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-rw-r--r--print-hncp.c866
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diff --git a/print-hncp.c b/print-hncp.c
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+/*
+ * Copyright (c) 2016 Antonin Décimo, Jean-Raphaël Gaglione
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* \summary: Home Networking Control Protocol (HNCP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include <string.h>
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+static void
+hncp_print_rec(netdissect_options *ndo,
+ const u_char *cp, u_int length, int indent);
+
+void
+hncp_print(netdissect_options *ndo,
+ const u_char *cp, u_int length)
+{
+ ndo->ndo_protocol = "hncp";
+ ND_PRINT("hncp (%u)", length);
+ hncp_print_rec(ndo, cp, length, 1);
+}
+
+/* RFC7787 */
+#define DNCP_REQUEST_NETWORK_STATE 1
+#define DNCP_REQUEST_NODE_STATE 2
+#define DNCP_NODE_ENDPOINT 3
+#define DNCP_NETWORK_STATE 4
+#define DNCP_NODE_STATE 5
+#define DNCP_PEER 8
+#define DNCP_KEEP_ALIVE_INTERVAL 9
+#define DNCP_TRUST_VERDICT 10
+
+/* RFC7788 */
+#define HNCP_HNCP_VERSION 32
+#define HNCP_EXTERNAL_CONNECTION 33
+#define HNCP_DELEGATED_PREFIX 34
+#define HNCP_PREFIX_POLICY 43
+#define HNCP_DHCPV4_DATA 37 /* This is correct, see RFC 7788 Errata ID 5113. */
+#define HNCP_DHCPV6_DATA 38 /* idem */
+#define HNCP_ASSIGNED_PREFIX 35
+#define HNCP_NODE_ADDRESS 36
+#define HNCP_DNS_DELEGATED_ZONE 39
+#define HNCP_DOMAIN_NAME 40
+#define HNCP_NODE_NAME 41
+#define HNCP_MANAGED_PSK 42
+
+/* See type_mask in hncp_print_rec below */
+#define RANGE_DNCP_RESERVED 0x10000
+#define RANGE_HNCP_UNASSIGNED 0x10001
+#define RANGE_DNCP_PRIVATE_USE 0x10002
+#define RANGE_DNCP_FUTURE_USE 0x10003
+
+static const struct tok type_values[] = {
+ { DNCP_REQUEST_NETWORK_STATE, "Request network state" },
+ { DNCP_REQUEST_NODE_STATE, "Request node state" },
+ { DNCP_NODE_ENDPOINT, "Node endpoint" },
+ { DNCP_NETWORK_STATE, "Network state" },
+ { DNCP_NODE_STATE, "Node state" },
+ { DNCP_PEER, "Peer" },
+ { DNCP_KEEP_ALIVE_INTERVAL, "Keep-alive interval" },
+ { DNCP_TRUST_VERDICT, "Trust-Verdict" },
+
+ { HNCP_HNCP_VERSION, "HNCP-Version" },
+ { HNCP_EXTERNAL_CONNECTION, "External-Connection" },
+ { HNCP_DELEGATED_PREFIX, "Delegated-Prefix" },
+ { HNCP_PREFIX_POLICY, "Prefix-Policy" },
+ { HNCP_DHCPV4_DATA, "DHCPv4-Data" },
+ { HNCP_DHCPV6_DATA, "DHCPv6-Data" },
+ { HNCP_ASSIGNED_PREFIX, "Assigned-Prefix" },
+ { HNCP_NODE_ADDRESS, "Node-Address" },
+ { HNCP_DNS_DELEGATED_ZONE, "DNS-Delegated-Zone" },
+ { HNCP_DOMAIN_NAME, "Domain-Name" },
+ { HNCP_NODE_NAME, "Node-Name" },
+ { HNCP_MANAGED_PSK, "Managed-PSK" },
+
+ { RANGE_DNCP_RESERVED, "Reserved" },
+ { RANGE_HNCP_UNASSIGNED, "Unassigned" },
+ { RANGE_DNCP_PRIVATE_USE, "Private use" },
+ { RANGE_DNCP_FUTURE_USE, "Future use" },
+
+ { 0, NULL}
+};
+
+#define DH4OPT_DNS_SERVERS 6 /* RFC2132 */
+#define DH4OPT_NTP_SERVERS 42 /* RFC2132 */
+#define DH4OPT_DOMAIN_SEARCH 119 /* RFC3397 */
+
+static const struct tok dh4opt_str[] = {
+ { DH4OPT_DNS_SERVERS, "DNS-server" },
+ { DH4OPT_NTP_SERVERS, "NTP-server"},
+ { DH4OPT_DOMAIN_SEARCH, "DNS-search" },
+ { 0, NULL }
+};
+
+#define DH6OPT_DNS_SERVERS 23 /* RFC3646 */
+#define DH6OPT_DOMAIN_LIST 24 /* RFC3646 */
+#define DH6OPT_SNTP_SERVERS 31 /* RFC4075 */
+
+static const struct tok dh6opt_str[] = {
+ { DH6OPT_DNS_SERVERS, "DNS-server" },
+ { DH6OPT_DOMAIN_LIST, "DNS-search-list" },
+ { DH6OPT_SNTP_SERVERS, "SNTP-servers" },
+ { 0, NULL }
+};
+
+/*
+ * For IPv4-mapped IPv6 addresses, length of the prefix that precedes
+ * the 4 bytes of IPv4 address at the end of the IPv6 address.
+ */
+#define IPV4_MAPPED_HEADING_LEN 12
+
+/*
+ * Is an IPv6 address an IPv4-mapped address?
+ */
+static int
+is_ipv4_mapped_address(const u_char *addr)
+{
+ /* The value of the prefix */
+ static const u_char ipv4_mapped_heading[IPV4_MAPPED_HEADING_LEN] =
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF };
+
+ return memcmp(addr, ipv4_mapped_heading, IPV4_MAPPED_HEADING_LEN) == 0;
+}
+
+static const char *
+format_nid(netdissect_options *ndo, const u_char *data)
+{
+ static char buf[4][sizeof("01:01:01:01")];
+ static int i = 0;
+ i = (i + 1) % 4;
+ snprintf(buf[i], sizeof(buf[i]), "%02x:%02x:%02x:%02x",
+ GET_U_1(data), GET_U_1(data + 1), GET_U_1(data + 2),
+ GET_U_1(data + 3));
+ return buf[i];
+}
+
+static const char *
+format_256(netdissect_options *ndo, const u_char *data)
+{
+ static char buf[4][sizeof("0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef")];
+ static int i = 0;
+ i = (i + 1) % 4;
+ snprintf(buf[i], sizeof(buf[i]), "%016" PRIx64 "%016" PRIx64 "%016" PRIx64 "%016" PRIx64,
+ GET_BE_U_8(data),
+ GET_BE_U_8(data + 8),
+ GET_BE_U_8(data + 16),
+ GET_BE_U_8(data + 24)
+ );
+ return buf[i];
+}
+
+static const char *
+format_interval(const uint32_t n)
+{
+ static char buf[4][sizeof("0000000.000s")];
+ static int i = 0;
+ i = (i + 1) % 4;
+ snprintf(buf[i], sizeof(buf[i]), "%u.%03us", n / 1000, n % 1000);
+ return buf[i];
+}
+
+static const char *
+format_ip6addr(netdissect_options *ndo, const u_char *cp)
+{
+ if (is_ipv4_mapped_address(cp))
+ return GET_IPADDR_STRING(cp + IPV4_MAPPED_HEADING_LEN);
+ else
+ return GET_IP6ADDR_STRING(cp);
+}
+
+static int
+print_prefix(netdissect_options *ndo, const u_char *prefix, u_int max_length)
+{
+ int plenbytes;
+ char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx::/128")];
+
+ if (GET_U_1(prefix) >= 96 && max_length >= IPV4_MAPPED_HEADING_LEN + 1 &&
+ is_ipv4_mapped_address(prefix + 1)) {
+ nd_ipv4 addr;
+ u_int plen;
+
+ plen = GET_U_1(prefix) - 96;
+ if (32 < plen)
+ return -1;
+ max_length -= 1;
+
+ memset(&addr, 0, sizeof(addr));
+ plenbytes = (plen + 7) / 8;
+ if (max_length < (u_int)plenbytes + IPV4_MAPPED_HEADING_LEN)
+ return -3;
+ memcpy(&addr, prefix + IPV4_MAPPED_HEADING_LEN + 1, plenbytes);
+ if (plen % 8) {
+ ((u_char *)&addr)[plenbytes - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ snprintf(buf, sizeof(buf), "%s/%u", ipaddr_string(ndo, (const u_char *)&addr), plen); /* local buffer, not packet data; don't use GET_IPADDR_STRING() */
+ plenbytes += 1 + IPV4_MAPPED_HEADING_LEN;
+ } else {
+ plenbytes = decode_prefix6(ndo, prefix, max_length, buf, sizeof(buf));
+ if (plenbytes < 0)
+ return plenbytes;
+ }
+
+ ND_PRINT("%s", buf);
+ return plenbytes;
+}
+
+static int
+print_dns_label(netdissect_options *ndo,
+ const u_char *cp, u_int max_length, int print)
+{
+ u_int length = 0;
+ while (length < max_length) {
+ u_int lab_length = GET_U_1(cp + length);
+ length++;
+ if (lab_length == 0)
+ return (int)length;
+ if (length > 1 && print)
+ ND_PRINT(".");
+ if (length+lab_length > max_length) {
+ if (print)
+ nd_printjnp(ndo, cp+length, max_length-length);
+ break;
+ }
+ if (print)
+ nd_printjnp(ndo, cp+length, lab_length);
+ length += lab_length;
+ }
+ if (print)
+ ND_PRINT("[|DNS]");
+ return -1;
+}
+
+static int
+dhcpv4_print(netdissect_options *ndo,
+ const u_char *cp, u_int length, int indent)
+{
+ u_int i, t;
+ const uint8_t *tlv, *value;
+ uint8_t type, optlen;
+
+ i = 0;
+ while (i < length) {
+ if (i + 2 > length)
+ return -1;
+ tlv = cp + i;
+ type = GET_U_1(tlv);
+ optlen = GET_U_1(tlv + 1);
+ value = tlv + 2;
+
+ ND_PRINT("\n");
+ for (t = indent; t > 0; t--)
+ ND_PRINT("\t");
+
+ ND_PRINT("%s", tok2str(dh4opt_str, "Unknown", type));
+ ND_PRINT(" (%u)", optlen + 2 );
+ if (i + 2 + optlen > length)
+ return -1;
+
+ switch (type) {
+ case DH4OPT_DNS_SERVERS:
+ case DH4OPT_NTP_SERVERS: {
+ if (optlen < 4 || optlen % 4 != 0) {
+ return -1;
+ }
+ for (t = 0; t < optlen; t += 4)
+ ND_PRINT(" %s", GET_IPADDR_STRING(value + t));
+ }
+ break;
+ case DH4OPT_DOMAIN_SEARCH: {
+ const u_char *tp = value;
+ while (tp < value + optlen) {
+ ND_PRINT(" ");
+ if ((tp = fqdn_print(ndo, tp, value + optlen)) == NULL)
+ return -1;
+ }
+ }
+ break;
+ }
+
+ i += 2 + optlen;
+ }
+ return 0;
+}
+
+static int
+dhcpv6_print(netdissect_options *ndo,
+ const u_char *cp, u_int length, int indent)
+{
+ u_int i, t;
+ const u_char *tlv, *value;
+ uint16_t type, optlen;
+
+ i = 0;
+ while (i < length) {
+ if (i + 4 > length)
+ return -1;
+ tlv = cp + i;
+ type = GET_BE_U_2(tlv);
+ optlen = GET_BE_U_2(tlv + 2);
+ value = tlv + 4;
+
+ ND_PRINT("\n");
+ for (t = indent; t > 0; t--)
+ ND_PRINT("\t");
+
+ ND_PRINT("%s", tok2str(dh6opt_str, "Unknown", type));
+ ND_PRINT(" (%u)", optlen + 4 );
+ if (i + 4 + optlen > length)
+ return -1;
+
+ switch (type) {
+ case DH6OPT_DNS_SERVERS:
+ case DH6OPT_SNTP_SERVERS: {
+ if (optlen % 16 != 0) {
+ nd_print_invalid(ndo);
+ return -1;
+ }
+ for (t = 0; t < optlen; t += 16)
+ ND_PRINT(" %s", GET_IP6ADDR_STRING(value + t));
+ }
+ break;
+ case DH6OPT_DOMAIN_LIST: {
+ const u_char *tp = value;
+ while (tp < value + optlen) {
+ ND_PRINT(" ");
+ if ((tp = fqdn_print(ndo, tp, value + optlen)) == NULL)
+ return -1;
+ }
+ }
+ break;
+ }
+
+ i += 4 + optlen;
+ }
+ return 0;
+}
+
+/* Determine in-line mode */
+static int
+is_in_line(netdissect_options *ndo, int indent)
+{
+ return indent - 1 >= ndo->ndo_vflag && ndo->ndo_vflag < 3;
+}
+
+static void
+print_type_in_line(netdissect_options *ndo,
+ uint32_t type, int count, int indent, int *first_one)
+{
+ if (count > 0) {
+ if (*first_one) {
+ *first_one = 0;
+ if (indent > 1) {
+ u_int t;
+ ND_PRINT("\n");
+ for (t = indent; t > 0; t--)
+ ND_PRINT("\t");
+ } else {
+ ND_PRINT(" ");
+ }
+ } else {
+ ND_PRINT(", ");
+ }
+ ND_PRINT("%s", tok2str(type_values, "Easter Egg", type));
+ if (count > 1)
+ ND_PRINT(" (x%d)", count);
+ }
+}
+
+static void
+hncp_print_rec(netdissect_options *ndo,
+ const u_char *cp, u_int length, int indent)
+{
+ const int in_line = is_in_line(ndo, indent);
+ int first_one = 1;
+
+ u_int i, t;
+
+ uint32_t last_type_mask = 0xffffffffU;
+ int last_type_count = -1;
+
+ const uint8_t *tlv, *value;
+ uint16_t type, bodylen;
+ uint32_t type_mask;
+
+ i = 0;
+ while (i < length) {
+ tlv = cp + i;
+
+ if (!in_line) {
+ ND_PRINT("\n");
+ for (t = indent; t > 0; t--)
+ ND_PRINT("\t");
+ }
+
+ ND_TCHECK_4(tlv);
+ if (i + 4 > length)
+ goto invalid;
+
+ type = GET_BE_U_2(tlv);
+ bodylen = GET_BE_U_2(tlv + 2);
+ value = tlv + 4;
+ ND_TCHECK_LEN(value, bodylen);
+ if (i + bodylen + 4 > length)
+ goto invalid;
+
+ type_mask =
+ (type == 0) ? RANGE_DNCP_RESERVED:
+ (44 <= type && type <= 511) ? RANGE_HNCP_UNASSIGNED:
+ (768 <= type && type <= 1023) ? RANGE_DNCP_PRIVATE_USE:
+ RANGE_DNCP_FUTURE_USE;
+ if (type == 6 || type == 7)
+ type_mask = RANGE_DNCP_FUTURE_USE;
+
+ /* defined types */
+ {
+ t = 0;
+ while (1) {
+ u_int key = type_values[t++].v;
+ if (key > 0xffff)
+ break;
+ if (key == type) {
+ type_mask = type;
+ break;
+ }
+ }
+ }
+
+ if (in_line) {
+ if (last_type_mask == type_mask) {
+ last_type_count++;
+ } else {
+ print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
+ last_type_mask = type_mask;
+ last_type_count = 1;
+ }
+
+ goto skip_multiline;
+ }
+
+ ND_PRINT("%s", tok2str(type_values, "Easter Egg (42)", type_mask) );
+ if (type_mask > 0xffff)
+ ND_PRINT(": type=%u", type );
+ ND_PRINT(" (%u)", bodylen + 4 );
+
+ switch (type_mask) {
+
+ case DNCP_REQUEST_NETWORK_STATE: {
+ if (bodylen != 0)
+ nd_print_invalid(ndo);
+ }
+ break;
+
+ case DNCP_REQUEST_NODE_STATE: {
+ const char *node_identifier;
+ if (bodylen != 4) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ node_identifier = format_nid(ndo, value);
+ ND_PRINT(" NID: %s", node_identifier);
+ }
+ break;
+
+ case DNCP_NODE_ENDPOINT: {
+ const char *node_identifier;
+ uint32_t endpoint_identifier;
+ if (bodylen != 8) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ node_identifier = format_nid(ndo, value);
+ endpoint_identifier = GET_BE_U_4(value + 4);
+ ND_PRINT(" NID: %s EPID: %08x",
+ node_identifier,
+ endpoint_identifier
+ );
+ }
+ break;
+
+ case DNCP_NETWORK_STATE: {
+ uint64_t hash;
+ if (bodylen != 8) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ hash = GET_BE_U_8(value);
+ ND_PRINT(" hash: %016" PRIx64, hash);
+ }
+ break;
+
+ case DNCP_NODE_STATE: {
+ const char *node_identifier, *interval;
+ uint32_t sequence_number;
+ uint64_t hash;
+ if (bodylen < 20) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ node_identifier = format_nid(ndo, value);
+ sequence_number = GET_BE_U_4(value + 4);
+ interval = format_interval(GET_BE_U_4(value + 8));
+ hash = GET_BE_U_8(value + 12);
+ ND_PRINT(" NID: %s seqno: %u %s hash: %016" PRIx64,
+ node_identifier,
+ sequence_number,
+ interval,
+ hash
+ );
+ hncp_print_rec(ndo, value+20, bodylen-20, indent+1);
+ }
+ break;
+
+ case DNCP_PEER: {
+ const char *peer_node_identifier;
+ uint32_t peer_endpoint_identifier, endpoint_identifier;
+ if (bodylen != 12) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ peer_node_identifier = format_nid(ndo, value);
+ peer_endpoint_identifier = GET_BE_U_4(value + 4);
+ endpoint_identifier = GET_BE_U_4(value + 8);
+ ND_PRINT(" Peer-NID: %s Peer-EPID: %08x Local-EPID: %08x",
+ peer_node_identifier,
+ peer_endpoint_identifier,
+ endpoint_identifier
+ );
+ }
+ break;
+
+ case DNCP_KEEP_ALIVE_INTERVAL: {
+ uint32_t endpoint_identifier;
+ const char *interval;
+ if (bodylen < 8) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ endpoint_identifier = GET_BE_U_4(value);
+ interval = format_interval(GET_BE_U_4(value + 4));
+ ND_PRINT(" EPID: %08x Interval: %s",
+ endpoint_identifier,
+ interval
+ );
+ }
+ break;
+
+ case DNCP_TRUST_VERDICT: {
+ if (bodylen <= 36) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT(" Verdict: %u Fingerprint: %s Common Name: ",
+ GET_U_1(value),
+ format_256(ndo, value + 4));
+ nd_printjnp(ndo, value + 36, bodylen - 36);
+ }
+ break;
+
+ case HNCP_HNCP_VERSION: {
+ uint16_t capabilities;
+ uint8_t M, P, H, L;
+ if (bodylen < 5) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ capabilities = GET_BE_U_2(value + 2);
+ M = (uint8_t)((capabilities >> 12) & 0xf);
+ P = (uint8_t)((capabilities >> 8) & 0xf);
+ H = (uint8_t)((capabilities >> 4) & 0xf);
+ L = (uint8_t)(capabilities & 0xf);
+ ND_PRINT(" M: %u P: %u H: %u L: %u User-agent: ",
+ M, P, H, L
+ );
+ nd_printjnp(ndo, value + 4, bodylen - 4);
+ }
+ break;
+
+ case HNCP_EXTERNAL_CONNECTION: {
+ /* Container TLV */
+ hncp_print_rec(ndo, value, bodylen, indent+1);
+ }
+ break;
+
+ case HNCP_DELEGATED_PREFIX: {
+ int l;
+ if (bodylen < 9 || bodylen < 9 + (GET_U_1(value + 8) + 7) / 8) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT(" VLSO: %s PLSO: %s Prefix: ",
+ format_interval(GET_BE_U_4(value)),
+ format_interval(GET_BE_U_4(value + 4))
+ );
+ l = print_prefix(ndo, value + 8, bodylen - 8);
+ if (l == -1) {
+ ND_PRINT("(length is invalid)");
+ break;
+ }
+ if (l < 0) {
+ /*
+ * We've already checked that we've captured the
+ * entire TLV, based on its length, so this will
+ * either be -1, meaning "the prefix length is
+ * greater than the longest possible address of
+ * that type" (i.e., > 32 for IPv4 or > 128 for
+ * IPv6", or -3, meaning "the prefix runs past
+ * the end of the TLV".
+ */
+ nd_print_invalid(ndo);
+ break;
+ }
+ l += 8 + (-l & 3);
+
+ if (bodylen >= l)
+ hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
+ }
+ break;
+
+ case HNCP_PREFIX_POLICY: {
+ uint8_t policy;
+ int l;
+ if (bodylen < 1) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ policy = GET_U_1(value);
+ ND_PRINT(" type: ");
+ if (policy == 0) {
+ if (bodylen != 1) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT("Internet connectivity");
+ } else if (policy >= 1 && policy <= 128) {
+ ND_PRINT("Dest-Prefix: ");
+ l = print_prefix(ndo, value, bodylen);
+ if (l == -1) {
+ ND_PRINT("(length is invalid)");
+ break;
+ }
+ if (l < 0) {
+ /*
+ * We've already checked that we've captured the
+ * entire TLV, based on its length, so this will
+ * either be -1, meaning "the prefix length is
+ * greater than the longest possible address of
+ * that type" (i.e., > 32 for IPv4 or > 128 for
+ * IPv6", or -3, meaning "the prefix runs past
+ * the end of the TLV".
+ */
+ nd_print_invalid(ndo);
+ break;
+ }
+ } else if (policy == 129) {
+ ND_PRINT("DNS domain: ");
+ print_dns_label(ndo, value+1, bodylen-1, 1);
+ } else if (policy == 130) {
+ ND_PRINT("Opaque UTF-8: ");
+ nd_printjnp(ndo, value + 1, bodylen - 1);
+ } else if (policy == 131) {
+ if (bodylen != 1) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT("Restrictive assignment");
+ } else if (policy >= 132) {
+ ND_PRINT("Unknown (%u)", policy); /* Reserved for future additions */
+ }
+ }
+ break;
+
+ case HNCP_DHCPV4_DATA: {
+ if (bodylen == 0) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ if (dhcpv4_print(ndo, value, bodylen, indent+1) != 0)
+ goto invalid;
+ }
+ break;
+
+ case HNCP_DHCPV6_DATA: {
+ if (bodylen == 0) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ if (dhcpv6_print(ndo, value, bodylen, indent+1) != 0) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ }
+ break;
+
+ case HNCP_ASSIGNED_PREFIX: {
+ uint8_t prty;
+ int l;
+ if (bodylen < 6 || bodylen < 6 + (GET_U_1(value + 5) + 7) / 8) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ prty = GET_U_1(value + 4) & 0xf;
+ ND_PRINT(" EPID: %08x Prty: %u",
+ GET_BE_U_4(value),
+ prty
+ );
+ ND_PRINT(" Prefix: ");
+ if ((l = print_prefix(ndo, value + 5, bodylen - 5)) < 0) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ l += 5;
+ l += -l & 3;
+
+ if (bodylen >= l)
+ hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
+ }
+ break;
+
+ case HNCP_NODE_ADDRESS: {
+ uint32_t endpoint_identifier;
+ const char *ip_address;
+ if (bodylen < 20) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ endpoint_identifier = GET_BE_U_4(value);
+ ip_address = format_ip6addr(ndo, value + 4);
+ ND_PRINT(" EPID: %08x IP Address: %s",
+ endpoint_identifier,
+ ip_address
+ );
+
+ hncp_print_rec(ndo, value + 20, bodylen - 20, indent+1);
+ }
+ break;
+
+ case HNCP_DNS_DELEGATED_ZONE: {
+ const char *ip_address;
+ int len;
+ if (bodylen < 17) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ip_address = format_ip6addr(ndo, value);
+ ND_PRINT(" IP-Address: %s %c%c%c ",
+ ip_address,
+ (GET_U_1(value + 16) & 4) ? 'l' : '-',
+ (GET_U_1(value + 16) & 2) ? 'b' : '-',
+ (GET_U_1(value + 16) & 1) ? 's' : '-'
+ );
+ len = print_dns_label(ndo, value+17, bodylen-17, 1);
+ if (len < 0) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ len += 17;
+ len += -len & 3;
+ if (bodylen >= len)
+ hncp_print_rec(ndo, value+len, bodylen-len, indent+1);
+ }
+ break;
+
+ case HNCP_DOMAIN_NAME: {
+ if (bodylen == 0) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT(" Domain: ");
+ print_dns_label(ndo, value, bodylen, 1);
+ }
+ break;
+
+ case HNCP_NODE_NAME: {
+ u_int l;
+ if (bodylen < 17) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ l = GET_U_1(value + 16);
+ if (bodylen < 17 + l) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT(" IP-Address: %s Name: ",
+ format_ip6addr(ndo, value)
+ );
+ if (l < 64) {
+ ND_PRINT("\"");
+ nd_printjnp(ndo, value + 17, l);
+ ND_PRINT("\"");
+ } else {
+ nd_print_invalid(ndo);
+ }
+ l += 17;
+ l = roundup2(l, 4);
+ if (bodylen >= l)
+ hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
+ }
+ break;
+
+ case HNCP_MANAGED_PSK: {
+ if (bodylen < 32) {
+ nd_print_invalid(ndo);
+ break;
+ }
+ ND_PRINT(" PSK: %s", format_256(ndo, value));
+ hncp_print_rec(ndo, value + 32, bodylen - 32, indent+1);
+ }
+ break;
+
+ case RANGE_DNCP_RESERVED:
+ case RANGE_HNCP_UNASSIGNED:
+ case RANGE_DNCP_PRIVATE_USE:
+ case RANGE_DNCP_FUTURE_USE:
+ break;
+
+ }
+ skip_multiline:
+
+ i += 4 + roundup2(bodylen, 4);
+ }
+ print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
+
+ return;
+
+ trunc:
+ nd_print_trunc(ndo);
+ return;
+
+ invalid:
+ nd_print_invalid(ndo);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 13:27:13 +0000