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ldap2dns.c
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ldap2dns.c
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/*
* Create data from an LDAP directory service to be used for tinydns
* $Id$
* Copyright 2005-2010 by Alkaloid Networks, LLC
* Copyright 2000-2005 by Jacob Rief <[email protected]>
* License: GPL version 2. See http://www.fsf.org for details
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA.
*/
#include <lber.h>
#include <ldap.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <getopt.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <arpa/inet.h>
#define UPDATE_INTERVAL 59
#define LDAP_CONF "/etc/ldap.conf"
#define OUTPUT_DATA 1
#define OUTPUT_DB 2
#define MAXHOSTS 10
#define DEF_SEARCHTIMEOUT 40
#define DEF_RECLIMIT LDAP_NO_LIMIT
#define MAX_DOMAIN_LEN 256
static char tinydns_textfile[256];
static char tinydns_texttemp[256];
static LDAP* ldap_con;
static FILE* namedmaster;
static FILE* namedzone;
static FILE* tinyfile;
static FILE* ldifout;
static time_t time_now;
static char* const* main_argv;
static int main_argc;
static void print_version(void)
{
printf("\n");
printf("ldap2dns version %s\n", VERSION);
printf("\n");
printf(" Copyright 2005-2010 by Alkaloid Networks, LLC\n");
printf(" Copyright 2000-2005 by Jacob Rief <[email protected]>\n");
printf("\n");
printf(" Released under the terms of the GPL.\n");
printf(" http://projects.alkaloid.net\n");
printf("\n");
}
static void die_ldap(int err)
{
fprintf(stderr, "Fatal LDAP error: %s\n", ldap_err2string(err));
exit(1);
}
static struct
{
char domainname[64];
char zonemaster[64];
char class[16];
char adminmailbox[64];
char serial[12];
char refresh[12];
char retry[12];
char expire[12];
char minimum[12];
char ttl[12];
char timestamp[20];
char location[2];
} zone;
static struct
{
char locname[3];
char member[256][16];
} loc_rec;
struct resourcerecord
{
char cn[64];
char dnsdomainname[MAX_DOMAIN_LEN];
char class[16];
char type[16];
char ipaddr[256][80];
char cipaddr[80];
char cname[1024]; /* large enough to store DKIM entries, which by rfc5322 have an upper-limit of 998chars */
char ttl[12];
char timestamp[20];
char preference[12];
char location[2];
#if defined DRAFT_RFC
char rr[1024];
char aliasedobjectname[256];
char macaddress[32];
#endif
int srvpriority;
int srvweight;
int srvport;
char txt[256];
};
static struct
{
char searchbase[128];
char binddn[128];
char hostname[MAXHOSTS][128];
char urildap[MAXHOSTS][128];
unsigned short port[MAXHOSTS];
char password[128];
int usedhosts;
int useduris;
int is_daemon;
int foreground;
unsigned int update_iv;
unsigned int output;
int verbose;
char ldifname[128];
char exec_command[128];
int use_tls[MAXHOSTS];
struct timeval searchtimeout;
int reclimit;
} options;
static void die_exit(const char* message)
{
if (message)
fprintf(stderr, "Fatal error: %s\n", message);
else
fprintf(stderr, "Fatal memory error\n");
exit(1);
}
static void set_datadir(void)
{
char* ev = getenv("TINYDNSDIR");
if (!ev)
ev = getenv("LDAP2DNS_TINYDNSDIR");
int len;
tinydns_textfile[0] = '\0';
tinydns_texttemp[0] = '\0';
if (ev && (len = strlen(ev))<240) {
strncpy(tinydns_textfile, ev, 240);
strncpy(tinydns_texttemp, ev, 240);
if (ev[len-1]!='/') {
tinydns_textfile[len] = '/';
tinydns_texttemp[len] = '/';
}
}
strcat(tinydns_textfile, "data");
strcat(tinydns_texttemp, "data.temp");
}
static void print_usage(void)
{
print_version();
printf("usage: ldap2dns[d] [-df] [-o tinydns|bind] [-h host] [-p port] [-H hostURI] \\\n");
printf("\t\t[-D binddn] [-w password] [-L[filename]] [-u numsecs] \\\n");
printf("\t\t[-b searchbase] [-v[v]] [-V] [-t timeout] [-M maxrecords]\n");
printf("\n");
printf(" *\tldap2dns formats DNS information from an LDAP server for tinydns or BIND\n");
printf(" *\tldap2dnsd runs backgrounded refreshing the data on regular intervals\n");
printf("\n");
printf("options:\n");
printf(" -D binddn\tUse the distinguished name binddn to bind to the LDAP directory\n");
printf(" -w bindpasswd\tUse bindpasswd as the password for simple authentication\n");
printf(" -b\t\tSearch base to use instead of default\n");
printf(" -o tinydns\tGenerate a tinydns compatible \"data\" file\n");
printf(" -o bind\t\tGenerate a BIND compatible zone files\n");
printf(" -L [filename]\tPrint output in LDIF format for reimport\n");
printf(" -h host\tHostname of LDAP server, defaults to localhost\n");
printf(" -p port\tPort number to connect to LDAP server, defaults to %d\n", LDAP_PORT);
printf(" -H hostURI\tURI (ldap://hostname or ldaps://hostname of LDAP server\n");
printf(" -u numsecs\tUpdate DNS data after numsecs. Defaults to %d. Daemon mode only\n", UPDATE_INTERVAL);
printf(" -e \"exec-cmd\"\tCommand to execute after data is generated\n");
printf(" -d\t\tRun as a daemon (same as if invoked as ldap2dnsd)\n");
printf(" -f\t\tIf running as a daemon stay in the foreground (do not fork)\n");
printf(" -v\t\trun in verbose mode, repeat for more verbosity\n");
printf(" -V\t\tprint version and exit\n");
printf("\n");
printf("Note: Zone data are only updated after zone serials increment.\n");
}
static void parse_hosts(char* buf)
{
int i, k;
unsigned short port;
char value[128], rest[512];
options.usedhosts = 0;
options.useduris = 0;
for (i = 0; i<MAXHOSTS; i++) {
if (!strncasecmp(buf, "ldaps://", 8) || !strncasecmp(buf, "ldap://", 7)) {
if (!strncasecmp(buf, "ldap://", 7))
options.use_tls[i] = 1;
if ((k = sscanf(buf, "%128s %512[A-Za-z0-9 .:/_+-]", value, rest))>=1) {
strncpy(options.urildap[i], value, sizeof(options.urildap[i]));
options.urildap[i][ sizeof(options.urildap[i]) -1 ] = '\0';
options.useduris++;
if (k==1)
break;
buf = rest;
} else break;
} else if ((k = sscanf(buf, "%128s:%hd %512[A-Za-z0-9 .:_+-]", value, &port, rest))>=2) {
strcpy(options.hostname[i], value);
options.port[i] = port;
options.usedhosts++;
if (k==2)
break;
buf = rest;
} else if ((k = sscanf(buf, "%128s %512[A-Za-z0-9 .:_+-]", value, rest))>=1) {
strcpy(options.hostname[i], value);
options.port[i] = LDAP_PORT;
options.usedhosts++;
if (k==1)
break;
buf = rest;
} else break;
}
}
static int parse_options()
{
extern char* optarg;
extern int optind, opterr, optopt;
char buf[256], value[128];
int len;
short slen;
int c;
int digit_optind = 0;
FILE* ldap_conf,*fp;
char* ev;
int tmp;
short stmp;
int i;
/* Initialize the options to their defaults */
len = strlen(main_argv[0]);
if (strcmp(main_argv[0]+len-9, "ldap2dnsd")==0) {
options.is_daemon = 1;
options.update_iv = UPDATE_INTERVAL;
} else {
options.is_daemon = 0;
options.update_iv = 0;
}
strcpy(options.binddn, "");
strcpy(options.password, "");
strcpy(options.searchbase, "");
strcpy(options.hostname[0], "localhost");
options.port[0] = LDAP_PORT;
options.searchtimeout.tv_sec = DEF_SEARCHTIMEOUT;
options.reclimit = DEF_RECLIMIT;
options.output = 0;
options.verbose = 0;
options.ldifname[0] = '\0';
strcpy(options.exec_command, "");
/* Attempt to parse the ldap.conf for system-wide valuse */
if (ldap_conf = fopen(LDAP_CONF, "r")) {
while(fgets(buf, 256, ldap_conf)!=0) {
int i;
if (sscanf(buf, "BASE %128s", value)==1){
strncpy(options.searchbase, value, sizeof(options.searchbase));
options.searchbase[sizeof(options.searchbase) -1] = '\0';
}
if (sscanf(buf, "URI %512[A-Za-z0-9 .:/_+-]", value)==1)
parse_hosts(value);
if (sscanf(buf, "HOST %512[A-Za-z0-9 .:_+-]", value)==1)
parse_hosts(value);
if (sscanf(buf, "PORT %hd", &slen)==1)
for (i = 0; i<MAXHOSTS; i++)
options.port[i] = len;
if (sscanf(buf, "BINDDN %128s", value)==1) {
strncpy(options.binddn, value, sizeof(options.binddn));
options.binddn[ sizeof(options.binddn) -1] = '\0';
if (sscanf(buf, "BINDPW %128s", value)==1)
strncpy(options.password, value, sizeof(options.password));
options.password[ sizeof(options.password) -1 ] = '\0';
}
}
fclose(ldap_conf);
}
/* Check the environment for process-local configuration overrides */
if (getenv("LDAP2DNS_DAEMONIZE") != NULL) {
options.is_daemon = 1;
ev = getenv("LDAP2DNS_UPDATE");
if (ev && sscanf(ev, "%d", &len)==1 && len>0) {
options.update_iv = len;
} else {
/* We have not yet had a chance to override the default
* interval so use the default.
*/
options.update_iv = UPDATE_INTERVAL;
}
}
ev = getenv("LDAP2DNS_BINDDN");
if (ev) {
strncpy(options.binddn, ev, sizeof(options.binddn));
options.binddn[ sizeof(options.binddn) -1 ] = '\0';
ev = getenv("LDAP2DNS_PASSWORD");
if (ev){
strncpy(options.password, ev, sizeof(options.password));
options.password[ sizeof(options.password) -1 ] = '\0';
memset(ev, 'x', strlen(options.password));
}
}
ev = getenv("LDAP2DNS_BASEDN");
if (ev) {
strncpy(options.searchbase, ev, sizeof(options.searchbase));
options.searchbase[ sizeof(options.searchbase) -1 ] = '\0';
}
ev = getenv("LDAP2DNS_HOST");
if (ev) {
strncpy(options.hostname[options.usedhosts], ev, sizeof(options.hostname[options.usedhosts]));
options.hostname[options.usedhosts][ sizeof(options.hostname[options.usedhosts]) -1 ] = '\0';
options.usedhosts++;
ev = getenv("LDAP2DNS_PORT");
if (ev && sscanf(ev, "%hd", &stmp) != 1)
for (i = 0; i<MAXHOSTS; i++)
options.port[i] = tmp;
}
ev = getenv("LDAP2DNS_URI");
if (ev) {
if (sscanf(ev, "%512[A-Za-z0-9 .:/_+-]", value)==1)
parse_hosts(value);
}
ev = getenv("LDAP2DNS_TIMEOUT");
if (ev && sscanf(ev, "%hd", (short *)&options.searchtimeout.tv_sec) != 1)
options.searchtimeout.tv_sec = DEF_SEARCHTIMEOUT;
ev = getenv("LDAP2DNS_RECLIMIT");
if (ev && sscanf(ev, "%d", &options.reclimit) != 1)
options.reclimit = DEF_RECLIMIT;
ev = getenv("LDAP2DNS_OUTPUT");
if (ev) {
if (strcmp(ev, "bind")==0)
options.output = OUTPUT_DB;
else if (strcmp(ev, "tinydns")==0)
options.output = OUTPUT_DATA;
else if (strcmp(ev, "db")==0)
// Backward compatibility
options.output = OUTPUT_DB;
else if (strcmp(ev, "data")==0)
// Backward compatibility
options.output = OUTPUT_DATA;
}
ev = getenv("LDAP2DNS_VERBOSE");
if (ev && sscanf(ev, "%hd", (short *)&options.verbose) != 1)
options.verbose = 0;
ev = getenv("LDAP2DNS_EXEC");
if (ev) {
strncpy(options.exec_command, ev, sizeof(options.exec_command));
options.exec_command[ sizeof( options.exec_command ) -1 ] = '\0';
}
/* Finally, parse command-line options */
while (1) {
int this_option_optind = optind ? optind : 1;
int option_index = 0;
static struct option long_options[] = {
// name, has_arg, flag, val
{"help", 0, 0, '?'},
{"binddn", 1, 0, 'D'},
{"bindpw", 1, 0, 'w'},
{"basedn", 1, 0, 'b'},
{"output", 1, 0, 'o'},
{"ldif", 1, 0, 'L'},
{"host", 1, 0, 'h'},
{"port", 1, 0, 'p'},
{"uri", 1, 0, 'H'},
{"update", 1, 0, 'u'},
{"exec", 1, 0, 'e'},
{"verbose", 0, 0, 'v'},
{"version", 0, 0, 'V'},
{"timeout", 1, 0, 't'},
{"maxrecords", 1, 0, 'M'},
{"daemonize", 0, 0, 'd'},
{"foreground", 0, 0, 'f'},
{0, 0, 0, 0}
};
c = getopt_long(main_argc, main_argv, "b:dD:e:fh:H:o:p:u:M:m:t:Vv::w:L::", long_options, &option_index);
if (c == -1)
break;
if (optarg && strlen(optarg)>127) {
fprintf(stderr, "argument %s too long\n", optarg);
continue;
}
switch (c) {
case 'b':
strncpy(options.searchbase, optarg, sizeof(options.searchbase));
options.searchbase[ sizeof(options.searchbase)-1 ] = '\0';
break;
case 'u':
if (sscanf(optarg, "%d", &options.update_iv)!=1)
options.update_iv = UPDATE_INTERVAL;
if (options.update_iv<=0) options.update_iv = 1;
break;
case 'D':
strncpy(options.binddn, optarg, sizeof(options.binddn));
options.binddn[ sizeof(options.binddn) -1 ] = '\0';
break;
case 'h':
strncpy(options.hostname[options.usedhosts], optarg, sizeof(options.hostname[options.usedhosts]));
options.hostname[options.usedhosts][ sizeof(options.hostname[options.usedhosts]) -1 ] = '\0';
options.usedhosts++;
break;
case 'H':
strncpy(options.urildap[0], optarg, sizeof(options.urildap[0]));
options.urildap[0][ sizeof( options.urildap[0] ) -1 ] = '\0';
options.useduris = 1;
break;
case 'L':
if (optarg==NULL)
strcpy(options.ldifname, "-");
else{
strncpy(options.ldifname, optarg, sizeof(options.ldifname));
options.ldifname[ sizeof( options.ldifname ) -1 ] = '\0';
}
break;
case 'o':
options.output = 0;
if (strcmp(optarg, "tinydns")==0)
options.output = OUTPUT_DATA;
else if (strcmp(optarg, "bind")==0)
options.output = OUTPUT_DB;
else if (strcmp(optarg, "data")==0)
// Backward compatibility
options.output = OUTPUT_DATA;
else if (strcmp(optarg, "db")==0)
// Backward compatibility
options.output = OUTPUT_DB;
break;
case 'p':
if (sscanf(optarg, "%hd", &options.port[0])!=1)
options.port[0] = LDAP_PORT;
break;
case 'v':
if (optarg)
options.verbose = strlen(optarg) + 1;
else
options.verbose = 1;
break;
case 'V':
print_version();
exit(0);
case 'w':
strncpy(options.password, optarg, sizeof(options.password));
options.password[ sizeof( options.password ) -1 ] = '\0';
memset(optarg, 'x', strlen(options.password));
break;
case 'e':
strncpy(options.exec_command, optarg, sizeof(options.exec_command));
options.exec_command[ sizeof( options.exec_command ) -1 ] = '\0';
break;
case 't':
if (sscanf(optarg, "%hd", (short *)&options.searchtimeout.tv_sec)!=1)
options.searchtimeout.tv_sec = DEF_SEARCHTIMEOUT;
break;
case 'M':
if (sscanf(optarg, "%d", &options.reclimit)!=1)
options.reclimit = DEF_RECLIMIT;
break;
case 'd':
options.is_daemon = 1;
break;
case 'f':
options.foreground = 1;
break;
case '?':
default:
print_usage();
exit(1);
}
}
if (options.is_daemon==1 && options.foreground==1)
options.is_daemon = 2; /* foreground daemon */
}
static int expand_domainname(char target[MAX_DOMAIN_LEN], const char* source, int slen)
{
int tlen;
tlen = strlen(zone.domainname);
if ((slen + tlen) > MAX_DOMAIN_LEN)
return 0;
if (source[slen-1]=='.') {
strncpy(target, source, slen-1);
target[slen-1] = '\0';
return 1;
}
strncpy(target, source, slen);
target[slen] = '\0';
if (zone.domainname[0]) {
if (zone.domainname[0]!='.')
strcat(target, ".");
strcat(target, zone.domainname);
return 1;
}
return 0;
}
static int expand_reverse(char target[64], const char* source)
{
}
static void write_rr(struct resourcerecord* rr, int ipdx, int znix)
{
char ip[4];
char buf[4];
char *tmp;
char *p;
int i;
int res;
unsigned char in6addr[sizeof(struct in6_addr)];
if (strcasecmp(rr->class, "IN"))
return;
if (strcasecmp(rr->type, "NS")==0) {
if (tinyfile) {
if (znix==0) {
if (ipdx<=0 && rr->cipaddr[0]) {
fprintf(tinyfile, "&%s::%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->ttl, rr->timestamp, rr->location);
if (rr->cname[0])
fprintf(tinyfile, "=%s:%s:%s:%s:%s\n", rr->cname, rr->cipaddr, rr->ttl, rr->timestamp, rr->location);
if (ipdx==0)
fprintf(tinyfile, "+%s:%s:%s:%s:%s\n", rr->cname, rr->ipaddr[0], rr->ttl, rr->timestamp, rr->location);
} else if (ipdx<0)
fprintf(tinyfile, "&%s::%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->ttl, rr->timestamp, rr->location);
else if (ipdx==0)
fprintf(tinyfile, "&%s:%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->ipaddr[0], rr->cname, rr->ttl, rr->timestamp, rr->location);
else if (ipdx>0 && rr->cname[0])
fprintf(tinyfile, "+%s:%s:%s:%s:%s\n", rr->cname, rr->ipaddr[ipdx], rr->ttl, rr->timestamp, rr->location);
} else if (ipdx<=0) {
fprintf(tinyfile, "&%s::%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->ttl, rr->timestamp, rr->location);
}
}
if (namedzone) {
fprintf(namedzone, "%s.\t%s\tIN NS\t%s.\n", rr->dnsdomainname, rr->ttl, rr->cname);
if (ipdx>=0)
fprintf(namedzone, "%s.\t%s\tIN A\t%s\n", rr->cname, rr->ttl, rr->ipaddr[ipdx]);
}
} else if (strcasecmp(rr->type, "MX")==0) {
if (tinyfile) {
if (znix==0) {
if (ipdx<=0 && rr->cipaddr[0]) {
fprintf(tinyfile, "@%s::%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->preference, rr->ttl, rr->timestamp, rr->location);
if (rr->cname[0])
fprintf(tinyfile, "=%s:%s:%s:%s:%s\n", rr->cname, rr->cipaddr, rr->ttl, rr->timestamp, rr->location);
if (ipdx==0)
fprintf(tinyfile, "+%s:%s:%s:%s:%s\n", rr->cname, rr->ipaddr[0], rr->ttl, rr->timestamp, rr->location);
} else if (ipdx<0)
fprintf(tinyfile, "@%s::%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->preference, rr->ttl, rr->timestamp, rr->location);
else if (ipdx==0)
fprintf(tinyfile, "@%s:%s:%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->ipaddr[0], rr->cname, rr->preference, rr->ttl, rr->timestamp, rr->location);
else if (ipdx>0 && rr->cname[0])
fprintf(tinyfile, "+%s:%s:%s:%s:%s\n", rr->cname, rr->ipaddr[ipdx], rr->ttl, rr->timestamp, rr->location);
} else if (ipdx<=0) {
fprintf(tinyfile, "@%s::%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->preference, rr->ttl, rr->timestamp, rr->location);
}
}
if (namedzone) {
fprintf(namedzone, "%s.\t%s\tIN MX\t%s %s.\n", rr->dnsdomainname, rr->ttl, rr->preference, rr->cname);
if (ipdx>=0)
fprintf(namedzone, "%s.\t%s\tIN A\t%s\n", rr->cname, rr->ttl, rr->ipaddr[ipdx]);
}
} else if ( strcasecmp(rr->type, "A")==0) {
if (tinyfile) {
if (ipdx<=0 && rr->cipaddr[0])
fprintf(tinyfile, "%s%s:%s:%s:%s:%s\n", (znix==0 ? "=" : "+"), rr->dnsdomainname, rr->cipaddr, rr->ttl, rr->timestamp, rr->location);
if (ipdx>=0)
fprintf(tinyfile, "+%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->ipaddr[ipdx], rr->ttl, rr->timestamp, rr->location);
}
if (namedzone) {
if (ipdx<=0 && rr->cipaddr[0])
fprintf(namedzone, "%s.\t%s\tIN A\t%s\n", rr->dnsdomainname, rr->ttl, rr->cipaddr);
if (ipdx>=0)
fprintf(namedzone, "%s.\t%s\tIN A\t%s\n", rr->dnsdomainname, rr->ttl, rr->ipaddr[ipdx]);
}
} else if (strcasecmp(rr->type, "PTR")==0) {
int ip[4] = {0, 0, 0, 0};
char buf[256];
char tmp[8];
if (ipdx>0) {
/* does not make to have more than one IPaddr for a PTR record */
return;
}
if (ipdx==0 && sscanf(rr->ipaddr[0], "%d.%d.%d.%d", &ip[0], &ip[1], &ip[2], &ip[3])==4) {
/* lazy user, used DNSipaddr for reverse lookup */
snprintf(buf, sizeof(buf), "%d.%d.%d.%d.in-addr.arpa", ip[3], ip[2], ip[1], ip[0]);
} else if (ipdx==0 && inet_pton(AF_INET6, rr->ipaddr[0], in6addr)==1) {
*buf = '\0';
for (i = 15; i >= 0; i--) {
sprintf(tmp, "%x.", in6addr[i] & 0xf);
strcat(buf, tmp);
sprintf(tmp, "%x.", in6addr[i] >> 4);
strcat(buf, tmp);
}
strcat(buf, "ip6.int.");
} else {
strncpy(buf, rr->dnsdomainname, sizeof(buf));
buf[ sizeof(buf) -1 ] = '\0';
}
if (tinyfile)
fprintf(tinyfile, "^%s:%s:%s:%s:%s\n", buf, rr->cname, rr->ttl, rr->timestamp, rr->location);
if (namedzone)
fprintf(namedzone, "%s.\t%s\tIN PTR\t%s.\n", buf, rr->ttl, rr->cname);
} else if (strcasecmp(rr->type, "CNAME")==0) {
if (tinyfile)
fprintf(tinyfile, "C%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->cname, rr->ttl, rr->timestamp, rr->location);
if (namedzone)
fprintf(namedzone, "%s.\t%s\tIN CNAME\t%s.\n", rr->dnsdomainname, rr->ttl, rr->cname);
} else if (strcasecmp(rr->type, "TXT")==0) {
if (tinyfile)
fprintf(tinyfile, "'%s:%s:%s:%s:%s\n", rr->dnsdomainname, rr->txt, rr->ttl, rr->timestamp, rr->location);
if (namedzone)
fprintf(namedzone, "%s.\t%s\tIN TXT\t\"%s\"\n", rr->dnsdomainname, rr->ttl, rr->txt);
} else if (strcasecmp(rr->type, "SRV")==0) {
if (tinyfile) {
fprintf(tinyfile, ":%s:33:\\%03o\\%03o\\%03o\\%03o\\%03o\\%03o", rr->dnsdomainname, rr->srvpriority >> 8, rr->srvpriority & 0xff, rr->srvweight >> 8, rr->srvweight & 0xff, rr->srvport >> 8, rr->srvport & 0xff);
tmp = strdup(rr->cname);
while (p = strchr(tmp, '.')) {
*p = '\0';
p++;
fprintf(tinyfile, "\\%03o%s", (unsigned int)strlen(tmp), tmp);
tmp = p;
}
fprintf(tinyfile, "\\%03o%s", (unsigned int)strlen(tmp), tmp);
fprintf(tinyfile, "\\000:%s:%s:%s\n", rr->ttl, rr->timestamp, rr->location);
}
if (namedzone) {
fprintf(namedzone, "%s.\t%s\tIN SRV\t%d\t%d\t%d\t%s.\n", rr->dnsdomainname, rr->ttl, rr->srvpriority, rr->srvweight, rr->srvport, rr->cname);
}
} else if (strcasecmp(rr->type, "AAAA")==0) {
/* Even though we don't use the result of inet_pton() for BIND,
* we can use it to validate the address. */
if (strlen(rr->cipaddr) > 0) {
res = inet_pton(AF_INET6, rr->cipaddr, in6addr);
} else {
res = inet_pton(AF_INET6, rr->ipaddr[0], in6addr);
}
if (res == 1) {
/* Valid IPv6 address found. */
if (tinyfile) {
fprintf(tinyfile, ":%s:28:", rr->dnsdomainname);
for (i=0;i<16;i++) {
fprintf(tinyfile, "\\%03o", in6addr[i]);
}
fprintf(tinyfile, ":%s:%s:%s\n", rr->ttl, rr->timestamp, rr->location);
}
if (namedzone) {
fprintf(namedzone, "%s.\t%s\tIN AAAA\t%s\n", rr->dnsdomainname, rr->ttl, rr->ipaddr[0]);
}
} else {
fprintf(stderr, "[**] Invalid IPv6 address found for %s; skipping record.\n", rr->dnsdomainname);
}
}
}
#if defined DRAFT_RFC
static void parse_rr(struct resourcerecord* rr)
{
char word1[64];
char word2[64];
int ip[4];
sscanf(rr->rr, "%16s %16s %64s %64s", rr->class, rr->type, word1, word2);
if (strcasecmp(rr->type, "NS")==0) {
if (sscanf(word1, "%d.%d.%d.%d", &ip[0], &ip[1], &ip[2], &ip[3])==4) {
snprintf(rr->ipaddr[0], sizeof(rr->ipaddr[0]), "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
} else {
int len = strlen(word1);
expand_domainname(rr->cname, word1, len);
}
} else if (strcasecmp(rr->type, "MX")==0) {
if (sscanf(word1, "%s", rr->preference)!=1)
rr->preference[0] = '\0';
if (sscanf(word2, "%d.%d.%d.%d", &ip[0], &ip[1], &ip[2], &ip[3])==4) {
snprintf(rr->ipaddr[0], sizeof(rr->ipaddr[0]), "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
} else {
int len = strlen(word2);
expand_domainname(rr->cname, word2, len);
}
} else if (strcasecmp(rr->type, "A")==0) {
if (sscanf(word1, "%d.%d.%d.%d", &ip[0], &ip[1], &ip[2], &ip[3])==4)
snprintf(rr->ipaddr[0], sizeof(rr->ipaddr[0]), "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
else
rr->ipaddr[0][0] = '\0';
} else if (strcasecmp(rr->type, "PTR")==0) {
expand_reverse(rr->dnsdomainname, word1);
} else if (strcasecmp(rr->type, "CNAME")==0) {
int len = strlen(word1);
expand_reverse(rr->cname, word1);
} else if (strcasecmp(rr->type, "TXT")==0) {
strncpy(rr->cname, word1, sizeof(rr->cname));
}
}
#endif
static void read_resourcerecords(char* dn, int znix)
{
LDAPMessage* res = NULL;
LDAPMessage* m;
int ldaperr;
if ( (ldaperr = ldap_search_ext_s(ldap_con, dn, LDAP_SCOPE_SUBTREE, "objectclass=DNSrrset", NULL, 0, NULL, NULL, &options.searchtimeout, options.reclimit, &res))!=LDAP_SUCCESS )
die_ldap(ldaperr);
if (ldap_count_entries(ldap_con, res) < 1) {
fprintf(stderr, "\n[**] Warning: No DNS records found for domain %s.\n\n", zone.domainname);
return;
}
for (m = ldap_first_entry(ldap_con, res); m; m = ldap_next_entry(ldap_con, m)) {
BerElement* ber = NULL;
char* attr;
char* dn = ldap_get_dn(ldap_con, m);
struct resourcerecord rr;
int ipaddresses = 0;
if (options.ldifname[0])
fprintf(ldifout, "dn: %s\n", dn);
rr.cn[0] = '\0';
strncpy(rr.dnsdomainname, zone.domainname, 64);
strncpy(rr.class, "IN", 3);
rr.type[0] = '\0';
rr.cname[0] = '\0';
rr.cipaddr[0] = '\0';
rr.ttl[0] = '\0';
rr.timestamp[0] = '\0';
rr.preference[0] = '\0';
rr.location[0] = '\0';
#if defined DRAFT_RFC
rr.aliasedobjectname[0] = '\0';
rr.rr[0] = '\0';
#endif
rr.srvpriority = 0;
rr.srvweight = 0;
rr.srvport = 0;
for (attr = ldap_first_attribute(ldap_con, m, &ber); attr; attr = ldap_next_attribute(ldap_con, m, ber)) {
int len = strlen(attr);
struct berval** bvals;
char* dnsnname = "";
if ( (bvals = ldap_get_values_len(ldap_con, m, attr))!=NULL ) {
if (bvals[0] && bvals[0]->bv_len>0) {
if (strcasecmp(attr, "objectclass")==0) {
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, bvals[0]->bv_val);
} else if (strcasecmp(attr, "cn")==0) {
strncpy(rr.cn, bvals[0]->bv_val, 64);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.cn);
} else if (strcasecmp(attr, "DNSdomainname")==0) {
if (!expand_domainname(rr.dnsdomainname, bvals[0]->bv_val, bvals[0]->bv_len))
rr.dnsdomainname[0] = '\0';;
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, bvals[0]->bv_val);
} else if (strcasecmp(attr, "DNSclass")==0) {
if (sscanf(bvals[0]->bv_val, "%16s", rr.class)!=1)
rr.class[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.class);
} else if (strcasecmp(attr, "DNStype")==0) {
if (sscanf(bvals[0]->bv_val, "%16s", rr.type)!=1)
rr.type[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.type);
} else if (strcasecmp(attr, "DNSipaddr")==0) {
int ip[4];
unsigned char in6addr[sizeof(struct in6_addr)];
for (ipaddresses = 0; bvals[ipaddresses] && ipaddresses<256; ipaddresses++) {
rr.ipaddr[ipaddresses][0] = '\0';
if (inet_pton(AF_INET6, bvals[ipaddresses]->bv_val, in6addr)==1) {
snprintf(rr.ipaddr[ipaddresses], sizeof(rr.ipaddr[ipaddresses]), "%s", bvals[ipaddresses]->bv_val);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.ipaddr[ipaddresses]);
} else if (sscanf(bvals[ipaddresses]->bv_val, "%d.%d.%d.%d", &ip[0], &ip[1], &ip[2], &ip[3])==4) {
snprintf(rr.ipaddr[ipaddresses], sizeof(rr.ipaddr[ipaddresses]), "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.ipaddr[ipaddresses]);
}
}
} else if (strcasecmp(attr, "DNScipaddr")==0) {
int ip[4];
unsigned char in6addr[sizeof(struct in6_addr)];
if (inet_pton(AF_INET6, bvals[0]->bv_val, in6addr)==1) {
snprintf(rr.cipaddr, sizeof(rr.cipaddr), "%s", bvals[0]->bv_val);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.cipaddr);
} else if (sscanf(bvals[0]->bv_val, "%d.%d.%d.%d", &ip[0], &ip[1], &ip[2], &ip[3])==4) {
snprintf(rr.cipaddr, sizeof(rr.cipaddr), "%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.cipaddr);
}
} else if (strcasecmp(attr, "DNScname")==0) {
if (!expand_domainname(rr.cname, bvals[0]->bv_val, bvals[0]->bv_len))
rr.cname[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, bvals[0]->bv_val);
} else if (strcasecmp(attr, "DNStxt")==0) {
strncpy(rr.txt, bvals[0]->bv_val, sizeof(rr.txt) - 1);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, bvals[0]->bv_val);
} else if (strcasecmp(attr, "DNSttl")==0) {
if (sscanf(bvals[0]->bv_val, "%12s", rr.ttl)!=1)
rr.ttl[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.ttl);
} else if (strcasecmp(attr, "DNStimestamp")==0) {
if (sscanf(bvals[0]->bv_val, "%16s", rr.timestamp)!=1)
rr.timestamp[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.timestamp);
} else if (strcasecmp(attr, "DNSpreference")==0) {
if (sscanf(bvals[0]->bv_val, "%s", rr.preference)!=1)
rr.preference[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, bvals[0]->bv_val);
} else if (strcasecmp(attr, "DNSlocation")==0) {
if (sscanf(bvals[0]->bv_val, "%s", rr.location)!=1)
rr.location[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, bvals[0]->bv_val);
}
#if defined DRAFT_RFC
else if (strcasecmp(attr, "DNSrr")==0) {
strncpy(rr.rr, bvals[0]->bv_val, 1024);
if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.rr);
} else if (strcasecmp(attr, "DNSaliasedobjectname")==0) {
if (sscanf(bvals[0]->bv_val, "%256s", rr.aliasedobjectname)!=1)
rr.aliasedobjectname[0] = '\0';
else if (options.ldifname[0])
fprintf(ldifout, "%s: %s\n", attr, rr.aliasedobjectname);
} else if (strcasecmp(attr, "DNSmacaddress")==0) {
}
#endif
else if (strcasecmp(attr, "DNSsrvpriority")==0) {
if (!(rr.srvpriority = atoi(bvals[0]->bv_val)))
rr.srvpriority = 0;
else if (options.ldifname[0])
fprintf(ldifout, "%s: %d\n", attr, rr.srvpriority);
} else if (strcasecmp(attr, "DNSsrvweight")==0) {
if (!(rr.srvweight = atoi(bvals[0]->bv_val)))
rr.srvweight = 0;
else if (options.ldifname[0])
fprintf(ldifout, "%s: %d\n", attr, rr.srvweight);
} else if (strcasecmp(attr, "DNSsrvport")==0) {
if (!(rr.srvport = atoi(bvals[0]->bv_val)))
rr.srvport = 0;
else if (options.ldifname[0])
fprintf(ldifout, "%s: %d\n", attr, rr.srvport);
}
}
ldap_value_free_len(bvals);
}
}
#if defined DRAFT_RFC
if (rr.rr[0]) {
parse_rr(&rr);
}
#endif
do {
ipaddresses--;
write_rr(&rr, ipaddresses, znix);
} while (ipaddresses>0);
#if defined DRAFT_RFC
if (rr.aliasedobjectname[0])
read_resourcerecords(rr.aliasedobjectname);
#endif
if (options.ldifname[0])
fprintf(ldifout, "\n");
if (options.verbose&2)
printf("\trr: %s %s %s\n", rr.class, rr.type, rr.dnsdomainname);
free(dn);
}
ldap_msgfree(res);
}
static void write_zone(void)
{
int len;
char soa[20];
if (tinyfile) {
fprintf(tinyfile, "Z%s:%s:%s:%s:%s:%s:%s:%s:%s:%s:%s\n",
zone.domainname, zone.zonemaster, zone.adminmailbox,
zone.serial, zone.refresh, zone.retry, zone.expire,
zone.minimum, zone.ttl, zone.timestamp, zone.location);
}
if (namedmaster) {
fprintf(namedmaster, "zone \"%s\" %s {\n\ttype master;\n\tfile \"%s.db\";\n};\n",
zone.domainname, zone.class, zone.domainname);
}
if (namedzone) {
fprintf(namedzone, ";\n; Automatically generated by ldap2dns v%s - DO NOT EDIT!\n;\n\n", VERSION);
if (zone.ttl[0])
fprintf(namedzone, "$TTL %s\n", zone.ttl);
else
fprintf(namedzone, "$TTL 3600\n");
fprintf(namedzone, "%s. IN SOA ", zone.domainname);
len = strlen(zone.zonemaster);
fprintf(namedzone, (zone.zonemaster[len-1]=='.') ? "%s " : "%s. ", zone.zonemaster);
len = strlen(zone.adminmailbox);
fprintf(namedzone, (zone.adminmailbox[len-1]=='.') ? "%s " : "%s. ", zone.adminmailbox);
fprintf(namedzone, "(\n\t%s\t; Serial\n\t%s\t; Refresh\n\t%s\t; Retry\n\t%s\t; Expire\n\t%s )\t; Minimum\n", zone.serial, zone.refresh, zone.retry, zone.expire, zone.minimum);
}
if (options.ldifname[0])
fprintf(ldifout, "\n");
}
static void calc_checksum(int* num, int* sum)
{
LDAPMessage* res = NULL;
LDAPMessage* m;
int ldaperr;
char* attr_list[2] = { "DNSserial", NULL };
*num = *sum = 0;
if ( ldaperr = ldap_search_ext_s(ldap_con, options.searchbase[0] ? options.searchbase : NULL, LDAP_SCOPE_ONELEVEL, "objectclass=DNSzone", attr_list, 0, NULL, NULL, &options.searchtimeout, options.reclimit, &res)!=LDAP_SUCCESS )
die_ldap(ldaperr);
if (ldap_count_entries(ldap_con, res) < 1) {
fprintf(stderr, "\n[**] Warning: No records returned from search. Check for correct credentials,\n[**] LDAP hostname, and search base DN.\n\n");
return;
}
for (m = ldap_first_entry(ldap_con, res); m; m = ldap_next_entry(ldap_con, m)) {
BerElement* ber = NULL;
char* attr = ldap_first_attribute(ldap_con, m, &ber);
if (attr) {
struct berval** bvals = ldap_get_values_len(ldap_con, m, attr);
if (bvals!=NULL) {
unsigned tmp;
if (sscanf(bvals[0]->bv_val, "%u", &tmp)==1) {
(*num)++;
*sum += tmp;
}
ldap_value_free_len(bvals);
}
}
ber_free(ber, 0);
}
ldap_msgfree(res);
}
static void read_dnszones(void)
{
LDAPMessage* res = NULL;
LDAPMessage* m;
int ldaperr;
if (tinyfile)
fprintf(tinyfile, "#\n# Automatically generated by ldap2dns v%s - DO NOT EDIT!\n#\n\n", VERSION);
if (namedmaster)
fprintf(namedmaster, "#\n# Automatically generated by ldap2dns v%s - DO NOT EDIT!\n#\n\n", VERSION);
if ( (ldaperr = ldap_search_ext_s(ldap_con, options.searchbase[0] ? options.searchbase : NULL, LDAP_SCOPE_SUBTREE, "objectclass=DNSzone", NULL, 0, NULL, NULL, &options.searchtimeout, options.reclimit, &res))!=LDAP_SUCCESS )
die_ldap(ldaperr);
if (ldap_count_entries(ldap_con, res) < 1) {
fprintf(stderr, "\n[**] Warning: No records returned from search. Check for correct credentials,\n[**] LDAP hostname, and search base DN.\n\n");
return;
}
for (m = ldap_first_entry(ldap_con, res); m; m = ldap_next_entry(ldap_con, m)) {
BerElement* ber = NULL;