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unbound/smallapp/unbound-checkconf.c
W.C.A. Wijngaards ff653a7ef8 Call module init init again, and new function startup and destartup. 
NULL can be used if the function is not used. Open shared ports during
reload. Deinit is called during reload.
2024-07-01 16:10:07 +02:00

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/*
* smallapp/unbound-checkconf.c - config file checker for unbound.conf file.
*
* Copyright (c) 2007, 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 config checker checks for syntax and other errors in the unbound.conf
* file, and can be used to check for errors before the server is started
* or sigHUPped.
* Exit status 1 means an error.
*/
#include "config.h"
#include <ctype.h>
#include "util/log.h"
#include "util/config_file.h"
#include "util/module.h"
#include "util/net_help.h"
#include "util/regional.h"
#include "iterator/iterator.h"
#include "iterator/iter_fwd.h"
#include "iterator/iter_hints.h"
#include "validator/validator.h"
#include "services/localzone.h"
#include "services/listen_dnsport.h"
#include "services/view.h"
#include "services/authzone.h"
#include "respip/respip.h"
#include "sldns/sbuffer.h"
#include "sldns/str2wire.h"
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_GLOB_H
#include <glob.h>
#endif
#ifdef WITH_PYTHONMODULE
#include "pythonmod/pythonmod.h"
#endif
#ifdef CLIENT_SUBNET
#include "edns-subnet/subnet-whitelist.h"
#endif
/** Give checkconf usage, and exit (1). */
static void
usage(void)
{
printf("Usage: unbound-checkconf [file]\n");
printf(" Checks unbound configuration file for errors.\n");
printf("file if omitted %s is used.\n", CONFIGFILE);
printf("-o option print value of option to stdout.\n");
printf("-f output full pathname with chroot applied, eg. with -o pidfile.\n");
printf("-q quiet (suppress output on success).\n");
printf("-h show this usage help.\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);
}
/**
* Print given option to stdout
* @param cfg: config
* @param opt: option name without trailing :.
* This is different from config_set_option.
* @param final: if final pathname with chroot applied has to be printed.
*/
static void
print_option(struct config_file* cfg, const char* opt, int final)
{
if(strcmp(opt, "pidfile") == 0 && final) {
char *p = fname_after_chroot(cfg->pidfile, cfg, 1);
if(!p) fatal_exit("out of memory");
printf("%s\n", p);
free(p);
return;
}
if(strcmp(opt, "auto-trust-anchor-file") == 0 && final) {
struct config_strlist* s = cfg->auto_trust_anchor_file_list;
for(; s; s=s->next) {
char *p = fname_after_chroot(s->str, cfg, 1);
if(!p) fatal_exit("out of memory");
printf("%s\n", p);
free(p);
}
return;
}
if(!config_get_option(cfg, opt, config_print_func, stdout))
fatal_exit("cannot print option '%s'", opt);
}
/** check if module works with config */
static void
check_mod(struct config_file* cfg, struct module_func_block* fb)
{
struct module_env env;
memset(&env, 0, sizeof(env));
env.cfg = cfg;
env.scratch = regional_create();
env.scratch_buffer = sldns_buffer_new(BUFSIZ);
if(!env.scratch || !env.scratch_buffer)
fatal_exit("out of memory");
if(!edns_known_options_init(&env))
fatal_exit("out of memory");
if(fb->startup && !(*fb->startup)(&env, 0))
fatal_exit("bad config during startup for %s module", fb->name);
if(!(*fb->init)(&env, 0))
fatal_exit("bad config during init for %s module", fb->name);
(*fb->deinit)(&env, 0);
if(fb->destartup)
(*fb->destartup)(&env, 0);
sldns_buffer_free(env.scratch_buffer);
regional_destroy(env.scratch);
edns_known_options_delete(&env);
}
/** true if addr is a localhost address, 127.0.0.1 or ::1 (with maybe "@port"
* after it) */
static int
str_addr_is_localhost(const char* a)
{
if(strncmp(a, "127.", 4) == 0) return 1;
if(strncmp(a, "::1", 3) == 0) return 1;
return 0;
}
/** check do-not-query-localhost */
static void
donotquerylocalhostcheck(struct config_file* cfg)
{
if(cfg->donotquery_localhost) {
struct config_stub* p;
struct config_strlist* s;
for(p=cfg->forwards; p; p=p->next) {
for(s=p->addrs; s; s=s->next) {
if(str_addr_is_localhost(s->str)) {
fprintf(stderr, "unbound-checkconf: warning: forward-addr: '%s' is specified for forward-zone: '%s', but do-not-query-localhost: yes means that the address will not be used for lookups.\n",
s->str, p->name);
}
}
}
for(p=cfg->stubs; p; p=p->next) {
for(s=p->addrs; s; s=s->next) {
if(str_addr_is_localhost(s->str)) {
fprintf(stderr, "unbound-checkconf: warning: stub-addr: '%s' is specified for stub-zone: '%s', but do-not-query-localhost: yes means that the address will not be used for lookups.\n",
s->str, p->name);
}
}
}
}
}
/** check localzones */
static void
localzonechecks(struct config_file* cfg)
{
struct local_zones* zs;
if(!(zs = local_zones_create()))
fatal_exit("out of memory");
if(!local_zones_apply_cfg(zs, cfg))
fatal_exit("failed local-zone, local-data configuration");
local_zones_delete(zs);
}
/** checks for acl and views */
static void
acl_view_tag_checks(struct config_file* cfg, struct views* views)
{
int d;
struct sockaddr_storage a;
socklen_t alen;
struct config_str2list* acl;
struct config_str3list* s3;
struct config_strbytelist* sb;
/* acl_view */
for(acl=cfg->acl_view; acl; acl = acl->next) {
struct view* v;
if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen,
&d)) {
fatal_exit("cannot parse access-control-view "
"address %s %s", acl->str, acl->str2);
}
v = views_find_view(views, acl->str2, 0);
if(!v) {
fatal_exit("cannot find view for "
"access-control-view: %s %s",
acl->str, acl->str2);
}
lock_rw_unlock(&v->lock);
}
/* acl_tags */
for(sb=cfg->acl_tags; sb; sb = sb->next) {
if(!netblockstrtoaddr(sb->str, UNBOUND_DNS_PORT, &a, &alen,
&d)) {
fatal_exit("cannot parse access-control-tags "
"address %s", sb->str);
}
}
/* acl_tag_actions */
for(s3=cfg->acl_tag_actions; s3; s3 = s3->next) {
enum localzone_type t;
if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen,
&d)) {
fatal_exit("cannot parse access-control-tag-actions "
"address %s %s %s",
s3->str, s3->str2, s3->str3);
}
if(find_tag_id(cfg, s3->str2) == -1) {
fatal_exit("cannot parse tag %s (define-tag it), "
"for access-control-tag-actions: %s %s %s",
s3->str2, s3->str, s3->str2, s3->str3);
}
if(!local_zone_str2type(s3->str3, &t)) {
fatal_exit("cannot parse access control action type %s"
" for access-control-tag-actions: %s %s %s",
s3->str3, s3->str, s3->str2, s3->str3);
}
}
/* acl_tag_datas */
for(s3=cfg->acl_tag_datas; s3; s3 = s3->next) {
char buf[65536];
uint8_t rr[LDNS_RR_BUF_SIZE];
size_t len = sizeof(rr);
int res;
if(!netblockstrtoaddr(s3->str, UNBOUND_DNS_PORT, &a, &alen,
&d)) {
fatal_exit("cannot parse access-control-tag-datas address %s %s '%s'",
s3->str, s3->str2, s3->str3);
}
if(find_tag_id(cfg, s3->str2) == -1) {
fatal_exit("cannot parse tag %s (define-tag it), "
"for access-control-tag-datas: %s %s '%s'",
s3->str2, s3->str, s3->str2, s3->str3);
}
/* '.' is sufficient for validation, and it makes the call to
* sldns_wirerr_get_type() simpler below. */
snprintf(buf, sizeof(buf), "%s %s", ".", s3->str3);
res = sldns_str2wire_rr_buf(buf, rr, &len, NULL, 3600, NULL,
0, NULL, 0);
if(res != 0) {
fatal_exit("cannot parse rr data [char %d] parse error %s, for access-control-tag-datas: %s %s '%s'",
(int)LDNS_WIREPARSE_OFFSET(res)-2,
sldns_get_errorstr_parse(res),
s3->str, s3->str2, s3->str3);
}
}
}
/** check view and response-ip configuration */
static void
view_and_respipchecks(struct config_file* cfg)
{
struct views* views = NULL;
struct respip_set* respip = NULL;
int ignored = 0;
if(!(views = views_create()))
fatal_exit("Could not create views: out of memory");
if(!(respip = respip_set_create()))
fatal_exit("Could not create respip set: out of memory");
if(!views_apply_cfg(views, cfg))
fatal_exit("Could not set up views");
if(!respip_global_apply_cfg(respip, cfg))
fatal_exit("Could not setup respip set");
if(!respip_views_apply_cfg(views, cfg, &ignored))
fatal_exit("Could not setup per-view respip sets");
acl_view_tag_checks(cfg, views);
views_delete(views);
respip_set_delete(respip);
}
/** emit warnings for IP in hosts */
static void
warn_hosts(const char* typ, struct config_stub* list)
{
struct sockaddr_storage a;
socklen_t alen;
struct config_stub* s;
struct config_strlist* h;
for(s=list; s; s=s->next) {
for(h=s->hosts; h; h=h->next) {
if(extstrtoaddr(h->str, &a, &alen, UNBOUND_DNS_PORT)) {
fprintf(stderr, "unbound-checkconf: warning:"
" %s %s: \"%s\" is an IP%s address, "
"and when looked up as a host name "
"during use may not resolve.\n",
s->name, typ, h->str,
addr_is_ip6(&a, alen)?"6":"4");
}
}
}
}
/** check interface strings */
static void
interfacechecks(struct config_file* cfg)
{
int d;
struct sockaddr_storage a;
socklen_t alen;
int i, j, i2, j2;
char*** resif = NULL;
int* num_resif = NULL;
char portbuf[32];
snprintf(portbuf, sizeof(portbuf), "%d", cfg->port);
if(cfg->num_ifs != 0) {
resif = (char***)calloc(cfg->num_ifs, sizeof(char**));
if(!resif) fatal_exit("malloc failure");
num_resif = (int*)calloc(cfg->num_ifs, sizeof(int));
if(!num_resif) fatal_exit("malloc failure");
}
for(i=0; i<cfg->num_ifs; i++) {
/* search for duplicates in IP or ifname arguments */
for(i2=0; i2<i; i2++) {
if(strcmp(cfg->ifs[i], cfg->ifs[i2]) == 0) {
fatal_exit("interface: %s present twice, "
"cannot bind same ports twice.",
cfg->ifs[i]);
}
}
if(!resolve_interface_names(&cfg->ifs[i], 1, NULL, &resif[i],
&num_resif[i])) {
fatal_exit("could not resolve interface names, for %s",
cfg->ifs[i]);
}
/* check for port combinations that are not supported */
if(if_is_pp2(resif[i][0], portbuf, cfg->proxy_protocol_port)) {
if(if_is_dnscrypt(resif[i][0], portbuf,
cfg->dnscrypt_port)) {
fatal_exit("PROXYv2 and DNSCrypt combination not "
"supported!");
} else if(if_is_https(resif[i][0], portbuf,
cfg->https_port)) {
fatal_exit("PROXYv2 and DoH combination not "
"supported!");
}
}
/* search for duplicates in the returned addresses */
for(j=0; j<num_resif[i]; j++) {
if(!extstrtoaddr(resif[i][j], &a, &alen, cfg->port)) {
if(strcmp(cfg->ifs[i], resif[i][j]) != 0)
fatal_exit("cannot parse interface address '%s' from the interface specified as '%s'",
resif[i][j], cfg->ifs[i]);
else
fatal_exit("cannot parse interface specified as '%s'",
cfg->ifs[i]);
}
for(i2=0; i2<i; i2++) {
for(j2=0; j2<num_resif[i2]; j2++) {
if(strcmp(resif[i][j], resif[i2][j2])
== 0) {
char info1[1024], info2[1024];
if(strcmp(cfg->ifs[i], resif[i][j]) != 0)
snprintf(info1, sizeof(info1), "address %s from interface: %s", resif[i][j], cfg->ifs[i]);
else snprintf(info1, sizeof(info1), "interface: %s", cfg->ifs[i]);
if(strcmp(cfg->ifs[i2], resif[i2][j2]) != 0)
snprintf(info2, sizeof(info2), "address %s from interface: %s", resif[i2][j2], cfg->ifs[i2]);
else snprintf(info2, sizeof(info2), "interface: %s", cfg->ifs[i2]);
fatal_exit("%s present twice, cannot bind the same ports twice. The first entry is %s and the second is %s", resif[i][j], info2, info1);
}
}
}
}
}
for(i=0; i<cfg->num_ifs; i++) {
config_del_strarray(resif[i], num_resif[i]);
}
free(resif);
free(num_resif);
for(i=0; i<cfg->num_out_ifs; i++) {
if(!ipstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen) &&
!netblockstrtoaddr(cfg->out_ifs[i], UNBOUND_DNS_PORT, &a, &alen, &d)) {
fatal_exit("cannot parse outgoing-interface "
"specified as '%s'", cfg->out_ifs[i]);
}
for(j=0; j<cfg->num_out_ifs; j++) {
if(i!=j && strcmp(cfg->out_ifs[i], cfg->out_ifs[j])==0)
fatal_exit("outgoing-interface: %s present "
"twice, cannot bind same ports twice.",
cfg->out_ifs[i]);
}
}
}
/** check interface-automatic-ports */
static void
ifautomaticportschecks(char* ifautomaticports)
{
char* now = ifautomaticports;
while(now && *now) {
char* after;
int extraport;
while(isspace((unsigned char)*now))
now++;
if(!*now)
break;
after = now;
extraport = (int)strtol(now, &after, 10);
if(extraport < 0 || extraport > 65535)
fatal_exit("interface-automatic-ports: port out of range at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports);
if(extraport == 0 && now == after)
fatal_exit("interface-automatic-ports: parse error at position %d in '%s'", (int)(now-ifautomaticports)+1, ifautomaticports);
now = after;
}
}
/** check acl ips */
static void
aclchecks(struct config_file* cfg)
{
int d;
struct sockaddr_storage a;
socklen_t alen;
struct config_str2list* acl;
for(acl=cfg->acls; acl; acl = acl->next) {
if(!netblockstrtoaddr(acl->str, UNBOUND_DNS_PORT, &a, &alen,
&d)) {
fatal_exit("cannot parse access control address %s %s",
acl->str, acl->str2);
}
}
}
/** check tcp connection limit ips */
static void
tcpconnlimitchecks(struct config_file* cfg)
{
int d;
struct sockaddr_storage a;
socklen_t alen;
struct config_str2list* tcl;
for(tcl=cfg->tcp_connection_limits; tcl; tcl = tcl->next) {
if(!netblockstrtoaddr(tcl->str, UNBOUND_DNS_PORT, &a, &alen,
&d)) {
fatal_exit("cannot parse tcp connection limit address %s %s",
tcl->str, tcl->str2);
}
}
}
/** true if fname is a file */
static int
is_file(const char* fname)
{
struct stat buf;
if(stat(fname, &buf) < 0) {
if(errno==EACCES) {
printf("warning: no search permission for one of the directories in path: %s\n", fname);
return 1;
}
perror(fname);
return 0;
}
if(S_ISDIR(buf.st_mode)) {
printf("%s is not a file\n", fname);
return 0;
}
return 1;
}
/** true if fname is a directory */
static int
is_dir(const char* fname)
{
struct stat buf;
if(stat(fname, &buf) < 0) {
if(errno==EACCES) {
printf("warning: no search permission for one of the directories in path: %s\n", fname);
return 1;
}
perror(fname);
return 0;
}
if(!(S_ISDIR(buf.st_mode))) {
printf("%s is not a directory\n", fname);
return 0;
}
return 1;
}
/** get base dir of a fname */
static char*
basedir(char* fname)
{
char* rev;
if(!fname) fatal_exit("out of memory");
rev = strrchr(fname, '/');
if(!rev) return NULL;
if(fname == rev) return NULL;
rev[0] = 0;
return fname;
}
/** check chroot for a file string */
static void
check_chroot_string(const char* desc, char** ss,
const char* chrootdir, struct config_file* cfg)
{
char* str = *ss;
if(str && str[0]) {
*ss = fname_after_chroot(str, cfg, 1);
if(!*ss) fatal_exit("out of memory");
if(!is_file(*ss)) {
if(chrootdir && chrootdir[0])
fatal_exit("%s: \"%s\" does not exist in "
"chrootdir %s", desc, str, chrootdir);
else
fatal_exit("%s: \"%s\" does not exist",
desc, str);
}
/* put in a new full path for continued checking */
free(str);
}
}
/** check file list, every file must be inside the chroot location */
static void
check_chroot_filelist(const char* desc, struct config_strlist* list,
const char* chrootdir, struct config_file* cfg)
{
struct config_strlist* p;
for(p=list; p; p=p->next) {
check_chroot_string(desc, &p->str, chrootdir, cfg);
}
}
/** check file list, with wildcard processing */
static void
check_chroot_filelist_wild(const char* desc, struct config_strlist* list,
const char* chrootdir, struct config_file* cfg)
{
struct config_strlist* p;
for(p=list; p; p=p->next) {
#ifdef HAVE_GLOB
if(strchr(p->str, '*') || strchr(p->str, '[') ||
strchr(p->str, '?') || strchr(p->str, '{') ||
strchr(p->str, '~')) {
char* s = p->str;
/* adjust whole pattern for chroot and check later */
p->str = fname_after_chroot(p->str, cfg, 1);
free(s);
} else
#endif /* HAVE_GLOB */
check_chroot_string(desc, &p->str, chrootdir, cfg);
}
}
#ifdef CLIENT_SUBNET
/** check ECS configuration */
static void
ecs_conf_checks(struct config_file* cfg)
{
struct ecs_whitelist* whitelist = NULL;
if(!(whitelist = ecs_whitelist_create()))
fatal_exit("Could not create ednssubnet whitelist: out of memory");
if(!ecs_whitelist_apply_cfg(whitelist, cfg))
fatal_exit("Could not setup ednssubnet whitelist");
ecs_whitelist_delete(whitelist);
}
#endif /* CLIENT_SUBNET */
/** check that the modules exist, are compiled in */
static void
check_modules_exist(const char* module_conf)
{
const char** names = module_list_avail();
const char* s = module_conf;
while(*s) {
int i = 0;
int is_ok = 0;
while(*s && isspace((unsigned char)*s))
s++;
if(!*s) break;
while(names[i]) {
if(strncmp(names[i], s, strlen(names[i])) == 0) {
is_ok = 1;
break;
}
i++;
}
if(is_ok == 0) {
char n[64];
size_t j;
n[0]=0;
n[sizeof(n)-1]=0;
for(j=0; j<sizeof(n)-1; j++) {
if(!s[j] || isspace((unsigned char)s[j])) {
n[j] = 0;
break;
}
n[j] = s[j];
}
fatal_exit("module_conf lists module '%s' but that "
"module is not available.", n);
}
s += strlen(names[i]);
}
}
/** check configuration for errors */
static void
morechecks(struct config_file* cfg)
{
warn_hosts("stub-host", cfg->stubs);
warn_hosts("forward-host", cfg->forwards);
interfacechecks(cfg);
ifautomaticportschecks(cfg->if_automatic_ports);
aclchecks(cfg);
tcpconnlimitchecks(cfg);
if(cfg->verbosity < 0)
fatal_exit("verbosity value < 0");
if(cfg->num_threads <= 0 || cfg->num_threads > 10000)
fatal_exit("num_threads value weird");
if(!cfg->do_ip4 && !cfg->do_ip6)
fatal_exit("ip4 and ip6 are both disabled, pointless");
if(!cfg->do_ip4 && cfg->prefer_ip4)
fatal_exit("cannot prefer and disable ip4, pointless");
if(!cfg->do_ip6 && cfg->prefer_ip6)
fatal_exit("cannot prefer and disable ip6, pointless");
if(!cfg->do_udp && !cfg->do_tcp)
fatal_exit("udp and tcp are both disabled, pointless");
if(cfg->edns_buffer_size > cfg->msg_buffer_size)
fatal_exit("edns-buffer-size larger than msg-buffer-size, "
"answers will not fit in processing buffer");
#ifdef UB_ON_WINDOWS
w_config_adjust_directory(cfg);
#endif
if(cfg->chrootdir && cfg->chrootdir[0] &&
cfg->chrootdir[strlen(cfg->chrootdir)-1] == '/')
fatal_exit("chootdir %s has trailing slash '/' please remove.",
cfg->chrootdir);
if(cfg->chrootdir && cfg->chrootdir[0] &&
!is_dir(cfg->chrootdir)) {
fatal_exit("bad chroot directory");
}
if(cfg->directory && cfg->directory[0]) {
char* ad = fname_after_chroot(cfg->directory, cfg, 0);
if(!ad) fatal_exit("out of memory");
if(!is_dir(ad)) fatal_exit("bad chdir directory");
free(ad);
}
if( (cfg->chrootdir && cfg->chrootdir[0]) ||
(cfg->directory && cfg->directory[0])) {
if(cfg->pidfile && cfg->pidfile[0]) {
char* ad = (cfg->pidfile[0]=='/')?strdup(cfg->pidfile):
fname_after_chroot(cfg->pidfile, cfg, 1);
char* bd = basedir(ad);
if(bd && !is_dir(bd))
fatal_exit("pidfile directory does not exist");
free(ad);
}
if(cfg->logfile && cfg->logfile[0]) {
char* ad = fname_after_chroot(cfg->logfile, cfg, 1);
char* bd = basedir(ad);
if(bd && !is_dir(bd))
fatal_exit("logfile directory does not exist");
free(ad);
}
}
check_chroot_filelist("file with root-hints",
cfg->root_hints, cfg->chrootdir, cfg);
check_chroot_filelist("trust-anchor-file",
cfg->trust_anchor_file_list, cfg->chrootdir, cfg);
check_chroot_filelist("auto-trust-anchor-file",
cfg->auto_trust_anchor_file_list, cfg->chrootdir, cfg);
check_chroot_filelist_wild("trusted-keys-file",
cfg->trusted_keys_file_list, cfg->chrootdir, cfg);
if(cfg->disable_edns_do && strstr(cfg->module_conf, "validator")
&& (cfg->trust_anchor_file_list
|| cfg->trust_anchor_list
|| cfg->auto_trust_anchor_file_list
|| cfg->trusted_keys_file_list)) {
char* key = NULL;
if(cfg->auto_trust_anchor_file_list)
key = cfg->auto_trust_anchor_file_list->str;
if(!key && cfg->trust_anchor_file_list)
key = cfg->trust_anchor_file_list->str;
if(!key && cfg->trust_anchor_list)
key = cfg->trust_anchor_list->str;
if(!key && cfg->trusted_keys_file_list)
key = cfg->trusted_keys_file_list->str;
if(!key) key = "";
fatal_exit("disable-edns-do does not allow DNSSEC to work, but the validator module uses a trust anchor %s, turn off disable-edns-do or disable validation", key);
}
#ifdef USE_IPSECMOD
if(cfg->ipsecmod_enabled && strstr(cfg->module_conf, "ipsecmod")) {
/* only check hook if enabled */
check_chroot_string("ipsecmod-hook", &cfg->ipsecmod_hook,
cfg->chrootdir, cfg);
}
#endif
/* remove chroot setting so that modules are not stripping pathnames */
free(cfg->chrootdir);
cfg->chrootdir = NULL;
/* check that the modules listed in module_conf exist */
check_modules_exist(cfg->module_conf);
/* Respip is known to *not* work with dns64. */
if(strcmp(cfg->module_conf, "iterator") != 0
&& strcmp(cfg->module_conf, "validator iterator") != 0
&& strcmp(cfg->module_conf, "dns64 validator iterator") != 0
&& strcmp(cfg->module_conf, "dns64 iterator") != 0
&& strcmp(cfg->module_conf, "respip iterator") != 0
&& strcmp(cfg->module_conf, "respip validator iterator") != 0
&& strcmp(cfg->module_conf, "respip dns64 validator iterator") != 0
&& strcmp(cfg->module_conf, "respip dns64 iterator") != 0
#ifdef WITH_PYTHONMODULE
&& strcmp(cfg->module_conf, "python iterator") != 0
&& strcmp(cfg->module_conf, "python respip iterator") != 0
&& strcmp(cfg->module_conf, "python validator iterator") != 0
&& strcmp(cfg->module_conf, "python respip validator iterator") != 0
&& strcmp(cfg->module_conf, "validator python iterator") != 0
&& strcmp(cfg->module_conf, "dns64 python iterator") != 0
&& strcmp(cfg->module_conf, "dns64 python validator iterator") != 0
&& strcmp(cfg->module_conf, "dns64 validator python iterator") != 0
&& strcmp(cfg->module_conf, "python dns64 iterator") != 0
&& strcmp(cfg->module_conf, "python dns64 validator iterator") != 0
#endif
#ifdef WITH_DYNLIBMODULE
&& strcmp(cfg->module_conf, "dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dynlib dynlib iterator") != 0
&& strcmp(cfg->module_conf, "python dynlib iterator") != 0
&& strcmp(cfg->module_conf, "python dynlib dynlib iterator") != 0
&& strcmp(cfg->module_conf, "python dynlib dynlib dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dynlib respip iterator") != 0
&& strcmp(cfg->module_conf, "dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dynlib dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "python dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "python dynlib dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "python dynlib dynlib dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib respip validator iterator") != 0
&& strcmp(cfg->module_conf, "validator dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dns64 dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dns64 dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "dns64 validator dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dns64 iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dns64 validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dns64 cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dynlib dns64 validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dns64 dynlib cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dns64 dynlib validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dynlib cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dynlib respip cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dynlib validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dynlib respip validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "cachedb dynlib iterator") != 0
&& strcmp(cfg->module_conf, "respip cachedb dynlib iterator") != 0
&& strcmp(cfg->module_conf, "validator cachedb dynlib iterator") != 0
&& strcmp(cfg->module_conf, "respip validator cachedb dynlib iterator") != 0
&& strcmp(cfg->module_conf, "validator dynlib cachedb iterator") != 0
&& strcmp(cfg->module_conf, "respip validator dynlib cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dynlib subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "dynlib respip subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache dynlib iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dynlib subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib respip subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache validator dynlib iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache validator dynlib iterator") != 0
&& strcmp(cfg->module_conf, "dynlib ipsecmod iterator") != 0
&& strcmp(cfg->module_conf, "dynlib ipsecmod respip iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod dynlib iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod dynlib respip iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib ipsecmod validator iterator") != 0
&& strcmp(cfg->module_conf, "dynlib ipsecmod respip validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod dynlib validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod dynlib respip validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod validator dynlib iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod respip validator dynlib iterator") != 0
#endif
#ifdef USE_CACHEDB
&& strcmp(cfg->module_conf, "validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "respip validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "cachedb iterator") != 0
&& strcmp(cfg->module_conf, "respip cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dns64 validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dns64 cachedb iterator") != 0
#endif
#if defined(WITH_PYTHONMODULE) && defined(USE_CACHEDB)
&& strcmp(cfg->module_conf, "python dns64 cachedb iterator") != 0
&& strcmp(cfg->module_conf, "python dns64 validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dns64 python cachedb iterator") != 0
&& strcmp(cfg->module_conf, "dns64 python validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "python cachedb iterator") != 0
&& strcmp(cfg->module_conf, "python respip cachedb iterator") != 0
&& strcmp(cfg->module_conf, "python validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "python respip validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "cachedb python iterator") != 0
&& strcmp(cfg->module_conf, "respip cachedb python iterator") != 0
&& strcmp(cfg->module_conf, "validator cachedb python iterator") != 0
&& strcmp(cfg->module_conf, "respip validator cachedb python iterator") != 0
&& strcmp(cfg->module_conf, "validator python cachedb iterator") != 0
&& strcmp(cfg->module_conf, "respip validator python cachedb iterator") != 0
#endif
#if defined(CLIENT_SUBNET) && defined(USE_CACHEDB)
&& strcmp(cfg->module_conf, "respip subnetcache validator cachedb iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache validator cachedb iterator") != 0
#endif
#ifdef CLIENT_SUBNET
&& strcmp(cfg->module_conf, "subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "dns64 subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "dns64 subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "dns64 subnetcache respip iterator") != 0
&& strcmp(cfg->module_conf, "dns64 subnetcache respip validator iterator") != 0
#endif
#if defined(WITH_PYTHONMODULE) && defined(CLIENT_SUBNET)
&& strcmp(cfg->module_conf, "python subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "python respip subnetcache iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache python iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache python iterator") != 0
&& strcmp(cfg->module_conf, "python subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "python respip subnetcache validator iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache python validator iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache python validator iterator") != 0
&& strcmp(cfg->module_conf, "subnetcache validator python iterator") != 0
&& strcmp(cfg->module_conf, "respip subnetcache validator python iterator") != 0
#endif
#ifdef USE_IPSECMOD
&& strcmp(cfg->module_conf, "ipsecmod iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod respip iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
#endif
#if defined(WITH_PYTHONMODULE) && defined(USE_IPSECMOD)
&& strcmp(cfg->module_conf, "python ipsecmod iterator") != 0
&& strcmp(cfg->module_conf, "python ipsecmod respip iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod python iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod python respip iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod respip validator iterator") != 0
&& strcmp(cfg->module_conf, "python ipsecmod validator iterator") != 0
&& strcmp(cfg->module_conf, "python ipsecmod respip validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod python validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod python respip validator iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod validator python iterator") != 0
&& strcmp(cfg->module_conf, "ipsecmod respip validator python iterator") != 0
#endif
#ifdef USE_IPSET
&& strcmp(cfg->module_conf, "validator ipset iterator") != 0
&& strcmp(cfg->module_conf, "validator ipset respip iterator") != 0
&& strcmp(cfg->module_conf, "ipset iterator") != 0
&& strcmp(cfg->module_conf, "ipset respip iterator") != 0
#endif
) {
fatal_exit("module conf '%s' is not known to work",
cfg->module_conf);
}
#ifdef HAVE_GETPWNAM
if(cfg->username && cfg->username[0]) {
if(getpwnam(cfg->username) == NULL)
fatal_exit("user '%s' does not exist.", cfg->username);
# ifdef HAVE_ENDPWENT
endpwent();
# endif
}
#endif
if(cfg->remote_control_enable && options_remote_is_address(cfg)
&& cfg->control_use_cert) {
check_chroot_string("server-key-file", &cfg->server_key_file,
cfg->chrootdir, cfg);
check_chroot_string("server-cert-file", &cfg->server_cert_file,
cfg->chrootdir, cfg);
if(!is_file(cfg->control_key_file))
fatal_exit("control-key-file: \"%s\" does not exist",
cfg->control_key_file);
if(!is_file(cfg->control_cert_file))
fatal_exit("control-cert-file: \"%s\" does not exist",
cfg->control_cert_file);
}
donotquerylocalhostcheck(cfg);
localzonechecks(cfg);
view_and_respipchecks(cfg);
#ifdef CLIENT_SUBNET
ecs_conf_checks(cfg);
#endif
}
/** check forwards */
static void
check_fwd(struct config_file* cfg)
{
struct iter_forwards* fwd = forwards_create();
if(!fwd || !forwards_apply_cfg(fwd, cfg)) {
fatal_exit("Could not set forward zones");
}
forwards_delete(fwd);
}
/** check hints */
static void
check_hints(struct config_file* cfg)
{
struct iter_hints* hints = hints_create();
if(!hints || !hints_apply_cfg(hints, cfg)) {
fatal_exit("Could not set root or stub hints");
}
hints_delete(hints);
}
/** check auth zones */
static void
check_auth(struct config_file* cfg)
{
int is_rpz = 0;
struct auth_zones* az = auth_zones_create();
if(!az || !auth_zones_apply_cfg(az, cfg, 0, &is_rpz, NULL, NULL)) {
fatal_exit("Could not setup authority zones");
}
auth_zones_delete(az);
}
/** check config file */
static void
checkconf(const char* cfgfile, const char* opt, int final, int quiet)
{
char oldwd[4096];
struct config_file* cfg = config_create();
if(!cfg)
fatal_exit("out of memory");
oldwd[0] = 0;
if(!getcwd(oldwd, sizeof(oldwd))) {
log_err("cannot getcwd: %s", strerror(errno));
oldwd[0] = 0;
}
if(!config_read(cfg, cfgfile, NULL)) {
/* config_read prints messages to stderr */
config_delete(cfg);
exit(1);
}
if(oldwd[0] && chdir(oldwd) == -1)
log_err("cannot chdir(%s): %s", oldwd, strerror(errno));
if(opt) {
print_option(cfg, opt, final);
config_delete(cfg);
return;
}
morechecks(cfg);
check_mod(cfg, iter_get_funcblock());
check_mod(cfg, val_get_funcblock());
#ifdef WITH_PYTHONMODULE
if(strstr(cfg->module_conf, "python"))
check_mod(cfg, pythonmod_get_funcblock());
#endif
check_fwd(cfg);
check_hints(cfg);
check_auth(cfg);
if(!quiet) { printf("unbound-checkconf: no errors in %s\n", cfgfile); }
config_delete(cfg);
}
/** 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 checkconf */
int main(int argc, char* argv[])
{
int c;
int final = 0;
int quiet = 0;
const char* f;
const char* opt = NULL;
const char* cfgfile = CONFIGFILE;
checklock_start();
log_ident_set("unbound-checkconf");
log_init(NULL, 0, NULL);
#ifdef USE_WINSOCK
/* use registry config file in preference to compiletime location */
if(!(cfgfile=w_lookup_reg_str("Software\\Unbound", "ConfigFile")))
cfgfile = CONFIGFILE;
#endif /* USE_WINSOCK */
/* parse the options */
while( (c=getopt(argc, argv, "fhqo:")) != -1) {
switch(c) {
case 'f':
final = 1;
break;
case 'o':
opt = optarg;
break;
case 'q':
quiet = 1;
break;
case '?':
case 'h':
default:
usage();
}
}
argc -= optind;
argv += optind;
if(argc != 0 && argc != 1)
usage();
if(argc == 1)
f = argv[0];
else f = cfgfile;
checkconf(f, opt, final, quiet);
checklock_stop();
return 0;
}
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