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-rw-r--r--contrib/tcpdump/print-isoclns.c1384
1 files changed, 1146 insertions, 238 deletions
diff --git a/contrib/tcpdump/print-isoclns.c b/contrib/tcpdump/print-isoclns.c
index aaf360a..636de33 100644
--- a/contrib/tcpdump/print-isoclns.c
+++ b/contrib/tcpdump/print-isoclns.c
@@ -19,11 +19,14 @@
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Original code by Matt Thomas, Digital Equipment Corporation
+ *
+ * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
+ * complete IS-IS support.
*/
#ifndef lint
static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.22 2000/10/11 04:04:33 guy Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.36 2002/01/10 09:33:23 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
@@ -37,6 +40,7 @@ static const char rcsid[] =
#include <netinet/in.h>
#include <stdio.h>
+#include <string.h>
#include "interface.h"
#include "addrtoname.h"
@@ -47,9 +51,10 @@ static const char rcsid[] =
#define NLPID_CLNS 129 /* 0x81 */
#define NLPID_ESIS 130 /* 0x82 */
#define NLPID_ISIS 131 /* 0x83 */
+#define NLPID_IP6 0x8e
+#define NLPID_IP 0xcc
#define NLPID_NULLNS 0
-
/*
* IS-IS is defined in ISO 10589. Look there for protocol definitions.
*/
@@ -62,10 +67,13 @@ static const char rcsid[] =
#define L1_LAN_IIH 15
#define L2_LAN_IIH 16
#define PTP_IIH 17
-#define L1_LS_PDU 18
-#define L2_LS_PDU 19
-#define L1_COMPLETE_SEQ_PDU 24
-#define L2_COMPLETE_SEQ_PDU 25
+#define L1_LSP 18
+#define L2_LSP 20
+#define L1_CSNP 24
+#define L2_CSNP 25
+#define L1_PSNP 26
+#define L2_PSNP 27
+
/*
* A TLV is a tuple of a type, length and a value and is normally used for
@@ -73,21 +81,89 @@ static const char rcsid[] =
* the well known types.
*/
-#define TLV_AREA_ADDR 1
-#define TLV_IS_REACH 2
-#define TLV_ES_REACH 3
-#define TLV_SUMMARY 5
-#define TLV_ISNEIGH 6
-#define TLV_PADDING 8
-#define TLV_LSP 9
-#define TLV_AUTHENT 10
-#define TLV_IP_REACH 128
-#define TLV_PROTOCOLS 129
-#define TLV_IP_EXTERN 130
-#define TLV_IDRP_INFO 131
-#define TLV_IPADDR 132
-#define TLV_IPAUTH 133
-#define TLV_PTP_ADJ 240
+#define TLV_AREA_ADDR 1
+#define TLV_IS_REACH 2
+#define TLV_ES_REACH 3
+#define TLV_SUMMARY 5
+#define TLV_ISNEIGH 6
+#define TLV_PADDING 8
+#define TLV_LSP 9
+#define TLV_AUTH 10
+#define TLV_CHECKSUM 12
+#define TLV_EXT_IS_REACH 22
+#define TLV_IP_REACH 128
+#define TLV_PROTOCOLS 129
+#define TLV_IP_REACH_EXT 130
+#define TLV_IDRP_INFO 131
+#define TLV_IPADDR 132
+#define TLV_IPAUTH 133
+#define TLV_TE_ROUTER_ID 134
+#define TLV_EXT_IP_REACH 135
+#define TLV_HOSTNAME 137
+#define TLV_RESTART_SIGNALING 211
+#define TLV_MT_IS_REACH 222
+#define TLV_MT_SUPPORTED 229
+#define TLV_IP6ADDR 232
+#define TLV_MT_REACH 235
+#define TLV_IP6_REACH 236
+#define TLV_PTP_ADJ 240
+
+#define SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3
+#define SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6
+#define SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8
+#define SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9
+#define SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10
+#define SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11
+#define SUBTLV_EXT_IS_REACH_TE_METRIC 18
+
+#define SUBTLV_AUTH_SIMPLE 1
+#define SUBTLV_AUTH_MD5 54
+
+#define ISIS_MASK_LEVEL_BITS(x) ((x)&0x1)
+
+#define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4)
+#define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3)
+#define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80)
+#define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78)
+#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40)
+#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20)
+#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10)
+#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8)
+
+#define ISIS_MASK_TLV_EXT_IP_UPDOWN(x) ((x)&0x80)
+#define ISIS_MASK_TLV_EXT_IP_SUBTLV(x) ((x)&0x40)
+
+#define ISIS_MASK_TLV_IP6_UPDOWN(x) ((x)&0x80)
+#define ISIS_MASK_TLV_IP6_IE(x) ((x)&0x40)
+#define ISIS_MASK_TLV_IP6_SUBTLV(x) ((x)&0x20)
+
+#define ISIS_MASK_RESTART_RR(x) ((x)&0x1)
+#define ISIS_MASK_RESTART_RA(x) ((x)&0x2)
+
+#define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80)
+#define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40)
+#define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80)
+#define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f)
+
+#define ISIS_LSP_TYPE_UNUSED0 0
+#define ISIS_LSP_TYPE_LEVEL_1 1
+#define ISIS_LSP_TYPE_UNUSED2 2
+#define ISIS_LSP_TYPE_LEVEL_2 3
+
+static struct tok isis_lsp_istype_values[] = {
+ { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
+ { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"},
+ { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
+ { ISIS_LSP_TYPE_LEVEL_2, "L1L2 IS"},
+ { 0, NULL }
+};
+
+static struct tok isis_nlpid_values[] = {
+ { NLPID_CLNS, "CLNS"},
+ { NLPID_IP, "IPv4"},
+ { NLPID_IP6, "IPv6"},
+ { 0, "unknown" }
+};
/*
* Katz's point to point adjacency TLV uses codes to tell us the state of
@@ -98,89 +174,117 @@ static const char rcsid[] =
#define ISIS_PTP_ADJ_INIT 1
#define ISIS_PTP_ADJ_DOWN 2
-static int osi_cksum(const u_char *, int, u_char *);
+static int osi_cksum(const u_char *, u_int, u_char *);
static void esis_print(const u_char *, u_int);
static int isis_print(const u_char *, u_int);
-struct isis_ptp_adjancey_values {
- u_char id;
- char *name;
+static struct tok isis_ptp_adjancey_values[] = {
+ { ISIS_PTP_ADJ_UP, "Up" },
+ { ISIS_PTP_ADJ_INIT, "Initializing" },
+ { ISIS_PTP_ADJ_DOWN, "Down" }
};
-static struct isis_ptp_adjancey_values isis_ptp_adjancey_values[] = {
- { ISIS_PTP_ADJ_UP, "UP" },
- { ISIS_PTP_ADJ_INIT, "INIT" },
- { ISIS_PTP_ADJ_DOWN, "DOWN" }
+struct isis_tlv_ptp_adj {
+ u_char adjacency_state;
+ u_char ext_local_circuit_id[4];
+ u_char neighbor_sysid[SYSTEM_ID_LEN];
+ u_char neighbor_ext_local_circuit_id[4];
};
+struct isis_tlv_ip_reach {
+ u_char metric_default;
+ u_char metric_delay;
+ u_char metric_expense;
+ u_char metric_error;
+ u_char prefix[4];
+ u_char mask[4];
+};
+
+struct isis_tlv_is_reach {
+ u_char metric_default;
+ u_char metric_delay;
+ u_char metric_expense;
+ u_char metric_error;
+ u_char neighbor_nodeid[SYSTEM_ID_LEN+1];
+};
+
+
struct isis_common_header {
u_char nlpid;
u_char fixed_len;
u_char version; /* Protocol version? */
u_char id_length;
- u_char enc_pdu_type; /* 3 MSbs are reserved */
+ u_char pdu_type; /* 3 MSbs are reserved */
u_char pkt_version; /* Packet format version? */
u_char reserved;
- u_char enc_max_area;
+ u_char max_area;
};
-struct isis_header {
- u_char nlpid;
- u_char fixed_len;
- u_char version; /* Protocol version? */
- u_char id_length;
- u_char enc_pdu_type; /* 3 MSbs are reserved */
- u_char pkt_version; /* Packet format version? */
- u_char reserved;
- u_char enc_max_area;
- u_char circuit;
- u_char enc_source_id[SYSTEM_ID_LEN];
- u_char enc_holding_time[2];
- u_char enc_packet_len[2];
- u_char enc_priority;
- u_char enc_lan_id[SYSTEM_ID_LEN+1];
+struct isis_iih_lan_header {
+ u_char circuit_type;
+ u_char source_id[SYSTEM_ID_LEN];
+ u_char holding_time[2];
+ u_char pdu_len[2];
+ u_char priority;
+ u_char lan_id[SYSTEM_ID_LEN+1];
};
-struct isis_lan_header {
- u_char circuit;
- u_char enc_source_id[SYSTEM_ID_LEN];
- u_char enc_holding_time[2];
- u_char enc_packet_len[2];
- u_char enc_priority;
- u_char enc_lan_id[SYSTEM_ID_LEN+1];
+
+struct isis_iih_ptp_header {
+ u_char circuit_type;
+ u_char source_id[SYSTEM_ID_LEN];
+ u_char holding_time[2];
+ u_char pdu_len[2];
+ u_char circuit_id;
};
-struct isis_ptp_header {
- u_char circuit;
- u_char enc_source_id[SYSTEM_ID_LEN];
- u_char enc_holding_time[2];
- u_char enc_packet_len[2];
- u_char loc_circuit_id;
+struct isis_lsp_header {
+ u_char pdu_len[2];
+ u_char remaining_lifetime[2];
+ u_char lsp_id[SYSTEM_ID_LEN+2];
+ u_char sequence_number[4];
+ u_char checksum[2];
+ u_char typeblock;
};
-#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
-#define ISIS_HEADER_SIZE (15+(SYSTEM_ID_LEN<<1))
-#define ISIS_PTP_HEADER_SIZE (14+SYSTEM_ID_LEN)
-#define L1_LS_PDU_HEADER_SIZE (21+SYSTEM_ID_LEN)
-#define L2_LS_PDU_HEADER_SIZE L1_LS_PDU_HEADER_SIZE
-#define L1_COMPLETE_SEQ_PDU_HEADER_SIZE 33
-#define L2_COMPLETE_SEQ_PDU_HEADER_SIZE L1_COMPLETE_SEQ_PDU_HEADER_SIZE
+struct isis_csnp_header {
+ u_char pdu_len[2];
+ u_char source_id[SYSTEM_ID_LEN+1];
+ u_char start_lsp_id[SYSTEM_ID_LEN+2];
+ u_char end_lsp_id[SYSTEM_ID_LEN+2];
+};
+struct isis_psnp_header {
+ u_char pdu_len[2];
+ u_char source_id[SYSTEM_ID_LEN+1];
+};
+struct isis_tlv_lsp {
+ u_char remaining_lifetime[2];
+ u_char lsp_id[SYSTEM_ID_LEN+2];
+ u_char sequence_number[4];
+ u_char checksum[2];
+};
+
+#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
+#define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header))
+#define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header))
+#define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header))
+#define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
+#define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
-void
-isoclns_print(const u_char *p, u_int length, u_int caplen,
+void isoclns_print(const u_char *p, u_int length, u_int caplen,
const u_char *esrc, const u_char *edst)
{
u_char pdu_type;
- struct isis_header *header;
+ const struct isis_common_header *header;
- header = (struct isis_header *)p;
- pdu_type = header->enc_pdu_type & PDU_TYPE_MASK;
+ header = (const struct isis_common_header *)p;
+ pdu_type = header->pdu_type & PDU_TYPE_MASK;
if (caplen < 1) {
printf("[|iso-clns] ");
- if (!eflag)
+ if (!eflag && esrc != NULL && edst != NULL)
printf("%s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
@@ -190,50 +294,46 @@ isoclns_print(const u_char *p, u_int length, u_int caplen,
switch (*p) {
case NLPID_CLNS:
- printf("iso clns");
- if (!eflag)
- (void)printf(" %s > %s",
+ (void)printf("CLNS(%d)", length);
+ if (!eflag && esrc != NULL && edst != NULL)
+ (void)printf(", %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
break;
case NLPID_ESIS:
- printf("iso esis");
- if (!eflag)
- (void)printf(" %s > %s",
+ (void)printf("ESIS");
+ if (!eflag && esrc != NULL && edst != NULL)
+ (void)printf(", %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
esis_print(p, length);
return;
case NLPID_ISIS:
- printf("iso isis");
- if (!eflag) {
- if(pdu_type != PTP_IIH)
- (void)printf(" %s > %s",
- etheraddr_string(esrc),
- etheraddr_string(edst));
- }
- (void)printf(" len=%d ", length);
+ (void)printf("ISIS(%d)", length);
+ if (!eflag && esrc != NULL && edst != NULL)
+ (void)printf(", %s > %s",
+ etheraddr_string(esrc),
+ etheraddr_string(edst));
if (!isis_print(p, length))
- default_print_unaligned(p, caplen);
+ default_print_unaligned(p, caplen);
break;
case NLPID_NULLNS:
- printf("iso nullns");
- if (!eflag)
- (void)printf(" %s > %s",
+ (void)printf("ISO NULLNS(%d)", length);
+ if (!eflag && esrc != NULL && edst != NULL)
+ (void)printf(", %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
break;
default:
- printf("iso clns %02x", p[0]);
- if (!eflag)
- (void)printf(" %s > %s",
+ (void)printf("CLNS %02x(%d)", p[0], length);
+ if (!eflag && esrc != NULL && edst != NULL)
+ (void)printf(", %s > %s",
etheraddr_string(esrc),
etheraddr_string(edst));
- (void)printf(" len=%d ", length);
if (caplen > 1)
default_print_unaligned(p, caplen);
break;
@@ -256,17 +356,19 @@ static void
esis_print(const u_char *p, u_int length)
{
const u_char *ep;
- int li = p[1];
- const struct esis_hdr *eh = (const struct esis_hdr *) &p[2];
+ u_int li;
+ const struct esis_hdr *eh;
u_char off[2];
- if (length == 2) {
+ if (length <= 2) {
if (qflag)
printf(" bad pkt!");
else
printf(" no header at all!");
return;
}
+ li = p[1];
+ eh = (const struct esis_hdr *) &p[2];
ep = p + li;
if (li > length) {
if (qflag)
@@ -372,7 +474,7 @@ esis_print(const u_char *p, u_int length)
}
if (vflag)
while (p < ep && li) {
- int op, opli;
+ u_int op, opli;
const u_char *q;
if (snapend - p < 2)
@@ -398,7 +500,7 @@ esis_print(const u_char *p, u_int length)
continue;
}
printf (" %d:<", op);
- while (--opli >= 0)
+ while (opli-- > 0)
printf("%02x", *q++);
printf (">");
}
@@ -408,181 +510,438 @@ esis_print(const u_char *p, u_int length)
* print_nsap
* Print out an NSAP.
*/
+static int
+print_nsap(register const u_char *cp, register int length)
+{
+ int i;
+
+ for (i = 0; i < length; i++) {
+ if (!TTEST2(*cp, 1))
+ return (0);
+ printf("%02x", *cp++);
+ if (((i & 1) == 0) && (i + 1 < length)) {
+ printf(".");
+ }
+ }
+ return (1);
+}
+
+static int
+isis_print_sysid(const u_char *cp)
+{
+ int i;
+
+ for (i = 1; i <= 6; i++) {
+ if (!TTEST2(*cp, 1))
+ return (0);
+ printf("%02x", *cp++);
+ if ((i==2)^(i==4)) {
+ printf(".");
+ }
+ }
+ return (1);
+}
+
+static int
+isis_print_nodeid(const u_char *cp)
+{
+ int i;
+
+ for (i = 1; i <= 7; i++) {
+ if (!TTEST2(*cp, 1))
+ return (0);
+ printf("%02x", *cp++);
+ if ((i & 1) == 0) {
+ printf(".");
+ }
+ }
+ return (1);
+}
static void
-print_nsap (register const u_char *cp, register int length)
+isis_print_lspid(const u_char *cp)
{
- int i;
-
- for (i = 0; i < length; i++) {
- printf("%02x", *cp++);
- if (((i & 1) == 0) && (i + 1 < length)) {
- printf(".");
+ int i;
+
+ for (i = 1; i <= 7; i++) {
+ printf("%02x", *cp++);
+ if ((i & 1) == 0)
+ printf(".");
}
+ printf("-%02x", *cp);
+}
- }
+static int
+isis_print_tlv_ip_reach (const u_char *cp, int length)
+{
+ int bitmasks[33] = {
+ 0x00000000,
+ 0x80000000, 0xc0000000, 0xe0000000, 0xf0000000,
+ 0xf8000000, 0xfc000000, 0xfe000000, 0xff000000,
+ 0xff800000, 0xffc00000, 0xffe00000, 0xfff00000,
+ 0xfff80000, 0xfffc0000, 0xfffe0000, 0xffff0000,
+ 0xffff8000, 0xffffc000, 0xffffe000, 0xfffff000,
+ 0xfffff800, 0xfffffc00, 0xfffffe00, 0xffffff00,
+ 0xffffff80, 0xffffffc0, 0xffffffe0, 0xfffffff0,
+ 0xfffffff8, 0xfffffffc, 0xfffffffe, 0xffffffff
+ };
+ int mask, prefix_len;
+ const struct isis_tlv_ip_reach *tlv_ip_reach;
+
+ tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp;
+
+ while (length > 0) {
+ if (length < sizeof(*tlv_ip_reach)) {
+ printf("short IP reachability (%d vs %lu)", length,
+ (unsigned long)sizeof(*tlv_ip_reach));
+ return (0);
+ }
+
+ if (!TTEST(*tlv_ip_reach))
+ return (0);
+
+ mask = EXTRACT_32BITS(tlv_ip_reach->mask);
+ prefix_len = 0;
+
+ while (prefix_len <= 33) {
+ if (bitmasks[prefix_len++] == mask) {
+ prefix_len--;
+ break;
+ }
+ }
+
+ /*
+ * 34 indicates no match -> must be a discontiguous netmask
+ * lets dump the mask, otherwise print the prefix_len
+ */
+ if (prefix_len == 34)
+ printf("\n\t\t\tIPv4 prefix: %u.%u.%u.%u mask %u.%u.%u.%u",
+ (tlv_ip_reach->prefix)[0],
+ (tlv_ip_reach->prefix)[1],
+ (tlv_ip_reach->prefix)[2],
+ (tlv_ip_reach->prefix)[3],
+ (tlv_ip_reach->mask)[0], (tlv_ip_reach->mask)[1],
+ (tlv_ip_reach->mask)[2], (tlv_ip_reach->mask)[3]);
+ else
+ printf("\n\t\t\tIPv4 prefix: %u.%u.%u.%u/%u",
+ (tlv_ip_reach->prefix)[0],
+ (tlv_ip_reach->prefix)[1],
+ (tlv_ip_reach->prefix)[2],
+ (tlv_ip_reach->prefix)[3], prefix_len);
+
+ printf("\n\t\t\t Default Metric: %02d, %s, Distribution: %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_default),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_default) ? "External" : "Internal",
+ ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->metric_default) ? "down" : "up");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->metric_delay))
+ printf("\n\t\t\t Delay Metric: %02d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_delay),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_delay) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->metric_expense))
+ printf("\n\t\t\t Expense Metric: %02d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_expense),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_expense) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->metric_error))
+ printf("\n\t\t\t Error Metric: %02d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->metric_error),
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->metric_error) ? "External" : "Internal");
+
+ length -= sizeof(struct isis_tlv_ip_reach);
+ tlv_ip_reach++;
+ }
+ return (1);
}
/*
* isis_print
* Decode IS-IS packets. Return 0 on error.
- *
- * So far, this is only smart enough to print IIH's. Someday...
*/
-static int
-isis_print (const u_char *p, u_int length)
+static int isis_print (const u_char *p, u_int length)
{
- struct isis_header *header;
- struct isis_ptp_header *header_ptp;
- u_char pdu_type, max_area, priority, type, len, tmp, alen;
- const u_char *pptr, *tptr;
- u_short packet_len, holding_time;
- int i;
-
- header = (struct isis_header *)p;
- header_ptp = (struct isis_ptp_header *)header;
- printf("\n\t\t\t");
-
+ const struct isis_common_header *header;
+
+ const struct isis_iih_lan_header *header_iih_lan;
+ const struct isis_iih_ptp_header *header_iih_ptp;
+ const struct isis_lsp_header *header_lsp;
+ const struct isis_csnp_header *header_csnp;
+ const struct isis_psnp_header *header_psnp;
+
+ const struct isis_tlv_lsp *tlv_lsp;
+ const struct isis_tlv_ptp_adj *tlv_ptp_adj;
+ const struct isis_tlv_is_reach *tlv_is_reach;
+
+ u_char pdu_type, max_area, type, len, tmp, alen, subl, subt, tslen, ttslen;
+ const u_char *optr, *pptr, *tptr;
+ u_short packet_len,pdu_len;
+ u_int i,j,bit_length,byte_length,metric;
+ u_char prefix[4]; /* copy buffer for ipv4 prefixes */
+#ifdef INET6
+ u_char prefix6[16]; /* copy buffer for ipv6 prefixes */
+#endif
+ u_char off[2];
+ float bw; /* copy buffer for several subTLVs of the extended IS reachability TLV */
+
+ packet_len=length;
+ optr = p; /* initialize the _o_riginal pointer - need it for parsing the checksum TLV */
+ header = (const struct isis_common_header *)p;
+ TCHECK(*header);
+ pptr = p+(ISIS_COMMON_HEADER_SIZE);
+ header_iih_lan = (const struct isis_iih_lan_header *)pptr;
+ header_iih_ptp = (const struct isis_iih_ptp_header *)pptr;
+ header_lsp = (const struct isis_lsp_header *)pptr;
+ header_csnp = (const struct isis_csnp_header *)pptr;
+ header_psnp = (const struct isis_psnp_header *)pptr;
+
/*
* Sanity checking of the header.
*/
if (header->nlpid != NLPID_ISIS) {
- printf(" coding error!");
- return(0);
+ printf(", coding error!");
+ return (0);
}
if (header->version != ISIS_VERSION) {
- printf(" version %d packet not supported", header->version);
- return(0);
+ printf(", version %d packet not supported", header->version);
+ return (0);
}
if ((header->id_length != SYSTEM_ID_LEN) && (header->id_length != 0)) {
- printf(" system ID length of %d is not supported",
+ printf(", system ID length of %d is not supported",
header->id_length);
- return(0);
- }
-
- if ((header->fixed_len != ISIS_HEADER_SIZE) &&
- (header->fixed_len != ISIS_PTP_HEADER_SIZE) &&
- (header->fixed_len != L1_LS_PDU_HEADER_SIZE) &&
- (header-> fixed_len != L1_COMPLETE_SEQ_PDU_HEADER_SIZE) ) {
- printf(" bogus fixed header length %u",
- header->fixed_len);
- return(0);
- }
-
- pdu_type = header->enc_pdu_type & PDU_TYPE_MASK;
- if ((pdu_type != L1_LAN_IIH) && (pdu_type != L2_LAN_IIH) &&
- (pdu_type != PTP_IIH) &&
- (pdu_type != L1_COMPLETE_SEQ_PDU) &&
- (pdu_type != L2_COMPLETE_SEQ_PDU) ) {
- printf(" PDU type (%d) not supported", pdu_type);
- return(0);
+ return (0);
}
if (header->pkt_version != ISIS_VERSION) {
- printf(" version %d packet not supported", header->pkt_version);
- return(0);
+ printf(", version %d packet not supported", header->pkt_version);
+ return (0);
}
- max_area = header->enc_max_area;
+ max_area = header->max_area;
switch(max_area) {
case 0:
max_area = 3; /* silly shit */
break;
case 255:
- printf(" bad packet -- 255 areas");
- return(0);
+ printf(", bad packet -- 255 areas");
+ return (0);
default:
break;
}
- switch (header->circuit) {
- case 0:
- printf(" PDU with circuit type 0");
- return(0);
- case 1:
- if (pdu_type == L2_LAN_IIH) {
- printf(" L2 IIH on an L1 only circuit");
- return(0);
+ printf(", hlen: %u, v: %u, sys-id-len: 6 (0), max-area: %u (%u)",
+ header->fixed_len,
+ header->pkt_version,
+ max_area,
+ header->max_area);
+
+ pdu_type=header->pdu_type;
+
+ switch (pdu_type) {
+
+ case L1_LAN_IIH:
+ case L2_LAN_IIH:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE);
+ return (0);
}
- break;
- case 2:
- if (pdu_type == L1_LAN_IIH) {
- printf(" L1 IIH on an L2 only circuit");
- return(0);
+
+ pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
}
- break;
- case 3:
- break;
- default:
- printf(" unknown circuit type");
- return(0);
- }
-
- holding_time = EXTRACT_16BITS(header->enc_holding_time);
-
- packet_len = EXTRACT_16BITS(header->enc_packet_len);
- if ((packet_len < ISIS_HEADER_SIZE) ||
- (packet_len > length)) {
- printf(" bogus packet length %d, real length %d", packet_len,
- length);
- return(0);
- }
- if(pdu_type != PTP_IIH)
- priority = header->enc_priority & PRIORITY_MASK;
+ printf(", L%s Lan IIH (%u)",
+ ISIS_MASK_LEVEL_BITS(pdu_type) ? "1" : "2",
+ pdu_len);
+
+ TCHECK(*header_iih_lan);
+ printf("\n\t\t source-id: ");
+ isis_print_sysid(header_iih_lan->source_id);
+ printf(", holding time: %us",EXTRACT_16BITS(header_iih_lan->holding_time));
+ switch(header_iih_lan->circuit_type) {
+
+ case 1:
+ printf(", Level 1 only");
+ break;
- /*
- * Now print the fixed header.
- */
- switch (pdu_type) {
- case L1_LAN_IIH:
- printf(" L1 lan iih, ");
- break;
- case L2_LAN_IIH:
- printf(" L2 lan iih, ");
+ case 2:
+ printf(", Level 2 only");
+ break;
+
+ case 3:
+ printf(", Level 1, Level 2");
+ break;
+
+ default:
+ printf(", unknown 0x%02x", header_iih_lan->circuit_type);
+ break;
+ }
+ printf("\n\t\t lan-id: ");
+ isis_print_nodeid(header_iih_lan->lan_id);
+ printf(", Priority: %u",(header_iih_lan->priority) & PRIORITY_MASK);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
break;
+
case PTP_IIH:
- printf(" PTP iih, ");
- break;
- }
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ printf(", PTP IIH (%u)",pdu_len);
+ TCHECK(*header_iih_ptp);
+ printf("\n\t\t source-id: ");
+ isis_print_sysid(header_iih_ptp->source_id);
+ printf(", holding time: %us",EXTRACT_16BITS(header_iih_ptp->holding_time));
+ printf(", circuit-id: 0x%02x", header_iih_ptp->circuit_id);
+ switch(header_iih_ptp->circuit_type) {
+
+ case 1:
+ printf(", Level 1 only");
+ break;
+
+ case 2:
+ printf(", Level 2 only");
+ break;
+
+ case 3:
+ printf(", Level 1, Level 2");
+ break;
- printf("circuit ");
- switch (header->circuit) {
- case 1:
- printf("l1 only, ");
+ default:
+ printf(", unknown 0x%02x", header_iih_ptp->circuit_type);
+ break;
+ }
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
break;
- case 2:
- printf("l2 only, ");
+
+ case L1_LSP:
+ case L2_LSP:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ if (pdu_type == L1_LSP)
+ printf(", L1 LSP (%u)",pdu_len);
+ else if (pdu_type == L2_LSP)
+ printf(", L2 LSP (%u)",pdu_len);
+
+ TCHECK(*header_lsp);
+ printf("\n\t\t lsp-id: ");
+ isis_print_lspid(header_lsp->lsp_id);
+ printf(", sequence number: 0x%08x",EXTRACT_32BITS(header_lsp->sequence_number));
+ printf(", lifetime: %5us",EXTRACT_16BITS(header_lsp->remaining_lifetime));
+ printf("\n\t\t checksum: 0x%04x",EXTRACT_16BITS(header_lsp->checksum));
+
+ printf(", %s", ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
+
+ if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
+ printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
+ printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
+ printf("ATT bit set, ");
+ }
+ printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
+ printf("%s", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
break;
- case 3:
- printf("l1-l2, ");
+
+ case L1_CSNP:
+ case L2_CSNP:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ printf(", bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ printf(", L%s CSNP (%u)", ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1", pdu_len);
+ TCHECK(*header_csnp);
+ printf("\n\t\t source-id: ");
+ isis_print_nodeid(header_csnp->source_id);
+ printf("\n\t\t start lsp-id: ");
+ isis_print_lspid(header_csnp->start_lsp_id);
+ printf("\n\t\t end lsp-id: ");
+ isis_print_lspid(header_csnp->end_lsp_id);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ break;
+
+ case L1_PSNP:
+ case L2_PSNP:
+ if (header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ printf("- bogus fixed header length %u should be %lu",
+ header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
+ if (packet_len>pdu_len) {
+ packet_len=pdu_len; /* do TLV decoding as long as it makes sense */
+ length=pdu_len;
+ }
+
+ printf(", L%s PSNP (%u)", ISIS_MASK_LEVEL_BITS(pdu_type) ? "2" : "1", pdu_len);
+ TCHECK(*header_psnp);
+ printf("\n\t\t source-id: ");
+ isis_print_nodeid(header_psnp->source_id);
+
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
break;
- }
- printf ("holding time %d ", holding_time);
- printf ("\n\t\t\t source %s, length %d",
- etheraddr_string(header->enc_source_id), packet_len);
- if((pdu_type==L1_LAN_IIH)||(pdu_type==L2_LAN_IIH))
- printf ("\n\t\t\t lan id %s(%d)", etheraddr_string(header->enc_lan_id),
- header->enc_lan_id[SYSTEM_ID_LEN]);
+ default:
+ printf(", PDU type (0x%02x) not supported", pdu_type);
+ return (1);
+ }
/*
* Now print the TLV's.
*/
- if(pdu_type==PTP_IIH) {
- packet_len -= ISIS_PTP_HEADER_SIZE;
- pptr = p + ISIS_PTP_HEADER_SIZE;
- } else {
- packet_len -= ISIS_HEADER_SIZE;
- pptr = p + ISIS_HEADER_SIZE;
- }
+
while (packet_len >= 2) {
- if (pptr >= snapend) {
- printf("\n\t\t\t packet exceeded snapshot");
- return(1);
+ if (pptr == snapend) {
+ return (1);
+ }
+
+ if (!TTEST2(*pptr, 2)) {
+ printf("\n\t\t\t packet exceeded snapshot (%ld) bytes",
+ (long)(pptr-snapend));
+ return (1);
}
type = *pptr++;
len = *pptr++;
@@ -590,53 +949,593 @@ isis_print (const u_char *p, u_int length)
if (len > packet_len) {
break;
}
+ printf("\n\t\t ");
switch (type) {
case TLV_AREA_ADDR:
- printf("\n\t\t\t area addresses");
+ printf("Area address(es) (%u)",len);
tmp = len;
tptr = pptr;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
alen = *tptr++;
while (tmp && alen < tmp) {
- printf("\n\t\t\t ");
- print_nsap(tptr, alen);
- printf(" (%d)", alen);
+ printf("\n\t\t\tArea address (%u): ",alen);
+ if (!print_nsap(tptr, alen))
+ return (1);
tptr += alen;
tmp -= alen + 1;
+ if (tmp==0) /* if this is the last area address do not attemt a boundary check */
+ break;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
alen = *tptr++;
}
break;
case TLV_ISNEIGH:
- printf("\n\t\t\t neighbor addresses");
+ printf("IS Neighbor(s) (%u)",len);
tmp = len;
tptr = pptr;
while (tmp >= ETHER_ADDR_LEN) {
- printf("\n\t\t\t %s", etheraddr_string(tptr));
+ printf("\n\t\t\tIS Neighbor: ");
+ if (!isis_print_sysid(tptr))
+ return (1);
tmp -= ETHER_ADDR_LEN;
tptr += ETHER_ADDR_LEN;
}
break;
+
case TLV_PADDING:
- printf("\n\t\t\t padding for %d bytes", len);
+ printf("Padding (%u)", len);
+ break;
+
+ case TLV_MT_IS_REACH:
+ printf("Multi Topology IS Reachability (%u)",len);
+ tptr=pptr;
+ tmp=len;
+ while (tmp>0) {
+ printf("\n\t\t\t");
+ if (!TTEST2(*tptr, 2))
+ goto trunctlv;
+ switch(EXTRACT_16BITS(tptr)&0x0fff) {
+
+ case 0:
+ printf("IPv4 unicast");
+ break;
+
+ case 1:
+ printf("In-Band Management");
+ break;
+
+ case 2:
+ printf("IPv6 unicast");
+ break;
+
+ case 3:
+ printf("Multicast");
+ break;
+
+ case 4095:
+ printf("Development, Experimental or Proprietary");
+ break;
+
+ default:
+ printf("Reserved for IETF Consensus");
+ break;
+ }
+ printf(" Topology (0x%03x)",EXTRACT_16BITS(tptr)&0x0fff);
+ tptr+=2;
+ printf("\n\t\t\t IS Neighbor: ");
+ if (!isis_print_nodeid(tptr))
+ return (1);
+ tptr+=(SYSTEM_ID_LEN+1);
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
+ printf(", Metric: %d",EXTRACT_24BITS(tptr));
+ tptr+=3;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ tslen=*(tptr++);
+ printf(", %ssub-TLVs present",tslen ? "" : "no ");
+
+ tptr+=tslen;
+ tmp-=(13+tslen);
+ }
+ break;
+
+ case TLV_EXT_IS_REACH:
+ printf("Extended IS Reachability (%u)",len);
+ tptr=pptr;
+ tmp=len;
+ while (tmp>0) {
+ printf("\n\t\t\tIS Neighbor: ");
+ if (!isis_print_nodeid(tptr))
+ return (1);
+ tptr+=(SYSTEM_ID_LEN+1);
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
+ printf(", Metric: %d",EXTRACT_24BITS(tptr));
+ tptr+=3;
+ if (!TTEST2(*tptr, 1))
+ goto trunctlv;
+ tslen=*(tptr++);
+ printf(", %ssub-TLVs present",tslen ? "" : "no ");
+ if (tslen) {
+ printf(" (%u)",tslen);
+ ttslen=tslen;
+ while (ttslen>0) {
+ if (!TTEST2(*tptr,2))
+ goto trunctlv;
+ printf("\n\t\t\t ");
+ subt=*(tptr++);
+ subl=*(tptr++);
+ switch(subt) {
+ case SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
+ printf("Administrative groups: 0x%08x", EXTRACT_32BITS(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("Maximum link bandwidth : %.3f Mbps",
+ bw*8/1000000 );
+ break;
+ case SUBTLV_EXT_IS_REACH_RESERVABLE_BW :
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("Reservable link bandwidth: %.3f Mbps",
+ bw*8/1000000 );
+ break;
+ case SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
+ printf("Unreserved bandwidth:");
+ for (i = 0; i < 8; i++) {
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ j = EXTRACT_32BITS(tptr);
+ memcpy (&bw, &j, 4);
+ printf("\n\t\t\t priority level %d: %.3f Mbps",
+ i, bw*8/1000000 );
+ tptr+=4;
+ }
+ tptr-=32;
+ break;
+ case SUBTLV_EXT_IS_REACH_TE_METRIC:
+ if (!TTEST2(*tptr,3))
+ goto trunctlv;
+ printf("Traffic Engineering Metric: %d", EXTRACT_24BITS(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("IPv4 interface address: %s", ipaddr_string(tptr));
+ break;
+ case SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
+ if (!TTEST2(*tptr,4))
+ goto trunctlv;
+ printf("IPv4 neighbor address: %s", ipaddr_string(tptr));
+ break;
+ case 250:
+ case 251:
+ case 252:
+ case 253:
+ case 254:
+ printf("Reserved for cisco specific extensions, type %d, length %d", subt, subl);
+ break;
+ case 255:
+ printf("Reserved for future expansion, type %d, length %d", subt, subl);
+ break;
+ default:
+ printf("unknown subTLV, type %d, length %d", subt, subl);
+ }
+ tptr+=subl;
+ ttslen-=(subl+2);
+ }
+ }
+ tptr+=tslen;
+ tmp-=(11+tslen);
+ }
+ break;
+ case TLV_IS_REACH:
+ printf("IS Reachability (%u)",len);
+
+ tptr=pptr;
+
+ if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
+ goto trunctlv;
+
+ switch (*tptr) {
+ case 0:
+ printf("\n\t\t\tIsNotVirtual");
+ break;
+ case 1:
+ printf("\n\t\t\tIsVirtual");
+ break;
+ default:
+ printf("\n\t\t\tbogus virtual flag 0x%02x",(*tptr));
+ break;
+ }
+
+ tptr++;
+
+ tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
+
+ tmp = len;
+ while (tmp >= sizeof(struct isis_tlv_is_reach)) {
+ if (!TTEST(*tlv_is_reach))
+ goto trunctlv;
+
+ printf("\n\t\t\tIS Neighbor: ");
+ isis_print_nodeid(tlv_is_reach->neighbor_nodeid);
+
+ printf(", Default Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_default),
+ ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_default) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_is_reach->metric_delay))
+ printf("\n\t\t\t Delay Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_delay),
+ ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_delay) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_is_reach->metric_expense))
+ printf("\n\t\t\t Expense Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_expense),
+ ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_expense) ? "External" : "Internal");
+
+ if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_is_reach->metric_error))
+ printf("\n\t\t\t Error Metric: %d, %s",
+ ISIS_LSP_TLV_METRIC_VALUE(tlv_is_reach->metric_error),
+ ISIS_LSP_TLV_METRIC_IE(tlv_is_reach->metric_error) ? "External" : "Internal");
+
+ tmp -= sizeof(struct isis_tlv_is_reach);
+ tlv_is_reach++;
+ }
+ break;
+
+ case TLV_IP_REACH:
+ printf("IP Internal reachability (%u)",len);
+ if (!isis_print_tlv_ip_reach(pptr, len))
+ return (1);
+ break;
+
+ case TLV_IP_REACH_EXT:
+ printf("IP External reachability (%u)",len);
+ if (!isis_print_tlv_ip_reach(pptr, len))
+ return (1);
+ break;
+
+ case TLV_EXT_IP_REACH:
+ printf("Extended IP reachability (%u)",len);
+ i=len;
+ tptr=pptr;
+
+ while (i>0) {
+ memset (prefix, 0, 4);
+ if (!TTEST2(*tptr, 4))
+ return (1);
+ metric = EXTRACT_32BITS(tptr);
+ tptr+=4;
+
+ if (!TTEST2(*tptr, 1))
+ return (1);
+ j=*(tptr);
+ bit_length = (*(tptr)++&0x3f);
+ byte_length = (bit_length + 7) / 8;
+ if (!TTEST2(*tptr, byte_length))
+ return (1);
+
+ memcpy(prefix,tptr,byte_length);
+
+ printf("\n\t\t\tIPv4 prefix: %u.%u.%u.%u/%d",
+ prefix[0],
+ prefix[1],
+ prefix[2],
+ prefix[3],
+ bit_length);
+
+ printf("\n\t\t\t Metric: %u, Distribution: %s",
+ metric,
+ ISIS_MASK_TLV_EXT_IP_UPDOWN(j) ? "down" : "up");
+
+ printf(", %ssub-TLVs present",
+ ISIS_MASK_TLV_EXT_IP_SUBTLV(j) ? "" : "no ");
+
+ if (ISIS_MASK_TLV_EXT_IP_SUBTLV(j)) {
+ if (!TTEST2(*tptr, 1))
+ return (1);
+ printf(" (%u)",*tptr); /* no subTLV decoder supported - just print out subTLV length */
+ i-=*tptr;
+ tptr+=*tptr++;
+ }
+
+ i-=(5+byte_length);
+ tptr+=byte_length;
+ }
break;
- case TLV_AUTHENT:
- printf("\n\t\t\t authentication data");
- default_print(pptr, len);
+
+#ifdef INET6
+
+ case TLV_IP6_REACH:
+ printf("IP6 reachability (%u)",len);
+ i=len;
+ tptr=pptr;
+
+ while (i>0) {
+ if (!TTEST2(*tptr, 4))
+ return (1);
+ metric = EXTRACT_32BITS(tptr);
+ tptr+=4;
+
+ if (!TTEST2(*tptr, 2))
+ return (1);
+ j=*(tptr++);
+ bit_length = (*(tptr)++);
+ byte_length = (bit_length + 7) / 8;
+ if (!TTEST2(*tptr, byte_length))
+ return (1);
+
+ memset(prefix6, 0, 16);
+ memcpy(prefix6,tptr,byte_length);
+
+ printf("\n\t\t\tIPv6 prefix: %s/%u",
+ ip6addr_string(prefix6),
+ bit_length);
+
+ printf("\n\t\t\t Metric: %u, %s, Distribution: %s, %ssub-TLVs present",
+ metric,
+ ISIS_MASK_TLV_IP6_IE(j) ? "External" : "Internal",
+ ISIS_MASK_TLV_IP6_UPDOWN(j) ? "down" : "up",
+ ISIS_MASK_TLV_IP6_SUBTLV(j) ? "" : "no ");
+
+ if (ISIS_MASK_TLV_IP6_SUBTLV(j)) {
+ if (!TTEST2(*tptr, 1))
+ return (1);
+ printf(" (%u)",*tptr); /* no subTLV decoder supported - just print out subTLV length */
+ i-=*tptr;
+ tptr+=*tptr++;
+ }
+
+ i-=(6+byte_length);
+ tptr+=byte_length;
+ }
+
break;
+#endif
+
+#ifdef INET6
+ case TLV_IP6ADDR:
+ printf("IPv6 Interface address(es) (%u)",len);
+ i=len;
+ tptr=pptr;
+ while (i>0) {
+ if (!TTEST2(*tptr, 16))
+ goto trunctlv;
+
+ printf("\n\t\t\tIPv6 interface address: %s",
+ ip6addr_string(tptr));
+
+ tptr += 16;
+ i -= 16;
+ }
+ break;
+#endif
+ case TLV_AUTH:
+ if (!TTEST2(*pptr, 1))
+ goto trunctlv;
+ printf("Authentication (%u)",len);
+ if (*pptr==SUBTLV_AUTH_SIMPLE) {
+ printf("\n\t\t\tsimple text password: ");
+ for(i=1;i<len;i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%c",*(pptr+i));
+ }
+ }
+ if (!TTEST2(*pptr, 1))
+ goto trunctlv;
+ if (*pptr==SUBTLV_AUTH_MD5) {
+ printf("\n\t\t\tMD5 password: ");
+ for(i=1;i<len;i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%02x",*(pptr+i));
+ }
+ }
+ break;
+
case TLV_PTP_ADJ:
- printf("\n\t\t\t PTP adjacency status %s",
- isis_ptp_adjancey_values[*pptr].name);
+ printf("Point-to-point Adjacency State (%u)",len);
+ tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)pptr;
+ i=len;
+ if(i>=1) {
+ if (!TTEST2(*pptr, 1))
+ goto trunctlv;
+ printf("\n\t\t\tAdjacency State: %s",
+ tok2str(isis_ptp_adjancey_values, "#0x%x", *pptr));
+ i--;
+ }
+ if(i>=4) {
+ if (!TTEST2(tlv_ptp_adj->ext_local_circuit_id, 4))
+ goto trunctlv;
+ printf("\n\t\t\tExtended Local circuit ID: 0x%08x",
+ EXTRACT_32BITS(tlv_ptp_adj->ext_local_circuit_id));
+ i-=4;
+ }
+ if(i>=6) {
+ if (!TTEST2(tlv_ptp_adj->neighbor_sysid, 6))
+ goto trunctlv;
+ printf("\n\t\t\tNeighbor SystemID: ");
+ isis_print_sysid(tlv_ptp_adj->neighbor_sysid);
+ i-=6;
+ }
+ if(i>=4) {
+ if (!TTEST2(tlv_ptp_adj->neighbor_ext_local_circuit_id, 4))
+ goto trunctlv;
+ printf("\n\t\t\tNeighbor Extended Local circuit ID: 0x%08x",
+ EXTRACT_32BITS(tlv_ptp_adj->neighbor_ext_local_circuit_id));
+ }
break;
+
case TLV_PROTOCOLS:
- printf("\n\t\t\t Supports protocols %s", (len>1)? "are":"is");
- for(i=0;i<len;i++)
- printf(" %02X", (u_char)*(pptr+i));
+ printf("Protocols supported (%u)", len);
+ printf("\n\t\t\tNLPID(s): ");
+ for (i = 0; i < len; i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%s (0x%02x)",tok2str(isis_nlpid_values, "Unknown", *(pptr+i)),*(pptr+i));
+ if (i<len-1)
+ printf(", ");
+ }
break;
+
+ case TLV_TE_ROUTER_ID:
+ printf("Traffic Engineering Router ID (%u)",len);
+ if (!TTEST2(*pptr, 4))
+ goto trunctlv;
+ printf("\n\t\t\tTraffic Engineering Router ID: %s", ipaddr_string(pptr));
+ break;
+
case TLV_IPADDR:
- printf("\n\t\t\t IP address: %s", ipaddr_string(pptr));
+ printf("IPv4 Interface address(es) (%u)",len);
+ i=len;
+ tptr=pptr;
+ while (i>0) {
+ if (!TTEST2(*tptr, 4))
+ goto trunctlv;
+ printf("\n\t\t\tIPv4 interface address: %s", ipaddr_string(tptr));
+ tptr += 4;
+ i -= 4;
+ }
+ break;
+
+ case TLV_HOSTNAME:
+ printf("Hostname (%u)", len);
+ printf("\n\t\t\tHostname: ");
+ for(i = 0; i < len; i++) {
+ if (!TTEST2(*(pptr+i), 1))
+ goto trunctlv;
+ printf("%c",*(pptr+i));
+ }
+ break;
+
+ case TLV_LSP:
+ tlv_lsp = (const struct isis_tlv_lsp *)pptr;
+ printf("LSP entries (%u)", len);
+ i=0;
+ while(i<len) {
+ printf("\n\t\t\tlsp-id: ");
+ if (!isis_print_nodeid(tlv_lsp->lsp_id))
+ return (1);
+ if (!TTEST((tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1]))
+ goto trunctlv;
+ printf("-%02x",(tlv_lsp->lsp_id)[SYSTEM_ID_LEN+1]);
+ if (!TTEST2(tlv_lsp->sequence_number, 4))
+ goto trunctlv;
+ printf("\n\t\t\t sequence number: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number));
+ if (!TTEST2(tlv_lsp->remaining_lifetime, 2))
+ goto trunctlv;
+ printf("\n\t\t\t Remaining lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime));
+ if (!TTEST2(tlv_lsp->checksum, 2))
+ goto trunctlv;
+ printf("\n\t\t\t checksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum));
+ i+=sizeof(struct isis_tlv_lsp);
+ tlv_lsp++;
+ }
+ break;
+
+ case TLV_CHECKSUM:
+ if (!TTEST2(*pptr, 2))
+ goto trunctlv;
+ printf("Checksum (%u)", len);
+ printf("\n\t\t\tchecksum: 0x%04x",
+ EXTRACT_16BITS(pptr));
+
+ if (osi_cksum(optr, length, off))
+ printf(" (incorrect)");
+ else
+ printf(" (correct)");
+ break;
+
+ case TLV_MT_SUPPORTED:
+ printf("Multi Topology (%u)",len);
+ i=len;
+ tptr=pptr;
+ while (i>1) {
+ /* length can only be a multiple of 2, otherwise there is
+ something broken -> so decode down until length is 1 */
+ if (i!=1) {
+ if (!TTEST2(*tptr, 2))
+ goto trunctlv;
+ printf("\n\t\t\t");
+ switch(EXTRACT_16BITS(tptr)&0x0fff) {
+
+ case 0:
+ printf("IPv4 unicast");
+ break;
+
+ case 1:
+ printf("In-Band Management");
+ break;
+
+ case 2:
+ printf("IPv6 unicast");
+ break;
+
+ case 3:
+ printf("Multicast");
+ break;
+
+ case 4095:
+ printf("Development, Experimental or Proprietary");
+ break;
+
+ default:
+ printf("Reserved for IETF Consensus");
+ break;
+ }
+ printf(" Topology (0x%03x)%s%s",
+ EXTRACT_16BITS(tptr)&0xfff,
+ (EXTRACT_16BITS(tptr)&0x8000) ? "" : ", no sub-TLVs present",
+ (EXTRACT_16BITS(tptr)&0x4000) ? ", ATT bit set" : "" );
+ } else {
+ printf("\n\t\t\tmalformed MT-ID");
+ break;
+ }
+ i-=2;
+ tptr+=2;
+ }
+ break;
+
+ case TLV_RESTART_SIGNALING:
+ tptr=pptr;
+ printf("Restart Signaling (%u)",len);
+ if (!TTEST2(*tptr, 3))
+ goto trunctlv;
+
+ printf("\n\t\t\tRestart Request bit %s, Restart Acknowledgement bit %s\n\t\t\tRemaining holding time: %us",
+ ISIS_MASK_RESTART_RR(*tptr) ? "set" : "clear",
+ ISIS_MASK_RESTART_RA(*tptr++) ? "set" : "clear",
+ EXTRACT_16BITS(tptr));
+
break;
+
default:
- printf("\n\t\t\t unknown TLV, type %d, length %d", type, len);
+ printf("unknown TLV, type %d, length %d\n\t\t\t", type, len);
+ tptr=pptr;
+
+ for(i=0;i<len;i++) {
+ if (!TTEST2(*(tptr+i), 1))
+ goto trunctlv;
+ printf("%02x",*(tptr+i)); /* formatted hex output of unknown TLV data */
+ if (i%2)
+ printf(" ");
+ if (i/16!=(i+1)/16) {
+ if (i<(len-1))
+ printf("\n\t\t\t");
+ }
+ }
break;
}
@@ -647,6 +1546,14 @@ isis_print (const u_char *p, u_int length)
if (packet_len != 0) {
printf("\n\t\t\t %d straggler bytes", packet_len);
}
+ return (1);
+
+trunc:
+ fputs("[|isis]", stdout);
+ return (1);
+
+trunctlv:
+ printf("\n\t\t\t packet exceeded snapshot");
return(1);
}
@@ -655,7 +1562,7 @@ isis_print (const u_char *p, u_int length)
*/
static int
-osi_cksum(register const u_char *p, register int len, u_char *off)
+osi_cksum(register const u_char *p, register u_int len, u_char *off)
{
int32_t c0 = 0, c1 = 0;
@@ -671,3 +1578,4 @@ osi_cksum(register const u_char *p, register int len, u_char *off)
}
return (c0 | c1);
}
+
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