0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson

a2b565626ba9a98eecc7b82cb86c6d68c38d3d94Michael Sawyer

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <config.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson

9570ddcd41e2b0a0e124f0fa50653f73dfc1ef46Evan Hunt#include <ctype.h>

c51203011182577cbb53a6d16d496aa9697fff5cAndreas Gustafsson#include <errno.h>

c51203011182577cbb53a6d16d496aa9697fff5cAndreas Gustafsson#include <limits.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <stdlib.h>

6c52944ef2281095d1c317a45ea013b8f3cfa135Mark Andrews#include <unistd.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/app.h>

6c52944ef2281095d1c317a45ea013b8f3cfa135Mark Andrews#include <isc/base64.h>

6c52944ef2281095d1c317a45ea013b8f3cfa135Mark Andrews#include <isc/buffer.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/commandline.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/entropy.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/event.h>

5a3e08cbb2fc02f38edd784be8fc0549b92f02e8Michael Sawyer#include <isc/hash.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/lex.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/mem.h>

0e9dcd548051a8ec34744bfa18b4e09fea742a39Andreas Gustafsson#include <isc/parseint.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/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/tsig.h>

#include <dst/dst.h>

#include <lwres/lwres.h>

#include <lwres/net.h>

#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_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()");

/*

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");

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()");

/*

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;

/*

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;

}

/*

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);

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;