mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-11 13:43:47 +01:00
333 lines
9.7 KiB
C
333 lines
9.7 KiB
C
/* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
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/* See LICENSE for licensing information */
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/* $Id$ */
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#include "or.h"
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/* enumeration of types which option values can take */
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#define CONFIG_TYPE_STRING 0
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#define CONFIG_TYPE_CHAR 1
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#define CONFIG_TYPE_INT 2
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#define CONFIG_TYPE_LONG 3
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#define CONFIG_TYPE_DOUBLE 4
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#define CONFIG_TYPE_BOOL 5
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#define CONFIG_LINE_MAXLEN 4096
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struct config_line {
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char *key;
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char *value;
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struct config_line *next;
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};
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static FILE *config_open(const unsigned char *filename);
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static int config_close(FILE *f);
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static struct config_line *config_get_commandlines(int argc, char **argv);
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static struct config_line *config_get_lines(FILE *f);
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static void config_free_lines(struct config_line *front);
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static int config_compare(struct config_line *c, char *key, int type, void *arg);
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static void config_assign(or_options_t *options, struct config_line *list);
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/* open configuration file for reading */
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static FILE *config_open(const unsigned char *filename) {
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assert(filename);
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if (strspn(filename,CONFIG_LEGAL_FILENAME_CHARACTERS) != strlen(filename)) {
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/* filename has illegal letters */
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return NULL;
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}
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return fopen(filename, "r");
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}
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/* close configuration file */
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static int config_close(FILE *f) {
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assert(f);
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return fclose(f);
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}
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static struct config_line *config_get_commandlines(int argc, char **argv) {
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struct config_line *new;
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struct config_line *front = NULL;
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char *s;
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int i = 1;
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while(i < argc-1) {
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if(!strcmp(argv[i],"-f")) {
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// log(LOG_DEBUG,"Commandline: skipping over -f.");
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i+=2; /* this is the config file option. ignore it. */
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continue;
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}
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new = tor_malloc(sizeof(struct config_line));
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s = argv[i];
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while(*s == '-')
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s++;
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new->key = tor_strdup(s);
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new->value = tor_strdup(argv[i+1]);
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log(LOG_DEBUG,"Commandline: parsed keyword '%s', value '%s'",
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new->key, new->value);
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new->next = front;
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front = new;
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i += 2;
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}
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return front;
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}
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/* parse the config file and strdup into key/value strings. Return list,
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* or NULL if parsing the file failed.
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* Warn and ignore mangled lines. */
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static struct config_line *config_get_lines(FILE *f) {
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struct config_line *new;
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struct config_line *front = NULL;
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char line[CONFIG_LINE_MAXLEN];
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int result;
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char *key, *value;
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while( (result=parse_line_from_file(line,sizeof(line),f,&key,&value)) > 0) {
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new = tor_malloc(sizeof(struct config_line));
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new->key = tor_strdup(key);
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new->value = tor_strdup(value);
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new->next = front;
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front = new;
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}
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if(result < 0)
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return NULL;
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return front;
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}
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static void config_free_lines(struct config_line *front) {
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struct config_line *tmp;
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while(front) {
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tmp = front;
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front = tmp->next;
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free(tmp->key);
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free(tmp->value);
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free(tmp);
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}
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}
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static int config_compare(struct config_line *c, char *key, int type, void *arg) {
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int i;
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if(strncasecmp(c->key,key,strlen(c->key)))
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return 0;
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/* it's a match. cast and assign. */
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log_fn(LOG_DEBUG,"Recognized keyword '%s' as %s, using value '%s'.",c->key,key,c->value);
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switch(type) {
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case CONFIG_TYPE_INT:
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*(int *)arg = atoi(c->value);
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break;
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case CONFIG_TYPE_BOOL:
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i = atoi(c->value);
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if (i != 0 && i != 1) {
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log(LOG_WARNING, "Boolean keyword '%s' expects 0 or 1", c->key);
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return 0;
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}
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*(int *)arg = i;
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break;
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case CONFIG_TYPE_STRING:
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*(char **)arg = tor_strdup(c->value);
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break;
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case CONFIG_TYPE_DOUBLE:
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*(double *)arg = atof(c->value);
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break;
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}
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return 1;
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}
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static void config_assign(or_options_t *options, struct config_line *list) {
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/* iterate through list. for each item convert as appropriate and assign to 'options'. */
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while(list) {
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if(
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/* order matters here! abbreviated arguments use the first match. */
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/* string options */
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config_compare(list, "LogLevel", CONFIG_TYPE_STRING, &options->LogLevel) ||
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config_compare(list, "DataDirectory", CONFIG_TYPE_STRING, &options->DataDirectory) ||
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config_compare(list, "RouterFile", CONFIG_TYPE_STRING, &options->RouterFile) ||
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config_compare(list, "PidFile", CONFIG_TYPE_STRING, &options->PidFile) ||
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config_compare(list, "Nickname", CONFIG_TYPE_STRING, &options->Nickname) ||
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config_compare(list, "Address", CONFIG_TYPE_STRING, &options->Address) ||
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config_compare(list, "ExitPolicy", CONFIG_TYPE_STRING, &options->ExitPolicy) ||
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/* int options */
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config_compare(list, "MaxConn", CONFIG_TYPE_INT, &options->MaxConn) ||
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config_compare(list, "APPort", CONFIG_TYPE_INT, &options->APPort) ||
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config_compare(list, "ORPort", CONFIG_TYPE_INT, &options->ORPort) ||
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config_compare(list, "DirPort", CONFIG_TYPE_INT, &options->DirPort) ||
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config_compare(list, "DirFetchPostPeriod",CONFIG_TYPE_INT, &options->DirFetchPostPeriod) ||
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config_compare(list, "KeepalivePeriod", CONFIG_TYPE_INT, &options->KeepalivePeriod) ||
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config_compare(list, "MaxOnionsPending",CONFIG_TYPE_INT, &options->MaxOnionsPending) ||
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config_compare(list, "NewCircuitPeriod",CONFIG_TYPE_INT, &options->NewCircuitPeriod) ||
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config_compare(list, "TotalBandwidth", CONFIG_TYPE_INT, &options->TotalBandwidth) ||
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config_compare(list, "NumCpus", CONFIG_TYPE_INT, &options->NumCpus) ||
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config_compare(list, "OnionRouter", CONFIG_TYPE_BOOL, &options->OnionRouter) ||
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config_compare(list, "Daemon", CONFIG_TYPE_BOOL, &options->Daemon) ||
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config_compare(list, "TrafficShaping", CONFIG_TYPE_BOOL, &options->TrafficShaping) ||
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config_compare(list, "LinkPadding", CONFIG_TYPE_BOOL, &options->LinkPadding) ||
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config_compare(list, "IgnoreVersion", CONFIG_TYPE_BOOL, &options->IgnoreVersion) ||
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/* float options */
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config_compare(list, "CoinWeight", CONFIG_TYPE_DOUBLE, &options->CoinWeight)
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) {
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/* then we're ok. it matched something. */
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} else {
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log_fn(LOG_WARNING,"Ignoring unknown keyword '%s'.",list->key);
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}
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list = list->next;
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}
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}
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/* return 0 if success, <0 if failure. */
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int getconfig(int argc, char **argv, or_options_t *options) {
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struct config_line *cl;
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FILE *cf;
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char *fname;
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int i;
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int result = 0;
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/* give reasonable values for each option. Defaults to zero. */
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memset(options,0,sizeof(or_options_t));
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options->LogLevel = "info";
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options->ExitPolicy = "reject 127.0.0.1:*,reject 18.244.0.188:25,accept *:*";
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options->loglevel = LOG_DEBUG;
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options->PidFile = "tor.pid";
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options->DataDirectory = NULL;
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options->CoinWeight = 0.1;
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options->MaxConn = 900;
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options->DirFetchPostPeriod = 600;
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options->KeepalivePeriod = 300;
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options->MaxOnionsPending = 10;
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options->NewCircuitPeriod = 60; /* once a minute */
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options->TotalBandwidth = 800000; /* at most 800kB/s total sustained incoming */
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options->NumCpus = 1;
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/* learn config file name, get config lines, assign them */
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i = 1;
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while(i < argc-1 && strcmp(argv[i],"-f")) {
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i++;
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}
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if(i < argc-1) { /* we found one */
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fname = argv[i+1];
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} else { /* didn't find one, try /etc/torrc */
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fname = "/etc/torrc";
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}
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log(LOG_DEBUG,"Opening config file '%s'",fname);
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cf = config_open(fname);
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if(!cf) {
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log(LOG_WARNING, "Unable to open configuration file '%s'.",fname);
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return -1;
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}
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cl = config_get_lines(cf);
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if(!cl) return -1;
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config_assign(options,cl);
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config_free_lines(cl);
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config_close(cf);
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/* go through command-line variables too */
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cl = config_get_commandlines(argc,argv);
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config_assign(options,cl);
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config_free_lines(cl);
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/* Validate options */
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if(options->LogLevel) {
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if(!strcmp(options->LogLevel,"err"))
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options->loglevel = LOG_ERR;
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else if(!strncmp(options->LogLevel,"warn",4))
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options->loglevel = LOG_WARNING;
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else if(!strcmp(options->LogLevel,"info"))
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options->loglevel = LOG_INFO;
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else if(!strcmp(options->LogLevel,"debug"))
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options->loglevel = LOG_DEBUG;
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else {
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log(LOG_WARNING,"LogLevel must be one of err|warning|info|debug.");
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result = -1;
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}
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}
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if(options->RouterFile == NULL) {
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log(LOG_WARNING,"RouterFile option required, but not found.");
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result = -1;
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}
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if(options->ORPort < 0) {
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log(LOG_WARNING,"ORPort option can't be negative.");
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result = -1;
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}
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if(options->OnionRouter && options->ORPort == 0) {
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log(LOG_WARNING,"If OnionRouter is set, then ORPort must be positive.");
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result = -1;
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}
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if(options->OnionRouter && options->DataDirectory == NULL) {
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log(LOG_WARNING,"DataDirectory option required for OnionRouter, but not found.");
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result = -1;
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}
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if(options->OnionRouter && options->Nickname == NULL) {
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log_fn(LOG_WARNING,"Nickname required for OnionRouter, but not found.");
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result = -1;
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}
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if(options->APPort < 0) {
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log(LOG_WARNING,"APPort option can't be negative.");
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result = -1;
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}
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if(options->DirPort < 0) {
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log(LOG_WARNING,"DirPort option can't be negative.");
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result = -1;
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}
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if(options->APPort > 1 &&
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(options->CoinWeight < 0.0 || options->CoinWeight >= 1.0)) {
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log(LOG_WARNING,"CoinWeight option must be >=0.0 and <1.0.");
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result = -1;
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}
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if(options->MaxConn < 1) {
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log(LOG_WARNING,"MaxConn option must be a non-zero positive integer.");
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result = -1;
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}
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if(options->MaxConn >= MAXCONNECTIONS) {
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log(LOG_WARNING,"MaxConn option must be less than %d.", MAXCONNECTIONS);
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result = -1;
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}
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if(options->DirFetchPostPeriod < 1) {
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log(LOG_WARNING,"DirFetchPostPeriod option must be positive.");
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result = -1;
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}
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if(options->KeepalivePeriod < 1) {
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log(LOG_WARNING,"KeepalivePeriod option must be positive.");
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result = -1;
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}
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return result;
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}
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/*
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Local Variables:
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mode:c
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indent-tabs-mode:nil
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c-basic-offset:2
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End:
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*/
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