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-rw-r--r--print-juniper.c1032
1 files changed, 1032 insertions, 0 deletions
diff --git a/print-juniper.c b/print-juniper.c
new file mode 100644
index 000000000000..b5837e378573
--- /dev/null
+++ b/print-juniper.c
@@ -0,0 +1,1032 @@
+/*
+ * 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)
+ */
+
+#ifndef lint
+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)";
+#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(EXTRACT_32BITS(&ih->src_ip)),
+ ipaddr_string(EXTRACT_32BITS(&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:
+ */
generated by cgit v1.2.3 (git 2.25.1) at 2022-07-05 16:08:23 +0000