Mercurial > dropbear
annotate cli-runopts.c @ 493:6cd2152aae0b idle-timeout
Idle-timeout patch from Farrell Aultman, need to figure whether to only
account DATA packets and whether server->client data makes sense too.
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 22 Sep 2008 15:28:52 +0000 |
parents | b956d6151600 |
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rev | line source |
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1 /* |
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2 * Dropbear - a SSH2 server |
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3 * |
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4 * Copyright (c) 2002,2003 Matt Johnston |
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5 * All rights reserved. |
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6 * |
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy |
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8 * of this software and associated documentation files (the "Software"), to deal |
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9 * in the Software without restriction, including without limitation the rights |
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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11 * copies of the Software, and to permit persons to whom the Software is |
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12 * furnished to do so, subject to the following conditions: |
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13 * |
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14 * The above copyright notice and this permission notice shall be included in |
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15 * all copies or substantial portions of the Software. |
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16 * |
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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23 * SOFTWARE. */ |
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24 |
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25 #include "includes.h" |
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26 #include "runopts.h" |
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27 #include "signkey.h" |
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28 #include "buffer.h" |
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29 #include "dbutil.h" |
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30 #include "algo.h" |
64 | 31 #include "tcpfwd.h" |
39
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32 |
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33 cli_runopts cli_opts; /* GLOBAL */ |
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34 |
47 | 35 static void printhelp(); |
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36 static void parse_hostname(const char* orighostarg); |
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37 static void parse_multihop_hostname(const char* orighostarg, const char* argv0); |
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38 static void fill_own_user(); |
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39 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 40 static void loadidentityfile(const char* filename); |
41 #endif | |
64 | 42 #ifdef ENABLE_CLI_ANYTCPFWD |
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43 static void addforward(const char* str, struct TCPFwdList** fwdlist); |
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44 #endif |
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45 #ifdef ENABLE_CLI_NETCAT |
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46 static void add_netcat(const char *str); |
64 | 47 #endif |
39
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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" |
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 "-I <idle_timeout> (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, DEFAULT_IDLE_TIMEOUT); |
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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 char* idle_timeout_arg = NULL; |
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110 |
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111 /* see printhelp() for options */ |
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112 cli_opts.progname = argv[0]; |
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113 cli_opts.remotehost = NULL; |
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114 cli_opts.remoteport = NULL; |
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115 cli_opts.username = NULL; |
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116 cli_opts.cmd = NULL; |
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117 cli_opts.no_cmd = 0; |
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118 cli_opts.backgrounded = 0; |
47 | 119 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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120 cli_opts.always_accept_key = 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++) { |
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144 #ifdef ENABLE_CLI_PUBKEY_AUTH |
46
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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; | |
39
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150 } |
47 | 151 #endif |
64 | 152 #ifdef ENABLE_CLI_REMOTETCPFWD |
153 if (nextisremote) { | |
165
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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 */ |
39
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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* */ |
46
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188 |
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189 switch (argv[i][1]) { |
418
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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 */ |
46
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194 next = &cli_opts.remoteport; |
39
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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 } | |
39
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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; | |
325
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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; |
64 | 218 #ifdef ENABLE_CLI_LOCALTCPFWD |
219 case 'L': | |
220 nextislocal = 1; | |
221 break; | |
258
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222 case 'g': |
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223 opts.listen_fwd_all = 1; |
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224 break; |
64 | 225 #endif |
226 #ifdef ENABLE_CLI_REMOTETCPFWD | |
227 case 'R': | |
228 nextisremote = 1; | |
229 break; | |
230 #endif | |
485
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231 #ifdef ENABLE_CLI_NETCAT |
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232 case 'B': |
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233 nextisnetcat = 1; |
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234 break; |
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235 #endif |
479
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236 #ifdef ENABLE_CLI_PROXYCMD |
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237 case 'J': |
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238 next = &cli_opts.proxycmd; |
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239 break; |
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240 #endif |
66
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241 case 'l': |
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242 next = &cli_opts.username; |
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243 break; |
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244 case 'h': |
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245 printhelp(); |
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246 exit(EXIT_SUCCESS); |
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247 break; |
442
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248 case 'u': |
446
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249 /* backwards compatibility with old urandom option */ |
442
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|
250 break; |
449
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|
251 case 'W': |
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252 next = &recv_window_arg; |
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253 break; |
454
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254 case 'K': |
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255 next = &keepalive_arg; |
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256 break; |
493
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257 case 'I': |
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258 next = &idle_timeout_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]); |
39
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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 | |
46
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293 } else { |
165
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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) { |
489
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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 { |
46
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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; |
39
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326 } |
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327 } |
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328 } |
47 | 329 |
487
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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) { |
66
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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 } | |
326
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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 } |
449
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355 |
483
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356 if (recv_window_arg) { |
449
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357 opts.recv_window = atol(recv_window_arg); |
483
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358 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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359 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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360 } |
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361 } |
454
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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) { |
454
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364 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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365 } |
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366 } |
493
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367 if (idle_timeout_arg) { |
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368 if (m_str_to_uint(idle_timeout_arg, &opts.idle_timeout_secs) == DROPBEAR_FAILURE) { |
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369 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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370 } |
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371 } |
487
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372 |
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373 #ifdef ENABLE_CLI_NETCAT |
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374 if (cli_opts.cmd && cli_opts.netcat_host) { |
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375 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
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376 } |
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377 #endif |
454
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378 |
39
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379 } |
47 | 380 |
68
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381 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 382 static void loadidentityfile(const char* filename) { |
383 | |
215
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384 struct SignKeyList * nextkey; |
47 | 385 sign_key *key; |
386 int keytype; | |
387 | |
388 key = new_sign_key(); | |
389 keytype = DROPBEAR_SIGNKEY_ANY; | |
390 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
391 | |
392 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
393 sign_key_free(key); | |
394 | |
395 } else { | |
396 | |
215
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397 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
47 | 398 nextkey->key = key; |
215
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399 nextkey->next = cli_opts.privkeys; |
47 | 400 nextkey->type = keytype; |
215
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401 cli_opts.privkeys = nextkey; |
47 | 402 } |
403 } | |
404 #endif | |
405 | |
487
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406 #ifdef ENABLE_CLI_MULTIHOP |
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407 |
489
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408 /* Sets up 'onion-forwarding' connections. This will spawn |
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409 * a separate dbclient process for each hop. |
487
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410 * As an example, if the cmdline is |
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411 * dbclient wrt,madako,canyons |
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412 * then we want to run: |
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413 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
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414 * and then the inner dbclient will recursively run: |
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415 * dbclient -J "dbclient -B madako:22 wrt" madako |
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416 * etc for as many hosts as we want. |
489
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417 * |
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418 * Ports for hosts can be specified as host/port. |
487
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419 */ |
489
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420 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
487
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421 char *userhostarg = NULL; |
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422 char *last_hop = NULL;; |
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423 char *remainder = NULL; |
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424 |
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425 userhostarg = m_strdup(orighostarg); |
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426 |
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427 last_hop = strrchr(userhostarg, ','); |
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428 if (last_hop) { |
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429 if (last_hop == userhostarg) { |
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430 dropbear_exit("Bad multi-hop hostnames"); |
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431 } |
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432 *last_hop = '\0'; |
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433 last_hop++; |
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434 remainder = userhostarg; |
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435 userhostarg = last_hop; |
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436 } |
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437 |
489
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438 parse_hostname(userhostarg); |
487
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439 |
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440 if (last_hop) { |
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441 /* Set up the proxycmd */ |
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442 unsigned int cmd_len = 0; |
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443 if (cli_opts.proxycmd) { |
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444 dropbear_exit("-J can't be used with multihop mode"); |
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445 } |
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446 if (cli_opts.remoteport == NULL) { |
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447 cli_opts.remoteport = "22"; |
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448 } |
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449 cmd_len = strlen(remainder) |
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450 + strlen(cli_opts.remotehost) + strlen(cli_opts.remoteport) |
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451 + strlen(argv0) + 30; |
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452 cli_opts.proxycmd = m_malloc(cmd_len); |
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453 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
|
454 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
|
455 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
456 } |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
457 #endif /* !ENABLE_CLI_MULTIHOP */ |
47 | 458 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
459 /* Parses a [user@]hostname[/port] argument. */ |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
460 static void parse_hostname(const char* orighostarg) { |
64 | 461 char *userhostarg = NULL; |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
462 char *port = NULL; |
64 | 463 |
464 userhostarg = m_strdup(orighostarg); | |
47 | 465 |
466 cli_opts.remotehost = strchr(userhostarg, '@'); | |
467 if (cli_opts.remotehost == NULL) { | |
468 /* no username portion, the cli-auth.c code can figure the | |
469 * local user's name */ | |
470 cli_opts.remotehost = userhostarg; | |
471 } else { | |
472 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
473 cli_opts.remotehost++; | |
474 cli_opts.username = userhostarg; | |
475 } | |
476 | |
477 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
|
478 cli_opts.username = m_strdup(cli_opts.own_user); |
47 | 479 } |
480 | |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
481 port = strchr(cli_opts.remotehost, '/'); |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
482 if (port) { |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
483 *port = '\0'; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
484 cli_opts.remoteport = port+1; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
485 } |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
486 |
47 | 487 if (cli_opts.remotehost[0] == '\0') { |
488 dropbear_exit("Bad hostname"); | |
489 } | |
490 } | |
64 | 491 |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
492 #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
|
493 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
|
494 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
|
495 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
496 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
|
497 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
498 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
|
499 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
|
500 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
|
501 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
502 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
503 *portstr = '\0'; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
504 portstr++; |
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 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
|
507 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
|
508 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
509 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
510 |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
511 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
|
512 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
|
513 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
514 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
515 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
516 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
|
517 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
|
518 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
519 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
520 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
521 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
|
522 return; |
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 fail: |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
525 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
|
526 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
527 #endif |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
528 |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
529 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
|
530 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
|
531 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
|
532 |
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 = getuid(); |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
534 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
535 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
|
536 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
|
537 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
|
538 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
539 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
540 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
|
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 |
64 | 543 #ifdef ENABLE_CLI_ANYTCPFWD |
544 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
545 * 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
|
546 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
64 | 547 |
548 char * listenport = NULL; | |
549 char * connectport = NULL; | |
550 char * connectaddr = NULL; | |
551 struct TCPFwdList* newfwd = NULL; | |
552 char * str = NULL; | |
553 | |
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
|
554 TRACE(("enter addforward")) |
64 | 555 |
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
|
556 /* 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
|
557 is never free()d. */ |
64 | 558 str = m_strdup(origstr); |
559 | |
560 listenport = str; | |
561 | |
562 connectaddr = strchr(str, ':'); | |
563 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
|
564 TRACE(("connectaddr == NULL")) |
64 | 565 goto fail; |
566 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
567 *connectaddr = '\0'; |
64 | 568 connectaddr++; |
569 | |
570 connectport = strchr(connectaddr, ':'); | |
571 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
|
572 TRACE(("connectport == 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 *connectport = '\0'; |
64 | 576 connectport++; |
577 | |
578 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
579 | |
580 /* Now we check the ports - note that the port ints are unsigned, | |
581 * 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
|
582 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
|
583 TRACE(("bad listenport strtoul")) |
64 | 584 goto fail; |
585 } | |
586 | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
587 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
|
588 TRACE(("bad connectport strtoul")) |
64 | 589 goto fail; |
590 } | |
591 | |
592 newfwd->connectaddr = connectaddr; | |
593 | |
594 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
|
595 TRACE(("listenport > 65535")) |
64 | 596 goto badport; |
597 } | |
598 | |
599 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
|
600 TRACE(("connectport > 65535")) |
64 | 601 goto badport; |
602 } | |
603 | |
604 newfwd->next = *fwdlist; | |
605 *fwdlist = newfwd; | |
606 | |
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
|
607 TRACE(("leave addforward: done")) |
64 | 608 return; |
609 | |
610 fail: | |
611 dropbear_exit("Bad TCP forward '%s'", origstr); | |
612 | |
613 badport: | |
614 dropbear_exit("Bad TCP port in '%s'", origstr); | |
615 } | |
616 #endif |