/* * OpenVPN -- An application to securely tunnel IP networks * over a single UDP port, with support for SSL/TLS-based * session authentication and key exchange, * packet encryption, packet authentication, and * packet compression. * * Copyright (C) 2002-2005 OpenVPN Solutions LLC * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * 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 (see the file COPYING included with this * distribution); if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * 2004-01-28: Added Socks5 proxy support * (Christof Meerwald, http://cmeerw.org) */ #ifdef WIN32 #include "config-win32.h" #else #include "config.h" #endif #include "syshead.h" #include "buffer.h" #include "error.h" #include "common.h" #include "shaper.h" #include "crypto.h" #include "ssl.h" #include "options.h" #include "misc.h" #include "socket.h" #include "packet_id.h" #include "pkcs11.h" #include "win32.h" #include "push.h" #include "pool.h" #include "helper.h" #include "manage.h" #include "memdbg.h" const char title_string[] = PACKAGE_STRING " " TARGET_ALIAS #ifdef USE_CRYPTO #ifdef USE_SSL " [SSL]" #else " [CRYPTO]" #endif #endif #ifdef USE_LZO " [LZO" LZO_VERSION_NUM "]" #endif #if EPOLL " [EPOLL]" #endif #ifdef USE_PTHREAD " [PTHREAD]" #endif " built on " __DATE__ ; #ifndef ENABLE_SMALL static const char usage_message[] = "%s\n" "\n" "General Options:\n" "--config file : Read configuration options from file.\n" "--help : Show options.\n" "--version : Show copyright and version information.\n" "\n" "Tunnel Options:\n" "--local host : Local host name or ip address.\n" "--remote host [port] : Remote host name or ip address.\n" "--remote-random : If multiple --remote options specified, choose one randomly.\n" "--mode m : Major mode, m = 'p2p' (default, point-to-point) or 'server'.\n" "--proto p : Use protocol p for communicating with peer.\n" " p = udp (default), tcp-server, or tcp-client\n" "--connect-retry n : For --proto tcp-client, number of seconds to wait\n" " between connection retries (default=%d).\n" #ifdef ENABLE_HTTP_PROXY "--http-proxy s p [up] [auth] : Connect to remote host through an HTTP proxy at\n" " address s and port p. If proxy authentication is required,\n" " up is a file containing username/password on 2 lines, or\n" " 'stdin' to prompt from console. Add auth='ntlm' if\n" " the proxy requires NTLM authentication.\n" "--http-proxy-retry : Retry indefinitely on HTTP proxy errors.\n" "--http-proxy-timeout n : Proxy timeout in seconds, default=5.\n" "--http-proxy-option type [parm] : Set extended HTTP proxy options.\n" " Repeat to set multiple options.\n" " VERSION version (default=1.0)\n" " AGENT user-agent\n" #endif #ifdef ENABLE_SOCKS "--socks-proxy s [p]: Connect to remote host through a Socks5 proxy at address\n" " s and port p (default port = 1080).\n" "--socks-proxy-retry : Retry indefinitely on Socks proxy errors.\n" #endif "--resolv-retry n: If hostname resolve fails for --remote, retry\n" " resolve for n seconds before failing (disabled by default).\n" " Set n=\"infinite\" to retry indefinitely.\n" "--float : Allow remote to change its IP address/port, such as through\n" " DHCP (this is the default if --remote is not used).\n" "--ipchange cmd : Execute shell command cmd on remote ip address initial\n" " setting or change -- execute as: cmd ip-address port#\n" "--port port : TCP/UDP port # for both local and remote.\n" "--lport port : TCP/UDP port # for local (default=%d).\n" "--rport port : TCP/UDP port # for remote (default=%d).\n" "--nobind : Do not bind to local address and port.\n" "--dev tunX|tapX : tun/tap device (X can be omitted for dynamic device.\n" "--dev-type dt : Which device type are we using? (dt = tun or tap) Use\n" " this option only if the tun/tap device used with --dev\n" " does not begin with \"tun\" or \"tap\".\n" "--dev-node node : Explicitly set the device node rather than using\n" " /dev/net/tun, /dev/tun, /dev/tap, etc.\n" "--topology t : Set --dev tun topology: 'net30', 'p2p', or 'subnet'.\n" "--tun-ipv6 : Build tun link capable of forwarding IPv6 traffic.\n" "--ifconfig l rn : TUN: configure device to use IP address l as a local\n" " endpoint and rn as a remote endpoint. l & rn should be\n" " swapped on the other peer. l & rn must be private\n" " addresses outside of the subnets used by either peer.\n" " TAP: configure device to use IP address l as a local\n" " endpoint and rn as a subnet mask.\n" "--ifconfig-noexec : Don't actually execute ifconfig/netsh command, instead\n" " pass --ifconfig parms by environment to scripts.\n" "--ifconfig-nowarn : Don't warn if the --ifconfig option on this side of the\n" " connection doesn't match the remote side.\n" "--route network [netmask] [gateway] [metric] :\n" " Add route to routing table after connection\n" " is established. Multiple routes can be specified.\n" " netmask default: 255.255.255.255\n" " gateway default: taken from --route-gateway or --ifconfig\n" " Specify default by leaving blank or setting to \"nil\".\n" "--route-gateway gw : Specify a default gateway for use with --route.\n" "--route-delay n [w] : Delay n seconds after connection initiation before\n" " adding routes (may be 0). If not specified, routes will\n" " be added immediately after tun/tap open. On Windows, wait\n" " up to w seconds for TUN/TAP adapter to come up.\n" "--route-up cmd : Execute shell cmd after routes are added.\n" "--route-noexec : Don't add routes automatically. Instead pass routes to\n" " --route-up script using environmental variables.\n" "--redirect-gateway [flags]: (Experimental) Automatically execute routing\n" " commands to redirect all outgoing IP traffic through the\n" " VPN. Add 'local' flag if both " PACKAGE_NAME " servers are directly\n" " connected via a common subnet, such as with WiFi.\n" " Add 'def1' flag to set default route using using 0.0.0.0/1\n" " and 128.0.0.0/1 rather than 0.0.0.0/0. Add 'bypass-dhcp'\n" " flag to add a direct route to DHCP server, bypassing tunnel.\n" " Add 'bypass-dns' flag to similarly bypass tunnel for DNS.\n" "--setenv name value : Set a custom environmental variable to pass to script.\n" "--shaper n : Restrict output to peer to n bytes per second.\n" "--keepalive n m : Helper option for setting timeouts in server mode. Send\n" " ping once every n seconds, restart if ping not received\n" " for m seconds.\n" "--inactive n : Exit after n seconds of inactivity on tun/tap device.\n" "--ping-exit n : Exit if n seconds pass without reception of remote ping.\n" "--ping-restart n: Restart if n seconds pass without reception of remote ping.\n" "--ping-timer-rem: Run the --ping-exit/--ping-restart timer only if we have a\n" " remote address.\n" "--ping n : Ping remote once every n seconds over TCP/UDP port.\n" "--fast-io : (experimental) Optimize TUN/TAP/UDP writes.\n" "--remap-usr1 s : On SIGUSR1 signals, remap signal (s='SIGHUP' or 'SIGTERM').\n" "--persist-tun : Keep tun/tap device open across SIGUSR1 or --ping-restart.\n" "--persist-remote-ip : Keep remote IP address across SIGUSR1 or --ping-restart.\n" "--persist-local-ip : Keep local IP address across SIGUSR1 or --ping-restart.\n" "--persist-key : Don't re-read key files across SIGUSR1 or --ping-restart.\n" #if PASSTOS_CAPABILITY "--passtos : TOS passthrough (applies to IPv4 only).\n" #endif "--tun-mtu n : Take the tun/tap device MTU to be n and derive the\n" " TCP/UDP MTU from it (default=%d).\n" "--tun-mtu-extra n : Assume that tun/tap device might return as many\n" " as n bytes more than the tun-mtu size on read\n" " (default TUN=0 TAP=%d).\n" "--link-mtu n : Take the TCP/UDP device MTU to be n and derive the tun MTU\n" " from it.\n" "--mtu-disc type : Should we do Path MTU discovery on TCP/UDP channel?\n" " 'no' -- Never send DF (Don't Fragment) frames\n" " 'maybe' -- Use per-route hints\n" " 'yes' -- Always DF (Don't Fragment)\n" #ifdef ENABLE_OCC "--mtu-test : Empirically measure and report MTU.\n" #endif #ifdef ENABLE_FRAGMENT "--fragment max : Enable internal datagram fragmentation so that no UDP\n" " datagrams are sent which are larger than max bytes.\n" " Adds 4 bytes of overhead per datagram.\n" #endif "--mssfix [n] : Set upper bound on TCP MSS, default = tun-mtu size\n" " or --fragment max value, whichever is lower.\n" "--sndbuf size : Set the TCP/UDP send buffer size.\n" "--rcvbuf size : Set the TCP/UDP receive buffer size.\n" "--txqueuelen n : Set the tun/tap TX queue length to n (Linux only).\n" "--mlock : Disable Paging -- ensures key material and tunnel\n" " data will never be written to disk.\n" "--up cmd : Shell cmd to execute after successful tun device open.\n" " Execute as: cmd tun/tap-dev tun-mtu link-mtu \\\n" " ifconfig-local-ip ifconfig-remote-ip\n" " (pre --user or --group UID/GID change)\n" "--up-delay : Delay tun/tap open and possible --up script execution\n" " until after TCP/UDP connection establishment with peer.\n" "--down cmd : Shell cmd to run after tun device close.\n" " (post --user/--group UID/GID change and/or --chroot)\n" " (script parameters are same as --up option)\n" "--down-pre : Call --down cmd/script before TUN/TAP close.\n" "--up-restart : Run up/down scripts for all restarts including those\n" " caused by --ping-restart or SIGUSR1\n" "--user user : Set UID to user after initialization.\n" "--group group : Set GID to group after initialization.\n" "--chroot dir : Chroot to this directory after initialization.\n" "--cd dir : Change to this directory before initialization.\n" "--daemon [name] : Become a daemon after initialization.\n" " The optional 'name' parameter will be passed\n" " as the program name to the system logger.\n" "--syslog [name] : Output to syslog, but do not become a daemon.\n" " See --daemon above for a description of the 'name' parm.\n" "--inetd [name] ['wait'|'nowait'] : Run as an inetd or xinetd server.\n" " See --daemon above for a description of the 'name' parm.\n" "--log file : Output log to file which is created/truncated on open.\n" "--log-append file : Append log to file, or create file if nonexistent.\n" "--suppress-timestamps : Don't log timestamps to stdout/stderr.\n" "--writepid file : Write main process ID to file.\n" "--nice n : Change process priority (>0 = lower, <0 = higher).\n" #if 0 #ifdef USE_PTHREAD "--nice-work n : Change thread priority of work thread. The work\n" " thread is used for background processing such as\n" " RSA key number crunching.\n" #endif #endif "--echo [parms ...] : Echo parameters to log output.\n" "--verb n : Set output verbosity to n (default=%d):\n" " (Level 3 is recommended if you want a good summary\n" " of what's happening without being swamped by output).\n" " : 0 -- no output except fatal errors\n" " : 1 -- startup info + connection initiated messages +\n" " non-fatal encryption & net errors\n" " : 2,3 -- show TLS negotiations & route info\n" " : 4 -- show parameters\n" " : 5 -- show 'RrWw' chars on console for each packet sent\n" " and received from TCP/UDP (caps) or tun/tap (lc)\n" " : 6 to 11 -- debug messages of increasing verbosity\n" "--mute n : Log at most n consecutive messages in the same category.\n" "--status file n : Write operational status to file every n seconds.\n" "--status-version [n] : Choose the status file format version number.\n" " Currently, n can be 1 or 2 (default=1).\n" #ifdef ENABLE_OCC "--disable-occ : Disable options consistency check between peers.\n" #endif #ifdef ENABLE_DEBUG "--gremlin mask : Special stress testing mode (for debugging only).\n" #endif #ifdef USE_LZO "--comp-lzo : Use fast LZO compression -- may add up to 1 byte per\n" " packet for uncompressible data.\n" "--comp-noadapt : Don't use adaptive compression when --comp-lzo\n" " is specified.\n" #endif #ifdef ENABLE_MANAGEMENT "--management ip port [pass] : Enable a TCP server on ip:port to handle\n" " management functions. pass is a password file\n" " or 'stdin' to prompt from console.\n" "--management-query-passwords : Query management channel for private key\n" " and auth-user-pass passwords.\n" "--management-hold : Start " PACKAGE_NAME " in a hibernating state, until a client\n" " of the management interface explicitly starts it.\n" "--management-log-cache n : Cache n lines of log file history for usage\n" " by the management channel.\n" #endif #ifdef ENABLE_PLUGIN "--plugin m [str]: Load plug-in module m passing str as an argument\n" " to its initialization function.\n" #endif #if P2MP #if P2MP_SERVER "\n" "Multi-Client Server options (when --mode server is used):\n" "--server network netmask : Helper option to easily configure server mode.\n" "--server-bridge IP netmask pool-start-IP pool-end-IP : Helper option to\n" " easily configure ethernet bridging server mode.\n" "--push \"option\" : Push a config file option back to the peer for remote\n" " execution. Peer must specify --pull in its config file.\n" "--push-reset : Don't inherit global push list for specific\n" " client instance.\n" "--ifconfig-pool start-IP end-IP [netmask] : Set aside a pool of subnets\n" " to be dynamically allocated to connecting clients.\n" "--ifconfig-pool-linear : Use individual addresses rather than /30 subnets\n" " in tun mode. Not compatible with Windows clients.\n" "--ifconfig-pool-persist file [seconds] : Persist/unpersist ifconfig-pool\n" " data to file, at seconds intervals (default=600).\n" " If seconds=0, file will be treated as read-only.\n" "--ifconfig-push local remote-netmask : Push an ifconfig option to remote,\n" " overrides --ifconfig-pool dynamic allocation.\n" " Only valid in a client-specific config file.\n" "--iroute network [netmask] : Route subnet to client.\n" " Sets up internal routes only.\n" " Only valid in a client-specific config file.\n" "--disable : Client is disabled.\n" " Only valid in a client-specific config file.\n" "--client-cert-not-required : Don't require client certificate, client\n" " will authenticate using username/password.\n" "--username-as-common-name : For auth-user-pass authentication, use\n" " the authenticated username as the common name,\n" " rather than the common name from the client cert.\n" "--auth-user-pass-verify cmd method: Query client for username/password and\n" " run script cmd to verify. If method='via-env', pass\n" " user/pass via environment, if method='via-file', pass\n" " user/pass via temporary file.\n" "--client-to-client : Internally route client-to-client traffic.\n" "--duplicate-cn : Allow multiple clients with the same common name to\n" " concurrently connect.\n" "--client-connect cmd : Run script cmd on client connection.\n" "--client-disconnect cmd : Run script cmd on client disconnection.\n" "--client-config-dir dir : Directory for custom client config files.\n" "--ccd-exclusive : Refuse connection unless custom client config is found.\n" "--tmp-dir dir : Temporary directory, used for --client-connect return file.\n" "--hash-size r v : Set the size of the real address hash table to r and the\n" " virtual address table to v.\n" "--bcast-buffers n : Allocate n broadcast buffers.\n" "--tcp-queue-limit n : Maximum number of queued TCP output packets.\n" "--learn-address cmd : Run script cmd to validate client virtual addresses.\n" "--connect-freq n s : Allow a maximum of n new connections per s seconds.\n" "--max-clients n : Allow a maximum of n simultaneously connected clients.\n" "--max-routes-per-client n : Allow a maximum of n internal routes per client.\n" #endif "\n" "Client options (when connecting to a multi-client server):\n" "--client : Helper option to easily configure client mode.\n" "--auth-user-pass [up] : Authenticate with server using username/password.\n" " up is a file containing username/password on 2 lines,\n" " or omit to prompt from console.\n" "--pull : Accept certain config file options from the peer as if they\n" " were part of the local config file. Must be specified\n" " when connecting to a '--mode server' remote host.\n" "--auth-retry t : How to handle auth failures. Set t to\n" " none (default), interact, or nointeract.\n" #endif #ifdef ENABLE_OCC "--explicit-exit-notify [n] : On exit/restart, send exit signal to\n" " server/remote. n = # of retries, default=1.\n" #endif #ifdef USE_CRYPTO "\n" "Data Channel Encryption Options (must be compatible between peers):\n" "(These options are meaningful for both Static Key & TLS-mode)\n" "--secret f [d] : Enable Static Key encryption mode (non-TLS).\n" " Use shared secret file f, generate with --genkey.\n" " The optional d parameter controls key directionality.\n" " If d is specified, use separate keys for each\n" " direction, set d=0 on one side of the connection,\n" " and d=1 on the other side.\n" "--auth alg : Authenticate packets with HMAC using message\n" " digest algorithm alg (default=%s).\n" " (usually adds 16 or 20 bytes per packet)\n" " Set alg=none to disable authentication.\n" "--cipher alg : Encrypt packets with cipher algorithm alg\n" " (default=%s).\n" " Set alg=none to disable encryption.\n" #ifdef HAVE_EVP_CIPHER_CTX_SET_KEY_LENGTH "--keysize n : Size of cipher key in bits (optional).\n" " If unspecified, defaults to cipher-specific default.\n" #endif "--engine [name] : Enable OpenSSL hardware crypto engine functionality.\n" "--no-replay : Disable replay protection.\n" "--mute-replay-warnings : Silence the output of replay warnings to log file.\n" "--replay-window n [t] : Use a replay protection sliding window of size n\n" " and a time window of t seconds.\n" " Default n=%d t=%d\n" "--no-iv : Disable cipher IV -- only allowed with CBC mode ciphers.\n" "--replay-persist file : Persist replay-protection state across sessions\n" " using file.\n" "--test-crypto : Run a self-test of crypto features enabled.\n" " For debugging only.\n" #ifdef USE_SSL "\n" "TLS Key Negotiation Options:\n" "(These options are meaningful only for TLS-mode)\n" "--tls-server : Enable TLS and assume server role during TLS handshake.\n" "--tls-client : Enable TLS and assume client role during TLS handshake.\n" "--key-method m : Data channel key exchange method. m should be a method\n" " number, such as 1 (default), 2, etc.\n" "--ca file : Certificate authority file in .pem format containing\n" " root certificate.\n" "--dh file : File containing Diffie Hellman parameters\n" " in .pem format (for --tls-server only).\n" " Use \"openssl dhparam -out dh1024.pem 1024\" to generate.\n" "--cert file : Local certificate in .pem format -- must be signed\n" " by a Certificate Authority in --ca file.\n" "--key file : Local private key in .pem format.\n" "--pkcs12 file : PKCS#12 file containing local private key, local certificate\n" " and optionally the root CA certificate.\n" #ifdef ENABLE_PKCS11 "--pkcs11-providers provider ... : PKCS#11 provider to load.\n" "--pkcs11-sign-mode mode ... : PKCS#11 signature method.\n" " auto : Try to determind automatically (default).\n" " recover : Use SignRecover.\n" " sign : Use Sign.\n" "--pkcs11-slot-type method : Slot locate method:\n" " id : By slot id (numeric [prov#:]slot#).\n" " name : By slot name.\n" " label : By the card label that resides in slot.\n" "--pkcs11-slot name : The slot name.\n" "--pkcs11-id-type method : Certificate and key locate method:\n" " id : By the object id (hex format).\n" " label : By the object label (string).\n" " subject : By certificate subject (String).\n" "--pkcs11-id name : The object name.\n" "--pkcs11-protected-authentication : Use PKCS#11 protected authentication path.\n" #endif #ifdef WIN32 "--cryptoapicert select-string : Load the certificate and private key from the\n" " Windows Certificate System Store.\n" #endif "--tls-cipher l : A list l of allowable TLS ciphers separated by : (optional).\n" " : Use --show-tls to see a list of supported TLS ciphers.\n" "--tls-timeout n : Packet retransmit timeout on TLS control channel\n" " if no ACK from remote within n seconds (default=%d).\n" "--reneg-bytes n : Renegotiate data chan. key after n bytes sent and recvd.\n" "--reneg-pkts n : Renegotiate data chan. key after n packets sent and recvd.\n" "--reneg-sec n : Renegotiate data chan. key after n seconds (default=%d).\n" "--hand-window n : Data channel key exchange must finalize within n seconds\n" " of handshake initiation by any peer (default=%d).\n" "--tran-window n : Transition window -- old key can live this many seconds\n" " after new key renegotiation begins (default=%d).\n" "--single-session: Allow only one session (reset state on restart).\n" "--tls-exit : Exit on TLS negotiation failure.\n" "--tls-auth f [d]: Add an additional layer of authentication on top of the TLS\n" " control channel to protect against DoS attacks.\n" " f (required) is a shared-secret passphrase file.\n" " The optional d parameter controls key directionality,\n" " see --secret option for more info.\n" "--askpass [file]: Get PEM password from controlling tty before we daemonize.\n" "--auth-nocache : Don't cache --askpass or --auth-user-pass passwords.\n" "--crl-verify crl: Check peer certificate against a CRL.\n" "--tls-verify cmd: Execute shell command cmd to verify the X509 name of a\n" " pending TLS connection that has otherwise passed all other\n" " tests of certification. cmd should return 0 to allow\n" " TLS handshake to proceed, or 1 to fail. (cmd is\n" " executed as 'cmd certificate_depth X509_NAME_oneline')\n" "--tls-remote x509name: Accept connections only from a host with X509 name\n" " x509name. The remote host must also pass all other tests\n" " of verification.\n" "--ns-cert-type t: Require that peer certificate was signed with an explicit\n" " nsCertType designation t = 'client' | 'server'.\n" #endif /* USE_SSL */ "\n" "SSL Library information:\n" "--show-ciphers : Show cipher algorithms to use with --cipher option.\n" "--show-digests : Show message digest algorithms to use with --auth option.\n" "--show-engines : Show hardware crypto accelerator engines (if available).\n" #ifdef USE_SSL "--show-tls : Show all TLS ciphers (TLS used only as a control channel).\n" #endif #ifdef WIN32 "\n" "Windows Specific:\n" "--ip-win32 method : When using --ifconfig on Windows, set TAP-Win32 adapter\n" " IP address using method = manual, netsh, ipapi, or\n" " dynamic (default = ipapi).\n" " Dynamic method allows two optional parameters:\n" " offset: DHCP server address offset (> -256 and < 256).\n" " If 0, use network address, if >0, take nth\n" " address forward from network address, if <0,\n" " take nth address backward from broadcast\n" " address.\n" " Default is 0.\n" " lease-time: Lease time in seconds.\n" " Default is one year.\n" "--route-method : Which method to use for adding routes on Windows?\n" " ipapi (default) -- Use IP helper API.\n" " exe -- Call the route.exe shell command.\n" "--dhcp-option type [parm] : Set extended TAP-Win32 properties, must\n" " be used with --ip-win32 dynamic. For options\n" " which allow multiple addresses,\n" " --dhcp-option must be repeated.\n" " DOMAIN name : Set DNS suffix\n" " DNS addr : Set domain name server address(es)\n" " NTP : Set NTP server address(es)\n" " NBDD : Set NBDD server address(es)\n" " WINS addr : Set WINS server address(es)\n" " NBT type : Set NetBIOS over TCP/IP Node type\n" " 1: B, 2: P, 4: M, 8: H\n" " NBS id : Set NetBIOS scope ID\n" " DISABLE-NBT : Disable Netbios-over-TCP/IP.\n" "--dhcp-renew : Ask Windows to renew the TAP adapter lease on startup.\n" "--dhcp-pre-release : Ask Windows to release the previous TAP adapter lease on\n" " startup.\n" "--dhcp-release : Ask Windows to release the TAP adapter lease on shutdown.\n" "--tap-sleep n : Sleep for n seconds after TAP adapter open before\n" " attempting to set adapter properties.\n" "--pause-exit : When run from a console window, pause before exiting.\n" "--service ex [0|1] : For use when " PACKAGE_NAME " is being instantiated by a\n" " service, and should not be used directly by end-users.\n" " ex is the name of an event object which, when\n" " signaled, will cause " PACKAGE_NAME " to exit. A second\n" " optional parameter controls the initial state of ex.\n" "--show-net-up : Show " PACKAGE_NAME "'s view of routing table and net adapter list\n" " after TAP adapter is up and routes have been added.\n" "Windows Standalone Options:\n" "\n" "--show-adapters : Show all TAP-Win32 adapters.\n" "--show-net : Show " PACKAGE_NAME "'s view of routing table and net adapter list.\n" "--show-valid-subnets : Show valid subnets for --dev tun emulation.\n" "--allow-nonadmin [TAP-adapter] : Allow " PACKAGE_NAME " running without admin privileges\n" " to access TAP adapter.\n" #endif "\n" "Generate a random key (only for non-TLS static key encryption mode):\n" "--genkey : Generate a random key to be used as a shared secret,\n" " for use with the --secret option.\n" "--secret file : Write key to file.\n" #endif /* USE_CRYPTO */ #ifdef TUNSETPERSIST "\n" "Tun/tap config mode (available with linux 2.4+):\n" "--mktun : Create a persistent tunnel.\n" "--rmtun : Remove a persistent tunnel.\n" "--dev tunX|tapX : tun/tap device\n" "--dev-type dt : Device type. See tunnel options above for details.\n" #endif #ifdef USE_SSL #ifdef ENABLE_PKCS11 "\n" "PKCS#11 specific:\n" "--show-pkcs11-slots provider : Show PKCS#11 provider available slots.\n" "--show-pkcs11-objects provider slot : Show PKCS#11 token objects.\n" #endif #endif ; #endif /* !ENABLE_SMALL */ /* * This is where the options defaults go. * Any option not explicitly set here * will be set to 0. */ void init_options (struct options *o) { CLEAR (*o); gc_init (&o->gc); o->mode = MODE_POINT_TO_POINT; o->topology = TOP_NET30; o->proto = PROTO_UDPv4; o->connect_retry_seconds = 5; o->local_port = o->remote_port = OPENVPN_PORT; o->verbosity = 1; o->status_file_update_freq = 60; o->status_file_version = 1; o->bind_local = true; o->tun_mtu = TUN_MTU_DEFAULT; o->link_mtu = LINK_MTU_DEFAULT; o->mtu_discover_type = -1; o->mssfix = MSSFIX_DEFAULT; o->route_delay_window = 30; o->resolve_retry_seconds = RESOLV_RETRY_INFINITE; #ifdef ENABLE_OCC o->occ = true; #endif #ifdef ENABLE_MANAGEMENT o->management_log_history_cache = 250; o->management_echo_buffer_size = 100; o->management_state_buffer_size = 100; #endif #ifdef TUNSETPERSIST o->persist_mode = 1; #endif #ifndef WIN32 o->rcvbuf = 65536; o->sndbuf = 65536; #endif #ifdef TARGET_LINUX o->tuntap_options.txqueuelen = 100; #endif #ifdef WIN32 o->tuntap_options.ip_win32_type = IPW32_SET_DHCP_MASQ; o->tuntap_options.dhcp_lease_time = 31536000; /* one year */ o->tuntap_options.dhcp_masq_offset = 0; /* use network address as internal DHCP server address */ o->route_method = ROUTE_METHOD_IPAPI; #endif #ifdef USE_PTHREAD o->n_threads = 1; #endif #if P2MP_SERVER o->real_hash_size = 256; o->virtual_hash_size = 256; o->n_bcast_buf = 256; o->tcp_queue_limit = 64; o->max_clients = 1024; o->max_routes_per_client = 256; o->ifconfig_pool_persist_refresh_freq = 600; #endif #if P2MP o->scheduled_exit_interval = 5; #endif #ifdef USE_CRYPTO o->ciphername = "BF-CBC"; o->ciphername_defined = true; o->authname = "SHA1"; o->authname_defined = true; o->replay = true; o->replay_window = DEFAULT_SEQ_BACKTRACK; o->replay_time = DEFAULT_TIME_BACKTRACK; o->use_iv = true; o->key_direction = KEY_DIRECTION_BIDIRECTIONAL; #ifdef USE_SSL o->key_method = 2; o->tls_timeout = 2; o->renegotiate_seconds = 3600; o->handshake_window = 60; o->transition_window = 3600; #ifdef ENABLE_PKCS11 o->pkcs11_protected_authentication = false; #endif #endif #endif } void uninit_options (struct options *o) { gc_free (&o->gc); } #ifdef ENABLE_DEBUG #define SHOW_PARM(name, value, format) msg(D_SHOW_PARMS, " " #name " = " format, (value)) #define SHOW_STR(var) SHOW_PARM(var, (o->var ? o->var : "[UNDEF]"), "'%s'") #define SHOW_INT(var) SHOW_PARM(var, o->var, "%d") #define SHOW_UINT(var) SHOW_PARM(var, o->var, "%u") #define SHOW_UNSIGNED(var) SHOW_PARM(var, o->var, "0x%08x") #define SHOW_BOOL(var) SHOW_PARM(var, (o->var ? "ENABLED" : "DISABLED"), "%s"); #endif void setenv_settings (struct env_set *es, const struct options *o) { setenv_str (es, "config", o->config); setenv_str (es, "proto", proto2ascii (o->proto, false)); setenv_str (es, "local", o->local); setenv_int (es, "local_port", o->local_port); setenv_int (es, "verb", o->verbosity); setenv_int (es, "daemon", o->daemon); setenv_int (es, "daemon_log_redirect", o->log); if (o->remote_list) { int i; for (i = 0; i < o->remote_list->len; ++i) { char remote_string[64]; char remote_port_string[64]; openvpn_snprintf (remote_string, sizeof (remote_string), "remote_%d", i+1); openvpn_snprintf (remote_port_string, sizeof (remote_port_string), "remote_port_%d", i+1); setenv_str (es, remote_string, o->remote_list->array[i].hostname); setenv_int (es, remote_port_string, o->remote_list->array[i].port); } } } static in_addr_t get_ip_addr (const char *ip_string, int msglevel, bool *error) { unsigned int flags = GETADDR_HOST_ORDER; bool succeeded = false; in_addr_t ret; if (msglevel & M_FATAL) flags |= GETADDR_FATAL; ret = getaddr (flags, ip_string, 0, &succeeded, NULL); if (!succeeded && error) *error = true; return ret; } static char * string_substitute (const char *src, int from, int to, struct gc_arena *gc) { char *ret = (char *) gc_malloc (strlen (src) + 1, true, gc); char *dest = ret; char c; do { c = *src++; if (c == from) c = to; *dest++ = c; } while (c); return ret; } bool is_persist_option (const struct options *o) { return o->persist_tun || o->persist_key || o->persist_local_ip || o->persist_remote_ip #ifdef USE_PTHREAD || o->n_threads >= 2 #endif ; } bool is_stateful_restart (const struct options *o) { return is_persist_option (o) || (o->remote_list && o->remote_list->len > 1); } #ifdef WIN32 #ifdef ENABLE_DEBUG static void show_dhcp_option_addrs (const char *name, const in_addr_t *array, int len) { struct gc_arena gc = gc_new (); int i; for (i = 0; i < len; ++i) { msg (D_SHOW_PARMS, " %s[%d] = %s", name, i, print_in_addr_t (array[i], 0, &gc)); } gc_free (&gc); } static void show_tuntap_options (const struct tuntap_options *o) { SHOW_BOOL (ip_win32_defined); SHOW_INT (ip_win32_type); SHOW_INT (dhcp_masq_offset); SHOW_INT (dhcp_lease_time); SHOW_INT (tap_sleep); SHOW_BOOL (dhcp_options); SHOW_BOOL (dhcp_renew); SHOW_BOOL (dhcp_pre_release); SHOW_BOOL (dhcp_release); SHOW_STR (domain); SHOW_STR (netbios_scope); SHOW_INT (netbios_node_type); SHOW_BOOL (disable_nbt); show_dhcp_option_addrs ("DNS", o->dns, o->dns_len); show_dhcp_option_addrs ("WINS", o->wins, o->wins_len); show_dhcp_option_addrs ("NTP", o->ntp, o->ntp_len); show_dhcp_option_addrs ("NBDD", o->nbdd, o->nbdd_len); } #endif static void dhcp_option_address_parse (const char *name, const char *parm, in_addr_t *array, int *len, int msglevel) { if (*len >= N_DHCP_ADDR) { msg (msglevel, "--dhcp-option %s: maximum of %d %s servers can be specified", name, N_DHCP_ADDR, name); } else { bool error = false; const in_addr_t addr = get_ip_addr (parm, msglevel, &error); if (!error) array[(*len)++] = addr; } } #endif #if P2MP #ifdef ENABLE_DEBUG static void show_p2mp_parms (const struct options *o) { struct gc_arena gc = gc_new (); #if P2MP_SERVER msg (D_SHOW_PARMS, " server_network = %s", print_in_addr_t (o->server_network, 0, &gc)); msg (D_SHOW_PARMS, " server_netmask = %s", print_in_addr_t (o->server_netmask, 0, &gc)); msg (D_SHOW_PARMS, " server_bridge_ip = %s", print_in_addr_t (o->server_bridge_ip, 0, &gc)); msg (D_SHOW_PARMS, " server_bridge_netmask = %s", print_in_addr_t (o->server_bridge_netmask, 0, &gc)); msg (D_SHOW_PARMS, " server_bridge_pool_start = %s", print_in_addr_t (o->server_bridge_pool_start, 0, &gc)); msg (D_SHOW_PARMS, " server_bridge_pool_end = %s", print_in_addr_t (o->server_bridge_pool_end, 0, &gc)); if (o->push_list) { const struct push_list *l = o->push_list; const char *printable_push_list = l->options; msg (D_SHOW_PARMS, " push_list = '%s'", printable_push_list); } SHOW_BOOL (ifconfig_pool_defined); msg (D_SHOW_PARMS, " ifconfig_pool_start = %s", print_in_addr_t (o->ifconfig_pool_start, 0, &gc)); msg (D_SHOW_PARMS, " ifconfig_pool_end = %s", print_in_addr_t (o->ifconfig_pool_end, 0, &gc)); msg (D_SHOW_PARMS, " ifconfig_pool_netmask = %s", print_in_addr_t (o->ifconfig_pool_netmask, 0, &gc)); SHOW_STR (ifconfig_pool_persist_filename); SHOW_INT (ifconfig_pool_persist_refresh_freq); SHOW_INT (n_bcast_buf); SHOW_INT (tcp_queue_limit); SHOW_INT (real_hash_size); SHOW_INT (virtual_hash_size); SHOW_STR (client_connect_script); SHOW_STR (learn_address_script); SHOW_STR (client_disconnect_script); SHOW_STR (client_config_dir); SHOW_BOOL (ccd_exclusive); SHOW_STR (tmp_dir); SHOW_BOOL (push_ifconfig_defined); msg (D_SHOW_PARMS, " push_ifconfig_local = %s", print_in_addr_t (o->push_ifconfig_local, 0, &gc)); msg (D_SHOW_PARMS, " push_ifconfig_remote_netmask = %s", print_in_addr_t (o->push_ifconfig_remote_netmask, 0, &gc)); SHOW_BOOL (enable_c2c); SHOW_BOOL (duplicate_cn); SHOW_INT (cf_max); SHOW_INT (cf_per); SHOW_INT (max_clients); SHOW_INT (max_routes_per_client); SHOW_BOOL (client_cert_not_required); SHOW_BOOL (username_as_common_name) SHOW_STR (auth_user_pass_verify_script); SHOW_BOOL (auth_user_pass_verify_script_via_file); #endif /* P2MP_SERVER */ SHOW_BOOL (client); SHOW_BOOL (pull); SHOW_STR (auth_user_pass_file); gc_free (&gc); } #endif /* ENABLE_DEBUG */ #if P2MP_SERVER static void option_iroute (struct options *o, const char *network_str, const char *netmask_str, int msglevel) { struct iroute *ir; ALLOC_OBJ_GC (ir, struct iroute, &o->gc); ir->network = getaddr (GETADDR_HOST_ORDER, network_str, 0, NULL, NULL); ir->netbits = -1; if (netmask_str) { const in_addr_t netmask = getaddr (GETADDR_HOST_ORDER, netmask_str, 0, NULL, NULL); if (!netmask_to_netbits (ir->network, netmask, &ir->netbits)) { msg (msglevel, "in --iroute %s %s : Bad network/subnet specification", network_str, netmask_str); return; } } ir->next = o->iroutes; o->iroutes = ir; } #endif /* P2MP_SERVER */ #endif /* P2MP */ #ifdef ENABLE_DEBUG static void show_remote_list (const struct remote_list *l) { if (l) { int i; for (i = 0; i < l->len; ++i) { msg (D_SHOW_PARMS, " remote_list[%d] = {'%s', %d}", i, l->array[i].hostname, l->array[i].port); } } else { msg (D_SHOW_PARMS, " remote_list = NULL"); } } #endif #if defined(ENABLE_HTTP_PROXY) && defined (ENABLE_DEBUG) static void show_http_proxy_options (const struct http_proxy_options *o) { msg (D_SHOW_PARMS, "BEGIN http_proxy"); SHOW_STR (server); SHOW_INT (port); SHOW_STR (auth_method_string); SHOW_STR (auth_file); SHOW_BOOL (retry); SHOW_INT (timeout); SHOW_STR (http_version); SHOW_STR (user_agent); msg (D_SHOW_PARMS, "END http_proxy"); } #endif void options_detach (struct options *o) { gc_detach (&o->gc); o->routes = NULL; #if P2MP_SERVER if (o->push_list) /* clone push_list */ { const struct push_list *old = o->push_list; ALLOC_OBJ_GC (o->push_list, struct push_list, &o->gc); strcpy (o->push_list->options, old->options); } #endif } void rol_check_alloc (struct options *options) { if (!options->routes) options->routes = new_route_option_list (&options->gc); } void show_settings (const struct options *o) { #ifdef ENABLE_DEBUG msg (D_SHOW_PARMS, "Current Parameter Settings:"); SHOW_STR (config); SHOW_INT (mode); #ifdef TUNSETPERSIST SHOW_BOOL (persist_config); SHOW_INT (persist_mode); #endif #ifdef USE_CRYPTO SHOW_BOOL (show_ciphers); SHOW_BOOL (show_digests); SHOW_BOOL (show_engines); SHOW_BOOL (genkey); #ifdef USE_SSL SHOW_STR (key_pass_file); SHOW_BOOL (show_tls_ciphers); #endif #endif SHOW_INT (proto); SHOW_STR (local); show_remote_list (o->remote_list); SHOW_BOOL (remote_random); SHOW_INT (local_port); SHOW_INT (remote_port); SHOW_BOOL (remote_float); SHOW_STR (ipchange); SHOW_BOOL (bind_local); SHOW_STR (dev); SHOW_STR (dev_type); SHOW_STR (dev_node); SHOW_INT (topology); SHOW_BOOL (tun_ipv6); SHOW_STR (ifconfig_local); SHOW_STR (ifconfig_remote_netmask); SHOW_BOOL (ifconfig_noexec); SHOW_BOOL (ifconfig_nowarn); #ifdef HAVE_GETTIMEOFDAY SHOW_INT (shaper); #endif SHOW_INT (tun_mtu); SHOW_BOOL (tun_mtu_defined); SHOW_INT (link_mtu); SHOW_BOOL (link_mtu_defined); SHOW_INT (tun_mtu_extra); SHOW_BOOL (tun_mtu_extra_defined); #ifdef ENABLE_FRAGMENT SHOW_INT (fragment); #endif SHOW_INT (mtu_discover_type); #ifdef ENABLE_OCC SHOW_INT (mtu_test); #endif SHOW_BOOL (mlock); SHOW_INT (keepalive_ping); SHOW_INT (keepalive_timeout); SHOW_INT (inactivity_timeout); SHOW_INT (ping_send_timeout); SHOW_INT (ping_rec_timeout); SHOW_INT (ping_rec_timeout_action); SHOW_BOOL (ping_timer_remote); SHOW_INT (remap_sigusr1); #ifdef ENABLE_OCC SHOW_INT (explicit_exit_notification); #endif SHOW_BOOL (persist_tun); SHOW_BOOL (persist_local_ip); SHOW_BOOL (persist_remote_ip); SHOW_BOOL (persist_key); SHOW_INT (mssfix); #if PASSTOS_CAPABILITY SHOW_BOOL (passtos); #endif SHOW_INT (resolve_retry_seconds); SHOW_INT (connect_retry_seconds); SHOW_STR (username); SHOW_STR (groupname); SHOW_STR (chroot_dir); SHOW_STR (cd_dir); SHOW_STR (writepid); SHOW_STR (up_script); SHOW_STR (down_script); SHOW_BOOL (down_pre); SHOW_BOOL (up_restart); SHOW_BOOL (up_delay); SHOW_BOOL (daemon); SHOW_INT (inetd); SHOW_BOOL (log); SHOW_BOOL (suppress_timestamps); SHOW_INT (nice); SHOW_INT (verbosity); SHOW_INT (mute); #ifdef ENABLE_DEBUG SHOW_INT (gremlin); #endif SHOW_STR (status_file); SHOW_INT (status_file_version); SHOW_INT (status_file_update_freq); #ifdef ENABLE_OCC SHOW_BOOL (occ); #endif SHOW_INT (rcvbuf); SHOW_INT (sndbuf); SHOW_INT (sockflags); #ifdef ENABLE_HTTP_PROXY if (o->http_proxy_options) show_http_proxy_options (o->http_proxy_options); #endif #ifdef ENABLE_SOCKS SHOW_STR (socks_proxy_server); SHOW_INT (socks_proxy_port); SHOW_BOOL (socks_proxy_retry); #endif SHOW_BOOL (fast_io); #ifdef USE_LZO SHOW_INT (lzo); #endif SHOW_STR (route_script); SHOW_STR (route_default_gateway); SHOW_BOOL (route_noexec); SHOW_INT (route_delay); SHOW_INT (route_delay_window); SHOW_BOOL (route_delay_defined); SHOW_BOOL (route_nopull); if (o->routes) print_route_options (o->routes, D_SHOW_PARMS); #ifdef ENABLE_MANAGEMENT SHOW_STR (management_addr); SHOW_INT (management_port); SHOW_STR (management_user_pass); SHOW_INT (management_log_history_cache); SHOW_INT (management_echo_buffer_size); SHOW_BOOL (management_query_passwords); SHOW_BOOL (management_hold); #endif #ifdef ENABLE_PLUGIN if (o->plugin_list) plugin_option_list_print (o->plugin_list, D_SHOW_PARMS); #endif #ifdef USE_CRYPTO SHOW_STR (shared_secret_file); SHOW_INT (key_direction); SHOW_BOOL (ciphername_defined); SHOW_STR (ciphername); SHOW_BOOL (authname_defined); SHOW_STR (authname); SHOW_INT (keysize); SHOW_BOOL (engine); SHOW_BOOL (replay); SHOW_BOOL (mute_replay_warnings); SHOW_INT (replay_window); SHOW_INT (replay_time); SHOW_STR (packet_id_file); SHOW_BOOL (use_iv); SHOW_BOOL (test_crypto); #ifdef USE_SSL SHOW_BOOL (tls_server); SHOW_BOOL (tls_client); SHOW_INT (key_method); SHOW_STR (ca_file); SHOW_STR (dh_file); SHOW_STR (cert_file); SHOW_STR (priv_key_file); SHOW_STR (pkcs12_file); #ifdef ENABLE_PKCS11 { int i; for (i=0;ipkcs11_providers[i] != NULL;i++) SHOW_PARM (pkcs11_providers, o->pkcs11_providers[i], "%s"); } { int i; for (i=0;ipkcs11_sign_mode[i] != NULL;i++) SHOW_PARM (pkcs11_sign_mode, o->pkcs11_sign_mode[i], "%s"); } SHOW_STR (pkcs11_slot_type); SHOW_STR (pkcs11_slot); SHOW_STR (pkcs11_id_type); SHOW_STR (pkcs11_id); SHOW_BOOL (pkcs11_protected_authentication); #endif #ifdef WIN32 SHOW_STR (cryptoapi_cert); #endif SHOW_STR (cipher_list); SHOW_STR (tls_verify); SHOW_STR (tls_remote); SHOW_STR (crl_file); SHOW_INT (ns_cert_type); SHOW_INT (tls_timeout); SHOW_INT (renegotiate_bytes); SHOW_INT (renegotiate_packets); SHOW_INT (renegotiate_seconds); SHOW_INT (handshake_window); SHOW_INT (transition_window); SHOW_BOOL (single_session); SHOW_BOOL (tls_exit); SHOW_STR (tls_auth_file); #endif #endif #if P2MP show_p2mp_parms (o); #endif #ifdef WIN32 SHOW_BOOL (show_net_up); SHOW_INT (route_method); show_tuntap_options (&o->tuntap_options); #endif #endif } #undef SHOW_PARM #undef SHOW_STR #undef SHOW_INT #undef SHOW_BOOL #ifdef ENABLE_HTTP_PROXY struct http_proxy_options * init_http_options_if_undefined (struct options *o) { if (!o->http_proxy_options) { ALLOC_OBJ_CLEAR_GC (o->http_proxy_options, struct http_proxy_options, &o->gc); /* http proxy defaults */ o->http_proxy_options->timeout = 5; o->http_proxy_options->http_version = "1.0"; } return o->http_proxy_options; } #endif /* * Sanity check on options. * Also set some options based on other * options. */ void options_postprocess (struct options *options, bool first_time) { struct options defaults; int dev = DEV_TYPE_UNDEF; int i; bool pull = false; init_options (&defaults); #ifdef USE_CRYPTO if (options->test_crypto) { notnull (options->shared_secret_file, "key file (--secret)"); } else #endif notnull (options->dev, "TUN/TAP device (--dev)"); /* * Get tun/tap/null device type */ dev = dev_type_enum (options->dev, options->dev_type); /* * Fill in default port number for --remote list */ if (options->remote_list) { for (i = 0; i < options->remote_list->len; ++i) { struct remote_entry *e = &options->remote_list->array[i]; if (e->port < 0) e->port = options->remote_port; } } /* * If --mssfix is supplied without a parameter, default * it to --fragment value, if --fragment is specified. */ if (options->mssfix_default) { #ifdef ENABLE_FRAGMENT if (options->fragment) options->mssfix = options->fragment; #else msg (M_USAGE, "--mssfix must specify a parameter"); #endif } /* * Sanity check on daemon/inetd modes */ if (options->daemon && options->inetd) msg (M_USAGE, "only one of --daemon or --inetd may be specified"); if (options->inetd && (options->local || options->remote_list)) msg (M_USAGE, "--local or --remote cannot be used with --inetd"); if (options->inetd && options->proto == PROTO_TCPv4_CLIENT) msg (M_USAGE, "--proto tcp-client cannot be used with --inetd"); if (options->inetd == INETD_NOWAIT && options->proto != PROTO_TCPv4_SERVER) msg (M_USAGE, "--inetd nowait can only be used with --proto tcp-server"); if (options->inetd == INETD_NOWAIT #if defined(USE_CRYPTO) && defined(USE_SSL) && !(options->tls_server || options->tls_client) #endif ) msg (M_USAGE, "--inetd nowait can only be used in TLS mode"); if (options->inetd == INETD_NOWAIT && dev != DEV_TYPE_TAP) msg (M_USAGE, "--inetd nowait only makes sense in --dev tap mode"); /* * In forking TCP server mode, you don't need to ifconfig * the tap device (the assumption is that it will be bridged). */ if (options->inetd == INETD_NOWAIT) options->ifconfig_noexec = true; /* * Sanity check on TCP mode options */ if (options->connect_retry_defined && options->proto != PROTO_TCPv4_CLIENT) msg (M_USAGE, "--connect-retry doesn't make sense unless also used with --proto tcp-client"); /* * Sanity check on MTU parameters */ if (options->tun_mtu_defined && options->link_mtu_defined) msg (M_USAGE, "only one of --tun-mtu or --link-mtu may be defined (note that --ifconfig implies --link-mtu %d)", LINK_MTU_DEFAULT); #ifdef ENABLE_OCC if (options->proto != PROTO_UDPv4 && options->mtu_test) msg (M_USAGE, "--mtu-test only makes sense with --proto udp"); #endif /* * Set MTU defaults */ { if (!options->tun_mtu_defined && !options->link_mtu_defined) { options->tun_mtu_defined = true; } if ((dev == DEV_TYPE_TAP) && !options->tun_mtu_extra_defined) { options->tun_mtu_extra_defined = true; options->tun_mtu_extra = TAP_MTU_EXTRA_DEFAULT; } } /* * Process helper-type options which map to other, more complex * sequences of options. */ helper_client_server (options); helper_keepalive (options); /* will we be pulling options from server? */ #if P2MP pull = options->pull; #endif /* * Sanity check on --local, --remote, and --ifconfig */ if (options->remote_list) { int i; struct remote_list *l = options->remote_list; for (i = 0; i < l->len; ++i) { const char *remote = l->array[i].hostname; const int remote_port = l->array[i].port; if (string_defined_equal (options->local, remote) && options->local_port == remote_port) msg (M_USAGE, "--remote and --local addresses are the same"); if (string_defined_equal (remote, options->ifconfig_local) || string_defined_equal (remote, options->ifconfig_remote_netmask)) msg (M_USAGE, "--local and --remote addresses must be distinct from --ifconfig addresses"); } } if (string_defined_equal (options->local, options->ifconfig_local) || string_defined_equal (options->local, options->ifconfig_remote_netmask)) msg (M_USAGE, "--local addresses must be distinct from --ifconfig addresses"); if (string_defined_equal (options->ifconfig_local, options->ifconfig_remote_netmask)) msg (M_USAGE, "local and remote/netmask --ifconfig addresses must be different"); if (options->local_port_defined && !options->bind_local) msg (M_USAGE, "--lport and --nobind don't make sense when used together"); if (!options->remote_list && !options->bind_local) msg (M_USAGE, "--nobind doesn't make sense unless used with --remote"); /* * Check for consistency of management options */ #ifdef ENABLE_MANAGEMENT if (!options->management_addr && (options->management_query_passwords || options->management_hold || options->management_log_history_cache != defaults.management_log_history_cache)) msg (M_USAGE, "--management is not specified, however one or more options which modify the behavior of --management were specified"); #endif /* * Windows-specific options. */ #ifdef WIN32 if (dev == DEV_TYPE_TUN && !(pull || (options->ifconfig_local && options->ifconfig_remote_netmask))) msg (M_USAGE, "On Windows, --ifconfig is required when --dev tun is used"); if ((options->tuntap_options.ip_win32_defined) && !(pull || (options->ifconfig_local && options->ifconfig_remote_netmask))) msg (M_USAGE, "On Windows, --ip-win32 doesn't make sense unless --ifconfig is also used"); if (options->tuntap_options.dhcp_options && options->tuntap_options.ip_win32_type != IPW32_SET_DHCP_MASQ) msg (M_USAGE, "--dhcp-options requires --ip-win32 dynamic"); if ((dev == DEV_TYPE_TUN || dev == DEV_TYPE_TAP) && !options->route_delay_defined) { options->route_delay_defined = true; options->route_delay = 0; } if (options->ifconfig_noexec) { options->tuntap_options.ip_win32_type = IPW32_SET_MANUAL; options->ifconfig_noexec = false; } #endif /* * Check that protocol options make sense. */ #ifdef ENABLE_FRAGMENT if (options->proto != PROTO_UDPv4 && options->fragment) msg (M_USAGE, "--fragment can only be used with --proto udp"); #endif #ifdef ENABLE_OCC if (options->proto != PROTO_UDPv4 && options->explicit_exit_notification) msg (M_USAGE, "--explicit-exit-notify can only be used with --proto udp"); #endif if (!options->remote_list && options->proto == PROTO_TCPv4_CLIENT) msg (M_USAGE, "--remote MUST be used in TCP Client mode"); #ifdef ENABLE_HTTP_PROXY if (options->http_proxy_options && options->proto != PROTO_TCPv4_CLIENT) msg (M_USAGE, "--http-proxy MUST be used in TCP Client mode (i.e. --proto tcp-client)"); #endif #if defined(ENABLE_HTTP_PROXY) && defined(ENABLE_SOCKS) if (options->http_proxy_options && options->socks_proxy_server) msg (M_USAGE, "--http-proxy can not be used together with --socks-proxy"); #endif #ifdef ENABLE_SOCKS if (options->socks_proxy_server && options->proto == PROTO_TCPv4_SERVER) msg (M_USAGE, "--socks-proxy can not be used in TCP Server mode"); #endif if (options->proto == PROTO_TCPv4_SERVER && remote_list_len (options->remote_list) > 1) msg (M_USAGE, "TCP server mode allows at most one --remote address"); #if P2MP_SERVER /* * Check consistency of --mode server options. */ if (options->mode == MODE_SERVER) { #ifdef WIN32 /* * We need to explicitly set --tap-sleep because * we do not schedule event timers in the top-level context. */ options->tuntap_options.tap_sleep = 10; if (options->route_delay_defined && options->route_delay) options->tuntap_options.tap_sleep = options->route_delay; options->route_delay_defined = false; #endif if (!(dev == DEV_TYPE_TUN || dev == DEV_TYPE_TAP)) msg (M_USAGE, "--mode server only works with --dev tun or --dev tap"); if (options->pull) msg (M_USAGE, "--pull cannot be used with --mode server"); if (!(options->proto == PROTO_UDPv4 || options->proto == PROTO_TCPv4_SERVER)) msg (M_USAGE, "--mode server currently only supports --proto udp or --proto tcp-server"); if (!options->tls_server) msg (M_USAGE, "--mode server requires --tls-server"); if (options->remote_list) msg (M_USAGE, "--remote cannot be used with --mode server"); if (!options->bind_local) msg (M_USAGE, "--nobind cannot be used with --mode server"); #ifdef ENABLE_HTTP_PROXY if (options->http_proxy_options) msg (M_USAGE, "--http-proxy cannot be used with --mode server"); #endif #ifdef ENABLE_SOCKS if (options->socks_proxy_server) msg (M_USAGE, "--socks-proxy cannot be used with --mode server"); #endif if (options->tun_ipv6) msg (M_USAGE, "--tun-ipv6 cannot be used with --mode server"); if (options->shaper) msg (M_USAGE, "--shaper cannot be used with --mode server"); if (options->inetd) msg (M_USAGE, "--inetd cannot be used with --mode server"); if (options->ipchange) msg (M_USAGE, "--ipchange cannot be used with --mode server (use --client-connect instead)"); if (!(options->proto == PROTO_UDPv4 || options->proto == PROTO_TCPv4_SERVER)) msg (M_USAGE, "--mode server currently only supports --proto udp or --proto tcp-server"); if (options->proto != PROTO_UDPv4 && (options->cf_max || options->cf_per)) msg (M_USAGE, "--connect-freq only works with --mode server --proto udp. Try --max-clients instead."); if (!(dev == DEV_TYPE_TAP || (dev == DEV_TYPE_TUN && options->topology == TOP_SUBNET)) && options->ifconfig_pool_netmask) msg (M_USAGE, "The third parameter to --ifconfig-pool (netmask) is only valid in --dev tap mode"); #ifdef ENABLE_OCC if (options->explicit_exit_notification) msg (M_USAGE, "--explicit-exit-notify cannot be used with --mode server"); #endif if (options->routes && (options->routes->flags & RG_ENABLE)) msg (M_USAGE, "--redirect-gateway cannot be used with --mode server (however --push \"redirect-gateway\" is fine)"); if (options->route_delay_defined) msg (M_USAGE, "--route-delay cannot be used with --mode server"); if (options->up_delay) msg (M_USAGE, "--up-delay cannot be used with --mode server"); if (!options->ifconfig_pool_defined && options->ifconfig_pool_persist_filename) msg (M_USAGE, "--ifconfig-pool-persist must be used with --ifconfig-pool"); if (options->auth_user_pass_file) msg (M_USAGE, "--auth-user-pass cannot be used with --mode server (it should be used on the client side only)"); if (options->ccd_exclusive && !options->client_config_dir) msg (M_USAGE, "--ccd-exclusive must be used with --client-config-dir"); if (options->key_method != 2) msg (M_USAGE, "--mode server requires --key-method 2"); if (PLUGIN_OPTION_LIST (options) == NULL) { if (options->client_cert_not_required && !options->auth_user_pass_verify_script) msg (M_USAGE, "--client-cert-not-required must be used with an --auth-user-pass-verify script"); if (options->username_as_common_name && !options->auth_user_pass_verify_script) msg (M_USAGE, "--username-as-common-name must be used with an --auth-user-pass-verify script"); } } else { /* * When not in server mode, err if parameters are * specified which require --mode server. */ if (options->ifconfig_pool_defined || options->ifconfig_pool_persist_filename) msg (M_USAGE, "--ifconfig-pool/--ifconfig-pool-persist requires --mode server"); if (options->real_hash_size != defaults.real_hash_size || options->virtual_hash_size != defaults.virtual_hash_size) msg (M_USAGE, "--hash-size requires --mode server"); if (options->learn_address_script) msg (M_USAGE, "--learn-address requires --mode server"); if (options->client_connect_script) msg (M_USAGE, "--client-connect requires --mode server"); if (options->client_disconnect_script) msg (M_USAGE, "--client-disconnect requires --mode server"); if (options->tmp_dir) msg (M_USAGE, "--tmp-dir requires --mode server"); if (options->client_config_dir || options->ccd_exclusive) msg (M_USAGE, "--client-config-dir/--ccd-exclusive requires --mode server"); if (options->enable_c2c) msg (M_USAGE, "--client-to-client requires --mode server"); if (options->duplicate_cn) msg (M_USAGE, "--duplicate-cn requires --mode server"); if (options->cf_max || options->cf_per) msg (M_USAGE, "--connect-freq requires --mode server"); if (options->client_cert_not_required) msg (M_USAGE, "--client-cert-not-required requires --mode server"); if (options->username_as_common_name) msg (M_USAGE, "--username-as-common-name requires --mode server"); if (options->auth_user_pass_verify_script) msg (M_USAGE, "--auth-user-pass-verify requires --mode server"); } #endif /* P2MP_SERVER */ #ifdef USE_CRYPTO /* * Check consistency of replay options */ if ((options->proto != PROTO_UDPv4) && (options->replay_window != defaults.replay_window || options->replay_time != defaults.replay_time)) msg (M_USAGE, "--replay-window only makes sense with --proto udp"); if (!options->replay && (options->replay_window != defaults.replay_window || options->replay_time != defaults.replay_time)) msg (M_USAGE, "--replay-window doesn't make sense when replay protection is disabled with --no-replay"); /* * Don't use replay window for TCP mode (i.e. require that packets * be strictly in sequence). */ if (link_socket_proto_connection_oriented (options->proto)) options->replay_window = options->replay_time = 0; /* * SSL/TLS mode sanity checks. */ #ifdef USE_SSL if (options->tls_server + options->tls_client + (options->shared_secret_file != NULL) > 1) msg (M_USAGE, "specify only one of --tls-server, --tls-client, or --secret"); if (options->tls_server) { notnull (options->dh_file, "DH file (--dh)"); } if (options->tls_server || options->tls_client) { #ifdef ENABLE_PKCS11 if (options->pkcs11_providers[0]) { int j; notnull (options->ca_file, "CA file (--ca)"); for (j=0;jpkcs11_sign_mode[j] != NULL;j++) { if ( !string_defined_equal (options->pkcs11_sign_mode[j], "auto") && !string_defined_equal (options->pkcs11_sign_mode[j], "recover") && !string_defined_equal (options->pkcs11_sign_mode[j], "sign") ) msg(M_USAGE, "Parameter --pkcs11-sign-mode value is invalid."); } if ( !string_defined_equal (options->pkcs11_slot_type, "id") && !string_defined_equal (options->pkcs11_slot_type, "name") && !string_defined_equal (options->pkcs11_slot_type, "label") ) msg(M_USAGE, "Parameter --pkcs11-slot-type value is invalid."); notnull (options->pkcs11_slot, "PKCS#11 slot name (--pkcs11-slot)"); if ( !string_defined_equal (options->pkcs11_id_type, "id") && !string_defined_equal (options->pkcs11_id_type, "label") && !string_defined_equal (options->pkcs11_id_type, "subject") ) msg(M_USAGE, "Parameter --pkcs11-id-type value is invalid."); notnull (options->pkcs11_id, "PKCS#11 id (--pkcs11-id)"); if (options->pkcs11_protected_authentication && options->key_pass_file != NULL) msg(M_USAGE, "Parameter --askpass cannot be used when --pkcs11-protected-authentication is also specified."); if (!options->pkcs11_protected_authentication && options->key_pass_file == NULL) msg (M_USAGE, "Please specify one of --askpass or --pkcs11-protected-autentication options."); if (options->cert_file) msg(M_USAGE, "Parameter --cert cannot be used when --pkcs11-provider is also specified."); if (options->priv_key_file) msg(M_USAGE, "Parameter --key cannot be used when --pkcs11-provider is also specified."); if (options->pkcs12_file) msg(M_USAGE, "Parameter --pkcs12 cannot be used when --pkcs11-provider is also specified."); #ifdef WIN32 if (options->cryptoapi_cert) msg(M_USAGE, "Parameter --cryptoapicert cannot be used when --pkcs11-provider is also specified."); #endif } else #endif #ifdef WIN32 if (options->cryptoapi_cert) { notnull (options->ca_file, "CA file (--ca)"); if (options->cert_file) msg(M_USAGE, "Parameter --cert cannot be used when --cryptoapicert is also specified."); if (options->priv_key_file) msg(M_USAGE, "Parameter --key cannot be used when --cryptoapicert is also specified."); if (options->pkcs12_file) msg(M_USAGE, "Parameter --pkcs12 cannot be used when --cryptoapicert is also specified."); } else #endif if (options->pkcs12_file) { if (options->cert_file) msg(M_USAGE, "Parameter --cert cannot be used when --pkcs12 is also specified."); if (options->priv_key_file) msg(M_USAGE, "Parameter --key cannot be used when --pkcs12 is also specified."); } else { notnull (options->ca_file, "CA file (--ca) or PKCS#12 file (--pkcs12)"); if (pull) { const int sum = (options->cert_file != NULL) + (options->priv_key_file != NULL); if (sum == 0) { #if P2MP if (!options->auth_user_pass_file) #endif msg (M_USAGE, "No client-side authentication method is specified. You must use either --cert/--key, --pkcs12, or --auth-user-pass"); } else if (sum == 2) ; else { msg (M_USAGE, "If you use one of --cert or --key, you must use them both"); } } else { notnull (options->cert_file, "certificate file (--cert) or PKCS#12 file (--pkcs12)"); notnull (options->priv_key_file, "private key file (--key) or PKCS#12 file (--pkcs12)"); } } } else { /* * Make sure user doesn't specify any TLS options * when in non-TLS mode. */ #define MUST_BE_UNDEF(parm) if (options->parm != defaults.parm) msg (M_USAGE, err, #parm); const char err[] = "Parameter %s can only be specified in TLS-mode, i.e. where --tls-server or --tls-client is also specified."; MUST_BE_UNDEF (ca_file); MUST_BE_UNDEF (dh_file); MUST_BE_UNDEF (cert_file); MUST_BE_UNDEF (priv_key_file); MUST_BE_UNDEF (pkcs12_file); MUST_BE_UNDEF (cipher_list); MUST_BE_UNDEF (tls_verify); MUST_BE_UNDEF (tls_remote); MUST_BE_UNDEF (tls_timeout); MUST_BE_UNDEF (renegotiate_bytes); MUST_BE_UNDEF (renegotiate_packets); MUST_BE_UNDEF (renegotiate_seconds); MUST_BE_UNDEF (handshake_window); MUST_BE_UNDEF (transition_window); MUST_BE_UNDEF (tls_auth_file); MUST_BE_UNDEF (single_session); MUST_BE_UNDEF (tls_exit); MUST_BE_UNDEF (crl_file); MUST_BE_UNDEF (key_method); MUST_BE_UNDEF (ns_cert_type); #ifdef ENABLE_PKCS11 MUST_BE_UNDEF (pkcs11_providers[0]); MUST_BE_UNDEF (pkcs11_sign_mode[0]); MUST_BE_UNDEF (pkcs11_slot_type); MUST_BE_UNDEF (pkcs11_slot); MUST_BE_UNDEF (pkcs11_id_type); MUST_BE_UNDEF (pkcs11_id); #endif if (pull) msg (M_USAGE, err, "--pull"); } #undef MUST_BE_UNDEF #endif /* USE_CRYPTO */ #endif /* USE_SSL */ #if P2MP /* * In pull mode, we usually import --ping/--ping-restart parameters from * the server. However we should also set an initial default --ping-restart * for the period of time before we pull the --ping-restart parameter * from the server. */ if (options->pull && options->ping_rec_timeout_action == PING_UNDEF && options->proto == PROTO_UDPv4) { options->ping_rec_timeout = PRE_PULL_INITIAL_PING_RESTART; options->ping_rec_timeout_action = PING_RESTART; } if (options->auth_user_pass_file && !options->pull) msg (M_USAGE, "--auth-user-pass requires --pull"); /* * Save certain parms before modifying options via --pull */ pre_pull_save (options); #endif } #if P2MP /* * Save/Restore certain option defaults before --pull is applied. */ void pre_pull_save (struct options *o) { if (o->pull) { ALLOC_OBJ_CLEAR_GC (o->pre_pull, struct options_pre_pull, &o->gc); o->pre_pull->tuntap_options = o->tuntap_options; o->pre_pull->tuntap_options_defined = true; o->pre_pull->foreign_option_index = o->foreign_option_index; if (o->routes) { o->pre_pull->routes = *o->routes; o->pre_pull->routes_defined = true; } } } void pre_pull_restore (struct options *o) { const struct options_pre_pull *pp = o->pre_pull; if (pp) { CLEAR (o->tuntap_options); if (pp->tuntap_options_defined) o->tuntap_options = pp->tuntap_options; if (pp->routes_defined) { rol_check_alloc (o); *o->routes = pp->routes; } else o->routes = NULL; o->foreign_option_index = pp->foreign_option_index; } } #endif #ifdef ENABLE_OCC /* * Build an options string to represent data channel encryption options. * This string must match exactly between peers. The keysize is checked * separately by read_key(). * * The following options must match on both peers: * * Tunnel options: * * --dev tun|tap [unit number need not match] * --dev-type tun|tap * --link-mtu * --udp-mtu * --tun-mtu * --proto udp * --proto tcp-client [matched with --proto tcp-server * on the other end of the connection] * --proto tcp-server [matched with --proto tcp-client on * the other end of the connection] * --tun-ipv6 * --ifconfig x y [matched with --ifconfig y x on * the other end of the connection] * * --comp-lzo * --fragment * * Crypto Options: * * --cipher * --auth * --keysize * --secret * --no-replay * --no-iv * * SSL Options: * * --tls-auth * --tls-client [matched with --tls-server on * the other end of the connection] * --tls-server [matched with --tls-client on * the other end of the connection] */ char * options_string (const struct options *o, const struct frame *frame, struct tuntap *tt, bool remote, struct gc_arena *gc) { struct buffer out = alloc_buf (OPTION_LINE_SIZE); bool tt_local = false; buf_printf (&out, "V4"); /* * Tunnel Options */ buf_printf (&out, ",dev-type %s", dev_type_string (o->dev, o->dev_type)); buf_printf (&out, ",link-mtu %d", EXPANDED_SIZE (frame)); buf_printf (&out, ",tun-mtu %d", PAYLOAD_SIZE (frame)); buf_printf (&out, ",proto %s", proto2ascii (proto_remote (o->proto, remote), true)); if (o->tun_ipv6) buf_printf (&out, ",tun-ipv6"); /* * Try to get ifconfig parameters into the options string. * If tt is undefined, make a temporary instantiation. */ if (!tt) { tt = init_tun (o->dev, o->dev_type, o->topology, o->ifconfig_local, o->ifconfig_remote_netmask, (in_addr_t)0, (in_addr_t)0, false, NULL); if (tt) tt_local = true; } if (tt && o->mode == MODE_POINT_TO_POINT && !PULL_DEFINED(o)) { const char *ios = ifconfig_options_string (tt, remote, o->ifconfig_nowarn, gc); if (ios && strlen (ios)) buf_printf (&out, ",ifconfig %s", ios); } if (tt_local) { free (tt); tt = NULL; } #ifdef USE_LZO if (o->lzo & LZO_SELECTED) buf_printf (&out, ",comp-lzo"); #endif #ifdef ENABLE_FRAGMENT if (o->fragment) buf_printf (&out, ",mtu-dynamic"); #endif #ifdef USE_CRYPTO #ifdef USE_SSL #define TLS_CLIENT (o->tls_client) #define TLS_SERVER (o->tls_server) #else #define TLS_CLIENT (false) #define TLS_SERVER (false) #endif /* * Key direction */ { const char *kd = keydirection2ascii (o->key_direction, remote); if (kd) buf_printf (&out, ",keydir %s", kd); } /* * Crypto Options */ if (o->shared_secret_file || TLS_CLIENT || TLS_SERVER) { struct key_type kt; ASSERT ((o->shared_secret_file != NULL) + (TLS_CLIENT == true) + (TLS_SERVER == true) <= 1); init_key_type (&kt, o->ciphername, o->ciphername_defined, o->authname, o->authname_defined, o->keysize, true, false); buf_printf (&out, ",cipher %s", kt_cipher_name (&kt)); buf_printf (&out, ",auth %s", kt_digest_name (&kt)); buf_printf (&out, ",keysize %d", kt_key_size (&kt)); if (o->shared_secret_file) buf_printf (&out, ",secret"); if (!o->replay) buf_printf (&out, ",no-replay"); if (!o->use_iv) buf_printf (&out, ",no-iv"); } #ifdef USE_SSL /* * SSL Options */ { if (TLS_CLIENT || TLS_SERVER) { if (o->tls_auth_file) buf_printf (&out, ",tls-auth"); if (o->key_method > 1) buf_printf (&out, ",key-method %d", o->key_method); } if (remote) { if (TLS_CLIENT) buf_printf (&out, ",tls-server"); else if (TLS_SERVER) buf_printf (&out, ",tls-client"); } else { if (TLS_CLIENT) buf_printf (&out, ",tls-client"); else if (TLS_SERVER) buf_printf (&out, ",tls-server"); } } #endif /* USE_SSL */ #undef TLS_CLIENT #undef TLS_SERVER #endif /* USE_CRYPTO */ return BSTR (&out); } /* * Compare option strings for equality. * If the first two chars of the strings differ, it means that * we are looking at different versions of the options string, * therefore don't compare them and return true. */ bool options_cmp_equal (char *actual, const char *expected) { return options_cmp_equal_safe (actual, expected, strlen (actual) + 1); } void options_warning (char *actual, const char *expected) { options_warning_safe (actual, expected, strlen (actual) + 1); } static const char * options_warning_extract_parm1 (const char *option_string, struct gc_arena *gc_ret) { struct gc_arena gc = gc_new (); struct buffer b = string_alloc_buf (option_string, &gc); char *p = gc_malloc (OPTION_PARM_SIZE, false, &gc); const char *ret; buf_parse (&b, ' ', p, OPTION_PARM_SIZE); ret = string_alloc (p, gc_ret); gc_free (&gc); return ret; } static void options_warning_safe_scan2 (const int msglevel, const int delim, const bool report_inconsistent, const char *p1, const struct buffer *b2_src, const char *b1_name, const char *b2_name) { if (strlen (p1) > 0) { struct gc_arena gc = gc_new (); struct buffer b2 = *b2_src; const char *p1_prefix = options_warning_extract_parm1 (p1, &gc); char *p2 = gc_malloc (OPTION_PARM_SIZE, false, &gc); while (buf_parse (&b2, delim, p2, OPTION_PARM_SIZE)) { if (strlen (p2)) { const char *p2_prefix = options_warning_extract_parm1 (p2, &gc); if (!strcmp (p1, p2)) goto done; if (!strcmp (p1_prefix, p2_prefix)) { if (report_inconsistent) msg (msglevel, "WARNING: '%s' is used inconsistently, %s='%s', %s='%s'", safe_print (p1_prefix, &gc), b1_name, safe_print (p1, &gc), b2_name, safe_print (p2, &gc)); goto done; } } } msg (msglevel, "WARNING: '%s' is present in %s config but missing in %s config, %s='%s'", safe_print (p1_prefix, &gc), b1_name, b2_name, b1_name, safe_print (p1, &gc)); done: gc_free (&gc); } } static void options_warning_safe_scan1 (const int msglevel, const int delim, const bool report_inconsistent, const struct buffer *b1_src, const struct buffer *b2_src, const char *b1_name, const char *b2_name) { struct gc_arena gc = gc_new (); struct buffer b = *b1_src; char *p = gc_malloc (OPTION_PARM_SIZE, true, &gc); while (buf_parse (&b, delim, p, OPTION_PARM_SIZE)) options_warning_safe_scan2 (msglevel, delim, report_inconsistent, p, b2_src, b1_name, b2_name); gc_free (&gc); } static void options_warning_safe_ml (const int msglevel, char *actual, const char *expected, size_t actual_n) { struct gc_arena gc = gc_new (); if (actual_n > 0) { struct buffer local = alloc_buf_gc (OPTION_PARM_SIZE + 16, &gc); struct buffer remote = alloc_buf_gc (OPTION_PARM_SIZE + 16, &gc); actual[actual_n - 1] = 0; buf_printf (&local, "version %s", expected); buf_printf (&remote, "version %s", actual); options_warning_safe_scan1 (msglevel, ',', true, &local, &remote, "local", "remote"); options_warning_safe_scan1 (msglevel, ',', false, &remote, &local, "remote", "local"); } gc_free (&gc); } bool options_cmp_equal_safe (char *actual, const char *expected, size_t actual_n) { struct gc_arena gc = gc_new (); bool ret = true; if (actual_n > 0) { actual[actual_n - 1] = 0; #ifndef STRICT_OPTIONS_CHECK if (strncmp (actual, expected, 2)) { msg (D_SHOW_OCC, "NOTE: Options consistency check may be skewed by version differences"); options_warning_safe_ml (D_SHOW_OCC, actual, expected, actual_n); } else #endif ret = !strcmp (actual, expected); } gc_free (&gc); return ret; } void options_warning_safe (char *actual, const char *expected, size_t actual_n) { options_warning_safe_ml (M_WARN, actual, expected, actual_n); } const char * options_string_version (const char* s, struct gc_arena *gc) { struct buffer out = alloc_buf_gc (4, gc); strncpynt ((char *) BPTR (&out), s, 3); return BSTR (&out); } #endif /* ENABLE_OCC */ static void foreign_option (struct options *o, char *argv[], int len, struct env_set *es) { if (len > 0) { struct gc_arena gc = gc_new(); struct buffer name = alloc_buf_gc (OPTION_PARM_SIZE, &gc); struct buffer value = alloc_buf_gc (OPTION_PARM_SIZE, &gc); int i; bool first = true; buf_printf (&name, "foreign_option_%d", o->foreign_option_index + 1); ++o->foreign_option_index; for (i = 0; i < len; ++i) { if (argv[i]) { if (!first) buf_printf (&value, " "); buf_printf (&value, argv[i]); first = false; } } setenv_str (es, BSTR(&name), BSTR(&value)); gc_free (&gc); } } /* * parse/print topology coding */ int parse_topology (const char *str, const int msglevel) { if (streq (str, "net30")) return TOP_NET30; else if (streq (str, "p2p")) return TOP_P2P; else if (streq (str, "subnet")) return TOP_SUBNET; else { msg (msglevel, "--topology must be net30, p2p, or subnet"); return TOP_UNDEF; } } const char * print_topology (const int topology) { switch (topology) { case TOP_UNDEF: return "undef"; case TOP_NET30: return "net30"; case TOP_P2P: return "p2p"; case TOP_SUBNET: return "subnet"; default: return "unknown"; } } #if P2MP /* * Manage auth-retry variable */ static int global_auth_retry; /* GLOBAL */ int auth_retry_get (void) { return global_auth_retry; } bool auth_retry_set (const int msglevel, const char *option) { if (streq (option, "interact")) global_auth_retry = AR_INTERACT; else if (streq (option, "nointeract")) global_auth_retry = AR_NOINTERACT; else if (streq (option, "none")) global_auth_retry = AR_NONE; else { msg (msglevel, "--auth-retry method must be 'interact', 'nointeract', or 'none'"); return false; } return true; } const char * auth_retry_print (void) { switch (global_auth_retry) { case AR_NONE: return "none"; case AR_NOINTERACT: return "nointeract"; case AR_INTERACT: return "interact"; default: return "???"; } } #endif /* * Print the help message. */ static void usage (void) { FILE *fp = msg_fp(); #ifdef ENABLE_SMALL fprintf (fp, "Usage message not available\n"); #else struct options o; init_options (&o); #if defined(USE_CRYPTO) && defined(USE_SSL) fprintf (fp, usage_message, title_string, o.connect_retry_seconds, o.local_port, o.remote_port, TUN_MTU_DEFAULT, TAP_MTU_EXTRA_DEFAULT, o.verbosity, o.authname, o.ciphername, o.replay_window, o.replay_time, o.tls_timeout, o.renegotiate_seconds, o.handshake_window, o.transition_window); #elif defined(USE_CRYPTO) fprintf (fp, usage_message, title_string, o.connect_retry_seconds, o.local_port, o.remote_port, TUN_MTU_DEFAULT, TAP_MTU_EXTRA_DEFAULT, o.verbosity, o.authname, o.ciphername, o.replay_window, o.replay_time); #else fprintf (fp, usage_message, title_string, o.connect_retry_seconds, o.local_port, o.remote_port, TUN_MTU_DEFAULT, TAP_MTU_EXTRA_DEFAULT, o.verbosity); #endif fflush(fp); #endif /* ENABLE_SMALL */ openvpn_exit (OPENVPN_EXIT_STATUS_USAGE); /* exit point */ } void usage_small (void) { msg (M_WARN|M_NOPREFIX, "Use --help for more information."); openvpn_exit (OPENVPN_EXIT_STATUS_USAGE); /* exit point */ } static void usage_version (void) { msg (M_INFO|M_NOPREFIX, "%s", title_string); msg (M_INFO|M_NOPREFIX, "Developed by James Yonan"); msg (M_INFO|M_NOPREFIX, "Copyright (C) 2002-2005 OpenVPN Solutions LLC "); openvpn_exit (OPENVPN_EXIT_STATUS_USAGE); /* exit point */ } void notnull (const char *arg, const char *description) { if (!arg) msg (M_USAGE, "You must define %s", description); } bool string_defined_equal (const char *s1, const char *s2) { if (s1 && s2) return !strcmp (s1, s2); else return false; } #if 0 static void ping_rec_err (int msglevel) { msg (msglevel, "only one of --ping-exit or --ping-restart options may be specified"); } #endif static int positive_atoi (const char *str) { const int i = atoi (str); return i < 0 ? 0 : i; } static inline bool space (char c) { return c == '\0' || isspace (c); } int parse_line (const char *line, char *p[], const int n, const char *file, const int line_num, int msglevel, struct gc_arena *gc) { const int STATE_INITIAL = 0; const int STATE_READING_QUOTED_PARM = 1; const int STATE_READING_UNQUOTED_PARM = 2; const int STATE_DONE = 3; const char *error_prefix = ""; int ret = 0; const char *c = line; int state = STATE_INITIAL; bool backslash = false; char in, out; char parm[OPTION_PARM_SIZE]; unsigned int parm_len = 0; msglevel &= ~M_OPTERR; if (msglevel & M_MSG_VIRT_OUT) error_prefix = "ERROR: "; do { in = *c; out = 0; if (!backslash && in == '\\') { backslash = true; } else { if (state == STATE_INITIAL) { if (!space (in)) { if (in == ';' || in == '#') /* comment */ break; if (!backslash && in == '\"') state = STATE_READING_QUOTED_PARM; else { out = in; state = STATE_READING_UNQUOTED_PARM; } } } else if (state == STATE_READING_UNQUOTED_PARM) { if (!backslash && space (in)) state = STATE_DONE; else out = in; } else if (state == STATE_READING_QUOTED_PARM) { if (!backslash && in == '\"') state = STATE_DONE; else out = in; } if (state == STATE_DONE) { /* ASSERT (parm_len > 0); */ p[ret] = gc_malloc (parm_len + 1, true, gc); memcpy (p[ret], parm, parm_len); p[ret][parm_len] = '\0'; state = STATE_INITIAL; parm_len = 0; ++ret; } if (backslash && out) { if (!(out == '\\' || out == '\"' || space (out))) #ifdef ENABLE_SMALL msg (msglevel, "%sOptions warning: Bad backslash ('\\') usage in %s:%d", error_prefix, file, line_num); #else msg (msglevel, "%sOptions warning: Bad backslash ('\\') usage in %s:%d: remember that backslashes are treated as shell-escapes and if you need to pass backslash characters as part of a Windows filename, you should use double backslashes such as \"c:\\\\" PACKAGE "\\\\static.key\"", error_prefix, file, line_num); #endif } backslash = false; } /* store parameter character */ if (out) { if (parm_len >= SIZE (parm)) { parm[SIZE (parm) - 1] = 0; msg (msglevel, "%sOptions error: Parameter at %s:%d is too long (%d chars max): %s", error_prefix, file, line_num, (int) SIZE (parm), parm); return 0; } parm[parm_len++] = out; } /* avoid overflow if too many parms in one config file line */ if (ret >= n) break; } while (*c++ != '\0'); if (state == STATE_READING_QUOTED_PARM) { msg (msglevel, "%sOptions error: No closing quotation (\") in %s:%d", error_prefix, file, line_num); return 0; } if (state != STATE_INITIAL) { msg (msglevel, "%sOptions error: Residual parse state (%d) in %s:%d", error_prefix, state, file, line_num); return 0; } #if 0 { int i; for (i = 0; i < ret; ++i) { msg (M_INFO|M_NOPREFIX, "%s:%d ARG[%d] '%s'", file, line_num, i, p[i]); } } #endif return ret; } static void bypass_doubledash (char **p) { if (strlen (*p) >= 3 && !strncmp (*p, "--", 2)) *p += 2; } static int add_option (struct options *options, int i, char *p[], const char *file, int line, const int level, const int msglevel, const unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es); static void read_config_file (struct options *options, const char *file, int level, const char *top_file, const int top_line, const int msglevel, const unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { const int max_recursive_levels = 10; FILE *fp; int line_num; char line[OPTION_LINE_SIZE]; char *p[MAX_PARMS]; ++level; if (level <= max_recursive_levels) { fp = fopen (file, "r"); if (fp) { line_num = 0; while (fgets(line, sizeof (line), fp)) { CLEAR (p); ++line_num; if (parse_line (line, p, SIZE (p), file, line_num, msglevel, &options->gc)) { bypass_doubledash (&p[0]); add_option (options, 0, p, file, line_num, level, msglevel, permission_mask, option_types_found, es); } } fclose (fp); } else { msg (msglevel, "In %s:%d: Error opening configuration file: %s", top_file, top_line, file); } } else { msg (msglevel, "In %s:%d: Maximum recursive include levels exceeded in include attempt of file %s -- probably you have a configuration file that tries to include itself.", top_file, top_line, file); } } static void read_config_string (struct options *options, const char *config, const int msglevel, const unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { const char *file = "[CONFIG-STRING]"; char line[OPTION_LINE_SIZE]; struct buffer multiline; int line_num = 0; buf_set_read (&multiline, (uint8_t*)config, strlen (config)); while (buf_parse (&multiline, '\n', line, sizeof (line))) { char *p[MAX_PARMS]; CLEAR (p); ++line_num; if (parse_line (line, p, SIZE (p), file, line_num, msglevel, &options->gc)) { bypass_doubledash (&p[0]); add_option (options, 0, p, NULL, line_num, 0, msglevel, permission_mask, option_types_found, es); } } } void parse_argv (struct options *options, const int argc, char *argv[], const int msglevel, const unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { int i, j; /* usage message */ if (argc <= 1) usage (); /* config filename specified only? */ if (argc == 2 && strncmp (argv[1], "--", 2)) { char *p[MAX_PARMS]; CLEAR (p); p[0] = "config"; p[1] = argv[1]; add_option (options, 0, p, NULL, 0, 0, msglevel, permission_mask, option_types_found, es); } else { /* parse command line */ for (i = 1; i < argc; ++i) { char *p[MAX_PARMS]; CLEAR (p); p[0] = argv[i]; if (strncmp(p[0], "--", 2)) { msg (msglevel, "I'm trying to parse \"%s\" as an --option parameter but I don't see a leading '--'", p[0]); } else p[0] += 2; for (j = 1; j < MAX_PARMS; ++j) { if (i + j < argc) { char *arg = argv[i + j]; if (strncmp (arg, "--", 2)) p[j] = arg; else break; } } i = add_option (options, i, p, NULL, 0, 0, msglevel, permission_mask, option_types_found, es); } } } bool apply_push_options (struct options *options, struct buffer *buf, unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { char line[OPTION_PARM_SIZE]; int line_num = 0; const char *file = "[PUSH-OPTIONS]"; const int msglevel = D_PUSH_ERRORS|M_OPTERR; while (buf_parse (buf, ',', line, sizeof (line))) { char *p[MAX_PARMS]; CLEAR (p); ++line_num; if (parse_line (line, p, SIZE (p), file, line_num, msglevel, &options->gc)) { add_option (options, 0, p, file, line_num, 0, msglevel, permission_mask, option_types_found, es); } } return true; } void options_server_import (struct options *o, const char *filename, int msglevel, unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { msg (D_PUSH, "OPTIONS IMPORT: reading client specific options from: %s", filename); read_config_file (o, filename, 0, filename, 0, msglevel, permission_mask, option_types_found, es); } #ifdef ENABLE_PLUGIN void options_plugin_import (struct options *options, const char *config, const int msglevel, const unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { read_config_string (options, config, msglevel, permission_mask, option_types_found, es); } #endif #if P2MP #define VERIFY_PERMISSION(mask) { if (!verify_permission(p[0], (mask), permission_mask, option_types_found, msglevel)) goto err; } static bool verify_permission (const char *name, const unsigned int type, const unsigned int allowed, unsigned int *found, const int msglevel) { if (!(type & allowed)) { msg (msglevel, "option '%s' cannot be used in this context", name); return false; } else { if (found) *found |= type; return true; } } #else #define VERIFY_PERMISSION(mask) #endif /* * Return the length of a string array */ static int string_array_len (char *array[]) { int i = 0; if (array) { while (array[i]) ++i; } return i; } /* * Check that an option doesn't have too * many parameters. */ #define NM_QUOTE_HINT (1<<0) static bool no_more_than_n_args (const int msglevel, char *p[], const int max, const unsigned int flags) { const int len = string_array_len (p); if (!len) return false; if (len > max) { msg (msglevel, "the --%s directive should have at most %d parameter%s.%s", p[0], max - 1, max >= 3 ? "s" : "", (flags & NM_QUOTE_HINT) ? " To pass a list of arguments as one of the parameters, try enclosing them in double quotes (\"\")." : ""); return false; } else return true; } static int add_option (struct options *options, int i, char *p[], const char *file, int line, const int level, const int msglevel, const unsigned int permission_mask, unsigned int *option_types_found, struct env_set *es) { struct gc_arena gc = gc_new (); ASSERT (MAX_PARMS >= 5); if (!file) { file = "[CMD-LINE]"; line = 1; } if (streq (p[0], "help")) { VERIFY_PERMISSION (OPT_P_GENERAL); usage (); } if (streq (p[0], "version")) { VERIFY_PERMISSION (OPT_P_GENERAL); usage_version (); } else if (streq (p[0], "config") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_CONFIG); /* save first config file only in options */ if (!options->config) options->config = p[1]; read_config_file (options, p[1], level, file, line, msglevel, permission_mask, option_types_found, es); } else if (streq (p[0], "echo") || streq (p[0], "parameter")) { struct buffer string = alloc_buf_gc (OPTION_PARM_SIZE, &gc); int j; const bool pull_mode = BOOL_CAST (permission_mask & OPT_P_PULL_MODE); VERIFY_PERMISSION (OPT_P_ECHO); for (j = 1; j < MAX_PARMS; ++j) { if (!p[j]) break; ++i; if (j > 1) buf_printf (&string, " "); buf_printf (&string, "%s", p[j]); } msg (M_INFO, "%s:%s", pull_mode ? "ECHO-PULL" : "ECHO", BSTR (&string)); #ifdef ENABLE_MANAGEMENT if (management) management_echo (management, BSTR (&string), pull_mode); #endif } #ifdef ENABLE_MANAGEMENT else if (streq (p[0], "management") && p[1] && p[2]) { int port; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); port = atoi (p[2]); if (!legal_ipv4_port (port)) { msg (msglevel, "port number associated with --management directive is out of range"); goto err; } options->management_addr = p[1]; options->management_port = port; if (p[3]) { ++i; options->management_user_pass = p[3]; } } else if (streq (p[0], "management-query-passwords")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->management_query_passwords = true; } else if (streq (p[0], "management-hold")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->management_hold = true; } else if (streq (p[0], "management-log-cache") && p[1]) { int cache; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); cache = atoi (p[1]); if (cache < 1) { msg (msglevel, "--management-log-cache parameter is out of range"); goto err; } options->management_log_history_cache = cache; } #endif #ifdef ENABLE_PLUGIN else if (streq (p[0], "plugin") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_PLUGIN); if (p[2]) ++i; if (!no_more_than_n_args (msglevel, p, 3, NM_QUOTE_HINT)) goto err; if (!options->plugin_list) options->plugin_list = plugin_option_list_new (&options->gc); if (!plugin_option_list_add (options->plugin_list, p[1], p[2])) { msg (msglevel, "plugin add failed: %s", p[1]); goto err; } } #endif else if (streq (p[0], "mode") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (streq (p[1], "p2p")) options->mode = MODE_POINT_TO_POINT; #if P2MP_SERVER else if (streq (p[1], "server")) options->mode = MODE_SERVER; #endif else { msg (msglevel, "Bad --mode parameter: %s", p[1]); goto err; } } else if (streq (p[0], "dev") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->dev = p[1]; } else if (streq (p[0], "dev-type") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->dev_type = p[1]; } else if (streq (p[0], "dev-node") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->dev_node = p[1]; } else if (streq (p[0], "topology") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_UP); options->topology = parse_topology (p[1], msglevel); } else if (streq (p[0], "tun-ipv6")) { VERIFY_PERMISSION (OPT_P_UP); options->tun_ipv6 = true; } else if (streq (p[0], "ifconfig") && p[1] && p[2]) { i += 2; VERIFY_PERMISSION (OPT_P_UP); options->ifconfig_local = p[1]; options->ifconfig_remote_netmask = p[2]; } else if (streq (p[0], "ifconfig-noexec")) { VERIFY_PERMISSION (OPT_P_UP); options->ifconfig_noexec = true; } else if (streq (p[0], "ifconfig-nowarn")) { VERIFY_PERMISSION (OPT_P_UP); options->ifconfig_nowarn = true; } else if (streq (p[0], "local") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->local = p[1]; } else if (streq (p[0], "remote-random")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->remote_random = true; } else if (streq (p[0], "remote") && p[1]) { struct remote_list *l; struct remote_entry e; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (!options->remote_list) ALLOC_OBJ_CLEAR_GC (options->remote_list, struct remote_list, &options->gc); l = options->remote_list; if (l->len >= REMOTE_LIST_SIZE) { msg (msglevel, "Maximum number of --remote options (%d) exceeded", REMOTE_LIST_SIZE); goto err; } e.hostname = p[1]; if (p[2]) { ++i; e.port = atoi (p[2]); if (!legal_ipv4_port (e.port)) { msg (msglevel, "port number associated with host %s is out of range", e.hostname); goto err; } } else e.port = -1; l->array[l->len++] = e; } else if (streq (p[0], "resolv-retry") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (streq (p[1], "infinite")) options->resolve_retry_seconds = RESOLV_RETRY_INFINITE; else options->resolve_retry_seconds = positive_atoi (p[1]); } else if (streq (p[0], "connect-retry") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->connect_retry_seconds = positive_atoi (p[1]); options->connect_retry_defined = true; } else if (streq (p[0], "ipchange") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->ipchange = string_substitute (p[1], ',', ' ', &options->gc); } else if (streq (p[0], "float")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->remote_float = true; } #ifdef ENABLE_DEBUG else if (streq (p[0], "gremlin") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->gremlin = positive_atoi (p[1]); } #endif else if (streq (p[0], "chroot") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->chroot_dir = p[1]; } else if (streq (p[0], "cd") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (openvpn_chdir (p[1])) { msg (M_ERR, "cd to '%s' failed", p[1]); goto err; } options->cd_dir = p[1]; } else if (streq (p[0], "writepid") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->writepid = p[1]; } else if (streq (p[0], "up") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->up_script = p[1]; } else if (streq (p[0], "down") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->down_script = p[1]; } else if (streq (p[0], "down-pre")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->down_pre = true; } else if (streq (p[0], "up-delay")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->up_delay = true; } else if (streq (p[0], "up-restart")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->up_restart = true; } else if (streq (p[0], "syslog")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (p[1]) ++i; open_syslog (p[1], false); } else if (streq (p[0], "daemon")) { bool didit = false; VERIFY_PERMISSION (OPT_P_GENERAL); if (!options->daemon) { options->daemon = didit = true; open_syslog (p[1], false); } if (p[1]) { ++i; if (!didit) { msg (M_WARN, "WARNING: Multiple --daemon directives specified, ignoring --daemon %s. (Note that initscripts sometimes add their own --daemon directive.)", p[1]); goto err; } } } else if (streq (p[0], "inetd")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (!options->inetd) { int z; const char *name = NULL; const char *opterr = "when --inetd is used with two parameters, one of them must be 'wait' or 'nowait' and the other must be a daemon name to use for system logging"; options->inetd = -1; for (z = 1; z <= 2; ++z) { if (p[z]) { ++i; if (streq (p[z], "wait")) { if (options->inetd != -1) { msg (msglevel, opterr); goto err; } else options->inetd = INETD_WAIT; } else if (streq (p[z], "nowait")) { if (options->inetd != -1) { msg (msglevel, opterr); goto err; } else options->inetd = INETD_NOWAIT; } else { if (name != NULL) { msg (msglevel, opterr); goto err; } name = p[z]; } } } /* default */ if (options->inetd == -1) options->inetd = INETD_WAIT; save_inetd_socket_descriptor (); open_syslog (name, true); } } else if (streq (p[0], "log") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->log = true; redirect_stdout_stderr (p[1], false); } else if (streq (p[0], "suppress-timestamps")) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->suppress_timestamps = true; set_suppress_timestamps(true); } else if (streq (p[0], "log-append") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->log = true; redirect_stdout_stderr (p[1], true); } else if (streq (p[0], "mlock")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->mlock = true; } else if (streq (p[0], "verb") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MESSAGES); options->verbosity = positive_atoi (p[1]); } else if (streq (p[0], "mute") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MESSAGES); options->mute = positive_atoi (p[1]); } else if (streq (p[0], "status") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->status_file = p[1]; if (p[2]) { ++i; options->status_file_update_freq = positive_atoi (p[2]); } } else if (streq (p[0], "status-version") && p[1]) { int version; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); version = atoi (p[1]); if (version < 1 || version > 2) { msg (msglevel, "--status-version must be 1 or 2"); goto err; } options->status_file_version = version; } else if (streq (p[0], "remap-usr1") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (streq (p[1], "SIGHUP")) options->remap_sigusr1 = SIGHUP; else if (streq (p[1], "SIGTERM")) options->remap_sigusr1 = SIGTERM; else { msg (msglevel, "--remap-usr1 parm must be 'SIGHUP' or 'SIGTERM'"); goto err; } } else if ((streq (p[0], "link-mtu") || streq (p[0], "udp-mtu")) && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MTU); options->link_mtu = positive_atoi (p[1]); options->link_mtu_defined = true; } else if (streq (p[0], "tun-mtu") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MTU); options->tun_mtu = positive_atoi (p[1]); options->tun_mtu_defined = true; } else if (streq (p[0], "tun-mtu-extra") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MTU); options->tun_mtu_extra = positive_atoi (p[1]); options->tun_mtu_extra_defined = true; } #ifdef ENABLE_FRAGMENT else if (streq (p[0], "mtu-dynamic")) { VERIFY_PERMISSION (OPT_P_GENERAL); msg (msglevel, "--mtu-dynamic has been replaced by --fragment"); goto err; } else if (streq (p[0], "fragment") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MTU); options->fragment = positive_atoi (p[1]); } #endif else if (streq (p[0], "mtu-disc") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_MTU); options->mtu_discover_type = translate_mtu_discover_type_name (p[1]); } #ifdef ENABLE_OCC else if (streq (p[0], "mtu-test")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->mtu_test = true; } #endif else if (streq (p[0], "nice") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_NICE); options->nice = atoi (p[1]); } else if (streq (p[0], "rcvbuf") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SOCKBUF); options->rcvbuf = positive_atoi (p[1]); } else if (streq (p[0], "sndbuf") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SOCKBUF); options->sndbuf = positive_atoi (p[1]); } else if (streq (p[0], "socket-flags")) { int j; VERIFY_PERMISSION (OPT_P_SOCKFLAGS); for (j = 1; j < MAX_PARMS && p[j]; ++j) { ++i; if (streq (p[j], "TCP_NODELAY")) options->sockflags |= SF_TCP_NODELAY; else msg (msglevel, "unknown socket flag: %s", p[j]); } } else if (streq (p[0], "txqueuelen") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); #ifdef TARGET_LINUX options->tuntap_options.txqueuelen = positive_atoi (p[1]); #else msg (msglevel, "--txqueuelen not supported on this OS"); goto err; #endif } #ifdef USE_PTHREAD else if (streq (p[0], "nice-work") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_NICE); options->nice_work = atoi (p[1]); } else if (streq (p[0], "threads") && p[1]) { int n_threads; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); n_threads = positive_atoi (p[1]); if (n_threads < 1) { msg (msglevel, "--threads parameter must be at least 1"); goto err; } options->n_threads = n_threads; } #endif else if (streq (p[0], "shaper") && p[1]) { #ifdef HAVE_GETTIMEOFDAY int shaper; ++i; VERIFY_PERMISSION (OPT_P_SHAPER); shaper = atoi (p[1]); if (shaper < SHAPER_MIN || shaper > SHAPER_MAX) { msg (msglevel, "Bad shaper value, must be between %d and %d", SHAPER_MIN, SHAPER_MAX); goto err; } options->shaper = shaper; #else /* HAVE_GETTIMEOFDAY */ VERIFY_PERMISSION (OPT_P_GENERAL); msg (msglevel, "--shaper requires the gettimeofday() function which is missing"); goto err; #endif /* HAVE_GETTIMEOFDAY */ } else if (streq (p[0], "port") && p[1]) { int port; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); port = atoi (p[1]); if (!legal_ipv4_port (port)) { msg (msglevel, "Bad port number: %s", p[1]); goto err; } options->port_option_used = true; options->local_port = options->remote_port = port; } else if (streq (p[0], "lport") && p[1]) { int port; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); port = atoi (p[1]); if (!legal_ipv4_port (port)) { msg (msglevel, "Bad local port number: %s", p[1]); goto err; } options->local_port_defined = true; options->port_option_used = true; options->local_port = port; } else if (streq (p[0], "rport") && p[1]) { int port; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); port = atoi (p[1]); if (!legal_ipv4_port (port)) { msg (msglevel, "Bad remote port number: %s", p[1]); goto err; } options->port_option_used = true; options->remote_port = port; } else if (streq (p[0], "nobind")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->bind_local = false; } else if (streq (p[0], "fast-io")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->fast_io = true; } else if (streq (p[0], "inactive") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TIMER); options->inactivity_timeout = positive_atoi (p[1]); } else if (streq (p[0], "proto") && p[1]) { int proto; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); proto = ascii2proto (p[1]); if (proto < 0) { msg (msglevel, "Bad protocol: '%s'. Allowed protocols with --proto option: %s", p[1], proto2ascii_all (&gc)); goto err; } options->proto = proto; } #ifdef ENABLE_HTTP_PROXY else if (streq (p[0], "http-proxy") && p[1] && p[2]) { int port; struct http_proxy_options *ho; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); port = atoi (p[2]); if (!legal_ipv4_port (port)) { msg (msglevel, "Bad http-proxy port number: %s", p[2]); goto err; } ho = init_http_options_if_undefined (options); ho->server = p[1]; ho->port = port; if (p[3]) { ++i; ho->auth_method_string = "basic"; ho->auth_file = p[3]; if (p[4]) { ++i; ho->auth_method_string = p[4]; } } else { ho->auth_method_string = "none"; } } else if (streq (p[0], "http-proxy-retry")) { struct http_proxy_options *ho; VERIFY_PERMISSION (OPT_P_GENERAL); ho = init_http_options_if_undefined (options); ho->retry = true; } else if (streq (p[0], "http-proxy-timeout") && p[1]) { struct http_proxy_options *ho; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); ho = init_http_options_if_undefined (options); ho->timeout = positive_atoi (p[1]); } else if (streq (p[0], "http-proxy-option") && p[1]) { struct http_proxy_options *ho; ++i; if (p[2]) ++i; VERIFY_PERMISSION (OPT_P_GENERAL); ho = init_http_options_if_undefined (options); if (streq (p[1], "VERSION") && p[2]) { ho->http_version = p[2]; } else if (streq (p[1], "AGENT") && p[2]) { ho->user_agent = p[2]; } else { msg (msglevel, "Bad http-proxy-option or missing parameter: '%s'", p[1]); } } #endif #ifdef ENABLE_SOCKS else if (streq (p[0], "socks-proxy") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (p[2]) { int port; ++i; port = atoi (p[2]); if (!legal_ipv4_port (port)) { msg (msglevel, "Bad socks-proxy port number: %s", p[2]); goto err; } options->socks_proxy_port = port; } else { options->socks_proxy_port = 1080; } options->socks_proxy_server = p[1]; } else if (streq (p[0], "socks-proxy-retry")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->socks_proxy_retry = true; } #endif else if (streq (p[0], "keepalive") && p[1] && p[2]) { i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); options->keepalive_ping = atoi (p[1]); options->keepalive_timeout = atoi (p[2]); } else if (streq (p[0], "ping") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TIMER); options->ping_send_timeout = positive_atoi (p[1]); } else if (streq (p[0], "ping-exit") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TIMER); options->ping_rec_timeout = positive_atoi (p[1]); options->ping_rec_timeout_action = PING_EXIT; } else if (streq (p[0], "ping-restart") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TIMER); options->ping_rec_timeout = positive_atoi (p[1]); options->ping_rec_timeout_action = PING_RESTART; } else if (streq (p[0], "ping-timer-rem")) { VERIFY_PERMISSION (OPT_P_TIMER); options->ping_timer_remote = true; } #ifdef ENABLE_OCC else if (streq (p[0], "explicit-exit-notify")) { VERIFY_PERMISSION (OPT_P_EXPLICIT_NOTIFY); if (p[1]) { ++i; options->explicit_exit_notification = positive_atoi (p[1]); } else { options->explicit_exit_notification = 1; } } #endif else if (streq (p[0], "persist-tun")) { VERIFY_PERMISSION (OPT_P_PERSIST); options->persist_tun = true; } else if (streq (p[0], "persist-key")) { VERIFY_PERMISSION (OPT_P_PERSIST); options->persist_key = true; } else if (streq (p[0], "persist-local-ip")) { VERIFY_PERMISSION (OPT_P_PERSIST_IP); options->persist_local_ip = true; } else if (streq (p[0], "persist-remote-ip")) { VERIFY_PERMISSION (OPT_P_PERSIST_IP); options->persist_remote_ip = true; } else if (streq (p[0], "route") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_ROUTE); if (p[2]) ++i; if (p[3]) ++i; if (p[4]) ++i; rol_check_alloc (options); add_route_to_option_list (options->routes, p[1], p[2], p[3], p[4]); } else if (streq (p[0], "route-gateway") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_ROUTE_EXTRAS); options->route_default_gateway = p[1]; } else if (streq (p[0], "route-delay")) { VERIFY_PERMISSION (OPT_P_ROUTE_EXTRAS); options->route_delay_defined = true; if (p[1]) { ++i; options->route_delay = positive_atoi (p[1]); if (p[2]) { ++i; options->route_delay_window = positive_atoi (p[2]); } } else { options->route_delay = 0; } } else if (streq (p[0], "route-up") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->route_script = p[1]; } else if (streq (p[0], "route-noexec")) { VERIFY_PERMISSION (OPT_P_SCRIPT); options->route_noexec = true; } else if (streq (p[0], "route-nopull")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->route_nopull = true; } else if (streq (p[0], "redirect-gateway")) { int j; VERIFY_PERMISSION (OPT_P_ROUTE); rol_check_alloc (options); for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j) { ++i; if (streq (p[j], "local")) options->routes->flags |= RG_LOCAL; else if (streq (p[j], "def1")) options->routes->flags |= RG_DEF1; else if (streq (p[j], "bypass-dhcp")) options->routes->flags |= RG_BYPASS_DHCP; else if (streq (p[j], "bypass-dns")) options->routes->flags |= RG_BYPASS_DNS; else { msg (msglevel, "unknown --redirect-gateway flag: %s", p[j]); goto err; } } options->routes->flags |= RG_ENABLE; } else if (streq (p[0], "setenv") && p[1] && p[2]) { i += 2; VERIFY_PERMISSION (OPT_P_SETENV); setenv_str (es, p[1], p[2]); } else if (streq (p[0], "mssfix")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (p[1]) { ++i; options->mssfix = positive_atoi (p[1]); } else options->mssfix_default = true; } #ifdef ENABLE_OCC else if (streq (p[0], "disable-occ")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->occ = false; } #endif #if P2MP #if P2MP_SERVER else if (streq (p[0], "server") && p[1] && p[2]) { const int lev = M_WARN; bool error = false; in_addr_t network, netmask; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); network = get_ip_addr (p[1], lev, &error); netmask = get_ip_addr (p[2], lev, &error); if (error || !network || !netmask) { msg (msglevel, "error parsing --server parameters"); goto err; } options->server_defined = true; options->server_network = network; options->server_netmask = netmask; if (p[3]) { ++i; if (streq (p[3], "nopool")) options->server_flags |= SF_NOPOOL; else { msg (msglevel, "error parsing --server: %s is not a recognized flag", p[3]); goto err; } } } else if (streq (p[0], "server-bridge") && p[1] && p[2] && p[3] && p[4]) { const int lev = M_WARN; bool error = false; in_addr_t ip, netmask, pool_start, pool_end; i += 4; VERIFY_PERMISSION (OPT_P_GENERAL); ip = get_ip_addr (p[1], lev, &error); netmask = get_ip_addr (p[2], lev, &error); pool_start = get_ip_addr (p[3], lev, &error); pool_end = get_ip_addr (p[4], lev, &error); if (error || !ip || !netmask || !pool_start || !pool_end) { msg (msglevel, "error parsing --server-bridge parameters"); goto err; } options->server_bridge_defined = true; options->server_bridge_ip = ip; options->server_bridge_netmask = netmask; options->server_bridge_pool_start = pool_start; options->server_bridge_pool_end = pool_end; } else if (streq (p[0], "push") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_PUSH); push_option (options, p[1], msglevel); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; } else if (streq (p[0], "push-reset")) { VERIFY_PERMISSION (OPT_P_INSTANCE); push_reset (options); } else if (streq (p[0], "ifconfig-pool") && p[1] && p[2]) { const int lev = M_WARN; bool error = false; in_addr_t start, end, netmask=0; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); start = get_ip_addr (p[1], lev, &error); end = get_ip_addr (p[2], lev, &error); if (p[3]) { ++i; netmask = get_ip_addr (p[3], lev, &error); } if (error) { msg (msglevel, "error parsing --ifconfig-pool parameters"); goto err; } if (start > end) { msg (msglevel, "--ifconfig-pool start IP is greater than end IP"); goto err; } if (end - start >= IFCONFIG_POOL_MAX) { msg (msglevel, "--ifconfig-pool address range is too large. Current maximum is %d addresses.", IFCONFIG_POOL_MAX); goto err; } options->ifconfig_pool_defined = true; options->ifconfig_pool_start = start; options->ifconfig_pool_end = end; options->ifconfig_pool_netmask = netmask; } else if (streq (p[0], "ifconfig-pool-persist") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->ifconfig_pool_persist_filename = p[1]; if (p[2]) { ++i; options->ifconfig_pool_persist_refresh_freq = positive_atoi (p[2]); } } else if (streq (p[0], "ifconfig-pool-linear")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->topology = TOP_P2P; } else if (streq (p[0], "hash-size") && p[1] && p[2]) { int real, virtual; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); real = atoi (p[1]); virtual = atoi (p[2]); if (real < 1 || virtual < 1) { msg (msglevel, "--hash-size sizes must be >= 1 (preferably a power of 2)"); goto err; } options->real_hash_size = real; options->virtual_hash_size = real; } else if (streq (p[0], "connect-freq") && p[1] && p[2]) { int cf_max, cf_per; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); cf_max = atoi (p[1]); cf_per = atoi (p[2]); if (cf_max < 0 || cf_per < 0) { msg (msglevel, "--connect-freq parms must be > 0"); goto err; } options->cf_max = cf_max; options->cf_per = cf_per; } else if (streq (p[0], "max-clients") && p[1]) { int max_clients; i += 1; VERIFY_PERMISSION (OPT_P_GENERAL); max_clients = atoi (p[1]); if (max_clients < 0) { msg (msglevel, "--max-clients must be at least 1"); goto err; } options->max_clients = max_clients; } else if (streq (p[0], "max-routes-per-client") && p[1]) { i += 1; VERIFY_PERMISSION (OPT_P_INHERIT); options->max_routes_per_client = max_int (atoi (p[1]), 1); } else if (streq (p[0], "client-cert-not-required")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->client_cert_not_required = true; } else if (streq (p[0], "username-as-common-name")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->username_as_common_name = true; } else if (streq (p[0], "auth-user-pass-verify") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 3, NM_QUOTE_HINT)) goto err; if (p[2]) { ++i; if (streq (p[2], "via-env")) options->auth_user_pass_verify_script_via_file = false; else if (streq (p[2], "via-file")) options->auth_user_pass_verify_script_via_file = true; else { msg (msglevel, "second parm to --auth-user-pass-verify must be 'via-env' or 'via-file'"); goto err; } } else { msg (msglevel, "--auth-user-pass-verify requires a second parameter ('via-env' or 'via-file')"); goto err; } options->auth_user_pass_verify_script = p[1]; } else if (streq (p[0], "client-connect") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->client_connect_script = p[1]; } else if (streq (p[0], "client-disconnect") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->client_disconnect_script = p[1]; } else if (streq (p[0], "learn-address") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->learn_address_script = p[1]; } else if (streq (p[0], "tmp-dir") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->tmp_dir = p[1]; } else if (streq (p[0], "client-config-dir") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->client_config_dir = p[1]; } else if (streq (p[0], "ccd-exclusive")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->ccd_exclusive = true; } else if (streq (p[0], "bcast-buffers") && p[1]) { int n_bcast_buf; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); n_bcast_buf = atoi (p[1]); if (n_bcast_buf < 1) msg (msglevel, "--bcast-buffers parameter must be > 0"); options->n_bcast_buf = n_bcast_buf; } else if (streq (p[0], "tcp-queue-limit") && p[1]) { int tcp_queue_limit; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); tcp_queue_limit = atoi (p[1]); if (tcp_queue_limit < 1) msg (msglevel, "--tcp-queue-limit parameter must be > 0"); options->tcp_queue_limit = tcp_queue_limit; } else if (streq (p[0], "client-to-client")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->enable_c2c = true; } else if (streq (p[0], "duplicate-cn")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->duplicate_cn = true; } else if (streq (p[0], "iroute") && p[1]) { const char *netmask = NULL; ++i; VERIFY_PERMISSION (OPT_P_INSTANCE); if (p[2]) { ++i; netmask = p[2]; } option_iroute (options, p[1], netmask, msglevel); } else if (streq (p[0], "ifconfig-push") && p[1] && p[2]) { in_addr_t local, remote_netmask; i += 2; VERIFY_PERMISSION (OPT_P_INSTANCE); local = getaddr (GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[1], 0, NULL, NULL); remote_netmask = getaddr (GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[2], 0, NULL, NULL); if (local && remote_netmask) { options->push_ifconfig_defined = true; options->push_ifconfig_local = local; options->push_ifconfig_remote_netmask = remote_netmask; } else { msg (msglevel, "cannot parse --ifconfig-push addresses"); goto err; } } else if (streq (p[0], "ifconfig-push-constraint") && p[1] && p[2]) { in_addr_t network, netmask; i += 2; VERIFY_PERMISSION (OPT_P_GENERAL); network = getaddr (GETADDR_HOST_ORDER|GETADDR_RESOLVE, p[1], 0, NULL, NULL); netmask = getaddr (GETADDR_HOST_ORDER, p[2], 0, NULL, NULL); if (network && netmask) { options->push_ifconfig_constraint_defined = true; options->push_ifconfig_constraint_network = network; options->push_ifconfig_constraint_netmask = netmask; } else { msg (msglevel, "cannot parse --ifconfig-push-constraint addresses"); goto err; } } else if (streq (p[0], "disable")) { VERIFY_PERMISSION (OPT_P_INSTANCE); options->disable = true; } #endif /* P2MP_SERVER */ else if (streq (p[0], "client")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->client = true; } else if (streq (p[0], "pull")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->pull = true; } else if (streq (p[0], "auth-user-pass")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (p[1]) { ++i; options->auth_user_pass_file = p[1]; } else options->auth_user_pass_file = "stdin"; } else if (streq (p[0], "auth-retry") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); auth_retry_set (msglevel, p[1]); } #endif #ifdef WIN32 else if (streq (p[0], "route-method") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_ROUTE_EXTRAS); if (streq (p[1], "ipapi")) options->route_method = ROUTE_METHOD_IPAPI; else if (streq (p[1], "exe")) options->route_method = ROUTE_METHOD_EXE; else { msg (msglevel, "--route method must be 'ipapi' or 'exe'"); goto err; } } else if (streq (p[0], "ip-win32") && p[1]) { const int index = ascii2ipset (p[1]); struct tuntap_options *to = &options->tuntap_options; ++i; VERIFY_PERMISSION (OPT_P_IPWIN32); if (index < 0) { msg (msglevel, "Bad --ip-win32 method: '%s'. Allowed methods: %s", p[1], ipset2ascii_all (&gc)); goto err; } if (index == IPW32_SET_DHCP_MASQ) { if (p[2]) { ++i; if (!streq (p[2], "default")) { int offset = atoi (p[2]); if (!(offset > -256 && offset < 256)) { msg (msglevel, "--ip-win32 dynamic [offset] [lease-time]: offset (%d) must be > -256 and < 256", offset); goto err; } to->dhcp_masq_custom_offset = true; to->dhcp_masq_offset = offset; } if (p[3]) { const int min_lease = 30; int lease_time; ++i; lease_time = atoi (p[3]); if (lease_time < min_lease) { msg (msglevel, "--ip-win32 dynamic [offset] [lease-time]: lease time parameter (%d) must be at least %d seconds", lease_time, min_lease); goto err; } to->dhcp_lease_time = lease_time; } } } to->ip_win32_type = index; to->ip_win32_defined = true; } else if (streq (p[0], "dhcp-option") && p[1]) { struct tuntap_options *o = &options->tuntap_options; ++i; VERIFY_PERMISSION (OPT_P_IPWIN32); if (streq (p[1], "DOMAIN") && p[2]) { ++i; o->domain = p[2]; } else if (streq (p[1], "NBS") && p[2]) { ++i; o->netbios_scope = p[2]; } else if (streq (p[1], "NBT") && p[2]) { int t; ++i; t = atoi (p[2]); if (!(t == 1 || t == 2 || t == 4 || t == 8)) { msg (msglevel, "--dhcp-option NBT: parameter (%d) must be 1, 2, 4, or 8", t); goto err; } o->netbios_node_type = t; } else if (streq (p[1], "DNS") && p[2]) { ++i; dhcp_option_address_parse ("DNS", p[2], o->dns, &o->dns_len, msglevel); } else if (streq (p[1], "WINS") && p[2]) { ++i; dhcp_option_address_parse ("WINS", p[2], o->wins, &o->wins_len, msglevel); } else if (streq (p[1], "NTP") && p[2]) { ++i; dhcp_option_address_parse ("NTP", p[2], o->ntp, &o->ntp_len, msglevel); } else if (streq (p[1], "NBDD") && p[2]) { ++i; dhcp_option_address_parse ("NBDD", p[2], o->nbdd, &o->nbdd_len, msglevel); } else if (streq (p[1], "DISABLE-NBT")) { o->disable_nbt = 1; } else { msg (msglevel, "--dhcp-option: unknown option type '%s' or missing parameter", p[1]); goto err; } o->dhcp_options = true; } else if (streq (p[0], "show-adapters")) { VERIFY_PERMISSION (OPT_P_GENERAL); show_tap_win32_adapters (M_INFO|M_NOPREFIX, M_WARN|M_NOPREFIX); openvpn_exit (OPENVPN_EXIT_STATUS_GOOD); /* exit point */ } else if (streq (p[0], "show-net")) { VERIFY_PERMISSION (OPT_P_GENERAL); show_routes (M_INFO|M_NOPREFIX); show_adapters (M_INFO|M_NOPREFIX); openvpn_exit (OPENVPN_EXIT_STATUS_GOOD); /* exit point */ } else if (streq (p[0], "show-net-up")) { VERIFY_PERMISSION (OPT_P_UP); options->show_net_up = true; } else if (streq (p[0], "tap-sleep") && p[1]) { int s; ++i; VERIFY_PERMISSION (OPT_P_IPWIN32); s = atoi (p[1]); if (s < 0 || s >= 256) { msg (msglevel, "--tap-sleep parameter must be between 0 and 255"); goto err; } options->tuntap_options.tap_sleep = s; } else if (streq (p[0], "dhcp-renew")) { VERIFY_PERMISSION (OPT_P_IPWIN32); options->tuntap_options.dhcp_renew = true; } else if (streq (p[0], "dhcp-pre-release")) { VERIFY_PERMISSION (OPT_P_IPWIN32); options->tuntap_options.dhcp_pre_release = true; } else if (streq (p[0], "dhcp-release")) { VERIFY_PERMISSION (OPT_P_IPWIN32); options->tuntap_options.dhcp_release = true; } else if (streq (p[0], "show-valid-subnets")) { VERIFY_PERMISSION (OPT_P_GENERAL); show_valid_win32_tun_subnets (); openvpn_exit (OPENVPN_EXIT_STATUS_USAGE); /* exit point */ } else if (streq (p[0], "pause-exit")) { VERIFY_PERMISSION (OPT_P_GENERAL); set_pause_exit_win32 (); } else if (streq (p[0], "service") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->exit_event_name = p[1]; if (p[2]) { ++i; options->exit_event_initial_state = (atoi(p[2]) != 0); } } else if (streq (p[0], "allow-nonadmin")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (p[1]) ++i; tap_allow_nonadmin_access (p[1]); openvpn_exit (OPENVPN_EXIT_STATUS_GOOD); /* exit point */ } else if (streq (p[0], "user") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); msg (M_WARN, "NOTE: --user option is not implemented on Windows"); } else if (streq (p[0], "group") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); msg (M_WARN, "NOTE: --group option is not implemented on Windows"); } #else else if (streq (p[0], "user") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->username = p[1]; } else if (streq (p[0], "group") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->groupname = p[1]; } else if (streq (p[0], "dhcp-option") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_IPWIN32); if (p[2]) ++i; foreign_option (options, p, 3, es); } else if (streq (p[0], "route-method") && p[1]) /* ignore when pushed to non-Windows OS */ { ++i; VERIFY_PERMISSION (OPT_P_ROUTE_EXTRAS); } #endif #if PASSTOS_CAPABILITY else if (streq (p[0], "passtos")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->passtos = true; } #endif #ifdef USE_LZO else if (streq (p[0], "comp-lzo")) { VERIFY_PERMISSION (OPT_P_COMP); if (p[1]) { ++i; if (streq (p[1], "yes")) options->lzo = LZO_SELECTED|LZO_ON; else if (streq (p[1], "no")) options->lzo = LZO_SELECTED; else if (streq (p[1], "adaptive")) options->lzo = LZO_SELECTED|LZO_ON|LZO_ADAPTIVE; else { msg (msglevel, "bad comp-lzo option: %s -- must be 'yes', 'no', or 'adaptive'", p[1]); goto err; } } else options->lzo = LZO_SELECTED|LZO_ON|LZO_ADAPTIVE; } else if (streq (p[0], "comp-noadapt")) { VERIFY_PERMISSION (OPT_P_COMP); options->lzo &= ~LZO_ADAPTIVE; } #endif /* USE_LZO */ #ifdef USE_CRYPTO else if (streq (p[0], "show-ciphers")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->show_ciphers = true; } else if (streq (p[0], "show-digests")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->show_digests = true; } else if (streq (p[0], "show-engines")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->show_engines = true; } else if (streq (p[0], "secret") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (p[2]) { int key_direction; ++i; key_direction = ascii2keydirection (msglevel, p[2]); if (key_direction >= 0) options->key_direction = key_direction; else goto err; } options->shared_secret_file = p[1]; } else if (streq (p[0], "genkey")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->genkey = true; } else if (streq (p[0], "auth") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_CRYPTO); options->authname_defined = true; options->authname = p[1]; if (streq (options->authname, "none")) { options->authname_defined = false; options->authname = NULL; } } else if (streq (p[0], "auth")) { VERIFY_PERMISSION (OPT_P_CRYPTO); options->authname_defined = true; } else if (streq (p[0], "cipher") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_CRYPTO); options->ciphername_defined = true; options->ciphername = p[1]; if (streq (options->ciphername, "none")) { options->ciphername_defined = false; options->ciphername = NULL; } } else if (streq (p[0], "cipher")) { VERIFY_PERMISSION (OPT_P_CRYPTO); options->ciphername_defined = true; } else if (streq (p[0], "no-replay")) { VERIFY_PERMISSION (OPT_P_CRYPTO); options->replay = false; } else if (streq (p[0], "replay-window")) { VERIFY_PERMISSION (OPT_P_CRYPTO); if (p[1]) { int replay_window; ++i; replay_window = atoi (p[1]); if (!(MIN_SEQ_BACKTRACK <= replay_window && replay_window <= MAX_SEQ_BACKTRACK)) { msg (msglevel, "replay-window window size parameter (%d) must be between %d and %d", replay_window, MIN_SEQ_BACKTRACK, MAX_SEQ_BACKTRACK); goto err; } options->replay_window = replay_window; if (p[2]) { int replay_time; ++i; replay_time = atoi (p[2]); if (!(MIN_TIME_BACKTRACK <= replay_time && replay_time <= MAX_TIME_BACKTRACK)) { msg (msglevel, "replay-window time window parameter (%d) must be between %d and %d", replay_time, MIN_TIME_BACKTRACK, MAX_TIME_BACKTRACK); goto err; } options->replay_time = replay_time; } } else { msg (msglevel, "replay-window option is missing window size parameter"); goto err; } } else if (streq (p[0], "mute-replay-warnings")) { VERIFY_PERMISSION (OPT_P_CRYPTO); options->mute_replay_warnings = true; } else if (streq (p[0], "no-iv")) { VERIFY_PERMISSION (OPT_P_CRYPTO); options->use_iv = false; } else if (streq (p[0], "replay-persist") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->packet_id_file = p[1]; } else if (streq (p[0], "test-crypto")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->test_crypto = true; } else if (streq (p[0], "engine")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (p[1]) { ++i; options->engine = p[1]; } else options->engine = "auto"; } #ifdef HAVE_EVP_CIPHER_CTX_SET_KEY_LENGTH else if (streq (p[0], "keysize") && p[1]) { int keysize; ++i; VERIFY_PERMISSION (OPT_P_CRYPTO); keysize = atoi (p[1]) / 8; if (keysize < 0 || keysize > MAX_CIPHER_KEY_LENGTH) { msg (msglevel, "Bad keysize: %s", p[1]); goto err; } options->keysize = keysize; } #endif #ifdef USE_SSL else if (streq (p[0], "show-tls")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->show_tls_ciphers = true; } else if (streq (p[0], "tls-server")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->tls_server = true; } else if (streq (p[0], "tls-client")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->tls_client = true; } else if (streq (p[0], "ca") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->ca_file = p[1]; } else if (streq (p[0], "dh") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->dh_file = p[1]; } else if (streq (p[0], "cert") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->cert_file = p[1]; } #ifdef ENABLE_PKCS11 else if (streq (p[0], "show-pkcs11-slots") && p[1]) { char *module = p[i++]; VERIFY_PERMISSION (OPT_P_GENERAL); show_pkcs11_slots (M_INFO|M_NOPREFIX, M_WARN|M_NOPREFIX, module); openvpn_exit (OPENVPN_EXIT_STATUS_GOOD); /* exit point */ } else if (streq (p[0], "show-pkcs11-objects") && p[1] && p[2]) { char *provider = p[i++]; char *slot = p[i++]; struct gc_arena gc = gc_new (); struct buffer pass_prompt = alloc_buf_gc (128, &gc); char pin[256]; VERIFY_PERMISSION (OPT_P_GENERAL); buf_printf (&pass_prompt, "PIN:"); if (!get_console_input (BSTR (&pass_prompt), false, pin, sizeof (pin))) msg (M_FATAL, "Cannot read password from stdin"); gc_free (&gc); show_pkcs11_objects (M_INFO|M_NOPREFIX, M_WARN|M_NOPREFIX, provider, slot, pin); openvpn_exit (OPENVPN_EXIT_STATUS_GOOD); /* exit point */ } else if (streq (p[0], "pkcs11-providers") && p[1]) { int j; VERIFY_PERMISSION (OPT_P_GENERAL); for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j, ++i) options->pkcs11_providers[j-1] = p[j]; } else if (streq (p[0], "pkcs11-sign-mode") && p[1]) { int j; VERIFY_PERMISSION (OPT_P_GENERAL); for (j = 1; j < MAX_PARMS && p[j] != NULL; ++j, ++i) options->pkcs11_sign_mode[j-1] = p[j]; } else if (streq (p[0], "pkcs11-slot-type") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->pkcs11_slot_type = p[1]; } else if (streq (p[0], "pkcs11-slot") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->pkcs11_slot = p[1]; } else if (streq (p[0], "pkcs11-id-type") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->pkcs11_id_type = p[1]; } else if (streq (p[0], "pkcs11-id") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->pkcs11_id = p[1]; } else if (streq (p[0], "pkcs11-protected-authentication")) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->pkcs11_protected_authentication = true; } #endif #ifdef WIN32 else if (streq (p[0], "cryptoapicert") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->cryptoapi_cert = p[1]; } #endif else if (streq (p[0], "key") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->priv_key_file = p[1]; } else if (streq (p[0], "pkcs12") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->pkcs12_file = p[1]; } else if (streq (p[0], "askpass")) { VERIFY_PERMISSION (OPT_P_GENERAL); if (p[1]) { ++i; options->key_pass_file = p[1]; } else options->key_pass_file = "stdin"; } else if (streq (p[0], "auth-nocache")) { VERIFY_PERMISSION (OPT_P_GENERAL); ssl_set_auth_nocache (); } else if (streq (p[0], "single-session")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->single_session = true; } else if (streq (p[0], "tls-exit")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->tls_exit = true; } else if (streq (p[0], "tls-cipher") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->cipher_list = p[1]; } else if (streq (p[0], "crl-verify") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->crl_file = p[1]; } else if (streq (p[0], "tls-verify") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_SCRIPT); if (!no_more_than_n_args (msglevel, p, 2, NM_QUOTE_HINT)) goto err; options->tls_verify = string_substitute (p[1], ',', ' ', &options->gc); } else if (streq (p[0], "tls-remote") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); options->tls_remote = p[1]; } else if (streq (p[0], "ns-cert-type") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (streq (p[1], "server")) options->ns_cert_type = NS_SSL_SERVER; else if (streq (p[1], "client")) options->ns_cert_type = NS_SSL_CLIENT; else { msg (msglevel, "--ns-cert-type must be 'client' or 'server'"); goto err; } } else if (streq (p[0], "tls-timeout") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TLS_PARMS); options->tls_timeout = positive_atoi (p[1]); } else if (streq (p[0], "reneg-bytes") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TLS_PARMS); options->renegotiate_bytes = positive_atoi (p[1]); } else if (streq (p[0], "reneg-pkts") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TLS_PARMS); options->renegotiate_packets = positive_atoi (p[1]); } else if (streq (p[0], "reneg-sec") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TLS_PARMS); options->renegotiate_seconds = positive_atoi (p[1]); } else if (streq (p[0], "hand-window") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TLS_PARMS); options->handshake_window = positive_atoi (p[1]); } else if (streq (p[0], "tran-window") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_TLS_PARMS); options->transition_window = positive_atoi (p[1]); } else if (streq (p[0], "tls-auth") && p[1]) { ++i; VERIFY_PERMISSION (OPT_P_GENERAL); if (p[2]) { int key_direction; ++i; key_direction = ascii2keydirection (msglevel, p[2]); if (key_direction >= 0) options->key_direction = key_direction; else goto err; } options->tls_auth_file = p[1]; } else if (streq (p[0], "key-method") && p[1]) { int key_method; ++i; VERIFY_PERMISSION (OPT_P_GENERAL); key_method = atoi (p[1]); if (key_method < KEY_METHOD_MIN || key_method > KEY_METHOD_MAX) { msg (msglevel, "key_method parameter (%d) must be >= %d and <= %d", key_method, KEY_METHOD_MIN, KEY_METHOD_MAX); goto err; } options->key_method = key_method; } #endif /* USE_SSL */ #endif /* USE_CRYPTO */ #ifdef TUNSETPERSIST else if (streq (p[0], "rmtun")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->persist_config = true; options->persist_mode = 0; } else if (streq (p[0], "mktun")) { VERIFY_PERMISSION (OPT_P_GENERAL); options->persist_config = true; options->persist_mode = 1; } #endif else { if (file) msg (msglevel, "Unrecognized option or missing parameter(s) in %s:%d: %s (%s)", file, line, p[0], PACKAGE_VERSION); else msg (msglevel, "Unrecognized option or missing parameter(s): --%s (%s)", p[0], PACKAGE_VERSION); } err: gc_free (&gc); return i; }