forked from osmocom/wireshark
382 lines
12 KiB
C
382 lines
12 KiB
C
/* packet-ppp.c
|
|
* Routines for ppp packet disassembly
|
|
*
|
|
* $Id: packet-ppp.c,v 1.11 1999/06/11 15:30:39 gram Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@zing.org>
|
|
*
|
|
* This file created and by Mike Hall <mlh@io.com>
|
|
* Copyright 1998
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_TYPES_H
|
|
# include <sys/types.h>
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include "packet.h"
|
|
|
|
/* PPP structs and definitions */
|
|
|
|
typedef struct _e_ppphdr {
|
|
guint8 ppp_addr;
|
|
guint8 ppp_ctl;
|
|
guint16 ppp_prot;
|
|
} e_ppphdr;
|
|
|
|
|
|
/* Protocol types, from Linux "ppp_defs.h" and
|
|
|
|
http://www.isi.edu/in-notes/iana/assignments/ppp-numbers
|
|
|
|
*/
|
|
#define PPP_IP 0x21 /* Internet Protocol */
|
|
#define PPP_AT 0x29 /* AppleTalk Protocol */
|
|
#define PPP_IPX 0x2b /* IPX protocol */
|
|
#define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
|
|
#define PPP_VJC_UNCOMP 0x2f /* VJ uncompressed TCP */
|
|
#define PPP_VINES 0x35 /* Banyan Vines */
|
|
#define PPP_IPV6 0x57 /* Internet Protocol Version 6 */
|
|
#define PPP_COMP 0xfd /* compressed packet */
|
|
#define PPP_IPCP 0x8021 /* IP Control Protocol */
|
|
#define PPP_ATCP 0x8029 /* AppleTalk Control Protocol */
|
|
#define PPP_IPXCP 0x802b /* IPX Control Protocol */
|
|
#define PPP_CCP 0x80fd /* Compression Control Protocol */
|
|
#define PPP_LCP 0xc021 /* Link Control Protocol */
|
|
#define PPP_PAP 0xc023 /* Password Authentication Protocol */
|
|
#define PPP_LQR 0xc025 /* Link Quality Report protocol */
|
|
#define PPP_CHAP 0xc223 /* Cryptographic Handshake Auth. Protocol */
|
|
#define PPP_CBCP 0xc029 /* Callback Control Protocol */
|
|
|
|
|
|
static const value_string ppp_vals[] = {
|
|
{PPP_IP, "IP" },
|
|
{PPP_AT, "Appletalk" },
|
|
{PPP_IPX, "Netware IPX/SPX"},
|
|
{PPP_VJC_COMP, "VJ compressed TCP"},
|
|
{PPP_VJC_UNCOMP,"VJ uncompressed TCP"},
|
|
{PPP_VINES, "Vines" },
|
|
{PPP_IPV6, "IPv6" },
|
|
{PPP_COMP, "compressed packet" },
|
|
{PPP_IPCP, "IP Control Protocol" },
|
|
{PPP_ATCP, "AppleTalk Control Protocol" },
|
|
{PPP_IPXCP, "IPX Control Protocol" },
|
|
{PPP_CCP, "Compression Control Protocol" },
|
|
{PPP_LCP, "Link Control Protocol" },
|
|
{PPP_PAP, "Password Authentication Protocol" },
|
|
{PPP_LQR, "Link Quality Report protocol" },
|
|
{PPP_CHAP, "Cryptographic Handshake Auth. Protocol" },
|
|
{PPP_CBCP, "Callback Control Protocol" },
|
|
{0, NULL } };
|
|
|
|
/* CP (LCP, IPCP, etc.) codes.
|
|
* from pppd fsm.h
|
|
*/
|
|
#define CONFREQ 1 /* Configuration Request */
|
|
#define CONFACK 2 /* Configuration Ack */
|
|
#define CONFNAK 3 /* Configuration Nak */
|
|
#define CONFREJ 4 /* Configuration Reject */
|
|
#define TERMREQ 5 /* Termination Request */
|
|
#define TERMACK 6 /* Termination Ack */
|
|
#define CODEREJ 7 /* Code Reject */
|
|
|
|
static const value_string cp_vals[] = {
|
|
{CONFREQ, "Configuration Request " },
|
|
{CONFACK, "Configuration Ack " },
|
|
{CONFNAK, "Configuration Nak " },
|
|
{CONFREJ, "Configuration Reject " },
|
|
{TERMREQ, "Termination Request " },
|
|
{TERMACK, "Termination Ack " },
|
|
{CODEREJ, "Code Reject " },
|
|
{0, NULL } };
|
|
|
|
/*
|
|
* LCP-specific packet types.
|
|
*/
|
|
#define PROTREJ 8 /* Protocol Reject */
|
|
#define ECHOREQ 9 /* Echo Request */
|
|
#define ECHOREP 10 /* Echo Reply */
|
|
#define DISCREQ 11 /* Discard Request */
|
|
#define CBCP_OPT 6 /* Use callback control protocol */
|
|
|
|
static const value_string lcp_vals[] = {
|
|
{CONFREQ, "Configuration Request " },
|
|
{CONFACK, "Configuration Ack " },
|
|
{CONFNAK, "Configuration Nak " },
|
|
{CONFREJ, "Configuration Reject " },
|
|
{TERMREQ, "Termination Request " },
|
|
{TERMACK, "Termination Ack " },
|
|
{CODEREJ, "Code Reject " },
|
|
{PROTREJ, "Protocol Reject " },
|
|
{ECHOREQ, "Echo Request " },
|
|
{ECHOREP, "Echo Reply " },
|
|
{DISCREQ, "Discard Request " },
|
|
{CBCP_OPT, "Use callback control protocol" },
|
|
{0, NULL } };
|
|
|
|
/*
|
|
* Options. (LCP)
|
|
*/
|
|
#define CI_MRU 1 /* Maximum Receive Unit */
|
|
#define CI_ASYNCMAP 2 /* Async Control Character Map */
|
|
#define CI_AUTHTYPE 3 /* Authentication Type */
|
|
#define CI_QUALITY 4 /* Quality Protocol */
|
|
#define CI_MAGICNUMBER 5 /* Magic Number */
|
|
#define CI_PCOMPRESSION 7 /* Protocol Field Compression */
|
|
#define CI_ACCOMPRESSION 8 /* Address/Control Field Compression */
|
|
#define CI_CALLBACK 13 /* callback */
|
|
|
|
static const value_string lcp_opt_vals[] = {
|
|
{CI_MRU, "Maximum Receive Unit" },
|
|
{CI_ASYNCMAP, "Async Control Character Map" },
|
|
{CI_AUTHTYPE, "Authentication Type" },
|
|
{CI_QUALITY, "Quality Protocol" },
|
|
{CI_MAGICNUMBER, "Magic Number" },
|
|
{CI_PCOMPRESSION, "Protocol Field Compression" },
|
|
{CI_ACCOMPRESSION,"Address/Control Field Compression" },
|
|
{CI_CALLBACK, "callback" },
|
|
{0, NULL } };
|
|
|
|
/*
|
|
* Options. (IPCP)
|
|
*/
|
|
#define CI_ADDRS 1 /* IP Addresses */
|
|
#define CI_COMPRESSTYPE 2 /* Compression Type */
|
|
#define CI_ADDR 3
|
|
#define CI_MS_DNS1 129 /* Primary DNS value */
|
|
#define CI_MS_WINS1 130 /* Primary WINS value */
|
|
#define CI_MS_DNS2 131 /* Secondary DNS value */
|
|
#define CI_MS_WINS2 132 /* Secondary WINS value */
|
|
|
|
static const value_string ipcp_opt_vals[] = {
|
|
{CI_ADDRS, "IP Addresses" },
|
|
{CI_COMPRESSTYPE,"Compression Type" },
|
|
{CI_ADDR, "Address" },
|
|
{CI_MS_DNS1, "Primary DNS value" },
|
|
{CI_MS_WINS1, "Primary WINS value" },
|
|
{CI_MS_DNS2, "Secondary DNS value" },
|
|
{CI_MS_WINS2, "Secondary WINS value" },
|
|
{0, NULL } };
|
|
|
|
void
|
|
capture_ppp( const u_char *pd, guint32 cap_len, packet_counts *ld ) {
|
|
switch (pntohs(&pd[2])) {
|
|
case PPP_IP:
|
|
capture_ip(pd, 4, cap_len, ld);
|
|
break;
|
|
default:
|
|
ld->other++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_ipcp( const u_char *pd, int offset, frame_data *fd, proto_tree *tree ) {
|
|
proto_tree *fh_tree;
|
|
proto_item *ti;
|
|
|
|
int ipcpcode;
|
|
int ipcpid;
|
|
int optionslength;
|
|
|
|
ipcpcode = pd[0+offset];
|
|
ipcpid = pd[1+offset];
|
|
optionslength= pntohs(&pd[2+offset]);
|
|
|
|
if(check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "IPCP %s",
|
|
val_to_str(ipcpcode, cp_vals, "Unknown"));
|
|
|
|
if(tree) {
|
|
ti = proto_tree_add_item(tree, 0+offset, 4, "IP Control Protocol" );
|
|
fh_tree = proto_tree_new();
|
|
proto_item_add_subtree(ti, fh_tree, ETT_IPCP);
|
|
proto_tree_add_item(fh_tree, 0+offset, 1, "Code: %s (0x%02x)",
|
|
val_to_str(ipcpcode, cp_vals, "Unknown"), ipcpcode);
|
|
proto_tree_add_item(fh_tree, 1+offset, 1, "Identifier: 0x%02x",
|
|
ipcpid);
|
|
proto_tree_add_item(fh_tree, 2+offset, 2, "Length: %d",
|
|
optionslength);
|
|
}
|
|
|
|
switch (ipcpcode) {
|
|
/* decode lcp options here. */
|
|
default:
|
|
dissect_data(pd, 4+offset, fd, tree);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_lcp( const u_char *pd, int offset, frame_data *fd, proto_tree *tree ) {
|
|
proto_tree *fh_tree;
|
|
proto_item *ti;
|
|
|
|
int lcpcode;
|
|
int lcpid;
|
|
int optionslength;
|
|
|
|
lcpcode = pd[0+offset];
|
|
lcpid = pd[1+offset];
|
|
optionslength= pntohs(&pd[2+offset]);
|
|
|
|
if(check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "LCP %s",
|
|
val_to_str(lcpcode, lcp_vals, "Unknown"));
|
|
|
|
if(tree) {
|
|
ti = proto_tree_add_item(tree, 0+offset, 4, "Link Control Protocol" );
|
|
fh_tree = proto_tree_new();
|
|
proto_item_add_subtree(ti, fh_tree, ETT_LCP);
|
|
proto_tree_add_item(fh_tree, 0+offset, 1, "Code: %s (0x%02x)",
|
|
val_to_str(lcpcode, lcp_vals, "Unknown"), lcpcode);
|
|
proto_tree_add_item(fh_tree, 1+offset, 1, "Identifier: 0x%02x",
|
|
lcpid);
|
|
proto_tree_add_item(fh_tree, 2+offset, 2, "Length: %d",
|
|
optionslength);
|
|
}
|
|
|
|
switch (lcpcode) {
|
|
/* decode lcp options here. */
|
|
default:
|
|
dissect_data(pd, 4+offset, fd, tree);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_payload_ppp( const u_char *pd, int offset, frame_data *fd, proto_tree *tree ) {
|
|
e_ppphdr ph;
|
|
proto_tree *fh_tree;
|
|
proto_item *ti;
|
|
|
|
/* ph.ppp_addr = pd[0+offset]; */
|
|
/* ph.ppp_ctl = pd[1+offset]; */
|
|
ph.ppp_prot = pntohs(&pd[0+offset]);
|
|
|
|
/* populate a tree in the second pane with the status of the link
|
|
layer (ie none) */
|
|
if(tree) {
|
|
ti = proto_tree_add_item(tree, 0+offset, 2, "Point-to-Point Protocol" );
|
|
fh_tree = proto_tree_new();
|
|
proto_item_add_subtree(ti, fh_tree, ETT_PPP);
|
|
proto_tree_add_item(fh_tree, 0+offset, 2, "Protocol: %s (0x%04x)",
|
|
val_to_str(ph.ppp_prot, ppp_vals, "Unknown"), ph.ppp_prot);
|
|
}
|
|
|
|
switch (ph.ppp_prot) {
|
|
case PPP_IP:
|
|
dissect_ip(pd, 2+offset, fd, tree);
|
|
break;
|
|
case PPP_AT:
|
|
dissect_ddp(pd, 2+offset, fd, tree);
|
|
break;
|
|
case PPP_IPX:
|
|
dissect_ipx(pd, 2+offset, fd, tree);
|
|
break;
|
|
case PPP_VINES:
|
|
dissect_vines(pd, 2+offset, fd, tree);
|
|
break;
|
|
case PPP_IPV6:
|
|
dissect_ipv6(pd, 2+offset, fd, tree);
|
|
break;
|
|
case PPP_LCP:
|
|
dissect_lcp(pd, 2+offset, fd, tree);
|
|
break;
|
|
case PPP_IPCP:
|
|
dissect_ipcp(pd, 2+offset, fd, tree);
|
|
break;
|
|
default:
|
|
dissect_data(pd, 2+offset, fd, tree);
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "PPP %s (0x%04x)",
|
|
val_to_str(ph.ppp_prot, ppp_vals, "Unknown"), ph.ppp_prot);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_ppp( const u_char *pd, frame_data *fd, proto_tree *tree ) {
|
|
e_ppphdr ph;
|
|
proto_tree *fh_tree;
|
|
proto_item *ti;
|
|
|
|
static const value_string ppp_vals[] = {
|
|
{PPP_IP, "IP" },
|
|
{PPP_AT, "Appletalk" },
|
|
{PPP_IPX, "Netware IPX/SPX"},
|
|
{PPP_VINES, "Vines" },
|
|
{PPP_IPV6, "IPv6" },
|
|
{0, NULL } };
|
|
|
|
ph.ppp_addr = pd[0];
|
|
ph.ppp_ctl = pd[1];
|
|
ph.ppp_prot = pntohs(&pd[2]);
|
|
|
|
/* load the top pane info. This should be overwritten by
|
|
the next protocol in the stack */
|
|
|
|
if(check_col(fd, COL_RES_DL_SRC))
|
|
col_add_str(fd, COL_RES_DL_SRC, "N/A" );
|
|
if(check_col(fd, COL_RES_DL_DST))
|
|
col_add_str(fd, COL_RES_DL_DST, "N/A" );
|
|
if(check_col(fd, COL_PROTOCOL))
|
|
col_add_str(fd, COL_PROTOCOL, "N/A" );
|
|
if(check_col(fd, COL_INFO))
|
|
col_add_str(fd, COL_INFO, "PPP" );
|
|
|
|
/* populate a tree in the second pane with the status of the link
|
|
layer (ie none) */
|
|
if(tree) {
|
|
ti = proto_tree_add_item(tree, 0, 4, "Point-to-Point Protocol" );
|
|
fh_tree = proto_tree_new();
|
|
proto_item_add_subtree(ti, fh_tree, ETT_PPP);
|
|
proto_tree_add_item(fh_tree, 0, 1, "Address: %02x", ph.ppp_addr);
|
|
proto_tree_add_item(fh_tree, 1, 1, "Control: %02x", ph.ppp_ctl);
|
|
proto_tree_add_item(fh_tree, 2, 2, "Protocol: %s (0x%04x)",
|
|
val_to_str(ph.ppp_prot, ppp_vals, "Unknown"), ph.ppp_prot);
|
|
}
|
|
|
|
switch (ph.ppp_prot) {
|
|
case PPP_IP:
|
|
dissect_ip(pd, 4, fd, tree);
|
|
break;
|
|
case PPP_AT:
|
|
dissect_ddp(pd, 4, fd, tree);
|
|
break;
|
|
case PPP_IPX:
|
|
dissect_ipx(pd, 4, fd, tree);
|
|
break;
|
|
case PPP_VINES:
|
|
dissect_vines(pd, 4, fd, tree);
|
|
break;
|
|
case PPP_IPV6:
|
|
dissect_ipv6(pd, 4, fd, tree);
|
|
break;
|
|
default:
|
|
dissect_data(pd, 4, fd, tree);
|
|
if (check_col(fd, COL_PROTOCOL))
|
|
col_add_fstr(fd, COL_PROTOCOL, "0x%04x", ph.ppp_prot);
|
|
break;
|
|
}
|
|
}
|