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tcpdump/print-pptp.c
Francois-Xavier Le Bail 25e59b15e9 PPTP: Use nd_printjnp() instead of nd_printzp() 
Thus the longjmp logic (via GET_U_1) is used when truncation.
2020-11-01 12:59:20 +01:00

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/*
* 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)
*/
/* \summary: Point-to-Point Tunnelling Protocol (PPTP) printer */
/* specification: RFC 2637 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#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 /* 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 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;
}
}
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