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When checking if a routerstatus is reachable, don't check the node

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This fixes #19608, allowing IPv6-only clients to use
microdescriptors, while preserving the ability of bridge clients
to have some IPv4 bridges and some IPv6 bridges.

Fix on c281c036 in 0.2.8.2-alpha.
This commit is contained in:
teor (Tim Wilson-Brown) 2016-07-06 14:35:01 +10:00
parent 4f4d77c435
commit b167e82f62
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GPG Key ID: 450CBA7F968F094B
2 changed files with 21 additions and 21 deletions
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6
changes/bug19608 Normal file
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@ -0,0 +1,6 @@
o Minor bugfixes (IPv6, microdescriptors):
- Don't check node addresses when we only have a routerstatus.
This allows IPv6-only clients to bootstrap by fetching
microdescriptors from fallback directory mirrors.
(The microdescriptor consensus has no IPv6 addresses in it.)
Fixes bug 19608; bugfix on c281c036 in 0.2.8.2-alpha.

24
src/or/policies.c
View File

@ -618,7 +618,7 @@ fascist_firewall_allows_ri_impl(const routerinfo_t *ri,
pref_ipv6);
}
/** Like fascist_firewall_allows_rs, but doesn't consult the node. */
/** Like fascist_firewall_allows_rs, but takes pref_ipv6. */
static int
fascist_firewall_allows_rs_impl(const routerstatus_t *rs,
firewall_connection_t fw_connection,
@ -636,10 +636,11 @@ fascist_firewall_allows_rs_impl(const routerstatus_t *rs,
}
/** Like fascist_firewall_allows_base(), but takes rs.
* Consults the corresponding node, then falls back to rs if node is NULL.
* This should only happen when there's no valid consensus, and rs doesn't
* correspond to a bridge client's bridge.
*/
* When rs is a fake_status from a dir_server_t, it can have a reachable
* address, even when the corresponding node does not.
* nodes can be missing addresses when there's no consensus (IPv4 and IPv6),
* or when there is a microdescriptor consensus, but no microdescriptors
* (microdescriptors have IPv6, the microdesc consensus does not). */
int
fascist_firewall_allows_rs(const routerstatus_t *rs,
firewall_connection_t fw_connection, int pref_only)
@ -648,13 +649,8 @@ fascist_firewall_allows_rs(const routerstatus_t *rs,
return 0;
}
const node_t *node = node_get_by_id(rs->identity_digest);
if (node) {
return fascist_firewall_allows_node(node, fw_connection, pref_only);
} else {
/* There's no node-specific IPv6 preference, so use the generic IPv6
* preference instead. */
/* We don't have access to the node-specific IPv6 preference, so use the
* generic IPv6 preference instead. */
const or_options_t *options = get_options();
int pref_ipv6 = (fw_connection == FIREWALL_OR_CONNECTION
? fascist_firewall_prefer_ipv6_orport(options)
@ -663,7 +659,6 @@ fascist_firewall_allows_rs(const routerstatus_t *rs,
return fascist_firewall_allows_rs_impl(rs, fw_connection, pref_only,
pref_ipv6);
}
}
/** Return true iff we think our firewall will let us make a connection to
* ipv6_addr:ipv6_orport based on ReachableORAddresses.
@ -742,8 +737,7 @@ fascist_firewall_allows_dir_server(const dir_server_t *ds,
/* A dir_server_t always has a fake_status. As long as it has the same
* addresses/ports in both fake_status and dir_server_t, this works fine.
* (See #17867.)
* This function relies on fascist_firewall_choose_address_rs looking up the
* node if it can, because that will get the latest info for the relay. */
* fascist_firewall_allows_rs only checks the addresses in fake_status. */
return fascist_firewall_allows_rs(&ds->fake_status, fw_connection,
pref_only);
}