Mercurial > dropbear
annotate cli-runopts.c @ 492:b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 22 Sep 2008 14:13:44 +0000 |
parents | 79c657a673ec |
children | 6cd2152aae0b 66eac4631d88 |
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 #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; | |
446
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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++) { |
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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 | |
485
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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 |
39
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174 if (next) { |
47 | 175 /* The previous flag set a value to assign */ |
39
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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 } |
46
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180 next = NULL; |
39
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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* */ |
46
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186 |
39
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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 */ |
46
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192 next = &cli_opts.remoteport; |
39
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193 break; |
68
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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 } | |
39
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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
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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 | |
485
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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
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246 case 'u': |
446
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247 /* backwards compatibility with old urandom option */ |
442
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248 break; |
449
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|
249 case 'W': |
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250 next = &recv_window_arg; |
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251 break; |
454
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252 case 'K': |
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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; |
39
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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]); |
39
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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 | |
46
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288 } else { |
165
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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
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294 #ifdef ENABLE_CLI_MULTIHOP |
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295 parse_multihop_hostname(argv[i], argv[0]); |
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296 #else |
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297 parse_hostname(argv[i]); |
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298 #endif |
47 | 299 } else { |
46
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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; |
39
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321 } |
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322 } |
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323 } |
47 | 324 |
487
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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 } | |
326
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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 } |
449
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350 |
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351 if (recv_window_arg) { |
449
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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) { |
449
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354 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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355 } |
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356 } |
454
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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) { |
454
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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 |
68
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371 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 372 static void loadidentityfile(const char* filename) { |
373 | |
215
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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 | |
215
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387 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
47 | 388 nextkey->key = key; |
215
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389 nextkey->next = cli_opts.privkeys; |
47 | 390 nextkey->type = keytype; |
215
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391 cli_opts.privkeys = nextkey; |
47 | 392 } |
393 } | |
394 #endif | |
395 | |
487
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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. |
487
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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. |
487
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409 */ |
489
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410 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
487
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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 |
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415 userhostarg = m_strdup(orighostarg); |
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416 |
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417 last_hop = strrchr(userhostarg, ','); |
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418 if (last_hop) { |
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419 if (last_hop == userhostarg) { |
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420 dropbear_exit("Bad multi-hop hostnames"); |
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421 } |
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422 *last_hop = '\0'; |
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423 last_hop++; |
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424 remainder = userhostarg; |
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425 userhostarg = last_hop; |
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426 } |
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427 |
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428 parse_hostname(userhostarg); |
487
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429 |
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430 if (last_hop) { |
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431 /* Set up the proxycmd */ |
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432 unsigned int cmd_len = 0; |
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433 if (cli_opts.proxycmd) { |
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434 dropbear_exit("-J can't be used with multihop mode"); |
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435 } |
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436 if (cli_opts.remoteport == NULL) { |
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437 cli_opts.remoteport = "22"; |
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438 } |
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439 cmd_len = strlen(remainder) |
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440 + strlen(cli_opts.remotehost) + strlen(cli_opts.remoteport) |
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441 + strlen(argv0) + 30; |
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442 cli_opts.proxycmd = m_malloc(cmd_len); |
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443 snprintf(cli_opts.proxycmd, cmd_len, "%s -B %s:%s %s", |
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444 argv0, cli_opts.remotehost, cli_opts.remoteport, remainder); |
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445 } |
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446 } |
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447 #endif /* !ENABLE_CLI_MULTIHOP */ |
47 | 448 |
489
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449 /* Parses a [user@]hostname[/port] argument. */ |
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450 static void parse_hostname(const char* orighostarg) { |
64 | 451 char *userhostarg = NULL; |
489
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452 char *port = NULL; |
64 | 453 |
454 userhostarg = m_strdup(orighostarg); | |
47 | 455 |
456 cli_opts.remotehost = strchr(userhostarg, '@'); | |
457 if (cli_opts.remotehost == NULL) { | |
458 /* no username portion, the cli-auth.c code can figure the | |
459 * local user's name */ | |
460 cli_opts.remotehost = userhostarg; | |
461 } else { | |
462 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
463 cli_opts.remotehost++; | |
464 cli_opts.username = userhostarg; | |
465 } | |
466 | |
467 if (cli_opts.username == NULL) { | |
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468 cli_opts.username = m_strdup(cli_opts.own_user); |
47 | 469 } |
470 | |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
471 port = strchr(cli_opts.remotehost, '/'); |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
472 if (port) { |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
473 *port = '\0'; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
474 cli_opts.remoteport = port+1; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
475 } |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
476 |
47 | 477 if (cli_opts.remotehost[0] == '\0') { |
478 dropbear_exit("Bad hostname"); | |
479 } | |
480 } | |
64 | 481 |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
482 #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
|
483 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
|
484 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
|
485 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
486 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
|
487 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
488 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
|
489 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
|
490 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
|
491 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
492 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
493 *portstr = '\0'; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
494 portstr++; |
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 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
|
497 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
|
498 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
499 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
500 |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
501 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
|
502 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
|
503 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
504 } |
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 (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
|
507 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
|
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 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
511 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
|
512 return; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
513 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
514 fail: |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
515 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
|
516 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
517 #endif |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
518 |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
519 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
|
520 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
|
521 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
|
522 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
523 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
|
524 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
525 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
|
526 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
|
527 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
|
528 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
529 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
530 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
|
531 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
532 |
64 | 533 #ifdef ENABLE_CLI_ANYTCPFWD |
534 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
535 * 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
|
536 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
64 | 537 |
538 char * listenport = NULL; | |
539 char * connectport = NULL; | |
540 char * connectaddr = NULL; | |
541 struct TCPFwdList* newfwd = NULL; | |
542 char * str = NULL; | |
543 | |
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
|
544 TRACE(("enter addforward")) |
64 | 545 |
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
|
546 /* 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
|
547 is never free()d. */ |
64 | 548 str = m_strdup(origstr); |
549 | |
550 listenport = str; | |
551 | |
552 connectaddr = strchr(str, ':'); | |
553 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
|
554 TRACE(("connectaddr == NULL")) |
64 | 555 goto fail; |
556 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
557 *connectaddr = '\0'; |
64 | 558 connectaddr++; |
559 | |
560 connectport = strchr(connectaddr, ':'); | |
561 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
|
562 TRACE(("connectport == NULL")) |
64 | 563 goto fail; |
564 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
565 *connectport = '\0'; |
64 | 566 connectport++; |
567 | |
568 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
569 | |
570 /* Now we check the ports - note that the port ints are unsigned, | |
571 * 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
|
572 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
|
573 TRACE(("bad listenport strtoul")) |
64 | 574 goto fail; |
575 } | |
576 | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
577 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
|
578 TRACE(("bad connectport strtoul")) |
64 | 579 goto fail; |
580 } | |
581 | |
582 newfwd->connectaddr = connectaddr; | |
583 | |
584 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
|
585 TRACE(("listenport > 65535")) |
64 | 586 goto badport; |
587 } | |
588 | |
589 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
|
590 TRACE(("connectport > 65535")) |
64 | 591 goto badport; |
592 } | |
593 | |
594 newfwd->next = *fwdlist; | |
595 *fwdlist = newfwd; | |
596 | |
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
|
597 TRACE(("leave addforward: done")) |
64 | 598 return; |
599 | |
600 fail: | |
601 dropbear_exit("Bad TCP forward '%s'", origstr); | |
602 | |
603 badport: | |
604 dropbear_exit("Bad TCP port in '%s'", origstr); | |
605 } | |
606 #endif |