Adding upstream version 4.99.4.upstream/4.99.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 555 insertions, 0 deletions

diff --git a/print-lwres.c b/print-lwres.c
new file mode 100644
index 0000000..97f176c
--- /dev/null
+++ b/print-lwres.c
@@ -0,0 +1,555 @@
+/*
+ * 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.
+ */
+
+/* \summary: BIND9 Lightweight Resolver protocol printer */
+
+#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"
+
+#include "nameser.h"
+
+/* BIND9 lib/lwres/include/lwres */
+/*
+ * Use nd_uint16_t for lwres_uint16_t
+ * Use nd_uint32_t for lwres_uint32_t
+*/
+
+struct lwres_lwpacket {
+	nd_uint32_t		length;
+	nd_uint16_t		version;
+	nd_uint16_t		pktflags;
+	nd_uint32_t		serial;
+	nd_uint32_t		opcode;
+	nd_uint32_t		result;
+	nd_uint32_t		recvlength;
+	nd_uint16_t		authtype;
+	nd_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 */
+	nd_uint16_t			datalength;
+	/* data follows */
+} lwres_nooprequest_t;
+
+typedef struct {
+	/* public */
+	nd_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 {
+	nd_uint32_t			family;
+	nd_uint16_t			length;
+	/* address follows */
+};
+#define LWRES_ADDR_LEN			6
+
+typedef struct {
+	/* public */
+	nd_uint32_t			flags;
+	nd_uint32_t			addrtypes;
+	nd_uint16_t			namelen;
+	/* name follows */
+} lwres_gabnrequest_t;
+#define LWRES_GABNREQUEST_LEN		10
+
+typedef struct {
+	/* public */
+	nd_uint32_t			flags;
+	nd_uint16_t			naliases;
+	nd_uint16_t			naddrs;
+	nd_uint16_t			realnamelen;
+	/* aliases follows */
+	/* addrs follows */
+	/* realname follows */
+} lwres_gabnresponse_t;
+#define LWRES_GABNRESPONSE_LEN		10
+
+/*
+ * get name by address
+ */
+#define LWRES_OPCODE_GETNAMEBYADDR	0x00010002U
+typedef struct {
+	/* public */
+	nd_uint32_t			flags;
+	/* addr follows */
+} lwres_gnbarequest_t;
+#define LWRES_GNBAREQUEST_LEN		4
+
+typedef struct {
+	/* public */
+	nd_uint32_t			flags;
+	nd_uint16_t			naliases;
+	nd_uint16_t			realnamelen;
+	/* aliases follows */
+	/* realname follows */
+} lwres_gnbaresponse_t;
+#define LWRES_GNBARESPONSE_LEN		8
+
+/*
+ * get rdata by name
+ */
+#define LWRES_OPCODE_GETRDATABYNAME	0x00010003U
+
+typedef struct {
+	/* public */
+	nd_uint32_t			flags;
+	nd_uint16_t			rdclass;
+	nd_uint16_t			rdtype;
+	nd_uint16_t			namelen;
+	/* name follows */
+} lwres_grbnrequest_t;
+#define LWRES_GRBNREQUEST_LEN		10
+
+typedef struct {
+	/* public */
+	nd_uint32_t			flags;
+	nd_uint16_t			rdclass;
+	nd_uint16_t			rdtype;
+	nd_uint32_t			ttl;
+	nd_uint16_t			nrdatas;
+	nd_uint16_t			nsigs;
+	/* realname here (len + name) */
+	/* rdata here (len + name) */
+	/* signatures here (len + name) */
+} lwres_grbnresponse_t;
+#define LWRES_GRBNRESPONSE_LEN		16
+
+#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 */
+
+static const 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 const struct tok ns_type2str[];
+extern const struct tok ns_class2str[];
+
+static unsigned
+lwres_printname(netdissect_options *ndo,
+                u_int l, const u_char *p0)
+{
+	ND_PRINT(" ");
+	(void)nd_printn(ndo, p0, l, NULL);
+	p0 += l;
+	if (GET_U_1(p0))
+		ND_PRINT(" (not NUL-terminated!)");
+	return l + 1;
+}
+
+static unsigned
+lwres_printnamelen(netdissect_options *ndo,
+                   const u_char *p)
+{
+	uint16_t l;
+	int advance;
+
+	l = GET_BE_U_2(p);
+	advance = lwres_printname(ndo, l, p + 2);
+	return 2 + advance;
+}
+
+static unsigned
+lwres_printbinlen(netdissect_options *ndo,
+                  const u_char *p0)
+{
+	const u_char *p;
+	uint16_t l;
+	int i;
+
+	p = p0;
+	l = GET_BE_U_2(p);
+	p += 2;
+	for (i = 0; i < l; i++) {
+		ND_PRINT("%02x", GET_U_1(p));
+		p++;
+	}
+	return 2 + l;
+}
+
+static int
+lwres_printaddr(netdissect_options *ndo,
+                const u_char *p0)
+{
+	const u_char *p;
+	const lwres_addr_t *ap;
+	uint16_t l;
+	int i;
+
+	p = p0;
+	ap = (const lwres_addr_t *)p;
+	l = GET_BE_U_2(ap->length);
+	p += LWRES_ADDR_LEN;
+	ND_TCHECK_LEN(p, l);
+
+	switch (GET_BE_U_4(ap->family)) {
+	case 1:	/* IPv4 */
+		if (l < 4)
+			return -1;
+		ND_PRINT(" %s", GET_IPADDR_STRING(p));
+		p += sizeof(nd_ipv4);
+		break;
+	case 2:	/* IPv6 */
+		if (l < 16)
+			return -1;
+		ND_PRINT(" %s", GET_IP6ADDR_STRING(p));
+		p += sizeof(nd_ipv6);
+		break;
+	default:
+		ND_PRINT(" %u/", GET_BE_U_4(ap->family));
+		for (i = 0; i < l; i++) {
+			ND_PRINT("%02x", GET_U_1(p));
+			p++;
+		}
+	}
+
+	return ND_BYTES_BETWEEN(p, p0);
+}
+
+void
+lwres_print(netdissect_options *ndo,
+            const u_char *bp, u_int length)
+{
+	const u_char *p;
+	const struct lwres_lwpacket *np;
+	uint32_t v;
+	const u_char *s;
+	int response;
+	int advance;
+	int unsupported = 0;
+
+	ndo->ndo_protocol = "lwres";
+	np = (const struct lwres_lwpacket *)bp;
+	ND_TCHECK_2(np->authlength);
+
+	ND_PRINT(" lwres");
+	v = GET_BE_U_2(np->version);
+	if (ndo->ndo_vflag || v != LWRES_LWPACKETVERSION_0)
+		ND_PRINT(" v%u", v);
+	if (v != LWRES_LWPACKETVERSION_0) {
+		s = bp + GET_BE_U_4(np->length);
+		goto tail;
+	}
+
+	response = GET_BE_U_2(np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE;
+
+	/* opcode and pktflags */
+	v = GET_BE_U_4(np->opcode);
+	ND_PRINT(" %s%s", tok2str(opcode, "#0x%x", v), response ? "" : "?");
+
+	/* pktflags */
+	v = GET_BE_U_2(np->pktflags);
+	if (v & ~LWRES_LWPACKETFLAG_RESPONSE)
+		ND_PRINT("[0x%x]", v);
+
+	if (ndo->ndo_vflag > 1) {
+		ND_PRINT(" (");	/*)*/
+		ND_PRINT("serial:0x%x", GET_BE_U_4(np->serial));
+		ND_PRINT(" result:0x%x", GET_BE_U_4(np->result));
+		ND_PRINT(" recvlen:%u", GET_BE_U_4(np->recvlength));
+		/* BIND910: not used */
+		if (ndo->ndo_vflag > 2) {
+			ND_PRINT(" authtype:0x%x", GET_BE_U_2(np->authtype));
+			ND_PRINT(" authlen:%u", GET_BE_U_2(np->authlength));
+		}
+		/*(*/
+		ND_PRINT(")");
+	}
+
+	/* per-opcode content */
+	if (!response) {
+		/*
+		 * queries
+		 */
+		const lwres_gabnrequest_t *gabn;
+		const lwres_gnbarequest_t *gnba;
+		const lwres_grbnrequest_t *grbn;
+		uint32_t l;
+
+		gabn = NULL;
+		gnba = NULL;
+		grbn = NULL;
+
+		p = (const u_char *)(np + 1);
+		switch (GET_BE_U_4(np->opcode)) {
+		case LWRES_OPCODE_NOOP:
+			s = p;
+			break;
+		case LWRES_OPCODE_GETADDRSBYNAME:
+			gabn = (const lwres_gabnrequest_t *)p;
+			ND_TCHECK_2(gabn->namelen);
+
+			/* BIND910: not used */
+			if (ndo->ndo_vflag > 2) {
+				ND_PRINT(" flags:0x%x",
+				    GET_BE_U_4(gabn->flags));
+			}
+
+			v = GET_BE_U_4(gabn->addrtypes);
+			switch (v & (LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6)) {
+			case LWRES_ADDRTYPE_V4:
+				ND_PRINT(" IPv4");
+				break;
+			case LWRES_ADDRTYPE_V6:
+				ND_PRINT(" IPv6");
+				break;
+			case LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6:
+				ND_PRINT(" IPv4/6");
+				break;
+			}
+			if (v & ~(LWRES_ADDRTYPE_V4 | LWRES_ADDRTYPE_V6))
+				ND_PRINT("[0x%x]", v);
+
+			s = p + LWRES_GABNREQUEST_LEN;
+			l = GET_BE_U_2(gabn->namelen);
+			advance = lwres_printname(ndo, l, s);
+			s += advance;
+			break;
+		case LWRES_OPCODE_GETNAMEBYADDR:
+			gnba = (const lwres_gnbarequest_t *)p;
+			ND_TCHECK_4(gnba->flags);
+
+			/* BIND910: not used */
+			if (ndo->ndo_vflag > 2) {
+				ND_PRINT(" flags:0x%x",
+				    GET_BE_U_4(gnba->flags));
+			}
+
+			s = p + LWRES_GNBAREQUEST_LEN;
+			advance = lwres_printaddr(ndo, s);
+			if (advance < 0)
+				goto invalid;
+			s += advance;
+			break;
+		case LWRES_OPCODE_GETRDATABYNAME:
+			/* XXX no trace, not tested */
+			grbn = (const lwres_grbnrequest_t *)p;
+			ND_TCHECK_2(grbn->namelen);
+
+			/* BIND910: not used */
+			if (ndo->ndo_vflag > 2) {
+				ND_PRINT(" flags:0x%x",
+				    GET_BE_U_4(grbn->flags));
+			}
+
+			ND_PRINT(" %s", tok2str(ns_type2str, "Type%u",
+			    GET_BE_U_2(grbn->rdtype)));
+			if (GET_BE_U_2(grbn->rdclass) != C_IN) {
+				ND_PRINT(" %s", tok2str(ns_class2str, "Class%u",
+				    GET_BE_U_2(grbn->rdclass)));
+			}
+
+			s = p + LWRES_GRBNREQUEST_LEN;
+			l = GET_BE_U_2(grbn->namelen);
+			advance = lwres_printname(ndo, l, s);
+			s += advance;
+			break;
+		default:
+			s = p;
+			unsupported++;
+			break;
+		}
+	} else {
+		/*
+		 * responses
+		 */
+		const lwres_gabnresponse_t *gabn;
+		const lwres_gnbaresponse_t *gnba;
+		const lwres_grbnresponse_t *grbn;
+		uint32_t l, na;
+		uint32_t i;
+
+		gabn = NULL;
+		gnba = NULL;
+		grbn = NULL;
+
+		p = (const u_char *)(np + 1);
+		switch (GET_BE_U_4(np->opcode)) {
+		case LWRES_OPCODE_NOOP:
+			s = p;
+			break;
+		case LWRES_OPCODE_GETADDRSBYNAME:
+			gabn = (const lwres_gabnresponse_t *)p;
+			ND_TCHECK_2(gabn->realnamelen);
+
+			/* BIND910: not used */
+			if (ndo->ndo_vflag > 2) {
+				ND_PRINT(" flags:0x%x",
+				    GET_BE_U_4(gabn->flags));
+			}
+
+			ND_PRINT(" %u/%u", GET_BE_U_2(gabn->naliases),
+				  GET_BE_U_2(gabn->naddrs));
+
+			s = p + LWRES_GABNRESPONSE_LEN;
+			l = GET_BE_U_2(gabn->realnamelen);
+			advance = lwres_printname(ndo, l, s);
+			s += advance;
+
+			/* aliases */
+			na = GET_BE_U_2(gabn->naliases);
+			for (i = 0; i < na; i++) {
+				advance = lwres_printnamelen(ndo, s);
+				s += advance;
+			}
+
+			/* addrs */
+			na = GET_BE_U_2(gabn->naddrs);
+			for (i = 0; i < na; i++) {
+				advance = lwres_printaddr(ndo, s);
+				if (advance < 0)
+					goto invalid;
+				s += advance;
+			}
+			break;
+		case LWRES_OPCODE_GETNAMEBYADDR:
+			gnba = (const lwres_gnbaresponse_t *)p;
+			ND_TCHECK_2(gnba->realnamelen);
+
+			/* BIND910: not used */
+			if (ndo->ndo_vflag > 2) {
+				ND_PRINT(" flags:0x%x",
+				    GET_BE_U_4(gnba->flags));
+			}
+
+			ND_PRINT(" %u", GET_BE_U_2(gnba->naliases));
+
+			s = p + LWRES_GNBARESPONSE_LEN;
+			l = GET_BE_U_2(gnba->realnamelen);
+			advance = lwres_printname(ndo, l, s);
+			s += advance;
+
+			/* aliases */
+			na = GET_BE_U_2(gnba->naliases);
+			for (i = 0; i < na; i++) {
+				advance = lwres_printnamelen(ndo, s);
+				s += advance;
+			}
+			break;
+		case LWRES_OPCODE_GETRDATABYNAME:
+			/* XXX no trace, not tested */
+			grbn = (const lwres_grbnresponse_t *)p;
+			ND_TCHECK_2(grbn->nsigs);
+
+			/* BIND910: not used */
+			if (ndo->ndo_vflag > 2) {
+				ND_PRINT(" flags:0x%x",
+				    GET_BE_U_4(grbn->flags));
+			}
+
+			ND_PRINT(" %s", tok2str(ns_type2str, "Type%u",
+			    GET_BE_U_2(grbn->rdtype)));
+			if (GET_BE_U_2(grbn->rdclass) != C_IN) {
+				ND_PRINT(" %s", tok2str(ns_class2str, "Class%u",
+				    GET_BE_U_2(grbn->rdclass)));
+			}
+			ND_PRINT(" TTL ");
+			unsigned_relts_print(ndo,
+					     GET_BE_U_4(grbn->ttl));
+			ND_PRINT(" %u/%u", GET_BE_U_2(grbn->nrdatas),
+				  GET_BE_U_2(grbn->nsigs));
+
+			s = p + LWRES_GRBNRESPONSE_LEN;
+			advance = lwres_printnamelen(ndo, s);
+			s += advance;
+
+			/* rdatas */
+			na = GET_BE_U_2(grbn->nrdatas);
+			for (i = 0; i < na; i++) {
+				/* XXX should decode resource data */
+				advance = lwres_printbinlen(ndo, s);
+				s += advance;
+			}
+
+			/* sigs */
+			na = GET_BE_U_2(grbn->nsigs);
+			for (i = 0; i < na; i++) {
+				/* XXX how should we print it? */
+				advance = lwres_printbinlen(ndo, s);
+				s += advance;
+			}
+			break;
+		default:
+			s = p;
+			unsupported++;
+			break;
+		}
+	}
+
+  tail:
+	/* length mismatch */
+	if (GET_BE_U_4(np->length) != length) {
+		ND_PRINT(" [len: %u != %u]", GET_BE_U_4(np->length),
+			  length);
+	}
+	if (!unsupported && ND_BYTES_BETWEEN(s, bp) < GET_BE_U_4(np->length))
+		ND_PRINT("[extra]");
+	return;
+
+  invalid:
+	nd_print_invalid(ndo);
+}