diff options
Diffstat (limited to 'contrib/tcpdump/print-lwres.c')
| -rw-r--r-- | contrib/tcpdump/print-lwres.c | 601 |
1 files changed, 601 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-lwres.c b/contrib/tcpdump/print-lwres.c new file mode 100644 index 0000000..aad4eee --- /dev/null +++ b/contrib/tcpdump/print-lwres.c @@ -0,0 +1,601 @@ +/* + * 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. + */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-lwres.c,v 1.13 2004-03-24 01:54:29 guy Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#include "nameser.h" + +#include <stdio.h> +#include <string.h> + +#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_printaddr(lwres_addr_t *); + +static int +lwres_printname(size_t l, const char *p0) +{ + const char *p; + size_t 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; +} + +static int +lwres_printbinlen(const char *p0) +{ + const char *p; + u_int16_t l; + int i; + + p = p0; + if (p + 2 > (const char *)snapend) + goto trunc; + l = EXTRACT_16BITS(p); + if (p + 2 + l > (const char *)snapend) + goto trunc; + p += 2; + for (i = 0; i < l; i++) + printf("%02x", *p++); + return p - p0; + + trunc: + return -1; +} + +static int +lwres_printaddr(lwres_addr_t *ap) +{ + u_int16_t l; + const char *p; + int i; + + TCHECK(ap->length); + l = EXTRACT_16BITS(&ap->length); + /* XXX ap points to packed struct */ + p = (const char *)&ap->length + sizeof(ap->length); + TCHECK2(*p, l); + + switch (EXTRACT_32BITS(&ap->family)) { + case 1: /* IPv4 */ + if (l < 4) + return -1; + printf(" %s", ipaddr_string(p)); + p += sizeof(struct in_addr); + break; +#ifdef INET6 + case 2: /* IPv6 */ + if (l < 16) + return -1; + printf(" %s", ip6addr_string(p)); + p += sizeof(struct in6_addr); + break; +#endif + default: + printf(" %u/", EXTRACT_32BITS(&ap->family)); + for (i = 0; i < l; i++) + printf("%02x", *p++); + } + + return p - (const char *)ap; + + trunc: + return -1; +} + +void +lwres_print(register 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 = EXTRACT_16BITS(&np->version); + if (vflag || v != LWRES_LWPACKETVERSION_0) + printf(" v%u", v); + if (v != LWRES_LWPACKETVERSION_0) { + s = (const char *)np + EXTRACT_32BITS(&np->length); + goto tail; + } + + response = EXTRACT_16BITS(&np->pktflags) & LWRES_LWPACKETFLAG_RESPONSE; + + /* opcode and pktflags */ + v = EXTRACT_32BITS(&np->opcode); + s = tok2str(opcode, "#0x%x", v); + printf(" %s%s", s, response ? "" : "?"); + + /* pktflags */ + v = EXTRACT_16BITS(&np->pktflags); + if (v & ~LWRES_LWPACKETFLAG_RESPONSE) + printf("[0x%x]", v); + + if (vflag > 1) { + printf(" ("); /*)*/ + printf("serial:0x%x", EXTRACT_32BITS(&np->serial)); + printf(" result:0x%x", EXTRACT_32BITS(&np->result)); + printf(" recvlen:%u", EXTRACT_32BITS(&np->recvlength)); + /* BIND910: not used */ + if (vflag > 2) { + printf(" authtype:0x%x", EXTRACT_16BITS(&np->authtype)); + printf(" authlen:%u", EXTRACT_16BITS(&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 (EXTRACT_32BITS(&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 = EXTRACT_16BITS(&gabn->namelen); + + /* BIND910: not used */ + if (vflag > 2) { + printf(" flags:0x%x", + EXTRACT_32BITS(&gabn->flags)); + } + + v = EXTRACT_32BITS(&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%x", + EXTRACT_32BITS(&gnba->flags)); + } + + s = (const char *)&gnba->addr; + + advance = lwres_printaddr(&gnba->addr); + if (advance < 0) + goto trunc; + s += advance; + break; + case LWRES_OPCODE_GETRDATABYNAME: + /* XXX no trace, not tested */ + grbn = (lwres_grbnrequest_t *)(np + 1); + TCHECK(grbn->namelen); + + /* BIND910: not used */ + if (vflag > 2) { + printf(" flags:0x%x", + EXTRACT_32BITS(&grbn->flags)); + } + + printf(" %s", tok2str(ns_type2str, "Type%d", + EXTRACT_16BITS(&grbn->rdtype))); + if (EXTRACT_16BITS(&grbn->rdclass) != C_IN) { + printf(" %s", tok2str(ns_class2str, "Class%d", + EXTRACT_16BITS(&grbn->rdclass))); + } + + /* XXX grbn points to packed struct */ + s = (const char *)&grbn->namelen + + sizeof(grbn->namelen); + l = EXTRACT_16BITS(&grbn->namelen); + + advance = lwres_printname(l, s); + 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; + u_int32_t i; + + gabn = NULL; + gnba = NULL; + grbn = NULL; + + switch (EXTRACT_32BITS(&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 = EXTRACT_16BITS(&gabn->realnamelen); + + /* BIND910: not used */ + if (vflag > 2) { + printf(" flags:0x%x", + EXTRACT_32BITS(&gabn->flags)); + } + + printf(" %u/%u", EXTRACT_16BITS(&gabn->naliases), + EXTRACT_16BITS(&gabn->naddrs)); + + advance = lwres_printname(l, s); + if (advance < 0) + goto trunc; + s += advance; + + /* aliases */ + na = EXTRACT_16BITS(&gabn->naliases); + for (i = 0; i < na; i++) { + advance = lwres_printnamelen(s); + if (advance < 0) + goto trunc; + s += advance; + } + + /* addrs */ + na = EXTRACT_16BITS(&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 = EXTRACT_16BITS(&gnba->realnamelen); + + /* BIND910: not used */ + if (vflag > 2) { + printf(" flags:0x%x", + EXTRACT_32BITS(&gnba->flags)); + } + + printf(" %u", EXTRACT_16BITS(&gnba->naliases)); + + advance = lwres_printname(l, s); + if (advance < 0) + goto trunc; + s += advance; + + /* aliases */ + na = EXTRACT_16BITS(&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%x", + EXTRACT_32BITS(&grbn->flags)); + } + + printf(" %s", tok2str(ns_type2str, "Type%d", + EXTRACT_16BITS(&grbn->rdtype))); + if (EXTRACT_16BITS(&grbn->rdclass) != C_IN) { + printf(" %s", tok2str(ns_class2str, "Class%d", + EXTRACT_16BITS(&grbn->rdclass))); + } + printf(" TTL "); + relts_print(EXTRACT_32BITS(&grbn->ttl)); + printf(" %u/%u", EXTRACT_16BITS(&grbn->nrdatas), + EXTRACT_16BITS(&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 = EXTRACT_16BITS(&grbn->nrdatas); + for (i = 0; i < na; i++) { + /* XXX should decode resource data */ + advance = lwres_printbinlen(s); + if (advance < 0) + goto trunc; + s += advance; + } + + /* sigs */ + na = EXTRACT_16BITS(&grbn->nsigs); + for (i = 0; i < na; i++) { + /* XXX how should we print it? */ + advance = lwres_printbinlen(s); + if (advance < 0) + goto trunc; + s += advance; + } + break; + default: + unsupported++; + break; + } + } + + tail: + /* length mismatch */ + if (EXTRACT_32BITS(&np->length) != length) { + printf(" [len: %u != %u]", EXTRACT_32BITS(&np->length), + length); + } + if (!unsupported && s < (const char *)np + EXTRACT_32BITS(&np->length)) + printf("[extra]"); + return; + + trunc: + printf("[|lwres]"); + return; +} |
