848 lines
25 KiB
C
848 lines
25 KiB
C
/*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code
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* distributions retain the above copyright notice and this paragraph
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* in its entirety, and (2) distributions including binary code include
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* the above copyright notice and this paragraph in its entirety in
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* the documentation or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
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* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
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* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE.
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*
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* Original code by Hannes Gredler (hannes@juniper.net)
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/tcpdump/print-juniper.c,v 1.8.2.13 2005/06/20 07:45:05 hannes Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <pcap.h>
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#include <stdio.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "ppp.h"
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#include "llc.h"
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#include "nlpid.h"
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#include "ethertype.h"
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#include "atm.h"
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#define JUNIPER_BPF_OUT 0 /* Outgoing packet */
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#define JUNIPER_BPF_IN 1 /* Incoming packet */
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#define JUNIPER_BPF_PKT_IN 0x1 /* Incoming packet */
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#define JUNIPER_BPF_NO_L2 0x2 /* L2 header stripped */
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#define JUNIPER_MGC_NUMBER 0x4d4743 /* = "MGC" */
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#define JUNIPER_LSQ_L3_PROTO_SHIFT 4
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#define JUNIPER_LSQ_L3_PROTO_MASK (0x17 << JUNIPER_LSQ_L3_PROTO_SHIFT)
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#define JUNIPER_LSQ_L3_PROTO_IPV4 (0 << JUNIPER_LSQ_L3_PROTO_SHIFT)
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#define JUNIPER_LSQ_L3_PROTO_IPV6 (1 << JUNIPER_LSQ_L3_PROTO_SHIFT)
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#define JUNIPER_LSQ_L3_PROTO_MPLS (2 << JUNIPER_LSQ_L3_PROTO_SHIFT)
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#define JUNIPER_LSQ_L3_PROTO_ISO (3 << JUNIPER_LSQ_L3_PROTO_SHIFT)
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#define JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE 1
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#define JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE 2
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#define JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE 3
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#define JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE 4
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#define JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE 5
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static struct tok juniper_ipsec_type_values[] = {
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{ JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE, "ESP ENCR-AUTH" },
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{ JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE, "ESP ENCR-AH AUTH" },
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{ JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE, "ESP AUTH" },
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{ JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE, "AH AUTH" },
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{ JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE, "ESP ENCR" },
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{ 0, NULL}
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};
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static struct tok juniper_direction_values[] = {
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{ JUNIPER_BPF_IN, "In"},
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{ JUNIPER_BPF_OUT, "Out"},
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{ 0, NULL}
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};
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struct juniper_cookie_table_t {
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u_int32_t pictype; /* pic type */
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u_int8_t cookie_len; /* cookie len */
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const char *s; /* pic name */
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};
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static struct juniper_cookie_table_t juniper_cookie_table[] = {
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#ifdef DLT_JUNIPER_ATM1
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{ DLT_JUNIPER_ATM1, 4, "ATM1"},
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#endif
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#ifdef DLT_JUNIPER_ATM2
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{ DLT_JUNIPER_ATM2, 8, "ATM2"},
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#endif
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#ifdef DLT_JUNIPER_MLPPP
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{ DLT_JUNIPER_MLPPP, 2, "MLPPP"},
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#endif
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#ifdef DLT_JUNIPER_MLFR
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{ DLT_JUNIPER_MLFR, 2, "MLFR"},
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#endif
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#ifdef DLT_JUNIPER_MFR
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{ DLT_JUNIPER_MFR, 4, "MFR"},
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#endif
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#ifdef DLT_JUNIPER_PPPOE
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{ DLT_JUNIPER_PPPOE, 0, "PPPoE"},
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#endif
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#ifdef DLT_JUNIPER_PPPOE_ATM
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{ DLT_JUNIPER_PPPOE_ATM, 0, "PPPoE ATM"},
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#endif
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#ifdef DLT_JUNIPER_GGSN
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{ DLT_JUNIPER_GGSN, 8, "GGSN"},
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#endif
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#ifdef DLT_JUNIPER_MONITOR
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{ DLT_JUNIPER_MONITOR, 8, "MONITOR"},
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#endif
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#ifdef DLT_JUNIPER_SERVICES
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{ DLT_JUNIPER_SERVICES, 8, "AS"},
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#endif
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#ifdef DLT_JUNIPER_ES
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{ DLT_JUNIPER_ES, 0, "ES"},
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#endif
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{ 0, 0, NULL }
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};
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struct juniper_l2info_t {
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u_int32_t length;
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u_int32_t caplen;
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u_int32_t pictype;
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u_int8_t direction;
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u_int8_t header_len;
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u_int8_t cookie_len;
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u_int8_t cookie_type;
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u_int8_t cookie[8];
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u_int8_t bundle;
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u_int16_t proto;
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};
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#define LS_COOKIE_ID 0x54
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#define AS_COOKIE_ID 0x47
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#define LS_MLFR_COOKIE_LEN 4
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#define ML_MLFR_COOKIE_LEN 2
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#define LS_MFR_COOKIE_LEN 6
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#define ATM1_COOKIE_LEN 4
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#define ATM2_COOKIE_LEN 8
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#define ATM2_PKT_TYPE_MASK 0x70
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#define ATM2_GAP_COUNT_MASK 0x3F
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#define JUNIPER_PROTO_NULL 1
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#define JUNIPER_PROTO_IPV4 2
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#define JUNIPER_PROTO_IPV6 6
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static struct tok juniper_protocol_values[] = {
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{ JUNIPER_PROTO_NULL, "Null" },
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{ JUNIPER_PROTO_IPV4, "IPv4" },
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{ JUNIPER_PROTO_IPV6, "IPv6" },
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{ 0, NULL}
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};
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int ip_heuristic_guess(register const u_char *, u_int);
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int juniper_ppp_heuristic_guess(register const u_char *, u_int);
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static int juniper_parse_header (const u_char *, const struct pcap_pkthdr *, struct juniper_l2info_t *);
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#ifdef DLT_JUNIPER_GGSN
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u_int
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juniper_ggsn_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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struct juniper_ggsn_header {
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u_int8_t svc_id;
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u_int8_t flags_len;
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u_int8_t proto;
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u_int8_t flags;
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u_int8_t vlan_id[2];
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u_int8_t res[2];
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};
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const struct juniper_ggsn_header *gh;
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l2info.pictype = DLT_JUNIPER_GGSN;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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gh = (struct juniper_ggsn_header *)p;
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if (eflag)
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printf("proto %s (%u), vlan %u: ",
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tok2str(juniper_protocol_values,"Unknown",gh->proto),
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gh->proto,
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EXTRACT_16BITS(&gh->vlan_id[0]));
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switch (gh->proto) {
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case JUNIPER_PROTO_IPV4:
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ip_print(gndo, p, l2info.length);
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break;
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#ifdef INET6
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case JUNIPER_PROTO_IPV6:
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ip6_print(p, l2info.length);
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break;
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#endif /* INET6 */
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default:
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if (!eflag)
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printf("unknown GGSN proto (%u)", gh->proto);
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}
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_ES
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u_int
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juniper_es_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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struct juniper_ipsec_header {
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u_int8_t sa_index[2];
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u_int8_t ttl;
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u_int8_t type;
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u_int8_t spi[4];
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u_int8_t src_ip[4];
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u_int8_t dst_ip[4];
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};
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u_int rewrite_len,es_type_bundle;
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const struct juniper_ipsec_header *ih;
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l2info.pictype = DLT_JUNIPER_ES;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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ih = (struct juniper_ipsec_header *)p;
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switch (ih->type) {
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case JUNIPER_IPSEC_O_ESP_ENCRYPT_ESP_AUTHEN_TYPE:
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case JUNIPER_IPSEC_O_ESP_ENCRYPT_AH_AUTHEN_TYPE:
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rewrite_len = 0;
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es_type_bundle = 1;
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break;
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case JUNIPER_IPSEC_O_ESP_AUTHENTICATION_TYPE:
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case JUNIPER_IPSEC_O_AH_AUTHENTICATION_TYPE:
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case JUNIPER_IPSEC_O_ESP_ENCRYPTION_TYPE:
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rewrite_len = 16;
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es_type_bundle = 0;
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default:
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printf("ES Invalid type %u, length %u",
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ih->type,
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l2info.length);
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return l2info.header_len;
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}
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l2info.length-=rewrite_len;
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p+=rewrite_len;
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if (eflag) {
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if (!es_type_bundle) {
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printf("ES SA, index %u, ttl %u type %s (%u), spi %u, Tunnel %s > %s, length %u\n",
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EXTRACT_16BITS(&ih->sa_index),
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ih->ttl,
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tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
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ih->type,
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EXTRACT_32BITS(&ih->spi),
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ipaddr_string(EXTRACT_32BITS(&ih->src_ip)),
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ipaddr_string(EXTRACT_32BITS(&ih->dst_ip)),
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l2info.length);
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} else {
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printf("ES SA, index %u, ttl %u type %s (%u), length %u\n",
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EXTRACT_16BITS(&ih->sa_index),
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ih->ttl,
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tok2str(juniper_ipsec_type_values,"Unknown",ih->type),
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ih->type,
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l2info.length);
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}
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}
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ip_print(gndo, p, l2info.length);
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_MONITOR
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u_int
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juniper_monitor_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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struct juniper_monitor_header {
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u_int8_t pkt_type;
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u_int8_t padding;
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u_int8_t iif[2];
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u_int8_t service_id[4];
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};
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const struct juniper_monitor_header *mh;
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l2info.pictype = DLT_JUNIPER_MONITOR;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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mh = (struct juniper_monitor_header *)p;
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if (eflag)
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printf("service-id %u, iif %u, pkt-type %u: ",
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EXTRACT_32BITS(&mh->service_id),
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EXTRACT_16BITS(&mh->iif),
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mh->pkt_type);
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/* no proto field - lets guess by first byte of IP header*/
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ip_heuristic_guess(p, l2info.length);
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_SERVICES
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u_int
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juniper_services_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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struct juniper_services_header {
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u_int8_t svc_id;
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u_int8_t flags_len;
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u_int8_t svc_set_id[2];
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u_int8_t dir_iif[4];
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};
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const struct juniper_services_header *sh;
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l2info.pictype = DLT_JUNIPER_SERVICES;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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sh = (struct juniper_services_header *)p;
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if (eflag)
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printf("service-id %u flags 0x%02x service-set-id 0x%04x iif %u: ",
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sh->svc_id,
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sh->flags_len,
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EXTRACT_16BITS(&sh->svc_set_id),
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EXTRACT_24BITS(&sh->dir_iif[1]));
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/* no proto field - lets guess by first byte of IP header*/
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ip_heuristic_guess(p, l2info.length);
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_PPPOE
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u_int
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juniper_pppoe_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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l2info.pictype = DLT_JUNIPER_PPPOE;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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/* this DLT contains nothing but raw ethernet frames */
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ether_print(p, l2info.length, l2info.caplen);
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_PPPOE_ATM
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u_int
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juniper_pppoe_atm_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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u_int16_t extracted_ethertype;
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l2info.pictype = DLT_JUNIPER_PPPOE_ATM;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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extracted_ethertype = EXTRACT_16BITS(p);
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/* this DLT contains nothing but raw PPPoE frames,
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* prepended with a type field*/
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if (ether_encap_print(extracted_ethertype,
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p+ETHERTYPE_LEN,
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l2info.length-ETHERTYPE_LEN,
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l2info.caplen-ETHERTYPE_LEN,
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&extracted_ethertype) == 0)
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/* ether_type not known, probably it wasn't one */
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printf("unknown ethertype 0x%04x", extracted_ethertype);
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_MLPPP
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u_int
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juniper_mlppp_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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l2info.pictype = DLT_JUNIPER_MLPPP;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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/* suppress Bundle-ID if frame was captured on a child-link
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* best indicator if the cookie looks like a proto */
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if (eflag &&
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EXTRACT_16BITS(&l2info.cookie) != PPP_OSI &&
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EXTRACT_16BITS(&l2info.cookie) != (PPP_ADDRESS << 8 | PPP_CONTROL))
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printf("Bundle-ID %u: ",l2info.bundle);
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p+=l2info.header_len;
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/* first try the LSQ protos */
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switch(l2info.proto) {
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case JUNIPER_LSQ_L3_PROTO_IPV4:
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ip_print(gndo, p, l2info.length);
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return l2info.header_len;
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#ifdef INET6
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case JUNIPER_LSQ_L3_PROTO_IPV6:
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ip6_print(p,l2info.length);
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return l2info.header_len;
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#endif
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case JUNIPER_LSQ_L3_PROTO_MPLS:
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mpls_print(p,l2info.length);
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return l2info.header_len;
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case JUNIPER_LSQ_L3_PROTO_ISO:
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isoclns_print(p,l2info.length,l2info.caplen);
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return l2info.header_len;
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default:
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break;
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}
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/* zero length cookie ? */
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switch (EXTRACT_16BITS(&l2info.cookie)) {
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case PPP_OSI:
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ppp_print(p-2,l2info.length+2);
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break;
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case (PPP_ADDRESS << 8 | PPP_CONTROL): /* fall through */
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default:
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ppp_print(p,l2info.length);
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break;
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}
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return l2info.header_len;
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}
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#endif
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#ifdef DLT_JUNIPER_MFR
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u_int
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juniper_mfr_print(const struct pcap_pkthdr *h, register const u_char *p)
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{
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struct juniper_l2info_t l2info;
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l2info.pictype = DLT_JUNIPER_MFR;
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if(juniper_parse_header(p, h, &l2info) == 0)
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return l2info.header_len;
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p+=l2info.header_len;
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/* suppress Bundle-ID if frame was captured on a child-link */
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if (eflag && EXTRACT_32BITS(l2info.cookie) != 1) printf("Bundle-ID %u, ",l2info.bundle);
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switch (l2info.proto) {
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case (LLCSAP_ISONS<<8 | LLCSAP_ISONS):
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isoclns_print(p+1, l2info.length-1, l2info.caplen-1);
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break;
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case (LLC_UI<<8 | NLPID_Q933):
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case (LLC_UI<<8 | NLPID_IP):
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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;
|
|
u_int32_t control_word;
|
|
|
|
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 ? */
|
|
control_word = EXTRACT_32BITS(p);
|
|
if(control_word == 0 || control_word == 0x08000000) {
|
|
l2info.header_len += 4;
|
|
l2info.length -= 4;
|
|
p += 4;
|
|
}
|
|
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;
|
|
|
|
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 ? */
|
|
return 0;
|
|
else
|
|
l2info->header_len = 4;
|
|
|
|
if (eflag) /* print direction */
|
|
printf("%3s ",tok2str(juniper_direction_values,"---",l2info->direction));
|
|
|
|
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[8],1);
|
|
if(ip_heuristic_guess(p+8,l2info->length-8) == 0)
|
|
printf("no IP-hdr found!");
|
|
|
|
l2info->header_len+=4;
|
|
return 0; /* stop parsing the output further */
|
|
|
|
}
|
|
|
|
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;
|
|
l2info->header_len += lp->cookie_len;
|
|
|
|
switch (p[0]) {
|
|
case LS_COOKIE_ID:
|
|
l2info->cookie_type = LS_COOKIE_ID;
|
|
l2info->cookie_len += 2;
|
|
l2info->header_len += 2;
|
|
break;
|
|
case AS_COOKIE_ID:
|
|
l2info->cookie_type = AS_COOKIE_ID;
|
|
l2info->cookie_len += 6;
|
|
l2info->header_len += 6;
|
|
break;
|
|
|
|
default:
|
|
l2info->bundle = l2info->cookie[0];
|
|
break;
|
|
}
|
|
|
|
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) {
|
|
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;
|
|
case DLT_JUNIPER_MLFR: /* fall through */
|
|
case DLT_JUNIPER_MFR:
|
|
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;
|
|
break;
|
|
default:
|
|
l2info->bundle = l2info->cookie[0];
|
|
break;
|
|
}
|
|
l2info->proto = EXTRACT_16BITS(p);
|
|
l2info->header_len += 2;
|
|
l2info->length -= 2;
|
|
l2info->caplen -= 2;
|
|
break;
|
|
case DLT_JUNIPER_ATM2:
|
|
TCHECK2(p[0],4);
|
|
/* ATM cell relay control word present ? */
|
|
if (l2info->cookie[7] & ATM2_PKT_TYPE_MASK && *p & 0x08) {
|
|
l2info->header_len += 4;
|
|
if (eflag)
|
|
printf("control-word 0x%08x ",EXTRACT_32BITS(p));
|
|
}
|
|
break;
|
|
case DLT_JUNIPER_ATM1:
|
|
default:
|
|
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:
|
|
*/
|