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/* Copyright 2001,2002 Roger Dingledine, Matej Pfajfar. */
/* See LICENSE for licensing information */
/* $Id$ */
/**
* config.c
* Routines for loading the configuration file.
*
* Matej Pfajfar <mp292@cam.ac.uk>
*/
#include "or.h"
#include <libgen.h>
/* loads the configuration file */
int getconfig(char *conf_filename, config_opt_t *options)
{
FILE *cf = NULL;
int retval = 0;
if ((!conf_filename) || (!options))
return -1;
/* load config file */
cf = open_config(conf_filename);
if (!cf)
{
log(LOG_ERR,"Could not open configuration file %s.",conf_filename);
return -1;
}
retval = parse_config(cf,options);
if (retval)
return -1;
return 0;
}
int getoptions(int argc, char **argv, or_options_t *options)
/**
A replacement for getargs() and getconfig() which uses the <popt> library to parse
both command-line arguments and configuration files. A specific configuration file
may be specified using the --ConfigFile option. If one is not specified, then the
configuration files at /etc/<cmd>rc and ~/.<cmd>rc will be loaded in that order so
user preferences will override the ones specified in /etc.
The --ConfigFile (-f) option may only be used on the command-line. All other command-line
options may also be specified in configuration files. <popt> aliases are enabled
so a user can define their own options in the /etc/popt or ~/.popt files as outlined
in "man popt" pages.
RETURN VALUE: 0 on success, non-zero on error
**/
{
char *ConfigFile;
int Verbose;
int code;
poptContext optCon;
char *cmd;
struct poptOption opt_tab[] =
{
{ "APPort", 'a', POPT_ARG_INT, &options->APPort,
0, "application proxy port", "<port>" },
{ "CoinWeight", 'w', POPT_ARG_FLOAT, &options->CoinWeight,
0, "coin weight used in determining routes", "<weight>" },
{ "ConfigFile", 'f', POPT_ARG_STRING, &ConfigFile,
0, "user specified configuration file", "<file>" },
{ "LogLevel", 'l', POPT_ARG_STRING, &options->LogLevel,
0, "emerg|alert|crit|err|warning|notice|info|debug", "<level>" },
{ "MaxConn", 'm', POPT_ARG_INT, &options->MaxConn,
0, "maximum number of incoming connections", "<max>" },
{ "OPPort", 'o', POPT_ARG_INT, &options->OPPort,
0, "onion proxy port", "<port>" },
{ "ORPort", 'p', POPT_ARG_INT, &options->ORPort,
0, "onion router port", "<port>" },
{ "PrivateKeyFile", 'k', POPT_ARG_STRING, &options->PrivateKeyFile,
0, "maximum number of incoming connections", "<file>" },
{ "RouterFile", 'r', POPT_ARG_STRING, &options->RouterFile,
0, "local port on which the onion proxy is running", "<file>" },
{ "TrafficShaping", 't', POPT_ARG_INT, &options->TrafficShaping,
0, "which traffic shaping policy to use", "<policy>" },
{ "LinkPadding", 'P', POPT_ARG_INT, &options->LinkPadding,
0, "whether to use link padding", "<padding>" },
{ "Role", 'g', POPT_ARG_INT, &options->Role,
0, "4-bit global role id", "<role>" },
{ "Verbose", 'v', POPT_ARG_NONE, &Verbose,
0, "display options selected before execution", NULL },
POPT_AUTOHELP /* handles --usage and --help automatically */
POPT_TABLEEND /* marks end of table */
};
cmd = basename(argv[0]);
optCon = poptGetContext(cmd,argc,(const char **)argv,opt_tab,0);
poptReadDefaultConfig(optCon,0); /* read <popt> alias definitions */
/* assign default option values */
bzero(options,sizeof(or_options_t));
options->LogLevel = "debug";
options->loglevel = LOG_DEBUG;
options->CoinWeight = 0.8;
options->LinkPadding = 0;
options->Role = ROLE_OR_LISTEN | ROLE_OR_CONNECT_ALL | ROLE_OP_LISTEN | ROLE_AP_LISTEN;
code = poptGetNextOpt(optCon); /* first we handle command-line args */
if ( code == -1 )
{
if ( ConfigFile ) /* handle user-specified config file */
code = poptReadOptions(optCon,ConfigFile);
else /* load Default configuration files */
code = poptReadDefaultOptions(cmd,optCon);
}
switch(code) /* error checking */
{
case INT_MIN:
log(LOG_ERR, "%s: Unable to open configuration file.\n", ConfigFile);
break;
case -1:
code = 0;
break;
default:
poptPrintUsage(optCon, stderr, 0);
log(LOG_ERR, "%s: %s\n", poptBadOption(optCon, POPT_BADOPTION_NOALIAS), poptStrerror(code));
break;
}
poptFreeContext(optCon);
if ( code ) return code; /* return here if we encountered any problems */
/* Display options upon user request */
if ( Verbose )
{
printf("LogLevel=%s, Role=%d\n",
options->LogLevel,
options->Role);
printf("RouterFile=%s, PrivateKeyFile=%s\n",
options->RouterFile,
options->PrivateKeyFile);
printf("ORPort=%d, OPPort=%d, APPort=%d\n",
options->ORPort,options->OPPort,
options->APPort);
printf("CoinWeight=%6.4f, MaxConn=%d, TrafficShaping=%d, LinkPadding=%d\n",
options->CoinWeight,
options->MaxConn,
options->TrafficShaping,
options->LinkPadding);
}
/* Validate options */
if ( options->LogLevel )
{
if (!strcmp(options->LogLevel,"emerg"))
options->loglevel = LOG_EMERG;
else if (!strcmp(options->LogLevel,"alert"))
options->loglevel = LOG_ALERT;
else if (!strcmp(options->LogLevel,"crit"))
options->loglevel = LOG_CRIT;
else if (!strcmp(options->LogLevel,"err"))
options->loglevel = LOG_ERR;
else if (!strcmp(options->LogLevel,"warning"))
options->loglevel = LOG_WARNING;
else if (!strcmp(options->LogLevel,"notice"))
options->loglevel = LOG_NOTICE;
else if (!strcmp(options->LogLevel,"info"))
options->loglevel = LOG_INFO;
else if (!strcmp(options->LogLevel,"debug"))
options->loglevel = LOG_DEBUG;
else
{
log(LOG_ERR,"LogLevel must be one of emerg|alert|crit|err|warning|notice|info|debug.");
code = -1;
}
}
if ( options->RouterFile == NULL )
{
log(LOG_ERR,"RouterFile option required, but not found.");
code = -1;
}
if ( options->PrivateKeyFile == NULL )
{
log(LOG_ERR,"PrivateKeyFile option required, but not found.");
code = -1;
}
if ( options->ORPort < 1 )
{
log(LOG_ERR,"ORPort option required and must be a positive integer value.");
code = -1;
}
if ( options->OPPort < 1 )
{
log(LOG_ERR,"OPPort option required and must be a positive integer value.");
code = -1;
}
if ( options->APPort < 1 )
{
log(LOG_ERR,"APPort option required and must be a positive integer value.");
code = -1;
}
if ( options->CoinWeight < 0.0 || options->CoinWeight >= 1.0 )
{
log(LOG_ERR,"CoinWeight option must be a value from 0.0 upto 1.0, but not including 1.0.");
code = -1;
}
if ( options->MaxConn <= 0 )
{
log(LOG_ERR,"MaxConn option must be a non-zero positive integer.");
code = -1;
}
if ( options->TrafficShaping != 0 && options->TrafficShaping != 1 )
{
log(LOG_ERR,"TrafficShaping option must be either 0 or 1.");
code = -1;
}
if ( options->LinkPadding != 0 && options->LinkPadding != 1 )
{
log(LOG_ERR,"LinkPadding option must be either 0 or 1.");
code = -1;
}
if ( options->Role < 0 || options->Role > 15 )
{
log(LOG_ERR,"Role option must be an integer between 0 and 15 (inclusive).");
code = -1;
}
return code;
}
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