Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/tcpdump/print-lwres.c	Lines:	0	194	0.0 %
Date:	2017-11-13	Branches:	0	136	0.0 %


/*
 * Copyright (C) 2001 WIDE Project.
 * All rights reserved.
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <sys/time.h>

#include <netinet/in.h>

#ifdef NOERROR
#undef NOERROR					/* Solaris sucks */
#endif
#ifdef NOERROR
#undef T_UNSPEC					/* SINIX does too */
#endif
#include "nameser.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <resolv.h>			/* for b64_ntop() proto */

#include "interface.h"
#include "addrtoname.h"
#include "extract.h"                    /* must come after interface.h */

/* BIND9 lib/lwres/include/lwres */
typedef u_int32_t lwres_uint32_t;
typedef u_int16_t lwres_uint16_t;
typedef u_int8_t lwres_uint8_t;

struct lwres_lwpacket {
	lwres_uint32_t		length;
	lwres_uint16_t		version;
	lwres_uint16_t		pktflags;
	lwres_uint32_t		serial;
	lwres_uint32_t		opcode;
	lwres_uint32_t		result;
	lwres_uint32_t		recvlength;
	lwres_uint16_t		authtype;
	lwres_uint16_t		authlength;
};

#define LWRES_LWPACKETFLAG_RESPONSE	0x0001U	/* if set, pkt is a response */

#define LWRES_LWPACKETVERSION_0		0

#define LWRES_FLAG_TRUSTNOTREQUIRED	0x00000001U
#define LWRES_FLAG_SECUREDATA		0x00000002U

/*
 * no-op
 */
#define LWRES_OPCODE_NOOP		0x00000000U

typedef struct {
	/* public */
	lwres_uint16_t			datalength;
	/* data follows */
} lwres_nooprequest_t;

typedef struct {
	/* public */
	lwres_uint16_t			datalength;
	/* data follows */
} lwres_noopresponse_t;

/*
 * get addresses by name
 */
#define LWRES_OPCODE_GETADDRSBYNAME	0x00010001U

typedef struct lwres_addr lwres_addr_t;

struct lwres_addr {
	lwres_uint32_t			family;
	lwres_uint16_t			length;
	/* address folows */
};

typedef struct {
	/* public */
	lwres_uint32_t			flags;
	lwres_uint32_t			addrtypes;
	lwres_uint16_t			namelen;
	/* name follows */
} lwres_gabnrequest_t;

typedef struct {
	/* public */
	lwres_uint32_t			flags;
	lwres_uint16_t			naliases;
	lwres_uint16_t			naddrs;
	lwres_uint16_t			realnamelen;
	/* aliases follows */
	/* addrs follows */
	/* realname follows */
} lwres_gabnresponse_t;

/*
 * get name by address
 */
#define LWRES_OPCODE_GETNAMEBYADDR	0x00010002U
typedef struct {
	/* public */
	lwres_uint32_t			flags;
	lwres_addr_t			addr;
	/* addr body follows */
} lwres_gnbarequest_t;

typedef struct {
	/* public */
	lwres_uint32_t			flags;
	lwres_uint16_t			naliases;
	lwres_uint16_t			realnamelen;
	/* aliases follows */
	/* realname follows */
} lwres_gnbaresponse_t;

/*
 * get rdata by name
 */
#define LWRES_OPCODE_GETRDATABYNAME	0x00010003U

typedef struct {
	/* public */
	lwres_uint32_t			flags;
	lwres_uint16_t			rdclass;
	lwres_uint16_t			rdtype;
	lwres_uint16_t			namelen;
	/* name follows */
} lwres_grbnrequest_t;

typedef struct {
	/* public */
	lwres_uint32_t			flags;
	lwres_uint16_t			rdclass;
	lwres_uint16_t			rdtype;
	lwres_uint32_t			ttl;
	lwres_uint16_t			nrdatas;
	lwres_uint16_t			nsigs;
	/* realname here (len + name) */
	/* rdata here (len + name) */
	/* signatures here (len + name) */
} lwres_grbnresponse_t;

#define LWRDATA_VALIDATED	0x00000001

#define LWRES_ADDRTYPE_V4		0x00000001U	/* ipv4 */
#define LWRES_ADDRTYPE_V6		0x00000002U	/* ipv6 */

#define LWRES_MAX_ALIASES		16		/* max # of aliases */
#define LWRES_MAX_ADDRS			64		/* max # of addrs */

struct tok opcode[] = {
	{ LWRES_OPCODE_NOOP,		"noop", },
	{ LWRES_OPCODE_GETADDRSBYNAME,	"getaddrsbyname", },
	{ LWRES_OPCODE_GETNAMEBYADDR,	"getnamebyaddr", },
	{ LWRES_OPCODE_GETRDATABYNAME,	"getrdatabyname", },
	{ 0, 				NULL, },
};

/* print-domain.c */
extern struct tok ns_type2str[];
extern struct tok ns_class2str[];

static int lwres_printname(size_t, const char *);
static int lwres_printnamelen(const char *);
/* static int lwres_printbinlen(const char *); */
static int lwres_printb64len(const char *);
static int lwres_printaddr(lwres_addr_t *);

static int
lwres_printname(size_t l, const char *p0)
{
	const char *p;
	int i;

	p = p0;
	/* + 1 for terminating \0 */
	if (p + l + 1 > (const char *)snapend)
		goto trunc;

	printf(" ");
	for (i = 0; i < l; i++)
		safeputchar(*p++);
	p++;	/* skip terminating \0 */

	return p - p0;

  trunc:
	return -1;
}

static int
lwres_printnamelen(const char *p)
{
	u_int16_t l;
	int advance;

	if (p + 2 > (const char *)snapend)
		goto trunc;
	l = EXTRACT_16BITS(p);
	advance = lwres_printname(l, p + 2);
	if (advance < 0)
		goto trunc;
	return 2 + advance;

  trunc:
	return -1;
}

#if 0
static int
lwres_printbinlen(const char *p0)
{
	u_int8_t *p;
	u_int16_t l;
	int i;

	p = (u_int8_t *)p0;
	if (p + 2 > (u_int8_t *)snapend)
		goto trunc;
	l = EXTRACT_16BITS(p);
	if (p + 2 + l > (u_int8_t *)snapend)
		goto trunc;
	p += 2;
	for (i = 0; i < l; i++)
		printf("%02x", *p++);
	return p - (u_int8_t *)p0;

  trunc:
	return -1;
}
#endif

static int
lwres_printb64len(const char *p0)
{
	u_int8_t *p;
	u_int16_t l;
	char *dbuf, *b64buf;
	int i;

	p = (u_int8_t *)p0;
	if (p + 2 > (u_int8_t *)snapend)
		goto trunc;
	l = EXTRACT_16BITS(p);
	if (p + 2 + l > (u_int8_t *)snapend)
		goto trunc;

	dbuf = malloc(l + 1);
	if (!dbuf)
	  return -1;

	b64buf = malloc((l + 2) * 4 / 3);
	if (!b64buf)
	  {
	    free(dbuf);
	    return -1;
	  }

	memcpy(dbuf, p, l);
	*(dbuf + l) = (char)0;

	i = b64_ntop (dbuf, l, b64buf, (l + 2) * 4 / 3);
	b64buf[i] = (char)0;
	printf ("%s", b64buf);

	free (dbuf);
	free (b64buf);

	return l + 2;

  trunc:
	return -1;
}

static int
lwres_printaddr(lwres_addr_t *ap)
{
	u_int16_t l;
	const char *p;
	int i;

	TCHECK(ap->length);
	l = ntohs(ap->length);
	/* XXX ap points to packed struct */
	p = (const char *)&ap->length + sizeof(ap->length);
	if (p + l > (const char *)snapend)
		goto trunc;

	switch (ntohl(ap->family)) {
	case 1:	/* IPv4 */
		printf(" %s", ipaddr_string(p));
		p += sizeof(struct in_addr);
		break;
#ifdef INET6
	case 2:	/* IPv6 */
		printf(" %s", ip6addr_string(p));
		p += sizeof(struct in6_addr);
		break;
#endif
	default:
		printf(" %lu/", (unsigned long)ntohl(ap->family));
		for (i = 0; i < l; i++)
			printf("%02x", *p++);
	}

	return p - (const char *)ap;

  trunc:
	return -1;
}

void
lwres_print(const u_char *bp, u_int length)
{
	const struct lwres_lwpacket *np;
	u_int32_t v;
	const char *s;
	int response;
	int advance;
	int unsupported = 0;

	np = (const struct lwres_lwpacket *)bp;
	TCHECK(np->authlength);

	printf(" lwres");
	v = ntohs(np->version);
	if (vflag || v != LWRES_LWPACKETVERSION_0)
		printf(" v%u", v);
	if (v != LWRES_LWPACKETVERSION_0) {
		s = (const char *)np + ntohl(np->length);
		goto tail;
	}

	response = ntohs(np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE;

	/* opcode and pktflags */
	v = (u_int32_t)ntohl(np->opcode);
	s = tok2str(opcode, "#0x%x", v);
	printf(" %s%s", s, response ? "" : "?");

	/* pktflags */
	v = ntohs(np->pktflags);
	if (v & ~LWRES_LWPACKETFLAG_RESPONSE)
		printf("[0x%x]", v);

	if (vflag > 1) {
		printf(" (");	/*)*/
		printf("serial:0x%lx", (unsigned long)ntohl(np->serial));
		printf(" result:0x%lx", (unsigned long)ntohl(np->result));
		printf(" recvlen:%lu", (unsigned long)ntohl(np->recvlength));
		/* BIND910: not used */
		if (vflag > 2) {
			printf(" authtype:0x%x", ntohs(np->authtype));
			printf(" authlen:%u", ntohs(np->authlength));
		}
		/*(*/
		printf(")");
	}

	/* per-opcode content */
	if (!response) {
		/*
		 * queries
		 */
		lwres_gabnrequest_t *gabn;
		lwres_gnbarequest_t *gnba;
		lwres_grbnrequest_t *grbn;
		u_int32_t l;

		gabn = NULL;
		gnba = NULL;
		grbn = NULL;

		switch (ntohl(np->opcode)) {
		case LWRES_OPCODE_NOOP:
			break;
		case LWRES_OPCODE_GETADDRSBYNAME:
			gabn = (lwres_gabnrequest_t *)(np + 1);
			TCHECK(gabn->namelen);
			/* XXX gabn points to packed struct */
			s = (const char *)&gabn->namelen +
			    sizeof(gabn->namelen);
			l = ntohs(gabn->namelen);

			/* BIND910: not used */
			if (vflag > 2) {
				printf(" flags:0x%lx",
				    (unsigned long)ntohl(gabn->flags));
			}

			v = (u_int32_t)ntohl(gabn->addrtypes);
			switch (v & (LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6)) {
			case LWRES_ADDRTYPE_V4:
				printf(" IPv4");
				break;
			case LWRES_ADDRTYPE_V6:
				printf(" IPv6");
				break;
			case LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6:
				printf(" IPv4/6");
				break;
			}
			if (v & ~(LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6))
				printf("[0x%x]", v);

			advance = lwres_printname(l, s);
			if (advance < 0)
				goto trunc;
			s += advance;
			break;
		case LWRES_OPCODE_GETNAMEBYADDR:
			gnba = (lwres_gnbarequest_t *)(np + 1);
			TCHECK(gnba->addr);

			/* BIND910: not used */
			if (vflag > 2) {
				printf(" flags:0x%lx",
				    (unsigned long)ntohl(gnba->flags));
			}

			s = (const char *)&gnba->addr;

			advance = lwres_printaddr(&gnba->addr);
			if (advance < 0)
				goto trunc;
			s += advance;
			break;
		default:
			unsupported++;
			break;
		}
	} else {
		/*
		 * responses
		 */
		lwres_gabnresponse_t *gabn;
		lwres_gnbaresponse_t *gnba;
		lwres_grbnresponse_t *grbn;
		u_int32_t l, na;
		int i;

		gabn = NULL;
		gnba = NULL;
		grbn = NULL;

		switch (ntohl(np->opcode)) {
		case LWRES_OPCODE_NOOP:
			break;
		case LWRES_OPCODE_GETADDRSBYNAME:
			gabn = (lwres_gabnresponse_t *)(np + 1);
			TCHECK(gabn->realnamelen);
			/* XXX gabn points to packed struct */
			s = (const char *)&gabn->realnamelen +
			    sizeof(gabn->realnamelen);
			l = ntohs(gabn->realnamelen);

			/* BIND910: not used */
			if (vflag > 2) {
				printf(" flags:0x%lx",
				    (unsigned long)ntohl(gabn->flags));
			}

			printf(" %u/%u", ntohs(gabn->naliases),
			    ntohs(gabn->naddrs));

			advance = lwres_printname(l, s);
			if (advance < 0)
				goto trunc;
			s += advance;

			/* aliases */
			na = ntohs(gabn->naliases);
			for (i = 0; i < na; i++) {
				advance = lwres_printnamelen(s);
				if (advance < 0)
					goto trunc;
				s += advance;
			}

			/* addrs */
			na = ntohs(gabn->naddrs);
			for (i = 0; i < na; i++) {
				advance = lwres_printaddr((lwres_addr_t *)s);
				if (advance < 0)
					goto trunc;
				s += advance;
			}
			break;
		case LWRES_OPCODE_GETNAMEBYADDR:
			gnba = (lwres_gnbaresponse_t *)(np + 1);
			TCHECK(gnba->realnamelen);
			/* XXX gnba points to packed struct */
			s = (const char *)&gnba->realnamelen +
			    sizeof(gnba->realnamelen);
			l = ntohs(gnba->realnamelen);

			/* BIND910: not used */
			if (vflag > 2) {
				printf(" flags:0x%lx",
				    (unsigned long)ntohl(gnba->flags));
			}

			printf(" %u", ntohs(gnba->naliases));

			advance = lwres_printname(l, s);
			if (advance < 0)
				goto trunc;
			s += advance;

			/* aliases */
			na = ntohs(gnba->naliases);
			for (i = 0; i < na; i++) {
				advance = lwres_printnamelen(s);
				if (advance < 0)
					goto trunc;
				s += advance;
			}
			break;
		case LWRES_OPCODE_GETRDATABYNAME:
			/* XXX no trace, not tested */
			grbn = (lwres_grbnresponse_t *)(np + 1);
			TCHECK(grbn->nsigs);

			/* BIND910: not used */
			if (vflag > 2) {
				printf(" flags:0x%lx",
				    (unsigned long)ntohl(grbn->flags));
			}

			printf(" %s", tok2str(ns_type2str, "Type%d",
			    ntohs(grbn->rdtype)));
			if (ntohs(grbn->rdclass) != C_IN)
				printf(" %s", tok2str(ns_class2str, "Class%d",
				    ntohs(grbn->rdclass)));
			printf(" TTL ");
			relts_print(ntohl(grbn->ttl));
			printf(" %u/%u", ntohs(grbn->nrdatas),
			    ntohs(grbn->nsigs));

			/* XXX grbn points to packed struct */
			s = (const char *)&grbn->nsigs+ sizeof(grbn->nsigs);

			advance = lwres_printnamelen(s);
			if (advance < 0)
				goto trunc;
			s += advance;

			/* rdatas */
			na = ntohs(grbn->nrdatas);
			if (na > 0)
			  printf(" ");

			for (i = 0; i < na; i++) {
				/* XXX should decode resource data */
				advance = lwres_printb64len(s);
				if (advance < 0)
					goto trunc;
				s += advance;
			}

			/* sigs */
			na = ntohs(grbn->nsigs);
			if (na > 0)
			  printf(" ");

			for (i = 0; i < na; i++) {
				/* XXX how should we print it? */
				advance = lwres_printb64len(s);
				if (advance < 0)
					goto trunc;
				s += advance;
			}
			break;
		default:
			unsupported++;
			break;
		}
	}

  tail:
	/* length mismatch */
	if (ntohl(np->length) != length) {
		printf(" [len: %lu != %u]", (unsigned long)ntohl(np->length),
		    length);
	}
	if (!unsupported && s < (const char *)np + ntohl(np->length))
		printf("[extra]");
	return;

  trunc:
	printf("[|lwres]");
	return;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 2001 WIDE Project.
3			* All rights reserved.
4			*
5			* Redistribution and use in source and binary forms, with or without
6			* modification, are permitted provided that the following conditions
7			* are met:
8			* 1. Redistributions of source code must retain the above copyright
9			* notice, this list of conditions and the following disclaimer.
10			* 2. Redistributions in binary form must reproduce the above copyright
11			* notice, this list of conditions and the following disclaimer in the
12			* documentation and/or other materials provided with the distribution.
13			* 3. Neither the name of the project nor the names of its contributors
14			* may be used to endorse or promote products derived from this software
15			* without specific prior written permission.
16			*
17			* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
18			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20			* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
21			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27			* SUCH DAMAGE.
28			*/
29
30			#ifdef HAVE_CONFIG_H
31			#include "config.h"
32			#endif
33
34			#include <sys/time.h>
35
36			#include <netinet/in.h>
37
38			#ifdef NOERROR
39			#undef NOERROR /* Solaris sucks */
40			#endif
41			#ifdef NOERROR
42			#undef T_UNSPEC /* SINIX does too */
43			#endif
44			#include "nameser.h"
45
46			#include <stdio.h>
47			#include <string.h>
48			#include <stdlib.h>
49			#include <resolv.h> /* for b64_ntop() proto */
50
51			#include "interface.h"
52			#include "addrtoname.h"
53			#include "extract.h" /* must come after interface.h */
54
55			/* BIND9 lib/lwres/include/lwres */
56			typedef u_int32_t lwres_uint32_t;
57			typedef u_int16_t lwres_uint16_t;
58			typedef u_int8_t lwres_uint8_t;
59
60			struct lwres_lwpacket {
61			lwres_uint32_t length;
62			lwres_uint16_t version;
63			lwres_uint16_t pktflags;
64			lwres_uint32_t serial;
65			lwres_uint32_t opcode;
66			lwres_uint32_t result;
67			lwres_uint32_t recvlength;
68			lwres_uint16_t authtype;
69			lwres_uint16_t authlength;
70			};
71
72			#define LWRES_LWPACKETFLAG_RESPONSE 0x0001U /* if set, pkt is a response */
73
74			#define LWRES_LWPACKETVERSION_0 0
75
76			#define LWRES_FLAG_TRUSTNOTREQUIRED 0x00000001U
77			#define LWRES_FLAG_SECUREDATA 0x00000002U
78
79			/*
80			* no-op
81			*/
82			#define LWRES_OPCODE_NOOP 0x00000000U
83
84			typedef struct {
85			/* public */
86			lwres_uint16_t datalength;
87			/* data follows */
88			} lwres_nooprequest_t;
89
90			typedef struct {
91			/* public */
92			lwres_uint16_t datalength;
93			/* data follows */
94			} lwres_noopresponse_t;
95
96			/*
97			* get addresses by name
98			*/
99			#define LWRES_OPCODE_GETADDRSBYNAME 0x00010001U
100
101			typedef struct lwres_addr lwres_addr_t;
102
103			struct lwres_addr {
104			lwres_uint32_t family;
105			lwres_uint16_t length;
106			/* address folows */
107			};
108
109			typedef struct {
110			/* public */
111			lwres_uint32_t flags;
112			lwres_uint32_t addrtypes;
113			lwres_uint16_t namelen;
114			/* name follows */
115			} lwres_gabnrequest_t;
116
117			typedef struct {
118			/* public */
119			lwres_uint32_t flags;
120			lwres_uint16_t naliases;
121			lwres_uint16_t naddrs;
122			lwres_uint16_t realnamelen;
123			/* aliases follows */
124			/* addrs follows */
125			/* realname follows */
126			} lwres_gabnresponse_t;
127
128			/*
129			* get name by address
130			*/
131			#define LWRES_OPCODE_GETNAMEBYADDR 0x00010002U
132			typedef struct {
133			/* public */
134			lwres_uint32_t flags;
135			lwres_addr_t addr;
136			/* addr body follows */
137			} lwres_gnbarequest_t;
138
139			typedef struct {
140			/* public */
141			lwres_uint32_t flags;
142			lwres_uint16_t naliases;
143			lwres_uint16_t realnamelen;
144			/* aliases follows */
145			/* realname follows */
146			} lwres_gnbaresponse_t;
147
148			/*
149			* get rdata by name
150			*/
151			#define LWRES_OPCODE_GETRDATABYNAME 0x00010003U
152
153			typedef struct {
154			/* public */
155			lwres_uint32_t flags;
156			lwres_uint16_t rdclass;
157			lwres_uint16_t rdtype;
158			lwres_uint16_t namelen;
159			/* name follows */
160			} lwres_grbnrequest_t;
161
162			typedef struct {
163			/* public */
164			lwres_uint32_t flags;
165			lwres_uint16_t rdclass;
166			lwres_uint16_t rdtype;
167			lwres_uint32_t ttl;
168			lwres_uint16_t nrdatas;
169			lwres_uint16_t nsigs;
170			/* realname here (len + name) */
171			/* rdata here (len + name) */
172			/* signatures here (len + name) */
173			} lwres_grbnresponse_t;
174
175			#define LWRDATA_VALIDATED 0x00000001
176
177			#define LWRES_ADDRTYPE_V4 0x00000001U /* ipv4 */
178			#define LWRES_ADDRTYPE_V6 0x00000002U /* ipv6 */
179
180			#define LWRES_MAX_ALIASES 16 /* max # of aliases */
181			#define LWRES_MAX_ADDRS 64 /* max # of addrs */
182
183			struct tok opcode[] = {
184			{ LWRES_OPCODE_NOOP, "noop", },
185			{ LWRES_OPCODE_GETADDRSBYNAME, "getaddrsbyname", },
186			{ LWRES_OPCODE_GETNAMEBYADDR, "getnamebyaddr", },
187			{ LWRES_OPCODE_GETRDATABYNAME, "getrdatabyname", },
188			{ 0, NULL, },
189			};
190
191			/* print-domain.c */
192			extern struct tok ns_type2str[];
193			extern struct tok ns_class2str[];
194
195			static int lwres_printname(size_t, const char *);
196			static int lwres_printnamelen(const char *);
197			/* static int lwres_printbinlen(const char ); /
198			static int lwres_printb64len(const char *);
199			static int lwres_printaddr(lwres_addr_t *);
200
201			static int
202			lwres_printname(size_t l, const char *p0)
203			{
204			const char *p;
205			int i;
206
207			p = p0;
208			/* + 1 for terminating \0 */
209			if (p + l + 1 > (const char *)snapend)
210			goto trunc;
211
212			printf(" ");
213			for (i = 0; i < l; i++)
214			safeputchar(*p++);
215			p++; /* skip terminating \0 */
216
217			return p - p0;
218
219			trunc:
220			return -1;
221			}
222
223			static int
224			lwres_printnamelen(const char *p)
225			{
226			u_int16_t l;
227			int advance;
228
229			if (p + 2 > (const char *)snapend)
230			goto trunc;
231			l = EXTRACT_16BITS(p);
232			advance = lwres_printname(l, p + 2);
233			if (advance < 0)
234			goto trunc;
235			return 2 + advance;
236
237			trunc:
238			return -1;
239			}
240
241			#if 0
242			static int
243			lwres_printbinlen(const char *p0)
244			{
245			u_int8_t *p;
246			u_int16_t l;
247			int i;
248
249			p = (u_int8_t *)p0;
250			if (p + 2 > (u_int8_t *)snapend)
251			goto trunc;
252			l = EXTRACT_16BITS(p);
253			if (p + 2 + l > (u_int8_t *)snapend)
254			goto trunc;
255			p += 2;
256			for (i = 0; i < l; i++)
257			printf("%02x", *p++);
258			return p - (u_int8_t *)p0;
259
260			trunc:
261			return -1;
262			}
263			#endif
264
265			static int
266			lwres_printb64len(const char *p0)
267			{
268			u_int8_t *p;
269			u_int16_t l;
270			char dbuf, b64buf;
271			int i;
272
273			p = (u_int8_t *)p0;
274			if (p + 2 > (u_int8_t *)snapend)
275			goto trunc;
276			l = EXTRACT_16BITS(p);
277			if (p + 2 + l > (u_int8_t *)snapend)
278			goto trunc;
279
280			dbuf = malloc(l + 1);
281			if (!dbuf)
282			return -1;
283
284			b64buf = malloc((l + 2) * 4 / 3);
285			if (!b64buf)
286			{
287			free(dbuf);
288			return -1;
289			}
290
291			memcpy(dbuf, p, l);
292			*(dbuf + l) = (char)0;
293
294			i = b64_ntop (dbuf, l, b64buf, (l + 2) * 4 / 3);
295			b64buf[i] = (char)0;
296			printf ("%s", b64buf);
297
298			free (dbuf);
299			free (b64buf);
300
301			return l + 2;
302
303			trunc:
304			return -1;
305			}
306
307			static int
308			lwres_printaddr(lwres_addr_t *ap)
309			{
310			u_int16_t l;
311			const char *p;
312			int i;
313
314			TCHECK(ap->length);
315			l = ntohs(ap->length);
316			/* XXX ap points to packed struct */
317			p = (const char *)&ap->length + sizeof(ap->length);
318			if (p + l > (const char *)snapend)
319			goto trunc;
320
321			switch (ntohl(ap->family)) {
322			case 1: /* IPv4 */
323			printf(" %s", ipaddr_string(p));
324			p += sizeof(struct in_addr);
325			break;
326			#ifdef INET6
327			case 2: /* IPv6 */
328			printf(" %s", ip6addr_string(p));
329			p += sizeof(struct in6_addr);
330			break;
331			#endif
332			default:
333			printf(" %lu/", (unsigned long)ntohl(ap->family));
334			for (i = 0; i < l; i++)
335			printf("%02x", *p++);
336			}
337
338			return p - (const char *)ap;
339
340			trunc:
341			return -1;
342			}
343
344			void
345			lwres_print(const u_char *bp, u_int length)
346			{
347			const struct lwres_lwpacket *np;
348			u_int32_t v;
349			const char *s;
350			int response;
351			int advance;
352			int unsupported = 0;
353
354			np = (const struct lwres_lwpacket *)bp;
355			TCHECK(np->authlength);
356
357			printf(" lwres");
358			v = ntohs(np->version);
359			if (vflag \|\| v != LWRES_LWPACKETVERSION_0)
360			printf(" v%u", v);
361			if (v != LWRES_LWPACKETVERSION_0) {
362			s = (const char *)np + ntohl(np->length);
363			goto tail;
364			}
365
366			response = ntohs(np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE;
367
368			/* opcode and pktflags */
369			v = (u_int32_t)ntohl(np->opcode);
370			s = tok2str(opcode, "#0x%x", v);
371			printf(" %s%s", s, response ? "" : "?");
372
373			/* pktflags */
374			v = ntohs(np->pktflags);
375			if (v & ~LWRES_LWPACKETFLAG_RESPONSE)
376			printf("[0x%x]", v);
377
378			if (vflag > 1) {
379			printf(" ("); /)/
380			printf("serial:0x%lx", (unsigned long)ntohl(np->serial));
381			printf(" result:0x%lx", (unsigned long)ntohl(np->result));
382			printf(" recvlen:%lu", (unsigned long)ntohl(np->recvlength));
383			/* BIND910: not used */
384			if (vflag > 2) {
385			printf(" authtype:0x%x", ntohs(np->authtype));
386			printf(" authlen:%u", ntohs(np->authlength));
387			}
388			/(/
389			printf(")");
390			}
391
392			/* per-opcode content */
393			if (!response) {
394			/*
395			* queries
396			*/
397			lwres_gabnrequest_t *gabn;
398			lwres_gnbarequest_t *gnba;
399			lwres_grbnrequest_t *grbn;
400			u_int32_t l;
401
402			gabn = NULL;
403			gnba = NULL;
404			grbn = NULL;
405
406			switch (ntohl(np->opcode)) {
407			case LWRES_OPCODE_NOOP:
408			break;
409			case LWRES_OPCODE_GETADDRSBYNAME:
410			gabn = (lwres_gabnrequest_t *)(np + 1);
411			TCHECK(gabn->namelen);
412			/* XXX gabn points to packed struct */
413			s = (const char *)&gabn->namelen +
414			sizeof(gabn->namelen);
415			l = ntohs(gabn->namelen);
416
417			/* BIND910: not used */
418			if (vflag > 2) {
419			printf(" flags:0x%lx",
420			(unsigned long)ntohl(gabn->flags));
421			}
422
423			v = (u_int32_t)ntohl(gabn->addrtypes);
424			switch (v & (LWRES_ADDRTYPE_V4 \| LWRES_ADDRTYPE_V6)) {
425			case LWRES_ADDRTYPE_V4:
426			printf(" IPv4");
427			break;
428			case LWRES_ADDRTYPE_V6:
429			printf(" IPv6");
430			break;
431			case LWRES_ADDRTYPE_V4 \| LWRES_ADDRTYPE_V6:
432			printf(" IPv4/6");
433			break;
434			}
435			if (v & ~(LWRES_ADDRTYPE_V4 \| LWRES_ADDRTYPE_V6))
436			printf("[0x%x]", v);
437
438			advance = lwres_printname(l, s);
439			if (advance < 0)
440			goto trunc;
441			s += advance;
442			break;
443			case LWRES_OPCODE_GETNAMEBYADDR:
444			gnba = (lwres_gnbarequest_t *)(np + 1);
445			TCHECK(gnba->addr);
446
447			/* BIND910: not used */
448			if (vflag > 2) {
449			printf(" flags:0x%lx",
450			(unsigned long)ntohl(gnba->flags));
451			}
452
453			s = (const char *)&gnba->addr;
454
455			advance = lwres_printaddr(&gnba->addr);
456			if (advance < 0)
457			goto trunc;
458			s += advance;
459			break;
460			default:
461			unsupported++;
462			break;
463			}
464			} else {
465			/*
466			* responses
467			*/
468			lwres_gabnresponse_t *gabn;
469			lwres_gnbaresponse_t *gnba;
470			lwres_grbnresponse_t *grbn;
471			u_int32_t l, na;
472			int i;
473
474			gabn = NULL;
475			gnba = NULL;
476			grbn = NULL;
477
478			switch (ntohl(np->opcode)) {
479			case LWRES_OPCODE_NOOP:
480			break;
481			case LWRES_OPCODE_GETADDRSBYNAME:
482			gabn = (lwres_gabnresponse_t *)(np + 1);
483			TCHECK(gabn->realnamelen);
484			/* XXX gabn points to packed struct */
485			s = (const char *)&gabn->realnamelen +
486			sizeof(gabn->realnamelen);
487			l = ntohs(gabn->realnamelen);
488
489			/* BIND910: not used */
490			if (vflag > 2) {
491			printf(" flags:0x%lx",
492			(unsigned long)ntohl(gabn->flags));
493			}
494
495			printf(" %u/%u", ntohs(gabn->naliases),
496			ntohs(gabn->naddrs));
497
498			advance = lwres_printname(l, s);
499			if (advance < 0)
500			goto trunc;
501			s += advance;
502
503			/* aliases */
504			na = ntohs(gabn->naliases);
505			for (i = 0; i < na; i++) {
506			advance = lwres_printnamelen(s);
507			if (advance < 0)
508			goto trunc;
509			s += advance;
510			}
511
512			/* addrs */
513			na = ntohs(gabn->naddrs);
514			for (i = 0; i < na; i++) {
515			advance = lwres_printaddr((lwres_addr_t *)s);
516			if (advance < 0)
517			goto trunc;
518			s += advance;
519			}
520			break;
521			case LWRES_OPCODE_GETNAMEBYADDR:
522			gnba = (lwres_gnbaresponse_t *)(np + 1);
523			TCHECK(gnba->realnamelen);
524			/* XXX gnba points to packed struct */
525			s = (const char *)&gnba->realnamelen +
526			sizeof(gnba->realnamelen);
527			l = ntohs(gnba->realnamelen);
528
529			/* BIND910: not used */
530			if (vflag > 2) {
531			printf(" flags:0x%lx",
532			(unsigned long)ntohl(gnba->flags));
533			}
534
535			printf(" %u", ntohs(gnba->naliases));
536
537			advance = lwres_printname(l, s);
538			if (advance < 0)
539			goto trunc;
540			s += advance;
541
542			/* aliases */
543			na = ntohs(gnba->naliases);
544			for (i = 0; i < na; i++) {
545			advance = lwres_printnamelen(s);
546			if (advance < 0)
547			goto trunc;
548			s += advance;
549			}
550			break;
551			case LWRES_OPCODE_GETRDATABYNAME:
552			/* XXX no trace, not tested */
553			grbn = (lwres_grbnresponse_t *)(np + 1);
554			TCHECK(grbn->nsigs);
555
556			/* BIND910: not used */
557			if (vflag > 2) {
558			printf(" flags:0x%lx",
559			(unsigned long)ntohl(grbn->flags));
560			}
561
562			printf(" %s", tok2str(ns_type2str, "Type%d",
563			ntohs(grbn->rdtype)));
564			if (ntohs(grbn->rdclass) != C_IN)
565			printf(" %s", tok2str(ns_class2str, "Class%d",
566			ntohs(grbn->rdclass)));
567			printf(" TTL ");
568			relts_print(ntohl(grbn->ttl));
569			printf(" %u/%u", ntohs(grbn->nrdatas),
570			ntohs(grbn->nsigs));
571
572			/* XXX grbn points to packed struct */
573			s = (const char *)&grbn->nsigs+ sizeof(grbn->nsigs);
574
575			advance = lwres_printnamelen(s);
576			if (advance < 0)
577			goto trunc;
578			s += advance;
579
580			/* rdatas */
581			na = ntohs(grbn->nrdatas);
582			if (na > 0)
583			printf(" ");
584
585			for (i = 0; i < na; i++) {
586			/* XXX should decode resource data */
587			advance = lwres_printb64len(s);
588			if (advance < 0)
589			goto trunc;
590			s += advance;
591			}
592
593			/* sigs */
594			na = ntohs(grbn->nsigs);
595			if (na > 0)
596			printf(" ");
597
598			for (i = 0; i < na; i++) {
599			/* XXX how should we print it? */
600			advance = lwres_printb64len(s);
601			if (advance < 0)
602			goto trunc;
603			s += advance;
604			}
605			break;
606			default:
607			unsupported++;
608			break;
609			}
610			}
611
612			tail:
613			/* length mismatch */
614			if (ntohl(np->length) != length) {
615			printf(" [len: %lu != %u]", (unsigned long)ntohl(np->length),
616			length);
617			}
618			if (!unsupported && s < (const char *)np + ntohl(np->length))
619			printf("[extra]");
620			return;
621
622			trunc:
623			printf("[\|lwres]");
624			return;
625			}