Mercurial > dropbear
annotate cli-runopts.c @ 540:6c906f903f1d
Wrap proxycmd function in ENABLE_CLI_PROXYCMD #ifdef
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 08 Jun 2009 14:44:23 +0000 |
parents | a3748e54273c |
children | b151e6df683e |
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() { |
39
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50 |
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51 fprintf(stderr, "Dropbear client v%s\n" |
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52 #ifdef ENABLE_CLI_MULTIHOP |
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53 "Usage: %s [options] [user@]host[/port][,[user@]host/port],...] [command]\n" |
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54 #else |
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55 "Usage: %s [options] [user@]host[/port] [command]\n" |
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56 #endif |
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57 "Options are:\n" |
47 | 58 "-p <remoteport>\n" |
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59 "-l <username>\n" |
56
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60 "-t Allocate a pty\n" |
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61 "-T Don't allocate a pty\n" |
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62 "-N Don't run a remote command\n" |
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63 "-f Run in background after auth\n" |
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64 "-y Always accept remote host key if unknown\n" |
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65 "-s Request a subsystem (use for sftp)\n" |
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66 #ifdef ENABLE_CLI_PUBKEY_AUTH |
56
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67 "-i <identityfile> (multiple allowed)\n" |
47 | 68 #endif |
64 | 69 #ifdef ENABLE_CLI_LOCALTCPFWD |
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70 "-L <listenport:remotehost:remoteport> Local port forwarding\n" |
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71 "-g Allow remote hosts to connect to forwarded ports\n" |
62 | 72 #endif |
64 | 73 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 74 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" |
75 #endif | |
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76 "-W <receive_window_buffer> (default %d, larger may be faster, max 1MB)\n" |
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77 "-K <keepalive> (0 is never, default %d)\n" |
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78 "-I <idle_timeout> (0 is never, default %d)\n" |
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79 #ifdef ENABLE_CLI_NETCAT |
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80 "-B <endhost:endport> Netcat-alike forwarding\n" |
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81 #endif |
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82 #ifdef ENABLE_CLI_PROXYCMD |
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83 "-J <proxy_program> Use program pipe rather than TCP connection\n" |
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84 #endif |
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85 #ifdef DEBUG_TRACE |
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86 "-v verbose (compiled with DEBUG_TRACE)\n" |
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87 #endif |
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88 ,DROPBEAR_VERSION, cli_opts.progname, |
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89 DEFAULT_RECV_WINDOW, DEFAULT_KEEPALIVE, DEFAULT_IDLE_TIMEOUT); |
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90 |
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91 } |
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92 |
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93 /* Note that options that affect the transport or auth layers (such as -i or |
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94 * -W) should also be passed through to a multi-hop child proxycmd, in |
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95 * parse_multihop_hostname(). */ |
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96 |
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97 void cli_getopts(int argc, char ** argv) { |
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98 |
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99 unsigned int i, j; |
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100 char ** next = 0; |
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101 unsigned int cmdlen; |
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102 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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103 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
47 | 104 #endif |
64 | 105 #ifdef ENABLE_CLI_LOCALTCPFWD |
62 | 106 int nextislocal = 0; |
107 #endif | |
64 | 108 #ifdef ENABLE_CLI_REMOTETCPFWD |
62 | 109 int nextisremote = 0; |
110 #endif | |
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111 #ifdef ENABLE_CLI_NETCAT |
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112 int nextisnetcat = 0; |
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113 #endif |
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114 char* dummy = NULL; /* Not used for anything real */ |
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115 |
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116 char* recv_window_arg = NULL; |
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117 char* keepalive_arg = NULL; |
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118 char* idle_timeout_arg = NULL; |
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119 |
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120 /* see printhelp() for options */ |
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121 cli_opts.progname = argv[0]; |
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122 cli_opts.remotehost = NULL; |
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123 cli_opts.remoteport = NULL; |
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124 cli_opts.username = NULL; |
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125 cli_opts.cmd = NULL; |
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126 cli_opts.no_cmd = 0; |
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127 cli_opts.backgrounded = 0; |
47 | 128 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
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129 cli_opts.always_accept_key = 0; |
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130 cli_opts.is_subsystem = 0; |
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131 #ifdef ENABLE_CLI_PUBKEY_AUTH |
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132 cli_opts.privkeys = NULL; |
47 | 133 #endif |
64 | 134 #ifdef ENABLE_CLI_LOCALTCPFWD |
135 cli_opts.localfwds = NULL; | |
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136 opts.listen_fwd_all = 0; |
62 | 137 #endif |
64 | 138 #ifdef ENABLE_CLI_REMOTETCPFWD |
139 cli_opts.remotefwds = NULL; | |
62 | 140 #endif |
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141 #ifdef ENABLE_CLI_PROXYCMD |
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142 cli_opts.proxycmd = NULL; |
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143 #endif |
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144 /* not yet |
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145 opts.ipv4 = 1; |
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146 opts.ipv6 = 1; |
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147 */ |
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148 opts.recv_window = DEFAULT_RECV_WINDOW; |
39
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149 |
483
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150 fill_own_user(); |
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151 |
47 | 152 /* Iterate all the arguments */ |
46
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153 for (i = 1; i < (unsigned int)argc; i++) { |
68
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154 #ifdef ENABLE_CLI_PUBKEY_AUTH |
46
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155 if (nextiskey) { |
47 | 156 /* Load a hostkey since the previous argument was "-i" */ |
157 loadidentityfile(argv[i]); | |
158 nextiskey = 0; | |
159 continue; | |
39
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160 } |
47 | 161 #endif |
64 | 162 #ifdef ENABLE_CLI_REMOTETCPFWD |
163 if (nextisremote) { | |
165
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164 TRACE(("nextisremote true")) |
64 | 165 addforward(argv[i], &cli_opts.remotefwds); |
166 nextisremote = 0; | |
167 continue; | |
168 } | |
169 #endif | |
170 #ifdef ENABLE_CLI_LOCALTCPFWD | |
171 if (nextislocal) { | |
165
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172 TRACE(("nextislocal true")) |
64 | 173 addforward(argv[i], &cli_opts.localfwds); |
174 nextislocal = 0; | |
175 continue; | |
176 } | |
177 #endif | |
485
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178 #ifdef ENABLE_CLI_NETCAT |
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179 if (nextisnetcat) { |
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180 TRACE(("nextisnetcat true")) |
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181 add_netcat(argv[i]); |
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182 nextisnetcat = 0; |
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183 continue; |
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184 } |
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185 #endif |
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186 if (next) { |
47 | 187 /* The previous flag set a value to assign */ |
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188 *next = argv[i]; |
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189 if (*next == NULL) { |
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190 dropbear_exit("Invalid null argument"); |
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191 } |
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192 next = NULL; |
39
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193 continue; |
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194 } |
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195 |
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196 if (argv[i][0] == '-') { |
47 | 197 /* A flag *waves* */ |
46
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198 |
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199 switch (argv[i][1]) { |
418
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200 case 'y': /* always accept the remote hostkey */ |
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201 cli_opts.always_accept_key = 1; |
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202 break; |
47 | 203 case 'p': /* remoteport */ |
46
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204 next = &cli_opts.remoteport; |
39
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205 break; |
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206 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 207 case 'i': /* an identityfile */ |
134 | 208 /* Keep scp happy when it changes "-i file" to "-ifile" */ |
209 if (strlen(argv[i]) > 2) { | |
210 loadidentityfile(&argv[i][2]); | |
211 } else { | |
212 nextiskey = 1; | |
213 } | |
39
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214 break; |
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215 #endif |
47 | 216 case 't': /* we want a pty */ |
217 cli_opts.wantpty = 1; | |
218 break; | |
219 case 'T': /* don't want a pty */ | |
220 cli_opts.wantpty = 0; | |
221 break; | |
325
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222 case 'N': |
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223 cli_opts.no_cmd = 1; |
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224 break; |
326
d965110e3f5c
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diff
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|
225 case 'f': |
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|
226 cli_opts.backgrounded = 1; |
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227 break; |
497
ae600f1eef81
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228 case 's': |
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229 cli_opts.is_subsystem = 1; |
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230 break; |
64 | 231 #ifdef ENABLE_CLI_LOCALTCPFWD |
232 case 'L': | |
233 nextislocal = 1; | |
234 break; | |
258
306499676384
* add -g (dbclient) and -a (dropbear) options for allowing non-local
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diff
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235 case 'g': |
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236 opts.listen_fwd_all = 1; |
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237 break; |
64 | 238 #endif |
239 #ifdef ENABLE_CLI_REMOTETCPFWD | |
240 case 'R': | |
241 nextisremote = 1; | |
242 break; | |
243 #endif | |
485
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|
244 #ifdef ENABLE_CLI_NETCAT |
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245 case 'B': |
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246 nextisnetcat = 1; |
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247 break; |
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248 #endif |
479
e3db1f7a2e43
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249 #ifdef ENABLE_CLI_PROXYCMD |
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250 case 'J': |
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251 next = &cli_opts.proxycmd; |
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252 break; |
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253 #endif |
66
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254 case 'l': |
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|
255 next = &cli_opts.username; |
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|
256 break; |
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|
257 case 'h': |
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|
258 printhelp(); |
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|
259 exit(EXIT_SUCCESS); |
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|
260 break; |
442
d82a2a44c684
Add -u option to specify /dev/urandom instead
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418
diff
changeset
|
261 case 'u': |
446
2cd2edfa11ee
Just use /dev/urandom since that's what everyone ends up using anyway.
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442
diff
changeset
|
262 /* backwards compatibility with old urandom option */ |
442
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diff
changeset
|
263 break; |
449
3e6c536bc023
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|
264 case 'W': |
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|
265 next = &recv_window_arg; |
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266 break; |
454
7e43f5e473b9
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|
267 case 'K': |
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|
268 next = &keepalive_arg; |
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269 break; |
513
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diff
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270 case 'I': |
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changeset
|
271 next = &idle_timeout_arg; |
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272 break; |
94
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|
273 #ifdef DEBUG_TRACE |
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diff
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|
274 case 'v': |
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|
275 debug_trace = 1; |
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|
276 break; |
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|
277 #endif |
66
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278 case 'F': |
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279 case 'e': |
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280 case 'c': |
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|
281 case 'm': |
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|
282 case 'D': |
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|
283 #ifndef ENABLE_CLI_REMOTETCPFWD |
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284 case 'R': |
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285 #endif |
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|
286 #ifndef ENABLE_CLI_LOCALTCPFWD |
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287 case 'L': |
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|
288 #endif |
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289 case 'o': |
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|
290 case 'b': |
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|
291 next = &dummy; |
39
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292 default: |
66
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|
293 fprintf(stderr, |
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|
294 "WARNING: Ignoring unknown argument '%s'\n", argv[i]); |
39
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295 break; |
46
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diff
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|
296 } /* Switch */ |
105 | 297 |
298 /* Now we handle args where they might be "-luser" (no spaces)*/ | |
299 if (next && strlen(argv[i]) > 2) { | |
300 *next = &argv[i][2]; | |
301 next = NULL; | |
302 } | |
46
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303 |
47 | 304 continue; /* next argument */ |
305 | |
46
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|
306 } else { |
165
0cfba3034be5
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134
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|
307 TRACE(("non-flag arg: '%s'", argv[i])) |
46
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308 |
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309 /* Either the hostname or commands */ |
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310 |
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311 if (cli_opts.remotehost == NULL) { |
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312 #ifdef ENABLE_CLI_MULTIHOP |
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313 parse_multihop_hostname(argv[i], argv[0]); |
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314 #else |
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315 parse_hostname(argv[i]); |
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316 #endif |
47 | 317 } else { |
46
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318 |
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319 /* this is part of the commands to send - after this we |
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320 * don't parse any more options, and flags are sent as the |
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321 * command */ |
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322 cmdlen = 0; |
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323 for (j = i; j < (unsigned int)argc; j++) { |
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324 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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325 } |
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326 /* Allocate the space */ |
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327 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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328 cli_opts.cmd[0] = '\0'; |
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329 |
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330 /* Append all the bits */ |
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331 for (j = i; j < (unsigned int)argc; j++) { |
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332 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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333 strlcat(cli_opts.cmd, " ", cmdlen); |
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334 } |
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335 /* It'll be null-terminated here */ |
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336 |
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337 /* We've eaten all the options and flags */ |
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338 break; |
39
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339 } |
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340 } |
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341 } |
47 | 342 |
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343 /* And now a few sanity checks and setup */ |
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344 |
47 | 345 if (cli_opts.remotehost == NULL) { |
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346 printhelp(); |
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347 exit(EXIT_FAILURE); |
47 | 348 } |
349 | |
350 if (cli_opts.remoteport == NULL) { | |
351 cli_opts.remoteport = "22"; | |
352 } | |
353 | |
354 /* If not explicitly specified with -t or -T, we don't want a pty if | |
355 * there's a command, but we do otherwise */ | |
356 if (cli_opts.wantpty == 9) { | |
357 if (cli_opts.cmd == NULL) { | |
358 cli_opts.wantpty = 1; | |
359 } else { | |
360 cli_opts.wantpty = 0; | |
361 } | |
362 } | |
326
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363 |
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364 if (cli_opts.backgrounded && cli_opts.cmd == NULL |
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365 && cli_opts.no_cmd == 0) { |
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366 dropbear_exit("command required for -f"); |
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367 } |
449
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368 |
483
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369 if (recv_window_arg) { |
449
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370 opts.recv_window = atol(recv_window_arg); |
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371 if (opts.recv_window == 0 || opts.recv_window > MAX_RECV_WINDOW) { |
449
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372 dropbear_exit("Bad recv window '%s'", recv_window_arg); |
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373 } |
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374 } |
454
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375 if (keepalive_arg) { |
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376 if (m_str_to_uint(keepalive_arg, &opts.keepalive_secs) == DROPBEAR_FAILURE) { |
454
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377 dropbear_exit("Bad keepalive '%s'", keepalive_arg); |
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378 } |
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379 } |
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380 |
513
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381 if (idle_timeout_arg) { |
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382 if (m_str_to_uint(idle_timeout_arg, &opts.idle_timeout_secs) == DROPBEAR_FAILURE) { |
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383 dropbear_exit("Bad idle_timeout '%s'", idle_timeout_arg); |
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384 } |
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385 } |
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386 |
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387 #ifdef ENABLE_CLI_NETCAT |
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388 if (cli_opts.cmd && cli_opts.netcat_host) { |
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389 dropbear_log(LOG_INFO, "Ignoring command '%s' in netcat mode", cli_opts.cmd); |
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390 } |
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391 #endif |
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392 |
39
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393 } |
47 | 394 |
68
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395 #ifdef ENABLE_CLI_PUBKEY_AUTH |
47 | 396 static void loadidentityfile(const char* filename) { |
397 | |
215
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398 struct SignKeyList * nextkey; |
47 | 399 sign_key *key; |
400 int keytype; | |
401 | |
402 key = new_sign_key(); | |
403 keytype = DROPBEAR_SIGNKEY_ANY; | |
404 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
405 | |
406 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
407 sign_key_free(key); | |
408 | |
409 } else { | |
410 | |
215
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411 nextkey = (struct SignKeyList*)m_malloc(sizeof(struct SignKeyList)); |
47 | 412 nextkey->key = key; |
215
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413 nextkey->next = cli_opts.privkeys; |
47 | 414 nextkey->type = keytype; |
215
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415 cli_opts.privkeys = nextkey; |
47 | 416 } |
417 } | |
418 #endif | |
419 | |
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420 #ifdef ENABLE_CLI_MULTIHOP |
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421 |
489
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422 /* Sets up 'onion-forwarding' connections. This will spawn |
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423 * a separate dbclient process for each hop. |
487
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424 * As an example, if the cmdline is |
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425 * dbclient wrt,madako,canyons |
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426 * then we want to run: |
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427 * dbclient -J "dbclient -B canyons:22 wrt,madako" canyons |
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428 * and then the inner dbclient will recursively run: |
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429 * dbclient -J "dbclient -B madako:22 wrt" madako |
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430 * etc for as many hosts as we want. |
489
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431 * |
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432 * Ports for hosts can be specified as host/port. |
487
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433 */ |
489
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434 static void parse_multihop_hostname(const char* orighostarg, const char* argv0) { |
487
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435 char *userhostarg = NULL; |
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436 char *last_hop = NULL;; |
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437 char *remainder = NULL; |
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438 |
494
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439 /* both scp and rsync parse a user@host argument |
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440 * and turn it into "-l user host". This breaks |
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441 * for our multihop syntax, so we suture it back together. |
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442 * This will break usernames that have both '@' and ',' in them, |
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443 * though that should be fairly uncommon. */ |
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444 if (cli_opts.username |
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445 && strchr(cli_opts.username, ',') |
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446 && strchr(cli_opts.username, '@')) { |
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447 unsigned int len = strlen(orighostarg) + strlen(cli_opts.username) + 2; |
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448 userhostarg = m_malloc(len); |
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449 snprintf(userhostarg, len, "%s@%s", cli_opts.username, orighostarg); |
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450 } else { |
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451 userhostarg = m_strdup(orighostarg); |
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452 } |
487
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453 |
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changeset
|
454 last_hop = strrchr(userhostarg, ','); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
455 if (last_hop) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
456 if (last_hop == userhostarg) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
457 dropbear_exit("Bad multi-hop hostnames"); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
458 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
459 *last_hop = '\0'; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
460 last_hop++; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
461 remainder = userhostarg; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
462 userhostarg = last_hop; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
463 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
464 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
465 parse_hostname(userhostarg); |
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
466 |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
467 if (last_hop) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
468 /* Set up the proxycmd */ |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
469 unsigned int cmd_len = 0; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
470 if (cli_opts.proxycmd) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
471 dropbear_exit("-J can't be used with multihop mode"); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
472 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
473 if (cli_opts.remoteport == NULL) { |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
474 cli_opts.remoteport = "22"; |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
475 } |
540
6c906f903f1d
Wrap proxycmd function in ENABLE_CLI_PROXYCMD #ifdef
Matt Johnston <matt@ucc.asn.au>
parents:
513
diff
changeset
|
476 cmd_len = strlen(argv0) + strlen(remainder) |
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
477 + strlen(cli_opts.remotehost) + strlen(cli_opts.remoteport) |
540
6c906f903f1d
Wrap proxycmd function in ENABLE_CLI_PROXYCMD #ifdef
Matt Johnston <matt@ucc.asn.au>
parents:
513
diff
changeset
|
478 + 30; |
487
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
479 cli_opts.proxycmd = m_malloc(cmd_len); |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
480 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
|
481 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
|
482 } |
2e17f82a7330
Add multihop 'onion-forwarding' mode. Needs refinement, works.
Matt Johnston <matt@ucc.asn.au>
parents:
486
diff
changeset
|
483 } |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
484 #endif /* !ENABLE_CLI_MULTIHOP */ |
47 | 485 |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
486 /* Parses a [user@]hostname[/port] argument. */ |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
487 static void parse_hostname(const char* orighostarg) { |
64 | 488 char *userhostarg = NULL; |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
489 char *port = NULL; |
64 | 490 |
491 userhostarg = m_strdup(orighostarg); | |
47 | 492 |
493 cli_opts.remotehost = strchr(userhostarg, '@'); | |
494 if (cli_opts.remotehost == NULL) { | |
495 /* no username portion, the cli-auth.c code can figure the | |
496 * local user's name */ | |
497 cli_opts.remotehost = userhostarg; | |
498 } else { | |
499 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
500 cli_opts.remotehost++; | |
501 cli_opts.username = userhostarg; | |
502 } | |
503 | |
504 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
|
505 cli_opts.username = m_strdup(cli_opts.own_user); |
47 | 506 } |
507 | |
489
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
508 port = strchr(cli_opts.remotehost, '/'); |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
509 if (port) { |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
510 *port = '\0'; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
511 cli_opts.remoteport = port+1; |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
512 } |
79c657a673ec
- Allow specifying a port with host/port.
Matt Johnston <matt@ucc.asn.au>
parents:
487
diff
changeset
|
513 |
47 | 514 if (cli_opts.remotehost[0] == '\0') { |
515 dropbear_exit("Bad hostname"); | |
516 } | |
517 } | |
64 | 518 |
485
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
519 #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
|
520 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
|
521 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
|
522 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
523 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
|
524 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
525 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
|
526 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
|
527 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
|
528 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
529 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
530 *portstr = '\0'; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
531 portstr++; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
532 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
533 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
|
534 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
|
535 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
536 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
537 |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
538 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
|
539 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
|
540 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
541 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
542 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
543 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
|
544 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
|
545 goto fail; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
546 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
547 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
548 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
|
549 return; |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
550 |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
551 fail: |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
552 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
|
553 } |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
554 #endif |
12d845ab7b5f
Rework netcat-alike to be a proper mode, with -B argument.
Matt Johnston <matt@ucc.asn.au>
parents:
459
diff
changeset
|
555 |
483
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
556 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
|
557 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
|
558 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
|
559 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
560 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
|
561 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
562 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
|
563 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
|
564 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
|
565 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
566 |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
567 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
|
568 } |
738313e73b1c
- "-J 'nc localhost 22'" kind of works, needs fixing hostkeys, ptys etc.
Matt Johnston <matt@ucc.asn.au>
parents:
479
diff
changeset
|
569 |
64 | 570 #ifdef ENABLE_CLI_ANYTCPFWD |
571 /* Turn a "listenport:remoteaddr:remoteport" string into into a forwarding | |
572 * 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
|
573 static void addforward(const char* origstr, struct TCPFwdList** fwdlist) { |
64 | 574 |
575 char * listenport = NULL; | |
576 char * connectport = NULL; | |
577 char * connectaddr = NULL; | |
578 struct TCPFwdList* newfwd = NULL; | |
579 char * str = NULL; | |
580 | |
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
|
581 TRACE(("enter addforward")) |
64 | 582 |
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
|
583 /* 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
|
584 is never free()d. */ |
64 | 585 str = m_strdup(origstr); |
586 | |
587 listenport = str; | |
588 | |
589 connectaddr = strchr(str, ':'); | |
590 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
|
591 TRACE(("connectaddr == NULL")) |
64 | 592 goto fail; |
593 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
594 *connectaddr = '\0'; |
64 | 595 connectaddr++; |
596 | |
597 connectport = strchr(connectaddr, ':'); | |
598 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
|
599 TRACE(("connectport == NULL")) |
64 | 600 goto fail; |
601 } | |
407
ea0929224294
Fix another leak found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents:
258
diff
changeset
|
602 *connectport = '\0'; |
64 | 603 connectport++; |
604 | |
605 newfwd = (struct TCPFwdList*)m_malloc(sizeof(struct TCPFwdList)); | |
606 | |
607 /* Now we check the ports - note that the port ints are unsigned, | |
608 * 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
|
609 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
|
610 TRACE(("bad listenport strtoul")) |
64 | 611 goto fail; |
612 } | |
613 | |
492
b956d6151600
Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents:
489
diff
changeset
|
614 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
|
615 TRACE(("bad connectport strtoul")) |
64 | 616 goto fail; |
617 } | |
618 | |
619 newfwd->connectaddr = connectaddr; | |
620 | |
621 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
|
622 TRACE(("listenport > 65535")) |
64 | 623 goto badport; |
624 } | |
625 | |
626 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
|
627 TRACE(("connectport > 65535")) |
64 | 628 goto badport; |
629 } | |
630 | |
505
805e557fdff7
Report errors if a remote request fails
Matt Johnston <matt@ucc.asn.au>
parents:
497
diff
changeset
|
631 newfwd->have_reply = 0; |
64 | 632 newfwd->next = *fwdlist; |
633 *fwdlist = newfwd; | |
634 | |
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
|
635 TRACE(("leave addforward: done")) |
64 | 636 return; |
637 | |
638 fail: | |
639 dropbear_exit("Bad TCP forward '%s'", origstr); | |
640 | |
641 badport: | |
642 dropbear_exit("Bad TCP port in '%s'", origstr); | |
643 } | |
644 #endif |