Mercurial > dropbear
annotate cli-runopts.c @ 508:d4bbc0039008
- Set a default path, since bash won't export one otherwise (though it will set
one, leading to mysterious problems)
- Rearrange some options
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 05 Nov 2008 13:30:23 +0000 |
| parents | 805e557fdff7 |
| children | 4e251543b941 |
| 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 "Usage: %s [options] [user@]host[/port] [command]\n" |
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53 "Options are:\n" |
| 47 | 54 "-p <remoteport>\n" |
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55 "-l <username>\n" |
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56
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56 "-t Allocate a pty\n" |
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57 "-T Don't allocate a pty\n" |
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58 "-N Don't run a remote command\n" |
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59 "-f Run in background after auth\n" |
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60 "-y Always accept remote host key if unknown\n" |
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61 "-s Request a subsystem (use for sftp)\n" |
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62 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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63 "-i <identityfile> (multiple allowed)\n" |
| 47 | 64 #endif |
| 64 | 65 #ifdef ENABLE_CLI_LOCALTCPFWD |
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66 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
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67 "-g Allow remote hosts to connect to forwarded ports\n" |
| 62 | 68 #endif |
| 64 | 69 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 70 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
| 71 #endif | |
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72 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
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73 "-K <keepalive> (0 is never, default %d)\n" |
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74 #ifdef ENABLE_CLI_NETCAT |
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75 "-B <endhost:endport> Netcat-alike bouncing\n" |
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76 #endif |
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77 #ifdef ENABLE_CLI_PROXYCMD |
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78 "-J <proxy_program> Use program rather than tcp connection\n" |
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79 #endif |
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80 #ifdef DEBUG_TRACE |
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81 "-v verbose\n" |
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82 #endif |
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83 ,DROPBEAR_VERSION, cli_opts.progname, |
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84 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE); |
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85 |
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86 } |
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87 |
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88 void cli_getopts(int argc, char ** argv) { |
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89 |
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90 unsigned int i, j; |
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91 char ** next = 0; |
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92 unsigned int cmdlen; |
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93 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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94 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
| 47 | 95 #endif |
| 64 | 96 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 62 | 97 int nextislocal = 0; |
| 98 #endif | |
| 64 | 99 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 100 int nextisremote = 0; |
| 101 #endif | |
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102 #ifdef ENABLE_CLI_NETCAT |
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103 int nextisnetcat = 0; |
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104 #endif |
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105 char* dummy = NULL; /* Not used for anything real */ |
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106 |
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107 char* recv_window_arg = NULL; |
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108 char* keepalive_arg = NULL; |
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109 |
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110 /* see printhelp() for options */ |
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111 cli_opts.progname = argv[0]; |
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112 cli_opts.remotehost = NULL; |
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113 cli_opts.remoteport = NULL; |
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114 cli_opts.username = NULL; |
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115 cli_opts.cmd = NULL; |
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116 cli_opts.no_cmd = 0; |
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117 cli_opts.backgrounded = 0; |
| 47 | 118 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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119 cli_opts.always_accept_key = 0; |
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120 cli_opts.is_subsystem = 0; |
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121 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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122 cli_opts.privkeys = NULL; |
| 47 | 123 #endif |
| 64 | 124 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 125 cli_opts.localfwds = NULL; | |
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126 opts.listen_fwd_all = 0; |
| 62 | 127 #endif |
| 64 | 128 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 129 cli_opts.remotefwds = NULL; | |
| 62 | 130 #endif |
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131 #ifdef ENABLE_CLI_PROXYCMD |
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132 cli_opts.proxycmd = NULL; |
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133 #endif |
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134 /* not yet |
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135 opts.ipv4 = 1; |
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136 opts.ipv6 = 1; |
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137 */ |
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138 opts.recv_window = DEFAULT_RECV_WINDOW; |
|
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139 |
|
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140 fill_own_user(); |
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141 |
| 47 | 142 /* Iterate all the arguments */ |
|
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143 for (i = 1; i < (unsigned int)argc; i++) { |
|
68
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144 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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145 if (nextiskey) { |
| 47 | 146 /* Load a hostkey since the previous argument was "-i" */ |
| 147 loadidentityfile(argv[i]); | |
| 148 nextiskey = 0; | |
| 149 continue; | |
|
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150 } |
| 47 | 151 #endif |
| 64 | 152 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 153 if (nextisremote) { | |
|
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154 TRACE(("nextisremote true")) |
| 64 | 155 addforward(argv[i], &cli_opts.remotefwds); |
| 156 nextisremote = 0; | |
| 157 continue; | |
| 158 } | |
| 159 #endif | |
| 160 #ifdef ENABLE_CLI_LOCALTCPFWD | |
| 161 if (nextislocal) { | |
|
165
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162 TRACE(("nextislocal true")) |
| 64 | 163 addforward(argv[i], &cli_opts.localfwds); |
| 164 nextislocal = 0; | |
| 165 continue; | |
| 166 } | |
| 167 #endif | |
|
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168 #ifdef ENABLE_CLI_NETCAT |
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169 if (nextisnetcat) { |
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170 TRACE(("nextisnetcat true")) |
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171 add_netcat(argv[i]); |
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172 nextisnetcat = 0; |
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173 continue; |
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174 } |
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175 #endif |
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176 if (next) { |
| 47 | 177 /* The previous flag set a value to assign */ |
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178 *next = argv[i]; |
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179 if (*next == NULL) { |
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180 dropbear_exit("Invalid null argument"); |
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181 } |
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182 next = NULL; |
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183 continue; |
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184 } |
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185 |
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186 if (argv[i][0] == '-') { |
| 47 | 187 /* A flag *waves* */ |
|
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188 |
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189 switch (argv[i][1]) { |
|
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190 case 'y': /* always accept the remote hostkey */ |
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191 cli_opts.always_accept_key = 1; |
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192 break; |
| 47 | 193 case 'p': /* remoteport */ |
|
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194 next = &cli_opts.remoteport; |
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195 break; |
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196 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 197 case 'i': /* an identityfile */ |
| 134 | 198 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
| 199 if (strlen(argv[i]) > 2) { | |
| 200 loadidentityfile(&argv[i][2]); | |
| 201 } else { | |
| 202 nextiskey = 1; | |
| 203 } | |
|
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204 break; |
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205 #endif |
| 47 | 206 case 't': /* we want a pty */ |
| 207 cli_opts.wantpty = 1; | |
| 208 break; | |
| 209 case 'T': /* don't want a pty */ | |
| 210 cli_opts.wantpty = 0; | |
| 211 break; | |
|
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212 case 'N': |
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213 cli_opts.no_cmd = 1; |
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214 break; |
|
326
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215 case 'f': |
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216 cli_opts.backgrounded = 1; |
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217 break; |
|
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218 case 's': |
|
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219 cli_opts.is_subsystem = 1; |
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220 break; |
| 64 | 221 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 222 case 'L': | |
| 223 nextislocal = 1; | |
| 224 break; | |
|
258
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225 case 'g': |
|
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226 opts.listen_fwd_all = 1; |
|
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227 break; |
| 64 | 228 #endif |
| 229 #ifdef ENABLE_CLI_REMOTETCPFWD | |
| 230 case 'R': | |
| 231 nextisremote = 1; | |
| 232 break; | |
| 233 #endif | |
|
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234 #ifdef ENABLE_CLI_NETCAT |
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235 case 'B': |
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236 nextisnetcat = 1; |
|
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237 break; |
|
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238 #endif |
|
479
e3db1f7a2e43
- Split main socket var into ses.sock_in/ses.sock_out in preparation
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|
239 #ifdef ENABLE_CLI_PROXYCMD |
|
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240 case 'J': |
|
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|
241 next = &cli_opts.proxycmd; |
|
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|
242 break; |
|
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|
243 #endif |
|
66
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|
244 case 'l': |
|
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|
245 next = &cli_opts.username; |
|
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|
246 break; |
|
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|
247 case 'h': |
|
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|
248 printhelp(); |
|
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249 exit(EXIT_SUCCESS); |
|
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|
250 break; |
|
442
d82a2a44c684
Add -u option to specify /dev/urandom instead
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diff
changeset
|
251 case 'u': |
|
446
2cd2edfa11ee
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442
diff
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|
252 /* backwards compatibility with old urandom option */ |
|
442
d82a2a44c684
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|
253 break; |
|
449
3e6c536bc023
Add -W <windowsize> argument and document it.
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|
254 case 'W': |
|
3e6c536bc023
Add -W <windowsize> argument and document it.
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|
255 next = &recv_window_arg; |
|
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|
256 break; |
|
454
7e43f5e473b9
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|
257 case 'K': |
|
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|
258 next = &keepalive_arg; |
|
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|
259 break; |
|
94
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|
260 #ifdef DEBUG_TRACE |
|
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261 case 'v': |
|
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|
262 debug_trace = 1; |
|
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|
263 break; |
|
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|
264 #endif |
|
66
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265 case 'F': |
|
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266 case 'e': |
|
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|
267 case 'c': |
|
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|
268 case 'm': |
|
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|
269 case 'D': |
|
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|
270 #ifndef ENABLE_CLI_REMOTETCPFWD |
|
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271 case 'R': |
|
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272 #endif |
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273 #ifndef ENABLE_CLI_LOCALTCPFWD |
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274 case 'L': |
|
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275 #endif |
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|
276 case 'o': |
|
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|
277 case 'b': |
|
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|
278 next = &dummy; |
|
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|
279 default: |
|
66
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|
280 fprintf(stderr, |
|
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281 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
|
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282 break; |
|
46
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|
283 } /* Switch */ |
| 105 | 284 |
| 285 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
| 286 if (next && strlen(argv[i]) > 2) { | |
| 287 *next = &argv[i][2]; | |
| 288 next = NULL; | |
| 289 } | |
|
46
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290 |
| 47 | 291 continue; /* next argument */ |
| 292 | |
|
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|
293 } else { |
|
165
0cfba3034be5
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|
294 TRACE(("non-flag arg: '%s'", argv[i])) |
|
46
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295 |
|
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|
296 /* Either the hostname or commands */ |
|
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|
297 |
|
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298 if (cli_opts.remotehost == NULL) { |
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299 #ifdef ENABLE_CLI_MULTIHOP |
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300 parse_multihop_hostname(argv[i], argv[0]); |
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301 #else |
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302 parse_hostname(argv[i]); |
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303 #endif |
| 47 | 304 } else { |
|
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305 |
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306 /* this is part of the commands to send - after this we |
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307 * don't parse any more options, and flags are sent as the |
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308 * command */ |
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309 cmdlen = 0; |
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310 for (j = i; j < (unsigned int)argc; j++) { |
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311 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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312 } |
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313 /* Allocate the space */ |
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314 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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315 cli_opts.cmd[0] = '\0'; |
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316 |
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317 /* Append all the bits */ |
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318 for (j = i; j < (unsigned int)argc; j++) { |
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319 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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320 strlcat(cli_opts.cmd, " ", cmdlen); |
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321 } |
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322 /* It'll be null-terminated here */ |
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323 |
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324 /* We've eaten all the options and flags */ |
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325 break; |
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326 } |
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327 } |
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328 } |
| 47 | 329 |
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330 /* And now a few sanity checks and setup */ |
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331 |
| 47 | 332 if (cli_opts.remotehost == NULL) { |
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333 printhelp(); |
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334 exit(EXIT_FAILURE); |
| 47 | 335 } |
| 336 | |
| 337 if (cli_opts.remoteport == NULL) { | |
| 338 cli_opts.remoteport = "22"; | |
| 339 } | |
| 340 | |
| 341 /* If not explicitly specified with -t or -T, we don't want a pty if | |
| 342 * there's a command, but we do otherwise */ | |
| 343 if (cli_opts.wantpty == 9) { | |
| 344 if (cli_opts.cmd == NULL) { | |
| 345 cli_opts.wantpty = 1; | |
| 346 } else { | |
| 347 cli_opts.wantpty = 0; | |
| 348 } | |
| 349 } | |
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350 |
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351 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
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352 && cli_opts.no_cmd == 0) { |
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353 dropbear_exit("command required for -f"); |
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354 } |
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355 |
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356 if (recv_window_arg) { |
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357 opts.recv_window = atol(recv_window_arg); |
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358 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
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359 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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360 } |
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361 } |
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362 if (keepalive_arg) { |
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363 if (m_str_to_uint(keepalive_arg, &opts.keepalive_secs) == DROPBEAR_FAILURE) { |
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364 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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365 } |
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366 } |
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367 |
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368 #ifdef ENABLE_CLI_NETCAT |
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369 if (cli_opts.cmd && cli_opts.netcat_host) { |
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370 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
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371 } |
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372 #endif |
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373 |
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374 } |
| 47 | 375 |
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376 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 377 static void loadidentityfile(const char* filename) { |
| 378 | |
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379 struct SignKeyList * nextkey; |
| 47 | 380 sign_key *key; |
| 381 int keytype; | |
| 382 | |
| 383 key = new_sign_key(); | |
| 384 keytype = DROPBEAR_SIGNKEY_ANY; | |
| 385 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
| 386 | |
| 387 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
| 388 sign_key_free(key); | |
| 389 | |
| 390 } else { | |
| 391 | |
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392 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
| 47 | 393 nextkey->key = key; |
|
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394 nextkey->next = cli_opts.privkeys; |
| 47 | 395 nextkey->type = keytype; |
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396 cli_opts.privkeys = nextkey; |
| 47 | 397 } |
| 398 } | |
| 399 #endif | |
| 400 | |
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401 #ifdef ENABLE_CLI_MULTIHOP |
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402 |
|
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403 /* Sets up 'onion-forwarding' connections. This will spawn |
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404 * a separate dbclient process for each hop. |
|
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405 * As an example, if the cmdline is |
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406 * dbclient wrt,madako,canyons |
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407 * then we want to run: |
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408 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
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409 * and then the inner dbclient will recursively run: |
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410 * dbclient -J "dbclient -B madako:22 wrt" madako |
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411 * etc for as many hosts as we want. |
|
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412 * |
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413 * Ports for hosts can be specified as host/port. |
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414 */ |
|
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415 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
|
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416 char *userhostarg = NULL; |
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417 char *last_hop = NULL;; |
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418 char *remainder = NULL; |
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419 |
|
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420 /* both scp and rsync parse a user@host argument |
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421 * and turn it into "-l user host". This breaks |
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422 * for our multihop syntax, so we suture it back together. |
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423 * This will break usernames that have both '@' and ',' in them, |
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424 * though that should be fairly uncommon. */ |
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425 if (cli_opts.username |
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426 && strchr(cli_opts.username, ',') |
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427 && strchr(cli_opts.username, '@')) { |
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428 unsigned int len = strlen(orighostarg) + strlen(cli_opts.username) + 2; |
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429 userhostarg = m_malloc(len); |
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430 snprintf(userhostarg, len, "%s@%s", cli_opts.username, orighostarg); |
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431 } else { |
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432 userhostarg = m_strdup(orighostarg); |
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433 } |
|
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434 |
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435 last_hop = strrchr(userhostarg, ','); |
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436 if (last_hop) { |
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437 if (last_hop == userhostarg) { |
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438 dropbear_exit("Bad multi-hop hostnames"); |
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439 } |
|
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Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
440 *last_hop = '\0'; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
441 last_hop++; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
442 remainder = userhostarg; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
443 userhostarg = last_hop; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
444 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
445 |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
446 parse_hostname(userhostarg); |
|
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
447 |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
448 if (last_hop) { |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
449 /* Set up the proxycmd */ |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
450 unsigned int cmd_len = 0; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
451 if (cli_opts.proxycmd) { |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
452 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
|
453 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
454 if (cli_opts.remoteport == NULL) { |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
455 cli_opts.remoteport = "22"; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
456 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
457 cmd_len = strlen(remainder) |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
458 + 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
|
459 + strlen(argv0) + 30; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
460 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
|
461 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
|
462 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
|
463 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
464 } |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
465 #endif /* !ENABLE_CLI_MULTIHOP */ |
| 47 | 466 |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
467 /* Parses a [user@]hostname[/port] argument. */ |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
468 static void parse_hostname(const char* orighostarg) { |
| 64 | 469 char *userhostarg = NULL; |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
470 char *port = NULL; |
| 64 | 471 |
| 472 userhostarg = m_strdup(orighostarg); | |
| 47 | 473 |
| 474 cli_opts.remotehost = strchr(userhostarg, '@'); | |
| 475 if (cli_opts.remotehost == NULL) { | |
| 476 /* no username portion, the cli-auth.c code can figure the | |
| 477 * local user's name */ | |
| 478 cli_opts.remotehost = userhostarg; | |
| 479 } else { | |
| 480 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
| 481 cli_opts.remotehost++; | |
| 482 cli_opts.username = userhostarg; | |
| 483 } | |
| 484 | |
| 485 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
|
486 cli_opts.username = m_strdup(cli_opts.own_user); |
| 47 | 487 } |
| 488 | |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
489 port = strchr(cli_opts.remotehost, '/'); |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
490 if (port) { |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
491 *port = '\0'; |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
492 cli_opts.remoteport = port+1; |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
493 } |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
494 |
| 47 | 495 if (cli_opts.remotehost[0] == '\0') { |
| 496 dropbear_exit("Bad hostname"); | |
| 497 } | |
| 498 } | |
| 64 | 499 |
|
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
500 #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
|
501 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
|
502 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
|
503 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
504 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
|
505 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
506 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
|
507 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
|
508 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
|
509 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
510 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
511 *portstr = '\0'; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
512 portstr++; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
513 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
514 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
|
515 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
|
516 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
517 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
518 |
|
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
519 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
|
520 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
|
521 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
522 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
523 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
524 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
|
525 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
|
526 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
527 } |
|
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 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
|
530 return; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
531 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
532 fail: |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
533 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
|
534 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
535 #endif |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
536 |
|
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
537 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
|
538 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
|
539 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
|
540 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
541 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
|
542 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
543 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
|
544 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
|
545 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
|
546 } |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
547 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
548 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
|
549 } |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
550 |
| 64 | 551 #ifdef ENABLE_CLI_ANYTCPFWD |
| 552 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
| 553 * 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
|
554 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
| 64 | 555 |
| 556 char * listenport = NULL; | |
| 557 char * connectport = NULL; | |
| 558 char * connectaddr = NULL; | |
| 559 struct TCPFwdList* newfwd = NULL; | |
| 560 char * str = NULL; | |
| 561 | |
|
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
|
562 TRACE(("enter addforward")) |
| 64 | 563 |
|
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
|
564 /* 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
|
565 is never free()d. */ |
| 64 | 566 str = m_strdup(origstr); |
| 567 | |
| 568 listenport = str; | |
| 569 | |
| 570 connectaddr = strchr(str, ':'); | |
| 571 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
|
572 TRACE(("connectaddr == NULL")) |
| 64 | 573 goto fail; |
| 574 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
575 *connectaddr = '\0'; |
| 64 | 576 connectaddr++; |
| 577 | |
| 578 connectport = strchr(connectaddr, ':'); | |
| 579 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
|
580 TRACE(("connectport == NULL")) |
| 64 | 581 goto fail; |
| 582 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
583 *connectport = '\0'; |
| 64 | 584 connectport++; |
| 585 | |
| 586 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
| 587 | |
| 588 /* Now we check the ports - note that the port ints are unsigned, | |
| 589 * 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
|
590 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
|
591 TRACE(("bad listenport strtoul")) |
| 64 | 592 goto fail; |
| 593 } | |
| 594 | |
|
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
595 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
|
596 TRACE(("bad connectport strtoul")) |
| 64 | 597 goto fail; |
| 598 } | |
| 599 | |
| 600 newfwd->connectaddr = connectaddr; | |
| 601 | |
| 602 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
|
603 TRACE(("listenport > 65535")) |
| 64 | 604 goto badport; |
| 605 } | |
| 606 | |
| 607 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
|
608 TRACE(("connectport > 65535")) |
| 64 | 609 goto badport; |
| 610 } | |
| 611 | |
|
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
497
diff
changeset
|
612 newfwd->have_reply = 0; |
| 64 | 613 newfwd->next = *fwdlist; |
| 614 *fwdlist = newfwd; | |
| 615 | |
|
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
|
616 TRACE(("leave addforward: done")) |
| 64 | 617 return; |
| 618 | |
| 619 fail: | |
| 620 dropbear_exit("Bad TCP forward '%s'", origstr); | |
| 621 | |
| 622 badport: | |
| 623 dropbear_exit("Bad TCP port in '%s'", origstr); | |
| 624 } | |
| 625 #endif |