From 3516ae1a26dd0cc94cb3bd5a977357ad065b483f Mon Sep 17 00:00:00 2001 From: Roger Dingledine Date: Tue, 20 Jan 2004 09:21:46 +0000 Subject: [PATCH] add an ap_conn connecting state; report connecting delay svn:r1011 --- src/or/circuit.c | 24 +++++++++++-- src/or/connection.c | 3 +- src/or/connection_edge.c | 74 +++++++++++++++++++++++++++------------- src/or/main.c | 7 ++++ src/or/or.h | 7 ++-- 5 files changed, 87 insertions(+), 28 deletions(-) diff --git a/src/or/circuit.c b/src/or/circuit.c index 071c947269..212d0560b7 100644 --- a/src/or/circuit.c +++ b/src/or/circuit.c @@ -736,8 +736,28 @@ void circuit_about_to_close_connection(connection_t *conn) { } /* end switch */ } -void circuit_dump_details(int severity, circuit_t *circ, int poll_index, - char *type, int this_circid, int other_circid) { +void circuit_log_path(int severity, circuit_t *circ) { + static char b[1024]; + struct crypt_path_t *hop; + routerinfo_t *router; + assert(circ->cpath); + strcpy(b,"Stream is on circ: "); + for(hop=circ->cpath;hop->next != circ->cpath; hop=hop->next) { + router = router_get_by_addr_port(hop->addr,hop->port); + if(router) { + /* XXX strcat causes buffer overflow */ + strcat(b,router->nickname); + strcat(b,","); + } else { + strcat(b,"UNKNOWN,"); + } + } + log_fn(severity,"%s",b); +} + +static void +circuit_dump_details(int severity, circuit_t *circ, int poll_index, + char *type, int this_circid, int other_circid) { struct crypt_path_t *hop; log(severity,"Conn %d has %s circuit: circID %d (other side %d), state %d (%s), born %d", poll_index, type, this_circid, other_circid, circ->state, diff --git a/src/or/connection.c b/src/or/connection.c index b700b784f6..e2993fab35 100644 --- a/src/or/connection.c +++ b/src/or/connection.c @@ -45,7 +45,8 @@ char *conn_state_to_string[][_CONN_TYPE_MAX+1] = { "", /* 3 */ "awaiting dest info", /* app, 4 */ "waiting for safe circuit", /* 5 */ - "open" }, /* 6 */ + "waiting for connected", /* 6 */ + "open" }, /* 7 */ { "ready" }, /* dir listener, 0 */ { "", /* dir, 0 */ "connecting (fetch)", /* 1 */ diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index 0f27365971..4755f6fd43 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -87,8 +87,8 @@ int connection_edge_process_inbuf(connection_t *conn) { log_fn(LOG_INFO,"text from server while in 'connecting' state at exit. Leaving it on buffer."); return 0; } - - return 0; + log_fn(LOG_WARN,"Got unexpected state %d. Closing.",conn->state); + return -1; } static char *connection_edge_end_reason(char *payload, uint16_t length) { @@ -213,6 +213,27 @@ int connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ, connection conn->marked_for_close = 1; conn->has_sent_end = 1; return 0; + } + if(conn->type == CONN_TYPE_AP && rh.command == RELAY_COMMAND_CONNECTED) { + if(conn->state != AP_CONN_STATE_CONNECTING) { + log_fn(LOG_WARN,"Got 'connected' while not in state connecting. Dropping."); + return 0; + } + log_fn(LOG_INFO,"Connected! Notifying application."); + conn->state = AP_CONN_STATE_OPEN; + if (rh.length >= 4) { + addr = ntohl(*(uint32_t*)(cell->payload + RELAY_HEADER_SIZE)); + client_dns_set_entry(conn->socks_request->address, addr); + } + log_fn(LOG_WARN,"'connected' received after %d seconds.", + (int)(time(NULL) - conn->timestamp_lastread)); + circuit_log_path(LOG_WARN,circ); + if(connection_ap_handshake_socks_reply(conn, NULL, 0, 1) < 0) { + log_fn(LOG_INFO,"Writing to socks-speaking application failed. Closing."); + if(connection_edge_end(conn, END_STREAM_REASON_MISC, conn->cpath_layer) < 0) + log_fn(LOG_WARN,"3: I called connection_edge_end redundantly."); + } + return 0; } else { log_fn(LOG_WARN,"Got an unexpected relay command %d, in state %d (%s). Closing.", rh.command, conn->state, conn_state_to_string[conn->type][conn->state]); @@ -351,25 +372,8 @@ int connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ, connection circuit_truncated(circ, layer_hint); return 0; case RELAY_COMMAND_CONNECTED: - if(edge_type == EDGE_EXIT) { - log_fn(LOG_WARN,"'connected' unsupported at exit. Dropping."); - return 0; - } - if(!conn) { - log_fn(LOG_INFO,"connected cell dropped, unknown stream."); - return 0; - } - log_fn(LOG_INFO,"Connected! Notifying application."); - if (rh.length >= 4) { - addr = ntohl(*(uint32_t*)(cell->payload + RELAY_HEADER_SIZE)); - client_dns_set_entry(conn->socks_request->address, addr); - } - if(connection_ap_handshake_socks_reply(conn, NULL, 0, 1) < 0) { - log_fn(LOG_INFO,"Writing to socks-speaking application failed. Closing."); - if(connection_edge_end(conn, END_STREAM_REASON_MISC, conn->cpath_layer) < 0) - log_fn(LOG_WARN,"3: I called connection_edge_end redundantly."); - } - return 0; + log_fn(LOG_WARN,"'connected' unsupported while open. Closing."); + return -1; case RELAY_COMMAND_SENDME: if(!conn) { if(edge_type == EDGE_AP) { @@ -521,6 +525,28 @@ repeat_connection_edge_package_raw_inbuf: goto repeat_connection_edge_package_raw_inbuf; } +void connection_ap_expire_beginning(void) { + connection_t **carray; + connection_t *conn; + int n, i; + time_t now = time(NULL); + + get_connection_array(&carray, &n); + + for (i = 0; i < n; ++i) { + conn = carray[i]; + if (conn->type != CONN_TYPE_AP || + conn->state != AP_CONN_STATE_CONNECTING) + continue; + if (now - conn->timestamp_lastread > 30) { + log_fn(LOG_WARN,"Stream is %d seconds late. Closing.", + (int)(now - conn->timestamp_lastread)); + /* XXX here is where it should move back into 'pending' state */ + conn->marked_for_close = 1; + } + } +} + /* Tell any APs that are waiting for a new circuit that one is available */ void connection_ap_attach_pending(void) { @@ -649,6 +675,9 @@ static int connection_ap_handshake_attach_circuit(connection_t *conn) { connection_start_reading(conn); + /* here, print the circ's path. so people can figure out which circs are sucking. */ + circuit_log_path(LOG_WARN,circ); + if(!circ->timestamp_dirty) circ->timestamp_dirty = time(NULL); @@ -725,12 +754,11 @@ static void connection_ap_handshake_send_begin(connection_t *ap_conn, circuit_t ap_conn->package_window = STREAMWINDOW_START; ap_conn->deliver_window = STREAMWINDOW_START; - ap_conn->state = AP_CONN_STATE_OPEN; + ap_conn->state = AP_CONN_STATE_CONNECTING; /* XXX Right now, we rely on the socks client not to send us any data * XXX until we've sent back a socks reply. (If it does, we could wind * XXX up packaging that data and sending it to the exit, then later having * XXX the exit refuse us.) - * XXX Perhaps we should grow an AP_CONN_STATE_CONNECTING state. */ log_fn(LOG_INFO,"Address/port sent, ap socket %d, n_circ_id %d",ap_conn->s,circ->n_circ_id); return; diff --git a/src/or/main.c b/src/or/main.c index a03d850817..e8e5e7bfee 100644 --- a/src/or/main.c +++ b/src/or/main.c @@ -313,6 +313,13 @@ static void run_scheduled_events(time_t now) { */ circuit_expire_building(); + /* 2b. Also look at pending streams and prune the ones that 'began' + * a long time ago but haven't gotten a 'connected' yet. + * Do this before step 3, so we can put them back into pending + * state to be picked up by the new circuit. + */ + connection_ap_expire_beginning(); + /* 3. Every second, we try a new circuit if there are no valid * circuits. Every NewCircuitPeriod seconds, we expire circuits * that became dirty more than NewCircuitPeriod seconds ago, diff --git a/src/or/or.h b/src/or/or.h index 53a938e0c7..1e127d517c 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -164,8 +164,9 @@ #define _AP_CONN_STATE_MIN 4 #define AP_CONN_STATE_SOCKS_WAIT 4 #define AP_CONN_STATE_CIRCUIT_WAIT 5 -#define AP_CONN_STATE_OPEN 6 -#define _AP_CONN_STATE_MAX 6 +#define AP_CONN_STATE_CONNECTING 6 +#define AP_CONN_STATE_OPEN 7 +#define _AP_CONN_STATE_MAX 7 #define _DIR_CONN_STATE_MIN 1 #define DIR_CONN_STATE_CONNECTING_FETCH 1 @@ -589,6 +590,7 @@ void circuit_consider_sending_sendme(circuit_t *circ, int edge_type, crypt_path_ void circuit_close(circuit_t *circ); void circuit_about_to_close_connection(connection_t *conn); +void circuit_log_path(int severity, circuit_t *circ); void circuit_dump_by_conn(connection_t *conn, int severity); void circuit_expire_unused_circuits(void); @@ -687,6 +689,7 @@ int connection_edge_package_raw_inbuf(connection_t *conn); void connection_exit_connect(connection_t *conn); int connection_ap_can_use_exit(connection_t *conn, routerinfo_t *exit); +void connection_ap_expire_beginning(void); void connection_ap_attach_pending(void); extern uint64_t stats_n_data_cells_packaged;