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Remove TunnelDirConns and PreferTunnelledDirConns

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These options were added back in 0.1.2.5-alpha, but no longer make any
sense now that all directories support tunneled connections and
BEGIN_DIR cells.  These options were on by default; now they are
always-on.

This is a fix for 10849, where TunnelDirConns 0 would break hidden
services -- and that bug arrived, I think, in 0.2.0.10-alpha.
This commit is contained in:
Nick Mathewson 2014-02-11 11:10:55 -05:00
parent cb065a55bd
commit ce450bddb7
7 changed files with 13 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
changes/bug10849_025 Normal file
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@ -0,0 +1,6 @@
o Removed code:
- The TunnelDirConns and PreferTunnelledDirConns options no longer
exist; tunneled directory connections have been available since
0.1.2.5-alpha, and turning them off is not a good idea. This is a
brute-force fix for 10849, where "TunnelDirConns 0" would break
hidden services.

9
doc/tor.1.txt
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@ -584,15 +584,6 @@ GENERAL OPTIONS
This is useful when running on flash memory or other media that support
only a limited number of writes. (Default: 0)
[[TunnelDirConns]] **TunnelDirConns** **0**|**1**::
If non-zero, when a directory server we contact supports it, we will build
a one-hop circuit and make an encrypted connection via its ORPort.
(Default: 1)
[[PreferTunneledDirConns]] **PreferTunneledDirConns** **0**|**1**::
If non-zero, we will avoid directory servers that don't support tunneled
directory connections, when possible. (Default: 1)
[[CircuitPriorityHalflife]] **CircuitPriorityHalflife** __NUM1__::
If this value is set, we override the default algorithm for choosing which
circuit's cell to deliver or relay next. When the value is 0, we

15
src/or/config.c
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@ -354,7 +354,7 @@ static config_var_t option_vars_[] = {
V(OptimisticData, AUTOBOOL, "auto"),
V(PortForwarding, BOOL, "0"),
V(PortForwardingHelper, FILENAME, "tor-fw-helper"),
V(PreferTunneledDirConns, BOOL, "1"),
OBSOLETE("PreferTunneledDirConns"),
V(ProtocolWarnings, BOOL, "0"),
V(PublishServerDescriptor, CSV, "1"),
V(PublishHidServDescriptors, BOOL, "1"),
@ -409,7 +409,7 @@ static config_var_t option_vars_[] = {
V(TransListenAddress, LINELIST, NULL),
VPORT(TransPort, LINELIST, NULL),
V(TransProxyType, STRING, "default"),
V(TunnelDirConns, BOOL, "1"),
OBSOLETE("TunnelDirConns"),
V(UpdateBridgesFromAuthority, BOOL, "0"),
V(UseBridges, BOOL, "0"),
V(UseEntryGuards, BOOL, "1"),
@ -3213,8 +3213,6 @@ options_validate(or_options_t *old_options, or_options_t *options,
if (options->UseBridges && !options->Bridges)
REJECT("If you set UseBridges, you must specify at least one bridge.");
if (options->UseBridges && !options->TunnelDirConns)
REJECT("If you set UseBridges, you must set TunnelDirConns.");
for (cl = options->Bridges; cl; cl = cl->next) {
bridge_line_t *bridge_line = parse_bridge_line(cl->value);
@ -3338,15 +3336,6 @@ options_validate(or_options_t *old_options, or_options_t *options,
AF_INET6, 1, msg)<0)
return -1;
if (options->PreferTunneledDirConns && !options->TunnelDirConns)
REJECT("Must set TunnelDirConns if PreferTunneledDirConns is set.");
if ((options->Socks4Proxy || options->Socks5Proxy) &&
!options->HTTPProxy && !options->PreferTunneledDirConns)
REJECT("When Socks4Proxy or Socks5Proxy is configured, "
"PreferTunneledDirConns and TunnelDirConns must both be "
"set to 1, or HTTPProxy must be configured.");
if (options->AutomapHostsSuffixes) {
SMARTLIST_FOREACH(options->AutomapHostsSuffixes, char *, suf,
{

6
src/or/directory.c
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@ -347,8 +347,6 @@ should_use_directory_guards(const or_options_t *options)
if (options->DownloadExtraInfo || options->FetchDirInfoEarly ||
options->FetchDirInfoExtraEarly || options->FetchUselessDescriptors)
return 0;
if (! options->PreferTunneledDirConns)
return 0;
return 1;
}
@ -860,6 +858,7 @@ directory_command_should_use_begindir(const or_options_t *options,
int or_port, uint8_t router_purpose,
dir_indirection_t indirection)
{
(void) router_purpose;
if (!or_port)
return 0; /* We don't know an ORPort -- no chance. */
if (indirection == DIRIND_DIRECT_CONN || indirection == DIRIND_ANON_DIRPORT)
@ -868,9 +867,6 @@ directory_command_should_use_begindir(const or_options_t *options,
if (!fascist_firewall_allows_address_or(addr, or_port) ||
directory_fetches_from_authorities(options))
return 0; /* We're firewalled or are acting like a relay -- also no. */
if (!options->TunnelDirConns &&
router_purpose != ROUTER_PURPOSE_BRIDGE)
return 0; /* We prefer to avoid using begindir conns. Fine. */
return 1;
}

2
src/or/entrynodes.c
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@ -376,7 +376,7 @@ add_an_entry_guard(const node_t *chosen, int reset_status, int prepend,
} else {
const routerstatus_t *rs;
rs = router_pick_directory_server(MICRODESC_DIRINFO|V3_DIRINFO,
PDS_PREFER_TUNNELED_DIR_CONNS_|PDS_FOR_GUARD);
PDS_FOR_GUARD);
if (!rs)
return NULL;
node = node_get_by_id(rs->identity_digest);

6
src/or/or.h
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@ -3897,10 +3897,6 @@ typedef struct {
* testing our DNS server. */
int EnforceDistinctSubnets; /**< If true, don't allow multiple routers in the
* same network zone in the same circuit. */
int TunnelDirConns; /**< If true, use BEGIN_DIR rather than BEGIN when
* possible. */
int PreferTunneledDirConns; /**< If true, avoid dirservers that don't
* support BEGIN_DIR, when possible. */
int PortForwarding; /**< If true, use NAT-PMP or UPnP to automatically
* forward the DirPort and ORPort on the NAT device */
char *PortForwardingHelper; /** < Filename or full path of the port
@ -4984,8 +4980,6 @@ typedef struct dir_server_t {
* node that's currently a guard. */
#define PDS_FOR_GUARD (1<<5)
#define PDS_PREFER_TUNNELED_DIR_CONNS_ (1<<16)
/** Possible ways to weight routers when choosing one randomly. See
* routerlist_sl_choose_by_bandwidth() for more information.*/
typedef enum bandwidth_weight_rule_t {

17
src/or/routerlist.c
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@ -1250,8 +1250,6 @@ const routerstatus_t *
router_pick_directory_server(dirinfo_type_t type, int flags)
{
const routerstatus_t *choice;
if (get_options()->PreferTunneledDirConns)
flags |= PDS_PREFER_TUNNELED_DIR_CONNS_;
if (!routerlist)
return NULL;
@ -1385,8 +1383,6 @@ router_pick_dirserver_generic(smartlist_t *sourcelist,
{
const routerstatus_t *choice;
int busy = 0;
if (get_options()->PreferTunneledDirConns)
flags |= PDS_PREFER_TUNNELED_DIR_CONNS_;
choice = router_pick_trusteddirserver_impl(sourcelist, type, flags, &busy);
if (choice || !(flags & PDS_RETRY_IF_NO_SERVERS))
@ -1411,10 +1407,7 @@ router_pick_dirserver_generic(smartlist_t *sourcelist,
/** Pick a random running valid directory server/mirror from our
* routerlist. Arguments are as for router_pick_directory_server(), except
* that RETRY_IF_NO_SERVERS is ignored, and:
*
* If the PDS_PREFER_TUNNELED_DIR_CONNS_ flag is set, prefer directory servers
* that we can use with BEGINDIR.
* that RETRY_IF_NO_SERVERS is ignored.
*/
static const routerstatus_t *
router_pick_directory_server_impl(dirinfo_type_t type, int flags)
@ -1428,7 +1421,6 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags)
const networkstatus_t *consensus = networkstatus_get_latest_consensus();
int requireother = ! (flags & PDS_ALLOW_SELF);
int fascistfirewall = ! (flags & PDS_IGNORE_FASCISTFIREWALL);
int prefer_tunnel = (flags & PDS_PREFER_TUNNELED_DIR_CONNS_);
int for_guard = (flags & PDS_FOR_GUARD);
int try_excluding = 1, n_excluded = 0;
@ -1481,8 +1473,7 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags)
is_overloaded = status->last_dir_503_at + DIR_503_TIMEOUT > now;
if (prefer_tunnel &&
(!fascistfirewall ||
if ((!fascistfirewall ||
fascist_firewall_allows_address_or(&addr, status->or_port)))
smartlist_add(is_trusted ? trusted_tunnel :
is_overloaded ? overloaded_tunnel : tunnel, (void*)node);
@ -1569,7 +1560,6 @@ router_pick_trusteddirserver_impl(const smartlist_t *sourcelist,
time_t now = time(NULL);
const int requireother = ! (flags & PDS_ALLOW_SELF);
const int fascistfirewall = ! (flags & PDS_IGNORE_FASCISTFIREWALL);
const int prefer_tunnel = (flags & PDS_PREFER_TUNNELED_DIR_CONNS_);
const int no_serverdesc_fetching =(flags & PDS_NO_EXISTING_SERVERDESC_FETCH);
const int no_microdesc_fetching =(flags & PDS_NO_EXISTING_MICRODESC_FETCH);
const double auth_weight = (sourcelist == fallback_dir_servers) ?
@ -1630,8 +1620,7 @@ router_pick_trusteddirserver_impl(const smartlist_t *sourcelist,
}
}
if (prefer_tunnel &&
d->or_port &&
if (d->or_port &&
(!fascistfirewall ||
fascist_firewall_allows_address_or(&addr, d->or_port)))
smartlist_add(is_overloaded ? overloaded_tunnel : tunnel, (void*)d);