1 /* 2 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * All rights reserved 5 * Functions for reading the configuration file. 6 * 7 * As far as I am concerned, the code I have written for this software 8 * can be used freely for any purpose. Any derived versions of this 9 * software must be clearly marked as such, and if the derived work is 10 * incompatible with the protocol description in the RFC file, it must be 11 * called by a name other than "ssh" or "Secure Shell". 12 */ 13 14 /* RCSID("$OpenBSD: readconf.h,v 1.21 2000/09/07 20:27:53 deraadt Exp $"); */ 15 /* $FreeBSD$ */ 16 17 #ifndef READCONF_H 18 #define READCONF_H 19 20 /* Data structure for representing a forwarding request. */ 21 22 typedef struct { 23 u_short port; /* Port to forward. */ 24 char *host; /* Host to connect. */ 25 u_short host_port; /* Port to connect on host. */ 26 } Forward; 27 /* Data structure for representing option data. */ 28 29 typedef struct { 30 int forward_agent; /* Forward authentication agent. */ 31 int forward_x11; /* Forward X11 display. */ 32 char *xauth_location; /* Location for xauth program */ 33 int gateway_ports; /* Allow remote connects to forwarded ports. */ 34 int use_privileged_port; /* Don't use privileged port if false. */ 35 int rhosts_authentication; /* Try rhosts authentication. */ 36 int rhosts_rsa_authentication; /* Try rhosts with RSA 37 * authentication. */ 38 int rsa_authentication; /* Try RSA authentication. */ 39 int dsa_authentication; /* Try DSA authentication. */ 40 int skey_authentication; /* Try S/Key or TIS authentication. */ 41 #ifdef KRB4 42 int krb4_authentication; /* Try Kerberos v4 43 * authentication. */ 44 #endif 45 46 #ifdef KRB5 47 int krb5_authentication; 48 int krb5_tgt_passing; 49 #endif /* KRB5 */ 50 51 #ifdef AFS 52 int krb4_tgt_passing; /* Try Kerberos v4 tgt passing. */ 53 int afs_token_passing; /* Try AFS token passing. */ 54 #endif 55 int password_authentication; /* Try password 56 * authentication. */ 57 int fallback_to_rsh;/* Use rsh if cannot connect with ssh. */ 58 int use_rsh; /* Always use rsh (don\'t try ssh). */ 59 int batch_mode; /* Batch mode: do not ask for passwords. */ 60 int check_host_ip; /* Also keep track of keys for IP address */ 61 int strict_host_key_checking; /* Strict host key checking. */ 62 int compression; /* Compress packets in both directions. */ 63 int compression_level; /* Compression level 1 (fast) to 9 64 * (best). */ 65 int keepalives; /* Set SO_KEEPALIVE. */ 66 LogLevel log_level; /* Level for logging. */ 67 68 int port; /* Port to connect. */ 69 int connection_attempts; /* Max attempts (seconds) before 70 * giving up */ 71 int number_of_password_prompts; /* Max number of password 72 * prompts. */ 73 int cipher; /* Cipher to use. */ 74 char *ciphers; /* SSH2 ciphers in order of preference. */ 75 int protocol; /* Protocol in order of preference. */ 76 char *hostname; /* Real host to connect. */ 77 char *proxy_command; /* Proxy command for connecting the host. */ 78 char *user; /* User to log in as. */ 79 int escape_char; /* Escape character; -2 = none */ 80 81 char *system_hostfile;/* Path for /etc/ssh_known_hosts. */ 82 char *user_hostfile; /* Path for $HOME/.ssh/known_hosts. */ 83 char *system_hostfile2; 84 char *user_hostfile2; 85 86 int num_identity_files; /* Number of files for RSA identities. */ 87 int num_identity_files2; /* DSA identities. */ 88 char *identity_files[SSH_MAX_IDENTITY_FILES]; 89 char *identity_files2[SSH_MAX_IDENTITY_FILES]; 90 91 /* Local TCP/IP forward requests. */ 92 int num_local_forwards; 93 Forward local_forwards[SSH_MAX_FORWARDS_PER_DIRECTION]; 94 95 /* Remote TCP/IP forward requests. */ 96 int num_remote_forwards; 97 Forward remote_forwards[SSH_MAX_FORWARDS_PER_DIRECTION]; 98 } Options; 99 100 101 /* 102 * Initializes options to special values that indicate that they have not yet 103 * been set. Read_config_file will only set options with this value. Options 104 * are processed in the following order: command line, user config file, 105 * system config file. Last, fill_default_options is called. 106 */ 107 void initialize_options(Options * options); 108 109 /* 110 * Called after processing other sources of option data, this fills those 111 * options for which no value has been specified with their default values. 112 */ 113 void fill_default_options(Options * options); 114 115 /* 116 * Processes a single option line as used in the configuration files. This 117 * only sets those values that have not already been set. Returns 0 for legal 118 * options 119 */ 120 int 121 process_config_line(Options * options, const char *host, 122 char *line, const char *filename, int linenum, 123 int *activep); 124 125 /* 126 * Reads the config file and modifies the options accordingly. Options 127 * should already be initialized before this call. This never returns if 128 * there is an error. If the file does not exist, this returns immediately. 129 */ 130 void 131 read_config_file(const char *filename, const char *host, 132 Options * options); 133 134 /* 135 * Adds a local TCP/IP port forward to options. Never returns if there is an 136 * error. 137 */ 138 void 139 add_local_forward(Options * options, u_short port, const char *host, 140 u_short host_port); 141 142 /* 143 * Adds a remote TCP/IP port forward to options. Never returns if there is 144 * an error. 145 */ 146 void 147 add_remote_forward(Options * options, u_short port, const char *host, 148 u_short host_port); 149 150 #endif /* READCONF_H */ 151