Mercurial > dropbear
annotate cli-runopts.c @ 494:66eac4631d88
- Work around rsync and scp parsing and modifying the user@host argument,
which break's dbclient's multihop syntax
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Mon, 22 Sep 2008 15:47:35 +0000 |
| parents | b956d6151600 |
| children | ae600f1eef81 |
| 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 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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62 "-i <identityfile> (multiple allowed)\n" |
| 47 | 63 #endif |
| 64 | 64 #ifdef ENABLE_CLI_LOCALTCPFWD |
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65 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
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66 "-g Allow remote hosts to connect to forwarded ports\n" |
| 62 | 67 #endif |
| 64 | 68 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 69 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
| 70 #endif | |
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71 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
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72 "-K <keepalive> (0 is never, default %d)\n" |
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73 #ifdef ENABLE_CLI_NETCAT |
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74 "-B <endhost:endport> Netcat-alike bouncing\n" |
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75 #endif |
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76 #ifdef ENABLE_CLI_PROXYCMD |
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77 "-J <proxy_program> Use program rather than tcp connection\n" |
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78 #endif |
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79 #ifdef DEBUG_TRACE |
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80 "-v verbose\n" |
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81 #endif |
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82 ,DROPBEAR_VERSION, cli_opts.progname, |
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83 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE); |
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84 |
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85 } |
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86 |
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87 void cli_getopts(int argc, char ** argv) { |
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88 |
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89 unsigned int i, j; |
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90 char ** next = 0; |
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91 unsigned int cmdlen; |
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92 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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93 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
| 47 | 94 #endif |
| 64 | 95 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 62 | 96 int nextislocal = 0; |
| 97 #endif | |
| 64 | 98 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 62 | 99 int nextisremote = 0; |
| 100 #endif | |
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101 #ifdef ENABLE_CLI_NETCAT |
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102 int nextisnetcat = 0; |
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103 #endif |
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104 char* dummy = NULL; /* Not used for anything real */ |
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105 |
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106 char* recv_window_arg = NULL; |
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107 char* keepalive_arg = NULL; |
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108 |
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109 /* see printhelp() for options */ |
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110 cli_opts.progname = argv[0]; |
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111 cli_opts.remotehost = NULL; |
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112 cli_opts.remoteport = NULL; |
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113 cli_opts.username = NULL; |
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114 cli_opts.cmd = NULL; |
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115 cli_opts.no_cmd = 0; |
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116 cli_opts.backgrounded = 0; |
| 47 | 117 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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118 cli_opts.always_accept_key = 0; |
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119 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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120 cli_opts.privkeys = NULL; |
| 47 | 121 #endif |
| 64 | 122 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 123 cli_opts.localfwds = NULL; | |
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124 opts.listen_fwd_all = 0; |
| 62 | 125 #endif |
| 64 | 126 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 127 cli_opts.remotefwds = NULL; | |
| 62 | 128 #endif |
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129 #ifdef ENABLE_CLI_PROXYCMD |
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130 cli_opts.proxycmd = NULL; |
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131 #endif |
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132 /* not yet |
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133 opts.ipv4 = 1; |
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134 opts.ipv6 = 1; |
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135 */ |
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136 opts.recv_window = DEFAULT_RECV_WINDOW; |
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137 |
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138 fill_own_user(); |
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139 |
| 47 | 140 /* Iterate all the arguments */ |
|
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141 for (i = 1; i < (unsigned int)argc; i++) { |
|
68
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|
142 #ifdef ENABLE_CLI_PUBKEY_AUTH |
|
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143 if (nextiskey) { |
| 47 | 144 /* Load a hostkey since the previous argument was "-i" */ |
| 145 loadidentityfile(argv[i]); | |
| 146 nextiskey = 0; | |
| 147 continue; | |
|
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148 } |
| 47 | 149 #endif |
| 64 | 150 #ifdef ENABLE_CLI_REMOTETCPFWD |
| 151 if (nextisremote) { | |
|
165
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152 TRACE(("nextisremote true")) |
| 64 | 153 addforward(argv[i], &cli_opts.remotefwds); |
| 154 nextisremote = 0; | |
| 155 continue; | |
| 156 } | |
| 157 #endif | |
| 158 #ifdef ENABLE_CLI_LOCALTCPFWD | |
| 159 if (nextislocal) { | |
|
165
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160 TRACE(("nextislocal true")) |
| 64 | 161 addforward(argv[i], &cli_opts.localfwds); |
| 162 nextislocal = 0; | |
| 163 continue; | |
| 164 } | |
| 165 #endif | |
|
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166 #ifdef ENABLE_CLI_NETCAT |
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167 if (nextisnetcat) { |
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168 TRACE(("nextisnetcat true")) |
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169 add_netcat(argv[i]); |
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170 nextisnetcat = 0; |
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171 continue; |
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172 } |
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173 #endif |
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174 if (next) { |
| 47 | 175 /* The previous flag set a value to assign */ |
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176 *next = argv[i]; |
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177 if (*next == NULL) { |
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178 dropbear_exit("Invalid null argument"); |
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179 } |
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180 next = NULL; |
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181 continue; |
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182 } |
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183 |
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184 if (argv[i][0] == '-') { |
| 47 | 185 /* A flag *waves* */ |
|
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186 |
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187 switch (argv[i][1]) { |
|
418
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188 case 'y': /* always accept the remote hostkey */ |
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189 cli_opts.always_accept_key = 1; |
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190 break; |
| 47 | 191 case 'p': /* remoteport */ |
|
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192 next = &cli_opts.remoteport; |
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193 break; |
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194 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 195 case 'i': /* an identityfile */ |
| 134 | 196 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
| 197 if (strlen(argv[i]) > 2) { | |
| 198 loadidentityfile(&argv[i][2]); | |
| 199 } else { | |
| 200 nextiskey = 1; | |
| 201 } | |
|
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202 break; |
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|
203 #endif |
| 47 | 204 case 't': /* we want a pty */ |
| 205 cli_opts.wantpty = 1; | |
| 206 break; | |
| 207 case 'T': /* don't want a pty */ | |
| 208 cli_opts.wantpty = 0; | |
| 209 break; | |
|
325
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210 case 'N': |
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211 cli_opts.no_cmd = 1; |
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212 break; |
|
326
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213 case 'f': |
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214 cli_opts.backgrounded = 1; |
|
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215 break; |
| 64 | 216 #ifdef ENABLE_CLI_LOCALTCPFWD |
| 217 case 'L': | |
| 218 nextislocal = 1; | |
| 219 break; | |
|
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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220 case 'g': |
|
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221 opts.listen_fwd_all = 1; |
|
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222 break; |
| 64 | 223 #endif |
| 224 #ifdef ENABLE_CLI_REMOTETCPFWD | |
| 225 case 'R': | |
| 226 nextisremote = 1; | |
| 227 break; | |
| 228 #endif | |
|
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229 #ifdef ENABLE_CLI_NETCAT |
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230 case 'B': |
|
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231 nextisnetcat = 1; |
|
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232 break; |
|
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233 #endif |
|
479
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|
234 #ifdef ENABLE_CLI_PROXYCMD |
|
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235 case 'J': |
|
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236 next = &cli_opts.proxycmd; |
|
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|
237 break; |
|
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238 #endif |
|
66
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239 case 'l': |
|
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|
240 next = &cli_opts.username; |
|
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|
241 break; |
|
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|
242 case 'h': |
|
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243 printhelp(); |
|
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244 exit(EXIT_SUCCESS); |
|
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|
245 break; |
|
442
d82a2a44c684
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418
diff
changeset
|
246 case 'u': |
|
446
2cd2edfa11ee
Just use /dev/urandom since that's what everyone ends up using anyway.
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442
diff
changeset
|
247 /* backwards compatibility with old urandom option */ |
|
442
d82a2a44c684
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diff
changeset
|
248 break; |
|
449
3e6c536bc023
Add -W <windowsize> argument and document it.
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diff
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|
249 case 'W': |
|
3e6c536bc023
Add -W <windowsize> argument and document it.
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diff
changeset
|
250 next = &recv_window_arg; |
|
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changeset
|
251 break; |
|
454
7e43f5e473b9
- Add -K keepalive flag for dropbear and dbclient
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|
252 case 'K': |
|
7e43f5e473b9
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changeset
|
253 next = &keepalive_arg; |
|
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|
254 break; |
|
94
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|
255 #ifdef DEBUG_TRACE |
|
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|
256 case 'v': |
|
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|
257 debug_trace = 1; |
|
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|
258 break; |
|
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|
259 #endif |
|
66
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260 case 'F': |
|
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|
261 case 'e': |
|
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|
262 case 'c': |
|
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|
263 case 'm': |
|
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|
264 case 'D': |
|
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|
265 #ifndef ENABLE_CLI_REMOTETCPFWD |
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266 case 'R': |
|
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|
267 #endif |
|
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|
268 #ifndef ENABLE_CLI_LOCALTCPFWD |
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269 case 'L': |
|
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|
270 #endif |
|
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|
271 case 'o': |
|
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272 case 'b': |
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|
273 next = &dummy; |
|
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|
274 default: |
|
66
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|
275 fprintf(stderr, |
|
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|
276 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
|
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|
277 break; |
|
46
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|
278 } /* Switch */ |
| 105 | 279 |
| 280 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
| 281 if (next && strlen(argv[i]) > 2) { | |
| 282 *next = &argv[i][2]; | |
| 283 next = NULL; | |
| 284 } | |
|
46
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|
285 |
| 47 | 286 continue; /* next argument */ |
| 287 | |
|
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|
288 } else { |
|
165
0cfba3034be5
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|
289 TRACE(("non-flag arg: '%s'", argv[i])) |
|
46
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|
290 |
|
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|
291 /* Either the hostname or commands */ |
|
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|
292 |
|
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|
293 if (cli_opts.remotehost == NULL) { |
|
489
79c657a673ec
- Allow specifying a port with host/port.
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|
294 #ifdef ENABLE_CLI_MULTIHOP |
|
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- Allow specifying a port with host/port.
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|
295 parse_multihop_hostname(argv[i], argv[0]); |
|
79c657a673ec
- Allow specifying a port with host/port.
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diff
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|
296 #else |
|
79c657a673ec
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diff
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|
297 parse_hostname(argv[i]); |
|
79c657a673ec
- Allow specifying a port with host/port.
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298 #endif |
| 47 | 299 } else { |
|
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300 |
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301 /* this is part of the commands to send - after this we |
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302 * don't parse any more options, and flags are sent as the |
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303 * command */ |
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304 cmdlen = 0; |
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305 for (j = i; j < (unsigned int)argc; j++) { |
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306 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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307 } |
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308 /* Allocate the space */ |
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309 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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310 cli_opts.cmd[0] = '\0'; |
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311 |
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312 /* Append all the bits */ |
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313 for (j = i; j < (unsigned int)argc; j++) { |
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314 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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315 strlcat(cli_opts.cmd, " ", cmdlen); |
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316 } |
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317 /* It'll be null-terminated here */ |
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318 |
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319 /* We've eaten all the options and flags */ |
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320 break; |
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321 } |
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322 } |
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323 } |
| 47 | 324 |
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325 /* And now a few sanity checks and setup */ |
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326 |
| 47 | 327 if (cli_opts.remotehost == NULL) { |
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328 printhelp(); |
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329 exit(EXIT_FAILURE); |
| 47 | 330 } |
| 331 | |
| 332 if (cli_opts.remoteport == NULL) { | |
| 333 cli_opts.remoteport = "22"; | |
| 334 } | |
| 335 | |
| 336 /* If not explicitly specified with -t or -T, we don't want a pty if | |
| 337 * there's a command, but we do otherwise */ | |
| 338 if (cli_opts.wantpty == 9) { | |
| 339 if (cli_opts.cmd == NULL) { | |
| 340 cli_opts.wantpty = 1; | |
| 341 } else { | |
| 342 cli_opts.wantpty = 0; | |
| 343 } | |
| 344 } | |
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345 |
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346 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
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347 && cli_opts.no_cmd == 0) { |
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348 dropbear_exit("command required for -f"); |
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349 } |
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350 |
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351 if (recv_window_arg) { |
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352 opts.recv_window = atol(recv_window_arg); |
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353 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
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354 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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355 } |
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356 } |
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357 if (keepalive_arg) { |
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358 if (m_str_to_uint(keepalive_arg, &opts.keepalive_secs) == DROPBEAR_FAILURE) { |
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359 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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360 } |
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361 } |
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362 |
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363 #ifdef ENABLE_CLI_NETCAT |
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364 if (cli_opts.cmd && cli_opts.netcat_host) { |
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365 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
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366 } |
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367 #endif |
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368 |
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369 } |
| 47 | 370 |
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371 #ifdef ENABLE_CLI_PUBKEY_AUTH |
| 47 | 372 static void loadidentityfile(const char* filename) { |
| 373 | |
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374 struct SignKeyList * nextkey; |
| 47 | 375 sign_key *key; |
| 376 int keytype; | |
| 377 | |
| 378 key = new_sign_key(); | |
| 379 keytype = DROPBEAR_SIGNKEY_ANY; | |
| 380 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
| 381 | |
| 382 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
| 383 sign_key_free(key); | |
| 384 | |
| 385 } else { | |
| 386 | |
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387 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
| 47 | 388 nextkey->key = key; |
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389 nextkey->next = cli_opts.privkeys; |
| 47 | 390 nextkey->type = keytype; |
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391 cli_opts.privkeys = nextkey; |
| 47 | 392 } |
| 393 } | |
| 394 #endif | |
| 395 | |
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396 #ifdef ENABLE_CLI_MULTIHOP |
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397 |
|
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398 /* Sets up 'onion-forwarding' connections. This will spawn |
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399 * a separate dbclient process for each hop. |
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400 * As an example, if the cmdline is |
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401 * dbclient wrt,madako,canyons |
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402 * then we want to run: |
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403 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
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404 * and then the inner dbclient will recursively run: |
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405 * dbclient -J "dbclient -B madako:22 wrt" madako |
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406 * etc for as many hosts as we want. |
|
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407 * |
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408 * Ports for hosts can be specified as host/port. |
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409 */ |
|
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410 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
|
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411 char *userhostarg = NULL; |
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412 char *last_hop = NULL;; |
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413 char *remainder = NULL; |
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414 |
|
494
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415 /* both scp and rsync parse a user@host argument |
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416 * and turn it into "-l user host". This breaks |
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417 * for our multihop syntax, so we suture it back together. |
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418 * This will break usernames that have both '@' and ',' in them, |
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419 * though that should be fairly uncommon. */ |
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420 if (cli_opts.username |
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421 && strchr(cli_opts.username, ',') |
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422 && strchr(cli_opts.username, '@')) { |
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423 unsigned int len = strlen(orighostarg) + strlen(cli_opts.username) + 2; |
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424 userhostarg = m_malloc(len); |
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425 snprintf(userhostarg, len, "%s@%s", cli_opts.username, orighostarg); |
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426 } else { |
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427 userhostarg = m_strdup(orighostarg); |
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428 } |
|
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429 |
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430 last_hop = strrchr(userhostarg, ','); |
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431 if (last_hop) { |
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432 if (last_hop == userhostarg) { |
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433 dropbear_exit("Bad multi-hop hostnames"); |
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434 } |
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435 *last_hop = '\0'; |
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436 last_hop++; |
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437 remainder = userhostarg; |
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438 userhostarg = last_hop; |
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439 } |
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2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
440 |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
441 parse_hostname(userhostarg); |
|
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
442 |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
443 if (last_hop) { |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
444 /* Set up the proxycmd */ |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
445 unsigned int cmd_len = 0; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
446 if (cli_opts.proxycmd) { |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
447 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
|
448 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
449 if (cli_opts.remoteport == NULL) { |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
450 cli_opts.remoteport = "22"; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
451 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
452 cmd_len = strlen(remainder) |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
453 + 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
|
454 + strlen(argv0) + 30; |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
455 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
|
456 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
|
457 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
|
458 } |
|
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
459 } |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
460 #endif /* !ENABLE_CLI_MULTIHOP */ |
| 47 | 461 |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
462 /* Parses a [user@]hostname[/port] argument. */ |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
463 static void parse_hostname(const char* orighostarg) { |
| 64 | 464 char *userhostarg = NULL; |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
465 char *port = NULL; |
| 64 | 466 |
| 467 userhostarg = m_strdup(orighostarg); | |
| 47 | 468 |
| 469 cli_opts.remotehost = strchr(userhostarg, '@'); | |
| 470 if (cli_opts.remotehost == NULL) { | |
| 471 /* no username portion, the cli-auth.c code can figure the | |
| 472 * local user's name */ | |
| 473 cli_opts.remotehost = userhostarg; | |
| 474 } else { | |
| 475 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
| 476 cli_opts.remotehost++; | |
| 477 cli_opts.username = userhostarg; | |
| 478 } | |
| 479 | |
| 480 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
|
481 cli_opts.username = m_strdup(cli_opts.own_user); |
| 47 | 482 } |
| 483 | |
|
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
484 port = strchr(cli_opts.remotehost, '/'); |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
485 if (port) { |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
486 *port = '\0'; |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
487 cli_opts.remoteport = port+1; |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
488 } |
|
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
489 |
| 47 | 490 if (cli_opts.remotehost[0] == '\0') { |
| 491 dropbear_exit("Bad hostname"); | |
| 492 } | |
| 493 } | |
| 64 | 494 |
|
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
495 #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
|
496 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
|
497 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
|
498 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
499 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
|
500 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
501 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
|
502 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
|
503 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
|
504 goto fail; |
|
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 = '\0'; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
507 portstr++; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
508 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
509 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
|
510 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
|
511 goto fail; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
512 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
513 |
|
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
514 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
|
515 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
|
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 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
519 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
|
520 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
|
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 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
|
525 return; |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
526 |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
527 fail: |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
528 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
|
529 } |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
530 #endif |
|
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
531 |
|
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
532 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
|
533 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
|
534 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
|
535 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
536 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
|
537 |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
538 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
|
539 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
|
540 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
|
541 } |
|
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 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
|
544 } |
|
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
545 |
| 64 | 546 #ifdef ENABLE_CLI_ANYTCPFWD |
| 547 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
| 548 * 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
|
549 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
| 64 | 550 |
| 551 char * listenport = NULL; | |
| 552 char * connectport = NULL; | |
| 553 char * connectaddr = NULL; | |
| 554 struct TCPFwdList* newfwd = NULL; | |
| 555 char * str = NULL; | |
| 556 | |
|
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
|
557 TRACE(("enter addforward")) |
| 64 | 558 |
|
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
|
559 /* 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
|
560 is never free()d. */ |
| 64 | 561 str = m_strdup(origstr); |
| 562 | |
| 563 listenport = str; | |
| 564 | |
| 565 connectaddr = strchr(str, ':'); | |
| 566 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
|
567 TRACE(("connectaddr == NULL")) |
| 64 | 568 goto fail; |
| 569 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
570 *connectaddr = '\0'; |
| 64 | 571 connectaddr++; |
| 572 | |
| 573 connectport = strchr(connectaddr, ':'); | |
| 574 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
|
575 TRACE(("connectport == NULL")) |
| 64 | 576 goto fail; |
| 577 } | |
|
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
578 *connectport = '\0'; |
| 64 | 579 connectport++; |
| 580 | |
| 581 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
| 582 | |
| 583 /* Now we check the ports - note that the port ints are unsigned, | |
| 584 * 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
|
585 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
|
586 TRACE(("bad listenport strtoul")) |
| 64 | 587 goto fail; |
| 588 } | |
| 589 | |
|
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(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
|
591 TRACE(("bad connectport strtoul")) |
| 64 | 592 goto fail; |
| 593 } | |
| 594 | |
| 595 newfwd->connectaddr = connectaddr; | |
| 596 | |
| 597 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
|
598 TRACE(("listenport > 65535")) |
| 64 | 599 goto badport; |
| 600 } | |
| 601 | |
| 602 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
|
603 TRACE(("connectport > 65535")) |
| 64 | 604 goto badport; |
| 605 } | |
| 606 | |
| 607 newfwd->next = *fwdlist; | |
| 608 *fwdlist = newfwd; | |
| 609 | |
|
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
|
610 TRACE(("leave addforward: done")) |
| 64 | 611 return; |
| 612 | |
| 613 fail: | |
| 614 dropbear_exit("Bad TCP forward '%s'", origstr); | |
| 615 | |
| 616 badport: | |
| 617 dropbear_exit("Bad TCP port in '%s'", origstr); | |
| 618 } | |
| 619 #endif |