* Original code by Matt Thomas, Digital Equipment Corporation
*
- * complete IS-IS support.
+ * complete IS-IS & CLNP support.
*/
#ifndef lint
static const char rcsid[] _U_ =
- "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.118 2004-03-18 10:58:17 hannes Exp $ (LBL)";
+ "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.138 2005-04-26 07:14:07 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "addrtoname.h"
#include "ethertype.h"
#include "ether.h"
+#include "nlpid.h"
#include "extract.h"
#include "gmpls.h"
#include "oui.h"
-#define NLPID_CLNP 0x81 /* iso9577 */
-#define NLPID_ESIS 0x82 /* iso9577 */
-#define NLPID_ISIS 0x83 /* iso9577 */
-#define NLPID_IP6 0x8e
-#define NLPID_IP 0xcc
-#define NLPID_NULLNS 0
-
-static struct tok osi_nlpid_values[] = {
- { NLPID_NULLNS, "NULL-NS"},
- { NLPID_CLNP, "CLNP"},
- { NLPID_ESIS, "ES-IS"},
- { NLPID_ISIS, "IS-IS"},
- { NLPID_IP, "IPv4"},
- { NLPID_IP6, "IPv6"},
- { 0, NULL }
-};
-
#define IPV4 1 /* AFI value */
#define IPV6 2 /* AFI value */
#define SYSTEM_ID_LEN ETHER_ADDR_LEN
#define NODE_ID_LEN SYSTEM_ID_LEN+1
#define LSP_ID_LEN SYSTEM_ID_LEN+2
-#define NSAP_MAX_LENGTH 20
#define ISIS_VERSION 1
#define ESIS_VERSION 1
+#define CLNP_VERSION 1
#define ISIS_PDU_TYPE_MASK 0x1F
#define ESIS_PDU_TYPE_MASK 0x1F
#define CLNP_PDU_TYPE_MASK 0x1F
+#define CLNP_FLAG_MASK 0xE0
#define ISIS_LAN_PRIORITY_MASK 0x7F
#define ISIS_PDU_L1_LAN_IIH 15
{ 0, NULL }
};
+#define CLNP_OPTION_DISCARD_REASON 193
+#define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */
+#define CLNP_OPTION_PRIORITY 205 /* iso8473 */
+
+static struct tok clnp_option_values[] = {
+ { CLNP_OPTION_DISCARD_REASON, "Discard Reason"},
+ { CLNP_OPTION_PRIORITY, "Priority"},
+ { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_class_values[] = {
+ { 0x0, "General"},
+ { 0x8, "Address"},
+ { 0x9, "Source Routeing"},
+ { 0xa, "Lifetime"},
+ { 0xb, "PDU Discarded"},
+ { 0xc, "Reassembly"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_general_values[] = {
+ { 0x0, "Reason not specified"},
+ { 0x1, "Protocol procedure error"},
+ { 0x2, "Incorrect checksum"},
+ { 0x3, "PDU discarded due to congestion"},
+ { 0x4, "Header syntax error (cannot be parsed)"},
+ { 0x5, "Segmentation needed but not permitted"},
+ { 0x6, "Incomplete PDU received"},
+ { 0x7, "Duplicate option"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_address_values[] = {
+ { 0x0, "Destination address unreachable"},
+ { 0x1, "Destination address unknown"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_source_routeing_values[] = {
+ { 0x0, "Unspecified source routeing error"},
+ { 0x1, "Syntax error in source routeing field"},
+ { 0x2, "Unknown address in source routeing field"},
+ { 0x3, "Path not acceptable"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_lifetime_values[] = {
+ { 0x0, "Lifetime expired while data unit in transit"},
+ { 0x1, "Lifetime expired during reassembly"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_pdu_discard_values[] = {
+ { 0x0, "Unsupported option not specified"},
+ { 0x1, "Unsupported protocol version"},
+ { 0x2, "Unsupported security option"},
+ { 0x3, "Unsupported source routeing option"},
+ { 0x4, "Unsupported recording of route option"},
+ { 0, NULL }
+};
+
+static struct tok clnp_option_rfd_reassembly_values[] = {
+ { 0x0, "Reassembly interference"},
+ { 0, NULL }
+};
+
+/* array of 16 error-classes */
+static struct tok *clnp_option_rfd_error_class[] = {
+ clnp_option_rfd_general_values,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ clnp_option_rfd_address_values,
+ clnp_option_rfd_source_routeing_values,
+ clnp_option_rfd_lifetime_values,
+ clnp_option_rfd_pdu_discard_values,
+ clnp_option_rfd_reassembly_values,
+ NULL,
+ NULL,
+ NULL
+};
+
+
#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* draft-ietf-isis-gmpls-extensions */
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */
{ 0, NULL}
};
+#define CLNP_SEGMENT_PART 0x80
+#define CLNP_MORE_SEGMENTS 0x40
+#define CLNP_REQUEST_ER 0x20
+
+static struct tok clnp_flag_values[] = {
+ { CLNP_SEGMENT_PART, "Segmentation permitted"},
+ { CLNP_MORE_SEGMENTS, "more Segments"},
+ { CLNP_REQUEST_ER, "request Error Report"},
+ { 0, NULL}
+};
+
#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)
u_int8_t checksum[2];
};
-static char *
-print_nsap(register const u_int8_t *pptr, register int nsap_length)
-{
- int nsap_idx;
- static char nsap_ascii_output[sizeof("xx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xxxx.xx")];
- char *junk_buf = nsap_ascii_output;
-
- if (nsap_length < 1 || nsap_length > NSAP_MAX_LENGTH) {
- snprintf(nsap_ascii_output, sizeof(nsap_ascii_output),
- "illegal length");
- return (nsap_ascii_output);
- }
-
- for (nsap_idx = 0; nsap_idx < nsap_length; nsap_idx++) {
- if (!TTEST2(*pptr, 1))
- return (0);
- snprintf(junk_buf,
- sizeof(nsap_ascii_output) - (junk_buf - nsap_ascii_output),
- "%02x", *pptr++);
- junk_buf += strlen(junk_buf);
- if (((nsap_idx & 1) == 0) &&
- (nsap_idx + 1 < nsap_length)) {
- *junk_buf++ = '.';
- }
- }
- *(junk_buf) = '\0';
- return (nsap_ascii_output);
-}
-
#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))
return;
}
- printf("%s",tok2str(osi_nlpid_values,"Unknown NLPID (0x%02x)",*p));
+ if (eflag)
+ printf("OSI NLPID %s (0x%02x): ",
+ tok2str(nlpid_values,"Unknown",*p),
+ *p);
switch (*p) {
break;
case NLPID_NULLNS:
- (void)printf(", length: %u", length);
+ (void)printf("%slength: %u",
+ eflag ? "" : ", ",
+ length);
break;
+ case NLPID_Q933:
+ q933_print(p+1, length-1);
+ break;
+
+ case NLPID_IP:
+ ip_print(gndo, p+1, length-1);
+ break;
+
+#ifdef INET6
+ case NLPID_IP6:
+ ip6_print(p+1, length-1);
+ break;
+#endif
+
+ case NLPID_PPP:
+ ppp_print(p+1, length-1);
+ break;
+
default:
- (void)printf(", length: %u", length);
+ if (!eflag)
+ printf("OSI NLPID 0x%02x unknown",*p);
+ (void)printf("%slength: %u",
+ eflag ? "" : ", ",
+ length);
if (caplen > 1)
print_unknown_data(p,"\n\t",caplen);
break;
u_int8_t cksum[2];
};
+struct clnp_segment_header_t {
+ u_int8_t data_unit_id[2];
+ u_int8_t segment_offset[2];
+ u_int8_t total_length[2];
+};
+
/*
* clnp_print
* Decode CLNP packets. Return 0 on error.
static int clnp_print (const u_int8_t *pptr, u_int length)
{
const u_int8_t *optr,*source_address,*dest_address;
- u_int li,source_address_length,dest_address_length, clnp_pdu_type;
+ u_int li,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
const struct clnp_header_t *clnp_header;
+ const struct clnp_segment_header_t *clnp_segment_header;
+ u_int8_t rfd_error_major,rfd_error_minor;
clnp_header = (const struct clnp_header_t *) pptr;
+ TCHECK(*clnp_header);
+
li = clnp_header->length_indicator;
optr = pptr;
+ if (!eflag)
+ printf("CLNP");
+
/*
* Sanity checking of the header.
*/
- /* FIXME */
+ if (clnp_header->version != CLNP_VERSION) {
+ printf("version %d packet not supported", clnp_header->version);
+ return (0);
+ }
+
+ /* FIXME further header sanity checking */
clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK;
+ clnp_flags = clnp_header->type & CLNP_FLAG_MASK;
pptr += sizeof(struct clnp_header_t);
+ li -= sizeof(struct clnp_header_t);
dest_address_length = *pptr;
dest_address = pptr + 1;
pptr += (1 + dest_address_length);
+ li -= (1 + dest_address_length);
source_address_length = *pptr;
source_address = pptr +1;
pptr += (1 + source_address_length);
+ li -= (1 + source_address_length);
if (vflag < 1) {
- printf(", %s > %s, length %u",
- print_nsap(source_address, source_address_length),
- print_nsap(dest_address, dest_address_length),
+ printf("%s%s > %s, %s, length %u",
+ eflag ? "" : ", ",
+ isonsap_string(source_address, source_address_length),
+ isonsap_string(dest_address, dest_address_length),
+ tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
length);
return (1);
}
- printf(", length %u", length);
-
- printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, PDU length: %u, checksum: 0x%04x ",
- tok2str(clnp_pdu_values,
- "unknown (%u)",
- clnp_pdu_type),
- clnp_header->length_indicator,
- clnp_header->version,
- clnp_header->lifetime/2,
- (clnp_header->lifetime%2)*5,
- EXTRACT_16BITS(clnp_header->segment_length),
- EXTRACT_16BITS(clnp_header->cksum));
+ printf("%slength %u",eflag ? "" : ", ",length);
+
+ printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x ",
+ tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type),
+ clnp_header->length_indicator,
+ clnp_header->version,
+ clnp_header->lifetime/2,
+ (clnp_header->lifetime%2)*5,
+ EXTRACT_16BITS(clnp_header->segment_length),
+ EXTRACT_16BITS(clnp_header->cksum));
/* do not attempt to verify the checksum if it is zero */
if (EXTRACT_16BITS(clnp_header->cksum) == 0)
printf("(unverified)");
- else printf("(%s)", osi_cksum(optr, li) ? "incorrect" : "correct");
+ else printf("(%s)", osi_cksum(optr, clnp_header->length_indicator) ? "incorrect" : "correct");
+
+ printf("\n\tFlags [%s]",
+ bittok2str(clnp_flag_values,"none",clnp_flags));
printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
source_address_length,
- print_nsap(source_address, source_address_length),
+ isonsap_string(source_address, source_address_length),
dest_address_length,
- print_nsap(dest_address, dest_address_length));
+ isonsap_string(dest_address,dest_address_length));
+
+ if (clnp_flags & CLNP_SEGMENT_PART) {
+ clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
+ printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
+ EXTRACT_16BITS(clnp_segment_header->data_unit_id),
+ EXTRACT_16BITS(clnp_segment_header->segment_offset),
+ EXTRACT_16BITS(clnp_segment_header->total_length));
+ pptr+=sizeof(const struct clnp_segment_header_t);
+ li-=sizeof(const struct clnp_segment_header_t);
+ }
+
+ /* now walk the options */
+ while (li >= 2) {
+ u_int op, opli;
+ const u_int8_t *tptr;
+
+ TCHECK2(*pptr, 2);
+ if (li < 2) {
+ printf(", bad opts/li");
+ return (0);
+ }
+ op = *pptr++;
+ opli = *pptr++;
+ li -= 2;
+ TCHECK2(*pptr, opli);
+ if (opli > li) {
+ printf(", opt (%d) too long", op);
+ return (0);
+ }
+ li -= opli;
+ tptr = pptr;
+
+ printf("\n\t %s Option #%u, length %u, value: ",
+ tok2str(clnp_option_values,"Unknown",op),
+ op,
+ opli);
- /* dump the remaining header data */
- print_unknown_data(pptr,"\n\t",clnp_header->length_indicator-(pptr-optr));
+ switch (op) {
+
+ case CLNP_OPTION_PRIORITY:
+ printf("%u", *tptr);
+ break;
+
+ case CLNP_OPTION_DISCARD_REASON:
+ rfd_error_major = (*tptr&0xf0) >> 4;
+ rfd_error_minor = *tptr&0x0f;
+ printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)",
+ tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major),
+ rfd_error_major,
+ tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor),
+ rfd_error_minor);
+ break;
+
+ /*
+ * FIXME those are the defined Options that lack a decoder
+ * you are welcome to contribute code ;-)
+ */
+
+ default:
+ print_unknown_data(tptr,"\n\t ",opli);
+ break;
+ }
+ if (vflag > 1)
+ print_unknown_data(pptr,"\n\t ",opli);
+ pptr += opli;
+ }
switch (clnp_pdu_type) {
- case CLNP_PDU_ER:
+ case CLNP_PDU_ER: /* fall through */
+ case CLNP_PDU_ERP:
+ TCHECK(*pptr);
+ if (*(pptr) == NLPID_CLNP) {
+ printf("\n\t-----original packet-----\n\t");
+ /* FIXME recursion protection */
+ clnp_print(pptr, length-clnp_header->length_indicator);
+ break;
+ }
+
case CLNP_PDU_DT:
case CLNP_PDU_MD:
case CLNP_PDU_ERQ:
- case CLNP_PDU_ERP:
-
+
default:
/* dump the PDU specific data */
- print_unknown_data(optr+clnp_header->length_indicator,"\n\t ",length-clnp_header->length_indicator);
-
+ if (length-(pptr-optr) > 0) {
+ printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator);
+ print_unknown_data(pptr,"\n\t ",length-(pptr-optr));
+ }
}
return (1);
+
+ trunc:
+ fputs("[|clnp]", stdout);
+ return (1);
+
}
u_int li,esis_pdu_type,source_address_length, source_address_number;
const struct esis_header_t *esis_header;
+ if (!eflag)
+ printf("ES-IS");
+
if (length <= 2) {
if (qflag)
- printf(" bad pkt!");
+ printf("bad pkt!");
else
- printf(" no header at all!");
+ printf("no header at all!");
return;
}
esis_header = (const struct esis_header_t *) pptr;
+ TCHECK(*esis_header);
li = esis_header->length_indicator;
optr = pptr;
*/
if (esis_header->nlpid != NLPID_ESIS) {
- printf(", nlpid 0x%02x packet not supported", esis_header->nlpid);
+ printf(" nlpid 0x%02x packet not supported", esis_header->nlpid);
return;
}
if (esis_header->version != ESIS_VERSION) {
- printf(", version %d packet not supported", esis_header->version);
+ printf(" version %d packet not supported", esis_header->version);
return;
}
if (li > length) {
- printf(", length indicator(%d) > PDU size (%d)!", li, length);
+ printf(" length indicator(%d) > PDU size (%d)!", li, length);
return;
}
if (li < sizeof(struct esis_header_t) + 2) {
- printf(", length indicator < min PDU size %d:", li);
+ printf(" length indicator < min PDU size %d:", li);
while (--length != 0)
printf("%02X", *pptr++);
return;
esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK;
if (vflag < 1) {
- printf(", %s, length %u",
+ printf("%s%s, length %u",
+ eflag ? "" : ", ",
tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
length);
return;
} else
- printf(", length %u\n\t%s (%u)",
+ printf("%slength %u\n\t%s (%u)",
+ eflag ? "" : ", ",
length,
tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
esis_pdu_type);
/* do not attempt to verify the checksum if it is zero */
if (EXTRACT_16BITS(esis_header->cksum) == 0)
printf("(unverified)");
- else printf("(%s)", osi_cksum(pptr, li) ? "incorrect" : "correct");
+ else
+ printf("(%s)", osi_cksum(pptr, li) ? "incorrect" : "correct");
printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li);
switch (esis_pdu_type) {
case ESIS_PDU_REDIRECT: {
- const u_int8_t *dst, *snpa, *tptr;
+ const u_int8_t *dst, *snpa, *neta;
+ u_int dstl, snpal, netal;
- dst = pptr; pptr += *pptr + 1;
- if (pptr > snapend)
+ TCHECK(*pptr);
+ if (li < 1) {
+ printf(", bad redirect/li");
return;
- printf("\n\t %s", isonsap_string(dst));
- snpa = pptr; pptr += *pptr + 1;
- tptr = pptr; pptr += *pptr + 1;
- if (pptr > snapend)
+ }
+ dstl = *pptr;
+ pptr++;
+ li--;
+ TCHECK2(*pptr, dstl);
+ if (li < dstl) {
+ printf(", bad redirect/li");
return;
+ }
+ dst = pptr;
+ pptr += dstl;
+ li -= dstl;
+ printf("\n\t %s", isonsap_string(dst,dstl));
+
+ TCHECK(*pptr);
+ if (li < 1) {
+ printf(", bad redirect/li");
+ return;
+ }
+ snpal = *pptr;
+ pptr++;
+ li--;
+ TCHECK2(*pptr, snpal);
+ if (li < snpal) {
+ printf(", bad redirect/li");
+ return;
+ }
+ snpa = pptr;
+ pptr += snpal;
+ li -= snpal;
+ TCHECK(*pptr);
+ if (li < 1) {
+ printf(", bad redirect/li");
+ return;
+ }
+ netal = *pptr;
+ pptr++;
+ TCHECK2(*pptr, netal);
+ if (li < netal) {
+ printf(", bad redirect/li");
+ return;
+ }
+ neta = pptr;
+ pptr += netal;
+ li -= netal;
- if (tptr[0] == 0)
- printf("\n\t %s", etheraddr_string(&snpa[1]));
+ if (netal == 0)
+ printf("\n\t %s", etheraddr_string(snpa));
else
- printf("\n\t %s", isonsap_string(tptr));
+ printf("\n\t %s", isonsap_string(neta,netal));
break;
}
case ESIS_PDU_ESH:
+ TCHECK(*pptr);
+ if (li < 1) {
+ printf(", bad esh/li");
+ return;
+ }
source_address_number = *pptr;
pptr++;
li--;
printf("\n\t Number of Source Addresses: %u", source_address_number);
while (source_address_number > 0) {
+ TCHECK(*pptr);
+ if (li < 1) {
+ printf(", bad esh/li");
+ return;
+ }
source_address_length = *pptr;
+ pptr++;
+ li--;
+
+ TCHECK2(*pptr, source_address_length);
+ if (li < source_address_length) {
+ printf(", bad esh/li");
+ return;
+ }
printf("\n\t NET (length: %u): %s",
source_address_length,
- print_nsap(pptr+1, source_address_length));
-
- pptr += source_address_length+1;
- li -= source_address_length+1;
+ isonsap_string(pptr,source_address_length));
+ pptr += source_address_length;
+ li -= source_address_length;
source_address_number--;
}
break;
case ESIS_PDU_ISH: {
+ TCHECK(*pptr);
+ if (li < 1) {
+ printf(", bad ish/li");
+ return;
+ }
source_address_length = *pptr;
- printf("\n\t NET (length: %u): %s", source_address_length, print_nsap(pptr+1, source_address_length));
- pptr += source_address_length+1;
- li -= source_address_length +1;
+ pptr++;
+ li--;
+ TCHECK2(*pptr, source_address_length);
+ if (li < source_address_length) {
+ printf(", bad ish/li");
+ return;
+ }
+ printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length));
+ pptr += source_address_length;
+ li -= source_address_length;
break;
}
u_int op, opli;
const u_int8_t *tptr;
- if (snapend - pptr < 2)
- return;
+ TCHECK2(*pptr, 2);
if (li < 2) {
printf(", bad opts/li");
return;
li -= opli;
tptr = pptr;
- if (snapend < pptr)
- return;
-
printf("\n\t %s Option #%u, length %u, value: ",
tok2str(esis_option_values,"Unknown",op),
op,
switch (op) {
case ESIS_OPTION_ES_CONF_TIME:
+ TCHECK2(*pptr, 2);
printf("%us", EXTRACT_16BITS(tptr));
break;
-
case ESIS_OPTION_PROTOCOLS:
while (opli>0) {
+ TCHECK(*pptr);
printf("%s (0x%02x)",
- tok2str(osi_nlpid_values,
+ tok2str(nlpid_values,
"unknown",
*tptr),
*tptr);
print_unknown_data(pptr,"\n\t ",opli);
pptr += opli;
}
+trunc:
+ return;
}
/* shared routine for printing system, node and lsp-ids */
case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP:
case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID:
case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID:
- printf(", 0x%08x", EXTRACT_32BITS(tptr));
- if (subl == 8) /* draft-ietf-isis-gmpls-extensions */
- printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
+ if (subl >= 4) {
+ printf(", 0x%08x", EXTRACT_32BITS(tptr));
+ if (subl == 8) /* draft-ietf-isis-gmpls-extensions */
+ printf(", 0x%08x", EXTRACT_32BITS(tptr+4));
+ }
break;
case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
- printf(", %s", ipaddr_string(tptr));
+ if (subl >= 4)
+ printf(", %s", ipaddr_string(tptr));
break;
case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
- bw.i = EXTRACT_32BITS(tptr);
- printf(", %.3f Mbps", bw.f*8/1000000 );
+ if (subl >= 4) {
+ bw.i = EXTRACT_32BITS(tptr);
+ printf(", %.3f Mbps", bw.f*8/1000000 );
+ }
break;
case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
- for (priority_level = 0; priority_level < 8; priority_level++) {
+ if (subl >= 32) {
+ for (priority_level = 0; priority_level < 8; priority_level++) {
bw.i = EXTRACT_32BITS(tptr);
printf("%s priority level %d: %.3f Mbps",
ident,
priority_level,
bw.f*8/1000000 );
tptr+=4;
+ }
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_DIFFSERV_TE:
- printf("%sBandwidth Constraints Model ID: (%u)",ident, *tptr);
- tptr+=4;
- /* for now lets just print the first 8 BCs -
- * FIXME is this dep. on the BC model ?
- */
- for (bandwidth_constraint = 0; bandwidth_constraint < 8; bandwidth_constraint++) {
+ printf("%sBandwidth Constraints Model ID: %s (%u)",
+ ident,
+ tok2str(diffserv_te_bc_values, "unknown", *tptr),
+ *tptr);
+ tptr++;
+ /* decode BCs until the subTLV ends */
+ for (bandwidth_constraint = 0; bandwidth_constraint < (subl-1)/4; bandwidth_constraint++) {
bw.i = EXTRACT_32BITS(tptr);
printf("%s Bandwidth constraint %d: %.3f Mbps",
ident,
}
break;
case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
- printf(", %u", EXTRACT_24BITS(tptr));
+ if (subl >= 3)
+ printf(", %u", EXTRACT_24BITS(tptr));
break;
case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
- printf(", %s, Priority %u",
+ if (subl >= 2) {
+ printf(", %s, Priority %u",
bittok2str(gmpls_link_prot_values, "none", *tptr),
*(tptr+1));
+ }
break;
case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
- printf("%s Interface Switching Capability:%s",
+ if (subl >= 36) {
+ printf("%s Interface Switching Capability:%s",
ident,
tok2str(gmpls_switch_cap_values, "Unknown", *(tptr)));
- printf(", LSP Encoding: %s",
+ printf(", LSP Encoding: %s",
tok2str(gmpls_encoding_values, "Unknown", *(tptr+1)));
- tptr+=4;
- printf("%s Max LSP Bandwidth:",ident);
- for (priority_level = 0; priority_level < 8; priority_level++) {
+ tptr+=4;
+ printf("%s Max LSP Bandwidth:",ident);
+ for (priority_level = 0; priority_level < 8; priority_level++) {
bw.i = EXTRACT_32BITS(tptr);
printf("%s priority level %d: %.3f Mbps",
ident,
priority_level,
bw.f*8/1000000 );
tptr+=4;
- }
- subl-=36;
- /* there is some optional stuff left to decode but this is as of yet
- not specified so just lets hexdump what is left */
- if(subl>0){
+ }
+ subl-=36;
+ /* there is some optional stuff left to decode but this is as of yet
+ not specified so just lets hexdump what is left */
+ if(subl>0){
if(!print_unknown_data(tptr,"\n\t\t ",
subl-36))
return(0);
+ }
}
break;
default:
header_csnp = (const struct isis_csnp_header *)pptr;
header_psnp = (const struct isis_psnp_header *)pptr;
+ if (!eflag)
+ printf("IS-IS");
+
/*
* Sanity checking of the header.
*/
if (isis_header->version != ISIS_VERSION) {
- printf(", version %d packet not supported", isis_header->version);
+ printf("version %d packet not supported", isis_header->version);
return (0);
}
if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
- printf(", system ID length of %d is not supported",
+ printf("system ID length of %d is not supported",
isis_header->id_length);
return (0);
}
if (isis_header->pdu_version != ISIS_VERSION) {
- printf(", version %d packet not supported", isis_header->pdu_version);
+ printf("version %d packet not supported", isis_header->pdu_version);
return (0);
}
max_area = 3; /* silly shit */
break;
case 255:
- printf(", bad packet -- 255 areas");
+ printf("bad packet -- 255 areas");
return (0);
default:
break;
/* toss any non 6-byte sys-ID len PDUs */
if (id_length != 6 ) {
- printf(", bad packet -- illegal sys-ID length (%u)", id_length);
+ printf("bad packet -- illegal sys-ID length (%u)", id_length);
return (0);
}
/* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
if (vflag < 1) {
- printf(", %s", tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type));
+ printf("%s%s",
+ eflag ? "" : ", ",
+ tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type));
switch (pdu_type) {
break;
case ISIS_PDU_L1_CSNP:
case ISIS_PDU_L2_CSNP:
- printf(", src-id %s", isis_print_id(header_csnp->source_id,SYSTEM_ID_LEN));
+ printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN));
break;
case ISIS_PDU_L1_PSNP:
case ISIS_PDU_L2_PSNP:
- printf(", src-id %s", isis_print_id(header_psnp->source_id,SYSTEM_ID_LEN));
+ printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN));
break;
}
}
/* ok they seem to want to know everything - lets fully decode it */
- printf(", length: %u",length);
+ printf("%slength %u", eflag ? "" : ", ",length);
printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
tok2str(isis_pdu_values,
tlv_type,
tlv_len);
+ if (tlv_len == 0) /* something is malformed */
+ break;
+
/* now check if we have a decoder otherwise do a hexdump at the end*/
switch (tlv_type) {
case ISIS_TLV_AREA_ADDR:
while (tmp && alen < tmp) {
printf("\n\t Area address (length: %u): %s",
alen,
- print_nsap(tptr, alen));
+ isonsap_string(tptr,alen));
tptr += alen;
tmp -= alen + 1;
if (tmp==0) /* if this is the last area address do not attemt a boundary check */
break;
case ISIS_TLV_ISNEIGH_VARLEN:
- if (!TTEST2(*tptr, 1))
+ if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
goto trunctlv;
- lan_alen = *tptr++; /* LAN adress length */
+ lan_alen = *tptr++; /* LAN address length */
+ if (lan_alen == 0) {
+ printf("\n\t LAN address length 0 bytes (invalid)");
+ break;
+ }
tmp --;
printf("\n\t LAN address length %u bytes ",lan_alen);
while (tmp >= lan_alen) {
if (!TTEST2(*(tptr), 1))
goto trunctlv;
printf("%s (0x%02x)",
- tok2str(osi_nlpid_values,
+ tok2str(nlpid_values,
"unknown",
*tptr),
*tptr);
if (!TTEST2(*tptr, 1))
goto trunctlv;
prefix_len=*tptr++; /* read out prefix length in semioctets*/
+ if (prefix_len < 2) {
+ printf("\n\t\tAddress: prefix length %u < 2", prefix_len);
+ break;
+ }
tmp--;
if (!TTEST2(*tptr, prefix_len/2))
goto trunctlv;
printf("\n\t\tAddress: %s/%u",
- print_nsap(tptr,prefix_len/2),
+ isonsap_string(tptr,prefix_len/2),
prefix_len*4);
tptr+=prefix_len/2;
tmp-=prefix_len/2;
}
return (c0 | c1);
}
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */
projects / tcpdump / blobdiff