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1 /* $OpenBSD: readconf.h,v 1.88 2010/11/13 23:27:50 djm Exp $ */
2 /* $FreeBSD$ */
3
4 /*
5  * Author: Tatu Ylonen <ylo@cs.hut.fi>
6  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
7  *                    All rights reserved
8  * Functions for reading the configuration file.
9  *
10  * As far as I am concerned, the code I have written for this software
11  * can be used freely for any purpose.  Any derived versions of this
12  * software must be clearly marked as such, and if the derived work is
13  * incompatible with the protocol description in the RFC file, it must be
14  * called by a name other than "ssh" or "Secure Shell".
15  */
16
17 #ifndef READCONF_H
18 #define READCONF_H
19
20 /* Data structure for representing a forwarding request. */
21
22 typedef struct {
23         char     *listen_host;          /* Host (address) to listen on. */
24         int       listen_port;          /* Port to forward. */
25         char     *connect_host;         /* Host to connect. */
26         int       connect_port;         /* Port to connect on connect_host. */
27         int       allocated_port;       /* Dynamically allocated listen port */
28 }       Forward;
29 /* Data structure for representing option data. */
30
31 #define MAX_SEND_ENV    256
32
33 typedef struct {
34         int     forward_agent;  /* Forward authentication agent. */
35         int     forward_x11;    /* Forward X11 display. */
36         int     forward_x11_timeout;    /* Expiration for Cookies */
37         int     forward_x11_trusted;    /* Trust Forward X11 display. */
38         int     exit_on_forward_failure;        /* Exit if bind(2) fails for -L/-R */
39         char   *xauth_location; /* Location for xauth program */
40         int     gateway_ports;  /* Allow remote connects to forwarded ports. */
41         int     use_privileged_port;    /* Don't use privileged port if false. */
42         int     rhosts_rsa_authentication;      /* Try rhosts with RSA
43                                                  * authentication. */
44         int     rsa_authentication;     /* Try RSA authentication. */
45         int     pubkey_authentication;  /* Try ssh2 pubkey authentication. */
46         int     hostbased_authentication;       /* ssh2's rhosts_rsa */
47         int     challenge_response_authentication;
48                                         /* Try S/Key or TIS, authentication. */
49         int     gss_authentication;     /* Try GSS authentication */
50         int     gss_deleg_creds;        /* Delegate GSS credentials */
51         int     password_authentication;        /* Try password
52                                                  * authentication. */
53         int     kbd_interactive_authentication; /* Try keyboard-interactive auth. */
54         char    *kbd_interactive_devices; /* Keyboard-interactive auth devices. */
55         int     zero_knowledge_password_authentication; /* Try jpake */
56         int     batch_mode;     /* Batch mode: do not ask for passwords. */
57         int     check_host_ip;  /* Also keep track of keys for IP address */
58         int     strict_host_key_checking;       /* Strict host key checking. */
59         int     compression;    /* Compress packets in both directions. */
60         int     compression_level;      /* Compression level 1 (fast) to 9
61                                          * (best). */
62         int     tcp_keep_alive; /* Set SO_KEEPALIVE. */
63         int     ip_qos_interactive;     /* IP ToS/DSCP/class for interactive */
64         int     ip_qos_bulk;            /* IP ToS/DSCP/class for bulk traffic */
65         LogLevel log_level;     /* Level for logging. */
66
67         int     port;           /* Port to connect. */
68         int     address_family;
69         int     connection_attempts;    /* Max attempts (seconds) before
70                                          * giving up */
71         int     connection_timeout;     /* Max time (seconds) before
72                                          * aborting connection attempt */
73         int     number_of_password_prompts;     /* Max number of password
74                                                  * prompts. */
75         int     cipher;         /* Cipher to use. */
76         char   *ciphers;        /* SSH2 ciphers in order of preference. */
77         char   *macs;           /* SSH2 macs in order of preference. */
78         char   *hostkeyalgorithms;      /* SSH2 server key types in order of preference. */
79         char   *kex_algorithms; /* SSH2 kex methods in order of preference. */
80         int     protocol;       /* Protocol in order of preference. */
81         char   *hostname;       /* Real host to connect. */
82         char   *host_key_alias; /* hostname alias for .ssh/known_hosts */
83         char   *proxy_command;  /* Proxy command for connecting the host. */
84         char   *user;           /* User to log in as. */
85         int     escape_char;    /* Escape character; -2 = none */
86
87         char   *system_hostfile;/* Path for /etc/ssh/ssh_known_hosts. */
88         char   *user_hostfile;  /* Path for $HOME/.ssh/known_hosts. */
89         char   *system_hostfile2;
90         char   *user_hostfile2;
91         char   *preferred_authentications;
92         char   *bind_address;   /* local socket address for connection to sshd */
93         char   *pkcs11_provider; /* PKCS#11 provider */
94         int     verify_host_key_dns;    /* Verify host key using DNS */
95
96         int     num_identity_files;     /* Number of files for RSA/DSA identities. */
97         char   *identity_files[SSH_MAX_IDENTITY_FILES];
98         Key    *identity_keys[SSH_MAX_IDENTITY_FILES];
99
100         /* Local TCP/IP forward requests. */
101         int     num_local_forwards;
102         Forward *local_forwards;
103
104         /* Remote TCP/IP forward requests. */
105         int     num_remote_forwards;
106         Forward *remote_forwards;
107         int     clear_forwardings;
108
109         int     enable_ssh_keysign;
110         int64_t rekey_limit;
111         int     no_host_authentication_for_localhost;
112         int     identities_only;
113         int     server_alive_interval;
114         int     server_alive_count_max;
115
116         int     num_send_env;
117         char   *send_env[MAX_SEND_ENV];
118
119         char    *control_path;
120         int     control_master;
121         int     control_persist; /* ControlPersist flag */
122         int     control_persist_timeout; /* ControlPersist timeout (seconds) */
123
124         int     hash_known_hosts;
125
126         int     tun_open;       /* tun(4) */
127         int     tun_local;      /* force tun device (optional) */
128         int     tun_remote;     /* force tun device (optional) */
129
130         char    *local_command;
131         int     permit_local_command;
132         int     visual_host_key;
133
134         int     use_roaming;
135
136         int     hpn_disabled;   /* Switch to disable HPN buffer management. */
137         int     hpn_buffer_size;        /* User definable size for HPN buffer
138                                          * window. */
139         int     tcp_rcv_buf_poll;       /* Option to poll recv buf every window
140                                          * transfer. */
141         int     tcp_rcv_buf;    /* User switch to set tcp recv buffer. */
142
143 #ifdef  NONE_CIPHER_ENABLED
144         int     none_enabled;   /* Allow none to be used */
145         int     none_switch;    /* Use none cipher */
146 #endif
147 }       Options;
148
149 #define SSHCTL_MASTER_NO        0
150 #define SSHCTL_MASTER_YES       1
151 #define SSHCTL_MASTER_AUTO      2
152 #define SSHCTL_MASTER_ASK       3
153 #define SSHCTL_MASTER_AUTO_ASK  4
154
155 void     initialize_options(Options *);
156 void     fill_default_options(Options *);
157 int      read_config_file(const char *, const char *, Options *, int);
158 int      parse_forward(Forward *, const char *, int, int);
159
160 int
161 process_config_line(Options *, const char *, char *, const char *, int, int *);
162
163 void     add_local_forward(Options *, const Forward *);
164 void     add_remote_forward(Options *, const Forward *);
165
166 #endif                          /* READCONF_H */