#include <config.h>

#include <ctype.h>

#include <errno.h>

#include <limits.h>

#include <stdlib.h>

#include <unistd.h>

#include <isc/app.h>

#include <isc/base64.h>

#include <isc/buffer.h>

#include <isc/commandline.h>

#include <isc/entropy.h>

#include <isc/event.h>

#include <isc/hash.h>

#include <isc/lex.h>

#include <isc/log.h>

#include <isc/mem.h>

#include <isc/parseint.h>

#include <isc/random.h>

#include <isc/region.h>

#include <isc/sockaddr.h>

#include <isc/socket.h>

#include <isc/stdio.h>

#include <isc/string.h>

#include <isc/task.h>

#include <isc/timer.h>

#include <isc/types.h>

#include <isc/util.h>

#include <dns/callbacks.h>

#include <dns/dispatch.h>

#include <dns/dnssec.h>

#include <dns/events.h>

#include <dns/fixedname.h>

#include <dns/log.h>

#include <dns/masterdump.h>

#include <dns/message.h>

#include <dns/name.h>

#include <dns/rcode.h>

#include <dns/rdata.h>

#include <dns/rdataclass.h>

#include <dns/rdatalist.h>

#include <dns/rdataset.h>

#include <dns/rdatastruct.h>

#include <dns/rdatatype.h>

#include <dns/request.h>

#include <dns/result.h>

#include <dns/tkey.h>

#include <dns/tsig.h>

#include <dst/dst.h>

#include <lwres/lwres.h>

#include <lwres/net.h>

#ifdef GSSAPI

#include <dst/gssapi.h>

#endif

#include <bind9/getaddresses.h>

#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_boolean_t usegsstsig = ISC_FALSE;

static isc_boolean_t use_win2k_gsstsig = ISC_FALSE;

static isc_boolean_t tried_other_gsstsig = ISC_FALSE;

static isc_taskmgr_t *taskmgr = NULL;

static isc_task_t *global_task = NULL;

static isc_event_t *global_event = NULL;

static isc_log_t *lctx = 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_name_t *zonename = NULL;

static dns_name_t tmpzonename;

static dns_name_t restart_master;

static dns_tsig_keyring_t *gssring = 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 isc_sockaddr_t *serveraddr = NULL;

static isc_sockaddr_t tempaddr;

static char *keystr = NULL, *keyfile = NULL;

static isc_entropy_t *entropy = 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 logdebuglevel = 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;

static isc_uint32_t default_ttl = 0;

static isc_boolean_t default_ttl_set = ISC_FALSE;

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);

#ifdef GSSAPI

static dns_fixedname_t fkname;

static isc_sockaddr_t *kserver = NULL;

static char servicename[DNS_NAME_FORMATSIZE];

static dns_name_t *keyname;

typedef struct nsu_gssinfo {

dns_message_t *msg;

isc_sockaddr_t *addr;

gss_ctx_id_t context;

} nsu_gssinfo_t;

static void

start_gssrequest(dns_name_t *master);

static void

send_gssrequest(isc_sockaddr_t *srcaddr, isc_sockaddr_t *destaddr,

dns_message_t *msg, dns_request_t **request,

gss_ctx_id_t context);

static void

recvgss(isc_task_t *task, isc_event_t *event);

#endif /* GSSAPI */

static void

error(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

typedef struct entropysource entropysource_t;

struct entropysource {

isc_entropysource_t *source;

isc_mem_t *mctx;

ISC_LINK(entropysource_t) link;

};

static ISC_LIST(entropysource_t) sources;

static void

setup_entropy(isc_mem_t *mctx, const char *randomfile, isc_entropy_t **ectx)

{

isc_result_t result;

isc_entropysource_t *source = NULL;

entropysource_t *elt;

int usekeyboard = ISC_ENTROPY_KEYBOARDMAYBE;

REQUIRE(ectx != NULL);

if (*ectx == NULL) {

result = isc_entropy_create(mctx, ectx);

if (result != ISC_R_SUCCESS)

fatal("could not create entropy object");

ISC_LIST_INIT(sources);

}

if (randomfile != NULL && strcmp(randomfile, "keyboard") == 0) {

usekeyboard = ISC_ENTROPY_KEYBOARDYES;

randomfile = NULL;

}

result = isc_entropy_usebestsource(*ectx, &source, randomfile,

usekeyboard);

if (result != ISC_R_SUCCESS)

fatal("could not initialize entropy source: %s",

isc_result_totext(result));

if (source != NULL) {

elt = isc_mem_get(mctx, sizeof(*elt));

if (elt == NULL)

fatal("out of memory");

elt->source = source;

elt->mctx = mctx;

ISC_LINK_INIT(elt, link);

ISC_LIST_APPEND(sources, elt, link);

}

}

static void

cleanup_entropy(isc_entropy_t **ectx) {

entropysource_t *source;

while (!ISC_LIST_EMPTY(sources)) {

source = ISC_LIST_HEAD(sources);

ISC_LIST_UNLINK(sources, source, link);

isc_entropy_destroysource(&source->source);

isc_mem_put(source->mctx, source, sizeof(*source));

}

isc_entropy_detach(ectx);

}

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

error(const char *format, ...) {

va_list args;

va_start(args, format);

vfprintf(stderr, format, args);

va_end(args);

fprintf(stderr, "\n");

}

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;

if (usegsstsig) {

if (tsigkey != NULL)

dns_tsigkey_detach(&tsigkey);

if (gssring != NULL)

dns_tsigkeyring_destroy(&gssring);

tried_other_gsstsig = ISC_FALSE;

}

}

static isc_uint16_t

parse_hmac(dns_name_t **hmac, const char *hmacstr, size_t len) {

isc_uint16_t digestbits = 0;

isc_result_t result;

char buf[20];

REQUIRE(hmac != NULL && *hmac == NULL);

REQUIRE(hmacstr != NULL);

if (len >= sizeof(buf))

fatal("unknown key type '%.*s'", (int)(len), hmacstr);

strncpy(buf, hmacstr, len);

buf[len] = 0;

if (strcasecmp(buf, "hmac-md5") == 0) {

*hmac = DNS_TSIG_HMACMD5_NAME;

} else if (strncasecmp(buf, "hmac-md5-", 9) == 0) {

*hmac = DNS_TSIG_HMACMD5_NAME;

result = isc_parse_uint16(&digestbits, &buf[9], 10);

if (result != ISC_R_SUCCESS || digestbits > 128)

fatal("digest-bits out of range [0..128]");

digestbits = (digestbits +7) & ~0x7U;

} else if (strcasecmp(buf, "hmac-sha1") == 0) {

*hmac = DNS_TSIG_HMACSHA1_NAME;

} else if (strncasecmp(buf, "hmac-sha1-", 10) == 0) {

*hmac = DNS_TSIG_HMACSHA1_NAME;

result = isc_parse_uint16(&digestbits, &buf[10], 10);

if (result != ISC_R_SUCCESS || digestbits > 160)

fatal("digest-bits out of range [0..160]");

digestbits = (digestbits +7) & ~0x7U;

} else if (strcasecmp(buf, "hmac-sha224") == 0) {

*hmac = DNS_TSIG_HMACSHA224_NAME;

} else if (strncasecmp(buf, "hmac-sha224-", 12) == 0) {

*hmac = DNS_TSIG_HMACSHA224_NAME;

result = isc_parse_uint16(&digestbits, &buf[12], 10);

if (result != ISC_R_SUCCESS || digestbits > 224)

fatal("digest-bits out of range [0..224]");

digestbits = (digestbits +7) & ~0x7U;

} else if (strcasecmp(buf, "hmac-sha256") == 0) {

*hmac = DNS_TSIG_HMACSHA256_NAME;

} else if (strncasecmp(buf, "hmac-sha256-", 12) == 0) {

*hmac = DNS_TSIG_HMACSHA256_NAME;

result = isc_parse_uint16(&digestbits, &buf[12], 10);

if (result != ISC_R_SUCCESS || digestbits > 256)

fatal("digest-bits out of range [0..256]");

digestbits = (digestbits +7) & ~0x7U;

} else if (strcasecmp(buf, "hmac-sha384") == 0) {

*hmac = DNS_TSIG_HMACSHA384_NAME;

} else if (strncasecmp(buf, "hmac-sha384-", 12) == 0) {

*hmac = DNS_TSIG_HMACSHA384_NAME;

result = isc_parse_uint16(&digestbits, &buf[12], 10);

if (result != ISC_R_SUCCESS || digestbits > 384)

fatal("digest-bits out of range [0..384]");

digestbits = (digestbits +7) & ~0x7U;

} else if (strcasecmp(buf, "hmac-sha512") == 0) {

*hmac = DNS_TSIG_HMACSHA512_NAME;

} else if (strncasecmp(buf, "hmac-sha512-", 12) == 0) {

*hmac = DNS_TSIG_HMACSHA512_NAME;

result = isc_parse_uint16(&digestbits, &buf[12], 10);

if (result != ISC_R_SUCCESS || digestbits > 512)

fatal("digest-bits out of range [0..512]");

digestbits = (digestbits +7) & ~0x7U;

} else

fatal("unknown key type '%s'", buf);

return (digestbits);

}

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, *n;

dns_fixedname_t fkeyname;

dns_name_t *keyname;

char *name;

dns_name_t *hmacname = NULL;

isc_uint16_t digestbits = 0;

dns_fixedname_init(&fkeyname);

keyname = dns_fixedname_name(&fkeyname);

debug("Creating key...");

s = strchr(keystr, ':');

if (s == NULL || s == keystr || s[1] == 0)

fatal("key option must specify [hmac:]keyname:secret");

secretstr = s + 1;

n = strchr(secretstr, ':');

if (n != NULL) {

if (n == secretstr || n[1] == 0)

fatal("key option must specify [hmac:]keyname:secret");

name = secretstr;

secretstr = n + 1;

digestbits = parse_hmac(&hmacname, keystr, s - keystr);

} else {

hmacname = DNS_TSIG_HMACMD5_NAME;

name = keystr;

n = s;

}

isc_buffer_init(&keynamesrc, name, n - name);

isc_buffer_add(&keynamesrc, n - name);

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, hmacname, 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));

else

dst_key_setbits(tsigkey->key, digestbits);

failure:

if (secret != NULL)

isc_mem_free(mctx, secret);

}

static void

setup_keyfile(void) {

dst_key_t *dstkey = NULL;

isc_result_t result;

dns_name_t *hmacname = NULL;

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;

}

switch (dst_key_alg(dstkey)) {

case DST_ALG_HMACMD5:

hmacname = DNS_TSIG_HMACMD5_NAME;

break;

case DST_ALG_HMACSHA1:

hmacname = DNS_TSIG_HMACSHA1_NAME;

break;

case DST_ALG_HMACSHA224:

hmacname = DNS_TSIG_HMACSHA224_NAME;

break;

case DST_ALG_HMACSHA256:

hmacname = DNS_TSIG_HMACSHA256_NAME;

break;

case DST_ALG_HMACSHA384:

hmacname = DNS_TSIG_HMACSHA384_NAME;

break;

case DST_ALG_HMACSHA512:

hmacname = DNS_TSIG_HMACSHA512_NAME;

break;

}

if (hmacname != NULL) {

result = dns_tsigkey_createfromkey(dst_key_name(dstkey),

hmacname, 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;

}

cleanup_entropy(&entropy);

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;

isc_logconfig_t *logconfig = NULL;

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_log_create(mctx, &lctx, &logconfig);

check_result(result, "isc_log_create");

isc_log_setcontext(lctx);

dns_log_init(lctx);

dns_log_setcontext(lctx);

result = isc_log_usechannel(logconfig, "default_debug", NULL, NULL);

check_result(result, "isc_log_usechannel");

isc_log_setdebuglevel(lctx, logdebuglevel);

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);

}

}

}

setup_entropy(mctx, NULL, &entropy);

result = isc_hash_create(mctx, entropy, DNS_NAME_MAXWIRE);

check_result(result, "isc_hash_create");

isc_hash_init();

result = dns_dispatchmgr_create(mctx, entropy, &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, entropy, 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);

}

#define PARSE_ARGS_FMT "dDMl:y:govk:rR::t:u:"

static void

pre_parse_args(int argc, char **argv) {

int ch;

while ((ch = isc_commandline_parse(argc, argv, PARSE_ARGS_FMT)) != -1) {

switch (ch) {

case 'M': /* was -dm */

debugging = ISC_TRUE;

ddebugging = ISC_TRUE;

memdebugging = ISC_TRUE;

isc_mem_debugging = ISC_MEM_DEBUGTRACE |

ISC_MEM_DEBUGRECORD;

break;

case '?':

if (isc_commandline_option != '?')

fprintf(stderr, "%s: invalid argument -%c\n",

argv[0], isc_commandline_option);

fprintf(stderr, "usage: nsupdate [-d] "

"[-g | -o | -y keyname:secret | -k keyfile] "

"[-v] [filename]\n");

exit(1);

default:

break;

}

}

isc_commandline_reset = ISC_TRUE;

isc_commandline_index = 1;

}

static void

parse_args(int argc, char **argv, isc_mem_t *mctx, isc_entropy_t **ectx) {

int ch;

isc_uint32_t i;

isc_result_t result;

debug("parse_args");

while ((ch = isc_commandline_parse(argc, argv, PARSE_ARGS_FMT)) != -1) {

switch (ch) {

case 'd':

debugging = ISC_TRUE;

break;

case 'D': /* was -dd */

debugging = ISC_TRUE;

ddebugging = ISC_TRUE;

break;

case 'M':

break;

case 'l':

result = isc_parse_uint32(&i, isc_commandline_argument,

10);

if (result != ISC_R_SUCCESS) {

fprintf(stderr, "bad library debug value "

"'%s'\n", isc_commandline_argument);

exit(1);

}

logdebuglevel = i;

break;

case 'y':

keystr = isc_commandline_argument;

break;

case 'v':

usevc = ISC_TRUE;

break;

case 'k':

keyfile = isc_commandline_argument;

break;

case 'g':

usegsstsig = ISC_TRUE;

use_win2k_gsstsig = ISC_FALSE;

break;

case 'o':

usegsstsig = ISC_TRUE;

use_win2k_gsstsig = ISC_TRUE;

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;

case 'R':

setup_entropy(mctx, isc_commandline_argument, ectx);

break;

default:

fprintf(stderr, "%s: unhandled option: %c\n",

argv[0], isc_commandline_option);

exit(1);

}

}

if (keyfile != NULL && keystr != NULL) {

fprintf(stderr, "%s: cannot specify both -k and -y\n",

argv[0]);

exit(1);

}

#ifdef GSSAPI

if (usegsstsig && (keyfile != NULL || keystr != NULL)) {

fprintf(stderr, "%s: cannot specify -g with -k or -y\n",

argv[0]);

exit(1);

}

#else

if (usegsstsig) {

fprintf(stderr, "%s: cannot specify -g or -o, " \

"program not linked with GSS API Library\n",

argv[0]);

exit(1);

}

#endif

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(NULL, 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()");

/*

retval = parse_name(&cmdline, updatemsg, &name);

if (retval != STATUS_MORE)

return (retval);

/*

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, &region);

if (result == ISC_R_SUCCESS) {

if (!setzoneclass(rdataclass)) {

fprintf(stderr, "class mismatch: %s\n", word);

goto failure;

}

/*

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, &region);

if (result != ISC_R_SUCCESS) {

fprintf(stderr, "invalid type: %s\n", word);

goto failure;

}

} else {

rdataclass = getzoneclass();

result = dns_rdatatype_fromtext(&rdatatype, &region);

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");

dns_rdata_init(rdata);

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;

dns_name_t *hmacname = NULL;

isc_uint16_t digestbits = 0;

char *n;

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);

n = strchr(namestr, ':');

if (n != NULL) {

digestbits = parse_hmac(&hmacname, namestr, n - namestr);

namestr = n + 1;

} else

hmacname = DNS_TSIG_HMACMD5_NAME;

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, hmacname, 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);

}

dst_key_setbits(tsigkey->key, digestbits);

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_ttl(char *cmdline) {

char *word;

isc_result_t result;

isc_uint32_t ttl;

word = nsu_strsep(&cmdline, " \t\r\n");

if (*word == 0) {

fprintf(stderr, "could not ttl\n");

return (STATUS_SYNTAX);

}

result = isc_parse_uint32(&ttl, word, 10);

if (result != ISC_R_SUCCESS)

return (STATUS_SYNTAX);

if (ttl > TTL_MAX) {

fprintf(stderr, "ttl '%s' is out of range (0 to %u)\n",

word, TTL_MAX);

return (STATUS_SYNTAX);

}

default_ttl = ttl;

default_ttl_set = ISC_TRUE;

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()");

/*

retval = parse_name(&cmdline, updatemsg, &name);

if (retval != STATUS_MORE)

return (retval);

result = dns_message_gettemprdata(updatemsg, &rdata);

check_result(result, "dns_message_gettemprdata");

dns_rdata_init(rdata);

/*

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 if (default_ttl_set) {

ttl = default_ttl;

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;

}

/*

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, &region);

if (result == ISC_R_SUCCESS) {

if (!setzoneclass(rdataclass)) {

fprintf(stderr, "class mismatch: %s\n", word);

goto failure;

}

/*

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, &region);

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, &region);

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);

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

setzone(dns_name_t *zonename) {

isc_result_t result;

dns_name_t *name = NULL;

dns_rdataset_t *rdataset = NULL;

result = dns_message_firstname(updatemsg, DNS_SECTION_ZONE);

if (result == ISC_R_SUCCESS) {

dns_message_currentname(updatemsg, DNS_SECTION_ZONE, &name);

dns_message_removename(updatemsg, name, DNS_SECTION_ZONE);

for (rdataset = ISC_LIST_HEAD(name->list);

rdataset != NULL;

rdataset = ISC_LIST_HEAD(name->list)) {

ISC_LIST_UNLINK(name->list, rdataset, link);

dns_rdataset_disassociate(rdataset);

dns_message_puttemprdataset(updatemsg, &rdataset);

}

dns_message_puttempname(updatemsg, &name);

}

if (zonename != NULL) {

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);

}

}

static void

show_message(FILE *stream, dns_message_t *msg, const char *description) {

isc_result_t result;

isc_buffer_t *buf = NULL;

int bufsz;

ddebug("show_message()");

setzone(userzone);

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;

}

fprintf(stream, "%s\n%.*s", description,

(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, "> ");

fflush(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, "debug") == 0) {

if (debugging)

ddebugging = ISC_TRUE;

else

debugging = ISC_TRUE;

return (STATUS_MORE);

}

if (strcasecmp(word, "ttl") == 0)

return (evaluate_ttl(cmdline));

if (strcasecmp(word, "show") == 0) {

show_message(stdout, updatemsg, "Outgoing update query:");

return (STATUS_MORE);

}

if (strcasecmp(word, "answer") == 0) {

if (answer != NULL)

show_message(stdout, answer, "Answer:");

return (STATUS_MORE);

}

if (strcasecmp(word, "key") == 0) {

usegsstsig = ISC_FALSE;

return (evaluate_key(cmdline));

}

if (strcasecmp(word, "gsstsig") == 0) {

#ifdef GSSAPI

usegsstsig = ISC_TRUE;

use_win2k_gsstsig = ISC_FALSE;

#else

fprintf(stderr, "gsstsig not supported\n");

#endif

return (STATUS_MORE);

}

if (strcasecmp(word, "oldgsstsig") == 0) {

#ifdef GSSAPI

usegsstsig = ISC_TRUE;

use_win2k_gsstsig = ISC_TRUE;

#else

fprintf(stderr, "gsstsig not supported\n");

#endif

return (STATUS_MORE);

}

if (strcasecmp(word, "help") == 0) {

fprintf(stdout,

"update delete .... (remove the given record(s) from the zone)\n");

return (STATUS_MORE);

}

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 (!interactive && result == STATUS_SYNTAX)

fatal("syntax error");

}

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:

if (answer->verify_attempted)

ddebug("tsig verification successful");

break;

case DNS_R_CLOCKSKEW:

case DNS_R_EXPECTEDTSIG:

case DNS_R_TSIGERRORSET:

case DNS_R_TSIGVERIFYFAILURE:

case DNS_R_UNEXPECTEDTSIG:

case ISC_R_FAILURE:

#if 0

if (usegsstsig && answer->rcode == dns_rcode_noerror) {

/*

break;

}

#endif

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)

show_message(stderr, answer, "\nReply from update query:");

done:

dns_request_destroy(&request);

if (usegsstsig) {

dns_name_free(&tmpzonename, mctx);

dns_name_free(&restart_master, mctx);

}

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;

unsigned int options = 0;

ddebug("send_update()");

setzone(zonename);

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(stdout, updatemsg, "Outgoing update query:");

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;

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));

reqinfo = NULL;

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, 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)

show_message(stderr, rcvmsg, "Reply from SOA query:");

if (rcvmsg->rcode != dns_rcode_noerror &&

rcvmsg->rcode != dns_rcode_nxdomain)

fatal("response to SOA query was unsuccessful");

if (userzone != NULL && rcvmsg->rcode == dns_rcode_nxdomain) {

char namebuf[DNS_NAME_FORMATSIZE];

dns_name_format(userzone, namebuf, sizeof(namebuf));

error("specified zone '%s' does not exist (NXDOMAIN)",

namebuf);

dns_message_destroy(&rcvmsg);

dns_request_destroy(&request);

dns_message_destroy(&soaquery);

ddebug("Out of recvsoa");

done_update();

return;

}

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);

#ifdef GSSAPI

if (usegsstsig) {

dns_name_init(&tmpzonename, NULL);

dns_name_dup(zonename, mctx, &tmpzonename);

dns_name_init(&restart_master, NULL);

dns_name_dup(&master, mctx, &restart_master);

start_gssrequest(&master);

} else {

send_update(zonename, serveraddr, localaddr);

setzoneclass(dns_rdataclass_none);

}

#else

send_update(zonename, serveraddr, localaddr);

setzoneclass(dns_rdataclass_none);

#endif

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++;

}

#ifdef GSSAPI

static void

start_gssrequest(dns_name_t *master)

{

gss_ctx_id_t context;

isc_buffer_t buf;

isc_result_t result;

isc_uint32_t val = 0;

dns_message_t *rmsg;

dns_request_t *request = NULL;

dns_name_t *servname;

dns_fixedname_t fname;

char namestr[DNS_NAME_FORMATSIZE];

char keystr[DNS_NAME_FORMATSIZE];

debug("start_gssrequest");

usevc = ISC_TRUE;

if (gssring != NULL)

dns_tsigkeyring_destroy(&gssring);

gssring = NULL;

result = dns_tsigkeyring_create(mctx, &gssring);

if (result != ISC_R_SUCCESS)

fatal("dns_tsigkeyring_create failed: %s",

isc_result_totext(result));

dns_name_format(master, namestr, sizeof(namestr));

if (kserver == NULL) {

kserver = isc_mem_get(mctx, sizeof(isc_sockaddr_t));

if (kserver == NULL)

fatal("out of memory");

}

if (userserver == NULL)

get_address(namestr, DNSDEFAULTPORT, kserver);

else

(void)memcpy(kserver, userserver, sizeof(isc_sockaddr_t));

dns_fixedname_init(&fname);

servname = dns_fixedname_name(&fname);

result = isc_string_printf(servicename, sizeof(servicename),

"DNS/%s", namestr);

if (result != ISC_R_SUCCESS)

fatal("isc_string_printf(servicename) failed: %s",

isc_result_totext(result));

isc_buffer_init(&buf, servicename, strlen(servicename));

isc_buffer_add(&buf, strlen(servicename));

result = dns_name_fromtext(servname, &buf, dns_rootname,

ISC_FALSE, NULL);

if (result != ISC_R_SUCCESS)

fatal("dns_name_fromtext(servname) failed: %s",

isc_result_totext(result));

dns_fixedname_init(&fkname);

keyname = dns_fixedname_name(&fkname);

isc_random_get(&val);

result = isc_string_printf(keystr, sizeof(keystr), "%u.sig-%s",

val, namestr);

if (result != ISC_R_SUCCESS)

fatal("isc_string_printf(keystr) failed: %s",

isc_result_totext(result));

isc_buffer_init(&buf, keystr, strlen(keystr));

isc_buffer_add(&buf, strlen(keystr));

result = dns_name_fromtext(keyname, &buf, dns_rootname,

ISC_FALSE, NULL);

if (result != ISC_R_SUCCESS)

fatal("dns_name_fromtext(keyname) failed: %s",

isc_result_totext(result));

/* Windows doesn't recognize name compression in the key name. */

keyname->attributes |= DNS_NAMEATTR_NOCOMPRESS;

rmsg = NULL;

result = dns_message_create(mctx, DNS_MESSAGE_INTENTRENDER, &rmsg);

if (result != ISC_R_SUCCESS)

fatal("dns_message_create failed: %s",

isc_result_totext(result));

/* Build first request. */

context = GSS_C_NO_CONTEXT;

result = dns_tkey_buildgssquery(rmsg, keyname, servname, NULL, 0,

&context, use_win2k_gsstsig);

if (result == ISC_R_FAILURE)

fatal("Check your Kerberos ticket, it may have expired.");

if (result != ISC_R_SUCCESS)

fatal("dns_tkey_buildgssquery failed: %s",

isc_result_totext(result));

send_gssrequest(localaddr, kserver, rmsg, &request, context);

}

static void

send_gssrequest(isc_sockaddr_t *srcaddr, isc_sockaddr_t *destaddr,

dns_message_t *msg, dns_request_t **request,

gss_ctx_id_t context)

{

isc_result_t result;

nsu_gssinfo_t *reqinfo;

unsigned int options = 0;

debug("send_gssrequest");

reqinfo = isc_mem_get(mctx, sizeof(nsu_gssinfo_t));

if (reqinfo == NULL)

fatal("out of memory");

reqinfo->msg = msg;

reqinfo->addr = destaddr;

reqinfo->context = context;

options |= DNS_REQUESTOPT_TCP;

result = dns_request_createvia3(requestmgr, msg, srcaddr, destaddr,

options, tsigkey, FIND_TIMEOUT * 20,

FIND_TIMEOUT, 3, global_task, recvgss,

reqinfo, request);

check_result(result, "dns_request_createvia3");

if (debugging)

show_message(stdout, msg, "Outgoing update query:");

requests++;

}

static void

recvgss(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;

nsu_gssinfo_t *reqinfo;

dns_message_t *tsigquery = NULL;

isc_sockaddr_t *addr;

gss_ctx_id_t context;

isc_buffer_t buf;

dns_name_t *servname;

dns_fixedname_t fname;

UNUSED(task);

ddebug("recvgss()");

requests--;

REQUIRE(event->ev_type == DNS_EVENT_REQUESTDONE);

reqev = (dns_requestevent_t *)event;

request = reqev->request;

eresult = reqev->result;

reqinfo = reqev->ev_arg;

tsigquery = reqinfo->msg;

context = reqinfo->context;

addr = reqinfo->addr;

if (shuttingdown) {

dns_request_destroy(&request);

dns_message_destroy(&tsigquery);

isc_mem_put(mctx, reqinfo, sizeof(nsu_gssinfo_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(tsigquery);

sendrequest(localaddr, &servers[ns_inuse], tsigquery,

&request);

isc_mem_put(mctx, reqinfo, sizeof(nsu_gssinfo_t));

isc_event_free(&event);

return;

}

isc_mem_put(mctx, reqinfo, sizeof(nsu_gssinfo_t));

isc_event_free(&event);

reqev = NULL;

ddebug("recvgss creating 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);

check_result(result, "dns_request_getresponse");

if (debugging)

show_message(stderr, rcvmsg,

"recvmsg reply from GSS-TSIG query");

if (rcvmsg->rcode == dns_rcode_formerr && !tried_other_gsstsig) {

ddebug("recvgss trying %s GSS-TSIG",

use_win2k_gsstsig ? "Standard" : "Win2k");

if (use_win2k_gsstsig)

use_win2k_gsstsig = ISC_FALSE;

else

use_win2k_gsstsig = ISC_TRUE;

tried_other_gsstsig = ISC_TRUE;

start_gssrequest(&restart_master);

goto done;

}

if (rcvmsg->rcode != dns_rcode_noerror &&

rcvmsg->rcode != dns_rcode_nxdomain)

fatal("response to GSS-TSIG query was unsuccessful");

dns_fixedname_init(&fname);

servname = dns_fixedname_name(&fname);

isc_buffer_init(&buf, servicename, strlen(servicename));

isc_buffer_add(&buf, strlen(servicename));

result = dns_name_fromtext(servname, &buf, dns_rootname,