/* dnsmasq is Copyright (c) 2000-2021 Simon Kelley 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; version 2 dated June, 1991, or (at your option) version 3 dated 29 June, 2007. 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, see . */ /* define this to get facilitynames */ #define SYSLOG_NAMES #include "dnsmasq.h" #include static volatile int mem_recover = 0; static jmp_buf mem_jmp; static int one_file(char *file, int hard_opt); /* Solaris headers don't have facility names. */ #ifdef HAVE_SOLARIS_NETWORK static const struct { char *c_name; unsigned int c_val; } facilitynames[] = { { "kern", LOG_KERN }, { "user", LOG_USER }, { "mail", LOG_MAIL }, { "daemon", LOG_DAEMON }, { "auth", LOG_AUTH }, { "syslog", LOG_SYSLOG }, { "lpr", LOG_LPR }, { "news", LOG_NEWS }, { "uucp", LOG_UUCP }, { "audit", LOG_AUDIT }, { "cron", LOG_CRON }, { "local0", LOG_LOCAL0 }, { "local1", LOG_LOCAL1 }, { "local2", LOG_LOCAL2 }, { "local3", LOG_LOCAL3 }, { "local4", LOG_LOCAL4 }, { "local5", LOG_LOCAL5 }, { "local6", LOG_LOCAL6 }, { "local7", LOG_LOCAL7 }, { NULL, 0 } }; #endif #ifndef HAVE_GETOPT_LONG struct myoption { const char *name; int has_arg; int *flag; int val; }; #endif #define OPTSTRING "951yZDNLERKzowefnbvhdkqr:m:p:c:l:s:i:t:u:g:a:x:S:C:A:T:H:Q:I:B:F:G:O:M:X:V:U:j:P:J:W:Y:2:4:6:7:8:0:3:" /* options which don't have a one-char version */ #define LOPT_RELOAD 256 #define LOPT_NO_NAMES 257 #define LOPT_TFTP 258 #define LOPT_SECURE 259 #define LOPT_PREFIX 260 #define LOPT_PTR 261 #define LOPT_BRIDGE 262 #define LOPT_TFTP_MAX 263 #define LOPT_FORCE 264 #define LOPT_NOBLOCK 265 #define LOPT_LOG_OPTS 266 #define LOPT_MAX_LOGS 267 #define LOPT_CIRCUIT 268 #define LOPT_REMOTE 269 #define LOPT_SUBSCR 270 #define LOPT_INTNAME 271 #define LOPT_BANK 272 #define LOPT_DHCP_HOST 273 #define LOPT_APREF 274 #define LOPT_OVERRIDE 275 #define LOPT_TFTPPORTS 276 #define LOPT_REBIND 277 #define LOPT_NOLAST 278 #define LOPT_OPTS 279 #define LOPT_DHCP_OPTS 280 #define LOPT_MATCH 281 #define LOPT_BROADCAST 282 #define LOPT_NEGTTL 283 #define LOPT_ALTPORT 284 #define LOPT_SCRIPTUSR 285 #define LOPT_LOCAL 286 #define LOPT_NAPTR 287 #define LOPT_MINPORT 288 #define LOPT_DHCP_FQDN 289 #define LOPT_CNAME 290 #define LOPT_PXE_PROMT 291 #define LOPT_PXE_SERV 292 #define LOPT_TEST 293 #define LOPT_TAG_IF 294 #define LOPT_PROXY 295 #define LOPT_GEN_NAMES 296 #define LOPT_MAXTTL 297 #define LOPT_NO_REBIND 298 #define LOPT_LOC_REBND 299 #define LOPT_ADD_MAC 300 #define LOPT_DNSSEC 301 #define LOPT_INCR_ADDR 302 #define LOPT_CONNTRACK 303 #define LOPT_FQDN 304 #define LOPT_LUASCRIPT 305 #define LOPT_RA 306 #define LOPT_DUID 307 #define LOPT_HOST_REC 308 #define LOPT_TFTP_LC 309 #define LOPT_RR 310 #define LOPT_CLVERBIND 311 #define LOPT_MAXCTTL 312 #define LOPT_AUTHZONE 313 #define LOPT_AUTHSERV 314 #define LOPT_AUTHTTL 315 #define LOPT_AUTHSOA 316 #define LOPT_AUTHSFS 317 #define LOPT_AUTHPEER 318 #define LOPT_IPSET 319 #define LOPT_SYNTH 320 #define LOPT_RELAY 323 #define LOPT_RA_PARAM 324 #define LOPT_ADD_SBNET 325 #define LOPT_QUIET_DHCP 326 #define LOPT_QUIET_DHCP6 327 #define LOPT_QUIET_RA 328 #define LOPT_SEC_VALID 329 #define LOPT_TRUST_ANCHOR 330 #define LOPT_DNSSEC_DEBUG 331 #define LOPT_REV_SERV 332 #define LOPT_SERVERS_FILE 333 #define LOPT_DNSSEC_CHECK 334 #define LOPT_LOCAL_SERVICE 335 #define LOPT_DNSSEC_TIME 336 #define LOPT_LOOP_DETECT 337 #define LOPT_IGNORE_ADDR 338 #define LOPT_MINCTTL 339 #define LOPT_DHCP_INOTIFY 340 #define LOPT_DHOPT_INOTIFY 341 #define LOPT_HOST_INOTIFY 342 #define LOPT_DNSSEC_STAMP 343 #define LOPT_TFTP_NO_FAIL 344 #define LOPT_MAXPORT 345 #define LOPT_CPE_ID 346 #define LOPT_SCRIPT_ARP 347 #define LOPT_DHCPTTL 348 #define LOPT_TFTP_MTU 349 #define LOPT_REPLY_DELAY 350 #define LOPT_RAPID_COMMIT 351 #define LOPT_DUMPFILE 352 #define LOPT_DUMPMASK 353 #define LOPT_UBUS 354 #define LOPT_NAME_MATCH 355 #define LOPT_CAA 356 #define LOPT_SHARED_NET 357 #define LOPT_IGNORE_CLID 358 #define LOPT_SINGLE_PORT 359 #define LOPT_SCRIPT_TIME 360 #define LOPT_PXE_VENDOR 361 #define LOPT_DYNHOST 362 #define LOPT_LOG_DEBUG 363 #define LOPT_UMBRELLA 364 #define LOPT_CMARK_ALST_EN 365 #define LOPT_CMARK_ALST 366 #define LOPT_QUIET_TFTP 367 #ifdef HAVE_GETOPT_LONG static const struct option opts[] = #else static const struct myoption opts[] = #endif { { "version", 0, 0, 'v' }, { "no-hosts", 0, 0, 'h' }, { "no-poll", 0, 0, 'n' }, { "help", 0, 0, 'w' }, { "no-daemon", 0, 0, 'd' }, { "log-queries", 2, 0, 'q' }, { "user", 2, 0, 'u' }, { "group", 2, 0, 'g' }, { "resolv-file", 2, 0, 'r' }, { "servers-file", 1, 0, LOPT_SERVERS_FILE }, { "mx-host", 1, 0, 'm' }, { "mx-target", 1, 0, 't' }, { "cache-size", 2, 0, 'c' }, { "port", 1, 0, 'p' }, { "dhcp-leasefile", 2, 0, 'l' }, { "dhcp-lease", 1, 0, 'l' }, { "dhcp-host", 1, 0, 'G' }, { "dhcp-range", 1, 0, 'F' }, { "dhcp-option", 1, 0, 'O' }, { "dhcp-boot", 1, 0, 'M' }, { "domain", 1, 0, 's' }, { "domain-suffix", 1, 0, 's' }, { "interface", 1, 0, 'i' }, { "listen-address", 1, 0, 'a' }, { "local-service", 0, 0, LOPT_LOCAL_SERVICE }, { "bogus-priv", 0, 0, 'b' }, { "bogus-nxdomain", 1, 0, 'B' }, { "ignore-address", 1, 0, LOPT_IGNORE_ADDR }, { "selfmx", 0, 0, 'e' }, { "filterwin2k", 0, 0, 'f' }, { "pid-file", 2, 0, 'x' }, { "strict-order", 0, 0, 'o' }, { "server", 1, 0, 'S' }, { "rev-server", 1, 0, LOPT_REV_SERV }, { "local", 1, 0, LOPT_LOCAL }, { "address", 1, 0, 'A' }, { "conf-file", 2, 0, 'C' }, { "no-resolv", 0, 0, 'R' }, { "expand-hosts", 0, 0, 'E' }, { "localmx", 0, 0, 'L' }, { "local-ttl", 1, 0, 'T' }, { "no-negcache", 0, 0, 'N' }, { "addn-hosts", 1, 0, 'H' }, { "hostsdir", 1, 0, LOPT_HOST_INOTIFY }, { "query-port", 1, 0, 'Q' }, { "except-interface", 1, 0, 'I' }, { "no-dhcp-interface", 1, 0, '2' }, { "domain-needed", 0, 0, 'D' }, { "dhcp-lease-max", 1, 0, 'X' }, { "bind-interfaces", 0, 0, 'z' }, { "read-ethers", 0, 0, 'Z' }, { "alias", 1, 0, 'V' }, { "dhcp-vendorclass", 1, 0, 'U' }, { "dhcp-userclass", 1, 0, 'j' }, { "dhcp-ignore", 1, 0, 'J' }, { "edns-packet-max", 1, 0, 'P' }, { "keep-in-foreground", 0, 0, 'k' }, { "dhcp-authoritative", 0, 0, 'K' }, { "srv-host", 1, 0, 'W' }, { "localise-queries", 0, 0, 'y' }, { "txt-record", 1, 0, 'Y' }, { "caa-record", 1, 0 , LOPT_CAA }, { "dns-rr", 1, 0, LOPT_RR }, { "enable-dbus", 2, 0, '1' }, { "enable-ubus", 2, 0, LOPT_UBUS }, { "bootp-dynamic", 2, 0, '3' }, { "dhcp-mac", 1, 0, '4' }, { "no-ping", 0, 0, '5' }, { "dhcp-script", 1, 0, '6' }, { "conf-dir", 1, 0, '7' }, { "log-facility", 1, 0 ,'8' }, { "leasefile-ro", 0, 0, '9' }, { "script-on-renewal", 0, 0, LOPT_SCRIPT_TIME}, { "dns-forward-max", 1, 0, '0' }, { "clear-on-reload", 0, 0, LOPT_RELOAD }, { "dhcp-ignore-names", 2, 0, LOPT_NO_NAMES }, { "enable-tftp", 2, 0, LOPT_TFTP }, { "tftp-secure", 0, 0, LOPT_SECURE }, { "tftp-no-fail", 0, 0, LOPT_TFTP_NO_FAIL }, { "tftp-unique-root", 2, 0, LOPT_APREF }, { "tftp-root", 1, 0, LOPT_PREFIX }, { "tftp-max", 1, 0, LOPT_TFTP_MAX }, { "tftp-mtu", 1, 0, LOPT_TFTP_MTU }, { "tftp-lowercase", 0, 0, LOPT_TFTP_LC }, { "tftp-single-port", 0, 0, LOPT_SINGLE_PORT }, { "ptr-record", 1, 0, LOPT_PTR }, { "naptr-record", 1, 0, LOPT_NAPTR }, { "bridge-interface", 1, 0 , LOPT_BRIDGE }, { "shared-network", 1, 0, LOPT_SHARED_NET }, { "dhcp-option-force", 1, 0, LOPT_FORCE }, { "tftp-no-blocksize", 0, 0, LOPT_NOBLOCK }, { "log-dhcp", 0, 0, LOPT_LOG_OPTS }, { "log-async", 2, 0, LOPT_MAX_LOGS }, { "dhcp-circuitid", 1, 0, LOPT_CIRCUIT }, { "dhcp-remoteid", 1, 0, LOPT_REMOTE }, { "dhcp-subscrid", 1, 0, LOPT_SUBSCR }, { "dhcp-pxe-vendor", 1, 0, LOPT_PXE_VENDOR }, { "interface-name", 1, 0, LOPT_INTNAME }, { "dhcp-hostsfile", 1, 0, LOPT_DHCP_HOST }, { "dhcp-optsfile", 1, 0, LOPT_DHCP_OPTS }, { "dhcp-hostsdir", 1, 0, LOPT_DHCP_INOTIFY }, { "dhcp-optsdir", 1, 0, LOPT_DHOPT_INOTIFY }, { "dhcp-no-override", 0, 0, LOPT_OVERRIDE }, { "tftp-port-range", 1, 0, LOPT_TFTPPORTS }, { "stop-dns-rebind", 0, 0, LOPT_REBIND }, { "rebind-domain-ok", 1, 0, LOPT_NO_REBIND }, { "all-servers", 0, 0, LOPT_NOLAST }, { "dhcp-match", 1, 0, LOPT_MATCH }, { "dhcp-name-match", 1, 0, LOPT_NAME_MATCH }, { "dhcp-broadcast", 2, 0, LOPT_BROADCAST }, { "neg-ttl", 1, 0, LOPT_NEGTTL }, { "max-ttl", 1, 0, LOPT_MAXTTL }, { "min-cache-ttl", 1, 0, LOPT_MINCTTL }, { "max-cache-ttl", 1, 0, LOPT_MAXCTTL }, { "dhcp-alternate-port", 2, 0, LOPT_ALTPORT }, { "dhcp-scriptuser", 1, 0, LOPT_SCRIPTUSR }, { "min-port", 1, 0, LOPT_MINPORT }, { "max-port", 1, 0, LOPT_MAXPORT }, { "dhcp-fqdn", 0, 0, LOPT_DHCP_FQDN }, { "cname", 1, 0, LOPT_CNAME }, { "pxe-prompt", 1, 0, LOPT_PXE_PROMT }, { "pxe-service", 1, 0, LOPT_PXE_SERV }, { "test", 0, 0, LOPT_TEST }, { "tag-if", 1, 0, LOPT_TAG_IF }, { "dhcp-proxy", 2, 0, LOPT_PROXY }, { "dhcp-generate-names", 2, 0, LOPT_GEN_NAMES }, { "rebind-localhost-ok", 0, 0, LOPT_LOC_REBND }, { "add-mac", 2, 0, LOPT_ADD_MAC }, { "add-subnet", 2, 0, LOPT_ADD_SBNET }, { "add-cpe-id", 1, 0 , LOPT_CPE_ID }, { "proxy-dnssec", 0, 0, LOPT_DNSSEC }, { "dhcp-sequential-ip", 0, 0, LOPT_INCR_ADDR }, { "conntrack", 0, 0, LOPT_CONNTRACK }, { "dhcp-client-update", 0, 0, LOPT_FQDN }, { "dhcp-luascript", 1, 0, LOPT_LUASCRIPT }, { "enable-ra", 0, 0, LOPT_RA }, { "dhcp-duid", 1, 0, LOPT_DUID }, { "host-record", 1, 0, LOPT_HOST_REC }, { "bind-dynamic", 0, 0, LOPT_CLVERBIND }, { "auth-zone", 1, 0, LOPT_AUTHZONE }, { "auth-server", 1, 0, LOPT_AUTHSERV }, { "auth-ttl", 1, 0, LOPT_AUTHTTL }, { "auth-soa", 1, 0, LOPT_AUTHSOA }, { "auth-sec-servers", 1, 0, LOPT_AUTHSFS }, { "auth-peer", 1, 0, LOPT_AUTHPEER }, { "ipset", 1, 0, LOPT_IPSET }, { "connmark-allowlist-enable", 2, 0, LOPT_CMARK_ALST_EN }, { "connmark-allowlist", 1, 0, LOPT_CMARK_ALST }, { "synth-domain", 1, 0, LOPT_SYNTH }, { "dnssec", 0, 0, LOPT_SEC_VALID }, { "trust-anchor", 1, 0, LOPT_TRUST_ANCHOR }, { "dnssec-debug", 0, 0, LOPT_DNSSEC_DEBUG }, { "dnssec-check-unsigned", 2, 0, LOPT_DNSSEC_CHECK }, { "dnssec-no-timecheck", 0, 0, LOPT_DNSSEC_TIME }, { "dnssec-timestamp", 1, 0, LOPT_DNSSEC_STAMP }, { "dhcp-relay", 1, 0, LOPT_RELAY }, { "ra-param", 1, 0, LOPT_RA_PARAM }, { "quiet-dhcp", 0, 0, LOPT_QUIET_DHCP }, { "quiet-dhcp6", 0, 0, LOPT_QUIET_DHCP6 }, { "quiet-ra", 0, 0, LOPT_QUIET_RA }, { "dns-loop-detect", 0, 0, LOPT_LOOP_DETECT }, { "script-arp", 0, 0, LOPT_SCRIPT_ARP }, { "dhcp-ttl", 1, 0 , LOPT_DHCPTTL }, { "dhcp-reply-delay", 1, 0, LOPT_REPLY_DELAY }, { "dhcp-rapid-commit", 0, 0, LOPT_RAPID_COMMIT }, { "dumpfile", 1, 0, LOPT_DUMPFILE }, { "dumpmask", 1, 0, LOPT_DUMPMASK }, { "dhcp-ignore-clid", 0, 0, LOPT_IGNORE_CLID }, { "dynamic-host", 1, 0, LOPT_DYNHOST }, { "log-debug", 0, 0, LOPT_LOG_DEBUG }, { "umbrella", 2, 0, LOPT_UMBRELLA }, { "quiet-tftp", 0, 0, LOPT_QUIET_TFTP }, { NULL, 0, 0, 0 } }; #define ARG_DUP OPT_LAST #define ARG_ONE OPT_LAST + 1 #define ARG_USED_CL OPT_LAST + 2 #define ARG_USED_FILE OPT_LAST + 3 static struct { int opt; unsigned int rept; char * const flagdesc; char * const desc; char * const arg; } usage[] = { { 'a', ARG_DUP, "", gettext_noop("Specify local address(es) to listen on."), NULL }, { 'A', ARG_DUP, "//", gettext_noop("Return ipaddr for all hosts in specified domains."), NULL }, { 'b', OPT_BOGUSPRIV, NULL, gettext_noop("Fake reverse lookups for RFC1918 private address ranges."), NULL }, { 'B', ARG_DUP, "", gettext_noop("Treat ipaddr as NXDOMAIN (defeats Verisign wildcard)."), NULL }, { 'c', ARG_ONE, "", gettext_noop("Specify the size of the cache in entries (defaults to %s)."), "$" }, { 'C', ARG_DUP, "", gettext_noop("Specify configuration file (defaults to %s)."), CONFFILE }, { 'd', OPT_DEBUG, NULL, gettext_noop("Do NOT fork into the background: run in debug mode."), NULL }, { 'D', OPT_NODOTS_LOCAL, NULL, gettext_noop("Do NOT forward queries with no domain part."), NULL }, { 'e', OPT_SELFMX, NULL, gettext_noop("Return self-pointing MX records for local hosts."), NULL }, { 'E', OPT_EXPAND, NULL, gettext_noop("Expand simple names in /etc/hosts with domain-suffix."), NULL }, { 'f', OPT_FILTER, NULL, gettext_noop("Don't forward spurious DNS requests from Windows hosts."), NULL }, { 'F', ARG_DUP, ",...", gettext_noop("Enable DHCP in the range given with lease duration."), NULL }, { 'g', ARG_ONE, "", gettext_noop("Change to this group after startup (defaults to %s)."), CHGRP }, { 'G', ARG_DUP, "", gettext_noop("Set address or hostname for a specified machine."), NULL }, { LOPT_DHCP_HOST, ARG_DUP, "", gettext_noop("Read DHCP host specs from file."), NULL }, { LOPT_DHCP_OPTS, ARG_DUP, "", gettext_noop("Read DHCP option specs from file."), NULL }, { LOPT_DHCP_INOTIFY, ARG_DUP, "", gettext_noop("Read DHCP host specs from a directory."), NULL }, { LOPT_DHOPT_INOTIFY, ARG_DUP, "", gettext_noop("Read DHCP options from a directory."), NULL }, { LOPT_TAG_IF, ARG_DUP, "tag-expression", gettext_noop("Evaluate conditional tag expression."), NULL }, { 'h', OPT_NO_HOSTS, NULL, gettext_noop("Do NOT load %s file."), HOSTSFILE }, { 'H', ARG_DUP, "", gettext_noop("Specify a hosts file to be read in addition to %s."), HOSTSFILE }, { LOPT_HOST_INOTIFY, ARG_DUP, "", gettext_noop("Read hosts files from a directory."), NULL }, { 'i', ARG_DUP, "", gettext_noop("Specify interface(s) to listen on."), NULL }, { 'I', ARG_DUP, "", gettext_noop("Specify interface(s) NOT to listen on.") , NULL }, { 'j', ARG_DUP, "set:,", gettext_noop("Map DHCP user class to tag."), NULL }, { LOPT_CIRCUIT, ARG_DUP, "set:,", gettext_noop("Map RFC3046 circuit-id to tag."), NULL }, { LOPT_REMOTE, ARG_DUP, "set:,", gettext_noop("Map RFC3046 remote-id to tag."), NULL }, { LOPT_SUBSCR, ARG_DUP, "set:,", gettext_noop("Map RFC3993 subscriber-id to tag."), NULL }, { LOPT_PXE_VENDOR, ARG_DUP, "[,...]", gettext_noop("Specify vendor class to match for PXE requests."), NULL }, { 'J', ARG_DUP, "tag:...", gettext_noop("Don't do DHCP for hosts with tag set."), NULL }, { LOPT_BROADCAST, ARG_DUP, "[=tag:...]", gettext_noop("Force broadcast replies for hosts with tag set."), NULL }, { 'k', OPT_NO_FORK, NULL, gettext_noop("Do NOT fork into the background, do NOT run in debug mode."), NULL }, { 'K', OPT_AUTHORITATIVE, NULL, gettext_noop("Assume we are the only DHCP server on the local network."), NULL }, { 'l', ARG_ONE, "", gettext_noop("Specify where to store DHCP leases (defaults to %s)."), LEASEFILE }, { 'L', OPT_LOCALMX, NULL, gettext_noop("Return MX records for local hosts."), NULL }, { 'm', ARG_DUP, ",,", gettext_noop("Specify an MX record."), NULL }, { 'M', ARG_DUP, "", gettext_noop("Specify BOOTP options to DHCP server."), NULL }, { 'n', OPT_NO_POLL, NULL, gettext_noop("Do NOT poll %s file, reload only on SIGHUP."), RESOLVFILE }, { 'N', OPT_NO_NEG, NULL, gettext_noop("Do NOT cache failed search results."), NULL }, { 'o', OPT_ORDER, NULL, gettext_noop("Use nameservers strictly in the order given in %s."), RESOLVFILE }, { 'O', ARG_DUP, "", gettext_noop("Specify options to be sent to DHCP clients."), NULL }, { LOPT_FORCE, ARG_DUP, "", gettext_noop("DHCP option sent even if the client does not request it."), NULL}, { 'p', ARG_ONE, "", gettext_noop("Specify port to listen for DNS requests on (defaults to 53)."), NULL }, { 'P', ARG_ONE, "", gettext_noop("Maximum supported UDP packet size for EDNS.0 (defaults to %s)."), "*" }, { 'q', ARG_DUP, NULL, gettext_noop("Log DNS queries."), NULL }, { 'Q', ARG_ONE, "", gettext_noop("Force the originating port for upstream DNS queries."), NULL }, { 'R', OPT_NO_RESOLV, NULL, gettext_noop("Do NOT read resolv.conf."), NULL }, { 'r', ARG_DUP, "", gettext_noop("Specify path to resolv.conf (defaults to %s)."), RESOLVFILE }, { LOPT_SERVERS_FILE, ARG_ONE, "", gettext_noop("Specify path to file with server= options"), NULL }, { 'S', ARG_DUP, "//", gettext_noop("Specify address(es) of upstream servers with optional domains."), NULL }, { LOPT_REV_SERV, ARG_DUP, "/,", gettext_noop("Specify address of upstream servers for reverse address queries"), NULL }, { LOPT_LOCAL, ARG_DUP, "//", gettext_noop("Never forward queries to specified domains."), NULL }, { 's', ARG_DUP, "[,]", gettext_noop("Specify the domain to be assigned in DHCP leases."), NULL }, { 't', ARG_ONE, "", gettext_noop("Specify default target in an MX record."), NULL }, { 'T', ARG_ONE, "", gettext_noop("Specify time-to-live in seconds for replies from /etc/hosts."), NULL }, { LOPT_NEGTTL, ARG_ONE, "", gettext_noop("Specify time-to-live in seconds for negative caching."), NULL }, { LOPT_MAXTTL, ARG_ONE, "", gettext_noop("Specify time-to-live in seconds for maximum TTL to send to clients."), NULL }, { LOPT_MAXCTTL, ARG_ONE, "", gettext_noop("Specify time-to-live ceiling for cache."), NULL }, { LOPT_MINCTTL, ARG_ONE, "", gettext_noop("Specify time-to-live floor for cache."), NULL }, { 'u', ARG_ONE, "", gettext_noop("Change to this user after startup. (defaults to %s)."), CHUSER }, { 'U', ARG_DUP, "set:,", gettext_noop("Map DHCP vendor class to tag."), NULL }, { 'v', 0, NULL, gettext_noop("Display dnsmasq version and copyright information."), NULL }, { 'V', ARG_DUP, ",,", gettext_noop("Translate IPv4 addresses from upstream servers."), NULL }, { 'W', ARG_DUP, ",,...", gettext_noop("Specify a SRV record."), NULL }, { 'w', 0, NULL, gettext_noop("Display this message. Use --help dhcp or --help dhcp6 for known DHCP options."), NULL }, { 'x', ARG_ONE, "", gettext_noop("Specify path of PID file (defaults to %s)."), RUNFILE }, { 'X', ARG_ONE, "", gettext_noop("Specify maximum number of DHCP leases (defaults to %s)."), "&" }, { 'y', OPT_LOCALISE, NULL, gettext_noop("Answer DNS queries based on the interface a query was sent to."), NULL }, { 'Y', ARG_DUP, ",[,,", gettext_noop("Specify PTR DNS record."), NULL }, { LOPT_INTNAME, ARG_DUP, ",", gettext_noop("Give DNS name to IPv4 address of interface."), NULL }, { 'z', OPT_NOWILD, NULL, gettext_noop("Bind only to interfaces in use."), NULL }, { 'Z', OPT_ETHERS, NULL, gettext_noop("Read DHCP static host information from %s."), ETHERSFILE }, { '1', ARG_ONE, "[=]", gettext_noop("Enable the DBus interface for setting upstream servers, etc."), NULL }, { LOPT_UBUS, ARG_ONE, "[=]", gettext_noop("Enable the UBus interface."), NULL }, { '2', ARG_DUP, "", gettext_noop("Do not provide DHCP on this interface, only provide DNS."), NULL }, { '3', ARG_DUP, "[=tag:]...", gettext_noop("Enable dynamic address allocation for bootp."), NULL }, { '4', ARG_DUP, "set:,", gettext_noop("Map MAC address (with wildcards) to option set."), NULL }, { LOPT_BRIDGE, ARG_DUP, ",..", gettext_noop("Treat DHCP requests on aliases as arriving from interface."), NULL }, { LOPT_SHARED_NET, ARG_DUP, "|,", gettext_noop("Specify extra networks sharing a broadcast domain for DHCP"), NULL}, { '5', OPT_NO_PING, NULL, gettext_noop("Disable ICMP echo address checking in the DHCP server."), NULL }, { '6', ARG_ONE, "", gettext_noop("Shell script to run on DHCP lease creation and destruction."), NULL }, { LOPT_LUASCRIPT, ARG_DUP, "path", gettext_noop("Lua script to run on DHCP lease creation and destruction."), NULL }, { LOPT_SCRIPTUSR, ARG_ONE, "", gettext_noop("Run lease-change scripts as this user."), NULL }, { LOPT_SCRIPT_ARP, OPT_SCRIPT_ARP, NULL, gettext_noop("Call dhcp-script with changes to local ARP table."), NULL }, { '7', ARG_DUP, "", gettext_noop("Read configuration from all the files in this directory."), NULL }, { '8', ARG_ONE, "|", gettext_noop("Log to this syslog facility or file. (defaults to DAEMON)"), NULL }, { '9', OPT_LEASE_RO, NULL, gettext_noop("Do not use leasefile."), NULL }, { '0', ARG_ONE, "", gettext_noop("Maximum number of concurrent DNS queries. (defaults to %s)"), "!" }, { LOPT_RELOAD, OPT_RELOAD, NULL, gettext_noop("Clear DNS cache when reloading %s."), RESOLVFILE }, { LOPT_NO_NAMES, ARG_DUP, "[=tag:]...", gettext_noop("Ignore hostnames provided by DHCP clients."), NULL }, { LOPT_OVERRIDE, OPT_NO_OVERRIDE, NULL, gettext_noop("Do NOT reuse filename and server fields for extra DHCP options."), NULL }, { LOPT_TFTP, ARG_DUP, "[=[,]]", gettext_noop("Enable integrated read-only TFTP server."), NULL }, { LOPT_PREFIX, ARG_DUP, "[,]", gettext_noop("Export files by TFTP only from the specified subtree."), NULL }, { LOPT_APREF, ARG_DUP, "[=ip|mac]", gettext_noop("Add client IP or hardware address to tftp-root."), NULL }, { LOPT_SECURE, OPT_TFTP_SECURE, NULL, gettext_noop("Allow access only to files owned by the user running dnsmasq."), NULL }, { LOPT_TFTP_NO_FAIL, OPT_TFTP_NO_FAIL, NULL, gettext_noop("Do not terminate the service if TFTP directories are inaccessible."), NULL }, { LOPT_TFTP_MAX, ARG_ONE, "", gettext_noop("Maximum number of concurrent TFTP transfers (defaults to %s)."), "#" }, { LOPT_TFTP_MTU, ARG_ONE, "", gettext_noop("Maximum MTU to use for TFTP transfers."), NULL }, { LOPT_NOBLOCK, OPT_TFTP_NOBLOCK, NULL, gettext_noop("Disable the TFTP blocksize extension."), NULL }, { LOPT_TFTP_LC, OPT_TFTP_LC, NULL, gettext_noop("Convert TFTP filenames to lowercase"), NULL }, { LOPT_TFTPPORTS, ARG_ONE, ",", gettext_noop("Ephemeral port range for use by TFTP transfers."), NULL }, { LOPT_SINGLE_PORT, OPT_SINGLE_PORT, NULL, gettext_noop("Use only one port for TFTP server."), NULL }, { LOPT_LOG_OPTS, OPT_LOG_OPTS, NULL, gettext_noop("Extra logging for DHCP."), NULL }, { LOPT_MAX_LOGS, ARG_ONE, "[=]", gettext_noop("Enable async. logging; optionally set queue length."), NULL }, { LOPT_REBIND, OPT_NO_REBIND, NULL, gettext_noop("Stop DNS rebinding. Filter private IP ranges when resolving."), NULL }, { LOPT_LOC_REBND, OPT_LOCAL_REBIND, NULL, gettext_noop("Allow rebinding of 127.0.0.0/8, for RBL servers."), NULL }, { LOPT_NO_REBIND, ARG_DUP, "//", gettext_noop("Inhibit DNS-rebind protection on this domain."), NULL }, { LOPT_NOLAST, OPT_ALL_SERVERS, NULL, gettext_noop("Always perform DNS queries to all servers."), NULL }, { LOPT_MATCH, ARG_DUP, "set:,", gettext_noop("Set tag if client includes matching option in request."), NULL }, { LOPT_NAME_MATCH, ARG_DUP, "set:,[*]", gettext_noop("Set tag if client provides given name."), NULL }, { LOPT_ALTPORT, ARG_ONE, "[=]", gettext_noop("Use alternative ports for DHCP."), NULL }, { LOPT_NAPTR, ARG_DUP, ",", gettext_noop("Specify NAPTR DNS record."), NULL }, { LOPT_MINPORT, ARG_ONE, "", gettext_noop("Specify lowest port available for DNS query transmission."), NULL }, { LOPT_MAXPORT, ARG_ONE, "", gettext_noop("Specify highest port available for DNS query transmission."), NULL }, { LOPT_DHCP_FQDN, OPT_DHCP_FQDN, NULL, gettext_noop("Use only fully qualified domain names for DHCP clients."), NULL }, { LOPT_GEN_NAMES, ARG_DUP, "[=tag:]", gettext_noop("Generate hostnames based on MAC address for nameless clients."), NULL}, { LOPT_PROXY, ARG_DUP, "[=]...", gettext_noop("Use these DHCP relays as full proxies."), NULL }, { LOPT_RELAY, ARG_DUP, ",[,]", gettext_noop("Relay DHCP requests to a remote server"), NULL}, { LOPT_CNAME, ARG_DUP, ",[,]", gettext_noop("Specify alias name for LOCAL DNS name."), NULL }, { LOPT_PXE_PROMT, ARG_DUP, ",[]", gettext_noop("Prompt to send to PXE clients."), NULL }, { LOPT_PXE_SERV, ARG_DUP, "", gettext_noop("Boot service for PXE menu."), NULL }, { LOPT_TEST, 0, NULL, gettext_noop("Check configuration syntax."), NULL }, { LOPT_ADD_MAC, ARG_DUP, "[=base64|text]", gettext_noop("Add requestor's MAC address to forwarded DNS queries."), NULL }, { LOPT_ADD_SBNET, ARG_ONE, "[,]", gettext_noop("Add specified IP subnet to forwarded DNS queries."), NULL }, { LOPT_CPE_ID, ARG_ONE, "", gettext_noop("Add client identification to forwarded DNS queries."), NULL }, { LOPT_DNSSEC, OPT_DNSSEC_PROXY, NULL, gettext_noop("Proxy DNSSEC validation results from upstream nameservers."), NULL }, { LOPT_INCR_ADDR, OPT_CONSEC_ADDR, NULL, gettext_noop("Attempt to allocate sequential IP addresses to DHCP clients."), NULL }, { LOPT_IGNORE_CLID, OPT_IGNORE_CLID, NULL, gettext_noop("Ignore client identifier option sent by DHCP clients."), NULL }, { LOPT_CONNTRACK, OPT_CONNTRACK, NULL, gettext_noop("Copy connection-track mark from queries to upstream connections."), NULL }, { LOPT_FQDN, OPT_FQDN_UPDATE, NULL, gettext_noop("Allow DHCP clients to do their own DDNS updates."), NULL }, { LOPT_RA, OPT_RA, NULL, gettext_noop("Send router-advertisements for interfaces doing DHCPv6"), NULL }, { LOPT_DUID, ARG_ONE, ",", gettext_noop("Specify DUID_EN-type DHCPv6 server DUID"), NULL }, { LOPT_HOST_REC, ARG_DUP, ",
[,]", gettext_noop("Specify host (A/AAAA and PTR) records"), NULL }, { LOPT_DYNHOST, ARG_DUP, ",[][,],", gettext_noop("Specify host record in interface subnet"), NULL }, { LOPT_CAA, ARG_DUP, ",,,", gettext_noop("Specify certification authority authorization record"), NULL }, { LOPT_RR, ARG_DUP, ",,[]", gettext_noop("Specify arbitrary DNS resource record"), NULL }, { LOPT_CLVERBIND, OPT_CLEVERBIND, NULL, gettext_noop("Bind to interfaces in use - check for new interfaces"), NULL }, { LOPT_AUTHSERV, ARG_ONE, ",", gettext_noop("Export local names to global DNS"), NULL }, { LOPT_AUTHZONE, ARG_DUP, ",[...]", gettext_noop("Domain to export to global DNS"), NULL }, { LOPT_AUTHTTL, ARG_ONE, "", gettext_noop("Set TTL for authoritative replies"), NULL }, { LOPT_AUTHSOA, ARG_ONE, "[,...]", gettext_noop("Set authoritative zone information"), NULL }, { LOPT_AUTHSFS, ARG_DUP, "[,...]", gettext_noop("Secondary authoritative nameservers for forward domains"), NULL }, { LOPT_AUTHPEER, ARG_DUP, "[,...]", gettext_noop("Peers which are allowed to do zone transfer"), NULL }, { LOPT_IPSET, ARG_DUP, "/[/...]/...", gettext_noop("Specify ipsets to which matching domains should be added"), NULL }, { LOPT_CMARK_ALST_EN, ARG_ONE, "[=]", gettext_noop("Enable filtering of DNS queries with connection-track marks."), NULL }, { LOPT_CMARK_ALST, ARG_DUP, "[/][,[/...]]", gettext_noop("Set allowed DNS patterns for a connection-track mark."), NULL }, { LOPT_SYNTH, ARG_DUP, ",,[]", gettext_noop("Specify a domain and address range for synthesised names"), NULL }, { LOPT_SEC_VALID, OPT_DNSSEC_VALID, NULL, gettext_noop("Activate DNSSEC validation"), NULL }, { LOPT_TRUST_ANCHOR, ARG_DUP, ",[],...", gettext_noop("Specify trust anchor key digest."), NULL }, { LOPT_DNSSEC_DEBUG, OPT_DNSSEC_DEBUG, NULL, gettext_noop("Disable upstream checking for DNSSEC debugging."), NULL }, { LOPT_DNSSEC_CHECK, ARG_DUP, NULL, gettext_noop("Ensure answers without DNSSEC are in unsigned zones."), NULL }, { LOPT_DNSSEC_TIME, OPT_DNSSEC_TIME, NULL, gettext_noop("Don't check DNSSEC signature timestamps until first cache-reload"), NULL }, { LOPT_DNSSEC_STAMP, ARG_ONE, "", gettext_noop("Timestamp file to verify system clock for DNSSEC"), NULL }, { LOPT_RA_PARAM, ARG_DUP, ",[mtu:||off,][,][,]", gettext_noop("Set MTU, priority, resend-interval and router-lifetime"), NULL }, { LOPT_QUIET_DHCP, OPT_QUIET_DHCP, NULL, gettext_noop("Do not log routine DHCP."), NULL }, { LOPT_QUIET_DHCP6, OPT_QUIET_DHCP6, NULL, gettext_noop("Do not log routine DHCPv6."), NULL }, { LOPT_QUIET_RA, OPT_QUIET_RA, NULL, gettext_noop("Do not log RA."), NULL }, { LOPT_LOG_DEBUG, OPT_LOG_DEBUG, NULL, gettext_noop("Log debugging information."), NULL }, { LOPT_LOCAL_SERVICE, OPT_LOCAL_SERVICE, NULL, gettext_noop("Accept queries only from directly-connected networks."), NULL }, { LOPT_LOOP_DETECT, OPT_LOOP_DETECT, NULL, gettext_noop("Detect and remove DNS forwarding loops."), NULL }, { LOPT_IGNORE_ADDR, ARG_DUP, "", gettext_noop("Ignore DNS responses containing ipaddr."), NULL }, { LOPT_DHCPTTL, ARG_ONE, "", gettext_noop("Set TTL in DNS responses with DHCP-derived addresses."), NULL }, { LOPT_REPLY_DELAY, ARG_ONE, "", gettext_noop("Delay DHCP replies for at least number of seconds."), NULL }, { LOPT_RAPID_COMMIT, OPT_RAPID_COMMIT, NULL, gettext_noop("Enables DHCPv4 Rapid Commit option."), NULL }, { LOPT_DUMPFILE, ARG_ONE, "", gettext_noop("Path to debug packet dump file"), NULL }, { LOPT_DUMPMASK, ARG_ONE, "", gettext_noop("Mask which packets to dump"), NULL }, { LOPT_SCRIPT_TIME, OPT_LEASE_RENEW, NULL, gettext_noop("Call dhcp-script when lease expiry changes."), NULL }, { LOPT_UMBRELLA, ARG_ONE, "[=]", gettext_noop("Send Cisco Umbrella identifiers including remote IP."), NULL }, { LOPT_QUIET_TFTP, OPT_QUIET_TFTP, NULL, gettext_noop("Do not log routine TFTP."), NULL }, { 0, 0, NULL, NULL, NULL } }; /* We hide metacharacters in quoted strings by mapping them into the ASCII control character space. Note that the \0, \t \b \r \033 and \n characters are carefully placed in the following sequence so that they map to themselves: it is therefore possible to call unhide_metas repeatedly on string without breaking things. The transformation gets undone by opt_canonicalise, atoi_check and opt_string_alloc, and a couple of other places. Note that space is included here so that --dhcp-option=3, string has five characters, whilst --dhcp-option=3," string" has six. */ static const char meta[] = "\000123456 \b\t\n78\r90abcdefABCDE\033F:,."; static char hide_meta(char c) { unsigned int i; for (i = 0; i < (sizeof(meta) - 1); i++) if (c == meta[i]) return (char)i; return c; } static char unhide_meta(char cr) { unsigned int c = cr; if (c < (sizeof(meta) - 1)) cr = meta[c]; return cr; } static void unhide_metas(char *cp) { if (cp) for(; *cp; cp++) *cp = unhide_meta(*cp); } static void *opt_malloc(size_t size) { void *ret; if (mem_recover) { ret = whine_malloc(size); if (!ret) longjmp(mem_jmp, 1); } else ret = safe_malloc(size); return ret; } static char *opt_string_alloc(const char *cp) { char *ret = NULL; size_t len; if (cp && (len = strlen(cp)) != 0) { ret = opt_malloc(len+1); memcpy(ret, cp, len+1); /* restore hidden metachars */ unhide_metas(ret); } return ret; } /* find next comma, split string with zero and eliminate spaces. return start of string following comma */ static char *split_chr(char *s, char c) { char *comma, *p; if (!s || !(comma = strchr(s, c))) return NULL; p = comma; *comma = ' '; for (; *comma == ' '; comma++); for (; (p >= s) && *p == ' '; p--) *p = 0; return comma; } static char *split(char *s) { return split_chr(s, ','); } static char *canonicalise_opt(char *s) { char *ret; int nomem; if (!s) return 0; if (strlen(s) == 0) return opt_string_alloc(""); unhide_metas(s); if (!(ret = canonicalise(s, &nomem)) && nomem) { if (mem_recover) longjmp(mem_jmp, 1); else die(_("could not get memory"), NULL, EC_NOMEM); } return ret; } static int numeric_check(char *a) { char *p; if (!a) return 0; unhide_metas(a); for (p = a; *p; p++) if (*p < '0' || *p > '9') return 0; return 1; } static int atoi_check(char *a, int *res) { if (!numeric_check(a)) return 0; *res = atoi(a); return 1; } static int strtoul_check(char *a, u32 *res) { unsigned long x; if (!numeric_check(a)) return 0; x = strtoul(a, NULL, 10); if (errno || x > UINT32_MAX) { errno = 0; return 0; } *res = (u32)x; return 1; } static int atoi_check16(char *a, int *res) { if (!(atoi_check(a, res)) || *res < 0 || *res > 0xffff) return 0; return 1; } #ifdef HAVE_DNSSEC static int atoi_check8(char *a, int *res) { if (!(atoi_check(a, res)) || *res < 0 || *res > 0xff) return 0; return 1; } #endif #ifndef NO_ID static void add_txt(char *name, char *txt, int stat) { struct txt_record *r = opt_malloc(sizeof(struct txt_record)); if (txt) { size_t len = strlen(txt); r->txt = opt_malloc(len+1); r->len = len+1; *(r->txt) = len; memcpy((r->txt)+1, txt, len); } r->stat = stat; r->name = opt_string_alloc(name); r->next = daemon->txt; daemon->txt = r; r->class = C_CHAOS; } #endif static void do_usage(void) { char buff[100]; int i, j; struct { char handle; int val; } tab[] = { { '$', CACHESIZ }, { '*', EDNS_PKTSZ }, { '&', MAXLEASES }, { '!', FTABSIZ }, { '#', TFTP_MAX_CONNECTIONS }, { '\0', 0 } }; printf(_("Usage: dnsmasq [options]\n\n")); #ifndef HAVE_GETOPT_LONG printf(_("Use short options only on the command line.\n")); #endif printf(_("Valid options are:\n")); for (i = 0; usage[i].opt != 0; i++) { char *desc = usage[i].flagdesc; char *eq = "="; if (!desc || *desc == '[') eq = ""; if (!desc) desc = ""; for ( j = 0; opts[j].name; j++) if (opts[j].val == usage[i].opt) break; if (usage[i].opt < 256) sprintf(buff, "-%c, ", usage[i].opt); else sprintf(buff, " "); sprintf(buff+4, "--%s%s%s", opts[j].name, eq, desc); printf("%-55.55s", buff); if (usage[i].arg) { strcpy(buff, usage[i].arg); for (j = 0; tab[j].handle; j++) if (tab[j].handle == *(usage[i].arg)) sprintf(buff, "%d", tab[j].val); } printf(_(usage[i].desc), buff); printf("\n"); } } #define ret_err(x) do { strcpy(errstr, (x)); return 0; } while (0) #define ret_err_free(x,m) do { strcpy(errstr, (x)); free((m)); return 0; } while (0) #define goto_err(x) do { strcpy(errstr, (x)); goto on_error; } while (0) static char *parse_mysockaddr(char *arg, union mysockaddr *addr) { if (inet_pton(AF_INET, arg, &addr->in.sin_addr) > 0) addr->sa.sa_family = AF_INET; else if (inet_pton(AF_INET6, arg, &addr->in6.sin6_addr) > 0) addr->sa.sa_family = AF_INET6; else return _("bad address"); return NULL; } char *parse_server(char *arg, union mysockaddr *addr, union mysockaddr *source_addr, char *interface, u16 *flags) { int source_port = 0, serv_port = NAMESERVER_PORT; char *portno, *source; char *interface_opt = NULL; int scope_index = 0; char *scope_id; *interface = 0; if (strcmp(arg, "#") == 0) { if (flags) *flags |= SERV_USE_RESOLV; return NULL; } if ((source = split_chr(arg, '@')) && /* is there a source. */ (portno = split_chr(source, '#')) && !atoi_check16(portno, &source_port)) return _("bad port"); if ((portno = split_chr(arg, '#')) && /* is there a port no. */ !atoi_check16(portno, &serv_port)) return _("bad port"); scope_id = split_chr(arg, '%'); if (source) { interface_opt = split_chr(source, '@'); if (interface_opt) { #if defined(SO_BINDTODEVICE) safe_strncpy(interface, source, IF_NAMESIZE); source = interface_opt; #else return _("interface binding not supported"); #endif } } if (inet_pton(AF_INET, arg, &addr->in.sin_addr) > 0) { addr->in.sin_port = htons(serv_port); addr->sa.sa_family = source_addr->sa.sa_family = AF_INET; #ifdef HAVE_SOCKADDR_SA_LEN source_addr->in.sin_len = addr->in.sin_len = sizeof(struct sockaddr_in); #endif source_addr->in.sin_addr.s_addr = INADDR_ANY; source_addr->in.sin_port = htons(daemon->query_port); if (source) { if (flags) *flags |= SERV_HAS_SOURCE; source_addr->in.sin_port = htons(source_port); if (!(inet_pton(AF_INET, source, &source_addr->in.sin_addr) > 0)) { #if defined(SO_BINDTODEVICE) if (interface_opt) return _("interface can only be specified once"); source_addr->in.sin_addr.s_addr = INADDR_ANY; safe_strncpy(interface, source, IF_NAMESIZE); #else return _("interface binding not supported"); #endif } } } else if (inet_pton(AF_INET6, arg, &addr->in6.sin6_addr) > 0) { if (scope_id && (scope_index = if_nametoindex(scope_id)) == 0) return _("bad interface name"); addr->in6.sin6_port = htons(serv_port); addr->in6.sin6_scope_id = scope_index; source_addr->in6.sin6_addr = in6addr_any; source_addr->in6.sin6_port = htons(daemon->query_port); source_addr->in6.sin6_scope_id = 0; addr->sa.sa_family = source_addr->sa.sa_family = AF_INET6; addr->in6.sin6_flowinfo = source_addr->in6.sin6_flowinfo = 0; #ifdef HAVE_SOCKADDR_SA_LEN addr->in6.sin6_len = source_addr->in6.sin6_len = sizeof(addr->in6); #endif if (source) { if (flags) *flags |= SERV_HAS_SOURCE; source_addr->in6.sin6_port = htons(source_port); if (inet_pton(AF_INET6, source, &source_addr->in6.sin6_addr) == 0) { #if defined(SO_BINDTODEVICE) if (interface_opt) return _("interface can only be specified once"); source_addr->in6.sin6_addr = in6addr_any; safe_strncpy(interface, source, IF_NAMESIZE); #else return _("interface binding not supported"); #endif } } } else return _("bad address"); return NULL; } static int domain_rev4(char *domain, struct in_addr addr, int msize) { in_addr_t a = ntohl(addr.s_addr); *domain = 0; switch (msize) { case 32: domain += sprintf(domain, "%u.", a & 0xff); /* fall through */ case 24: domain += sprintf(domain, "%d.", (a >> 8) & 0xff); /* fall through */ case 16: domain += sprintf(domain, "%d.", (a >> 16) & 0xff); /* fall through */ case 8: domain += sprintf(domain, "%d.", (a >> 24) & 0xff); break; default: return 0; } domain += sprintf(domain, "in-addr.arpa"); return 1; } static int domain_rev6(char *domain, struct in6_addr *addr, int msize) { int i; if (msize > 128 || msize%4) return 0; *domain = 0; for (i = msize-1; i >= 0; i -= 4) { int dig = ((unsigned char *)addr)[i>>3]; domain += sprintf(domain, "%.1x.", (i>>2) & 1 ? dig & 15 : dig >> 4); } domain += sprintf(domain, "ip6.arpa"); return 1; } #ifdef HAVE_DHCP static int is_tag_prefix(char *arg) { if (arg && (strstr(arg, "net:") == arg || strstr(arg, "tag:") == arg)) return 1; return 0; } static char *set_prefix(char *arg) { if (strstr(arg, "set:") == arg) return arg+4; return arg; } static struct dhcp_netid *dhcp_netid_create(const char *net, struct dhcp_netid *next) { struct dhcp_netid *tt; tt = opt_malloc(sizeof (struct dhcp_netid)); tt->net = opt_string_alloc(net); tt->next = next; return tt; } static void dhcp_netid_free(struct dhcp_netid *nid) { while (nid) { struct dhcp_netid *tmp = nid; nid = nid->next; free(tmp->net); free(tmp); } } /* Parse one or more tag:s before parameters. * Moves arg to the end of tags. */ static struct dhcp_netid * dhcp_tags(char **arg) { struct dhcp_netid *id = NULL; while (is_tag_prefix(*arg)) { char *comma = split(*arg); id = dhcp_netid_create((*arg)+4, id); *arg = comma; }; if (!*arg) { dhcp_netid_free(id); id = NULL; } return id; } static void dhcp_netid_list_free(struct dhcp_netid_list *netid) { while (netid) { struct dhcp_netid_list *tmplist = netid; netid = netid->next; dhcp_netid_free(tmplist->list); free(tmplist); } } static void dhcp_config_free(struct dhcp_config *config) { if (config) { struct hwaddr_config *hwaddr = config->hwaddr; while (hwaddr) { struct hwaddr_config *tmp = hwaddr; hwaddr = hwaddr->next; free(tmp); } dhcp_netid_list_free(config->netid); dhcp_netid_free(config->filter); if (config->flags & CONFIG_CLID) free(config->clid); if (config->flags & CONFIG_NAME) free(config->hostname); #ifdef HAVE_DHCP6 if (config->flags & CONFIG_ADDR6) { struct addrlist *addr, *tmp; for (addr = config->addr6; addr; addr = tmp) { tmp = addr->next; free(addr); } } #endif free(config); } } static void dhcp_context_free(struct dhcp_context *ctx) { if (ctx) { dhcp_netid_free(ctx->filter); free(ctx->netid.net); #ifdef HAVE_DHCP6 free(ctx->template_interface); #endif free(ctx); } } static void dhcp_opt_free(struct dhcp_opt *opt) { if (opt->flags & DHOPT_VENDOR) free(opt->u.vendor_class); dhcp_netid_free(opt->netid); free(opt->val); free(opt); } /* This is too insanely large to keep in-line in the switch */ static int parse_dhcp_opt(char *errstr, char *arg, int flags) { struct dhcp_opt *new = opt_malloc(sizeof(struct dhcp_opt)); char lenchar = 0, *cp; int addrs, digs, is_addr, is_addr6, is_hex, is_dec, is_string, dots; char *comma = NULL; u16 opt_len = 0; int is6 = 0; int option_ok = 0; new->len = 0; new->flags = flags; new->netid = NULL; new->val = NULL; new->opt = 0; while (arg) { comma = split(arg); for (cp = arg; *cp; cp++) if (*cp < '0' || *cp > '9') break; if (!*cp) { new->opt = atoi(arg); opt_len = 0; option_ok = 1; break; } if (strstr(arg, "option:") == arg) { if ((new->opt = lookup_dhcp_opt(AF_INET, arg+7)) != -1) { opt_len = lookup_dhcp_len(AF_INET, new->opt); /* option: must follow tag and vendor string. */ if (!(opt_len & OT_INTERNAL) || flags == DHOPT_MATCH) option_ok = 1; } break; } #ifdef HAVE_DHCP6 else if (strstr(arg, "option6:") == arg) { for (cp = arg+8; *cp; cp++) if (*cp < '0' || *cp > '9') break; if (!*cp) { new->opt = atoi(arg+8); opt_len = 0; option_ok = 1; } else { if ((new->opt = lookup_dhcp_opt(AF_INET6, arg+8)) != -1) { opt_len = lookup_dhcp_len(AF_INET6, new->opt); if (!(opt_len & OT_INTERNAL) || flags == DHOPT_MATCH) option_ok = 1; } } /* option6:| must follow tag and vendor string. */ is6 = 1; break; } #endif else if (strstr(arg, "vendor:") == arg) { new->u.vendor_class = (unsigned char *)opt_string_alloc(arg+7); new->flags |= DHOPT_VENDOR; if ((new->flags & DHOPT_ENCAPSULATE) || flags == DHOPT_MATCH) goto_err(_("inappropriate vendor:")); } else if (strstr(arg, "encap:") == arg) { new->u.encap = atoi(arg+6); new->flags |= DHOPT_ENCAPSULATE; if ((new->flags & DHOPT_VENDOR) || flags == DHOPT_MATCH) goto_err(_("inappropriate encap:")); } else if (strstr(arg, "vi-encap:") == arg) { new->u.encap = atoi(arg+9); new->flags |= DHOPT_RFC3925; if (flags == DHOPT_MATCH) { option_ok = 1; break; } } else { /* allow optional "net:" or "tag:" for consistency */ const char *name = (is_tag_prefix(arg)) ? arg+4 : set_prefix(arg); new->netid = dhcp_netid_create(name, new->netid); } arg = comma; } #ifdef HAVE_DHCP6 if (is6) { if (new->flags & (DHOPT_VENDOR | DHOPT_ENCAPSULATE)) goto_err(_("unsupported encapsulation for IPv6 option")); if (opt_len == 0 && !(new->flags & DHOPT_RFC3925)) opt_len = lookup_dhcp_len(AF_INET6, new->opt); } else #endif if (opt_len == 0 && !(new->flags & (DHOPT_VENDOR | DHOPT_ENCAPSULATE | DHOPT_RFC3925))) opt_len = lookup_dhcp_len(AF_INET, new->opt); /* option may be missing with rfc3925 match */ if (!option_ok) goto_err(_("bad dhcp-option")); if (comma) { /* characterise the value */ char c; int found_dig = 0, found_colon = 0; is_addr = is_addr6 = is_hex = is_dec = is_string = 1; addrs = digs = 1; dots = 0; for (cp = comma; (c = *cp); cp++) if (c == ',') { addrs++; is_dec = is_hex = 0; } else if (c == ':') { digs++; is_dec = is_addr = 0; found_colon = 1; } else if (c == '/') { is_addr6 = is_dec = is_hex = 0; if (cp == comma) /* leading / means a pathname */ is_addr = 0; } else if (c == '.') { is_dec = is_hex = 0; dots++; } else if (c == '-') is_hex = is_addr = is_addr6 = 0; else if (c == ' ') is_dec = is_hex = 0; else if (!(c >='0' && c <= '9')) { is_addr = 0; if (cp[1] == 0 && is_dec && (c == 'b' || c == 's' || c == 'i')) { lenchar = c; *cp = 0; } else is_dec = 0; if (!((c >='A' && c <= 'F') || (c >='a' && c <= 'f') || (c == '*' && (flags & DHOPT_MATCH)))) { is_hex = 0; if (c != '[' && c != ']') is_addr6 = 0; } } else found_dig = 1; if (!found_dig) is_dec = is_addr = 0; if (!found_colon) is_addr6 = 0; #ifdef HAVE_DHCP6 /* NTP server option takes hex, addresses or FQDN */ if (is6 && new->opt == OPTION6_NTP_SERVER && !is_hex) opt_len |= is_addr6 ? OT_ADDR_LIST : OT_RFC1035_NAME; #endif /* We know that some options take addresses */ if (opt_len & OT_ADDR_LIST) { is_string = is_dec = is_hex = 0; if (!is6 && (!is_addr || dots == 0)) goto_err(_("bad IP address")); if (is6 && !is_addr6) goto_err(_("bad IPv6 address")); } /* or names */ else if (opt_len & (OT_NAME | OT_RFC1035_NAME | OT_CSTRING)) is_addr6 = is_addr = is_dec = is_hex = 0; if (found_dig && (opt_len & OT_TIME) && strlen(comma) > 0) { int val, fac = 1; switch (comma[strlen(comma) - 1]) { case 'w': case 'W': fac *= 7; /* fall through */ case 'd': case 'D': fac *= 24; /* fall through */ case 'h': case 'H': fac *= 60; /* fall through */ case 'm': case 'M': fac *= 60; /* fall through */ case 's': case 'S': comma[strlen(comma) - 1] = 0; } new->len = 4; new->val = opt_malloc(4); val = atoi(comma); *((int *)new->val) = htonl(val * fac); } else if (is_hex && digs > 1) { new->len = digs; new->val = opt_malloc(new->len); parse_hex(comma, new->val, digs, (flags & DHOPT_MATCH) ? &new->u.wildcard_mask : NULL, NULL); new->flags |= DHOPT_HEX; } else if (is_dec) { int i, val = atoi(comma); /* assume numeric arg is 1 byte except for options where it is known otherwise. For vendor class option, we have to hack. */ if (opt_len != 0) new->len = opt_len; else if (val & 0xffff0000) new->len = 4; else if (val & 0xff00) new->len = 2; else new->len = 1; if (lenchar == 'b') new->len = 1; else if (lenchar == 's') new->len = 2; else if (lenchar == 'i') new->len = 4; new->val = opt_malloc(new->len); for (i=0; ilen; i++) new->val[i] = val>>((new->len - i - 1)*8); } else if (is_addr && !is6) { struct in_addr in; unsigned char *op; char *slash; /* max length of address/subnet descriptor is five bytes, add one for the option 120 enc byte too */ new->val = op = opt_malloc((5 * addrs) + 1); new->flags |= DHOPT_ADDR; if (!(new->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925)) && new->opt == OPTION_SIP_SERVER) { *(op++) = 1; /* RFC 3361 "enc byte" */ new->flags &= ~DHOPT_ADDR; } while (addrs--) { cp = comma; comma = split(cp); slash = split_chr(cp, '/'); if (!inet_pton(AF_INET, cp, &in)) goto_err(_("bad IPv4 address")); if (!slash) { memcpy(op, &in, INADDRSZ); op += INADDRSZ; } else { unsigned char *p = (unsigned char *)∈ int netsize = atoi(slash); *op++ = netsize; if (netsize > 0) *op++ = *p++; if (netsize > 8) *op++ = *p++; if (netsize > 16) *op++ = *p++; if (netsize > 24) *op++ = *p++; new->flags &= ~DHOPT_ADDR; /* cannot re-write descriptor format */ } } new->len = op - new->val; } else if (is_addr6 && is6) { unsigned char *op; new->val = op = opt_malloc(16 * addrs); new->flags |= DHOPT_ADDR6; while (addrs--) { cp = comma; comma = split(cp); /* check for [1234::7] */ if (*cp == '[') cp++; if (strlen(cp) > 1 && cp[strlen(cp)-1] == ']') cp[strlen(cp)-1] = 0; if (inet_pton(AF_INET6, cp, op)) { op += IN6ADDRSZ; continue; } goto_err(_("bad IPv6 address")); } new->len = op - new->val; } else if (is_string) { /* text arg */ if ((new->opt == OPTION_DOMAIN_SEARCH || new->opt == OPTION_SIP_SERVER) && !is6 && !(new->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR | DHOPT_RFC3925))) { /* dns search, RFC 3397, or SIP, RFC 3361 */ unsigned char *q, *r, *tail; unsigned char *p, *m = NULL, *newp; size_t newlen, len = 0; int header_size = (new->opt == OPTION_DOMAIN_SEARCH) ? 0 : 1; arg = comma; comma = split(arg); while (arg && *arg) { char *in, *dom = NULL; size_t domlen = 1; /* Allow "." as an empty domain */ if (strcmp (arg, ".") != 0) { if (!(dom = canonicalise_opt(arg))) goto_err(_("bad domain in dhcp-option")); domlen = strlen(dom) + 2; } newp = opt_malloc(len + domlen + header_size); if (m) { memcpy(newp, m, header_size + len); free(m); } m = newp; p = m + header_size; q = p + len; /* add string on the end in RFC1035 format */ for (in = dom; in && *in;) { unsigned char *cp = q++; int j; for (j = 0; *in && (*in != '.'); in++, j++) *q++ = *in; *cp = j; if (*in) in++; } *q++ = 0; free(dom); /* Now tail-compress using earlier names. */ newlen = q - p; for (tail = p + len; *tail; tail += (*tail) + 1) for (r = p; r - p < (int)len; r += (*r) + 1) if (strcmp((char *)r, (char *)tail) == 0) { PUTSHORT((r - p) | 0xc000, tail); newlen = tail - p; goto end; } end: len = newlen; arg = comma; comma = split(arg); } /* RFC 3361, enc byte is zero for names */ if (new->opt == OPTION_SIP_SERVER && m) m[0] = 0; new->len = (int) len + header_size; new->val = m; } #ifdef HAVE_DHCP6 else if (comma && (opt_len & OT_CSTRING)) { /* length fields are two bytes so need 16 bits for each string */ int i, commas = 1; unsigned char *p, *newp; for (i = 0; comma[i]; i++) if (comma[i] == ',') commas++; newp = opt_malloc(strlen(comma)+(2*commas)); p = newp; arg = comma; comma = split(arg); while (arg && *arg) { u16 len = strlen(arg); unhide_metas(arg); PUTSHORT(len, p); memcpy(p, arg, len); p += len; arg = comma; comma = split(arg); } new->val = newp; new->len = p - newp; } else if (comma && (opt_len & OT_RFC1035_NAME)) { unsigned char *p = NULL, *q, *newp, *end; int len = 0; int header_size = (is6 && new->opt == OPTION6_NTP_SERVER) ? 4 : 0; arg = comma; comma = split(arg); while (arg && *arg) { char *dom = canonicalise_opt(arg); if (!dom) goto_err(_("bad domain in dhcp-option")); newp = opt_malloc(len + header_size + strlen(dom) + 2); if (p) { memcpy(newp, p, len); free(p); } p = newp; q = p + len; end = do_rfc1035_name(q + header_size, dom, NULL); *end++ = 0; if (is6 && new->opt == OPTION6_NTP_SERVER) { PUTSHORT(NTP_SUBOPTION_SRV_FQDN, q); PUTSHORT(end - q - 2, q); } len = end - p; free(dom); arg = comma; comma = split(arg); } new->val = p; new->len = len; } #endif else { new->len = strlen(comma); /* keep terminating zero on string */ new->val = (unsigned char *)opt_string_alloc(comma); new->flags |= DHOPT_STRING; } } } if (!is6 && ((new->len > 255) || (new->len > 253 && (new->flags & (DHOPT_VENDOR | DHOPT_ENCAPSULATE))) || (new->len > 250 && (new->flags & DHOPT_RFC3925)))) goto_err(_("dhcp-option too long")); if (flags == DHOPT_MATCH) { if ((new->flags & (DHOPT_ENCAPSULATE | DHOPT_VENDOR)) || !new->netid || new->netid->next) goto_err(_("illegal dhcp-match")); if (is6) { new->next = daemon->dhcp_match6; daemon->dhcp_match6 = new; } else { new->next = daemon->dhcp_match; daemon->dhcp_match = new; } } else if (is6) { new->next = daemon->dhcp_opts6; daemon->dhcp_opts6 = new; } else { new->next = daemon->dhcp_opts; daemon->dhcp_opts = new; } return 1; on_error: dhcp_opt_free(new); return 0; } #endif void set_option_bool(unsigned int opt) { option_var(opt) |= option_val(opt); } void reset_option_bool(unsigned int opt) { option_var(opt) &= ~(option_val(opt)); } static int one_opt(int option, char *arg, char *errstr, char *gen_err, int command_line, int servers_only) { int i; char *comma; if (option == '?') ret_err(gen_err); for (i=0; usage[i].opt != 0; i++) if (usage[i].opt == option) { int rept = usage[i].rept; if (command_line) { /* command line */ if (rept == ARG_USED_CL) ret_err(_("illegal repeated flag")); if (rept == ARG_ONE) usage[i].rept = ARG_USED_CL; } else { /* allow file to override command line */ if (rept == ARG_USED_FILE) ret_err(_("illegal repeated keyword")); if (rept == ARG_USED_CL || rept == ARG_ONE) usage[i].rept = ARG_USED_FILE; } if (rept != ARG_DUP && rept != ARG_ONE && rept != ARG_USED_CL) { set_option_bool(rept); return 1; } break; } switch (option) { case 'C': /* --conf-file */ { char *file = opt_string_alloc(arg); if (file) { one_file(file, 0); free(file); } break; } case '7': /* --conf-dir */ { DIR *dir_stream; struct dirent *ent; char *directory, *path; struct list { char *name; struct list *next; } *ignore_suffix = NULL, *match_suffix = NULL, *files = NULL, *li; comma = split(arg); if (!(directory = opt_string_alloc(arg))) break; for (arg = comma; arg; arg = comma) { comma = split(arg); if (strlen(arg) != 0) { li = opt_malloc(sizeof(struct list)); if (*arg == '*') { /* "*" with no suffix is a no-op */ if (arg[1] == 0) free(li); else { li->next = match_suffix; match_suffix = li; /* Have to copy: buffer is overwritten */ li->name = opt_string_alloc(arg+1); } } else { li->next = ignore_suffix; ignore_suffix = li; /* Have to copy: buffer is overwritten */ li->name = opt_string_alloc(arg); } } } if (!(dir_stream = opendir(directory))) die(_("cannot access directory %s: %s"), directory, EC_FILE); while ((ent = readdir(dir_stream))) { size_t len = strlen(ent->d_name); struct stat buf; /* ignore emacs backups and dotfiles */ if (len == 0 || ent->d_name[len - 1] == '~' || (ent->d_name[0] == '#' && ent->d_name[len - 1] == '#') || ent->d_name[0] == '.') continue; if (match_suffix) { for (li = match_suffix; li; li = li->next) { /* check for required suffices */ size_t ls = strlen(li->name); if (len > ls && strcmp(li->name, &ent->d_name[len - ls]) == 0) break; } if (!li) continue; } for (li = ignore_suffix; li; li = li->next) { /* check for proscribed suffices */ size_t ls = strlen(li->name); if (len > ls && strcmp(li->name, &ent->d_name[len - ls]) == 0) break; } if (li) continue; path = opt_malloc(strlen(directory) + len + 2); strcpy(path, directory); strcat(path, "/"); strcat(path, ent->d_name); /* files must be readable */ if (stat(path, &buf) == -1) die(_("cannot access %s: %s"), path, EC_FILE); /* only reg files allowed. */ if (S_ISREG(buf.st_mode)) { /* sort files into order. */ struct list **up, *new = opt_malloc(sizeof(struct list)); new->name = path; for (up = &files, li = files; li; up = &li->next, li = li->next) if (strcmp(li->name, path) >=0) break; new->next = li; *up = new; } } for (li = files; li; li = li->next) one_file(li->name, 0); closedir(dir_stream); free(directory); for(; ignore_suffix; ignore_suffix = li) { li = ignore_suffix->next; free(ignore_suffix->name); free(ignore_suffix); } for(; match_suffix; match_suffix = li) { li = match_suffix->next; free(match_suffix->name); free(match_suffix); } for(; files; files = li) { li = files->next; free(files->name); free(files); } break; } case LOPT_ADD_SBNET: /* --add-subnet */ set_option_bool(OPT_CLIENT_SUBNET); if (arg) { char *err, *end; comma = split(arg); struct mysubnet* new = opt_malloc(sizeof(struct mysubnet)); if ((end = split_chr(arg, '/'))) { /* has subnet+len */ err = parse_mysockaddr(arg, &new->addr); if (err) ret_err_free(err, new); if (!atoi_check(end, &new->mask)) ret_err_free(gen_err, new); new->addr_used = 1; } else if (!atoi_check(arg, &new->mask)) ret_err_free(gen_err, new); daemon->add_subnet4 = new; if (comma) { new = opt_malloc(sizeof(struct mysubnet)); if ((end = split_chr(comma, '/'))) { /* has subnet+len */ err = parse_mysockaddr(comma, &new->addr); if (err) ret_err_free(err, new); if (!atoi_check(end, &new->mask)) ret_err_free(gen_err, new); new->addr_used = 1; } else { if (!atoi_check(comma, &new->mask)) ret_err_free(gen_err, new); } daemon->add_subnet6 = new; } } break; case '1': /* --enable-dbus */ set_option_bool(OPT_DBUS); if (arg) daemon->dbus_name = opt_string_alloc(arg); else daemon->dbus_name = DNSMASQ_SERVICE; break; case LOPT_UBUS: /* --enable-ubus */ set_option_bool(OPT_UBUS); if (arg) daemon->ubus_name = opt_string_alloc(arg); else daemon->ubus_name = DNSMASQ_UBUS_NAME; break; case '8': /* --log-facility */ /* may be a filename */ if (strchr(arg, '/') || strcmp (arg, "-") == 0) daemon->log_file = opt_string_alloc(arg); else { #ifdef __ANDROID__ ret_err(_("setting log facility is not possible under Android")); #else for (i = 0; facilitynames[i].c_name; i++) if (hostname_isequal((char *)facilitynames[i].c_name, arg)) break; if (facilitynames[i].c_name) daemon->log_fac = facilitynames[i].c_val; else ret_err(_("bad log facility")); #endif } break; case 'x': /* --pid-file */ daemon->runfile = opt_string_alloc(arg); break; case 'r': /* --resolv-file */ { char *name = opt_string_alloc(arg); struct resolvc *new, *list = daemon->resolv_files; if (list && list->is_default) { /* replace default resolv file - possibly with nothing */ if (name) { list->is_default = 0; list->name = name; } else list = NULL; } else if (name) { new = opt_malloc(sizeof(struct resolvc)); new->next = list; new->name = name; new->is_default = 0; new->mtime = 0; new->logged = 0; list = new; } daemon->resolv_files = list; break; } case LOPT_SERVERS_FILE: daemon->servers_file = opt_string_alloc(arg); break; case 'm': /* --mx-host */ { int pref = 1; struct mx_srv_record *new; char *name, *target = NULL; if ((comma = split(arg))) { char *prefstr; if ((prefstr = split(comma)) && !atoi_check16(prefstr, &pref)) ret_err(_("bad MX preference")); } if (!(name = canonicalise_opt(arg)) || (comma && !(target = canonicalise_opt(comma)))) ret_err(_("bad MX name")); new = opt_malloc(sizeof(struct mx_srv_record)); new->next = daemon->mxnames; daemon->mxnames = new; new->issrv = 0; new->name = name; new->target = target; /* may be NULL */ new->weight = pref; break; } case 't': /* --mx-target */ if (!(daemon->mxtarget = canonicalise_opt(arg))) ret_err(_("bad MX target")); break; case LOPT_DUMPFILE: /* --dumpfile */ daemon->dump_file = opt_string_alloc(arg); break; case LOPT_DUMPMASK: /* --dumpmask */ daemon->dump_mask = strtol(arg, NULL, 0); break; #ifdef HAVE_DHCP case 'l': /* --dhcp-leasefile */ daemon->lease_file = opt_string_alloc(arg); break; /* Sorry about the gross pre-processor abuse */ case '6': /* --dhcp-script */ case LOPT_LUASCRIPT: /* --dhcp-luascript */ # if !defined(HAVE_SCRIPT) ret_err(_("recompile with HAVE_SCRIPT defined to enable lease-change scripts")); # else if (option == LOPT_LUASCRIPT) # if !defined(HAVE_LUASCRIPT) ret_err(_("recompile with HAVE_LUASCRIPT defined to enable Lua scripts")); # else daemon->luascript = opt_string_alloc(arg); # endif else daemon->lease_change_command = opt_string_alloc(arg); # endif break; #endif /* HAVE_DHCP */ case LOPT_DHCP_HOST: /* --dhcp-hostsfile */ case LOPT_DHCP_OPTS: /* --dhcp-optsfile */ case LOPT_DHCP_INOTIFY: /* --dhcp-hostsdir */ case LOPT_DHOPT_INOTIFY: /* --dhcp-optsdir */ case LOPT_HOST_INOTIFY: /* --hostsdir */ case 'H': /* --addn-hosts */ { struct hostsfile *new = opt_malloc(sizeof(struct hostsfile)); static unsigned int hosts_index = SRC_AH; new->fname = opt_string_alloc(arg); new->index = hosts_index++; new->flags = 0; if (option == 'H') { new->next = daemon->addn_hosts; daemon->addn_hosts = new; } else if (option == LOPT_DHCP_HOST) { new->next = daemon->dhcp_hosts_file; daemon->dhcp_hosts_file = new; } else if (option == LOPT_DHCP_OPTS) { new->next = daemon->dhcp_opts_file; daemon->dhcp_opts_file = new; } else { new->next = daemon->dynamic_dirs; daemon->dynamic_dirs = new; if (option == LOPT_DHCP_INOTIFY) new->flags |= AH_DHCP_HST; else if (option == LOPT_DHOPT_INOTIFY) new->flags |= AH_DHCP_OPT; else if (option == LOPT_HOST_INOTIFY) new->flags |= AH_HOSTS; } break; } case LOPT_AUTHSERV: /* --auth-server */ comma = split(arg); daemon->authserver = opt_string_alloc(arg); while ((arg = comma)) { struct iname *new = opt_malloc(sizeof(struct iname)); comma = split(arg); new->name = NULL; unhide_metas(arg); if (inet_pton(AF_INET, arg, &new->addr.in.sin_addr) > 0) new->addr.sa.sa_family = AF_INET; else if (inet_pton(AF_INET6, arg, &new->addr.in6.sin6_addr) > 0) new->addr.sa.sa_family = AF_INET6; else { char *fam = split_chr(arg, '/'); new->name = opt_string_alloc(arg); new->addr.sa.sa_family = 0; if (fam) { if (strcmp(fam, "4") == 0) new->addr.sa.sa_family = AF_INET; else if (strcmp(fam, "6") == 0) new->addr.sa.sa_family = AF_INET6; else { free(new->name); ret_err_free(gen_err, new); } } } new->next = daemon->authinterface; daemon->authinterface = new; }; break; case LOPT_AUTHSFS: /* --auth-sec-servers */ { struct name_list *new; do { comma = split(arg); new = opt_malloc(sizeof(struct name_list)); new->name = opt_string_alloc(arg); new->next = daemon->secondary_forward_server; daemon->secondary_forward_server = new; arg = comma; } while (arg); break; } case LOPT_AUTHZONE: /* --auth-zone */ { struct auth_zone *new; comma = split(arg); new = opt_malloc(sizeof(struct auth_zone)); new->domain = opt_string_alloc(arg); new->subnet = NULL; new->exclude = NULL; new->interface_names = NULL; new->next = daemon->auth_zones; daemon->auth_zones = new; while ((arg = comma)) { int prefixlen = 0; int is_exclude = 0; char *prefix; struct addrlist *subnet = NULL; union all_addr addr; comma = split(arg); prefix = split_chr(arg, '/'); if (prefix && !atoi_check(prefix, &prefixlen)) ret_err(gen_err); if (strstr(arg, "exclude:") == arg) { is_exclude = 1; arg = arg+8; } if (inet_pton(AF_INET, arg, &addr.addr4)) { subnet = opt_malloc(sizeof(struct addrlist)); subnet->prefixlen = (prefixlen == 0) ? 24 : prefixlen; subnet->flags = ADDRLIST_LITERAL; } else if (inet_pton(AF_INET6, arg, &addr.addr6)) { subnet = opt_malloc(sizeof(struct addrlist)); subnet->prefixlen = (prefixlen == 0) ? 64 : prefixlen; subnet->flags = ADDRLIST_LITERAL | ADDRLIST_IPV6; } else { struct auth_name_list *name = opt_malloc(sizeof(struct auth_name_list)); name->name = opt_string_alloc(arg); name->flags = AUTH4 | AUTH6; name->next = new->interface_names; new->interface_names = name; if (prefix) { if (prefixlen == 4) name->flags &= ~AUTH6; else if (prefixlen == 6) name->flags &= ~AUTH4; else ret_err(gen_err); } } if (subnet) { subnet->addr = addr; if (is_exclude) { subnet->next = new->exclude; new->exclude = subnet; } else { subnet->next = new->subnet; new->subnet = subnet; } } } break; } case LOPT_AUTHSOA: /* --auth-soa */ comma = split(arg); daemon->soa_sn = (u32)atoi(arg); if (comma) { char *cp; arg = comma; comma = split(arg); daemon->hostmaster = opt_string_alloc(arg); for (cp = daemon->hostmaster; cp && *cp; cp++) if (*cp == '@') *cp = '.'; if (comma) { arg = comma; comma = split(arg); daemon->soa_refresh = (u32)atoi(arg); if (comma) { arg = comma; comma = split(arg); daemon->soa_retry = (u32)atoi(arg); if (comma) daemon->soa_expiry = (u32)atoi(comma); } } } break; case 's': /* --domain */ case LOPT_SYNTH: /* --synth-domain */ if (strcmp (arg, "#") == 0) set_option_bool(OPT_RESOLV_DOMAIN); else { char *d, *d_raw = arg; comma = split(arg); if (!(d = canonicalise_opt(d_raw))) ret_err(gen_err); else { free(d); /* allocate this again below. */ if (comma) { struct cond_domain *new = opt_malloc(sizeof(struct cond_domain)); char *netpart; new->prefix = NULL; new->indexed = 0; new->prefixlen = 0; unhide_metas(comma); if ((netpart = split_chr(comma, '/'))) { int msize; arg = split(netpart); if (!atoi_check(netpart, &msize)) ret_err_free(gen_err, new); else if (inet_pton(AF_INET, comma, &new->start)) { int mask; if (msize > 32) ret_err_free(_("bad prefix length"), new); mask = (1 << (32 - msize)) - 1; new->is6 = 0; new->start.s_addr = ntohl(htonl(new->start.s_addr) & ~mask); new->end.s_addr = new->start.s_addr | htonl(mask); if (arg) { if (option != 's') { if (!(new->prefix = canonicalise_opt(arg)) || strlen(new->prefix) > MAXLABEL - INET_ADDRSTRLEN) ret_err_free(_("bad prefix"), new); } else if (strcmp(arg, "local") != 0 || (msize != 8 && msize != 16 && msize != 24)) ret_err_free(gen_err, new); else { char domain[29]; /* strlen("xxx.yyy.zzz.ttt.in-addr.arpa")+1 */ /* local=/xxx.yyy.zzz.in-addr.arpa/ */ /* domain_rev4 can't fail here, msize checked above. */ domain_rev4(domain, new->start, msize); add_update_server(SERV_LITERAL_ADDRESS, NULL, NULL, NULL, domain, NULL); /* local=// */ /* d_raw can't failed to canonicalise here, checked above. */ add_update_server(SERV_LITERAL_ADDRESS, NULL, NULL, NULL, d_raw, NULL); } } } else if (inet_pton(AF_INET6, comma, &new->start6)) { u64 mask, addrpart = addr6part(&new->start6); if (msize > 128) ret_err_free(_("bad prefix length"), new); mask = (1LLU << (128 - msize)) - 1LLU; new->is6 = 1; new->prefixlen = msize; /* prefix==64 overflows the mask calculation above */ if (msize <= 64) mask = (u64)-1LL; new->end6 = new->start6; setaddr6part(&new->start6, addrpart & ~mask); setaddr6part(&new->end6, addrpart | mask); if (arg) { if (option != 's') { if (!(new->prefix = canonicalise_opt(arg)) || strlen(new->prefix) > MAXLABEL - INET6_ADDRSTRLEN) ret_err_free(_("bad prefix"), new); } else if (strcmp(arg, "local") != 0 || ((msize & 4) != 0)) ret_err_free(gen_err, new); else { char domain[73]; /* strlen("32*ip6.arpa")+1 */ /* generate the equivalent of local=/xxx.yyy.zzz.ip6.arpa/ */ domain_rev6(domain, &new->start6, msize); add_update_server(SERV_LITERAL_ADDRESS, NULL, NULL, NULL, domain, NULL); /* local=// */ /* d_raw can't failed to canonicalise here, checked above. */ add_update_server(SERV_LITERAL_ADDRESS, NULL, NULL, NULL, d_raw, NULL); } } } else ret_err_free(gen_err, new); } else { char *prefstr; arg = split(comma); prefstr = split(arg); if (inet_pton(AF_INET, comma, &new->start)) { new->is6 = 0; if (!arg) new->end.s_addr = new->start.s_addr; else if (!inet_pton(AF_INET, arg, &new->end)) ret_err_free(gen_err, new); } else if (inet_pton(AF_INET6, comma, &new->start6)) { new->is6 = 1; if (!arg) memcpy(&new->end6, &new->start6, IN6ADDRSZ); else if (!inet_pton(AF_INET6, arg, &new->end6)) ret_err_free(gen_err, new); } else ret_err_free(gen_err, new); if (option != 's' && prefstr) { if (!(new->prefix = canonicalise_opt(prefstr)) || strlen(new->prefix) > MAXLABEL - INET_ADDRSTRLEN) ret_err_free(_("bad prefix"), new); } } new->domain = canonicalise_opt(d_raw); if (option == 's') { new->next = daemon->cond_domain; daemon->cond_domain = new; } else { char *star; if (new->prefix && (star = strrchr(new->prefix, '*')) && *(star+1) == 0) { *star = 0; new->indexed = 1; if (new->is6 && new->prefixlen < 64) ret_err_free(_("prefix length too small"), new); } new->next = daemon->synth_domains; daemon->synth_domains = new; } } else if (option == 's') daemon->domain_suffix = canonicalise_opt(d_raw); else ret_err(gen_err); } } break; case LOPT_CPE_ID: /* --add-dns-client */ if (arg) daemon->dns_client_id = opt_string_alloc(arg); break; case LOPT_UMBRELLA: /* --umbrella */ set_option_bool(OPT_UMBRELLA); while (arg) { comma = split(arg); if (strstr(arg, "deviceid:")) { arg += 9; if (strlen(arg) != 16) ret_err(gen_err); for (char *p = arg; *p; p++) { if (!isxdigit((int)*p)) ret_err(gen_err); } set_option_bool(OPT_UMBRELLA_DEVID); u8 *u = daemon->umbrella_device; char word[3]; for (u8 i = 0; i < sizeof(daemon->umbrella_device); i++, arg+=2) { memcpy(word, &(arg[0]), 2); *u++ = strtoul(word, NULL, 16); } } else if (strstr(arg, "orgid:")) { if (!strtoul_check(arg+6, &daemon->umbrella_org)) { ret_err(gen_err); } } else if (strstr(arg, "assetid:")) { if (!strtoul_check(arg+8, &daemon->umbrella_asset)) { ret_err(gen_err); } } arg = comma; } break; case LOPT_ADD_MAC: /* --add-mac */ if (!arg) set_option_bool(OPT_ADD_MAC); else { unhide_metas(arg); if (strcmp(arg, "base64") == 0) set_option_bool(OPT_MAC_B64); else if (strcmp(arg, "text") == 0) set_option_bool(OPT_MAC_HEX); else ret_err(gen_err); } break; case 'u': /* --user */ daemon->username = opt_string_alloc(arg); break; case 'g': /* --group */ daemon->groupname = opt_string_alloc(arg); daemon->group_set = 1; break; #ifdef HAVE_DHCP case LOPT_SCRIPTUSR: /* --scriptuser */ daemon->scriptuser = opt_string_alloc(arg); break; #endif case 'i': /* --interface */ do { struct iname *new = opt_malloc(sizeof(struct iname)); comma = split(arg); new->next = daemon->if_names; daemon->if_names = new; /* new->name may be NULL if someone does "interface=" to disable all interfaces except loop. */ new->name = opt_string_alloc(arg); new->used = 0; arg = comma; } while (arg); break; case LOPT_TFTP: /* --enable-tftp */ set_option_bool(OPT_TFTP); if (!arg) break; /* fall through */ case 'I': /* --except-interface */ case '2': /* --no-dhcp-interface */ do { struct iname *new = opt_malloc(sizeof(struct iname)); comma = split(arg); new->name = opt_string_alloc(arg); if (option == 'I') { new->next = daemon->if_except; daemon->if_except = new; } else if (option == LOPT_TFTP) { new->next = daemon->tftp_interfaces; daemon->tftp_interfaces = new; } else { new->next = daemon->dhcp_except; daemon->dhcp_except = new; } arg = comma; } while (arg); break; case 'B': /* --bogus-nxdomain */ case LOPT_IGNORE_ADDR: /* --ignore-address */ { union all_addr addr; int prefix, is6 = 0; struct bogus_addr *baddr; unhide_metas(arg); if (!arg || ((comma = split_chr(arg, '/')) && !atoi_check(comma, &prefix))) ret_err(gen_err); if (inet_pton(AF_INET6, arg, &addr.addr6) == 1) is6 = 1; else if (inet_pton(AF_INET, arg, &addr.addr4) != 1) ret_err(gen_err); if (!comma) { if (is6) prefix = 128; else prefix = 32; } if (prefix > 128 || (!is6 && prefix > 32)) ret_err(gen_err); baddr = opt_malloc(sizeof(struct bogus_addr)); if (option == 'B') { baddr->next = daemon->bogus_addr; daemon->bogus_addr = baddr; } else { baddr->next = daemon->ignore_addr; daemon->ignore_addr = baddr; } baddr->prefix = prefix; baddr->is6 = is6; baddr->addr = addr; break; } case 'a': /* --listen-address */ case LOPT_AUTHPEER: /* --auth-peer */ do { struct iname *new = opt_malloc(sizeof(struct iname)); comma = split(arg); unhide_metas(arg); if (arg && (inet_pton(AF_INET, arg, &new->addr.in.sin_addr) > 0)) { new->addr.sa.sa_family = AF_INET; new->addr.in.sin_port = 0; #ifdef HAVE_SOCKADDR_SA_LEN new->addr.in.sin_len = sizeof(new->addr.in); #endif } else if (arg && inet_pton(AF_INET6, arg, &new->addr.in6.sin6_addr) > 0) { new->addr.sa.sa_family = AF_INET6; new->addr.in6.sin6_flowinfo = 0; new->addr.in6.sin6_scope_id = 0; new->addr.in6.sin6_port = 0; #ifdef HAVE_SOCKADDR_SA_LEN new->addr.in6.sin6_len = sizeof(new->addr.in6); #endif } else ret_err_free(gen_err, new); new->used = 0; if (option == 'a') { new->next = daemon->if_addrs; daemon->if_addrs = new; } else { new->next = daemon->auth_peers; daemon->auth_peers = new; } arg = comma; } while (arg); break; case LOPT_NO_REBIND: /* --rebind-domain-ok */ { struct server *new; unhide_metas(arg); if (*arg == '/') arg++; do { comma = split_chr(arg, '/'); new = opt_malloc(sizeof(struct serv_local)); new->domain = opt_string_alloc(arg); new->domain_len = strlen(arg); new->next = daemon->no_rebind; daemon->no_rebind = new; arg = comma; } while (arg && *arg); break; } case 'S': /* --server */ case LOPT_LOCAL: /* --local */ case 'A': /* --address */ { char *lastdomain = NULL, *domain = ""; u16 flags = 0; char *err; union all_addr addr; union mysockaddr serv_addr, source_addr; char interface[IF_NAMESIZE+1]; unhide_metas(arg); /* split the domain args, if any and skip to the end of them. */ if (arg && *arg == '/') { char *last; domain = lastdomain = ++arg; while ((last = split_chr(arg, '/'))) { lastdomain = arg; arg = last; } } if (!arg || !*arg) flags = SERV_LITERAL_ADDRESS; else if (option == 'A') { /* # as literal address means return zero address for 4 and 6 */ if (strcmp(arg, "#") == 0) flags = SERV_ALL_ZEROS | SERV_LITERAL_ADDRESS; else if (inet_pton(AF_INET, arg, &addr.addr4) > 0) flags = SERV_4ADDR | SERV_LITERAL_ADDRESS; else if (inet_pton(AF_INET6, arg, &addr.addr6) > 0) flags = SERV_6ADDR | SERV_LITERAL_ADDRESS; else ret_err(_("Bad address in --address")); } else { if ((err = parse_server(arg, &serv_addr, &source_addr, interface, &flags))) ret_err(err); } if (servers_only && option == 'S') flags |= SERV_FROM_FILE; while (1) { /* server=//1.2.3.4 is special. */ if (strlen(domain) == 0 && lastdomain) flags |= SERV_FOR_NODOTS; else flags &= ~SERV_FOR_NODOTS; if (!add_update_server(flags, &serv_addr, &source_addr, interface, domain, &addr)) ret_err(gen_err); if (!lastdomain || domain == lastdomain) break; domain += strlen(domain) + 1; } break; } case LOPT_REV_SERV: /* --rev-server */ { char *string; int size; u16 flags = 0; char domain[73]; /* strlen("32*ip6.arpa")+1 */ struct in_addr addr4; struct in6_addr addr6; union mysockaddr serv_addr, source_addr; char interface[IF_NAMESIZE+1]; unhide_metas(arg); if (!arg) ret_err(gen_err); comma=split(arg); if (!(string = split_chr(arg, '/')) || !atoi_check(string, &size)) ret_err(gen_err); if (inet_pton(AF_INET, arg, &addr4)) { if (!domain_rev4(domain, addr4, size)) ret_err(_("bad IPv4 prefix")); } else if (inet_pton(AF_INET6, arg, &addr6)) { if (!domain_rev6(domain, &addr6, size)) ret_err(_("bad IPv6 prefix")); } else ret_err(gen_err); if (!comma) flags |= SERV_LITERAL_ADDRESS; else if ((string = parse_server(comma, &serv_addr, &source_addr, interface, &flags))) ret_err(string); if (servers_only) flags |= SERV_FROM_FILE; if (!add_update_server(flags, &serv_addr, &source_addr, interface, domain, NULL)) ret_err(gen_err); break; } case LOPT_IPSET: /* --ipset */ #ifndef HAVE_IPSET ret_err(_("recompile with HAVE_IPSET defined to enable ipset directives")); break; #else { struct ipsets ipsets_head; struct ipsets *ipsets = &ipsets_head; int size; char *end; char **sets, **sets_pos; memset(ipsets, 0, sizeof(struct ipsets)); unhide_metas(arg); if (arg && *arg == '/') { arg++; while ((end = split_chr(arg, '/'))) { char *domain = NULL; /* elide leading dots - they are implied in the search algorithm */ while (*arg == '.') arg++; /* # matches everything and becomes a zero length domain string */ if (strcmp(arg, "#") == 0 || !*arg) domain = ""; else if (strlen(arg) != 0 && !(domain = canonicalise_opt(arg))) ret_err(gen_err); ipsets->next = opt_malloc(sizeof(struct ipsets)); ipsets = ipsets->next; memset(ipsets, 0, sizeof(struct ipsets)); ipsets->domain = domain; arg = end; } } else { ipsets->next = opt_malloc(sizeof(struct ipsets)); ipsets = ipsets->next; memset(ipsets, 0, sizeof(struct ipsets)); ipsets->domain = ""; } if (!arg || !*arg) ret_err(gen_err); for (size = 2, end = arg; *end; ++end) if (*end == ',') ++size; sets = sets_pos = opt_malloc(sizeof(char *) * size); do { end = split(arg); *sets_pos++ = opt_string_alloc(arg); arg = end; } while (end); *sets_pos = 0; for (ipsets = &ipsets_head; ipsets->next; ipsets = ipsets->next) ipsets->next->sets = sets; ipsets->next = daemon->ipsets; daemon->ipsets = ipsets_head.next; break; } #endif case LOPT_CMARK_ALST_EN: /* --connmark-allowlist-enable */ #ifndef HAVE_CONNTRACK ret_err(_("recompile with HAVE_CONNTRACK defined to enable connmark-allowlist directives")); break; #else { u32 mask = UINT32_MAX; if (arg) if (!strtoul_check(arg, &mask) || mask < 1) ret_err(gen_err); set_option_bool(OPT_CMARK_ALST_EN); daemon->allowlist_mask = mask; break; } #endif case LOPT_CMARK_ALST: /* --connmark-allowlist */ #ifndef HAVE_CONNTRACK ret_err(_("recompile with HAVE_CONNTRACK defined to enable connmark-allowlist directives")); break; #else { struct allowlist *allowlists; char **patterns, **patterns_pos; u32 mark, mask = UINT32_MAX; size_t num_patterns = 0; char *c, *m = NULL; char *separator; unhide_metas(arg); if (!arg) ret_err(gen_err); c = arg; if (*c < '0' || *c > '9') ret_err(gen_err); while (*c && *c != ',') { if (*c == '/') { if (m) ret_err(gen_err); *c = '\0'; m = ++c; } if (*c < '0' || *c > '9') ret_err(gen_err); c++; } separator = c; if (!*separator) break; while (c && *c) { char *end = strchr(++c, '/'); if (end) *end = '\0'; if (strcmp(c, "*") && !is_valid_dns_name_pattern(c)) ret_err(gen_err); if (end) *end = '/'; if (num_patterns >= UINT16_MAX - 1) ret_err(gen_err); num_patterns++; c = end; } *separator = '\0'; if (!strtoul_check(arg, &mark) || mark < 1 || mark > UINT32_MAX) ret_err(gen_err); if (m) if (!strtoul_check(m, &mask) || mask < 1 || mask > UINT32_MAX || (mark & ~mask)) ret_err(gen_err); if (num_patterns) *separator = ','; for (allowlists = daemon->allowlists; allowlists; allowlists = allowlists->next) if (allowlists->mark == mark && allowlists->mask == mask) ret_err(gen_err); patterns = opt_malloc((num_patterns + 1) * sizeof(char *)); if (!patterns) goto fail_cmark_allowlist; patterns_pos = patterns; c = separator; while (c && *c) { char *end = strchr(++c, '/'); if (end) *end = '\0'; if (!(*patterns_pos++ = opt_string_alloc(c))) goto fail_cmark_allowlist; if (end) *end = '/'; c = end; } *patterns_pos++ = NULL; allowlists = opt_malloc(sizeof(struct allowlist)); if (!allowlists) goto fail_cmark_allowlist; memset(allowlists, 0, sizeof(struct allowlist)); allowlists->mark = mark; allowlists->mask = mask; allowlists->patterns = patterns; allowlists->next = daemon->allowlists; daemon->allowlists = allowlists; break; fail_cmark_allowlist: if (patterns) { for (patterns_pos = patterns; *patterns_pos; patterns_pos++) { free(*patterns_pos); *patterns_pos = NULL; } free(patterns); patterns = NULL; } if (allowlists) { free(allowlists); allowlists = NULL; } ret_err(gen_err); } #endif case 'c': /* --cache-size */ { int size; if (!atoi_check(arg, &size)) ret_err(gen_err); else { /* zero is OK, and means no caching. */ if (size < 0) size = 0; /* Note that for very large cache sizes, the malloc() will overflow. For the size of the cache record at the time this was noted, the value of "very large" was 46684428. Limit to an order of magnitude less than that to be safe from changes to the cache record. */ if (size > 5000000) size = 5000000; daemon->cachesize = size; } break; } case 'p': /* --port */ if (!atoi_check16(arg, &daemon->port)) ret_err(gen_err); break; case LOPT_MINPORT: /* --min-port */ if (!atoi_check16(arg, &daemon->min_port)) ret_err(gen_err); break; case LOPT_MAXPORT: /* --max-port */ if (!atoi_check16(arg, &daemon->max_port)) ret_err(gen_err); break; case '0': /* --dns-forward-max */ if (!atoi_check(arg, &daemon->ftabsize)) ret_err(gen_err); break; case 'q': /* --log-queries */ set_option_bool(OPT_LOG); if (arg && strcmp(arg, "extra") == 0) set_option_bool(OPT_EXTRALOG); break; case LOPT_MAX_LOGS: /* --log-async */ daemon->max_logs = LOG_MAX; /* default */ if (arg && !atoi_check(arg, &daemon->max_logs)) ret_err(gen_err); else if (daemon->max_logs > 100) daemon->max_logs = 100; break; case 'P': /* --edns-packet-max */ { int i; if (!atoi_check(arg, &i)) ret_err(gen_err); daemon->edns_pktsz = (unsigned short)i; break; } case 'Q': /* --query-port */ if (!atoi_check16(arg, &daemon->query_port)) ret_err(gen_err); /* if explicitly set to zero, use single OS ephemeral port and disable random ports */ if (daemon->query_port == 0) daemon->osport = 1; break; case 'T': /* --local-ttl */ case LOPT_NEGTTL: /* --neg-ttl */ case LOPT_MAXTTL: /* --max-ttl */ case LOPT_MINCTTL: /* --min-cache-ttl */ case LOPT_MAXCTTL: /* --max-cache-ttl */ case LOPT_AUTHTTL: /* --auth-ttl */ case LOPT_DHCPTTL: /* --dhcp-ttl */ { int ttl; if (!atoi_check(arg, &ttl)) ret_err(gen_err); else if (option == LOPT_NEGTTL) daemon->neg_ttl = (unsigned long)ttl; else if (option == LOPT_MAXTTL) daemon->max_ttl = (unsigned long)ttl; else if (option == LOPT_MINCTTL) { if (ttl > TTL_FLOOR_LIMIT) ttl = TTL_FLOOR_LIMIT; daemon->min_cache_ttl = (unsigned long)ttl; } else if (option == LOPT_MAXCTTL) daemon->max_cache_ttl = (unsigned long)ttl; else if (option == LOPT_AUTHTTL) daemon->auth_ttl = (unsigned long)ttl; else if (option == LOPT_DHCPTTL) { daemon->dhcp_ttl = (unsigned long)ttl; daemon->use_dhcp_ttl = 1; } else daemon->local_ttl = (unsigned long)ttl; break; } #ifdef HAVE_DHCP case 'X': /* --dhcp-lease-max */ if (!atoi_check(arg, &daemon->dhcp_max)) ret_err(gen_err); break; #endif #ifdef HAVE_TFTP case LOPT_TFTP_MAX: /* --tftp-max */ if (!atoi_check(arg, &daemon->tftp_max)) ret_err(gen_err); break; case LOPT_TFTP_MTU: /* --tftp-mtu */ if (!atoi_check(arg, &daemon->tftp_mtu)) ret_err(gen_err); break; case LOPT_PREFIX: /* --tftp-prefix */ comma = split(arg); if (comma) { struct tftp_prefix *new = opt_malloc(sizeof(struct tftp_prefix)); new->interface = opt_string_alloc(comma); new->prefix = opt_string_alloc(arg); new->next = daemon->if_prefix; daemon->if_prefix = new; } else daemon->tftp_prefix = opt_string_alloc(arg); break; case LOPT_TFTPPORTS: /* --tftp-port-range */ if (!(comma = split(arg)) || !atoi_check16(arg, &daemon->start_tftp_port) || !atoi_check16(comma, &daemon->end_tftp_port)) ret_err(_("bad port range")); if (daemon->start_tftp_port > daemon->end_tftp_port) { int tmp = daemon->start_tftp_port; daemon->start_tftp_port = daemon->end_tftp_port; daemon->end_tftp_port = tmp; } break; case LOPT_APREF: /* --tftp-unique-root */ if (!arg || strcasecmp(arg, "ip") == 0) set_option_bool(OPT_TFTP_APREF_IP); else if (strcasecmp(arg, "mac") == 0) set_option_bool(OPT_TFTP_APREF_MAC); else ret_err(gen_err); break; #endif case LOPT_BRIDGE: /* --bridge-interface */ { struct dhcp_bridge *new; if (!(comma = split(arg)) || strlen(arg) > IF_NAMESIZE - 1 ) ret_err(_("bad bridge-interface")); for (new = daemon->bridges; new; new = new->next) if (strcmp(new->iface, arg) == 0) break; if (!new) { new = opt_malloc(sizeof(struct dhcp_bridge)); strcpy(new->iface, arg); new->alias = NULL; new->next = daemon->bridges; daemon->bridges = new; } do { arg = comma; comma = split(arg); if (strlen(arg) != 0 && strlen(arg) <= IF_NAMESIZE - 1) { struct dhcp_bridge *b = opt_malloc(sizeof(struct dhcp_bridge)); b->next = new->alias; new->alias = b; strcpy(b->iface, arg); } } while (comma); break; } #ifdef HAVE_DHCP case LOPT_SHARED_NET: /* --shared-network */ { struct shared_network *new = opt_malloc(sizeof(struct shared_network)); #ifdef HAVE_DHCP6 new->shared_addr.s_addr = 0; #endif new->if_index = 0; if (!(comma = split(arg))) { snerr: free(new); ret_err(_("bad shared-network")); } if (inet_pton(AF_INET, comma, &new->shared_addr)) { if (!inet_pton(AF_INET, arg, &new->match_addr) && !(new->if_index = if_nametoindex(arg))) goto snerr; } #ifdef HAVE_DHCP6 else if (inet_pton(AF_INET6, comma, &new->shared_addr6)) { if (!inet_pton(AF_INET6, arg, &new->match_addr6) && !(new->if_index = if_nametoindex(arg))) goto snerr; } #endif else goto snerr; new->next = daemon->shared_networks; daemon->shared_networks = new; break; } case 'F': /* --dhcp-range */ { int k, leasepos = 2; char *cp, *a[8] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; struct dhcp_context *new = opt_malloc(sizeof(struct dhcp_context)); memset (new, 0, sizeof(*new)); while(1) { for (cp = arg; *cp; cp++) if (!(*cp == ' ' || *cp == '.' || *cp == ':' || (*cp >= 'a' && *cp <= 'f') || (*cp >= 'A' && *cp <= 'F') || (*cp >='0' && *cp <= '9'))) break; if (*cp != ',' && (comma = split(arg))) { if (is_tag_prefix(arg)) { /* ignore empty tag */ if (arg[4]) new->filter = dhcp_netid_create(arg+4, new->filter); } else { if (new->netid.net) { dhcp_context_free(new); ret_err(_("only one tag allowed")); } else new->netid.net = opt_string_alloc(set_prefix(arg)); } arg = comma; } else { a[0] = arg; break; } } for (k = 1; k < 8; k++) if (!(a[k] = split(a[k-1]))) break; if (k < 2) { dhcp_context_free(new); ret_err(_("bad dhcp-range")); } if (inet_pton(AF_INET, a[0], &new->start)) { new->next = daemon->dhcp; new->lease_time = DEFLEASE; daemon->dhcp = new; new->end = new->start; if (strcmp(a[1], "static") == 0) new->flags |= CONTEXT_STATIC; else if (strcmp(a[1], "proxy") == 0) new->flags |= CONTEXT_PROXY; else if (!inet_pton(AF_INET, a[1], &new->end)) { dhcp_context_free(new); ret_err(_("bad dhcp-range")); } if (ntohl(new->start.s_addr) > ntohl(new->end.s_addr)) { struct in_addr tmp = new->start; new->start = new->end; new->end = tmp; } if (k >= 3 && strchr(a[2], '.') && (inet_pton(AF_INET, a[2], &new->netmask) > 0)) { new->flags |= CONTEXT_NETMASK; leasepos = 3; if (!is_same_net(new->start, new->end, new->netmask)) { dhcp_context_free(new); ret_err(_("inconsistent DHCP range")); } if (k >= 4 && strchr(a[3], '.') && (inet_pton(AF_INET, a[3], &new->broadcast) > 0)) { new->flags |= CONTEXT_BRDCAST; leasepos = 4; } } } #ifdef HAVE_DHCP6 else if (inet_pton(AF_INET6, a[0], &new->start6)) { const char *err = NULL; new->flags |= CONTEXT_V6; new->prefix = 64; /* default */ new->end6 = new->start6; new->lease_time = DEFLEASE6; new->next = daemon->dhcp6; daemon->dhcp6 = new; for (leasepos = 1; leasepos < k; leasepos++) { if (strcmp(a[leasepos], "static") == 0) new->flags |= CONTEXT_STATIC | CONTEXT_DHCP; else if (strcmp(a[leasepos], "ra-only") == 0 || strcmp(a[leasepos], "slaac") == 0 ) new->flags |= CONTEXT_RA; else if (strcmp(a[leasepos], "ra-names") == 0) new->flags |= CONTEXT_RA_NAME | CONTEXT_RA; else if (strcmp(a[leasepos], "ra-advrouter") == 0) new->flags |= CONTEXT_RA_ROUTER | CONTEXT_RA; else if (strcmp(a[leasepos], "ra-stateless") == 0) new->flags |= CONTEXT_RA_STATELESS | CONTEXT_DHCP | CONTEXT_RA; else if (strcmp(a[leasepos], "off-link") == 0) new->flags |= CONTEXT_RA_OFF_LINK; else if (leasepos == 1 && inet_pton(AF_INET6, a[leasepos], &new->end6)) new->flags |= CONTEXT_DHCP; else if (strstr(a[leasepos], "constructor:") == a[leasepos]) { new->template_interface = opt_string_alloc(a[leasepos] + 12); new->flags |= CONTEXT_TEMPLATE; } else break; } /* bare integer < 128 is prefix value */ if (leasepos < k) { int pref; for (cp = a[leasepos]; *cp; cp++) if (!(*cp >= '0' && *cp <= '9')) break; if (!*cp && (pref = atoi(a[leasepos])) <= 128) { new->prefix = pref; leasepos++; } } if (new->prefix > 64) { if (new->flags & CONTEXT_RA) err=(_("prefix length must be exactly 64 for RA subnets")); else if (new->flags & CONTEXT_TEMPLATE) err=(_("prefix length must be exactly 64 for subnet constructors")); } else if (new->prefix < 64) err=(_("prefix length must be at least 64")); if (!err && !is_same_net6(&new->start6, &new->end6, new->prefix)) err=(_("inconsistent DHCPv6 range")); if (err) { dhcp_context_free(new); ret_err(err); } /* dhcp-range=:: enables DHCP stateless on any interface */ if (IN6_IS_ADDR_UNSPECIFIED(&new->start6) && !(new->flags & CONTEXT_TEMPLATE)) new->prefix = 0; if (new->flags & CONTEXT_TEMPLATE) { struct in6_addr zero; memset(&zero, 0, sizeof(zero)); if (!is_same_net6(&zero, &new->start6, new->prefix)) { dhcp_context_free(new); ret_err(_("prefix must be zero with \"constructor:\" argument")); } } if (addr6part(&new->start6) > addr6part(&new->end6)) { struct in6_addr tmp = new->start6; new->start6 = new->end6; new->end6 = tmp; } } #endif else { dhcp_context_free(new); ret_err(_("bad dhcp-range")); } if (leasepos < k) { if (leasepos != k-1) { dhcp_context_free(new); ret_err(_("bad dhcp-range")); } if (strcmp(a[leasepos], "infinite") == 0) { new->lease_time = 0xffffffff; new->flags |= CONTEXT_SETLEASE; } else if (strcmp(a[leasepos], "deprecated") == 0) new->flags |= CONTEXT_DEPRECATE; else { int fac = 1; if (strlen(a[leasepos]) > 0) { switch (a[leasepos][strlen(a[leasepos]) - 1]) { case 'w': case 'W': fac *= 7; /* fall through */ case 'd': case 'D': fac *= 24; /* fall through */ case 'h': case 'H': fac *= 60; /* fall through */ case 'm': case 'M': fac *= 60; /* fall through */ case 's': case 'S': a[leasepos][strlen(a[leasepos]) - 1] = 0; } for (cp = a[leasepos]; *cp; cp++) if (!(*cp >= '0' && *cp <= '9')) break; if (*cp || (leasepos+1 < k)) ret_err_free(_("bad dhcp-range"), new); new->lease_time = atoi(a[leasepos]) * fac; new->flags |= CONTEXT_SETLEASE; /* Leases of a minute or less confuse some clients, notably Apple's */ if (new->lease_time < 120) new->lease_time = 120; } } } break; } case LOPT_BANK: case 'G': /* --dhcp-host */ { struct dhcp_config *new; struct in_addr in; new = opt_malloc(sizeof(struct dhcp_config)); new->next = daemon->dhcp_conf; new->flags = (option == LOPT_BANK) ? CONFIG_BANK : 0; new->hwaddr = NULL; new->netid = NULL; new->filter = NULL; new->clid = NULL; #ifdef HAVE_DHCP6 new->addr6 = NULL; #endif while (arg) { comma = split(arg); if (strchr(arg, ':')) /* ethernet address, netid or binary CLID */ { if ((arg[0] == 'i' || arg[0] == 'I') && (arg[1] == 'd' || arg[1] == 'D') && arg[2] == ':') { if (arg[3] == '*') new->flags |= CONFIG_NOCLID; else { int len; arg += 3; /* dump id: */ if (strchr(arg, ':')) len = parse_hex(arg, (unsigned char *)arg, -1, NULL, NULL); else { unhide_metas(arg); len = (int) strlen(arg); } if (len == -1) { dhcp_config_free(new); ret_err(_("bad hex constant")); } else if ((new->clid = opt_malloc(len))) { new->flags |= CONFIG_CLID; new->clid_len = len; memcpy(new->clid, arg, len); } } } /* dhcp-host has strange backwards-compat needs. */ else if (strstr(arg, "net:") == arg || strstr(arg, "set:") == arg) { struct dhcp_netid_list *newlist = opt_malloc(sizeof(struct dhcp_netid_list)); newlist->next = new->netid; new->netid = newlist; newlist->list = dhcp_netid_create(arg+4, NULL); } else if (strstr(arg, "tag:") == arg) new->filter = dhcp_netid_create(arg+4, new->filter); #ifdef HAVE_DHCP6 else if (arg[0] == '[' && arg[strlen(arg)-1] == ']') { char *pref; struct in6_addr in6; struct addrlist *new_addr; arg[strlen(arg)-1] = 0; arg++; pref = split_chr(arg, '/'); if (!inet_pton(AF_INET6, arg, &in6)) { dhcp_config_free(new); ret_err(_("bad IPv6 address")); } new_addr = opt_malloc(sizeof(struct addrlist)); new_addr->next = new->addr6; new_addr->flags = 0; new_addr->addr.addr6 = in6; new->addr6 = new_addr; if (pref) { u64 addrpart = addr6part(&in6); if (!atoi_check(pref, &new_addr->prefixlen) || new_addr->prefixlen > 128 || ((((u64)1<<(128-new_addr->prefixlen))-1) & addrpart) != 0) { dhcp_config_free(new); ret_err(_("bad IPv6 prefix")); } new_addr->flags |= ADDRLIST_PREFIX; } for (i= 0; i < 8; i++) if (in6.s6_addr[i] != 0) break; /* set WILDCARD if network part all zeros */ if (i == 8) new_addr->flags |= ADDRLIST_WILDCARD; new->flags |= CONFIG_ADDR6; } #endif else { struct hwaddr_config *newhw = opt_malloc(sizeof(struct hwaddr_config)); if ((newhw->hwaddr_len = parse_hex(arg, newhw->hwaddr, DHCP_CHADDR_MAX, &newhw->wildcard_mask, &newhw->hwaddr_type)) == -1) { free(newhw); dhcp_config_free(new); ret_err(_("bad hex constant")); } else { newhw->next = new->hwaddr; new->hwaddr = newhw; } } } else if (strchr(arg, '.') && (inet_pton(AF_INET, arg, &in) > 0)) { struct dhcp_config *configs; new->addr = in; new->flags |= CONFIG_ADDR; /* If the same IP appears in more than one host config, then DISCOVER for one of the hosts will get the address, but REQUEST will be NAKed, since the address is reserved by the other one -> protocol loop. */ for (configs = daemon->dhcp_conf; configs; configs = configs->next) if ((configs->flags & CONFIG_ADDR) && configs->addr.s_addr == in.s_addr) { inet_ntop(AF_INET, &in, daemon->addrbuff, ADDRSTRLEN); sprintf(errstr, _("duplicate dhcp-host IP address %s"), daemon->addrbuff); return 0; } } else { char *cp, *lastp = NULL, last = 0; int fac = 1, isdig = 0; if (strlen(arg) > 1) { lastp = arg + strlen(arg) - 1; last = *lastp; switch (last) { case 'w': case 'W': fac *= 7; /* fall through */ case 'd': case 'D': fac *= 24; /* fall through */ case 'h': case 'H': fac *= 60; /* fall through */ case 'm': case 'M': fac *= 60; /* fall through */ case 's': case 'S': *lastp = 0; } } for (cp = arg; *cp; cp++) if (isdigit((unsigned char)*cp)) isdig = 1; else if (*cp != ' ') break; if (*cp) { if (lastp) *lastp = last; if (strcmp(arg, "infinite") == 0) { new->lease_time = 0xffffffff; new->flags |= CONFIG_TIME; } else if (strcmp(arg, "ignore") == 0) new->flags |= CONFIG_DISABLE; else { if (!(new->hostname = canonicalise_opt(arg)) || !legal_hostname(new->hostname)) { dhcp_config_free(new); ret_err(_("bad DHCP host name")); } new->flags |= CONFIG_NAME; new->domain = strip_hostname(new->hostname); } } else if (isdig) { new->lease_time = atoi(arg) * fac; /* Leases of a minute or less confuse some clients, notably Apple's */ if (new->lease_time < 120) new->lease_time = 120; new->flags |= CONFIG_TIME; } } arg = comma; } daemon->dhcp_conf = new; break; } case LOPT_TAG_IF: /* --tag-if */ { struct tag_if *new = opt_malloc(sizeof(struct tag_if)); new->tag = NULL; new->set = NULL; new->next = NULL; /* preserve order */ if (!daemon->tag_if) daemon->tag_if = new; else { struct tag_if *tmp; for (tmp = daemon->tag_if; tmp->next; tmp = tmp->next); tmp->next = new; } while (arg) { size_t len; comma = split(arg); len = strlen(arg); if (len < 5) { new->set = NULL; break; } else { struct dhcp_netid *newtag = dhcp_netid_create(arg+4, NULL); if (strstr(arg, "set:") == arg) { struct dhcp_netid_list *newlist = opt_malloc(sizeof(struct dhcp_netid_list)); newlist->next = new->set; new->set = newlist; newlist->list = newtag; } else if (strstr(arg, "tag:") == arg) { newtag->next = new->tag; new->tag = newtag; } else { new->set = NULL; dhcp_netid_free(newtag); break; } } arg = comma; } if (!new->set) { dhcp_netid_free(new->tag); dhcp_netid_list_free(new->set); ret_err_free(_("bad tag-if"), new); } break; } case 'O': /* --dhcp-option */ case LOPT_FORCE: /* --dhcp-option-force */ case LOPT_OPTS: case LOPT_MATCH: /* --dhcp-match */ return parse_dhcp_opt(errstr, arg, option == LOPT_FORCE ? DHOPT_FORCE : (option == LOPT_MATCH ? DHOPT_MATCH : (option == LOPT_OPTS ? DHOPT_BANK : 0))); case LOPT_NAME_MATCH: /* --dhcp-name-match */ { struct dhcp_match_name *new = opt_malloc(sizeof(struct dhcp_match_name)); struct dhcp_netid *id = opt_malloc(sizeof(struct dhcp_netid)); ssize_t len; if (!(comma = split(arg)) || (len = strlen(comma)) == 0) ret_err(gen_err); new->wildcard = 0; new->netid = id; id->net = opt_string_alloc(set_prefix(arg)); if (comma[len-1] == '*') { comma[len-1] = 0; new->wildcard = 1; } new->name = opt_string_alloc(comma); new->next = daemon->dhcp_name_match; daemon->dhcp_name_match = new; break; } case 'M': /* --dhcp-boot */ { struct dhcp_netid *id = dhcp_tags(&arg); if (!arg) { ret_err(gen_err); } else { char *dhcp_file, *dhcp_sname = NULL, *tftp_sname = NULL; struct in_addr dhcp_next_server; struct dhcp_boot *new; comma = split(arg); dhcp_file = opt_string_alloc(arg); dhcp_next_server.s_addr = 0; if (comma) { arg = comma; comma = split(arg); dhcp_sname = opt_string_alloc(arg); if (comma) { unhide_metas(comma); if (!(inet_pton(AF_INET, comma, &dhcp_next_server) > 0)) { /* * The user may have specified the tftp hostname here. * save it so that it can be resolved/looked up during * actual dhcp_reply(). */ tftp_sname = opt_string_alloc(comma); dhcp_next_server.s_addr = 0; } } } new = opt_malloc(sizeof(struct dhcp_boot)); new->file = dhcp_file; new->sname = dhcp_sname; new->tftp_sname = tftp_sname; new->next_server = dhcp_next_server; new->netid = id; new->next = daemon->boot_config; daemon->boot_config = new; } break; } case LOPT_REPLY_DELAY: /* --dhcp-reply-delay */ { struct dhcp_netid *id = dhcp_tags(&arg); if (!arg) { ret_err(gen_err); } else { struct delay_config *new; int delay; if (!atoi_check(arg, &delay)) ret_err(gen_err); new = opt_malloc(sizeof(struct delay_config)); new->delay = delay; new->netid = id; new->next = daemon->delay_conf; daemon->delay_conf = new; } break; } case LOPT_PXE_PROMT: /* --pxe-prompt */ { struct dhcp_opt *new = opt_malloc(sizeof(struct dhcp_opt)); int timeout; new->netid = NULL; new->opt = 10; /* PXE_MENU_PROMPT */ new->netid = dhcp_tags(&arg); if (!arg) { dhcp_opt_free(new); ret_err(gen_err); } else { comma = split(arg); unhide_metas(arg); new->len = strlen(arg) + 1; new->val = opt_malloc(new->len); memcpy(new->val + 1, arg, new->len - 1); new->u.vendor_class = NULL; new->flags = DHOPT_VENDOR | DHOPT_VENDOR_PXE; if (comma && atoi_check(comma, &timeout)) *(new->val) = timeout; else *(new->val) = 255; new->next = daemon->dhcp_opts; daemon->dhcp_opts = new; daemon->enable_pxe = 1; } break; } case LOPT_PXE_SERV: /* --pxe-service */ { struct pxe_service *new = opt_malloc(sizeof(struct pxe_service)); char *CSA[] = { "x86PC", "PC98", "IA64_EFI", "Alpha", "Arc_x86", "Intel_Lean_Client", "IA32_EFI", "x86-64_EFI", "Xscale_EFI", "BC_EFI", "ARM32_EFI", "ARM64_EFI", NULL }; static int boottype = 32768; new->netid = NULL; new->sname = NULL; new->server.s_addr = 0; new->netid = dhcp_tags(&arg); if (arg && (comma = split(arg))) { for (i = 0; CSA[i]; i++) if (strcasecmp(CSA[i], arg) == 0) break; if (CSA[i] || atoi_check(arg, &i)) { arg = comma; comma = split(arg); new->CSA = i; new->menu = opt_string_alloc(arg); if (!comma) { new->type = 0; /* local boot */ new->basename = NULL; } else { arg = comma; comma = split(arg); if (atoi_check(arg, &i)) { new->type = i; new->basename = NULL; } else { new->type = boottype++; new->basename = opt_string_alloc(arg); } if (comma) { if (!inet_pton(AF_INET, comma, &new->server)) { new->server.s_addr = 0; new->sname = opt_string_alloc(comma); } } } /* Order matters */ new->next = NULL; if (!daemon->pxe_services) daemon->pxe_services = new; else { struct pxe_service *s; for (s = daemon->pxe_services; s->next; s = s->next); s->next = new; } daemon->enable_pxe = 1; break; } } ret_err(gen_err); } case '4': /* --dhcp-mac */ { if (!(comma = split(arg))) ret_err(gen_err); else { struct dhcp_mac *new = opt_malloc(sizeof(struct dhcp_mac)); new->netid.net = opt_string_alloc(set_prefix(arg)); unhide_metas(comma); new->hwaddr_len = parse_hex(comma, new->hwaddr, DHCP_CHADDR_MAX, &new->mask, &new->hwaddr_type); if (new->hwaddr_len == -1) { free(new->netid.net); ret_err_free(gen_err, new); } else { new->next = daemon->dhcp_macs; daemon->dhcp_macs = new; } } } break; case 'U': /* --dhcp-vendorclass */ case 'j': /* --dhcp-userclass */ case LOPT_CIRCUIT: /* --dhcp-circuitid */ case LOPT_REMOTE: /* --dhcp-remoteid */ case LOPT_SUBSCR: /* --dhcp-subscrid */ { unsigned char *p; int dig = 0; struct dhcp_vendor *new = opt_malloc(sizeof(struct dhcp_vendor)); if (!(comma = split(arg))) ret_err_free(gen_err, new); new->netid.net = opt_string_alloc(set_prefix(arg)); /* check for hex string - must digits may include : must not have nothing else, only allowed for agent-options. */ arg = comma; if ((comma = split(arg))) { if (option != 'U' || strstr(arg, "enterprise:") != arg) { free(new->netid.net); ret_err_free(gen_err, new); } else new->enterprise = atoi(arg+11); } else comma = arg; for (p = (unsigned char *)comma; *p; p++) if (isxdigit(*p)) dig = 1; else if (*p != ':') break; unhide_metas(comma); if (option == 'U' || option == 'j' || *p || !dig) { new->len = strlen(comma); new->data = opt_malloc(new->len); memcpy(new->data, comma, new->len); } else { new->len = parse_hex(comma, (unsigned char *)comma, strlen(comma), NULL, NULL); new->data = opt_malloc(new->len); memcpy(new->data, comma, new->len); } switch (option) { case 'j': new->match_type = MATCH_USER; break; case 'U': new->match_type = MATCH_VENDOR; break; case LOPT_CIRCUIT: new->match_type = MATCH_CIRCUIT; break; case LOPT_REMOTE: new->match_type = MATCH_REMOTE; break; case LOPT_SUBSCR: new->match_type = MATCH_SUBSCRIBER; break; } new->next = daemon->dhcp_vendors; daemon->dhcp_vendors = new; break; } case LOPT_ALTPORT: /* --dhcp-alternate-port */ if (!arg) { daemon->dhcp_server_port = DHCP_SERVER_ALTPORT; daemon->dhcp_client_port = DHCP_CLIENT_ALTPORT; } else { comma = split(arg); if (!atoi_check16(arg, &daemon->dhcp_server_port) || (comma && !atoi_check16(comma, &daemon->dhcp_client_port))) ret_err(_("invalid port number")); if (!comma) daemon->dhcp_client_port = daemon->dhcp_server_port+1; } break; case 'J': /* --dhcp-ignore */ case LOPT_NO_NAMES: /* --dhcp-ignore-names */ case LOPT_BROADCAST: /* --dhcp-broadcast */ case '3': /* --bootp-dynamic */ case LOPT_GEN_NAMES: /* --dhcp-generate-names */ { struct dhcp_netid_list *new = opt_malloc(sizeof(struct dhcp_netid_list)); struct dhcp_netid *list = NULL; if (option == 'J') { new->next = daemon->dhcp_ignore; daemon->dhcp_ignore = new; } else if (option == LOPT_BROADCAST) { new->next = daemon->force_broadcast; daemon->force_broadcast = new; } else if (option == '3') { new->next = daemon->bootp_dynamic; daemon->bootp_dynamic = new; } else if (option == LOPT_GEN_NAMES) { new->next = daemon->dhcp_gen_names; daemon->dhcp_gen_names = new; } else { new->next = daemon->dhcp_ignore_names; daemon->dhcp_ignore_names = new; } while (arg) { comma = split(arg); list = dhcp_netid_create(is_tag_prefix(arg) ? arg+4 :arg, list); arg = comma; } new->list = list; break; } case LOPT_PROXY: /* --dhcp-proxy */ daemon->override = 1; while (arg) { struct addr_list *new = opt_malloc(sizeof(struct addr_list)); comma = split(arg); if (!(inet_pton(AF_INET, arg, &new->addr) > 0)) ret_err_free(_("bad dhcp-proxy address"), new); new->next = daemon->override_relays; daemon->override_relays = new; arg = comma; } break; case LOPT_PXE_VENDOR: /* --dhcp-pxe-vendor */ { while (arg) { struct dhcp_pxe_vendor *new = opt_malloc(sizeof(struct dhcp_pxe_vendor)); comma = split(arg); new->data = opt_string_alloc(arg); new->next = daemon->dhcp_pxe_vendors; daemon->dhcp_pxe_vendors = new; arg = comma; } } break; case LOPT_RELAY: /* --dhcp-relay */ { struct dhcp_relay *new = opt_malloc(sizeof(struct dhcp_relay)); comma = split(arg); new->interface = opt_string_alloc(split(comma)); new->iface_index = 0; if (comma && inet_pton(AF_INET, arg, &new->local) && inet_pton(AF_INET, comma, &new->server)) { new->next = daemon->relay4; daemon->relay4 = new; } #ifdef HAVE_DHCP6 else if (comma && inet_pton(AF_INET6, arg, &new->local) && inet_pton(AF_INET6, comma, &new->server)) { new->next = daemon->relay6; daemon->relay6 = new; } #endif else { free(new->interface); ret_err_free(_("Bad dhcp-relay"), new); } break; } #endif #ifdef HAVE_DHCP6 case LOPT_RA_PARAM: /* --ra-param */ if ((comma = split(arg))) { struct ra_interface *new = opt_malloc(sizeof(struct ra_interface)); new->lifetime = -1; new->prio = 0; new->mtu = 0; new->mtu_name = NULL; new->name = opt_string_alloc(arg); if (strcasestr(comma, "mtu:") == comma) { arg = comma + 4; if (!(comma = split(comma))) goto err; if (!strcasecmp(arg, "off")) new->mtu = -1; else if (!atoi_check(arg, &new->mtu)) new->mtu_name = opt_string_alloc(arg); else if (new->mtu < 1280) goto err; } if (strcasestr(comma, "high") == comma || strcasestr(comma, "low") == comma) { if (*comma == 'l' || *comma == 'L') new->prio = 0x18; else new->prio = 0x08; comma = split(comma); } arg = split(comma); if (!atoi_check(comma, &new->interval) || (arg && !atoi_check(arg, &new->lifetime))) { err: free(new->name); ret_err_free(_("bad RA-params"), new); } new->next = daemon->ra_interfaces; daemon->ra_interfaces = new; } break; case LOPT_DUID: /* --dhcp-duid */ if (!(comma = split(arg)) || !atoi_check(arg, (int *)&daemon->duid_enterprise)) ret_err(_("bad DUID")); else { daemon->duid_config_len = parse_hex(comma,(unsigned char *)comma, strlen(comma), NULL, NULL); daemon->duid_config = opt_malloc(daemon->duid_config_len); memcpy(daemon->duid_config, comma, daemon->duid_config_len); } break; #endif case 'V': /* --alias */ { char *dash, *a[3] = { NULL, NULL, NULL }; int k = 0; struct doctor *new = opt_malloc(sizeof(struct doctor)); new->next = daemon->doctors; daemon->doctors = new; new->mask.s_addr = 0xffffffff; new->end.s_addr = 0; if ((a[0] = arg)) for (k = 1; k < 3; k++) { if (!(a[k] = split(a[k-1]))) break; unhide_metas(a[k]); } dash = split_chr(a[0], '-'); if ((k < 2) || (!(inet_pton(AF_INET, a[0], &new->in) > 0)) || (!(inet_pton(AF_INET, a[1], &new->out) > 0)) || (k == 3 && !inet_pton(AF_INET, a[2], &new->mask))) ret_err(_("missing address in alias")); if (dash && (!(inet_pton(AF_INET, dash, &new->end) > 0) || !is_same_net(new->in, new->end, new->mask) || ntohl(new->in.s_addr) > ntohl(new->end.s_addr))) ret_err_free(_("invalid alias range"), new); break; } case LOPT_INTNAME: /* --interface-name */ case LOPT_DYNHOST: /* --dynamic-host */ { struct interface_name *new, **up; char *domain = arg; arg = split(arg); new = opt_malloc(sizeof(struct interface_name)); memset(new, 0, sizeof(struct interface_name)); new->flags = IN4 | IN6; /* Add to the end of the list, so that first name of an interface is used for PTR lookups. */ for (up = &daemon->int_names; *up; up = &((*up)->next)); *up = new; while ((comma = split(arg))) { if (inet_pton(AF_INET, arg, &new->proto4)) new->flags |= INP4; else if (inet_pton(AF_INET6, arg, &new->proto6)) new->flags |= INP6; else break; arg = comma; } if ((comma = split_chr(arg, '/'))) { if (strcmp(comma, "4") == 0) new->flags &= ~IN6; else if (strcmp(comma, "6") == 0) new->flags &= ~IN4; else ret_err_free(gen_err, new); } new->intr = opt_string_alloc(arg); if (option == LOPT_DYNHOST) { if (!(new->flags & (INP4 | INP6))) ret_err(_("missing address in dynamic host")); if (!(new->flags & IN4) || !(new->flags & IN6)) arg = NULL; /* provoke error below */ new->flags &= ~(IN4 | IN6); } else { if (new->flags & (INP4 | INP6)) arg = NULL; /* provoke error below */ } if (!domain || !arg || !(new->name = canonicalise_opt(domain))) ret_err(option == LOPT_DYNHOST ? _("bad dynamic host") : _("bad interface name")); break; } case LOPT_CNAME: /* --cname */ { struct cname *new; char *alias, *target, *last, *pen; int ttl = -1; for (last = pen = NULL, comma = arg; comma; comma = split(comma)) { pen = last; last = comma; } if (!pen) ret_err(_("bad CNAME")); if (pen != arg && atoi_check(last, &ttl)) last = pen; target = canonicalise_opt(last); while (arg != last) { int arglen = strlen(arg); alias = canonicalise_opt(arg); if (!alias || !target) { free(target); free(alias); ret_err(_("bad CNAME")); } for (new = daemon->cnames; new; new = new->next) if (hostname_isequal(new->alias, alias)) { free(target); free(alias); ret_err(_("duplicate CNAME")); } new = opt_malloc(sizeof(struct cname)); new->next = daemon->cnames; daemon->cnames = new; new->alias = alias; new->target = target; new->ttl = ttl; for (arg += arglen+1; *arg && isspace(*arg); arg++); } break; } case LOPT_PTR: /* --ptr-record */ { struct ptr_record *new; char *dom, *target = NULL; comma = split(arg); if (!(dom = canonicalise_opt(arg)) || (comma && !(target = canonicalise_opt(comma)))) { free(dom); free(target); ret_err(_("bad PTR record")); } else { new = opt_malloc(sizeof(struct ptr_record)); new->next = daemon->ptr; daemon->ptr = new; new->name = dom; new->ptr = target; } break; } case LOPT_NAPTR: /* --naptr-record */ { char *a[7] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL }; int k = 0; struct naptr *new; int order, pref; char *name=NULL, *replace = NULL; if ((a[0] = arg)) for (k = 1; k < 7; k++) if (!(a[k] = split(a[k-1]))) break; if (k < 6 || !(name = canonicalise_opt(a[0])) || !atoi_check16(a[1], &order) || !atoi_check16(a[2], &pref) || (k == 7 && !(replace = canonicalise_opt(a[6])))) { free(name); free(replace); ret_err(_("bad NAPTR record")); } else { new = opt_malloc(sizeof(struct naptr)); new->next = daemon->naptr; daemon->naptr = new; new->name = name; new->flags = opt_string_alloc(a[3]); new->services = opt_string_alloc(a[4]); new->regexp = opt_string_alloc(a[5]); new->replace = replace; new->order = order; new->pref = pref; } break; } case LOPT_RR: /* dns-rr */ { struct txt_record *new; size_t len = 0; char *data; int class; comma = split(arg); data = split(comma); new = opt_malloc(sizeof(struct txt_record)); new->name = NULL; if (!atoi_check(comma, &class) || !(new->name = canonicalise_opt(arg)) || (data && (len = parse_hex(data, (unsigned char *)data, -1, NULL, NULL)) == -1U)) { free(new->name); ret_err_free(_("bad RR record"), new); } new->len = 0; new->class = class; new->next = daemon->rr; daemon->rr = new; if (data) { new->txt = opt_malloc(len); new->len = len; memcpy(new->txt, data, len); } break; } case LOPT_CAA: /* --caa-record */ { struct txt_record *new; char *tag, *value; int flags; comma = split(arg); tag = split(comma); value = split(tag); new = opt_malloc(sizeof(struct txt_record)); new->next = daemon->rr; daemon->rr = new; if (!atoi_check(comma, &flags) || !tag || !value || !(new->name = canonicalise_opt(arg))) ret_err(_("bad CAA record")); unhide_metas(tag); unhide_metas(value); new->len = strlen(tag) + strlen(value) + 2; new->txt = opt_malloc(new->len); new->txt[0] = flags; new->txt[1] = strlen(tag); memcpy(&new->txt[2], tag, strlen(tag)); memcpy(&new->txt[2 + strlen(tag)], value, strlen(value)); new->class = T_CAA; break; } case 'Y': /* --txt-record */ { struct txt_record *new; unsigned char *p, *cnt; size_t len; comma = split(arg); new = opt_malloc(sizeof(struct txt_record)); new->class = C_IN; new->stat = 0; if (!(new->name = canonicalise_opt(arg))) ret_err_free(_("bad TXT record"), new); new->next = daemon->txt; daemon->txt = new; len = comma ? strlen(comma) : 0; len += (len/255) + 1; /* room for extra counts */ new->txt = p = opt_malloc(len); cnt = p++; *cnt = 0; while (comma && *comma) { unsigned char c = (unsigned char)*comma++; if (c == ',' || *cnt == 255) { if (c != ',') comma--; cnt = p++; *cnt = 0; } else { *p++ = unhide_meta(c); (*cnt)++; } } new->len = p - new->txt; break; } case 'W': /* --srv-host */ { int port = 1, priority = 0, weight = 0; char *name, *target = NULL; struct mx_srv_record *new; comma = split(arg); if (!(name = canonicalise_opt(arg))) ret_err(_("bad SRV record")); if (comma) { arg = comma; comma = split(arg); if (!(target = canonicalise_opt(arg))) ret_err_free(_("bad SRV target"), name); if (comma) { arg = comma; comma = split(arg); if (!atoi_check16(arg, &port)) { free(name); ret_err_free(_("invalid port number"), target); } if (comma) { arg = comma; comma = split(arg); if (!atoi_check16(arg, &priority)) { free(name); ret_err_free(_("invalid priority"), target); } if (comma && !atoi_check16(comma, &weight)) { free(name); ret_err_free(_("invalid weight"), target); } } } } new = opt_malloc(sizeof(struct mx_srv_record)); new->next = daemon->mxnames; daemon->mxnames = new; new->issrv = 1; new->name = name; new->target = target; new->srvport = port; new->priority = priority; new->weight = weight; break; } case LOPT_HOST_REC: /* --host-record */ { struct host_record *new; if (!arg || !(comma = split(arg))) ret_err(_("Bad host-record")); new = opt_malloc(sizeof(struct host_record)); memset(new, 0, sizeof(struct host_record)); new->ttl = -1; new->flags = 0; while (arg) { union all_addr addr; char *dig; for (dig = arg; *dig != 0; dig++) if (*dig < '0' || *dig > '9') break; if (*dig == 0) new->ttl = atoi(arg); else if (inet_pton(AF_INET, arg, &addr.addr4)) { new->addr = addr.addr4; new->flags |= HR_4; } else if (inet_pton(AF_INET6, arg, &addr.addr6)) { new->addr6 = addr.addr6; new->flags |= HR_6; } else { char *canon = canonicalise_opt(arg); struct name_list *nl; if (!canon) { struct name_list *tmp = new->names, *next; for (tmp = new->names; tmp; tmp = next) { next = tmp->next; free(tmp); } ret_err_free(_("Bad name in host-record"), new); } nl = opt_malloc(sizeof(struct name_list)); nl->name = canon; /* keep order, so that PTR record goes to first name */ nl->next = NULL; if (!new->names) new->names = nl; else { struct name_list *tmp; for (tmp = new->names; tmp->next; tmp = tmp->next); tmp->next = nl; } } arg = comma; comma = split(arg); } /* Keep list order */ if (!daemon->host_records_tail) daemon->host_records = new; else daemon->host_records_tail->next = new; new->next = NULL; daemon->host_records_tail = new; break; } #ifdef HAVE_DNSSEC case LOPT_DNSSEC_STAMP: /* --dnssec-timestamp */ daemon->timestamp_file = opt_string_alloc(arg); break; case LOPT_DNSSEC_CHECK: /* --dnssec-check-unsigned */ if (arg) { if (strcmp(arg, "no") == 0) set_option_bool(OPT_DNSSEC_IGN_NS); else ret_err(_("bad value for dnssec-check-unsigned")); } break; case LOPT_TRUST_ANCHOR: /* --trust-anchor */ { struct ds_config *new = opt_malloc(sizeof(struct ds_config)); char *cp, *cp1, *keyhex, *digest, *algo = NULL; int len; new->class = C_IN; new->name = NULL; if ((comma = split(arg)) && (algo = split(comma))) { int class = 0; if (strcmp(comma, "IN") == 0) class = C_IN; else if (strcmp(comma, "CH") == 0) class = C_CHAOS; else if (strcmp(comma, "HS") == 0) class = C_HESIOD; if (class != 0) { new->class = class; comma = algo; algo = split(comma); } } if (!comma || !algo || !(digest = split(algo)) || !(keyhex = split(digest)) || !atoi_check16(comma, &new->keytag) || !atoi_check8(algo, &new->algo) || !atoi_check8(digest, &new->digest_type) || !(new->name = canonicalise_opt(arg))) ret_err_free(_("bad trust anchor"), new); /* Upper bound on length */ len = (2*strlen(keyhex))+1; new->digest = opt_malloc(len); unhide_metas(keyhex); /* 4034: "Whitespace is allowed within digits" */ for (cp = keyhex; *cp; ) if (isspace(*cp)) for (cp1 = cp; *cp1; cp1++) *cp1 = *(cp1+1); else cp++; if ((new->digestlen = parse_hex(keyhex, (unsigned char *)new->digest, len, NULL, NULL)) == -1) { free(new->name); ret_err_free(_("bad HEX in trust anchor"), new); } new->next = daemon->ds; daemon->ds = new; break; } #endif default: ret_err(_("unsupported option (check that dnsmasq was compiled with DHCP/TFTP/DNSSEC/DBus support)")); } return 1; } static void read_file(char *file, FILE *f, int hard_opt) { volatile int lineno = 0; char *buff = daemon->namebuff; while (fgets(buff, MAXDNAME, f)) { int white, i; volatile int option = (hard_opt == LOPT_REV_SERV) ? 0 : hard_opt; char *errmess, *p, *arg, *start; size_t len; /* Memory allocation failure longjmps here if mem_recover == 1 */ if (option != 0 || hard_opt == LOPT_REV_SERV) { if (setjmp(mem_jmp)) continue; mem_recover = 1; } arg = NULL; lineno++; errmess = NULL; /* Implement quotes, inside quotes we allow \\ \" \n and \t metacharacters get hidden also strip comments */ for (white = 1, p = buff; *p; p++) { if (*p == '"') { memmove(p, p+1, strlen(p+1)+1); for(; *p && *p != '"'; p++) { if (*p == '\\' && strchr("\"tnebr\\", p[1])) { if (p[1] == 't') p[1] = '\t'; else if (p[1] == 'n') p[1] = '\n'; else if (p[1] == 'b') p[1] = '\b'; else if (p[1] == 'r') p[1] = '\r'; else if (p[1] == 'e') /* escape */ p[1] = '\033'; memmove(p, p+1, strlen(p+1)+1); } *p = hide_meta(*p); } if (*p == 0) { errmess = _("missing \""); goto oops; } memmove(p, p+1, strlen(p+1)+1); } if (isspace(*p)) { *p = ' '; white = 1; } else { if (white && *p == '#') { *p = 0; break; } white = 0; } } /* strip leading spaces */ for (start = buff; *start && *start == ' '; start++); /* strip trailing spaces */ for (len = strlen(start); (len != 0) && (start[len-1] == ' '); len--); if (len == 0) continue; else start[len] = 0; if (option != 0) arg = start; else if ((p=strchr(start, '='))) { /* allow spaces around "=" */ for (arg = p+1; *arg == ' '; arg++); for (; p >= start && (*p == ' ' || *p == '='); p--) *p = 0; } else arg = NULL; if (option == 0) { for (option = 0, i = 0; opts[i].name; i++) if (strcmp(opts[i].name, start) == 0) { option = opts[i].val; break; } if (!option) errmess = _("bad option"); else if (opts[i].has_arg == 0 && arg) errmess = _("extraneous parameter"); else if (opts[i].has_arg == 1 && !arg) errmess = _("missing parameter"); else if (hard_opt == LOPT_REV_SERV && option != 'S' && option != LOPT_REV_SERV) errmess = _("illegal option"); } oops: if (errmess) strcpy(daemon->namebuff, errmess); if (errmess || !one_opt(option, arg, daemon->namebuff, _("error"), 0, hard_opt == LOPT_REV_SERV)) { sprintf(daemon->namebuff + strlen(daemon->namebuff), _(" at line %d of %s"), lineno, file); if (hard_opt != 0) my_syslog(LOG_ERR, "%s", daemon->namebuff); else die("%s", daemon->namebuff, EC_BADCONF); } } mem_recover = 0; fclose(f); } #if defined(HAVE_DHCP) && defined(HAVE_INOTIFY) int option_read_dynfile(char *file, int flags) { my_syslog(MS_DHCP | LOG_INFO, _("read %s"), file); if (flags & AH_DHCP_HST) return one_file(file, LOPT_BANK); else if (flags & AH_DHCP_OPT) return one_file(file, LOPT_OPTS); return 0; } #endif static int one_file(char *file, int hard_opt) { FILE *f; int nofile_ok = 0; static int read_stdin = 0; static struct fileread { dev_t dev; ino_t ino; struct fileread *next; } *filesread = NULL; if (hard_opt == '7') { /* default conf-file reading */ hard_opt = 0; nofile_ok = 1; } if (hard_opt == 0 && strcmp(file, "-") == 0) { if (read_stdin == 1) return 1; read_stdin = 1; file = "stdin"; f = stdin; } else { /* ignore repeated files. */ struct stat statbuf; if (hard_opt == 0 && stat(file, &statbuf) == 0) { struct fileread *r; for (r = filesread; r; r = r->next) if (r->dev == statbuf.st_dev && r->ino == statbuf.st_ino) return 1; r = safe_malloc(sizeof(struct fileread)); r->next = filesread; filesread = r; r->dev = statbuf.st_dev; r->ino = statbuf.st_ino; } if (!(f = fopen(file, "r"))) { if (errno == ENOENT && nofile_ok) return 1; /* No conffile, all done. */ else { char *str = _("cannot read %s: %s"); if (hard_opt != 0) { my_syslog(LOG_ERR, str, file, strerror(errno)); return 0; } else die(str, file, EC_FILE); } } } read_file(file, f, hard_opt); return 1; } static int file_filter(const struct dirent *ent) { size_t lenfile = strlen(ent->d_name); /* ignore emacs backups and dotfiles */ if (lenfile == 0 || ent->d_name[lenfile - 1] == '~' || (ent->d_name[0] == '#' && ent->d_name[lenfile - 1] == '#') || ent->d_name[0] == '.') return 0; return 1; } /* expand any name which is a directory */ struct hostsfile *expand_filelist(struct hostsfile *list) { unsigned int i; int entcnt, n; struct hostsfile *ah, *last, *next, **up; struct dirent **namelist; /* find largest used index */ for (i = SRC_AH, ah = list; ah; ah = ah->next) { last = ah; if (i <= ah->index) i = ah->index + 1; if (ah->flags & AH_DIR) ah->flags |= AH_INACTIVE; else ah->flags &= ~AH_INACTIVE; } for (ah = list; ah; ah = ah->next) if (!(ah->flags & AH_INACTIVE)) { struct stat buf; if (stat(ah->fname, &buf) != -1 && S_ISDIR(buf.st_mode)) { struct dirent *ent; /* don't read this as a file */ ah->flags |= AH_INACTIVE; entcnt = scandir(ah->fname, &namelist, file_filter, alphasort); if (entcnt < 0) my_syslog(LOG_ERR, _("cannot access directory %s: %s"), ah->fname, strerror(errno)); else { for (n = 0; n < entcnt; n++) { ent = namelist[n]; size_t lendir = strlen(ah->fname); size_t lenfile = strlen(ent->d_name); struct hostsfile *ah1; char *path; /* see if we have an existing record. dir is ah->fname file is ent->d_name path to match is ah1->fname */ for (up = &list, ah1 = list; ah1; ah1 = next) { next = ah1->next; if (lendir < strlen(ah1->fname) && strstr(ah1->fname, ah->fname) == ah1->fname && ah1->fname[lendir] == '/' && strcmp(ah1->fname + lendir + 1, ent->d_name) == 0) { ah1->flags &= ~AH_INACTIVE; /* If found, remove from list to re-insert at the end. Unless it's already at the end. */ if (last != ah1) *up = next; break; } up = &ah1->next; } /* make new record */ if (!ah1) { if (!(ah1 = whine_malloc(sizeof(struct hostsfile)))) continue; if (!(path = whine_malloc(lendir + lenfile + 2))) { free(ah1); continue; } strcpy(path, ah->fname); strcat(path, "/"); strcat(path, ent->d_name); ah1->fname = path; ah1->index = i++; ah1->flags = AH_DIR; } /* Edge case, may be the last in the list anyway */ if (last != ah1) last->next = ah1; ah1->next = NULL; last = ah1; /* inactivate record if not regular file */ if ((ah1->flags & AH_DIR) && stat(ah1->fname, &buf) != -1 && !S_ISREG(buf.st_mode)) ah1->flags |= AH_INACTIVE; } } free(namelist); } } return list; } void read_servers_file(void) { FILE *f; if (!(f = fopen(daemon->servers_file, "r"))) { my_syslog(LOG_ERR, _("cannot read %s: %s"), daemon->servers_file, strerror(errno)); return; } mark_servers(SERV_FROM_FILE); read_file(daemon->servers_file, f, LOPT_REV_SERV); cleanup_servers(); check_servers(0); } #ifdef HAVE_DHCP static void clear_dynamic_conf(void) { struct dhcp_config *configs, *cp, **up; /* remove existing... */ for (up = &daemon->dhcp_conf, configs = daemon->dhcp_conf; configs; configs = cp) { cp = configs->next; if (configs->flags & CONFIG_BANK) { *up = cp; dhcp_config_free(configs); } else up = &configs->next; } } static void clear_dynamic_opt(void) { struct dhcp_opt *opts, *cp, **up; for (up = &daemon->dhcp_opts, opts = daemon->dhcp_opts; opts; opts = cp) { cp = opts->next; if (opts->flags & DHOPT_BANK) { *up = cp; dhcp_opt_free(opts); } else up = &opts->next; } } void reread_dhcp(void) { struct hostsfile *hf; /* Do these even if there is no daemon->dhcp_hosts_file or daemon->dhcp_opts_file since entries may have been created by the inotify dynamic file reading system. */ clear_dynamic_conf(); clear_dynamic_opt(); if (daemon->dhcp_hosts_file) { daemon->dhcp_hosts_file = expand_filelist(daemon->dhcp_hosts_file); for (hf = daemon->dhcp_hosts_file; hf; hf = hf->next) if (!(hf->flags & AH_INACTIVE)) { if (one_file(hf->fname, LOPT_BANK)) my_syslog(MS_DHCP | LOG_INFO, _("read %s"), hf->fname); } } if (daemon->dhcp_opts_file) { daemon->dhcp_opts_file = expand_filelist(daemon->dhcp_opts_file); for (hf = daemon->dhcp_opts_file; hf; hf = hf->next) if (!(hf->flags & AH_INACTIVE)) { if (one_file(hf->fname, LOPT_OPTS)) my_syslog(MS_DHCP | LOG_INFO, _("read %s"), hf->fname); } } # ifdef HAVE_INOTIFY /* Setup notify and read pre-existing files. */ set_dynamic_inotify(AH_DHCP_HST | AH_DHCP_OPT, 0, NULL, 0); # endif } #endif void read_opts(int argc, char **argv, char *compile_opts) { size_t argbuf_size = MAXDNAME; char *argbuf = opt_malloc(argbuf_size); char *buff = opt_malloc(MAXDNAME); int option, testmode = 0; char *arg, *conffile = NULL; opterr = 0; daemon = opt_malloc(sizeof(struct daemon)); memset(daemon, 0, sizeof(struct daemon)); daemon->namebuff = buff; daemon->addrbuff = safe_malloc(ADDRSTRLEN); /* Set defaults - everything else is zero or NULL */ daemon->cachesize = CACHESIZ; daemon->ftabsize = FTABSIZ; daemon->port = NAMESERVER_PORT; daemon->dhcp_client_port = DHCP_CLIENT_PORT; daemon->dhcp_server_port = DHCP_SERVER_PORT; daemon->default_resolv.is_default = 1; daemon->default_resolv.name = RESOLVFILE; daemon->resolv_files = &daemon->default_resolv; daemon->username = CHUSER; daemon->runfile = RUNFILE; daemon->dhcp_max = MAXLEASES; daemon->tftp_max = TFTP_MAX_CONNECTIONS; daemon->edns_pktsz = EDNS_PKTSZ; daemon->log_fac = -1; daemon->auth_ttl = AUTH_TTL; daemon->soa_refresh = SOA_REFRESH; daemon->soa_retry = SOA_RETRY; daemon->soa_expiry = SOA_EXPIRY; #ifndef NO_ID add_txt("version.bind", "dnsmasq-" VERSION, 0 ); add_txt("authors.bind", "Simon Kelley", 0); add_txt("copyright.bind", COPYRIGHT, 0); add_txt("cachesize.bind", NULL, TXT_STAT_CACHESIZE); add_txt("insertions.bind", NULL, TXT_STAT_INSERTS); add_txt("evictions.bind", NULL, TXT_STAT_EVICTIONS); add_txt("misses.bind", NULL, TXT_STAT_MISSES); add_txt("hits.bind", NULL, TXT_STAT_HITS); #ifdef HAVE_AUTH add_txt("auth.bind", NULL, TXT_STAT_AUTH); #endif add_txt("servers.bind", NULL, TXT_STAT_SERVERS); #endif while (1) { #ifdef HAVE_GETOPT_LONG option = getopt_long(argc, argv, OPTSTRING, opts, NULL); #else option = getopt(argc, argv, OPTSTRING); #endif if (option == -1) { for (; optind < argc; optind++) { unsigned char *c = (unsigned char *)argv[optind]; for (; *c != 0; c++) if (!isspace(*c)) die(_("junk found in command line"), NULL, EC_BADCONF); } break; } /* Copy optarg so that argv doesn't get changed */ if (optarg) { if (strlen(optarg) >= argbuf_size) { free(argbuf); argbuf_size = strlen(optarg) + 1; argbuf = opt_malloc(argbuf_size); } safe_strncpy(argbuf, optarg, argbuf_size); arg = argbuf; } else arg = NULL; /* command-line only stuff */ if (option == LOPT_TEST) testmode = 1; else if (option == 'w') { #ifdef HAVE_DHCP if (argc == 3 && strcmp(argv[2], "dhcp") == 0) display_opts(); #ifdef HAVE_DHCP6 else if (argc == 3 && strcmp(argv[2], "dhcp6") == 0) display_opts6(); #endif else #endif do_usage(); exit(0); } else if (option == 'v') { printf(_("Dnsmasq version %s %s\n"), VERSION, COPYRIGHT); printf(_("Compile time options: %s\n\n"), compile_opts); printf(_("This software comes with ABSOLUTELY NO WARRANTY.\n")); printf(_("Dnsmasq is free software, and you are welcome to redistribute it\n")); printf(_("under the terms of the GNU General Public License, version 2 or 3.\n")); exit(0); } else if (option == 'C') { if (!conffile) conffile = opt_string_alloc(arg); else { char *extra = opt_string_alloc(arg); one_file(extra, 0); free(extra); } } else { #ifdef HAVE_GETOPT_LONG if (!one_opt(option, arg, daemon->namebuff, _("try --help"), 1, 0)) #else if (!one_opt(option, arg, daemon->namebuff, _("try -w"), 1, 0)) #endif die(_("bad command line options: %s"), daemon->namebuff, EC_BADCONF); } } free(argbuf); if (conffile) { one_file(conffile, 0); free(conffile); } else one_file(CONFFILE, '7'); /* port might not be known when the address is parsed - fill in here */ if (daemon->servers) { struct server *tmp; for (tmp = daemon->servers; tmp; tmp = tmp->next) if (!(tmp->flags & SERV_HAS_SOURCE)) { if (tmp->source_addr.sa.sa_family == AF_INET) tmp->source_addr.in.sin_port = htons(daemon->query_port); else if (tmp->source_addr.sa.sa_family == AF_INET6) tmp->source_addr.in6.sin6_port = htons(daemon->query_port); } } if (daemon->host_records) { struct host_record *hr; for (hr = daemon->host_records; hr; hr = hr->next) if (hr->ttl == -1) hr->ttl = daemon->local_ttl; } if (daemon->cnames) { struct cname *cn, *cn2, *cn3; #define NOLOOP 1 #define TESTLOOP 2 /* Fill in TTL for CNAMES now we have local_ttl. Also prepare to do loop detection. */ for (cn = daemon->cnames; cn; cn = cn->next) { if (cn->ttl == -1) cn->ttl = daemon->local_ttl; cn->flag = 0; cn->targetp = NULL; for (cn2 = daemon->cnames; cn2; cn2 = cn2->next) if (hostname_isequal(cn->target, cn2->alias)) { cn->targetp = cn2; break; } } /* Find any CNAME loops.*/ for (cn = daemon->cnames; cn; cn = cn->next) { for (cn2 = cn->targetp; cn2; cn2 = cn2->targetp) { if (cn2->flag == NOLOOP) break; if (cn2->flag == TESTLOOP) die(_("CNAME loop involving %s"), cn->alias, EC_BADCONF); cn2->flag = TESTLOOP; } for (cn3 = cn->targetp; cn3 != cn2; cn3 = cn3->targetp) cn3->flag = NOLOOP; } } if (daemon->if_addrs) { struct iname *tmp; for(tmp = daemon->if_addrs; tmp; tmp = tmp->next) if (tmp->addr.sa.sa_family == AF_INET) tmp->addr.in.sin_port = htons(daemon->port); else if (tmp->addr.sa.sa_family == AF_INET6) tmp->addr.in6.sin6_port = htons(daemon->port); } /* create default, if not specified */ if (daemon->authserver && !daemon->hostmaster) { strcpy(buff, "hostmaster."); strcat(buff, daemon->authserver); daemon->hostmaster = opt_string_alloc(buff); } if (!daemon->dhcp_pxe_vendors) { daemon->dhcp_pxe_vendors = opt_malloc(sizeof(struct dhcp_pxe_vendor)); daemon->dhcp_pxe_vendors->data = opt_string_alloc(DHCP_PXE_DEF_VENDOR); daemon->dhcp_pxe_vendors->next = NULL; } /* only one of these need be specified: the other defaults to the host-name */ if (option_bool(OPT_LOCALMX) || daemon->mxnames || daemon->mxtarget) { struct mx_srv_record *mx; if (gethostname(buff, MAXDNAME) == -1) die(_("cannot get host-name: %s"), NULL, EC_MISC); for (mx = daemon->mxnames; mx; mx = mx->next) if (!mx->issrv && hostname_isequal(mx->name, buff)) break; if ((daemon->mxtarget || option_bool(OPT_LOCALMX)) && !mx) { mx = opt_malloc(sizeof(struct mx_srv_record)); mx->next = daemon->mxnames; mx->issrv = 0; mx->target = NULL; mx->name = opt_string_alloc(buff); daemon->mxnames = mx; } if (!daemon->mxtarget) daemon->mxtarget = opt_string_alloc(buff); for (mx = daemon->mxnames; mx; mx = mx->next) if (!mx->issrv && !mx->target) mx->target = daemon->mxtarget; } if (!option_bool(OPT_NO_RESOLV) && daemon->resolv_files && daemon->resolv_files->next && option_bool(OPT_NO_POLL)) die(_("only one resolv.conf file allowed in no-poll mode."), NULL, EC_BADCONF); if (option_bool(OPT_RESOLV_DOMAIN)) { char *line; FILE *f; if (option_bool(OPT_NO_RESOLV) || !daemon->resolv_files || (daemon->resolv_files)->next) die(_("must have exactly one resolv.conf to read domain from."), NULL, EC_BADCONF); if (!(f = fopen((daemon->resolv_files)->name, "r"))) die(_("failed to read %s: %s"), (daemon->resolv_files)->name, EC_FILE); while ((line = fgets(buff, MAXDNAME, f))) { char *token = strtok(line, " \t\n\r"); if (!token || strcmp(token, "search") != 0) continue; if ((token = strtok(NULL, " \t\n\r")) && (daemon->domain_suffix = canonicalise_opt(token))) break; } fclose(f); if (!daemon->domain_suffix) die(_("no search directive found in %s"), (daemon->resolv_files)->name, EC_MISC); } if (daemon->domain_suffix) { /* add domain for any srv record without one. */ struct mx_srv_record *srv; for (srv = daemon->mxnames; srv; srv = srv->next) if (srv->issrv && strchr(srv->name, '.') && strchr(srv->name, '.') == strrchr(srv->name, '.')) { strcpy(buff, srv->name); strcat(buff, "."); strcat(buff, daemon->domain_suffix); free(srv->name); srv->name = opt_string_alloc(buff); } } else if (option_bool(OPT_DHCP_FQDN)) die(_("there must be a default domain when --dhcp-fqdn is set"), NULL, EC_BADCONF); /* If there's access-control config, then ignore --local-service, it's intended as a system default to keep otherwise unconfigured installations safe. */ if (daemon->if_names || daemon->if_except || daemon->if_addrs || daemon->authserver) reset_option_bool(OPT_LOCAL_SERVICE); if (testmode) { fprintf(stderr, "dnsmasq: %s.\n", _("syntax check OK")); exit(0); } }