| /* |
| * 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 */ |
| |
| 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 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; |
| } |