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options.c
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/*
* options.c -- options functions.
*
* Copyright (c) 2001-2006, NLnet Labs. All rights reserved.
*
* See LICENSE for the license.
*
*/
#include "config.h"
#include <string.h>
#include <stdio.h>
#include <sys/stat.h>
#include <errno.h>
#ifdef HAVE_IFADDRS_H
#include <ifaddrs.h>
#endif
#include "options.h"
#include "query.h"
#include "tsig.h"
#include "ixfr.h"
#include "difffile.h"
#include "rrl.h"
#include "bitset.h"
#include "configparser.h"
config_parser_state_type* cfg_parser = 0;
extern FILE* c_in, *c_out;
int c_parse(void);
int c_lex(void);
int c_wrap(void);
int c_lex_destroy(void);
extern char* c_text;
static int
rbtree_strcmp(const void* p1, const void* p2)
{
if(p1 == NULL && p2 == NULL) return 0;
if(p1 == NULL) return -1;
if(p2 == NULL) return 1;
return strcmp((const char*)p1, (const char*)p2);
}
struct nsd_options*
nsd_options_create(region_type* region)
{
struct nsd_options* opt;
opt = (struct nsd_options*)region_alloc(region, sizeof(
struct nsd_options));
opt->region = region;
opt->zone_options = rbtree_create(region,
(int (*)(const void *, const void *)) dname_compare);
opt->configfile = NULL;
opt->zonestatnames = rbtree_create(opt->region, rbtree_strcmp);
opt->patterns = rbtree_create(region, rbtree_strcmp);
opt->keys = rbtree_create(region, rbtree_strcmp);
opt->tls_auths = rbtree_create(region, rbtree_strcmp);
opt->ip_addresses = NULL;
opt->ip_transparent = 0;
opt->ip_freebind = 0;
opt->send_buffer_size = 0;
opt->receive_buffer_size = 0;
opt->debug_mode = 0;
opt->verbosity = 0;
opt->hide_version = 0;
opt->hide_identity = 0;
opt->drop_updates = 0;
opt->do_ip4 = 1;
opt->do_ip6 = 1;
opt->identity = 0;
opt->version = 0;
opt->nsid = 0;
opt->logfile = 0;
opt->log_only_syslog = 0;
opt->log_time_ascii = 1;
opt->round_robin = 0; /* also packet.h::round_robin */
opt->minimal_responses = 0; /* also packet.h::minimal_responses */
opt->confine_to_zone = 0;
opt->refuse_any = 0;
opt->server_count = 1;
opt->cpu_affinity = NULL;
opt->service_cpu_affinity = NULL;
opt->tcp_count = 100;
opt->tcp_reject_overflow = 0;
opt->tcp_query_count = 0;
opt->tcp_timeout = TCP_TIMEOUT;
opt->tcp_mss = 0;
opt->outgoing_tcp_mss = 0;
opt->ipv4_edns_size = EDNS_MAX_MESSAGE_LEN;
opt->ipv6_edns_size = EDNS_MAX_MESSAGE_LEN;
opt->pidfile = PIDFILE;
opt->port = UDP_PORT;
/* deprecated? opt->port = TCP_PORT; */
opt->reuseport = 0;
opt->xfrd_tcp_max = 128;
opt->xfrd_tcp_pipeline = 128;
opt->statistics = 0;
opt->chroot = 0;
opt->username = USER;
opt->zonesdir = ZONESDIR;
opt->xfrdfile = XFRDFILE;
opt->xfrdir = XFRDIR;
opt->zonelistfile = ZONELISTFILE;
#ifdef RATELIMIT
opt->rrl_size = RRL_BUCKETS;
opt->rrl_slip = RRL_SLIP;
opt->rrl_ipv4_prefix_length = RRL_IPV4_PREFIX_LENGTH;
opt->rrl_ipv6_prefix_length = RRL_IPV6_PREFIX_LENGTH;
# ifdef RATELIMIT_DEFAULT_OFF
opt->rrl_ratelimit = 0;
opt->rrl_whitelist_ratelimit = 0;
# else
opt->rrl_ratelimit = RRL_LIMIT/2;
opt->rrl_whitelist_ratelimit = RRL_WLIST_LIMIT/2;
# endif
#endif
#ifdef USE_DNSTAP
opt->dnstap_enable = 0;
opt->dnstap_socket_path = DNSTAP_SOCKET_PATH;
opt->dnstap_ip = "";
opt->dnstap_tls = 1;
opt->dnstap_tls_server_name = NULL;
opt->dnstap_tls_cert_bundle = NULL;
opt->dnstap_tls_client_key_file = NULL;
opt->dnstap_tls_client_cert_file = NULL;
opt->dnstap_send_identity = 0;
opt->dnstap_send_version = 0;
opt->dnstap_identity = NULL;
opt->dnstap_version = NULL;
opt->dnstap_log_auth_query_messages = 0;
opt->dnstap_log_auth_response_messages = 0;
#endif
opt->zonefiles_check = 1;
opt->zonefiles_write = ZONEFILES_WRITE_INTERVAL;
opt->xfrd_reload_timeout = 1;
opt->tls_service_key = NULL;
opt->tls_service_ocsp = NULL;
opt->tls_service_pem = NULL;
opt->tls_port = TLS_PORT;
opt->tls_cert_bundle = NULL;
opt->proxy_protocol_port = NULL;
opt->answer_cookie = 0;
opt->cookie_secret = NULL;
opt->cookie_secret_file = CONFIGDIR"/nsd_cookiesecrets.txt";
opt->control_enable = 0;
opt->control_interface = NULL;
opt->control_port = NSD_CONTROL_PORT;
opt->server_key_file = CONFIGDIR"/nsd_server.key";
opt->server_cert_file = CONFIGDIR"/nsd_server.pem";
opt->control_key_file = CONFIGDIR"/nsd_control.key";
opt->control_cert_file = CONFIGDIR"/nsd_control.pem";
opt->verify_enable = 0;
opt->verify_ip_addresses = NULL;
opt->verify_port = VERIFY_PORT;
opt->verify_zones = 1;
opt->verifier = NULL;
opt->verifier_count = 1;
opt->verifier_feed_zone = 1;
opt->verifier_timeout = 0;
return opt;
}
int
nsd_options_insert_zone(struct nsd_options* opt, struct zone_options* zone)
{
/* create dname for lookup */
const dname_type* dname = dname_parse(opt->region, zone->name);
if(!dname)
return 0;
zone->node.key = dname;
if(!rbtree_insert(opt->zone_options, (rbnode_type*)zone))
return 0;
return 1;
}
int
nsd_options_insert_pattern(struct nsd_options* opt,
struct pattern_options* pat)
{
if(!pat->pname)
return 0;
pat->node.key = pat->pname;
if(!rbtree_insert(opt->patterns, (rbnode_type*)pat))
return 0;
return 1;
}
void
warn_if_directory(const char* filetype, FILE* f, const char* fname)
{
if(fileno(f) != -1) {
struct stat st;
memset(&st, 0, sizeof(st));
if(fstat(fileno(f), &st) != -1) {
if(S_ISDIR(st.st_mode)) {
log_msg(LOG_WARNING, "trying to read %s but it is a directory: %s", filetype, fname);
}
}
}
}
int
parse_options_file(struct nsd_options* opt, const char* file,
void (*err)(void*,const char*), void* err_arg)
{
FILE *in = 0;
struct pattern_options* pat;
struct acl_options* acl;
if(!cfg_parser) {
cfg_parser = (config_parser_state_type*)region_alloc(
opt->region, sizeof(config_parser_state_type));
cfg_parser->chroot = 0;
}
cfg_parser->err = err;
cfg_parser->err_arg = err_arg;
cfg_parser->filename = (char*)file;
cfg_parser->line = 1;
cfg_parser->errors = 0;
cfg_parser->opt = opt;
cfg_parser->pattern = NULL;
cfg_parser->zone = NULL;
cfg_parser->key = NULL;
cfg_parser->tls_auth = NULL;
in = fopen(cfg_parser->filename, "r");
if(!in) {
if(err) {
char m[MAXSYSLOGMSGLEN];
snprintf(m, sizeof(m), "Could not open %s: %s\n",
file, strerror(errno));
err(err_arg, m);
} else {
fprintf(stderr, "Could not open %s: %s\n",
file, strerror(errno));
}
return 0;
}
warn_if_directory("configfile", in, file);
c_in = in;
c_parse();
fclose(in);
opt->configfile = region_strdup(opt->region, file);
RBTREE_FOR(pat, struct pattern_options*, opt->patterns)
{
/* lookup keys for acls */
for(acl=pat->allow_notify; acl; acl=acl->next)
{
if(acl->nokey || acl->blocked)
continue;
acl->key_options = key_options_find(opt, acl->key_name);
if(!acl->key_options)
c_error("key %s in pattern %s could not be found",
acl->key_name, pat->pname);
}
for(acl=pat->notify; acl; acl=acl->next)
{
if(acl->nokey || acl->blocked)
continue;
acl->key_options = key_options_find(opt, acl->key_name);
if(!acl->key_options)
c_error("key %s in pattern %s could not be found",
acl->key_name, pat->pname);
}
for(acl=pat->request_xfr; acl; acl=acl->next)
{
/* Find tls_auth */
if (!acl->tls_auth_name)
; /* pass */
else if (!(acl->tls_auth_options =
tls_auth_options_find(opt, acl->tls_auth_name)))
c_error("tls_auth %s in pattern %s could not be found",
acl->tls_auth_name, pat->pname);
/* Find key */
if(acl->nokey || acl->blocked)
continue;
acl->key_options = key_options_find(opt, acl->key_name);
if(!acl->key_options)
c_error("key %s in pattern %s could not be found",
acl->key_name, pat->pname);
}
for(acl=pat->provide_xfr; acl; acl=acl->next)
{
if(acl->nokey || acl->blocked)
continue;
acl->key_options = key_options_find(opt, acl->key_name);
if(!acl->key_options)
c_error("key %s in pattern %s could not be found",
acl->key_name, pat->pname);
}
for(acl=pat->allow_query; acl; acl=acl->next)
{
if(acl->nokey || acl->blocked)
continue;
acl->key_options = key_options_find(opt, acl->key_name);
if(!acl->key_options)
c_error("key %s in pattern %s could not be found",
acl->key_name, pat->pname);
}
}
if(cfg_parser->errors > 0)
{
if(err) {
char m[MAXSYSLOGMSGLEN];
snprintf(m, sizeof(m), "read %s failed: %d errors in "
"configuration file\n", file,
cfg_parser->errors);
err(err_arg, m);
} else {
fprintf(stderr, "read %s failed: %d errors in "
"configuration file\n", file,
cfg_parser->errors);
}
return 0;
}
return 1;
}
void options_zonestatnames_create(struct nsd_options* opt)
{
struct zone_options* zopt;
/* allocate "" as zonestat 0, for zones without a zonestat */
if(!rbtree_search(opt->zonestatnames, "")) {
struct zonestatname* n;
n = (struct zonestatname*)region_alloc_zero(opt->region,
sizeof(*n));
n->node.key = region_strdup(opt->region, "");
if(!n->node.key) {
log_msg(LOG_ERR, "malloc failed: %s", strerror(errno));
exit(1);
}
n->id = (unsigned)(opt->zonestatnames->count);
rbtree_insert(opt->zonestatnames, (rbnode_type*)n);
}
RBTREE_FOR(zopt, struct zone_options*, opt->zone_options) {
/* insert into tree, so that when read in later id exists */
(void)getzonestatid(opt, zopt);
}
}
#define ZONELIST_HEADER "# NSD zone list\n# name pattern\n"
static int
comp_zonebucket(const void* a, const void* b)
{
/* the line size is much smaller than max-int, and positive,
* so the subtraction works */
return *(const int*)b - *(const int*)a;
}
/* insert free entry into zonelist free buckets */
static void
zone_list_free_insert(struct nsd_options* opt, int linesize, off_t off)
{
struct zonelist_free* e;
struct zonelist_bucket* b = (struct zonelist_bucket*)rbtree_search(
opt->zonefree, &linesize);
if(!b) {
b = region_alloc_zero(opt->region, sizeof(*b));
b->linesize = linesize;
b->node = *RBTREE_NULL;
b->node.key = &b->linesize;
rbtree_insert(opt->zonefree, &b->node);
}
e = (struct zonelist_free*)region_alloc_zero(opt->region, sizeof(*e));
e->next = b->list;
b->list = e;
e->off = off;
opt->zonefree_number++;
}
struct zone_options*
zone_list_zone_insert(struct nsd_options* opt, const char* nm,
const char* patnm, int linesize, off_t off)
{
struct pattern_options* pat = pattern_options_find(opt, patnm);
struct zone_options* zone;
if(!pat) {
log_msg(LOG_ERR, "pattern does not exist for zone %s "
"pattern %s", nm, patnm);
return NULL;
}
zone = zone_options_create(opt->region);
zone->part_of_config = 0;
zone->name = region_strdup(opt->region, nm);
zone->linesize = linesize;
zone->off = off;
zone->pattern = pat;
if(!nsd_options_insert_zone(opt, zone)) {
log_msg(LOG_ERR, "bad domain name or duplicate zone '%s' "
"pattern %s", nm, patnm);
region_recycle(opt->region, (void*)zone->name, strlen(nm)+1);
region_recycle(opt->region, zone, sizeof(*zone));
return NULL;
}
return zone;
}
int
parse_zone_list_file(struct nsd_options* opt)
{
/* zonelist looks like this:
# name pattern
add example.com master
del example.net slave
add foo.bar.nl slave
add rutabaga.uk config
*/
char hdr[64];
char buf[1024];
/* create empty data structures */
opt->zonefree = rbtree_create(opt->region, comp_zonebucket);
opt->zonelist = NULL;
opt->zonefree_number = 0;
opt->zonelist_off = 0;
/* try to open the zonelist file, an empty or nonexist file is OK */
opt->zonelist = fopen(opt->zonelistfile, "r+");
if(!opt->zonelist) {
if(errno == ENOENT)
return 1; /* file does not exist, it is created later */
log_msg(LOG_ERR, "could not open zone list %s: %s", opt->zonelistfile,
strerror(errno));
return 0;
}
/* read header */
hdr[strlen(ZONELIST_HEADER)] = 0;
if(fread(hdr, 1, strlen(ZONELIST_HEADER), opt->zonelist) !=
strlen(ZONELIST_HEADER) || strncmp(hdr, ZONELIST_HEADER,
strlen(ZONELIST_HEADER)) != 0) {
log_msg(LOG_ERR, "zone list %s contains bad header\n", opt->zonelistfile);
fclose(opt->zonelist);
opt->zonelist = NULL;
return 0;
}
buf[sizeof(buf)-1]=0;
/* read entries in file */
while(fgets(buf, sizeof(buf), opt->zonelist)) {
/* skip comments and empty lines */
if(buf[0] == 0 || buf[0] == '\n' || buf[0] == '#')
continue;
if(strncmp(buf, "add ", 4) == 0) {
int linesize = strlen(buf);
/* parse the 'add' line */
/* pick last space on the line, so that the domain
* name can have a space in it (but not the pattern)*/
char* space = strrchr(buf+4, ' ');
char* nm, *patnm;
if(!space) {
/* parse error */
log_msg(LOG_ERR, "parse error in %s: '%s'",
opt->zonelistfile, buf);
continue;
}
nm = buf+4;
*space = 0;
patnm = space+1;
if(linesize && buf[linesize-1] == '\n')
buf[linesize-1] = 0;
/* store offset and line size for zone entry */
/* and create zone entry in zonetree */
(void)zone_list_zone_insert(opt, nm, patnm, linesize,
ftello(opt->zonelist)-linesize);
} else if(strncmp(buf, "del ", 4) == 0) {
/* store offset and line size for deleted entry */
int linesize = strlen(buf);
zone_list_free_insert(opt, linesize,
ftello(opt->zonelist)-linesize);
} else {
log_msg(LOG_WARNING, "bad data in %s, '%s'", opt->zonelistfile,
buf);
}
}
/* store EOF offset */
opt->zonelist_off = ftello(opt->zonelist);
return 1;
}
void
zone_options_delete(struct nsd_options* opt, struct zone_options* zone)
{
rbtree_delete(opt->zone_options, zone->node.key);
region_recycle(opt->region, (void*)zone->node.key, dname_total_size(
(dname_type*)zone->node.key));
region_recycle(opt->region, zone, sizeof(*zone));
}
/* add a new zone to the zonelist */
struct zone_options*
zone_list_add(struct nsd_options* opt, const char* zname, const char* pname)
{
int r;
struct zonelist_free* e;
struct zonelist_bucket* b;
int linesize = 6 + strlen(zname) + strlen(pname);
/* create zone entry */
struct zone_options* zone = zone_list_zone_insert(opt, zname, pname,
linesize, 0);
if(!zone)
return NULL;
/* use free entry or append to file or create new file */
if(!opt->zonelist || opt->zonelist_off == 0) {
/* create new file */
if(opt->zonelist) fclose(opt->zonelist);
opt->zonelist = fopen(opt->zonelistfile, "w+");
if(!opt->zonelist) {
log_msg(LOG_ERR, "could not create zone list %s: %s",
opt->zonelistfile, strerror(errno));
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
r = fprintf(opt->zonelist, ZONELIST_HEADER);
if(r != strlen(ZONELIST_HEADER)) {
if(r == -1)
log_msg(LOG_ERR, "could not write to %s: %s",
opt->zonelistfile, strerror(errno));
else log_msg(LOG_ERR, "partial write to %s: disk full",
opt->zonelistfile);
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
zone->off = ftello(opt->zonelist);
if(zone->off == -1)
log_msg(LOG_ERR, "ftello(%s): %s", opt->zonelistfile, strerror(errno));
r = fprintf(opt->zonelist, "add %s %s\n", zname, pname);
if(r != zone->linesize) {
if(r == -1)
log_msg(LOG_ERR, "could not write to %s: %s",
opt->zonelistfile, strerror(errno));
else log_msg(LOG_ERR, "partial write to %s: disk full",
opt->zonelistfile);
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
opt->zonelist_off = ftello(opt->zonelist);
if(opt->zonelist_off == -1)
log_msg(LOG_ERR, "ftello(%s): %s", opt->zonelistfile, strerror(errno));
if(fflush(opt->zonelist) != 0) {
log_msg(LOG_ERR, "fflush %s: %s", opt->zonelistfile, strerror(errno));
}
return zone;
}
b = (struct zonelist_bucket*)rbtree_search(opt->zonefree,
&zone->linesize);
if(!b || b->list == NULL) {
/* no empty place, append to file */
zone->off = opt->zonelist_off;
if(fseeko(opt->zonelist, zone->off, SEEK_SET) == -1) {
log_msg(LOG_ERR, "fseeko(%s): %s", opt->zonelistfile, strerror(errno));
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
r = fprintf(opt->zonelist, "add %s %s\n", zname, pname);
if(r != zone->linesize) {
if(r == -1)
log_msg(LOG_ERR, "could not write to %s: %s",
opt->zonelistfile, strerror(errno));
else log_msg(LOG_ERR, "partial write to %s: disk full",
opt->zonelistfile);
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
opt->zonelist_off += linesize;
if(fflush(opt->zonelist) != 0) {
log_msg(LOG_ERR, "fflush %s: %s", opt->zonelistfile, strerror(errno));
}
return zone;
}
/* reuse empty spot */
e = b->list;
zone->off = e->off;
if(fseeko(opt->zonelist, zone->off, SEEK_SET) == -1) {
log_msg(LOG_ERR, "fseeko(%s): %s", opt->zonelistfile, strerror(errno));
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
r = fprintf(opt->zonelist, "add %s %s\n", zname, pname);
if(r != zone->linesize) {
if(r == -1)
log_msg(LOG_ERR, "could not write to %s: %s",
opt->zonelistfile, strerror(errno));
else log_msg(LOG_ERR, "partial write to %s: disk full",
opt->zonelistfile);
log_msg(LOG_ERR, "zone %s could not be added", zname);
zone_options_delete(opt, zone);
return NULL;
}
if(fflush(opt->zonelist) != 0) {
log_msg(LOG_ERR, "fflush %s: %s", opt->zonelistfile, strerror(errno));
}
/* snip off and recycle element */
b->list = e->next;
region_recycle(opt->region, e, sizeof(*e));
if(b->list == NULL) {
rbtree_delete(opt->zonefree, &b->linesize);
region_recycle(opt->region, b, sizeof(*b));
}
opt->zonefree_number--;
return zone;
}
/* remove a zone on the zonelist */
void
zone_list_del(struct nsd_options* opt, struct zone_options* zone)
{
/* put its space onto the free entry */
if(fseeko(opt->zonelist, zone->off, SEEK_SET) == -1) {
log_msg(LOG_ERR, "fseeko(%s): %s", opt->zonelistfile, strerror(errno));
return;
}
fprintf(opt->zonelist, "del");
zone_list_free_insert(opt, zone->linesize, zone->off);
/* remove zone_options */
zone_options_delete(opt, zone);
/* see if we need to compact: it is going to halve the zonelist */
if(opt->zonefree_number > opt->zone_options->count) {
zone_list_compact(opt);
} else {
if(fflush(opt->zonelist) != 0) {
log_msg(LOG_ERR, "fflush %s: %s", opt->zonelistfile, strerror(errno));
}
}
}
/* postorder delete of zonelist free space tree */
static void
delbucket(region_type* region, struct zonelist_bucket* b)
{
struct zonelist_free* e, *f;
if(!b || (rbnode_type*)b==RBTREE_NULL)
return;
delbucket(region, (struct zonelist_bucket*)b->node.left);
delbucket(region, (struct zonelist_bucket*)b->node.right);
e = b->list;
while(e) {
f = e->next;
region_recycle(region, e, sizeof(*e));
e = f;
}
region_recycle(region, b, sizeof(*b));
}
/* compact zonelist file */
void
zone_list_compact(struct nsd_options* opt)
{
char outname[1024];
FILE* out;
struct zone_options* zone;
off_t off;
int r;
snprintf(outname, sizeof(outname), "%s~", opt->zonelistfile);
/* useful, when : count-of-free > count-of-used */
/* write zonelist to zonelist~ */
out = fopen(outname, "w+");
if(!out) {
log_msg(LOG_ERR, "could not open %s: %s", outname, strerror(errno));
return;
}
r = fprintf(out, ZONELIST_HEADER);
if(r == -1) {
log_msg(LOG_ERR, "write %s failed: %s", outname,
strerror(errno));
fclose(out);
return;
} else if(r != strlen(ZONELIST_HEADER)) {
log_msg(LOG_ERR, "write %s was partial: disk full",
outname);
fclose(out);
return;
}
off = ftello(out);
if(off == -1) {
log_msg(LOG_ERR, "ftello(%s): %s", outname, strerror(errno));
fclose(out);
return;
}
RBTREE_FOR(zone, struct zone_options*, opt->zone_options) {
if(zone->part_of_config)
continue;
r = fprintf(out, "add %s %s\n", zone->name,
zone->pattern->pname);
if(r < 0) {
log_msg(LOG_ERR, "write %s failed: %s", outname,
strerror(errno));
fclose(out);
return;
} else if(r != zone->linesize) {
log_msg(LOG_ERR, "write %s was partial: disk full",
outname);
fclose(out);
return;
}
}
if(fflush(out) != 0) {
log_msg(LOG_ERR, "fflush %s: %s", outname, strerror(errno));
}
/* rename zonelist~ onto zonelist */
if(rename(outname, opt->zonelistfile) == -1) {
log_msg(LOG_ERR, "rename(%s to %s) failed: %s",
outname, opt->zonelistfile, strerror(errno));
fclose(out);
return;
}
fclose(opt->zonelist);
/* set offsets */
RBTREE_FOR(zone, struct zone_options*, opt->zone_options) {
if(zone->part_of_config)
continue;
zone->off = off;
off += zone->linesize;
}
/* empty the free tree */
delbucket(opt->region, (struct zonelist_bucket*)opt->zonefree->root);
opt->zonefree->root = RBTREE_NULL;
opt->zonefree->count = 0;
opt->zonefree_number = 0;
/* finish */
opt->zonelist = out;
opt->zonelist_off = off;
}
/* close zonelist file */
void
zone_list_close(struct nsd_options* opt)
{
if(opt->zonelist) {
fclose(opt->zonelist);
opt->zonelist = NULL;
}
}
static void
c_error_va_list_pos(int showpos, const char* fmt, va_list args)
{
char* at = NULL;
cfg_parser->errors++;
if(showpos && c_text && c_text[0]!=0) {
at = c_text;
}
if(cfg_parser->err) {
char m[MAXSYSLOGMSGLEN];
snprintf(m, sizeof(m), "%s:%d: ", cfg_parser->filename,
cfg_parser->line);
(*cfg_parser->err)(cfg_parser->err_arg, m);
if(at) {
snprintf(m, sizeof(m), "at '%s': ", at);
(*cfg_parser->err)(cfg_parser->err_arg, m);
}
(*cfg_parser->err)(cfg_parser->err_arg, "error: ");
vsnprintf(m, sizeof(m), fmt, args);
(*cfg_parser->err)(cfg_parser->err_arg, m);
(*cfg_parser->err)(cfg_parser->err_arg, "\n");
return;
}
fprintf(stderr, "%s:%d: ", cfg_parser->filename, cfg_parser->line);
if(at) fprintf(stderr, "at '%s': ", at);
fprintf(stderr, "error: ");
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
}
void
c_error(const char *fmt, ...)
{
va_list ap;
int showpos = 0;
if (strcmp(fmt, "syntax error") == 0 || strcmp(fmt, "parse error") == 0) {
showpos = 1;
}
va_start(ap, fmt);
c_error_va_list_pos(showpos, fmt, ap);
va_end(ap);
}
int
c_wrap(void)
{
return 1;
}
struct zone_options*
zone_options_create(region_type* region)
{
struct zone_options* zone;
zone = (struct zone_options*)region_alloc(region, sizeof(
struct zone_options));
zone->node = *RBTREE_NULL;
zone->name = 0;
zone->pattern = 0;
zone->part_of_config = 0;
return zone;
}
/* true is booleans are the same truth value */
#define booleq(x,y) ( ((x) && (y)) || (!(x) && !(y)) )
/* true is min_expire_time_expr has either an equal known value
* or none of these known values but booleanally equal
*/
#define expire_expr_eq(x,y) ( ( (x) == REFRESHPLUSRETRYPLUS1 \
&& (y) == REFRESHPLUSRETRYPLUS1 ) \
|| ( (x) != REFRESHPLUSRETRYPLUS1 \
&& (y) != REFRESHPLUSRETRYPLUS1 \
&& booleq((x), (y))))
int
acl_equal(struct acl_options* p, struct acl_options* q)
{
if(!booleq(p->use_axfr_only, q->use_axfr_only)) return 0;
if(!booleq(p->allow_udp, q->allow_udp)) return 0;
if(strcmp(p->ip_address_spec, q->ip_address_spec)!=0) return 0;
/* the ip6, port, addr, mask, type: are derived from the ip_address_spec */
if(!booleq(p->nokey, q->nokey)) return 0;
if(!booleq(p->blocked, q->blocked)) return 0;
if(p->key_name && q->key_name) {
if(strcmp(p->key_name, q->key_name)!=0) return 0;
} else if(p->key_name && !q->key_name) return 0;
else if(!p->key_name && q->key_name) return 0;
/* key_options is derived from key_name */
if(p->tls_auth_name && q->tls_auth_name) {
if(strcmp(p->tls_auth_name, q->tls_auth_name)!=0) return 0;
} else if(p->tls_auth_name && !q->tls_auth_name) return 0;
else if(!p->tls_auth_name && q->tls_auth_name) return 0;
/* tls_auth_options is derived from tls_auth_name */
return 1;
}
int
acl_list_equal(struct acl_options* p, struct acl_options* q)
{
/* must be same and in same order */
while(p && q) {
if(!acl_equal(p, q))
return 0;
p = p->next;
q = q->next;
}
if(!p && !q) return 1;
/* different lengths */
return 0;
}
struct pattern_options*
pattern_options_create(region_type* region)
{
struct pattern_options* p;
p = (struct pattern_options*)region_alloc(region, sizeof(
struct pattern_options));
p->node = *RBTREE_NULL;
p->pname = 0;
p->zonefile = 0;
p->zonestats = 0;
p->allow_notify = 0;
p->request_xfr = 0;
p->size_limit_xfr = 0;
p->notify = 0;
p->provide_xfr = 0;
p->allow_query = 0;
p->outgoing_interface = 0;
p->notify_retry = 5;
p->notify_retry_is_default = 1;
p->allow_axfr_fallback = 1;
p->allow_axfr_fallback_is_default = 1;
p->implicit = 0;
p->xfrd_flags = 0;
p->max_refresh_time = 2419200; /* 4 weeks */
p->max_refresh_time_is_default = 1;
p->min_refresh_time = 0;
p->min_refresh_time_is_default = 1;
p->max_retry_time = 1209600; /* 2 weeks */
p->max_retry_time_is_default = 1;
p->min_retry_time = 0;
p->min_retry_time_is_default = 1;
p->min_expire_time = 0;
p->min_expire_time_expr = EXPIRE_TIME_IS_DEFAULT;
#ifdef RATELIMIT
p->rrl_whitelist = 0;
#endif
p->multi_primary_check = 0;
p->store_ixfr = 0;
p->store_ixfr_is_default = 1;
p->ixfr_size = IXFR_SIZE_DEFAULT;
p->ixfr_size_is_default = 1;
p->ixfr_number = IXFR_NUMBER_DEFAULT;
p->ixfr_number_is_default = 1;
p->create_ixfr = 0;
p->create_ixfr_is_default = 1;
p->verify_zone = VERIFY_ZONE_INHERIT;
p->verify_zone_is_default = 1;
p->verifier = NULL;
p->verifier_feed_zone = VERIFIER_FEED_ZONE_INHERIT;
p->verifier_feed_zone_is_default = 1;
p->verifier_timeout = VERIFIER_TIMEOUT_INHERIT;
p->verifier_timeout_is_default = 1;
return p;
}
static void
acl_delete(region_type* region, struct acl_options* acl)
{
if(acl->ip_address_spec)
region_recycle(region, (void*)acl->ip_address_spec,
strlen(acl->ip_address_spec)+1);
if(acl->key_name)
region_recycle(region, (void*)acl->key_name,
strlen(acl->key_name)+1);
if(acl->tls_auth_name)
region_recycle(region, (void*)acl->tls_auth_name,
strlen(acl->tls_auth_name)+1);
/* key_options is a convenience pointer, not owned by the acl */
region_recycle(region, acl, sizeof(*acl));
}
static void
acl_list_delete(region_type* region, struct acl_options* list)
{
struct acl_options* n;
while(list) {
n = list->next;
acl_delete(region, list);
list = n;
}
}
static void
verifier_delete(region_type* region, char **v)
{
if(v != NULL) {
size_t vc = 0;
for(vc = 0; v[vc] != NULL; vc++)
region_recycle(region, v[vc], strlen(v[vc]) + 1);
region_recycle(region, v, (vc + 1) * sizeof(char *));
}
}
void
pattern_options_remove(struct nsd_options* opt, const char* name)
{
struct pattern_options* p = (struct pattern_options*)rbtree_delete(
opt->patterns, name);
/* delete p and its contents */
if (!p)
return;
if(p->pname)
region_recycle(opt->region, (void*)p->pname,
strlen(p->pname)+1);
if(p->zonefile)
region_recycle(opt->region, (void*)p->zonefile,
strlen(p->zonefile)+1);
if(p->zonestats)
region_recycle(opt->region, (void*)p->zonestats,
strlen(p->zonestats)+1);
acl_list_delete(opt->region, p->allow_notify);
acl_list_delete(opt->region, p->request_xfr);
acl_list_delete(opt->region, p->notify);
acl_list_delete(opt->region, p->provide_xfr);
acl_list_delete(opt->region, p->allow_query);
acl_list_delete(opt->region, p->outgoing_interface);
verifier_delete(opt->region, p->verifier);
region_recycle(opt->region, p, sizeof(struct pattern_options));
}
static struct acl_options*
copy_acl(region_type* region, struct acl_options* a)
{
struct acl_options* b;
if(!a) return NULL;
b = (struct acl_options*)region_alloc(region, sizeof(*b));
/* copy the whole lot */
*b = *a;
/* fix the pointers */
if(a->ip_address_spec)
b->ip_address_spec = region_strdup(region, a->ip_address_spec);
if(a->key_name)
b->key_name = region_strdup(region, a->key_name);
if(a->tls_auth_name)
b->tls_auth_name = region_strdup(region, a->tls_auth_name);
b->next = NULL;