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288 lines
10 KiB
C
288 lines
10 KiB
C
/* Copyright 2001,2002 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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extern or_options_t options; /* command-line and config-file options */
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void command_time_process_cell(cell_t *cell, connection_t *conn,
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int *num, int *time,
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void (*func)(cell_t *, connection_t *)) {
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struct timeval start, end;
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long time_passed;
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*num += 1;
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my_gettimeofday(&start);
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(*func)(cell, conn);
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my_gettimeofday(&end);
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time_passed = tv_udiff(&start, &end) ;
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if (time_passed > 5000) { /* more than 5ms */
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log(LOG_INFO,"command_time_process_cell(): That call just took %d ms.",time_passed/1000);
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}
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*time += time_passed;
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}
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void command_process_cell(cell_t *cell, connection_t *conn) {
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static int num_create=0, num_relay=0, num_destroy=0, num_sendme=0;
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static int create_time=0, relay_time=0, destroy_time=0, sendme_time=0;
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static long current_second = 0; /* from previous calls to gettimeofday */
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struct timeval now;
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my_gettimeofday(&now);
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if(now.tv_sec > current_second) { /* the second has rolled over */
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/* print stats */
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log(LOG_INFO,"At end of second:");
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log(LOG_INFO,"Create: %d (%d ms)", num_create, create_time/1000);
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log(LOG_INFO,"Relay: %d (%d ms)", num_relay, relay_time/1000);
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log(LOG_INFO,"Destroy: %d (%d ms)", num_destroy, destroy_time/1000);
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log(LOG_INFO,"Sendme: %d (%d ms)", num_sendme, sendme_time/1000);
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/* zero out stats */
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num_create = num_relay = num_destroy = num_sendme = 0;
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create_time = relay_time = destroy_time = sendme_time = 0;
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/* remember which second it is, for next time */
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current_second = now.tv_sec;
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}
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switch(cell->command) {
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case CELL_PADDING:
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/* do nothing */
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break;
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case CELL_CREATE:
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command_time_process_cell(cell, conn, &num_create, &create_time,
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command_process_create_cell);
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break;
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case CELL_RELAY:
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command_time_process_cell(cell, conn, &num_relay, &relay_time,
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command_process_relay_cell);
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break;
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case CELL_DESTROY:
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command_time_process_cell(cell, conn, &num_destroy, &destroy_time,
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command_process_destroy_cell);
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break;
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case CELL_SENDME:
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command_time_process_cell(cell, conn, &num_sendme, &sendme_time,
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command_process_sendme_cell);
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break;
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default:
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log(LOG_DEBUG,"Cell of unknown type (%d) received. Dropping.", cell->command);
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break;
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}
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}
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void command_process_create_cell(cell_t *cell, connection_t *conn) {
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circuit_t *circ;
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circ = circuit_get_by_aci_conn(cell->aci, conn);
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if(circ && circ->state != CIRCUIT_STATE_ONION_WAIT) {
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log(LOG_DEBUG,"command_process_create_cell(): received CREATE cell, not in onion_wait. Dropping.");
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return;
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}
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if(!circ) { /* if it's not there, create it */
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circ = circuit_new(cell->aci, conn);
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circ->state = CIRCUIT_STATE_ONION_WAIT;
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circ->onionlen = ntohl(*(int*)cell->payload);
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log(LOG_DEBUG,"command_process_create_cell(): Onion length is %u.",circ->onionlen);
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if(circ->onionlen > 50000 || circ->onionlen < 1) { /* too big or too small */
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log(LOG_DEBUG,"That's ludicrous. Closing.");
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circuit_close(circ);
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return;
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}
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circ->onion = malloc(circ->onionlen);
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if(!circ->onion) {
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log(LOG_DEBUG,"command_process_create_cell(): Out of memory. Closing.");
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circuit_close(circ);
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return;
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}
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if(circ->onionlen < cell->length-4) { /* protect from buffer overflow */
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log(LOG_DEBUG,"command_process_create_cell(): Onion too small. Closing.");
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circuit_close(circ);
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return;
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}
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memcpy((void *)circ->onion,(void *)(cell->payload+4),cell->length-4);
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circ->recvlen = cell->length-4;
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log(LOG_DEBUG,"command_process_create_cell(): Primary create cell handled, have received %d of %d onion bytes.",
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circ->recvlen,circ->onionlen);
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} else { /* pull over as much of the onion as we can */
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if(cell->length + circ->recvlen > circ->onionlen) { /* protect from buffer overflow */
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log(LOG_DEBUG,"command_process_create_cell(): payload too big for onion. Closing.");
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circuit_close(circ);
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return;
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}
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memcpy((void *)(circ->onion+circ->recvlen),(void *)cell->payload,cell->length);
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circ->recvlen += cell->length;
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log(LOG_DEBUG,"command_process_create_cell(): Secondary create cell handled, have received %d of %d onion bytes (aci %d)",
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circ->recvlen,circ->onionlen,circ->p_aci);
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}
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if(circ->recvlen != circ->onionlen) {
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log(LOG_DEBUG,"command_process_create_cell(): Onion not all here yet. Ok.");
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return;
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}
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/* add it to the pending onions queue, and then return */
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circ->state = CIRCUIT_STATE_ONION_PENDING;
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if(onion_pending_add(circ) < 0) {
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log(LOG_DEBUG,"command_process_create_cell(): Failed to queue onion. Closing.");
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circuit_close(circ);
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}
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return;
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}
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void command_process_sendme_cell(cell_t *cell, connection_t *conn) {
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circuit_t *circ;
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circ = circuit_get_by_aci_conn(cell->aci, conn);
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if(!circ) {
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log(LOG_DEBUG,"command_process_sendme_cell(): unknown circuit %d. Dropping.", cell->aci);
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return;
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}
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if(circ->state == CIRCUIT_STATE_ONION_WAIT) {
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log(LOG_DEBUG,"command_process_sendme_cell(): circuit in onion_wait. Dropping.");
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return;
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}
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if(circ->state == CIRCUIT_STATE_OR_WAIT) {
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log(LOG_DEBUG,"command_process_sendme_cell(): circuit in or_wait. Dropping.");
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return;
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}
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/* at this point both circ->n_conn and circ->p_conn are guaranteed to be set */
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if(cell->length != CIRCWINDOW_INCREMENT) {
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log(LOG_WARNING,"command_process_sendme_cell(): non-standard sendme value %d.",cell->length);
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}
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if(cell->aci == circ->p_aci) { /* it's an outgoing cell */
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circ->n_receive_circwindow += cell->length;
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assert(circ->n_receive_circwindow <= CIRCWINDOW_START);
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log(LOG_DEBUG,"command_process_sendme_cell(): n_receive_circwindow for aci %d is %d.",circ->n_aci,circ->n_receive_circwindow);
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if(!circ->n_conn || circ->n_conn->type == CONN_TYPE_EXIT) {
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circuit_resume_edge_reading(circ, EDGE_EXIT);
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} else {
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cell->aci = circ->n_aci; /* switch it */
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if(connection_write_cell_to_buf(cell, circ->n_conn) < 0) {
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circuit_close(circ);
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return;
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}
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}
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} else { /* it's an ingoing cell */
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assert(cell->aci == circ->n_aci);
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circ->p_receive_circwindow += cell->length;
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log(LOG_DEBUG,"command_process_sendme_cell(): p_receive_circwindow for aci %d is %d.",circ->p_aci,circ->p_receive_circwindow);
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assert(circ->p_receive_circwindow <= CIRCWINDOW_START);
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if(!circ->p_conn || circ->p_conn->type == CONN_TYPE_AP) {
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circuit_resume_edge_reading(circ, EDGE_AP);
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} else {
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cell->aci = circ->p_aci; /* switch it */
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if(connection_write_cell_to_buf(cell, circ->p_conn) < 0) {
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circuit_close(circ);
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return;
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}
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}
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}
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}
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void command_process_relay_cell(cell_t *cell, connection_t *conn) {
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circuit_t *circ;
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circ = circuit_get_by_aci_conn(cell->aci, conn);
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if(!circ) {
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log(LOG_DEBUG,"command_process_relay_cell(): unknown circuit %d. Dropping.", cell->aci);
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return;
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}
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if(circ->state == CIRCUIT_STATE_ONION_PENDING) {
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log(LOG_DEBUG,"command_process_relay_cell(): circuit in create_wait. Queueing relay cell.");
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onion_pending_relay_add(circ, cell);
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return;
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}
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if(cell->aci == circ->p_aci) { /* it's an outgoing cell */
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if(--circ->p_receive_circwindow < 0) { /* is it less than 0 after decrement? */
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log(LOG_INFO,"connection_process_relay_cell(): Too many relay cells for out circuit (aci %d). Closing.", circ->p_aci);
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circuit_close(circ);
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return;
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}
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log(LOG_DEBUG,"connection_process_relay_cell(): p_receive_circwindow for aci %d is %d.",circ->p_aci,circ->p_receive_circwindow);
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}
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if(cell->aci == circ->n_aci) { /* it's an ingoing cell */
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if(--circ->n_receive_circwindow < 0) { /* is it less than 0 after decrement? */
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log(LOG_INFO,"connection_process_relay_cell(): Too many relay cells for in circuit (aci %d). Closing.", circ->n_aci);
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circuit_close(circ);
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return;
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}
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log(LOG_DEBUG,"connection_process_relay_cell(): n_receive_circwindow for aci %d is %d.",circ->n_aci,circ->n_receive_circwindow);
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}
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if(circ->state == CIRCUIT_STATE_ONION_WAIT) {
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log(LOG_WARNING,"command_process_relay_cell(): circuit in onion_wait. Dropping relay cell.");
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return;
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}
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if(circ->state == CIRCUIT_STATE_OR_WAIT) {
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log(LOG_WARNING,"command_process_relay_cell(): circuit in or_wait. Dropping relay cell.");
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return;
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}
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/* circ->p_conn and n_conn are only null if we're at an edge point with no connections yet */
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if(cell->aci == circ->p_aci) { /* it's an outgoing cell */
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cell->aci = circ->n_aci; /* switch it */
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if(circuit_deliver_relay_cell(cell, circ, CELL_DIRECTION_OUT) < 0) {
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log(LOG_INFO,"command_process_relay_cell(): circuit_deliver_relay_cell (forward) failed. Closing.");
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circuit_close(circ);
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return;
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}
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} else { /* it's an ingoing cell */
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cell->aci = circ->p_aci; /* switch it */
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if(circuit_deliver_relay_cell(cell, circ, CELL_DIRECTION_IN) < 0) {
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log(LOG_DEBUG,"command_process_relay_cell(): circuit_deliver_relay_cell (backward) failed. Closing.");
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circuit_close(circ);
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return;
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}
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}
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}
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void command_process_destroy_cell(cell_t *cell, connection_t *conn) {
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circuit_t *circ;
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circ = circuit_get_by_aci_conn(cell->aci, conn);
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if(!circ) {
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log(LOG_DEBUG,"command_process_destroy_cell(): unknown circuit %d. Dropping.", cell->aci);
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return;
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}
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log(LOG_DEBUG,"command_process_destroy_cell(): Received for aci %d.",cell->aci);
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if(circ->state == CIRCUIT_STATE_ONION_PENDING) {
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onion_pending_remove(circ);
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}
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if(cell->aci == circ->p_aci) /* the destroy came from behind */
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circ->p_conn = NULL;
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if(cell->aci == circ->n_aci) /* the destroy came from ahead */
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circ->n_conn = NULL;
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circuit_close(circ);
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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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