Commit 88edae94 authored by Roger Dingledine's avatar Roger Dingledine
Browse files

start refactoring dnsworker so testing won't be so darn hard

add NumCpus config variable in preparation for cpuworkers
hardcode /etc/torrc path for config (simplifies win32 port)
improve exit policy debugging during router entry parsing


svn:r397
parent e1f2693d
......@@ -4,16 +4,6 @@
#include "or.h"
const char *basename(const char *filename) {
char *result;
/* XXX This won't work on windows. */
result = strrchr(filename, '/');
if (result)
return result;
else
return filename;
}
/* open configuration file for reading */
FILE *config_open(const unsigned char *filename) {
assert(filename);
......@@ -189,6 +179,7 @@ void config_assign(or_options_t *options, struct config_line *list) {
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) ||
......@@ -214,7 +205,6 @@ int getconfig(int argc, char **argv, or_options_t *options) {
FILE *cf;
char fname[256];
int i;
const char *cmd;
int result = 0;
/* give reasonable values for each option. Defaults to zero. */
......@@ -228,11 +218,12 @@ int getconfig(int argc, char **argv, or_options_t *options) {
options->MaxOnionsPending = 10;
options->NewCircuitPeriod = 60; /* once a minute */
options->TotalBandwidth = 800000; /* at most 800kB/s total sustained incoming */
options->NumCpus = 1;
// options->ReconnectPeriod = 6001;
/* get config lines from /etc/torrc and assign them */
cmd = basename(argv[0]);
snprintf(fname,256,"/etc/%src",cmd);
#define rcfile "torrc"
snprintf(fname,256,"/etc/%s",rcfile);
cf = config_open(fname);
if(cf) {
......
......@@ -51,13 +51,17 @@ int connection_exit_begin_conn(cell_t *cell, circuit_t *circ) {
circ->n_streams = n_stream;
/* send it off to the gethostbyname farm */
if(dns_resolve(n_stream) < 0) {
log_fn(LOG_DEBUG,"Couldn't queue resolve request.");
connection_remove(n_stream);
connection_free(n_stream);
return 0;
switch(dns_resolve(n_stream)) {
case 1: /* resolve worked */
if(connection_exit_connect(n_stream) >= 0)
return 0;
/* else fall through */
case -1: /* resolve failed */
log_fn(LOG_DEBUG,"Couldn't queue resolve request.");
connection_remove(n_stream);
connection_free(n_stream);
case 0: /* resolve added to pending list */
}
return 0;
}
......
......@@ -19,6 +19,7 @@
int num_workers=0;
int num_workers_busy=0;
static void purge_expired_resolves(uint32_t now);
static int dns_assign_to_worker(connection_t *exitconn);
static void dns_found_answer(char *question, uint32_t answer);
int dnsworker_main(void *data);
......@@ -65,9 +66,26 @@ void dns_init(void) {
static struct cached_resolve *oldest_cached_resolve = NULL; /* linked list, */
static struct cached_resolve *newest_cached_resolve = NULL; /* oldest to newest */
static void purge_expired_resolves(uint32_t now) {
struct cached_resolve *resolve;
/* this is fast because the linked list
* oldest_cached_resolve is ordered by when they came in.
*/
while(oldest_cached_resolve && (oldest_cached_resolve->expire < now)) {
resolve = oldest_cached_resolve;
log(LOG_DEBUG,"Forgetting old cached resolve (expires %d)", resolve->expire);
oldest_cached_resolve = resolve->next;
if(!oldest_cached_resolve) /* if there are no more, */
newest_cached_resolve = NULL; /* then make sure the list's tail knows that too */
SPLAY_REMOVE(cache_tree, &cache_root, resolve);
free(resolve);
}
}
/* See if the question 'exitconn->address' has been answered. if so,
* if resolve valid, put it into exitconn->addr and exec to
* connection_exit_connect. If resolve failed, return -1.
* if resolve valid, put it into exitconn->addr and return 1.
* If resolve failed, return -1.
*
* Else, if seen before and pending, add conn to the pending list,
* and return 0.
......@@ -82,18 +100,8 @@ int dns_resolve(connection_t *exitconn) {
uint32_t now = time(NULL);
/* first take this opportunity to see if there are any expired
* resolves in the tree. this is fast because the linked list
* oldest_cached_resolve is ordered by when they came in.
*/
while(oldest_cached_resolve && (oldest_cached_resolve->expire < now)) {
resolve = oldest_cached_resolve;
log(LOG_DEBUG,"Forgetting old cached resolve (expires %d)", resolve->expire);
oldest_cached_resolve = resolve->next;
if(!oldest_cached_resolve) /* if there are no more, */
newest_cached_resolve = NULL; /* then make sure the list's tail knows that too */
SPLAY_REMOVE(cache_tree, &cache_root, resolve);
free(resolve);
}
resolves in the tree.*/
purge_expired_resolves(now);
/* now check the tree to see if 'question' is already there. */
strncpy(search.question, exitconn->address, MAX_ADDRESSLEN);
......@@ -109,7 +117,7 @@ int dns_resolve(connection_t *exitconn) {
return 0;
case CACHE_STATE_VALID:
exitconn->addr = resolve->answer;
return connection_exit_connect(exitconn);
return 1;
case CACHE_STATE_FAILED:
return -1;
}
......
......@@ -226,7 +226,7 @@ unsigned int *new_route(double cw, routerinfo_t **rarray, int rarray_len, int *r
}
if(num_acceptable_routers < *routelen) {
log(LOG_DEBUG,"new_route(): Cutting routelen from %d to %d.",*routelen, num_acceptable_routers);
log(LOG_NOTICE,"new_route(): Cutting routelen from %d to %d.",*routelen, num_acceptable_routers);
*routelen = num_acceptable_routers;
}
......@@ -246,7 +246,7 @@ unsigned int *new_route(double cw, routerinfo_t **rarray, int rarray_len, int *r
return NULL;
}
choice = choice % (rarray_len);
choice = choice % rarray_len;
log(LOG_DEBUG,"new_route(): Contemplating router %u.",choice);
if(choice == oldchoice ||
(oldchoice < rarray_len && !crypto_pk_cmp_keys(rarray[choice]->pkey, rarray[oldchoice]->pkey)) ||
......
......@@ -456,6 +456,7 @@ typedef struct {
int MaxOnionsPending;
int NewCircuitPeriod;
int TotalBandwidth;
int NumCpus;
int Role;
int loglevel;
} or_options_t;
......@@ -558,8 +559,6 @@ void command_process_connected_cell(cell_t *cell, connection_t *conn);
/********************************* config.c ***************************/
const char *basename(const char *filename);
/* open configuration file for reading */
FILE *config_open(const unsigned char *filename);
......
......@@ -842,8 +842,9 @@ static int router_add_exit_policy(routerinfo_t *router,
newe->address = strdup(arg);
newe->port = strdup(colon+1);
log(LOG_DEBUG,"router_add_exit_policy(): type %d, address '%s', port '%s'.",
newe->policy_type, newe->address, newe->port);
log(LOG_DEBUG,"router_add_exit_policy(): %s %s:%s",
newe->policy_type == EXIT_POLICY_REJECT ? "reject" : "accept",
newe->address, newe->port);
/* now link newe onto the end of exit_policy */
......
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