+static int
+print_icmp_multipart_ext_object(netdissect_options *ndo, const uint8_t *obj_tptr)
+{
+ u_int obj_tlen, obj_class_num, obj_ctype;
+ const struct icmp_multipart_ext_object_header_t *icmp_multipart_ext_object_header;
+
+ icmp_multipart_ext_object_header = (const struct icmp_multipart_ext_object_header_t *)obj_tptr;
+ obj_tlen = GET_BE_U_2(icmp_multipart_ext_object_header->length);
+ obj_class_num = GET_U_1(icmp_multipart_ext_object_header->class_num);
+ obj_ctype = GET_U_1(icmp_multipart_ext_object_header->ctype);
+ obj_tptr += sizeof(struct icmp_multipart_ext_object_header_t);
+
+ ND_PRINT("\n\t %s (%u), Class-Type: %u, length %u",
+ tok2str(icmp_multipart_ext_obj_values,"unknown",obj_class_num),
+ obj_class_num,
+ obj_ctype,
+ obj_tlen);
+
+ /* infinite loop protection */
+ if ((obj_class_num == 0) ||
+ (obj_tlen < sizeof(struct icmp_multipart_ext_object_header_t))) {
+ return -1;
+ }
+ obj_tlen -= sizeof(struct icmp_multipart_ext_object_header_t);
+
+ switch (obj_class_num) {
+ case MPLS_STACK_ENTRY_OBJECT_CLASS:
+ switch(obj_ctype) {
+ case 1:
+ {
+ uint32_t raw_label;
+
+ raw_label = GET_BE_U_4(obj_tptr);
+ ND_PRINT("\n\t label %u, tc %u", MPLS_LABEL(raw_label), MPLS_TC(raw_label));
+ if (MPLS_STACK(raw_label))
+ ND_PRINT(", [S]");
+ ND_PRINT(", ttl %u", MPLS_TTL(raw_label));
+ break;
+ }
+ default:
+ print_unknown_data(ndo, obj_tptr, "\n\t ", obj_tlen);
+ }
+ break;
+
+ case INTERFACE_INFORMATION_OBJECT_CLASS:
+ {
+ /*
+ Ctype in a INTERFACE_INFORMATION_OBJECT_CLASS object:
+
+ Bit 0 1 2 3 4 5 6 7
+ +-------+-------+-------+-------+-------+-------+-------+-------+
+ | Interface Role| Rsvd1 | Rsvd2 |ifIndex| IPAddr| name | MTU |
+ +-------+-------+-------+-------+-------+-------+-------+-------+
+ */
+ const uint8_t *offset;
+ u_int interface_role, if_index_flag, ipaddr_flag, name_flag, mtu_flag;
+
+ interface_role = (obj_ctype & 0xc0) >> 6;
+ if_index_flag = (obj_ctype & 0x8) >> 3;
+ ipaddr_flag = (obj_ctype & 0x4) >> 2;
+ name_flag = (obj_ctype & 0x2) >> 1;
+ mtu_flag = (obj_ctype & 0x1);
+
+ ND_PRINT("\n\t Interface Role: %s",
+ tok2str(icmp_interface_information_role_values,
+ "an unknown interface role",interface_role));
+
+ offset = obj_tptr;
+
+ if (if_index_flag) {
+ ND_PRINT("\n\t Interface Index: %u", GET_BE_U_4(offset));
+ offset += 4;
+ }
+ if (ipaddr_flag) {
+ const struct icmp_interface_information_ipaddr_subobject_t *ipaddr_subobj;
+
+ ND_PRINT("\n\t IP Address sub-object: ");
+ ipaddr_subobj = (const struct icmp_interface_information_ipaddr_subobject_t *) offset;
+ switch (GET_BE_U_2(ipaddr_subobj->afi)) {
+ case 1:
+ ND_PRINT("%s", GET_IPADDR_STRING(ipaddr_subobj->ip_addr));
+ offset += 4;
+ break;
+ case 2:
+ ND_PRINT("%s", GET_IP6ADDR_STRING(ipaddr_subobj->ip_addr));
+ offset += 16;
+ break;
+ default:
+ ND_PRINT("Unknown Address Family Identifier");
+ return -1;
+ }
+ offset += 4;
+ }
+ if (name_flag) {
+ uint8_t inft_name_length_field;
+ const struct icmp_interface_information_ifname_subobject_t *ifname_subobj;
+
+ ifname_subobj = (const struct icmp_interface_information_ifname_subobject_t *) offset;
+ inft_name_length_field = GET_U_1(ifname_subobj->length);
+ ND_PRINT("\n\t Interface Name");
+ if (inft_name_length_field == 0) {
+ ND_PRINT(" [length %u]", inft_name_length_field);
+ nd_print_invalid(ndo);
+ break;
+ }
+ if (inft_name_length_field % 4 != 0) {
+ ND_PRINT(" [length %u != N x 4]", inft_name_length_field);
+ nd_print_invalid(ndo);
+ offset += inft_name_length_field;
+ break;
+ }
+ if (inft_name_length_field > 64) {
+ ND_PRINT(" [length %u > 64]", inft_name_length_field);
+ nd_print_invalid(ndo);
+ offset += inft_name_length_field;
+ break;
+ }
+ ND_PRINT(", length %u: ", inft_name_length_field);
+ nd_printjnp(ndo, ifname_subobj->if_name,
+ inft_name_length_field - 1);
+ offset += inft_name_length_field;
+ }
+ if (mtu_flag) {
+ ND_PRINT("\n\t MTU: %u", GET_BE_U_4(offset));
+ offset += 4;
+ }
+ break;
+ }
+
+ case INTERFACE_IDENTIFICATION_OBJECT_CLASS:
+ switch (obj_ctype) {
+ case 1:
+ ND_PRINT("\n\t Interface Name, length %d: ", obj_tlen);
+ nd_printjnp(ndo, obj_tptr, obj_tlen);
+ break;
+ case 2:
+ ND_PRINT("\n\t Interface Index: %u", GET_BE_U_4(obj_tptr));
+ break;
+ case 3:
+ {
+ const struct icmp_interface_identification_ipaddr_subobject_t *id_ipaddr_subobj;
+ ND_PRINT("\n\t IP Address sub-object: ");
+ id_ipaddr_subobj = (const struct icmp_interface_identification_ipaddr_subobject_t *) obj_tptr;
+ switch (GET_BE_U_2(id_ipaddr_subobj->afi)) {
+ case 1:
+ if (GET_U_1(id_ipaddr_subobj->addrlen) != 4) {
+ ND_PRINT("[length %d != 4] ", GET_U_1(id_ipaddr_subobj->addrlen));
+ }
+ ND_PRINT("%s", GET_IPADDR_STRING(id_ipaddr_subobj->ip_addr));
+ break;
+ case 2:
+ if (GET_U_1(id_ipaddr_subobj->addrlen) != 16) {
+ ND_PRINT("[length %d != 16] ", GET_U_1(id_ipaddr_subobj->addrlen));
+ }
+ ND_PRINT("%s", GET_IP6ADDR_STRING(id_ipaddr_subobj->ip_addr));
+ break;
+ default:
+ ND_PRINT("Unknown Address Family Identifier");
+ return -1;
+ }
+ break;
+ }
+ default:
+ print_unknown_data(ndo, obj_tptr, "\n\t ", obj_tlen);
+ break;
+ }
+ break;
+
+ default:
+ print_unknown_data(ndo, obj_tptr, "\n\t ", obj_tlen);
+ break;
+ }
+ return obj_tlen + sizeof(struct icmp_multipart_ext_object_header_t);
+}
+
+void
+print_icmp_rfc8335(netdissect_options *ndo, uint8_t xinfo, int isrequest, uint8_t icmp_code, const uint8_t *data) {
+ struct cksum_vec vec[1];
+
+ if (isrequest) {
+ ND_PRINT("\n\t%s Interface", xinfo & 1 ? "Local" : "Remote");
+ if (ICMP_EXT_EXTRACT_VERSION(GET_U_1(data)) != ICMP_EXT_VERSION) {
+ nd_print_invalid(ndo);
+ } else {
+ // A single extended object. The extended header is not
+ // located at offset 128 in this case, so we can not use
+ // icmp_ext_checksum.
+ uint16_t sum = GET_BE_U_2(data + 2);
+ uint16_t len = GET_BE_U_2(data + 4);
+ // The checksum is over the extended header and the single
+ // object
+ len += 4;
+ vec[0].ptr = data;
+ vec[0].len = len;
+ if (ND_TTEST_LEN(vec[0].ptr, vec[0].len)) {
+ ND_PRINT(", checksum 0x%04x (%scorrect), length %u",
+ sum,
+ in_cksum(vec, 1) ? "in" : "",
+ len);
+ }
+ print_icmp_multipart_ext_object(ndo, data + 4);
+ }
+ } else {
+ int state = ( xinfo & 0xe0 ) >> 5;
+ ND_PRINT("\n\tCode %d (%s), State %d (%s), active %d ipv4 %d ipv6 %d",
+ icmp_code, tok2str(icmp_extended_echo_reply_code_str, "Unknown", icmp_code),
+ state, tok2str(icmp_extended_echo_reply_state_str, "Unknown", state),
+ xinfo & 4 ? 1 : 0,
+ xinfo & 2 ? 1 : 0,
+ xinfo & 1 ? 1 : 0);
+ }
+}
+
projects / tcpdump / blobdiff