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0a6e27208b
tor/src/or/config.c
Roger Dingledine 0a6e27208b o Handle servers with dynamic IP addresses: don't replace 
options->Address with the resolved one at startup.
  o detect our address right before we make a routerinfo each time.
o external IP vs bind-IP. Already done, just use options->Address.
o OutboundBindAddress config option, to bind to a specific
  IP address for outgoing connect()s.


svn:r2241
2004-08-16 11:43:18 +00:00

988 lines
31 KiB
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/* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
/* See LICENSE for licensing information */
/* $Id$ */
/**
* /file config.c
*
* /brief Code to parse and interpret configuration files.
*
**/
#include "or.h"
/** Enumeration of types which option values can take */
typedef enum config_type_t {
CONFIG_TYPE_STRING = 0, /**< An arbitrary string. */
CONFIG_TYPE_INT, /**< An integer */
CONFIG_TYPE_DOUBLE, /**< A floating-point value */
CONFIG_TYPE_BOOL, /**< A boolean value, expressed as 0 or 1. */
CONFIG_TYPE_LINELIST, /**< Uninterpreted config lines */
} config_type_t;
/** Largest allowed config line */
#define CONFIG_LINE_T_MAXLEN 4096
static FILE *config_open(const unsigned char *filename);
static int config_close(FILE *f);
static struct config_line_t *config_get_commandlines(int argc, char **argv);
static struct config_line_t *config_get_lines(FILE *f);
static void config_free_lines(struct config_line_t *front);
static int config_compare(struct config_line_t *c, const char *key, config_type_t type, void *arg);
static int config_assign(or_options_t *options, struct config_line_t *list);
/** Open a configuration file for reading */
static FILE *config_open(const unsigned char *filename) {
tor_assert(filename);
if (strspn(filename,CONFIG_LEGAL_FILENAME_CHARACTERS) != strlen(filename)) {
/* filename has illegal letters */
return NULL;
}
return fopen(filename, "r");
}
/** Close the configuration file */
static int config_close(FILE *f) {
tor_assert(f);
return fclose(f);
}
/** Helper: Read a list of configuration options from the command line. */
static struct config_line_t *config_get_commandlines(int argc, char **argv) {
struct config_line_t *new;
struct config_line_t *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_t));
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;
}
/** Helper: allocate a new configuration option mapping 'key' to 'val',
* prepend it to 'front', and return the newly allocated config_line_t */
static struct config_line_t *
config_line_prepend(struct config_line_t *front,
const char *key,
const char *val)
{
struct config_line_t *newline;
newline = tor_malloc(sizeof(struct config_line_t));
newline->key = tor_strdup(key);
newline->value = tor_strdup(val);
newline->next = front;
return newline;
}
/** Helper: parse the config file and strdup into key/value
* strings. Return list, or NULL if parsing the file failed. Warn and
* ignore any misformatted lines. */
static struct config_line_t *config_get_lines(FILE *f) {
struct config_line_t *front = NULL;
char line[CONFIG_LINE_T_MAXLEN];
int result;
char *key, *value;
while( (result=parse_line_from_file(line,sizeof(line),f,&key,&value)) > 0) {
front = config_line_prepend(front, key, value);
}
if(result < 0)
return NULL;
return front;
}
/**
* Free all the configuration lines on the linked list <b>front</b>.
*/
static void config_free_lines(struct config_line_t *front) {
struct config_line_t *tmp;
while(front) {
tmp = front;
front = tmp->next;
free(tmp->key);
free(tmp->value);
free(tmp);
}
}
/** Search the linked list <b>c</b> for any option whose key is <b>key</b>.
* If such an option is found, interpret it as of type <b>type</b>, and store
* the result in <b>arg</b>. If the option is misformatted, log a warning and
* skip it.
*/
static int config_compare(struct config_line_t *c, const char *key, config_type_t type, void *arg) {
int i;
if(strncasecmp(c->key,key,strlen(c->key)))
return 0;
if(strcasecmp(c->key,key)) {
tor_free(c->key);
c->key = tor_strdup(key);
}
/* 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:
tor_free(*(char **)arg);
*(char **)arg = tor_strdup(c->value);
break;
case CONFIG_TYPE_DOUBLE:
*(double *)arg = atof(c->value);
break;
case CONFIG_TYPE_LINELIST:
/* Note: this reverses the order that the lines appear in. That's
* just fine, since we build up the list of lines reversed in the
* first place. */
*(struct config_line_t**)arg =
config_line_prepend(*(struct config_line_t**)arg, c->key, c->value);
break;
}
return 1;
}
/** Iterate through the linked list of options <b>list</b>.
* For each item, convert as appropriate and assign to <b>options</b>.
* If an item is unrecognized, return -1 immediately,
* else return 0 for success. */
static int config_assign(or_options_t *options, struct config_line_t *list) {
while(list) {
if(
/* order matters here! abbreviated arguments use the first match. */
/* string options */
config_compare(list, "Address", CONFIG_TYPE_STRING, &options->Address) ||
config_compare(list, "AuthoritativeDirectory",CONFIG_TYPE_BOOL, &options->AuthoritativeDir) ||
config_compare(list, "BandwidthRate", CONFIG_TYPE_INT, &options->BandwidthRate) ||
config_compare(list, "BandwidthBurst", CONFIG_TYPE_INT, &options->BandwidthBurst) ||
config_compare(list, "ClientOnly", CONFIG_TYPE_BOOL, &options->ClientOnly) ||
config_compare(list, "ContactInfo", CONFIG_TYPE_STRING, &options->ContactInfo) ||
config_compare(list, "DebugLogFile", CONFIG_TYPE_STRING, &options->DebugLogFile) ||
config_compare(list, "DataDirectory", CONFIG_TYPE_STRING, &options->DataDirectory) ||
config_compare(list, "DirPort", CONFIG_TYPE_INT, &options->DirPort) ||
config_compare(list, "DirBindAddress", CONFIG_TYPE_LINELIST, &options->DirBindAddress) ||
config_compare(list, "DirFetchPostPeriod",CONFIG_TYPE_INT, &options->DirFetchPostPeriod) ||
config_compare(list, "ExitNodes", CONFIG_TYPE_STRING, &options->ExitNodes) ||
config_compare(list, "EntryNodes", CONFIG_TYPE_STRING, &options->EntryNodes) ||
config_compare(list, "StrictExitNodes", CONFIG_TYPE_BOOL, &options->StrictExitNodes) ||
config_compare(list, "StrictEntryNodes", CONFIG_TYPE_BOOL, &options->StrictEntryNodes) ||
config_compare(list, "ExitPolicy", CONFIG_TYPE_LINELIST, &options->ExitPolicy) ||
config_compare(list, "ExcludeNodes", CONFIG_TYPE_STRING, &options->ExcludeNodes) ||
config_compare(list, "FascistFirewall",CONFIG_TYPE_BOOL, &options->FascistFirewall) ||
config_compare(list, "Group", CONFIG_TYPE_STRING, &options->Group) ||
config_compare(list, "HiddenServiceDir", CONFIG_TYPE_LINELIST, &options->RendConfigLines)||
config_compare(list, "HiddenServicePort", CONFIG_TYPE_LINELIST, &options->RendConfigLines)||
config_compare(list, "HiddenServiceNodes", CONFIG_TYPE_LINELIST, &options->RendConfigLines)||
config_compare(list, "HiddenServiceExcludeNodes", CONFIG_TYPE_LINELIST, &options->RendConfigLines)||
config_compare(list, "IgnoreVersion", CONFIG_TYPE_BOOL, &options->IgnoreVersion) ||
config_compare(list, "KeepalivePeriod",CONFIG_TYPE_INT, &options->KeepalivePeriod) ||
config_compare(list, "LogLevel", CONFIG_TYPE_LINELIST, &options->LogOptions) ||
config_compare(list, "LogFile", CONFIG_TYPE_LINELIST, &options->LogOptions) ||
config_compare(list, "LinkPadding", CONFIG_TYPE_BOOL, &options->LinkPadding) ||
config_compare(list, "MaxConn", CONFIG_TYPE_INT, &options->MaxConn) ||
config_compare(list, "MaxOnionsPending",CONFIG_TYPE_INT, &options->MaxOnionsPending) ||
config_compare(list, "Nickname", CONFIG_TYPE_STRING, &options->Nickname) ||
config_compare(list, "NewCircuitPeriod",CONFIG_TYPE_INT, &options->NewCircuitPeriod) ||
config_compare(list, "NumCpus", CONFIG_TYPE_INT, &options->NumCpus) ||
config_compare(list, "ORPort", CONFIG_TYPE_INT, &options->ORPort) ||
config_compare(list, "ORBindAddress", CONFIG_TYPE_LINELIST, &options->ORBindAddress) ||
config_compare(list, "OutboundBindAddress",CONFIG_TYPE_STRING, &options->OutboundBindAddress) ||
config_compare(list, "PidFile", CONFIG_TYPE_STRING, &options->PidFile) ||
config_compare(list, "PathlenCoinWeight",CONFIG_TYPE_DOUBLE, &options->PathlenCoinWeight) ||
config_compare(list, "RouterFile", CONFIG_TYPE_STRING, &options->RouterFile) ||
config_compare(list, "RunAsDaemon", CONFIG_TYPE_BOOL, &options->RunAsDaemon) ||
config_compare(list, "RunTesting", CONFIG_TYPE_BOOL, &options->RunTesting) ||
config_compare(list, "RecommendedVersions",CONFIG_TYPE_STRING, &options->RecommendedVersions) ||
config_compare(list, "RendNodes", CONFIG_TYPE_STRING, &options->RendNodes) ||
config_compare(list, "RendExcludeNodes",CONFIG_TYPE_STRING, &options->RendExcludeNodes) ||
config_compare(list, "SocksPort", CONFIG_TYPE_INT, &options->SocksPort) ||
config_compare(list, "SocksBindAddress",CONFIG_TYPE_LINELIST,&options->SocksBindAddress) ||
config_compare(list, "SocksPolicy", CONFIG_TYPE_LINELIST,&options->SocksPolicy) ||
config_compare(list, "TrafficShaping", CONFIG_TYPE_BOOL, &options->TrafficShaping) ||
config_compare(list, "User", CONFIG_TYPE_STRING, &options->User)
) {
/* then we're ok. it matched something. */
} else {
log_fn(LOG_WARN,"Unknown keyword '%s'. Failing.",list->key);
return -1;
}
list = list->next;
}
return 0;
}
const char default_dirservers_string[] =
"router moria1 18.244.0.188 9001 9021 9031\n"
"platform Tor 0.0.6rc1 on Linux moria.mit.edu i686\n"
"published 2004-04-25 21:54:28\n"
"bandwidth 800000 10000000\n"
"onion-key\n"
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIGJAoGBANoIvHieyHUTzIacbnWOnyTyzGrLOdXqbcjz2GGMxyHEd5K1bO1ZBNHP\n"
"9i5qLQpN5viFk2K2rEGuG8tFgDEzSWZEtBqv3NVfUdiumdERWMBwlaQ0MVK4C+jf\n"
"y5gZ8KI3o9ZictgPS1AQF+Kk932/vIHTuRIUKb4ILTnQilNvID0NAgMBAAE=\n"
"-----END RSA PUBLIC KEY-----\n"
"signing-key\n"
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIGJAoGBAMHa0ZC/jo2Q2DrwKYF/6ZbmZ27PFYG91u4gUzzmZ/VXLpZ8wNzEV3oW\n"
"nt+I61048fBiC1frT1/DZ351n2bLSk9zJbB6jyGZJn0380FPRX3+cXyXS0Gq8Ril\n"
"xkhMQf5XuNFUb8UmYPSOH4WErjvYjKvU+gfjbK/82Jo9SuHpYz+BAgMBAAE=\n"
"-----END RSA PUBLIC KEY-----\n"
"reject 0.0.0.0/255.0.0.0:*\n"
"reject 169.254.0.0/255.255.0.0:*\n"
"reject 127.0.0.0/255.0.0.0:*\n"
"reject 192.168.0.0/255.255.0.0:*\n"
"reject 10.0.0.0/255.0.0.0:*\n"
"reject 172.16.0.0/255.240.0.0:*\n"
"accept *:20-22\n"
"accept *:53\n"
"accept *:79-80\n"
"accept *:110\n"
"accept *:143\n"
"accept *:443\n"
"accept *:873\n"
"accept *:993\n"
"accept *:995\n"
"accept *:1024-65535\n"
"reject *:*\n"
"router-signature\n"
"-----BEGIN SIGNATURE-----\n"
"o1eAoRHDAEAXsnh5wN++vIwrupd+DbAJ2p3wxHDrmqxTpygzxxCnyQyhMfX03ua2\n"
"4iplyNlwyFwzWcw0sk31otlO2HBYXT1V9G0YxGtKMOeOBMHjfGbUjGvEALHzWi4z\n"
"8DXGJp13zgnUyP4ZA6xaGROwcT6oB5e7UlztvvpGxTg=\n"
"-----END SIGNATURE-----\n"
"\n"
"router moria2 18.244.0.188 9002 9022 9032\n"
"platform Tor 0.0.6rc1 on Linux moria.mit.edu i686\n"
"published 2004-04-25 21:54:30\n"
"bandwidth 800000 10000000\n"
"onion-key\n"
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIGJAoGBAM4Cc/npgYC54XrYLC+grVxJp7PDmNO2DRRJOxKttBBtvLpnR1UaueTi\n"
"kyknT5kmlx+ihgZF/jmye//2dDUp2+kK/kSkpRV4xnDLXZmed+sNSQxqmm9TtZQ9\n"
"/hjpxhp5J9HmUTYhntBs+4E4CUKokmrI6oRLoln4SA39AX9QLPcnAgMBAAE=\n"
"-----END RSA PUBLIC KEY-----\n"
"signing-key\n"
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIGJAoGBAOcrht/y5rkaahfX7sMe2qnpqoPibsjTSJaDvsUtaNP/Bq0MgNDGOR48\n"
"rtwfqTRff275Edkp/UYw3G3vSgKCJr76/bqOHCmkiZrnPV1zxNfrK18gNw2Cxre0\n"
"nTA+fD8JQqpPtb8b0SnG9kwy75eS//sRu7TErie2PzGMxrf9LH0LAgMBAAE=\n"
"-----END RSA PUBLIC KEY-----\n"
"reject 0.0.0.0/255.0.0.0:*\n"
"reject 169.254.0.0/255.255.0.0:*\n"
"reject 127.0.0.0/255.0.0.0:*\n"
"reject 192.168.0.0/255.255.0.0:*\n"
"reject 10.0.0.0/255.0.0.0:*\n"
"reject 172.16.0.0/255.240.0.0:*\n"
"accept *:20-22\n"
"accept *:53\n"
"accept *:79-80\n"
"accept *:110\n"
"accept *:143\n"
"accept *:443\n"
"accept *:873\n"
"accept *:993\n"
"accept *:995\n"
"accept *:1024-65535\n"
"reject *:*\n"
"router-signature\n"
"-----BEGIN SIGNATURE-----\n"
"RKROLwP1ExjTZeg6wuN0pzYqed9IJUd5lAe9hp4ritbnmJAgS6qfww6jgx61CfUR\n"
"6SElhOLE7Q77jAdoL45Ji5pn/Y+Q+E+5lJm1E/ed9ha+YsOPaOc7z6GQ7E4mihCL\n"
"gI1vsw92+P1Ty4RHj6fyD9DhbV19nh2Qs+pvGJOS2FY=\n"
"-----END SIGNATURE-----\n"
"\n"
"router tor26 62.116.124.106 9001 9050 9030\n"
"platform Tor 0.0.6 on Linux seppia i686\n"
"published 2004-05-06 21:33:23\n"
"bandwidth 500000 10000000\n"
"onion-key\n"
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIGJAoGBAMEHdDnpj3ik1AF1xe/VqjoguH2DbANifYqXXfempu0fS+tU9FGo6dU/\n"
"fnVHAZwL9Ek9k2rMzumShi1RduK9p035R/Gk+PBBcLfvwYJ/Nat+ZO/L8jn/3bZe\n"
"ieQd9CKj2LjNGKpRNry37vkwMGIOIlegwK+2us8aXJ7sIvlNts0TAgMBAAE=\n"
"-----END RSA PUBLIC KEY-----\n"
"signing-key\n"
"-----BEGIN RSA PUBLIC KEY-----\n"
"MIGJAoGBAMQgV2gXLbXgesWgeAsj8P1Uvm/zibrFXqwDq27lLKNgWGYGX2ax3LyT\n"
"3nzI1Y5oLs4kPKTsMM5ft9aokwf417lKoCRlZc9ptfRbgxDx90c9GtWVmkrmDvCK\n"
"ae59TMoXIiGfZiwWT6KKq5Zm9/Fu2Il3B2vHGkKJYKixmiBJRKp/AgMBAAE=\n"
"-----END RSA PUBLIC KEY-----\n"
"accept 62.245.184.24:25\n"
"accept 62.116.124.106:6666-6670\n"
"accept *:48099\n"
"reject *:*\n"
"router-signature\n"
"-----BEGIN SIGNATURE-----\n"
"qh/xRoqfLNFzPaB8VdpbdMAwRyuk5qjx4LeLVQ2pDwTZ55PqmG99+VKUNte2WTTD\n"
"7dZEA7um2rueohGe4nYmvbhJWr20/I0ZxmWDRDvFy0b5nwzDMGvLvDw95Zu/XJQ2\n"
"md32NE3y9VZCfbCN+GlvETX3fdR3Svzcm8Kzesg2/s4=\n"
"-----END SIGNATURE-----\n"
;
int config_assign_default_dirservers(void) {
if(router_load_routerlist_from_string(default_dirservers_string, 1) < 0) {
log_fn(LOG_WARN,"Bug: the default dirservers internal string is corrupt.");
return -1;
}
return 0;
}
/** Set <b>options</b> to a reasonable default.
*
* Call this function when we can't find any torrc config file.
*/
static int config_assign_defaults(or_options_t *options) {
/* set them up as a client only */
options->SocksPort = 9050;
config_free_lines(options->ExitPolicy);
options->ExitPolicy = config_line_prepend(NULL, "ExitPolicy", "reject *:*");
/* plus give them a dirservers file */
if(config_assign_default_dirservers() < 0)
return -1;
return 0;
}
/** Print a usage message for tor. */
static void print_usage(void) {
printf("tor -f <torrc> [args]\n"
"See man page for more options. This -h is probably obsolete.\n\n"
"-b <bandwidth>\t\tbytes/second rate limiting\n"
"-d <file>\t\tDebug file\n"
// "-m <max>\t\tMax number of connections\n"
"-l <level>\t\tLog level\n"
"-r <file>\t\tList of known routers\n");
printf("\nClient options:\n"
"-e \"nick1 nick2 ...\"\t\tExit nodes\n"
"-s <IP>\t\t\tPort to bind to for Socks\n"
);
printf("\nServer options:\n"
"-n <nick>\t\tNickname of router\n"
"-o <port>\t\tOR port to bind to\n"
"-p <file>\t\tPID file\n"
);
}
/**
* Adjust <b>options</b> to contain a reasonable value for Address.
*/
int resolve_my_address(const char *address, uint32_t *addr) {
struct in_addr in;
struct hostent *rent;
char hostname[256];
int explicit_ip=1;
tor_assert(addr);
if(address) {
strlcpy(hostname,address,sizeof(hostname));
} else { /* then we need to guess our address */
explicit_ip = 0; /* it's implicit */
if(gethostname(hostname,sizeof(hostname)) < 0) {
log_fn(LOG_WARN,"Error obtaining local hostname");
return -1;
}
log_fn(LOG_DEBUG,"Guessed local host name as '%s'",hostname);
}
/* now we know hostname. resolve it and keep only the IP */
if(tor_inet_aton(hostname, &in) == 0) {
/* then we have to resolve it */
explicit_ip = 0;
rent = (struct hostent *)gethostbyname(hostname);
if (!rent) {
log_fn(LOG_WARN,"Could not resolve local Address %s. Failing.", hostname);
return -1;
}
tor_assert(rent->h_length == 4);
memcpy(&in.s_addr, rent->h_addr,rent->h_length);
}
if(!explicit_ip && is_internal_IP(htonl(in.s_addr))) {
log_fn(LOG_WARN,"Address '%s' resolves to private IP '%s'. "
"Please set the Address config option to be the IP you want to use.",
hostname, inet_ntoa(in));
return -1;
}
log_fn(LOG_DEBUG,"Resolved Address to %s.", inet_ntoa(in));
*addr = ntohl(in.s_addr);
return 0;
}
static char *get_default_nickname(void)
{
char localhostname[256];
char *cp, *out, *outp;
if(gethostname(localhostname,sizeof(localhostname)) < 0) {
log_fn(LOG_WARN,"Error obtaining local hostname");
return NULL;
}
/* Put it in lowercase; stop at the first dot. */
for(cp = localhostname; *cp; ++cp) {
if (*cp == '.') {
*cp = '\0';
break;
}
*cp = tolower(*cp);
}
/* Strip invalid characters. */
cp = localhostname;
out = outp = tor_malloc(strlen(localhostname)+1);
while (*cp) {
if (strchr(LEGAL_NICKNAME_CHARACTERS, *cp))
*outp++ = *cp++;
else
cp++;
}
*outp = '\0';
/* Enforce length. */
if (strlen(out) > MAX_NICKNAME_LEN)
out[MAX_NICKNAME_LEN]='\0';
return out;
}
/** Release storage held by <b>options</b> */
static void free_options(or_options_t *options) {
config_free_lines(options->LogOptions);
tor_free(options->ContactInfo);
tor_free(options->DebugLogFile);
tor_free(options->DataDirectory);
tor_free(options->RouterFile);
tor_free(options->Nickname);
tor_free(options->Address);
tor_free(options->PidFile);
tor_free(options->ExitNodes);
tor_free(options->EntryNodes);
tor_free(options->ExcludeNodes);
tor_free(options->RendNodes);
tor_free(options->RendExcludeNodes);
tor_free(options->OutboundBindAddress);
tor_free(options->RecommendedVersions);
tor_free(options->User);
tor_free(options->Group);
config_free_lines(options->RendConfigLines);
config_free_lines(options->SocksBindAddress);
config_free_lines(options->ORBindAddress);
config_free_lines(options->DirBindAddress);
config_free_lines(options->ExitPolicy);
config_free_lines(options->SocksPolicy);
}
/** Set <b>options</b> to hold reasonable defaults for most options. */
static void init_options(or_options_t *options) {
/* give reasonable values for each option. Defaults to zero. */
memset(options,0,sizeof(or_options_t));
options->LogOptions = NULL;
options->ExitNodes = tor_strdup("");
options->EntryNodes = tor_strdup("");
options->StrictEntryNodes = options->StrictExitNodes = 0;
options->ExcludeNodes = tor_strdup("");
options->RendNodes = tor_strdup("");
options->RendExcludeNodes = tor_strdup("");
options->ExitPolicy = NULL;
options->SocksPolicy = NULL;
options->SocksBindAddress = NULL;
options->ORBindAddress = NULL;
options->DirBindAddress = NULL;
options->OutboundBindAddress = NULL;
options->RecommendedVersions = NULL;
options->PidFile = NULL; // tor_strdup("tor.pid");
options->DataDirectory = NULL;
options->PathlenCoinWeight = 0.3;
options->MaxConn = 900;
options->DirFetchPostPeriod = 600;
options->KeepalivePeriod = 300;
options->MaxOnionsPending = 100;
options->NewCircuitPeriod = 30; /* twice a minute */
options->BandwidthRate = 800000; /* at most 800kB/s total sustained incoming */
options->BandwidthBurst = 10000000; /* max burst on the token bucket */
options->NumCpus = 1;
options->RendConfigLines = NULL;
}
/** Read a configuration file into <b>options</b>, finding the configuration
* file location based on the command line. After loading the options,
* validate them for consistency. Return 0 if success, <0 if failure. */
int getconfig(int argc, char **argv, or_options_t *options) {
struct config_line_t *cl;
FILE *cf;
char *fname;
int i;
int result = 0;
static int first_load = 1;
static char **backup_argv;
static int backup_argc;
char *previous_pidfile = NULL;
int previous_runasdaemon = 0;
int previous_orport = -1;
int using_default_torrc;
if(first_load) { /* first time we're called. save commandline args */
backup_argv = argv;
backup_argc = argc;
first_load = 0;
} else { /* we're reloading. need to clean up old ones first. */
argv = backup_argv;
argc = backup_argc;
/* record some previous values, so we can fail if they change */
if(options->PidFile)
previous_pidfile = tor_strdup(options->PidFile);
previous_runasdaemon = options->RunAsDaemon;
previous_orport = options->ORPort;
free_options(options);
}
init_options(options);
if(argc > 1 && (!strcmp(argv[1], "-h") || !strcmp(argv[1],"--help"))) {
print_usage();
exit(0);
}
if(argc > 1 && (!strcmp(argv[1],"--version"))) {
printf("Tor version %s.\n",VERSION);
exit(0);
}
/* 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 = tor_strdup(argv[i+1]);
using_default_torrc = 0;
} else if (file_status(CONFDIR "/torrc")==FN_FILE) {
/* didn't find one, try CONFDIR */
fname = tor_strdup(CONFDIR "/torrc");
using_default_torrc = 1;
} else {
char *fn = expand_filename("~/.torrc");
if (file_status(fn)==FN_FILE) {
fname = fn;
} else {
tor_free(fn);
fname = tor_strdup(CONFDIR "/torrc");
}
using_default_torrc = 1;
}
log(LOG_DEBUG,"Opening config file '%s'",fname);
cf = config_open(fname);
if(!cf) {
if(using_default_torrc == 1) {
log(LOG_NOTICE, "Configuration file '%s' not present, using reasonable defaults.",fname);
tor_free(fname);
if(config_assign_defaults(options) < 0) {
return -1;
}
} else {
log(LOG_WARN, "Unable to open configuration file '%s'.",fname);
tor_free(fname);
return -1;
}
} else { /* it opened successfully. use it. */
tor_free(fname);
cl = config_get_lines(cf);
if(!cl) return -1;
if(config_assign(options,cl) < 0)
return -1;
config_free_lines(cl);
config_close(cf);
}
/* go through command-line variables too */
cl = config_get_commandlines(argc,argv);
if(config_assign(options,cl) < 0)
return -1;
config_free_lines(cl);
/* Validate options */
/* first check if any of the previous options have changed but aren't allowed to */
if(previous_pidfile && strcmp(previous_pidfile,options->PidFile)) {
log_fn(LOG_WARN,"During reload, PidFile changed from %s to %s. Failing.",
previous_pidfile, options->PidFile);
return -1;
}
tor_free(previous_pidfile);
if(previous_runasdaemon && !options->RunAsDaemon) {
log_fn(LOG_WARN,"During reload, change from RunAsDaemon=1 to =0 not allowed. Failing.");
return -1;
}
if(previous_orport == 0 && options->ORPort > 0) {
log_fn(LOG_WARN,"During reload, change from ORPort=0 to >0 not allowed. Failing.");
return -1;
}
if(options->ORPort < 0) {
log(LOG_WARN,"ORPort option can't be negative.");
result = -1;
}
if (options->Nickname == NULL) {
if(server_mode()) {
if (!(options->Nickname = get_default_nickname()))
return -1;
log_fn(LOG_NOTICE, "Choosing default nickname %s", options->Nickname);
}
} else {
if (strspn(options->Nickname, LEGAL_NICKNAME_CHARACTERS) !=
strlen(options->Nickname)) {
log_fn(LOG_WARN, "Nickname '%s' contains illegal characters.", options->Nickname);
result = -1;
}
if (strlen(options->Nickname) > MAX_NICKNAME_LEN) {
log_fn(LOG_WARN, "Nickname '%s' has more than %d characters.",
options->Nickname, MAX_NICKNAME_LEN);
result = -1;
}
}
if(server_mode()) {
/* confirm that our address isn't broken, so we can complain now */
uint32_t tmp;
if(resolve_my_address(options->Address, &tmp) < 0)
result = -1;
}
if(options->SocksPort < 0) {
log(LOG_WARN,"SocksPort option can't be negative.");
result = -1;
}
if(options->SocksPort == 0 && options->ORPort == 0) {
log(LOG_WARN,"SocksPort and ORPort are both undefined? Quitting.");
result = -1;
}
if(options->DirPort < 0) {
log(LOG_WARN,"DirPort option can't be negative.");
result = -1;
}
if(options->StrictExitNodes && !strlen(options->ExitNodes)) {
log(LOG_WARN,"StrictExitNodes set, but no ExitNodes listed.");
}
if(options->StrictEntryNodes && !strlen(options->EntryNodes)) {
log(LOG_WARN,"StrictEntryNodes set, but no EntryNodes listed.");
}
if(options->AuthoritativeDir && options->RecommendedVersions == NULL) {
log(LOG_WARN,"Directory servers must configure RecommendedVersions.");
result = -1;
}
if(options->AuthoritativeDir && !options->DirPort) {
log(LOG_WARN,"Running as authoritative directory, but no DirPort set.");
result = -1;
}
if(options->AuthoritativeDir && !options->ORPort) {
log(LOG_WARN,"Running as authoritative directory, but no ORPort set.");
result = -1;
}
if(options->AuthoritativeDir && options->ClientOnly) {
log(LOG_WARN,"Running as authoritative directory, but ClientOnly also set.");
result = -1;
}
if(options->SocksPort >= 1 &&
(options->PathlenCoinWeight < 0.0 || options->PathlenCoinWeight >= 1.0)) {
log(LOG_WARN,"PathlenCoinWeight 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->DirFetchPostPeriod > MIN_ONION_KEY_LIFETIME/2) {
log(LOG_WARN,"DirFetchPostPeriod is too large; clipping.");
options->DirFetchPostPeriod = MIN_ONION_KEY_LIFETIME/2;
}
if(options->KeepalivePeriod < 1) {
log(LOG_WARN,"KeepalivePeriod option must be positive.");
result = -1;
}
/* XXX look at the various nicknamelists and make sure they're
* valid and don't have hostnames that are too long.
*/
if (rend_config_services(options) < 0) {
result = -1;
}
return result;
}
static int add_single_log(struct config_line_t *level_opt,
struct config_line_t *file_opt,
int isDaemon)
{
int levelMin=-1, levelMax=-1;
char *cp, *tmp_sev;
if (level_opt) {
cp = strchr(level_opt->value, '-');
if (cp) {
tmp_sev = tor_strndup(level_opt->value, cp - level_opt->value);
levelMin = parse_log_level(tmp_sev);
if (levelMin<0) {
log_fn(LOG_WARN, "Unrecognized log severity '%s': must be one of err|warn|notice|info|debug", tmp_sev);
return -1;
}
tor_free(tmp_sev);
levelMax = parse_log_level(cp+1);
if (levelMax<0) {
log_fn(LOG_WARN, "Unrecognized log severity '%s': must be one of err|warn|notice|info|debug", cp+1);
return -1;
}
} else {
levelMin = parse_log_level(level_opt->value);
if (levelMin<0) {
log_fn(LOG_WARN, "Unrecognized log severity '%s': must be one of err|warn|notice|info|debug", level_opt->value);
return -1;
}
}
}
if (levelMin < 0 && levelMax < 0) {
levelMin = LOG_NOTICE;
levelMax = LOG_ERR;
} else if (levelMin < 0) {
levelMin = levelMax;
} else {
levelMax = LOG_ERR;
}
if (file_opt) {
if (add_file_log(levelMin, levelMax, file_opt->value) < 0) {
log_fn(LOG_WARN, "Cannot write to LogFile '%s': %s.", file_opt->value,
strerror(errno));
return -1;
}
log_fn(LOG_NOTICE, "Successfully opened LogFile '%s', redirecting output.",
file_opt->value);
} else if (!isDaemon) {
add_stream_log(levelMin, levelMax, "<stdout>", stdout);
close_temp_logs();
}
return 0;
}
/**
* Initialize the logs based on the configuration file.
*/
int config_init_logs(or_options_t *options)
{
/* The order of options is: Level? (File Level?)+
*/
struct config_line_t *opt = options->LogOptions;
/* Special case if no options are given. */
if (!opt) {
add_stream_log(LOG_NOTICE, LOG_ERR, "<stdout>", stdout);
close_temp_logs();
/* don't return yet, in case we want to do a debuglogfile below */
}
/* Special case for if first option is LogLevel. */
if (opt && !strcasecmp(opt->key, "LogLevel")) {
if (opt->next && !strcasecmp(opt->next->key, "LogFile")) {
if (add_single_log(opt, opt->next, options->RunAsDaemon)<0)
return -1;
opt = opt->next->next;
} else if (!opt->next) {
if (add_single_log(opt, NULL, options->RunAsDaemon)<0)
return -1;
opt = opt->next;
} else {
; /* give warning below */
}
}
while (opt) {
if (!strcasecmp(opt->key, "LogLevel")) {
log_fn(LOG_WARN, "Two LogLevel options in a row without intervening LogFile");
opt = opt->next;
} else {
tor_assert(!strcasecmp(opt->key, "LogFile"));
if (opt->next && !strcasecmp(opt->next->key, "LogLevel")) {
/* LogFile followed by LogLevel */
if (add_single_log(opt->next, opt, options->RunAsDaemon)<0)
return -1;
opt = opt->next->next;
} else {
/* LogFile followed by LogFile or end of list. */
if (add_single_log(NULL, opt, options->RunAsDaemon)<0)
return -1;
opt = opt->next;
}
}
}
if (options->DebugLogFile) {
log_fn(LOG_WARN, "DebugLogFile is deprecated; use LogFile and LogLevel instead");
if (add_file_log(LOG_DEBUG, LOG_ERR, options->DebugLogFile)<0)
return -1;
}
return 0;
}
/** XXX008 DOCDOC */
void
config_parse_exit_policy(struct config_line_t *cfg,
struct exit_policy_t **dest)
{
struct exit_policy_t **nextp;
char *e, *s;
int last=0;
char line[1024];
if (!cfg)
return;
nextp = dest;
while (*nextp)
nextp = &((*nextp)->next);
for (; cfg; cfg = cfg->next) {
s = cfg->value;
for (;;) {
e = strchr(s,',');
if(!e) {
last = 1;
strncpy(line,s,1023);
} else {
memcpy(line,s, ((e-s)<1023)?(e-s):1023);
line[e-s] = 0;
}
line[1023]=0;
log_fn(LOG_DEBUG,"Adding new entry '%s'",line);
*nextp = router_parse_exit_policy_from_string(line);
if(*nextp) {
nextp = &((*nextp)->next);
} else {
log_fn(LOG_WARN,"Malformed exit policy %s; skipping.", line);
}
if (last)
break;
s = e+1;
}
}
}
void exit_policy_free(struct exit_policy_t *p) {
struct exit_policy_t *e;
while (p) {
e = p;
p = p->next;
tor_free(e->string);
tor_free(e);
}
}
const char *get_data_directory(or_options_t *options) {
const char *d;
if (options->DataDirectory)
d = options->DataDirectory;
else if (server_mode())
d = "~/.tor";
else
d = NULL; /* XXX008 don't create datadir until we have something
we'll be putting in it */
if (d && strncmp(d,"~/",2)==0) {
char *fn = expand_filename(d);
tor_free(options->DataDirectory);
options->DataDirectory = fn;
}
return options->DataDirectory;
}
/*
Local Variables:
mode:c
indent-tabs-mode:nil
c-basic-offset:2
End:
*/
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