/* packet-pptp.c * Routines for the Point-to-Point Tunnelling Protocol (PPTP) (RFC 2637) * Brad Robel-Forrest * * 10/2010 - Rework PPTP Dissector * Alexis La Goutte * * Wireshark - 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include void proto_register_pptp(void); void proto_reg_handoff_pptp(void); static int proto_pptp = -1; static int hf_pptp_length = -1; static int hf_pptp_message_type = -1; static int hf_pptp_magic_cookie = -1; static int hf_pptp_control_message_type = -1; static int hf_pptp_reserved = -1; static int hf_pptp_protocol_version = -1; static int hf_pptp_framing_capabilities = -1; static int hf_pptp_bearer_capabilities = -1; static int hf_pptp_maximum_channels = -1; static int hf_pptp_firmware_revision = -1; static int hf_pptp_host_name = -1; static int hf_pptp_vendor_name = -1; static int hf_pptp_control_result = -1; static int hf_pptp_error = -1; static int hf_pptp_reason = -1; static int hf_pptp_stop_result = -1; static int hf_pptp_identifier = -1; static int hf_pptp_echo_result = -1; static int hf_pptp_call_id = -1; static int hf_pptp_call_serial_number = -1; static int hf_pptp_minimum_bps = -1; static int hf_pptp_maximum_bps = -1; static int hf_pptp_bearer_type = -1; static int hf_pptp_framing_type = -1; static int hf_pptp_packet_receive_window_size = -1; static int hf_pptp_packet_processing_delay = -1; static int hf_pptp_phone_number_length = -1; static int hf_pptp_phone_number = -1; static int hf_pptp_subaddress = -1; static int hf_pptp_peer_call_id = -1; static int hf_pptp_out_result = -1; static int hf_pptp_cause = -1; static int hf_pptp_connect_speed = -1; static int hf_pptp_physical_channel_id = -1; static int hf_pptp_dialed_number_length = -1; static int hf_pptp_dialed_number = -1; static int hf_pptp_dialing_number_length = -1; static int hf_pptp_dialing_number = -1; static int hf_pptp_in_result = -1; static int hf_pptp_disc_result = -1; static int hf_pptp_call_statistics = -1; static int hf_pptp_crc_errors = -1; static int hf_pptp_framing_errors = -1; static int hf_pptp_hardware_overruns = -1; static int hf_pptp_buffer_overruns = -1; static int hf_pptp_timeout_errors = -1; static int hf_pptp_alignment_errors = -1; static int hf_pptp_send_accm = -1; static int hf_pptp_receive_accm = -1; static gint ett_pptp = -1; static expert_field ei_pptp_incorrect_magic_cookie = EI_INIT; #define TCP_PORT_PPTP 1723 #define MAGIC_COOKIE 0x1A2B3C4D #define CNTRL_REQ 0x01 #define CNTRL_REPLY 0x02 #define STOP_REQ 0x03 #define STOP_REPLY 0x04 #define ECHO_REQ 0x05 #define ECHO_REPLY 0x06 #define OUT_REQ 0x07 #define OUT_REPLY 0x08 #define IN_REQ 0x09 #define IN_REPLY 0x0A #define IN_CONNECTED 0x0B #define CLEAR_REQ 0x0C #define DISC_NOTIFY 0x0D #define ERROR_NOTIFY 0x0E #define SET_LINK 0x0F static const value_string control_message_type_vals[] = { { CNTRL_REQ, "Start-Control-Connection-Request" }, { CNTRL_REPLY, "Start-Control-Connection-Reply" }, { STOP_REQ, "Stop-Control-Connection-Request" }, { STOP_REPLY, "Stop-Control-Connection-Reply" }, { ECHO_REQ, "Echo-Request" }, { ECHO_REPLY, "Echo-Reply" }, { OUT_REQ, "Outgoing-Call-Request" }, { OUT_REPLY, "Outgoing-Call-Reply" }, { IN_REQ, "Incoming-Call-Request" }, { IN_REPLY, "Incoming-Call-Reply" }, { IN_CONNECTED, "Incoming-Call-Connected" }, { CLEAR_REQ, "Call-Clear-Request" }, { DISC_NOTIFY, "Call-Disconnect-Notify" }, { ERROR_NOTIFY, "WAN-Error-Notify" }, { SET_LINK, "Set-Link-Info" }, { 0, NULL }, }; static const value_string msgtype_vals[] = { { 1, "Control Message" }, { 2, "Management Message" }, { 0, NULL } }; static const value_string frametype_vals[] = { { 1, "Asynchronous Framing supported" }, { 2, "Synchronous Framing supported"}, { 3, "Either Framing supported" }, { 0, NULL } }; static const value_string bearertype_vals[] = { { 1, "Analog access supported" }, { 2, "Digital access supported" }, { 3, "Either access supported" }, { 0, NULL } }; static const value_string control_resulttype_vals[] = { { 1, "Successful channel establishment" }, { 2, "General error" }, { 3, "Command channel already exists" }, { 4, "Requester not authorized" }, { 5, "Protocol version not supported" }, { 0, NULL } }; static const value_string errortype_vals[] = { { 0, "None" }, { 1, "Not-Connected" }, { 2, "Bad-Format" }, { 3, "Bad-Value" }, { 4, "No-Resource" }, { 5, "Bad-Call ID" }, { 6, "PAC-Error" }, { 0, NULL } }; static const value_string reasontype_vals[] = { { 1, "None" }, { 2, "Stop-Protocol" }, { 3, "Stop-Local-Shutdown" }, { 0, NULL } }; static const value_string stop_resulttype_vals[] = { { 1, "OK" }, { 2, "General error" }, { 0, NULL } }; static const value_string echo_resulttype_vals[] = { { 1, "OK" }, { 2, "General error" }, { 0, NULL } }; static const value_string out_resulttype_vals[] = { { 1, "Connected" }, { 2, "General Error" }, { 3, "No Carrier" }, { 4, "Busy" }, { 5, "No Dial Tone" }, { 6, "Time-out" }, { 7, "Do Not Accept" }, { 0, NULL } }; static const value_string in_resulttype_vals[] = { { 1, "Connect" }, { 2, "General error" }, { 3, "Do Not Accept" }, { 0, NULL } }; static const value_string disc_resulttype_vals[] = { { 1, "Lost Carrier" }, { 2, "General Error" }, { 3, "Admin Shutdown" }, { 4, "Request" }, { 0, NULL } }; static void dissect_unknown(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) { call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree); } static void dissect_cntrl_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_uint_format_value(tree, hf_pptp_protocol_version, tvb, offset, 2, tvb_get_ntohs(tvb, offset), "%u.%u", tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1)); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); offset += 2; proto_tree_add_item(tree, hf_pptp_framing_capabilities, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_bearer_capabilities, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_maximum_channels, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_firmware_revision, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_host_name, tvb, offset, 64, ENC_ASCII|ENC_NA); offset += 64; proto_tree_add_item(tree, hf_pptp_vendor_name, tvb, offset, 64, ENC_ASCII|ENC_NA); } static void dissect_cntrl_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_uint_format_value(tree, hf_pptp_protocol_version, tvb, offset, 2, tvb_get_ntohs(tvb, offset), "%u.%u", tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1)); offset += 2; proto_tree_add_item(tree, hf_pptp_control_result, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_error, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_framing_capabilities, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_bearer_capabilities, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_maximum_channels, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_firmware_revision, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_host_name, tvb, offset, 64, ENC_ASCII|ENC_NA); offset += 64; proto_tree_add_item(tree, hf_pptp_vendor_name, tvb, offset, 64, ENC_ASCII|ENC_NA); } static void dissect_stop_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_reason, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 1, ENC_NA); offset += 1; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); } static void dissect_stop_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_stop_result, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_error, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); } static void dissect_echo_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_identifier, tvb, offset, 4, ENC_BIG_ENDIAN); } static void dissect_echo_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_identifier, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_echo_result, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_error, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); } static void dissect_out_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_call_serial_number, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_minimum_bps, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_maximum_bps, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_bearer_type, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_framing_type, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_packet_receive_window_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_packet_processing_delay, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_phone_number_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); offset += 2; proto_tree_add_item(tree, hf_pptp_phone_number, tvb, offset, 64, ENC_ASCII|ENC_NA); offset += 64; proto_tree_add_item(tree, hf_pptp_subaddress, tvb, offset, 64, ENC_ASCII|ENC_NA); } static void dissect_out_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_peer_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_out_result, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_error, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_cause, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_connect_speed, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_packet_receive_window_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_packet_processing_delay, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_physical_channel_id, tvb, offset, 4, ENC_BIG_ENDIAN); } static void dissect_in_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_call_serial_number, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_bearer_type, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_physical_channel_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_dialed_number_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_dialing_number_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_dialed_number, tvb, offset, 64, ENC_ASCII|ENC_NA); offset += 64; proto_tree_add_item(tree, hf_pptp_dialing_number, tvb, offset, 64, ENC_ASCII|ENC_NA); offset += 64; proto_tree_add_item(tree, hf_pptp_subaddress, tvb, offset, 64, ENC_ASCII|ENC_NA); } static void dissect_in_reply(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_peer_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_in_result, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_error, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_packet_receive_window_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_packet_processing_delay, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); } static void dissect_in_connected(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_peer_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); offset += 2; proto_tree_add_item(tree, hf_pptp_connect_speed, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_packet_receive_window_size, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_packet_processing_delay, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_framing_type, tvb, offset, 4, ENC_BIG_ENDIAN); } static void dissect_clear_req(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); } static void dissect_disc_notify(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_disc_result, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_error, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; proto_tree_add_item(tree, hf_pptp_cause, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); offset += 2; proto_tree_add_item(tree, hf_pptp_call_statistics, tvb, offset, 64, ENC_ASCII|ENC_NA); } static void dissect_error_notify(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_peer_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); offset += 2; proto_tree_add_item(tree, hf_pptp_crc_errors, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_framing_errors, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_hardware_overruns, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_buffer_overruns, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_timeout_errors, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_alignment_errors, tvb, offset, 4, ENC_BIG_ENDIAN); } static void dissect_set_link(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *tree) { if (!tree) return; proto_tree_add_item(tree, hf_pptp_peer_call_id, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_pptp_reserved, tvb, offset, 2, ENC_NA); offset += 2; proto_tree_add_item(tree, hf_pptp_send_accm, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_pptp_receive_accm, tvb, offset, 4, ENC_BIG_ENDIAN); } static int dissect_pptp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_tree *pptp_tree = NULL; proto_item *item = NULL; int offset = 0; guint16 len; guint16 control_message_type; col_set_str(pinfo->cinfo, COL_PROTOCOL, "PPTP"); col_clear(pinfo->cinfo, COL_INFO); len = tvb_get_ntohs(tvb, offset); control_message_type = tvb_get_ntohs(tvb, offset + 8); col_add_str(pinfo->cinfo, COL_INFO, val_to_str(control_message_type, control_message_type_vals, "Unknown control type (%d)")); if (tree) { proto_item *ti; ti = proto_tree_add_item(tree, proto_pptp, tvb, offset, len, ENC_NA); pptp_tree = proto_item_add_subtree(ti, ett_pptp); proto_tree_add_item(pptp_tree, hf_pptp_length, tvb, offset, 2, ENC_BIG_ENDIAN); proto_tree_add_item(pptp_tree, hf_pptp_message_type, tvb, offset+2, 2, ENC_BIG_ENDIAN); item = proto_tree_add_item(pptp_tree, hf_pptp_magic_cookie, tvb, offset+4, 4, ENC_BIG_ENDIAN); } if (tvb_get_ntohl(tvb, offset+4) == MAGIC_COOKIE) proto_item_append_text(item," (correct)"); else { proto_item_append_text(item," (incorrect)"); expert_add_info(pinfo, item, &ei_pptp_incorrect_magic_cookie); } if (tree) { proto_tree_add_item(pptp_tree, hf_pptp_control_message_type, tvb, offset+8, 2, ENC_BIG_ENDIAN); proto_tree_add_item(pptp_tree, hf_pptp_reserved, tvb, offset+10, 2, ENC_NA); } offset += offset + 12; switch(control_message_type){ case CNTRL_REQ: /* Start-Control-Connection-Request */ dissect_cntrl_req(tvb, offset, pinfo, pptp_tree); break; case CNTRL_REPLY: /* Start-Control-Connection-Reply */ dissect_cntrl_reply(tvb, offset, pinfo, pptp_tree); break; case STOP_REQ: /* Stop-Control-Connection-Request */ dissect_stop_req(tvb, offset, pinfo, pptp_tree); break; case STOP_REPLY: /* Stop-Control-Connection-Reply */ dissect_stop_reply(tvb, offset, pinfo, pptp_tree); break; case ECHO_REQ: /* Echo-Request */ dissect_echo_req(tvb, offset, pinfo, pptp_tree); break; case ECHO_REPLY: /* Echo-Reply */ dissect_echo_reply(tvb, offset, pinfo, pptp_tree); break; case OUT_REQ: /* Outgoing-Call-Request */ dissect_out_req(tvb, offset, pinfo, pptp_tree); break; case OUT_REPLY: /* Outgoing-Call-Reply */ dissect_out_reply(tvb, offset, pinfo, pptp_tree); break; case IN_REQ: /* Incoming-Call-Request */ dissect_in_req(tvb, offset, pinfo, pptp_tree); break; case IN_REPLY: /* Incoming-Call-Reply */ dissect_in_reply(tvb, offset, pinfo, pptp_tree); break; case IN_CONNECTED: /* Incoming-Call-Connected */ dissect_in_connected(tvb, offset, pinfo, pptp_tree); break; case CLEAR_REQ: /* Call-Clear-Request */ dissect_clear_req(tvb, offset, pinfo, pptp_tree); break; case DISC_NOTIFY: /* Call-Disconnect-Notify */ dissect_disc_notify(tvb, offset, pinfo, pptp_tree); break; case ERROR_NOTIFY: /* WAN-Error-Notify */ dissect_error_notify(tvb, offset, pinfo, pptp_tree); break; case SET_LINK: /* Set-Link-Info */ dissect_set_link(tvb, offset, pinfo, pptp_tree); break; default: /* Unknown Type... */ dissect_unknown(tvb, offset, pinfo, pptp_tree); break; } return tvb_captured_length(tvb); } void proto_register_pptp(void) { static gint *ett[] = { &ett_pptp, }; static hf_register_info hf[] = { { &hf_pptp_length, { "Length", "pptp.length", FT_UINT16, BASE_DEC, NULL, 0x0, "Total length in octets of this PPTP message", HFILL } }, { &hf_pptp_message_type, { "Message type", "pptp.type", FT_UINT16, BASE_DEC, VALS(msgtype_vals), 0x0, "PPTP message type", HFILL } }, { &hf_pptp_magic_cookie, { "Magic Cookie", "pptp.magic_cookie", FT_UINT32, BASE_HEX, NULL, 0x0, "This constant value is used as a sanity check on received messages", HFILL } }, { &hf_pptp_control_message_type, { "Control Message Type", "pptp.control_message_type", FT_UINT16, BASE_DEC, VALS(control_message_type_vals), 0x0, NULL, HFILL } }, { &hf_pptp_reserved, { "Reserved", "pptp.reserved", FT_BYTES, BASE_NONE, NULL, 0x0, "This field MUST be 0", HFILL } }, { &hf_pptp_protocol_version, { "Protocol version", "pptp.protocol_version", FT_UINT16, BASE_DEC, NULL, 0x0, "The version of the PPTP protocol", HFILL } }, { &hf_pptp_framing_capabilities, { "Framing Capabilities", "pptp.framing_capabilities", FT_UINT32, BASE_DEC, VALS(frametype_vals), 0x0, "A set of bits indicating the type of framing", HFILL } }, { &hf_pptp_bearer_capabilities, { "Bearer Capabilities", "pptp.bearer_capabilities", FT_UINT32, BASE_DEC, VALS(bearertype_vals), 0x0, "A set of bits indicating the type of bearer", HFILL } }, { &hf_pptp_maximum_channels, { "Maximum Channels", "pptp.maximum_channels", FT_UINT16, BASE_DEC, NULL, 0x0, "The total number of individual PPP sessions this PAC can support", HFILL } }, { &hf_pptp_firmware_revision, { "Firmware Revision", "pptp.firmware_revision", FT_UINT16, BASE_DEC, NULL, 0x0, "This field contains the firmware revision", HFILL } }, { &hf_pptp_host_name, { "Host Name", "pptp.host_name", FT_STRING, BASE_NONE, NULL, 0x0, "A 64 octet field containing the DNS name", HFILL } }, { &hf_pptp_vendor_name, { "Vendor Name", "pptp.vendor_name", FT_STRING, BASE_NONE, NULL, 0x0, "A 64 octet field containing a vendor", HFILL } }, { &hf_pptp_control_result, { "Result Code", "pptp.control_result", FT_UINT8, BASE_DEC, VALS(control_resulttype_vals), 0x0, "Indicates the result of the command channel establishment attempt", HFILL } }, { &hf_pptp_error, { "Error Code", "pptp.error", FT_UINT8, BASE_DEC, VALS(errortype_vals), 0x0, NULL, HFILL } }, { &hf_pptp_reason, { "Reason", "pptp.reason", FT_UINT8, BASE_DEC, VALS(reasontype_vals), 0x0, "Indicates the reason for the control connection being close", HFILL } }, { &hf_pptp_stop_result, { "Result Code", "pptp.stop_result", FT_UINT8, BASE_DEC, VALS(stop_resulttype_vals), 0x0, "Indicates the result of the attempt to close the control connection", HFILL } }, { &hf_pptp_identifier, { "Identifier", "pptp.identifier", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_pptp_echo_result, { "Result Code", "pptp.echo_result", FT_UINT8, BASE_DEC, VALS(echo_resulttype_vals), 0x0, "Indicates the result of the receipt of the Echo-Request", HFILL } }, { &hf_pptp_call_id, { "Call ID", "pptp.call_id", FT_UINT16, BASE_DEC, NULL, 0x0, "A unique identifier, unique to a particular PAC-PNS pair assigned by the PNS", HFILL } }, { &hf_pptp_call_serial_number, { "Call Serial Number", "pptp.call_serial_number", FT_UINT16, BASE_DEC, NULL, 0x0, "An identifier assigned by the PNS to this session for the purpose of identifying this particular session in logged session information", HFILL } }, { &hf_pptp_minimum_bps, { "Minimum BPS", "pptp.minimum_bps", FT_UINT32, BASE_DEC, NULL, 0x0, "The lowest acceptable line speed (in bits/second) for this session", HFILL } }, { &hf_pptp_maximum_bps, { "Maximum BPS", "pptp.maximum_bps", FT_UINT32, BASE_DEC, NULL, 0x0, "The highest acceptable line speed (in bits/second) for this session", HFILL } }, { &hf_pptp_framing_type, { "Framing Type", "pptp.framing_type", FT_UINT32, BASE_DEC, VALS(frametype_vals), 0x0, "A value indicating the type of PPP framing to be used for this outgoing call", HFILL } }, { &hf_pptp_bearer_type, { "Bearer Type", "pptp.bearer_type", FT_UINT32, BASE_DEC, VALS(bearertype_vals), 0x0, "A value indicating the bearer capability required for this outgoing call", HFILL } }, { &hf_pptp_packet_receive_window_size, { "Packet Receive Window Size", "pptp.packet_receive_window_size", FT_UINT16, BASE_DEC, NULL, 0x0, "A unique identifier, unique to a particular PAC-PNS pair assigned by the PNS", HFILL } }, { &hf_pptp_packet_processing_delay, { "Packet Processing Delay", "pptp.packet_processing_delay", FT_UINT16, BASE_DEC, NULL, 0x0, "A measure of the packet processing delay that might be imposed on data sent to the PNS from the PAC", HFILL } }, { &hf_pptp_phone_number_length, { "Phone Number Length", "pptp.phone_number_length", FT_UINT16, BASE_DEC, NULL, 0x0, "The actual number of valid digits in the Phone Number field", HFILL } }, { &hf_pptp_phone_number, { "Phone Number", "pptp.phone_number", FT_STRING, BASE_NONE, NULL, 0x0, "The number to be dialed to establish the outgoing session", HFILL } }, { &hf_pptp_subaddress, { "Subaddress", "pptp.subaddress", FT_STRING, BASE_NONE, NULL, 0x0, "A 64 octet field used to specify additional dialing information.", HFILL } }, { &hf_pptp_peer_call_id, { "Peer Call ID", "pptp.peer_call_id", FT_UINT16, BASE_DEC, NULL, 0x0, "This field is set to the value received in the Call ID field of the corresponding Outgoing-Call-Request message", HFILL } }, { &hf_pptp_out_result, { "Result Code", "pptp.out_result", FT_UINT8, BASE_DEC, VALS(out_resulttype_vals), 0x0, "Indicates the result of the receipt of the Outgoing-Call-Request attempt", HFILL } }, { &hf_pptp_cause, { "Cause Code", "pptp.cause", FT_UINT16, BASE_DEC, NULL, 0x0, "This field gives additional information", HFILL } }, { &hf_pptp_connect_speed, { "Connect Speed", "pptp.connect_speed", FT_UINT32, BASE_DEC, NULL, 0x0, "The actual connection speed used, in bits/second.", HFILL } }, { &hf_pptp_physical_channel_id, { "Physical Channel ID", "pptp.physical_channel_id", FT_UINT32, BASE_DEC, NULL, 0x0, "This field is set by the PAC in a vendor-specific manner to the physical channel number used to place this call", HFILL } }, { &hf_pptp_dialed_number_length, { "Dialed Number Length", "pptp.dialed_number_length", FT_UINT16, BASE_DEC, NULL, 0x0, "The actual number of valid digits in the Dialed Number field", HFILL } }, { &hf_pptp_dialed_number, { "Dialed Number", "pptp.dialed_number", FT_STRING, BASE_NONE, NULL, 0x0, "The number that was dialed by the caller", HFILL } }, { &hf_pptp_dialing_number_length, { "Dialing Number Length", "pptp.dialing_number_length", FT_UINT16, BASE_DEC, NULL, 0x0, "The actual number of valid digits in the Dialing Number field", HFILL } }, { &hf_pptp_dialing_number, { "Dialing Number", "pptp.dialing_number", FT_STRING, BASE_NONE, NULL, 0x0, "The number from which the call was placed", HFILL } }, { &hf_pptp_in_result, { "Result Code", "pptp.in_result", FT_UINT8, BASE_DEC, VALS(in_resulttype_vals), 0x0, "This value indicates the result of the Incoming-Call-Request attempt", HFILL } }, { &hf_pptp_disc_result, { "Result Code", "pptp.disc_result", FT_UINT8, BASE_DEC, VALS(disc_resulttype_vals), 0x0, "This value indicates the reason for the disconnect", HFILL } }, { &hf_pptp_call_statistics, { "Call Statistics", "pptp.call_Statistics", FT_STRING, BASE_NONE, NULL, 0x0, "This field is an ASCII string containing vendor-specific call statistics that can be logged for diagnostic purpose", HFILL } }, { &hf_pptp_crc_errors, { "CRC Errors", "pptp.crc_errors", FT_UINT32, BASE_DEC, NULL, 0x0, "Number of PPP frames received with CRC errors since session was established", HFILL } }, { &hf_pptp_framing_errors, { "Framing Errors", "pptp.framing_errors", FT_UINT32, BASE_DEC, NULL, 0x0, "Number of improperly framed PPP packets received", HFILL } }, { &hf_pptp_hardware_overruns, { "Hardware overruns", "pptp.hardware_overruns", FT_UINT32, BASE_DEC, NULL, 0x0, "Number of receive buffer over-runs since session was established", HFILL } }, { &hf_pptp_buffer_overruns, { "Buffer overruns", "pptp.buffer_overruns", FT_UINT32, BASE_DEC, NULL, 0x0, "Number of buffer over-runs detected since session was established", HFILL } }, { &hf_pptp_timeout_errors, { "Time-out Errors", "pptp.timeout_errors", FT_UINT32, BASE_DEC, NULL, 0x0, "Number of time-outs since call was established", HFILL } }, { &hf_pptp_alignment_errors, { "Alignment Errors", "pptp.alignment_errors", FT_UINT32, BASE_DEC, NULL, 0x0, "Number of Alignment errors since call was established", HFILL } }, { &hf_pptp_send_accm, { "Send ACCM", "pptp.send_accm", FT_UINT32, BASE_HEX, NULL, 0x0, "The send ACCM value the client should use to process outgoing PPP packets", HFILL } }, { &hf_pptp_receive_accm, { "Receive ACCM", "pptp.receive_accm", FT_UINT32, BASE_HEX, NULL, 0x0, "The Receive ACCM value the client should use to process incoming PPP packets", HFILL } }, }; static ei_register_info ei[] = { { &ei_pptp_incorrect_magic_cookie, { "pptp.magic_cookie.incorrect", PI_PROTOCOL, PI_WARN, "Incorrect Magic Cookie", EXPFILL }}, }; expert_module_t* expert_pptp; proto_pptp = proto_register_protocol("Point-to-Point Tunnelling Protocol", "PPTP", "pptp"); proto_register_field_array(proto_pptp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_pptp = expert_register_protocol(proto_pptp); expert_register_field_array(expert_pptp, ei, array_length(ei)); } void proto_reg_handoff_pptp(void) { dissector_handle_t pptp_handle; pptp_handle = create_dissector_handle(dissect_pptp, proto_pptp); dissector_add_uint("tcp.port", TCP_PORT_PPTP, pptp_handle); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local Variables: * c-basic-offset: 2 * tab-width: 8 * indent-tabs-mode: nil * End: * * ex: set shiftwidth=2 tabstop=8 expandtab: * :indentSize=2:tabSize=8:noTabs=true: */