/* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */ /* See LICENSE for licensing information */ /* $Id$ */ #include "or.h" /* enumeration of types which option values can take */ #define CONFIG_TYPE_STRING 0 #define CONFIG_TYPE_CHAR 1 #define CONFIG_TYPE_INT 2 #define CONFIG_TYPE_LONG 3 #define CONFIG_TYPE_DOUBLE 4 #define CONFIG_TYPE_BOOL 5 #define CONFIG_LINE_MAXLEN 4096 struct config_line { char *key; char *value; struct config_line *next; }; static FILE *config_open(const unsigned char *filename); static int config_close(FILE *f); static struct config_line *config_get_commandlines(int argc, char **argv); static struct config_line *config_get_lines(FILE *f); static void config_free_lines(struct config_line *front); static int config_compare(struct config_line *c, char *key, int type, void *arg); static void config_assign(or_options_t *options, struct config_line *list); /* open configuration file for reading */ static FILE *config_open(const unsigned char *filename) { assert(filename); if (strspn(filename,CONFIG_LEGAL_FILENAME_CHARACTERS) != strlen(filename)) { /* filename has illegal letters */ return NULL; } return fopen(filename, "r"); } /* close configuration file */ static int config_close(FILE *f) { assert(f); return fclose(f); } static struct config_line *config_get_commandlines(int argc, char **argv) { struct config_line *new; struct config_line *front = NULL; char *s; int i = 1; while(i < argc-1) { if(!strcmp(argv[i],"-f")) { // log(LOG_DEBUG,"Commandline: skipping over -f."); i+=2; /* this is the config file option. ignore it. */ continue; } new = tor_malloc(sizeof(struct config_line)); s = argv[i]; while(*s == '-') s++; new->key = tor_strdup(s); new->value = tor_strdup(argv[i+1]); log(LOG_DEBUG,"Commandline: parsed keyword '%s', value '%s'", new->key, new->value); new->next = front; front = new; i += 2; } return front; } /* parse the config file and strdup into key/value strings. Return list, * or NULL if parsing the file failed. * Warn and ignore mangled lines. */ static struct config_line *config_get_lines(FILE *f) { struct config_line *new; struct config_line *front = NULL; char line[CONFIG_LINE_MAXLEN]; int result; char *key, *value; while( (result=parse_line_from_file(line,sizeof(line),f,&key,&value)) > 0) { new = tor_malloc(sizeof(struct config_line)); new->key = tor_strdup(key); new->value = tor_strdup(value); new->next = front; front = new; } if(result < 0) return NULL; return front; } static void config_free_lines(struct config_line *front) { struct config_line *tmp; while(front) { tmp = front; front = tmp->next; free(tmp->key); free(tmp->value); free(tmp); } } static int config_compare(struct config_line *c, char *key, int type, void *arg) { int i; if(strncasecmp(c->key,key,strlen(c->key))) return 0; /* it's a match. cast and assign. */ log_fn(LOG_DEBUG,"Recognized keyword '%s' as %s, using value '%s'.",c->key,key,c->value); switch(type) { case CONFIG_TYPE_INT: *(int *)arg = atoi(c->value); break; case CONFIG_TYPE_BOOL: i = atoi(c->value); if (i != 0 && i != 1) { log(LOG_WARN, "Boolean keyword '%s' expects 0 or 1", c->key); return 0; } *(int *)arg = i; break; case CONFIG_TYPE_STRING: *(char **)arg = tor_strdup(c->value); break; case CONFIG_TYPE_DOUBLE: *(double *)arg = atof(c->value); break; } return 1; } static void config_assign(or_options_t *options, struct config_line *list) { /* iterate through list. for each item convert as appropriate and assign to 'options'. */ while(list) { if( /* order matters here! abbreviated arguments use the first match. */ /* string options */ config_compare(list, "LogLevel", CONFIG_TYPE_STRING, &options->LogLevel) || config_compare(list, "DataDirectory", CONFIG_TYPE_STRING, &options->DataDirectory) || config_compare(list, "RouterFile", CONFIG_TYPE_STRING, &options->RouterFile) || config_compare(list, "PidFile", CONFIG_TYPE_STRING, &options->PidFile) || config_compare(list, "Nickname", CONFIG_TYPE_STRING, &options->Nickname) || config_compare(list, "Address", CONFIG_TYPE_STRING, &options->Address) || config_compare(list, "ExitPolicy", CONFIG_TYPE_STRING, &options->ExitPolicy) || /* int options */ config_compare(list, "MaxConn", CONFIG_TYPE_INT, &options->MaxConn) || config_compare(list, "APPort", CONFIG_TYPE_INT, &options->APPort) || config_compare(list, "ORPort", CONFIG_TYPE_INT, &options->ORPort) || config_compare(list, "DirPort", CONFIG_TYPE_INT, &options->DirPort) || config_compare(list, "DirFetchPostPeriod",CONFIG_TYPE_INT, &options->DirFetchPostPeriod) || config_compare(list, "KeepalivePeriod", CONFIG_TYPE_INT, &options->KeepalivePeriod) || config_compare(list, "MaxOnionsPending",CONFIG_TYPE_INT, &options->MaxOnionsPending) || config_compare(list, "NewCircuitPeriod",CONFIG_TYPE_INT, &options->NewCircuitPeriod) || config_compare(list, "TotalBandwidth", CONFIG_TYPE_INT, &options->TotalBandwidth) || config_compare(list, "NumCpus", CONFIG_TYPE_INT, &options->NumCpus) || config_compare(list, "OnionRouter", CONFIG_TYPE_BOOL, &options->OnionRouter) || config_compare(list, "Daemon", CONFIG_TYPE_BOOL, &options->Daemon) || config_compare(list, "TrafficShaping", CONFIG_TYPE_BOOL, &options->TrafficShaping) || config_compare(list, "LinkPadding", CONFIG_TYPE_BOOL, &options->LinkPadding) || config_compare(list, "IgnoreVersion", CONFIG_TYPE_BOOL, &options->IgnoreVersion) || /* float options */ config_compare(list, "CoinWeight", CONFIG_TYPE_DOUBLE, &options->CoinWeight) ) { /* then we're ok. it matched something. */ } else { log_fn(LOG_WARN,"Ignoring unknown keyword '%s'.",list->key); } list = list->next; } } /* return 0 if success, <0 if failure. */ int getconfig(int argc, char **argv, or_options_t *options) { struct config_line *cl; FILE *cf; char *fname; int i; int result = 0; /* give reasonable values for each option. Defaults to zero. */ memset(options,0,sizeof(or_options_t)); options->LogLevel = "info"; options->ExitPolicy = "reject 127.0.0.1:*,reject 18.244.0.188:25,accept *:*"; options->loglevel = LOG_DEBUG; options->PidFile = "tor.pid"; options->DataDirectory = NULL; options->CoinWeight = 0.1; options->MaxConn = 900; options->DirFetchPostPeriod = 600; options->KeepalivePeriod = 300; options->MaxOnionsPending = 10; options->NewCircuitPeriod = 60; /* once a minute */ options->TotalBandwidth = 800000; /* at most 800kB/s total sustained incoming */ options->NumCpus = 1; /* learn config file name, get config lines, assign them */ i = 1; while(i < argc-1 && strcmp(argv[i],"-f")) { i++; } if(i < argc-1) { /* we found one */ fname = argv[i+1]; } else { /* didn't find one, try CONFDIR */ fname = CONFDIR "/torrc"; } log(LOG_DEBUG,"Opening config file '%s'",fname); cf = config_open(fname); if(!cf) { log(LOG_WARN, "Unable to open configuration file '%s'.",fname); return -1; } cl = config_get_lines(cf); if(!cl) return -1; config_assign(options,cl); config_free_lines(cl); config_close(cf); /* go through command-line variables too */ cl = config_get_commandlines(argc,argv); config_assign(options,cl); config_free_lines(cl); /* Validate options */ if(options->LogLevel) { if(!strcmp(options->LogLevel,"err")) options->loglevel = LOG_ERR; else if(!strcmp(options->LogLevel,"warn")) options->loglevel = LOG_WARN; else if(!strcmp(options->LogLevel,"info")) options->loglevel = LOG_INFO; else if(!strcmp(options->LogLevel,"debug")) options->loglevel = LOG_DEBUG; else { log(LOG_WARN,"LogLevel must be one of err|warn|info|debug."); result = -1; } } if(options->RouterFile == NULL) { log(LOG_WARN,"RouterFile option required, but not found."); result = -1; } if(options->ORPort < 0) { log(LOG_WARN,"ORPort option can't be negative."); result = -1; } if(options->OnionRouter && options->ORPort == 0) { log(LOG_WARN,"If OnionRouter is set, then ORPort must be positive."); result = -1; } if(options->OnionRouter && options->DataDirectory == NULL) { log(LOG_WARN,"DataDirectory option required for OnionRouter, but not found."); result = -1; } if(options->OnionRouter && options->Nickname == NULL) { log_fn(LOG_WARN,"Nickname required for OnionRouter, but not found."); result = -1; } if(options->APPort < 0) { log(LOG_WARN,"APPort option can't be negative."); result = -1; } if(options->DirPort < 0) { log(LOG_WARN,"DirPort option can't be negative."); result = -1; } if(options->APPort > 1 && (options->CoinWeight < 0.0 || options->CoinWeight >= 1.0)) { log(LOG_WARN,"CoinWeight option must be >=0.0 and <1.0."); result = -1; } if(options->MaxConn < 1) { log(LOG_WARN,"MaxConn option must be a non-zero positive integer."); result = -1; } if(options->MaxConn >= MAXCONNECTIONS) { log(LOG_WARN,"MaxConn option must be less than %d.", MAXCONNECTIONS); result = -1; } if(options->DirFetchPostPeriod < 1) { log(LOG_WARN,"DirFetchPostPeriod option must be positive."); result = -1; } if(options->KeepalivePeriod < 1) { log(LOG_WARN,"KeepalivePeriod option must be positive."); result = -1; } return result; } /* Local Variables: mode:c indent-tabs-mode:nil c-basic-offset:2 End: */