*
* Original code by Matt Thomas, Digital Equipment Corporation
*
- * Extensively modified by Hannes Gredler (hannes@juniper.net) for more
+ * Extensively modified by Hannes Gredler (hannes@gredler.at) for more
* complete IS-IS & CLNP support.
*/
-#define NETDISSECT_REWORKED
+/* \summary: ISO CLNS, ESIS, and ISIS printer */
+
+/*
+ * specification:
+ *
+ * CLNP: ISO 8473 (respective ITU version is at http://www.itu.int/rec/T-REC-X.233/en/)
+ * ES-IS: ISO 9542
+ * IS-IS: ISO 10589
+ */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <tcpdump-stdinc.h>
+#include "netdissect-stdinc.h"
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "addrtoname.h"
-#include "ether.h"
#include "nlpid.h"
#include "extract.h"
#include "gmpls.h"
#include "oui.h"
#include "signature.h"
+
/*
* IS-IS is defined in ISO 10589. Look there for protocol definitions.
*/
-#define SYSTEM_ID_LEN ETHER_ADDR_LEN
-#define NODE_ID_LEN SYSTEM_ID_LEN+1
-#define LSP_ID_LEN SYSTEM_ID_LEN+2
+#define SYSTEM_ID_LEN MAC_ADDR_LEN
+#define NODE_ID_LEN (SYSTEM_ID_LEN+1)
+#define LSP_ID_LEN (SYSTEM_ID_LEN+2)
#define ISIS_VERSION 1
#define ESIS_VERSION 1
#define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */
#define ISIS_TLV_CHECKSUM 12 /* rfc3358 */
#define ISIS_TLV_CHECKSUM_MINLEN 2
+#define ISIS_TLV_POI 13 /* rfc6232 */
#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */
#define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2
-#define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */
-#define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */
+#define ISIS_TLV_EXT_IS_REACH 22 /* rfc5305 */
+#define ISIS_TLV_IS_ALIAS_ID 24 /* rfc5311 */
#define ISIS_TLV_DECNET_PHASE4 42
#define ISIS_TLV_LUCENT_PRIVATE 66
#define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */
#define ISIS_TLV_IDRP_INFO_MINLEN 1
#define ISIS_TLV_IPADDR 132 /* rfc1195 */
#define ISIS_TLV_IPAUTH 133 /* rfc1195 */
-#define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */
-#define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */
+#define ISIS_TLV_TE_ROUTER_ID 134 /* rfc5305 */
+#define ISIS_TLV_EXTD_IP_REACH 135 /* rfc5305 */
#define ISIS_TLV_HOSTNAME 137 /* rfc2763 */
#define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */
#define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */
{ ISIS_TLV_LSP, "LSP entries"},
{ ISIS_TLV_AUTH, "Authentication"},
{ ISIS_TLV_CHECKSUM, "Checksum"},
+ { ISIS_TLV_POI, "Purge Originator Identifier"},
{ ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"},
{ ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"},
{ ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"},
{ 0, NULL }
};
-#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */
+#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* rfc5305 */
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */
-#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */
-#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */
-#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */
-#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */
-#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */
+#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* rfc5305 */
+#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* rfc5305 */
#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */
#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */
-#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */
+#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* rfc5305 */
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */
#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */
#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */
};
struct isis_spb_mcid {
- uint8_t format_id;
- uint8_t name[32];
- uint8_t revision_lvl[2];
- uint8_t digest[16];
+ nd_uint8_t format_id;
+ nd_byte name[32];
+ nd_uint16_t revision_lvl;
+ nd_byte digest[16];
};
struct isis_subtlv_spb_mcid {
};
struct isis_subtlv_spb_instance {
- uint8_t cist_root_id[8];
- uint8_t cist_external_root_path_cost[4];
- uint8_t bridge_priority[2];
- uint8_t spsourceid[4];
- uint8_t no_of_trees;
+ nd_byte cist_root_id[8];
+ nd_uint32_t cist_external_root_path_cost;
+ nd_uint16_t bridge_priority;
+ nd_uint32_t spsourceid;
+ nd_uint8_t no_of_trees;
};
#define CLNP_SEGMENT_PART 0x80
{ 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)
-#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_LSP_OL_BIT(x) (EXTRACT_U_1(x)&0x4)
+#define ISIS_MASK_LSP_ISTYPE_BITS(x) (EXTRACT_U_1(x)&0x3)
+#define ISIS_MASK_LSP_PARTITION_BIT(x) (EXTRACT_U_1(x)&0x80)
+#define ISIS_MASK_LSP_ATT_BITS(x) (EXTRACT_U_1(x)&0x78)
+#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) (EXTRACT_U_1(x)&0x40)
+#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) (EXTRACT_U_1(x)&0x20)
+#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) (EXTRACT_U_1(x)&0x10)
+#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) (EXTRACT_U_1(x)&0x8)
#define ISIS_MASK_MTID(x) ((x)&0x0fff)
#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000)
#define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40)
#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20)
-#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_TLV_METRIC_SUPPORTED(x) (EXTRACT_U_1(x)&0x80)
+#define ISIS_LSP_TLV_METRIC_IE(x) (EXTRACT_U_1(x)&0x40)
+#define ISIS_LSP_TLV_METRIC_UPDOWN(x) (EXTRACT_U_1(x)&0x80)
+#define ISIS_LSP_TLV_METRIC_VALUE(x) (EXTRACT_U_1(x)&0x3f)
#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1)
};
struct isis_tlv_ptp_adj {
- uint8_t adjacency_state;
- uint8_t extd_local_circuit_id[4];
- uint8_t neighbor_sysid[SYSTEM_ID_LEN];
- uint8_t neighbor_extd_local_circuit_id[4];
+ nd_uint8_t adjacency_state;
+ nd_uint32_t extd_local_circuit_id;
+ nd_byte neighbor_sysid[SYSTEM_ID_LEN];
+ nd_uint32_t neighbor_extd_local_circuit_id;
};
-static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, uint16_t checksum,
- u_int checksum_offset, u_int length);
+static void osi_print_cksum(netdissect_options *, const uint8_t *pptr,
+ uint16_t checksum, int checksum_offset, u_int length);
static int clnp_print(netdissect_options *, const uint8_t *, u_int);
static void esis_print(netdissect_options *, const uint8_t *, u_int);
static int isis_print(netdissect_options *, const uint8_t *, u_int);
struct isis_metric_block {
- uint8_t metric_default;
- uint8_t metric_delay;
- uint8_t metric_expense;
- uint8_t metric_error;
+ nd_uint8_t metric_default;
+ nd_uint8_t metric_delay;
+ nd_uint8_t metric_expense;
+ nd_uint8_t metric_error;
};
struct isis_tlv_is_reach {
struct isis_metric_block isis_metric_block;
- uint8_t neighbor_nodeid[NODE_ID_LEN];
+ nd_byte neighbor_nodeid[NODE_ID_LEN];
};
struct isis_tlv_es_reach {
struct isis_metric_block isis_metric_block;
- uint8_t neighbor_sysid[SYSTEM_ID_LEN];
+ nd_byte neighbor_sysid[SYSTEM_ID_LEN];
};
struct isis_tlv_ip_reach {
struct isis_metric_block isis_metric_block;
- uint8_t prefix[4];
- uint8_t mask[4];
+ nd_ipv4 prefix;
+ nd_ipv4 mask;
};
static const struct tok isis_is_reach_virtual_values[] = {
};
struct isis_common_header {
- uint8_t nlpid;
- uint8_t fixed_len;
- uint8_t version; /* Protocol version */
- uint8_t id_length;
- uint8_t pdu_type; /* 3 MSbits are reserved */
- uint8_t pdu_version; /* Packet format version */
- uint8_t reserved;
- uint8_t max_area;
+ nd_uint8_t nlpid;
+ nd_uint8_t fixed_len;
+ nd_uint8_t version; /* Protocol version */
+ nd_uint8_t id_length;
+ nd_uint8_t pdu_type; /* 3 MSbits are reserved */
+ nd_uint8_t pdu_version; /* Packet format version */
+ nd_byte reserved;
+ nd_uint8_t max_area;
};
struct isis_iih_lan_header {
- uint8_t circuit_type;
- uint8_t source_id[SYSTEM_ID_LEN];
- uint8_t holding_time[2];
- uint8_t pdu_len[2];
- uint8_t priority;
- uint8_t lan_id[NODE_ID_LEN];
+ nd_uint8_t circuit_type;
+ nd_byte source_id[SYSTEM_ID_LEN];
+ nd_uint16_t holding_time;
+ nd_uint16_t pdu_len;
+ nd_uint8_t priority;
+ nd_byte lan_id[NODE_ID_LEN];
};
struct isis_iih_ptp_header {
- uint8_t circuit_type;
- uint8_t source_id[SYSTEM_ID_LEN];
- uint8_t holding_time[2];
- uint8_t pdu_len[2];
- uint8_t circuit_id;
+ nd_uint8_t circuit_type;
+ nd_byte source_id[SYSTEM_ID_LEN];
+ nd_uint16_t holding_time;
+ nd_uint16_t pdu_len;
+ nd_uint8_t circuit_id;
};
struct isis_lsp_header {
- uint8_t pdu_len[2];
- uint8_t remaining_lifetime[2];
- uint8_t lsp_id[LSP_ID_LEN];
- uint8_t sequence_number[4];
- uint8_t checksum[2];
- uint8_t typeblock;
+ nd_uint16_t pdu_len;
+ nd_uint16_t remaining_lifetime;
+ nd_byte lsp_id[LSP_ID_LEN];
+ nd_uint32_t sequence_number;
+ nd_uint16_t checksum;
+ nd_uint8_t typeblock;
};
struct isis_csnp_header {
- uint8_t pdu_len[2];
- uint8_t source_id[NODE_ID_LEN];
- uint8_t start_lsp_id[LSP_ID_LEN];
- uint8_t end_lsp_id[LSP_ID_LEN];
+ nd_uint16_t pdu_len;
+ nd_byte source_id[NODE_ID_LEN];
+ nd_byte start_lsp_id[LSP_ID_LEN];
+ nd_byte end_lsp_id[LSP_ID_LEN];
};
struct isis_psnp_header {
- uint8_t pdu_len[2];
- uint8_t source_id[NODE_ID_LEN];
+ nd_uint16_t pdu_len;
+ nd_byte source_id[NODE_ID_LEN];
};
struct isis_tlv_lsp {
- uint8_t remaining_lifetime[2];
- uint8_t lsp_id[LSP_ID_LEN];
- uint8_t sequence_number[4];
- uint8_t checksum[2];
+ nd_uint16_t remaining_lifetime;
+ nd_byte lsp_id[LSP_ID_LEN];
+ nd_uint32_t sequence_number;
+ nd_uint16_t checksum;
};
#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header))
#define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header))
#define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header))
-void isoclns_print(netdissect_options *ndo,
- const uint8_t *p, u_int length, u_int caplen)
+void
+isoclns_print(netdissect_options *ndo, const u_char *p, u_int length)
{
- if (caplen <= 1) { /* enough bytes on the wire ? */
- ND_PRINT((ndo, "|OSI"));
- return;
- }
+ ndo->ndo_protocol = "isoclns";
+ ND_TCHECK_1(p); /* enough bytes on the wire ? */
if (ndo->ndo_eflag)
- ND_PRINT((ndo, "OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", *p), *p));
+ ND_PRINT("OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", EXTRACT_U_1(p)), EXTRACT_U_1(p));
- switch (*p) {
+ switch (EXTRACT_U_1(p)) {
case NLPID_CLNP:
if (!clnp_print(ndo, p, length))
- print_unknown_data(ndo, p, "\n\t", caplen);
+ print_unknown_data(ndo, p, "\n\t", length);
break;
case NLPID_ESIS:
case NLPID_ISIS:
if (!isis_print(ndo, p, length))
- print_unknown_data(ndo, p, "\n\t", caplen);
+ print_unknown_data(ndo, p, "\n\t", length);
break;
case NLPID_NULLNS:
- ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
+ ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
break;
case NLPID_Q933:
default:
if (!ndo->ndo_eflag)
- ND_PRINT((ndo, "OSI NLPID 0x%02x unknown", *p));
- ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length));
- if (caplen > 1)
- print_unknown_data(ndo, p, "\n\t", caplen);
+ ND_PRINT("OSI NLPID 0x%02x unknown", EXTRACT_U_1(p));
+ ND_PRINT("%slength: %u", ndo->ndo_eflag ? "" : ", ", length);
+ if (length > 1)
+ print_unknown_data(ndo, p, "\n\t", length);
break;
}
+ return;
+trunc:
+ nd_print_trunc(ndo);
}
#define CLNP_PDU_ER 1
};
struct clnp_header_t {
- uint8_t nlpid;
- uint8_t length_indicator;
- uint8_t version;
- uint8_t lifetime; /* units of 500ms */
- uint8_t type;
- uint8_t segment_length[2];
- uint8_t cksum[2];
+ nd_uint8_t nlpid;
+ nd_uint8_t length_indicator;
+ nd_uint8_t version;
+ nd_uint8_t lifetime; /* units of 500ms */
+ nd_uint8_t type;
+ nd_uint16_t segment_length;
+ nd_uint16_t cksum;
};
struct clnp_segment_header_t {
- uint8_t data_unit_id[2];
- uint8_t segment_offset[2];
- uint8_t total_length[2];
+ nd_uint16_t data_unit_id;
+ nd_uint16_t segment_offset;
+ nd_uint16_t total_length;
};
/*
const uint8_t *pptr, u_int length)
{
const uint8_t *optr,*source_address,*dest_address;
- u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags;
+ u_int li,li_remaining,tlen,nsap_offset,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;
- uint8_t rfd_error_major,rfd_error_minor;
+ uint8_t rfd_error,rfd_error_major,rfd_error_minor;
+ ndo->ndo_protocol = "clnp";
clnp_header = (const struct clnp_header_t *) pptr;
- ND_TCHECK(*clnp_header);
+ ND_TCHECK_SIZE(clnp_header);
- li = clnp_header->length_indicator;
+ li = EXTRACT_U_1(clnp_header->length_indicator);
+ li_remaining = li;
optr = pptr;
if (!ndo->ndo_eflag)
- ND_PRINT((ndo, "CLNP"));
+ ND_PRINT("CLNP");
/*
* Sanity checking of the header.
*/
- if (clnp_header->version != CLNP_VERSION) {
- ND_PRINT((ndo, "version %d packet not supported", clnp_header->version));
+ if (EXTRACT_U_1(clnp_header->version) != CLNP_VERSION) {
+ ND_PRINT("version %u packet not supported", EXTRACT_U_1(clnp_header->version));
+ return (0);
+ }
+
+ if (li > length) {
+ ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
+ return (0);
+ }
+
+ if (li < sizeof(struct clnp_header_t)) {
+ ND_PRINT(" length indicator %u < min PDU size:", li);
+ while (pptr < ndo->ndo_snapend) {
+ ND_PRINT("%02X", EXTRACT_U_1(pptr));
+ pptr++;
+ }
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;
+ clnp_pdu_type = EXTRACT_U_1(clnp_header->type) & CLNP_PDU_TYPE_MASK;
+ clnp_flags = EXTRACT_U_1(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;
+ li_remaining -= sizeof(struct clnp_header_t);
- pptr += (1 + dest_address_length);
- li -= (1 + dest_address_length);
- source_address_length = *pptr;
- source_address = pptr +1;
+ if (li_remaining < 1) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ ND_TCHECK_1(pptr);
+ dest_address_length = EXTRACT_U_1(pptr);
+ pptr += 1;
+ li_remaining -= 1;
+ if (li_remaining < dest_address_length) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ ND_TCHECK_LEN(pptr, dest_address_length);
+ dest_address = pptr;
+ pptr += dest_address_length;
+ li_remaining -= dest_address_length;
- pptr += (1 + source_address_length);
- li -= (1 + source_address_length);
+ if (li_remaining < 1) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ ND_TCHECK_1(pptr);
+ source_address_length = EXTRACT_U_1(pptr);
+ pptr += 1;
+ li_remaining -= 1;
+ if (li_remaining < source_address_length) {
+ ND_PRINT("li < size of fixed part of CLNP header and addresses");
+ return (0);
+ }
+ ND_TCHECK_LEN(pptr, source_address_length);
+ source_address = pptr;
+ pptr += source_address_length;
+ li_remaining -= source_address_length;
if (ndo->ndo_vflag < 1) {
- ND_PRINT((ndo, "%s%s > %s, %s, length %u",
+ ND_PRINT("%s%s > %s, %s, length %u",
ndo->ndo_eflag ? "" : ", ",
- isonsap_string(source_address, source_address_length),
- isonsap_string(dest_address, dest_address_length),
+ isonsap_string(ndo, source_address, source_address_length),
+ isonsap_string(ndo, dest_address, dest_address_length),
tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type),
- length));
+ length);
return (1);
}
- ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
+ ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
- ND_PRINT((ndo, "\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x",
+ ND_PRINT("\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)));
+ EXTRACT_U_1(clnp_header->length_indicator),
+ EXTRACT_U_1(clnp_header->version),
+ EXTRACT_U_1(clnp_header->lifetime)/2,
+ (EXTRACT_U_1(clnp_header->lifetime)%2)*5,
+ EXTRACT_BE_U_2(clnp_header->segment_length),
+ EXTRACT_BE_U_2(clnp_header->cksum));
- osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7,
- clnp_header->length_indicator);
+ osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(clnp_header->cksum), 7,
+ EXTRACT_U_1(clnp_header->length_indicator));
- ND_PRINT((ndo, "\n\tFlags [%s]",
- bittok2str(clnp_flag_values, "none", clnp_flags)));
+ ND_PRINT("\n\tFlags [%s]",
+ bittok2str(clnp_flag_values, "none", clnp_flags));
- ND_PRINT((ndo, "\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
+ ND_PRINT("\n\tsource address (length %u): %s\n\tdest address (length %u): %s",
source_address_length,
- isonsap_string(source_address, source_address_length),
+ isonsap_string(ndo, source_address, source_address_length),
dest_address_length,
- isonsap_string(dest_address, dest_address_length)));
+ isonsap_string(ndo, dest_address, dest_address_length));
if (clnp_flags & CLNP_SEGMENT_PART) {
+ if (li_remaining < sizeof(struct clnp_segment_header_t)) {
+ ND_PRINT("li < size of fixed part of CLNP header, addresses, and segment part");
+ return (0);
+ }
clnp_segment_header = (const struct clnp_segment_header_t *) pptr;
- ND_TCHECK(*clnp_segment_header);
- ND_PRINT((ndo, "\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);
+ ND_TCHECK_SIZE(clnp_segment_header);
+ ND_PRINT("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u",
+ EXTRACT_BE_U_2(clnp_segment_header->data_unit_id),
+ EXTRACT_BE_U_2(clnp_segment_header->segment_offset),
+ EXTRACT_BE_U_2(clnp_segment_header->total_length));
+ pptr+=sizeof(struct clnp_segment_header_t);
+ li_remaining-=sizeof(struct clnp_segment_header_t);
}
/* now walk the options */
- while (li >= 2) {
+ while (li_remaining != 0) {
u_int op, opli;
const uint8_t *tptr;
- ND_TCHECK2(*pptr, 2);
- if (li < 2) {
- ND_PRINT((ndo, ", bad opts/li"));
+ if (li_remaining < 2) {
+ ND_PRINT(", bad opts/li");
return (0);
}
- op = *pptr++;
- opli = *pptr++;
- li -= 2;
- ND_TCHECK2(*pptr, opli);
- if (opli > li) {
- ND_PRINT((ndo, ", opt (%d) too long", op));
+ ND_TCHECK_2(pptr);
+ op = EXTRACT_U_1(pptr);
+ opli = EXTRACT_U_1(pptr + 1);
+ pptr += 2;
+ li_remaining -= 2;
+ if (opli > li_remaining) {
+ ND_PRINT(", opt (%u) too long", op);
return (0);
}
- li -= opli;
+ ND_TCHECK_LEN(pptr, opli);
+ li_remaining -= opli;
tptr = pptr;
tlen = opli;
- ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
+ ND_PRINT("\n\t %s Option #%u, length %u, value: ",
tok2str(clnp_option_values,"Unknown",op),
op,
- opli));
+ opli);
+ /*
+ * We've already checked that the entire option is present
+ * in the captured packet with the ND_TCHECK_LEN() call.
+ * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK_LEN()
+ * checks.
+ * We do, however, need to check tlen, to make sure we
+ * don't run past the end of the option.
+ */
switch (op) {
case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */
case CLNP_OPTION_SOURCE_ROUTING:
- ND_PRINT((ndo, "%s %s",
- tok2str(clnp_option_sr_rr_values,"Unknown",*tptr),
- tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op)));
- nsap_offset=*(tptr+1);
+ if (tlen < 2) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("%s %s",
+ tok2str(clnp_option_sr_rr_values,"Unknown",EXTRACT_U_1(tptr)),
+ tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op));
+ nsap_offset=EXTRACT_U_1(tptr + 1);
if (nsap_offset == 0) {
- ND_PRINT((ndo, " Bad NSAP offset (0)"));
+ ND_PRINT(" Bad NSAP offset (0)");
break;
}
nsap_offset-=1; /* offset to nsap list */
if (nsap_offset > tlen) {
- ND_PRINT((ndo, " Bad NSAP offset (past end of option)"));
+ ND_PRINT(" Bad NSAP offset (past end of option)");
break;
}
tptr+=nsap_offset;
tlen-=nsap_offset;
while (tlen > 0) {
- source_address_length=*tptr;
+ source_address_length=EXTRACT_U_1(tptr);
if (tlen < source_address_length+1) {
- ND_PRINT((ndo, "\n\t NSAP address goes past end of option"));
+ ND_PRINT("\n\t NSAP address goes past end of option");
break;
}
if (source_address_length > 0) {
source_address=(tptr+1);
- ND_TCHECK2(*source_address, source_address_length);
- ND_PRINT((ndo, "\n\t NSAP address (length %u): %s",
+ ND_TCHECK_LEN(source_address,
+ source_address_length);
+ ND_PRINT("\n\t NSAP address (length %u): %s",
source_address_length,
- isonsap_string(source_address, source_address_length)));
+ isonsap_string(ndo, source_address, source_address_length));
}
tlen-=source_address_length+1;
}
break;
case CLNP_OPTION_PRIORITY:
- ND_PRINT((ndo, "0x%1x", *tptr&0x0f));
+ if (tlen < 1) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("0x%1x", EXTRACT_U_1(tptr)&0x0f);
break;
case CLNP_OPTION_QOS_MAINTENANCE:
- ND_PRINT((ndo, "\n\t Format Code: %s",
- tok2str(clnp_option_scope_values, "Reserved", *tptr&CLNP_OPTION_SCOPE_MASK)));
+ if (tlen < 1) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("\n\t Format Code: %s",
+ tok2str(clnp_option_scope_values, "Reserved", EXTRACT_U_1(tptr) & CLNP_OPTION_SCOPE_MASK));
- if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
- ND_PRINT((ndo, "\n\t QoS Flags [%s]",
+ if ((EXTRACT_U_1(tptr)&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL)
+ ND_PRINT("\n\t QoS Flags [%s]",
bittok2str(clnp_option_qos_global_values,
"none",
- *tptr&CLNP_OPTION_OPTION_QOS_MASK)));
+ EXTRACT_U_1(tptr)&CLNP_OPTION_OPTION_QOS_MASK));
break;
case CLNP_OPTION_SECURITY:
- ND_PRINT((ndo, "\n\t Format Code: %s, Security-Level %u",
- tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK),
- *(tptr+1)));
+ if (tlen < 2) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ ND_PRINT("\n\t Format Code: %s, Security-Level %u",
+ tok2str(clnp_option_scope_values,"Reserved",EXTRACT_U_1(tptr)&CLNP_OPTION_SCOPE_MASK),
+ EXTRACT_U_1(tptr + 1));
break;
case CLNP_OPTION_DISCARD_REASON:
- rfd_error_major = (*tptr&0xf0) >> 4;
- rfd_error_minor = *tptr&0x0f;
- ND_PRINT((ndo, "\n\t Class: %s Error (0x%01x), %s (0x%01x)",
+ if (tlen < 1) {
+ ND_PRINT(", bad opt len");
+ return (0);
+ }
+ rfd_error = EXTRACT_U_1(tptr);
+ rfd_error_major = (rfd_error&0xf0) >> 4;
+ rfd_error_minor = rfd_error&0x0f;
+ ND_PRINT("\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));
+ rfd_error_minor);
break;
case CLNP_OPTION_PADDING:
- ND_PRINT((ndo, "padding data"));
+ ND_PRINT("padding data");
break;
/*
case CLNP_PDU_ER: /* fall through */
case CLNP_PDU_ERP:
- ND_TCHECK(*pptr);
- if (*(pptr) == NLPID_CLNP) {
- ND_PRINT((ndo, "\n\t-----original packet-----\n\t"));
+ ND_TCHECK_1(pptr);
+ if (EXTRACT_U_1(pptr) == NLPID_CLNP) {
+ ND_PRINT("\n\t-----original packet-----\n\t");
/* FIXME recursion protection */
- clnp_print(ndo, pptr, length - clnp_header->length_indicator);
+ clnp_print(ndo, pptr, length - li);
break;
}
+ /* The cases above break from the switch block if they see and print
+ * a CLNP header in the Data part. For an Error Report PDU this is
+ * described in Section 7.9.6 of ITU X.233 (1997 E), also known as
+ * ISO/IEC 8473-1:1998(E). It is not clear why in this code the same
+ * applies to an Echo Response PDU, as the standard does not specify
+ * the contents -- could be a proprietary extension or a bug. In either
+ * case, if the Data part does not contain a CLNP header, its structure
+ * is considered unknown and the decoding falls through to print the
+ * contents as-is.
+ */
+ ND_FALL_THROUGH;
+
case CLNP_PDU_DT:
case CLNP_PDU_MD:
case CLNP_PDU_ERQ:
default:
/* dump the PDU specific data */
if (length-(pptr-optr) > 0) {
- ND_PRINT((ndo, "\n\t undecoded non-header data, length %u", length-clnp_header->length_indicator));
+ ND_PRINT("\n\t undecoded non-header data, length %u", length-li);
print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr));
}
}
return (1);
trunc:
- ND_PRINT((ndo, "[|clnp]"));
+ nd_print_trunc(ndo);
return (1);
}
};
struct esis_header_t {
- uint8_t nlpid;
- uint8_t length_indicator;
- uint8_t version;
- uint8_t reserved;
- uint8_t type;
- uint8_t holdtime[2];
- uint8_t cksum[2];
+ nd_uint8_t nlpid;
+ nd_uint8_t length_indicator;
+ nd_uint8_t version;
+ nd_byte reserved;
+ nd_uint8_t type;
+ nd_uint16_t holdtime;
+ nd_uint16_t cksum;
};
static void
const uint8_t *pptr, u_int length)
{
const uint8_t *optr;
- u_int li,esis_pdu_type,source_address_length, source_address_number;
+ u_int li, version, esis_pdu_type, source_address_length, source_address_number;
const struct esis_header_t *esis_header;
+ ndo->ndo_protocol = "esis";
if (!ndo->ndo_eflag)
- ND_PRINT((ndo, "ES-IS"));
+ ND_PRINT("ES-IS");
if (length <= 2) {
- ND_PRINT((ndo, ndo->ndo_qflag ? "bad pkt!" : "no header at all!"));
+ ND_PRINT(ndo->ndo_qflag ? "bad pkt!" : "no header at all!");
return;
}
esis_header = (const struct esis_header_t *) pptr;
- ND_TCHECK(*esis_header);
- li = esis_header->length_indicator;
+ ND_TCHECK_SIZE(esis_header);
+ li = EXTRACT_U_1(esis_header->length_indicator);
optr = pptr;
/*
* Sanity checking of the header.
*/
- if (esis_header->nlpid != NLPID_ESIS) {
- ND_PRINT((ndo, " nlpid 0x%02x packet not supported", esis_header->nlpid));
+ if (EXTRACT_U_1(esis_header->nlpid) != NLPID_ESIS) {
+ ND_PRINT(" nlpid 0x%02x packet not supported", EXTRACT_U_1(esis_header->nlpid));
return;
}
- if (esis_header->version != ESIS_VERSION) {
- ND_PRINT((ndo, " version %d packet not supported", esis_header->version));
+ version = EXTRACT_U_1(esis_header->version);
+ if (version != ESIS_VERSION) {
+ ND_PRINT(" version %u packet not supported", version);
return;
}
if (li > length) {
- ND_PRINT((ndo, " length indicator(%d) > PDU size (%d)!", li, length));
+ ND_PRINT(" length indicator(%u) > PDU size (%u)!", li, length);
return;
}
if (li < sizeof(struct esis_header_t) + 2) {
- ND_PRINT((ndo, " length indicator < min PDU size %d:", li));
- while (pptr < ndo->ndo_snapend)
- ND_PRINT((ndo, "%02X", *pptr++));
+ ND_PRINT(" length indicator %u < min PDU size:", li);
+ while (pptr < ndo->ndo_snapend) {
+ ND_PRINT("%02X", EXTRACT_U_1(pptr));
+ pptr++;
+ }
return;
}
- esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK;
+ esis_pdu_type = EXTRACT_U_1(esis_header->type) & ESIS_PDU_TYPE_MASK;
if (ndo->ndo_vflag < 1) {
- ND_PRINT((ndo, "%s%s, length %u",
+ ND_PRINT("%s%s, length %u",
ndo->ndo_eflag ? "" : ", ",
tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type),
- length));
+ length);
return;
} else
- ND_PRINT((ndo, "%slength %u\n\t%s (%u)",
+ ND_PRINT("%slength %u\n\t%s (%u)",
ndo->ndo_eflag ? "" : ", ",
length,
tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type),
- esis_pdu_type));
+ esis_pdu_type);
- ND_PRINT((ndo, ", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ));
- ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)));
+ ND_PRINT(", v: %u%s", version, version == ESIS_VERSION ? "" : "unsupported" );
+ ND_PRINT(", checksum: 0x%04x", EXTRACT_BE_U_2(esis_header->cksum));
- osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li);
+ osi_print_cksum(ndo, pptr, EXTRACT_BE_U_2(esis_header->cksum), 7,
+ li);
- ND_PRINT((ndo, ", holding time: %us, length indicator: %u",
- EXTRACT_16BITS(esis_header->holdtime), li));
+ ND_PRINT(", holding time: %us, length indicator: %u",
+ EXTRACT_BE_U_2(esis_header->holdtime), li);
if (ndo->ndo_vflag > 1)
print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t));
const uint8_t *dst, *snpa, *neta;
u_int dstl, snpal, netal;
- ND_TCHECK(*pptr);
+ ND_TCHECK_1(pptr);
if (li < 1) {
- ND_PRINT((ndo, ", bad redirect/li"));
+ ND_PRINT(", bad redirect/li");
return;
}
- dstl = *pptr;
+ dstl = EXTRACT_U_1(pptr);
pptr++;
li--;
- ND_TCHECK2(*pptr, dstl);
+ ND_TCHECK_LEN(pptr, dstl);
if (li < dstl) {
- ND_PRINT((ndo, ", bad redirect/li"));
+ ND_PRINT(", bad redirect/li");
return;
}
dst = pptr;
pptr += dstl;
li -= dstl;
- ND_PRINT((ndo, "\n\t %s", isonsap_string(dst, dstl)));
+ ND_PRINT("\n\t %s", isonsap_string(ndo, dst, dstl));
- ND_TCHECK(*pptr);
+ ND_TCHECK_1(pptr);
if (li < 1) {
- ND_PRINT((ndo, ", bad redirect/li"));
+ ND_PRINT(", bad redirect/li");
return;
}
- snpal = *pptr;
+ snpal = EXTRACT_U_1(pptr);
pptr++;
li--;
- ND_TCHECK2(*pptr, snpal);
+ ND_TCHECK_LEN(pptr, snpal);
if (li < snpal) {
- ND_PRINT((ndo, ", bad redirect/li"));
+ ND_PRINT(", bad redirect/li");
return;
}
snpa = pptr;
pptr += snpal;
li -= snpal;
- ND_TCHECK(*pptr);
+ ND_TCHECK_1(pptr);
if (li < 1) {
- ND_PRINT((ndo, ", bad redirect/li"));
+ ND_PRINT(", bad redirect/li");
return;
}
- netal = *pptr;
+ netal = EXTRACT_U_1(pptr);
pptr++;
- ND_TCHECK2(*pptr, netal);
+ ND_TCHECK_LEN(pptr, netal);
if (li < netal) {
- ND_PRINT((ndo, ", bad redirect/li"));
+ ND_PRINT(", bad redirect/li");
return;
}
neta = pptr;
pptr += netal;
li -= netal;
- if (netal == 0)
- ND_PRINT((ndo, "\n\t %s", etheraddr_string(ndo, snpa)));
+ if (snpal == 6)
+ ND_PRINT("\n\t SNPA (length: %u): %s",
+ snpal,
+ etheraddr_string(ndo, snpa));
else
- ND_PRINT((ndo, "\n\t %s", isonsap_string(neta, netal)));
+ ND_PRINT("\n\t SNPA (length: %u): %s",
+ snpal,
+ linkaddr_string(ndo, snpa, LINKADDR_OTHER, snpal));
+ if (netal != 0)
+ ND_PRINT("\n\t NET (length: %u) %s",
+ netal,
+ isonsap_string(ndo, neta, netal));
break;
}
case ESIS_PDU_ESH:
- ND_TCHECK(*pptr);
+ ND_TCHECK_1(pptr);
if (li < 1) {
- ND_PRINT((ndo, ", bad esh/li"));
+ ND_PRINT(", bad esh/li");
return;
}
- source_address_number = *pptr;
+ source_address_number = EXTRACT_U_1(pptr);
pptr++;
li--;
- ND_PRINT((ndo, "\n\t Number of Source Addresses: %u", source_address_number));
+ ND_PRINT("\n\t Number of Source Addresses: %u", source_address_number);
while (source_address_number > 0) {
- ND_TCHECK(*pptr);
+ ND_TCHECK_1(pptr);
if (li < 1) {
- ND_PRINT((ndo, ", bad esh/li"));
+ ND_PRINT(", bad esh/li");
return;
}
- source_address_length = *pptr;
+ source_address_length = EXTRACT_U_1(pptr);
pptr++;
li--;
- ND_TCHECK2(*pptr, source_address_length);
+ ND_TCHECK_LEN(pptr, source_address_length);
if (li < source_address_length) {
- ND_PRINT((ndo, ", bad esh/li"));
+ ND_PRINT(", bad esh/li");
return;
}
- ND_PRINT((ndo, "\n\t NET (length: %u): %s",
+ ND_PRINT("\n\t NET (length: %u): %s",
source_address_length,
- isonsap_string(pptr, source_address_length)));
+ isonsap_string(ndo, pptr, source_address_length));
pptr += source_address_length;
li -= source_address_length;
source_address_number--;
break;
case ESIS_PDU_ISH: {
- ND_TCHECK(*pptr);
+ ND_TCHECK_1(pptr);
if (li < 1) {
- ND_PRINT((ndo, ", bad ish/li"));
+ ND_PRINT(", bad ish/li");
return;
}
- source_address_length = *pptr;
+ source_address_length = EXTRACT_U_1(pptr);
pptr++;
li--;
- ND_TCHECK2(*pptr, source_address_length);
+ ND_TCHECK_LEN(pptr, source_address_length);
if (li < source_address_length) {
- ND_PRINT((ndo, ", bad ish/li"));
+ ND_PRINT(", bad ish/li");
return;
}
- ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)));
+ ND_PRINT("\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length));
pptr += source_address_length;
li -= source_address_length;
break;
const uint8_t *tptr;
if (li < 2) {
- ND_PRINT((ndo, ", bad opts/li"));
+ ND_PRINT(", bad opts/li");
return;
}
- ND_TCHECK2(*pptr, 2);
- op = *pptr++;
- opli = *pptr++;
+ ND_TCHECK_2(pptr);
+ op = EXTRACT_U_1(pptr);
+ opli = EXTRACT_U_1(pptr + 1);
+ pptr += 2;
li -= 2;
if (opli > li) {
- ND_PRINT((ndo, ", opt (%d) too long", op));
+ ND_PRINT(", opt (%u) too long", op);
return;
}
li -= opli;
tptr = pptr;
- ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ",
+ ND_PRINT("\n\t %s Option #%u, length %u, value: ",
tok2str(esis_option_values,"Unknown",op),
op,
- opli));
+ opli);
switch (op) {
case ESIS_OPTION_ES_CONF_TIME:
if (opli == 2) {
- ND_TCHECK2(*pptr, 2);
- ND_PRINT((ndo, "%us", EXTRACT_16BITS(tptr)));
+ ND_TCHECK_2(pptr);
+ ND_PRINT("%us", EXTRACT_BE_U_2(tptr));
} else
- ND_PRINT((ndo, "(bad length)"));
+ ND_PRINT("(bad length)");
break;
case ESIS_OPTION_PROTOCOLS:
while (opli>0) {
- ND_TCHECK(*pptr);
- ND_PRINT((ndo, "%s (0x%02x)",
+ ND_TCHECK_1(tptr);
+ ND_PRINT("%s (0x%02x)",
tok2str(nlpid_values,
"unknown",
- *tptr),
- *tptr));
+ EXTRACT_U_1(tptr)),
+ EXTRACT_U_1(tptr));
if (opli>1) /* further NPLIDs ? - put comma */
- ND_PRINT((ndo, ", "));
+ ND_PRINT(", ");
tptr++;
opli--;
}
print_unknown_data(ndo, pptr, "\n\t ", opli);
pptr += opli;
}
+ return;
+
trunc:
- return;
+ nd_print_trunc(ndo);
}
static void
{
int i;
- ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id));
+ ND_TCHECK_SIZE(mcid);
+ ND_PRINT("ID: %u, Name: ", EXTRACT_U_1(mcid->format_id));
- for(i=0; i<32; i++)
- {
- ND_PRINT((ndo, "%c", mcid->name[i]));
- if(mcid->name[i] == '\0')
- break;
- }
+ if (nd_printzp(ndo, mcid->name, 32, ndo->ndo_snapend))
+ goto trunc;
- ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl)));
+ ND_PRINT("\n\t Lvl: %u", EXTRACT_BE_U_2(mcid->revision_lvl));
- ND_PRINT((ndo, ", Digest: "));
+ ND_PRINT(", Digest: ");
for(i=0;i<16;i++)
- ND_PRINT((ndo, "%.2x ", mcid->digest[i]));
+ ND_PRINT("%.2x ", mcid->digest[i]);
+ return;
+
+trunc:
+ nd_print_trunc(ndo);
}
static int
isis_print_mt_port_cap_subtlv(netdissect_options *ndo,
- const uint8_t *tptr, int len)
+ const uint8_t *tptr, u_int len)
{
- int stlv_type, stlv_len;
+ u_int stlv_type, stlv_len;
const struct isis_subtlv_spb_mcid *subtlv_spb_mcid;
int i;
- while (len > 0)
+ while (len > 2)
{
- stlv_type = *(tptr++);
- stlv_len = *(tptr++);
+ ND_TCHECK_2(tptr);
+ stlv_type = EXTRACT_U_1(tptr);
+ stlv_len = EXTRACT_U_1(tptr + 1);
/* first lets see if we know the subTLVs name*/
- ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
+ ND_PRINT("\n\t %s subTLV #%u, length: %u",
tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type),
stlv_type,
- stlv_len));
+ stlv_len);
+ tptr = tptr + 2;
/*len -= TLV_TYPE_LEN_OFFSET;*/
- len = len -2;
+ len = len - 2;
+
+ /* Make sure the subTLV fits within the space left */
+ if (len < stlv_len)
+ goto trunc;
+ /* Make sure the entire subTLV is in the captured data */
+ ND_TCHECK_LEN(tptr, stlv_len);
switch (stlv_type)
{
case ISIS_SUBTLV_SPB_MCID:
{
- if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN))
- goto trunctlv;
+ if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN)
+ goto trunc;
- subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr;
+ subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr;
- ND_PRINT((ndo, "\n\t MCID: "));
+ ND_PRINT("\n\t MCID: ");
isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid));
/*tptr += SPB_MCID_MIN_LEN;
len -= SPB_MCID_MIN_LEN; */
- ND_PRINT((ndo, "\n\t AUX-MCID: "));
+ ND_PRINT("\n\t AUX-MCID: ");
isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid));
/*tptr += SPB_MCID_MIN_LEN;
len -= SPB_MCID_MIN_LEN; */
- tptr = tptr + sizeof(struct isis_subtlv_spb_mcid);
- len = len - sizeof(struct isis_subtlv_spb_mcid);
+ tptr = tptr + ISIS_SUBTLV_SPB_MCID_MIN_LEN;
+ len = len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
+ stlv_len = stlv_len - ISIS_SUBTLV_SPB_MCID_MIN_LEN;
break;
}
case ISIS_SUBTLV_SPB_DIGEST:
{
- if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN))
- goto trunctlv;
+ if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)
+ goto trunc;
- ND_PRINT((ndo, "\n\t RES: %d V: %d A: %d D: %d",
- (*(tptr) >> 5), (((*tptr)>> 4) & 0x01),
- ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)));
+ ND_PRINT("\n\t RES: %u V: %u A: %u D: %u",
+ (EXTRACT_U_1(tptr) >> 5),
+ ((EXTRACT_U_1(tptr) >> 4) & 0x01),
+ ((EXTRACT_U_1(tptr) >> 2) & 0x03),
+ (EXTRACT_U_1(tptr) & 0x03));
tptr++;
- ND_PRINT((ndo, "\n\t Digest: "));
+ ND_PRINT("\n\t Digest: ");
for(i=1;i<=8; i++)
{
- ND_PRINT((ndo, "%08x ", EXTRACT_32BITS(tptr)));
+ ND_PRINT("%08x ", EXTRACT_BE_U_4(tptr));
if (i%4 == 0 && i != 8)
- ND_PRINT((ndo, "\n\t "));
+ ND_PRINT("\n\t ");
tptr = tptr + 4;
}
len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
+ stlv_len = stlv_len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN;
break;
}
case ISIS_SUBTLV_SPB_BVID:
{
- if (!ND_TTEST2(*(tptr), stlv_len))
- goto trunctlv;
-
- while (len)
+ while (stlv_len >= ISIS_SUBTLV_SPB_BVID_MIN_LEN)
{
- if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN))
- goto trunctlv;
-
- ND_PRINT((ndo, "\n\t ECT: %08x",
- EXTRACT_32BITS(tptr)));
+ ND_PRINT("\n\t ECT: %08x",
+ EXTRACT_BE_U_4(tptr));
tptr = tptr+4;
- ND_PRINT((ndo, " BVID: %d, U:%01x M:%01x ",
- (EXTRACT_16BITS (tptr) >> 4) ,
- (EXTRACT_16BITS (tptr) >> 3) & 0x01,
- (EXTRACT_16BITS (tptr) >> 2) & 0x01));
+ ND_PRINT(" BVID: %u, U:%01x M:%01x ",
+ (EXTRACT_BE_U_2(tptr) >> 4) ,
+ (EXTRACT_BE_U_2(tptr) >> 3) & 0x01,
+ (EXTRACT_BE_U_2(tptr) >> 2) & 0x01);
tptr = tptr + 2;
len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
+ stlv_len = stlv_len - ISIS_SUBTLV_SPB_BVID_MIN_LEN;
}
break;
}
default:
- break;
+ break;
}
+ tptr += stlv_len;
+ len -= stlv_len;
}
return 0;
- trunctlv:
- ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
+ trunc:
+ nd_print_trunc(ndo);
return(1);
}
static int
isis_print_mt_capability_subtlv(netdissect_options *ndo,
- const uint8_t *tptr, int len)
+ const uint8_t *tptr, u_int len)
{
- int stlv_type, stlv_len, tmp;
+ u_int stlv_type, stlv_len, tmp;
- while (len > 0)
+ while (len > 2)
{
- stlv_type = *(tptr++);
- stlv_len = *(tptr++);
+ ND_TCHECK_2(tptr);
+ stlv_type = EXTRACT_U_1(tptr);
+ stlv_len = EXTRACT_U_1(tptr + 1);
+ tptr = tptr + 2;
+ len = len - 2;
/* first lets see if we know the subTLVs name*/
- ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u",
+ ND_PRINT("\n\t %s subTLV #%u, length: %u",
tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type),
stlv_type,
- stlv_len));
+ stlv_len);
- len = len - 2;
+ /* Make sure the subTLV fits within the space left */
+ if (len < stlv_len)
+ goto trunc;
+ /* Make sure the entire subTLV is in the captured data */
+ ND_TCHECK_LEN(tptr, stlv_len);
switch (stlv_type)
{
case ISIS_SUBTLV_SPB_INSTANCE:
+ if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)
+ goto trunc;
- if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN))
- goto trunctlv;
-
- ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)));
+ ND_PRINT("\n\t CIST Root-ID: %08x", EXTRACT_BE_U_4(tptr));
tptr = tptr+4;
- ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tptr)));
+ ND_PRINT(" %08x", EXTRACT_BE_U_4(tptr));
tptr = tptr+4;
- ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_32BITS(tptr)));
+ ND_PRINT(", Path Cost: %08x", EXTRACT_BE_U_4(tptr));
tptr = tptr+4;
- ND_PRINT((ndo, ", Prio: %d", EXTRACT_16BITS(tptr)));
+ ND_PRINT(", Prio: %u", EXTRACT_BE_U_2(tptr));
tptr = tptr + 2;
- ND_PRINT((ndo, "\n\t RES: %d",
- EXTRACT_16BITS(tptr) >> 5));
- ND_PRINT((ndo, ", V: %d",
- (EXTRACT_16BITS(tptr) >> 4) & 0x0001));
- ND_PRINT((ndo, ", SPSource-ID: %d",
- (EXTRACT_32BITS(tptr) & 0x000fffff)));
+ ND_PRINT("\n\t RES: %u",
+ EXTRACT_BE_U_2(tptr) >> 5);
+ ND_PRINT(", V: %u",
+ (EXTRACT_BE_U_2(tptr) >> 4) & 0x0001);
+ ND_PRINT(", SPSource-ID: %u",
+ (EXTRACT_BE_U_4(tptr) & 0x000fffff));
tptr = tptr+4;
- ND_PRINT((ndo, ", No of Trees: %x", *(tptr)));
+ ND_PRINT(", No of Trees: %x", EXTRACT_U_1(tptr));
- tmp = *(tptr++);
+ tmp = EXTRACT_U_1(tptr);
+ tptr++;
len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
+ stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN;
while (tmp)
{
- if (!ND_TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN))
- goto trunctlv;
+ if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)
+ goto trunc;
- ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d",
- *(tptr) >> 7, (*(tptr) >> 6) & 0x01,
- (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)));
+ ND_PRINT("\n\t U:%u, M:%u, A:%u, RES:%u",
+ EXTRACT_U_1(tptr) >> 7,
+ (EXTRACT_U_1(tptr) >> 6) & 0x01,
+ (EXTRACT_U_1(tptr) >> 5) & 0x01,
+ (EXTRACT_U_1(tptr) & 0x1f));
tptr++;
- ND_PRINT((ndo, ", ECT: %08x", EXTRACT_32BITS(tptr)));
+ ND_PRINT(", ECT: %08x", EXTRACT_BE_U_4(tptr));
tptr = tptr + 4;
- ND_PRINT((ndo, ", BVID: %d, SPVID: %d",
- (EXTRACT_24BITS(tptr) >> 12) & 0x000fff,
- EXTRACT_24BITS(tptr) & 0x000fff));
+ ND_PRINT(", BVID: %u, SPVID: %u",
+ (EXTRACT_BE_U_3(tptr) >> 12) & 0x000fff,
+ EXTRACT_BE_U_3(tptr) & 0x000fff);
tptr = tptr + 3;
len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
+ stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN;
tmp--;
}
break;
case ISIS_SUBTLV_SPBM_SI:
+ if (stlv_len < 8)
+ goto trunc;
- if (!ND_TTEST2(*(tptr), 6))
- goto trunctlv;
-
- ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr)));
+ ND_PRINT("\n\t BMAC: %08x", EXTRACT_BE_U_4(tptr));
tptr = tptr+4;
- ND_PRINT((ndo, "%04x", EXTRACT_16BITS(tptr)));
+ ND_PRINT("%04x", EXTRACT_BE_U_2(tptr));
tptr = tptr+2;
- ND_PRINT((ndo, ", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12,
- (EXTRACT_16BITS(tptr)) & 0x0fff));
+ ND_PRINT(", RES: %u, VID: %u", EXTRACT_BE_U_2(tptr) >> 12,
+ (EXTRACT_BE_U_2(tptr)) & 0x0fff);
tptr = tptr+2;
len = len - 8;
stlv_len = stlv_len - 8;
- while (stlv_len)
- {
- ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d",
- (EXTRACT_32BITS(tptr) >> 31),
- (EXTRACT_32BITS(tptr) >> 30) & 0x01,
- (EXTRACT_32BITS(tptr) >> 24) & 0x03f,
- (EXTRACT_32BITS(tptr)) & 0x0ffffff));
+ while (stlv_len >= 4) {
+ ND_TCHECK_4(tptr);
+ ND_PRINT("\n\t T: %u, R: %u, RES: %u, ISID: %u",
+ (EXTRACT_BE_U_4(tptr) >> 31),
+ (EXTRACT_BE_U_4(tptr) >> 30) & 0x01,
+ (EXTRACT_BE_U_4(tptr) >> 24) & 0x03f,
+ (EXTRACT_BE_U_4(tptr)) & 0x0ffffff);
tptr = tptr + 4;
len = len - 4;
default:
break;
}
+ tptr += stlv_len;
+ len -= stlv_len;
}
return 0;
- trunctlv:
- ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
+ trunc:
+ nd_print_trunc(ndo);
return(1);
}
/* shared routine for printing system, node and lsp-ids */
static char *
-isis_print_id(const uint8_t *cp, int id_len)
+isis_print_id(const uint8_t *cp, u_int id_len)
{
- int i;
+ u_int i;
static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")];
char *pos = id;
-
- for (i = 1; i <= SYSTEM_ID_LEN; i++) {
- snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++);
+ u_int sysid_len;
+
+ sysid_len = SYSTEM_ID_LEN;
+ if (sysid_len > id_len)
+ sysid_len = id_len;
+ for (i = 1; i <= sysid_len; i++) {
+ nd_snprintf(pos, sizeof(id) - (pos - id), "%02x", EXTRACT_U_1(cp));
+ cp++;
pos += strlen(pos);
if (i == 2 || i == 4)
*pos++ = '.';
}
if (id_len >= NODE_ID_LEN) {
- snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++);
+ nd_snprintf(pos, sizeof(id) - (pos - id), ".%02x", EXTRACT_U_1(cp));
+ cp++;
pos += strlen(pos);
}
if (id_len == LSP_ID_LEN)
- snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp);
+ nd_snprintf(pos, sizeof(id) - (pos - id), "-%02x", EXTRACT_U_1(cp));
return (id);
}
isis_print_metric_block(netdissect_options *ndo,
const struct isis_metric_block *isis_metric_block)
{
- ND_PRINT((ndo, ", Default Metric: %d, %s",
+ ND_PRINT(", Default Metric: %u, %s",
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default),
- ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal");
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay))
- ND_PRINT((ndo, "\n\t\t Delay Metric: %d, %s",
+ ND_PRINT("\n\t\t Delay Metric: %u, %s",
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay),
- ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal");
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense))
- ND_PRINT((ndo, "\n\t\t Expense Metric: %d, %s",
+ ND_PRINT("\n\t\t Expense Metric: %u, %s",
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense),
- ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal");
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error))
- ND_PRINT((ndo, "\n\t\t Error Metric: %d, %s",
+ ND_PRINT("\n\t\t Error Metric: %u, %s",
ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error),
- ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal");
return(1); /* everything is ok */
}
static int
isis_print_tlv_ip_reach(netdissect_options *ndo,
- const uint8_t *cp, const char *ident, int length)
+ const uint8_t *cp, const char *ident, u_int length)
{
int prefix_len;
const struct isis_tlv_ip_reach *tlv_ip_reach;
while (length > 0) {
if ((size_t)length < sizeof(*tlv_ip_reach)) {
- ND_PRINT((ndo, "short IPv4 Reachability (%d vs %lu)",
+ ND_PRINT("short IPv4 Reachability (%u vs %lu)",
length,
- (unsigned long)sizeof(*tlv_ip_reach)));
+ (unsigned long)sizeof(*tlv_ip_reach));
return (0);
}
- if (!ND_TTEST(*tlv_ip_reach))
+ if (!ND_TTEST_SIZE(tlv_ip_reach))
return (0);
- prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask));
+ prefix_len = mask2plen(EXTRACT_IPV4_TO_HOST_ORDER(tlv_ip_reach->mask));
if (prefix_len == -1)
- ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s",
+ ND_PRINT("%sIPv4 prefix: %s mask %s",
ident,
ipaddr_string(ndo, (tlv_ip_reach->prefix)),
- ipaddr_string(ndo, (tlv_ip_reach->mask))));
+ ipaddr_string(ndo, (tlv_ip_reach->mask)));
else
- ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
+ ND_PRINT("%sIPv4 prefix: %15s/%u",
ident,
ipaddr_string(ndo, (tlv_ip_reach->prefix)),
- prefix_len));
+ prefix_len);
- ND_PRINT((ndo, ", Distribution: %s, Metric: %u, %s",
+ ND_PRINT(", Distribution: %s, Metric: %u, %s",
ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up",
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default),
- ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal");
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay))
- ND_PRINT((ndo, "%s Delay Metric: %u, %s",
+ ND_PRINT("%s Delay Metric: %u, %s",
ident,
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay),
- ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal");
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense))
- ND_PRINT((ndo, "%s Expense Metric: %u, %s",
+ ND_PRINT("%s Expense Metric: %u, %s",
ident,
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense),
- ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal");
if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error))
- ND_PRINT((ndo, "%s Error Metric: %u, %s",
+ ND_PRINT("%s Error Metric: %u, %s",
ident,
ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error),
- ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"));
+ ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal");
length -= sizeof(struct isis_tlv_ip_reach);
tlv_ip_reach++;
static int
isis_print_ip_reach_subtlv(netdissect_options *ndo,
- const uint8_t *tptr, int subt, int subl,
+ const uint8_t *tptr, u_int subt, u_int subl,
const char *ident)
{
- /* first lets see if we know the subTLVs name*/
- ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
- ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
- subt, subl));
+ /* first lets see if we know the subTLVs name*/
+ ND_PRINT("%s%s subTLV #%u, length: %u",
+ ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt),
+ subt, subl);
- if (!ND_TTEST2(*tptr,subl))
- goto trunctlv;
+ ND_TCHECK_LEN(tptr, subl);
switch(subt) {
case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */
case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32:
while (subl >= 4) {
- ND_PRINT((ndo, ", 0x%08x (=%u)",
- EXTRACT_32BITS(tptr),
- EXTRACT_32BITS(tptr)));
+ ND_PRINT(", 0x%08x (=%u)",
+ EXTRACT_BE_U_4(tptr),
+ EXTRACT_BE_U_4(tptr));
tptr+=4;
subl-=4;
}
break;
case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64:
while (subl >= 8) {
- ND_PRINT((ndo, ", 0x%08x%08x",
- EXTRACT_32BITS(tptr),
- EXTRACT_32BITS(tptr+4)));
+ ND_PRINT(", 0x%08x%08x",
+ EXTRACT_BE_U_4(tptr),
+ EXTRACT_BE_U_4(tptr + 4));
tptr+=8;
subl-=8;
}
}
return(1);
-trunctlv:
- ND_PRINT((ndo, "%spacket exceeded snapshot", ident));
- return(0);
-}
-
-/*
- * this is the common IS-REACH subTLV decoder it is called
- * from isis_print_ext_is_reach()
- */
-
-static int
-isis_print_is_reach_subtlv(netdissect_options *ndo,
- const uint8_t *tptr, u_int subt, u_int subl,
- const char *ident)
-{
- u_int te_class,priority_level,gmpls_switch_cap;
- union { /* int to float conversion buffer for several subTLVs */
- float f;
- uint32_t i;
- } bw;
-
- /* first lets see if we know the subTLVs name*/
- ND_PRINT((ndo, "%s%s subTLV #%u, length: %u",
- ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt),
- subt, subl));
-
- if (!ND_TTEST2(*tptr,subl))
- goto trunctlv;
-
- switch(subt) {
- 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:
- if (subl >= 4) {
- ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr)));
- if (subl == 8) /* rfc4205 */
- ND_PRINT((ndo, ", 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:
- if (subl >= sizeof(struct in_addr))
- ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr)));
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
- case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
- if (subl >= 4) {
- bw.i = EXTRACT_32BITS(tptr);
- ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000));
- }
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
- if (subl >= 32) {
- for (te_class = 0; te_class < 8; te_class++) {
- bw.i = EXTRACT_32BITS(tptr);
- ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps",
- ident,
- te_class,
- bw.f * 8 / 1000000));
- tptr+=4;
- }
- }
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
- case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
- ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)",
- ident,
- tok2str(diffserv_te_bc_values, "unknown", *tptr),
- *tptr));
- tptr++;
- /* decode BCs until the subTLV ends */
- for (te_class = 0; te_class < (subl-1)/4; te_class++) {
- bw.i = EXTRACT_32BITS(tptr);
- ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps",
- ident,
- te_class,
- bw.f * 8 / 1000000));
- tptr+=4;
- }
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
- if (subl >= 3)
- ND_PRINT((ndo, ", %u", EXTRACT_24BITS(tptr)));
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
- if (subl == 2) {
- ND_PRINT((ndo, ", [ %s ] (0x%04x)",
- bittok2str(isis_subtlv_link_attribute_values,
- "Unknown",
- EXTRACT_16BITS(tptr)),
- EXTRACT_16BITS(tptr)));
- }
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
- if (subl >= 2) {
- ND_PRINT((ndo, ", %s, Priority %u",
- bittok2str(gmpls_link_prot_values, "none", *tptr),
- *(tptr+1)));
- }
- break;
- case ISIS_SUBTLV_SPB_METRIC:
- if (subl >= 6) {
- ND_PRINT((ndo, ", LM: %u", EXTRACT_24BITS(tptr)));
- tptr=tptr+3;
- ND_PRINT((ndo, ", P: %u", *(tptr)));
- tptr++;
- ND_PRINT((ndo, ", P-ID: %u", EXTRACT_16BITS(tptr)));
- }
- break;
- case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
- if (subl >= 36) {
- gmpls_switch_cap = *tptr;
- ND_PRINT((ndo, "%s Interface Switching Capability:%s",
- ident,
- tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)));
- ND_PRINT((ndo, ", LSP Encoding: %s",
- tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1))));
- tptr+=4;
- ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident));
- for (priority_level = 0; priority_level < 8; priority_level++) {
- bw.i = EXTRACT_32BITS(tptr);
- ND_PRINT((ndo, "%s priority level %d: %.3f Mbps",
- ident,
- priority_level,
- bw.f * 8 / 1000000));
- tptr+=4;
- }
- subl-=36;
- switch (gmpls_switch_cap) {
- case GMPLS_PSC1:
- case GMPLS_PSC2:
- case GMPLS_PSC3:
- case GMPLS_PSC4:
- bw.i = EXTRACT_32BITS(tptr);
- ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
- ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4)));
- break;
- case GMPLS_TSC:
- bw.i = EXTRACT_32BITS(tptr);
- ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000));
- ND_PRINT((ndo, "%s Indication %s", ident,
- tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr + 4))));
- break;
- default:
- /* 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(ndo, tptr, "\n\t\t ", subl))
- return(0);
- }
- }
- }
- break;
- default:
- if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl))
- return(0);
- break;
- }
- return(1);
-
-trunctlv:
- ND_PRINT((ndo, "%spacket exceeded snapshot", ident));
+trunc:
+ nd_print_trunc(ndo);
return(0);
}
-
/*
* this is the common IS-REACH decoder it is called
* from various EXTD-IS REACH style TLVs (22,24,222)
static int
isis_print_ext_is_reach(netdissect_options *ndo,
- const uint8_t *tptr, const char *ident, int tlv_type)
+ const uint8_t *tptr, const char *ident, u_int tlv_type,
+ u_int tlv_remaining)
{
char ident_buffer[20];
- int subtlv_type,subtlv_len,subtlv_sum_len;
+ u_int subtlv_type,subtlv_len,subtlv_sum_len;
int proc_bytes = 0; /* how many bytes did we process ? */
+ u_int te_class,priority_level,gmpls_switch_cap;
+ union { /* int to float conversion buffer for several subTLVs */
+ float f;
+ uint32_t i;
+ } bw;
- if (!ND_TTEST2(*tptr, NODE_ID_LEN))
+ if (!ND_TTEST_LEN(tptr, NODE_ID_LEN))
+ return(0);
+ if (tlv_remaining < NODE_ID_LEN)
return(0);
- ND_PRINT((ndo, "%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)));
- tptr+=(NODE_ID_LEN);
+ ND_PRINT("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN));
+ tptr+=NODE_ID_LEN;
+ tlv_remaining-=NODE_ID_LEN;
if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */
- if (!ND_TTEST2(*tptr, 3)) /* and is therefore skipped */
+ if (!ND_TTEST_3(tptr)) /* and is therefore skipped */
return(0);
- ND_PRINT((ndo, ", Metric: %d", EXTRACT_24BITS(tptr)));
+ if (tlv_remaining < 3)
+ return(0);
+ ND_PRINT(", Metric: %u", EXTRACT_BE_U_3(tptr));
tptr+=3;
+ tlv_remaining-=3;
}
- if (!ND_TTEST2(*tptr, 1))
+ if (!ND_TTEST_1(tptr))
+ return(0);
+ if (tlv_remaining < 1)
return(0);
- subtlv_sum_len=*(tptr++); /* read out subTLV length */
+ subtlv_sum_len=EXTRACT_U_1(tptr); /* read out subTLV length */
+ tptr++;
+ tlv_remaining--;
proc_bytes=NODE_ID_LEN+3+1;
- ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no "));
+ ND_PRINT(", %ssub-TLVs present",subtlv_sum_len ? "" : "no ");
if (subtlv_sum_len) {
- ND_PRINT((ndo, " (%u)", subtlv_sum_len));
- while (subtlv_sum_len>0) {
- if (!ND_TTEST2(*tptr,2))
+ ND_PRINT(" (%u)", subtlv_sum_len);
+ /* prepend the indent string */
+ nd_snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
+ ident = ident_buffer;
+ while (subtlv_sum_len != 0) {
+ if (!ND_TTEST_2(tptr))
return(0);
- subtlv_type=*(tptr++);
- subtlv_len=*(tptr++);
- /* prepend the ident string */
- snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
- if (!isis_print_is_reach_subtlv(ndo, tptr, subtlv_type, subtlv_len, ident_buffer))
- return(0);
- tptr+=subtlv_len;
- subtlv_sum_len-=(subtlv_len+2);
- proc_bytes+=(subtlv_len+2);
+ if (tlv_remaining < 2) {
+ ND_PRINT("%sRemaining data in TLV shorter than a subTLV header",ident);
+ proc_bytes += tlv_remaining;
+ break;
+ }
+ if (subtlv_sum_len < 2) {
+ ND_PRINT("%sRemaining data in subTLVs shorter than a subTLV header",ident);
+ proc_bytes += subtlv_sum_len;
+ break;
+ }
+ subtlv_type=EXTRACT_U_1(tptr);
+ subtlv_len=EXTRACT_U_1(tptr + 1);
+ tptr += 2;
+ tlv_remaining -= 2;
+ subtlv_sum_len -= 2;
+ proc_bytes += 2;
+ ND_PRINT("%s%s subTLV #%u, length: %u",
+ ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subtlv_type),
+ subtlv_type, subtlv_len);
+
+ if (subtlv_sum_len < subtlv_len) {
+ ND_PRINT(" (remaining data in subTLVs shorter than the current subTLV)");
+ proc_bytes += subtlv_sum_len;
+ break;
+ }
+
+ if (tlv_remaining < subtlv_len) {
+ ND_PRINT(" (> remaining tlv length)");
+ proc_bytes += tlv_remaining;
+ break;
+ }
+
+ ND_TCHECK_LEN(tptr, subtlv_len);
+
+ switch(subtlv_type) {
+ 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:
+ if (subtlv_len >= 4) {
+ ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr));
+ if (subtlv_len == 8) /* rfc4205 */
+ ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr + 4));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR:
+ case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR:
+ if (subtlv_len >= sizeof(nd_ipv4))
+ ND_PRINT(", %s", ipaddr_string(ndo, tptr));
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW :
+ case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW:
+ if (subtlv_len >= 4) {
+ bw.i = EXTRACT_BE_U_4(tptr);
+ ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW :
+ if (subtlv_len >= 32) {
+ for (te_class = 0; te_class < 8; te_class++) {
+ bw.i = EXTRACT_BE_U_4(tptr);
+ ND_PRINT("%s TE-Class %u: %.3f Mbps",
+ ident,
+ te_class,
+ bw.f * 8 / 1000000);
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ }
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */
+ case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD:
+ if (subtlv_len == 0)
+ break;
+ ND_PRINT("%sBandwidth Constraints Model ID: %s (%u)",
+ ident,
+ tok2str(diffserv_te_bc_values, "unknown", EXTRACT_U_1(tptr)),
+ EXTRACT_U_1(tptr));
+ tptr++;
+ subtlv_len--;
+ subtlv_sum_len--;
+ proc_bytes++;
+ /* decode BCs until the subTLV ends */
+ for (te_class = 0; subtlv_len != 0; te_class++) {
+ if (subtlv_len < 4)
+ break;
+ bw.i = EXTRACT_BE_U_4(tptr);
+ ND_PRINT("%s Bandwidth constraint CT%u: %.3f Mbps",
+ ident,
+ te_class,
+ bw.f * 8 / 1000000);
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC:
+ if (subtlv_len >= 3)
+ ND_PRINT(", %u", EXTRACT_BE_U_3(tptr));
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE:
+ if (subtlv_len == 2) {
+ ND_PRINT(", [ %s ] (0x%04x)",
+ bittok2str(isis_subtlv_link_attribute_values,
+ "Unknown",
+ EXTRACT_BE_U_2(tptr)),
+ EXTRACT_BE_U_2(tptr));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE:
+ if (subtlv_len >= 2) {
+ ND_PRINT(", %s, Priority %u",
+ bittok2str(gmpls_link_prot_values, "none", EXTRACT_U_1(tptr)),
+ EXTRACT_U_1(tptr + 1));
+ }
+ break;
+ case ISIS_SUBTLV_SPB_METRIC:
+ if (subtlv_len >= 6) {
+ ND_PRINT(", LM: %u", EXTRACT_BE_U_3(tptr));
+ tptr += 3;
+ subtlv_len -= 3;
+ subtlv_sum_len -= 3;
+ proc_bytes += 3;
+ ND_PRINT(", P: %u", EXTRACT_U_1(tptr));
+ tptr++;
+ subtlv_len--;
+ subtlv_sum_len--;
+ proc_bytes++;
+ ND_PRINT(", P-ID: %u", EXTRACT_BE_U_2(tptr));
+ }
+ break;
+ case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR:
+ if (subtlv_len >= 36) {
+ gmpls_switch_cap = EXTRACT_U_1(tptr);
+ ND_PRINT("%s Interface Switching Capability:%s",
+ ident,
+ tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap));
+ ND_PRINT(", LSP Encoding: %s",
+ tok2str(gmpls_encoding_values, "Unknown", EXTRACT_U_1((tptr + 1))));
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ ND_PRINT("%s Max LSP Bandwidth:", ident);
+ for (priority_level = 0; priority_level < 8; priority_level++) {
+ bw.i = EXTRACT_BE_U_4(tptr);
+ ND_PRINT("%s priority level %u: %.3f Mbps",
+ ident,
+ priority_level,
+ bw.f * 8 / 1000000);
+ tptr += 4;
+ subtlv_len -= 4;
+ subtlv_sum_len -= 4;
+ proc_bytes += 4;
+ }
+ switch (gmpls_switch_cap) {
+ case GMPLS_PSC1:
+ case GMPLS_PSC2:
+ case GMPLS_PSC3:
+ case GMPLS_PSC4:
+ if (subtlv_len < 6)
+ break;
+ bw.i = EXTRACT_BE_U_4(tptr);
+ ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
+ ND_PRINT("%s Interface MTU: %u", ident, EXTRACT_BE_U_2(tptr + 4));
+ break;
+ case GMPLS_TSC:
+ if (subtlv_len < 8)
+ break;
+ bw.i = EXTRACT_BE_U_4(tptr);
+ ND_PRINT("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000);
+ ND_PRINT("%s Indication %s", ident,
+ tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", EXTRACT_U_1((tptr + 4))));
+ break;
+ default:
+ /* there is some optional stuff left to decode but this is as of yet
+ not specified so just lets hexdump what is left */
+ if (subtlv_len != 0) {
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
+ return(0);
+ }
+ }
+ }
+ break;
+ default:
+ if (!print_unknown_data(ndo, tptr, "\n\t\t ", subtlv_len))
+ return(0);
+ break;
+ }
+
+ tptr += subtlv_len;
+ tlv_remaining -= subtlv_len;
+ subtlv_sum_len -= subtlv_len;
+ proc_bytes += subtlv_len;
}
}
return(proc_bytes);
+
+trunc:
+ return(0);
}
/*
isis_print_mtid(netdissect_options *ndo,
const uint8_t *tptr, const char *ident)
{
- if (!ND_TTEST2(*tptr, 2))
+ if (!ND_TTEST_2(tptr))
return(0);
- ND_PRINT((ndo, "%s%s",
+ ND_PRINT("%s%s",
ident,
tok2str(isis_mt_values,
"Reserved for IETF Consensus",
- ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))));
+ ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr))));
- ND_PRINT((ndo, " Topology (0x%03x), Flags: [%s]",
- ISIS_MASK_MTID(EXTRACT_16BITS(tptr)),
- bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))));
+ ND_PRINT(" Topology (0x%03x), Flags: [%s]",
+ ISIS_MASK_MTID(EXTRACT_BE_U_2(tptr)),
+ bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_BE_U_2(tptr))));
return(2);
}
const uint8_t *tptr, const char *ident, uint16_t afi)
{
char ident_buffer[20];
-#ifdef INET6
- uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
-#else
- uint8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */
-#endif
+ uint8_t prefix[sizeof(nd_ipv6)]; /* shared copy buffer for IPv4 and IPv6 prefixes */
u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen;
- if (!ND_TTEST2(*tptr, 4))
+ if (!ND_TTEST_4(tptr))
return (0);
- metric = EXTRACT_32BITS(tptr);
+ metric = EXTRACT_BE_U_4(tptr);
processed=4;
tptr+=4;
if (afi == AF_INET) {
- if (!ND_TTEST2(*tptr, 1)) /* fetch status byte */
+ if (!ND_TTEST_1(tptr)) /* fetch status byte */
return (0);
- status_byte=*(tptr++);
+ status_byte=EXTRACT_U_1(tptr);
+ tptr++;
bit_length = status_byte&0x3f;
if (bit_length > 32) {
- ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u",
+ ND_PRINT("%sIPv4 prefix: bad bit length %u",
ident,
- bit_length));
+ bit_length);
return (0);
}
processed++;
-#ifdef INET6
} else if (afi == AF_INET6) {
- if (!ND_TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */
+ if (!ND_TTEST_2(tptr)) /* fetch status & prefix_len byte */
return (0);
- status_byte=*(tptr++);
- bit_length=*(tptr++);
+ status_byte=EXTRACT_U_1(tptr);
+ bit_length=EXTRACT_U_1(tptr + 1);
if (bit_length > 128) {
- ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u",
+ ND_PRINT("%sIPv6 prefix: bad bit length %u",
ident,
- bit_length));
+ bit_length);
return (0);
}
+ tptr+=2;
processed+=2;
-#endif
} else
return (0); /* somebody is fooling us */
byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */
- if (!ND_TTEST2(*tptr, byte_length))
+ if (!ND_TTEST_LEN(tptr, byte_length))
return (0);
- memset(prefix, 0, sizeof prefix); /* clear the copy buffer */
+ memset(prefix, 0, sizeof(prefix)); /* clear the copy buffer */
memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */
tptr+=byte_length;
processed+=byte_length;
if (afi == AF_INET)
- ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u",
+ ND_PRINT("%sIPv4 prefix: %15s/%u",
ident,
ipaddr_string(ndo, prefix),
- bit_length));
-#ifdef INET6
- if (afi == AF_INET6)
- ND_PRINT((ndo, "%sIPv6 prefix: %s/%u",
+ bit_length);
+ else if (afi == AF_INET6)
+ ND_PRINT("%sIPv6 prefix: %s/%u",
ident,
ip6addr_string(ndo, prefix),
- bit_length));
-#endif
+ bit_length);
- ND_PRINT((ndo, ", Distribution: %s, Metric: %u",
+ ND_PRINT(", Distribution: %s, Metric: %u",
ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up",
- metric));
+ metric);
if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
- ND_PRINT((ndo, ", sub-TLVs present"));
-#ifdef INET6
- if (afi == AF_INET6)
- ND_PRINT((ndo, ", %s%s",
+ ND_PRINT(", sub-TLVs present");
+ else if (afi == AF_INET6)
+ ND_PRINT(", %s%s",
ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal",
- ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""));
-#endif
+ ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "");
if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte))
-#ifdef INET6
|| (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte))
-#endif
- ) {
+ ) {
/* assume that one prefix can hold more
than one subTLV - therefore the first byte must reflect
the aggregate bytecount of the subTLVs for this prefix
*/
- if (!ND_TTEST2(*tptr, 1))
+ if (!ND_TTEST_1(tptr))
return (0);
- sublen=*(tptr++);
+ sublen=EXTRACT_U_1(tptr);
+ tptr++;
processed+=sublen+1;
- ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */
+ ND_PRINT(" (%u)", sublen); /* print out subTLV length */
while (sublen>0) {
- if (!ND_TTEST2(*tptr,2))
+ if (!ND_TTEST_2(tptr))
return (0);
- subtlvtype=*(tptr++);
- subtlvlen=*(tptr++);
- /* prepend the ident string */
- snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
+ subtlvtype=EXTRACT_U_1(tptr);
+ subtlvlen=EXTRACT_U_1(tptr + 1);
+ tptr+=2;
+ /* prepend the indent string */
+ nd_snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident);
if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer))
return(0);
tptr+=subtlvlen;
return (processed);
}
+/*
+ * Clear checksum and lifetime prior to signature verification.
+ */
+static void
+isis_clear_checksum_lifetime(void *header)
+{
+ struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header;
+
+ header_lsp->checksum[0] = 0;
+ header_lsp->checksum[1] = 0;
+ header_lsp->remaining_lifetime[0] = 0;
+ header_lsp->remaining_lifetime[1] = 0;
+}
+
/*
* isis_print
* Decode IS-IS packets. Return 0 on error.
const struct isis_iih_lan_header *header_iih_lan;
const struct isis_iih_ptp_header *header_iih_ptp;
- struct isis_lsp_header *header_lsp;
+ 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_is_reach *tlv_is_reach;
const struct isis_tlv_es_reach *tlv_es_reach;
- uint8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
+ uint8_t version, pdu_version, fixed_len;
+ uint8_t pdu_type, pdu_max_area, max_area, pdu_id_length, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len;
uint8_t ext_is_len, ext_ip_len, mt_len;
+ uint8_t isis_subtlv_idrp;
const uint8_t *optr, *pptr, *tptr;
u_short packet_len,pdu_len, key_id;
u_int i,vendor_id;
int sigcheck;
+ ndo->ndo_protocol = "isis";
packet_len=length;
optr = p; /* initialize the _o_riginal pointer to the packet start -
need it for parsing the checksum TLV and authentication
TLV verification */
isis_header = (const struct isis_common_header *)p;
- ND_TCHECK(*isis_header);
+ ND_TCHECK_SIZE(isis_header);
+ if (length < ISIS_COMMON_HEADER_SIZE)
+ goto trunc;
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 = (struct isis_lsp_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;
if (!ndo->ndo_eflag)
- ND_PRINT((ndo, "IS-IS"));
+ ND_PRINT("IS-IS");
/*
* Sanity checking of the header.
*/
- if (isis_header->version != ISIS_VERSION) {
- ND_PRINT((ndo, "version %d packet not supported", isis_header->version));
+ version = EXTRACT_U_1(isis_header->version);
+ if (version != ISIS_VERSION) {
+ ND_PRINT("version %u packet not supported", version);
return (0);
}
- if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) {
- ND_PRINT((ndo, "system ID length of %d is not supported",
- isis_header->id_length));
+ pdu_id_length = EXTRACT_U_1(isis_header->id_length);
+ if ((pdu_id_length != SYSTEM_ID_LEN) && (pdu_id_length != 0)) {
+ ND_PRINT("system ID length of %u is not supported",
+ pdu_id_length);
return (0);
}
- if (isis_header->pdu_version != ISIS_VERSION) {
- ND_PRINT((ndo, "version %d packet not supported", isis_header->pdu_version));
+ pdu_version = EXTRACT_U_1(isis_header->pdu_version);
+ if (pdu_version != ISIS_VERSION) {
+ ND_PRINT("version %u packet not supported", pdu_version);
return (0);
}
- max_area = isis_header->max_area;
- switch(max_area) {
+ fixed_len = EXTRACT_U_1(isis_header->fixed_len);
+ if (length < fixed_len) {
+ ND_PRINT("fixed header length %u > packet length %u", fixed_len, length);
+ return (0);
+ }
+
+ if (fixed_len < ISIS_COMMON_HEADER_SIZE) {
+ ND_PRINT("fixed header length %u < minimum header size %u", fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE);
+ return (0);
+ }
+
+ pdu_max_area = EXTRACT_U_1(isis_header->max_area);
+ switch(pdu_max_area) {
case 0:
max_area = 3; /* silly shit */
break;
case 255:
- ND_PRINT((ndo, "bad packet -- 255 areas"));
+ ND_PRINT("bad packet -- 255 areas");
return (0);
default:
+ max_area = pdu_max_area;
break;
}
- id_length = isis_header->id_length;
- switch(id_length) {
+ switch(pdu_id_length) {
case 0:
id_length = 6; /* silly shit again */
break;
case 6:
case 7:
case 8:
+ id_length = pdu_id_length;
break;
case 255:
id_length = 0; /* entirely useless */
break;
default:
+ id_length = pdu_id_length;
break;
}
/* toss any non 6-byte sys-ID len PDUs */
if (id_length != 6 ) {
- ND_PRINT((ndo, "bad packet -- illegal sys-ID length (%u)", id_length));
+ ND_PRINT("bad packet -- illegal sys-ID length (%u)", id_length);
return (0);
}
- pdu_type=isis_header->pdu_type;
+ pdu_type = EXTRACT_U_1(isis_header->pdu_type);
/* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/
- if (ndo->ndo_vflag < 1) {
- ND_PRINT((ndo, "%s%s",
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT("%s%s",
ndo->ndo_eflag ? "" : ", ",
- tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type)));
-
- switch (pdu_type) {
-
- case ISIS_PDU_L1_LAN_IIH:
- case ISIS_PDU_L2_LAN_IIH:
- ND_PRINT((ndo, ", src-id %s",
- isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN)));
- ND_PRINT((ndo, ", lan-id %s, prio %u",
- isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
- header_iih_lan->priority));
- break;
- case ISIS_PDU_PTP_IIH:
- ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN)));
- break;
- case ISIS_PDU_L1_LSP:
- case ISIS_PDU_L2_LSP:
- ND_PRINT((ndo, ", lsp-id %s, seq 0x%08x, lifetime %5us",
- isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
- EXTRACT_32BITS(header_lsp->sequence_number),
- EXTRACT_16BITS(header_lsp->remaining_lifetime)));
- break;
- case ISIS_PDU_L1_CSNP:
- case ISIS_PDU_L2_CSNP:
- ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN)));
- break;
- case ISIS_PDU_L1_PSNP:
- case ISIS_PDU_L2_PSNP:
- ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN)));
- break;
-
- }
- ND_PRINT((ndo, ", length %u", length));
-
- return(1);
- }
-
- /* ok they seem to want to know everything - lets fully decode it */
- ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length));
-
- ND_PRINT((ndo, "\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
- tok2str(isis_pdu_values,
- "unknown, type %u",
- pdu_type),
- isis_header->fixed_len,
- isis_header->version,
- isis_header->pdu_version,
- id_length,
- isis_header->id_length,
- max_area,
- isis_header->max_area));
-
- if (ndo->ndo_vflag > 1) {
- if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
- return(0); /* for optionally debugging the common header */
+ tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type));
+ } else {
+ /* ok they seem to want to know everything - lets fully decode it */
+ ND_PRINT("%slength %u", ndo->ndo_eflag ? "" : ", ", length);
+
+ ND_PRINT("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)",
+ tok2str(isis_pdu_values,
+ "unknown, type %u",
+ pdu_type),
+ fixed_len,
+ version,
+ pdu_version,
+ id_length,
+ pdu_id_length,
+ max_area,
+ pdu_max_area);
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */
+ return (0); /* for optionally debugging the common header */
+ }
}
switch (pdu_type) {
case ISIS_PDU_L1_LAN_IIH:
case ISIS_PDU_L2_LAN_IIH:
- if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
- ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
- isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE));
- return (0);
- }
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %lu",
+ fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE));
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_iih_lan);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s",
+ isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN));
+ ND_PRINT(", lan-id %s, prio %u",
+ isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN),
+ EXTRACT_U_1(header_iih_lan->priority));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=EXTRACT_BE_U_2(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;
+ }
- 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;
- }
+ ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
+ EXTRACT_BE_U_2(header_iih_lan->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ EXTRACT_U_1(header_iih_lan->circuit_type)));
- ND_TCHECK(*header_iih_lan);
- ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]",
- isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN),
- EXTRACT_16BITS(header_iih_lan->holding_time),
- tok2str(isis_iih_circuit_type_values,
- "unknown circuit type 0x%02x",
- header_iih_lan->circuit_type)));
-
- ND_PRINT((ndo, "\n\t lan-id: %s, Priority: %u, PDU length: %u",
- isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
- (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
- pdu_len));
-
- if (ndo->ndo_vflag > 1) {
- if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
- return(0);
- }
+ ND_PRINT("\n\t lan-id: %s, Priority: %u, PDU length: %u",
+ isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN),
+ EXTRACT_U_1(header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK,
+ pdu_len);
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
- break;
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE))
+ return (0);
+ }
- case ISIS_PDU_PTP_IIH:
- if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
- ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
- isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE));
- return (0);
- }
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE);
+ break;
- pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len);
- if (packet_len>pdu_len) {
+ case ISIS_PDU_PTP_IIH:
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %lu",
+ fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE));
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_iih_ptp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=EXTRACT_BE_U_2(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;
- }
+ }
- ND_TCHECK(*header_iih_ptp);
- ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]",
- isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
- EXTRACT_16BITS(header_iih_ptp->holding_time),
- tok2str(isis_iih_circuit_type_values,
- "unknown circuit type 0x%02x",
- header_iih_ptp->circuit_type)));
+ ND_PRINT("\n\t source-id: %s, holding time: %us, Flags: [%s]",
+ isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN),
+ EXTRACT_BE_U_2(header_iih_ptp->holding_time),
+ tok2str(isis_iih_circuit_type_values,
+ "unknown circuit type 0x%02x",
+ EXTRACT_U_1(header_iih_ptp->circuit_type)));
- ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u",
- header_iih_ptp->circuit_id,
- pdu_len));
+ ND_PRINT("\n\t circuit-id: 0x%02x, PDU length: %u",
+ EXTRACT_U_1(header_iih_ptp->circuit_id),
+ pdu_len);
- if (ndo->ndo_vflag > 1) {
- if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
- return(0);
- }
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE))
+ return (0);
+ }
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE);
- 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 ISIS_PDU_L1_LSP:
case ISIS_PDU_L2_LSP:
- if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
- ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
- isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE));
- return (0);
- }
-
- pdu_len=EXTRACT_16BITS(header_lsp->pdu_len);
- if (packet_len>pdu_len) {
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %lu",
+ fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE);
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_lsp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", lsp-id %s, seq 0x%08x, lifetime %5us",
+ isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
+ EXTRACT_BE_U_4(header_lsp->sequence_number),
+ EXTRACT_BE_U_2(header_lsp->remaining_lifetime));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=EXTRACT_BE_U_2(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;
- }
+ }
- ND_TCHECK(*header_lsp);
- ND_PRINT((ndo, "\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
+ ND_PRINT("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x",
isis_print_id(header_lsp->lsp_id, LSP_ID_LEN),
- EXTRACT_32BITS(header_lsp->sequence_number),
- EXTRACT_16BITS(header_lsp->remaining_lifetime),
- EXTRACT_16BITS(header_lsp->checksum)));
-
-
- osi_print_cksum(ndo, (uint8_t *)header_lsp->lsp_id,
- EXTRACT_16BITS(header_lsp->checksum), 12, length-12);
-
- /*
- * Clear checksum and lifetime prior to signature verification.
- */
- header_lsp->checksum[0] = 0;
- header_lsp->checksum[1] = 0;
- header_lsp->remaining_lifetime[0] = 0;
- header_lsp->remaining_lifetime[1] = 0;
+ EXTRACT_BE_U_4(header_lsp->sequence_number),
+ EXTRACT_BE_U_2(header_lsp->remaining_lifetime),
+ EXTRACT_BE_U_2(header_lsp->checksum));
+ osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id,
+ EXTRACT_BE_U_2(header_lsp->checksum),
+ 12, length-12);
- ND_PRINT((ndo, ", PDU length: %u, Flags: [ %s",
+ ND_PRINT(", PDU length: %u, Flags: [ %s",
pdu_len,
- ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""));
-
- if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
- ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""));
- ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""));
- ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""));
- ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""));
- ND_PRINT((ndo, "ATT bit set, "));
- }
- ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""));
- ND_PRINT((ndo, "%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
- ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))));
+ ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "");
+
+ if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) {
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "");
+ ND_PRINT("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "");
+ ND_PRINT("ATT bit set, ");
+ }
+ ND_PRINT("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "");
+ ND_PRINT("%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)",
+ ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)));
- if (ndo->ndo_vflag > 1) {
- if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
- return(0);
- }
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE))
+ return (0);
+ }
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
- break;
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE);
+ break;
case ISIS_PDU_L1_CSNP:
case ISIS_PDU_L2_CSNP:
- if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
- ND_PRINT((ndo, ", bogus fixed header length %u should be %lu",
- isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE));
- return (0);
- }
-
- pdu_len=EXTRACT_16BITS(header_csnp->pdu_len);
- if (packet_len>pdu_len) {
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) {
+ ND_PRINT(", bogus fixed header length %u should be %lu",
+ fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE));
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_csnp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=EXTRACT_BE_U_2(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;
- }
+ }
- ND_TCHECK(*header_csnp);
- ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
+ ND_PRINT("\n\t source-id: %s, PDU length: %u",
isis_print_id(header_csnp->source_id, NODE_ID_LEN),
- pdu_len));
- ND_PRINT((ndo, "\n\t start lsp-id: %s",
- isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)));
- ND_PRINT((ndo, "\n\t end lsp-id: %s",
- isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)));
-
- if (ndo->ndo_vflag > 1) {
- if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
- return(0);
- }
+ pdu_len);
+ ND_PRINT("\n\t start lsp-id: %s",
+ isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN));
+ ND_PRINT("\n\t end lsp-id: %s",
+ isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN));
+
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE))
+ return (0);
+ }
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE);
break;
case ISIS_PDU_L1_PSNP:
case ISIS_PDU_L2_PSNP:
- if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
- ND_PRINT((ndo, "- bogus fixed header length %u should be %lu",
- isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE));
- return (0);
- }
-
- pdu_len=EXTRACT_16BITS(header_psnp->pdu_len);
- if (packet_len>pdu_len) {
+ if (fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) {
+ ND_PRINT("- bogus fixed header length %u should be %lu",
+ fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE));
+ return (0);
+ }
+ ND_TCHECK_SIZE(header_psnp);
+ if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)
+ goto trunc;
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN));
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
+ pdu_len=EXTRACT_BE_U_2(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;
- }
+ }
- ND_TCHECK(*header_psnp);
- ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u",
+ ND_PRINT("\n\t source-id: %s, PDU length: %u",
isis_print_id(header_psnp->source_id, NODE_ID_LEN),
- pdu_len));
+ pdu_len);
- if (ndo->ndo_vflag > 1) {
- if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
- return(0);
- }
+ if (ndo->ndo_vflag > 1) {
+ if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE))
+ return (0);
+ }
- packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
- pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
- break;
+ packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE);
+ break;
default:
+ if (ndo->ndo_vflag == 0) {
+ ND_PRINT(", length %u", length);
+ return (1);
+ }
(void)print_unknown_data(ndo, pptr, "\n\t ", length);
return (0);
}
* Now print the TLV's.
*/
- while (packet_len >= 2) {
- if (pptr == ndo->ndo_snapend) {
- return (1);
- }
-
- if (!ND_TTEST2(*pptr, 2)) {
- ND_PRINT((ndo, "\n\t\t packet exceeded snapshot (%ld) bytes",
- (long)(pptr - ndo->ndo_snapend)));
- return (1);
- }
- tlv_type = *pptr++;
- tlv_len = *pptr++;
+ while (packet_len > 0) {
+ ND_TCHECK_2(pptr);
+ if (packet_len < 2)
+ goto trunc;
+ tlv_type = EXTRACT_U_1(pptr);
+ tlv_len = EXTRACT_U_1(pptr + 1);
+ pptr += 2;
+ packet_len -= 2;
tmp =tlv_len; /* copy temporary len & pointer to packet data */
tptr = pptr;
- packet_len -= 2;
- if (tlv_len > packet_len) {
- break;
- }
/* first lets see if we know the TLVs name*/
- ND_PRINT((ndo, "\n\t %s TLV #%u, length: %u",
+ ND_PRINT("\n\t %s TLV #%u, length: %u",
tok2str(isis_tlv_values,
"unknown",
tlv_type),
tlv_type,
- tlv_len));
+ tlv_len);
- if (tlv_len == 0) /* something is malformed */
+ if (tlv_len == 0) /* something is invalid */
continue;
+ if (packet_len < tlv_len)
+ goto trunc;
+
/* now check if we have a decoder otherwise do a hexdump at the end*/
switch (tlv_type) {
case ISIS_TLV_AREA_ADDR:
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
- alen = *tptr++;
+ ND_TCHECK_1(tptr);
+ alen = EXTRACT_U_1(tptr);
+ tptr++;
while (tmp && alen < tmp) {
- ND_PRINT((ndo, "\n\t Area address (length: %u): %s",
+ ND_TCHECK_LEN(tptr, alen);
+ ND_PRINT("\n\t Area address (length: %u): %s",
alen,
- isonsap_string(tptr, alen)));
+ isonsap_string(ndo, tptr, alen));
tptr += alen;
tmp -= alen + 1;
if (tmp==0) /* if this is the last area address do not attemt a boundary check */
break;
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
- alen = *tptr++;
+ ND_TCHECK_1(tptr);
+ alen = EXTRACT_U_1(tptr);
+ tptr++;
}
break;
case ISIS_TLV_ISNEIGH:
- while (tmp >= ETHER_ADDR_LEN) {
- if (!ND_TTEST2(*tptr, ETHER_ADDR_LEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t SNPA: %s", isis_print_id(tptr, ETHER_ADDR_LEN)));
- tmp -= ETHER_ADDR_LEN;
- tptr += ETHER_ADDR_LEN;
+ while (tmp >= MAC_ADDR_LEN) {
+ ND_TCHECK_LEN(tptr, MAC_ADDR_LEN);
+ ND_PRINT("\n\t SNPA: %s", isis_print_id(tptr, MAC_ADDR_LEN));
+ tmp -= MAC_ADDR_LEN;
+ tptr += MAC_ADDR_LEN;
}
break;
case ISIS_TLV_ISNEIGH_VARLEN:
- if (!ND_TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */
- goto trunctlv;
- lan_alen = *tptr++; /* LAN address length */
+ if (!ND_TTEST_1(tptr) || tmp < 3) /* min. TLV length */
+ goto trunc;
+ lan_alen = EXTRACT_U_1(tptr); /* LAN address length */
+ tptr++;
if (lan_alen == 0) {
- ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)"));
+ ND_PRINT("\n\t LAN address length 0 bytes (invalid)");
break;
}
tmp --;
- ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen));
+ ND_PRINT("\n\t LAN address length %u bytes ", lan_alen);
while (tmp >= lan_alen) {
- if (!ND_TTEST2(*tptr, lan_alen))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen)));
+ ND_TCHECK_LEN(tptr, lan_alen);
+ ND_PRINT("\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen));
tmp -= lan_alen;
tptr +=lan_alen;
}
case ISIS_TLV_MT_IS_REACH:
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
if (mt_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tptr+=mt_len;
tmp-=mt_len;
while (tmp >= 2+NODE_ID_LEN+3+1) {
- ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type);
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
if (ext_is_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tmp-=ext_is_len;
tptr+=ext_is_len;
case ISIS_TLV_IS_ALIAS_ID:
while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */
- ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type);
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
if (ext_is_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tmp-=ext_is_len;
tptr+=ext_is_len;
}
case ISIS_TLV_EXT_IS_REACH:
while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */
- ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type);
+ ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type, tmp);
if (ext_is_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tmp-=ext_is_len;
tptr+=ext_is_len;
}
break;
case ISIS_TLV_IS_REACH:
- if (!ND_TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */
- goto trunctlv;
- ND_PRINT((ndo, "\n\t %s",
+ ND_TCHECK_1(tptr); /* check if there is one byte left to read out the virtual flag */
+ ND_PRINT("\n\t %s",
tok2str(isis_is_reach_virtual_values,
"bogus virtual flag 0x%02x",
- *tptr++)));
+ EXTRACT_U_1(tptr)));
+ tptr++;
tlv_is_reach = (const struct isis_tlv_is_reach *)tptr;
while (tmp >= sizeof(struct isis_tlv_is_reach)) {
- if (!ND_TTEST(*tlv_is_reach))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t IS Neighbor: %s",
- isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)));
+ ND_TCHECK_SIZE(tlv_is_reach);
+ ND_PRINT("\n\t IS Neighbor: %s",
+ isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN));
isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block);
tmp -= sizeof(struct isis_tlv_is_reach);
tlv_is_reach++;
case ISIS_TLV_ESNEIGH:
tlv_es_reach = (const struct isis_tlv_es_reach *)tptr;
while (tmp >= sizeof(struct isis_tlv_es_reach)) {
- if (!ND_TTEST(*tlv_es_reach))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t ES Neighbor: %s",
- isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN)));
+ ND_TCHECK_SIZE(tlv_es_reach);
+ ND_PRINT("\n\t ES Neighbor: %s",
+ isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN));
isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block);
tmp -= sizeof(struct isis_tlv_es_reach);
tlv_es_reach++;
while (tmp>0) {
ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
if (ext_ip_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tptr+=ext_ip_len;
tmp-=ext_ip_len;
}
case ISIS_TLV_MT_IP_REACH:
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
if (mt_len == 0) { /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
}
tptr+=mt_len;
tmp-=mt_len;
while (tmp>0) {
ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET);
if (ext_ip_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tptr+=ext_ip_len;
tmp-=ext_ip_len;
}
break;
-#ifdef INET6
case ISIS_TLV_IP6_REACH:
while (tmp>0) {
ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
if (ext_ip_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tptr+=ext_ip_len;
tmp-=ext_ip_len;
}
case ISIS_TLV_MT_IP6_REACH:
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
if (mt_len == 0) { /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
}
tptr+=mt_len;
tmp-=mt_len;
while (tmp>0) {
ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6);
if (ext_ip_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tptr+=ext_ip_len;
tmp-=ext_ip_len;
}
break;
case ISIS_TLV_IP6ADDR:
- while (tmp>=sizeof(struct in6_addr)) {
- if (!ND_TTEST2(*tptr, sizeof(struct in6_addr)))
- goto trunctlv;
+ while (tmp>=sizeof(nd_ipv6)) {
+ ND_TCHECK_LEN(tptr, sizeof(nd_ipv6));
- ND_PRINT((ndo, "\n\t IPv6 interface address: %s",
- ip6addr_string(ndo, tptr)));
+ ND_PRINT("\n\t IPv6 interface address: %s",
+ ip6addr_string(ndo, tptr));
- tptr += sizeof(struct in6_addr);
- tmp -= sizeof(struct in6_addr);
+ tptr += sizeof(nd_ipv6);
+ tmp -= sizeof(nd_ipv6);
}
break;
-#endif
case ISIS_TLV_AUTH:
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
+ ND_TCHECK_1(tptr);
- ND_PRINT((ndo, "\n\t %s: ",
+ ND_PRINT("\n\t %s: ",
tok2str(isis_subtlv_auth_values,
"unknown Authentication type 0x%02x",
- *tptr)));
+ EXTRACT_U_1(tptr)));
- switch (*tptr) {
+ switch (EXTRACT_U_1(tptr)) {
case ISIS_SUBTLV_AUTH_SIMPLE:
- for(i=1;i<tlv_len;i++) {
- if (!ND_TTEST2(*(tptr + i), 1))
- goto trunctlv;
- ND_PRINT((ndo, "%c", *(tptr + i)));
- }
+ if (nd_printzp(ndo, tptr + 1, tlv_len - 1, ndo->ndo_snapend))
+ goto trunc;
break;
case ISIS_SUBTLV_AUTH_MD5:
for(i=1;i<tlv_len;i++) {
- if (!ND_TTEST2(*(tptr + i), 1))
- goto trunctlv;
- ND_PRINT((ndo, "%02x", *(tptr + i)));
+ ND_TCHECK_1(tptr + i);
+ ND_PRINT("%02x", EXTRACT_U_1(tptr + i));
}
if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1)
- ND_PRINT((ndo, ", (malformed subTLV) "));
+ ND_PRINT(", (invalid subTLV) ");
-#ifdef HAVE_LIBCRYPTO
- sigcheck = signature_verify(ndo, optr, length,
- (unsigned char *)tptr + 1);
-#else
- sigcheck = CANT_CHECK_SIGNATURE;
-#endif
- ND_PRINT((ndo, " (%s)", tok2str(signature_check_values, "Unknown", sigcheck)));
+ sigcheck = signature_verify(ndo, optr, length, tptr + 1,
+ isis_clear_checksum_lifetime,
+ header_lsp);
+ ND_PRINT(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck));
break;
case ISIS_SUBTLV_AUTH_GENERIC:
- key_id = EXTRACT_16BITS((tptr+1));
- ND_PRINT((ndo, "%u, password: ", key_id));
+ ND_TCHECK_2(tptr + 1);
+ key_id = EXTRACT_BE_U_2(tptr + 1);
+ ND_PRINT("%u, password: ", key_id);
for(i=1 + sizeof(uint16_t);i<tlv_len;i++) {
- if (!ND_TTEST2(*(tptr + i), 1))
- goto trunctlv;
- ND_PRINT((ndo, "%02x", *(tptr + i)));
+ ND_TCHECK_1(tptr + i);
+ ND_PRINT("%02x", EXTRACT_U_1(tptr + i));
}
break;
case ISIS_SUBTLV_AUTH_PRIVATE:
case ISIS_TLV_PTP_ADJ:
tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr;
if(tmp>=1) {
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Adjacency State: %s (%u)",
- tok2str(isis_ptp_adjancey_values, "unknown", *tptr),
- *tptr));
+ ND_TCHECK_1(tptr);
+ ND_PRINT("\n\t Adjacency State: %s (%u)",
+ tok2str(isis_ptp_adjancey_values, "unknown", EXTRACT_U_1(tptr)),
+ EXTRACT_U_1(tptr));
tmp--;
}
if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) {
- if (!ND_TTEST2(tlv_ptp_adj->extd_local_circuit_id,
- sizeof(tlv_ptp_adj->extd_local_circuit_id)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Extended Local circuit-ID: 0x%08x",
- EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)));
+ ND_TCHECK_4(tlv_ptp_adj->extd_local_circuit_id);
+ ND_PRINT("\n\t Extended Local circuit-ID: 0x%08x",
+ EXTRACT_BE_U_4(tlv_ptp_adj->extd_local_circuit_id));
tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id);
}
if(tmp>=SYSTEM_ID_LEN) {
- if (!ND_TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Neighbor System-ID: %s",
- isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)));
+ ND_TCHECK_LEN(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t Neighbor System-ID: %s",
+ isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN));
tmp-=SYSTEM_ID_LEN;
}
if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) {
- if (!ND_TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id,
- sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x",
- EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)));
+ ND_TCHECK_4(tlv_ptp_adj->neighbor_extd_local_circuit_id);
+ ND_PRINT("\n\t Neighbor Extended Local circuit-ID: 0x%08x",
+ EXTRACT_BE_U_4(tlv_ptp_adj->neighbor_extd_local_circuit_id));
}
break;
case ISIS_TLV_PROTOCOLS:
- ND_PRINT((ndo, "\n\t NLPID(s): "));
+ ND_PRINT("\n\t NLPID(s): ");
while (tmp>0) {
- if (!ND_TTEST2(*(tptr), 1))
- goto trunctlv;
- ND_PRINT((ndo, "%s (0x%02x)",
+ ND_TCHECK_1(tptr);
+ ND_PRINT("%s (0x%02x)",
tok2str(nlpid_values,
"unknown",
- *tptr),
- *tptr));
+ EXTRACT_U_1(tptr)),
+ EXTRACT_U_1(tptr));
if (tmp>1) /* further NPLIDs ? - put comma */
- ND_PRINT((ndo, ", "));
+ ND_PRINT(", ");
tptr++;
tmp--;
}
case ISIS_TLV_MT_PORT_CAP:
{
- if (!ND_TTEST2(*(tptr), 2))
- goto trunctlv;
+ ND_TCHECK_2(tptr);
- ND_PRINT((ndo, "\n\t RES: %d, MTID(s): %d",
- (EXTRACT_16BITS (tptr) >> 12),
- (EXTRACT_16BITS (tptr) & 0x0fff)));
+ ND_PRINT("\n\t RES: %u, MTID(s): %u",
+ (EXTRACT_BE_U_2(tptr) >> 12),
+ (EXTRACT_BE_U_2(tptr) & 0x0fff));
tmp = tmp-2;
tptr = tptr+2;
case ISIS_TLV_MT_CAPABILITY:
- if (!ND_TTEST2(*(tptr), 2))
- goto trunctlv;
+ ND_TCHECK_2(tptr);
- ND_PRINT((ndo, "\n\t O: %d, RES: %d, MTID(s): %d",
- (EXTRACT_16BITS(tptr) >> 15) & 0x01,
- (EXTRACT_16BITS(tptr) >> 12) & 0x07,
- EXTRACT_16BITS(tptr) & 0x0fff));
+ ND_PRINT("\n\t O: %u, RES: %u, MTID(s): %u",
+ (EXTRACT_BE_U_2(tptr) >> 15) & 0x01,
+ (EXTRACT_BE_U_2(tptr) >> 12) & 0x07,
+ EXTRACT_BE_U_2(tptr) & 0x0fff);
tmp = tmp-2;
tptr = tptr+2;
break;
case ISIS_TLV_TE_ROUTER_ID:
- if (!ND_TTEST2(*pptr, sizeof(struct in_addr)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr)));
+ ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
+ ND_PRINT("\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr));
break;
case ISIS_TLV_IPADDR:
- while (tmp>=sizeof(struct in_addr)) {
- if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
- tptr += sizeof(struct in_addr);
- tmp -= sizeof(struct in_addr);
+ while (tmp>=sizeof(nd_ipv4)) {
+ ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
+ ND_PRINT("\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr));
+ tptr += sizeof(nd_ipv4);
+ tmp -= sizeof(nd_ipv4);
}
break;
case ISIS_TLV_HOSTNAME:
- ND_PRINT((ndo, "\n\t Hostname: "));
- while (tmp>0) {
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
- ND_PRINT((ndo, "%c", *tptr++));
- tmp--;
- }
+ ND_PRINT("\n\t Hostname: ");
+ if (nd_printzp(ndo, tptr, tmp, ndo->ndo_snapend))
+ goto trunc;
break;
case ISIS_TLV_SHARED_RISK_GROUP:
if (tmp < NODE_ID_LEN)
break;
- if (!ND_TTEST2(*tptr, NODE_ID_LEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)));
- tptr+=(NODE_ID_LEN);
- tmp-=(NODE_ID_LEN);
+ ND_TCHECK_LEN(tptr, NODE_ID_LEN);
+ ND_PRINT("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN));
+ tptr+=NODE_ID_LEN;
+ tmp-=NODE_ID_LEN;
if (tmp < 1)
break;
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
- ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"));
+ ND_TCHECK_1(tptr);
+ ND_PRINT(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(EXTRACT_U_1(tptr)) ? "numbered" : "unnumbered");
+ tptr++;
tmp--;
- if (tmp < sizeof(struct in_addr))
+ if (tmp < sizeof(nd_ipv4))
break;
- if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr)));
- tptr+=sizeof(struct in_addr);
- tmp-=sizeof(struct in_addr);
+ ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
+ ND_PRINT("\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr));
+ tptr+=sizeof(nd_ipv4);
+ tmp-=sizeof(nd_ipv4);
- if (tmp < sizeof(struct in_addr))
+ if (tmp < sizeof(nd_ipv4))
break;
- if (!ND_TTEST2(*tptr, sizeof(struct in_addr)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr)));
- tptr+=sizeof(struct in_addr);
- tmp-=sizeof(struct in_addr);
+ ND_TCHECK_LEN(tptr, sizeof(nd_ipv4));
+ ND_PRINT("\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr));
+ tptr+=sizeof(nd_ipv4);
+ tmp-=sizeof(nd_ipv4);
while (tmp>=4) {
- if (!ND_TTEST2(*tptr, 4))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)));
+ ND_TCHECK_4(tptr);
+ ND_PRINT("\n\t Link-ID: 0x%08x", EXTRACT_BE_U_4(tptr));
tptr+=4;
tmp-=4;
}
case ISIS_TLV_LSP:
tlv_lsp = (const struct isis_tlv_lsp *)tptr;
while(tmp>=sizeof(struct isis_tlv_lsp)) {
- if (!ND_TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1]))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t lsp-id: %s",
- isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)));
- if (!ND_TTEST2(tlv_lsp->sequence_number, 4))
- goto trunctlv;
- ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_32BITS(tlv_lsp->sequence_number)));
- if (!ND_TTEST2(tlv_lsp->remaining_lifetime, 2))
- goto trunctlv;
- ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_16BITS(tlv_lsp->remaining_lifetime)));
- if (!ND_TTEST2(tlv_lsp->checksum, 2))
- goto trunctlv;
- ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_16BITS(tlv_lsp->checksum)));
+ ND_TCHECK_1(tlv_lsp->lsp_id + LSP_ID_LEN - 1);
+ ND_PRINT("\n\t lsp-id: %s",
+ isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN));
+ ND_TCHECK_4(tlv_lsp->sequence_number);
+ ND_PRINT(", seq: 0x%08x", EXTRACT_BE_U_4(tlv_lsp->sequence_number));
+ ND_TCHECK_2(tlv_lsp->remaining_lifetime);
+ ND_PRINT(", lifetime: %5ds", EXTRACT_BE_U_2(tlv_lsp->remaining_lifetime));
+ ND_TCHECK_2(tlv_lsp->checksum);
+ ND_PRINT(", chksum: 0x%04x", EXTRACT_BE_U_2(tlv_lsp->checksum));
tmp-=sizeof(struct isis_tlv_lsp);
tlv_lsp++;
}
case ISIS_TLV_CHECKSUM:
if (tmp < ISIS_TLV_CHECKSUM_MINLEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)));
+ ND_TCHECK_LEN(tptr, ISIS_TLV_CHECKSUM_MINLEN);
+ ND_PRINT("\n\t checksum: 0x%04x ", EXTRACT_BE_U_2(tptr));
/* do not attempt to verify the checksum if it is zero
* most likely a HMAC-MD5 TLV is also present and
* to avoid conflicts the checksum TLV is zeroed.
* see rfc3358 for details
*/
- osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, length);
+ osi_print_cksum(ndo, optr, EXTRACT_BE_U_2(tptr), tptr-optr,
+ length);
+ break;
+
+ case ISIS_TLV_POI:
+ if (tlv_len >= SYSTEM_ID_LEN + 1) {
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN + 1);
+ ND_PRINT("\n\t Purge Originator System-ID: %s",
+ isis_print_id(tptr + 1, SYSTEM_ID_LEN));
+ }
+
+ if (tlv_len == 2 * SYSTEM_ID_LEN + 1) {
+ ND_TCHECK_LEN(tptr, 2 * SYSTEM_ID_LEN + 1);
+ ND_PRINT("\n\t Received from System-ID: %s",
+ isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN));
+ }
break;
case ISIS_TLV_MT_SUPPORTED:
if (tmp!=1) {
mt_len = isis_print_mtid(ndo, tptr, "\n\t ");
if (mt_len == 0) /* did something go wrong ? */
- goto trunctlv;
+ goto trunc;
tptr+=mt_len;
tmp-=mt_len;
} else {
- ND_PRINT((ndo, "\n\t malformed MT-ID"));
+ ND_PRINT("\n\t invalid MT-ID");
break;
}
}
/* first attempt to decode the flags */
if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Flags [%s]",
- bittok2str(isis_restart_flag_values, "none", *tptr)));
+ ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN);
+ ND_PRINT("\n\t Flags [%s]",
+ bittok2str(isis_restart_flag_values, "none", EXTRACT_U_1(tptr)));
tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN;
if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN))
- goto trunctlv;
+ ND_TCHECK_LEN(tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN);
- ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_16BITS(tptr)));
+ ND_PRINT(", Remaining holding time %us", EXTRACT_BE_U_2(tptr));
tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN;
/* is there an additional sysid field present ?*/
if (tmp == SYSTEM_ID_LEN) {
- if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
- goto trunctlv;
- ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN)));
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT(", for %s", isis_print_id(tptr,SYSTEM_ID_LEN));
}
break;
case ISIS_TLV_IDRP_INFO:
if (tmp < ISIS_TLV_IDRP_INFO_MINLEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s",
+ ND_TCHECK_LEN(tptr, ISIS_TLV_IDRP_INFO_MINLEN);
+ ND_PRINT("\n\t Inter-Domain Information Type: %s",
tok2str(isis_subtlv_idrp_values,
"Unknown (0x%02x)",
- *tptr)));
- switch (*tptr++) {
+ EXTRACT_U_1(tptr)));
+ isis_subtlv_idrp = EXTRACT_U_1(tptr);
+ tptr++;
+ switch (isis_subtlv_idrp) {
case ISIS_SUBTLV_IDRP_ASN:
- if (!ND_TTEST2(*tptr, 2)) /* fetch AS number */
- goto trunctlv;
- ND_PRINT((ndo, "AS Number: %u", EXTRACT_16BITS(tptr)));
+ ND_TCHECK_2(tptr); /* fetch AS number */
+ ND_PRINT("AS Number: %u", EXTRACT_BE_U_2(tptr));
break;
case ISIS_SUBTLV_IDRP_LOCAL:
case ISIS_SUBTLV_IDRP_RES:
case ISIS_TLV_LSP_BUFFERSIZE:
if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_16BITS(tptr)));
+ ND_TCHECK_LEN(tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN);
+ ND_PRINT("\n\t LSP Buffersize: %u", EXTRACT_BE_U_2(tptr));
break;
case ISIS_TLV_PART_DIS:
while (tmp >= SYSTEM_ID_LEN) {
- if (!ND_TTEST2(*tptr, SYSTEM_ID_LEN))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN)));
+ ND_TCHECK_LEN(tptr, SYSTEM_ID_LEN);
+ ND_PRINT("\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN));
tptr+=SYSTEM_ID_LEN;
tmp-=SYSTEM_ID_LEN;
}
case ISIS_TLV_PREFIX_NEIGH:
if (tmp < sizeof(struct isis_metric_block))
break;
- if (!ND_TTEST2(*tptr, sizeof(struct isis_metric_block)))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Metric Block"));
+ ND_TCHECK_LEN(tptr, sizeof(struct isis_metric_block));
+ ND_PRINT("\n\t Metric Block");
isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr);
tptr+=sizeof(struct isis_metric_block);
tmp-=sizeof(struct isis_metric_block);
while(tmp>0) {
- if (!ND_TTEST2(*tptr, 1))
- goto trunctlv;
- prefix_len=*tptr++; /* read out prefix length in semioctets*/
+ ND_TCHECK_1(tptr);
+ prefix_len=EXTRACT_U_1(tptr); /* read out prefix length in semioctets*/
+ tptr++;
if (prefix_len < 2) {
- ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len));
+ ND_PRINT("\n\t\tAddress: prefix length %u < 2", prefix_len);
break;
}
tmp--;
if (tmp < prefix_len/2)
break;
- if (!ND_TTEST2(*tptr, prefix_len / 2))
- goto trunctlv;
- ND_PRINT((ndo, "\n\t\tAddress: %s/%u",
- isonsap_string(tptr, prefix_len / 2), prefix_len * 4));
+ ND_TCHECK_LEN(tptr, prefix_len / 2);
+ ND_PRINT("\n\t\tAddress: %s/%u",
+ isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4);
tptr+=prefix_len/2;
tmp-=prefix_len/2;
}
case ISIS_TLV_IIH_SEQNR:
if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */
- goto trunctlv;
- ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_32BITS(tptr)));
+ ND_TCHECK_LEN(tptr, ISIS_TLV_IIH_SEQNR_MINLEN); /* check if four bytes are on the wire */
+ ND_PRINT("\n\t Sequence number: %u", EXTRACT_BE_U_4(tptr));
break;
case ISIS_TLV_VENDOR_PRIVATE:
if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN)
break;
- if (!ND_TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */
- goto trunctlv;
- vendor_id = EXTRACT_24BITS(tptr);
- ND_PRINT((ndo, "\n\t Vendor: %s (%u)",
+ ND_TCHECK_LEN(tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN); /* check if enough byte for a full oui */
+ vendor_id = EXTRACT_BE_U_3(tptr);
+ ND_PRINT("\n\t Vendor: %s (%u)",
tok2str(oui_values, "Unknown", vendor_id),
- vendor_id));
+ vendor_id);
tptr+=3;
tmp-=3;
if (tmp > 0) /* hexdump the rest */
}
if (packet_len != 0) {
- ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len));
+ ND_PRINT("\n\t %u straggler bytes", packet_len);
}
return (1);
- trunc:
- ND_PRINT((ndo, "[|isis]"));
+trunc:
+ nd_print_trunc(ndo);
return (1);
-
- trunctlv:
- ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
- return(1);
}
static void
-osi_print_cksum(netdissect_options *ndo,
- const uint8_t *pptr, uint16_t checksum,
- u_int checksum_offset, u_int length)
+osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr,
+ uint16_t checksum, int checksum_offset, u_int length)
{
uint16_t calculated_checksum;
- /* do not attempt to verify the checksum if it is zero */
- if (!checksum) {
- ND_PRINT((ndo, "(unverified)"));
+ /* do not attempt to verify the checksum if it is zero,
+ * if the offset is nonsense,
+ * or the base pointer is not sane
+ */
+ if (!checksum
+ || checksum_offset < 0
+ || !ND_TTEST_2(pptr + checksum_offset)
+ || (u_int)checksum_offset > length
+ || !ND_TTEST_LEN(pptr, length)) {
+ ND_PRINT(" (unverified)");
} else {
+#if 0
+ printf("\nosi_print_cksum: %p %u %u\n", pptr, checksum_offset, length);
+#endif
calculated_checksum = create_osi_cksum(pptr, checksum_offset, length);
if (checksum == calculated_checksum) {
- ND_PRINT((ndo, " (correct)"));
+ ND_PRINT(" (correct)");
} else {
- ND_PRINT((ndo, " (incorrect should be 0x%04x)", calculated_checksum));
+ ND_PRINT(" (incorrect should be 0x%04x)", calculated_checksum);
}
}
}
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */
projects / tcpdump / blobdiff