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continue beating at pieces of The Bug

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svn:r1588
This commit is contained in:
Roger Dingledine 2004-04-09 21:31:09 +00:00
parent 23c193c065
commit d8c954e156
2 changed files with 66 additions and 54 deletions
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99
src/or/connection_edge.c
View File

@ -216,6 +216,53 @@ int connection_edge_send_command(connection_t *fromconn, circuit_t *circ,
return 0;
}
int connection_edge_process_relay_cell_not_open(
relay_header_t *rh, cell_t *cell, circuit_t *circ,
connection_t *conn, crypt_path_t *layer_hint) {
uint32_t addr;
if(rh->command == RELAY_COMMAND_END) {
log_fn(LOG_INFO,"Edge got end (%s) before we're connected. Marking for close.",
connection_edge_end_reason(cell->payload+RELAY_HEADER_SIZE, rh->length));
if(CIRCUIT_IS_ORIGIN(circ))
circuit_log_path(LOG_INFO,circ);
conn->has_sent_end = 1; /* we just got an 'end', don't need to send one */
connection_mark_for_close(conn, 0);
/* XXX This is where we should check if reason is EXITPOLICY, and reattach */
/* XXX here we should send a socks reject back if necessary, and hold
* open til flushed */
return 0;
}
if(conn->type == CONN_TYPE_AP && rh->command == RELAY_COMMAND_CONNECTED) {
if(conn->state != AP_CONN_STATE_CONNECT_WAIT) {
log_fn(LOG_WARN,"Got 'connected' while not in state connect_wait. Dropping.");
return 0;
}
// log_fn(LOG_INFO,"Connected! Notifying application.");
conn->state = AP_CONN_STATE_OPEN;
if (rh->length >= 4) {
addr = ntohl(get_uint32(cell->payload+RELAY_HEADER_SIZE));
client_dns_set_entry(conn->socks_request->address, addr);
}
log_fn(LOG_INFO,"'connected' received after %d seconds.",
(int)(time(NULL) - conn->timestamp_lastread));
circuit_log_path(LOG_INFO,circ);
connection_ap_handshake_socks_reply(conn, NULL, 0, 1);
conn->socks_request->has_finished = 1;
/* handle anything that might have queued */
if (connection_edge_package_raw_inbuf(conn) < 0) {
connection_mark_for_close(conn, END_STREAM_REASON_MISC);
return 0;
}
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]);
connection_mark_for_close(conn, END_STREAM_REASON_MISC);
return -1;
}
}
/* an incoming relay cell has arrived. return -1 if you want to tear down the
* circuit, else 0. */
int connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ,
@ -235,47 +282,11 @@ int connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ,
/* either conn is NULL, in which case we've got a control cell, or else
* conn points to the recognized stream. */
if(conn && conn->state != AP_CONN_STATE_OPEN && conn->state != EXIT_CONN_STATE_OPEN) {
if(rh.command == RELAY_COMMAND_END) {
log_fn(LOG_INFO,"Edge got end (%s) before we're connected. Marking for close.",
connection_edge_end_reason(cell->payload+RELAY_HEADER_SIZE, rh.length));
if(CIRCUIT_IS_ORIGIN(circ))
circuit_log_path(LOG_INFO,circ);
conn->has_sent_end = 1; /* we just got an 'end', don't need to send one */
connection_mark_for_close(conn, 0);
/* XXX This is where we should check if reason is EXITPOLICY, and reattach */
/* XXX here we should send a socks reject back if necessary, and hold
* open til flushed */
return 0;
}
if(conn->type == CONN_TYPE_AP && rh.command == RELAY_COMMAND_CONNECTED) {
if(conn->state != AP_CONN_STATE_CONNECT_WAIT) {
log_fn(LOG_WARN,"Got 'connected' while not in state connect_wait. Dropping.");
return 0;
}
// log_fn(LOG_INFO,"Connected! Notifying application.");
conn->state = AP_CONN_STATE_OPEN;
if (rh.length >= 4) {
addr = ntohl(get_uint32(cell->payload+RELAY_HEADER_SIZE));
client_dns_set_entry(conn->socks_request->address, addr);
}
log_fn(LOG_INFO,"'connected' received after %d seconds.",
(int)(time(NULL) - conn->timestamp_lastread));
circuit_log_path(LOG_INFO,circ);
connection_ap_handshake_socks_reply(conn, NULL, 0, 1);
conn->socks_request->has_finished = 1;
/* handle anything that might have queued */
if (connection_edge_package_raw_inbuf(conn) < 0) {
connection_mark_for_close(conn, END_STREAM_REASON_MISC);
return 0;
}
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]);
connection_mark_for_close(conn, END_STREAM_REASON_MISC);
return -1;
}
if(conn &&
conn->state != AP_CONN_STATE_OPEN &&
conn->state != EXIT_CONN_STATE_OPEN) {
return connection_edge_process_relay_cell_not_open(
&rh, cell, circ, conn, layer_hint);
}
switch(rh.command) {
@ -1146,7 +1157,8 @@ static int connection_exit_begin_conn(cell_t *cell, circuit_t *circ) {
return 0;
}
n_stream->address = tor_strdup(cell->payload + RELAY_HEADER_SIZE);
n_stream->state = EXIT_CONN_STATE_RESOLVING;
n_stream->state = EXIT_CONN_STATE_RESOLVEFAILED;
/* default to failed, change in dns_resolve if it turns out not to fail */
/* send it off to the gethostbyname farm */
switch(dns_resolve(n_stream)) {
@ -1155,9 +1167,6 @@ static int connection_exit_begin_conn(cell_t *cell, circuit_t *circ) {
return 0;
case -1: /* resolve failed */
log_fn(LOG_INFO,"Resolve failed (%s).", n_stream->address);
/* Set the state so that we don't try to remove n_stream from a DNS
* pending list. */
n_stream->state = EXIT_CONN_STATE_RESOLVEFAILED;
connection_mark_for_close(n_stream, END_STREAM_REASON_RESOLVEFAILED);
break;
case 0: /* resolve added to pending list */

11
src/or/dns.c
View File

@ -115,15 +115,12 @@ int dns_resolve(connection_t *exitconn) {
uint32_t now = time(NULL);
assert_connection_ok(exitconn, 0);
/* XXX leave disabled for dirservers so we can find the conn-munging bug */
if(!options.DirPort) {
/* first check if exitconn->address is an IP. If so, we already
* know the answer. */
if (tor_inet_aton(exitconn->address, &in) != 0) {
exitconn->addr = ntohl(in.s_addr);
return 1;
}
}
/* then take this opportunity to see if there are any expired
* resolves in the tree. */
@ -143,6 +140,7 @@ int dns_resolve(connection_t *exitconn) {
resolve->pending_connections = pending_connection;
log_fn(LOG_DEBUG,"Connection (fd %d) waiting for pending DNS resolve of '%s'",
exitconn->s, exitconn->address);
exitconn->state = EXIT_CONN_STATE_RESOLVING;
return 0;
case CACHE_STATE_VALID:
exitconn->addr = resolve->addr;
@ -166,6 +164,7 @@ int dns_resolve(connection_t *exitconn) {
pending_connection->conn = exitconn;
pending_connection->next = NULL;
resolve->pending_connections = pending_connection;
exitconn->state = EXIT_CONN_STATE_RESOLVING;
/* add us to the linked list of resolves */
if (!oldest_cached_resolve) {
@ -183,6 +182,8 @@ static int assign_to_dnsworker(connection_t *exitconn) {
connection_t *dnsconn;
unsigned char len;
assert(exitconn->state == EXIT_CONN_STATE_RESOLVING);
spawn_enough_dnsworkers(); /* respawn here, to be sure there are enough */
dnsconn = connection_get_by_type_state(CONN_TYPE_DNSWORKER, DNSWORKER_STATE_IDLE);
@ -376,8 +377,10 @@ static void dns_found_answer(char *address, uint32_t addr, char outcome) {
pend = resolve->pending_connections;
assert_connection_ok(pend->conn,time(NULL));
pend->conn->addr = resolve->addr;
/* prevent double-remove */
/* prevent double-remove. (this may get changed below.) */
pend->conn->state = EXIT_CONN_STATE_RESOLVEFAILED;
if(resolve->state == CACHE_STATE_FAILED) {
pendconn = pend->conn; /* don't pass complex things to the
connection_mark_for_close macro */