/* \summary: Open Shortest Path First (OSPF) printer */
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include "netdissect-stdinc.h"
#include "ospf.h"
-
static const struct tok ospf_option_values[] = {
{ OSPF_OPTION_MT, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */
{ OSPF_OPTION_E, "External" },
{ 0, NULL}
};
-
static const struct tok lsa_opaque_ep_route_type_values[] = {
{ 0, "Unspecified" },
{ 1, "Intra-Area" },
{
u_int tlv_type, tlv_length;
-
- while (ls_length > 0) {
+ while (ls_length != 0) {
ND_TCHECK_4(tptr);
if (ls_length < 4) {
ND_PRINT("\n\t Remaining LS length %u < 4", ls_length);
}
/* in OSPF everything has to be 32-bit aligned, including TLVs */
- if (tlv_length%4 != 0)
+ if (tlv_length%4 != 0) {
tlv_length+=4-(tlv_length%4);
+ if (tlv_length > ls_length) {
+ ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
+ ls_length);
+ return -1;
+ }
+ }
ls_length-=tlv_length;
tptr+=tlv_length;
}
return 0;
trunc:
+ nd_print_trunc(ndo);
+ return -1;
+}
+
+static int
+ospf_te_tlv_link_print(netdissect_options *ndo,
+ const u_char *tptr, u_int tlv_length)
+{
+ u_int subtlv_type, subtlv_length;
+ u_int priority_level, te_class, count_srlg;
+
+ while (tlv_length != 0) {
+ if (tlv_length < 4) {
+ ND_PRINT("\n\t Remaining TLV length %u < 4",
+ tlv_length);
+ return -1;
+ }
+ subtlv_type = GET_BE_U_2(tptr);
+ subtlv_length = GET_BE_U_2(tptr + 2);
+ tptr+=4;
+ tlv_length-=4;
+
+ /* Infinite loop protection */
+ if (subtlv_type == 0 || subtlv_length == 0)
+ goto invalid;
+
+ ND_PRINT("\n\t %s subTLV (%u), length: %u",
+ tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
+ subtlv_type,
+ subtlv_length);
+
+ if (tlv_length < subtlv_length) {
+ ND_PRINT("\n\t Remaining TLV length %u < %u",
+ tlv_length, subtlv_length);
+ return -1;
+ }
+ ND_TCHECK_LEN(tptr, subtlv_length);
+ switch(subtlv_type) {
+ case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
+ if (subtlv_length != 4) {
+ ND_PRINT(" != 4");
+ goto invalid;
+ }
+ ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
+ if (subtlv_length != 4 && subtlv_length != 8) {
+ ND_PRINT(" != 4 && != 8");
+ goto invalid;
+ }
+ ND_PRINT(", %s (0x%08x)",
+ GET_IPADDR_STRING(tptr),
+ GET_BE_U_4(tptr));
+ if (subtlv_length == 8) /* rfc4203 */
+ ND_PRINT(", %s (0x%08x)",
+ GET_IPADDR_STRING(tptr+4),
+ GET_BE_U_4(tptr + 4));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
+ case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
+ if (subtlv_length != 4) {
+ ND_PRINT(" != 4");
+ goto invalid;
+ }
+ ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
+ case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
+ if (subtlv_length != 4) {
+ ND_PRINT(" != 4");
+ goto invalid;
+ }
+ ND_PRINT(", %.3f Mbps", GET_BE_F_4(tptr) * 8 / 1000000);
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
+ if (subtlv_length != 32) {
+ ND_PRINT(" != 32");
+ goto invalid;
+ }
+ for (te_class = 0; te_class < 8; te_class++) {
+ ND_PRINT("\n\t\tTE-Class %u: %.3f Mbps",
+ te_class,
+ GET_BE_F_4(tptr + te_class * 4) * 8 / 1000000);
+ }
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
+ if (subtlv_length < 4) {
+ ND_PRINT(" < 4");
+ goto invalid;
+ }
+ /* BC Model Id (1 octet) + Reserved (3 octets) */
+ ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)",
+ tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
+ GET_U_1(tptr));
+ if (subtlv_length % 4 != 0) {
+ ND_PRINT("\n\t\tlength %u != N x 4", subtlv_length);
+ goto invalid;
+ }
+ if (subtlv_length > 36) {
+ ND_PRINT("\n\t\tlength %u > 36", subtlv_length);
+ goto invalid;
+ }
+ /* decode BCs until the subTLV ends */
+ for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
+ ND_PRINT("\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
+ te_class,
+ GET_BE_F_4(tptr + 4 + te_class * 4) * 8 / 1000000);
+ }
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
+ if (subtlv_length != 4) {
+ ND_PRINT(" != 4");
+ goto invalid;
+ }
+ ND_PRINT(", Metric %u", GET_BE_U_4(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
+ /* Protection Cap (1 octet) + Reserved ((3 octets) */
+ if (subtlv_length != 4) {
+ ND_PRINT(" != 4");
+ goto invalid;
+ }
+ ND_PRINT(", %s",
+ bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
+ if (subtlv_length < 36) {
+ ND_PRINT(" < 36");
+ goto invalid;
+ }
+ /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */
+ ND_PRINT("\n\t\tInterface Switching Capability: %s",
+ tok2str(gmpls_switch_cap_values, "Unknown", GET_U_1((tptr))));
+ ND_PRINT("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
+ tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
+ for (priority_level = 0; priority_level < 8; priority_level++) {
+ ND_PRINT("\n\t\t priority level %u: %.3f Mbps",
+ priority_level,
+ GET_BE_F_4(tptr + 4 + (priority_level * 4)) * 8 / 1000000);
+ }
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
+ if (subtlv_length != 1) {
+ ND_PRINT(" != 1");
+ goto invalid;
+ }
+ ND_PRINT(", %s (%u)",
+ tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",GET_U_1(tptr)),
+ GET_U_1(tptr));
+ break;
+ case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
+ if (subtlv_length % 4 != 0) {
+ ND_PRINT(" != N x 4");
+ goto invalid;
+ }
+ count_srlg = subtlv_length / 4;
+ if (count_srlg != 0)
+ ND_PRINT("\n\t\t Shared risk group: ");
+ while (count_srlg != 0) {
+ ND_PRINT("%u", GET_BE_U_4(tptr));
+ tptr+=4;
+ count_srlg--;
+ if (count_srlg > 0)
+ ND_PRINT(", ");
+ }
+ break;
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
+ return -1;
+ }
+ break;
+ }
+ /* in OSPF everything has to be 32-bit aligned, including subTLVs */
+ if (subtlv_length%4 != 0) {
+ subtlv_length+=4-(subtlv_length%4);
+
+ if (tlv_length < subtlv_length) {
+ ND_PRINT("\n\t Remaining TLV length %u < %u",
+ tlv_length, subtlv_length);
+ return -1;
+ }
+ }
+ tlv_length-=subtlv_length;
+ tptr+=subtlv_length;
+ }
+ return 0;
+trunc:
+ nd_print_trunc(ndo);
+ return -1;
+invalid:
+ nd_print_invalid(ndo);
return -1;
}
ospf_te_lsa_print(netdissect_options *ndo,
const u_char *tptr, u_int ls_length)
{
- u_int tlv_type, tlv_length, subtlv_type, subtlv_length;
- u_int priority_level, te_class, count_srlg;
- union { /* int to float conversion buffer for several subTLVs */
- float f;
- uint32_t i;
- } bw;
+ u_int tlv_type, tlv_length;
while (ls_length != 0) {
ND_TCHECK_4(tptr);
if (tlv_length > ls_length) {
ND_PRINT("\n\t Bogus length %u > %u", tlv_length,
ls_length);
- return -1;
+ goto invalid;
}
/* Infinite loop protection. */
if (tlv_type == 0 || tlv_length ==0) {
nd_print_invalid(ndo);
- return -1;
+ goto invalid;
}
switch(tlv_type) {
case LS_OPAQUE_TE_TLV_LINK:
- while (tlv_length != 0) {
- if (tlv_length < 4) {
- ND_PRINT("\n\t Remaining TLV length %u < 4",
- tlv_length);
- return -1;
- }
- subtlv_type = GET_BE_U_2(tptr);
- subtlv_length = GET_BE_U_2(tptr + 2);
- tptr+=4;
- tlv_length-=4;
-
- /* Infinite loop protection */
- if (subtlv_type == 0 || subtlv_length == 0)
- goto invalid;
-
- ND_PRINT("\n\t %s subTLV (%u), length: %u",
- tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type),
- subtlv_type,
- subtlv_length);
-
- if (tlv_length < subtlv_length) {
- ND_PRINT("\n\t Remaining TLV length %u < %u",
- tlv_length + 4, subtlv_length + 4);
- return -1;
- }
- ND_TCHECK_LEN(tptr, subtlv_length);
- switch(subtlv_type) {
- case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP:
- if (subtlv_length != 4) {
- ND_PRINT(" != 4");
- goto invalid;
- }
- ND_PRINT(", 0x%08x", GET_BE_U_4(tptr));
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID:
- case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID:
- if (subtlv_length != 4 && subtlv_length != 8) {
- ND_PRINT(" != 4 && != 8");
- goto invalid;
- }
- ND_PRINT(", %s (0x%08x)",
- GET_IPADDR_STRING(tptr),
- GET_BE_U_4(tptr));
- if (subtlv_length == 8) /* rfc4203 */
- ND_PRINT(", %s (0x%08x)",
- GET_IPADDR_STRING(tptr+4),
- GET_BE_U_4(tptr + 4));
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP:
- case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP:
- if (subtlv_length != 4) {
- ND_PRINT(" != 4");
- goto invalid;
- }
- ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW:
- case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW:
- if (subtlv_length != 4) {
- ND_PRINT(" != 4");
- goto invalid;
- }
- bw.i = GET_BE_U_4(tptr);
- ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000);
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW:
- if (subtlv_length != 32) {
- ND_PRINT(" != 32");
- goto invalid;
- }
- for (te_class = 0; te_class < 8; te_class++) {
- bw.i = GET_BE_U_4(tptr + te_class * 4);
- ND_PRINT("\n\t\tTE-Class %u: %.3f Mbps",
- te_class,
- bw.f * 8 / 1000000);
- }
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS:
- if (subtlv_length < 4) {
- ND_PRINT(" < 4");
- goto invalid;
- }
- /* BC Model Id (1 octet) + Reserved (3 octets) */
- ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)",
- tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)),
- GET_U_1(tptr));
- if (subtlv_length % 4 != 0) {
- ND_PRINT("\n\t\tlength %u != N x 4", subtlv_length);
- goto invalid;
- }
- if (subtlv_length > 36) {
- ND_PRINT("\n\t\tlength %u > 36", subtlv_length);
- goto invalid;
- }
- /* decode BCs until the subTLV ends */
- for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) {
- bw.i = GET_BE_U_4(tptr + 4 + te_class * 4);
- ND_PRINT("\n\t\t Bandwidth constraint CT%u: %.3f Mbps",
- te_class,
- bw.f * 8 / 1000000);
- }
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC:
- if (subtlv_length != 4) {
- ND_PRINT(" != 4");
- goto invalid;
- }
- ND_PRINT(", Metric %u", GET_BE_U_4(tptr));
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE:
- /* Protection Cap (1 octet) + Reserved ((3 octets) */
- if (subtlv_length != 4) {
- ND_PRINT(" != 4");
- goto invalid;
- }
- ND_PRINT(", %s",
- bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr)));
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR:
- if (subtlv_length < 36) {
- ND_PRINT(" < 36");
- goto invalid;
- }
- /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */
- ND_PRINT("\n\t\tInterface Switching Capability: %s",
- tok2str(gmpls_switch_cap_values, "Unknown", GET_U_1((tptr))));
- ND_PRINT("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:",
- tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1))));
- for (priority_level = 0; priority_level < 8; priority_level++) {
- bw.i = GET_BE_U_4(tptr + 4 + (priority_level * 4));
- ND_PRINT("\n\t\t priority level %u: %.3f Mbps",
- priority_level,
- bw.f * 8 / 1000000);
- }
- break;
- case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE:
- if (subtlv_length != 1) {
- ND_PRINT(" != 1");
- goto invalid;
- }
- ND_PRINT(", %s (%u)",
- tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",GET_U_1(tptr)),
- GET_U_1(tptr));
- break;
-
- case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP:
- if (subtlv_length % 4 != 0) {
- ND_PRINT(" != N x 4");
- goto invalid;
- }
- count_srlg = subtlv_length / 4;
- if (count_srlg != 0)
- ND_PRINT("\n\t\t Shared risk group: ");
- while (count_srlg > 0) {
- bw.i = GET_BE_U_4(tptr);
- ND_PRINT("%u", bw.i);
- tptr+=4;
- count_srlg--;
- if (count_srlg > 0)
- ND_PRINT(", ");
- }
- break;
-
- default:
- if (ndo->ndo_vflag <= 1) {
- if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length))
- return -1;
- }
- break;
- }
- /* in OSPF everything has to be 32-bit aligned, including subTLVs */
- if (subtlv_length%4 != 0)
- subtlv_length+=4-(subtlv_length%4);
-
- if (tlv_length < subtlv_length) {
- ND_PRINT("\n\t Remaining TLV length %u < %u",
- tlv_length + 4, subtlv_length + 4);
- return -1;
- }
- tlv_length-=subtlv_length;
- tptr+=subtlv_length;
-
- }
+ if (ospf_te_tlv_link_print(ndo, tptr, tlv_length) == -1)
+ return -1;
break;
case LS_OPAQUE_TE_TLV_ROUTER:
if (tlv_length < 4) {
ND_PRINT("\n\t TLV length %u < 4", tlv_length);
- return -1;
+ goto invalid;
}
ND_PRINT(", %s", GET_IPADDR_STRING(tptr));
break;
default:
if (ndo->ndo_vflag <= 1) {
if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length))
- return -1;
+ goto invalid;
}
break;
}
/* in OSPF everything has to be 32-bit aligned, including TLVs */
- if (tlv_length%4 != 0)
+ if (tlv_length%4 != 0) {
tlv_length+=4-(tlv_length%4);
- if (tlv_length > ls_length) {
- ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
- ls_length);
- return -1;
+ if (tlv_length > ls_length) {
+ ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
+ ls_length);
+ goto invalid;
+ }
}
ls_length-=tlv_length;
tptr+=tlv_length;
}
return 0;
trunc:
+ nd_print_trunc(ndo);
return -1;
invalid:
nd_print_invalid(ndo);
subtlv_type,
subtlv_length);
+ if (tlv_length < subtlv_length) {
+ ND_PRINT("\n\t Remaining TLV length %u < %u",
+ tlv_length, subtlv_length);
+ return -1;
+ }
+
switch (subtlv_type) {
case LS_OPAQUE_RI_SUBTLV_SID_LABEL:
if (subtlv_length == 3) {
/* in OSPF everything has to be 32-bit aligned, including subTLVs */
if (subtlv_length % 4) {
subtlv_length += (4 - (subtlv_length % 4));
+ if (tlv_length < subtlv_length) {
+ ND_PRINT("\n\t Remaining TLV length %u < %u",
+ tlv_length, subtlv_length);
+ return -1;
+ }
}
tptr+=subtlv_length;
tlv_length-=subtlv_length;
subtlv_type,
subtlv_length);
+ if (tlv_length < subtlv_length) {
+ ND_PRINT("\n\t Remaining TLV length %u < %u",
+ tlv_length, subtlv_length);
+ return -1;
+ }
+
switch (subtlv_type) {
case LS_OPAQUE_EP_SUBTLV_PREFIX_SID:
flags = GET_U_1(tptr);
/* in OSPF everything has to be 32-bit aligned, including subTLVs */
if (subtlv_length % 4) {
subtlv_length += (4 - (subtlv_length % 4));
+ if (tlv_length < subtlv_length) {
+ ND_PRINT("\n\t Remaining TLV length %u < %u",
+ tlv_length, subtlv_length);
+ return -1;
+ }
}
tptr+=subtlv_length;
tlv_length-=subtlv_length;
tlv_type,
tlv_length);
+ if (tlv_length > lsa_length) {
+ ND_PRINT("\n\t Bogus length %u > %u",
+ tlv_length, lsa_length);
+ return -1;
+ }
+
switch (tlv_type) {
case LS_OPAQUE_EP_EXTD_PREFIX_TLV:
prefix_length = GET_U_1(tptr+1);
/* in OSPF everything has to be 32-bit aligned, including TLVs */
if (tlv_length % 4) {
tlv_length += (4 - (tlv_length % 4));
+ if (tlv_length > lsa_length) {
+ ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
+ lsa_length);
+ return -1;
+ }
}
tptr+=tlv_length;
lsa_length-=tlv_length;
/* in OSPF everything has to be 32-bit aligned, including TLVs */
if (tlv_length % 4) {
tlv_length += (4 - (tlv_length % 4));
+ if (tlv_length > ls_length_remaining) {
+ ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length,
+ ls_length_remaining);
+ return(NULL);
+ }
}
tptr+=tlv_length;
ls_length_remaining-=tlv_length;
return (ls_end);
trunc:
+ nd_print_trunc(ndo);
return (NULL);
}
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