/* $NetBSD: print-pptp.c,v 1.2 2001/06/25 20:00:00 itojun Exp $ */ /* * 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 #if 0 static const char rcsid[] = "@(#) Header: /tcpdump/master/tcpdump/print-pptp.c,v 1.2 2001/03/17 04:41:50 itojun Exp"; #else __RCSID("$NetBSD: print-pptp.c,v 1.2 2001/06/25 20:00:00 itojun Exp $"); #endif #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #include "interface.h" static char tstr[] = " [|pptp]"; #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif #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 /* Aynchronous */ #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 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 { u_int16_t length; u_int16_t msg_type; u_int32_t magic_cookie; u_int16_t ctrl_msg_type; u_int16_t reserved0; }; struct pptp_msg_sccrq { u_int16_t proto_ver; u_int16_t reserved1; u_int32_t framing_cap; u_int32_t bearer_cap; u_int16_t max_channel; u_int16_t firm_rev; u_char hostname[64]; u_char vendor[64]; }; struct pptp_msg_sccrp { u_int16_t proto_ver; u_int8_t result_code; u_int8_t err_code; u_int32_t framing_cap; u_int32_t bearer_cap; u_int16_t max_channel; u_int16_t firm_rev; u_char hostname[64]; u_char vendor[64]; }; struct pptp_msg_stopccrq { u_int8_t reason; u_int8_t reserved1; u_int16_t reserved2; }; struct pptp_msg_stopccrp { u_int8_t result_code; u_int8_t err_code; u_int16_t reserved1; }; struct pptp_msg_echorq { u_int32_t id; }; struct pptp_msg_echorp { u_int32_t id; u_int8_t result_code; u_int8_t err_code; u_int16_t reserved1; }; struct pptp_msg_ocrq { u_int16_t call_id; u_int16_t call_ser; u_int32_t min_bps; u_int32_t max_bps; u_int32_t bearer_type; u_int32_t framing_type; u_int16_t recv_winsiz; u_int16_t pkt_proc_delay; u_int16_t phone_no_len; u_int16_t reserved1; u_char phone_no[64]; u_char subaddr[64]; }; struct pptp_msg_ocrp { u_int16_t call_id; u_int16_t peer_call_id; u_int8_t result_code; u_int8_t err_code; u_int16_t cause_code; u_int32_t conn_speed; u_int16_t recv_winsiz; u_int16_t pkt_proc_delay; u_int32_t phy_chan_id; }; struct pptp_msg_icrq { u_int16_t call_id; u_int16_t call_ser; u_int32_t bearer_type; u_int32_t phy_chan_id; u_int16_t dialed_no_len; u_int16_t dialing_no_len; u_char dialed_no[64]; /* DNIS */ u_char dialing_no[64]; /* CLID */ u_char subaddr[64]; }; struct pptp_msg_icrp { u_int16_t call_id; u_int16_t peer_call_id; u_int8_t result_code; u_int8_t err_code; u_int16_t recv_winsiz; u_int16_t pkt_proc_delay; u_int16_t reserved1; }; struct pptp_msg_iccn { u_int16_t peer_call_id; u_int16_t reserved1; u_int32_t conn_speed; u_int16_t recv_winsiz; u_int16_t pkt_proc_delay; u_int32_t framing_type; }; struct pptp_msg_ccrq { u_int16_t call_id; u_int16_t reserved1; }; struct pptp_msg_cdn { u_int16_t call_id; u_int8_t result_code; u_int8_t err_code; u_int16_t cause_code; u_int16_t reserved1; u_char call_stats[128]; }; struct pptp_msg_wen { u_int16_t peer_call_id; u_int16_t reserved1; u_int32_t crc_err; u_int32_t framing_err; u_int32_t hardware_overrun; u_int32_t buffer_overrun; u_int32_t timeout_err; u_int32_t align_err; }; struct pptp_msg_sli { u_int16_t peer_call_id; u_int16_t reserved1; u_int32_t send_accm; u_int32_t recv_accm; }; /* attributes that appear more than once in above messages: Number of occurence attributes -------------------------------------- 2 u_int32_t bearer_cap; 2 u_int32_t bearer_type; 6 u_int16_t call_id; 2 u_int16_t call_ser; 2 u_int16_t cause_code; 2 u_int32_t conn_speed; 6 u_int8_t err_code; 2 u_int16_t firm_rev; 2 u_int32_t framing_cap; 2 u_int32_t framing_type; 2 u_char hostname[64]; 2 u_int32_t id; 2 u_int16_t max_channel; 5 u_int16_t peer_call_id; 2 u_int32_t phy_chan_id; 4 u_int16_t pkt_proc_delay; 2 u_int16_t proto_ver; 4 u_int16_t recv_winsiz; 2 u_int8_t reserved1; 9 u_int16_t reserved1; 6 u_int8_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*). */ /******************************************/ /* Attribute-specific print out functions */ /******************************************/ /* In these attribute-specific print-out functions, it't not necessary to do TCHECK because they are already checked in the caller of these functions. */ static void pptp_bearer_cap_print(const u_int32_t *bearer_cap) { printf(" BEARER_CAP("); if (ntohl(*bearer_cap) & PPTP_BEARER_CAP_DIGITAL_MASK) { printf("D"); } if (ntohl(*bearer_cap) & PPTP_BEARER_CAP_ANALOG_MASK) { printf("A"); } printf(")"); } static void pptp_bearer_type_print(const u_int32_t *bearer_type) { printf(" BEARER_TYPE("); switch (ntohl(*bearer_type)) { case 1: printf("A"); /* Analog */ break; case 2: printf("D"); /* Digital */ break; case 3: printf("Any"); break; default: printf("?"); break; } printf(")"); } static void pptp_call_id_print(const u_int16_t *call_id) { printf(" CALL_ID(%u)", ntohs(*call_id)); } static void pptp_call_ser_print(const u_int16_t *call_ser) { printf(" CALL_SER_NUM(%u)", ntohs(*call_ser)); } static void pptp_cause_code_print(const u_int16_t *cause_code) { printf(" CAUSE_CODE(%u)", ntohs(*cause_code)); } static void pptp_conn_speed_print(const u_int32_t *conn_speed) { printf(" CONN_SPEED(%lu)", (unsigned long)ntohl(*conn_speed)); } static void pptp_err_code_print(const u_int8_t *err_code) { printf(" ERR_CODE(%u", *err_code); if (vflag) { switch (*err_code) { case 0: printf(":None"); break; case 1: printf(":Not-Connected"); break; case 2: printf(":Bad-Format"); break; case 3: printf(":Bad-Valude"); break; case 4: printf(":No-Resource"); break; case 5: printf(":Bad-Call-ID"); break; case 6: printf(":PAC-Error"); break; default: printf(":?"); break; } } printf(")"); } static void pptp_firm_rev_print(const u_int16_t *firm_rev) { printf(" FIRM_REV(%u)", ntohs(*firm_rev)); } static void pptp_framing_cap_print(const u_int32_t *framing_cap) { printf(" FRAME_CAP("); if (ntohl(*framing_cap) & PPTP_FRAMING_CAP_ASYNC_MASK) { printf("A"); /* Async */ } if (ntohl(*framing_cap) & PPTP_FRAMING_CAP_SYNC_MASK) { printf("S"); /* Sync */ } printf(")"); } static void pptp_framing_type_print(const u_int32_t *framing_type) { printf(" FRAME_TYPE("); switch (ntohl(*framing_type)) { case 1: printf("A"); /* Async */ break; case 2: printf("S"); /* Sync */ break; case 3: printf("E"); /* Either */ break; default: printf("?"); break; } printf(")"); } static void pptp_hostname_print(const u_char *hostname) { printf(" HOSTNAME(%.64s)", hostname); } static void pptp_id_print(const u_int32_t *id) { printf(" ID(%lu)", (unsigned long)ntohl(*id)); } static void pptp_max_channel_print(const u_int16_t *max_channel) { printf(" MAX_CHAN(%u)", ntohs(*max_channel)); } static void pptp_peer_call_id_print(const u_int16_t *peer_call_id) { printf(" PEER_CALL_ID(%u)", ntohs(*peer_call_id)); } static void pptp_phy_chan_id_print(const u_int32_t *phy_chan_id) { printf(" PHY_CHAN_ID(%lu)", (unsigned long)ntohl(*phy_chan_id)); } static void pptp_pkt_proc_delay_print(const u_int16_t *pkt_proc_delay) { printf(" PHY_CHAN_ID(%u)", ntohs(*pkt_proc_delay)); } static void pptp_proto_ver_print(const u_int16_t *proto_ver) { printf(" PROTO_VER(%u.%u)", /* Version.Revision */ ntohs(*proto_ver) >> 8, ntohs(*proto_ver) & 0xff); } static void pptp_recv_winsiz_print(const u_int16_t *recv_winsiz) { printf(" RECV_WIN(%u)", ntohs(*recv_winsiz)); } static void pptp_result_code_print(const u_int8_t *result_code, int ctrl_msg_type) { printf(" RESULT_CODE(%u", *result_code); if (vflag) { switch (ctrl_msg_type) { case PPTP_CTRL_MSG_TYPE_SCCRP: switch (*result_code) { case 1: printf(":Successful channel establishment"); break; case 2: printf(":General error"); break; case 3: printf(":Command channel already exists"); break; case 4: printf(":Requester is not authorized to establish a command channel"); break; case 5: printf(":The protocol version of the requester is not supported"); break; default: printf(":?"); break; } break; case PPTP_CTRL_MSG_TYPE_StopCCRP: case PPTP_CTRL_MSG_TYPE_ECHORP: switch (*result_code) { case 1: printf(":OK"); break; case 2: printf(":General Error"); break; default: printf(":?"); break; } break; case PPTP_CTRL_MSG_TYPE_OCRP: switch (*result_code) { case 1: printf(":Connected"); break; case 2: printf(":General Error"); break; case 3: printf(":No Carrier"); break; case 4: printf(":Busy"); break; case 5: printf(":No Dial Tone"); break; case 6: printf(":Time-out"); break; case 7: printf(":Do Not Accept"); break; default: printf(":?"); break; } break; case PPTP_CTRL_MSG_TYPE_ICRP: switch (*result_code) { case 1: printf(":Connect"); break; case 2: printf(":General Error"); break; case 3: printf(":Do Not Accept"); break; default: printf(":?"); break; } break; case PPTP_CTRL_MSG_TYPE_CDN: switch (*result_code) { case 1: printf(":Lost Carrier"); break; case 2: printf(":General Error"); break; case 3: printf(":Admin Shutdown"); break; case 4: printf(":Request"); default: printf(":?"); break; break; } default: /* assertion error */ break; } } printf(")"); } static void pptp_subaddr_print(const u_char *subaddr) { printf(" SUB_ADDR(%.64s)", subaddr); } static void pptp_vendor_print(const u_char *vendor) { printf(" VENDOR(%.64s)", vendor); } /************************************/ /* PPTP message print out functions */ /************************************/ static void pptp_sccrq_print(const u_char *dat) { struct pptp_msg_sccrq *ptr = (struct pptp_msg_sccrq *)dat; TCHECK(ptr->proto_ver); pptp_proto_ver_print(&ptr->proto_ver); TCHECK(ptr->reserved1); TCHECK(ptr->framing_cap); pptp_framing_cap_print(&ptr->framing_cap); TCHECK(ptr->bearer_cap); pptp_bearer_cap_print(&ptr->bearer_cap); TCHECK(ptr->max_channel); pptp_max_channel_print(&ptr->max_channel); TCHECK(ptr->firm_rev); pptp_firm_rev_print(&ptr->firm_rev); TCHECK(ptr->hostname); pptp_hostname_print(&ptr->hostname[0]); TCHECK(ptr->vendor); pptp_vendor_print(&ptr->vendor[0]); return; trunc: printf("%s", tstr); } static void pptp_sccrp_print(const u_char *dat) { struct pptp_msg_sccrp *ptr = (struct pptp_msg_sccrp *)dat; TCHECK(ptr->proto_ver); pptp_proto_ver_print(&ptr->proto_ver); TCHECK(ptr->result_code); pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_SCCRP); TCHECK(ptr->err_code); pptp_err_code_print(&ptr->err_code); TCHECK(ptr->framing_cap); pptp_framing_cap_print(&ptr->framing_cap); TCHECK(ptr->bearer_cap); pptp_bearer_cap_print(&ptr->bearer_cap); TCHECK(ptr->max_channel); pptp_max_channel_print(&ptr->max_channel); TCHECK(ptr->firm_rev); pptp_firm_rev_print(&ptr->firm_rev); TCHECK(ptr->hostname); pptp_hostname_print(&ptr->hostname[0]); TCHECK(ptr->vendor); pptp_vendor_print(&ptr->vendor[0]); return; trunc: printf("%s", tstr); } static void pptp_stopccrq_print(const u_char *dat) { struct pptp_msg_stopccrq *ptr = (struct pptp_msg_stopccrq *)dat; TCHECK(ptr->reason); printf(" REASON(%u", ptr->reason); if (vflag) { switch (ptr->reason) { case 1: printf(":None"); break; case 2: printf(":Stop-Protocol"); break; case 3: printf(":Stop-Local-Shutdown"); break; default: printf(":?"); break; } } printf(")"); TCHECK(ptr->reserved1); TCHECK(ptr->reserved2); return; trunc: printf("%s", tstr); } static void pptp_stopccrp_print(const u_char *dat) { struct pptp_msg_stopccrp *ptr = (struct pptp_msg_stopccrp *)dat; TCHECK(ptr->result_code); pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_StopCCRP); TCHECK(ptr->err_code); pptp_err_code_print(&ptr->err_code); TCHECK(ptr->reserved1); return; trunc: printf("%s", tstr); } static void pptp_echorq_print(const u_char *dat) { struct pptp_msg_echorq *ptr = (struct pptp_msg_echorq *)dat; TCHECK(ptr->id); pptp_id_print(&ptr->id); return; trunc: printf("%s", tstr); } static void pptp_echorp_print(const u_char *dat) { struct pptp_msg_echorp *ptr = (struct pptp_msg_echorp *)dat; TCHECK(ptr->id); pptp_id_print(&ptr->id); TCHECK(ptr->result_code); pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_ECHORP); TCHECK(ptr->err_code); pptp_err_code_print(&ptr->err_code); TCHECK(ptr->reserved1); return; trunc: printf("%s", tstr); } static void pptp_ocrq_print(const u_char *dat) { struct pptp_msg_ocrq *ptr = (struct pptp_msg_ocrq *)dat; TCHECK(ptr->call_id); pptp_call_id_print(&ptr->call_id); TCHECK(ptr->call_ser); pptp_call_ser_print(&ptr->call_ser); TCHECK(ptr->min_bps); printf(" MIN_BPS(%lu)", (unsigned long)ntohl(ptr->min_bps)); TCHECK(ptr->max_bps); printf(" MAX_BPS(%lu)", (unsigned long)ntohl(ptr->max_bps)); TCHECK(ptr->bearer_type); pptp_bearer_type_print(&ptr->bearer_type); TCHECK(ptr->framing_type); pptp_framing_type_print(&ptr->framing_type); TCHECK(ptr->recv_winsiz); pptp_recv_winsiz_print(&ptr->recv_winsiz); TCHECK(ptr->pkt_proc_delay); pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay); TCHECK(ptr->phone_no_len); printf(" PHONE_NO_LEN(%u)", ntohs(ptr->phone_no_len)); TCHECK(ptr->reserved1); TCHECK(ptr->phone_no); printf(" PHONE_NO(%.64s)", ptr->phone_no); TCHECK(ptr->subaddr); pptp_subaddr_print(&ptr->subaddr[0]); return; trunc: printf("%s", tstr); } static void pptp_ocrp_print(const u_char *dat) { struct pptp_msg_ocrp *ptr = (struct pptp_msg_ocrp *)dat; TCHECK(ptr->call_id); pptp_call_id_print(&ptr->call_id); TCHECK(ptr->peer_call_id); pptp_peer_call_id_print(&ptr->peer_call_id); TCHECK(ptr->result_code); pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_OCRP); TCHECK(ptr->err_code); pptp_err_code_print(&ptr->err_code); TCHECK(ptr->cause_code); pptp_cause_code_print(&ptr->cause_code); TCHECK(ptr->conn_speed); pptp_conn_speed_print(&ptr->conn_speed); TCHECK(ptr->recv_winsiz); pptp_recv_winsiz_print(&ptr->recv_winsiz); TCHECK(ptr->pkt_proc_delay); pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay); TCHECK(ptr->phy_chan_id); pptp_phy_chan_id_print(&ptr->phy_chan_id); return; trunc: printf("%s", tstr); } static void pptp_icrq_print(const u_char *dat) { struct pptp_msg_icrq *ptr = (struct pptp_msg_icrq *)dat; TCHECK(ptr->call_id); pptp_call_id_print(&ptr->call_id); TCHECK(ptr->call_ser); pptp_call_ser_print(&ptr->call_ser); TCHECK(ptr->bearer_type); pptp_bearer_type_print(&ptr->bearer_type); TCHECK(ptr->phy_chan_id); pptp_phy_chan_id_print(&ptr->phy_chan_id); TCHECK(ptr->dialed_no_len); printf(" DIALED_NO_LEN(%u)", ntohs(ptr->dialed_no_len)); TCHECK(ptr->dialing_no_len); printf(" DIALING_NO_LEN(%u)", ntohs(ptr->dialing_no_len)); TCHECK(ptr->dialed_no); printf(" DIALED_NO(%.64s)", ptr->dialed_no); TCHECK(ptr->dialing_no); printf(" DIALING_NO(%.64s)", ptr->dialing_no); TCHECK(ptr->subaddr); pptp_subaddr_print(&ptr->subaddr[0]); return; trunc: printf("%s", tstr); } static void pptp_icrp_print(const u_char *dat) { struct pptp_msg_icrp *ptr = (struct pptp_msg_icrp *)dat; TCHECK(ptr->call_id); pptp_call_id_print(&ptr->call_id); TCHECK(ptr->peer_call_id); pptp_peer_call_id_print(&ptr->peer_call_id); TCHECK(ptr->result_code); pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_ICRP); TCHECK(ptr->err_code); pptp_err_code_print(&ptr->err_code); TCHECK(ptr->recv_winsiz); pptp_recv_winsiz_print(&ptr->recv_winsiz); TCHECK(ptr->pkt_proc_delay); pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay); TCHECK(ptr->reserved1); return; trunc: printf("%s", tstr); } static void pptp_iccn_print(const u_char *dat) { struct pptp_msg_iccn *ptr = (struct pptp_msg_iccn *)dat; TCHECK(ptr->peer_call_id); pptp_peer_call_id_print(&ptr->peer_call_id); TCHECK(ptr->reserved1); TCHECK(ptr->conn_speed); pptp_conn_speed_print(&ptr->conn_speed); TCHECK(ptr->recv_winsiz); pptp_recv_winsiz_print(&ptr->recv_winsiz); TCHECK(ptr->pkt_proc_delay); pptp_pkt_proc_delay_print(&ptr->pkt_proc_delay); TCHECK(ptr->framing_type); pptp_framing_type_print(&ptr->framing_type); return; trunc: printf("%s", tstr); } static void pptp_ccrq_print(const u_char *dat) { struct pptp_msg_ccrq *ptr = (struct pptp_msg_ccrq *)dat; TCHECK(ptr->call_id); pptp_call_id_print(&ptr->call_id); TCHECK(ptr->reserved1); return; trunc: printf("%s", tstr); } static void pptp_cdn_print(const u_char *dat) { struct pptp_msg_cdn *ptr = (struct pptp_msg_cdn *)dat; TCHECK(ptr->call_id); pptp_call_id_print(&ptr->call_id); TCHECK(ptr->result_code); pptp_result_code_print(&ptr->result_code, PPTP_CTRL_MSG_TYPE_CDN); TCHECK(ptr->err_code); pptp_err_code_print(&ptr->err_code); TCHECK(ptr->cause_code); pptp_cause_code_print(&ptr->cause_code); TCHECK(ptr->reserved1); TCHECK(ptr->call_stats); printf(" CALL_STATS(%.128s)", ptr->call_stats); return; trunc: printf("%s", tstr); } static void pptp_wen_print(const u_char *dat) { struct pptp_msg_wen *ptr = (struct pptp_msg_wen *)dat; TCHECK(ptr->peer_call_id); pptp_peer_call_id_print(&ptr->peer_call_id); TCHECK(ptr->reserved1); TCHECK(ptr->crc_err); printf(" CRC_ERR(%lu)", (unsigned long)ntohl(ptr->crc_err)); TCHECK(ptr->framing_err); printf(" FRAMING_ERR(%lu)", (unsigned long)ntohl(ptr->framing_err)); TCHECK(ptr->hardware_overrun); printf(" HARDWARE_OVERRUN(%lu)", (unsigned long)ntohl(ptr->hardware_overrun)); TCHECK(ptr->buffer_overrun); printf(" BUFFER_OVERRUN(%lu)", (unsigned long)ntohl(ptr->buffer_overrun)); TCHECK(ptr->timeout_err); printf(" TIMEOUT_ERR(%lu)", (unsigned long)ntohl(ptr->timeout_err)); TCHECK(ptr->align_err); printf(" ALIGN_ERR(%lu)", (unsigned long)ntohl(ptr->align_err)); return; trunc: printf("%s", tstr); } static void pptp_sli_print(const u_char *dat) { struct pptp_msg_sli *ptr = (struct pptp_msg_sli *)dat; TCHECK(ptr->peer_call_id); pptp_peer_call_id_print(&ptr->peer_call_id); TCHECK(ptr->reserved1); TCHECK(ptr->send_accm); printf(" SEND_ACCM(0x%08lx)", (unsigned long)ntohl(ptr->send_accm)); TCHECK(ptr->recv_accm); printf(" RECV_ACCM(0x%08lx)", (unsigned long)ntohl(ptr->recv_accm)); return; trunc: printf("%s", tstr); } void pptp_print(const u_char *dat, u_int length) { const struct pptp_hdr *hdr; u_int32_t mc; u_int16_t ctrl_msg_type; printf(": pptp"); hdr = (struct pptp_hdr *)dat; TCHECK(hdr->length); if (vflag) { printf(" Length=%u", ntohs(hdr->length)); } TCHECK(hdr->msg_type); if (vflag) { switch(ntohs(hdr->msg_type)) { case PPTP_MSG_TYPE_CTRL: printf(" CTRL-MSG"); break; case PPTP_MSG_TYPE_MGMT: printf(" MGMT-MSG"); break; default: printf(" UNKNOWN-MSG-TYPE"); break; } } TCHECK(hdr->magic_cookie); mc = ntohl(hdr->magic_cookie); if (mc != PPTP_MAGIC_COOKIE) { printf(" UNEXPECTED Magic-Cookie!!(%08x)", mc); } if (vflag || mc != PPTP_MAGIC_COOKIE) { printf(" Magic-Cookie=%08x", mc); } TCHECK(hdr->ctrl_msg_type); ctrl_msg_type = ntohs(hdr->ctrl_msg_type); if (ctrl_msg_type < PPTP_MAX_MSGTYPE_INDEX) { printf(" CTRL_MSGTYPE=%s", pptp_message_type_string[ctrl_msg_type]); } else { printf(" UNKNOWN_CTRL_MSGTYPE(%u)", ctrl_msg_type); } TCHECK(hdr->reserved0); dat += 12; switch(ctrl_msg_type) { case PPTP_CTRL_MSG_TYPE_SCCRQ: pptp_sccrq_print(dat); break; case PPTP_CTRL_MSG_TYPE_SCCRP: pptp_sccrp_print(dat); break; case PPTP_CTRL_MSG_TYPE_StopCCRQ: pptp_stopccrq_print(dat); break; case PPTP_CTRL_MSG_TYPE_StopCCRP: pptp_stopccrp_print(dat); break; case PPTP_CTRL_MSG_TYPE_ECHORQ: pptp_echorq_print(dat); break; case PPTP_CTRL_MSG_TYPE_ECHORP: pptp_echorp_print(dat); break; case PPTP_CTRL_MSG_TYPE_OCRQ: pptp_ocrq_print(dat); break; case PPTP_CTRL_MSG_TYPE_OCRP: pptp_ocrp_print(dat); break; case PPTP_CTRL_MSG_TYPE_ICRQ: pptp_icrq_print(dat); break; case PPTP_CTRL_MSG_TYPE_ICRP: pptp_icrp_print(dat); break; case PPTP_CTRL_MSG_TYPE_ICCN: pptp_iccn_print(dat); break; case PPTP_CTRL_MSG_TYPE_CCRQ: pptp_ccrq_print(dat); break; case PPTP_CTRL_MSG_TYPE_CDN: pptp_cdn_print(dat); break; case PPTP_CTRL_MSG_TYPE_WEN: pptp_wen_print(dat); break; case PPTP_CTRL_MSG_TYPE_SLI: pptp_sli_print(dat); break; default: /* do nothing */ break; } return; trunc: printf("%s", tstr); }