tor-commits September 2012

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792 discussions

[tor/maint-0.2.3] Merge remote-tracking branch 'arma/bug6743' into maint-0.2.3
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit acfd487e7dbf5fa1408a2bba7afff54bc7d0118e Merge: 4bd90e2 eb3d079 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Sep 4 18:33:56 2012 -0400 Merge remote-tracking branch 'arma/bug6743' into maint-0.2.3 changes/bug6743 | 9 +++++++++ src/or/circuituse.c | 2 +- 2 files changed, 10 insertions(+), 1 deletions(-)

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[tor/master] Clients connect to public relays over IPv6.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit e04e1a2e7d67861881c9e237dcea344dda39e858 Author: Linus Nordberg <linus(a)torproject.org> Date: Mon Aug 27 15:03:34 2012 +0200 Clients connect to public relays over IPv6. Add ClientUseIPv6 and ClientPreferIPv6ORPort configuration options. Use "preferred OR port" for all entry nodes, not only for bridges. Mark bridges with "prefer IPv6 OR port" if an IPv6 address is configured in Bridge line and ClientPreferIPv6ORPort is set. Mark relays with "prefer IPv6 OR port" if an IPv6 address is found in descriptor and ClientPreferIPv6ORPort is set. Filter "preferred OR port" through the ClientUseIPv6 config option. We might want to move this test to where actual connection is being set up once we have a fall back mechanism in place. Have only non-servers pick an IPv6 address for the first hop: We don't want relays to connect over IPv6 yet. (IPv6 has never been used for second or third hops.) Implements ticket 5535. --- changes/bug5535 | 5 +++++ doc/tor.1.txt | 12 ++++++++++++ src/or/circuitbuild.c | 32 ++++++++++++++++++-------------- src/or/config.c | 2 ++ src/or/nodelist.c | 10 +++++++++- src/or/nodelist.h | 8 ++++---- src/or/or.h | 7 +++++++ 7 files changed, 57 insertions(+), 19 deletions(-) diff --git a/changes/bug5535 b/changes/bug5535 new file mode 100644 index 0000000..b5fa0d7 --- /dev/null +++ b/changes/bug5535 @@ -0,0 +1,5 @@ + o Major features: + - If configured with ClientUseIPv6, clients may connect to entry + nodes over IPv6. Another new config option, ClientPreferIPv6ORPort, + can be set to make this even more likely to happen. + Implements ticket 5535. diff --git a/doc/tor.1.txt b/doc/tor.1.txt index aa9303c..68898eb 100644 --- a/doc/tor.1.txt +++ b/doc/tor.1.txt @@ -1171,6 +1171,18 @@ The following options are useful only for clients (that is, if If no defaults are available there, these options default to 20, .70, 0.0, 200, and 4 respectively. +**ClientUseIPv6** **0**|**1**:: + If this option is set to 1, Tor might connect to entry nodes over + IPv6. Note that clients configured with an IPv6 address in a + **Bridge** option will try connecting over IPv6 if even if + **ClientUseIPv6** is set to 0. (Default: 0) + +**ClientPreferIPv6ORPort** **0**|**1**:: + If this option is set to 1, Tor prefers an OR port with an IPv6 + address over one with IPv4 if a given entry node has both. Other + things may influence the choice. This option breaks a tie to the + favor of IPv6. (Default: 0) + SERVER OPTIONS -------------- diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c index ba617ff..3419768 100644 --- a/src/or/circuitbuild.c +++ b/src/or/circuitbuild.c @@ -3792,12 +3792,10 @@ onion_extend_cpath(origin_circuit_t *circ) } else if (cur_len == 0) { /* picking first node */ const node_t *r = choose_good_entry_server(purpose, state); if (r) { - /* If we're extending to a bridge, use the preferred address - rather than the primary, for potentially extending to an IPv6 - bridge. */ - int use_pref_addr = (r->ri != NULL && - r->ri->purpose == ROUTER_PURPOSE_BRIDGE); - info = extend_info_from_node(r, use_pref_addr); + /* If we're a client, use the preferred address rather than the + primary address, for potentially connecting to an IPv6 OR + port. */ + info = extend_info_from_node(r, server_mode(get_options()) == 0); tor_assert(info); } } else { @@ -3865,10 +3863,11 @@ extend_info_alloc(const char *nickname, const char *digest, /** Allocate and return a new extend_info that can be used to build a * circuit to or through the node node. Use the primary address - * of the node unless for_direct_connect is true, in which case - * the preferred address is used instead. May return NULL if there is - * not enough info about node to extend to it--for example, if - * there is no routerinfo_t or microdesc_t. + * of the node (i.e. its IPv4 address) unless + * for_direct_connect is true, in which case the preferred + * address is used instead. May return NULL if there is not enough + * info about node to extend to it--for example, if there is no + * routerinfo_t or microdesc_t. **/ extend_info_t * extend_info_from_node(const node_t *node, int for_direct_connect) @@ -5607,10 +5606,15 @@ rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node) } } - /* Indicate that we prefer connecting to this bridge over the - protocol that the bridge address indicates. Last bridge - descriptor handled wins. */ - node->ipv6_preferred = tor_addr_family(&bridge->addr) == AF_INET6; + /* Mark bridge as preferably connected to over IPv6 if its IPv6 + address is in a Bridge line and ClientPreferIPv6ORPort is + set. Unless both is true, a potential IPv6 OR port of this + bridge won't get selected. + + XXX ipv6_preferred is never reset (#6757) */ + if (get_options()->ClientPreferIPv6ORPort == 1 && + tor_addr_family(&bridge->addr) == AF_INET6) + node->ipv6_preferred = 1; /* XXXipv6 we lack support for falling back to another address for the same relay, warn the user */ diff --git a/src/or/config.c b/src/or/config.c index a5a8fec..f21016d 100644 --- a/src/or/config.c +++ b/src/or/config.c @@ -225,8 +225,10 @@ static config_var_t _option_vars[] = { V(CircuitPriorityHalflife, DOUBLE, "-100.0"), /*negative:'Use default'*/ V(ClientDNSRejectInternalAddresses, BOOL,"1"), V(ClientOnly, BOOL, "0"), + V(ClientPreferIPv6ORPort, BOOL, "0"), V(ClientRejectInternalAddresses, BOOL, "1"), V(ClientTransportPlugin, LINELIST, NULL), + V(ClientUseIPv6, BOOL, "0"), V(ConsensusParams, STRING, NULL), V(ConnLimit, UINT, "1000"), V(ConnDirectionStatistics, BOOL, "0"), diff --git a/src/or/nodelist.c b/src/or/nodelist.c index 9d0247f..1d1bbfc 100644 --- a/src/or/nodelist.c +++ b/src/or/nodelist.c @@ -242,6 +242,8 @@ nodelist_set_consensus(networkstatus_t *ns) node->is_bad_directory = rs->is_bad_directory; node->is_bad_exit = rs->is_bad_exit; node->is_hs_dir = rs->is_hs_dir; + if (options->ClientPreferIPv6ORPort == 1) + node->ipv6_preferred = !tor_addr_is_null(&rs->ipv6_addr); } } SMARTLIST_FOREACH_END(rs); @@ -849,7 +851,13 @@ node_get_pref_orport(const node_t *node, tor_addr_port_t *ap_out) { tor_assert(ap_out); - if (node_ipv6_preferred(node)) + /* Cheap implementation of config option ClientUseIPv6 -- simply + don't prefer IPv6 when ClientUseIPv6 is not set. (See #4455 for + more on this subject.) Note that this filter is too strict since + we're hindering not only clients! Erring on the safe side + shouldn't be a problem though. XXX move this check to where + outgoing connections are made? -LN */ + if (get_options()->ClientUseIPv6 == 1 && node_ipv6_preferred(node)) node_get_pref_ipv6_orport(node, ap_out); else node_get_prim_orport(node, ap_out); diff --git a/src/or/nodelist.h b/src/or/nodelist.h index 5558827..18bf4ae 100644 --- a/src/or/nodelist.h +++ b/src/or/nodelist.h @@ -42,18 +42,18 @@ int node_get_purpose(const node_t *node); int node_is_me(const node_t *node); int node_exit_policy_rejects_all(const node_t *node); smartlist_t *node_get_all_orports(const node_t *node); -void node_get_prim_orport(const node_t *node, tor_addr_port_t *ap_out); -void node_get_pref_orport(const node_t *node, tor_addr_port_t *ap_out); -void node_get_pref_ipv6_orport(const node_t *node, tor_addr_port_t *ap_out); -uint32_t node_get_prim_addr_ipv4h(const node_t *node); int node_allows_single_hop_exits(const node_t *node); const char *node_get_nickname(const node_t *node); const char *node_get_platform(const node_t *node); +uint32_t node_get_prim_addr_ipv4h(const node_t *node); void node_get_address_string(const node_t *node, char *cp, size_t len); long node_get_declared_uptime(const node_t *node); time_t node_get_published_on(const node_t *node); const smartlist_t *node_get_declared_family(const node_t *node); int node_ipv6_preferred(const node_t *node); +void node_get_prim_orport(const node_t *node, tor_addr_port_t *ap_out); +void node_get_pref_orport(const node_t *node, tor_addr_port_t *ap_out); +void node_get_pref_ipv6_orport(const node_t *node, tor_addr_port_t *ap_out); smartlist_t *nodelist_get_list(void); diff --git a/src/or/or.h b/src/or/or.h index 00a359c..7536afc 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -3487,6 +3487,13 @@ typedef struct { * over randomly chosen exits. */ int ClientRejectInternalAddresses; + /** If true, clients may connect over IPv6. XXX we don't really + enforce this -- clients _may_ set up outgoing IPv6 connections + even when this option is not set. */ + int ClientUseIPv6; + /** If true, prefer an IPv6 OR port over an IPv4 one. */ + int ClientPreferIPv6ORPort; + /** The length of time that we think a consensus should be fresh. */ int V3AuthVotingInterval; /** The length of time we think it will take to distribute votes. */

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[tor/master] Add IPv6 OR port to microdesc_t and populate it.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit 7a8366a3eb7081c29cbc0ebf0e9757cbfd71a86d Author: Linus Nordberg <linus(a)torproject.org> Date: Fri Aug 31 23:02:19 2012 +0200 Add IPv6 OR port to microdesc_t and populate it. --- src/or/or.h | 4 ++++ src/or/routerparse.c | 9 +++++++++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/src/or/or.h b/src/or/or.h index 7536afc..4bf99e2 100644 --- a/src/or/or.h +++ b/src/or/or.h @@ -1960,6 +1960,10 @@ typedef struct microdesc_t { /** As routerinfo_t.onion_pkey */ crypto_pk_t *onion_pkey; + /** As routerinfo_t.ipv6_add */ + tor_addr_t ipv6_addr; + /** As routerinfo_t.ipv6_orport */ + uint16_t ipv6_orport; /** As routerinfo_t.family */ smartlist_t *family; /** Exit policy summary */ diff --git a/src/or/routerparse.c b/src/or/routerparse.c index 60a2eae..4eec19f 100644 --- a/src/or/routerparse.c +++ b/src/or/routerparse.c @@ -522,6 +522,7 @@ static token_rule_t networkstatus_detached_signature_token_table[] = { /** List of tokens recognized in microdescriptors */ static token_rule_t microdesc_token_table[] = { T1_START("onion-key", K_ONION_KEY, NO_ARGS, NEED_KEY_1024), + T0N("a", K_A, GE(1), NO_OBJ ), T01("family", K_FAMILY, ARGS, NO_OBJ ), T01("p", K_P, CONCAT_ARGS, NO_OBJ ), A01("@last-listed", A_LAST_LISTED, CONCAT_ARGS, NO_OBJ ), @@ -4421,6 +4422,14 @@ microdescs_parse_from_string(const char *s, const char *eos, md->onion_pkey = tok->key; tok->key = NULL; + { + smartlist_t *a_lines = find_all_by_keyword(tokens, K_A); + if (a_lines) { + find_single_ipv6_orport(a_lines, &md->ipv6_addr, &md->ipv6_orport); + smartlist_free(a_lines); + } + } + if ((tok = find_opt_by_keyword(tokens, K_FAMILY))) { int i; md->family = smartlist_new();

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[tor/master] Use preferred OR for nodes with routerstatus and microdesc too.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit 0f45dbefed1ddca4772bf66afb268bc20aefa1d1 Author: Linus Nordberg <linus(a)torproject.org> Date: Fri Aug 31 23:02:19 2012 +0200 Use preferred OR for nodes with routerstatus and microdesc too. extend_info_from_node() used to use the primary OR port (i.e. IPv4) unless the node had routerinfo. Now that we have IPv6 addresses in microdescs we may want to use them. Note that this patch changes using r->cache_info.identity_digest into using node->identity. I count on these being well synchronised, or things would break in other ways. Right? --- src/or/circuitbuild.c | 40 ++++++++++++++++++++++++---------------- 1 files changed, 24 insertions(+), 16 deletions(-) diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c index 3419768..2a449b0 100644 --- a/src/or/circuitbuild.c +++ b/src/or/circuitbuild.c @@ -3872,26 +3872,34 @@ extend_info_alloc(const char *nickname, const char *digest, extend_info_t * extend_info_from_node(const node_t *node, int for_direct_connect) { - if (node->ri) { - const routerinfo_t *r = node->ri; - tor_addr_port_t ap; - if (for_direct_connect) - node_get_pref_orport(node, &ap); - else - node_get_prim_orport(node, &ap); - return extend_info_alloc(r->nickname, r->cache_info.identity_digest, - r->onion_pkey, &ap.addr, ap.port); - } else if (node->rs && node->md) { - tor_addr_t addr; - tor_addr_from_ipv4h(&addr, node->rs->addr); + tor_addr_port_t ap; + + if (node->ri == NULL && (node->rs == NULL || node->md == NULL)) + return NULL; + + if (for_direct_connect) + node_get_pref_orport(node, &ap); + else + node_get_prim_orport(node, &ap); + + log_debug(LD_CIRC, "using %s:%d for %s", + fmt_and_decorate_addr(&ap.addr), ap.port, + node->ri ? node->ri->nickname : node->rs->nickname); + + if (node->ri) + return extend_info_alloc(node->ri->nickname, + node->identity, + node->ri->onion_pkey, + &ap.addr, + ap.port); + else if (node->rs && node->md) return extend_info_alloc(node->rs->nickname, node->identity, node->md->onion_pkey, - &addr, - node->rs->or_port); - } else { + &ap.addr, + ap.port); + else return NULL; - } } /** Release storage held by an extend_info_t struct. */

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[tor/master] Take microdesc IPv6 address into account when setting node->ipv6_preferred.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit 3746215350f4a25c5ec619a8fbe25f3637bb626f Author: Linus Nordberg <linus(a)torproject.org> Date: Fri Aug 31 23:02:19 2012 +0200 Take microdesc IPv6 address into account when setting node->ipv6_preferred. Also, do this only for clients, explicitly. Also, give the flag a value every time we set consensus. We used to touch it only when ClientPreferIPv6ORPort was set, which was wrong. --- src/or/nodelist.c | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/src/or/nodelist.c b/src/or/nodelist.c index 1d1bbfc..9ee114b 100644 --- a/src/or/nodelist.c +++ b/src/or/nodelist.c @@ -206,6 +206,7 @@ nodelist_set_consensus(networkstatus_t *ns) { const or_options_t *options = get_options(); int authdir = authdir_mode_v2(options) || authdir_mode_v3(options); + int client = !server_mode(options); init_nodelist(); if (ns->flavor == FLAV_MICRODESC) @@ -242,8 +243,11 @@ nodelist_set_consensus(networkstatus_t *ns) node->is_bad_directory = rs->is_bad_directory; node->is_bad_exit = rs->is_bad_exit; node->is_hs_dir = rs->is_hs_dir; - if (options->ClientPreferIPv6ORPort == 1) - node->ipv6_preferred = !tor_addr_is_null(&rs->ipv6_addr); + node->ipv6_preferred = 0; + if (client && options->ClientPreferIPv6ORPort == 1 && + (tor_addr_is_null(&rs->ipv6_addr) == 0 || + (node->md && tor_addr_is_null(&node->md->ipv6_addr) == 0))) + node->ipv6_preferred = 1; } } SMARTLIST_FOREACH_END(rs);

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[tor/master] Make node_ipv6_preferred() take microdescs into account.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit 8b081231b54f1bb33243078fab510a9a543242a0 Author: Linus Nordberg <linus(a)torproject.org> Date: Fri Aug 31 23:02:19 2012 +0200 Make node_ipv6_preferred() take microdescs into account. Also, make node_get_prim_orport() indicate in its return value whether a valid OR port was copied or not. Maybe we should make it legal to pass ap_out==NULL? --- src/or/nodelist.c | 31 ++++++++++++++++++++++--------- src/or/nodelist.h | 2 +- 2 files changed, 23 insertions(+), 10 deletions(-) diff --git a/src/or/nodelist.c b/src/or/nodelist.c index 9ee114b..25ed6a6 100644 --- a/src/or/nodelist.c +++ b/src/or/nodelist.c @@ -821,31 +821,44 @@ node_get_declared_family(const node_t *node) int node_ipv6_preferred(const node_t *node) { + tor_addr_port_t ipv4_addr; node_assert_ok(node); - if (node->ri) - return (!tor_addr_is_null(&node->ri->ipv6_addr) - && (node->ipv6_preferred || node->ri->addr == 0)); - if (node->rs) - return (!tor_addr_is_null(&node->rs->ipv6_addr) - && (node->ipv6_preferred || node->rs->addr == 0)); + + if (node->ipv6_preferred || node_get_prim_orport(node, &ipv4_addr)) { + if (node->ri) + return !tor_addr_is_null(&node->ri->ipv6_addr); + if (node->md) + return !tor_addr_is_null(&node->md->ipv6_addr); + if (node->rs) + return !tor_addr_is_null(&node->rs->ipv6_addr); + } return 0; } /** Copy the primary (IPv4) OR port (IP address and TCP port) for - * node into *ap_out. */ -void + * node into *ap_out. Return 0 if a valid address and + * port was copied, else return non-zero.*/ +int node_get_prim_orport(const node_t *node, tor_addr_port_t *ap_out) { node_assert_ok(node); tor_assert(ap_out); if (node->ri) { + if (node->ri->addr == 0 || node->ri->or_port == 0) + return -1; tor_addr_from_ipv4h(&ap_out->addr, node->ri->addr); ap_out->port = node->ri->or_port; - } else if (node->rs) { + return 0; + } + if (node->rs) { + if (node->rs->addr == 0 || node->rs->or_port == 0) + return -1; tor_addr_from_ipv4h(&ap_out->addr, node->rs->addr); ap_out->port = node->rs->or_port; + return 0; } + return -1; } /** Copy the preferred OR port (IP address and TCP port) for diff --git a/src/or/nodelist.h b/src/or/nodelist.h index 18bf4ae..fb65fa5 100644 --- a/src/or/nodelist.h +++ b/src/or/nodelist.h @@ -51,7 +51,7 @@ long node_get_declared_uptime(const node_t *node); time_t node_get_published_on(const node_t *node); const smartlist_t *node_get_declared_family(const node_t *node); int node_ipv6_preferred(const node_t *node); -void node_get_prim_orport(const node_t *node, tor_addr_port_t *ap_out); +int node_get_prim_orport(const node_t *node, tor_addr_port_t *ap_out); void node_get_pref_orport(const node_t *node, tor_addr_port_t *ap_out); void node_get_pref_ipv6_orport(const node_t *node, tor_addr_port_t *ap_out);

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[tor/master] Take microdesc into account when deciding about preferred OR port.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit d827a5495a9d05976f5610655f7e4b5b160a2dac Author: Linus Nordberg <linus(a)torproject.org> Date: Fri Aug 31 23:02:19 2012 +0200 Take microdesc into account when deciding about preferred OR port. --- src/or/nodelist.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/src/or/nodelist.c b/src/or/nodelist.c index 25ed6a6..e35039b 100644 --- a/src/or/nodelist.c +++ b/src/or/nodelist.c @@ -888,9 +888,17 @@ node_get_pref_ipv6_orport(const node_t *node, tor_addr_port_t *ap_out) node_assert_ok(node); tor_assert(ap_out); + /* We prefer the microdesc over a potential routerstatus here. They + are not being synchronised atm so there might be a chance that + they differ at some point, f.ex. when flipping + UseMicrodescriptors? -LN */ + if (node->ri) { tor_addr_copy(&ap_out->addr, &node->ri->ipv6_addr); ap_out->port = node->ri->ipv6_orport; + } else if (node->md) { + tor_addr_copy(&ap_out->addr, &node->md->ipv6_addr); + ap_out->port = node->md->ipv6_orport; } else if (node->rs) { tor_addr_copy(&ap_out->addr, &node->rs->ipv6_addr); ap_out->port = node->rs->ipv6_orport;

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[tor/master] Merge branch 'bug5535_only_rebased'
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit d7a646edcfbceaab412bc1558ec83a3551c2c8a4 Merge: ec94d03 d827a54 Author: Nick Mathewson <nickm(a)torproject.org> Date: Tue Sep 4 18:24:20 2012 -0400 Merge branch 'bug5535_only_rebased' changes/bug5535 | 5 +++ doc/tor.1.txt | 12 ++++++++ src/or/circuitbuild.c | 72 ++++++++++++++++++++++++++++-------------------- src/or/config.c | 2 + src/or/nodelist.c | 53 +++++++++++++++++++++++++++++------- src/or/nodelist.h | 8 +++--- src/or/or.h | 11 +++++++ src/or/routerparse.c | 9 ++++++ 8 files changed, 128 insertions(+), 44 deletions(-)

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[tor/master] Have directory authorities vote on IPv6 OR ports according to the spec
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit 156ffef2494136d2fa0b1456a1c21cc29cbc3ff0 Author: Linus Nordberg <linus(a)torproject.org> Date: Tue Aug 14 14:03:58 2012 +0200 Have directory authorities vote on IPv6 OR ports according to the spec Define new new consensus method 14 adding "a" lines to vote and consensus documents. From proposal 186: As with other data in the vote derived from the descriptor, the consensus will include whichever set of "a" lines are given by the most authorities who voted for the descriptor digest that will be used for the router. This patch implements this. --- changes/bug6363 | 3 ++ src/or/dirserv.c | 14 +++++++---- src/or/dirvote.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++-- src/or/routerparse.c | 63 ++++++++++++++++++++++++++++++++++++----------- src/test/test_dir.c | 8 ++++++ 5 files changed, 131 insertions(+), 23 deletions(-) diff --git a/changes/bug6363 b/changes/bug6363 new file mode 100644 index 0000000..de99b72 --- /dev/null +++ b/changes/bug6363 @@ -0,0 +1,3 @@ + o Major features: + - Directory authorities vote on IPv6 OR ports using new consensus + method 14. Implements ticket 6363. diff --git a/src/or/dirserv.c b/src/or/dirserv.c index f4ba02b..5814171 100644 --- a/src/or/dirserv.c +++ b/src/or/dirserv.c @@ -2053,7 +2053,7 @@ version_from_platform(const char *platform) * non-NULL, add a "v" line for the platform. Return 0 on success, -1 on * failure. * - * The format argument has three possible values: + * The format argument has one of the following values: * NS_V2 - Output an entry suitable for a V2 NS opinion document * NS_V3_CONSENSUS - Output the first portion of a V3 NS consensus entry * NS_V3_CONSENSUS_MICRODESC - Output the first portion of a V3 microdesc @@ -2092,17 +2092,18 @@ routerstatus_format_entry(char *buf, size_t buf_len, log_warn(LD_BUG, "Not enough space in buffer."); return -1; } + cp = buf + strlen(buf); /* TODO: Maybe we want to pass in what we need to build the rest of * this here, instead of in the caller. Then we could use the * networkstatus_type_t values, with an additional control port value * added -MP */ - if (format == NS_V3_CONSENSUS || format == NS_V3_CONSENSUS_MICRODESC) - return 0; - cp = buf + strlen(buf); + /* V3 microdesc consensuses don't have "a" lines. */ + if (format == NS_V3_CONSENSUS_MICRODESC) + return 0; - /* Possible "a" line, not included in consensus for now. */ + /* Possible "a" line. At most one for now. */ if (!tor_addr_is_null(&rs->ipv6_addr)) { const char *addr_str = fmt_and_decorate_addr(&rs->ipv6_addr); r = tor_snprintf(cp, buf_len - (cp-buf), @@ -2116,6 +2117,9 @@ routerstatus_format_entry(char *buf, size_t buf_len, cp += strlen(cp); } + if (format == NS_V3_CONSENSUS) + return 0; + /* NOTE: Whenever this list expands, be sure to increase MAX_FLAG_LINE_LEN*/ r = tor_snprintf(cp, buf_len - (cp-buf), "s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", diff --git a/src/or/dirvote.c b/src/or/dirvote.c index b3de90b..9056cf5 100644 --- a/src/or/dirvote.c +++ b/src/or/dirvote.c @@ -54,7 +54,7 @@ static int dirvote_publish_consensus(void); static char *make_consensus_method_list(int low, int high, const char *sep); /** The highest consensus method that we currently support. */ -#define MAX_SUPPORTED_CONSENSUS_METHOD 13 +#define MAX_SUPPORTED_CONSENSUS_METHOD 14 /** Lowest consensus method that contains a 'directory-footer' marker */ #define MIN_METHOD_FOR_FOOTER 9 @@ -76,6 +76,9 @@ static char *make_consensus_method_list(int low, int high, const char *sep); * with no microdesc. */ #define MIN_METHOD_FOR_MANDATORY_MICRODESC 13 +/** Lowest consensus method that contains "a" lines. */ +#define MIN_METHOD_FOR_A_LINES 14 + /* ===== * Voting * =====*/ @@ -430,6 +433,21 @@ _compare_vote_rs(const void **_a, const void **_b) return compare_vote_rs(a,b); } +/** Helper for sorting OR ports. */ +static int +_compare_orports(const void **_a, const void **_b) +{ + const tor_addr_port_t *a = *_a, *b = *_b; + int r; + + if ((r = tor_addr_compare(&a->addr, &b->addr, CMP_EXACT))) + return r; + if ((r = (((int) b->port) - ((int) a->port)))) + return r; + + return 0; +} + /** Given a list of vote_routerstatus_t, all for the same router identity, * return whichever is most frequent, breaking ties in favor of more * recently published vote_routerstatus_t and in case of ties there, @@ -437,7 +455,8 @@ _compare_vote_rs(const void **_a, const void **_b) */ static vote_routerstatus_t * compute_routerstatus_consensus(smartlist_t *votes, int consensus_method, - char *microdesc_digest256_out) + char *microdesc_digest256_out, + tor_addr_port_t *best_alt_orport_out) { vote_routerstatus_t *most = NULL, *cur = NULL; int most_n = 0, cur_n = 0; @@ -473,6 +492,42 @@ compute_routerstatus_consensus(smartlist_t *votes, int consensus_method, tor_assert(most); + /* If we're producing "a" lines, vote on potential alternative (sets + * of) OR port(s) in the winning routerstatuses. + * + * XXX prop186 There's at most one alternative OR port (_the_ IPv6 + * port) for now. */ + if (consensus_method >= MIN_METHOD_FOR_A_LINES && best_alt_orport_out) { + smartlist_t *alt_orports = smartlist_new(); + const tor_addr_port_t *most_alt_orport = NULL; + + SMARTLIST_FOREACH_BEGIN(votes, vote_routerstatus_t *, rs) { + if (compare_vote_rs(most, rs) == 0 && + !tor_addr_is_null(&rs->status.ipv6_addr) + && rs->status.ipv6_orport) { + smartlist_add(alt_orports, tor_addr_port_alloc(&rs->status.ipv6_addr, + rs->status.ipv6_orport)); + log_debug(LD_DIR, "picking %s:%d (%s) for voting on \"a\" lines", /* FIXME: remove */ + fmt_and_decorate_addr(&rs->status.ipv6_addr), rs->status.ipv6_orport, + rs->status.nickname); + } + } SMARTLIST_FOREACH_END(rs); + + smartlist_sort(alt_orports, _compare_orports); + most_alt_orport = smartlist_get_most_frequent(alt_orports, _compare_orports); + if (most_alt_orport) { + memcpy(best_alt_orport_out, most_alt_orport, sizeof(tor_addr_port_t)); + + log_debug(LD_DIR, "\"a\" line winner for %s is %s:%d", + most->status.nickname, + fmt_and_decorate_addr(&most_alt_orport->addr), + most_alt_orport->port); + } + + SMARTLIST_FOREACH(alt_orports, tor_addr_port_t *, ap, tor_free(ap)); + smartlist_free(alt_orports); + } + if (consensus_method >= MIN_METHOD_FOR_MICRODESC && microdesc_digest256_out) { smartlist_t *digests = smartlist_new(); @@ -1685,6 +1740,7 @@ networkstatus_compute_consensus(smartlist_t *votes, int n_listing = 0; int i; char microdesc_digest[DIGEST256_LEN]; + tor_addr_port_t alt_orport = {TOR_ADDR_NULL, 0}; /* Of the next-to-be-considered digest in each voter, which is first? */ SMARTLIST_FOREACH(votes, networkstatus_t *, v, { @@ -1754,7 +1810,7 @@ networkstatus_compute_consensus(smartlist_t *votes, * routerinfo and its contents are. */ memset(microdesc_digest, 0, sizeof(microdesc_digest)); rs = compute_routerstatus_consensus(matching_descs, consensus_method, - microdesc_digest); + microdesc_digest, &alt_orport); /* Copy bits of that into rs_out. */ memset(&rs_out, 0, sizeof(rs_out)); tor_assert(fast_memeq(lowest_id, rs->status.identity_digest,DIGEST_LEN)); @@ -1765,6 +1821,10 @@ networkstatus_compute_consensus(smartlist_t *votes, rs_out.published_on = rs->status.published_on; rs_out.dir_port = rs->status.dir_port; rs_out.or_port = rs->status.or_port; + if (consensus_method >= MIN_METHOD_FOR_A_LINES) { + tor_addr_copy(&rs_out.ipv6_addr, &alt_orport.addr); + rs_out.ipv6_orport = alt_orport.port; + } rs_out.has_bandwidth = 0; rs_out.has_exitsummary = 0; diff --git a/src/or/routerparse.c b/src/or/routerparse.c index 60a2eae..cda1c00 100644 --- a/src/or/routerparse.c +++ b/src/or/routerparse.c @@ -67,6 +67,7 @@ typedef enum { K_OR_ADDRESS, K_P, K_R, + K_A, K_S, K_V, K_W, @@ -338,6 +339,7 @@ static token_rule_t extrainfo_token_table[] = { static token_rule_t rtrstatus_token_table[] = { T01("p", K_P, CONCAT_ARGS, NO_OBJ ), T1( "r", K_R, GE(7), NO_OBJ ), + T0N("a", K_A, GE(1), NO_OBJ ), T1( "s", K_S, ARGS, NO_OBJ ), T01("v", K_V, CONCAT_ARGS, NO_OBJ ), T01("w", K_W, ARGS, NO_OBJ ), @@ -1257,6 +1259,42 @@ dump_distinct_digest_count(int severity) #endif } +/** Try to find an IPv6 OR port in list of directory_token_t's + * with at least one argument (use GE(1) in setup). If found, store + * address and port number to addr_out and + * port_out. Return number of OR ports found. */ +static int +find_single_ipv6_orport(const smartlist_t *list, + tor_addr_t *addr_out, + uint16_t *port_out) +{ + int ret = 0; + tor_assert(list != NULL); + tor_assert(addr_out != NULL); + tor_assert(port_out != NULL); + + SMARTLIST_FOREACH_BEGIN(list, directory_token_t *, t) { + tor_addr_t a; + maskbits_t bits; + uint16_t port_min, port_max; + tor_assert(t->n_args >= 1); + /* XXXX Prop186 the full spec allows much more than this. */ + if (tor_addr_parse_mask_ports(t->args[0], &a, &bits, &port_min, + &port_max) == AF_INET6 && + bits == 128 && + port_min == port_max) { + /* Okay, this is one we can understand. Use it and ignore + any potential more addresses in list. */ + tor_addr_copy(addr_out, &a); + *port_out = port_min; + ret = 1; + break; + } + } SMARTLIST_FOREACH_END(t); + + return ret; +} + /** Helper function: reads a single router entry from *s ... * *end. Mallocs a new router and returns it if all goes well, else * returns NULL. If cache_copy is true, duplicate the contents of @@ -1513,21 +1551,8 @@ router_parse_entry_from_string(const char *s, const char *end, { smartlist_t *or_addresses = find_all_by_keyword(tokens, K_OR_ADDRESS); if (or_addresses) { - SMARTLIST_FOREACH_BEGIN(or_addresses, directory_token_t *, t) { - tor_addr_t a; - maskbits_t bits; - uint16_t port_min, port_max; - /* XXXX Prop186 the full spec allows much more than this. */ - if (tor_addr_parse_mask_ports(t->args[0], &a, &bits, &port_min, - &port_max) == AF_INET6 && - bits == 128 && - port_min == port_max) { - /* Okay, this is one we can understand. */ - tor_addr_copy(&router->ipv6_addr, &a); - router->ipv6_orport = port_min; - break; - } - } SMARTLIST_FOREACH_END(t); + find_single_ipv6_orport(or_addresses, &router->ipv6_addr, + &router->ipv6_orport); smartlist_free(or_addresses); } } @@ -2060,6 +2085,14 @@ routerstatus_parse_entry_from_string(memarea_t *area, rs->dir_port = (uint16_t) tor_parse_long(tok->args[7+offset], 10,0,65535,NULL,NULL); + { + smartlist_t *a_lines = find_all_by_keyword(tokens, K_A); + if (a_lines) { + find_single_ipv6_orport(a_lines, &rs->ipv6_addr, &rs->ipv6_orport); + smartlist_free(a_lines); + } + } + tok = find_opt_by_keyword(tokens, K_S); if (tok && vote) { int i; diff --git a/src/test/test_dir.c b/src/test/test_dir.c index 84705d0..af878a6 100644 --- a/src/test/test_dir.c +++ b/src/test/test_dir.c @@ -797,6 +797,7 @@ test_dir_v3_networkstatus(void) networkstatus_t *vote=NULL, *v1=NULL, *v2=NULL, *v3=NULL, *con=NULL, *con_md=NULL; vote_routerstatus_t *vrs; + tor_addr_t addr_ipv6; routerstatus_t *rs; char *v1_text=NULL, *v2_text=NULL, *v3_text=NULL, *consensus_text=NULL, *cp; smartlist_t *votes = smartlist_new(); @@ -893,6 +894,9 @@ test_dir_v3_networkstatus(void) rs->addr = 0x99009901; rs->or_port = 443; rs->dir_port = 0; + tor_addr_parse(&addr_ipv6, "[1:2:3::4]"); + tor_addr_copy(&rs->ipv6_addr, &addr_ipv6); + rs->ipv6_orport = 4711; rs->is_exit = rs->is_stable = rs->is_fast = rs->is_flagged_running = rs->is_valid = rs->is_v2_dir = rs->is_possible_guard = 1; smartlist_add(vote->routerstatus_list, vrs); @@ -987,6 +991,8 @@ test_dir_v3_networkstatus(void) test_eq(rs->addr, 0x99009901); test_eq(rs->or_port, 443); test_eq(rs->dir_port, 0); + test_assert(tor_addr_eq(&rs->ipv6_addr, &addr_ipv6)); + test_eq(rs->ipv6_orport, 4711); test_eq(vrs->flags, U64_LITERAL(254)); // all flags except "authority." { @@ -1169,6 +1175,8 @@ test_dir_v3_networkstatus(void) test_eq(rs->addr, 0x99009901); test_eq(rs->or_port, 443); test_eq(rs->dir_port, 0); + test_assert(tor_addr_eq(&rs->ipv6_addr, &addr_ipv6)); + test_eq(rs->ipv6_orport, 4711); test_assert(!rs->is_authority); test_assert(rs->is_exit); test_assert(rs->is_fast);

1 0

[tor/master] Generate microdescriptors with "a" lines.
by nickm＠torproject.org 04 Sep '12

04 Sep '12

commit 68901da5a1dcfb210f7e8210af0b63c6161f9b63 Author: Linus Nordberg <linus(a)torproject.org> Date: Fri Aug 31 23:02:19 2012 +0200 Generate microdescriptors with "a" lines. Generate and store all supported microdescriptor formats. Generate votes with one "m" line for each format. Only "m" lines with version info matching chosen consensus method will be voted upon. An optimisation would be to combine "m" lines with identical hashes, i.e. instead of "m 1,2,3 H1" and "m 4,5 H1", say "m 1,2,3,4,5 H1". --- src/or/dirserv.c | 37 +++++++++++++++++++++-------- src/or/dirvote.c | 69 ++++++++++++++++++++--------------------------------- src/or/dirvote.h | 33 +++++++++++++++++++++++-- 3 files changed, 83 insertions(+), 56 deletions(-) diff --git a/src/or/dirserv.c b/src/or/dirserv.c index 5814171..44e5291 100644 --- a/src/or/dirserv.c +++ b/src/or/dirserv.c @@ -62,6 +62,16 @@ static cached_dir_t *the_directory = NULL; /** For authoritative directories: the current (v1) network status. */ static cached_dir_t the_runningrouters; +/** Array of start and end of consensus methods used for supported + microdescriptor formats. */ +static const struct consensus_method_range_t { + int low; + int high; +} microdesc_consensus_methods[] = { + {MIN_METHOD_FOR_MICRODESC, MIN_METHOD_FOR_A_LINES - 1}, + {MIN_METHOD_FOR_A_LINES, MAX_SUPPORTED_CONSENSUS_METHOD}, + {-1, -1}}; + static void directory_remove_invalid(void); static cached_dir_t *dirserv_regenerate_directory(void); static char *format_versions_list(config_line_t *ln); @@ -2685,7 +2695,8 @@ dirserv_read_measured_bandwidths(const char *from_file, } /** Return a new networkstatus_t* containing our current opinion. (For v3 - * authorities) */ + * authorities) + */ networkstatus_t * dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key, authority_cert_t *cert) @@ -2757,6 +2768,7 @@ dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key, microdescriptors = smartlist_new(); SMARTLIST_FOREACH_BEGIN(routers, routerinfo_t *, ri) { + const struct consensus_method_range_t *cmr = NULL; if (ri->cache_info.published_on >= cutoff) { routerstatus_t *rs; vote_routerstatus_t *vrs; @@ -2778,15 +2790,20 @@ dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key, rs->is_flagged_running = 0; vrs->version = version_from_platform(ri->platform); - md = dirvote_create_microdescriptor(ri); - if (md) { - char buf[128]; - vote_microdesc_hash_t *h; - dirvote_format_microdesc_vote_line(buf, sizeof(buf), md); - h = tor_malloc(sizeof(vote_microdesc_hash_t)); - h->microdesc_hash_line = tor_strdup(buf); - h->next = NULL; - vrs->microdesc = h; + for (cmr = microdesc_consensus_methods; + cmr->low != -1 && cmr->high != -1; + cmr++) { + md = dirvote_create_microdescriptor(ri, cmr->low); + if (md) { + char buf[128]; + vote_microdesc_hash_t *h; + dirvote_format_microdesc_vote_line(buf, sizeof(buf), md, + cmr->low, cmr->high); + h = tor_malloc(sizeof(vote_microdesc_hash_t)); + h->microdesc_hash_line = tor_strdup(buf); + h->next = vrs->microdesc; + vrs->microdesc = h; + } md->last_listed = now; smartlist_add(microdescriptors, md); } diff --git a/src/or/dirvote.c b/src/or/dirvote.c index 9056cf5..e6601cf 100644 --- a/src/or/dirvote.c +++ b/src/or/dirvote.c @@ -53,32 +53,6 @@ static int dirvote_compute_consensuses(void); static int dirvote_publish_consensus(void); static char *make_consensus_method_list(int low, int high, const char *sep); -/** The highest consensus method that we currently support. */ -#define MAX_SUPPORTED_CONSENSUS_METHOD 14 - -/** Lowest consensus method that contains a 'directory-footer' marker */ -#define MIN_METHOD_FOR_FOOTER 9 - -/** Lowest consensus method that contains bandwidth weights */ -#define MIN_METHOD_FOR_BW_WEIGHTS 9 - -/** Lowest consensus method that contains consensus params */ -#define MIN_METHOD_FOR_PARAMS 7 - -/** Lowest consensus method that generates microdescriptors */ -#define MIN_METHOD_FOR_MICRODESC 8 - -/** Lowest consensus method that ensures a majority of authorities voted - * for a param. */ -#define MIN_METHOD_FOR_MAJORITY_PARAMS 12 - -/** Lowest consensus method where microdesc consensuses omit any entry - * with no microdesc. */ -#define MIN_METHOD_FOR_MANDATORY_MICRODESC 13 - -/** Lowest consensus method that contains "a" lines. */ -#define MIN_METHOD_FOR_A_LINES 14 - /* ===== * Voting * =====*/ @@ -3570,7 +3544,7 @@ dirvote_get_vote(const char *fp, int flags) * particular method. **/ microdesc_t * -dirvote_create_microdescriptor(const routerinfo_t *ri) +dirvote_create_microdescriptor(const routerinfo_t *ri, int consensus_method) { microdesc_t *result = NULL; char *key = NULL, *summary = NULL, *family = NULL; @@ -3586,6 +3560,12 @@ dirvote_create_microdescriptor(const routerinfo_t *ri) smartlist_add_asprintf(chunks, "onion-key\n%s", key); + if (consensus_method >= MIN_METHOD_FOR_A_LINES && + !tor_addr_is_null(&ri->ipv6_addr) && ri->ipv6_orport) + smartlist_add_asprintf(chunks, "a %s:%d\n", + fmt_and_decorate_addr(&ri->ipv6_addr), + ri->ipv6_orport); + if (family) smartlist_add_asprintf(chunks, "family %s\n", family); @@ -3619,33 +3599,36 @@ dirvote_create_microdescriptor(const routerinfo_t *ri) return result; } -/** Cached space-separated string to hold */ -static char *microdesc_consensus_methods = NULL; - /** Format the appropriate vote line to describe the microdescriptor md * in a consensus vote document. Write it into the out_len-byte buffer * in out. Return -1 on failure and the number of characters written * on success. */ ssize_t -dirvote_format_microdesc_vote_line(char *out, size_t out_len, - const microdesc_t *md) +dirvote_format_microdesc_vote_line(char *out_buf, size_t out_buf_len, + const microdesc_t *md, + int consensus_method_low, + int consensus_method_high) { + int ret = -1; char d64[BASE64_DIGEST256_LEN+1]; - if (!microdesc_consensus_methods) { - microdesc_consensus_methods = - make_consensus_method_list(MIN_METHOD_FOR_MICRODESC, - MAX_SUPPORTED_CONSENSUS_METHOD, - ","); - tor_assert(microdesc_consensus_methods); - } + char *microdesc_consensus_methods = + make_consensus_method_list(consensus_method_low, + consensus_method_high, + ","); + tor_assert(microdesc_consensus_methods); + if (digest256_to_base64(d64, md->digest)<0) - return -1; + goto out; - if (tor_snprintf(out, out_len, "m %s sha256=%s\n", + if (tor_snprintf(out_buf, out_buf_len, "m %s sha256=%s\n", microdesc_consensus_methods, d64)<0) - return -1; + goto out; - return strlen(out); + ret = strlen(out_buf); + + out: + tor_free(microdesc_consensus_methods); + return ret; } /** If vrs has a hash made for the consensus method method with diff --git a/src/or/dirvote.h b/src/or/dirvote.h index e6f9700..b3feeff 100644 --- a/src/or/dirvote.h +++ b/src/or/dirvote.h @@ -19,6 +19,32 @@ /** Smallest allowable voting interval. */ #define MIN_VOTE_INTERVAL 300 +/** The highest consensus method that we currently support. */ +#define MAX_SUPPORTED_CONSENSUS_METHOD 14 + +/** Lowest consensus method that contains a 'directory-footer' marker */ +#define MIN_METHOD_FOR_FOOTER 9 + +/** Lowest consensus method that contains bandwidth weights */ +#define MIN_METHOD_FOR_BW_WEIGHTS 9 + +/** Lowest consensus method that contains consensus params */ +#define MIN_METHOD_FOR_PARAMS 7 + +/** Lowest consensus method that generates microdescriptors */ +#define MIN_METHOD_FOR_MICRODESC 8 + +/** Lowest consensus method that ensures a majority of authorities voted + * for a param. */ +#define MIN_METHOD_FOR_MAJORITY_PARAMS 12 + +/** Lowest consensus method where microdesc consensuses omit any entry + * with no microdesc. */ +#define MIN_METHOD_FOR_MANDATORY_MICRODESC 13 + +/** Lowest consensus method that contains "a" lines. */ +#define MIN_METHOD_FOR_A_LINES 14 + void dirvote_free_all(void); /* vote manipulation */ @@ -70,10 +96,11 @@ networkstatus_t * dirserv_generate_networkstatus_vote_obj(crypto_pk_t *private_key, authority_cert_t *cert); -microdesc_t *dirvote_create_microdescriptor(const routerinfo_t *ri); +microdesc_t *dirvote_create_microdescriptor(const routerinfo_t *ri, int consensus_method); ssize_t dirvote_format_microdesc_vote_line(char *out, size_t out_len, - const microdesc_t *md); - + const microdesc_t *md, + int consensus_method_low, + int consensus_method_high); int vote_routerstatus_find_microdesc_hash(char *digest256_out, const vote_routerstatus_t *vrs, int method,

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tor-commits September 2012