nihilist/tor
1
0
Fork 0
mirror of https://gitlab.torproject.org/tpo/core/tor.git synced 2024-09-21 13:34:59 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix one possible source of reuse-a-circuit-id bug; convert circuitbuild to new logging

Browse Source 
svn:r5301
This commit is contained in:
Nick Mathewson 2005-10-24 19:37:45 +00:00
parent beaf898fe5
commit fa338d85db
3 changed files with 131 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

170
src/or/circuitbuild.c
View File

@ -10,6 +10,7 @@ const char circuitbuild_c_id[] = "$Id$";
* \brief The actual details of building circuits. * \brief The actual details of building circuits.
**/ **/
#define NEW_LOG_INTERFACE
#include "or.h" #include "or.h"
/********* START VARIABLES **********/ /********* START VARIABLES **********/
@ -78,11 +79,11 @@ get_unique_circ_id_by_conn(connection_t *conn)
/* Make sure we don't loop forever if all circ_id's are used. This /* Make sure we don't loop forever if all circ_id's are used. This
* matters because it's an external DoS opportunity. * matters because it's an external DoS opportunity.
*/ */
log_fn(LOG_WARN,"No unused circ IDs. Failing."); warn(LD_CIRC,"No unused circ IDs. Failing.");
return 0; return 0;
} }
test_circ_id |= high_bit; test_circ_id |= high_bit;
} while (circuit_get_by_circid_orconn(test_circ_id, conn)); } while (circuit_id_used_on_conn(test_circ_id, conn));
return test_circ_id; return test_circ_id;
} }
@ -149,10 +150,10 @@ circuit_list_path(circuit_t *circ, int verbose)
* exit point. * exit point.
*/ */
void void
circuit_log_path(int severity, circuit_t *circ) circuit_log_path(int severity, int domain, circuit_t *circ)
{ {
char *s = circuit_list_path(circ,1); char *s = circuit_list_path(circ,1);
log_fn(severity,"%s",s); log(severity,domain,"%s",s);
tor_free(s); tor_free(s);
} }
@ -207,11 +208,11 @@ static void
circuit_dump_details(int severity, circuit_t *circ, int poll_index, circuit_dump_details(int severity, circuit_t *circ, int poll_index,
const char *type, int this_circid, int other_circid) const char *type, int this_circid, int other_circid)
{ {
log(severity,"Conn %d has %s circuit: circID %d (other side %d), state %d (%s), born %d:", log(severity, LD_CIRC, "Conn %d has %s circuit: circID %d (other side %d), state %d (%s), born %d:",
poll_index, type, this_circid, other_circid, circ->state, poll_index, type, this_circid, other_circid, circ->state,
circuit_state_to_string(circ->state), (int)circ->timestamp_created); circuit_state_to_string(circ->state), (int)circ->timestamp_created);
if (CIRCUIT_IS_ORIGIN(circ)) { /* circ starts at this node */ if (CIRCUIT_IS_ORIGIN(circ)) { /* circ starts at this node */
circuit_log_path(severity, circ); circuit_log_path(severity, LD_CIRC, circ);
} }
} }
@ -265,7 +266,7 @@ again:
r = onion_extend_cpath(circ->purpose, &circ->cpath, circ->build_state); r = onion_extend_cpath(circ->purpose, &circ->cpath, circ->build_state);
// || !CIRCUIT_IS_ORIGIN(circ)) { // wtf? -rd // || !CIRCUIT_IS_ORIGIN(circ)) { // wtf? -rd
if (r < 0) { if (r < 0) {
log_fn(LOG_INFO,"Generating cpath hop failed."); info(LD_CIRC,"Generating cpath hop failed.");
return -1; return -1;
} }
if (r == 0) if (r == 0)
@ -337,7 +338,7 @@ circuit_handle_first_hop(circuit_t *circ)
/* now see if we're already connected to the first OR in 'route' */ /* now see if we're already connected to the first OR in 'route' */
in.s_addr = htonl(firsthop->extend_info->addr); in.s_addr = htonl(firsthop->extend_info->addr);
tor_inet_ntoa(&in, tmpbuf, sizeof(tmpbuf)); tor_inet_ntoa(&in, tmpbuf, sizeof(tmpbuf));
log_fn(LOG_DEBUG,"Looking for firsthop '%s:%u'",tmpbuf, debug(LD_CIRC,"Looking for firsthop '%s:%u'",tmpbuf,
firsthop->extend_info->port); firsthop->extend_info->port);
/* imprint the circuit with its future n_conn->id */ /* imprint the circuit with its future n_conn->id */
memcpy(circ->n_conn_id_digest, firsthop->extend_info->identity_digest, memcpy(circ->n_conn_id_digest, firsthop->extend_info->identity_digest,
@ -353,12 +354,12 @@ circuit_handle_first_hop(circuit_t *circ)
firsthop->extend_info->port, firsthop->extend_info->port,
firsthop->extend_info->identity_digest); firsthop->extend_info->identity_digest);
if (!n_conn) { /* connect failed, forget the whole thing */ if (!n_conn) { /* connect failed, forget the whole thing */
log_fn(LOG_INFO,"connect to firsthop failed. Closing."); info(LD_CIRC,"connect to firsthop failed. Closing.");
return -1; return -1;
} }
} }
log_fn(LOG_DEBUG,"connecting in progress (or finished). Good."); debug(LD_CIRC,"connecting in progress (or finished). Good.");
/* return success. The onion/circuit/etc will be taken care of automatically /* return success. The onion/circuit/etc will be taken care of automatically
* (may already have been) whenever n_conn reaches OR_CONN_STATE_OPEN. * (may already have been) whenever n_conn reaches OR_CONN_STATE_OPEN.
*/ */
@ -367,9 +368,9 @@ circuit_handle_first_hop(circuit_t *circ)
circ->n_addr = n_conn->addr; circ->n_addr = n_conn->addr;
circ->n_port = n_conn->port; circ->n_port = n_conn->port;
circ->n_conn = n_conn; circ->n_conn = n_conn;
log_fn(LOG_DEBUG,"Conn open. Delivering first onion skin."); debug(LD_CIRC,"Conn open. Delivering first onion skin.");
if (circuit_send_next_onion_skin(circ) < 0) { if (circuit_send_next_onion_skin(circ) < 0) {
log_fn(LOG_INFO,"circuit_send_next_onion_skin failed."); info(LD_CIRC,"circuit_send_next_onion_skin failed.");
return -1; return -1;
} }
} }
@ -386,7 +387,7 @@ circuit_n_conn_done(connection_t *or_conn, int status)
{ {
circuit_t *circ; circuit_t *circ;
log_fn(LOG_DEBUG,"or_conn to %s, status=%d", debug(LD_CIRC,"or_conn to %s, status=%d",
or_conn->nickname ? or_conn->nickname : "NULL", status); or_conn->nickname ? or_conn->nickname : "NULL", status);
for (circ=global_circuitlist;circ;circ = circ->next) { for (circ=global_circuitlist;circ;circ = circ->next) {
@ -398,16 +399,16 @@ circuit_n_conn_done(connection_t *or_conn, int status)
circ->n_port == or_conn->port && circ->n_port == or_conn->port &&
!memcmp(or_conn->identity_digest, circ->n_conn_id_digest, DIGEST_LEN)) { !memcmp(or_conn->identity_digest, circ->n_conn_id_digest, DIGEST_LEN)) {
if (!status) { /* or_conn failed; close circ */ if (!status) { /* or_conn failed; close circ */
log_fn(LOG_INFO,"or_conn failed. Closing circ."); info(LD_CIRC,"or_conn failed. Closing circ.");
circuit_mark_for_close(circ); circuit_mark_for_close(circ);
continue; continue;
} }
log_fn(LOG_DEBUG,"Found circ %d, sending create cell.", circ->n_circ_id); debug(LD_CIRC,"Found circ %d, sending create cell.", circ->n_circ_id);
circ->n_conn = or_conn; circ->n_conn = or_conn;
memcpy(circ->n_conn_id_digest, or_conn->identity_digest, DIGEST_LEN); memcpy(circ->n_conn_id_digest, or_conn->identity_digest, DIGEST_LEN);
if (CIRCUIT_IS_ORIGIN(circ)) { if (CIRCUIT_IS_ORIGIN(circ)) {
if (circuit_send_next_onion_skin(circ) < 0) { if (circuit_send_next_onion_skin(circ) < 0) {
log_fn(LOG_INFO,"send_next_onion_skin failed; circuit marked for closing."); info(LD_CIRC,"send_next_onion_skin failed; circuit marked for closing.");
circuit_mark_for_close(circ); circuit_mark_for_close(circ);
continue; continue;
/* XXX could this be bad, eg if next_onion_skin failed because conn died? */ /* XXX could this be bad, eg if next_onion_skin failed because conn died? */
@ -443,10 +444,10 @@ circuit_deliver_create_cell(circuit_t *circ, uint8_t cell_type, char *payload)
id = get_unique_circ_id_by_conn(circ->n_conn); id = get_unique_circ_id_by_conn(circ->n_conn);
if (!id) { if (!id) {
log_fn(LOG_WARN,"failed to get unique circID."); warn(LD_CIRC,"failed to get unique circID.");
return -1; return -1;
} }
log_fn(LOG_DEBUG,"Chosen circID %u.", id); debug(LD_CIRC,"Chosen circID %u.", id);
circuit_set_circid_orconn(circ, id, circ->n_conn, N_CONN_CHANGED); circuit_set_circid_orconn(circ, id, circ->n_conn, N_CONN_CHANGED);
memset(&cell, 0, sizeof(cell_t)); memset(&cell, 0, sizeof(cell_t));
@ -471,7 +472,7 @@ inform_testing_reachability(void)
if (me->dir_port) if (me->dir_port)
tor_snprintf(dirbuf, sizeof(dirbuf), " and DirPort %s:%d", tor_snprintf(dirbuf, sizeof(dirbuf), " and DirPort %s:%d",
me->address, me->dir_port); me->address, me->dir_port);
log(LOG_NOTICE,"Now checking whether ORPort %s:%d%s %s reachable... (this may take several minutes)", log(LOG_NOTICE, LD_OR, "Now checking whether ORPort %s:%d%s %s reachable... (this may take several minutes)",
me->address, me->or_port, me->address, me->or_port,
me->dir_port ? dirbuf : "", me->dir_port ? dirbuf : "",
me->dir_port ? "are" : "is"); me->dir_port ? "are" : "is");
@ -504,7 +505,7 @@ circuit_send_next_onion_skin(circuit_t *circ)
if (circ->cpath->state == CPATH_STATE_CLOSED) { if (circ->cpath->state == CPATH_STATE_CLOSED) {
uint8_t cell_type; uint8_t cell_type;
log_fn(LOG_DEBUG,"First skin; sending create cell."); debug(LD_CIRC,"First skin; sending create cell.");
router = router_get_by_digest(circ->n_conn->identity_digest); router = router_get_by_digest(circ->n_conn->identity_digest);
@ -518,7 +519,7 @@ circuit_send_next_onion_skin(circuit_t *circ)
if (onion_skin_create(circ->cpath->extend_info->onion_key, if (onion_skin_create(circ->cpath->extend_info->onion_key,
&(circ->cpath->dh_handshake_state), &(circ->cpath->dh_handshake_state),
payload) < 0) { payload) < 0) {
log_fn(LOG_WARN,"onion_skin_create (first hop) failed."); warn(LD_CIRC,"onion_skin_create (first hop) failed.");
return -1; return -1;
} }
} else { } else {
@ -537,22 +538,23 @@ circuit_send_next_onion_skin(circuit_t *circ)
circ->cpath->state = CPATH_STATE_AWAITING_KEYS; circ->cpath->state = CPATH_STATE_AWAITING_KEYS;
circ->state = CIRCUIT_STATE_BUILDING; circ->state = CIRCUIT_STATE_BUILDING;
log_fn(LOG_DEBUG,"first skin; finished sending create cell."); debug(LD_CIRC,"first skin; finished sending create cell.");
} else { } else {
tor_assert(circ->cpath->state == CPATH_STATE_OPEN); tor_assert(circ->cpath->state == CPATH_STATE_OPEN);
tor_assert(circ->state == CIRCUIT_STATE_BUILDING); tor_assert(circ->state == CIRCUIT_STATE_BUILDING);
log_fn(LOG_DEBUG,"starting to send subsequent skin."); debug(LD_CIRC,"starting to send subsequent skin.");
hop = onion_next_hop_in_cpath(circ->cpath); hop = onion_next_hop_in_cpath(circ->cpath);
if (!hop) { if (!hop) {
/* done building the circuit. whew. */ /* done building the circuit. whew. */
circ->state = CIRCUIT_STATE_OPEN; circ->state = CIRCUIT_STATE_OPEN;
log_fn(LOG_INFO,"circuit built!"); info(LD_CIRC,"circuit built!");
circuit_reset_failure_count(0); circuit_reset_failure_count(0);
if (!has_completed_circuit) { if (!has_completed_circuit) {
or_options_t *options = get_options(); or_options_t *options = get_options();
has_completed_circuit=1; has_completed_circuit=1;
/* FFFF Log a count of known routers here */ /* FFFF Log a count of known routers here */
log(LOG_NOTICE,"Tor has successfully opened a circuit. Looks like it's working."); log(LOG_NOTICE, LD_GENERAL,
"Tor has successfully opened a circuit. Looks like it's working.");
if (server_mode(options) && !check_whether_orport_reachable()) { if (server_mode(options) && !check_whether_orport_reachable()) {
inform_testing_reachability(); inform_testing_reachability();
} }
@ -571,11 +573,11 @@ circuit_send_next_onion_skin(circuit_t *circ)
if (onion_skin_create(hop->extend_info->onion_key, if (onion_skin_create(hop->extend_info->onion_key,
&(hop->dh_handshake_state), onionskin) < 0) { &(hop->dh_handshake_state), onionskin) < 0) {
log_fn(LOG_WARN,"onion_skin_create failed."); warn(LD_CIRC,"onion_skin_create failed.");
return -1; return -1;
} }
log_fn(LOG_DEBUG,"Sending extend relay cell."); debug(LD_CIRC,"Sending extend relay cell.");
/* send it to hop->prev, because it will transfer /* send it to hop->prev, because it will transfer
* it to a create cell and then send to hop */ * it to a create cell and then send to hop */
if (connection_edge_send_command(NULL, circ, RELAY_COMMAND_EXTEND, if (connection_edge_send_command(NULL, circ, RELAY_COMMAND_EXTEND,
@ -593,7 +595,7 @@ circuit_send_next_onion_skin(circuit_t *circ)
void void
circuit_note_clock_jumped(int seconds_elapsed) circuit_note_clock_jumped(int seconds_elapsed)
{ {
log(LOG_NOTICE,"Your clock just jumped %d seconds forward; assuming established circuits no longer work.", seconds_elapsed); log(LOG_NOTICE, LD_GENERAL,"Your clock just jumped %d seconds forward; assuming established circuits no longer work.", seconds_elapsed);
has_completed_circuit=0; /* so it'll log when it works again */ has_completed_circuit=0; /* so it'll log when it works again */
circuit_mark_all_unused_circs(); circuit_mark_all_unused_circs();
} }
@ -612,14 +614,15 @@ circuit_extend(cell_t *cell, circuit_t *circ)
char *id_digest=NULL; char *id_digest=NULL;
if (circ->n_conn) { if (circ->n_conn) {
log_fn(LOG_PROTOCOL_WARN,"n_conn already set. Bug/attack. Closing."); log_fn(LOG_PROTOCOL_WARN,LD_PROTOCOL,
"n_conn already set. Bug/attack. Closing.");
return -1; return -1;
} }
relay_header_unpack(&rh, cell->payload); relay_header_unpack(&rh, cell->payload);
if (rh.length < 4+2+ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN) { if (rh.length < 4+2+ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN) {
log_fn(LOG_PROTOCOL_WARN, "Wrong length %d on extend cell. Closing circuit.", rh.length); log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL,"Wrong length %d on extend cell. Closing circuit.", rh.length);
return -1; return -1;
} }
@ -638,7 +641,8 @@ circuit_extend(cell_t *cell, circuit_t *circ)
char tmpbuf[INET_NTOA_BUF_LEN]; char tmpbuf[INET_NTOA_BUF_LEN];
in.s_addr = htonl(circ->n_addr); in.s_addr = htonl(circ->n_addr);
tor_inet_ntoa(&in,tmpbuf,sizeof(tmpbuf)); tor_inet_ntoa(&in,tmpbuf,sizeof(tmpbuf));
log_fn(LOG_INFO,"Next router (%s:%d) not connected. Connecting.", /* XXXX LD_OR? NM */
info(LD_CIRC,"Next router (%s:%d) not connected. Connecting.",
tmpbuf, circ->n_port); tmpbuf, circ->n_port);
memcpy(circ->onionskin, onionskin, ONIONSKIN_CHALLENGE_LEN); memcpy(circ->onionskin, onionskin, ONIONSKIN_CHALLENGE_LEN);
@ -654,11 +658,11 @@ circuit_extend(cell_t *cell, circuit_t *circ)
/* we should try to open a connection */ /* we should try to open a connection */
n_conn = connection_or_connect(circ->n_addr, circ->n_port, id_digest); n_conn = connection_or_connect(circ->n_addr, circ->n_port, id_digest);
if (!n_conn) { if (!n_conn) {
log_fn(LOG_INFO,"Launching n_conn failed. Closing."); info(LD_CIRC,"Launching n_conn failed. Closing circuit.");
circuit_mark_for_close(circ); circuit_mark_for_close(circ);
return 0; return 0;
} }
log_fn(LOG_DEBUG,"connecting in progress (or finished). Good."); debug(LD_CIRC,"connecting in progress (or finished). Good.");
} }
/* return success. The onion/circuit/etc will be taken care of automatically /* return success. The onion/circuit/etc will be taken care of automatically
* (may already have been) whenever n_conn reaches OR_CONN_STATE_OPEN. * (may already have been) whenever n_conn reaches OR_CONN_STATE_OPEN.
@ -672,7 +676,7 @@ circuit_extend(cell_t *cell, circuit_t *circ)
circ->n_conn = n_conn; circ->n_conn = n_conn;
memcpy(circ->n_conn_id_digest, n_conn->identity_digest, DIGEST_LEN); memcpy(circ->n_conn_id_digest, n_conn->identity_digest, DIGEST_LEN);
log_fn(LOG_DEBUG,"n_conn is %s:%u",n_conn->address,n_conn->port); debug(LD_CIRC,"n_conn is %s:%u",n_conn->address,n_conn->port);
if (circuit_deliver_create_cell(circ, CELL_CREATE, onionskin) < 0) if (circuit_deliver_create_cell(circ, CELL_CREATE, onionskin) < 0)
return -1; return -1;
@ -711,12 +715,12 @@ circuit_init_cpath_crypto(crypt_path_t *cpath, char *key_data, int reverse)
// (unsigned int)*(uint32_t*)(key_data+40), (unsigned int)*(uint32_t*)(key_data+40+16)); // (unsigned int)*(uint32_t*)(key_data+40), (unsigned int)*(uint32_t*)(key_data+40+16));
if (!(cpath->f_crypto = if (!(cpath->f_crypto =
crypto_create_init_cipher(key_data+(2*DIGEST_LEN),1))) { crypto_create_init_cipher(key_data+(2*DIGEST_LEN),1))) {
log(LOG_WARN,"Bug: forward cipher initialization failed."); warn(LD_BUG,"Bug: forward cipher initialization failed.");
return -1; return -1;
} }
if (!(cpath->b_crypto = if (!(cpath->b_crypto =
crypto_create_init_cipher(key_data+(2*DIGEST_LEN)+CIPHER_KEY_LEN,0))) { crypto_create_init_cipher(key_data+(2*DIGEST_LEN)+CIPHER_KEY_LEN,0))) {
log(LOG_WARN,"Bug: backward cipher initialization failed."); warn(LD_BUG,"Bug: backward cipher initialization failed.");
return -1; return -1;
} }
@ -753,7 +757,7 @@ circuit_finish_handshake(circuit_t *circ, uint8_t reply_type, char *reply)
else { else {
hop = onion_next_hop_in_cpath(circ->cpath); hop = onion_next_hop_in_cpath(circ->cpath);
if (!hop) { /* got an extended when we're all done? */ if (!hop) { /* got an extended when we're all done? */
log_fn(LOG_WARN,"got extended when circ already built? Closing."); warn(LD_PROTOCOL,"got extended when circ already built? Closing.");
return -1; return -1;
} }
} }
@ -762,7 +766,7 @@ circuit_finish_handshake(circuit_t *circ, uint8_t reply_type, char *reply)
if (reply_type == CELL_CREATED && hop->dh_handshake_state) { if (reply_type == CELL_CREATED && hop->dh_handshake_state) {
if (onion_skin_client_handshake(hop->dh_handshake_state, reply, keys, if (onion_skin_client_handshake(hop->dh_handshake_state, reply, keys,
DIGEST_LEN*2+CIPHER_KEY_LEN*2) < 0) { DIGEST_LEN*2+CIPHER_KEY_LEN*2) < 0) {
log_fn(LOG_WARN,"onion_skin_client_handshake failed."); warn(LD_CIRC,"onion_skin_client_handshake failed.");
return -1; return -1;
} }
/* Remember hash of g^xy */ /* Remember hash of g^xy */
@ -770,12 +774,12 @@ circuit_finish_handshake(circuit_t *circ, uint8_t reply_type, char *reply)
} else if (reply_type == CELL_CREATED_FAST && !hop->dh_handshake_state) { } else if (reply_type == CELL_CREATED_FAST && !hop->dh_handshake_state) {
if (fast_client_handshake(hop->fast_handshake_state, reply, keys, if (fast_client_handshake(hop->fast_handshake_state, reply, keys,
DIGEST_LEN*2+CIPHER_KEY_LEN*2) < 0) { DIGEST_LEN*2+CIPHER_KEY_LEN*2) < 0) {
log_fn(LOG_WARN,"fast_client_handshake failed."); warn(LD_CIRC,"fast_client_handshake failed.");
return -1; return -1;
} }
memcpy(hop->handshake_digest, reply+DIGEST_LEN, DIGEST_LEN); memcpy(hop->handshake_digest, reply+DIGEST_LEN, DIGEST_LEN);
} else { } else {
log_fn(LOG_WARN,"CREATED cell type did not match CREATE cell type."); warn(LD_PROTOCOL,"CREATED cell type did not match CREATE cell type.");
return -1; return -1;
} }
@ -790,8 +794,8 @@ circuit_finish_handshake(circuit_t *circ, uint8_t reply_type, char *reply)
} }
hop->state = CPATH_STATE_OPEN; hop->state = CPATH_STATE_OPEN;
log_fn(LOG_INFO,"Finished building circuit hop:"); info(LD_CIRC,"Finished building circuit hop:");
circuit_log_path(LOG_INFO,circ); circuit_log_path(LOG_INFO,LD_CIRC,circ);
control_event_circuit_status(circ, CIRC_EVENT_EXTENDED); control_event_circuit_status(circ, CIRC_EVENT_EXTENDED);
return 0; return 0;
@ -824,11 +828,12 @@ circuit_truncated(circuit_t *circ, crypt_path_t *layer)
while (layer->next != circ->cpath) { while (layer->next != circ->cpath) {
/* we need to clear out layer->next */ /* we need to clear out layer->next */
victim = layer->next; victim = layer->next;
log_fn(LOG_DEBUG, "Killing a layer of the cpath."); debug(LD_CIRC, "Killing a layer of the cpath.");
for (stream = circ->p_streams; stream; stream=stream->next_stream) { for (stream = circ->p_streams; stream; stream=stream->next_stream) {
if (stream->cpath_layer == victim) { if (stream->cpath_layer == victim) {
log_fn(LOG_INFO, "Marking stream %d for close.", stream->stream_id); /* XXXX NM LD_CIRC? */
info(LD_APP, "Marking stream %d for close.", stream->stream_id);
/* no need to send 'end' relay cells, /* no need to send 'end' relay cells,
* because the other side's already dead * because the other side's already dead
*/ */
@ -840,7 +845,7 @@ circuit_truncated(circuit_t *circ, crypt_path_t *layer)
circuit_free_cpath_node(victim); circuit_free_cpath_node(victim);
} }
log_fn(LOG_INFO, "finished"); info(LD_CIRC, "finished");
return 0; return 0;
#endif #endif
} }
@ -866,10 +871,10 @@ onionskin_answer(circuit_t *circ, uint8_t cell_type, char *payload, char *keys)
memcpy(cell.payload, payload, memcpy(cell.payload, payload,
cell_type == CELL_CREATED ? ONIONSKIN_REPLY_LEN : DIGEST_LEN*2); cell_type == CELL_CREATED ? ONIONSKIN_REPLY_LEN : DIGEST_LEN*2);
log_fn(LOG_DEBUG,"init digest forward 0x%.8x, backward 0x%.8x.", debug(LD_CIRC,"init digest forward 0x%.8x, backward 0x%.8x.",
(unsigned int)*(uint32_t*)(keys), (unsigned int)*(uint32_t*)(keys+20)); (unsigned int)*(uint32_t*)(keys), (unsigned int)*(uint32_t*)(keys+20));
if (circuit_init_cpath_crypto(tmp_cpath, keys, 0)<0) { if (circuit_init_cpath_crypto(tmp_cpath, keys, 0)<0) {
log_fn(LOG_WARN,"Circuit initialization failed"); warn(LD_BUG,"Circuit initialization failed");
tor_free(tmp_cpath); tor_free(tmp_cpath);
return -1; return -1;
} }
@ -886,7 +891,7 @@ onionskin_answer(circuit_t *circ, uint8_t cell_type, char *payload, char *keys)
memcpy(circ->handshake_digest, cell.payload+DIGEST_LEN, DIGEST_LEN); memcpy(circ->handshake_digest, cell.payload+DIGEST_LEN, DIGEST_LEN);
connection_or_write_cell_to_buf(&cell, circ->p_conn); connection_or_write_cell_to_buf(&cell, circ->p_conn);
log_fn(LOG_DEBUG,"Finished sending 'created' cell."); debug(LD_CIRC,"Finished sending 'created' cell.");
if (!is_local_IP(circ->p_conn->addr) && if (!is_local_IP(circ->p_conn->addr) &&
tor_tls_is_server(circ->p_conn->tls)) { tor_tls_is_server(circ->p_conn->tls)) {
@ -925,19 +930,19 @@ new_route_len(double cw, uint8_t purpose, extend_info_t *exit,
purpose != CIRCUIT_PURPOSE_S_ESTABLISH_INTRO) purpose != CIRCUIT_PURPOSE_S_ESTABLISH_INTRO)
routelen++; routelen++;
#endif #endif
log_fn(LOG_DEBUG,"Chosen route length %d (%d routers available).",routelen, debug(LD_CIRC,"Chosen route length %d (%d routers available).",routelen,
smartlist_len(routers)); smartlist_len(routers));
num_acceptable_routers = count_acceptable_routers(routers); num_acceptable_routers = count_acceptable_routers(routers);
if (num_acceptable_routers < 2) { if (num_acceptable_routers < 2) {
log_fn(LOG_INFO,"Not enough acceptable routers (%d). Discarding this circuit.", info(LD_CIRC,"Not enough acceptable routers (%d). Discarding this circuit.",
num_acceptable_routers); num_acceptable_routers);
return -1; return -1;
} }
if (num_acceptable_routers < routelen) { if (num_acceptable_routers < routelen) {
log_fn(LOG_INFO,"Not enough routers: cutting routelen from %d to %d.", info(LD_CIRC,"Not enough routers: cutting routelen from %d to %d.",
routelen, num_acceptable_routers); routelen, num_acceptable_routers);
routelen = num_acceptable_routers; routelen = num_acceptable_routers;
} }
@ -1140,7 +1145,7 @@ choose_good_exit_server_general(routerlist_t *dir, int need_uptime,
++n_best_support; ++n_best_support;
} }
} }
log_fn(LOG_INFO, "Found %d servers that might support %d/%d pending connections.", info(LD_CIRC, "Found %d servers that might support %d/%d pending connections.",
n_best_support, best_support, n_pending_connections); n_best_support, best_support, n_pending_connections);
preferredexits = smartlist_create(); preferredexits = smartlist_create();
@ -1172,12 +1177,12 @@ choose_good_exit_server_general(routerlist_t *dir, int need_uptime,
if (best_support == -1) { if (best_support == -1) {
if (need_uptime || need_capacity) { if (need_uptime || need_capacity) {
log_fn(LOG_INFO, "We couldn't find any live%s%s routers; falling back to list of all routers.", info(LD_CIRC, "We couldn't find any live%s%s routers; falling back to list of all routers.",
need_capacity?", fast":"", need_capacity?", fast":"",
need_uptime?", stable":""); need_uptime?", stable":"");
return choose_good_exit_server_general(dir, 0, 0); return choose_good_exit_server_general(dir, 0, 0);
} }
log(LOG_NOTICE, "All routers are down or middleman -- choosing a doomed exit at random."); notice(LD_CIRC, "All routers are down or middleman -- choosing a doomed exit at random.");
} }
for (try = 0; try < 2; try++) { for (try = 0; try < 2; try++) {
/* try once to pick only from routers that satisfy a needed port, /* try once to pick only from routers that satisfy a needed port,
@ -1208,12 +1213,13 @@ choose_good_exit_server_general(routerlist_t *dir, int need_uptime,
smartlist_free(sl); smartlist_free(sl);
tor_free(n_supported); tor_free(n_supported);
if (router) { if (router) {
log_fn(LOG_INFO, "Chose exit server '%s'", router->nickname); info(LD_CIRC, "Chose exit server '%s'", router->nickname);
return router; return router;
} }
if (options->StrictExitNodes) if (options->StrictExitNodes) {
log_fn(LOG_WARN, "No exit routers seem to be running; can't choose an exit."); /* XXXX NM LD_DIR? */
warn(LD_CIRC, "No exit routers seem to be running; can't choose an exit.");
}
return NULL; return NULL;
} }
@ -1242,7 +1248,7 @@ choose_good_exit_server(uint8_t purpose, routerlist_t *dir,
options->_AllowUnverified & ALLOW_UNVERIFIED_RENDEZVOUS, 0); options->_AllowUnverified & ALLOW_UNVERIFIED_RENDEZVOUS, 0);
return r; return r;
} }
log_fn(LOG_WARN,"Bug: unhandled purpose %d", purpose); warn(LD_BUG,"Bug: unhandled purpose %d", purpose);
tor_fragile_assert(); tor_fragile_assert();
return NULL; return NULL;
} }
@ -1264,14 +1270,14 @@ onion_pick_cpath_exit(circuit_t *circ, extend_info_t *exit)
state->desired_path_len = r; state->desired_path_len = r;
if (exit) { /* the circuit-builder pre-requested one */ if (exit) { /* the circuit-builder pre-requested one */
log_fn(LOG_INFO,"Using requested exit node '%s'", exit->nickname); info(LD_CIRC,"Using requested exit node '%s'", exit->nickname);
exit = extend_info_dup(exit); exit = extend_info_dup(exit);
} else { /* we have to decide one */ } else { /* we have to decide one */
routerinfo_t *router = routerinfo_t *router =
choose_good_exit_server(circ->purpose, rl, choose_good_exit_server(circ->purpose, rl,
state->need_uptime, state->need_capacity); state->need_uptime, state->need_capacity);
if (!router) { if (!router) {
log_fn(LOG_WARN,"failed to choose an exit server"); warn(LD_CIRC,"failed to choose an exit server");
return -1; return -1;
} }
exit = extend_info_from_router(router); exit = extend_info_from_router(router);
@ -1309,7 +1315,7 @@ circuit_extend_to_new_exit(circuit_t *circ, extend_info_t *info)
circuit_append_new_exit(circ, info); circuit_append_new_exit(circ, info);
circ->state = CIRCUIT_STATE_BUILDING; circ->state = CIRCUIT_STATE_BUILDING;
if (circuit_send_next_onion_skin(circ)<0) { if (circuit_send_next_onion_skin(circ)<0) {
log_fn(LOG_WARN, "Couldn't extend circuit to new point '%s'.", warn(LD_CIRC, "Couldn't extend circuit to new point '%s'.",
info->nickname); info->nickname);
circuit_mark_for_close(circ); circuit_mark_for_close(circ);
return -1; return -1;
@ -1382,7 +1388,7 @@ choose_good_middle_server(uint8_t purpose,
tor_assert(_CIRCUIT_PURPOSE_MIN <= purpose && tor_assert(_CIRCUIT_PURPOSE_MIN <= purpose &&
purpose <= _CIRCUIT_PURPOSE_MAX); purpose <= _CIRCUIT_PURPOSE_MAX);
log_fn(LOG_DEBUG, "Contemplating intermediate hop: random choice."); debug(LD_CIRC, "Contemplating intermediate hop: random choice.");
excluded = smartlist_create(); excluded = smartlist_create();
if ((r = build_state_get_exit_router(state))) { if ((r = build_state_get_exit_router(state))) {
smartlist_add(excluded, r); smartlist_add(excluded, r);
@ -1490,12 +1496,12 @@ onion_extend_cpath(uint8_t purpose, crypt_path_t **head_ptr,
} }
if (cur_len >= state->desired_path_len) { if (cur_len >= state->desired_path_len) {
log_fn(LOG_DEBUG, "Path is complete: %d steps long", debug(LD_CIRC, "Path is complete: %d steps long",
state->desired_path_len); state->desired_path_len);
return 1; return 1;
} }
log_fn(LOG_DEBUG, "Path is %d long; we want %d", cur_len, debug(LD_CIRC, "Path is %d long; we want %d", cur_len,
state->desired_path_len); state->desired_path_len);
excludednodes = smartlist_create(); excludednodes = smartlist_create();
@ -1516,11 +1522,11 @@ onion_extend_cpath(uint8_t purpose, crypt_path_t **head_ptr,
smartlist_free(excludednodes); smartlist_free(excludednodes);
if (!info) { if (!info) {
log_fn(LOG_WARN,"Failed to find node for hop %d of our path. Discarding this circuit.", cur_len); warn(LD_CIRC,"Failed to find node for hop %d of our path. Discarding this circuit.", cur_len);
return -1; return -1;
} }
log_fn(LOG_DEBUG,"Chose router %s for hop %d (exit is %s)", debug(LD_CIRC,"Chose router %s for hop %d (exit is %s)",
info->nickname, cur_len+1, build_state_get_exit_nickname(state)); info->nickname, cur_len+1, build_state_get_exit_nickname(state));
onion_append_hop(head_ptr, info); onion_append_hop(head_ptr, info);
@ -1643,10 +1649,10 @@ pick_helper_nodes(void)
while (smartlist_len(helper_nodes) < options->NumHelperNodes) { while (smartlist_len(helper_nodes) < options->NumHelperNodes) {
routerinfo_t *entry = choose_good_entry_server(NULL); routerinfo_t *entry = choose_good_entry_server(NULL);
/* XXXX deal with duplicate entries. */ /* XXXX deal with duplicate entries. NM */
helper_node_t *helper = tor_malloc_zero(sizeof(helper_node_t)); helper_node_t *helper = tor_malloc_zero(sizeof(helper_node_t));
/* XXXX Downgrade this to info before release. */ /* XXXX Downgrade this to info before release. NM */
log_fn(LOG_NOTICE, "Chose '%s' as helper node.", entry->nickname); notice(LD_CIRC, "Chose '%s' as helper node.", entry->nickname);
strlcpy(helper->nickname, entry->nickname, sizeof(helper->nickname)); strlcpy(helper->nickname, entry->nickname, sizeof(helper->nickname));
memcpy(helper->identity, entry->identity_digest, DIGEST_LEN); memcpy(helper->identity, entry->identity_digest, DIGEST_LEN);
smartlist_add(helper_nodes, helper); smartlist_add(helper_nodes, helper);
@ -1708,7 +1714,7 @@ remove_dead_helpers(void)
if (why) { if (why) {
base16_encode(dbuf, sizeof(dbuf), helper->identity, DIGEST_LEN); base16_encode(dbuf, sizeof(dbuf), helper->identity, DIGEST_LEN);
format_local_iso_time(tbuf, since); format_local_iso_time(tbuf, since);
log_fn(LOG_WARN, "Helper node '%s' (%s) has been %s since %s; removing.", warn(LD_CIRC, "Helper node '%s' (%s) has been %s since %s; removing.",
helper->nickname, dbuf, why, tbuf); helper->nickname, dbuf, why, tbuf);
tor_free(helper); tor_free(helper);
smartlist_del(helper_nodes, i); smartlist_del(helper_nodes, i);
@ -1733,6 +1739,7 @@ helper_nodes_set_status_from_directory(void)
routerlist_t *routers; routerlist_t *routers;
time_t now; time_t now;
int changed = 0; int changed = 0;
int severity = LOG_NOTICE;
if (! helper_nodes) if (! helper_nodes)
return; return;
@ -1749,25 +1756,28 @@ helper_nodes_set_status_from_directory(void)
if (! helper->unlisted_since) { if (! helper->unlisted_since) {
helper->unlisted_since = time(NULL); helper->unlisted_since = time(NULL);
++changed; ++changed;
log_fn(LOG_WARN,"Helper node '%s' is not listed by directories", warn(LD_CIRC,"Helper node '%s' is not listed by directories",
helper->nickname); helper->nickname);
severity = LOG_WARN;
} }
} else { } else {
if (helper->unlisted_since) { if (helper->unlisted_since) {
log_fn(LOG_WARN,"Helper node '%s' is listed again by directories", warn(LD_CIRC,"Helper node '%s' is listed again by directories",
helper->nickname); helper->nickname);
++changed; ++changed;
severity = LOG_WARN;
} }
helper->unlisted_since = 0; helper->unlisted_since = 0;
if (! r->is_running) { if (! r->is_running) {
if (! helper->down_since) { if (! helper->down_since) {
helper->down_since = now; helper->down_since = now;
log_fn(LOG_WARN, "Helper node '%s' is now down.", helper->nickname); warn(LD_CIRC, "Helper node '%s' is now down.", helper->nickname);
++changed; ++changed;
severity = LOG_WARN;
} }
} else { } else {
if (helper->down_since) { if (helper->down_since) {
log_fn(LOG_WARN,"Helper node '%s' is up in latest directories", notice(LD_CIRC,"Helper node '%s' is up in latest directories",
helper->nickname); helper->nickname);
++changed; ++changed;
} }
@ -1777,7 +1787,7 @@ helper_nodes_set_status_from_directory(void)
}); });
if (changed) { if (changed) {
log_fn(LOG_WARN, " (%d/%d helpers are usable)", log_fn(severity, LD_CIRC, " (%d/%d helpers are usable)",
num_live_helpers(), smartlist_len(helper_nodes)); num_live_helpers(), smartlist_len(helper_nodes));
helper_nodes_changed(); helper_nodes_changed();
} }
@ -1801,8 +1811,8 @@ helper_node_set_status(const char *digest, int succeeded)
if (!memcmp(helper->identity, digest, DIGEST_LEN)) { if (!memcmp(helper->identity, digest, DIGEST_LEN)) {
if (succeeded) { if (succeeded) {
if (helper->down_since) { if (helper->down_since) {
/*XXXX shouldn't warn. */ /*XXXX shouldn't warn. NM */
log_fn(LOG_WARN, warn(LD_CIRC,
"Connection to formerly down helper node '%s' succeeded. " "Connection to formerly down helper node '%s' succeeded. "
"%d/%d helpers usable.", helper->nickname, "%d/%d helpers usable.", helper->nickname,
num_live_helpers(), smartlist_len(helper_nodes)); num_live_helpers(), smartlist_len(helper_nodes));
@ -1811,7 +1821,7 @@ helper_node_set_status(const char *digest, int succeeded)
helper->down_since = 0; helper->down_since = 0;
} else if (!helper->down_since) { } else if (!helper->down_since) {
helper->down_since = time(NULL); helper->down_since = time(NULL);
log_fn(LOG_WARN, warn(LD_CIRC,
"Connection to helper node '%s' failed. %d/%d helpers usable.", "Connection to helper node '%s' failed. %d/%d helpers usable.",
helper->nickname, num_live_helpers(), smartlist_len(helper_nodes)); helper->nickname, num_live_helpers(), smartlist_len(helper_nodes));
helper_nodes_changed(); helper_nodes_changed();
@ -1841,7 +1851,7 @@ choose_random_helper(void)
if (! smartlist_len(live_helpers)) { if (! smartlist_len(live_helpers)) {
/* XXXX Is this right? What if network is down? */ /* XXXX Is this right? What if network is down? */
log_fn(LOG_WARN, "No functional helper nodes found; picking a new set."); warn(LD_CIRC, "No functional helper nodes found; picking a new set.");
clear_helper_nodes(); clear_helper_nodes();
pick_helper_nodes(); pick_helper_nodes();
goto retry; goto retry;

50
src/or/circuitlist.c
View File

@ -188,7 +188,7 @@ circuit_state_to_string(int state)
case CIRCUIT_STATE_OR_WAIT: return "connecting to firsthop"; case CIRCUIT_STATE_OR_WAIT: return "connecting to firsthop";
case CIRCUIT_STATE_OPEN: return "open"; case CIRCUIT_STATE_OPEN: return "open";
default: default:
warn(LD_GENERAL, "Bug: unknown circuit state %d", state); warn(LD_BUG, "Bug: unknown circuit state %d", state);
tor_snprintf(buf, sizeof(buf), "unknown state [%d]", state); tor_snprintf(buf, sizeof(buf), "unknown state [%d]", state);
return buf; return buf;
} }
@ -344,8 +344,8 @@ circuit_get_by_global_id(uint32_t id)
* - circ is attached to <b>conn</b>, either as p_conn or n_conn. * - circ is attached to <b>conn</b>, either as p_conn or n_conn.
* Return NULL if no such circuit exists. * Return NULL if no such circuit exists.
*/ */
circuit_t * static INLINE circuit_t *
circuit_get_by_circid_orconn(uint16_t circ_id, connection_t *conn) circuit_get_by_circid_orconn_impl(uint16_t circ_id, connection_t *conn)
{ {
orconn_circid_circuit_map_t search; orconn_circid_circuit_map_t search;
orconn_circid_circuit_map_t *found; orconn_circid_circuit_map_t *found;
@ -362,7 +362,7 @@ circuit_get_by_circid_orconn(uint16_t circ_id, connection_t *conn)
found = RB_FIND(orconn_circid_tree, &orconn_circid_circuit_map, &search); found = RB_FIND(orconn_circid_tree, &orconn_circid_circuit_map, &search);
_last_circid_orconn_ent = found; _last_circid_orconn_ent = found;
} }
if (found && found->circuit && !found->circuit->marked_for_close) if (found && found->circuit)
return found->circuit; return found->circuit;
/* The rest of this can be replaced with /* The rest of this can be replaced with
@ -371,21 +371,49 @@ circuit_get_by_circid_orconn(uint16_t circ_id, connection_t *conn)
{ {
circuit_t *circ; circuit_t *circ;
for (circ=global_circuitlist;circ;circ = circ->next) { for (circ=global_circuitlist;circ;circ = circ->next) {
if (circ->marked_for_close)
continue;
if (circ->p_conn == conn && circ->p_circ_id == circ_id) { if (circ->p_conn == conn && circ->p_circ_id == circ_id) {
warn(LD_GENERAL, "circuit matches p_conn, but not in tree (Bug!)"); warn(LD_BUG, "circuit matches p_conn, but not in tree (Bug!)");
return circ; return circ;
} }
if (circ->n_conn == conn && circ->n_circ_id == circ_id) { if (circ->n_conn == conn && circ->n_circ_id == circ_id) {
warn(LD_GENERAL, "circuit matches n_conn, but not in tree (Bug!)"); warn(LD_BUG, "circuit matches n_conn, but not in tree (Bug!)");
return circ; return circ;
} }
} }
return NULL; return NULL;
} }
}
/** Return a circ such that:
* - circ-\>n_circ_id or circ-\>p_circ_id is equal to <b>circ_id</b>, and
* - circ is attached to <b>conn</b>, either as p_conn or n_conn.
* - circ is not marked for close.
* Return NULL if no such circuit exists.
*/
circuit_t *
circuit_get_by_circid_orconn(uint16_t circ_id, connection_t *conn)
{
circuit_t *circ = circuit_get_by_circid_orconn_impl(circ_id, conn);
if (circ->marked_for_close)
return NULL;
else
return circ;
}
/** Return true iff there is a circ such that
* - circ-\>n_circ_id or circ-\>p_circ_id is equal to <b>circ_id</b>, and
* - circ is attached to <b>conn</b>, either as p_conn or n_conn.
* Return NULL if no such circuit exists.
*/
int
circuit_id_used_on_conn(uint16_t circ_id, connection_t *conn)
{
circuit_t *circ = circuit_get_by_circid_orconn_impl(circ_id, conn);
if (circ && circ->marked_for_close)
log_fn(LOG_NOTICE, LD_CIRC,
"I was about to re-use a circuit ID that had been marked."
" Good thing we fixed that bug!");
return circ != NULL;
} }
/** Return the circuit that a given edge connection is using. */ /** Return the circuit that a given edge connection is using. */
@ -402,7 +430,7 @@ circuit_get_by_edge_conn(connection_t *conn)
/* return NULL; */ /* return NULL; */
circ = circuit_get_by_conn(conn); circ = circuit_get_by_conn(conn);
if (circ) { if (circ) {
warn(LD_GENERAL, "BUG: conn->on_circuit==NULL, but there was in fact a circuit there."); warn(LD_BUG, "BUG: conn->on_circuit==NULL, but there was in fact a circuit there.");
} }
return circ; return circ;
} }
@ -614,7 +642,7 @@ _circuit_mark_for_close(circuit_t *circ, int line, const char *file)
tor_assert(file); tor_assert(file);
if (circ->marked_for_close) { if (circ->marked_for_close) {
log(LOG_WARN,LD_GENERAL, log(LOG_WARN,LD_BUG,
"Duplicate call to circuit_mark_for_close at %s:%d" "Duplicate call to circuit_mark_for_close at %s:%d"
" (first at %s:%d)", file, line, " (first at %s:%d)", file, line,
circ->marked_for_close_file, circ->marked_for_close); circ->marked_for_close_file, circ->marked_for_close);

3
src/or/or.h
View File

@ -1379,7 +1379,7 @@ void assert_buf_ok(buf_t *buf);
/********************************* circuitbuild.c **********************/ /********************************* circuitbuild.c **********************/
char *circuit_list_path(circuit_t *circ, int verbose); char *circuit_list_path(circuit_t *circ, int verbose);
void circuit_log_path(int severity, circuit_t *circ); void circuit_log_path(int severity, int domain, circuit_t *circ);
void circuit_rep_hist_note_result(circuit_t *circ); void circuit_rep_hist_note_result(circuit_t *circ);
void circuit_dump_by_conn(connection_t *conn, int severity); void circuit_dump_by_conn(connection_t *conn, int severity);
circuit_t *circuit_init(uint8_t purpose, int need_uptime, circuit_t *circuit_init(uint8_t purpose, int need_uptime,
@ -1425,6 +1425,7 @@ void circuit_set_circid_orconn(circuit_t *circ, uint16_t id,
void circuit_close_all_marked(void); void circuit_close_all_marked(void);
circuit_t *circuit_new(uint16_t p_circ_id, connection_t *p_conn); circuit_t *circuit_new(uint16_t p_circ_id, connection_t *p_conn);
circuit_t *circuit_get_by_circid_orconn(uint16_t circ_id, connection_t *conn); circuit_t *circuit_get_by_circid_orconn(uint16_t circ_id, connection_t *conn);
int circuit_id_used_on_conn(uint16_t circ_id, connection_t *conn);
circuit_t *circuit_get_by_edge_conn(connection_t *conn); circuit_t *circuit_get_by_edge_conn(connection_t *conn);
circuit_t *circuit_get_by_conn(connection_t *conn); circuit_t *circuit_get_by_conn(connection_t *conn);
circuit_t *circuit_get_by_global_id(uint32_t id); circuit_t *circuit_get_by_global_id(uint32_t id);