Mercurial > dropbear
annotate cli-runopts.c @ 545:00e619aa2f9a
- Print banner to stderr. Probably the right way, and avoids
bad interactions with multihop or netcat-alike mode.
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 16 Jun 2009 15:22:33 +0000 |
| parents | 9e51707cd6f2 |
| children | 568638be7203 |
| 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" |
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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" |
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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 unsigned int i, j; |
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95 char ** next = 0; |
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96 unsigned int cmdlen; |
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97 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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98 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
| 47 | 99 #endif |
| 64 | 100 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 62 | 101 int nextislocal = 0; |
| 102 #endif | |
| 64 | 103 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 104 int nextisremote = 0; |
| 105 #endif | |
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106 #ifdef ENABLE_CLI_NETCAT |
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107 int nextisnetcat = 0; |
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108 #endif |
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109 char* dummy = NULL; /* Not used for anything real */ |
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110 |
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111 char* recv_window_arg = NULL; |
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112 char* keepalive_arg = NULL; |
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113 char* idle_timeout_arg = NULL; |
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114 char *host_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; |
|
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145 |
|
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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 |
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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; | |
|
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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 | |
|
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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* */ |
|
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194 |
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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 */ |
|
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200 next = &cli_opts.remoteport; |
|
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201 break; |
|
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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 } | |
|
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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
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diff
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|
221 case 'f': |
|
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|
222 cli_opts.backgrounded = 1; |
|
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|
223 break; |
|
497
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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
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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 | |
|
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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
- Split main socket var into ses.sock_in/ses.sock_out in preparation
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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
Add -u option to specify /dev/urandom instead
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418
diff
changeset
|
257 case 'u': |
|
446
2cd2edfa11ee
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442
diff
changeset
|
258 /* backwards compatibility with old urandom option */ |
|
442
d82a2a44c684
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|
259 break; |
|
449
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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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changeset
|
263 case 'K': |
|
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changeset
|
264 next = &keepalive_arg; |
|
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|
265 break; |
|
513
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diff
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|
266 case 'I': |
|
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changeset
|
267 next = &idle_timeout_arg; |
|
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|
268 break; |
|
94
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|
269 #ifdef DEBUG_TRACE |
|
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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; |
|
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|
288 default: |
|
66
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|
289 fprintf(stderr, |
|
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diff
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290 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
|
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291 break; |
|
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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 } | |
|
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299 |
| 47 | 300 continue; /* next argument */ |
| 301 | |
|
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302 } else { |
|
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303 TRACE(("non-flag arg: '%s'", argv[i])) |
|
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304 |
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305 /* Either the hostname or commands */ |
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306 |
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307 if (host_arg == NULL) { |
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308 host_arg = argv[i]; |
| 47 | 309 } else { |
|
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310 |
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311 /* this is part of the commands to send - after this we |
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312 * don't parse any more options, and flags are sent as the |
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313 * command */ |
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314 cmdlen = 0; |
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315 for (j = i; j < (unsigned int)argc; j++) { |
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316 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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317 } |
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318 /* Allocate the space */ |
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319 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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320 cli_opts.cmd[0] = '\0'; |
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321 |
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322 /* Append all the bits */ |
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323 for (j = i; j < (unsigned int)argc; j++) { |
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324 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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325 strlcat(cli_opts.cmd, " ", cmdlen); |
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326 } |
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327 /* It'll be null-terminated here */ |
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328 |
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329 /* We've eaten all the options and flags */ |
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330 break; |
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331 } |
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332 } |
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333 } |
| 47 | 334 |
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335 /* And now a few sanity checks and setup */ |
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336 |
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337 if (host_arg == NULL) { |
|
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338 printhelp(); |
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339 exit(EXIT_FAILURE); |
| 47 | 340 } |
| 341 | |
| 342 if (cli_opts.remoteport == NULL) { | |
| 343 cli_opts.remoteport = "22"; | |
| 344 } | |
| 345 | |
| 346 /* If not explicitly specified with -t or -T, we don't want a pty if | |
| 347 * there's a command, but we do otherwise */ | |
| 348 if (cli_opts.wantpty == 9) { | |
| 349 if (cli_opts.cmd == NULL) { | |
| 350 cli_opts.wantpty = 1; | |
| 351 } else { | |
| 352 cli_opts.wantpty = 0; | |
| 353 } | |
| 354 } | |
|
326
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355 |
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356 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
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357 && cli_opts.no_cmd == 0) { |
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358 dropbear_exit("command required for -f"); |
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359 } |
|
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360 |
|
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361 if (recv_window_arg) { |
|
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362 opts.recv_window = atol(recv_window_arg); |
|
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363 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
|
449
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364 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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365 } |
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366 } |
|
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367 if (keepalive_arg) { |
|
492
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368 if (m_str_to_uint(keepalive_arg, &opts.keepalive_secs) == DROPBEAR_FAILURE) { |
|
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369 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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370 } |
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371 } |
|
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372 |
|
513
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373 if (idle_timeout_arg) { |
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374 if (m_str_to_uint(idle_timeout_arg, &opts.idle_timeout_secs) == DROPBEAR_FAILURE) { |
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375 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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376 } |
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377 } |
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378 |
|
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379 #ifdef ENABLE_CLI_NETCAT |
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380 if (cli_opts.cmd && cli_opts.netcat_host) { |
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381 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
|
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382 } |
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383 #endif |
|
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|
384 |
|
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|
385 /* The hostname gets set up last, since |
|
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386 * in multi-hop mode it will require knowledge |
|
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387 * of other flags such as -i */ |
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388 #ifdef ENABLE_CLI_MULTIHOP |
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389 parse_multihop_hostname(host_arg, argv[0]); |
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390 #else |
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|
391 parse_hostname(host_arg); |
|
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392 #endif |
|
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393 } |
| 47 | 394 |
|
68
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changeset
|
395 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 396 static void loadidentityfile(const char* filename) { |
| 397 | |
|
215
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|
398 struct SignKeyList * nextkey; |
| 47 | 399 sign_key *key; |
| 400 int keytype; | |
| 401 | |
| 402 key = new_sign_key(); | |
| 403 keytype = DROPBEAR_SIGNKEY_ANY; | |
| 404 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
| 405 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
| 406 sign_key_free(key); | |
| 407 } else { | |
|
215
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408 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
| 47 | 409 nextkey->key = key; |
|
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|
410 nextkey->filename = m_strdup(filename); |
|
215
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411 nextkey->next = cli_opts.privkeys; |
| 47 | 412 nextkey->type = keytype; |
|
215
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|
413 cli_opts.privkeys = nextkey; |
| 47 | 414 } |
| 415 } | |
| 416 #endif | |
| 417 | |
|
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418 #ifdef ENABLE_CLI_MULTIHOP |
|
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419 |
|
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420 static char* |
|
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|
421 multihop_passthrough_args() { |
|
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|
422 char *ret; |
|
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|
423 int total; |
|
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|
424 unsigned int len = 0; |
|
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|
425 struct SignKeyList *nextkey; |
|
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426 /* Fill out -i and -W options that make sense for all |
|
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427 * the intermediate processes */ |
|
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|
428 for (nextkey = cli_opts.privkeys; nextkey; nextkey = nextkey->next) |
|
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|
429 { |
|
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|
430 len += 3 + strlen(nextkey->filename); |
|
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431 } |
|
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432 len += 20; // space for -W <size>, terminator. |
|
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|
433 ret = m_malloc(len); |
|
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|
434 total = 0; |
|
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|
435 |
|
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|
436 if (opts.recv_window != DEFAULT_RECV_WINDOW) |
|
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|
437 { |
|
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438 int written = snprintf(ret+total, len-total, "-W %d", opts.recv_window); |
|
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439 total += written; |
|
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440 } |
|
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441 |
|
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442 for (nextkey = cli_opts.privkeys; nextkey; nextkey = nextkey->next) |
|
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443 { |
|
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|
444 const size_t size = len - total; |
|
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445 int written = snprintf(ret+total, size, "-i %s", nextkey->filename); |
|
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446 dropbear_assert(written < size); |
|
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447 total += written; |
|
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448 } |
|
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|
449 |
|
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450 return ret; |
|
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451 } |
|
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|
452 |
|
489
79c657a673ec
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changeset
|
453 /* Sets up 'onion-forwarding' connections. This will spawn |
|
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|
454 * a separate dbclient process for each hop. |
|
487
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455 * As an example, if the cmdline is |
|
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|
456 * dbclient wrt,madako,canyons |
|
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457 * then we want to run: |
|
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458 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
|
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459 * and then the inner dbclient will recursively run: |
|
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460 * dbclient -J "dbclient -B madako:22 wrt" madako |
|
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461 * etc for as many hosts as we want. |
|
489
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|
462 * |
|
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463 * Ports for hosts can be specified as host/port. |
|
487
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464 */ |
|
489
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|
465 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
|
487
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466 char *userhostarg = NULL; |
|
544
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467 char *hostbuf = NULL; |
|
487
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468 char *last_hop = NULL;; |
|
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469 char *remainder = NULL; |
|
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470 |
|
494
66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
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|
471 /* both scp and rsync parse a user@host argument |
|
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|
472 * and turn it into "-l user host". This breaks |
|
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473 * for our multihop syntax, so we suture it back together. |
|
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474 * This will break usernames that have both '@' and ',' in them, |
|
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475 * though that should be fairly uncommon. */ |
|
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|
476 if (cli_opts.username |
|
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477 && strchr(cli_opts.username, ',') |
|
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478 && strchr(cli_opts.username, '@')) { |
|
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|
479 unsigned int len = strlen(orighostarg) + strlen(cli_opts.username) + 2; |
|
544
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480 hostbuf = m_malloc(len); |
|
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481 snprintf(hostbuf, len, "%s@%s", cli_opts.username, orighostarg); |
|
494
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482 } else { |
|
544
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|
483 hostbuf = m_strdup(orighostarg); |
|
494
66eac4631d88
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|
484 } |
|
544
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|
485 userhostarg = hostbuf; |
|
487
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|
486 |
|
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|
487 last_hop = strrchr(userhostarg, ','); |
|
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488 if (last_hop) { |
|
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|
489 if (last_hop == userhostarg) { |
|
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|
490 dropbear_exit("Bad multi-hop hostnames"); |
|
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491 } |
|
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492 *last_hop = '\0'; |
|
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|
493 last_hop++; |
|
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|
494 remainder = userhostarg; |
|
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|
495 userhostarg = last_hop; |
|
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496 } |
|
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|
497 |
|
489
79c657a673ec
- Allow specifying a port with host/port.
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diff
changeset
|
498 parse_hostname(userhostarg); |
|
487
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|
499 |
|
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|
500 if (last_hop) { |
|
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|
501 /* Set up the proxycmd */ |
|
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changeset
|
502 unsigned int cmd_len = 0; |
|
544
9e51707cd6f2
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changeset
|
503 char *passthrough_args = multihop_passthrough_args(); |
|
487
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|
504 if (cli_opts.proxycmd) { |
|
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|
505 dropbear_exit("-J can't be used with multihop mode"); |
|
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|
506 } |
|
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|
507 if (cli_opts.remoteport == NULL) { |
|
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changeset
|
508 cli_opts.remoteport = "22"; |
|
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|
509 } |
|
544
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|
510 cmd_len = strlen(argv0) + strlen(remainder) |
|
487
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diff
changeset
|
511 + strlen(cli_opts.remotehost) + strlen(cli_opts.remoteport) |
|
544
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|
512 + strlen(passthrough_args) |
|
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- Make -i and -W pass through multihop arguments
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diff
changeset
|
513 + 30; |
|
487
2e17f82a7330
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diff
changeset
|
514 cli_opts.proxycmd = m_malloc(cmd_len); |
|
544
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changeset
|
515 snprintf(cli_opts.proxycmd, cmd_len, "%s -B %s:%s %s %s", |
|
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|
516 argv0, cli_opts.remotehost, cli_opts.remoteport, |
|
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|
517 passthrough_args, remainder); |
|
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|
518 m_free(passthrough_args); |
|
487
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|
519 } |
|
544
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|
520 m_free(hostbuf); |
|
487
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diff
changeset
|
521 } |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
522 #endif /* !ENABLE_CLI_MULTIHOP */ |
| 47 | 523 |
|
489
79c657a673ec
- Allow specifying a port with host/port.
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487
diff
changeset
|
524 /* Parses a [user@]hostname[/port] argument. */ |
|
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Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
525 static void parse_hostname(const char* orighostarg) { |
| 64 | 526 char *userhostarg = NULL; |
|
489
79c657a673ec
- Allow specifying a port with host/port.
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diff
changeset
|
527 char *port = NULL; |
| 64 | 528 |
| 529 userhostarg = m_strdup(orighostarg); | |
| 47 | 530 |
| 531 cli_opts.remotehost = strchr(userhostarg, '@'); | |
| 532 if (cli_opts.remotehost == NULL) { | |
| 533 /* no username portion, the cli-auth.c code can figure the | |
| 534 * local user's name */ | |
| 535 cli_opts.remotehost = userhostarg; | |
| 536 } else { | |
| 537 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
| 538 cli_opts.remotehost++; | |
| 539 cli_opts.username = userhostarg; | |
| 540 } | |
| 541 | |
| 542 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
|
543 cli_opts.username = m_strdup(cli_opts.own_user); |
| 47 | 544 } |
| 545 | |
|
489
79c657a673ec
- Allow specifying a port with host/port.
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487
diff
changeset
|
546 port = strchr(cli_opts.remotehost, '/'); |
|
79c657a673ec
- Allow specifying a port with host/port.
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parents:
487
diff
changeset
|
547 if (port) { |
|
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- Allow specifying a port with host/port.
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parents:
487
diff
changeset
|
548 *port = '\0'; |
|
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diff
changeset
|
549 cli_opts.remoteport = port+1; |
|
79c657a673ec
- Allow specifying a port with host/port.
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parents:
487
diff
changeset
|
550 } |
|
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diff
changeset
|
551 |
| 47 | 552 if (cli_opts.remotehost[0] == '\0') { |
| 553 dropbear_exit("Bad hostname"); | |
| 554 } | |
| 555 } | |
| 64 | 556 |
|
485
12d845ab7b5f
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Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
557 #ifdef ENABLE_CLI_NETCAT |
|
12d845ab7b5f
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Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
558 static void add_netcat(const char* origstr) { |
|
12d845ab7b5f
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Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
559 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
|
560 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
561 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
|
562 |
|
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Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
563 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
|
564 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
|
565 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
|
566 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
567 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
568 *portstr = '\0'; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
569 portstr++; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
570 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
571 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
|
572 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
|
573 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
574 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
575 |
|
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
576 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
|
577 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
|
578 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
579 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
580 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
581 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
|
582 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
|
583 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
584 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
585 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
586 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
|
587 return; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
588 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
589 fail: |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
590 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
|
591 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
592 #endif |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
593 |
|
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
594 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
|
595 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
|
596 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
|
597 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
598 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
|
599 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
600 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
|
601 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
|
602 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
|
603 } |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
604 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
605 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
|
606 } |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
607 |
| 64 | 608 #ifdef ENABLE_CLI_ANYTCPFWD |
| 609 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
| 610 * 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
|
611 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
| 64 | 612 |
| 613 char * listenport = NULL; | |
| 614 char * connectport = NULL; | |
| 615 char * connectaddr = NULL; | |
| 616 struct TCPFwdList* newfwd = NULL; | |
| 617 char * str = NULL; | |
| 618 | |
|
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
|
619 TRACE(("enter addforward")) |
| 64 | 620 |
|
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
|
621 /* 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
|
622 is never free()d. */ |
| 64 | 623 str = m_strdup(origstr); |
| 624 | |
| 625 listenport = str; | |
| 626 | |
| 627 connectaddr = strchr(str, ':'); | |
| 628 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
|
629 TRACE(("connectaddr == NULL")) |
| 64 | 630 goto fail; |
| 631 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
632 *connectaddr = '\0'; |
| 64 | 633 connectaddr++; |
| 634 | |
| 635 connectport = strchr(connectaddr, ':'); | |
| 636 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
|
637 TRACE(("connectport == NULL")) |
| 64 | 638 goto fail; |
| 639 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
640 *connectport = '\0'; |
| 64 | 641 connectport++; |
| 642 | |
| 643 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
| 644 | |
| 645 /* Now we check the ports - note that the port ints are unsigned, | |
| 646 * 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
|
647 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
|
648 TRACE(("bad listenport strtoul")) |
| 64 | 649 goto fail; |
| 650 } | |
| 651 | |
|
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
652 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
|
653 TRACE(("bad connectport strtoul")) |
| 64 | 654 goto fail; |
| 655 } | |
| 656 | |
| 657 newfwd->connectaddr = connectaddr; | |
| 658 | |
| 659 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
|
660 TRACE(("listenport > 65535")) |
| 64 | 661 goto badport; |
| 662 } | |
| 663 | |
| 664 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
|
665 TRACE(("connectport > 65535")) |
| 64 | 666 goto badport; |
| 667 } | |
| 668 | |
|
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
497
diff
changeset
|
669 newfwd->have_reply = 0; |
| 64 | 670 newfwd->next = *fwdlist; |
| 671 *fwdlist = newfwd; | |
| 672 | |
|
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
|
673 TRACE(("leave addforward: done")) |
| 64 | 674 return; |
| 675 | |
| 676 fail: | |
| 677 dropbear_exit("Bad TCP forward '%s'", origstr); | |
| 678 | |
| 679 badport: | |
| 680 dropbear_exit("Bad TCP port in '%s'", origstr); | |
| 681 } | |
| 682 #endif |