/* * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 2000-2003 Internet Software Consortium. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR * PERFORMANCE OF THIS SOFTWARE. */ /* $ISC: nsupdate.c,v 1.103.2.15.2.20 2005/03/17 03:58:26 marka Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_ADDRINFO #ifdef HAVE_GETADDRINFO #ifdef HAVE_GAISTRERROR #define USE_GETADDRINFO #endif #endif #endif #ifndef USE_GETADDRINFO #ifndef ISC_PLATFORM_NONSTDHERRNO extern int h_errno; #endif #endif #define MAXCMD (4 * 1024) #define MAXWIRE (64 * 1024) #define PACKETSIZE ((64 * 1024) - 1) #define INITTEXT (2 * 1024) #define MAXTEXT (128 * 1024) #define FIND_TIMEOUT 5 #define TTL_MAX 2147483647U /* Maximum signed 32 bit integer. */ #define DNSDEFAULTPORT 53 #ifndef RESOLV_CONF #define RESOLV_CONF "/etc/resolv.conf" #endif static isc_boolean_t debugging = ISC_FALSE, ddebugging = ISC_FALSE; static isc_boolean_t memdebugging = ISC_FALSE; static isc_boolean_t have_ipv4 = ISC_FALSE; static isc_boolean_t have_ipv6 = ISC_FALSE; static isc_boolean_t is_dst_up = ISC_FALSE; static isc_boolean_t usevc = ISC_FALSE; static isc_taskmgr_t *taskmgr = NULL; static isc_task_t *global_task = NULL; static isc_event_t *global_event = NULL; static isc_mem_t *mctx = NULL; static dns_dispatchmgr_t *dispatchmgr = NULL; static dns_requestmgr_t *requestmgr = NULL; static isc_socketmgr_t *socketmgr = NULL; static isc_timermgr_t *timermgr = NULL; static dns_dispatch_t *dispatchv4 = NULL; static dns_dispatch_t *dispatchv6 = NULL; static dns_message_t *updatemsg = NULL; static dns_fixedname_t fuserzone; static dns_name_t *userzone = NULL; static dns_tsigkey_t *tsigkey = NULL; static dst_key_t *sig0key; static lwres_context_t *lwctx = NULL; static lwres_conf_t *lwconf; static isc_sockaddr_t *servers; static int ns_inuse = 0; static int ns_total = 0; static isc_sockaddr_t *userserver = NULL; static isc_sockaddr_t *localaddr = NULL; static char *keystr = NULL, *keyfile = NULL; static isc_entropy_t *entp = NULL; static isc_boolean_t shuttingdown = ISC_FALSE; static FILE *input; static isc_boolean_t interactive = ISC_TRUE; static isc_boolean_t seenerror = ISC_FALSE; static const dns_master_style_t *style; static int requests = 0; static unsigned int timeout = 300; static unsigned int udp_timeout = 3; static unsigned int udp_retries = 3; static dns_rdataclass_t defaultclass = dns_rdataclass_in; static dns_rdataclass_t zoneclass = dns_rdataclass_none; static dns_message_t *answer = NULL; typedef struct nsu_requestinfo { dns_message_t *msg; isc_sockaddr_t *addr; } nsu_requestinfo_t; static void sendrequest(isc_sockaddr_t *srcaddr, isc_sockaddr_t *destaddr, dns_message_t *msg, dns_request_t **request); static void fatal(const char *format, ...) ISC_FORMAT_PRINTF(1, 2); static void debug(const char *format, ...) ISC_FORMAT_PRINTF(1, 2); static void ddebug(const char *format, ...) ISC_FORMAT_PRINTF(1, 2); #define STATUS_MORE (isc_uint16_t)0 #define STATUS_SEND (isc_uint16_t)1 #define STATUS_QUIT (isc_uint16_t)2 #define STATUS_SYNTAX (isc_uint16_t)3 static dns_rdataclass_t getzoneclass(void) { if (zoneclass == dns_rdataclass_none) zoneclass = defaultclass; return (zoneclass); } static isc_boolean_t setzoneclass(dns_rdataclass_t rdclass) { if (zoneclass == dns_rdataclass_none || rdclass == dns_rdataclass_none) zoneclass = rdclass; if (zoneclass != rdclass) return (ISC_FALSE); return (ISC_TRUE); } static void fatal(const char *format, ...) { va_list args; va_start(args, format); vfprintf(stderr, format, args); va_end(args); fprintf(stderr, "\n"); exit(1); } static void debug(const char *format, ...) { va_list args; if (debugging) { va_start(args, format); vfprintf(stderr, format, args); va_end(args); fprintf(stderr, "\n"); } } static void ddebug(const char *format, ...) { va_list args; if (ddebugging) { va_start(args, format); vfprintf(stderr, format, args); va_end(args); fprintf(stderr, "\n"); } } static inline void check_result(isc_result_t result, const char *msg) { if (result != ISC_R_SUCCESS) fatal("%s: %s", msg, isc_result_totext(result)); } static void * mem_alloc(void *arg, size_t size) { return (isc_mem_get(arg, size)); } static void mem_free(void *arg, void *mem, size_t size) { isc_mem_put(arg, mem, size); } static char * nsu_strsep(char **stringp, const char *delim) { char *string = *stringp; char *s; const char *d; char sc, dc; if (string == NULL) return (NULL); for (; *string != '\0'; string++) { sc = *string; for (d = delim; (dc = *d) != '\0'; d++) { if (sc == dc) break; } if (dc == 0) break; } for (s = string; *s != '\0'; s++) { sc = *s; for (d = delim; (dc = *d) != '\0'; d++) { if (sc == dc) { *s++ = '\0'; *stringp = s; return (string); } } } *stringp = NULL; return (string); } static void reset_system(void) { isc_result_t result; ddebug("reset_system()"); /* If the update message is still around, destroy it */ if (updatemsg != NULL) dns_message_reset(updatemsg, DNS_MESSAGE_INTENTRENDER); else { result = dns_message_create(mctx, DNS_MESSAGE_INTENTRENDER, &updatemsg); check_result(result, "dns_message_create"); } updatemsg->opcode = dns_opcode_update; } static void setup_keystr(void) { unsigned char *secret = NULL; int secretlen; isc_buffer_t secretbuf; isc_result_t result; isc_buffer_t keynamesrc; char *secretstr; char *s; dns_fixedname_t fkeyname; dns_name_t *keyname; dns_fixedname_init(&fkeyname); keyname = dns_fixedname_name(&fkeyname); debug("Creating key..."); s = strchr(keystr, ':'); if (s == NULL || s == keystr || *s == 0) fatal("key option must specify keyname:secret"); secretstr = s + 1; isc_buffer_init(&keynamesrc, keystr, s - keystr); isc_buffer_add(&keynamesrc, s - keystr); debug("namefromtext"); result = dns_name_fromtext(keyname, &keynamesrc, dns_rootname, ISC_FALSE, NULL); check_result(result, "dns_name_fromtext"); secretlen = strlen(secretstr) * 3 / 4; secret = isc_mem_allocate(mctx, secretlen); if (secret == NULL) fatal("out of memory"); isc_buffer_init(&secretbuf, secret, secretlen); result = isc_base64_decodestring(secretstr, &secretbuf); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not create key from %s: %s\n", keystr, isc_result_totext(result)); goto failure; } secretlen = isc_buffer_usedlength(&secretbuf); debug("keycreate"); result = dns_tsigkey_create(keyname, dns_tsig_hmacmd5_name, secret, secretlen, ISC_TRUE, NULL, 0, 0, mctx, NULL, &tsigkey); if (result != ISC_R_SUCCESS) fprintf(stderr, "could not create key from %s: %s\n", keystr, dns_result_totext(result)); failure: if (secret != NULL) isc_mem_free(mctx, secret); } static void setup_keyfile(void) { dst_key_t *dstkey = NULL; isc_result_t result; debug("Creating key..."); result = dst_key_fromnamedfile(keyfile, DST_TYPE_PRIVATE | DST_TYPE_KEY, mctx, &dstkey); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not read key from %s: %s\n", keyfile, isc_result_totext(result)); return; } if (dst_key_alg(dstkey) == DST_ALG_HMACMD5) { result = dns_tsigkey_createfromkey(dst_key_name(dstkey), dns_tsig_hmacmd5_name, dstkey, ISC_FALSE, NULL, 0, 0, mctx, NULL, &tsigkey); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not create key from %s: %s\n", keyfile, isc_result_totext(result)); dst_key_free(&dstkey); return; } } else sig0key = dstkey; } static void doshutdown(void) { isc_task_detach(&global_task); if (userserver != NULL) isc_mem_put(mctx, userserver, sizeof(isc_sockaddr_t)); if (localaddr != NULL) isc_mem_put(mctx, localaddr, sizeof(isc_sockaddr_t)); if (tsigkey != NULL) { ddebug("Freeing TSIG key"); dns_tsigkey_detach(&tsigkey); } if (sig0key != NULL) { ddebug("Freeing SIG(0) key"); dst_key_free(&sig0key); } if (updatemsg != NULL) dns_message_destroy(&updatemsg); if (is_dst_up) { ddebug("Destroy DST lib"); dst_lib_destroy(); is_dst_up = ISC_FALSE; } if (entp != NULL) { ddebug("Detach from entropy"); isc_entropy_detach(&entp); } lwres_conf_clear(lwctx); lwres_context_destroy(&lwctx); isc_mem_put(mctx, servers, ns_total * sizeof(isc_sockaddr_t)); ddebug("Destroying request manager"); dns_requestmgr_detach(&requestmgr); ddebug("Freeing the dispatchers"); if (have_ipv4) dns_dispatch_detach(&dispatchv4); if (have_ipv6) dns_dispatch_detach(&dispatchv6); ddebug("Shutting down dispatch manager"); dns_dispatchmgr_destroy(&dispatchmgr); } static void maybeshutdown(void) { ddebug("Shutting down request manager"); dns_requestmgr_shutdown(requestmgr); if (requests != 0) return; doshutdown(); } static void shutdown_program(isc_task_t *task, isc_event_t *event) { REQUIRE(task == global_task); UNUSED(task); ddebug("shutdown_program()"); isc_event_free(&event); shuttingdown = ISC_TRUE; maybeshutdown(); } static void setup_system(void) { isc_result_t result; isc_sockaddr_t bind_any, bind_any6; lwres_result_t lwresult; unsigned int attrs, attrmask; int i; ddebug("setup_system()"); dns_result_register(); result = isc_net_probeipv4(); if (result == ISC_R_SUCCESS) have_ipv4 = ISC_TRUE; result = isc_net_probeipv6(); if (result == ISC_R_SUCCESS) have_ipv6 = ISC_TRUE; if (!have_ipv4 && !have_ipv6) fatal("could not find either IPv4 or IPv6"); result = isc_mem_create(0, 0, &mctx); check_result(result, "isc_mem_create"); lwresult = lwres_context_create(&lwctx, mctx, mem_alloc, mem_free, 1); if (lwresult != LWRES_R_SUCCESS) fatal("lwres_context_create failed"); (void)lwres_conf_parse(lwctx, RESOLV_CONF); lwconf = lwres_conf_get(lwctx); ns_total = lwconf->nsnext; if (ns_total <= 0) { /* No name servers in resolv.conf; default to loopback. */ struct in_addr localhost; ns_total = 1; servers = isc_mem_get(mctx, ns_total * sizeof(isc_sockaddr_t)); if (servers == NULL) fatal("out of memory"); localhost.s_addr = htonl(INADDR_LOOPBACK); isc_sockaddr_fromin(&servers[0], &localhost, DNSDEFAULTPORT); } else { servers = isc_mem_get(mctx, ns_total * sizeof(isc_sockaddr_t)); if (servers == NULL) fatal("out of memory"); for (i = 0; i < ns_total; i++) { if (lwconf->nameservers[i].family == LWRES_ADDRTYPE_V4) { struct in_addr in4; memcpy(&in4, lwconf->nameservers[i].address, 4); isc_sockaddr_fromin(&servers[i], &in4, DNSDEFAULTPORT); } else { struct in6_addr in6; memcpy(&in6, lwconf->nameservers[i].address, 16); isc_sockaddr_fromin6(&servers[i], &in6, DNSDEFAULTPORT); } } } result = isc_entropy_create(mctx, &entp); check_result(result, "isc_entropy_create"); result = isc_hash_create(mctx, entp, DNS_NAME_MAXWIRE); check_result(result, "isc_hash_create"); isc_hash_init(); result = dns_dispatchmgr_create(mctx, entp, &dispatchmgr); check_result(result, "dns_dispatchmgr_create"); result = isc_socketmgr_create(mctx, &socketmgr); check_result(result, "dns_socketmgr_create"); result = isc_timermgr_create(mctx, &timermgr); check_result(result, "dns_timermgr_create"); result = isc_taskmgr_create(mctx, 1, 0, &taskmgr); check_result(result, "isc_taskmgr_create"); result = isc_task_create(taskmgr, 0, &global_task); check_result(result, "isc_task_create"); result = isc_task_onshutdown(global_task, shutdown_program, NULL); check_result(result, "isc_task_onshutdown"); result = dst_lib_init(mctx, entp, 0); check_result(result, "dst_lib_init"); is_dst_up = ISC_TRUE; attrmask = DNS_DISPATCHATTR_UDP | DNS_DISPATCHATTR_TCP; attrmask |= DNS_DISPATCHATTR_IPV4 | DNS_DISPATCHATTR_IPV6; if (have_ipv6) { attrs = DNS_DISPATCHATTR_UDP; attrs |= DNS_DISPATCHATTR_MAKEQUERY; attrs |= DNS_DISPATCHATTR_IPV6; isc_sockaddr_any6(&bind_any6); result = dns_dispatch_getudp(dispatchmgr, socketmgr, taskmgr, &bind_any6, PACKETSIZE, 4, 2, 3, 5, attrs, attrmask, &dispatchv6); check_result(result, "dns_dispatch_getudp (v6)"); } if (have_ipv4) { attrs = DNS_DISPATCHATTR_UDP; attrs |= DNS_DISPATCHATTR_MAKEQUERY; attrs |= DNS_DISPATCHATTR_IPV4; isc_sockaddr_any(&bind_any); result = dns_dispatch_getudp(dispatchmgr, socketmgr, taskmgr, &bind_any, PACKETSIZE, 4, 2, 3, 5, attrs, attrmask, &dispatchv4); check_result(result, "dns_dispatch_getudp (v4)"); } result = dns_requestmgr_create(mctx, timermgr, socketmgr, taskmgr, dispatchmgr, dispatchv4, dispatchv6, &requestmgr); check_result(result, "dns_requestmgr_create"); if (keystr != NULL) setup_keystr(); else if (keyfile != NULL) setup_keyfile(); } static void get_address(char *host, in_port_t port, isc_sockaddr_t *sockaddr) { int count; isc_result_t result; isc_app_block(); result = bind9_getaddresses(host, port, sockaddr, 1, &count); isc_app_unblock(); if (result != ISC_R_SUCCESS) fatal("couldn't get address for '%s': %s", host, isc_result_totext(result)); INSIST(count == 1); } static void parse_args(int argc, char **argv) { int ch; isc_result_t result; debug("parse_args"); while ((ch = isc_commandline_parse(argc, argv, "dDMy:vk:r:t:u:")) != -1) { switch (ch) { case 'd': debugging = ISC_TRUE; break; case 'D': /* was -dd */ debugging = ISC_TRUE; ddebugging = ISC_TRUE; break; case 'M': /* was -dm */ debugging = ISC_TRUE; ddebugging = ISC_TRUE; memdebugging = ISC_TRUE; isc_mem_debugging = ISC_MEM_DEBUGTRACE | ISC_MEM_DEBUGRECORD; break; case 'y': keystr = isc_commandline_argument; break; case 'v': usevc = ISC_TRUE; break; case 'k': keyfile = isc_commandline_argument; break; case 't': result = isc_parse_uint32(&timeout, isc_commandline_argument, 10); if (result != ISC_R_SUCCESS) { fprintf(stderr, "bad timeout '%s'\n", isc_commandline_argument); exit(1); } if (timeout == 0) timeout = UINT_MAX; break; case 'u': result = isc_parse_uint32(&udp_timeout, isc_commandline_argument, 10); if (result != ISC_R_SUCCESS) { fprintf(stderr, "bad udp timeout '%s'\n", isc_commandline_argument); exit(1); } if (udp_timeout == 0) udp_timeout = UINT_MAX; break; case 'r': result = isc_parse_uint32(&udp_retries, isc_commandline_argument, 10); if (result != ISC_R_SUCCESS) { fprintf(stderr, "bad udp retries '%s'\n", isc_commandline_argument); exit(1); } break; default: fprintf(stderr, "%s: invalid argument -%c\n", argv[0], ch); fprintf(stderr, "usage: nsupdate [-d] " "[-y keyname:secret | -k keyfile] [-v] " "[filename]\n"); exit(1); } } if (keyfile != NULL && keystr != NULL) { fprintf(stderr, "%s: cannot specify both -k and -y\n", argv[0]); exit(1); } if (argv[isc_commandline_index] != NULL) { if (strcmp(argv[isc_commandline_index], "-") == 0) { input = stdin; } else { result = isc_stdio_open(argv[isc_commandline_index], "r", &input); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not open '%s': %s\n", argv[isc_commandline_index], isc_result_totext(result)); exit(1); } } interactive = ISC_FALSE; } } static isc_uint16_t parse_name(char **cmdlinep, dns_message_t *msg, dns_name_t **namep) { isc_result_t result; char *word; isc_buffer_t *namebuf = NULL; isc_buffer_t source; word = nsu_strsep(cmdlinep, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read owner name\n"); return (STATUS_SYNTAX); } result = dns_message_gettempname(msg, namep); check_result(result, "dns_message_gettempname"); result = isc_buffer_allocate(mctx, &namebuf, DNS_NAME_MAXWIRE); check_result(result, "isc_buffer_allocate"); dns_name_init(*namep, NULL); dns_name_setbuffer(*namep, namebuf); dns_message_takebuffer(msg, &namebuf); isc_buffer_init(&source, word, strlen(word)); isc_buffer_add(&source, strlen(word)); result = dns_name_fromtext(*namep, &source, dns_rootname, ISC_FALSE, NULL); check_result(result, "dns_name_fromtext"); isc_buffer_invalidate(&source); return (STATUS_MORE); } static isc_uint16_t parse_rdata(char **cmdlinep, dns_rdataclass_t rdataclass, dns_rdatatype_t rdatatype, dns_message_t *msg, dns_rdata_t *rdata) { char *cmdline = *cmdlinep; isc_buffer_t source, *buf = NULL, *newbuf = NULL; isc_region_t r; isc_lex_t *lex = NULL; dns_rdatacallbacks_t callbacks; isc_result_t result; while (*cmdline != 0 && isspace((unsigned char)*cmdline)) cmdline++; if (*cmdline != 0) { dns_rdatacallbacks_init(&callbacks); result = isc_lex_create(mctx, strlen(cmdline), &lex); check_result(result, "isc_lex_create"); isc_buffer_init(&source, cmdline, strlen(cmdline)); isc_buffer_add(&source, strlen(cmdline)); result = isc_lex_openbuffer(lex, &source); check_result(result, "isc_lex_openbuffer"); result = isc_buffer_allocate(mctx, &buf, MAXWIRE); check_result(result, "isc_buffer_allocate"); result = dns_rdata_fromtext(rdata, rdataclass, rdatatype, lex, dns_rootname, 0, mctx, buf, &callbacks); isc_lex_destroy(&lex); if (result == ISC_R_SUCCESS) { isc_buffer_usedregion(buf, &r); result = isc_buffer_allocate(mctx, &newbuf, r.length); check_result(result, "isc_buffer_allocate"); isc_buffer_putmem(newbuf, r.base, r.length); isc_buffer_usedregion(newbuf, &r); dns_rdata_fromregion(rdata, rdataclass, rdatatype, &r); isc_buffer_free(&buf); dns_message_takebuffer(msg, &newbuf); } else { fprintf(stderr, "invalid rdata format: %s\n", isc_result_totext(result)); isc_buffer_free(&buf); return (STATUS_SYNTAX); } } else { rdata->flags = DNS_RDATA_UPDATE; } *cmdlinep = cmdline; return (STATUS_MORE); } static isc_uint16_t make_prereq(char *cmdline, isc_boolean_t ispositive, isc_boolean_t isrrset) { isc_result_t result; char *word; dns_name_t *name = NULL; isc_textregion_t region; dns_rdataset_t *rdataset = NULL; dns_rdatalist_t *rdatalist = NULL; dns_rdataclass_t rdataclass; dns_rdatatype_t rdatatype; dns_rdata_t *rdata = NULL; isc_uint16_t retval; ddebug("make_prereq()"); /* * Read the owner name */ retval = parse_name(&cmdline, updatemsg, &name); if (retval != STATUS_MORE) return (retval); /* * If this is an rrset prereq, read the class or type. */ if (isrrset) { word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read class or type\n"); goto failure; } region.base = word; region.length = strlen(word); result = dns_rdataclass_fromtext(&rdataclass, ®ion); if (result == ISC_R_SUCCESS) { if (!setzoneclass(rdataclass)) { fprintf(stderr, "class mismatch: %s\n", word); goto failure; } /* * Now read the type. */ word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read type\n"); goto failure; } region.base = word; region.length = strlen(word); result = dns_rdatatype_fromtext(&rdatatype, ®ion); if (result != ISC_R_SUCCESS) { fprintf(stderr, "invalid type: %s\n", word); goto failure; } } else { rdataclass = getzoneclass(); result = dns_rdatatype_fromtext(&rdatatype, ®ion); if (result != ISC_R_SUCCESS) { fprintf(stderr, "invalid type: %s\n", word); goto failure; } } } else rdatatype = dns_rdatatype_any; result = dns_message_gettemprdata(updatemsg, &rdata); check_result(result, "dns_message_gettemprdata"); rdata->data = NULL; rdata->length = 0; if (isrrset && ispositive) { retval = parse_rdata(&cmdline, rdataclass, rdatatype, updatemsg, rdata); if (retval != STATUS_MORE) goto failure; } else rdata->flags = DNS_RDATA_UPDATE; result = dns_message_gettemprdatalist(updatemsg, &rdatalist); check_result(result, "dns_message_gettemprdatalist"); result = dns_message_gettemprdataset(updatemsg, &rdataset); check_result(result, "dns_message_gettemprdataset"); dns_rdatalist_init(rdatalist); rdatalist->type = rdatatype; if (ispositive) { if (isrrset && rdata->data != NULL) rdatalist->rdclass = rdataclass; else rdatalist->rdclass = dns_rdataclass_any; } else rdatalist->rdclass = dns_rdataclass_none; rdatalist->covers = 0; rdatalist->ttl = 0; rdata->rdclass = rdatalist->rdclass; rdata->type = rdatatype; ISC_LIST_INIT(rdatalist->rdata); ISC_LIST_APPEND(rdatalist->rdata, rdata, link); dns_rdataset_init(rdataset); dns_rdatalist_tordataset(rdatalist, rdataset); ISC_LIST_INIT(name->list); ISC_LIST_APPEND(name->list, rdataset, link); dns_message_addname(updatemsg, name, DNS_SECTION_PREREQUISITE); return (STATUS_MORE); failure: if (name != NULL) dns_message_puttempname(updatemsg, &name); return (STATUS_SYNTAX); } static isc_uint16_t evaluate_prereq(char *cmdline) { char *word; isc_boolean_t ispositive, isrrset; ddebug("evaluate_prereq()"); word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read operation code\n"); return (STATUS_SYNTAX); } if (strcasecmp(word, "nxdomain") == 0) { ispositive = ISC_FALSE; isrrset = ISC_FALSE; } else if (strcasecmp(word, "yxdomain") == 0) { ispositive = ISC_TRUE; isrrset = ISC_FALSE; } else if (strcasecmp(word, "nxrrset") == 0) { ispositive = ISC_FALSE; isrrset = ISC_TRUE; } else if (strcasecmp(word, "yxrrset") == 0) { ispositive = ISC_TRUE; isrrset = ISC_TRUE; } else { fprintf(stderr, "incorrect operation code: %s\n", word); return (STATUS_SYNTAX); } return (make_prereq(cmdline, ispositive, isrrset)); } static isc_uint16_t evaluate_server(char *cmdline) { char *word, *server; long port; word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read server name\n"); return (STATUS_SYNTAX); } server = word; word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) port = DNSDEFAULTPORT; else { char *endp; port = strtol(word, &endp, 10); if (*endp != 0) { fprintf(stderr, "port '%s' is not numeric\n", word); return (STATUS_SYNTAX); } else if (port < 1 || port > 65535) { fprintf(stderr, "port '%s' is out of range " "(1 to 65535)\n", word); return (STATUS_SYNTAX); } } if (userserver == NULL) { userserver = isc_mem_get(mctx, sizeof(isc_sockaddr_t)); if (userserver == NULL) fatal("out of memory"); } get_address(server, (in_port_t)port, userserver); return (STATUS_MORE); } static isc_uint16_t evaluate_local(char *cmdline) { char *word, *local; long port; struct in_addr in4; struct in6_addr in6; word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read server name\n"); return (STATUS_SYNTAX); } local = word; word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) port = 0; else { char *endp; port = strtol(word, &endp, 10); if (*endp != 0) { fprintf(stderr, "port '%s' is not numeric\n", word); return (STATUS_SYNTAX); } else if (port < 1 || port > 65535) { fprintf(stderr, "port '%s' is out of range " "(1 to 65535)\n", word); return (STATUS_SYNTAX); } } if (localaddr == NULL) { localaddr = isc_mem_get(mctx, sizeof(isc_sockaddr_t)); if (localaddr == NULL) fatal("out of memory"); } if (have_ipv6 && inet_pton(AF_INET6, local, &in6) == 1) isc_sockaddr_fromin6(localaddr, &in6, (in_port_t)port); else if (have_ipv4 && inet_pton(AF_INET, local, &in4) == 1) isc_sockaddr_fromin(localaddr, &in4, (in_port_t)port); else { fprintf(stderr, "invalid address %s", local); return (STATUS_SYNTAX); } return (STATUS_MORE); } static isc_uint16_t evaluate_key(char *cmdline) { char *namestr; char *secretstr; isc_buffer_t b; isc_result_t result; dns_fixedname_t fkeyname; dns_name_t *keyname; int secretlen; unsigned char *secret = NULL; isc_buffer_t secretbuf; namestr = nsu_strsep(&cmdline, " \t\r\n"); if (*namestr == 0) { fprintf(stderr, "could not read key name\n"); return (STATUS_SYNTAX); } dns_fixedname_init(&fkeyname); keyname = dns_fixedname_name(&fkeyname); isc_buffer_init(&b, namestr, strlen(namestr)); isc_buffer_add(&b, strlen(namestr)); result = dns_name_fromtext(keyname, &b, dns_rootname, ISC_FALSE, NULL); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not parse key name\n"); return (STATUS_SYNTAX); } secretstr = nsu_strsep(&cmdline, "\r\n"); if (*secretstr == 0) { fprintf(stderr, "could not read key secret\n"); return (STATUS_SYNTAX); } secretlen = strlen(secretstr) * 3 / 4; secret = isc_mem_allocate(mctx, secretlen); if (secret == NULL) fatal("out of memory"); isc_buffer_init(&secretbuf, secret, secretlen); result = isc_base64_decodestring(secretstr, &secretbuf); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not create key from %s: %s\n", secretstr, isc_result_totext(result)); isc_mem_free(mctx, secret); return (STATUS_SYNTAX); } secretlen = isc_buffer_usedlength(&secretbuf); if (tsigkey != NULL) dns_tsigkey_detach(&tsigkey); result = dns_tsigkey_create(keyname, dns_tsig_hmacmd5_name, secret, secretlen, ISC_TRUE, NULL, 0, 0, mctx, NULL, &tsigkey); isc_mem_free(mctx, secret); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not create key from %s %s: %s\n", namestr, secretstr, dns_result_totext(result)); return (STATUS_SYNTAX); } return (STATUS_MORE); } static isc_uint16_t evaluate_zone(char *cmdline) { char *word; isc_buffer_t b; isc_result_t result; word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read zone name\n"); return (STATUS_SYNTAX); } dns_fixedname_init(&fuserzone); userzone = dns_fixedname_name(&fuserzone); isc_buffer_init(&b, word, strlen(word)); isc_buffer_add(&b, strlen(word)); result = dns_name_fromtext(userzone, &b, dns_rootname, ISC_FALSE, NULL); if (result != ISC_R_SUCCESS) { userzone = NULL; /* Lest it point to an invalid name */ fprintf(stderr, "could not parse zone name\n"); return (STATUS_SYNTAX); } return (STATUS_MORE); } static isc_uint16_t evaluate_class(char *cmdline) { char *word; isc_textregion_t r; isc_result_t result; dns_rdataclass_t rdclass; word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read class name\n"); return (STATUS_SYNTAX); } r.base = word; r.length = strlen(word); result = dns_rdataclass_fromtext(&rdclass, &r); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not parse class name: %s\n", word); return (STATUS_SYNTAX); } switch (rdclass) { case dns_rdataclass_none: case dns_rdataclass_any: case dns_rdataclass_reserved0: fprintf(stderr, "bad default class: %s\n", word); return (STATUS_SYNTAX); default: defaultclass = rdclass; } return (STATUS_MORE); } static isc_uint16_t update_addordelete(char *cmdline, isc_boolean_t isdelete) { isc_result_t result; dns_name_t *name = NULL; isc_uint32_t ttl; char *word; dns_rdataclass_t rdataclass; dns_rdatatype_t rdatatype; dns_rdata_t *rdata = NULL; dns_rdatalist_t *rdatalist = NULL; dns_rdataset_t *rdataset = NULL; isc_textregion_t region; isc_uint16_t retval; ddebug("update_addordelete()"); /* * Read the owner name. */ retval = parse_name(&cmdline, updatemsg, &name); if (retval != STATUS_MORE) return (retval); result = dns_message_gettemprdata(updatemsg, &rdata); check_result(result, "dns_message_gettemprdata"); rdata->rdclass = 0; rdata->type = 0; rdata->data = NULL; rdata->length = 0; /* * If this is an add, read the TTL and verify that it's in range. * If it's a delete, ignore a TTL if present (for compatibility). */ word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { if (!isdelete) { fprintf(stderr, "could not read owner ttl\n"); goto failure; } else { ttl = 0; rdataclass = dns_rdataclass_any; rdatatype = dns_rdatatype_any; rdata->flags = DNS_RDATA_UPDATE; goto doneparsing; } } result = isc_parse_uint32(&ttl, word, 10); if (result != ISC_R_SUCCESS) { if (isdelete) { ttl = 0; goto parseclass; } else { fprintf(stderr, "ttl '%s': %s\n", word, isc_result_totext(result)); goto failure; } } if (isdelete) ttl = 0; else if (ttl > TTL_MAX) { fprintf(stderr, "ttl '%s' is out of range (0 to %u)\n", word, TTL_MAX); goto failure; } /* * Read the class or type. */ word = nsu_strsep(&cmdline, " \t\r\n"); parseclass: if (*word == 0) { if (isdelete) { rdataclass = dns_rdataclass_any; rdatatype = dns_rdatatype_any; rdata->flags = DNS_RDATA_UPDATE; goto doneparsing; } else { fprintf(stderr, "could not read class or type\n"); goto failure; } } region.base = word; region.length = strlen(word); result = dns_rdataclass_fromtext(&rdataclass, ®ion); if (result == ISC_R_SUCCESS) { if (!setzoneclass(rdataclass)) { fprintf(stderr, "class mismatch: %s\n", word); goto failure; } /* * Now read the type. */ word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { if (isdelete) { rdataclass = dns_rdataclass_any; rdatatype = dns_rdatatype_any; rdata->flags = DNS_RDATA_UPDATE; goto doneparsing; } else { fprintf(stderr, "could not read type\n"); goto failure; } } region.base = word; region.length = strlen(word); result = dns_rdatatype_fromtext(&rdatatype, ®ion); if (result != ISC_R_SUCCESS) { fprintf(stderr, "'%s' is not a valid type: %s\n", word, isc_result_totext(result)); goto failure; } } else { rdataclass = getzoneclass(); result = dns_rdatatype_fromtext(&rdatatype, ®ion); if (result != ISC_R_SUCCESS) { fprintf(stderr, "'%s' is not a valid class or type: " "%s\n", word, isc_result_totext(result)); goto failure; } } retval = parse_rdata(&cmdline, rdataclass, rdatatype, updatemsg, rdata); if (retval != STATUS_MORE) goto failure; if (isdelete) { if ((rdata->flags & DNS_RDATA_UPDATE) != 0) rdataclass = dns_rdataclass_any; else rdataclass = dns_rdataclass_none; } else { if ((rdata->flags & DNS_RDATA_UPDATE) != 0) { fprintf(stderr, "could not read rdata\n"); goto failure; } } doneparsing: result = dns_message_gettemprdatalist(updatemsg, &rdatalist); check_result(result, "dns_message_gettemprdatalist"); result = dns_message_gettemprdataset(updatemsg, &rdataset); check_result(result, "dns_message_gettemprdataset"); dns_rdatalist_init(rdatalist); rdatalist->type = rdatatype; rdatalist->rdclass = rdataclass; rdatalist->covers = rdatatype; rdatalist->ttl = (dns_ttl_t)ttl; ISC_LIST_INIT(rdatalist->rdata); ISC_LIST_APPEND(rdatalist->rdata, rdata, link); dns_rdataset_init(rdataset); dns_rdatalist_tordataset(rdatalist, rdataset); ISC_LIST_INIT(name->list); ISC_LIST_APPEND(name->list, rdataset, link); dns_message_addname(updatemsg, name, DNS_SECTION_UPDATE); return (STATUS_MORE); failure: if (name != NULL) dns_message_puttempname(updatemsg, &name); if (rdata != NULL) dns_message_puttemprdata(updatemsg, &rdata); return (STATUS_SYNTAX); } static isc_uint16_t evaluate_update(char *cmdline) { char *word; isc_boolean_t isdelete; ddebug("evaluate_update()"); word = nsu_strsep(&cmdline, " \t\r\n"); if (*word == 0) { fprintf(stderr, "could not read operation code\n"); return (STATUS_SYNTAX); } if (strcasecmp(word, "delete") == 0) isdelete = ISC_TRUE; else if (strcasecmp(word, "add") == 0) isdelete = ISC_FALSE; else { fprintf(stderr, "incorrect operation code: %s\n", word); return (STATUS_SYNTAX); } return (update_addordelete(cmdline, isdelete)); } static void show_message(dns_message_t *msg) { isc_result_t result; isc_buffer_t *buf = NULL; int bufsz; ddebug("show_message()"); bufsz = INITTEXT; do { if (bufsz > MAXTEXT) { fprintf(stderr, "could not allocate large enough " "buffer to display message\n"); exit(1); } if (buf != NULL) isc_buffer_free(&buf); result = isc_buffer_allocate(mctx, &buf, bufsz); check_result(result, "isc_buffer_allocate"); result = dns_message_totext(msg, style, 0, buf); bufsz *= 2; } while (result == ISC_R_NOSPACE); if (result != ISC_R_SUCCESS) { fprintf(stderr, "could not convert message to text format.\n"); isc_buffer_free(&buf); return; } printf("Outgoing update query:\n%.*s", (int)isc_buffer_usedlength(buf), (char*)isc_buffer_base(buf)); isc_buffer_free(&buf); } static isc_uint16_t get_next_command(void) { char cmdlinebuf[MAXCMD]; char *cmdline; char *word; ddebug("get_next_command()"); if (interactive) fprintf(stdout, "> "); isc_app_block(); cmdline = fgets(cmdlinebuf, MAXCMD, input); isc_app_unblock(); if (cmdline == NULL) return (STATUS_QUIT); word = nsu_strsep(&cmdline, " \t\r\n"); if (feof(input)) return (STATUS_QUIT); if (*word == 0) return (STATUS_SEND); if (word[0] == ';') return (STATUS_MORE); if (strcasecmp(word, "quit") == 0) return (STATUS_QUIT); if (strcasecmp(word, "prereq") == 0) return (evaluate_prereq(cmdline)); if (strcasecmp(word, "update") == 0) return (evaluate_update(cmdline)); if (strcasecmp(word, "server") == 0) return (evaluate_server(cmdline)); if (strcasecmp(word, "local") == 0) return (evaluate_local(cmdline)); if (strcasecmp(word, "zone") == 0) return (evaluate_zone(cmdline)); if (strcasecmp(word, "class") == 0) return (evaluate_class(cmdline)); if (strcasecmp(word, "send") == 0) return (STATUS_SEND); if (strcasecmp(word, "show") == 0) { show_message(updatemsg); return (STATUS_MORE); } if (strcasecmp(word, "answer") == 0) { if (answer != NULL) show_message(answer); return (STATUS_MORE); } if (strcasecmp(word, "key") == 0) return (evaluate_key(cmdline)); fprintf(stderr, "incorrect section name: %s\n", word); return (STATUS_SYNTAX); } static isc_boolean_t user_interaction(void) { isc_uint16_t result = STATUS_MORE; ddebug("user_interaction()"); while ((result == STATUS_MORE) || (result == STATUS_SYNTAX)) result = get_next_command(); if (result == STATUS_SEND) return (ISC_TRUE); return (ISC_FALSE); } static void done_update(void) { isc_event_t *event = global_event; ddebug("done_update()"); isc_task_send(global_task, &event); } static void check_tsig_error(dns_rdataset_t *rdataset, isc_buffer_t *b) { isc_result_t result; dns_rdata_t rdata = DNS_RDATA_INIT; dns_rdata_any_tsig_t tsig; result = dns_rdataset_first(rdataset); check_result(result, "dns_rdataset_first"); dns_rdataset_current(rdataset, &rdata); result = dns_rdata_tostruct(&rdata, &tsig, NULL); check_result(result, "dns_rdata_tostruct"); if (tsig.error != 0) { if (isc_buffer_remaininglength(b) < 1) check_result(ISC_R_NOSPACE, "isc_buffer_remaininglength"); isc__buffer_putstr(b, "(" /*)*/); result = dns_tsigrcode_totext(tsig.error, b); check_result(result, "dns_tsigrcode_totext"); if (isc_buffer_remaininglength(b) < 1) check_result(ISC_R_NOSPACE, "isc_buffer_remaininglength"); isc__buffer_putstr(b, /*(*/ ")"); } } static void update_completed(isc_task_t *task, isc_event_t *event) { dns_requestevent_t *reqev = NULL; isc_result_t result; dns_request_t *request; UNUSED(task); ddebug("update_completed()"); requests--; REQUIRE(event->ev_type == DNS_EVENT_REQUESTDONE); reqev = (dns_requestevent_t *)event; request = reqev->request; if (shuttingdown) { dns_request_destroy(&request); isc_event_free(&event); maybeshutdown(); return; } if (reqev->result != ISC_R_SUCCESS) { fprintf(stderr, "; Communication with server failed: %s\n", isc_result_totext(reqev->result)); seenerror = ISC_TRUE; goto done; } result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &answer); check_result(result, "dns_message_create"); result = dns_request_getresponse(request, answer, DNS_MESSAGEPARSE_PRESERVEORDER); switch (result) { case ISC_R_SUCCESS: break; case DNS_R_CLOCKSKEW: case DNS_R_EXPECTEDTSIG: case DNS_R_TSIGERRORSET: case DNS_R_TSIGVERIFYFAILURE: case DNS_R_UNEXPECTEDTSIG: fprintf(stderr, "; TSIG error with server: %s\n", isc_result_totext(result)); seenerror = ISC_TRUE; break; default: check_result(result, "dns_request_getresponse"); } if (answer->rcode != dns_rcode_noerror) { seenerror = ISC_TRUE; if (!debugging) { char buf[64]; isc_buffer_t b; dns_rdataset_t *rds; isc_buffer_init(&b, buf, sizeof(buf) - 1); result = dns_rcode_totext(answer->rcode, &b); check_result(result, "dns_rcode_totext"); rds = dns_message_gettsig(answer, NULL); if (rds != NULL) check_tsig_error(rds, &b); fprintf(stderr, "update failed: %.*s\n", (int)isc_buffer_usedlength(&b), buf); } } if (debugging) { isc_buffer_t *buf = NULL; int bufsz; bufsz = INITTEXT; do { if (bufsz > MAXTEXT) { fprintf(stderr, "could not allocate large " "enough buffer to display message\n"); exit(1); } if (buf != NULL) isc_buffer_free(&buf); result = isc_buffer_allocate(mctx, &buf, bufsz); check_result(result, "isc_buffer_allocate"); result = dns_message_totext(answer, style, 0, buf); bufsz *= 2; } while (result == ISC_R_NOSPACE); check_result(result, "dns_message_totext"); fprintf(stderr, "\nReply from update query:\n%.*s\n", (int)isc_buffer_usedlength(buf), (char*)isc_buffer_base(buf)); isc_buffer_free(&buf); } done: dns_request_destroy(&request); isc_event_free(&event); done_update(); } static void send_update(dns_name_t *zonename, isc_sockaddr_t *master, isc_sockaddr_t *srcaddr) { isc_result_t result; dns_request_t *request = NULL; dns_name_t *name = NULL; dns_rdataset_t *rdataset = NULL; unsigned int options = 0; ddebug("send_update()"); result = dns_message_gettempname(updatemsg, &name); check_result(result, "dns_message_gettempname"); dns_name_init(name, NULL); dns_name_clone(zonename, name); result = dns_message_gettemprdataset(updatemsg, &rdataset); check_result(result, "dns_message_gettemprdataset"); dns_rdataset_makequestion(rdataset, getzoneclass(), dns_rdatatype_soa); ISC_LIST_INIT(name->list); ISC_LIST_APPEND(name->list, rdataset, link); dns_message_addname(updatemsg, name, DNS_SECTION_ZONE); if (usevc) options |= DNS_REQUESTOPT_TCP; if (tsigkey == NULL && sig0key != NULL) { result = dns_message_setsig0key(updatemsg, sig0key); check_result(result, "dns_message_setsig0key"); } if (debugging) { char addrbuf[ISC_SOCKADDR_FORMATSIZE]; isc_sockaddr_format(master, addrbuf, sizeof(addrbuf)); fprintf(stderr, "Sending update to %s\n", addrbuf); } result = dns_request_createvia3(requestmgr, updatemsg, srcaddr, master, options, tsigkey, timeout, udp_timeout, udp_retries, global_task, update_completed, NULL, &request); check_result(result, "dns_request_createvia3"); if (debugging) show_message(updatemsg); requests++; } static void recvsoa(isc_task_t *task, isc_event_t *event) { dns_requestevent_t *reqev = NULL; dns_request_t *request = NULL; isc_result_t result, eresult; dns_message_t *rcvmsg = NULL; dns_section_t section; dns_name_t *name = NULL; dns_rdataset_t *soaset = NULL; dns_rdata_soa_t soa; dns_rdata_t soarr = DNS_RDATA_INIT; int pass = 0; dns_name_t master; isc_sockaddr_t *serveraddr, tempaddr; dns_name_t *zonename; nsu_requestinfo_t *reqinfo; dns_message_t *soaquery = NULL; isc_sockaddr_t *addr; isc_boolean_t seencname = ISC_FALSE; dns_name_t tname; unsigned int nlabels; UNUSED(task); ddebug("recvsoa()"); requests--; REQUIRE(event->ev_type == DNS_EVENT_REQUESTDONE); reqev = (dns_requestevent_t *)event; request = reqev->request; eresult = reqev->result; reqinfo = reqev->ev_arg; soaquery = reqinfo->msg; addr = reqinfo->addr; if (shuttingdown) { dns_request_destroy(&request); dns_message_destroy(&soaquery); isc_mem_put(mctx, reqinfo, sizeof(nsu_requestinfo_t)); isc_event_free(&event); maybeshutdown(); return; } if (eresult != ISC_R_SUCCESS) { char addrbuf[ISC_SOCKADDR_FORMATSIZE]; isc_sockaddr_format(addr, addrbuf, sizeof(addrbuf)); fprintf(stderr, "; Communication with %s failed: %s\n", addrbuf, isc_result_totext(eresult)); if (userserver != NULL) fatal("could not talk to specified name server"); else if (++ns_inuse >= lwconf->nsnext) fatal("could not talk to any default name server"); ddebug("Destroying request [%p]", request); dns_request_destroy(&request); dns_message_renderreset(soaquery); dns_message_settsigkey(soaquery, NULL); sendrequest(localaddr, &servers[ns_inuse], soaquery, &request); isc_mem_put(mctx, reqinfo, sizeof(nsu_requestinfo_t)); isc_event_free(&event); setzoneclass(dns_rdataclass_none); return; } isc_mem_put(mctx, reqinfo, sizeof(nsu_requestinfo_t)); isc_event_free(&event); reqev = NULL; ddebug("About to create rcvmsg"); result = dns_message_create(mctx, DNS_MESSAGE_INTENTPARSE, &rcvmsg); check_result(result, "dns_message_create"); result = dns_request_getresponse(request, rcvmsg, DNS_MESSAGEPARSE_PRESERVEORDER); if (result == DNS_R_TSIGERRORSET && userserver != NULL) { dns_message_destroy(&rcvmsg); ddebug("Destroying request [%p]", request); dns_request_destroy(&request); reqinfo = isc_mem_get(mctx, sizeof(nsu_requestinfo_t)); if (reqinfo == NULL) fatal("out of memory"); reqinfo->msg = soaquery; reqinfo->addr = addr; dns_message_renderreset(soaquery); ddebug("retrying soa request without TSIG"); result = dns_request_createvia3(requestmgr, soaquery, localaddr, addr, 0, NULL, FIND_TIMEOUT * 20, FIND_TIMEOUT * 20, 3, global_task, recvsoa, reqinfo, &request); check_result(result, "dns_request_createvia"); requests++; return; } check_result(result, "dns_request_getresponse"); section = DNS_SECTION_ANSWER; if (debugging) { isc_buffer_t *buf = NULL; int bufsz; bufsz = INITTEXT; do { if (buf != NULL) isc_buffer_free(&buf); if (bufsz > MAXTEXT) { fprintf(stderr, "could not allocate enough " "space for debugging message\n"); exit(1); } result = isc_buffer_allocate(mctx, &buf, bufsz); check_result(result, "isc_buffer_allocate"); result = dns_message_totext(rcvmsg, style, 0, buf); } while (result == ISC_R_NOSPACE); check_result(result, "dns_message_totext"); fprintf(stderr, "Reply from SOA query:\n%.*s\n", (int)isc_buffer_usedlength(buf), (char*)isc_buffer_base(buf)); isc_buffer_free(&buf); } if (rcvmsg->rcode != dns_rcode_noerror && rcvmsg->rcode != dns_rcode_nxdomain) fatal("response to SOA query was unsuccessful"); lookforsoa: if (pass == 0) section = DNS_SECTION_ANSWER; else if (pass == 1) section = DNS_SECTION_AUTHORITY; else goto droplabel; result = dns_message_firstname(rcvmsg, section); if (result != ISC_R_SUCCESS) { pass++; goto lookforsoa; } while (result == ISC_R_SUCCESS) { name = NULL; dns_message_currentname(rcvmsg, section, &name); soaset = NULL; result = dns_message_findtype(name, dns_rdatatype_soa, 0, &soaset); if (result == ISC_R_SUCCESS) break; if (section == DNS_SECTION_ANSWER) { dns_rdataset_t *tset = NULL; if (dns_message_findtype(name, dns_rdatatype_cname, 0, &tset) == ISC_R_SUCCESS || dns_message_findtype(name, dns_rdatatype_dname, 0, &tset) == ISC_R_SUCCESS ) { seencname = ISC_TRUE; break; } } result = dns_message_nextname(rcvmsg, section); } if (soaset == NULL && !seencname) { pass++; goto lookforsoa; } if (seencname) goto droplabel; if (debugging) { char namestr[DNS_NAME_FORMATSIZE]; dns_name_format(name, namestr, sizeof(namestr)); fprintf(stderr, "Found zone name: %s\n", namestr); } result = dns_rdataset_first(soaset); check_result(result, "dns_rdataset_first"); dns_rdata_init(&soarr); dns_rdataset_current(soaset, &soarr); result = dns_rdata_tostruct(&soarr, &soa, NULL); check_result(result, "dns_rdata_tostruct"); dns_name_init(&master, NULL); dns_name_clone(&soa.origin, &master); if (userzone != NULL) zonename = userzone; else zonename = name; if (debugging) { char namestr[DNS_NAME_FORMATSIZE]; dns_name_format(&master, namestr, sizeof(namestr)); fprintf(stderr, "The master is: %s\n", namestr); } if (userserver != NULL) serveraddr = userserver; else { char serverstr[DNS_NAME_MAXTEXT+1]; isc_buffer_t buf; isc_buffer_init(&buf, serverstr, sizeof(serverstr)); result = dns_name_totext(&master, ISC_TRUE, &buf); check_result(result, "dns_name_totext"); serverstr[isc_buffer_usedlength(&buf)] = 0; get_address(serverstr, DNSDEFAULTPORT, &tempaddr); serveraddr = &tempaddr; } dns_rdata_freestruct(&soa); send_update(zonename, serveraddr, localaddr); setzoneclass(dns_rdataclass_none); dns_message_destroy(&soaquery); dns_request_destroy(&request); out: dns_message_destroy(&rcvmsg); ddebug("Out of recvsoa"); return; droplabel: result = dns_message_firstname(soaquery, DNS_SECTION_QUESTION); INSIST(result == ISC_R_SUCCESS); name = NULL; dns_message_currentname(soaquery, DNS_SECTION_QUESTION, &name); nlabels = dns_name_countlabels(name); if (nlabels == 1) fatal("could not find enclosing zone"); dns_name_init(&tname, NULL); dns_name_getlabelsequence(name, 1, nlabels - 1, &tname); dns_name_clone(&tname, name); dns_request_destroy(&request); dns_message_renderreset(soaquery); dns_message_settsigkey(soaquery, NULL); if (userserver != NULL) sendrequest(localaddr, userserver, soaquery, &request); else sendrequest(localaddr, &servers[ns_inuse], soaquery, &request); goto out; } static void sendrequest(isc_sockaddr_t *srcaddr, isc_sockaddr_t *destaddr, dns_message_t *msg, dns_request_t **request) { isc_result_t result; nsu_requestinfo_t *reqinfo; reqinfo = isc_mem_get(mctx, sizeof(nsu_requestinfo_t)); if (reqinfo == NULL) fatal("out of memory"); reqinfo->msg = msg; reqinfo->addr = destaddr; result = dns_request_createvia3(requestmgr, msg, srcaddr, destaddr, 0, (userserver != NULL) ? tsigkey : NULL, FIND_TIMEOUT * 20, FIND_TIMEOUT, 3, global_task, recvsoa, reqinfo, request); check_result(result, "dns_request_createvia"); requests++; } static void start_update(void) { isc_result_t result; dns_rdataset_t *rdataset = NULL; dns_name_t *name = NULL; dns_request_t *request = NULL; dns_message_t *soaquery = NULL; dns_name_t *firstname; dns_section_t section = DNS_SECTION_UPDATE; ddebug("start_update()"); if (answer != NULL) dns_message_destroy(&answer); result = dns_message_firstname(updatemsg, section); if (result == ISC_R_NOMORE) { section = DNS_SECTION_PREREQUISITE; result = dns_message_firstname(updatemsg, section); } if (result != ISC_R_SUCCESS) { done_update(); return; } if (userzone != NULL && userserver != NULL) { send_update(userzone, userserver, localaddr); setzoneclass(dns_rdataclass_none); return; } result = dns_message_create(mctx, DNS_MESSAGE_INTENTRENDER, &soaquery); check_result(result, "dns_message_create"); soaquery->flags |= DNS_MESSAGEFLAG_RD; result = dns_message_gettempname(soaquery, &name); check_result(result, "dns_message_gettempname"); result = dns_message_gettemprdataset(soaquery, &rdataset); check_result(result, "dns_message_gettemprdataset"); dns_rdataset_makequestion(rdataset, getzoneclass(), dns_rdatatype_soa); firstname = NULL; dns_message_currentname(updatemsg, section, &firstname); dns_name_init(name, NULL); dns_name_clone(firstname, name); ISC_LIST_INIT(name->list); ISC_LIST_APPEND(name->list, rdataset, link); dns_message_addname(soaquery, name, DNS_SECTION_QUESTION); if (userserver != NULL) sendrequest(localaddr, userserver, soaquery, &request); else { ns_inuse = 0; sendrequest(localaddr, &servers[ns_inuse], soaquery, &request); } } static void cleanup(void) { ddebug("cleanup()"); if (answer != NULL) dns_message_destroy(&answer); ddebug("Shutting down task manager"); isc_taskmgr_destroy(&taskmgr); ddebug("Destroying event"); isc_event_free(&global_event); ddebug("Shutting down socket manager"); isc_socketmgr_destroy(&socketmgr); ddebug("Shutting down timer manager"); isc_timermgr_destroy(&timermgr); ddebug("Destroying hash context"); isc_hash_destroy(); ddebug("Destroying memory context"); if (memdebugging) isc_mem_stats(mctx, stderr); isc_mem_destroy(&mctx); } static void getinput(isc_task_t *task, isc_event_t *event) { isc_boolean_t more; UNUSED(task); if (shuttingdown) { maybeshutdown(); return; } if (global_event == NULL) global_event = event; reset_system(); more = user_interaction(); if (!more) { isc_app_shutdown(); return; } start_update(); return; } int main(int argc, char **argv) { isc_result_t result; style = &dns_master_style_debug; input = stdin; interactive = ISC_TF(isatty(0)); isc_app_start(); parse_args(argc, argv); setup_system(); result = isc_app_onrun(mctx, global_task, getinput, NULL); check_result(result, "isc_app_onrun"); (void)isc_app_run(); cleanup(); isc_app_finish(); if (seenerror) return (2); else return (0); }