }; /* Code to actually dissect the packets */ static void dissect_dhcpfo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { /* Set up structures needed to add the protocol subtree and manage it */ proto_item *ti, *pi, *oi, *receive_timer_item; proto_tree *dhcpfo_tree, *payload_tree, *option_tree; guint16 length, tls_request; guint type, serverflag; guint poffset; guint32 xid; gchar *typestrval, *optionstrval, *tls_request_string; guint32 time, lease_expiration_time, grace_expiration_time; guint32 potential_expiration_time, client_last_transaction_time; guint32 start_time_of_state; enum DHCPFOBoolean { false, true } additionalHB, more_payload; guint additionalHBlength; struct payloadMessage *helpliste; int actualoffset; guint8 htype, reject_reason, message_digest_type; const guint8 *chaddr; guint8 binding_status; gchar *binding_status_str, *reject_reason_str; gchar *assigned_ip_address_str, *sending_server_ip_address_str; guint32 addresses_transfered; const guint8 *client_identifier_str, *vendor_class_str; gchar *htype_str, *chaddr_str; gchar *lease_expiration_time_str; gchar *grace_expiration_time_str, *potential_expiration_time_str; gchar *client_last_transaction_time_str, *start_time_of_state_str; gchar *server_state_str; guint32 mclt; guint8 server_state, protocol_version; guint32 max_unacked_bndupd, receive_timer; /* Make entries in Protocol column and Info column on summary display */ if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "DHCPFO"); length = tvb_get_ntohs(tvb, 0); type = tvb_get_guint8(tvb, 2); typestrval= match_strval(type,failover_vals); if (typestrval==NULL) { typestrval="Unknown Packet"; } poffset = tvb_get_guint8(tvb, 3); if(poffset > 12) { additionalHB = true; additionalHBlength = poffset-12; } else { additionalHB = false; additionalHBlength = 0; } xid = tvb_get_ntohl(tvb, 8); if (check_col(pinfo->cinfo, COL_INFO)){ col_add_fstr(pinfo->cinfo, COL_INFO,"%s xid: %x", typestrval,xid); } actualoffset = poffset; liste = NULL; /* payload-data */ if(length-poffset != 0) { more_payload = true; /*liste->next = NULL;*/ liste = (struct payloadMessage*)g_malloc(sizeof(struct payloadMessage)); helpliste = liste; actualoffset = poffset; while(more_payload == true) { helpliste->opcode = tvb_get_ntohs(tvb, actualoffset); helpliste->length = tvb_get_ntohs(tvb, actualoffset+2); helpliste->next = NULL; helpliste->actualpoffset = actualoffset; actualoffset = actualoffset + helpliste->length + 4; if(actualoffset>=length) { more_payload = false; } else { helpliste->next = (struct payloadMessage*)g_malloc(sizeof(struct payloadMessage)); } helpliste = helpliste->next; } } if (tree) { /* create display subtree for the protocol */ ti = proto_tree_add_item(tree, proto_dhcpfo, tvb, 0, -1, FALSE); dhcpfo_tree = proto_item_add_subtree(ti, ett_dhcpfo); proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_length, tvb, 0, 2, FALSE); proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_type, tvb, 2, 1, FALSE); proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_poffset, tvb, 3, 1, FALSE); time = tvb_get_ntohl(tvb, 4); proto_tree_add_uint_format(dhcpfo_tree, hf_dhcpfo_time, tvb, 4, 4,time,"%s", abs_time_secs_to_str(time)); proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_xid, tvb, 8, 4, FALSE); /* if there are any additional header bytes */ if(additionalHB==true) { proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_additional_HB, tvb, 12, additionalHBlength, FALSE); } if(length-poffset != 0) { /* create display subtree for the protocol */ pi = proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_payload_data, tvb, poffset, length-poffset, FALSE); payload_tree = proto_item_add_subtree(pi, ett_fo_payload); helpliste = liste; while(helpliste!=NULL) { oi = proto_tree_add_item(payload_tree, hf_dhcpfo_dhcp_style_option, tvb, helpliste->actualpoffset, helpliste->length+4, FALSE); option_tree = proto_item_add_subtree(oi, ett_fo_option); /*** DHCP-Style-Options ****/ optionstrval= match_strval(helpliste->opcode,option_code_vals); if (optionstrval==NULL) { optionstrval="Unknown Packet"; } proto_item_append_text(oi, ", %s (%d)", optionstrval, helpliste->opcode); proto_tree_add_item(option_tree, hf_dhcpfo_option_code, tvb, helpliste->actualpoffset, 2, FALSE); proto_tree_add_item(option_tree, hf_dhcpfo_option_length, tvb, helpliste->actualpoffset+2, 2, FALSE); /** opcode dependent format **/ switch(helpliste->opcode){ case DHCP_FO_PD_BINDING_STATUS: binding_status = tvb_get_guint8(tvb, helpliste->actualpoffset+4); binding_status_str = match_strval(binding_status, binding_status_vals); if(binding_status_str == NULL) { binding_status_str = "Unknown Packet"; } proto_item_append_text(oi, ", %s (%d)", binding_status_str, binding_status); proto_tree_add_item(option_tree, hf_dhcpfo_binding_status, tvb, helpliste->actualpoffset + 4, 1, FALSE); break; case DHCP_FO_PD_ASSIGNED_IP_ADDRESS: assigned_ip_address_str = ip_to_str( tvb_get_ptr(tvb, helpliste->actualpoffset+4, helpliste->length)); proto_item_append_text(oi, ", %s ", assigned_ip_address_str); proto_tree_add_item(option_tree, hf_dhcpfo_assigned_ip_address, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_SENDING_SERVER_IP_ADDRESS: sending_server_ip_address_str = ip_to_str(tvb_get_ptr(tvb,helpliste->actualpoffset+4,helpliste->length)); proto_item_append_text(oi, ", %s ", sending_server_ip_address_str); proto_tree_add_item(option_tree, hf_dhcpfo_sending_server_ip_address, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_ADDRESSES_TRANSFERED: addresses_transfered = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); proto_item_append_text(oi,", %d",addresses_transfered); proto_tree_add_item(option_tree, hf_dhcpfo_addresses_transfered, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_CLIENT_IDENTIFIER: client_identifier_str = tvb_get_ptr(tvb, helpliste->actualpoffset+4, helpliste->length); proto_item_append_text(oi,", \"%s\"",client_identifier_str); proto_tree_add_item(option_tree, hf_dhcpfo_client_identifier, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_CLIENT_HARDWARE_ADDRESS: htype = tvb_get_guint8(tvb,helpliste->actualpoffset+4); chaddr = tvb_get_ptr(tvb, helpliste->actualpoffset+5, helpliste->length-1); htype_str = arphrdtype_to_str(htype, "Unknown (0x%02x)"); chaddr_str = arphrdaddr_to_str(tvb_get_ptr(tvb, helpliste->actualpoffset+5, 6),6,htype); proto_item_append_text(oi, ", %s, %s", htype_str, chaddr_str); proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+4, 1, "Hardware type: %s", htype_str); proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+5, 6, "Client hardware address: %s", chaddr_str); break; case DHCP_FO_PD_FTDDNS: proto_tree_add_item(option_tree, hf_dhcpfo_ftddns, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_REJECT_REASON: reject_reason = tvb_get_guint8(tvb, helpliste->actualpoffset +4); reject_reason_str = match_strval(reject_reason, reject_reason_vals); if (reject_reason_str==NULL) { reject_reason_str="Unknown Packet"; } proto_item_append_text(oi, ", %s (%d)", reject_reason_str, reject_reason); proto_tree_add_item(option_tree, hf_dhcpfo_reject_reason, tvb, helpliste->actualpoffset +4, helpliste->length, FALSE); break; case DHCP_FO_PD_MESSAGE: proto_tree_add_item(option_tree, hf_dhcpfo_message, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_MCLT: mclt = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); proto_item_append_text(oi,", %d seconds",mclt); proto_tree_add_item(option_tree, hf_dhcpfo_mclt, tvb, helpliste->actualpoffset +4, helpliste->length, FALSE); break; case DHCP_FO_PD_VENDOR_CLASS: vendor_class_str = tvb_get_ptr(tvb, helpliste->actualpoffset+4,helpliste->length); proto_item_append_text(oi,", \"%s\"",vendor_class_str); proto_tree_add_item(option_tree, hf_dhcpfo_vendor_class, tvb, helpliste->actualpoffset +4, helpliste->length, FALSE); break; case DHCP_FO_PD_LEASE_EXPIRATION_TIME: lease_expiration_time = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); lease_expiration_time_str = abs_time_secs_to_str(lease_expiration_time); proto_item_append_text(oi, ", %s", lease_expiration_time_str); proto_tree_add_uint_format(option_tree, hf_dhcpfo_lease_expiration_time, tvb, helpliste->actualpoffset +4, helpliste->length, lease_expiration_time, "Lease expiration time: %s", lease_expiration_time_str); break; case DHCP_FO_PD_POTENTIAL_EXPIRATION_TIME: potential_expiration_time = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); potential_expiration_time_str = abs_time_secs_to_str(potential_expiration_time); proto_item_append_text(oi, ", %s", potential_expiration_time_str); proto_tree_add_uint_format(option_tree, hf_dhcpfo_potential_expiration_time, tvb, helpliste->actualpoffset +4, helpliste->length, potential_expiration_time, "Potential expiration time: %s", potential_expiration_time_str); break; case DHCP_FO_PD_GRACE_EXPIRATION_TIME: grace_expiration_time = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); grace_expiration_time_str = abs_time_secs_to_str(grace_expiration_time); proto_item_append_text(oi, ", %s", grace_expiration_time_str); proto_tree_add_uint_format(option_tree, hf_dhcpfo_grace_expiration_time, tvb, helpliste->actualpoffset +4, helpliste->length, grace_expiration_time, "Grace expiration time: %s", grace_expiration_time_str); break; case DHCP_FO_PD_CLIENT_LAST_TRANSACTION_TIME: client_last_transaction_time = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); client_last_transaction_time_str = abs_time_secs_to_str(client_last_transaction_time); proto_item_append_text(oi, ", %s", client_last_transaction_time_str); proto_tree_add_uint_format(option_tree, hf_dhcpfo_client_last_transaction_time, tvb, helpliste->actualpoffset +4, helpliste->length, client_last_transaction_time, "Last transaction time: %s", abs_time_secs_to_str(client_last_transaction_time)); break; case DHCP_FO_PD_START_TIME_OF_STATE: start_time_of_state = tvb_get_ntohl(tvb, helpliste->actualpoffset+4); start_time_of_state_str = abs_time_secs_to_str(start_time_of_state); proto_item_append_text(oi, ", %s", start_time_of_state_str); proto_tree_add_uint_format(option_tree, hf_dhcpfo_start_time_of_state, tvb, helpliste->actualpoffset +4, helpliste->length, start_time_of_state, "Start time of state: %s", abs_time_secs_to_str(start_time_of_state)); break; case DHCP_FO_PD_SERVERSTATE: server_state = tvb_get_guint8(tvb, helpliste->actualpoffset+4); server_state_str = match_strval(server_state,server_state_vals); if (server_state_str==NULL) { server_state_str="Unknown Packet"; } proto_item_append_text(oi, ", %s (%d)", server_state_str, server_state); proto_tree_add_item(option_tree, hf_dhcpfo_server_state, tvb, helpliste->actualpoffset + 4, 1, FALSE); break; case DHCP_FO_PD_SERVERFLAG: serverflag = tvb_get_guint8(tvb, helpliste->actualpoffset+4); if(serverflag == 1) { proto_item_append_text(oi, ", STARTUP (1)"); proto_tree_add_text(option_tree,tvb, helpliste->actualpoffset +4, helpliste->length, "Serverflag: STARTUP"); } else if(serverflag == 0) { proto_item_append_text(oi, ", NONE (%d)", serverflag); proto_tree_add_text(option_tree,tvb, helpliste->actualpoffset +4, helpliste->length, "Serverflag: NONE"); } else { proto_item_append_text(oi, "UNKNOWN FLAGS (%d)", serverflag); proto_tree_add_text(option_tree,tvb, helpliste->actualpoffset +4, helpliste->length, "Serverflag: UNKNOWN FLAGS"); } break; case DHCP_FO_PD_VENDOR_OPTION: proto_tree_add_item(option_tree, hf_dhcpfo_vendor_option, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_MAX_UNACKED_BNDUPD: max_unacked_bndupd = tvb_get_ntohl(tvb,helpliste->actualpoffset+4); proto_item_append_text(oi,", %d", max_unacked_bndupd); proto_tree_add_item(option_tree, hf_dhcpfo_max_unacked_bndupd, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_RECEIVE_TIMER: receive_timer = tvb_get_ntohl(tvb,helpliste->actualpoffset+4); proto_item_append_text(oi,", %d seconds", receive_timer); receive_timer_item = proto_tree_add_item(option_tree, hf_dhcpfo_receive_timer, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); proto_item_append_text(receive_timer_item, " seconds"); break; case DHCP_FO_PD_HASH_BUCKET_ASSIGNMENT: proto_tree_add_item(option_tree, hf_dhcpfo_hash_bucket_assignment, tvb, helpliste->actualpoffset +4, helpliste->length, FALSE); break; case DHCP_FO_PD_MESSAGE_DIGEST: message_digest_type = tvb_get_guint8(tvb,helpliste->actualpoffset+4); if(message_digest_type == 1) { proto_item_append_text(oi, ", HMAC-MD5"); proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+4, 1, "Message digest type: HMAC-MD5"); } else { proto_item_append_text(oi, ", type not allowed"); proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+4, 1, "Message digest type: not allowed"); } proto_tree_add_item(option_tree, hf_dhcpfo_message_digest, tvb, helpliste->actualpoffset+5, helpliste->length-1,FALSE); break; case DHCP_FO_PD_PROTOCOL_VERSION: protocol_version = tvb_get_guint8(tvb, helpliste->actualpoffset+4); proto_item_append_text(oi, ", version: %d", protocol_version); proto_tree_add_item(option_tree, hf_dhcpfo_protocol_version, tvb, helpliste->actualpoffset + 4, helpliste->length , FALSE); break; case DHCP_FO_PD_TLS_REQUEST: tls_request = tvb_get_ntohs(tvb,helpliste->actualpoffset+4); if(tls_request == 0) { tls_request_string = "No TLS operation"; } else if(tls_request == 1) { tls_request_string = "TLS operation desired but not required"; } else if(tls_request == 2) { tls_request_string = "TLS operation is required"; } else { tls_request_string = "Unknown value"; } proto_item_append_text(oi, ", %s", tls_request_string); proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+4, helpliste->length, "TLS request: %s", tls_request_string); break; case DHCP_FO_PD_TLS_REPLY: break; case DHCP_FO_PD_REQUEST_OPTION: break; case DHCP_FO_PD_REPLY_OPTION: break; default: break; } helpliste=helpliste->next; } } } g_free(liste); } void proto_reg_handoff_dhcpfo(void) { static gboolean initialized = FALSE; static unsigned int port = 0; if (initialized) { dissector_delete("tcp.port", port, dhcpfo_handle); } else { initialized = TRUE; } port = tcp_port_pref; dissector_add("tcp.port", tcp_port_pref, dhcpfo_handle); } /* Register the protocol with Ethereal */ void proto_register_dhcpfo(void) { /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { { &hf_dhcpfo_length, { "Message length", "dhcpfo.length", FT_UINT16, BASE_DEC, NULL, 0, "", HFILL } }, { &hf_dhcpfo_type, { "Message Type", "dhcpfo.type", FT_UINT8, BASE_DEC, VALS(failover_vals), 0, "", HFILL } }, { &hf_dhcpfo_poffset, { "Payload Offset", "dhcpfo.poffset", FT_UINT8, BASE_DEC, NULL, 0, "", HFILL } }, { &hf_dhcpfo_time, { "Time", "dhcpfo.time", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, { &hf_dhcpfo_xid, { "Xid", "dhcpfo.xid", FT_UINT32, BASE_HEX, NULL, 0, "", HFILL } }, { &hf_dhcpfo_additional_HB, {"Additional Header Bytes", "dhcpfo.additionalheaderbytes", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } }, { &hf_dhcpfo_payload_data, {"Payload Data", "dhcpfo.payloaddata", FT_NONE, BASE_NONE, NULL, 0, "", HFILL } }, { &hf_dhcpfo_dhcp_style_option, {"DHCP Style Option", "dhcpfo.dhcpstyleoption", FT_NONE, BASE_NONE, NULL, 0, "", HFILL } }, { &hf_dhcpfo_option_code, {"Option Code", "dhcpfo.optioncode", FT_UINT16, BASE_DEC, VALS(option_code_vals), 0, "", HFILL } }, {&hf_dhcpfo_option_length, {"Length", "dhcpfo.optionlength", FT_UINT16, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_binding_status, {"Type", "dhcpfo.bindingstatus", FT_UINT32, BASE_DEC, VALS(binding_status_vals), 0, "", HFILL } }, {&hf_dhcpfo_server_state, {"server status", "dhcpfo.serverstatus", FT_UINT8, BASE_DEC, VALS(server_state_vals), 0, "", HFILL } }, {&hf_dhcpfo_assigned_ip_address, {"assigned ip address", "dhcpfo.assignedipaddress", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL } }, {&hf_dhcpfo_sending_server_ip_address, {"sending server ip-address", "dhcpfo.sendingserveripaddress", FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL } }, {&hf_dhcpfo_addresses_transfered, {"addresses transfered", "dhcpfo.addressestransfered", FT_UINT8, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_client_identifier, {"Client Identifier", "dhcpfo.clientidentifier", FT_STRING, BASE_NONE, NULL, 0, "", HFILL } }, {&hf_dhcpfo_client_hw_type, {"Client Hardware Type", "dhcpfo.clienthardwaretype", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }}, {&hf_dhcpfo_client_hardware_address, {"Client Hardware Address", "dhcpfo.clienthardwareaddress", FT_BYTES, BASE_NONE, NULL, 0, "", HFILL } }, {&hf_dhcpfo_ftddns, {"FTDDNS", "dhcpfo.ftddns", FT_STRING, BASE_NONE, NULL, 0, "", HFILL } }, {&hf_dhcpfo_reject_reason, {"Reject reason", "dhcpfo.rejectreason", FT_UINT8, BASE_DEC, VALS(reject_reason_vals), 0, "", HFILL } }, {&hf_dhcpfo_message, {"Message", "dhcpfo.message", FT_STRING, BASE_NONE, NULL, 0, "", HFILL } }, {&hf_dhcpfo_mclt, {"MCLT", "dhcpfo.mclt", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_vendor_class, {"Vendor class", "dhcpfo.vendorclass", FT_STRING, BASE_NONE, NULL, 0, "", HFILL } }, {&hf_dhcpfo_lease_expiration_time, {"Lease expiration time", "dhcpfo.leaseexpirationtime", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_grace_expiration_time, {"Grace expiration time", "dhcpfo.graceexpirationtime", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_potential_expiration_time, {"Potential expiration time", "dhcpfo.potentialexpirationtime", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_client_last_transaction_time, {"Client last transaction time", "dhcpfo.clientlasttransactiontime", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_start_time_of_state, {"Start time of state", "dhcpfo.starttimeofstate", FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_vendor_option, {"Vendor option", "dhcpfo.vendoroption", FT_NONE, BASE_NONE, NULL, 0x0, "", HFILL } }, {&hf_dhcpfo_max_unacked_bndupd, {"Max unacked BNDUPD", "dhcpfo.maxunackedbndupd", FT_UINT8, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_protocol_version, {"Protocol version", "dhcpfo.protocolversion", FT_UINT8, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_receive_timer, {"Receive timer", "dhcpfo.receivetimer", FT_UINT8, BASE_DEC, NULL, 0, "", HFILL } }, {&hf_dhcpfo_message_digest, {"Message digest", "dhcpfo.messagedigest", FT_STRING, BASE_NONE, NULL, 0, "", HFILL } }, {&hf_dhcpfo_hash_bucket_assignment, {"Hash bucket assignment", "dhcpfo.hashbucketassignment", FT_BYTES, BASE_HEX, NULL, 0, "", HFILL } }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_dhcpfo, &ett_fo_payload, &ett_fo_option, }; module_t *dhcpfo_module; /* Register the protocol name and description */ proto_dhcpfo = proto_register_protocol("DHCP Failover", "DHCPFO", "dhcpfo"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_dhcpfo, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); dhcpfo_handle = create_dissector_handle(dissect_dhcpfo, proto_dhcpfo); dhcpfo_module = prefs_register_protocol(proto_dhcpfo, proto_reg_handoff_dhcpfo); prefs_register_uint_preference(dhcpfo_module, "tcp_port", "DHCP failover TCP Port", "Set the port for DHCP failover communications", 10, &tcp_port_pref); }