1/*
2 *  OpenVPN -- An application to securely tunnel IP networks
3 *             over a single UDP port, with support for SSL/TLS-based
4 *             session authentication and key exchange,
5 *             packet encryption, packet authentication, and
6 *             packet compression.
7 *
8 *  Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
9 *
10 *  This program is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 2
12 *  as published by the Free Software Foundation.
13 *
14 *  This program is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this program (see the file COPYING included with this
21 *  distribution); if not, write to the Free Software Foundation, Inc.,
22 *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23 */
24
25/*
26 * 2004-01-28: Added Socks5 proxy support
27 *   (Christof Meerwald, http://cmeerw.org)
28 */
29
30#ifndef OPTIONS_H
31#define OPTIONS_H
32
33#include "basic.h"
34#include "common.h"
35#include "mtu.h"
36#include "route.h"
37#include "tun.h"
38#include "socket.h"
39#include "plugin.h"
40#include "manage.h"
41#include "proxy.h"
42#include "lzo.h"
43#include "pushlist.h"
44#include "clinat.h"
45
46/*
47 * Maximum number of parameters associated with an option,
48 * including the option name itself.
49 */
50#define MAX_PARMS 16
51
52/*
53 * Max size of options line and parameter.
54 */
55#define OPTION_PARM_SIZE 256
56#define OPTION_LINE_SIZE 256
57
58extern const char title_string[];
59
60#if P2MP
61
62/* certain options are saved before --pull modifications are applied */
63struct options_pre_pull
64{
65  bool tuntap_options_defined;
66  struct tuntap_options tuntap_options;
67
68  bool routes_defined;
69  struct route_option_list *routes;
70
71  bool routes_ipv6_defined;
72  struct route_ipv6_option_list *routes_ipv6;
73
74#ifdef ENABLE_CLIENT_NAT
75  bool client_nat_defined;
76  struct client_nat_option_list *client_nat;
77#endif
78
79  int foreign_option_index;
80};
81
82#endif
83#if defined(ENABLE_CRYPTO) && !defined(ENABLE_CRYPTO_OPENSSL) && !defined(ENABLE_CRYPTO_POLARSSL)
84# error "At least one of OpenSSL or PolarSSL needs to be defined."
85#endif
86
87struct connection_entry
88{
89  int proto;
90  int local_port;
91  bool local_port_defined;
92  int remote_port;
93  const char *local;
94  const char *remote;
95  bool remote_float;
96  bool bind_defined;
97  bool bind_local;
98  int connect_retry_seconds;
99  bool connect_retry_defined;
100  int connect_retry_max;
101  int connect_timeout;
102  bool connect_timeout_defined;
103#ifdef ENABLE_HTTP_PROXY
104  struct http_proxy_options *http_proxy_options;
105#endif
106#ifdef ENABLE_SOCKS
107  const char *socks_proxy_server;
108  int socks_proxy_port;
109  const char *socks_proxy_authfile;
110  bool socks_proxy_retry;
111#endif
112
113  int tun_mtu;           /* MTU of tun device */
114  bool tun_mtu_defined;  /* true if user overriding parm with command line option */
115  int tun_mtu_extra;
116  bool tun_mtu_extra_defined;
117  int link_mtu;          /* MTU of device over which tunnel packets pass via TCP/UDP */
118  bool link_mtu_defined; /* true if user overriding parm with command line option */
119
120  /* Advanced MTU negotiation and datagram fragmentation options */
121  int mtu_discover_type; /* used if OS supports setting Path MTU discovery options on socket */
122
123  int fragment;          /* internal fragmentation size */
124  int mssfix;            /* Upper bound on TCP MSS */
125  bool mssfix_default;   /* true if --mssfix was supplied without a parameter */
126
127#ifdef ENABLE_OCC
128  int explicit_exit_notification;  /* Explicitly tell peer when we are exiting via OCC_EXIT message */
129#endif
130
131# define CE_DISABLED (1<<0)
132# define CE_MAN_QUERY_PROXY (1<<1)
133# define CE_MAN_QUERY_REMOTE_UNDEF  0
134# define CE_MAN_QUERY_REMOTE_QUERY  1
135# define CE_MAN_QUERY_REMOTE_ACCEPT 2
136# define CE_MAN_QUERY_REMOTE_MOD    3
137# define CE_MAN_QUERY_REMOTE_SKIP   4
138# define CE_MAN_QUERY_REMOTE_MASK   (0x07)
139# define CE_MAN_QUERY_REMOTE_SHIFT  (2)
140  unsigned int flags;
141};
142
143struct remote_entry
144{
145  const char *remote;
146  int remote_port;
147  int proto;
148};
149
150#define CONNECTION_LIST_SIZE 64
151
152struct connection_list
153{
154  int len;
155  int current;
156  int n_cycles;
157  bool no_advance;
158  struct connection_entry *array[CONNECTION_LIST_SIZE];
159};
160
161struct remote_list
162{
163  int len;
164  struct remote_entry *array[CONNECTION_LIST_SIZE];
165};
166
167struct remote_host_store
168{
169# define RH_HOST_LEN 80
170  char host[RH_HOST_LEN];
171};
172
173/* Command line options */
174struct options
175{
176  struct gc_arena gc;
177  bool gc_owned;
178
179  /* first config file */
180  const char *config;
181
182  /* major mode */
183# define MODE_POINT_TO_POINT 0
184# define MODE_SERVER         1
185  int mode;
186
187  /* enable forward compatibility for post-2.1 features */
188  bool forward_compatible;
189
190  /* persist parms */
191  bool persist_config;
192  int persist_mode;
193
194#ifdef ENABLE_CRYPTO
195  const char *key_pass_file;
196  bool show_ciphers;
197  bool show_digests;
198  bool show_engines;
199#ifdef ENABLE_SSL
200  bool show_tls_ciphers;
201#endif
202  bool genkey;
203#endif
204
205  /* Networking parms */
206  struct connection_entry ce;
207  char *remote_ip_hint;
208  struct connection_list *connection_list;
209  struct remote_list *remote_list;
210  bool force_connection_list;
211
212#if HTTP_PROXY_OVERRIDE
213  struct http_proxy_options *http_proxy_override;
214#endif
215
216  struct remote_host_store *rh_store;
217
218  bool remote_random;
219  const char *ipchange;
220  const char *dev;
221  const char *dev_type;
222  const char *dev_node;
223  const char *lladdr;
224  int topology; /* one of the TOP_x values from proto.h */
225  const char *ifconfig_local;
226  const char *ifconfig_remote_netmask;
227  const char *ifconfig_ipv6_local;
228  int         ifconfig_ipv6_netbits;
229  const char *ifconfig_ipv6_remote;
230  bool ifconfig_noexec;
231  bool ifconfig_nowarn;
232#ifdef ENABLE_FEATURE_SHAPER
233  int shaper;
234#endif
235
236  int proto_force;
237
238#ifdef ENABLE_OCC
239  bool mtu_test;
240#endif
241
242#ifdef ENABLE_MEMSTATS
243  char *memstats_fn;
244#endif
245
246  bool mlock;
247
248  int keepalive_ping;           /* a proxy for ping/ping-restart */
249  int keepalive_timeout;
250
251  int inactivity_timeout;       /* --inactive */
252  int inactivity_minimum_bytes;
253
254  int ping_send_timeout;        /* Send a TCP/UDP ping to remote every n seconds */
255  int ping_rec_timeout;         /* Expect a TCP/UDP ping from remote at least once every n seconds */
256  bool ping_timer_remote;       /* Run ping timer only if we have a remote address */
257  bool tun_ipv6;                /* Build tun dev that supports IPv6 */
258
259# define PING_UNDEF   0
260# define PING_EXIT    1
261# define PING_RESTART 2
262  int ping_rec_timeout_action;  /* What action to take on ping_rec_timeout (exit or restart)? */
263
264  bool persist_tun;             /* Don't close/reopen TUN/TAP dev on SIGUSR1 or PING_RESTART */
265  bool persist_local_ip;        /* Don't re-resolve local address on SIGUSR1 or PING_RESTART */
266  bool persist_remote_ip;       /* Don't re-resolve remote address on SIGUSR1 or PING_RESTART */
267  bool persist_key;             /* Don't re-read key files on SIGUSR1 or PING_RESTART */
268
269#if PASSTOS_CAPABILITY
270  bool passtos;
271#endif
272
273  int resolve_retry_seconds;    /* If hostname resolve fails, retry for n seconds */
274
275  struct tuntap_options tuntap_options;
276
277  /* Misc parms */
278  const char *username;
279  const char *groupname;
280  const char *chroot_dir;
281  const char *cd_dir;
282#ifdef ENABLE_SELINUX
283  char *selinux_context;
284#endif
285  const char *writepid;
286  const char *up_script;
287  const char *down_script;
288  bool down_pre;
289  bool up_delay;
290  bool up_restart;
291  bool daemon;
292
293  int remap_sigusr1;
294
295  /* inetd modes defined in socket.h */
296  int inetd;
297
298  bool log;
299  bool suppress_timestamps;
300  int nice;
301  int verbosity;
302  int mute;
303
304#ifdef ENABLE_DEBUG
305  int gremlin;
306#endif
307
308  const char *status_file;
309  int status_file_version;
310  int status_file_update_freq;
311
312  /* optimize TUN/TAP/UDP writes */
313  bool fast_io;
314
315#ifdef ENABLE_LZO
316  /* LZO_x flags from lzo.h */
317  unsigned int lzo;
318#endif
319
320  /* buffer sizes */
321  int rcvbuf;
322  int sndbuf;
323
324  /* mark value */
325  int mark;
326
327  /* socket flags */
328  unsigned int sockflags;
329
330  /* route management */
331  const char *route_script;
332  const char *route_predown_script;
333  const char *route_default_gateway;
334  int route_default_metric;
335  bool route_noexec;
336  int route_delay;
337  int route_delay_window;
338  bool route_delay_defined;
339  int max_routes;
340  struct route_option_list *routes;
341  struct route_ipv6_option_list *routes_ipv6;			/* IPv6 */
342  bool route_nopull;
343  bool route_gateway_via_dhcp;
344  bool allow_pull_fqdn; /* as a client, allow server to push a FQDN for certain parameters */
345
346#ifdef ENABLE_CLIENT_NAT
347  struct client_nat_option_list *client_nat;
348#endif
349
350#ifdef ENABLE_OCC
351  /* Enable options consistency check between peers */
352  bool occ;
353#endif
354
355#ifdef ENABLE_MANAGEMENT
356  const char *management_addr;
357  int management_port;
358  const char *management_user_pass;
359  int management_log_history_cache;
360  int management_echo_buffer_size;
361  int management_state_buffer_size;
362  const char *management_write_peer_info_file;
363
364  const char *management_client_user;
365  const char *management_client_group;
366
367  /* Mask of MF_ values of manage.h */
368  unsigned int management_flags;
369#endif
370
371#ifdef ENABLE_PLUGIN
372  struct plugin_option_list *plugin_list;
373#endif
374
375
376
377#if P2MP
378
379#if P2MP_SERVER
380  /* the tmp dir is for now only used in the P2P server context */
381  const char *tmp_dir;
382  bool server_defined;
383  in_addr_t server_network;
384  in_addr_t server_netmask;
385  bool server_ipv6_defined;				/* IPv6 */
386  struct in6_addr server_network_ipv6;			/* IPv6 */
387  unsigned int    server_netbits_ipv6;			/* IPv6 */
388
389# define SF_NOPOOL (1<<0)
390# define SF_TCP_NODELAY_HELPER (1<<1)
391# define SF_NO_PUSH_ROUTE_GATEWAY (1<<2)
392  unsigned int server_flags;
393
394  bool server_bridge_proxy_dhcp;
395
396  bool server_bridge_defined;
397  in_addr_t server_bridge_ip;
398  in_addr_t server_bridge_netmask;
399  in_addr_t server_bridge_pool_start;
400  in_addr_t server_bridge_pool_end;
401
402  struct push_list push_list;
403  bool ifconfig_pool_defined;
404  in_addr_t ifconfig_pool_start;
405  in_addr_t ifconfig_pool_end;
406  in_addr_t ifconfig_pool_netmask;
407  const char *ifconfig_pool_persist_filename;
408  int ifconfig_pool_persist_refresh_freq;
409
410  bool   ifconfig_ipv6_pool_defined;			/* IPv6 */
411  struct in6_addr ifconfig_ipv6_pool_base;		/* IPv6 */
412  int    ifconfig_ipv6_pool_netbits;			/* IPv6 */
413
414  int real_hash_size;
415  int virtual_hash_size;
416  const char *client_connect_script;
417  const char *client_disconnect_script;
418  const char *learn_address_script;
419  const char *client_config_dir;
420  bool ccd_exclusive;
421  bool disable;
422  int n_bcast_buf;
423  int tcp_queue_limit;
424  struct iroute *iroutes;
425  struct iroute_ipv6 *iroutes_ipv6;			/* IPv6 */
426  bool push_ifconfig_defined;
427  in_addr_t push_ifconfig_local;
428  in_addr_t push_ifconfig_remote_netmask;
429#ifdef ENABLE_CLIENT_NAT
430  in_addr_t push_ifconfig_local_alias;
431#endif
432  bool push_ifconfig_constraint_defined;
433  in_addr_t push_ifconfig_constraint_network;
434  in_addr_t push_ifconfig_constraint_netmask;
435  bool            push_ifconfig_ipv6_defined;		/* IPv6 */
436  struct in6_addr push_ifconfig_ipv6_local;		/* IPv6 */
437  int 		  push_ifconfig_ipv6_netbits;		/* IPv6 */
438  struct in6_addr push_ifconfig_ipv6_remote;		/* IPv6 */
439  bool enable_c2c;
440  bool duplicate_cn;
441  int cf_max;
442  int cf_per;
443  int max_clients;
444  int max_routes_per_client;
445  int stale_routes_check_interval;
446  int stale_routes_ageing_time;
447
448  const char *auth_user_pass_verify_script;
449  bool auth_user_pass_verify_script_via_file;
450#if PORT_SHARE
451  char *port_share_host;
452  int port_share_port;
453  const char *port_share_journal_dir;
454#endif
455#endif
456
457  bool client;
458  bool pull; /* client pull of config options from server */
459  int push_continuation;
460  const char *auth_user_pass_file;
461  struct options_pre_pull *pre_pull;
462
463  int server_poll_timeout;
464
465  int scheduled_exit_interval;
466
467#ifdef ENABLE_CLIENT_CR
468  struct static_challenge_info sc_info;
469#endif
470#endif
471
472#ifdef ENABLE_CRYPTO
473  /* Cipher parms */
474  const char *shared_secret_file;
475  const char *shared_secret_file_inline;
476  int key_direction;
477  bool ciphername_defined;
478  const char *ciphername;
479  bool authname_defined;
480  const char *authname;
481  int keysize;
482  const char *prng_hash;
483  int prng_nonce_secret_len;
484  const char *engine;
485  bool replay;
486  bool mute_replay_warnings;
487  int replay_window;
488  int replay_time;
489  const char *packet_id_file;
490  bool use_iv;
491  bool test_crypto;
492#ifdef ENABLE_PREDICTION_RESISTANCE
493  bool use_prediction_resistance;
494#endif
495
496#ifdef ENABLE_SSL
497  /* TLS (control channel) parms */
498  bool tls_server;
499  bool tls_client;
500  const char *ca_file;
501  const char *ca_path;
502  const char *dh_file;
503  const char *cert_file;
504  const char *extra_certs_file;
505  const char *priv_key_file;
506  const char *pkcs12_file;
507  const char *cipher_list;
508  const char *tls_verify;
509  int verify_x509_type;
510  const char *verify_x509_name;
511  const char *tls_export_cert;
512  const char *crl_file;
513
514  const char *ca_file_inline;
515  const char *cert_file_inline;
516  const char *extra_certs_file_inline;
517  char *priv_key_file_inline;
518  const char *dh_file_inline;
519  const char *pkcs12_file_inline; /* contains the base64 encoding of pkcs12 file */
520
521  int ns_cert_type; /* set to 0, NS_CERT_CHECK_SERVER, or NS_CERT_CHECK_CLIENT */
522  unsigned remote_cert_ku[MAX_PARMS];
523  const char *remote_cert_eku;
524  uint8_t *verify_hash;
525  unsigned int ssl_flags; /* set to SSLF_x flags from ssl.h */
526
527#ifdef ENABLE_PKCS11
528  const char *pkcs11_providers[MAX_PARMS];
529  unsigned pkcs11_private_mode[MAX_PARMS];
530  bool pkcs11_protected_authentication[MAX_PARMS];
531  bool pkcs11_cert_private[MAX_PARMS];
532  int pkcs11_pin_cache_period;
533  const char *pkcs11_id;
534  bool pkcs11_id_management;
535#endif
536
537#ifdef ENABLE_CRYPTOAPI
538  const char *cryptoapi_cert;
539#endif
540
541  /* data channel key exchange method */
542  int key_method;
543
544  /* Per-packet timeout on control channel */
545  int tls_timeout;
546
547  /* Data channel key renegotiation parameters */
548  int renegotiate_bytes;
549  int renegotiate_packets;
550  int renegotiate_seconds;
551
552  /* Data channel key handshake must finalize
553     within n seconds of handshake initiation. */
554  int handshake_window;
555
556#ifdef ENABLE_X509ALTUSERNAME
557  /* Field used to be the username in X509 cert. */
558  char *x509_username_field;
559#endif
560
561  /* Old key allowed to live n seconds after new key goes active */
562  int transition_window;
563
564  /* Special authentication MAC for TLS control channel */
565  const char *tls_auth_file;		/* shared secret */
566  const char *tls_auth_file_inline;
567
568  /* Allow only one session */
569  bool single_session;
570
571#ifdef ENABLE_PUSH_PEER_INFO
572  bool push_peer_info;
573#endif
574
575  bool tls_exit;
576
577#endif /* ENABLE_SSL */
578#endif /* ENABLE_CRYPTO */
579
580#ifdef ENABLE_X509_TRACK
581  const struct x509_track *x509_track;
582#endif
583
584  /* special state parms */
585  int foreign_option_index;
586
587#ifdef WIN32
588  const char *exit_event_name;
589  bool exit_event_initial_state;
590  bool show_net_up;
591  int route_method;
592#endif
593};
594
595#define streq(x, y) (!strcmp((x), (y)))
596
597/*
598 * Option classes.
599 */
600#define OPT_P_GENERAL         (1<<0)
601#define OPT_P_UP              (1<<1)
602#define OPT_P_ROUTE           (1<<2)
603#define OPT_P_IPWIN32         (1<<3)
604#define OPT_P_SCRIPT          (1<<4)
605#define OPT_P_SETENV          (1<<5)
606#define OPT_P_SHAPER          (1<<6)
607#define OPT_P_TIMER           (1<<7)
608#define OPT_P_PERSIST         (1<<8)
609#define OPT_P_PERSIST_IP      (1<<9)
610#define OPT_P_COMP            (1<<10) /* TODO */
611#define OPT_P_MESSAGES        (1<<11)
612#define OPT_P_CRYPTO          (1<<12) /* TODO */
613#define OPT_P_TLS_PARMS       (1<<13) /* TODO */
614#define OPT_P_MTU             (1<<14) /* TODO */
615#define OPT_P_NICE            (1<<15)
616#define OPT_P_PUSH            (1<<16)
617#define OPT_P_INSTANCE        (1<<17)
618#define OPT_P_CONFIG          (1<<18)
619#define OPT_P_EXPLICIT_NOTIFY (1<<19)
620#define OPT_P_ECHO            (1<<20)
621#define OPT_P_INHERIT         (1<<21)
622#define OPT_P_ROUTE_EXTRAS    (1<<22)
623#define OPT_P_PULL_MODE       (1<<23)
624#define OPT_P_PLUGIN          (1<<24)
625#define OPT_P_SOCKBUF         (1<<25)
626#define OPT_P_SOCKFLAGS       (1<<26)
627#define OPT_P_CONNECTION      (1<<27)
628
629#define OPT_P_DEFAULT   (~(OPT_P_INSTANCE|OPT_P_PULL_MODE))
630
631#if P2MP
632#define PULL_DEFINED(opt) ((opt)->pull)
633#if P2MP_SERVER
634#define PUSH_DEFINED(opt) ((opt)->push_list)
635#endif
636#endif
637
638#ifndef PULL_DEFINED
639#define PULL_DEFINED(opt) (false)
640#endif
641
642#ifndef PUSH_DEFINED
643#define PUSH_DEFINED(opt) (false)
644#endif
645
646#ifdef WIN32
647#define ROUTE_OPTION_FLAGS(o) ((o)->route_method & ROUTE_METHOD_MASK)
648#else
649#define ROUTE_OPTION_FLAGS(o) (0)
650#endif
651
652#ifdef ENABLE_FEATURE_SHAPER
653#define SHAPER_DEFINED(opt) ((opt)->shaper)
654#else
655#define SHAPER_DEFINED(opt) (false)
656#endif
657
658#ifdef ENABLE_PLUGIN
659#define PLUGIN_OPTION_LIST(opt) ((opt)->plugin_list)
660#else
661#define PLUGIN_OPTION_LIST(opt) (NULL)
662#endif
663
664#ifdef MANAGEMENT_DEF_AUTH
665#define MAN_CLIENT_AUTH_ENABLED(opt) ((opt)->management_flags & MF_CLIENT_AUTH)
666#else
667#define MAN_CLIENT_AUTH_ENABLED(opt) (false)
668#endif
669
670void parse_argv (struct options *options,
671		 const int argc,
672		 char *argv[],
673		 const int msglevel,
674		 const unsigned int permission_mask,
675		 unsigned int *option_types_found,
676		 struct env_set *es);
677
678void notnull (const char *arg, const char *description);
679
680void usage_small (void);
681
682void init_options (struct options *o, const bool init_gc);
683void uninit_options (struct options *o);
684
685void setenv_settings (struct env_set *es, const struct options *o);
686void show_settings (const struct options *o);
687
688bool string_defined_equal (const char *s1, const char *s2);
689
690#ifdef ENABLE_OCC
691
692const char *options_string_version (const char* s, struct gc_arena *gc);
693
694char *options_string (const struct options *o,
695		      const struct frame *frame,
696		      struct tuntap *tt,
697		      bool remote,
698		      struct gc_arena *gc);
699
700bool options_cmp_equal_safe (char *actual, const char *expected, size_t actual_n);
701void options_warning_safe (char *actual, const char *expected, size_t actual_n);
702bool options_cmp_equal (char *actual, const char *expected);
703void options_warning (char *actual, const char *expected);
704
705#endif
706
707void options_postprocess (struct options *options);
708
709void pre_pull_save (struct options *o);
710void pre_pull_restore (struct options *o);
711
712bool apply_push_options (struct options *options,
713			 struct buffer *buf,
714			 unsigned int permission_mask,
715			 unsigned int *option_types_found,
716			 struct env_set *es);
717
718void options_detach (struct options *o);
719
720void options_server_import (struct options *o,
721			    const char *filename,
722			    int msglevel,
723			    unsigned int permission_mask,
724			    unsigned int *option_types_found,
725			    struct env_set *es);
726
727void pre_pull_default (struct options *o);
728
729void rol_check_alloc (struct options *options);
730
731int parse_line (const char *line,
732		char *p[],
733		const int n,
734		const char *file,
735		const int line_num,
736		int msglevel,
737		struct gc_arena *gc);
738
739/*
740 * parse/print topology coding
741 */
742
743int parse_topology (const char *str, const int msglevel);
744const char *print_topology (const int topology);
745
746/*
747 * Manage auth-retry variable
748 */
749
750#if P2MP
751
752#define AR_NONE       0
753#define AR_INTERACT   1
754#define AR_NOINTERACT 2
755
756int auth_retry_get (void);
757bool auth_retry_set (const int msglevel, const char *option);
758const char *auth_retry_print (void);
759
760#endif
761
762void options_string_import (struct options *options,
763			    const char *config,
764			    const int msglevel,
765			    const unsigned int permission_mask,
766			    unsigned int *option_types_found,
767			    struct env_set *es);
768
769bool get_ipv6_addr( const char * prefix_str, struct in6_addr *network,
770		    unsigned int * netbits, char ** printable_ipv6,
771		    int msglevel );
772
773/*
774 * inline functions
775 */
776static inline bool
777connection_list_defined (const struct options *o)
778{
779  return o->connection_list != NULL;
780}
781
782static inline void
783connection_list_set_no_advance (struct options *o)
784{
785  if (o->connection_list)
786    o->connection_list->no_advance = true;
787}
788
789#endif
790