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allow conns to demand to be attached to a clean circuit

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(nobody uses this yet)


svn:r1417
This commit is contained in:
Roger Dingledine 2004-03-31 23:06:16 +00:00
parent 2894813141
commit ee45ae575d
4 changed files with 34 additions and 18 deletions
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12
src/or/circuit.c
View File

@ -249,18 +249,22 @@ circuit_t *circuit_get_by_conn(connection_t *conn) {
* If !conn, return newest.
*
* If must_be_open, ignore circs not in CIRCUIT_STATE_OPEN.
* If must_be_clean, ignore circs that have been used before.
*/
circuit_t *circuit_get_newest(connection_t *conn, int must_be_open) {
circuit_t *circuit_get_newest(connection_t *conn,
int must_be_open, int must_be_clean) {
circuit_t *circ, *newest=NULL, *leastdirty=NULL;
routerinfo_t *exitrouter;
for(circ=global_circuitlist;circ;circ = circ->next) {
if(!circ->cpath)
for (circ=global_circuitlist;circ;circ = circ->next) {
if (!circ->cpath)
continue; /* this circ doesn't start at us */
if(must_be_open && (circ->state != CIRCUIT_STATE_OPEN || !circ->n_conn))
if (must_be_open && (circ->state != CIRCUIT_STATE_OPEN || !circ->n_conn))
continue; /* ignore non-open circs */
if (circ->marked_for_close)
continue;
if (must_be_clean && circ->timestamp_dirty)
continue; /* ignore dirty circs */
if(conn) {
if(circ->state == CIRCUIT_STATE_OPEN && circ->n_conn) /* open */
exitrouter = router_get_by_addr_port(circ->cpath->prev->addr, circ->cpath->prev->port);

35
src/or/connection_edge.c
View File

@ -9,8 +9,10 @@ extern or_options_t options; /* command-line and config-file options */
extern char *conn_state_to_string[][_CONN_TYPE_MAX+1];
static int connection_ap_handshake_process_socks(connection_t *conn);
static int connection_ap_handshake_attach_circuit(connection_t *conn);
static int connection_ap_handshake_attach_circuit_helper(connection_t *conn);
static int connection_ap_handshake_attach_circuit(connection_t *conn,
int must_be_clean);
static int connection_ap_handshake_attach_circuit_helper(connection_t *conn,
int must_be_clean);
static void connection_ap_handshake_send_begin(connection_t *ap_conn, circuit_t *circ);
static int connection_exit_begin_conn(cell_t *cell, circuit_t *circ);
@ -367,7 +369,8 @@ int connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ,
addr = ntohl(addr);
client_dns_set_entry(conn->socks_request->address, addr);
conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
if(connection_ap_handshake_attach_circuit(conn) >= 0)
/* attaching to a dirty circuit is fine */
if(connection_ap_handshake_attach_circuit(conn, 0) >= 0)
return 0;
/* else, conn will get closed below */
}
@ -635,7 +638,8 @@ void connection_ap_expire_beginning(void) {
circ->timestamp_dirty -= options.NewCircuitPeriod;
/* give our stream another 15 seconds to try */
conn->timestamp_lastread += 15;
if(connection_ap_handshake_attach_circuit(conn)<0) {
/* attaching to a dirty circuit is fine */
if(connection_ap_handshake_attach_circuit(conn,0)<0) {
/* it will never work */
/* Don't need to send end -- we're not connected */
connection_mark_for_close(conn, 0);
@ -658,7 +662,8 @@ void connection_ap_attach_pending(void)
if (conn->type != CONN_TYPE_AP ||
conn->state != AP_CONN_STATE_CIRCUIT_WAIT)
continue;
if(connection_ap_handshake_attach_circuit(conn) < 0) {
/* attaching to a dirty circuit is fine */
if(connection_ap_handshake_attach_circuit(conn,0) < 0) {
/* -1 means it will never work */
/* Don't send end; there is no 'other side' yet */
connection_mark_for_close(conn,0);
@ -720,18 +725,22 @@ static int connection_ap_handshake_process_socks(connection_t *conn) {
} /* else socks handshake is done, continue processing */
conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
return connection_ap_handshake_attach_circuit(conn);
/* attaching to a dirty circuit is fine */
return connection_ap_handshake_attach_circuit(conn,0);
}
static int connection_ap_handshake_attach_circuit(connection_t *conn) {
static int connection_ap_handshake_attach_circuit(connection_t *conn,
int must_be_clean) {
/* try attaching. launch new circuit if needed.
* return -1 if conn needs to die, else 0. */
switch(connection_ap_handshake_attach_circuit_helper(conn)) {
switch(connection_ap_handshake_attach_circuit_helper(conn, must_be_clean)) {
case -1: /* it will never work */
return -1;
case 0: /* no useful circuits available */
if(!circuit_get_newest(conn, 0)) /* is one already on the way? */
if(!circuit_get_newest(conn, 0, must_be_clean)) {
/* is one already on the way? */
circuit_launch_new();
}
return 0;
default: /* case 1, it succeeded, great */
return 0;
@ -744,7 +753,8 @@ static int connection_ap_handshake_attach_circuit(connection_t *conn) {
* Otherwise, associate conn with a safe live circuit, start
* sending a BEGIN cell down the circuit, and return 1.
*/
static int connection_ap_handshake_attach_circuit_helper(connection_t *conn) {
static int connection_ap_handshake_attach_circuit_helper(connection_t *conn,
int must_be_clean) {
circuit_t *circ;
uint32_t addr;
@ -754,7 +764,7 @@ static int connection_ap_handshake_attach_circuit_helper(connection_t *conn) {
assert(conn->socks_request);
/* find the circuit that we should use, if there is one. */
circ = circuit_get_newest(conn, 1);
circ = circuit_get_newest(conn, 1, must_be_clean);
if(!circ) {
log_fn(LOG_INFO,"No safe circuit ready for edge connection; delaying.");
@ -903,7 +913,8 @@ int connection_ap_make_bridge(char *address, uint16_t port) {
conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
connection_start_reading(conn);
if (connection_ap_handshake_attach_circuit(conn) < 0) {
/* attaching to a dirty circuit is fine */
if (connection_ap_handshake_attach_circuit(conn, 0) < 0) {
connection_mark_for_close(conn, 0);
close(fd[1]);
return -1;

2
src/or/main.c
View File

@ -381,7 +381,7 @@ static void run_scheduled_events(time_t now) {
/* Build a new test circuit every 5 minutes */
#define TESTING_CIRCUIT_INTERVAL 300
circ = circuit_get_newest(NULL, 1);
circ = circuit_get_newest(NULL, 1, 0);
if(time_to_new_circuit < now) {
client_dns_clean();
circuit_expire_unused_circuits();

3
src/or/or.h
View File

@ -658,7 +658,8 @@ int _circuit_mark_for_close(circuit_t *circ);
circuit_t *circuit_get_by_circ_id_conn(uint16_t circ_id, connection_t *conn);
circuit_t *circuit_get_by_conn(connection_t *conn);
circuit_t *circuit_get_newest(connection_t *conn, int must_be_open);
circuit_t *circuit_get_newest(connection_t *conn,
int must_be_open, int must_be_clean);
circuit_t *circuit_get_by_service_and_purpose(const char *servid, int purpose);
void circuit_expire_building(void);