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monero/external/unbound/smallapp/unbound-control.c

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/*
* checkconf/unbound-control.c - remote control utility for unbound.
*
* Copyright (c) 2008, NLnet Labs. All rights reserved.
*
* This software is open source.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the NLNET LABS nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file
*
* The remote control utility contacts the unbound server over ssl and
* sends the command, receives the answer, and displays the result
* from the commandline.
*/
#include "config.h"
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#ifdef HAVE_OPENSSL_SSL_H
#include <openssl/ssl.h>
#endif
#ifdef HAVE_OPENSSL_ERR_H
#include <openssl/err.h>
#endif
#ifdef HAVE_OPENSSL_RAND_H
#include <openssl/rand.h>
#endif
#include "util/log.h"
#include "util/config_file.h"
#include "util/locks.h"
#include "util/net_help.h"
#include "util/shm_side/shm_main.h"
#include "daemon/stats.h"
#include "sldns/wire2str.h"
#include "sldns/pkthdr.h"
#ifdef HAVE_SYS_IPC_H
#include "sys/ipc.h"
#endif
#ifdef HAVE_SYS_SHM_H
#include "sys/shm.h"
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
/** Give unbound-control usage, and exit (1). */
static void
usage(void)
{
printf("Usage: unbound-control [options] command\n");
printf(" Remote control utility for unbound server.\n");
printf("Options:\n");
printf(" -c file config file, default is %s\n", CONFIGFILE);
printf(" -s ip[@port] server address, if omitted config is used.\n");
printf(" -q quiet (don't print anything if it works ok).\n");
printf(" -h show this usage help.\n");
printf("Commands:\n");
printf(" start start server; runs unbound(8)\n");
printf(" stop stops the server\n");
printf(" reload reloads the server\n");
printf(" (this flushes data, stats, requestlist)\n");
printf(" stats print statistics\n");
printf(" stats_noreset peek at statistics\n");
#ifdef HAVE_SHMGET
printf(" stats_shm print statistics using shm\n");
#endif
printf(" status display status of server\n");
printf(" verbosity <number> change logging detail\n");
printf(" log_reopen close and open the logfile\n");
printf(" local_zone <name> <type> add new local zone\n");
printf(" local_zone_remove <name> remove local zone and its contents\n");
printf(" local_data <RR data...> add local data, for example\n");
printf(" local_data www.example.com A 192.0.2.1\n");
printf(" local_data_remove <name> remove local RR data from name\n");
printf(" local_zones, local_zones_remove, local_datas, local_datas_remove\n");
printf(" same, but read list from stdin\n");
printf(" (one entry per line).\n");
printf(" dump_cache print cache to stdout\n");
printf(" load_cache load cache from stdin\n");
printf(" lookup <name> print nameservers for name\n");
printf(" flush <name> flushes common types for name from cache\n");
printf(" types: A, AAAA, MX, PTR, NS,\n");
printf(" SOA, CNAME, DNAME, SRV, NAPTR\n");
printf(" flush_type <name> <type> flush name, type from cache\n");
printf(" flush_zone <name> flush everything at or under name\n");
printf(" from rr and dnssec caches\n");
printf(" flush_bogus flush all bogus data\n");
printf(" flush_negative flush all negative data\n");
printf(" flush_stats flush statistics, make zero\n");
printf(" flush_requestlist drop queries that are worked on\n");
printf(" dump_requestlist show what is worked on by first thread\n");
printf(" flush_infra [all | ip] remove ping, edns for one IP or all\n");
printf(" dump_infra show ping and edns entries\n");
printf(" set_option opt: val set option to value, no reload\n");
printf(" get_option opt get option value\n");
printf(" list_stubs list stub-zones and root hints in use\n");
printf(" list_forwards list forward-zones in use\n");
printf(" list_insecure list domain-insecure zones\n");
printf(" list_local_zones list local-zones in use\n");
printf(" list_local_data list local-data RRs in use\n");
printf(" insecure_add zone add domain-insecure zone\n");
printf(" insecure_remove zone remove domain-insecure zone\n");
printf(" forward_add [+i] zone addr.. add forward-zone with servers\n");
printf(" forward_remove [+i] zone remove forward zone\n");
printf(" stub_add [+ip] zone addr.. add stub-zone with servers\n");
printf(" stub_remove [+i] zone remove stub zone\n");
printf(" +i also do dnssec insecure point\n");
printf(" +p set stub to use priming\n");
printf(" forward [off | addr ...] without arg show forward setup\n");
printf(" or off to turn off root forwarding\n");
printf(" or give list of ip addresses\n");
printf(" ratelimit_list [+a] list ratelimited domains\n");
printf(" ip_ratelimit_list [+a] list ratelimited ip addresses\n");
printf(" +a list all, also not ratelimited\n");
printf(" view_list_local_zones view list local-zones in view\n");
printf(" view_list_local_data view list local-data RRs in view\n");
printf(" view_local_zone view name type add local-zone in view\n");
printf(" view_local_zone_remove view name remove local-zone in view\n");
printf(" view_local_data view RR... add local-data in view\n");
printf(" view_local_data_remove view name remove local-data in view\n");
printf("Version %s\n", PACKAGE_VERSION);
printf("BSD licensed, see LICENSE in source package for details.\n");
printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
exit(1);
}
#ifdef HAVE_SHMGET
/** what to put on statistics lines between var and value, ": " or "=" */
#define SQ "="
/** if true, inhibits a lot of =0 lines from the stats output */
static const int inhibit_zero = 1;
/** divide sum of timers to get average */
static void
timeval_divide(struct timeval* avg, const struct timeval* sum, size_t d)
{
#ifndef S_SPLINT_S
size_t leftover;
if(d == 0) {
avg->tv_sec = 0;
avg->tv_usec = 0;
return;
}
avg->tv_sec = sum->tv_sec / d;
avg->tv_usec = sum->tv_usec / d;
/* handle fraction from seconds divide */
leftover = sum->tv_sec - avg->tv_sec*d;
avg->tv_usec += (leftover*1000000)/d;
#endif
}
/** print unsigned long stats value */
#define PR_UL_NM(str, var) printf("%s."str SQ"%lu\n", nm, (unsigned long)(var));
#define PR_UL(str, var) printf(str SQ"%lu\n", (unsigned long)(var));
#define PR_UL_SUB(str, nm, var) printf(str".%s"SQ"%lu\n", nm, (unsigned long)(var));
#define PR_TIMEVAL(str, var) printf(str SQ ARG_LL "d.%6.6d\n", \
(long long)var.tv_sec, (int)var.tv_usec);
#define PR_LL(str, var) printf(str SQ ARG_LL"d\n", (long long)(var));
/** print stat block */
static void pr_stats(const char* nm, struct stats_info* s)
{
struct timeval avg;
PR_UL_NM("num.queries", s->svr.num_queries);
PR_UL_NM("num.queries_ip_ratelimited",
s->svr.num_queries_ip_ratelimited);
PR_UL_NM("num.cachehits",
s->svr.num_queries - s->svr.num_queries_missed_cache);
PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache);
PR_UL_NM("num.prefetch", s->svr.num_queries_prefetch);
PR_UL_NM("num.zero_ttl", s->svr.zero_ttl_responses);
PR_UL_NM("num.recursivereplies", s->mesh_replies_sent);
#ifdef USE_DNSCRYPT
PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted);
PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert);
PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext);
PR_UL_NM("num.dnscrypt.malformed",
s->svr.num_query_dnscrypt_crypted_malformed);
#endif
printf("%s.requestlist.avg"SQ"%g\n", nm,
(s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
(double)s->svr.sum_query_list_size/
(s->svr.num_queries_missed_cache+
s->svr.num_queries_prefetch) : 0.0);
PR_UL_NM("requestlist.max", s->svr.max_query_list_size);
PR_UL_NM("requestlist.overwritten", s->mesh_jostled);
PR_UL_NM("requestlist.exceeded", s->mesh_dropped);
PR_UL_NM("requestlist.current.all", s->mesh_num_states);
PR_UL_NM("requestlist.current.user", s->mesh_num_reply_states);
timeval_divide(&avg, &s->mesh_replies_sum_wait, s->mesh_replies_sent);
printf("%s.", nm);
PR_TIMEVAL("recursion.time.avg", avg);
printf("%s.recursion.time.median"SQ"%g\n", nm, s->mesh_time_median);
PR_UL_NM("tcpusage", s->svr.tcp_accept_usage);
}
/** print uptime */
static void print_uptime(struct shm_stat_info* shm_stat)
{
PR_TIMEVAL("time.now", shm_stat->time.now);
PR_TIMEVAL("time.up", shm_stat->time.up);
PR_TIMEVAL("time.elapsed", shm_stat->time.elapsed);
}
/** print memory usage */
static void print_mem(struct shm_stat_info* shm_stat)
{
PR_LL("mem.cache.rrset", shm_stat->mem.rrset);
PR_LL("mem.cache.message", shm_stat->mem.msg);
PR_LL("mem.cache.iterator", shm_stat->mem.iter);
PR_LL("mem.cache.validator", shm_stat->mem.val);
#ifdef CLIENT_SUBNET
PR_LL("mem.cache.subnet", shm_stat->mem.subnet);
#endif
}
/** print histogram */
static void print_hist(struct stats_info* s)
{
struct timehist* hist;
size_t i;
hist = timehist_setup();
if(!hist)
fatal_exit("out of memory");
timehist_import(hist, s->svr.hist, NUM_BUCKETS_HIST);
for(i=0; i<hist->num; i++) {
printf("histogram.%6.6d.%6.6d.to.%6.6d.%6.6d=%lu\n",
(int)hist->buckets[i].lower.tv_sec,
(int)hist->buckets[i].lower.tv_usec,
(int)hist->buckets[i].upper.tv_sec,
(int)hist->buckets[i].upper.tv_usec,
(unsigned long)hist->buckets[i].count);
}
timehist_delete(hist);
}
/** print extended */
static void print_extended(struct stats_info* s)
{
int i;
char nm[16];
/* TYPE */
for(i=0; i<STATS_QTYPE_NUM; i++) {
if(inhibit_zero && s->svr.qtype[i] == 0)
continue;
sldns_wire2str_type_buf((uint16_t)i, nm, sizeof(nm));
PR_UL_SUB("num.query.type", nm, s->svr.qtype[i]);
}
if(!inhibit_zero || s->svr.qtype_big) {
PR_UL("num.query.type.other", s->svr.qtype_big);
}
/* CLASS */
for(i=0; i<STATS_QCLASS_NUM; i++) {
if(inhibit_zero && s->svr.qclass[i] == 0)
continue;
sldns_wire2str_class_buf((uint16_t)i, nm, sizeof(nm));
PR_UL_SUB("num.query.class", nm, s->svr.qclass[i]);
}
if(!inhibit_zero || s->svr.qclass_big) {
PR_UL("num.query.class.other", s->svr.qclass_big);
}
/* OPCODE */
for(i=0; i<STATS_OPCODE_NUM; i++) {
if(inhibit_zero && s->svr.qopcode[i] == 0)
continue;
sldns_wire2str_opcode_buf(i, nm, sizeof(nm));
PR_UL_SUB("num.query.opcode", nm, s->svr.qopcode[i]);
}
/* transport */
PR_UL("num.query.tcp", s->svr.qtcp);
PR_UL("num.query.tcpout", s->svr.qtcp_outgoing);
PR_UL("num.query.ipv6", s->svr.qipv6);
/* flags */
PR_UL("num.query.flags.QR", s->svr.qbit_QR);
PR_UL("num.query.flags.AA", s->svr.qbit_AA);
PR_UL("num.query.flags.TC", s->svr.qbit_TC);
PR_UL("num.query.flags.RD", s->svr.qbit_RD);
PR_UL("num.query.flags.RA", s->svr.qbit_RA);
PR_UL("num.query.flags.Z", s->svr.qbit_Z);
PR_UL("num.query.flags.AD", s->svr.qbit_AD);
PR_UL("num.query.flags.CD", s->svr.qbit_CD);
PR_UL("num.query.edns.present", s->svr.qEDNS);
PR_UL("num.query.edns.DO", s->svr.qEDNS_DO);
/* RCODE */
for(i=0; i<STATS_RCODE_NUM; i++) {
/* Always include RCODEs 0-5 */
if(inhibit_zero && i > LDNS_RCODE_REFUSED && s->svr.ans_rcode[i] == 0)
continue;
sldns_wire2str_rcode_buf(i, nm, sizeof(nm));
PR_UL_SUB("num.answer.rcode", nm, s->svr.ans_rcode[i]);
}
if(!inhibit_zero || s->svr.ans_rcode_nodata) {
PR_UL("num.answer.rcode.nodata", s->svr.ans_rcode_nodata);
}
/* validation */
PR_UL("num.answer.secure", s->svr.ans_secure);
PR_UL("num.answer.bogus", s->svr.ans_bogus);
PR_UL("num.rrset.bogus", s->svr.rrset_bogus);
/* threat detection */
PR_UL("unwanted.queries", s->svr.unwanted_queries);
PR_UL("unwanted.replies", s->svr.unwanted_replies);
/* cache counts */
PR_UL("msg.cache.count", s->svr.msg_cache_count);
PR_UL("rrset.cache.count", s->svr.rrset_cache_count);
PR_UL("infra.cache.count", s->svr.infra_cache_count);
PR_UL("key.cache.count", s->svr.key_cache_count);
}
/** print statistics out of memory structures */
static void do_stats_shm(struct config_file* cfg, struct stats_info* stats,
struct shm_stat_info* shm_stat)
{
int i;
char nm[16];
for(i=0; i<cfg->num_threads; i++) {
snprintf(nm, sizeof(nm), "thread%d", i);
pr_stats(nm, &stats[i+1]);
}
pr_stats("total", &stats[0]);
print_uptime(shm_stat);
if(cfg->stat_extended) {
print_mem(shm_stat);
print_hist(stats);
print_extended(stats);
}
}
#endif /* HAVE_SHMGET */
/** print statistics from shm memory segment */
static void print_stats_shm(const char* cfgfile)
{
#ifdef HAVE_SHMGET
struct config_file* cfg;
struct stats_info* stats;
struct shm_stat_info* shm_stat;
int id_ctl, id_arr;
/* read config */
if(!(cfg = config_create()))
fatal_exit("out of memory");
if(!config_read(cfg, cfgfile, NULL))
fatal_exit("could not read config file");
/* get shm segments */
id_ctl = shmget(cfg->shm_key, sizeof(int), SHM_R|SHM_W);
if(id_ctl == -1) {
fatal_exit("shmget(%d): %s", cfg->shm_key, strerror(errno));
}
id_arr = shmget(cfg->shm_key+1, sizeof(int), SHM_R|SHM_W);
if(id_arr == -1) {
fatal_exit("shmget(%d): %s", cfg->shm_key+1, strerror(errno));
}
shm_stat = (struct shm_stat_info*)shmat(id_ctl, NULL, 0);
if(shm_stat == (void*)-1) {
fatal_exit("shmat(%d): %s", id_ctl, strerror(errno));
}
stats = (struct stats_info*)shmat(id_arr, NULL, 0);
if(stats == (void*)-1) {
fatal_exit("shmat(%d): %s", id_arr, strerror(errno));
}
/* print the stats */
do_stats_shm(cfg, stats, shm_stat);
/* shutdown */
shmdt(shm_stat);
shmdt(stats);
config_delete(cfg);
#else
(void)cfgfile;
#endif /* HAVE_SHMGET */
}
/** exit with ssl error */
static void ssl_err(const char* s)
{
fprintf(stderr, "error: %s\n", s);
ERR_print_errors_fp(stderr);
exit(1);
}
/** setup SSL context */
static SSL_CTX*
setup_ctx(struct config_file* cfg)
{
char* s_cert=NULL, *c_key=NULL, *c_cert=NULL;
SSL_CTX* ctx;
if(cfg->remote_control_use_cert) {
s_cert = fname_after_chroot(cfg->server_cert_file, cfg, 1);
c_key = fname_after_chroot(cfg->control_key_file, cfg, 1);
c_cert = fname_after_chroot(cfg->control_cert_file, cfg, 1);
if(!s_cert || !c_key || !c_cert)
fatal_exit("out of memory");
}
ctx = SSL_CTX_new(SSLv23_client_method());
if(!ctx)
ssl_err("could not allocate SSL_CTX pointer");
if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv2) & SSL_OP_NO_SSLv2)
!= SSL_OP_NO_SSLv2)
ssl_err("could not set SSL_OP_NO_SSLv2");
if(cfg->remote_control_use_cert) {
if((SSL_CTX_set_options(ctx, SSL_OP_NO_SSLv3) & SSL_OP_NO_SSLv3)
!= SSL_OP_NO_SSLv3)
ssl_err("could not set SSL_OP_NO_SSLv3");
if(!SSL_CTX_use_certificate_chain_file(ctx,c_cert) ||
!SSL_CTX_use_PrivateKey_file(ctx,c_key,SSL_FILETYPE_PEM)
|| !SSL_CTX_check_private_key(ctx))
ssl_err("Error setting up SSL_CTX client key and cert");
if (SSL_CTX_load_verify_locations(ctx, s_cert, NULL) != 1)
ssl_err("Error setting up SSL_CTX verify, server cert");
SSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, NULL);
free(s_cert);
free(c_key);
free(c_cert);
} else {
/* Use ciphers that don't require authentication */
#ifdef HAVE_SSL_CTX_SET_SECURITY_LEVEL
SSL_CTX_set_security_level(ctx, 0);
#endif
if(!SSL_CTX_set_cipher_list(ctx, "aNULL, eNULL"))
ssl_err("Error setting NULL cipher!");
}
return ctx;
}
/** contact the server with TCP connect */
static int
contact_server(const char* svr, struct config_file* cfg, int statuscmd)
{
struct sockaddr_storage addr;
socklen_t addrlen;
int addrfamily = 0;
int fd;
/* use svr or the first config entry */
if(!svr) {
if(cfg->control_ifs) {
svr = cfg->control_ifs->str;
} else if(cfg->do_ip4) {
svr = "127.0.0.1";
} else {
svr = "::1";
}
/* config 0 addr (everything), means ask localhost */
if(strcmp(svr, "0.0.0.0") == 0)
svr = "127.0.0.1";
else if(strcmp(svr, "::0") == 0 ||
strcmp(svr, "0::0") == 0 ||
strcmp(svr, "0::") == 0 ||
strcmp(svr, "::") == 0)
svr = "::1";
}
if(strchr(svr, '@')) {
if(!extstrtoaddr(svr, &addr, &addrlen))
fatal_exit("could not parse IP@port: %s", svr);
#ifdef HAVE_SYS_UN_H
} else if(svr[0] == '/') {
struct sockaddr_un* usock = (struct sockaddr_un *) &addr;
usock->sun_family = AF_LOCAL;
#ifdef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN
usock->sun_len = (unsigned)sizeof(usock);
#endif
(void)strlcpy(usock->sun_path, svr, sizeof(usock->sun_path));
addrlen = (socklen_t)sizeof(struct sockaddr_un);
addrfamily = AF_LOCAL;
#endif
} else {
if(!ipstrtoaddr(svr, cfg->control_port, &addr, &addrlen))
fatal_exit("could not parse IP: %s", svr);
}
if(addrfamily == 0)
addrfamily = addr_is_ip6(&addr, addrlen)?AF_INET6:AF_INET;
fd = socket(addrfamily, SOCK_STREAM, 0);
if(fd == -1) {
#ifndef USE_WINSOCK
fatal_exit("socket: %s", strerror(errno));
#else
fatal_exit("socket: %s", wsa_strerror(WSAGetLastError()));
#endif
}
if(connect(fd, (struct sockaddr*)&addr, addrlen) < 0) {
#ifndef USE_WINSOCK
log_err_addr("connect", strerror(errno), &addr, addrlen);
if(errno == ECONNREFUSED && statuscmd) {
printf("unbound is stopped\n");
exit(3);
}
#else
log_err_addr("connect", wsa_strerror(WSAGetLastError()), &addr, addrlen);
if(WSAGetLastError() == WSAECONNREFUSED && statuscmd) {
printf("unbound is stopped\n");
exit(3);
}
#endif
exit(1);
}
return fd;
}
/** setup SSL on the connection */
static SSL*
setup_ssl(SSL_CTX* ctx, int fd, struct config_file* cfg)
{
SSL* ssl;
X509* x;
int r;
ssl = SSL_new(ctx);
if(!ssl)
ssl_err("could not SSL_new");
SSL_set_connect_state(ssl);
(void)SSL_set_mode(ssl, SSL_MODE_AUTO_RETRY);
if(!SSL_set_fd(ssl, fd))
ssl_err("could not SSL_set_fd");
while(1) {
ERR_clear_error();
if( (r=SSL_do_handshake(ssl)) == 1)
break;
r = SSL_get_error(ssl, r);
if(r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
ssl_err("SSL handshake failed");
/* wants to be called again */
}
/* check authenticity of server */
if(SSL_get_verify_result(ssl) != X509_V_OK)
ssl_err("SSL verification failed");
if(cfg->remote_control_use_cert) {
x = SSL_get_peer_certificate(ssl);
if(!x)
ssl_err("Server presented no peer certificate");
X509_free(x);
}
return ssl;
}
/** send stdin to server */
static void
send_file(SSL* ssl, FILE* in, char* buf, size_t sz)
{
while(fgets(buf, (int)sz, in)) {
if(SSL_write(ssl, buf, (int)strlen(buf)) <= 0)
ssl_err("could not SSL_write contents");
}
}
/** send end-of-file marker to server */
static void
send_eof(SSL* ssl)
{
char e[] = {0x04, 0x0a};
if(SSL_write(ssl, e, (int)sizeof(e)) <= 0)
ssl_err("could not SSL_write end-of-file marker");
}
/** send command and display result */
static int
go_cmd(SSL* ssl, int quiet, int argc, char* argv[])
{
char pre[10];
const char* space=" ";
const char* newline="\n";
int was_error = 0, first_line = 1;
int r, i;
char buf[1024];
snprintf(pre, sizeof(pre), "UBCT%d ", UNBOUND_CONTROL_VERSION);
if(SSL_write(ssl, pre, (int)strlen(pre)) <= 0)
ssl_err("could not SSL_write");
for(i=0; i<argc; i++) {
if(SSL_write(ssl, space, (int)strlen(space)) <= 0)
ssl_err("could not SSL_write");
if(SSL_write(ssl, argv[i], (int)strlen(argv[i])) <= 0)
ssl_err("could not SSL_write");
}
if(SSL_write(ssl, newline, (int)strlen(newline)) <= 0)
ssl_err("could not SSL_write");
if(argc == 1 && strcmp(argv[0], "load_cache") == 0) {
send_file(ssl, stdin, buf, sizeof(buf));
}
else if(argc == 1 && (strcmp(argv[0], "local_zones") == 0 ||
strcmp(argv[0], "local_zones_remove") == 0 ||
strcmp(argv[0], "local_datas") == 0 ||
strcmp(argv[0], "local_datas_remove") == 0)) {
send_file(ssl, stdin, buf, sizeof(buf));
send_eof(ssl);
}
while(1) {
ERR_clear_error();
if((r = SSL_read(ssl, buf, (int)sizeof(buf)-1)) <= 0) {
if(SSL_get_error(ssl, r) == SSL_ERROR_ZERO_RETURN) {
/* EOF */
break;
}
ssl_err("could not SSL_read");
}
buf[r] = 0;
if(first_line && strncmp(buf, "error", 5) == 0) {
printf("%s", buf);
was_error = 1;
} else if (!quiet)
printf("%s", buf);
first_line = 0;
}
return was_error;
}
/** go ahead and read config, contact server and perform command and display */
static int
go(const char* cfgfile, char* svr, int quiet, int argc, char* argv[])
{
struct config_file* cfg;
int fd, ret;
SSL_CTX* ctx;
SSL* ssl;
/* read config */
if(!(cfg = config_create()))
fatal_exit("out of memory");
if(!config_read(cfg, cfgfile, NULL))
fatal_exit("could not read config file");
if(!cfg->remote_control_enable)
log_warn("control-enable is 'no' in the config file.");
#ifdef UB_ON_WINDOWS
w_config_adjust_directory(cfg);
#endif
ctx = setup_ctx(cfg);
/* contact server */
fd = contact_server(svr, cfg, argc>0&&strcmp(argv[0],"status")==0);
ssl = setup_ssl(ctx, fd, cfg);
/* send command */
ret = go_cmd(ssl, quiet, argc, argv);
SSL_free(ssl);
#ifndef USE_WINSOCK
close(fd);
#else
closesocket(fd);
#endif
SSL_CTX_free(ctx);
config_delete(cfg);
return ret;
}
/** getopt global, in case header files fail to declare it. */
extern int optind;
/** getopt global, in case header files fail to declare it. */
extern char* optarg;
/** Main routine for unbound-control */
int main(int argc, char* argv[])
{
int c, ret;
int quiet = 0;
const char* cfgfile = CONFIGFILE;
char* svr = NULL;
#ifdef USE_WINSOCK
int r;
WSADATA wsa_data;
#endif
#ifdef USE_THREAD_DEBUG
/* stop the file output from unbound-control, overwites the servers */
extern int check_locking_order;
check_locking_order = 0;
#endif /* USE_THREAD_DEBUG */
log_ident_set("unbound-control");
log_init(NULL, 0, NULL);
checklock_start();
#ifdef USE_WINSOCK
/* use registry config file in preference to compiletime location */
if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile")))
cfgfile = CONFIGFILE;
#endif
/* parse the options */
while( (c=getopt(argc, argv, "c:s:qh")) != -1) {
switch(c) {
case 'c':
cfgfile = optarg;
break;
case 's':
svr = optarg;
break;
case 'q':
quiet = 1;
break;
case '?':
case 'h':
default:
usage();
}
}
argc -= optind;
argv += optind;
if(argc == 0)
usage();
if(argc >= 1 && strcmp(argv[0], "start")==0) {
if(execlp("unbound", "unbound", "-c", cfgfile,
(char*)NULL) < 0) {
fatal_exit("could not exec unbound: %s",
strerror(errno));
}
}
if(argc >= 1 && strcmp(argv[0], "stats_shm")==0) {
print_stats_shm(cfgfile);
return 0;
}
#ifdef USE_WINSOCK
if((r = WSAStartup(MAKEWORD(2,2), &wsa_data)) != 0)
fatal_exit("WSAStartup failed: %s", wsa_strerror(r));
#endif
#ifdef HAVE_ERR_LOAD_CRYPTO_STRINGS
ERR_load_crypto_strings();
#endif
ERR_load_SSL_strings();
#if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_CRYPTO)
OpenSSL_add_all_algorithms();
#else
OPENSSL_init_crypto(OPENSSL_INIT_ADD_ALL_CIPHERS
| OPENSSL_INIT_ADD_ALL_DIGESTS
| OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
#endif
#if OPENSSL_VERSION_NUMBER < 0x10100000 || !defined(HAVE_OPENSSL_INIT_SSL)
(void)SSL_library_init();
#else
(void)OPENSSL_init_ssl(0, NULL);
#endif
if(!RAND_status()) {
/* try to seed it */
unsigned char buf[256];
unsigned int seed=(unsigned)time(NULL) ^ (unsigned)getpid();
unsigned int v = seed;
size_t i;
for(i=0; i<256/sizeof(v); i++) {
memmove(buf+i*sizeof(v), &v, sizeof(v));
v = v*seed + (unsigned int)i;
}
RAND_seed(buf, 256);
log_warn("no entropy, seeding openssl PRNG with time\n");
}
ret = go(cfgfile, svr, quiet, argc, argv);
#ifdef USE_WINSOCK
WSACleanup();
#endif
checklock_stop();
return ret;
}
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