tor-commits April 2011

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883 discussions

[tor/release-0.2.2] Merge branch 'maint-0.2.2' into release-0.2.2
by arma＠torproject.org 08 Apr '11

08 Apr '11

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[tor/release-0.2.2] Improve a few comments
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 9facf8918f959cc9d9c2674afbd0630718460dc3 Author: Sebastian Hahn <sebastian(a)torproject.org> Date: Mon Mar 28 19:28:04 2011 +0200 Improve a few comments --- src/common/address.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/common/address.c b/src/common/address.c index a089260..adc0ef0 100644 --- a/src/common/address.c +++ b/src/common/address.c @@ -51,11 +51,11 @@ /** Convert the tor_addr_t in a, with port in port, into a * sockaddr object in *sa_out of object size len. If not enough - * room is available in sa_out, or on error, return 0 On success, return + * room is available in sa_out, or on error, return 0. On success, return * the length of the sockaddr. * - * Interface note: ordinarly, we return -1 for error. We can't do that here, - * since socklen is unsigned on some platforms. + * Interface note: ordinarily, we return -1 for error. We can't do that here, + * since socklen_t is unsigned on some platforms. **/ socklen_t tor_addr_to_sockaddr(const tor_addr_t *a,

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[tor/release-0.2.2] Merge remote-tracking branch 'public/bug2402_again' into maint-0.2.1
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 32341ac467d5fe51fa674eed4ca20db61ff5486b Merge: 0cdd262 02d93ca Author: Nick Mathewson <nickm(a)torproject.org> Date: Wed Apr 6 16:13:22 2011 -0400 Merge remote-tracking branch 'public/bug2402_again' into maint-0.2.1 changes/bug2402 | 4 --- changes/bug2402_redux | 6 +++++ src/or/Makefile.am | 60 ++++++++++-------------------------------------- src/or/config.c | 11 ++++++++- src/or/router.c | 2 - 5 files changed, 29 insertions(+), 54 deletions(-)

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[tor/release-0.2.2] Merge maint-0.2.1 for bug2402_again fixes . Use "-s ours" so we don't actually take the patch.
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit de1c36ff6062ee4b45e1e1f637a7f168e104d7b1 Merge: 9d2b384 32341ac Author: Nick Mathewson <nickm(a)torproject.org> Date: Wed Apr 6 16:15:48 2011 -0400 Merge maint-0.2.1 for bug2402_again fixes . Use "-s ours" so we don't actually take the patch.

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[tor/release-0.2.2] Add a missing cast to silence the compiler
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 8d81831d715adf9cb374100e23cc2b118efe3101 Author: Sebastian Hahn <sebastian(a)torproject.org> Date: Mon Mar 28 18:20:50 2011 +0200 Add a missing cast to silence the compiler --- src/or/connection.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/or/connection.c b/src/or/connection.c index 084237d..6e7bbd5 100644 --- a/src/or/connection.c +++ b/src/or/connection.c @@ -2790,7 +2790,7 @@ connection_handle_write_impl(connection_t *conn, int force) edge_connection_t *edge_conn = TO_EDGE_CONN(conn); /* Check for overflow: */ if (PREDICT_LIKELY(UINT32_MAX - edge_conn->n_written > n_written)) - edge_conn->n_written += n_written; + edge_conn->n_written += (int)n_written; else edge_conn->n_written = UINT32_MAX; }

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[tor/release-0.2.2] Fix handling of StreamID exhaustion.
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 432734279d3688fafb466a23f43585ff509ff693 Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 17:57:15 2011 -0400 Fix handling of StreamID exhaustion. Since svn r1475/git 5b6099e8 in tor-0.0.6, we have responded to an exhaustion of all 65535 stream IDs on a circuit by marking that circuit for close. That's not the right response. Instead, we should mark the circuit as "too dirty for new circuits". Of course in reality this isn't really right either. If somebody has managed to cram 65535 streams onto a circuit, the circuit is probably not going to work well for any of those streams, so maybe we should be limiting the number of streams on an origin circuit concurrently. Also, closing the stream in this case is probably the wrong thing to do as well, but fixing that can also wait. --- changes/full_ap_circuits | 6 ++++++ src/or/connection_edge.c | 18 ++++++++++++++---- 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/changes/full_ap_circuits b/changes/full_ap_circuits new file mode 100644 index 0000000..379a1a1 --- /dev/null +++ b/changes/full_ap_circuits @@ -0,0 +1,6 @@ + o Minor bugfixes + - When a client finds that an origin circuit has run out of 16-bit + stream IDs, we now mark it as unusable for new streams. + Previously, we would try to close the entire circuit. Bugfix on + Tor version 0.0.6. + diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index af0cfbe..72e2c8a 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -2164,9 +2164,14 @@ connection_ap_handshake_send_begin(edge_connection_t *ap_conn) ap_conn->stream_id = get_unique_stream_id_by_circ(circ); if (ap_conn->stream_id==0) { + /* XXXX023 Instead of closing this stream, we should make it get + * retried on another circuit. */ connection_mark_unattached_ap(ap_conn, END_STREAM_REASON_INTERNAL); - /*XXXX022 _close_ the circuit because it's full? That sounds dumb. */ - circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_RESOURCELIMIT); + + /* Mark this circuit "unusable for new streams". */ + /* XXXX023 this is a kludgy way to do this. */ + tor_assert(circ->_base.timestamp_dirty); + circ->_base.timestamp_dirty -= get_options()->MaxCircuitDirtiness; return -1; } @@ -2224,9 +2229,14 @@ connection_ap_handshake_send_resolve(edge_connection_t *ap_conn) ap_conn->stream_id = get_unique_stream_id_by_circ(circ); if (ap_conn->stream_id==0) { + /* XXXX023 Instead of closing this stream, we should make it get + * retried on another circuit. */ connection_mark_unattached_ap(ap_conn, END_STREAM_REASON_INTERNAL); - /*XXXX022 _close_ the circuit because it's full? That sounds dumb. */ - circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_RESOURCELIMIT); + + /* Mark this circuit "unusable for new streams". */ + /* XXXX023 this is a kludgy way to do this. */ + tor_assert(circ->_base.timestamp_dirty); + circ->_base.timestamp_dirty -= get_options()->MaxCircuitDirtiness; return -1; }

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[tor/release-0.2.2] Fix a compile warning on OS X 10.6
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 286d44402e829488abe802efd1607eabbc98f1d1 Author: Sebastian Hahn <sebastian(a)torproject.org> Date: Thu Apr 7 05:30:49 2011 +0200 Fix a compile warning on OS X 10.6 --- src/or/circuituse.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/or/circuituse.c b/src/or/circuituse.c index 447ec84..3d5db98 100644 --- a/src/or/circuituse.c +++ b/src/or/circuituse.c @@ -291,7 +291,7 @@ circuit_expire_building(void) long ms = tor_lround(msec); \ struct timeval diff; \ diff.tv_sec = ms / 1000; \ - diff.tv_usec = (ms % 1000) * 1000; \ + diff.tv_usec = (int)((ms % 1000) * 1000); \ timersub(&now, &diff, &target); \ } while (0)

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[tor/release-0.2.2] Allow controllers a more up-to-date view of bridge usage.
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 118d8ffdcb74137a36d22928ce6f46897809391e Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Mar 15 22:39:22 2011 -0400 Allow controllers a more up-to-date view of bridge usage. Instead of answering GETINFO requests about our geoip usage only after running for 24 hours, this patch makes us answer GETINFO requests immediately. We still round and quantize as before. Implements bug2711. Also, refactor the heck out of the bridge usage formatting code. No longer should we need to do a generate-parse-and-regenerate cycle to get the controller string, and that lets us simplify the code a lot. --- changes/feature2711 | 4 + src/or/control.c | 4 +- src/or/geoip.c | 172 ++++++++++++++++++++++++++++----------------------- src/or/geoip.h | 2 +- 4 files changed, 101 insertions(+), 81 deletions(-) diff --git a/changes/feature2711 b/changes/feature2711 new file mode 100644 index 0000000..7cdcfbf --- /dev/null +++ b/changes/feature2711 @@ -0,0 +1,4 @@ + o Minor features + - Export GeoIP information on usage to bridge controller even if we have + not yet been running for 24 hours. + diff --git a/src/or/control.c b/src/or/control.c index fb9c1ae..8f3af0b 100644 --- a/src/or/control.c +++ b/src/or/control.c @@ -1785,12 +1785,12 @@ getinfo_helper_events(control_connection_t *control_conn, "information", question); } } else if (!strcmp(question, "status/clients-seen")) { - const char *bridge_stats = geoip_get_bridge_stats_controller(time(NULL)); + char *bridge_stats = geoip_get_bridge_stats_controller(time(NULL)); if (!bridge_stats) { *errmsg = "No bridge-client stats available"; return -1; } - *answer = tor_strdup(bridge_stats); + *answer = bridge_stats; } else { return 0; } diff --git a/src/or/geoip.c b/src/or/geoip.c index 654241c..28f570a 100644 --- a/src/or/geoip.c +++ b/src/or/geoip.c @@ -1083,14 +1083,14 @@ geoip_bridge_stats_term(void) start_of_bridge_stats_interval = 0; } -/** Parse the bridge statistics as they are written to extra-info - * descriptors for being returned to controller clients. Return the - * controller string if successful, or NULL otherwise. */ -static char * -parse_bridge_stats_controller(const char *stats_str, time_t now) +/** Validate a bridge statistics string as it would be written to a + * current extra-info descriptor. Return 1 if the string is valid and + * recent enough, or 0 otherwise. */ +static int +validate_bridge_stats(const char *stats_str, time_t now) { char stats_end_str[ISO_TIME_LEN+1], stats_start_str[ISO_TIME_LEN+1], - *controller_str, *eos, *eol, *summary; + *eos; const char *BRIDGE_STATS_END = "bridge-stats-end "; const char *BRIDGE_IPS = "bridge-ips "; @@ -1104,63 +1104,90 @@ parse_bridge_stats_controller(const char *stats_str, time_t now) "bridge-stats-end YYYY-MM-DD HH:MM:SS (N s)" */ tmp = find_str_at_start_of_line(stats_str, BRIDGE_STATS_END); if (!tmp) - return NULL; + return 0; tmp += strlen(BRIDGE_STATS_END); if (strlen(tmp) < ISO_TIME_LEN + 6) - return NULL; + return 0; strlcpy(stats_end_str, tmp, sizeof(stats_end_str)); if (parse_iso_time(stats_end_str, &stats_end_time) < 0) - return NULL; + return 0; if (stats_end_time < now - (25*60*60) || stats_end_time > now + (1*60*60)) - return NULL; + return 0; seconds = (int)strtol(tmp + ISO_TIME_LEN + 2, &eos, 10); if (!eos || seconds < 23*60*60) - return NULL; + return 0; format_iso_time(stats_start_str, stats_end_time - seconds); /* Parse: "bridge-ips CC=N,CC=N,..." */ tmp = find_str_at_start_of_line(stats_str, BRIDGE_IPS); - if (tmp) { - tmp += strlen(BRIDGE_IPS); - tmp = eat_whitespace_no_nl(tmp); - eol = strchr(tmp, '\n'); - if (eol) - summary = tor_strndup(tmp, eol-tmp); - else - summary = tor_strdup(tmp); - } else { + if (!tmp) { /* Look if there is an empty "bridge-ips" line */ tmp = find_str_at_start_of_line(stats_str, BRIDGE_IPS_EMPTY_LINE); if (!tmp) - return NULL; - summary = tor_strdup(""); + return 0; } - tor_asprintf(&controller_str, - "TimeStarted=\"%s\" CountrySummary=%s", - stats_start_str, summary); - tor_free(summary); - return controller_str; + return 1; } /** Most recent bridge statistics formatted to be written to extra-info * descriptors. */ static char *bridge_stats_extrainfo = NULL; -/** Most recent bridge statistics formatted to be returned to controller - * clients. */ -static char *bridge_stats_controller = NULL; +/** Return a newly allocated string holding our bridge usage stats by country + * in a format suitable for inclusion in an extrainfo document. Return NULL on + * failure. */ +static char * +format_bridge_stats_extrainfo(time_t now) +{ + char *out = NULL, *data = NULL; + long duration = now - start_of_bridge_stats_interval; + char written[ISO_TIME_LEN+1]; + + if (duration < 0) + return NULL; + + format_iso_time(written, now); + data = geoip_get_client_history(GEOIP_CLIENT_CONNECT); + + tor_asprintf(&out, + "bridge-stats-end %s (%ld s)\n" + "bridge-ips %s\n", + written, duration, + data ? data : ""); + tor_free(data); + + return out; +} + +/** Return a newly allocated string holding our bridge usage stats by country + * in a format suitable for the answer to a controller request. Return NULL on + * failure. */ +static char * +format_bridge_stats_controller(time_t now) +{ + char *out = NULL, *data = NULL; + char started[ISO_TIME_LEN+1]; + (void) now; + + format_iso_time(started, start_of_bridge_stats_interval); + data = geoip_get_client_history(GEOIP_CLIENT_CONNECT); + + tor_asprintf(&out, + "TimeStarted=\"%s\" CountrySummary=%s", + started, data ? data : ""); + tor_free(data); + return out; +} /** Write bridge statistics to $DATADIR/stats/bridge-stats and return * when we should next try to write statistics. */ time_t geoip_bridge_stats_write(time_t now) { - char *statsdir = NULL, *filename = NULL, *data = NULL, - written[ISO_TIME_LEN+1], *out = NULL, *controller_str; - size_t len; + char *filename = NULL, *val = NULL, *statsdir = NULL; /* Check if 24 hours have passed since starting measurements. */ if (now < start_of_bridge_stats_interval + WRITE_STATS_INTERVAL) @@ -1169,64 +1196,54 @@ geoip_bridge_stats_write(time_t now) /* Discard all items in the client history that are too old. */ geoip_remove_old_clients(start_of_bridge_stats_interval); + /* Generate formatted string */ + val = format_bridge_stats_extrainfo(now); + if (val == NULL) + goto done; + + /* Update the stored value. */ + tor_free(bridge_stats_extrainfo); + bridge_stats_extrainfo = val; + start_of_bridge_stats_interval = now; + + /* Write it to disk. */ statsdir = get_datadir_fname("stats"); if (check_private_dir(statsdir, CPD_CREATE) < 0) goto done; filename = get_datadir_fname2("stats", "bridge-stats"); - data = geoip_get_client_history(GEOIP_CLIENT_CONNECT); - format_iso_time(written, now); - len = strlen("bridge-stats-end (999999 s)\nbridge-ips \n") + - ISO_TIME_LEN + (data ? strlen(data) : 0) + 42; - out = tor_malloc(len); - if (tor_snprintf(out, len, "bridge-stats-end %s (%u s)\nbridge-ips %s\n", - written, (unsigned) (now - start_of_bridge_stats_interval), - data ? data : "") < 0) - goto done; - write_str_to_file(filename, out, 0); - controller_str = parse_bridge_stats_controller(out, now); - if (!controller_str) - goto done; - start_of_bridge_stats_interval = now; - tor_free(bridge_stats_extrainfo); - tor_free(bridge_stats_controller); - bridge_stats_extrainfo = out; - out = NULL; - bridge_stats_controller = controller_str; - control_event_clients_seen(controller_str); + + write_str_to_file(filename, bridge_stats_extrainfo, 0); + + /* Tell the controller, "hey, there are clients!" */ + { + char *controller_str = format_bridge_stats_controller(now); + if (controller_str) + control_event_clients_seen(controller_str); + tor_free(controller_str); + } done: tor_free(filename); tor_free(statsdir); - tor_free(data); - tor_free(out); - return start_of_bridge_stats_interval + - WRITE_STATS_INTERVAL; + + return start_of_bridge_stats_interval + WRITE_STATS_INTERVAL; } /** Try to load the most recent bridge statistics from disk, unless we - * have finished a measurement interval lately. */ + * have finished a measurement interval lately, and check whether they + * are still recent enough. */ static void load_bridge_stats(time_t now) { - char *statsdir, *fname=NULL, *contents, *controller_str; + char *fname, *contents; if (bridge_stats_extrainfo) return; - statsdir = get_datadir_fname("stats"); - if (check_private_dir(statsdir, CPD_CREATE) < 0) - goto done; + fname = get_datadir_fname2("stats", "bridge-stats"); contents = read_file_to_str(fname, RFTS_IGNORE_MISSING, NULL); - if (contents) { - controller_str = parse_bridge_stats_controller(contents, now); - if (controller_str) { - bridge_stats_extrainfo = contents; - bridge_stats_controller = controller_str; - } else { - tor_free(contents); - } - } - done: + if (contents && validate_bridge_stats(contents, now)) + bridge_stats_extrainfo = contents; + tor_free(fname); - tor_free(statsdir); } /** Return most recent bridge statistics for inclusion in extra-info @@ -1238,13 +1255,12 @@ geoip_get_bridge_stats_extrainfo(time_t now) return bridge_stats_extrainfo; } -/** Return most recent bridge statistics to be returned to controller - * clients, or NULL if we don't have recent bridge statistics. */ -const char * +/** Return a new string containing the recent bridge statistics to be returned + * to controller clients, or NULL if we don't have any bridge statistics. */ +char * geoip_get_bridge_stats_controller(time_t now) { - load_bridge_stats(now); - return bridge_stats_controller; + return format_bridge_stats_controller(now); } /** Start time of entry stats or 0 if we're not collecting entry diff --git a/src/or/geoip.h b/src/or/geoip.h index bafbeea..24f7c5b 100644 --- a/src/or/geoip.h +++ b/src/or/geoip.h @@ -51,7 +51,7 @@ void geoip_bridge_stats_init(time_t now); time_t geoip_bridge_stats_write(time_t now); void geoip_bridge_stats_term(void); const char *geoip_get_bridge_stats_extrainfo(time_t); -const char *geoip_get_bridge_stats_controller(time_t); +char *geoip_get_bridge_stats_controller(time_t); #endif

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[tor/release-0.2.2] Comment out ancient asserts for bug 930; resolve an xxx021
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit c4bd067359b07f6a57adf9d444d2a46e514043ff Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 15:44:02 2011 -0400 Comment out ancient asserts for bug 930; resolve an xxx021 --- src/common/memarea.c | 7 +++++-- 1 files changed, 5 insertions(+), 2 deletions(-) diff --git a/src/common/memarea.c b/src/common/memarea.c index 6893639..a6b8c4e 100644 --- a/src/common/memarea.c +++ b/src/common/memarea.c @@ -59,7 +59,9 @@ realign_pointer(void *ptr) { uintptr_t x = (uintptr_t)ptr; x = (x+MEMAREA_ALIGN_MASK) & ~MEMAREA_ALIGN_MASK; - tor_assert(((void*)x) >= ptr); // XXXX021 remove this once bug 930 is solved + /* Reinstate this if bug 930 ever reappears + tor_assert(((void*)x) >= ptr); + */ return (void*)x; } @@ -241,9 +243,10 @@ memarea_alloc(memarea_t *area, size_t sz) } result = chunk->next_mem; chunk->next_mem = chunk->next_mem + sz; - // XXXX021 remove these once bug 930 is solved. + /* Reinstate these if bug 930 ever comes back tor_assert(chunk->next_mem >= chunk->u.mem); tor_assert(chunk->next_mem <= chunk->u.mem+chunk->mem_size); + */ chunk->next_mem = realign_pointer(chunk->next_mem); return result; }

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[tor/release-0.2.2] Remove workaround code for bug539
by arma＠torproject.org 08 Apr '11

08 Apr '11

commit 550749555cd57a1f82fe6c08e866ae14456ed439 Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 17:11:04 2011 -0400 Remove workaround code for bug539 We fixed bug 539 (where directories would say "503" but send data anyway) back in 0.2.0.16-alpha/0.1.2.19. Because most directory versions were affected, we added workaround to make sure that we examined the contents of 503-replies to make sure there wasn't any data for them to find. But now that such routers are nonexistent, we can remove this code. (Even if somebody fired up an 0.1.2.19 directory cache today, it would still be fine to ignore data in its erroneous 503 replies.) --- changes/bug539_removal | 6 ++++++ src/or/directory.c | 33 +++++++++++++-------------------- 2 files changed, 19 insertions(+), 20 deletions(-) diff --git a/changes/bug539_removal b/changes/bug539_removal new file mode 100644 index 0000000..dbff43d --- /dev/null +++ b/changes/bug539_removal @@ -0,0 +1,6 @@ + o Removed code + - Removed workaround code to handle directory responses from + servers that had bug 539 (they would send HTTP status 503 + responses _and_ send a body too). Since only server versions + before 0.2.0.16-alpha/0.1.2.19 were affected, there is no longer + reason to keep the workaround in place. diff --git a/src/or/directory.c b/src/or/directory.c index 1347c8b..8f33a60 100644 --- a/src/or/directory.c +++ b/src/or/directory.c @@ -1539,26 +1539,19 @@ connection_dir_client_reached_eof(dir_connection_t *conn) (void) skewed; /* skewed isn't used yet. */ if (status_code == 503) { - if (body_len < 16) { - routerstatus_t *rs; - trusted_dir_server_t *ds; - log_info(LD_DIR,"Received http status code %d (%s) from server " - "'%s:%d'. I'll try again soon.", - status_code, escaped(reason), conn->_base.address, - conn->_base.port); - if ((rs = router_get_consensus_status_by_id(conn->identity_digest))) - rs->last_dir_503_at = now; - if ((ds = router_get_trusteddirserver_by_digest(conn->identity_digest))) - ds->fake_status.last_dir_503_at = now; + routerstatus_t *rs; + trusted_dir_server_t *ds; + log_info(LD_DIR,"Received http status code %d (%s) from server " + "'%s:%d'. I'll try again soon.", + status_code, escaped(reason), conn->_base.address, + conn->_base.port); + if ((rs = router_get_consensus_status_by_id(conn->identity_digest))) + rs->last_dir_503_at = now; + if ((ds = router_get_trusteddirserver_by_digest(conn->identity_digest))) + ds->fake_status.last_dir_503_at = now; - tor_free(body); tor_free(headers); tor_free(reason); - return -1; - } - /* XXXX022 Remove this once every server with bug 539 is obsolete. */ - log_info(LD_DIR, "Server at '%s:%d' sent us a 503 response, but included " - "a body anyway. We'll pretend it gave us a 200.", - conn->_base.address, conn->_base.port); - status_code = 200; + tor_free(body); tor_free(headers); tor_free(reason); + return -1; } plausible = body_is_plausible(body, body_len, conn->_base.purpose);

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tor-commits April 2011