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tcpdump/print-hncp.c
Guy Harris 06c4ca1ac2 Further IPv4-mapped IPv6 address cleanups. 
Have a routine to check for those addresses, and use it in all cases.

Have a #define for the length of the fixed part of those addresses at
the beginning, and use it.

Fix a length check; Coverity noted that the check never failed, because
we were comparing the length of the prefix field in the packet with the
length of the IPv4 prefix, not the length of the IPv4 prefix plus the
fixed part at the beginning.
2016-10-30 11:15:40 -07:00

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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 <stdlib.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)
{
ND_PRINT((ndo, "hncp (%d)", 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
#define HNCP_DHCPV6_DATA 38
#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 inline 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(const u_char *data)
{
static char buf[4][11+5];
static int i = 0;
i = (i + 1) % 4;
snprintf(buf[i], 16, "%02x:%02x:%02x:%02x",
data[0], data[1], data[2], data[3]);
return buf[i];
}
static const char *
format_256(const u_char *data)
{
static char buf[4][64+5];
static int i = 0;
i = (i + 1) % 4;
snprintf(buf[i], 28, "%016" PRIx64 "%016" PRIx64 "%016" PRIx64 "%016" PRIx64,
EXTRACT_64BITS(data),
EXTRACT_64BITS(data + 8),
EXTRACT_64BITS(data + 16),
EXTRACT_64BITS(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 ipaddr_string(ndo, cp + IPV4_MAPPED_HEADING_LEN);
else
return ip6addr_string(ndo, 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 (prefix[0] >= 96 && max_length >= IPV4_MAPPED_HEADING_LEN + 1 &&
is_ipv4_mapped_address(&prefix[1])) {
struct in_addr addr;
u_int plen;
plen = prefix[0]-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[1 + IPV4_MAPPED_HEADING_LEN], plenbytes);
if (plen % 8) {
((u_char *)&addr)[plenbytes - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
snprintf(buf, sizeof(buf), "%s/%d", ipaddr_string(ndo, &addr), plen);
plenbytes += 1 + IPV4_MAPPED_HEADING_LEN;
} else {
plenbytes = decode_prefix6(ndo, prefix, max_length, buf, sizeof(buf));
}
ND_PRINT((ndo, "%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 = cp[length++];
if (lab_length == 0)
return (int)length;
if (length > 1 && print)
safeputchar(ndo, '.');
if (length+lab_length > max_length) {
if (print)
safeputs(ndo, cp+length, max_length-length);
break;
}
if (print)
safeputs(ndo, cp+length, lab_length);
length += lab_length;
}
if (print)
ND_PRINT((ndo, "[|DNS]"));
return -1;
}
static int
dhcpv4_print(netdissect_options *ndo,
const u_char *cp, u_int length, int indent)
{
u_int i, t;
const u_char *tlv, *value;
uint8_t type, optlen;
i = 0;
while (i < length) {
tlv = cp + i;
type = (uint8_t)tlv[0];
optlen = (uint8_t)tlv[1];
value = tlv + 2;
ND_PRINT((ndo, "\n"));
for (t = indent; t > 0; t--)
ND_PRINT((ndo, "\t"));
ND_PRINT((ndo, "%s", tok2str(dh4opt_str, "Unknown", type)));
ND_PRINT((ndo," (%u)", optlen + 2 ));
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((ndo, " %s", ipaddr_string(ndo, value + t)));
}
break;
case DH4OPT_DOMAIN_SEARCH: {
const u_char *tp = value;
while (tp < value + optlen) {
ND_PRINT((ndo, " "));
if ((tp = ns_nprint(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) {
tlv = cp + i;
type = EXTRACT_16BITS(tlv);
optlen = EXTRACT_16BITS(tlv + 2);
value = tlv + 4;
ND_PRINT((ndo, "\n"));
for (t = indent; t > 0; t--)
ND_PRINT((ndo, "\t"));
ND_PRINT((ndo, "%s", tok2str(dh6opt_str, "Unknown", type)));
ND_PRINT((ndo," (%u)", optlen + 4 ));
switch (type) {
case DH6OPT_DNS_SERVERS:
case DH6OPT_SNTP_SERVERS: {
if (optlen % 16 != 0) {
ND_PRINT((ndo, " %s", istr));
return -1;
}
for (t = 0; t < optlen; t += 16)
ND_PRINT((ndo, " %s", ip6addr_string(ndo, value + t)));
}
break;
case DH6OPT_DOMAIN_LIST: {
const u_char *tp = value;
while (tp < value + optlen) {
ND_PRINT((ndo, " "));
if ((tp = ns_nprint(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((ndo, "\n"));
for (t = indent; t > 0; t--)
ND_PRINT((ndo, "\t"));
} else {
ND_PRINT((ndo, " "));
}
} else {
ND_PRINT((ndo, ", "));
}
ND_PRINT((ndo, "%s", tok2str(type_values, "Easter Egg", type)));
if (count > 1)
ND_PRINT((ndo, " (x%d)", count));
}
}
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 u_char *tlv, *value;
uint16_t type, bodylen;
uint32_t type_mask;
i = 0;
while (i < length) {
tlv = cp + i;
if (!in_line) {
ND_PRINT((ndo, "\n"));
for (t = indent; t > 0; t--)
ND_PRINT((ndo, "\t"));
}
ND_TCHECK2(*tlv, 4);
if (i + 4 > length)
goto invalid;
type = EXTRACT_16BITS(tlv);
bodylen = EXTRACT_16BITS(tlv + 2);
value = tlv + 4;
ND_TCHECK2(*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((ndo,"%s", tok2str(type_values, "Easter Egg (42)", type_mask) ));
if (type_mask > 0xffff)
ND_PRINT((ndo,": type=%u", type ));
ND_PRINT((ndo," (%u)", bodylen + 4 ));
switch (type_mask) {
case DNCP_REQUEST_NETWORK_STATE: {
if (bodylen != 0)
ND_PRINT((ndo, " %s", istr));
}
break;
case DNCP_REQUEST_NODE_STATE: {
const char *node_identifier;
if (bodylen != 4) {
ND_PRINT((ndo, " %s", istr));
break;
}
node_identifier = format_nid(value);
ND_PRINT((ndo, " NID: %s", node_identifier));
}
break;
case DNCP_NODE_ENDPOINT: {
const char *node_identifier;
uint32_t endpoint_identifier;
if (bodylen != 8) {
ND_PRINT((ndo, " %s", istr));
break;
}
node_identifier = format_nid(value);
endpoint_identifier = EXTRACT_32BITS(value + 4);
ND_PRINT((ndo, " NID: %s EPID: %08x",
node_identifier,
endpoint_identifier
));
}
break;
case DNCP_NETWORK_STATE: {
uint64_t hash;
if (bodylen != 8) {
ND_PRINT((ndo, " %s", istr));
break;
}
hash = EXTRACT_64BITS(value);
ND_PRINT((ndo, " 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((ndo, " %s", istr));
break;
}
node_identifier = format_nid(value);
sequence_number = EXTRACT_32BITS(value + 4);
interval = format_interval(EXTRACT_32BITS(value + 8));
hash = EXTRACT_64BITS(value + 12);
ND_PRINT((ndo, " 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((ndo, " %s", istr));
break;
}
peer_node_identifier = format_nid(value);
peer_endpoint_identifier = EXTRACT_32BITS(value + 4);
endpoint_identifier = EXTRACT_32BITS(value + 8);
ND_PRINT((ndo, " 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((ndo, " %s", istr));
break;
}
endpoint_identifier = EXTRACT_32BITS(value);
interval = format_interval(EXTRACT_32BITS(value + 4));
ND_PRINT((ndo, " EPID: %08x Interval: %s",
endpoint_identifier,
interval
));
}
break;
case DNCP_TRUST_VERDICT: {
if (bodylen <= 36) {
ND_PRINT((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, " Verdict: %u Fingerprint: %s Common Name: ",
*value,
format_256(value + 4)));
safeputs(ndo, value + 36, bodylen - 36);
}
break;
case HNCP_HNCP_VERSION: {
uint16_t capabilities;
uint8_t M, P, H, L;
if (bodylen < 5) {
ND_PRINT((ndo, " %s", istr));
break;
}
capabilities = EXTRACT_16BITS(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((ndo, " M: %u P: %u H: %u L: %u User-agent: ",
M, P, H, L
));
safeputs(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 + (value[8] + 7) / 8) {
ND_PRINT((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, " VLSO: %s PLSO: %s Prefix: ",
format_interval(EXTRACT_32BITS(value)),
format_interval(EXTRACT_32BITS(value + 4))
));
l = print_prefix(ndo, value + 8, bodylen - 8);
if (l == -1) {
ND_PRINT((ndo, "(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((ndo, " %s", istr));
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((ndo, " %s", istr));
break;
}
policy = value[0];
ND_PRINT((ndo, " type: "));
if (policy == 0) {
if (bodylen != 1) {
ND_PRINT((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, "Internet connectivity"));
} else if (policy >= 1 && policy <= 128) {
ND_PRINT((ndo, "Dest-Prefix: "));
l = print_prefix(ndo, value, bodylen);
if (l == -1) {
ND_PRINT((ndo, "(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((ndo, " %s", istr));
break;
}
} else if (policy == 129) {
ND_PRINT((ndo, "DNS domain: "));
print_dns_label(ndo, value+1, bodylen-1, 1);
} else if (policy == 130) {
ND_PRINT((ndo, "Opaque UTF-8: "));
safeputs(ndo, value + 1, bodylen - 1);
} else if (policy == 131) {
if (bodylen != 1) {
ND_PRINT((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, "Restrictive assignment"));
} else if (policy >= 132) {
ND_PRINT((ndo, "Unknown (%u)", policy)); /* Reserved for future additions */
}
}
break;
case HNCP_DHCPV4_DATA: {
if (bodylen == 0) {
ND_PRINT((ndo, " %s", istr));
break;
}
if (dhcpv4_print(ndo, value, bodylen, indent+1) != 0)
goto invalid;
}
break;
case HNCP_DHCPV6_DATA: {
if (bodylen == 0) {
ND_PRINT((ndo, " %s", istr));
break;
}
if (dhcpv6_print(ndo, value, bodylen, indent+1) != 0) {
ND_PRINT((ndo, " %s", istr));
break;
}
}
break;
case HNCP_ASSIGNED_PREFIX: {
uint8_t prty;
int l;
if (bodylen < 6 || bodylen < 6 + (value[5] + 7) / 8) {
ND_PRINT((ndo, " %s", istr));
break;
}
prty = (uint8_t)(value[4] & 0xf);
ND_PRINT((ndo, " EPID: %08x Prty: %u",
EXTRACT_32BITS(value),
prty
));
ND_PRINT((ndo, " Prefix: "));
if ((l = print_prefix(ndo, value + 5, bodylen - 5)) < 0) {
ND_PRINT((ndo, " %s", istr));
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((ndo, " %s", istr));
break;
}
endpoint_identifier = EXTRACT_32BITS(value);
ip_address = format_ip6addr(ndo, value + 4);
ND_PRINT((ndo, " 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((ndo, " %s", istr));
break;
}
ip_address = format_ip6addr(ndo, value);
ND_PRINT((ndo, " IP-Address: %s %c%c%c ",
ip_address,
(value[16] & 4) ? 'l' : '-',
(value[16] & 2) ? 'b' : '-',
(value[16] & 1) ? 's' : '-'
));
len = print_dns_label(ndo, value+17, bodylen-17, 1);
if (len < 0) {
ND_PRINT((ndo, " %s", istr));
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((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, " Domain: "));
print_dns_label(ndo, value, bodylen, 1);
}
break;
case HNCP_NODE_NAME: {
u_int l;
if (bodylen < 17) {
ND_PRINT((ndo, " %s", istr));
break;
}
l = value[16];
if (bodylen < 17 + l) {
ND_PRINT((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, " IP-Address: %s Name: ",
format_ip6addr(ndo, value)
));
if (l < 64) {
safeputchar(ndo, '"');
safeputs(ndo, value + 17, l);
safeputchar(ndo, '"');
} else {
ND_PRINT((ndo, "%s", istr));
}
l += 17;
l += -l & 3;
if (bodylen >= l)
hncp_print_rec(ndo, value + l, bodylen - l, indent+1);
}
break;
case HNCP_MANAGED_PSK: {
if (bodylen < 32) {
ND_PRINT((ndo, " %s", istr));
break;
}
ND_PRINT((ndo, " PSK: %s", format_256(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 + bodylen + (-bodylen & 3);
}
print_type_in_line(ndo, last_type_mask, last_type_count, indent, &first_one);
return;
trunc:
ND_PRINT((ndo, "%s", "[|hncp]"));
return;
invalid:
ND_PRINT((ndo, "%s", istr));
return;
}
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