April 2011 - tor-commits - lists.torproject.org

[tor/master] Fixup tor_addr_to_sockaddr return convention
by nickm＠torproject.org 07 Apr '11

07 Apr '11

commit 41380fa3b3bc3647699116866afda4286ba90f8b Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 15:41:19 2011 -0400 Fixup tor_addr_to_sockaddr return convention --- src/common/address.c | 18 ++++++++++-------- src/or/dns.c | 2 +- 2 files changed, 11 insertions(+), 9 deletions(-) diff --git a/src/common/address.c b/src/common/address.c index 0046d2d..a4f8d34 100644 --- a/src/common/address.c +++ b/src/common/address.c @@ -50,11 +50,13 @@ #include <assert.h> /** Convert the tor_addr_t in a, with port in port, into a - * socklen object in *sa_out of object size len. If not enough - * room is free, or on error, return -1. Else return the length of the - * sockaddr. */ -/* XXXX021 This returns socklen_t. socklen_t is sometimes unsigned. This - * function claims to return -1 sometimes. Problematic! */ + * 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 + * 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. + **/ socklen_t tor_addr_to_sockaddr(const tor_addr_t *a, uint16_t port, @@ -65,7 +67,7 @@ tor_addr_to_sockaddr(const tor_addr_t *a, if (family == AF_INET) { struct sockaddr_in *sin; if (len < (int)sizeof(struct sockaddr_in)) - return -1; + return 0; sin = (struct sockaddr_in *)sa_out; memset(sin, 0, sizeof(struct sockaddr_in)); #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN @@ -78,7 +80,7 @@ tor_addr_to_sockaddr(const tor_addr_t *a, } else if (family == AF_INET6) { struct sockaddr_in6 *sin6; if (len < (int)sizeof(struct sockaddr_in6)) - return -1; + return 0; sin6 = (struct sockaddr_in6 *)sa_out; memset(sin6, 0, sizeof(struct sockaddr_in6)); #ifdef HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN @@ -89,7 +91,7 @@ tor_addr_to_sockaddr(const tor_addr_t *a, memcpy(&sin6->sin6_addr, tor_addr_to_in6(a), sizeof(struct in6_addr)); return sizeof(struct sockaddr_in6); } else { - return -1; + return 0; } } diff --git a/src/or/dns.c b/src/or/dns.c index dcccd13..61c8f32 100644 --- a/src/or/dns.c +++ b/src/or/dns.c @@ -1206,7 +1206,7 @@ configure_nameservers(int force) struct sockaddr_storage ss; socklen = tor_addr_to_sockaddr(&addr, 0, (struct sockaddr *)&ss, sizeof(ss)); - if (socklen < 0) { + if (socklen <= 0) { log_warn(LD_BUG, "Couldn't convert outbound bind address to sockaddr." " Ignoring."); } else {

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[tor/master] Remove the "fuzzy time" code
by nickm＠torproject.org 07 Apr '11

07 Apr '11

commit 444e46d96d05c3e12eca02769512c74f2eb16b48 Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 15:27:06 2011 -0400 Remove the "fuzzy time" code It was the start of a neat idea, but it only got used in 3 places, none of which really needed it. --- changes/kill_ftime | 7 ++++ src/common/util.c | 77 ------------------------------------------------ src/common/util.h | 10 ------ src/or/networkstatus.c | 6 +++- src/or/routerlist.c | 4 +- 5 files changed, 14 insertions(+), 90 deletions(-) diff --git a/changes/kill_ftime b/changes/kill_ftime new file mode 100644 index 0000000..47f4769 --- /dev/null +++ b/changes/kill_ftime @@ -0,0 +1,7 @@ + o Code simplification and refactoring + - Remove the old 'fuzzy time' logic. It was supposed to be used + for handling calculations where we have a known amount of clock + skew and an allowed amount of unknown skew. But we only used it + in three places, and we never adjusted the known/unknown skew + values. This is still something we might want to do someday, + but if we do, we'll want to do it differently. diff --git a/src/common/util.c b/src/common/util.c index abd87ea..38c0ad0 100644 --- a/src/common/util.c +++ b/src/common/util.c @@ -1511,83 +1511,6 @@ update_approx_time(time_t now) #endif /* ===== - * Fuzzy time - * XXXX022 Use this consistently or rip most of it out. - * ===== */ - -/* In a perfect world, everybody would run NTP, and NTP would be perfect, so - * if we wanted to know "Is the current time before time X?" we could just say - * "time(NULL) < X". - * - * But unfortunately, many users are running Tor in an imperfect world, on - * even more imperfect computers. Hence, we need to track time oddly. We - * model the user's computer as being "skewed" from accurate time by - * -ftime_skew seconds, such that our best guess of the current time is - * time(NULL)+ftime_skew. We also assume that our measurements of time may - * have up to ftime_slop seconds of inaccuracy; IOW, our window of - * estimate for the current time is now + ftime_skew +/- ftime_slop. - */ -/** Our current estimate of our skew, such that we think the current time is - * closest to time(NULL)+ftime_skew. */ -static int ftime_skew = 0; -/** Tolerance during time comparisons, in seconds. */ -static int ftime_slop = 60; -/** Set the largest amount of sloppiness we'll allow in fuzzy time - * comparisons. */ -void -ftime_set_maximum_sloppiness(int seconds) -{ - tor_assert(seconds >= 0); - ftime_slop = seconds; -} -/** Set the amount by which we believe our system clock to differ from - * real time. */ -void -ftime_set_estimated_skew(int seconds) -{ - ftime_skew = seconds; -} -#if 0 -void -ftime_get_window(time_t now, ftime_t *ft_out) -{ - ft_out->earliest = now + ftime_skew - ftime_slop; - ft_out->latest = now + ftime_skew + ftime_slop; -} -#endif -/** Return true iff we think that now might be after when. */ -int -ftime_maybe_after(time_t now, time_t when) -{ - /* It may be after when iff the latest possible current time is after when */ - return (now + ftime_skew + ftime_slop) >= when; -} -/** Return true iff we think that now might be before when. */ -int -ftime_maybe_before(time_t now, time_t when) -{ - /* It may be before when iff the earliest possible current time is before */ - return (now + ftime_skew - ftime_slop) < when; -} -/** Return true if we think that now is definitely after when. */ -int -ftime_definitely_after(time_t now, time_t when) -{ - /* It is definitely after when if the earliest time it could be is still - * after when. */ - return (now + ftime_skew - ftime_slop) >= when; -} -/** Return true if we think that now is definitely before when. - */ -int -ftime_definitely_before(time_t now, time_t when) -{ - /* It is definitely before when if the latest time it could be is still - * before when. */ - return (now + ftime_skew + ftime_slop) < when; -} - -/* ===== * Rate limiting * ===== */ diff --git a/src/common/util.h b/src/common/util.h index 3736237..6b54856 100644 --- a/src/common/util.h +++ b/src/common/util.h @@ -247,16 +247,6 @@ time_t approx_time(void); void update_approx_time(time_t now); #endif -/* Fuzzy time. */ -void ftime_set_maximum_sloppiness(int seconds); -void ftime_set_estimated_skew(int seconds); -/* typedef struct ftime_t { time_t earliest; time_t latest; } ftime_t; */ -/* void ftime_get_window(time_t now, ftime_t *ft_out); */ -int ftime_maybe_after(time_t now, time_t when); -int ftime_maybe_before(time_t now, time_t when); -int ftime_definitely_after(time_t now, time_t when); -int ftime_definitely_before(time_t now, time_t when); - /* Rate-limiter */ /** A ratelim_t remembers how often an event is occurring, and how often diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c index 687ac03..155dffe 100644 --- a/src/or/networkstatus.c +++ b/src/or/networkstatus.c @@ -1764,7 +1764,11 @@ networkstatus_set_current_consensus(const char *consensus, write_str_to_file(consensus_fname, consensus, 0); } - if (ftime_definitely_before(now, current_consensus->valid_after)) { +/** If a consensus appears more than this many seconds before its declared + * valid-after time, declare that our clock is skewed. */ +#define EARLY_CONSENSUS_NOTICE_SKEW 60 + + if (now < current_consensus->valid_after - EARLY_CONSENSUS_NOTICE_SKEW) { char tbuf[ISO_TIME_LEN+1]; char dbuf[64]; long delta = now - current_consensus->valid_after; diff --git a/src/or/routerlist.c b/src/or/routerlist.c index 4421d5c..2dca578 100644 --- a/src/or/routerlist.c +++ b/src/or/routerlist.c @@ -328,7 +328,7 @@ trusted_dirs_remove_old_certs(void) time_t cert_published; if (newest == cert) continue; - expired = ftime_definitely_after(now, cert->expires); + expired = now > cert->expires; cert_published = cert->cache_info.published_on; /* Store expired certs for 48 hours after a newer arrives; */ @@ -520,7 +520,7 @@ authority_certs_fetch_missing(networkstatus_t *status, time_t now) continue; cl = get_cert_list(ds->v3_identity_digest); SMARTLIST_FOREACH(cl->certs, authority_cert_t *, cert, { - if (!ftime_definitely_after(now, cert->expires)) { + if (now < cert->expires) { /* It's not expired, and we weren't looking for something to * verify a consensus with. Call it done. */ download_status_reset(&cl->dl_status);

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[tor/maint-0.2.2] Merge remote-tracking branch 'public/xxx_fixups' into maint-0.2.2
by nickm＠torproject.org 07 Apr '11

07 Apr '11

commit ba0cd8094f8e6ae0113ad69958d9d0973bb1f2c3 Merge: 118d8ff fc64783 Author: Nick Mathewson <nickm(a)torproject.org> Date: Thu Apr 7 12:03:04 2011 -0400 Merge remote-tracking branch 'public/xxx_fixups' into maint-0.2.2 Conflicts: src/or/or.h changes/bug539_removal | 6 +++ changes/connect_err_reporting | 6 +++ changes/count_overflow | 5 +++ changes/full_ap_circuits | 6 +++ changes/kill_ftime | 7 ++++ changes/noroute | 5 +++ src/common/address.c | 20 ++++++----- src/common/compat_libevent.c | 17 +++------ src/common/memarea.c | 7 +++- src/common/util.c | 77 ----------------------------------------- src/common/util.h | 10 ----- src/or/buffers.c | 6 ++-- src/or/circuitbuild.c | 9 +++-- src/or/circuitlist.c | 3 ++ src/or/circuituse.c | 5 ++- src/or/config.c | 6 ++-- src/or/connection.c | 36 ++++++++++++------- src/or/connection_edge.c | 30 +++++++++++----- src/or/connection_or.c | 6 +++- src/or/directory.c | 37 ++++++++------------ src/or/dirserv.c | 11 ++++-- src/or/dns.c | 2 +- src/or/dnsserv.c | 2 +- src/or/eventdns.c | 2 +- src/or/geoip.c | 5 ++- src/or/networkstatus.c | 11 ++++-- src/or/or.h | 12 +++++-- src/or/reasons.c | 8 +---- src/or/relay.c | 2 + src/or/rendclient.c | 4 +- src/or/rendcommon.c | 2 +- src/or/rephist.c | 2 +- src/or/routerlist.c | 18 +++++----- src/or/routerparse.c | 2 +- 34 files changed, 184 insertions(+), 203 deletions(-) diff --cc src/or/or.h index 3cadd31,e44c626..1688a08 --- a/src/or/or.h +++ b/src/or/or.h @@@ -2126,9 -2126,16 +2126,15 @@@ typedef struct circuit_t * length ONIONSKIN_CHALLENGE_LEN. */ char *n_conn_onionskin; - time_t timestamp_created; /**< When was this circuit created? */ + struct timeval timestamp_created; /**< When was the circuit created? */ - time_t timestamp_dirty; /**< When the circuit was first used, or 0 if the - * circuit is clean. */ + /** When the circuit was first used, or 0 if the circuit is clean. + * + * XXXX023 Note that some code will artifically adjust this value backward + * in time in order to indicate that a circuit shouldn't be used for new + * streams, but that it can stay alive as long as it has streams on it. + * That's a kludge we should fix. + */ + time_t timestamp_dirty; - struct timeval highres_created; /**< When exactly was the circuit created? */ uint16_t marked_for_close; /**< Should we close this circuit at the end of * the main loop? (If true, holds the line number

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[tor/maint-0.2.2] Send END_STREAM_REASON_NOROUTE: clients that didn't grok it are now obsolete
by nickm＠torproject.org 07 Apr '11

07 Apr '11

commit fc647832783cab352bebba63fe0210d7be395058 Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Mar 28 13:42:59 2011 -0400 Send END_STREAM_REASON_NOROUTE: clients that didn't grok it are now obsolete --- changes/noroute | 5 +++++ src/or/reasons.c | 8 +------- 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/changes/noroute b/changes/noroute new file mode 100644 index 0000000..644deec --- /dev/null +++ b/changes/noroute @@ -0,0 +1,5 @@ + - Minor features + - Send END_STREAM_REASON_NOROUTE in response to EHOSTUNREACH errors. + Clients before 0.2.1.27 didn't handle NOROUTE correctly, but + such clients are already deprecated because of security bugs. + diff --git a/src/or/reasons.c b/src/or/reasons.c index 27c947e..319e6c0 100644 --- a/src/or/reasons.c +++ b/src/or/reasons.c @@ -174,13 +174,7 @@ errno_to_stream_end_reason(int e) S_CASE(ENETUNREACH): return END_STREAM_REASON_INTERNAL; S_CASE(EHOSTUNREACH): - /* XXXX023 - * The correct behavior is END_STREAM_REASON_NOROUTE, but older - * clients don't recognize it. So we're going to continue sending - * "MISC" until 0.2.1.27 or later is "well established". - */ - /* return END_STREAM_REASON_NOROUTE; */ - return END_STREAM_REASON_MISC; + return END_STREAM_REASON_NOROUTE; S_CASE(ECONNREFUSED): return END_STREAM_REASON_CONNECTREFUSED; S_CASE(ECONNRESET):

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[tor/maint-0.2.2] Add a missing cast to silence the compiler
by nickm＠torproject.org 07 Apr '11

07 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/maint-0.2.2] Improve a few comments
by nickm＠torproject.org 07 Apr '11

07 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/maint-0.2.2] Add XXX023s for our timestamp_dirty abuse.
by nickm＠torproject.org 07 Apr '11

07 Apr '11

commit f3b89c114112987b74bb0632cfe47a3a17859adb Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 17:49:44 2011 -0400 Add XXX023s for our timestamp_dirty abuse. --- src/or/circuitlist.c | 3 +++ src/or/connection_edge.c | 2 ++ src/or/or.h | 10 ++++++++-- src/or/relay.c | 2 ++ 4 files changed, 15 insertions(+), 2 deletions(-) diff --git a/src/or/circuitlist.c b/src/or/circuitlist.c index b4f5f45..521c21e 100644 --- a/src/or/circuitlist.c +++ b/src/or/circuitlist.c @@ -1023,6 +1023,7 @@ circuit_mark_all_unused_circs(void) * This is useful for letting the user change pseudonyms, so new * streams will not be linkable to old streams. */ +/* XXX023 this is a bad name for what this function does */ void circuit_expire_all_dirty_circs(void) { @@ -1033,6 +1034,8 @@ circuit_expire_all_dirty_circs(void) if (CIRCUIT_IS_ORIGIN(circ) && !circ->marked_for_close && circ->timestamp_dirty) + /* XXXX023 This is a screwed-up way to say "This is too dirty + * for new circuits. */ circ->timestamp_dirty -= options->MaxCircuitDirtiness; } } diff --git a/src/or/connection_edge.c b/src/or/connection_edge.c index c75c06b..af0cfbe 100644 --- a/src/or/connection_edge.c +++ b/src/or/connection_edge.c @@ -517,6 +517,7 @@ connection_ap_expire_beginning(void) /* kludge to make us not try this circuit again, yet to allow * current streams on it to survive if they can: make it * unattractive to use for new streams */ + /* XXXX023 this is a kludgy way to do this. */ tor_assert(circ->timestamp_dirty); circ->timestamp_dirty -= options->MaxCircuitDirtiness; /* give our stream another 'cutoff' seconds to try */ @@ -2164,6 +2165,7 @@ 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) { 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); return -1; } diff --git a/src/or/or.h b/src/or/or.h index 124892c..e44c626 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -2127,8 +2127,14 @@ typedef struct circuit_t { char *n_conn_onionskin; time_t timestamp_created; /**< When was this circuit created? */ - time_t timestamp_dirty; /**< When the circuit was first used, or 0 if the - * circuit is clean. */ + /** When the circuit was first used, or 0 if the circuit is clean. + * + * XXXX023 Note that some code will artifically adjust this value backward + * in time in order to indicate that a circuit shouldn't be used for new + * streams, but that it can stay alive as long as it has streams on it. + * That's a kludge we should fix. + */ + time_t timestamp_dirty; struct timeval highres_created; /**< When exactly was the circuit created? */ uint16_t marked_for_close; /**< Should we close this circuit at the end of diff --git a/src/or/relay.c b/src/or/relay.c index 076b46b..807cb3d 100644 --- a/src/or/relay.c +++ b/src/or/relay.c @@ -791,6 +791,8 @@ connection_ap_process_end_not_open( < MAX_RESOLVE_FAILURES) { /* We haven't retried too many times; reattach the connection. */ circuit_log_path(LOG_INFO,LD_APP,circ); + /* 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;

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[tor/maint-0.2.2] Clarify some documentation and comments wrt resetting OR token buckets
by nickm＠torproject.org 07 Apr '11

07 Apr '11

commit d38030381b04263f76ce7f8ed2d6ceefc4ce363f Author: Nick Mathewson <nickm(a)torproject.org> Date: Fri Mar 25 17:21:16 2011 -0400 Clarify some documentation and comments wrt resetting OR token buckets --- src/or/connection_or.c | 6 +++++- src/or/networkstatus.c | 3 ++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/src/or/connection_or.c b/src/or/connection_or.c index ff863fd..4b932ec 100644 --- a/src/or/connection_or.c +++ b/src/or/connection_or.c @@ -353,6 +353,9 @@ connection_or_digest_is_known_relay(const char *id_digest) * per-conn limits that are big enough they'll never matter. But if it's * not a known relay, first check if we set PerConnBwRate/Burst, then * check if the consensus sets them, else default to 'big enough'. + * + * If reset is true, set the bucket to be full. Otherwise, just + * clip the bucket if it happens to be too full. */ static void connection_or_update_token_buckets_helper(or_connection_t *conn, int reset, @@ -392,7 +395,8 @@ connection_or_update_token_buckets_helper(or_connection_t *conn, int reset, } /** Either our set of relays or our per-conn rate limits have changed. - * Go through all the OR connections and update their token buckets. */ + * Go through all the OR connections and update their token buckets to make + * sure they don't exceed their maximum values. */ void connection_or_update_token_buckets(smartlist_t *conns, or_options_t *options) { diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c index 18cb477..4f6fe15 100644 --- a/src/or/networkstatus.c +++ b/src/or/networkstatus.c @@ -1747,7 +1747,8 @@ networkstatus_set_current_consensus(const char *consensus, routerstatus_list_update_named_server_map(); cell_ewma_set_scale_factor(options, current_consensus); - /* XXX022 where is the right place to put this call? */ + /* XXXX023 this call might be unnecessary here: can changing the + * current consensus really alter our view of any OR's rate limits? */ connection_or_update_token_buckets(get_connection_array(), options); circuit_build_times_new_consensus_params(&circ_times, current_consensus);

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[tor/maint-0.2.2] Fix handling of StreamID exhaustion.
by nickm＠torproject.org 07 Apr '11

07 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/maint-0.2.2] Remove workaround code for bug539
by nickm＠torproject.org 07 Apr '11

07 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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