Mercurial > dropbear
annotate cli-runopts.c @ 63:dcc43965928f
- A nice cleaner structure for tcp (acceptor) forwarding.
- still a checkpoint-ish commit
- sorted out listening on localhost only
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 11 Aug 2004 17:26:47 +0000 |
| parents | 20563735e8b5 |
| children | efb5e0b335cf |
| 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" |
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31 |
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32 cli_runopts cli_opts; /* GLOBAL */ |
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33 |
| 47 | 34 static void printhelp(); |
| 35 static void parsehostname(char* userhostarg); | |
| 36 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 37 static void loadidentityfile(const char* filename); | |
| 38 #endif | |
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39 |
| 47 | 40 static void printhelp() { |
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41 |
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42 fprintf(stderr, "Dropbear client v%s\n" |
| 47 | 43 "Usage: %s [options] user@host\n" |
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44 "Options are:\n" |
| 47 | 45 "-p <remoteport>\n" |
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56
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46 "-t Allocate a pty\n" |
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47 "-T Don't allocate a pty\n" |
| 47 | 48 #ifdef DROPBEAR_PUBKEY_AUTH |
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49 "-i <identityfile> (multiple allowed)\n" |
| 47 | 50 #endif |
| 62 | 51 #ifndef DISABLE_REMOTETCPFWD |
| 52 "-L <listenport:remotehsot:reportport> Local port forwarding\n" | |
| 53 #endif | |
| 54 #ifndef DISABLE_TCPFWD_DIRECT | |
| 55 "-R <listenport:remotehost:remoteport> Remote port forwarding\n" | |
| 56 #endif | |
| 47 | 57 ,DROPBEAR_VERSION, cli_opts.progname); |
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58 } |
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59 |
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60 void cli_getopts(int argc, char ** argv) { |
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61 |
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62 unsigned int i, j; |
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63 char ** next = 0; |
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64 unsigned int cmdlen; |
| 47 | 65 #ifdef DROPBEAR_PUBKEY_AUTH |
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66 int nextiskey = 0; /* A flag if the next argument is a keyfile */ |
| 47 | 67 #endif |
| 62 | 68 #ifdef DROPBEAR_CLI_LOCALTCP |
| 69 int nextislocal = 0; | |
| 70 #endif | |
| 71 #ifdef DROPBEAR_CLI_REMOTETCP | |
| 72 int nextisremote = 0; | |
| 73 #endif | |
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74 |
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75 |
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76 |
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77 /* see printhelp() for options */ |
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78 cli_opts.progname = argv[0]; |
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79 cli_opts.remotehost = NULL; |
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80 cli_opts.remoteport = NULL; |
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81 cli_opts.username = NULL; |
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82 cli_opts.cmd = NULL; |
| 47 | 83 cli_opts.wantpty = 9; /* 9 means "it hasn't been touched", gets set later */ |
| 84 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 85 cli_opts.pubkeys = NULL; | |
| 86 #endif | |
| 62 | 87 #ifdef DROPBEAR_CLI_LOCALTCP |
| 88 cli_opts.localports = NULL; | |
| 89 #endif | |
| 90 #ifdef DROPBEAR_CLI_REMOTETCP | |
| 91 cli_opts.remoteports = NULL; | |
| 92 #endif | |
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93 opts.nolocaltcp = 0; |
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94 opts.noremotetcp = 0; |
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95 /* not yet |
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96 opts.ipv4 = 1; |
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97 opts.ipv6 = 1; |
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98 */ |
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99 |
| 47 | 100 /* Iterate all the arguments */ |
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101 for (i = 1; i < (unsigned int)argc; i++) { |
| 47 | 102 #ifdef DROPBEAR_PUBKEY_AUTH |
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103 if (nextiskey) { |
| 47 | 104 /* Load a hostkey since the previous argument was "-i" */ |
| 105 loadidentityfile(argv[i]); | |
| 106 nextiskey = 0; | |
| 107 continue; | |
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108 } |
| 47 | 109 #endif |
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110 if (next) { |
| 47 | 111 /* The previous flag set a value to assign */ |
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112 *next = argv[i]; |
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113 if (*next == NULL) { |
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114 dropbear_exit("Invalid null argument"); |
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115 } |
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116 next = NULL; |
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117 continue; |
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118 } |
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119 |
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120 if (argv[i][0] == '-') { |
| 47 | 121 /* A flag *waves* */ |
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122 |
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123 switch (argv[i][1]) { |
| 47 | 124 case 'p': /* remoteport */ |
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125 next = &cli_opts.remoteport; |
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126 break; |
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127 #ifdef DROPBEAR_PUBKEY_AUTH |
| 47 | 128 case 'i': /* an identityfile */ |
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129 nextiskey = 1; |
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130 break; |
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131 #endif |
| 47 | 132 case 't': /* we want a pty */ |
| 133 cli_opts.wantpty = 1; | |
| 134 break; | |
| 135 case 'T': /* don't want a pty */ | |
| 136 cli_opts.wantpty = 0; | |
| 137 break; | |
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138 default: |
| 47 | 139 fprintf(stderr, "Unknown argument '%s'\n", argv[i]); |
| 140 printhelp(); | |
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141 exit(EXIT_FAILURE); |
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142 break; |
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143 } /* Switch */ |
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144 |
| 47 | 145 continue; /* next argument */ |
| 146 | |
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147 } else { |
| 47 | 148 TRACE(("non-flag arg")); |
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149 |
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150 /* Either the hostname or commands */ |
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151 |
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152 if (cli_opts.remotehost == NULL) { |
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153 |
| 47 | 154 parsehostname(argv[i]); |
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155 |
| 47 | 156 } else { |
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157 |
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158 /* this is part of the commands to send - after this we |
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159 * don't parse any more options, and flags are sent as the |
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160 * command */ |
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161 cmdlen = 0; |
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162 for (j = i; j < (unsigned int)argc; j++) { |
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163 cmdlen += strlen(argv[j]) + 1; /* +1 for spaces */ |
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164 } |
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165 /* Allocate the space */ |
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166 cli_opts.cmd = (char*)m_malloc(cmdlen); |
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167 cli_opts.cmd[0] = '\0'; |
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168 |
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169 /* Append all the bits */ |
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170 for (j = i; j < (unsigned int)argc; j++) { |
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171 strlcat(cli_opts.cmd, argv[j], cmdlen); |
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172 strlcat(cli_opts.cmd, " ", cmdlen); |
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173 } |
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174 /* It'll be null-terminated here */ |
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175 |
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176 /* We've eaten all the options and flags */ |
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177 break; |
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178 } |
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179 } |
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180 } |
| 47 | 181 |
| 182 if (cli_opts.remotehost == NULL) { | |
| 183 dropbear_exit("Bad syntax"); | |
| 184 } | |
| 185 | |
| 186 if (cli_opts.remoteport == NULL) { | |
| 187 cli_opts.remoteport = "22"; | |
| 188 } | |
| 189 | |
| 190 /* If not explicitly specified with -t or -T, we don't want a pty if | |
| 191 * there's a command, but we do otherwise */ | |
| 192 if (cli_opts.wantpty == 9) { | |
| 193 if (cli_opts.cmd == NULL) { | |
| 194 cli_opts.wantpty = 1; | |
| 195 } else { | |
| 196 cli_opts.wantpty = 0; | |
| 197 } | |
| 198 } | |
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199 } |
| 47 | 200 |
| 201 #ifdef DROPBEAR_PUBKEY_AUTH | |
| 202 static void loadidentityfile(const char* filename) { | |
| 203 | |
| 204 struct PubkeyList * nextkey; | |
| 205 sign_key *key; | |
| 206 int keytype; | |
| 207 | |
| 208 key = new_sign_key(); | |
| 209 keytype = DROPBEAR_SIGNKEY_ANY; | |
| 210 if ( readhostkey(filename, key, &keytype) != DROPBEAR_SUCCESS ) { | |
| 211 | |
| 212 fprintf(stderr, "Failed loading keyfile '%s'\n", filename); | |
| 213 sign_key_free(key); | |
| 214 | |
| 215 } else { | |
| 216 | |
| 217 nextkey = (struct PubkeyList*)m_malloc(sizeof(struct PubkeyList)); | |
| 218 nextkey->key = key; | |
| 219 nextkey->next = cli_opts.pubkeys; | |
| 220 nextkey->type = keytype; | |
| 221 cli_opts.pubkeys = nextkey; | |
| 222 } | |
| 223 } | |
| 224 #endif | |
| 225 | |
| 226 | |
| 227 /* Parses a [user@]hostname argument. userhostarg is the argv[i] corresponding | |
| 228 * - note that it will be modified */ | |
| 229 static void parsehostname(char* userhostarg) { | |
| 230 | |
| 231 uid_t uid; | |
| 232 struct passwd *pw = NULL; | |
| 233 | |
| 234 cli_opts.remotehost = strchr(userhostarg, '@'); | |
| 235 if (cli_opts.remotehost == NULL) { | |
| 236 /* no username portion, the cli-auth.c code can figure the | |
| 237 * local user's name */ | |
| 238 cli_opts.remotehost = userhostarg; | |
| 239 } else { | |
| 240 cli_opts.remotehost[0] = '\0'; /* Split the user/host */ | |
| 241 cli_opts.remotehost++; | |
| 242 cli_opts.username = userhostarg; | |
| 243 } | |
| 244 | |
| 245 if (cli_opts.username == NULL) { | |
| 246 uid = getuid(); | |
| 247 | |
| 248 pw = getpwuid(uid); | |
| 249 if (pw == NULL || pw->pw_name == NULL) { | |
| 250 dropbear_exit("Unknown own user"); | |
| 251 } | |
| 252 | |
| 253 cli_opts.username = m_strdup(pw->pw_name); | |
| 254 } | |
| 255 | |
| 256 if (cli_opts.remotehost[0] == '\0') { | |
| 257 dropbear_exit("Bad hostname"); | |
| 258 } | |
| 259 } |