/* * Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * PPTP support contributed by Motonori Shindo (mshindo@mshindo.net) */ #include #ifndef lint __RCSID("$NetBSD: print-pptp.c,v 1.8 2024/09/02 16:15:32 christos Exp $"); #endif /* \summary: Point-to-Point Tunnelling Protocol (PPTP) printer */ /* specification: RFC 2637 */ #include #include "netdissect-stdinc.h" #include "netdissect.h" #include "extract.h" #define PPTP_MSG_TYPE_CTRL 1 /* Control Message */ #define PPTP_MSG_TYPE_MGMT 2 /* Management Message (currently not used */ #define PPTP_MAGIC_COOKIE 0x1a2b3c4d /* for sanity check */ #define PPTP_CTRL_MSG_TYPE_SCCRQ 1 #define PPTP_CTRL_MSG_TYPE_SCCRP 2 #define PPTP_CTRL_MSG_TYPE_StopCCRQ 3 #define PPTP_CTRL_MSG_TYPE_StopCCRP 4 #define PPTP_CTRL_MSG_TYPE_ECHORQ 5 #define PPTP_CTRL_MSG_TYPE_ECHORP 6 #define PPTP_CTRL_MSG_TYPE_OCRQ 7 #define PPTP_CTRL_MSG_TYPE_OCRP 8 #define PPTP_CTRL_MSG_TYPE_ICRQ 9 #define PPTP_CTRL_MSG_TYPE_ICRP 10 #define PPTP_CTRL_MSG_TYPE_ICCN 11 #define PPTP_CTRL_MSG_TYPE_CCRQ 12 #define PPTP_CTRL_MSG_TYPE_CDN 13 #define PPTP_CTRL_MSG_TYPE_WEN 14 #define PPTP_CTRL_MSG_TYPE_SLI 15 #define PPTP_FRAMING_CAP_ASYNC_MASK 0x00000001 /* Asynchronous */ #define PPTP_FRAMING_CAP_SYNC_MASK 0x00000002 /* Synchronous */ #define PPTP_BEARER_CAP_ANALOG_MASK 0x00000001 /* Analog */ #define PPTP_BEARER_CAP_DIGITAL_MASK 0x00000002 /* Digital */ static const char *pptp_message_type_string[] = { "NOT_DEFINED", /* 0 Not defined in the RFC2637 */ "SCCRQ", /* 1 Start-Control-Connection-Request */ "SCCRP", /* 2 Start-Control-Connection-Reply */ "StopCCRQ", /* 3 Stop-Control-Connection-Request */ "StopCCRP", /* 4 Stop-Control-Connection-Reply */ "ECHORQ", /* 5 Echo Request */ "ECHORP", /* 6 Echo Reply */ "OCRQ", /* 7 Outgoing-Call-Request */ "OCRP", /* 8 Outgoing-Call-Reply */ "ICRQ", /* 9 Incoming-Call-Request */ "ICRP", /* 10 Incoming-Call-Reply */ "ICCN", /* 11 Incoming-Call-Connected */ "CCRQ", /* 12 Call-Clear-Request */ "CDN", /* 13 Call-Disconnect-Notify */ "WEN", /* 14 WAN-Error-Notify */ "SLI" /* 15 Set-Link-Info */ #define PPTP_MAX_MSGTYPE_INDEX 16 }; /* common for all PPTP control messages */ struct pptp_hdr { nd_uint16_t length; nd_uint16_t msg_type; nd_uint32_t magic_cookie; nd_uint16_t ctrl_msg_type; nd_uint16_t reserved0; }; struct pptp_msg_sccrq { nd_uint16_t proto_ver; nd_uint16_t reserved1; nd_uint32_t framing_cap; nd_uint32_t bearer_cap; nd_uint16_t max_channel; nd_uint16_t firm_rev; nd_byte hostname[64]; nd_byte vendor[64]; }; struct pptp_msg_sccrp { nd_uint16_t proto_ver; nd_uint8_t result_code; nd_uint8_t err_code; nd_uint32_t framing_cap; nd_uint32_t bearer_cap; nd_uint16_t max_channel; nd_uint16_t firm_rev; nd_byte hostname[64]; nd_byte vendor[64]; }; struct pptp_msg_stopccrq { nd_uint8_t reason; nd_uint8_t reserved1; nd_uint16_t reserved2; }; struct pptp_msg_stopccrp { nd_uint8_t result_code; nd_uint8_t err_code; nd_uint16_t reserved1; }; struct pptp_msg_echorq { nd_uint32_t id; }; struct pptp_msg_echorp { nd_uint32_t id; nd_uint8_t result_code; nd_uint8_t err_code; nd_uint16_t reserved1; }; struct pptp_msg_ocrq { nd_uint16_t call_id; nd_uint16_t call_ser; nd_uint32_t min_bps; nd_uint32_t max_bps; nd_uint32_t bearer_type; nd_uint32_t framing_type; nd_uint16_t recv_winsiz; nd_uint16_t pkt_proc_delay; nd_uint16_t phone_no_len; nd_uint16_t reserved1; nd_byte phone_no[64]; nd_byte subaddr[64]; }; struct pptp_msg_ocrp { nd_uint16_t call_id; nd_uint16_t peer_call_id; nd_uint8_t result_code; nd_uint8_t err_code; nd_uint16_t cause_code; nd_uint32_t conn_speed; nd_uint16_t recv_winsiz; nd_uint16_t pkt_proc_delay; nd_uint32_t phy_chan_id; }; struct pptp_msg_icrq { nd_uint16_t call_id; nd_uint16_t call_ser; nd_uint32_t bearer_type; nd_uint32_t phy_chan_id; nd_uint16_t dialed_no_len; nd_uint16_t dialing_no_len; nd_byte dialed_no[64]; /* DNIS */ nd_byte dialing_no[64]; /* CLID */ nd_byte subaddr[64]; }; struct pptp_msg_icrp { nd_uint16_t call_id; nd_uint16_t peer_call_id; nd_uint8_t result_code; nd_uint8_t err_code; nd_uint16_t recv_winsiz; nd_uint16_t pkt_proc_delay; nd_uint16_t reserved1; }; struct pptp_msg_iccn { nd_uint16_t peer_call_id; nd_uint16_t reserved1; nd_uint32_t conn_speed; nd_uint16_t recv_winsiz; nd_uint16_t pkt_proc_delay; nd_uint32_t framing_type; }; struct pptp_msg_ccrq { nd_uint16_t call_id; nd_uint16_t reserved1; }; struct pptp_msg_cdn { nd_uint16_t call_id; nd_uint8_t result_code; nd_uint8_t err_code; nd_uint16_t cause_code; nd_uint16_t reserved1; nd_byte call_stats[128]; }; struct pptp_msg_wen { nd_uint16_t peer_call_id; nd_uint16_t reserved1; nd_uint32_t crc_err; nd_uint32_t framing_err; nd_uint32_t hardware_overrun; nd_uint32_t buffer_overrun; nd_uint32_t timeout_err; nd_uint32_t align_err; }; struct pptp_msg_sli { nd_uint16_t peer_call_id; nd_uint16_t reserved1; nd_uint32_t send_accm; nd_uint32_t recv_accm; }; /* attributes that appear more than once in above messages: Number of occurrence attributes -------------------------------------- 2 uint32_t bearer_cap; 2 uint32_t bearer_type; 6 uint16_t call_id; 2 uint16_t call_ser; 2 uint16_t cause_code; 2 uint32_t conn_speed; 6 uint8_t err_code; 2 uint16_t firm_rev; 2 uint32_t framing_cap; 2 uint32_t framing_type; 2 u_char hostname[64]; 2 uint32_t id; 2 uint16_t max_channel; 5 uint16_t peer_call_id; 2 uint32_t phy_chan_id; 4 uint16_t pkt_proc_delay; 2 uint16_t proto_ver; 4 uint16_t recv_winsiz; 2 uint8_t reserved1; 9 uint16_t reserved1; 6 uint8_t result_code; 2 u_char subaddr[64]; 2 u_char vendor[64]; so I will prepare print out functions for these attributes (except for reserved*). */ #define PRINT_RESERVED_IF_NOT_ZERO_1(reserved) \ if (GET_U_1(reserved)) \ ND_PRINT(" [ERROR: reserved=%u must be zero]", \ GET_U_1(reserved)); #define PRINT_RESERVED_IF_NOT_ZERO_2(reserved) \ if (GET_BE_U_2(reserved)) \ ND_PRINT(" [ERROR: reserved=%u must be zero]", \ GET_BE_U_2(reserved)); /******************************************/ /* Attribute-specific print out functions */ /******************************************/ static void pptp_bearer_cap_print(netdissect_options *ndo, const nd_uint32_t bearer_cap) { ND_PRINT(" BEARER_CAP(%s%s)", GET_BE_U_4(bearer_cap) & PPTP_BEARER_CAP_DIGITAL_MASK ? "D" : "", GET_BE_U_4(bearer_cap) & PPTP_BEARER_CAP_ANALOG_MASK ? "A" : ""); } static const struct tok pptp_btype_str[] = { { 1, "A" }, /* Analog */ { 2, "D" }, /* Digital */ { 3, "Any" }, { 0, NULL } }; static void pptp_bearer_type_print(netdissect_options *ndo, const nd_uint32_t bearer_type) { ND_PRINT(" BEARER_TYPE(%s)", tok2str(pptp_btype_str, "?", GET_BE_U_4(bearer_type))); } static void pptp_call_id_print(netdissect_options *ndo, const nd_uint16_t call_id) { ND_PRINT(" CALL_ID(%u)", GET_BE_U_2(call_id)); } static void pptp_call_ser_print(netdissect_options *ndo, const nd_uint16_t call_ser) { ND_PRINT(" CALL_SER_NUM(%u)", GET_BE_U_2(call_ser)); } static void pptp_cause_code_print(netdissect_options *ndo, const nd_uint16_t cause_code) { ND_PRINT(" CAUSE_CODE(%u)", GET_BE_U_2(cause_code)); } static void pptp_conn_speed_print(netdissect_options *ndo, const nd_uint32_t conn_speed) { ND_PRINT(" CONN_SPEED(%u)", GET_BE_U_4(conn_speed)); } static const struct tok pptp_errcode_str[] = { { 0, "None" }, { 1, "Not-Connected" }, { 2, "Bad-Format" }, { 3, "Bad-Value" }, { 4, "No-Resource" }, { 5, "Bad-Call-ID" }, { 6, "PAC-Error" }, { 0, NULL } }; static void pptp_err_code_print(netdissect_options *ndo, const nd_uint8_t err_code) { ND_PRINT(" ERR_CODE(%u", GET_U_1(err_code)); if (ndo->ndo_vflag) { ND_PRINT(":%s", tok2str(pptp_errcode_str, "?", GET_U_1(err_code))); } ND_PRINT(")"); } static void pptp_firm_rev_print(netdissect_options *ndo, const nd_uint16_t firm_rev) { ND_PRINT(" FIRM_REV(%u)", GET_BE_U_2(firm_rev)); } static void pptp_framing_cap_print(netdissect_options *ndo, const nd_uint32_t framing_cap) { ND_PRINT(" FRAME_CAP("); if (GET_BE_U_4(framing_cap) & PPTP_FRAMING_CAP_ASYNC_MASK) { ND_PRINT("A"); /* Async */ } if (GET_BE_U_4(framing_cap) & PPTP_FRAMING_CAP_SYNC_MASK) { ND_PRINT("S"); /* Sync */ } ND_PRINT(")"); } static const struct tok pptp_ftype_str[] = { { 1, "A" }, /* Async */ { 2, "S" }, /* Sync */ { 3, "E" }, /* Either */ { 0, NULL } }; static void pptp_framing_type_print(netdissect_options *ndo, const nd_uint32_t framing_type) { ND_PRINT(" FRAME_TYPE(%s)", tok2str(pptp_ftype_str, "?", GET_BE_U_4(framing_type))); } static void pptp_hostname_print(netdissect_options *ndo, const u_char *hostname) { ND_PRINT(" HOSTNAME("); nd_printjnp(ndo, hostname, 64); ND_PRINT(")"); } static void pptp_id_print(netdissect_options *ndo, const nd_uint32_t id) { ND_PRINT(" ID(%u)", GET_BE_U_4(id)); } static void pptp_max_channel_print(netdissect_options *ndo, const nd_uint16_t max_channel) { ND_PRINT(" MAX_CHAN(%u)", GET_BE_U_2(max_channel)); } static void pptp_peer_call_id_print(netdissect_options *ndo, const nd_uint16_t peer_call_id) { ND_PRINT(" PEER_CALL_ID(%u)", GET_BE_U_2(peer_call_id)); } static void pptp_phy_chan_id_print(netdissect_options *ndo, const nd_uint32_t phy_chan_id) { ND_PRINT(" PHY_CHAN_ID(%u)", GET_BE_U_4(phy_chan_id)); } static void pptp_pkt_proc_delay_print(netdissect_options *ndo, const nd_uint16_t pkt_proc_delay) { ND_PRINT(" PROC_DELAY(%u)", GET_BE_U_2(pkt_proc_delay)); } static void pptp_proto_ver_print(netdissect_options *ndo, const nd_uint16_t proto_ver) { ND_PRINT(" PROTO_VER(%u.%u)", /* Version.Revision */ GET_BE_U_2(proto_ver) >> 8, GET_BE_U_2(proto_ver) & 0xff); } static void pptp_recv_winsiz_print(netdissect_options *ndo, const nd_uint16_t recv_winsiz) { ND_PRINT(" RECV_WIN(%u)", GET_BE_U_2(recv_winsiz)); } static const struct tok pptp_scrrp_str[] = { { 1, "Successful channel establishment" }, { 2, "General error" }, { 3, "Command channel already exists" }, { 4, "Requester is not authorized to establish a command channel" }, { 5, "The protocol version of the requester is not supported" }, { 0, NULL } }; static const struct tok pptp_echorp_str[] = { { 1, "OK" }, { 2, "General Error" }, { 0, NULL } }; static const struct tok pptp_ocrp_str[] = { { 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 struct tok pptp_icrp_str[] = { { 1, "Connect" }, { 2, "General Error" }, { 3, "Do Not Accept" }, { 0, NULL } }; static const struct tok pptp_cdn_str[] = { { 1, "Lost Carrier" }, { 2, "General Error" }, { 3, "Admin Shutdown" }, { 4, "Request" }, { 0, NULL } }; static void pptp_result_code_print(netdissect_options *ndo, const nd_uint8_t result_code, int ctrl_msg_type) { ND_PRINT(" RESULT_CODE(%u", GET_U_1(result_code)); if (ndo->ndo_vflag) { const struct tok *dict = ctrl_msg_type == PPTP_CTRL_MSG_TYPE_SCCRP ? pptp_scrrp_str : ctrl_msg_type == PPTP_CTRL_MSG_TYPE_StopCCRP ? pptp_echorp_str : ctrl_msg_type == PPTP_CTRL_MSG_TYPE_ECHORP ? pptp_echorp_str : ctrl_msg_type == PPTP_CTRL_MSG_TYPE_OCRP ? pptp_ocrp_str : ctrl_msg_type == PPTP_CTRL_MSG_TYPE_ICRP ? pptp_icrp_str : ctrl_msg_type == PPTP_CTRL_MSG_TYPE_CDN ? pptp_cdn_str : NULL; /* assertion error */ if (dict != NULL) ND_PRINT(":%s", tok2str(dict, "?", GET_U_1(result_code))); } ND_PRINT(")"); } static void pptp_subaddr_print(netdissect_options *ndo, const u_char *subaddr) { ND_PRINT(" SUB_ADDR("); nd_printjnp(ndo, subaddr, 64); ND_PRINT(")"); } static void pptp_vendor_print(netdissect_options *ndo, const u_char *vendor) { ND_PRINT(" VENDOR("); nd_printjnp(ndo, vendor, 64); ND_PRINT(")"); } /************************************/ /* PPTP message print out functions */ /************************************/ static void pptp_sccrq_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_sccrq *ptr = (const struct pptp_msg_sccrq *)dat; pptp_proto_ver_print(ndo, ptr->proto_ver); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); pptp_framing_cap_print(ndo, ptr->framing_cap); pptp_bearer_cap_print(ndo, ptr->bearer_cap); pptp_max_channel_print(ndo, ptr->max_channel); pptp_firm_rev_print(ndo, ptr->firm_rev); pptp_hostname_print(ndo, ptr->hostname); pptp_vendor_print(ndo, ptr->vendor); } static void pptp_sccrp_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_sccrp *ptr = (const struct pptp_msg_sccrp *)dat; pptp_proto_ver_print(ndo, ptr->proto_ver); pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_SCCRP); pptp_err_code_print(ndo, ptr->err_code); pptp_framing_cap_print(ndo, ptr->framing_cap); pptp_bearer_cap_print(ndo, ptr->bearer_cap); pptp_max_channel_print(ndo, ptr->max_channel); pptp_firm_rev_print(ndo, ptr->firm_rev); pptp_hostname_print(ndo, ptr->hostname); pptp_vendor_print(ndo, ptr->vendor); } static void pptp_stopccrq_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_stopccrq *ptr = (const struct pptp_msg_stopccrq *)dat; ND_PRINT(" REASON(%u", GET_U_1(ptr->reason)); if (ndo->ndo_vflag) { switch (GET_U_1(ptr->reason)) { case 1: ND_PRINT(":None"); break; case 2: ND_PRINT(":Stop-Protocol"); break; case 3: ND_PRINT(":Stop-Local-Shutdown"); break; default: ND_PRINT(":?"); break; } } ND_PRINT(")"); PRINT_RESERVED_IF_NOT_ZERO_1(ptr->reserved1); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved2); } static void pptp_stopccrp_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_stopccrp *ptr = (const struct pptp_msg_stopccrp *)dat; pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_StopCCRP); pptp_err_code_print(ndo, ptr->err_code); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); } static void pptp_echorq_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_echorq *ptr = (const struct pptp_msg_echorq *)dat; pptp_id_print(ndo, ptr->id); } static void pptp_echorp_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_echorp *ptr = (const struct pptp_msg_echorp *)dat; pptp_id_print(ndo, ptr->id); pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_ECHORP); pptp_err_code_print(ndo, ptr->err_code); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); } static void pptp_ocrq_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_ocrq *ptr = (const struct pptp_msg_ocrq *)dat; pptp_call_id_print(ndo, ptr->call_id); pptp_call_ser_print(ndo, ptr->call_ser); ND_PRINT(" MIN_BPS(%u)", GET_BE_U_4(ptr->min_bps)); ND_PRINT(" MAX_BPS(%u)", GET_BE_U_4(ptr->max_bps)); pptp_bearer_type_print(ndo, ptr->bearer_type); pptp_framing_type_print(ndo, ptr->framing_type); pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); ND_PRINT(" PHONE_NO_LEN(%u)", GET_BE_U_2(ptr->phone_no_len)); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); ND_PRINT(" PHONE_NO("); nd_printjnp(ndo, ptr->phone_no, ND_MIN(64, GET_BE_U_2(ptr->phone_no_len))); ND_PRINT(")"); pptp_subaddr_print(ndo, ptr->subaddr); } static void pptp_ocrp_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_ocrp *ptr = (const struct pptp_msg_ocrp *)dat; pptp_call_id_print(ndo, ptr->call_id); pptp_peer_call_id_print(ndo, ptr->peer_call_id); pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_OCRP); pptp_err_code_print(ndo, ptr->err_code); pptp_cause_code_print(ndo, ptr->cause_code); pptp_conn_speed_print(ndo, ptr->conn_speed); pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); pptp_phy_chan_id_print(ndo, ptr->phy_chan_id); } static void pptp_icrq_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_icrq *ptr = (const struct pptp_msg_icrq *)dat; pptp_call_id_print(ndo, ptr->call_id); pptp_call_ser_print(ndo, ptr->call_ser); pptp_bearer_type_print(ndo, ptr->bearer_type); pptp_phy_chan_id_print(ndo, ptr->phy_chan_id); ND_PRINT(" DIALED_NO_LEN(%u)", GET_BE_U_2(ptr->dialed_no_len)); ND_PRINT(" DIALING_NO_LEN(%u)", GET_BE_U_2(ptr->dialing_no_len)); ND_PRINT(" DIALED_NO("); nd_printjnp(ndo, ptr->dialed_no, ND_MIN(64, GET_BE_U_2(ptr->dialed_no_len))); ND_PRINT(")"); ND_PRINT(" DIALING_NO("); nd_printjnp(ndo, ptr->dialing_no, ND_MIN(64, GET_BE_U_2(ptr->dialing_no_len))); ND_PRINT(")"); pptp_subaddr_print(ndo, ptr->subaddr); } static void pptp_icrp_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_icrp *ptr = (const struct pptp_msg_icrp *)dat; pptp_call_id_print(ndo, ptr->call_id); pptp_peer_call_id_print(ndo, ptr->peer_call_id); pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_ICRP); pptp_err_code_print(ndo, ptr->err_code); pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); } static void pptp_iccn_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_iccn *ptr = (const struct pptp_msg_iccn *)dat; pptp_peer_call_id_print(ndo, ptr->peer_call_id); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); pptp_conn_speed_print(ndo, ptr->conn_speed); pptp_recv_winsiz_print(ndo, ptr->recv_winsiz); pptp_pkt_proc_delay_print(ndo, ptr->pkt_proc_delay); pptp_framing_type_print(ndo, ptr->framing_type); } static void pptp_ccrq_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_ccrq *ptr = (const struct pptp_msg_ccrq *)dat; pptp_call_id_print(ndo, ptr->call_id); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); } static void pptp_cdn_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_cdn *ptr = (const struct pptp_msg_cdn *)dat; pptp_call_id_print(ndo, ptr->call_id); pptp_result_code_print(ndo, ptr->result_code, PPTP_CTRL_MSG_TYPE_CDN); pptp_err_code_print(ndo, ptr->err_code); pptp_cause_code_print(ndo, ptr->cause_code); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); ND_PRINT(" CALL_STATS("); nd_printjnp(ndo, ptr->call_stats, 128); ND_PRINT(")"); } static void pptp_wen_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_wen *ptr = (const struct pptp_msg_wen *)dat; pptp_peer_call_id_print(ndo, ptr->peer_call_id); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); ND_PRINT(" CRC_ERR(%u)", GET_BE_U_4(ptr->crc_err)); ND_PRINT(" FRAMING_ERR(%u)", GET_BE_U_4(ptr->framing_err)); ND_PRINT(" HARDWARE_OVERRUN(%u)", GET_BE_U_4(ptr->hardware_overrun)); ND_PRINT(" BUFFER_OVERRUN(%u)", GET_BE_U_4(ptr->buffer_overrun)); ND_PRINT(" TIMEOUT_ERR(%u)", GET_BE_U_4(ptr->timeout_err)); ND_PRINT(" ALIGN_ERR(%u)", GET_BE_U_4(ptr->align_err)); } static void pptp_sli_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_msg_sli *ptr = (const struct pptp_msg_sli *)dat; pptp_peer_call_id_print(ndo, ptr->peer_call_id); PRINT_RESERVED_IF_NOT_ZERO_2(ptr->reserved1); ND_PRINT(" SEND_ACCM(0x%08x)", GET_BE_U_4(ptr->send_accm)); ND_PRINT(" RECV_ACCM(0x%08x)", GET_BE_U_4(ptr->recv_accm)); } void pptp_print(netdissect_options *ndo, const u_char *dat) { const struct pptp_hdr *hdr; uint32_t mc; uint16_t ctrl_msg_type; ndo->ndo_protocol = "pptp"; ND_PRINT(": "); nd_print_protocol(ndo); hdr = (const struct pptp_hdr *)dat; if (ndo->ndo_vflag) { ND_PRINT(" Length=%u", GET_BE_U_2(hdr->length)); } if (ndo->ndo_vflag) { switch(GET_BE_U_2(hdr->msg_type)) { case PPTP_MSG_TYPE_CTRL: ND_PRINT(" CTRL-MSG"); break; case PPTP_MSG_TYPE_MGMT: ND_PRINT(" MGMT-MSG"); break; default: ND_PRINT(" UNKNOWN-MSG-TYPE"); break; } } mc = GET_BE_U_4(hdr->magic_cookie); if (mc != PPTP_MAGIC_COOKIE) { ND_PRINT(" UNEXPECTED Magic-Cookie!!(%08x)", mc); } if (ndo->ndo_vflag || mc != PPTP_MAGIC_COOKIE) { ND_PRINT(" Magic-Cookie=%08x", mc); } ctrl_msg_type = GET_BE_U_2(hdr->ctrl_msg_type); if (ctrl_msg_type < PPTP_MAX_MSGTYPE_INDEX) { ND_PRINT(" CTRL_MSGTYPE=%s", pptp_message_type_string[ctrl_msg_type]); } else { ND_PRINT(" UNKNOWN_CTRL_MSGTYPE(%u)", ctrl_msg_type); } PRINT_RESERVED_IF_NOT_ZERO_2(hdr->reserved0); dat += 12; switch(ctrl_msg_type) { case PPTP_CTRL_MSG_TYPE_SCCRQ: pptp_sccrq_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_SCCRP: pptp_sccrp_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_StopCCRQ: pptp_stopccrq_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_StopCCRP: pptp_stopccrp_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_ECHORQ: pptp_echorq_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_ECHORP: pptp_echorp_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_OCRQ: pptp_ocrq_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_OCRP: pptp_ocrp_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_ICRQ: pptp_icrq_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_ICRP: pptp_icrp_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_ICCN: pptp_iccn_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_CCRQ: pptp_ccrq_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_CDN: pptp_cdn_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_WEN: pptp_wen_print(ndo, dat); break; case PPTP_CTRL_MSG_TYPE_SLI: pptp_sli_print(ndo, dat); break; default: /* do nothing */ break; } }