Mercurial > dropbear
annotate cli-runopts.c @ 519:a1b7c6cdd48a
Only use -lcrypt for Dropbear server binary
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 17 Nov 2008 14:04:14 +0000 |
parents | a3748e54273c |
children | 6c906f903f1d 69e98c45db7c |
rev | line source |
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1 /* |
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2 * Dropbear - a SSH2 server |
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3 * |
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4 * Copyright (c) 2002,2003 Matt Johnston |
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5 * All rights reserved. |
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6 * |
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
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8 * of this software and associated documentation files (the "Software"), to deal |
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9 * in the Software without restriction, including without limitation the rights |
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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11 * copies of the Software, and to permit persons to whom the Software is |
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12 * furnished to do so, subject to the following conditions: |
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13 * |
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14 * The above copyright notice and this permission notice shall be included in |
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15 * all copies or substantial portions of the Software. |
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16 * |
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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23 * SOFTWARE. */ |
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24 |
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25 #include "includes.h" |
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26 #include "runopts.h" |
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27 #include "signkey.h" |
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28 #include "buffer.h" |
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29 #include "dbutil.h" |
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30 #include "algo.h" |
64 | 31 #include "tcpfwd.h" |
39
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32 |
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33 cli_runopts cli_opts; /* GLOBAL */ |
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34 |
47 | 35 static void printhelp(); |
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36 static void parse_hostname(const char* orighostarg); |
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37 static void parse_multihop_hostname(const char* orighostarg, const char* argv0); |
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38 static void fill_own_user(); |
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39 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 40 static void loadidentityfile(const char* filename); |
41 #endif | |
64 | 42 #ifdef ENABLE_CLI_ANYTCPFWD |
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43 static void addforward(const char* str, struct TCPFwdList** fwdlist); |
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44 #endif |
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45 #ifdef ENABLE_CLI_NETCAT |
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46 static void add_netcat(const char *str); |
64 | 47 #endif |
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48 |
47 | 49 static void printhelp() { |
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50 |
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51 fprintf(stderr, "Dropbear client v%s\n" |
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52 #ifdef ENABLE_CLI_MULTIHOP |
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53 "Usage: %s [options] [user@]host[/port][,[user@]host/port],...] [command]\n" |
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54 #else |
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55 "Usage: %s [options] [user@]host[/port] [command]\n" |
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56 #endif |
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57 "Options are:\n" |
47 | 58 "-p <remoteport>\n" |
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59 "-l <username>\n" |
56
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60 "-t Allocate a pty\n" |
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61 "-T Don't allocate a pty\n" |
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62 "-N Don't run a remote command\n" |
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63 "-f Run in background after auth\n" |
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64 "-y Always accept remote host key if unknown\n" |
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65 "-s Request a subsystem (use for sftp)\n" |
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66 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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67 "-i <identityfile> (multiple allowed)\n" |
47 | 68 #endif |
64 | 69 #ifdef ENABLE_CLI_LOCALTCPFWD |
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70 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
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71 "-g Allow remote hosts to connect to forwarded ports\n" |
62 | 72 #endif |
64 | 73 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 74 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
75 #endif | |
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76 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
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77 "-K <keepalive> (0 is never, default %d)\n" |
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78 "-I <idle_timeout> (0 is never, default %d)\n" |
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79 #ifdef ENABLE_CLI_NETCAT |
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80 "-B <endhost:endport> Netcat-alike forwarding\n" |
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81 #endif |
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82 #ifdef ENABLE_CLI_PROXYCMD |
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83 "-J <proxy_program> Use program pipe rather than TCP connection\n" |
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84 #endif |
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85 #ifdef DEBUG_TRACE |
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86 "-v verbose (compiled with DEBUG_TRACE)\n" |
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87 #endif |
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88 ,DROPBEAR_VERSION, cli_opts.progname, |
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89 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); |
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90 |
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91 } |
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92 |
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93 void cli_getopts(int argc, char ** argv) { |
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94 |
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95 unsigned int i, j; |
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96 char ** next = 0; |
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97 unsigned int cmdlen; |
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98 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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99 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
47 | 100 #endif |
64 | 101 #ifdef ENABLE_CLI_LOCALTCPFWD |
62 | 102 int nextislocal = 0; |
103 #endif | |
64 | 104 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 105 int nextisremote = 0; |
106 #endif | |
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107 #ifdef ENABLE_CLI_NETCAT |
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108 int nextisnetcat = 0; |
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109 #endif |
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110 char* dummy = NULL; /* Not used for anything real */ |
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111 |
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112 char* recv_window_arg = NULL; |
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113 char* keepalive_arg = NULL; |
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114 char* idle_timeout_arg = NULL; |
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115 |
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116 /* see printhelp() for options */ |
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117 cli_opts.progname = argv[0]; |
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118 cli_opts.remotehost = NULL; |
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119 cli_opts.remoteport = NULL; |
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120 cli_opts.username = NULL; |
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121 cli_opts.cmd = NULL; |
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122 cli_opts.no_cmd = 0; |
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123 cli_opts.backgrounded = 0; |
47 | 124 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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125 cli_opts.always_accept_key = 0; |
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126 cli_opts.is_subsystem = 0; |
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127 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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128 cli_opts.privkeys = NULL; |
47 | 129 #endif |
64 | 130 #ifdef ENABLE_CLI_LOCALTCPFWD |
131 cli_opts.localfwds = NULL; | |
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132 opts.listen_fwd_all = 0; |
62 | 133 #endif |
64 | 134 #ifdef ENABLE_CLI_REMOTETCPFWD |
135 cli_opts.remotefwds = NULL; | |
62 | 136 #endif |
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137 #ifdef ENABLE_CLI_PROXYCMD |
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138 cli_opts.proxycmd = NULL; |
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139 #endif |
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140 /* not yet |
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141 opts.ipv4 = 1; |
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142 opts.ipv6 = 1; |
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143 */ |
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144 opts.recv_window = DEFAULT_RECV_WINDOW; |
39
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145 |
483
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146 fill_own_user(); |
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147 |
47 | 148 /* Iterate all the arguments */ |
46
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149 for (i = 1; i < (unsigned int)argc; i++) { |
68
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150 #ifdef ENABLE_CLI_PUBKEY_AUTH |
46
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151 if (nextiskey) { |
47 | 152 /* Load a hostkey since the previous argument was "-i" */ |
153 loadidentityfile(argv[i]); | |
154 nextiskey = 0; | |
155 continue; | |
39
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156 } |
47 | 157 #endif |
64 | 158 #ifdef ENABLE_CLI_REMOTETCPFWD |
159 if (nextisremote) { | |
165
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160 TRACE(("nextisremote true")) |
64 | 161 addforward(argv[i], &cli_opts.remotefwds); |
162 nextisremote = 0; | |
163 continue; | |
164 } | |
165 #endif | |
166 #ifdef ENABLE_CLI_LOCALTCPFWD | |
167 if (nextislocal) { | |
165
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168 TRACE(("nextislocal true")) |
64 | 169 addforward(argv[i], &cli_opts.localfwds); |
170 nextislocal = 0; | |
171 continue; | |
172 } | |
173 #endif | |
485
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174 #ifdef ENABLE_CLI_NETCAT |
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175 if (nextisnetcat) { |
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176 TRACE(("nextisnetcat true")) |
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177 add_netcat(argv[i]); |
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178 nextisnetcat = 0; |
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179 continue; |
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180 } |
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181 #endif |
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182 if (next) { |
47 | 183 /* The previous flag set a value to assign */ |
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184 *next = argv[i]; |
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185 if (*next == NULL) { |
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186 dropbear_exit("Invalid null argument"); |
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187 } |
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188 next = NULL; |
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189 continue; |
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190 } |
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191 |
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192 if (argv[i][0] == '-') { |
47 | 193 /* A flag *waves* */ |
46
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194 |
39
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195 switch (argv[i][1]) { |
418
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196 case 'y': /* always accept the remote hostkey */ |
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197 cli_opts.always_accept_key = 1; |
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198 break; |
47 | 199 case 'p': /* remoteport */ |
46
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200 next = &cli_opts.remoteport; |
39
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201 break; |
68
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202 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 203 case 'i': /* an identityfile */ |
134 | 204 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
205 if (strlen(argv[i]) > 2) { | |
206 loadidentityfile(&argv[i][2]); | |
207 } else { | |
208 nextiskey = 1; | |
209 } | |
39
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210 break; |
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211 #endif |
47 | 212 case 't': /* we want a pty */ |
213 cli_opts.wantpty = 1; | |
214 break; | |
215 case 'T': /* don't want a pty */ | |
216 cli_opts.wantpty = 0; | |
217 break; | |
325
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218 case 'N': |
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219 cli_opts.no_cmd = 1; |
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220 break; |
326
d965110e3f5c
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221 case 'f': |
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222 cli_opts.backgrounded = 1; |
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223 break; |
497
ae600f1eef81
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224 case 's': |
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225 cli_opts.is_subsystem = 1; |
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226 break; |
64 | 227 #ifdef ENABLE_CLI_LOCALTCPFWD |
228 case 'L': | |
229 nextislocal = 1; | |
230 break; | |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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231 case 'g': |
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232 opts.listen_fwd_all = 1; |
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233 break; |
64 | 234 #endif |
235 #ifdef ENABLE_CLI_REMOTETCPFWD | |
236 case 'R': | |
237 nextisremote = 1; | |
238 break; | |
239 #endif | |
485
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240 #ifdef ENABLE_CLI_NETCAT |
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241 case 'B': |
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242 nextisnetcat = 1; |
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243 break; |
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244 #endif |
479
e3db1f7a2e43
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245 #ifdef ENABLE_CLI_PROXYCMD |
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246 case 'J': |
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247 next = &cli_opts.proxycmd; |
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248 break; |
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249 #endif |
66
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250 case 'l': |
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251 next = &cli_opts.username; |
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252 break; |
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253 case 'h': |
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|
254 printhelp(); |
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255 exit(EXIT_SUCCESS); |
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|
256 break; |
442
d82a2a44c684
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418
diff
changeset
|
257 case 'u': |
446
2cd2edfa11ee
Just use /dev/urandom since that's what everyone ends up using anyway.
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442
diff
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|
258 /* backwards compatibility with old urandom option */ |
442
d82a2a44c684
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diff
changeset
|
259 break; |
449
3e6c536bc023
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|
260 case 'W': |
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|
261 next = &recv_window_arg; |
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|
262 break; |
454
7e43f5e473b9
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|
263 case 'K': |
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changeset
|
264 next = &keepalive_arg; |
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|
265 break; |
513
a3748e54273c
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509
diff
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|
266 case 'I': |
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|
267 next = &idle_timeout_arg; |
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268 break; |
94
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diff
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|
269 #ifdef DEBUG_TRACE |
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diff
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|
270 case 'v': |
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|
271 debug_trace = 1; |
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|
272 break; |
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|
273 #endif |
66
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274 case 'F': |
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275 case 'e': |
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276 case 'c': |
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|
277 case 'm': |
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278 case 'D': |
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|
279 #ifndef ENABLE_CLI_REMOTETCPFWD |
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280 case 'R': |
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|
281 #endif |
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282 #ifndef ENABLE_CLI_LOCALTCPFWD |
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283 case 'L': |
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|
284 #endif |
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|
285 case 'o': |
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|
286 case 'b': |
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|
287 next = &dummy; |
39
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288 default: |
66
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|
289 fprintf(stderr, |
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290 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
39
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291 break; |
46
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diff
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|
292 } /* Switch */ |
105 | 293 |
294 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
295 if (next && strlen(argv[i]) > 2) { | |
296 *next = &argv[i][2]; | |
297 next = NULL; | |
298 } | |
46
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299 |
47 | 300 continue; /* next argument */ |
301 | |
46
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302 } else { |
165
0cfba3034be5
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134
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|
303 TRACE(("non-flag arg: '%s'", argv[i])) |
46
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|
304 |
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|
305 /* Either the hostname or commands */ |
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|
306 |
3bea78e1b175
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diff
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|
307 if (cli_opts.remotehost == NULL) { |
489
79c657a673ec
- Allow specifying a port with host/port.
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487
diff
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308 #ifdef ENABLE_CLI_MULTIHOP |
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309 parse_multihop_hostname(argv[i], argv[0]); |
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310 #else |
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311 parse_hostname(argv[i]); |
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312 #endif |
47 | 313 } else { |
46
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314 |
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315 /* this is part of the commands to send - after this we |
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316 * don't parse any more options, and flags are sent as the |
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317 * command */ |
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318 cmdlen = 0; |
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319 for (j = i; j < (unsigned int)argc; j++) { |
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320 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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321 } |
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322 /* Allocate the space */ |
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323 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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324 cli_opts.cmd[0] = '\0'; |
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325 |
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326 /* Append all the bits */ |
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327 for (j = i; j < (unsigned int)argc; j++) { |
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328 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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329 strlcat(cli_opts.cmd, " ", cmdlen); |
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330 } |
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331 /* It'll be null-terminated here */ |
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332 |
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333 /* We've eaten all the options and flags */ |
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334 break; |
39
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335 } |
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336 } |
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337 } |
47 | 338 |
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339 /* And now a few sanity checks and setup */ |
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340 |
47 | 341 if (cli_opts.remotehost == NULL) { |
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342 printhelp(); |
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343 exit(EXIT_FAILURE); |
47 | 344 } |
345 | |
346 if (cli_opts.remoteport == NULL) { | |
347 cli_opts.remoteport = "22"; | |
348 } | |
349 | |
350 /* If not explicitly specified with -t or -T, we don't want a pty if | |
351 * there's a command, but we do otherwise */ | |
352 if (cli_opts.wantpty == 9) { | |
353 if (cli_opts.cmd == NULL) { | |
354 cli_opts.wantpty = 1; | |
355 } else { | |
356 cli_opts.wantpty = 0; | |
357 } | |
358 } | |
326
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359 |
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360 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
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361 && cli_opts.no_cmd == 0) { |
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362 dropbear_exit("command required for -f"); |
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363 } |
449
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364 |
483
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365 if (recv_window_arg) { |
449
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366 opts.recv_window = atol(recv_window_arg); |
483
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367 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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368 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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369 } |
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370 } |
454
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371 if (keepalive_arg) { |
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372 if (m_str_to_uint(keepalive_arg, &opts.keepalive_secs) == DROPBEAR_FAILURE) { |
454
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373 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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374 } |
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375 } |
487
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376 |
513
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377 if (idle_timeout_arg) { |
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378 if (m_str_to_uint(idle_timeout_arg, &opts.idle_timeout_secs) == DROPBEAR_FAILURE) { |
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379 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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380 } |
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381 } |
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382 |
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383 #ifdef ENABLE_CLI_NETCAT |
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384 if (cli_opts.cmd && cli_opts.netcat_host) { |
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385 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
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386 } |
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387 #endif |
454
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388 |
39
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389 } |
47 | 390 |
68
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391 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 392 static void loadidentityfile(const char* filename) { |
393 | |
215
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394 struct SignKeyList * nextkey; |
47 | 395 sign_key *key; |
396 int keytype; | |
397 | |
398 key = new_sign_key(); | |
399 keytype = DROPBEAR_SIGNKEY_ANY; | |
400 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
401 | |
402 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
403 sign_key_free(key); | |
404 | |
405 } else { | |
406 | |
215
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407 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
47 | 408 nextkey->key = key; |
215
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409 nextkey->next = cli_opts.privkeys; |
47 | 410 nextkey->type = keytype; |
215
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411 cli_opts.privkeys = nextkey; |
47 | 412 } |
413 } | |
414 #endif | |
415 | |
487
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416 #ifdef ENABLE_CLI_MULTIHOP |
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417 |
489
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418 /* Sets up 'onion-forwarding' connections. This will spawn |
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419 * a separate dbclient process for each hop. |
487
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420 * As an example, if the cmdline is |
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421 * dbclient wrt,madako,canyons |
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422 * then we want to run: |
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423 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
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424 * and then the inner dbclient will recursively run: |
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425 * dbclient -J "dbclient -B madako:22 wrt" madako |
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426 * etc for as many hosts as we want. |
489
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427 * |
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428 * Ports for hosts can be specified as host/port. |
487
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429 */ |
489
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430 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
487
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431 char *userhostarg = NULL; |
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432 char *last_hop = NULL;; |
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433 char *remainder = NULL; |
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434 |
494
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435 /* both scp and rsync parse a user@host argument |
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436 * and turn it into "-l user host". This breaks |
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437 * for our multihop syntax, so we suture it back together. |
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438 * This will break usernames that have both '@' and ',' in them, |
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439 * though that should be fairly uncommon. */ |
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440 if (cli_opts.username |
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441 && strchr(cli_opts.username, ',') |
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442 && strchr(cli_opts.username, '@')) { |
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443 unsigned int len = strlen(orighostarg) + strlen(cli_opts.username) + 2; |
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444 userhostarg = m_malloc(len); |
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445 snprintf(userhostarg, len, "%s@%s", cli_opts.username, orighostarg); |
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446 } else { |
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447 userhostarg = m_strdup(orighostarg); |
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448 } |
487
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449 |
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450 last_hop = strrchr(userhostarg, ','); |
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451 if (last_hop) { |
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452 if (last_hop == userhostarg) { |
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453 dropbear_exit("Bad multi-hop hostnames"); |
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|
454 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
455 *last_hop = '\0'; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
456 last_hop++; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
457 remainder = userhostarg; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
458 userhostarg = last_hop; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
459 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
460 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
461 parse_hostname(userhostarg); |
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
462 |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
463 if (last_hop) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
464 /* Set up the proxycmd */ |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
465 unsigned int cmd_len = 0; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
466 if (cli_opts.proxycmd) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
467 dropbear_exit("-J can't be used with multihop mode"); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
468 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
469 if (cli_opts.remoteport == NULL) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
470 cli_opts.remoteport = "22"; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
471 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
472 cmd_len = strlen(remainder) |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
473 + strlen(cli_opts.remotehost) + strlen(cli_opts.remoteport) |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
474 + strlen(argv0) + 30; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
475 cli_opts.proxycmd = m_malloc(cmd_len); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
476 snprintf(cli_opts.proxycmd, cmd_len, "%s -B %s:%s %s", |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
477 argv0, cli_opts.remotehost, cli_opts.remoteport, remainder); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
478 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
479 } |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
480 #endif /* !ENABLE_CLI_MULTIHOP */ |
47 | 481 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
482 /* Parses a [user@]hostname[/port] argument. */ |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
483 static void parse_hostname(const char* orighostarg) { |
64 | 484 char *userhostarg = NULL; |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
485 char *port = NULL; |
64 | 486 |
487 userhostarg = m_strdup(orighostarg); | |
47 | 488 |
489 cli_opts.remotehost = strchr(userhostarg, '@'); | |
490 if (cli_opts.remotehost == NULL) { | |
491 /* no username portion, the cli-auth.c code can figure the | |
492 * local user's name */ | |
493 cli_opts.remotehost = userhostarg; | |
494 } else { | |
495 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
496 cli_opts.remotehost++; | |
497 cli_opts.username = userhostarg; | |
498 } | |
499 | |
500 if (cli_opts.username == NULL) { | |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
501 cli_opts.username = m_strdup(cli_opts.own_user); |
47 | 502 } |
503 | |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
504 port = strchr(cli_opts.remotehost, '/'); |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
505 if (port) { |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
506 *port = '\0'; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
507 cli_opts.remoteport = port+1; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
508 } |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
509 |
47 | 510 if (cli_opts.remotehost[0] == '\0') { |
511 dropbear_exit("Bad hostname"); | |
512 } | |
513 } | |
64 | 514 |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
515 #ifdef ENABLE_CLI_NETCAT |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
516 static void add_netcat(const char* origstr) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
517 char *portstr = NULL; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
518 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
519 char * str = m_strdup(origstr); |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
520 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
521 portstr = strchr(str, ':'); |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
522 if (portstr == NULL) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
523 TRACE(("No netcat port")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
524 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
525 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
526 *portstr = '\0'; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
527 portstr++; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
528 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
529 if (strchr(portstr, ':')) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
530 TRACE(("Multiple netcat colons")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
531 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
532 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
533 |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
534 if (m_str_to_uint(portstr, &cli_opts.netcat_port) == DROPBEAR_FAILURE) { |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
535 TRACE(("bad netcat port")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
536 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
537 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
538 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
539 if (cli_opts.netcat_port > 65535) { |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
540 TRACE(("too large netcat port")) |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
541 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
542 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
543 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
544 cli_opts.netcat_host = str; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
545 return; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
546 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
547 fail: |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
548 dropbear_exit("Bad netcat endpoint '%s'", origstr); |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
549 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
550 #endif |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
551 |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
552 static void fill_own_user() { |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
553 uid_t uid; |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
554 struct passwd *pw = NULL; |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
555 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
556 uid = getuid(); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
557 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
558 pw = getpwuid(uid); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
559 if (pw == NULL || pw->pw_name == NULL) { |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
560 dropbear_exit("Unknown own user"); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
561 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
562 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
563 cli_opts.own_user = m_strdup(pw->pw_name); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
564 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
565 |
64 | 566 #ifdef ENABLE_CLI_ANYTCPFWD |
567 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
568 * set, and add it to the forwarding list */ | |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
569 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
64 | 570 |
571 char * listenport = NULL; | |
572 char * connectport = NULL; | |
573 char * connectaddr = NULL; | |
574 struct TCPFwdList* newfwd = NULL; | |
575 char * str = NULL; | |
576 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
577 TRACE(("enter addforward")) |
64 | 578 |
411
253958302381
Revert bogus fix, make a note that the var is meant to 'leak'
Matt Johnston <matt@ucc.asn.au>
parents:
407
diff
changeset
|
579 /* We need to split the original argument up. This var |
253958302381
Revert bogus fix, make a note that the var is meant to 'leak'
Matt Johnston <matt@ucc.asn.au>
parents:
407
diff
changeset
|
580 is never free()d. */ |
64 | 581 str = m_strdup(origstr); |
582 | |
583 listenport = str; | |
584 | |
585 connectaddr = strchr(str, ':'); | |
586 if (connectaddr == NULL) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
587 TRACE(("connectaddr == NULL")) |
64 | 588 goto fail; |
589 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
590 *connectaddr = '\0'; |
64 | 591 connectaddr++; |
592 | |
593 connectport = strchr(connectaddr, ':'); | |
594 if (connectport == NULL) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
595 TRACE(("connectport == NULL")) |
64 | 596 goto fail; |
597 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
598 *connectport = '\0'; |
64 | 599 connectport++; |
600 | |
601 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
602 | |
603 /* Now we check the ports - note that the port ints are unsigned, | |
604 * the check later only checks for >= MAX_PORT */ | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
605 if (m_str_to_uint(listenport, &newfwd->listenport) == DROPBEAR_FAILURE) { |
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
606 TRACE(("bad listenport strtoul")) |
64 | 607 goto fail; |
608 } | |
609 | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
610 if (m_str_to_uint(connectport, &newfwd->connectport) == DROPBEAR_FAILURE) { |
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
611 TRACE(("bad connectport strtoul")) |
64 | 612 goto fail; |
613 } | |
614 | |
615 newfwd->connectaddr = connectaddr; | |
616 | |
617 if (newfwd->listenport > 65535) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
618 TRACE(("listenport > 65535")) |
64 | 619 goto badport; |
620 } | |
621 | |
622 if (newfwd->connectport > 65535) { | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
623 TRACE(("connectport > 65535")) |
64 | 624 goto badport; |
625 } | |
626 | |
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
497
diff
changeset
|
627 newfwd->have_reply = 0; |
64 | 628 newfwd->next = *fwdlist; |
629 *fwdlist = newfwd; | |
630 | |
165
0cfba3034be5
Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents:
134
diff
changeset
|
631 TRACE(("leave addforward: done")) |
64 | 632 return; |
633 | |
634 fail: | |
635 dropbear_exit("Bad TCP forward '%s'", origstr); | |
636 | |
637 badport: | |
638 dropbear_exit("Bad TCP port in '%s'", origstr); | |
639 } | |
640 #endif |