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tcpdump/print-olsr.c
Denis Ovsienko cfa9ab5f80 Try the new ND_LCHECK*() macros. [skip ci]
2021-01-17 23:11:19 +00:00

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/*
* Copyright (c) 1998-2007 The TCPDUMP project
* Copyright (c) 2009 Florian Forster
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code
* distributions retain the above copyright notice and this paragraph
* in its entirety, and (2) distributions including binary code include
* the above copyright notice and this paragraph in its entirety in
* the documentation or other materials provided with the distribution.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
* LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* Original code by Hannes Gredler <hannes@gredler.at>
* IPv6 additions by Florian Forster <octo at verplant.org>
*/
/* \summary: Optimized Link State Routing Protocol (OLSR) printer */
/* specification: RFC 3626 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "addrtoname.h"
#include "extract.h"
/*
* RFC 3626 common header
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Packet Length | Packet Sequence Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Message Type | Vtime | Message Size |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Originator Address |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Time To Live | Hop Count | Message Sequence Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* : MESSAGE :
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Message Type | Vtime | Message Size |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Originator Address |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Time To Live | Hop Count | Message Sequence Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | |
* : MESSAGE :
* | |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* : :
*/
struct olsr_common {
nd_uint16_t packet_len;
nd_uint16_t packet_seq;
};
#define OLSR_HELLO_MSG 1 /* rfc3626 */
#define OLSR_TC_MSG 2 /* rfc3626 */
#define OLSR_MID_MSG 3 /* rfc3626 */
#define OLSR_HNA_MSG 4 /* rfc3626 */
#define OLSR_POWERINFO_MSG 128
#define OLSR_NAMESERVICE_MSG 130
#define OLSR_HELLO_LQ_MSG 201 /* LQ extensions olsr.org */
#define OLSR_TC_LQ_MSG 202 /* LQ extensions olsr.org */
static const struct tok olsr_msg_values[] = {
{ OLSR_HELLO_MSG, "Hello" },
{ OLSR_TC_MSG, "TC" },
{ OLSR_MID_MSG, "MID" },
{ OLSR_HNA_MSG, "HNA" },
{ OLSR_POWERINFO_MSG, "Powerinfo" },
{ OLSR_NAMESERVICE_MSG, "Nameservice" },
{ OLSR_HELLO_LQ_MSG, "Hello-LQ" },
{ OLSR_TC_LQ_MSG, "TC-LQ" },
{ 0, NULL}
};
struct olsr_msg4 {
nd_uint8_t msg_type;
nd_uint8_t vtime;
nd_uint16_t msg_len;
nd_ipv4 originator;
nd_uint8_t ttl;
nd_uint8_t hopcount;
nd_uint16_t msg_seq;
};
struct olsr_msg6 {
nd_uint8_t msg_type;
nd_uint8_t vtime;
nd_uint16_t msg_len;
nd_ipv6 originator;
nd_uint8_t ttl;
nd_uint8_t hopcount;
nd_uint16_t msg_seq;
};
struct olsr_hello {
nd_byte res[2];
nd_uint8_t htime;
nd_uint8_t will;
};
struct olsr_hello_link {
nd_uint8_t link_code;
nd_byte res;
nd_uint16_t len;
};
struct olsr_tc {
nd_uint16_t ans_seq;
nd_byte res[2];
};
struct olsr_hna4 {
nd_ipv4 network;
nd_ipv4 mask;
};
struct olsr_hna6 {
nd_ipv6 network;
nd_ipv6 mask;
};
/** gateway HNA flags */
enum gateway_hna_flags {
GW_HNA_FLAG_LINKSPEED = 1 << 0,
GW_HNA_FLAG_IPV4 = 1 << 1,
GW_HNA_FLAG_IPV4_NAT = 1 << 2,
GW_HNA_FLAG_IPV6 = 1 << 3,
GW_HNA_FLAG_IPV6PREFIX = 1 << 4
};
/** gateway HNA field byte offsets in the netmask field of the HNA */
enum gateway_hna_fields {
GW_HNA_PAD = 0,
GW_HNA_FLAGS = 1,
GW_HNA_UPLINK = 2,
GW_HNA_DOWNLINK = 3,
GW_HNA_V6PREFIXLEN = 4,
GW_HNA_V6PREFIX = 5
};
#define OLSR_EXTRACT_LINK_TYPE(link_code) (link_code & 0x3)
#define OLSR_EXTRACT_NEIGHBOR_TYPE(link_code) (link_code >> 2)
static const struct tok olsr_link_type_values[] = {
{ 0, "Unspecified" },
{ 1, "Asymmetric" },
{ 2, "Symmetric" },
{ 3, "Lost" },
{ 0, NULL}
};
static const struct tok olsr_neighbor_type_values[] = {
{ 0, "Not-Neighbor" },
{ 1, "Symmetric" },
{ 2, "Symmetric-MPR" },
{ 0, NULL}
};
struct olsr_lq_neighbor4 {
nd_ipv4 neighbor;
nd_uint8_t link_quality;
nd_uint8_t neighbor_link_quality;
nd_byte res[2];
};
struct olsr_lq_neighbor6 {
nd_ipv6 neighbor;
nd_uint8_t link_quality;
nd_uint8_t neighbor_link_quality;
nd_byte res[2];
};
#define MAX_SMARTGW_SPEED 320000000
/**
* Convert an encoded 1 byte transport value (5 bits mantissa, 3 bits exponent)
* to an uplink/downlink speed value
*
* @param value the encoded 1 byte transport value
* @return the uplink/downlink speed value (in kbit/s)
*/
static uint32_t deserialize_gw_speed(uint8_t value) {
uint32_t speed;
uint32_t exp;
if (!value) {
return 0;
}
if (value == UINT8_MAX) {
/* maximum value: also return maximum value */
return MAX_SMARTGW_SPEED;
}
speed = (value >> 3) + 1;
exp = value & 7;
while (exp != 0) {
speed *= 10;
exp--;
}
return speed;
}
/*
* macro to convert the 8-bit mantissa/exponent to a double float
* taken from olsr.org.
*/
#define VTIME_SCALE_FACTOR 0.0625
#define ME_TO_DOUBLE(me) \
(double)(VTIME_SCALE_FACTOR*(1+(double)(me>>4)/16)*(double)(1<<(me&0x0F)))
/*
* print a neighbor list with LQ extensions.
*/
static void
olsr_print_lq_neighbor4(netdissect_options *ndo,
const u_char *msg_data, u_int hello_len)
{
const struct olsr_lq_neighbor4 *lq_neighbor;
while (hello_len >= sizeof(struct olsr_lq_neighbor4)) {
lq_neighbor = (const struct olsr_lq_neighbor4 *)msg_data;
ND_TCHECK_SIZE(lq_neighbor);
ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
", neighbor-link-quality %.2f%%",
GET_IPADDR_STRING(lq_neighbor->neighbor),
((double) GET_U_1(lq_neighbor->link_quality)/2.55),
((double) GET_U_1(lq_neighbor->neighbor_link_quality)/2.55));
msg_data += sizeof(struct olsr_lq_neighbor4);
hello_len -= sizeof(struct olsr_lq_neighbor4);
}
}
static void
olsr_print_lq_neighbor6(netdissect_options *ndo,
const u_char *msg_data, u_int hello_len)
{
const struct olsr_lq_neighbor6 *lq_neighbor;
while (hello_len >= sizeof(struct olsr_lq_neighbor6)) {
lq_neighbor = (const struct olsr_lq_neighbor6 *)msg_data;
ND_TCHECK_SIZE(lq_neighbor);
ND_PRINT("\n\t neighbor %s, link-quality %.2f%%"
", neighbor-link-quality %.2f%%",
GET_IP6ADDR_STRING(lq_neighbor->neighbor),
((double) GET_U_1(lq_neighbor->link_quality)/2.55),
((double) GET_U_1(lq_neighbor->neighbor_link_quality)/2.55));
msg_data += sizeof(struct olsr_lq_neighbor6);
hello_len -= sizeof(struct olsr_lq_neighbor6);
}
}
/*
* print a neighbor list.
*/
static void
olsr_print_neighbor(netdissect_options *ndo,
const u_char *msg_data, u_int hello_len)
{
int neighbor;
ND_PRINT("\n\t neighbor\n\t\t");
neighbor = 1;
while (hello_len >= sizeof(nd_ipv4)) {
/* print 4 neighbors per line */
ND_PRINT("%s%s", GET_IPADDR_STRING(msg_data),
neighbor % 4 == 0 ? "\n\t\t" : " ");
msg_data += sizeof(nd_ipv4);
hello_len -= sizeof(nd_ipv4);
}
}
void
olsr_print(netdissect_options *ndo,
const u_char *pptr, u_int length, int is_ipv6)
{
union {
const struct olsr_common *common;
const struct olsr_msg4 *msg4;
const struct olsr_msg6 *msg6;
const struct olsr_hello *hello;
const struct olsr_hello_link *hello_link;
const struct olsr_tc *tc;
const struct olsr_hna4 *hna;
} ptr;
u_int msg_type, msg_len, msg_tlen, hello_len;
uint16_t name_entry_type, name_entry_len;
u_int name_entry_padding;
uint8_t link_type, neighbor_type;
const u_char *tptr, *msg_data;
ndo->ndo_protocol = "olsr";
tptr = pptr;
nd_print_protocol_caps(ndo);
ND_PRINT("v%u", (is_ipv6) ? 6 : 4);
ND_LCHECKMSG_ZU(length, sizeof(struct olsr_common), "packet length");
ptr.common = (const struct olsr_common *)tptr;
length = ND_MIN(length, GET_BE_U_2(ptr.common->packet_len));
ND_PRINT(", seq 0x%04x, length %u",
GET_BE_U_2(ptr.common->packet_seq),
length);
tptr += sizeof(struct olsr_common);
/*
* In non-verbose mode, just print version.
*/
if (ndo->ndo_vflag < 1) {
return;
}
while (tptr < (pptr+length)) {
union
{
const struct olsr_msg4 *v4;
const struct olsr_msg6 *v6;
} msgptr;
int msg_len_valid = 0;
if (is_ipv6)
{
ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg6));
msgptr.v6 = (const struct olsr_msg6 *) tptr;
msg_type = GET_U_1(msgptr.v6->msg_type);
msg_len = GET_BE_U_2(msgptr.v6->msg_len);
if ((msg_len >= sizeof (struct olsr_msg6))
&& (msg_len <= length))
msg_len_valid = 1;
/* infinite loop check */
if (msg_type == 0 || msg_len == 0) {
return;
}
ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
"\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
tok2str(olsr_msg_values, "Unknown", msg_type),
msg_type, GET_IP6ADDR_STRING(msgptr.v6->originator),
GET_U_1(msgptr.v6->ttl),
GET_U_1(msgptr.v6->hopcount),
ME_TO_DOUBLE(GET_U_1(msgptr.v6->vtime)),
GET_BE_U_2(msgptr.v6->msg_seq),
msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
if (!msg_len_valid) {
return;
}
msg_tlen = msg_len - sizeof(struct olsr_msg6);
msg_data = tptr + sizeof(struct olsr_msg6);
}
else /* (!is_ipv6) */
{
ND_TCHECK_LEN(tptr, sizeof(struct olsr_msg4));
msgptr.v4 = (const struct olsr_msg4 *) tptr;
msg_type = GET_U_1(msgptr.v4->msg_type);
msg_len = GET_BE_U_2(msgptr.v4->msg_len);
if ((msg_len >= sizeof (struct olsr_msg4))
&& (msg_len <= length))
msg_len_valid = 1;
/* infinite loop check */
if (msg_type == 0 || msg_len == 0) {
return;
}
ND_PRINT("\n\t%s Message (%#04x), originator %s, ttl %u, hop %u"
"\n\t vtime %.3fs, msg-seq 0x%04x, length %u%s",
tok2str(olsr_msg_values, "Unknown", msg_type),
msg_type, GET_IPADDR_STRING(msgptr.v4->originator),
GET_U_1(msgptr.v4->ttl),
GET_U_1(msgptr.v4->hopcount),
ME_TO_DOUBLE(GET_U_1(msgptr.v4->vtime)),
GET_BE_U_2(msgptr.v4->msg_seq),
msg_len, (msg_len_valid == 0) ? " (invalid)" : "");
if (!msg_len_valid) {
return;
}
msg_tlen = msg_len - sizeof(struct olsr_msg4);
msg_data = tptr + sizeof(struct olsr_msg4);
}
switch (msg_type) {
case OLSR_HELLO_MSG:
case OLSR_HELLO_LQ_MSG:
ND_LCHECKMSG_ZU(msg_tlen, sizeof(struct olsr_hello), "message length");
ptr.hello = (const struct olsr_hello *)msg_data;
ND_PRINT("\n\t hello-time %.3fs, MPR willingness %u",
ME_TO_DOUBLE(GET_U_1(ptr.hello->htime)),
GET_U_1(ptr.hello->will));
msg_data += sizeof(struct olsr_hello);
msg_tlen -= sizeof(struct olsr_hello);
while (msg_tlen >= sizeof(struct olsr_hello_link)) {
int hello_len_valid = 0;
/*
* link-type.
*/
ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hello_link));
ptr.hello_link = (const struct olsr_hello_link *)msg_data;
hello_len = GET_BE_U_2(ptr.hello_link->len);
link_type = OLSR_EXTRACT_LINK_TYPE(GET_U_1(ptr.hello_link->link_code));
neighbor_type = OLSR_EXTRACT_NEIGHBOR_TYPE(GET_U_1(ptr.hello_link->link_code));
if ((hello_len <= msg_tlen)
&& (hello_len >= sizeof(struct olsr_hello_link)))
hello_len_valid = 1;
ND_PRINT("\n\t link-type %s, neighbor-type %s, len %u%s",
tok2str(olsr_link_type_values, "Unknown", link_type),
tok2str(olsr_neighbor_type_values, "Unknown", neighbor_type),
hello_len,
(hello_len_valid == 0) ? " (invalid)" : "");
if (hello_len_valid == 0)
break;
msg_data += sizeof(struct olsr_hello_link);
msg_tlen -= sizeof(struct olsr_hello_link);
hello_len -= sizeof(struct olsr_hello_link);
ND_TCHECK_LEN(msg_data, hello_len);
if (msg_type == OLSR_HELLO_MSG) {
olsr_print_neighbor(ndo, msg_data, hello_len);
} else {
if (is_ipv6) {
olsr_print_lq_neighbor6(ndo, msg_data, hello_len);
} else {
olsr_print_lq_neighbor4(ndo, msg_data, hello_len);
}
}
msg_data += hello_len;
msg_tlen -= hello_len;
}
break;
case OLSR_TC_MSG:
case OLSR_TC_LQ_MSG:
ND_LCHECKMSG_ZU(msg_tlen, sizeof(struct olsr_tc), "message length");
ND_TCHECK_LEN(msg_data, sizeof(struct olsr_tc));
ptr.tc = (const struct olsr_tc *)msg_data;
ND_PRINT("\n\t advertised neighbor seq 0x%04x",
GET_BE_U_2(ptr.tc->ans_seq));
msg_data += sizeof(struct olsr_tc);
msg_tlen -= sizeof(struct olsr_tc);
if (msg_type == OLSR_TC_MSG) {
olsr_print_neighbor(ndo, msg_data, msg_tlen);
} else {
if (is_ipv6) {
olsr_print_lq_neighbor6(ndo, msg_data, msg_tlen);
} else {
olsr_print_lq_neighbor4(ndo, msg_data, msg_tlen);
}
}
break;
case OLSR_MID_MSG:
{
u_int addr_size = (u_int)sizeof(nd_ipv4);
if (is_ipv6)
addr_size = (u_int)sizeof(nd_ipv6);
while (msg_tlen >= addr_size) {
ND_TCHECK_LEN(msg_data, addr_size);
ND_PRINT("\n\t interface address %s",
is_ipv6 ? GET_IP6ADDR_STRING(msg_data) :
GET_IPADDR_STRING(msg_data));
msg_data += addr_size;
msg_tlen -= addr_size;
}
break;
}
case OLSR_HNA_MSG:
if (is_ipv6)
{
int i = 0;
ND_PRINT("\n\t Advertised networks (total %u)",
(unsigned int) (msg_tlen / sizeof(struct olsr_hna6)));
while (msg_tlen >= sizeof(struct olsr_hna6)) {
const struct olsr_hna6 *hna6;
ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna6));
hna6 = (const struct olsr_hna6 *)msg_data;
ND_PRINT("\n\t #%i: %s/%u",
i, GET_IP6ADDR_STRING(hna6->network),
mask62plen (hna6->mask));
msg_data += sizeof(struct olsr_hna6);
msg_tlen -= sizeof(struct olsr_hna6);
}
}
else
{
int col = 0;
ND_PRINT("\n\t Advertised networks (total %u)",
(unsigned int) (msg_tlen / sizeof(struct olsr_hna4)));
while (msg_tlen >= sizeof(struct olsr_hna4)) {
ND_TCHECK_LEN(msg_data, sizeof(struct olsr_hna4));
ptr.hna = (const struct olsr_hna4 *)msg_data;
/* print 4 prefixes per line */
if (!ptr.hna->network[0] && !ptr.hna->network[1] &&
!ptr.hna->network[2] && !ptr.hna->network[3] &&
!ptr.hna->mask[GW_HNA_PAD] &&
ptr.hna->mask[GW_HNA_FLAGS]) {
/* smart gateway */
ND_PRINT("%sSmart-Gateway:%s%s%s%s%s %u/%u",
col == 0 ? "\n\t " : ", ", /* indent */
/* sgw */
/* LINKSPEED */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_LINKSPEED) ? " LINKSPEED" : "",
/* IPV4 */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_IPV4) ? " IPV4" : "",
/* IPV4-NAT */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_IPV4_NAT) ? " IPV4-NAT" : "",
/* IPV6 */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_IPV6) ? " IPV6" : "",
/* IPv6PREFIX */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_IPV6PREFIX) ? " IPv6-PREFIX" : "",
/* uplink */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_LINKSPEED) ?
deserialize_gw_speed(ptr.hna->mask[GW_HNA_UPLINK]) : 0,
/* downlink */
(ptr.hna->mask[GW_HNA_FLAGS] &
GW_HNA_FLAG_LINKSPEED) ?
deserialize_gw_speed(ptr.hna->mask[GW_HNA_DOWNLINK]) : 0
);
} else {
/* normal route */
ND_PRINT("%s%s/%u",
col == 0 ? "\n\t " : ", ",
GET_IPADDR_STRING(ptr.hna->network),
mask2plen(GET_BE_U_4(ptr.hna->mask)));
}
msg_data += sizeof(struct olsr_hna4);
msg_tlen -= sizeof(struct olsr_hna4);
col = (col + 1) % 4;
}
}
break;
case OLSR_NAMESERVICE_MSG:
{
u_int name_entries;
u_int addr_size;
int name_entries_valid;
u_int i;
ND_LCHECKMSG_U(msg_tlen, 4, "message length");
name_entries = GET_BE_U_2(msg_data + 2);
addr_size = 4;
if (is_ipv6)
addr_size = 16;
name_entries_valid = 0;
if ((name_entries > 0)
&& ((name_entries * (4 + addr_size)) <= msg_tlen))
name_entries_valid = 1;
ND_PRINT("\n\t Version %u, Entries %u%s",
GET_BE_U_2(msg_data),
name_entries, (name_entries_valid == 0) ? " (invalid)" : "");
if (name_entries_valid == 0)
break;
msg_data += 4;
msg_tlen -= 4;
for (i = 0; i < name_entries; i++) {
int name_entry_len_valid = 0;
if (msg_tlen < 4)
break;
name_entry_type = GET_BE_U_2(msg_data);
name_entry_len = GET_BE_U_2(msg_data + 2);
msg_data += 4;
msg_tlen -= 4;
if ((name_entry_len > 0) && ((addr_size + name_entry_len) <= msg_tlen))
name_entry_len_valid = 1;
ND_PRINT("\n\t #%u: type %#06x, length %u%s",
(unsigned int) i, name_entry_type,
name_entry_len, (name_entry_len_valid == 0) ? " (invalid)" : "");
if (name_entry_len_valid == 0)
break;
/* 32-bit alignment */
name_entry_padding = 0;
if (name_entry_len%4 != 0)
name_entry_padding = 4-(name_entry_len%4);
ND_LCHECKMSG_U(msg_tlen, addr_size + name_entry_len + name_entry_padding,
"name entry length");
ND_TCHECK_LEN(msg_data,
addr_size + name_entry_len + name_entry_padding);
if (is_ipv6)
ND_PRINT(", address %s, name \"",
GET_IP6ADDR_STRING(msg_data));
else
ND_PRINT(", address %s, name \"",
GET_IPADDR_STRING(msg_data));
nd_printjn(ndo, msg_data + addr_size, name_entry_len);
ND_PRINT("\"");
msg_data += addr_size + name_entry_len + name_entry_padding;
msg_tlen -= addr_size + name_entry_len + name_entry_padding;
} /* for (i = 0; i < name_entries; i++) */
break;
} /* case OLSR_NAMESERVICE_MSG */
/*
* FIXME those are the defined messages that lack a decoder
* you are welcome to contribute code ;-)
*/
case OLSR_POWERINFO_MSG:
default:
print_unknown_data(ndo, msg_data, "\n\t ", msg_tlen);
break;
} /* switch (msg_type) */
tptr += msg_len;
} /* while (tptr < (pptr+length)) */
return;
invalid:
nd_print_invalid(ndo);
}
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