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/* Copyright 2001,2002 Roger Dingledine, Matej Pfajfar. */
/* See LICENSE for licensing information */
/* $Id$ */
#include "or.h"
extern or_options_t options; /* command-line and config-file options */
void command_time_process_cell(cell_t *cell, connection_t *conn,
int *num, int *time,
void (*func)(cell_t *, connection_t *)) {
struct timeval start, end;
long time_passed;
*num += 1;
my_gettimeofday(&start);
(*func)(cell, conn);
my_gettimeofday(&end);
time_passed = tv_udiff(&start, &end) ;
if (time_passed > 5000) { /* more than 5ms */
log_fn(LOG_INFO,"That call just took %ld ms.",time_passed/1000);
}
*time += time_passed;
}
void command_process_cell(cell_t *cell, connection_t *conn) {
static int num_create=0, num_created=0, num_relay=0, num_destroy=0;
static int create_time=0, created_time=0, relay_time=0, destroy_time=0;
static long current_second = 0; /* from previous calls to gettimeofday */
struct timeval now;
my_gettimeofday(&now);
if(now.tv_sec > current_second) { /* the second has rolled over */
/* print stats */
log(LOG_INFO,"At end of second:");
log(LOG_INFO,"Create: %d (%d ms)", num_create, create_time/1000);
log(LOG_INFO,"Created: %d (%d ms)", num_created, created_time/1000);
log(LOG_INFO,"Relay: %d (%d ms)", num_relay, relay_time/1000);
log(LOG_INFO,"Destroy: %d (%d ms)", num_destroy, destroy_time/1000);
/* zero out stats */
num_create = num_created = num_relay = num_destroy = 0;
create_time = created_time = relay_time = destroy_time = 0;
/* remember which second it is, for next time */
current_second = now.tv_sec;
}
switch(cell->command) {
case CELL_PADDING:
/* do nothing */
break;
case CELL_CREATE:
command_time_process_cell(cell, conn, &num_create, &create_time,
command_process_create_cell);
break;
case CELL_CREATED:
command_time_process_cell(cell, conn, &num_created, &created_time,
command_process_created_cell);
break;
case CELL_RELAY:
command_time_process_cell(cell, conn, &num_relay, &relay_time,
command_process_relay_cell);
break;
case CELL_DESTROY:
command_time_process_cell(cell, conn, &num_destroy, &destroy_time,
command_process_destroy_cell);
break;
default:
log(LOG_DEBUG,"Cell of unknown type (%d) received. Dropping.", cell->command);
break;
}
}
void command_process_create_cell(cell_t *cell, connection_t *conn) {
circuit_t *circ;
circ = circuit_get_by_aci_conn(cell->aci, conn);
if(circ) {
log_fn(LOG_DEBUG,"received CREATE cell for known circ. Dropping.");
return;
}
circ = circuit_new(cell->aci, conn);
circ->state = CIRCUIT_STATE_ONIONSKIN_PENDING;
if(cell->length != DH_ONIONSKIN_LEN) {
log_fn(LOG_DEBUG,"Bad cell length %d. Dropping.", cell->length);
circuit_close(circ);
return;
}
memcpy(circ->onionskin,cell->payload,cell->length);
/* hand it off to the cpuworkers, and then return */
if(assign_to_cpuworker(NULL, CPUWORKER_TASK_ONION, circ) < 0) {
log_fn(LOG_DEBUG,"Failed to hand off onionskin. Closing.");
circuit_close(circ);
return;
}
log_fn(LOG_DEBUG,"success: handed off onionskin.");
}
void command_process_created_cell(cell_t *cell, connection_t *conn) {
circuit_t *circ;
cell_t newcell;
circ = circuit_get_by_aci_conn(cell->aci, conn);
if(!circ) {
log_fn(LOG_DEBUG,"received CREATED cell for unknown circ. Dropping.");
return;
}
if(circ->n_aci != cell->aci) {
log_fn(LOG_DEBUG,"got created cell from OPward? Dropping.");
return;
}
assert(cell->length == DH_KEY_LEN);
if(circ->cpath) { /* we're the OP. Handshake this. */
log_fn(LOG_DEBUG,"at OP. Finishing handshake.");
if(circuit_finish_handshake(circ, cell->payload) < 0) {
log_fn(LOG_INFO,"circuit_finish_handshake failed.");
circuit_close(circ);
return;
}
log_fn(LOG_DEBUG,"Moving to next skin.");
if(circuit_send_next_onion_skin(circ) < 0) {
log_fn(LOG_INFO,"circuit_send_next_onion_skin failed.");
circuit_close(circ);
return;
}
} else { /* pack it into an extended relay cell, and send it. */
memset(&newcell, 0, sizeof(cell_t));
newcell.command = CELL_RELAY;
newcell.aci = circ->p_aci;
SET_CELL_RELAY_COMMAND(newcell, RELAY_COMMAND_EXTENDED);
SET_CELL_STREAM_ID(newcell, ZERO_STREAM);
newcell.length = RELAY_HEADER_SIZE + cell->length;
memcpy(newcell.payload+RELAY_HEADER_SIZE, cell->payload, DH_KEY_LEN);
log_fn(LOG_DEBUG,"Sending extended relay cell.");
if(circuit_deliver_relay_cell(&newcell, circ, CELL_DIRECTION_IN, NULL) < 0) {
log_fn(LOG_DEBUG,"failed to deliver extended cell. Closing.");
circuit_close(circ);
return;
}
}
}
void command_process_relay_cell(cell_t *cell, connection_t *conn) {
circuit_t *circ;
circ = circuit_get_by_aci_conn(cell->aci, conn);
if(!circ) {
log_fn(LOG_DEBUG,"unknown circuit %d. Dropping.", cell->aci);
return;
}
if(circ->state == CIRCUIT_STATE_ONIONSKIN_PENDING) {
log_fn(LOG_DEBUG,"circuit in create_wait. Dropping.");
return;
}
if(cell->aci == circ->p_aci) { /* it's an outgoing cell */
cell->aci = circ->n_aci; /* switch it */
if(circuit_deliver_relay_cell(cell, circ, CELL_DIRECTION_OUT, conn->cpath_layer) < 0) {
log_fn(LOG_INFO,"circuit_deliver_relay_cell (forward) failed. Closing.");
circuit_close(circ);
return;
}
} else { /* it's an ingoing cell */
cell->aci = circ->p_aci; /* switch it */
if(circuit_deliver_relay_cell(cell, circ, CELL_DIRECTION_IN, NULL) < 0) {
log_fn(LOG_DEBUG,"circuit_deliver_relay_cell (backward) failed. Closing.");
circuit_close(circ);
return;
}
}
}
void command_process_destroy_cell(cell_t *cell, connection_t *conn) {
circuit_t *circ;
circ = circuit_get_by_aci_conn(cell->aci, conn);
if(!circ) {
log_fn(LOG_DEBUG,"unknown circuit %d. Dropping.", cell->aci);
return;
}
log_fn(LOG_DEBUG,"Received for aci %d.",cell->aci);
if(circ->state == CIRCUIT_STATE_ONIONSKIN_PENDING) {
onion_pending_remove(circ);
}
if(cell->aci == circ->p_aci || circ->cpath) {
/* either the destroy came from behind, or we're the AP */
circ->p_conn = NULL;
circuit_close(circ);
} else { /* the destroy came from ahead */
circ->n_conn = NULL;
log_fn(LOG_DEBUG, "Delivering 'truncated' back.");
connection_edge_send_command(NULL, circ, RELAY_COMMAND_TRUNCATED);
}
}
/*
Local Variables:
mode:c
indent-tabs-mode:nil
c-basic-offset:2
End:
*/
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