Imported Upstream version 2.3_rc1

1 files changed, 788 insertions, 0 deletions

diff --git a/src/openvpn/options.h b/src/openvpn/options.h
new file mode 100644
index 0000000..306520b
--- /dev/null
+++ b/src/openvpn/options.h
@@ -0,0 +1,788 @@
+/*
+ *  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) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net>
+ *
+ *  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)
+ */
+
+#ifndef OPTIONS_H
+#define OPTIONS_H
+
+#include "basic.h"
+#include "common.h"
+#include "mtu.h"
+#include "route.h"
+#include "tun.h"
+#include "socket.h"
+#include "plugin.h"
+#include "manage.h"
+#include "proxy.h"
+#include "lzo.h"
+#include "pushlist.h"
+#include "clinat.h"
+
+/*
+ * Maximum number of parameters associated with an option,
+ * including the option name itself.
+ */
+#define MAX_PARMS 16
+
+/*
+ * Max size of options line and parameter.
+ */
+#define OPTION_PARM_SIZE 256
+#define OPTION_LINE_SIZE 256
+
+extern const char title_string[];
+
+#if P2MP
+
+/* certain options are saved before --pull modifications are applied */
+struct options_pre_pull
+{
+  bool tuntap_options_defined;
+  struct tuntap_options tuntap_options;
+
+  bool routes_defined;
+  struct route_option_list *routes;
+
+  bool routes_ipv6_defined;
+  struct route_ipv6_option_list *routes_ipv6;
+
+#ifdef ENABLE_CLIENT_NAT
+  bool client_nat_defined;
+  struct client_nat_option_list *client_nat;
+#endif
+
+  int foreign_option_index;
+};
+
+#endif
+#if defined(ENABLE_CRYPTO) && !defined(ENABLE_CRYPTO_OPENSSL) && !defined(ENABLE_CRYPTO_POLARSSL)
+# error "At least one of OpenSSL or PolarSSL needs to be defined."
+#endif
+
+struct connection_entry
+{
+  int proto;
+  int local_port;
+  bool local_port_defined;
+  int remote_port;
+  const char *local;
+  const char *remote;
+  bool remote_float;
+  bool bind_defined;
+  bool bind_local;
+  int connect_retry_seconds;
+  bool connect_retry_defined;
+  int connect_retry_max;
+  int connect_timeout;
+  bool connect_timeout_defined;
+#ifdef ENABLE_HTTP_PROXY
+  struct http_proxy_options *http_proxy_options;
+#endif  
+#ifdef ENABLE_SOCKS
+  const char *socks_proxy_server;
+  int socks_proxy_port;
+  const char *socks_proxy_authfile;
+  bool socks_proxy_retry;
+#endif
+
+  int tun_mtu;           /* MTU of tun device */
+  bool tun_mtu_defined;  /* true if user overriding parm with command line option */
+  int tun_mtu_extra;
+  bool tun_mtu_extra_defined;
+  int link_mtu;          /* MTU of device over which tunnel packets pass via TCP/UDP */
+  bool link_mtu_defined; /* true if user overriding parm with command line option */
+
+  /* Advanced MTU negotiation and datagram fragmentation options */
+  int mtu_discover_type; /* used if OS supports setting Path MTU discovery options on socket */
+
+  int fragment;          /* internal fragmentation size */
+  int mssfix;            /* Upper bound on TCP MSS */
+  bool mssfix_default;   /* true if --mssfix was supplied without a parameter */
+
+#ifdef ENABLE_OCC
+  int explicit_exit_notification;  /* Explicitly tell peer when we are exiting via OCC_EXIT message */
+#endif
+
+# define CE_DISABLED (1<<0)
+# define CE_MAN_QUERY_PROXY (1<<1)
+# define CE_MAN_QUERY_REMOTE_UNDEF  0
+# define CE_MAN_QUERY_REMOTE_QUERY  1
+# define CE_MAN_QUERY_REMOTE_ACCEPT 2
+# define CE_MAN_QUERY_REMOTE_MOD    3
+# define CE_MAN_QUERY_REMOTE_SKIP   4
+# define CE_MAN_QUERY_REMOTE_MASK   (0x07)
+# define CE_MAN_QUERY_REMOTE_SHIFT  (2)
+  unsigned int flags;
+};
+
+struct remote_entry
+{
+  const char *remote;
+  int remote_port;
+  int proto;
+};
+
+#define CONNECTION_LIST_SIZE 64
+
+struct connection_list
+{
+  int len;
+  int current;
+  int n_cycles;
+  bool no_advance;
+  struct connection_entry *array[CONNECTION_LIST_SIZE];
+};
+
+struct remote_list
+{
+  int len;
+  struct remote_entry *array[CONNECTION_LIST_SIZE];
+};
+
+struct remote_host_store
+{
+# define RH_HOST_LEN 80
+  char host[RH_HOST_LEN];
+};
+
+/* Command line options */
+struct options
+{
+  struct gc_arena gc;
+  bool gc_owned;
+
+  /* first config file */
+  const char *config;
+
+  /* major mode */
+# define MODE_POINT_TO_POINT 0
+# define MODE_SERVER         1
+  int mode;
+
+  /* enable forward compatibility for post-2.1 features */
+  bool forward_compatible;
+
+  /* persist parms */
+  bool persist_config;
+  int persist_mode;
+
+#ifdef ENABLE_CRYPTO
+  const char *key_pass_file;
+  bool show_ciphers;
+  bool show_digests;
+  bool show_engines;
+#ifdef ENABLE_SSL
+  bool show_tls_ciphers;
+#endif
+  bool genkey;
+#endif
+
+  /* Networking parms */
+  struct connection_entry ce;
+  char *remote_ip_hint;
+  struct connection_list *connection_list;
+  struct remote_list *remote_list;
+  bool force_connection_list;
+
+#if HTTP_PROXY_OVERRIDE
+  struct http_proxy_options *http_proxy_override;
+#endif
+
+  struct remote_host_store *rh_store;
+
+  bool remote_random;
+  const char *ipchange;
+  const char *dev;
+  const char *dev_type;
+  const char *dev_node;
+  const char *lladdr;
+  int topology; /* one of the TOP_x values from proto.h */
+  const char *ifconfig_local;
+  const char *ifconfig_remote_netmask;
+  const char *ifconfig_ipv6_local;
+  int         ifconfig_ipv6_netbits;
+  const char *ifconfig_ipv6_remote;
+  bool ifconfig_noexec;
+  bool ifconfig_nowarn;
+#ifdef ENABLE_FEATURE_SHAPER
+  int shaper;
+#endif
+
+  int proto_force;
+
+#ifdef ENABLE_OCC
+  bool mtu_test;
+#endif
+
+#ifdef ENABLE_MEMSTATS
+  char *memstats_fn;
+#endif
+
+  bool mlock;
+
+  int keepalive_ping;           /* a proxy for ping/ping-restart */
+  int keepalive_timeout;
+
+  int inactivity_timeout;       /* --inactive */
+  int inactivity_minimum_bytes;
+
+  int ping_send_timeout;        /* Send a TCP/UDP ping to remote every n seconds */
+  int ping_rec_timeout;         /* Expect a TCP/UDP ping from remote at least once every n seconds */
+  bool ping_timer_remote;       /* Run ping timer only if we have a remote address */
+  bool tun_ipv6;                /* Build tun dev that supports IPv6 */
+
+# define PING_UNDEF   0
+# define PING_EXIT    1
+# define PING_RESTART 2
+  int ping_rec_timeout_action;  /* What action to take on ping_rec_timeout (exit or restart)? */
+
+  bool persist_tun;             /* Don't close/reopen TUN/TAP dev on SIGUSR1 or PING_RESTART */
+  bool persist_local_ip;        /* Don't re-resolve local address on SIGUSR1 or PING_RESTART */
+  bool persist_remote_ip;       /* Don't re-resolve remote address on SIGUSR1 or PING_RESTART */
+  bool persist_key;             /* Don't re-read key files on SIGUSR1 or PING_RESTART */
+
+#if PASSTOS_CAPABILITY
+  bool passtos;                  
+#endif
+
+  int resolve_retry_seconds;    /* If hostname resolve fails, retry for n seconds */
+
+  struct tuntap_options tuntap_options;
+
+  /* Misc parms */
+  const char *username;
+  const char *groupname;
+  const char *chroot_dir;
+  const char *cd_dir;
+#ifdef ENABLE_SELINUX
+  char *selinux_context;
+#endif
+  const char *writepid;
+  const char *up_script;
+  const char *down_script;
+  bool down_pre;
+  bool up_delay;
+  bool up_restart;
+  bool daemon;
+
+  int remap_sigusr1;
+
+  /* inetd modes defined in socket.h */
+  int inetd;
+
+  bool log;
+  bool suppress_timestamps;
+  int nice;
+  int verbosity;
+  int mute;
+
+#ifdef ENABLE_DEBUG
+  int gremlin;
+#endif
+
+  const char *status_file;
+  int status_file_version;
+  int status_file_update_freq;
+
+  /* optimize TUN/TAP/UDP writes */
+  bool fast_io;
+
+#ifdef ENABLE_LZO
+  /* LZO_x flags from lzo.h */
+  unsigned int lzo;
+#endif
+
+  /* buffer sizes */
+  int rcvbuf;
+  int sndbuf;
+
+  /* mark value */
+  int mark;
+
+  /* socket flags */
+  unsigned int sockflags;
+
+  /* route management */
+  const char *route_script;
+  const char *route_predown_script;
+  const char *route_default_gateway;
+  int route_default_metric;
+  bool route_noexec;
+  int route_delay;
+  int route_delay_window;
+  bool route_delay_defined;
+  int max_routes;
+  struct route_option_list *routes;
+  struct route_ipv6_option_list *routes_ipv6;			/* IPv6 */
+  bool route_nopull;
+  bool route_gateway_via_dhcp;
+  bool allow_pull_fqdn; /* as a client, allow server to push a FQDN for certain parameters */
+
+#ifdef ENABLE_CLIENT_NAT
+  struct client_nat_option_list *client_nat;
+#endif
+
+#ifdef ENABLE_OCC
+  /* Enable options consistency check between peers */
+  bool occ;
+#endif
+
+#ifdef ENABLE_MANAGEMENT
+  const char *management_addr;
+  int management_port;
+  const char *management_user_pass;
+  int management_log_history_cache;
+  int management_echo_buffer_size;
+  int management_state_buffer_size;
+  const char *management_write_peer_info_file;
+
+  const char *management_client_user;
+  const char *management_client_group;
+
+  /* Mask of MF_ values of manage.h */
+  unsigned int management_flags;
+#endif
+
+#ifdef ENABLE_PLUGIN
+  struct plugin_option_list *plugin_list;
+#endif
+
+
+
+#if P2MP
+
+#if P2MP_SERVER
+  /* the tmp dir is for now only used in the P2P server context */
+  const char *tmp_dir;
+  bool server_defined;
+  in_addr_t server_network;
+  in_addr_t server_netmask;
+  bool server_ipv6_defined;				/* IPv6 */
+  struct in6_addr server_network_ipv6;			/* IPv6 */
+  unsigned int    server_netbits_ipv6;			/* IPv6 */
+
+# define SF_NOPOOL (1<<0)
+# define SF_TCP_NODELAY_HELPER (1<<1)
+# define SF_NO_PUSH_ROUTE_GATEWAY (1<<2)
+  unsigned int server_flags;
+
+  bool server_bridge_proxy_dhcp;
+
+  bool server_bridge_defined;
+  in_addr_t server_bridge_ip;
+  in_addr_t server_bridge_netmask;
+  in_addr_t server_bridge_pool_start;
+  in_addr_t server_bridge_pool_end;
+
+  struct push_list push_list;
+  bool ifconfig_pool_defined;
+  in_addr_t ifconfig_pool_start;
+  in_addr_t ifconfig_pool_end;
+  in_addr_t ifconfig_pool_netmask;
+  const char *ifconfig_pool_persist_filename;
+  int ifconfig_pool_persist_refresh_freq;
+
+  bool   ifconfig_ipv6_pool_defined;			/* IPv6 */
+  struct in6_addr ifconfig_ipv6_pool_base;		/* IPv6 */
+  int    ifconfig_ipv6_pool_netbits;			/* IPv6 */
+
+  int real_hash_size;
+  int virtual_hash_size;
+  const char *client_connect_script;
+  const char *client_disconnect_script;
+  const char *learn_address_script;
+  const char *client_config_dir;
+  bool ccd_exclusive;
+  bool disable;
+  int n_bcast_buf;
+  int tcp_queue_limit;
+  struct iroute *iroutes;
+  struct iroute_ipv6 *iroutes_ipv6;			/* IPv6 */
+  bool push_ifconfig_defined;
+  in_addr_t push_ifconfig_local;
+  in_addr_t push_ifconfig_remote_netmask;
+#ifdef ENABLE_CLIENT_NAT
+  in_addr_t push_ifconfig_local_alias;
+#endif
+  bool push_ifconfig_constraint_defined;
+  in_addr_t push_ifconfig_constraint_network;
+  in_addr_t push_ifconfig_constraint_netmask;
+  bool            push_ifconfig_ipv6_defined;		/* IPv6 */
+  struct in6_addr push_ifconfig_ipv6_local;		/* IPv6 */
+  int 		  push_ifconfig_ipv6_netbits;		/* IPv6 */
+  struct in6_addr push_ifconfig_ipv6_remote;		/* IPv6 */
+  bool enable_c2c;
+  bool duplicate_cn;
+  int cf_max;
+  int cf_per;
+  int max_clients;
+  int max_routes_per_client;
+  int stale_routes_check_interval;
+  int stale_routes_ageing_time;
+
+  const char *auth_user_pass_verify_script;
+  bool auth_user_pass_verify_script_via_file;
+#if PORT_SHARE
+  char *port_share_host;
+  int port_share_port;
+  const char *port_share_journal_dir;
+#endif
+#endif
+
+  bool client;
+  bool pull; /* client pull of config options from server */
+  int push_continuation;
+  const char *auth_user_pass_file;
+  struct options_pre_pull *pre_pull;
+
+  int server_poll_timeout;
+
+  int scheduled_exit_interval;
+
+#ifdef ENABLE_CLIENT_CR
+  struct static_challenge_info sc_info;
+#endif
+#endif
+
+#ifdef ENABLE_CRYPTO
+  /* Cipher parms */
+  const char *shared_secret_file;
+  const char *shared_secret_file_inline;
+  int key_direction;
+  bool ciphername_defined;
+  const char *ciphername;
+  bool authname_defined;
+  const char *authname;
+  int keysize;
+  const char *prng_hash;
+  int prng_nonce_secret_len;
+  const char *engine;
+  bool replay;
+  bool mute_replay_warnings;
+  int replay_window;
+  int replay_time;
+  const char *packet_id_file;
+  bool use_iv;
+  bool test_crypto;
+#ifdef ENABLE_PREDICTION_RESISTANCE
+  bool use_prediction_resistance;
+#endif
+
+#ifdef ENABLE_SSL
+  /* TLS (control channel) parms */
+  bool tls_server;
+  bool tls_client;
+  const char *ca_file;
+  const char *ca_path;
+  const char *dh_file;
+  const char *cert_file;
+  const char *extra_certs_file;
+  const char *priv_key_file;
+  const char *pkcs12_file;
+  const char *cipher_list;
+  const char *tls_verify;
+  const char *tls_export_cert;
+  const char *tls_remote;
+  const char *crl_file;
+
+  const char *ca_file_inline;
+  const char *cert_file_inline;
+  const char *extra_certs_file_inline;
+  char *priv_key_file_inline;
+  const char *dh_file_inline;
+  const char *pkcs12_file_inline; /* contains the base64 encoding of pkcs12 file */
+
+  int ns_cert_type; /* set to 0, NS_CERT_CHECK_SERVER, or NS_CERT_CHECK_CLIENT */
+  unsigned remote_cert_ku[MAX_PARMS];
+  const char *remote_cert_eku;
+  uint8_t *verify_hash;
+  unsigned int ssl_flags; /* set to SSLF_x flags from ssl.h */
+
+#ifdef ENABLE_PKCS11
+  const char *pkcs11_providers[MAX_PARMS];
+  unsigned pkcs11_private_mode[MAX_PARMS];
+  bool pkcs11_protected_authentication[MAX_PARMS];
+  bool pkcs11_cert_private[MAX_PARMS];
+  int pkcs11_pin_cache_period;
+  const char *pkcs11_id;
+  bool pkcs11_id_management;
+#endif
+
+#ifdef ENABLE_CRYPTOAPI
+  const char *cryptoapi_cert;
+#endif
+
+  /* data channel key exchange method */
+  int key_method;
+
+  /* Per-packet timeout on control channel */
+  int tls_timeout;
+
+  /* Data channel key renegotiation parameters */
+  int renegotiate_bytes;
+  int renegotiate_packets;
+  int renegotiate_seconds;
+
+  /* Data channel key handshake must finalize
+     within n seconds of handshake initiation. */
+  int handshake_window;
+
+#ifdef ENABLE_X509ALTUSERNAME
+  /* Field used to be the username in X509 cert. */
+  char *x509_username_field;
+#endif
+
+  /* Old key allowed to live n seconds after new key goes active */
+  int transition_window;
+
+  /* Special authentication MAC for TLS control channel */
+  const char *tls_auth_file;		/* shared secret */
+  const char *tls_auth_file_inline;
+
+  /* Allow only one session */
+  bool single_session;
+
+#ifdef ENABLE_PUSH_PEER_INFO
+  bool push_peer_info;
+#endif
+
+  bool tls_exit;
+
+#endif /* ENABLE_SSL */
+#endif /* ENABLE_CRYPTO */
+
+#ifdef ENABLE_X509_TRACK
+  const struct x509_track *x509_track;
+#endif
+
+  /* special state parms */
+  int foreign_option_index;
+
+#ifdef WIN32
+  const char *exit_event_name;
+  bool exit_event_initial_state;
+  bool show_net_up;
+  int route_method;
+#endif
+};
+
+#define streq(x, y) (!strcmp((x), (y)))
+
+/*
+ * Option classes.
+ */
+#define OPT_P_GENERAL         (1<<0)
+#define OPT_P_UP              (1<<1)
+#define OPT_P_ROUTE           (1<<2)
+#define OPT_P_IPWIN32         (1<<3)
+#define OPT_P_SCRIPT          (1<<4)
+#define OPT_P_SETENV          (1<<5)
+#define OPT_P_SHAPER          (1<<6)
+#define OPT_P_TIMER           (1<<7)
+#define OPT_P_PERSIST         (1<<8)
+#define OPT_P_PERSIST_IP      (1<<9)
+#define OPT_P_COMP            (1<<10) /* TODO */
+#define OPT_P_MESSAGES        (1<<11)
+#define OPT_P_CRYPTO          (1<<12) /* TODO */
+#define OPT_P_TLS_PARMS       (1<<13) /* TODO */
+#define OPT_P_MTU             (1<<14) /* TODO */
+#define OPT_P_NICE            (1<<15)
+#define OPT_P_PUSH            (1<<16)
+#define OPT_P_INSTANCE        (1<<17)
+#define OPT_P_CONFIG          (1<<18)
+#define OPT_P_EXPLICIT_NOTIFY (1<<19)
+#define OPT_P_ECHO            (1<<20)
+#define OPT_P_INHERIT         (1<<21)
+#define OPT_P_ROUTE_EXTRAS    (1<<22)
+#define OPT_P_PULL_MODE       (1<<23)
+#define OPT_P_PLUGIN          (1<<24)
+#define OPT_P_SOCKBUF         (1<<25)
+#define OPT_P_SOCKFLAGS       (1<<26)
+#define OPT_P_CONNECTION      (1<<27)
+
+#define OPT_P_DEFAULT   (~(OPT_P_INSTANCE|OPT_P_PULL_MODE))
+
+#if P2MP
+#define PULL_DEFINED(opt) ((opt)->pull)
+#if P2MP_SERVER
+#define PUSH_DEFINED(opt) ((opt)->push_list)
+#endif
+#endif
+
+#ifndef PULL_DEFINED
+#define PULL_DEFINED(opt) (false)
+#endif
+
+#ifndef PUSH_DEFINED
+#define PUSH_DEFINED(opt) (false)
+#endif
+
+#ifdef WIN32
+#define ROUTE_OPTION_FLAGS(o) ((o)->route_method & ROUTE_METHOD_MASK)
+#else
+#define ROUTE_OPTION_FLAGS(o) (0)
+#endif
+
+#ifdef ENABLE_FEATURE_SHAPER
+#define SHAPER_DEFINED(opt) ((opt)->shaper)
+#else
+#define SHAPER_DEFINED(opt) (false)
+#endif
+
+#ifdef ENABLE_PLUGIN
+#define PLUGIN_OPTION_LIST(opt) ((opt)->plugin_list)
+#else
+#define PLUGIN_OPTION_LIST(opt) (NULL)
+#endif
+
+#ifdef MANAGEMENT_DEF_AUTH
+#define MAN_CLIENT_AUTH_ENABLED(opt) ((opt)->management_flags & MF_CLIENT_AUTH)
+#else
+#define MAN_CLIENT_AUTH_ENABLED(opt) (false)
+#endif
+
+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);
+
+void notnull (const char *arg, const char *description);
+
+void usage_small (void);
+
+void init_options (struct options *o, const bool init_gc);
+void uninit_options (struct options *o);
+
+void setenv_settings (struct env_set *es, const struct options *o);
+void show_settings (const struct options *o);
+
+bool string_defined_equal (const char *s1, const char *s2);
+
+#ifdef ENABLE_OCC
+
+const char *options_string_version (const char* s, struct gc_arena *gc);
+
+char *options_string (const struct options *o,
+		      const struct frame *frame,
+		      struct tuntap *tt,
+		      bool remote,
+		      struct gc_arena *gc);
+
+bool options_cmp_equal_safe (char *actual, const char *expected, size_t actual_n);
+void options_warning_safe (char *actual, const char *expected, size_t actual_n);
+bool options_cmp_equal (char *actual, const char *expected);
+void options_warning (char *actual, const char *expected);
+
+#endif
+
+void options_postprocess (struct options *options);
+
+void pre_pull_save (struct options *o);
+void pre_pull_restore (struct options *o);
+
+bool apply_push_options (struct options *options,
+			 struct buffer *buf,
+			 unsigned int permission_mask,
+			 unsigned int *option_types_found,
+			 struct env_set *es);
+
+void options_detach (struct options *o);
+
+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);
+
+void pre_pull_default (struct options *o);
+
+void rol_check_alloc (struct options *options);
+
+int parse_line (const char *line,
+		char *p[],
+		const int n,
+		const char *file,
+		const int line_num,
+		int msglevel,
+		struct gc_arena *gc);
+
+/*
+ * parse/print topology coding
+ */
+
+int parse_topology (const char *str, const int msglevel);
+const char *print_topology (const int topology);
+
+/*
+ * Manage auth-retry variable
+ */
+
+#if P2MP
+
+#define AR_NONE       0
+#define AR_INTERACT   1
+#define AR_NOINTERACT 2
+
+int auth_retry_get (void);
+bool auth_retry_set (const int msglevel, const char *option);
+const char *auth_retry_print (void);
+
+#endif
+
+void options_string_import (struct options *options,
+			    const char *config,
+			    const int msglevel,
+			    const unsigned int permission_mask,
+			    unsigned int *option_types_found,
+			    struct env_set *es);
+
+bool get_ipv6_addr( const char * prefix_str, struct in6_addr *network,
+		    unsigned int * netbits, char ** printable_ipv6, 
+		    int msglevel );
+
+/*
+ * inline functions
+ */
+static inline bool
+connection_list_defined (const struct options *o)
+{
+  return o->connection_list != NULL;
+}
+
+static inline void
+connection_list_set_no_advance (struct options *o)
+{
+  if (o->connection_list)
+    o->connection_list->no_advance = true;
+}
+
+#endif