tor-commits May 2021

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1972 discussions

[tor/main] tor-resolve: Added notice for .exit domains
by dgoulet＠torproject.org 27 May '21

27 May '21

commit 6028b2c10ca943a9b675feff10cae140a3d146d6 Author: Panagiotis Vasilopoulos <hello(a)alwayslivid.com> Date: Sun Apr 11 20:21:31 2021 +0300 tor-resolve: Added notice for .exit domains Signed-off-by: Panagiotis Vasilopoulos <hello(a)alwayslivid.com> --- src/tools/tor-resolve.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-) diff --git a/src/tools/tor-resolve.c b/src/tools/tor-resolve.c index 09ff8df4ab..ad52fdaa22 100644 --- a/src/tools/tor-resolve.c +++ b/src/tools/tor-resolve.c @@ -253,7 +253,7 @@ build_socks_resolve_request(uint8_t **out, } static void -onion_warning(const char *hostname) +onion_hs_warning(const char *hostname) { log_warn(LD_NET, "%s is a hidden service; those don't have IP addresses. " @@ -264,6 +264,15 @@ onion_warning(const char *hostname) hostname); } +static void +onion_exit_warning(const char *hostname) +{ + log_warn(LD_NET, + "%s is a link pointing to an exit node; however, .exit domains" + "have been long defunct and are not valid anymore.", + hostname); +} + /** Given a len-byte SOCKS4a response in response, set * *addr_out to the address it contains (in host order). * Return 0 on success, -1 on error. @@ -306,9 +315,15 @@ parse_socks4a_resolve_response(const char *hostname, if (status != 90) { log_warn(LD_NET,"Got status response '%d': socks request failed.", status); if (!strcasecmpend(hostname, ".onion")) { - onion_warning(hostname); + onion_hs_warning(hostname); result = -1; goto cleanup; } + + if (!strcasecmpend(hostname, ".exit")) { + onion_exit_warning(hostname); + result = -1; goto cleanup; + } + result = -1; goto cleanup; } @@ -493,7 +508,11 @@ do_resolve(const char *hostname, (unsigned)reply_field, socks5_reason_to_string(reply_field)); if (reply_field == 4 && !strcasecmpend(hostname, ".onion")) { - onion_warning(hostname); + onion_hs_warning(hostname); + } + + if (reply_field == 4 && !strcasecmpend(hostname, ".exit")) { + onion_exit_warning(hostname); } socks5_server_reply_free(reply);

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[tor/main] Merge branch 'tor-gitlab/mr/359'
by dgoulet＠torproject.org 27 May '21

27 May '21

commit 111e6e7f269c08e193efba8d45682bac93ead81e Merge: c29ba98ce8 6028b2c10c Author: David Goulet <dgoulet(a)torproject.org> Date: Thu May 27 10:12:16 2021 -0400 Merge branch 'tor-gitlab/mr/359' src/tools/tor-resolve.c | 25 ++++++++++++++++++++++--- 1 file changed, 22 insertions(+), 3 deletions(-)

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[tor/main] Merge branch 'tor-gitlab/mr/392' into maint-0.4.6
by dgoulet＠torproject.org 27 May '21

27 May '21

commit fd3678fa60b3ba66fa414f86ce962f380ca6462e Merge: bab2b29f89 d12b16614d Author: David Goulet <dgoulet(a)torproject.org> Date: Thu May 27 10:01:44 2021 -0400 Merge branch 'tor-gitlab/mr/392' into maint-0.4.6 changes/bug40375 | 5 +++++ src/feature/control/control_getinfo.c | 32 +++++++++++++++----------------- src/feature/dirclient/dirclient.c | 21 +++++++++++++-------- 3 files changed, 33 insertions(+), 25 deletions(-)

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[tor/main] Merge branch 'maint-0.4.6'
by dgoulet＠torproject.org 27 May '21

27 May '21

commit c29ba98ce861a2185a818415e035a9a0803f2ab6 Merge: 1665d11942 fd3678fa60 Author: David Goulet <dgoulet(a)torproject.org> Date: Thu May 27 10:01:49 2021 -0400 Merge branch 'maint-0.4.6' changes/bug40375 | 5 +++++ src/feature/control/control_getinfo.c | 32 +++++++++++++++----------------- src/feature/dirclient/dirclient.c | 21 +++++++++++++-------- 3 files changed, 33 insertions(+), 25 deletions(-)

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[tor/main] Prefer mmap()ed consensus files over cached_dir_t entries.
by dgoulet＠torproject.org 27 May '21

27 May '21

commit d12b16614d09b303f9ef9624107b589264537341 Author: Nick Mathewson <nickm(a)torproject.org> Date: Wed May 26 13:02:56 2021 -0400 Prefer mmap()ed consensus files over cached_dir_t entries. Cached_dir_t is a somewhat "legacy" kind of storage when used for consensus documents, and it appears that there are cases when changing our settings causes us to stop updating those entries. This can cause trouble, as @arma found out in #40375, where he changed his settings around, and consensus diff application got messed up: consensus diffs were being _requested_ based on the latest consensus, but were being (incorrectly) applied to a consensus that was no longer the latest one. This patch is a minimal fix for backporting purposes: it has Tor do the same search when applying consensus diffs as we use to request them. This should be sufficient for correct behavior. There's a similar case in GETINFO handling; I've fixed that too. Fixes #40375; bugfix on 0.3.1.1-alpha. --- changes/bug40375 | 5 +++++ src/feature/control/control_getinfo.c | 32 +++++++++++++++----------------- src/feature/dirclient/dirclient.c | 21 +++++++++++++-------- 3 files changed, 33 insertions(+), 25 deletions(-) diff --git a/changes/bug40375 b/changes/bug40375 new file mode 100644 index 0000000000..7ac32bc628 --- /dev/null +++ b/changes/bug40375 @@ -0,0 +1,5 @@ + o Minor bugfixes (consensus handling): + - Avoid a set of bugs that could be caused by inconsistently preferring + an out-of-date consensus stored in a stale directory cache over + a more recent one stored on disk as the latest consensus. + Fixes bug 40375; bugfix on 0.3.1.1-alpha. diff --git a/src/feature/control/control_getinfo.c b/src/feature/control/control_getinfo.c index 5feadd23d1..899f188546 100644 --- a/src/feature/control/control_getinfo.c +++ b/src/feature/control/control_getinfo.c @@ -353,26 +353,24 @@ getinfo_helper_current_consensus(consensus_flavor_t flavor, *errmsg = "Internal error: unrecognized flavor name."; return -1; } - if (we_want_to_fetch_flavor(get_options(), flavor)) { - /** Check from the cache */ - const cached_dir_t *consensus = dirserv_get_consensus(flavor_name); - if (consensus) { - *answer = tor_strdup(consensus->dir); - } + tor_mmap_t *mapped = networkstatus_map_cached_consensus(flavor_name); + if (mapped) { + *answer = tor_memdup_nulterm(mapped->data, mapped->size); + tor_munmap_file(mapped); } - if (!*answer) { /* try loading it from disk */ - - tor_mmap_t *mapped = networkstatus_map_cached_consensus(flavor_name); - if (mapped) { - *answer = tor_memdup_nulterm(mapped->data, mapped->size); - tor_munmap_file(mapped); - } - if (!*answer) { /* generate an error */ - *errmsg = "Could not open cached consensus. " - "Make sure FetchUselessDescriptors is set to 1."; - return -1; + if (!*answer) { /* Maybe it's in the cache? */ + if (we_want_to_fetch_flavor(get_options(), flavor)) { + const cached_dir_t *consensus = dirserv_get_consensus(flavor_name); + if (consensus) { + *answer = tor_strdup(consensus->dir); + } } } + if (!*answer) { /* generate an error */ + *errmsg = "Could not open cached consensus. " + "Make sure FetchUselessDescriptors is set to 1."; + return -1; + } return 0; } diff --git a/src/feature/dirclient/dirclient.c b/src/feature/dirclient/dirclient.c index a5dd856729..b3159966d2 100644 --- a/src/feature/dirclient/dirclient.c +++ b/src/feature/dirclient/dirclient.c @@ -2263,18 +2263,23 @@ handle_response_fetch_consensus(dir_connection_t *conn, if (looks_like_a_consensus_diff(body, body_len)) { /* First find our previous consensus. Maybe it's in ram, maybe not. */ - cached_dir_t *cd = dirserv_get_consensus(flavname); + cached_dir_t *cd = NULL; const char *consensus_body = NULL; size_t consensus_body_len; tor_mmap_t *mapped_consensus = NULL; - if (cd) { - consensus_body = cd->dir; - consensus_body_len = cd->dir_len; + + /* We prefer the mmap'd version over the cached_dir_t version, + * since that matches the logic we used when we picked a consensus + * back in dir_consensus_request_set_additional_headers. */ + mapped_consensus = networkstatus_map_cached_consensus(flavname); + if (mapped_consensus) { + consensus_body = mapped_consensus->data; + consensus_body_len = mapped_consensus->size; } else { - mapped_consensus = networkstatus_map_cached_consensus(flavname); - if (mapped_consensus) { - consensus_body = mapped_consensus->data; - consensus_body_len = mapped_consensus->size; + cd = dirserv_get_consensus(flavname); + if (cd) { + consensus_body = cd->dir; + consensus_body_len = cd->dir_len; } } if (!consensus_body) {

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[tor/maint-0.4.6] Prefer mmap()ed consensus files over cached_dir_t entries.
by dgoulet＠torproject.org 27 May '21

27 May '21

1 0

[tor/maint-0.4.6] Merge branch 'tor-gitlab/mr/392' into maint-0.4.6
by dgoulet＠torproject.org 27 May '21

27 May '21

1 0

[tor/release-0.4.6] Merge branch 'tor-gitlab/mr/392' into maint-0.4.6
by dgoulet＠torproject.org 27 May '21

27 May '21

1 0

[tor/release-0.4.6] Prefer mmap()ed consensus files over cached_dir_t entries.
by dgoulet＠torproject.org 27 May '21

27 May '21

1 0

[tor/release-0.4.6] Merge branch 'maint-0.4.6' into release-0.4.6
by dgoulet＠torproject.org 27 May '21

27 May '21

commit e778f7065fd65c51f1ad4bb46c596c2b9d2cf1e4 Merge: 8efb9c29e9 fd3678fa60 Author: David Goulet <dgoulet(a)torproject.org> Date: Thu May 27 10:01:49 2021 -0400 Merge branch 'maint-0.4.6' into release-0.4.6 changes/bug40375 | 5 +++++ src/feature/control/control_getinfo.c | 32 +++++++++++++++----------------- src/feature/dirclient/dirclient.c | 21 +++++++++++++-------- 3 files changed, 33 insertions(+), 25 deletions(-)

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tor-commits May 2021