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NetBSD/dist/tcpdump/print-juniper.c

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/* $NetBSD: print-juniper.c,v 1.3 2007/07/25 06:31:32 dogcow Exp $ */
/*
* 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, and (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.
* 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.
*
* Original code by Hannes Gredler (hannes@juniper.net)
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char rcsid[] _U_ =
"@(#) Header: /tcpdump/master/tcpdump/print-juniper.c,v 1.8.2.22 2006/05/10 22:42:46 guy Exp (LBL)";
#else
__RCSID("$NetBSD: print-juniper.c,v 1.3 2007/07/25 06:31:32 dogcow Exp $");
#endif
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.h>
#include <pcap.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
#include "ppp.h"
#include "llc.h"
#include "nlpid.h"
#include "ethertype.h"
#include "atm.h"
#define JUNIPER_BPF_OUT 0 /* Outgoing packet */
#define JUNIPER_BPF_IN 1 /* Incoming packet */
#define JUNIPER_BPF_PKT_IN 0x1 /* Incoming packet */
#define JUNIPER_BPF_NO_L2 0x2 /* L2 header stripped */
#define JUNIPER_BPF_EXT 0x80 /* extensions present */
#define JUNIPER_MGC_NUMBER 0x4d4743 /* = "MGC" */
#define JUNIPER_LSQ_COOKIE_RE (1 << 3)
#define JUNIPER_LSQ_COOKIE_DIR (1 << 2)
#define JUNIPER_LSQ_L3_PROTO_SHIFT 4
#define JUNIPER_LSQ_L3_PROTO_MASK (0x17 << JUNIPER_LSQ_L3_PROTO_SHIFT)
#define JUNIPER_LSQ_L3_PROTO_IPV4 (0 << JUNIPER_LSQ_L3_PROTO_SHIFT)
#define JUNIPER_LSQ_L3_PROTO_IPV6 (1 << JUNIPER_LSQ_L3_PROTO_SHIFT)
#define JUNIPER_LSQ_L3_PROTO_MPLS (2 << JUNIPER_LSQ_L3_PROTO_SHIFT)
#define JUNIPER_LSQ_L3_PROTO_ISO (3 << JUNIPER_LSQ_L3_PROTO_SHIFT)
#define AS_PIC_COOKIE_LEN 8
#define JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE 1
#define JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE 2
#define JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE 3
#define JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE 4
#define JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE 5
static struct tok juniper_ipsec_type_values[] = {
{ JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE, "ESP ENCR-AUTH" },
{ JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE, "ESP ENCR-AH AUTH" },
{ JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE, "ESP AUTH" },
{ JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE, "AH AUTH" },
{ JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE, "ESP ENCR" },
{ 0, NULL}
};
static struct tok juniper_direction_values[] = {
{ JUNIPER_BPF_IN, "In"},
{ JUNIPER_BPF_OUT, "Out"},
{ 0, NULL}
};
struct juniper_cookie_table_t {
u_int32_t pictype; /* pic type */
u_int8_t cookie_len; /* cookie len */
const char *s; /* pic name */
};
static struct juniper_cookie_table_t juniper_cookie_table[] = {
#ifdef DLT_JUNIPER_ATM1
{ DLT_JUNIPER_ATM1, 4, "ATM1"},
#endif
#ifdef DLT_JUNIPER_ATM2
{ DLT_JUNIPER_ATM2, 8, "ATM2"},
#endif
#ifdef DLT_JUNIPER_MLPPP
{ DLT_JUNIPER_MLPPP, 2, "MLPPP"},
#endif
#ifdef DLT_JUNIPER_MLFR
{ DLT_JUNIPER_MLFR, 2, "MLFR"},
#endif
#ifdef DLT_JUNIPER_MFR
{ DLT_JUNIPER_MFR, 4, "MFR"},
#endif
#ifdef DLT_JUNIPER_PPPOE
{ DLT_JUNIPER_PPPOE, 0, "PPPoE"},
#endif
#ifdef DLT_JUNIPER_PPPOE_ATM
{ DLT_JUNIPER_PPPOE_ATM, 0, "PPPoE ATM"},
#endif
#ifdef DLT_JUNIPER_GGSN
{ DLT_JUNIPER_GGSN, 8, "GGSN"},
#endif
#ifdef DLT_JUNIPER_MONITOR
{ DLT_JUNIPER_MONITOR, 8, "MONITOR"},
#endif
#ifdef DLT_JUNIPER_SERVICES
{ DLT_JUNIPER_SERVICES, 8, "AS"},
#endif
#ifdef DLT_JUNIPER_ES
{ DLT_JUNIPER_ES, 0, "ES"},
#endif
{ 0, 0, NULL }
};
struct juniper_l2info_t {
u_int32_t length;
u_int32_t caplen;
u_int32_t pictype;
u_int8_t direction;
u_int8_t header_len;
u_int8_t cookie_len;
u_int8_t cookie_type;
u_int8_t cookie[8];
u_int8_t bundle;
u_int16_t proto;
};
#define LS_COOKIE_ID 0x54
#define AS_COOKIE_ID 0x47
#define LS_MLFR_COOKIE_LEN 4
#define ML_MLFR_COOKIE_LEN 2
#define LS_MFR_COOKIE_LEN 6
#define ATM1_COOKIE_LEN 4
#define ATM2_COOKIE_LEN 8
#define ATM2_PKT_TYPE_MASK 0x70
#define ATM2_GAP_COUNT_MASK 0x3F
#define JUNIPER_PROTO_NULL 1
#define JUNIPER_PROTO_IPV4 2
#define JUNIPER_PROTO_IPV6 6
#define MFR_BE_MASK 0xc0
static struct tok juniper_protocol_values[] = {
{ JUNIPER_PROTO_NULL, "Null" },
{ JUNIPER_PROTO_IPV4, "IPv4" },
{ JUNIPER_PROTO_IPV6, "IPv6" },
{ 0, NULL}
};
int ip_heuristic_guess(register const u_char *, u_int);
int juniper_ppp_heuristic_guess(register const u_char *, u_int);
static int juniper_parse_header (const u_char *, const struct pcap_pkthdr *, struct juniper_l2info_t *);
#ifdef DLT_JUNIPER_GGSN
u_int
juniper_ggsn_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_ggsn_header {
u_int8_t svc_id;
u_int8_t flags_len;
u_int8_t proto;
u_int8_t flags;
u_int8_t vlan_id[2];
u_int8_t res[2];
};
const struct juniper_ggsn_header *gh;
l2info.pictype = DLT_JUNIPER_GGSN;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
gh = (struct juniper_ggsn_header *)p;
if (eflag)
printf("proto %s (%u), vlan %u: ",
tok2str(juniper_protocol_values,"Unknown",gh->proto),
gh->proto,
EXTRACT_16BITS(&gh->vlan_id[0]));
switch (gh->proto) {
case JUNIPER_PROTO_IPV4:
ip_print(gndo, p, l2info.length);
break;
#ifdef INET6
case JUNIPER_PROTO_IPV6:
ip6_print(p, l2info.length);
break;
#endif /* INET6 */
default:
if (!eflag)
printf("unknown GGSN proto (%u)", gh->proto);
}
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_ES
u_int
juniper_es_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_ipsec_header {
u_int8_t sa_index[2];
u_int8_t ttl;
u_int8_t type;
u_int8_t spi[4];
u_int8_t src_ip[4];
u_int8_t dst_ip[4];
};
u_int rewrite_len,es_type_bundle;
const struct juniper_ipsec_header *ih;
l2info.pictype = DLT_JUNIPER_ES;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
ih = (struct juniper_ipsec_header *)p;
switch (ih->type) {
case JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE:
case JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE:
rewrite_len = 0;
es_type_bundle = 1;
break;
case JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE:
case JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE:
case JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE:
rewrite_len = 16;
es_type_bundle = 0;
default:
printf("ES Invalid type %u, length %u",
ih->type,
l2info.length);
return l2info.header_len;
}
l2info.length-=rewrite_len;
p+=rewrite_len;
if (eflag) {
if (!es_type_bundle) {
printf("ES SA, index %u, ttl %u type %s (%u), spi %u, Tunnel %s > %s, length %u\n",
EXTRACT_16BITS(&ih->sa_index),
ih->ttl,
tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
ih->type,
EXTRACT_32BITS(&ih->spi),
ipaddr_string(&ih->src_ip),
ipaddr_string(&ih->dst_ip),
l2info.length);
} else {
printf("ES SA, index %u, ttl %u type %s (%u), length %u\n",
EXTRACT_16BITS(&ih->sa_index),
ih->ttl,
tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
ih->type,
l2info.length);
}
}
ip_print(gndo, p, l2info.length);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_MONITOR
u_int
juniper_monitor_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_monitor_header {
u_int8_t pkt_type;
u_int8_t padding;
u_int8_t iif[2];
u_int8_t service_id[4];
};
const struct juniper_monitor_header *mh;
l2info.pictype = DLT_JUNIPER_MONITOR;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
mh = (struct juniper_monitor_header *)p;
if (eflag)
printf("service-id %u, iif %u, pkt-type %u: ",
EXTRACT_32BITS(&mh->service_id),
EXTRACT_16BITS(&mh->iif),
mh->pkt_type);
/* no proto field - lets guess by first byte of IP header*/
ip_heuristic_guess(p, l2info.length);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_SERVICES
u_int
juniper_services_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
struct juniper_services_header {
u_int8_t svc_id;
u_int8_t flags_len;
u_int8_t svc_set_id[2];
u_int8_t dir_iif[4];
};
const struct juniper_services_header *sh;
l2info.pictype = DLT_JUNIPER_SERVICES;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
sh = (struct juniper_services_header *)p;
if (eflag)
printf("service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
sh->svc_id,
sh->flags_len,
EXTRACT_16BITS(&sh->svc_set_id),
EXTRACT_24BITS(&sh->dir_iif[1]));
/* no proto field - lets guess by first byte of IP header*/
ip_heuristic_guess(p, l2info.length);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_PPPOE
u_int
juniper_pppoe_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_PPPOE;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* this DLT contains nothing but raw ethernet frames */
ether_print(p, l2info.length, l2info.caplen);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_ETHER
u_int
juniper_ether_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ETHER;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* this DLT contains nothing but raw Ethernet frames */
ether_print(p, l2info.length, l2info.caplen);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_PPP
u_int
juniper_ppp_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_PPP;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* this DLT contains nothing but raw ppp frames */
ppp_print(p, l2info.length);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_FRELAY
u_int
juniper_frelay_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_FRELAY;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* this DLT contains nothing but raw frame-relay frames */
fr_print(p, l2info.length);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_CHDLC
u_int
juniper_chdlc_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_CHDLC;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* this DLT contains nothing but raw c-hdlc frames */
chdlc_print(p, l2info.length);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_PPPOE_ATM
u_int
juniper_pppoe_atm_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
u_int16_t extracted_ethertype;
l2info.pictype = DLT_JUNIPER_PPPOE_ATM;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
extracted_ethertype = EXTRACT_16BITS(p);
/* this DLT contains nothing but raw PPPoE frames,
* prepended with a type field*/
if (ether_encap_print(extracted_ethertype,
p+ETHERTYPE_LEN,
l2info.length-ETHERTYPE_LEN,
l2info.caplen-ETHERTYPE_LEN,
&extracted_ethertype) == 0)
/* ether_type not known, probably it wasn't one */
printf("unknown ethertype 0x%04x", extracted_ethertype);
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_MLPPP
u_int
juniper_mlppp_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_MLPPP;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
/* suppress Bundle-ID if frame was captured on a child-link
* best indicator if the cookie looks like a proto */
if (eflag &&
EXTRACT_16BITS(&l2info.cookie) != PPP_OSI &&
EXTRACT_16BITS(&l2info.cookie) != (PPP_ADDRESS << 8 | PPP_CONTROL))
printf("Bundle-ID %u: ",l2info.bundle);
p+=l2info.header_len;
/* first try the LSQ protos */
switch(l2info.proto) {
case JUNIPER_LSQ_L3_PROTO_IPV4:
/* IP traffic going to the RE would not have a cookie
* -> this must be incoming IS-IS over PPP
*/
if (l2info.cookie[4] == (JUNIPER_LSQ_COOKIE_RE|JUNIPER_LSQ_COOKIE_DIR))
ppp_print(p, l2info.length);
else
ip_print(gndo, p, l2info.length);
return l2info.header_len;
#ifdef INET6
case JUNIPER_LSQ_L3_PROTO_IPV6:
ip6_print(p,l2info.length);
return l2info.header_len;
#endif
case JUNIPER_LSQ_L3_PROTO_MPLS:
mpls_print(p,l2info.length);
return l2info.header_len;
case JUNIPER_LSQ_L3_PROTO_ISO:
isoclns_print(p,l2info.length,l2info.caplen);
return l2info.header_len;
default:
break;
}
/* zero length cookie ? */
switch (EXTRACT_16BITS(&l2info.cookie)) {
case PPP_OSI:
ppp_print(p-2,l2info.length+2);
break;
case (PPP_ADDRESS << 8 | PPP_CONTROL): /* fall through */
default:
ppp_print(p,l2info.length);
break;
}
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_MFR
u_int
juniper_mfr_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_MFR;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* child-link ? */
if (l2info.cookie_len == 0) {
mfr_print(p,l2info.length);
return l2info.header_len;
}
/* first try the LSQ protos */
if (l2info.cookie_len == AS_PIC_COOKIE_LEN) {
switch(l2info.proto) {
case JUNIPER_LSQ_L3_PROTO_IPV4:
ip_print(gndo, p, l2info.length);
return l2info.header_len;
#ifdef INET6
case JUNIPER_LSQ_L3_PROTO_IPV6:
ip6_print(p,l2info.length);
return l2info.header_len;
#endif
case JUNIPER_LSQ_L3_PROTO_MPLS:
mpls_print(p,l2info.length);
return l2info.header_len;
case JUNIPER_LSQ_L3_PROTO_ISO:
isoclns_print(p,l2info.length,l2info.caplen);
return l2info.header_len;
default:
break;
}
return l2info.header_len;
}
/* suppress Bundle-ID if frame was captured on a child-link */
if (eflag && EXTRACT_32BITS(l2info.cookie) != 1) printf("Bundle-ID %u, ",l2info.bundle);
switch (l2info.proto) {
case (LLCSAP_ISONS<<8 | LLCSAP_ISONS):
isoclns_print(p+1, l2info.length-1, l2info.caplen-1);
break;
case (LLC_UI<<8 | NLPID_Q933):
case (LLC_UI<<8 | NLPID_IP):
case (LLC_UI<<8 | NLPID_IP6):
/* pass IP{4,6} to the OSI layer for proper link-layer printing */
isoclns_print(p-1, l2info.length+1, l2info.caplen+1);
break;
default:
printf("unknown protocol 0x%04x, length %u",l2info.proto, l2info.length);
}
return l2info.header_len;
}
#endif
#ifdef DLT_JUNIPER_MLFR
u_int
juniper_mlfr_print(const struct pcap_pkthdr *h, register const u_char *p)
{
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_MLFR;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
/* suppress Bundle-ID if frame was captured on a child-link */
if (eflag && EXTRACT_32BITS(l2info.cookie) != 1) printf("Bundle-ID %u, ",l2info.bundle);
switch (l2info.proto) {
case (LLC_UI):
case (LLC_UI<<8):
isoclns_print(p, l2info.length, l2info.caplen);
break;
case (LLC_UI<<8 | NLPID_Q933):
case (LLC_UI<<8 | NLPID_IP):
case (LLC_UI<<8 | NLPID_IP6):
/* pass IP{4,6} to the OSI layer for proper link-layer printing */
isoclns_print(p-1, l2info.length+1, l2info.caplen+1);
break;
default:
printf("unknown protocol 0x%04x, length %u",l2info.proto, l2info.length);
}
return l2info.header_len;
}
#endif
/*
* ATM1 PIC cookie format
*
* +-----+-------------------------+-------------------------------+
* |fmtid| vc index | channel ID |
* +-----+-------------------------+-------------------------------+
*/
#ifdef DLT_JUNIPER_ATM1
u_int
juniper_atm1_print(const struct pcap_pkthdr *h, register const u_char *p)
{
u_int16_t extracted_ethertype;
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ATM1;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
if (l2info.cookie[0] == 0x80) { /* OAM cell ? */
oam_print(p,l2info.length,ATM_OAM_NOHEC);
return l2info.header_len;
}
if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
if (llc_print(p, l2info.length, l2info.caplen, NULL, NULL,
&extracted_ethertype) != 0)
return l2info.header_len;
}
if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
isoclns_print(p + 1, l2info.length - 1, l2info.caplen - 1);
/* FIXME check if frame was recognized */
return l2info.header_len;
}
if(ip_heuristic_guess(p, l2info.length) != 0) /* last try - vcmux encaps ? */
return l2info.header_len;
return l2info.header_len;
}
#endif
/*
* ATM2 PIC cookie format
*
* +-------------------------------+---------+---+-----+-----------+
* | channel ID | reserv |AAL| CCRQ| gap cnt |
* +-------------------------------+---------+---+-----+-----------+
*/
#ifdef DLT_JUNIPER_ATM2
u_int
juniper_atm2_print(const struct pcap_pkthdr *h, register const u_char *p)
{
u_int16_t extracted_ethertype;
struct juniper_l2info_t l2info;
l2info.pictype = DLT_JUNIPER_ATM2;
if(juniper_parse_header(p, h, &l2info) == 0)
return l2info.header_len;
p+=l2info.header_len;
if (l2info.cookie[7] & ATM2_PKT_TYPE_MASK) { /* OAM cell ? */
oam_print(p,l2info.length,ATM_OAM_NOHEC);
return l2info.header_len;
}
if (EXTRACT_24BITS(p) == 0xfefe03 || /* NLPID encaps ? */
EXTRACT_24BITS(p) == 0xaaaa03) { /* SNAP encaps ? */
if (llc_print(p, l2info.length, l2info.caplen, NULL, NULL,
&extracted_ethertype) != 0)
return l2info.header_len;
}
if (l2info.direction != JUNIPER_BPF_PKT_IN && /* ether-over-1483 encaps ? */
(EXTRACT_32BITS(l2info.cookie) & ATM2_GAP_COUNT_MASK)) {
ether_print(p, l2info.length, l2info.caplen);
return l2info.header_len;
}
if (p[0] == 0x03) { /* Cisco style NLPID encaps ? */
isoclns_print(p + 1, l2info.length - 1, l2info.caplen - 1);
/* FIXME check if frame was recognized */
return l2info.header_len;
}
if(juniper_ppp_heuristic_guess(p, l2info.length) != 0) /* PPPoA vcmux encaps ? */
return l2info.header_len;
if(ip_heuristic_guess(p, l2info.length) != 0) /* last try - vcmux encaps ? */
return l2info.header_len;
return l2info.header_len;
}
#endif
/* try to guess, based on all PPP protos that are supported in
* a juniper router if the payload data is encapsulated using PPP */
int
juniper_ppp_heuristic_guess(register const u_char *p, u_int length) {
switch(EXTRACT_16BITS(p)) {
case PPP_IP :
case PPP_OSI :
case PPP_MPLS_UCAST :
case PPP_MPLS_MCAST :
case PPP_IPCP :
case PPP_OSICP :
case PPP_MPLSCP :
case PPP_LCP :
case PPP_PAP :
case PPP_CHAP :
case PPP_ML :
#ifdef INET6
case PPP_IPV6 :
case PPP_IPV6CP :
#endif
ppp_print(p, length);
break;
default:
return 0; /* did not find a ppp header */
break;
}
return 1; /* we printed a ppp packet */
}
int
ip_heuristic_guess(register const u_char *p, u_int length) {
switch(p[0]) {
case 0x45:
case 0x46:
case 0x47:
case 0x48:
case 0x49:
case 0x4a:
case 0x4b:
case 0x4c:
case 0x4d:
case 0x4e:
case 0x4f:
ip_print(gndo, p, length);
break;
#ifdef INET6
case 0x60:
case 0x61:
case 0x62:
case 0x63:
case 0x64:
case 0x65:
case 0x66:
case 0x67:
case 0x68:
case 0x69:
case 0x6a:
case 0x6b:
case 0x6c:
case 0x6d:
case 0x6e:
case 0x6f:
ip6_print(p, length);
break;
#endif
default:
return 0; /* did not find a ip header */
break;
}
return 1; /* we printed an v4/v6 packet */
}
static int
juniper_parse_header (const u_char *p, const struct pcap_pkthdr *h, struct juniper_l2info_t *l2info) {
struct juniper_cookie_table_t *lp = juniper_cookie_table;
u_int idx, offset;
#ifdef DLT_JUNIPER_ATM2
u_int32_t control_word;
#endif
l2info->header_len = 0;
l2info->cookie_len = 0;
l2info->proto = 0;
l2info->length = h->len;
l2info->caplen = h->caplen;
l2info->direction = p[3]&JUNIPER_BPF_PKT_IN;
TCHECK2(p[0],4);
if (EXTRACT_24BITS(p) != JUNIPER_MGC_NUMBER) { /* magic number found ? */
printf("no magic-number found!");
return 0;
}
if (eflag) /* print direction */
printf("%3s ",tok2str(juniper_direction_values,"---",l2info->direction));
/* extensions present ? - calculate how much bytes to skip */
if ((p[3] & JUNIPER_BPF_EXT ) == JUNIPER_BPF_EXT ) {
offset = 6 + EXTRACT_16BITS(p+4);
if (eflag>1)
printf("ext-len %u, ",EXTRACT_16BITS(p+4));
} else
offset = 4;
if ((p[3] & JUNIPER_BPF_NO_L2 ) == JUNIPER_BPF_NO_L2 ) {
if (eflag)
printf("no-L2-hdr, ");
/* there is no link-layer present -
* perform the v4/v6 heuristics
* to figure out what it is
*/
TCHECK2(p[offset+4],1);
if(ip_heuristic_guess(p+offset+4,l2info->length-(offset+4)) == 0)
printf("no IP-hdr found!");
l2info->header_len=offset+4;
return 0; /* stop parsing the output further */
}
l2info->header_len = offset;
p+=l2info->header_len;
l2info->length -= l2info->header_len;
l2info->caplen -= l2info->header_len;
/* search through the cookie table and copy values matching for our PIC type */
while (lp->s != NULL) {
if (lp->pictype == l2info->pictype) {
l2info->cookie_len += lp->cookie_len;
switch (p[0]) {
case LS_COOKIE_ID:
l2info->cookie_type = LS_COOKIE_ID;
l2info->cookie_len += 2;
break;
case AS_COOKIE_ID:
l2info->cookie_type = AS_COOKIE_ID;
l2info->cookie_len = 8;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
#ifdef DLT_JUNIPER_MFR
/* MFR child links don't carry cookies */
if (l2info->pictype == DLT_JUNIPER_MFR &&
(p[0] & MFR_BE_MASK) == MFR_BE_MASK) {
l2info->cookie_len = 0;
}
#endif
l2info->header_len += l2info->cookie_len;
l2info->length -= l2info->cookie_len;
l2info->caplen -= l2info->cookie_len;
if (eflag)
printf("%s-PIC, cookie-len %u",
lp->s,
l2info->cookie_len);
if (l2info->cookie_len > 0) {
TCHECK2(p[0],l2info->cookie_len);
if (eflag)
printf(", cookie 0x");
for (idx = 0; idx < l2info->cookie_len; idx++) {
l2info->cookie[idx] = p[idx]; /* copy cookie data */
if (eflag) printf("%02x",p[idx]);
}
}
if (eflag) printf(": "); /* print demarc b/w L2/L3*/
l2info->proto = EXTRACT_16BITS(p+l2info->cookie_len);
break;
}
++lp;
}
p+=l2info->cookie_len;
/* DLT_ specific parsing */
switch(l2info->pictype) {
#ifdef DLT_JUNIPER_MLPPP
case DLT_JUNIPER_MLPPP:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MLFR
case DLT_JUNIPER_MLFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
}
break;
#endif
#ifdef DLT_JUNIPER_MFR
case DLT_JUNIPER_MFR:
switch (l2info->cookie_type) {
case LS_COOKIE_ID:
l2info->bundle = l2info->cookie[1];
l2info->proto = EXTRACT_16BITS(p);
l2info->header_len += 2;
l2info->length -= 2;
l2info->caplen -= 2;
break;
case AS_COOKIE_ID:
l2info->bundle = (EXTRACT_16BITS(&l2info->cookie[6])>>3)&0xfff;
l2info->proto = (l2info->cookie[5])&JUNIPER_LSQ_L3_PROTO_MASK;
break;
default:
l2info->bundle = l2info->cookie[0];
break;
}
break;
#endif
#ifdef DLT_JUNIPER_ATM2
case DLT_JUNIPER_ATM2:
TCHECK2(p[0],4);
/* ATM cell relay control word present ? */
if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK) {
control_word = EXTRACT_32BITS(p);
/* some control word heuristics */
switch(control_word) {
case 0: /* zero control word */
case 0x08000000: /* < JUNOS 7.4 control-word */
case 0x08380000: /* cntl word plus cell length (56) >= JUNOS 7.4*/
l2info->header_len += 4;
break;
default:
break;
}
if (eflag)
printf("control-word 0x%08x ", control_word);
}
break;
#endif
#ifdef DLT_JUNIPER_ATM1
case DLT_JUNIPER_ATM1:
break;
#endif
#ifdef DLT_JUNIPER_PPP
case DLT_JUNIPER_PPP:
break;
#endif
#ifdef DLT_JUNIPER_CHDLC
case DLT_JUNIPER_CHDLC:
break;
#endif
#ifdef DLT_JUNIPER_ETHER
case DLT_JUNIPER_ETHER:
break;
#endif
#ifdef DLT_JUNIPER_FRELAY
case DLT_JUNIPER_FRELAY:
break;
#endif
default:
printf("Unknown Juniper DLT_ type %u: ", l2info->pictype);
break;
}
if (eflag > 1)
printf("hlen %u, proto 0x%04x, ",l2info->header_len,l2info->proto);
return 1; /* everything went ok so far. continue parsing */
trunc:
printf("[|juniper_hdr], length %u",h->len);
return 0;
}
/*
* Local Variables:
* c-style: whitesmith
* c-basic-offset: 4
* End:
*/
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