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Merge remote-tracking branch 'teor/feature17840-v11-merged-v2'

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This commit is contained in:
Nick Mathewson 2016-02-11 12:20:20 -05:00
commit ba2be81fc3
25 changed files with 2600 additions and 328 deletions
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9
changes/feature17840 Normal file
View File

@ -0,0 +1,9 @@
o Minor feature (IPv6):
- Add ClientUseIPv4, which is set to 1 by default. If set to 0, tor
avoids using IPv4 for client OR and directory connections.
- Add ClientPreferIPv6DirPort, which is set to 0 by default. If set
to 1, tor prefers IPv6 directory addresses.
- Try harder to fulfil IP version restrictions ClientUseIPv4 0 and
ClientUseIPv6 0; and the preferences ClientPreferIPv6ORPort and
ClientPreferIPv6DirPort.
Closes ticket 17840; patch by "teor".

39
doc/tor.1.txt
View File

@ -390,6 +390,7 @@ GENERAL OPTIONS
authorities.
By default, the directory authorities are also FallbackDirs. Specifying a
FallbackDir replaces Tor's default hard-coded FallbackDirs (if any).
(See the **DirAuthority** entry for an explanation of each flag.)
[[UseDefaultFallbackDirs]] **UseDefaultFallbackDirs** **0**|**1**::
Use Tor's default hard-coded FallbackDirs (if any). (When a
@ -413,6 +414,10 @@ GENERAL OPTIONS
if an "ipv6=__address__:__orport__" flag is present, then the directory
authority is listening for IPv6 connections on the indicated IPv6 address
and OR Port. +
+
Tor will contact the authority at __address__:__port__ (the DirPort) to
download directory documents. If an IPv6 address is supplied, Tor will
also download directory documents at the IPv6 address on the DirPort. +
+
If no **DirAuthority** line is given, Tor will use the default directory
authorities. NOTE: this option is intended for setting up a private Tor
@ -1506,17 +1511,33 @@ The following options are useful only for clients (that is, if
If no defaults are available there, these options default to 20, .80,
.60, and 100, respectively.
[[ClientUseIPv6]] **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** line will try connecting over IPv6 even if
**ClientUseIPv6** is set to 0. (Default: 0)
[[ClientUseIPv4]] **ClientUseIPv4** **0**|**1**::
If this option is set to 0, Tor will avoid connecting to directory servers
and entry nodes over IPv4. Note that clients with an IPv4
address in a **Bridge**, proxy, or pluggable transport line will try
connecting over IPv4 even if **ClientUseIPv4** is set to 0. (Default: 1)
[[ClientPreferIPv6ORPort]] **ClientPreferIPv6ORPort** **0**|**1**::
[[ClientUseIPv6]] **ClientUseIPv6** **0**|**1**::
If this option is set to 1, Tor might connect to directory servers or
entry nodes over IPv6. Note that clients configured with an IPv6 address
in a **Bridge**, proxy, or pluggable transport line will try connecting
over IPv6 even if **ClientUseIPv6** is set to 0. (Default: 0)
[[ClientPreferIPv6DirPort]] **ClientPreferIPv6DirPort** **0**|**1**|**auto**::
If this option is set to 1, Tor prefers a directory port with an IPv6
address over one with IPv4, for direct connections, if a given directory
server has both. (Tor also prefers an IPv6 DirPort if IPv4Client is set to
0.) If this option is set to auto, clients prefer IPv4. Other things may
influence the choice. This option breaks a tie to the favor of IPv6.
(Default: auto)
[[ClientPreferIPv6ORPort]] **ClientPreferIPv6ORPort** **0**|**1**|**auto**::
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)
address over one with IPv4 if a given entry node has both. (Tor also
prefers an IPv6 ORPort if IPv4Client is set to 0.) If this option is set
to auto, Tor bridge clients prefer the configured bridge address, and
other clients prefer IPv4. Other things may influence the choice. This
option breaks a tie to the favor of IPv6. (Default: auto)
[[PathsNeededToBuildCircuits]] **PathsNeededToBuildCircuits** __NUM__::
Tor clients don't build circuits for user traffic until they know

53
src/common/address.c
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@ -910,6 +910,59 @@ tor_addr_is_loopback(const tor_addr_t *addr)
}
}
/* Is addr valid?
* Checks that addr is non-NULL and not tor_addr_is_null().
* If for_listening is true, IPv4 addr 0.0.0.0 is allowed.
* It means "bind to all addresses on the local machine". */
int
tor_addr_is_valid(const tor_addr_t *addr, int for_listening)
{
/* NULL addresses are invalid regardless of for_listening */
if (addr == NULL) {
return 0;
}
/* Only allow IPv4 0.0.0.0 for_listening. */
if (for_listening && addr->family == AF_INET
&& tor_addr_to_ipv4h(addr) == 0) {
return 1;
}
/* Otherwise, the address is valid if it's not tor_addr_is_null() */
return !tor_addr_is_null(addr);
}
/* Is the network-order IPv4 address v4n_addr valid?
* Checks that addr is not zero.
* Except if for_listening is true, where IPv4 addr 0.0.0.0 is allowed. */
int
tor_addr_is_valid_ipv4n(uint32_t v4n_addr, int for_listening)
{
/* Any IPv4 address is valid with for_listening. */
if (for_listening) {
return 1;
}
/* Otherwise, zero addresses are invalid. */
return v4n_addr != 0;
}
/* Is port valid?
* Checks that port is not 0.
* Except if for_listening is true, where port 0 is allowed.
* It means "OS chooses a port". */
int
tor_port_is_valid(uint16_t port, int for_listening)
{
/* Any port value is valid with for_listening. */
if (for_listening) {
return 1;
}
/* Otherwise, zero ports are invalid. */
return port != 0;
}
/** Set <b>dest</b> to equal the IPv4 address in <b>v4addr</b> (given in
* network order). */
void

21
src/common/address.h
View File

@ -267,6 +267,27 @@ void tor_addr_from_in6(tor_addr_t *dest, const struct in6_addr *in6);
int tor_addr_is_null(const tor_addr_t *addr);
int tor_addr_is_loopback(const tor_addr_t *addr);
int tor_addr_is_valid(const tor_addr_t *addr, int for_listening);
int tor_addr_is_valid_ipv4n(uint32_t v4n_addr, int for_listening);
#define tor_addr_is_valid_ipv4h(v4h_addr, for_listening) \
tor_addr_is_valid_ipv4n(htonl(v4h_addr), (for_listening))
int tor_port_is_valid(uint16_t port, int for_listening);
/* Are addr and port both valid? */
#define tor_addr_port_is_valid(addr, port, for_listening) \
(tor_addr_is_valid((addr), (for_listening)) && \
tor_port_is_valid((port), (for_listening)))
/* Are ap->addr and ap->port both valid? */
#define tor_addr_port_is_valid_ap(ap, for_listening) \
tor_addr_port_is_valid(&(ap)->addr, (ap)->port, (for_listening))
/* Are the network-order v4addr and port both valid? */
#define tor_addr_port_is_valid_ipv4n(v4n_addr, port, for_listening) \
(tor_addr_is_valid_ipv4n((v4n_addr), (for_listening)) && \
tor_port_is_valid((port), (for_listening)))
/* Are the host-order v4addr and port both valid? */
#define tor_addr_port_is_valid_ipv4h(v4h_addr, port, for_listening) \
(tor_addr_is_valid_ipv4h((v4h_addr), (for_listening)) && \
tor_port_is_valid((port), (for_listening)))
int tor_addr_port_split(int severity, const char *addrport,
char **address_out, uint16_t *port_out);

48
src/or/circuitbuild.c
View File

@ -1778,7 +1778,7 @@ pick_tor2web_rendezvous_node(router_crn_flags_t flags,
router_add_running_nodes_to_smartlist(all_live_nodes,
allow_invalid,
0, 0, 0,
need_desc);
need_desc, 0);
/* Filter all_live_nodes to only add live *and* whitelisted RPs to
* the list whitelisted_live_rps. */
@ -2144,7 +2144,9 @@ choose_good_entry_server(uint8_t purpose, cpath_build_state_t *state)
const node_t *choice;
smartlist_t *excluded;
const or_options_t *options = get_options();
router_crn_flags_t flags = CRN_NEED_GUARD|CRN_NEED_DESC;
/* If possible, choose an entry server with a preferred address,
* otherwise, choose one with an allowed address */
router_crn_flags_t flags = CRN_NEED_GUARD|CRN_NEED_DESC|CRN_PREF_ADDR;
const node_t *node;
if (state && options->UseEntryGuards &&
@ -2161,14 +2163,6 @@ choose_good_entry_server(uint8_t purpose, cpath_build_state_t *state)
* family. */
nodelist_add_node_and_family(excluded, node);
}
if (firewall_is_fascist_or()) {
/* Exclude all ORs that we can't reach through our firewall */
smartlist_t *nodes = nodelist_get_list();
SMARTLIST_FOREACH(nodes, const node_t *, node, {
if (!fascist_firewall_allows_node(node))
smartlist_add(excluded, (void*)node);
});
}
/* and exclude current entry guards and their families,
* unless we're in a test network, and excluding guards
* would exclude all nodes (i.e. we're in an incredibly small tor network,
@ -2247,9 +2241,11 @@ onion_extend_cpath(origin_circuit_t *circ)
if (r) {
/* 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);
port. Servers always want the primary (IPv4) address. */
int client = (server_mode(get_options()) == 0);
info = extend_info_from_node(r, client);
/* Clients can fail to find an allowed address */
tor_assert(info || client);
}
} else {
const node_t *r =
@ -2324,33 +2320,43 @@ extend_info_new(const char *nickname, const char *digest,
* <b>for_direct_connect</b> is true, in which case the preferred
* address is used instead. May return NULL if there is not enough
* info about <b>node</b> to extend to it--for example, if there is no
* routerinfo_t or microdesc_t.
* routerinfo_t or microdesc_t, or if for_direct_connect is true and none of
* the node's addresses are allowed by tor's firewall and IP version config.
**/
extend_info_t *
extend_info_from_node(const node_t *node, int for_direct_connect)
{
tor_addr_port_t ap;
int valid_addr = 0;
if (node->ri == NULL && (node->rs == NULL || node->md == NULL))
return NULL;
/* Choose a preferred address first, but fall back to an allowed address.
* choose_address returns 1 on success, but get_prim_orport returns 0. */
if (for_direct_connect)
node_get_pref_orport(node, &ap);
valid_addr = fascist_firewall_choose_address_node(node,
FIREWALL_OR_CONNECTION,
0, &ap);
else
node_get_prim_orport(node, &ap);
valid_addr = !node_get_prim_orport(node, &ap);
log_debug(LD_CIRC, "using %s for %s",
fmt_addrport(&ap.addr, ap.port),
node->ri ? node->ri->nickname : node->rs->nickname);
if (valid_addr)
log_debug(LD_CIRC, "using %s for %s",
fmt_addrport(&ap.addr, ap.port),
node->ri ? node->ri->nickname : node->rs->nickname);
else
log_warn(LD_CIRC, "Could not choose valid address for %s",
node->ri ? node->ri->nickname : node->rs->nickname);
if (node->ri)
if (valid_addr && node->ri)
return extend_info_new(node->ri->nickname,
node->identity,
node->ri->onion_pkey,
node->ri->onion_curve25519_pkey,
&ap.addr,
ap.port);
else if (node->rs && node->md)
else if (valid_addr && node->rs && node->md)
return extend_info_new(node->rs->nickname,
node->identity,
node->md->onion_pkey,

7
src/or/circuituse.c
View File

@ -2006,8 +2006,13 @@ circuit_get_open_circ_or_launch(entry_connection_t *conn,
if (r && node_has_descriptor(r)) {
/* We might want to connect to an IPv6 bridge for loading
descriptors so we use the preferred address rather than
the primary. */
the primary. */
extend_info = extend_info_from_node(r, conn->want_onehop ? 1 : 0);
if (!extend_info) {
log_warn(LD_CIRC,"Could not make a one-hop connection to %s. "
"Discarding this circuit.", conn->chosen_exit_name);
return -1;
}
} else {
log_debug(LD_DIR, "considering %d, %s",
want_onehop, conn->chosen_exit_name);

30
src/or/config.c
View File

@ -190,10 +190,12 @@ 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(ClientPreferIPv6ORPort, AUTOBOOL, "auto"),
V(ClientPreferIPv6DirPort, AUTOBOOL, "auto"),
V(ClientRejectInternalAddresses, BOOL, "1"),
V(ClientTransportPlugin, LINELIST, NULL),
V(ClientUseIPv6, BOOL, "0"),
V(ClientUseIPv4, BOOL, "1"),
V(ConsensusParams, STRING, NULL),
V(ConnLimit, UINT, "1000"),
V(ConnDirectionStatistics, BOOL, "0"),
@ -3078,6 +3080,8 @@ options_validate(or_options_t *old_options, or_options_t *options,
}
}
/* Terminate Reachable*Addresses with reject *
*/
for (i=0; i<3; i++) {
config_line_t **linep =
(i==0) ? &options->ReachableAddresses :
@ -3087,8 +3091,6 @@ options_validate(or_options_t *old_options, or_options_t *options,
continue;
/* We need to end with a reject *:*, not an implicit accept *:* */
for (;;) {
if (!strcmp((*linep)->value, "reject *:*")) /* already there */
break;
linep = &((*linep)->next);
if (!*linep) {
*linep = tor_malloc_zero(sizeof(config_line_t));
@ -3104,11 +3106,29 @@ options_validate(or_options_t *old_options, or_options_t *options,
if ((options->ReachableAddresses ||
options->ReachableORAddresses ||
options->ReachableDirAddresses) &&
options->ReachableDirAddresses ||
options->ClientUseIPv4 == 0) &&
server_mode(options))
REJECT("Servers must be able to freely connect to the rest "
"of the Internet, so they must not set Reachable*Addresses "
"or FascistFirewall.");
"or FascistFirewall or FirewallPorts or ClientUseIPv4 0.");
/* We check if Reachable*Addresses blocks all addresses in
* parse_reachable_addresses(). */
#define WARN_PLEASE_USE_IPV6_LOG_MSG \
"ClientPreferIPv6%sPort 1 is ignored unless tor is using IPv6. " \
"Please set ClientUseIPv6 1, ClientUseIPv4 0, or configure bridges."
if (!fascist_firewall_use_ipv6(options)
&& options->ClientPreferIPv6ORPort == 1)
log_warn(LD_CONFIG, WARN_PLEASE_USE_IPV6_LOG_MSG, "OR");
if (!fascist_firewall_use_ipv6(options)
&& options->ClientPreferIPv6DirPort == 1)
log_warn(LD_CONFIG, WARN_PLEASE_USE_IPV6_LOG_MSG, "Dir");
#undef WARN_PLEASE_USE_IPV6_LOG_MSG
if (options->UseBridges &&
server_mode(options))

74
src/or/connection.c
View File

@ -19,6 +19,7 @@
*/
#define TOR_CHANNEL_INTERNAL_
#define CONNECTION_PRIVATE
#include "backtrace.h"
#include "channel.h"
#include "channeltls.h"
#include "circuitbuild.h"
@ -37,6 +38,7 @@
#include "ext_orport.h"
#include "geoip.h"
#include "main.h"
#include "nodelist.h"
#include "policies.h"
#include "reasons.h"
#include "relay.h"
@ -44,6 +46,7 @@
#include "rendcommon.h"
#include "rephist.h"
#include "router.h"
#include "routerlist.h"
#include "transports.h"
#include "routerparse.h"
#include "transports.h"
@ -1714,6 +1717,67 @@ connection_connect_sockaddr,(connection_t *conn,
return inprogress ? 0 : 1;
}
/* Log a message if connection attempt is made when IPv4 or IPv6 is disabled.
* Log a less severe message if we couldn't conform to ClientPreferIPv6ORPort
* or ClientPreferIPv6ORPort. */
static void
connection_connect_log_client_use_ip_version(const connection_t *conn)
{
const or_options_t *options = get_options();
/* Only clients care about ClientUseIPv4/6, bail out early on servers, and
* on connections we don't care about */
if (server_mode(options) || !conn || conn->type == CONN_TYPE_EXIT) {
return;
}
/* We're only prepared to log OR and DIR connections here */
if (conn->type != CONN_TYPE_OR && conn->type != CONN_TYPE_DIR) {
return;
}
const int must_ipv4 = !fascist_firewall_use_ipv6(options);
const int must_ipv6 = (options->ClientUseIPv4 == 0);
const int pref_ipv6 = (conn->type == CONN_TYPE_OR
? fascist_firewall_prefer_ipv6_orport(options)
: fascist_firewall_prefer_ipv6_dirport(options));
tor_addr_t real_addr;
tor_addr_make_null(&real_addr, AF_UNSPEC);
/* OR conns keep the original address in real_addr, as addr gets overwritten
* with the descriptor address */
if (conn->type == CONN_TYPE_OR) {
const or_connection_t *or_conn = TO_OR_CONN((connection_t *)conn);
tor_addr_copy(&real_addr, &or_conn->real_addr);
} else if (conn->type == CONN_TYPE_DIR) {
tor_addr_copy(&real_addr, &conn->addr);
}
/* Check if we broke a mandatory address family restriction */
if ((must_ipv4 && tor_addr_family(&real_addr) == AF_INET6)
|| (must_ipv6 && tor_addr_family(&real_addr) == AF_INET)) {
log_warn(LD_BUG, "%s connection to %s violated ClientUseIPv%s 0.",
conn->type == CONN_TYPE_OR ? "OR" : "Dir",
fmt_addr(&real_addr),
options->ClientUseIPv4 == 0 ? "4" : "6");
log_backtrace(LOG_WARN, LD_BUG, "Address came from");
}
/* Check if we couldn't satisfy an address family preference */
if ((!pref_ipv6 && tor_addr_family(&real_addr) == AF_INET6)
|| (pref_ipv6 && tor_addr_family(&real_addr) == AF_INET)) {
log_info(LD_NET, "Connection to %s doesn't satisfy ClientPreferIPv6%sPort "
"%d, with ClientUseIPv4 %d, and fascist_firewall_use_ipv6 %d "
"(ClientUseIPv6 %d and UseBridges %d).",
fmt_addr(&real_addr),
conn->type == CONN_TYPE_OR ? "OR" : "Dir",
conn->type == CONN_TYPE_OR ? options->ClientPreferIPv6ORPort
: options->ClientPreferIPv6DirPort,
options->ClientUseIPv4, fascist_firewall_use_ipv6(options),
options->ClientUseIPv6, options->UseBridges);
}
}
/** Take conn, make a nonblocking socket; try to connect to
* addr:port (port arrives in *host order*). If fail, return -1 and if
* applicable put your best guess about errno into *<b>socket_error</b>.
@ -1738,6 +1802,10 @@ connection_connect(connection_t *conn, const char *address,
const or_options_t *options = get_options();
int protocol_family;
/* Log if we didn't stick to ClientUseIPv4/6 or ClientPreferIPv6OR/DirPort
*/
connection_connect_log_client_use_ip_version(conn);
if (tor_addr_family(addr) == AF_INET6)
protocol_family = PF_INET6;
else
@ -4246,10 +4314,10 @@ connection_write_to_buf_impl_,(const char *string, size_t len,
/** Return a connection with given type, address, port, and purpose;
* or NULL if no such connection exists (or if all such connections are marked
* for close). */
connection_t *
connection_get_by_type_addr_port_purpose(int type,
MOCK_IMPL(connection_t *,
connection_get_by_type_addr_port_purpose,(int type,
const tor_addr_t *addr, uint16_t port,
int purpose)
int purpose))
{
CONN_GET_TEMPLATE(conn,
(conn->type == type &&

6
src/or/connection.h
View File

@ -186,9 +186,9 @@ connection_get_outbuf_len(connection_t *conn)
connection_t *connection_get_by_global_id(uint64_t id);
connection_t *connection_get_by_type(int type);
connection_t *connection_get_by_type_addr_port_purpose(int type,
const tor_addr_t *addr,
uint16_t port, int purpose);
MOCK_DECL(connection_t *,connection_get_by_type_addr_port_purpose,(int type,
const tor_addr_t *addr,
uint16_t port, int purpose));
connection_t *connection_get_by_type_state(int type, int state);
connection_t *connection_get_by_type_state_rendquery(int type, int state,
const char *rendquery);

18
src/or/control.c
View File

@ -2864,12 +2864,26 @@ handle_control_extendcircuit(control_connection_t *conn, uint32_t len,
}
/* now circ refers to something that is ready to be extended */
int first_node = zero_circ;
SMARTLIST_FOREACH(nodes, const node_t *, node,
{
extend_info_t *info = extend_info_from_node(node, 0);
tor_assert(info); /* True, since node_has_descriptor(node) == true */
extend_info_t *info = extend_info_from_node(node, first_node);
if (first_node && !info) {
log_warn(LD_CONTROL,
"controller tried to connect to a node that doesn't have any "
"addresses that are allowed by the firewall configuration; "
"circuit marked for closing.");
circuit_mark_for_close(TO_CIRCUIT(circ), -END_CIRC_REASON_CONNECTFAILED);
connection_write_str_to_buf("551 Couldn't start circuit\r\n", conn);
goto done;
} else {
/* True, since node_has_descriptor(node) == true and we are extending
* to the node's primary address */
tor_assert(info);
}
circuit_append_new_exit(circ, info);
extend_info_free(info);
first_node = 0;
});
/* now that we've populated the cpath, start extending */

251
src/or/directory.c
View File

@ -4,6 +4,7 @@
/* See LICENSE for licensing information */
#include "or.h"
#include "backtrace.h"
#include "buffers.h"
#include "circuitbuild.h"
#include "config.h"
@ -82,18 +83,18 @@ static void dir_microdesc_download_failed(smartlist_t *failed,
static void note_client_request(int purpose, int compressed, size_t bytes);
static int client_likes_consensus(networkstatus_t *v, const char *want_url);
static void directory_initiate_command_rend(const tor_addr_t *addr,
uint16_t or_port,
uint16_t dir_port,
const char *digest,
uint8_t dir_purpose,
uint8_t router_purpose,
dir_indirection_t indirection,
const char *resource,
const char *payload,
size_t payload_len,
time_t if_modified_since,
const rend_data_t *rend_query);
static void directory_initiate_command_rend(
const tor_addr_port_t *or_addr_port,
const tor_addr_port_t *dir_addr_port,
const char *digest,
uint8_t dir_purpose,
uint8_t router_purpose,
dir_indirection_t indirection,
const char *resource,
const char *payload,
size_t payload_len,
time_t if_modified_since,
const rend_data_t *rend_query);
/********* START VARIABLES **********/
@ -313,7 +314,6 @@ directory_post_to_dirservers(uint8_t dir_purpose, uint8_t router_purpose,
SMARTLIST_FOREACH_BEGIN(dirservers, dir_server_t *, ds) {
routerstatus_t *rs = &(ds->fake_status);
size_t upload_len = payload_len;
tor_addr_t ds_addr;
if ((type & ds->type) == 0)
continue;
@ -344,11 +344,12 @@ directory_post_to_dirservers(uint8_t dir_purpose, uint8_t router_purpose,
log_info(LD_DIR, "Uploading an extrainfo too (length %d)",
(int) extrainfo_len);
}
tor_addr_from_ipv4h(&ds_addr, ds->addr);
if (purpose_needs_anonymity(dir_purpose, router_purpose)) {
indirection = DIRIND_ANONYMOUS;
} else if (!fascist_firewall_allows_address_dir(&ds_addr,ds->dir_port)) {
if (fascist_firewall_allows_address_or(&ds_addr,ds->or_port))
} else if (!fascist_firewall_allows_dir_server(ds,
FIREWALL_DIR_CONNECTION,
0)) {
if (fascist_firewall_allows_dir_server(ds, FIREWALL_OR_CONNECTION, 0))
indirection = DIRIND_ONEHOP;
else
indirection = DIRIND_ANONYMOUS;
@ -496,11 +497,14 @@ MOCK_IMPL(void, directory_get_from_dirserver, (
const node_t *node = choose_random_dirguard(type);
if (node && node->ri) {
/* every bridge has a routerinfo. */
tor_addr_t addr;
routerinfo_t *ri = node->ri;
node_get_addr(node, &addr);
directory_initiate_command(&addr,
ri->or_port, 0/*no dirport*/,
/* clients always make OR connections to bridges */
tor_addr_port_t or_ap;
/* we are willing to use a non-preferred address if we need to */
fascist_firewall_choose_address_node(node, FIREWALL_OR_CONNECTION, 0,
&or_ap);
directory_initiate_command(&or_ap.addr, or_ap.port,
NULL, 0, /*no dirport*/
ri->cache_info.identity_digest,
dir_purpose,
router_purpose,
@ -609,6 +613,80 @@ dirind_is_anon(dir_indirection_t ind)
return ind == DIRIND_ANON_DIRPORT || ind == DIRIND_ANONYMOUS;
}
/* Choose reachable OR and Dir addresses and ports from status, copying them
* into use_or_ap and use_dir_ap. If indirection is anonymous, then we're
* connecting via another relay, so choose the primary IPv4 address and ports.
*
* status should have at least one reachable address, if we can't choose a
* reachable address, warn and return -1. Otherwise, return 0.
*/
static int
directory_choose_address_routerstatus(const routerstatus_t *status,
dir_indirection_t indirection,
tor_addr_port_t *use_or_ap,
tor_addr_port_t *use_dir_ap)
{
tor_assert(status != NULL);
tor_assert(use_or_ap != NULL);
tor_assert(use_dir_ap != NULL);
const int anonymized_connection = dirind_is_anon(indirection);
int have_or = 0, have_dir = 0;
/* We expect status to have at least one reachable address if we're
* connecting to it directly.
*
* Therefore, we can simply use the other address if the one we want isn't
* allowed by the firewall.
*
* (When Tor uploads and downloads a hidden service descriptor, it uses
* DIRIND_ANONYMOUS, except for Tor2Web, which uses DIRIND_ONEHOP.
* So this code will only modify the address for Tor2Web's HS descriptor
* fetches. Even Single Onion Servers (NYI) use DIRIND_ANONYMOUS, to avoid
* HSDirs denying service by rejecting descriptors.)
*/
/* Initialise the OR / Dir addresses */
tor_addr_make_null(&use_or_ap->addr, AF_UNSPEC);
use_or_ap->port = 0;
tor_addr_make_null(&use_dir_ap->addr, AF_UNSPEC);
use_dir_ap->port = 0;
if (anonymized_connection) {
/* Use the primary (IPv4) OR address if we're making an indirect
* connection. */
tor_addr_from_ipv4h(&use_or_ap->addr, status->addr);
use_or_ap->port = status->or_port;
have_or = 1;
} else {
/* We use an IPv6 address if we have one and we prefer it.
* Use the preferred address and port if they are reachable, otherwise,
* use the alternate address and port (if any).
*/
have_or = fascist_firewall_choose_address_rs(status,
FIREWALL_OR_CONNECTION, 0,
use_or_ap);
}
have_dir = fascist_firewall_choose_address_rs(status,
FIREWALL_DIR_CONNECTION, 0,
use_dir_ap);
/* We rejected both addresses. This isn't great. */
if (!have_or && !have_dir) {
log_warn(LD_BUG, "Rejected all OR and Dir addresses from %s when "
"launching a directory connection to: IPv4 %s OR %d Dir %d "
"IPv6 %s OR %d Dir %d", routerstatus_describe(status),
fmt_addr32(status->addr), status->or_port,
status->dir_port, fmt_addr(&status->ipv6_addr),
status->ipv6_orport, status->dir_port);
log_backtrace(LOG_WARN, LD_BUG, "Addresses came from");
return -1;
}
return 0;
}
/** Same as directory_initiate_command_routerstatus(), but accepts
* rendezvous data to fetch a hidden service descriptor. */
void
@ -624,8 +702,11 @@ directory_initiate_command_routerstatus_rend(const routerstatus_t *status,
{
const or_options_t *options = get_options();
const node_t *node;
tor_addr_t addr;
tor_addr_port_t use_or_ap, use_dir_ap;
const int anonymized_connection = dirind_is_anon(indirection);
tor_assert(status != NULL);
node = node_get_by_id(status->identity_digest);
if (!node && anonymized_connection) {
@ -634,7 +715,6 @@ directory_initiate_command_routerstatus_rend(const routerstatus_t *status,
routerstatus_describe(status));
return;
}
tor_addr_from_ipv4h(&addr, status->addr);
if (options->ExcludeNodes && options->StrictNodes &&
routerset_contains_routerstatus(options->ExcludeNodes, status, -1)) {
@ -646,13 +726,30 @@ directory_initiate_command_routerstatus_rend(const routerstatus_t *status,
return;
}
directory_initiate_command_rend(&addr,
status->or_port, status->dir_port,
status->identity_digest,
dir_purpose, router_purpose,
indirection, resource,
payload, payload_len, if_modified_since,
rend_query);
/* At this point, if we are a clients making a direct connection to a
* directory server, we have selected a server that has at least one address
* allowed by ClientUseIPv4/6 and Reachable{"",OR,Dir}Addresses. This
* selection uses the preference in ClientPreferIPv6{OR,Dir}Port, if
* possible. (If UseBridges is set, clients always use IPv6, and prefer it
* by default.)
*
* Now choose an address that we can use to connect to the directory server.
*/
if (directory_choose_address_routerstatus(status, indirection, &use_or_ap,
&use_dir_ap) < 0) {
return;
}
/* We don't retry the alternate OR/Dir address for the same directory if
* the address we choose fails (#6772).
* Instead, we'll retry another directory on failure. */
directory_initiate_command_rend(&use_or_ap, &use_dir_ap,
status->identity_digest,
dir_purpose, router_purpose,
indirection, resource,
payload, payload_len, if_modified_since,
rend_query);
}
/** Launch a new connection to the directory server <b>status</b> to
@ -874,27 +971,52 @@ directory_command_should_use_begindir(const or_options_t *options,
if (indirection == DIRIND_DIRECT_CONN || indirection == DIRIND_ANON_DIRPORT)
return 0;
if (indirection == DIRIND_ONEHOP)
if (!fascist_firewall_allows_address_or(addr, or_port) ||
if (!fascist_firewall_allows_address_addr(addr, or_port,
FIREWALL_OR_CONNECTION, 0) ||
directory_fetches_from_authorities(options))
return 0; /* We're firewalled or are acting like a relay -- also no. */
return 1;
}
/** Helper for directory_initiate_command_routerstatus: send the
* command to a server whose address is <b>address</b>, whose IP is
* <b>addr</b>, whose directory port is <b>dir_port</b>, whose tor version
* <b>supports_begindir</b>, and whose identity key digest is
* <b>digest</b>. */
/** Helper for directory_initiate_command_rend: send the
* command to a server whose OR address/port is <b>or_addr</b>/<b>or_port</b>,
* whose directory address/port is <b>dir_addr</b>/<b>dir_port</b>, whose
* identity key digest is <b>digest</b>, with purposes <b>dir_purpose</b> and
* <b>router_purpose</b>, making an (in)direct connection as specified in
* <b>indirection</b>, with command <b>resource</b>, <b>payload</b> of
* <b>payload_len</b>, and asking for a result only <b>if_modified_since</b>.
*/
void
directory_initiate_command(const tor_addr_t *_addr,
uint16_t or_port, uint16_t dir_port,
directory_initiate_command(const tor_addr_t *or_addr, uint16_t or_port,
const tor_addr_t *dir_addr, uint16_t dir_port,
const char *digest,
uint8_t dir_purpose, uint8_t router_purpose,
dir_indirection_t indirection, const char *resource,
const char *payload, size_t payload_len,
time_t if_modified_since)
{
directory_initiate_command_rend(_addr, or_port, dir_port,
tor_addr_port_t or_ap, dir_ap;
/* Use the null tor_addr and 0 port if the address or port isn't valid. */
if (tor_addr_port_is_valid(or_addr, or_port, 0)) {
tor_addr_copy(&or_ap.addr, or_addr);
or_ap.port = or_port;
} else {
/* the family doesn't matter here, so make it IPv4 */
tor_addr_make_null(&or_ap.addr, AF_INET);
or_port = 0;
}
if (tor_addr_port_is_valid(dir_addr, dir_port, 0)) {
tor_addr_copy(&dir_ap.addr, dir_addr);
dir_ap.port = dir_port;
} else {
/* the family doesn't matter here, so make it IPv4 */
tor_addr_make_null(&dir_ap.addr, AF_INET);
dir_port = 0;
}
directory_initiate_command_rend(&or_ap, &dir_ap,
digest, dir_purpose,
router_purpose, indirection,
resource, payload, payload_len,
@ -914,10 +1036,11 @@ is_sensitive_dir_purpose(uint8_t dir_purpose)
}
/** Same as directory_initiate_command(), but accepts rendezvous data to
* fetch a hidden service descriptor. */
* fetch a hidden service descriptor, and takes its address & port arguments
* as tor_addr_port_t. */
static void
directory_initiate_command_rend(const tor_addr_t *_addr,
uint16_t or_port, uint16_t dir_port,
directory_initiate_command_rend(const tor_addr_port_t *or_addr_port,
const tor_addr_port_t *dir_addr_port,
const char *digest,
uint8_t dir_purpose, uint8_t router_purpose,
dir_indirection_t indirection,
@ -926,29 +1049,34 @@ directory_initiate_command_rend(const tor_addr_t *_addr,
time_t if_modified_since,
const rend_data_t *rend_query)
{
tor_assert(or_addr_port);
tor_assert(dir_addr_port);
tor_assert(or_addr_port->port || dir_addr_port->port);
tor_assert(digest);
dir_connection_t *conn;
const or_options_t *options = get_options();
int socket_error = 0;
int use_begindir = directory_command_should_use_begindir(options, _addr,
or_port, router_purpose, indirection);
const int use_begindir = directory_command_should_use_begindir(options,
&or_addr_port->addr, or_addr_port->port,
router_purpose, indirection);
const int anonymized_connection = dirind_is_anon(indirection);
const int or_connection = use_begindir || anonymized_connection;
tor_addr_t addr;
tor_assert(_addr);
tor_assert(or_port || dir_port);
tor_assert(digest);
tor_addr_copy(&addr, _addr);
tor_addr_copy(&addr, &(or_connection ? or_addr_port : dir_addr_port)->addr);
uint16_t port = (or_connection ? or_addr_port : dir_addr_port)->port;
uint16_t dir_port = dir_addr_port->port;
log_debug(LD_DIR, "anonymized %d, use_begindir %d.",
anonymized_connection, use_begindir);
if (!dir_port && !use_begindir) {
char ipaddr[TOR_ADDR_BUF_LEN];
tor_addr_to_str(ipaddr, _addr, TOR_ADDR_BUF_LEN, 0);
tor_addr_to_str(ipaddr, &addr, TOR_ADDR_BUF_LEN, 0);
log_warn(LD_BUG, "Cannot use directory server without dirport or "
"begindir! Address: %s, ORPort: %d, DirPort: %d",
escaped_safe_str_client(ipaddr), or_port, dir_port);
"begindir! Address: %s, DirPort: %d, Connection Port: %d",
escaped_safe_str_client(ipaddr), dir_port, port);
return;
}
@ -963,13 +1091,26 @@ directory_initiate_command_rend(const tor_addr_t *_addr,
/* ensure that we don't make direct connections when a SOCKS server is
* configured. */
if (!anonymized_connection && !use_begindir && !options->HTTPProxy &&
if (!or_connection && !options->HTTPProxy &&
(options->Socks4Proxy || options->Socks5Proxy)) {
log_warn(LD_DIR, "Cannot connect to a directory server through a "
"SOCKS proxy!");
return;
}
if (or_connection && (!or_addr_port->port
|| tor_addr_is_null(&or_addr_port->addr))) {
log_warn(LD_DIR, "Cannot make an OR connection without an OR port.");
log_backtrace(LOG_WARN, LD_BUG, "Address came from");
return;
} else if (!or_connection && (!dir_addr_port->port
|| tor_addr_is_null(&dir_addr_port->addr))) {
log_warn(LD_DIR, "Cannot make a Dir connection without a Dir port.");
log_backtrace(LOG_WARN, LD_BUG, "Address came from");
return;
}
/* ensure we don't make excess connections when we're already downloading
* a consensus during bootstrap */
if (connection_dir_avoid_extra_connection_for_purpose(dir_purpose)) {
@ -980,7 +1121,7 @@ directory_initiate_command_rend(const tor_addr_t *_addr,
/* set up conn so it's got all the data we need to remember */
tor_addr_copy(&conn->base_.addr, &addr);
conn->base_.port = use_begindir ? or_port : dir_port;
conn->base_.port = port;
conn->base_.address = tor_dup_addr(&addr);
memcpy(conn->identity_digest, digest, DIGEST_LEN);
@ -998,7 +1139,7 @@ directory_initiate_command_rend(const tor_addr_t *_addr,
if (rend_query)
conn->rend_data = rend_data_dup(rend_query);
if (!anonymized_connection && !use_begindir) {
if (!or_connection) {
/* then we want to connect to dirport directly */
if (options->HTTPProxy) {

4
src/or/directory.h
View File

@ -68,8 +68,8 @@ int connection_dir_process_inbuf(dir_connection_t *conn);
int connection_dir_finished_flushing(dir_connection_t *conn);
int connection_dir_finished_connecting(dir_connection_t *conn);
void connection_dir_about_to_close(dir_connection_t *dir_conn);
void directory_initiate_command(const tor_addr_t *addr,
uint16_t or_port, uint16_t dir_port,
void directory_initiate_command(const tor_addr_t *or_addr, uint16_t or_port,
const tor_addr_t *dir_addr, uint16_t dir_port,
const char *digest,
uint8_t dir_purpose, uint8_t router_purpose,
dir_indirection_t indirection,

48
src/or/entrynodes.c
View File

@ -87,7 +87,7 @@ get_entry_guards(void)
/** Check whether the entry guard <b>e</b> is usable, given the directory
* authorities' opinion about the router (stored in <b>ri</b>) and the user's
* configuration (in <b>options</b>). Set <b>e</b>-&gt;bad_since
* configuration (in <b>options</b>). Set <b>e</b>->bad_since
* accordingly. Return true iff the entry guard's status changes.
*
* If it's not usable, set *<b>reason</b> to a static string explaining why.
@ -117,6 +117,9 @@ entry_guard_set_status(entry_guard_t *e, const node_t *node,
*reason = "not recommended as a guard";
else if (routerset_contains_node(options->ExcludeNodes, node))
*reason = "excluded";
/* We only care about OR connection connectivity for entry guards. */
else if (!fascist_firewall_allows_node(node, FIREWALL_OR_CONNECTION, 0))
*reason = "unreachable by config";
else if (e->path_bias_disabled)
*reason = "path-biased";
@ -268,7 +271,7 @@ entry_is_live(const entry_guard_t *e, entry_is_live_flags_t flags,
*msg = "not fast/stable";
return NULL;
}
if (!fascist_firewall_allows_node(node)) {
if (!fascist_firewall_allows_node(node, FIREWALL_OR_CONNECTION, 0)) {
*msg = "unreachable by config";
return NULL;
}
@ -918,7 +921,8 @@ entry_guards_set_from_config(const or_options_t *options)
} else if (routerset_contains_node(options->ExcludeNodes, node)) {
SMARTLIST_DEL_CURRENT(entry_nodes, node);
continue;
} else if (!fascist_firewall_allows_node(node)) {
} else if (!fascist_firewall_allows_node(node, FIREWALL_OR_CONNECTION,
0)) {
SMARTLIST_DEL_CURRENT(entry_nodes, node);
continue;
} else if (! node->is_possible_guard) {
@ -2116,8 +2120,17 @@ launch_direct_bridge_descriptor_fetch(bridge_info_t *bridge)
return;
}
directory_initiate_command(&bridge->addr,
bridge->port, 0/*no dirport*/,
/* Until we get a descriptor for the bridge, we only know one address for
* it. If we */
if (!fascist_firewall_allows_address_addr(&bridge->addr, bridge->port,
FIREWALL_OR_CONNECTION, 0)) {
log_notice(LD_CONFIG, "Tried to fetch a descriptor directly from a bridge, "
"but that bridge is not reachable through our firewall.");
return;
}
directory_initiate_command(&bridge->addr, bridge->port,
NULL, 0, /*no dirport*/
bridge->identity,
DIR_PURPOSE_FETCH_SERVERDESC,
ROUTER_PURPOSE_BRIDGE,
@ -2178,7 +2191,8 @@ fetch_bridge_descriptors(const or_options_t *options, time_t now)
!options->UpdateBridgesFromAuthority, !num_bridge_auths);
if (ask_bridge_directly &&
!fascist_firewall_allows_address_or(&bridge->addr, bridge->port)) {
!fascist_firewall_allows_address_addr(&bridge->addr, bridge->port,
FIREWALL_OR_CONNECTION, 0)) {
log_notice(LD_DIR, "Bridge at '%s' isn't reachable by our "
"firewall policy. %s.",
fmt_addrport(&bridge->addr, bridge->port),
@ -2226,6 +2240,7 @@ rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
* does so through an address from any source other than node_get_addr().
*/
tor_addr_t addr;
const or_options_t *options = get_options();
if (node->ri) {
routerinfo_t *ri = node->ri;
@ -2258,9 +2273,15 @@ rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
}
}
/* Mark which address to use based on which bridge_t we got. */
node->ipv6_preferred = (tor_addr_family(&bridge->addr) == AF_INET6 &&
!tor_addr_is_null(&node->ri->ipv6_addr));
if (options->ClientPreferIPv6ORPort == -1) {
/* Mark which address to use based on which bridge_t we got. */
node->ipv6_preferred = (tor_addr_family(&bridge->addr) == AF_INET6 &&
!tor_addr_is_null(&node->ri->ipv6_addr));
} else {
/* Mark which address to use based on user preference */
node->ipv6_preferred = (fascist_firewall_prefer_ipv6_orport(options) &&
!tor_addr_is_null(&node->ri->ipv6_addr));
}
/* XXXipv6 we lack support for falling back to another address for
the same relay, warn the user */
@ -2269,10 +2290,13 @@ rewrite_node_address_for_bridge(const bridge_info_t *bridge, node_t *node)
node_get_pref_orport(node, &ap);
log_notice(LD_CONFIG,
"Bridge '%s' has both an IPv4 and an IPv6 address. "
"Will prefer using its %s address (%s).",
"Will prefer using its %s address (%s) based on %s.",
ri->nickname,
tor_addr_family(&ap.addr) == AF_INET6 ? "IPv6" : "IPv4",
fmt_addrport(&ap.addr, ap.port));
node->ipv6_preferred ? "IPv6" : "IPv4",
fmt_addrport(&ap.addr, ap.port),
options->ClientPreferIPv6ORPort == -1 ?
"the configured Bridge address" :
"ClientPreferIPv6ORPort");
}
}
if (node->rs) {

309
src/or/nodelist.c
View File

@ -224,7 +224,6 @@ nodelist_set_consensus(networkstatus_t *ns)
{
const or_options_t *options = get_options();
int authdir = authdir_mode_v3(options);
int client = !server_mode(options);
init_nodelist();
if (ns->flavor == FLAV_MICRODESC)
@ -261,7 +260,7 @@ nodelist_set_consensus(networkstatus_t *ns)
node->is_bad_exit = rs->is_bad_exit;
node->is_hs_dir = rs->is_hs_dir;
node->ipv6_preferred = 0;
if (client && options->ClientPreferIPv6ORPort == 1 &&
if (fascist_firewall_prefer_ipv6_orport(options) &&
(tor_addr_is_null(&rs->ipv6_addr) == 0 ||
(node->md && tor_addr_is_null(&node->md->ipv6_addr) == 0)))
node->ipv6_preferred = 1;
@ -761,6 +760,40 @@ node_exit_policy_is_exact(const node_t *node, sa_family_t family)
return 1;
}
/* Check if the "addr" and port_field fields from r are a valid non-listening
* address/port. If so, set valid to true and add a newly allocated
* tor_addr_port_t containing "addr" and port_field to sl.
* "addr" is an IPv4 host-order address and port_field is a uint16_t.
* r is typically a routerinfo_t or routerstatus_t.
*/
#define SL_ADD_NEW_IPV4_AP(r, port_field, sl, valid) \
STMT_BEGIN \
if (tor_addr_port_is_valid_ipv4h((r)->addr, (r)->port_field, 0)) { \
valid = 1; \
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t)); \
tor_addr_from_ipv4h(&ap->addr, (r)->addr); \
ap->port = (r)->port_field; \
smartlist_add((sl), ap); \
} \
STMT_END
/* Check if the "addr" and port_field fields from r are a valid non-listening
* address/port. If so, set valid to true and add a newly allocated
* tor_addr_port_t containing "addr" and port_field to sl.
* "addr" is a tor_addr_t and port_field is a uint16_t.
* r is typically a routerinfo_t or routerstatus_t.
*/
#define SL_ADD_NEW_IPV6_AP(r, port_field, sl, valid) \
STMT_BEGIN \
if (tor_addr_port_is_valid(&(r)->ipv6_addr, (r)->port_field, 0)) { \
valid = 1; \
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t)); \
tor_addr_copy(&ap->addr, &(r)->ipv6_addr); \
ap->port = (r)->port_field; \
smartlist_add((sl), ap); \
} \
STMT_END
/** Return list of tor_addr_port_t with all OR ports (in the sense IP
* addr + TCP port) for <b>node</b>. Caller must free all elements
* using tor_free() and free the list using smartlist_free().
@ -773,30 +806,38 @@ smartlist_t *
node_get_all_orports(const node_t *node)
{
smartlist_t *sl = smartlist_new();
int valid = 0;
/* Find a valid IPv4 address and port */
if (node->ri != NULL) {
if (node->ri->addr != 0) {
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t));
tor_addr_from_ipv4h(&ap->addr, node->ri->addr);
ap->port = node->ri->or_port;
smartlist_add(sl, ap);
}
if (!tor_addr_is_null(&node->ri->ipv6_addr)) {
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t));
tor_addr_copy(&ap->addr, &node->ri->ipv6_addr);
ap->port = node->ri->or_port;
smartlist_add(sl, ap);
}
} else if (node->rs != NULL) {
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t));
tor_addr_from_ipv4h(&ap->addr, node->rs->addr);
ap->port = node->rs->or_port;
smartlist_add(sl, ap);
SL_ADD_NEW_IPV4_AP(node->ri, or_port, sl, valid);
}
/* If we didn't find a valid address/port in the ri, try the rs */
if (!valid && node->rs != NULL) {
SL_ADD_NEW_IPV4_AP(node->rs, or_port, sl, valid);
}
/* Find a valid IPv6 address and port */
valid = 0;
if (node->ri != NULL) {
SL_ADD_NEW_IPV6_AP(node->ri, ipv6_orport, sl, valid);
}
if (!valid && node->rs != NULL) {
SL_ADD_NEW_IPV6_AP(node->rs, ipv6_orport, sl, valid);
}
if (!valid && node->md != NULL) {
SL_ADD_NEW_IPV6_AP(node->md, ipv6_orport, sl, valid);
}
return sl;
}
#undef SL_ADD_NEW_IPV4_AP
#undef SL_ADD_NEW_IPV6_AP
/** Wrapper around node_get_prim_orport for backward
compatibility. */
void
@ -812,9 +853,13 @@ node_get_addr(const node_t *node, tor_addr_t *addr_out)
uint32_t
node_get_prim_addr_ipv4h(const node_t *node)
{
if (node->ri) {
/* Don't check the ORPort or DirPort, as this function isn't port-specific,
* and the node might have a valid IPv4 address, yet have a zero
* ORPort or DirPort.
*/
if (node->ri && tor_addr_is_valid_ipv4h(node->ri->addr, 0)) {
return node->ri->addr;
} else if (node->rs) {
} else if (node->rs && tor_addr_is_valid_ipv4h(node->rs->addr, 0)) {
return node->rs->addr;
}
return 0;
@ -825,13 +870,13 @@ node_get_prim_addr_ipv4h(const node_t *node)
void
node_get_address_string(const node_t *node, char *buf, size_t len)
{
if (node->ri) {
strlcpy(buf, fmt_addr32(node->ri->addr), len);
} else if (node->rs) {
uint32_t ipv4_addr = node_get_prim_addr_ipv4h(node);
if (tor_addr_is_valid_ipv4h(ipv4_addr, 0)) {
tor_addr_t addr;
tor_addr_from_ipv4h(&addr, node->rs->addr);
tor_addr_from_ipv4h(&addr, ipv4_addr);
tor_addr_to_str(buf, &addr, len, 0);
} else {
} else if (len > 0) {
buf[0] = '\0';
}
}
@ -890,30 +935,80 @@ node_get_declared_family(const node_t *node)
return NULL;
}
/* Does this node have a valid IPv6 address?
* Prefer node_has_ipv6_orport() or node_has_ipv6_dirport() for
* checking specific ports. */
int
node_has_ipv6_addr(const node_t *node)
{
/* Don't check the ORPort or DirPort, as this function isn't port-specific,
* and the node might have a valid IPv6 address, yet have a zero
* ORPort or DirPort.
*/
if (node->ri && tor_addr_is_valid(&node->ri->ipv6_addr, 0))
return 1;
if (node->rs && tor_addr_is_valid(&node->rs->ipv6_addr, 0))
return 1;
if (node->md && tor_addr_is_valid(&node->md->ipv6_addr, 0))
return 1;
return 0;
}
/* Does this node have a valid IPv6 ORPort? */
int
node_has_ipv6_orport(const node_t *node)
{
tor_addr_port_t ipv6_orport;
node_get_pref_ipv6_orport(node, &ipv6_orport);
return tor_addr_port_is_valid_ap(&ipv6_orport, 0);
}
/* Does this node have a valid IPv6 DirPort? */
int
node_has_ipv6_dirport(const node_t *node)
{
tor_addr_port_t ipv6_dirport;
node_get_pref_ipv6_dirport(node, &ipv6_dirport);
return tor_addr_port_is_valid_ap(&ipv6_dirport, 0);
}
/** Return 1 if we prefer the IPv6 address and OR TCP port of
* <b>node</b>, else 0.
*
* We prefer the IPv6 address if the router has an IPv6 address and
* We prefer the IPv6 address if the router has an IPv6 address,
* and we can use IPv6 addresses, and:
* i) the node_t says that it prefers IPv6
* or
* ii) the router has no IPv4 address. */
* ii) the router has no IPv4 OR address.
*/
int
node_ipv6_preferred(const node_t *node)
node_ipv6_or_preferred(const node_t *node)
{
const or_options_t *options = get_options();
tor_addr_port_t ipv4_addr;
node_assert_ok(node);
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);
/* XX/teor - node->ipv6_preferred is set from
* fascist_firewall_prefer_ipv6_orport() each time the consensus is loaded.
*/
if (!fascist_firewall_use_ipv6(options)) {
return 0;
} else if (node->ipv6_preferred || node_get_prim_orport(node, &ipv4_addr)) {
return node_has_ipv6_orport(node);
}
return 0;
}
#define RETURN_IPV4_AP(r, port_field, ap_out) \
STMT_BEGIN \
if (r && tor_addr_port_is_valid_ipv4h((r)->addr, (r)->port_field, 0)) { \
tor_addr_from_ipv4h(&(ap_out)->addr, (r)->addr); \
(ap_out)->port = (r)->port_field; \
return 0; \
} \
STMT_END
/** Copy the primary (IPv4) OR port (IP address and TCP port) for
* <b>node</b> into *<b>ap_out</b>. Return 0 if a valid address and
* port was copied, else return non-zero.*/
@ -923,20 +1018,10 @@ 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;
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_IPV4_AP(node->ri, or_port, ap_out);
RETURN_IPV4_AP(node->rs, or_port, ap_out);
/* Microdescriptors only have an IPv6 address */
return -1;
}
@ -945,21 +1030,12 @@ 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)
{
const or_options_t *options = get_options();
tor_assert(ap_out);
/* Cheap implementation of config option ClientUseIPv6 -- simply
don't prefer IPv6 when ClientUseIPv6 is not set and we're not a
client running with bridges. 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 ((options->ClientUseIPv6 || options->UseBridges) &&
node_ipv6_preferred(node)) {
if (node_ipv6_or_preferred(node)) {
node_get_pref_ipv6_orport(node, ap_out);
} else {
/* the primary ORPort is always on IPv4 */
node_get_prim_orport(node, ap_out);
}
}
@ -972,20 +1048,113 @@ 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 */
/* Prefer routerstatus over microdesc for consistency with the
* fascist_firewall_* functions. Also check if the address or port are valid,
* and try another alternative if they are not. */
if (node->ri) {
if (node->ri && tor_addr_port_is_valid(&node->ri->ipv6_addr,
node->ri->ipv6_orport, 0)) {
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) {
} else if (node->rs && tor_addr_port_is_valid(&node->rs->ipv6_addr,
node->rs->ipv6_orport, 0)) {
tor_addr_copy(&ap_out->addr, &node->rs->ipv6_addr);
ap_out->port = node->rs->ipv6_orport;
} else if (node->md && tor_addr_port_is_valid(&node->md->ipv6_addr,
node->md->ipv6_orport, 0)) {
tor_addr_copy(&ap_out->addr, &node->md->ipv6_addr);
ap_out->port = node->md->ipv6_orport;
} else {
tor_addr_make_null(&ap_out->addr, AF_INET6);
ap_out->port = 0;
}
}
/** Return 1 if we prefer the IPv6 address and Dir TCP port of
* <b>node</b>, else 0.
*
* We prefer the IPv6 address if the router has an IPv6 address,
* and we can use IPv6 addresses, and:
* i) the router has no IPv4 Dir address.
* or
* ii) our preference is for IPv6 Dir addresses.
*/
int
node_ipv6_dir_preferred(const node_t *node)
{
const or_options_t *options = get_options();
tor_addr_port_t ipv4_addr;
node_assert_ok(node);
/* node->ipv6_preferred is set from fascist_firewall_prefer_ipv6_orport(),
* so we can't use it to determine DirPort IPv6 preference.
* This means that bridge clients will use IPv4 DirPorts by default.
*/
if (!fascist_firewall_use_ipv6(options)) {
return 0;
} else if (node_get_prim_dirport(node, &ipv4_addr)
|| fascist_firewall_prefer_ipv6_dirport(get_options())) {
return node_has_ipv6_dirport(node);
}
return 0;
}
/** Copy the primary (IPv4) Dir port (IP address and TCP port) for
* <b>node</b> into *<b>ap_out</b>. Return 0 if a valid address and
* port was copied, else return non-zero.*/
int
node_get_prim_dirport(const node_t *node, tor_addr_port_t *ap_out)
{
node_assert_ok(node);
tor_assert(ap_out);
RETURN_IPV4_AP(node->ri, dir_port, ap_out);
RETURN_IPV4_AP(node->rs, dir_port, ap_out);
/* Microdescriptors only have an IPv6 address */
return -1;
}
#undef RETURN_IPV4_AP
/** Copy the preferred Dir port (IP address and TCP port) for
* <b>node</b> into *<b>ap_out</b>. */
void
node_get_pref_dirport(const node_t *node, tor_addr_port_t *ap_out)
{
tor_assert(ap_out);
if (node_ipv6_dir_preferred(node)) {
node_get_pref_ipv6_dirport(node, ap_out);
} else {
/* the primary DirPort is always on IPv4 */
node_get_prim_dirport(node, ap_out);
}
}
/** Copy the preferred IPv6 Dir port (IP address and TCP port) for
* <b>node</b> into *<b>ap_out</b>. */
void
node_get_pref_ipv6_dirport(const node_t *node, tor_addr_port_t *ap_out)
{
node_assert_ok(node);
tor_assert(ap_out);
/* Check if the address or port are valid, and try another alternative if
* they are not. Note that microdescriptors have no dir_port. */
/* Assume IPv4 and IPv6 dirports are the same */
if (node->ri && tor_addr_port_is_valid(&node->ri->ipv6_addr,
node->ri->dir_port, 0)) {
tor_addr_copy(&ap_out->addr, &node->ri->ipv6_addr);
ap_out->port = node->ri->dir_port;
} else if (node->rs && tor_addr_port_is_valid(&node->rs->ipv6_addr,
node->rs->dir_port, 0)) {
tor_addr_copy(&ap_out->addr, &node->rs->ipv6_addr);
ap_out->port = node->rs->dir_port;
} else {
tor_addr_make_null(&ap_out->addr, AF_INET6);
ap_out->port = 0;
}
}

12
src/or/nodelist.h
View File

@ -55,10 +55,20 @@ 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);
int node_has_ipv6_addr(const node_t *node);
int node_has_ipv6_orport(const node_t *node);
int node_has_ipv6_dirport(const node_t *node);
/* Deprecated - use node_ipv6_or_preferred or node_ipv6_dir_preferred */
#define node_ipv6_preferred(node) node_ipv6_or_preferred(node)
int node_ipv6_or_preferred(const node_t *node);
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);
int node_ipv6_dir_preferred(const node_t *node);
int node_get_prim_dirport(const node_t *node, tor_addr_port_t *ap_out);
void node_get_pref_dirport(const node_t *node, tor_addr_port_t *ap_out);
void node_get_pref_ipv6_dirport(const node_t *node, tor_addr_port_t *ap_out);
int node_has_curve25519_onion_key(const node_t *node);
MOCK_DECL(smartlist_t *, nodelist_get_list, (void));

29
src/or/or.h
View File

@ -2414,7 +2414,8 @@ typedef struct node_t {
/* Local info: derived. */
/** True if the IPv6 OR port is preferred over the IPv4 OR port. */
/** True if the IPv6 OR port is preferred over the IPv4 OR port.
* XX/teor - can this become out of date if the torrc changes? */
unsigned int ipv6_preferred:1;
/** According to the geoip db what country is this router in? */
@ -4081,12 +4082,24 @@ 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. */
/** If true, clients may connect over IPv4. If false, they will avoid
* connecting over IPv4. We enforce this for OR and Dir connections. */
int ClientUseIPv4;
/** If true, clients may connect over IPv6. If false, they will avoid
* connecting over IPv4. We enforce this for OR and Dir connections.
* Use fascist_firewall_use_ipv6() instead of accessing this value
* directly. */
int ClientUseIPv6;
/** If true, prefer an IPv6 OR port over an IPv4 one. */
/** If true, prefer an IPv6 OR port over an IPv4 one for entry node
* connections. If auto, bridge clients prefer IPv6, and other clients
* prefer IPv4. Use fascist_firewall_prefer_ipv6_orport() instead of accessing
* this value directly. */
int ClientPreferIPv6ORPort;
/** If true, prefer an IPv6 directory port over an IPv4 one for direct
* directory connections. If auto, bridge clients prefer IPv6, and other
* clients prefer IPv4. Use fascist_firewall_prefer_ipv6_dirport() instead of
* accessing this value directly. */
int ClientPreferIPv6DirPort;
/** The length of time that we think a consensus should be fresh. */
int V3AuthVotingInterval;
@ -5145,6 +5158,8 @@ typedef struct dir_server_t {
char *description;
char *nickname;
char *address; /**< Hostname. */
/* XX/teor - why do we duplicate the address and port fields here and in
* fake_status? Surely we could just use fake_status (#17867). */
tor_addr_t ipv6_addr; /**< IPv6 address if present; AF_UNSPEC if not */
uint32_t addr; /**< IPv4 address. */
uint16_t dir_port; /**< Directory port. */
@ -5230,7 +5245,9 @@ typedef enum {
CRN_ALLOW_INVALID = 1<<3,
/* XXXX not used, apparently. */
CRN_WEIGHT_AS_EXIT = 1<<5,
CRN_NEED_DESC = 1<<6
CRN_NEED_DESC = 1<<6,
/* On clients, only provide nodes that satisfy ClientPreferIPv6OR */
CRN_PREF_ADDR = 1<<7
} router_crn_flags_t;
/** Return value for router_add_to_routerlist() and dirserv_add_descriptor() */

701
src/or/policies.c
View File

@ -13,6 +13,7 @@
#include "or.h"
#include "config.h"
#include "dirserv.h"
#include "networkstatus.h"
#include "nodelist.h"
#include "policies.h"
#include "router.h"
@ -270,16 +271,76 @@ parse_reachable_addresses(void)
"Error parsing ReachableDirAddresses entry; ignoring.");
ret = -1;
}
/* We ignore ReachableAddresses for relays */
if (!server_mode(options)) {
if ((reachable_or_addr_policy
&& policy_is_reject_star(reachable_or_addr_policy, AF_UNSPEC))
|| (reachable_dir_addr_policy
&& policy_is_reject_star(reachable_dir_addr_policy, AF_UNSPEC))) {
log_warn(LD_CONFIG, "Tor cannot connect to the Internet if "
"ReachableAddresses, ReachableORAddresses, or "
"ReachableDirAddresses reject all addresses. Please accept "
"some addresses in these options.");
} else if (options->ClientUseIPv4 == 1
&& ((reachable_or_addr_policy
&& policy_is_reject_star(reachable_or_addr_policy, AF_INET))
|| (reachable_dir_addr_policy
&& policy_is_reject_star(reachable_dir_addr_policy, AF_INET)))) {
log_warn(LD_CONFIG, "You have set ClientUseIPv4 1, but "
"ReachableAddresses, ReachableORAddresses, or "
"ReachableDirAddresses reject all IPv4 addresses. "
"Tor will not connect using IPv4.");
} else if (fascist_firewall_use_ipv6(options)
&& ((reachable_or_addr_policy
&& policy_is_reject_star(reachable_or_addr_policy, AF_INET6))
|| (reachable_dir_addr_policy
&& policy_is_reject_star(reachable_dir_addr_policy, AF_INET6)))) {
log_warn(LD_CONFIG, "You have configured tor to use IPv6 "
"(ClientUseIPv6 1 or UseBridges 1), but "
"ReachableAddresses, ReachableORAddresses, or "
"ReachableDirAddresses reject all IPv6 addresses. "
"Tor will not connect using IPv6.");
}
}
return ret;
}
/** Return true iff the firewall options might block any address:port
* combination.
/* Return true iff ClientUseIPv4 0 or ClientUseIPv6 0 might block any OR or Dir
* address:port combination. */
static int
firewall_is_fascist_impl(void)
{
const or_options_t *options = get_options();
/* Assume every non-bridge relay has an IPv4 address.
* Clients which use bridges may only know the IPv6 address of their
* bridge. */
return (options->ClientUseIPv4 == 0
|| (!fascist_firewall_use_ipv6(options)
&& options->UseBridges == 1));
}
/** Return true iff the firewall options, including ClientUseIPv4 0 and
* ClientUseIPv6 0, might block any OR address:port combination.
* Address preferences may still change which address is selected even if
* this function returns false.
*/
int
firewall_is_fascist_or(void)
{
return reachable_or_addr_policy != NULL;
return (reachable_or_addr_policy != NULL || firewall_is_fascist_impl());
}
/** Return true iff the firewall options, including ClientUseIPv4 0 and
* ClientUseIPv6 0, might block any Dir address:port combination.
* Address preferences may still change which address is selected even if
* this function returns false.
*/
int
firewall_is_fascist_dir(void)
{
return (reachable_dir_addr_policy != NULL || firewall_is_fascist_impl());
}
/** Return true iff <b>policy</b> (possibly NULL) will allow a
@ -317,49 +378,625 @@ addr_policy_permits_address(uint32_t addr, uint16_t port,
return addr_policy_permits_tor_addr(&a, port, policy);
}
/** Return true iff we think our firewall will let us make an OR connection to
* addr:port. */
int
fascist_firewall_allows_address_or(const tor_addr_t *addr, uint16_t port)
/** Return true iff we think our firewall will let us make a connection to
* addr:port.
*
* If we are configured as a server, ignore any address family preference and
* just use IPv4.
* Otherwise:
* - return false for all IPv4 addresses:
* - if ClientUseIPv4 is 0, or
* if pref_only and pref_ipv6 are both true;
* - return false for all IPv6 addresses:
* - if fascist_firewall_use_ipv6() is 0, or
* - if pref_only is true and pref_ipv6 is false.
*
* Return false if addr is NULL or tor_addr_is_null(), or if port is 0. */
STATIC int
fascist_firewall_allows_address(const tor_addr_t *addr,
uint16_t port,
smartlist_t *firewall_policy,
int pref_only, int pref_ipv6)
{
const or_options_t *options = get_options();
if (!addr || tor_addr_is_null(addr) || !port) {
return 0;
}
if (!server_mode(options)) {
if (tor_addr_family(addr) == AF_INET &&
(!options->ClientUseIPv4 || (pref_only && pref_ipv6)))
return 0;
/* Bridges can always use IPv6 */
if (tor_addr_family(addr) == AF_INET6 &&
(!fascist_firewall_use_ipv6(options) || (pref_only && !pref_ipv6)))
return 0;
}
return addr_policy_permits_tor_addr(addr, port,
reachable_or_addr_policy);
firewall_policy);
}
/** Return true iff we think our firewall will let us make an OR connection to
* <b>ri</b>. */
int
fascist_firewall_allows_or(const routerinfo_t *ri)
/** Is this client configured to use IPv6?
*/
int fascist_firewall_use_ipv6(const or_options_t *options)
{
/* XXXX proposal 118 */
tor_addr_t addr;
tor_addr_from_ipv4h(&addr, ri->addr);
return fascist_firewall_allows_address_or(&addr, ri->or_port);
/* Clients use IPv6 if it's set, or they use bridges, or they don't use
* IPv4 */
return (options->ClientUseIPv6 == 1 || options->UseBridges == 1
|| options->ClientUseIPv4 == 0);
}
/** Return true iff we think our firewall will let us make an OR connection to
* <b>node</b>. */
int
fascist_firewall_allows_node(const node_t *node)
/** Do we prefer to connect to IPv6, ignoring ClientPreferIPv6ORPort and
* ClientPreferIPv6DirPort?
* If we're unsure, return -1, otherwise, return 1 for IPv6 and 0 for IPv4.
*/
static int
fascist_firewall_prefer_ipv6_impl(const or_options_t *options)
{
if (node->ri) {
return fascist_firewall_allows_or(node->ri);
} else if (node->rs) {
tor_addr_t addr;
tor_addr_from_ipv4h(&addr, node->rs->addr);
return fascist_firewall_allows_address_or(&addr, node->rs->or_port);
} else {
/*
Cheap implementation of config options ClientUseIPv4 & ClientUseIPv6 --
If we're a server or IPv6 is disabled, use IPv4.
If IPv4 is disabled, use IPv6.
*/
if (server_mode(options) || !fascist_firewall_use_ipv6(options)) {
return 0;
}
if (!options->ClientUseIPv4) {
return 1;
}
return -1;
}
/** Do we prefer to connect to IPv6 ORPorts?
*/
int
fascist_firewall_prefer_ipv6_orport(const or_options_t *options)
{
/* node->ipv6_preferred is set from fascist_firewall_prefer_ipv6_orport()
* each time the consensus is loaded.
* If our preferences change, we will only reset ipv6_preferred on the node
* when the next consensus is loaded. But the consensus is realoded when the
* configuration changes after a HUP. So as long as the result of this
* function only depends on Tor's options, everything should work ok.
*/
int pref_ipv6 = fascist_firewall_prefer_ipv6_impl(options);
if (pref_ipv6 >= 0) {
return pref_ipv6;
}
/* We can use both IPv4 and IPv6 - which do we prefer? */
if (options->ClientPreferIPv6ORPort == 1) {
return 1;
}
return 0;
}
/** Do we prefer to connect to IPv6 DirPorts?
*/
int
fascist_firewall_prefer_ipv6_dirport(const or_options_t *options)
{
int pref_ipv6 = fascist_firewall_prefer_ipv6_impl(options);
if (pref_ipv6 >= 0) {
return pref_ipv6;
}
/* We can use both IPv4 and IPv6 - which do we prefer? */
if (options->ClientPreferIPv6DirPort == 1) {
return 1;
}
return 0;
}
/** Return true iff we think our firewall will let us make a connection to
* addr:port. Uses ReachableORAddresses or ReachableDirAddresses based on
* fw_connection.
* If pref_only, return false if addr is not in the client's preferred address
* family.
*/
int
fascist_firewall_allows_address_addr(const tor_addr_t *addr, uint16_t port,
firewall_connection_t fw_connection,
int pref_only)
{
const or_options_t *options = get_options();
if (fw_connection == FIREWALL_OR_CONNECTION) {
return fascist_firewall_allows_address(addr, port,
reachable_or_addr_policy,
pref_only,
fascist_firewall_prefer_ipv6_orport(options));
} else if (fw_connection == FIREWALL_DIR_CONNECTION) {
return fascist_firewall_allows_address(addr, port,
reachable_dir_addr_policy,
pref_only,
fascist_firewall_prefer_ipv6_dirport(options));
} else {
log_warn(LD_BUG, "Bad firewall_connection_t value %d.",
fw_connection);
return 0;
}
}
/** Return true iff we think our firewall will let us make a directory
* connection to addr:port. */
/** Return true iff we think our firewall will let us make a connection to
* addr:port (ap). Uses ReachableORAddresses or ReachableDirAddresses based on
* fw_connection.
* If pref_only, return false if addr is not in the client's preferred address
* family.
*/
int
fascist_firewall_allows_address_dir(const tor_addr_t *addr, uint16_t port)
fascist_firewall_allows_address_ap(const tor_addr_port_t *ap,
firewall_connection_t fw_connection,
int pref_only)
{
return addr_policy_permits_tor_addr(addr, port,
reachable_dir_addr_policy);
tor_assert(ap);
return fascist_firewall_allows_address_addr(&ap->addr, ap->port,
fw_connection, pref_only);
}
/* Return true iff we think our firewall will let us make a connection to
* ipv4h_or_addr:ipv4_or_port. ipv4h_or_addr is interpreted in host order.
* Uses ReachableORAddresses or ReachableDirAddresses based on
* fw_connection.
* If pref_only, return false if addr is not in the client's preferred address
* family. */
int
fascist_firewall_allows_address_ipv4h(uint32_t ipv4h_or_addr,
uint16_t ipv4_or_port,
firewall_connection_t fw_connection,
int pref_only)
{
tor_addr_t ipv4_or_addr;
tor_addr_from_ipv4h(&ipv4_or_addr, ipv4h_or_addr);
return fascist_firewall_allows_address_addr(&ipv4_or_addr, ipv4_or_port,
fw_connection, pref_only);
}
/** Return true iff we think our firewall will let us make a connection to
* ipv4h_addr/ipv6_addr. Uses ipv4_orport/ipv6_orport/ReachableORAddresses or
* ipv4_dirport/ipv6_dirport/ReachableDirAddresses based on IPv4/IPv6 and
* <b>fw_connection</b>.
* If pref_only, return false if addr is not in the client's preferred address
* family. */
static int
fascist_firewall_allows_base(uint32_t ipv4h_addr, uint16_t ipv4_orport,
uint16_t ipv4_dirport,
const tor_addr_t *ipv6_addr, uint16_t ipv6_orport,
uint16_t ipv6_dirport,
firewall_connection_t fw_connection,
int pref_only)
{
if (fascist_firewall_allows_address_ipv4h(ipv4h_addr,
(fw_connection == FIREWALL_OR_CONNECTION
? ipv4_orport
: ipv4_dirport),
fw_connection,
pref_only)) {
return 1;
}
if (fascist_firewall_allows_address_addr(ipv6_addr,
(fw_connection == FIREWALL_OR_CONNECTION
? ipv6_orport
: ipv6_dirport),
fw_connection,
pref_only)) {
return 1;
}
return 0;
}
/** Like fascist_firewall_allows_ri, but doesn't consult the node. */
static int
fascist_firewall_allows_ri_impl(const routerinfo_t *ri,
firewall_connection_t fw_connection,
int pref_only)
{
if (!ri) {
return 0;
}
/* Assume IPv4 and IPv6 DirPorts are the same */
return fascist_firewall_allows_base(ri->addr, ri->or_port, ri->dir_port,
&ri->ipv6_addr, ri->ipv6_orport,
ri->dir_port, fw_connection, pref_only);
}
/** Like fascist_firewall_allows_rs, but doesn't consult the node. */
static int
fascist_firewall_allows_rs_impl(const routerstatus_t *rs,
firewall_connection_t fw_connection,
int pref_only)
{
if (!rs) {
return 0;
}
/* Assume IPv4 and IPv6 DirPorts are the same */
return fascist_firewall_allows_base(rs->addr, rs->or_port, rs->dir_port,
&rs->ipv6_addr, rs->ipv6_orport,
rs->dir_port, fw_connection, pref_only);
}
/** Return true iff we think our firewall will let us make a connection to
* <b>rs</b> on either its IPv4 or IPv6 address. Uses
* or_port/ipv6_orport/ReachableORAddresses or dir_port/ReachableDirAddresses
* based on IPv4/IPv6 and <b>fw_connection</b>.
* If pref_only, return false if addr is not in the client's preferred address
* family.
* Consults the corresponding node if the addresses in rs are not permitted. */
int
fascist_firewall_allows_rs(const routerstatus_t *rs,
firewall_connection_t fw_connection, int pref_only)
{
if (!rs) {
return 0;
}
/* Assume IPv4 and IPv6 DirPorts are the same */
if (fascist_firewall_allows_rs_impl(rs, fw_connection, pref_only)) {
return 1;
} else {
const node_t *node = node_get_by_id(rs->identity_digest);
return fascist_firewall_allows_node(node, fw_connection, pref_only);
}
}
/** Like fascist_firewall_allows_md, but doesn't consult the node. */
static int
fascist_firewall_allows_md_impl(const microdesc_t *md,
firewall_connection_t fw_connection,
int pref_only)
{
if (!md) {
return 0;
}
/* Can't check dirport, it doesn't have one */
if (fw_connection == FIREWALL_DIR_CONNECTION) {
return 0;
}
/* Also can't check IPv4, doesn't have that either */
return fascist_firewall_allows_address_addr(&md->ipv6_addr, md->ipv6_orport,
fw_connection, pref_only);
}
/** Return true iff we think our firewall will let us make a connection to
* <b>node</b>:
* - if <b>preferred</b> is true, on its preferred address,
* - if not, on either its IPv4 or IPv6 address.
* Uses or_port/ipv6_orport/ReachableORAddresses or
* dir_port/ReachableDirAddresses based on IPv4/IPv6 and <b>fw_connection</b>.
* If pref_only, return false if addr is not in the client's preferred address
* family. */
int
fascist_firewall_allows_node(const node_t *node,
firewall_connection_t fw_connection,
int pref_only)
{
if (!node) {
return 0;
}
node_assert_ok(node);
/* Sometimes, the rs is missing the IPv6 address info, and we need to go
* all the way to the md */
if (node->ri && fascist_firewall_allows_ri_impl(node->ri, fw_connection,
pref_only)) {
return 1;
} else if (node->rs && fascist_firewall_allows_rs_impl(node->rs,
fw_connection,
pref_only)) {
return 1;
} else if (node->md && fascist_firewall_allows_md_impl(node->md,
fw_connection,
pref_only)) {
return 1;
} else {
/* If we know nothing, assume it's unreachable, we'll never get an address
* to connect to. */
return 0;
}
}
/** Return true iff we think our firewall will let us make a connection to
* <b>ds</b> on either its IPv4 or IPv6 address. Uses ReachableORAddresses or
* ReachableDirAddresses based on <b>fw_connection</b> (some directory
* connections are tunneled over ORPorts).
* If pref_only, return false if addr is not in the client's preferred address
* family. */
int
fascist_firewall_allows_dir_server(const dir_server_t *ds,
firewall_connection_t fw_connection,
int pref_only)
{
if (!ds) {
return 0;
}
/* 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_allows_rs looking up the node on
* failure, because it will get the latest info for the relay. */
return fascist_firewall_allows_rs(&ds->fake_status, fw_connection,
pref_only);
}
/** If a and b are both valid and allowed by fw_connection,
* choose one based on want_a and return it.
* Otherwise, return whichever is allowed.
* Otherwise, return NULL.
* If pref_only, only return an address if it's in the client's preferred
* address family. */
static const tor_addr_port_t *
fascist_firewall_choose_address_impl(const tor_addr_port_t *a,
const tor_addr_port_t *b,
int want_a,
firewall_connection_t fw_connection,
int pref_only)
{
const tor_addr_port_t *use_a = NULL;
const tor_addr_port_t *use_b = NULL;
if (fascist_firewall_allows_address_ap(a, fw_connection, pref_only)) {
use_a = a;
}
if (fascist_firewall_allows_address_ap(b, fw_connection, pref_only)) {
use_b = b;
}
/* If both are allowed */
if (use_a && use_b) {
/* Choose a if we want it */
return (want_a ? use_a : use_b);
} else {
/* Choose a if we have it */
return (use_a ? use_a : use_b);
}
}
/** If a and b are both valid and preferred by fw_connection,
* choose one based on want_a and return it.
* Otherwise, return whichever is preferred.
* If neither are preferred, and pref_only is false:
* - If a and b are both allowed by fw_connection,
* choose one based on want_a and return it.
* - Otherwise, return whichever is preferred.
* Otherwise, return NULL. */
const tor_addr_port_t *
fascist_firewall_choose_address(const tor_addr_port_t *a,
const tor_addr_port_t *b,
int want_a,
firewall_connection_t fw_connection,
int pref_only)
{
const tor_addr_port_t *pref = fascist_firewall_choose_address_impl(
a, b, want_a,
fw_connection,
1);
if (pref_only || pref) {
/* If there is a preferred address, use it. If we can only use preferred
* addresses, and neither address is preferred, pref will be NULL, and we
* want to return NULL, so return it. */
return pref;
} else {
/* If there's no preferred address, and we can return addresses that are
* not preferred, use an address that's allowed */
return fascist_firewall_choose_address_impl(a, b, want_a, fw_connection,
0);
}
}
/** Copy an address and port into <b>ap</b> that we think our firewall will
* let us connect to. Uses ipv4_addr/ipv6_addr and
* ipv4_orport/ipv6_orport/ReachableORAddresses or
* ipv4_dirport/ipv6_dirport/ReachableDirAddresses based on IPv4/IPv6 and
* <b>fw_connection</b>.
* If pref_only, only choose preferred addresses. In either case, choose
* a preferred address before an address that's not preferred.
* If neither address is chosen, return 0, else return 1. */
static int
fascist_firewall_choose_address_base(const tor_addr_t *ipv4_addr,
uint16_t ipv4_orport,
uint16_t ipv4_dirport,
const tor_addr_t *ipv6_addr,
uint16_t ipv6_orport,
uint16_t ipv6_dirport,
firewall_connection_t fw_connection,
int pref_only,
tor_addr_port_t* ap)
{
const tor_addr_port_t *result = NULL;
/* This argument is ignored as long as the address pair is IPv4/IPv6,
* because we always have a preference in a client.
* For bridge clients, this selects the preferred address, which was
* previously IPv6 (if a bridge has both), so we keep that behaviour. */
const int bridge_client_prefer_ipv4 = 0;
tor_assert(ipv6_addr);
tor_assert(ap);
tor_addr_port_t ipv4_ap;
tor_addr_copy(&ipv4_ap.addr, ipv4_addr);
ipv4_ap.port = (fw_connection == FIREWALL_OR_CONNECTION
? ipv4_orport
: ipv4_dirport);
tor_addr_port_t ipv6_ap;
tor_addr_copy(&ipv6_ap.addr, ipv6_addr);
ipv6_ap.port = (fw_connection == FIREWALL_OR_CONNECTION
? ipv6_orport
: ipv6_dirport);
result = fascist_firewall_choose_address(&ipv4_ap, &ipv6_ap,
bridge_client_prefer_ipv4,
fw_connection, pref_only);
if (result) {
tor_addr_copy(&ap->addr, &result->addr);
ap->port = result->port;
return 1;
} else {
return 0;
}
}
/** Like fascist_firewall_choose_address_base, but takes a host-order IPv4
* address as the first parameter. */
static int
fascist_firewall_choose_address_ipv4h(uint32_t ipv4h_addr,
uint16_t ipv4_orport,
uint16_t ipv4_dirport,
const tor_addr_t *ipv6_addr,
uint16_t ipv6_orport,
uint16_t ipv6_dirport,
firewall_connection_t fw_connection,
int pref_only,
tor_addr_port_t* ap)
{
tor_addr_t ipv4_addr;
tor_addr_from_ipv4h(&ipv4_addr, ipv4h_addr);
return fascist_firewall_choose_address_base(&ipv4_addr, ipv4_orport,
ipv4_dirport, ipv6_addr,
ipv6_orport, ipv6_dirport,
fw_connection, pref_only, ap);
}
#define IPV6_OR_LOOKUP(r, identity_digest, ipv6_or_ap) \
STMT_BEGIN \
if (!(r)->ipv6_orport || tor_addr_is_null(&(r)->ipv6_addr)) { \
const node_t *node = node_get_by_id((identity_digest)); \
if (node) { \
node_get_pref_ipv6_orport(node, &(ipv6_or_ap)); \
} else { \
tor_addr_make_null(&(ipv6_or_ap).addr, AF_INET6); \
(ipv6_or_ap).port = 0; \
} \
} else { \
tor_addr_copy(&(ipv6_or_ap).addr, &(r)->ipv6_addr); \
(ipv6_or_ap).port = (r)->ipv6_orport; \
} \
STMT_END
/** Copy an address and port from <b>rs</b> into <b>ap</b> that we think our
* firewall will let us connect to. Uses ipv4h_addr/ipv6_addr and
* ipv4_orport/ipv6_orport/ReachableORAddresses or
* ipv4_dirport/ipv6_dirport/ReachableDirAddresses based on IPv4/IPv6 and
* <b>fw_connection</b>.
* If pref_only, only choose preferred addresses. In either case, choose
* a preferred address before an address that's not preferred.
* If neither address is chosen, return 0, else return 1.
* Consults the corresponding node if the addresses in rs are not valid. */
int
fascist_firewall_choose_address_rs(const routerstatus_t *rs,
firewall_connection_t fw_connection,
int pref_only, tor_addr_port_t* ap)
{
if (!rs) {
return 0;
}
tor_assert(ap);
/* Don't do the lookup if the IPv6 address/port in rs is OK.
* If it's OK, assume the dir_port is also OK. */
tor_addr_port_t ipv6_or_ap;
IPV6_OR_LOOKUP(rs, rs->identity_digest, ipv6_or_ap);
/* Assume IPv4 and IPv6 DirPorts are the same.
* Assume the IPv6 OR and Dir addresses are the same. */
return fascist_firewall_choose_address_ipv4h(rs->addr,
rs->or_port,
rs->dir_port,
&ipv6_or_ap.addr,
ipv6_or_ap.port,
rs->dir_port,
fw_connection,
pref_only,
ap);
}
/** Copy an address and port from <b>node</b> into <b>ap</b> that we think our
* firewall will let us connect to. Uses ipv4h_addr/ipv6_addr and
* ipv4_orport/ipv6_orport/ReachableORAddresses or
* ipv4_dirport/ipv6_dirport/ReachableDirAddresses based on IPv4/IPv6 and
* <b>fw_connection</b>.
* If pref_only, only choose preferred addresses. In either case, choose
* a preferred address before an address that's not preferred.
* If neither address is chosen, return 0, else return 1. */
int
fascist_firewall_choose_address_node(const node_t *node,
firewall_connection_t fw_connection,
int pref_only, tor_addr_port_t *ap)
{
if (!node) {
return 0;
}
node_assert_ok(node);
tor_addr_port_t ipv4_or_ap;
node_get_prim_orport(node, &ipv4_or_ap);
tor_addr_port_t ipv4_dir_ap;
node_get_prim_dirport(node, &ipv4_dir_ap);
tor_addr_port_t ipv6_or_ap;
node_get_pref_ipv6_orport(node, &ipv6_or_ap);
tor_addr_port_t ipv6_dir_ap;
node_get_pref_ipv6_dirport(node, &ipv6_dir_ap);
/* Assume the IPv6 OR and Dir addresses are the same. */
return fascist_firewall_choose_address_base(&ipv4_or_ap.addr,
ipv4_or_ap.port,
ipv4_dir_ap.port,
&ipv6_or_ap.addr,
ipv6_or_ap.port,
ipv6_dir_ap.port,
fw_connection,
pref_only,
ap);
}
/** Copy an address and port from <b>ds</b> into <b>ap</b> that we think our
* firewall will let us connect to. Uses ipv4h_addr/ipv6_addr and
* ipv4_orport/ipv6_orport/ReachableORAddresses or
* ipv4_dirport/ipv6_dirport/ReachableDirAddresses based on IPv4/IPv6 and
* <b>fw_connection</b>.
* If pref_only, only choose preferred addresses. In either case, choose
* a preferred address before an address that's not preferred.
* If neither address is chosen, return 0, else return 1. */
int
fascist_firewall_choose_address_dir_server(const dir_server_t *ds,
firewall_connection_t fw_connection,
int pref_only, tor_addr_port_t *ap)
{
if (!ds) {
return 0;
}
/* 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
* addresses from the node if it can, because that will get the latest info
* for the relay. */
return fascist_firewall_choose_address_rs(&ds->fake_status, fw_connection,
pref_only, ap);
}
/** Return 1 if <b>addr</b> is permitted to connect to our dir port,

54
src/or/policies.h
View File

@ -22,13 +22,55 @@
#define EXIT_POLICY_REJECT_PRIVATE (1 << 1)
#define EXIT_POLICY_ADD_DEFAULT (1 << 2)
typedef enum firewall_connection_t {
FIREWALL_OR_CONNECTION = 0,
FIREWALL_DIR_CONNECTION = 1
} firewall_connection_t;
typedef int exit_policy_parser_cfg_t;
int firewall_is_fascist_or(void);
int fascist_firewall_allows_address_or(const tor_addr_t *addr, uint16_t port);
int fascist_firewall_allows_or(const routerinfo_t *ri);
int fascist_firewall_allows_node(const node_t *node);
int fascist_firewall_allows_address_dir(const tor_addr_t *addr, uint16_t port);
int firewall_is_fascist_dir(void);
int fascist_firewall_use_ipv6(const or_options_t *options);
int fascist_firewall_prefer_ipv6_orport(const or_options_t *options);
int fascist_firewall_prefer_ipv6_dirport(const or_options_t *options);
int fascist_firewall_allows_address_addr(const tor_addr_t *addr, uint16_t port,
firewall_connection_t fw_connection,
int pref_only);
int fascist_firewall_allows_address_ap(const tor_addr_port_t *ap,
firewall_connection_t fw_connection,
int pref_only);
int fascist_firewall_allows_address_ipv4h(uint32_t ipv4h_or_addr,
uint16_t ipv4_or_port,
firewall_connection_t fw_connection,
int pref_only);
int fascist_firewall_allows_rs(const routerstatus_t *rs,
firewall_connection_t fw_connection,
int pref_only);
int fascist_firewall_allows_node(const node_t *node,
firewall_connection_t fw_connection,
int pref_only);
int fascist_firewall_allows_dir_server(const dir_server_t *ds,
firewall_connection_t fw_connection,
int pref_only);
const tor_addr_port_t * fascist_firewall_choose_address(
const tor_addr_port_t *a,
const tor_addr_port_t *b,
int want_a,
firewall_connection_t fw_connection,
int pref_only);
int fascist_firewall_choose_address_rs(const routerstatus_t *rs,
firewall_connection_t fw_connection,
int pref_only, tor_addr_port_t* ap);
int fascist_firewall_choose_address_node(const node_t *node,
firewall_connection_t fw_connection,
int pref_only, tor_addr_port_t* ap);
int fascist_firewall_choose_address_dir_server(const dir_server_t *ds,
firewall_connection_t fw_connection,
int pref_only, tor_addr_port_t* ap);
int dir_policy_permits_address(const tor_addr_t *addr);
int socks_policy_permits_address(const tor_addr_t *addr);
int authdir_policy_permits_address(uint32_t addr, uint16_t port);
@ -94,6 +136,10 @@ addr_policy_result_t compare_tor_addr_to_short_policy(
#ifdef POLICIES_PRIVATE
STATIC void append_exit_policy_string(smartlist_t **policy, const char *more);
STATIC int fascist_firewall_allows_address(const tor_addr_t *addr,
uint16_t port,
smartlist_t *firewall_policy,
int pref_only, int pref_ipv6);
#endif
#endif

12
src/or/rendclient.c
View File

@ -1367,11 +1367,19 @@ rend_client_get_random_intro_impl(const rend_cache_entry_t *entry,
smartlist_del(usable_nodes, i);
goto again;
}
#ifdef ENABLE_TOR2WEB_MODE
new_extend_info = extend_info_from_node(node, options->Tor2webMode);
#else
new_extend_info = extend_info_from_node(node, 0);
#endif
if (!new_extend_info) {
const char *alternate_reason = "";
#ifdef ENABLE_TOR2WEB_MODE
alternate_reason = ", or we cannot connect directly to it";
#endif
log_info(LD_REND, "We don't have a descriptor for the intro-point relay "
"'%s'; trying another.",
extend_info_describe(intro->extend_info));
"'%s'%s; trying another.",
extend_info_describe(intro->extend_info), alternate_reason);
smartlist_del(usable_nodes, i);
goto again;
} else {

31
src/or/router.c
View File

@ -1293,14 +1293,15 @@ consider_testing_reachability(int test_or, int test_dir)
extend_info_free(ei);
}
/* XXX IPv6 self testing */
tor_addr_from_ipv4h(&addr, me->addr);
if (test_dir && !check_whether_dirport_reachable() &&
!connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, me->dir_port,
DIR_PURPOSE_FETCH_SERVERDESC)) {
/* ask myself, via tor, for my server descriptor. */
directory_initiate_command(&addr,
me->or_port, me->dir_port,
directory_initiate_command(&addr, me->or_port,
&addr, me->dir_port,
me->cache_info.identity_digest,
DIR_PURPOSE_FETCH_SERVERDESC,
ROUTER_PURPOSE_GENERAL,
@ -3413,28 +3414,16 @@ router_free_all(void)
/** Return a smartlist of tor_addr_port_t's with all the OR ports of
<b>ri</b>. Note that freeing of the items in the list as well as
the smartlist itself is the callers responsibility.
XXX duplicating code from node_get_all_orports(). */
the smartlist itself is the callers responsibility. */
smartlist_t *
router_get_all_orports(const routerinfo_t *ri)
{
smartlist_t *sl = smartlist_new();
tor_assert(ri);
if (ri->addr != 0) {
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t));
tor_addr_from_ipv4h(&ap->addr, ri->addr);
ap->port = ri->or_port;
smartlist_add(sl, ap);
}
if (!tor_addr_is_null(&ri->ipv6_addr)) {
tor_addr_port_t *ap = tor_malloc(sizeof(tor_addr_port_t));
tor_addr_copy(&ap->addr, &ri->ipv6_addr);
ap->port = ri->or_port;
smartlist_add(sl, ap);
}
return sl;
node_t fake_node;
memset(&fake_node, 0, sizeof(fake_node));
/* we don't modify ri, fake_node is passed as a const node_t *
*/
fake_node.ri = (routerinfo_t *)ri;
return node_get_all_orports(&fake_node);
}

332
src/or/routerlist.c
View File

@ -13,6 +13,7 @@
#define ROUTERLIST_PRIVATE
#include "or.h"
#include "backtrace.h"
#include "crypto_ed25519.h"
#include "circuitstats.h"
#include "config.h"
@ -1460,9 +1461,190 @@ router_pick_dirserver_generic(smartlist_t *sourcelist,
return router_pick_trusteddirserver_impl(sourcelist, type, flags, NULL);
}
/* Check if we already have a directory fetch from ap, for serverdesc
* (including extrainfo) or microdesc documents.
* If so, return 1, if not, return 0.
* Also returns 0 if addr is NULL, tor_addr_is_null(addr), or dir_port is 0.
*/
STATIC int
router_is_already_dir_fetching(const tor_addr_port_t *ap, int serverdesc,
int microdesc)
{
if (!ap || tor_addr_is_null(&ap->addr) || !ap->port) {
return 0;
}
/* XX/teor - we're not checking tunnel connections here, see #17848
*/
if (serverdesc && (
connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &ap->addr, ap->port, DIR_PURPOSE_FETCH_SERVERDESC)
|| connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &ap->addr, ap->port, DIR_PURPOSE_FETCH_EXTRAINFO))) {
return 1;
}
if (microdesc && (
connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &ap->addr, ap->port, DIR_PURPOSE_FETCH_MICRODESC))) {
return 1;
}
return 0;
}
/* Check if we already have a directory fetch from ds, for serverdesc
* (including extrainfo) or microdesc documents.
* If so, return 1, if not, return 0.
*/
static int
router_is_already_dir_fetching_ds(const dir_server_t *ds,
int serverdesc,
int microdesc)
{
tor_addr_port_t ipv4_dir_ap, ipv6_dir_ap;
/* Assume IPv6 DirPort is the same as IPv4 DirPort */
tor_addr_from_ipv4h(&ipv4_dir_ap.addr, ds->addr);
ipv4_dir_ap.port = ds->dir_port;
tor_addr_copy(&ipv6_dir_ap.addr, &ds->ipv6_addr);
ipv6_dir_ap.port = ds->dir_port;
return (router_is_already_dir_fetching(&ipv4_dir_ap, serverdesc, microdesc)
|| router_is_already_dir_fetching(&ipv6_dir_ap, serverdesc, microdesc));
}
/* Check if we already have a directory fetch from rs, for serverdesc
* (including extrainfo) or microdesc documents.
* If so, return 1, if not, return 0.
*/
static int
router_is_already_dir_fetching_rs(const routerstatus_t *rs,
int serverdesc,
int microdesc)
{
tor_addr_port_t ipv4_dir_ap, ipv6_dir_ap;
/* Assume IPv6 DirPort is the same as IPv4 DirPort */
tor_addr_from_ipv4h(&ipv4_dir_ap.addr, rs->addr);
ipv4_dir_ap.port = rs->dir_port;
tor_addr_copy(&ipv6_dir_ap.addr, &rs->ipv6_addr);
ipv6_dir_ap.port = rs->dir_port;
return (router_is_already_dir_fetching(&ipv4_dir_ap, serverdesc, microdesc)
|| router_is_already_dir_fetching(&ipv6_dir_ap, serverdesc, microdesc));
}
#ifndef LOG_FALSE_POSITIVES_DURING_BOOTSTRAP
#define LOG_FALSE_POSITIVES_DURING_BOOTSTRAP 0
#endif
/* Log a message if rs is not found or not a preferred address */
static void
router_picked_poor_directory_log(const routerstatus_t *rs)
{
const networkstatus_t *usable_consensus;
usable_consensus = networkstatus_get_reasonably_live_consensus(time(NULL),
usable_consensus_flavor());
#if !LOG_FALSE_POSITIVES_DURING_BOOTSTRAP
/* Don't log early in the bootstrap process, it's normal to pick from a
* small pool of nodes. Of course, this won't help if we're trying to
* diagnose bootstrap issues. */
if (!smartlist_len(nodelist_get_list()) || !usable_consensus
|| !router_have_minimum_dir_info()) {
return;
}
#endif
/* We couldn't find a node, or the one we have doesn't fit our preferences.
* This might be a bug. */
if (!rs) {
log_warn(LD_BUG, "Firewall denied all OR and Dir addresses for all relays "
"when searching for a directory.");
log_backtrace(LOG_WARN, LD_BUG, "Node search initiated by");
} else if (!fascist_firewall_allows_rs(rs, FIREWALL_OR_CONNECTION, 1)
&& !fascist_firewall_allows_rs(rs, FIREWALL_DIR_CONNECTION, 1)
) {
log_warn(LD_BUG, "Selected a directory %s with non-preferred OR and Dir "
"addresses for launching a connection: "
"IPv4 %s OR %d Dir %d IPv6 %s OR %d Dir %d",
routerstatus_describe(rs),
fmt_addr32(rs->addr), rs->or_port,
rs->dir_port, fmt_addr(&rs->ipv6_addr),
rs->ipv6_orport, rs->dir_port);
log_backtrace(LOG_WARN, LD_BUG, "Node search initiated by");
}
}
#undef LOG_FALSE_POSITIVES_DURING_BOOTSTRAP
/** How long do we avoid using a directory server after it's given us a 503? */
#define DIR_503_TIMEOUT (60*60)
/* Common retry code for router_pick_directory_server_impl and
* router_pick_trusteddirserver_impl. Retry with the non-preferred IP version.
* Must be called before RETRY_WITHOUT_EXCLUDE().
*
* If we got no result, and we are applying IP preferences, and we are a
* client that could use an alternate IP version, try again with the
* opposite preferences. */
#define RETRY_ALTERNATE_IP_VERSION(retry_label) \
STMT_BEGIN \
if (result == NULL && try_ip_pref && options->ClientUseIPv4 \
&& fascist_firewall_use_ipv6(options) && !server_mode(options) \
&& n_not_preferred && !n_busy) { \
n_excluded = 0; \
n_busy = 0; \
try_ip_pref = 0; \
n_not_preferred = 0; \
goto retry_label; \
} \
STMT_END \
/* Common retry code for router_pick_directory_server_impl and
* router_pick_trusteddirserver_impl. Retry without excluding nodes, but with
* the preferred IP version. Must be called after RETRY_ALTERNATE_IP_VERSION().
*
* If we got no result, and we are excluding nodes, and StrictNodes is
* not set, try again without excluding nodes. */
#define RETRY_WITHOUT_EXCLUDE(retry_label) \
STMT_BEGIN \
if (result == NULL && try_excluding && !options->StrictNodes \
&& n_excluded && !n_busy) { \
try_excluding = 0; \
n_excluded = 0; \
n_busy = 0; \
try_ip_pref = 1; \
n_not_preferred = 0; \
goto retry_label; \
} \
STMT_END
/* When iterating through the routerlist, can OR address/port preference
* and reachability checks be skipped?
*/
static int
router_skip_or_reachability(const or_options_t *options, int try_ip_pref)
{
/* Servers always have and prefer IPv4.
* And if clients are checking against the firewall for reachability only,
* but there's no firewall, don't bother checking */
return server_mode(options) || (!try_ip_pref && !firewall_is_fascist_or());
}
/* When iterating through the routerlist, can Dir address/port preference
* and reachability checks be skipped?
*/
static int
router_skip_dir_reachability(const or_options_t *options, int try_ip_pref)
{
/* Servers always have and prefer IPv4.
* And if clients are checking against the firewall for reachability only,
* but there's no firewall, don't bother checking */
return server_mode(options) || (!try_ip_pref && !firewall_is_fascist_dir());
}
/** Pick a random running valid directory server/mirror from our
* routerlist. Arguments are as for router_pick_directory_server(), except:
*
@ -1487,11 +1669,12 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags,
const int no_microdesc_fetching = (flags & PDS_NO_EXISTING_MICRODESC_FETCH);
const int for_guard = (flags & PDS_FOR_GUARD);
int try_excluding = 1, n_excluded = 0, n_busy = 0;
int try_ip_pref = 1, n_not_preferred = 0;
if (!consensus)
return NULL;
retry_without_exclude:
retry_search:
direct = smartlist_new();
tunnel = smartlist_new();
@ -1500,11 +1683,13 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags,
overloaded_direct = smartlist_new();
overloaded_tunnel = smartlist_new();
const int skip_or = router_skip_or_reachability(options, try_ip_pref);
const int skip_dir = router_skip_dir_reachability(options, try_ip_pref);
/* Find all the running dirservers we know about. */
SMARTLIST_FOREACH_BEGIN(nodelist_get_list(), const node_t *, node) {
int is_trusted, is_trusted_extrainfo;
int is_overloaded;
tor_addr_t addr;
const routerstatus_t *status = node->rs;
const country_t country = node->country;
if (!status)
@ -1535,36 +1720,34 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags,
continue;
}
/* XXXX IP6 proposal 118 */
tor_addr_from_ipv4h(&addr, status->addr);
if (no_serverdesc_fetching && (
connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, status->dir_port, DIR_PURPOSE_FETCH_SERVERDESC)
|| connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, status->dir_port, DIR_PURPOSE_FETCH_EXTRAINFO)
)) {
++n_busy;
continue;
}
if (no_microdesc_fetching && connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, status->dir_port, DIR_PURPOSE_FETCH_MICRODESC)
) {
if (router_is_already_dir_fetching_rs(status,
no_serverdesc_fetching,
no_microdesc_fetching)) {
++n_busy;
continue;
}
is_overloaded = status->last_dir_503_at + DIR_503_TIMEOUT > now;
if ((!fascistfirewall ||
fascist_firewall_allows_address_or(&addr, status->or_port)))
/* Clients use IPv6 addresses if the server has one and the client
* prefers IPv6.
* Add the router if its preferred address and port are reachable.
* If we don't get any routers, we'll try again with the non-preferred
* address for each router (if any). (To ensure correct load-balancing
* we try routers that only have one address both times.)
*/
if (!fascistfirewall || skip_or ||
fascist_firewall_allows_rs(status, FIREWALL_OR_CONNECTION,
try_ip_pref))
smartlist_add(is_trusted ? trusted_tunnel :
is_overloaded ? overloaded_tunnel : tunnel, (void*)node);
else if (!fascistfirewall ||
fascist_firewall_allows_address_dir(&addr, status->dir_port))
else if (skip_dir ||
fascist_firewall_allows_rs(status, FIREWALL_DIR_CONNECTION,
try_ip_pref))
smartlist_add(is_trusted ? trusted_direct :
is_overloaded ? overloaded_direct : direct, (void*)node);
else if (!tor_addr_is_null(&status->ipv6_addr))
++n_not_preferred;
} SMARTLIST_FOREACH_END(node);
if (smartlist_len(tunnel)) {
@ -1593,19 +1776,15 @@ router_pick_directory_server_impl(dirinfo_type_t type, int flags,
smartlist_free(overloaded_direct);
smartlist_free(overloaded_tunnel);
if (result == NULL && try_excluding && !options->StrictNodes && n_excluded
&& !n_busy) {
/* If we got no result, and we are excluding nodes, and StrictNodes is
* not set, try again without excluding nodes. */
try_excluding = 0;
n_excluded = 0;
n_busy = 0;
goto retry_without_exclude;
}
RETRY_ALTERNATE_IP_VERSION(retry_search);
RETRY_WITHOUT_EXCLUDE(retry_search);
if (n_busy_out)
*n_busy_out = n_busy;
router_picked_poor_directory_log(result ? result->rs : NULL);
return result ? result->rs : NULL;
}
@ -1656,22 +1835,25 @@ router_pick_trusteddirserver_impl(const smartlist_t *sourcelist,
smartlist_t *pick_from;
int n_busy = 0;
int try_excluding = 1, n_excluded = 0;
int try_ip_pref = 1, n_not_preferred = 0;
if (!sourcelist)
return NULL;
retry_without_exclude:
retry_search:
direct = smartlist_new();
tunnel = smartlist_new();
overloaded_direct = smartlist_new();
overloaded_tunnel = smartlist_new();
const int skip_or = router_skip_or_reachability(options, try_ip_pref);
const int skip_dir = router_skip_dir_reachability(options, try_ip_pref);
SMARTLIST_FOREACH_BEGIN(sourcelist, const dir_server_t *, d)
{
int is_overloaded =
d->fake_status.last_dir_503_at + DIR_503_TIMEOUT > now;
tor_addr_t addr;
if (!d->is_running) continue;
if ((type & d->type) == 0)
continue;
@ -1687,35 +1869,29 @@ router_pick_trusteddirserver_impl(const smartlist_t *sourcelist,
continue;
}
/* XXXX IP6 proposal 118 */
tor_addr_from_ipv4h(&addr, d->addr);
if (no_serverdesc_fetching) {
if (connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, d->dir_port, DIR_PURPOSE_FETCH_SERVERDESC)
|| connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, d->dir_port, DIR_PURPOSE_FETCH_EXTRAINFO)) {
//log_debug(LD_DIR, "We have an existing connection to fetch "
// "descriptor from %s; delaying",d->description);
++n_busy;
continue;
}
}
if (no_microdesc_fetching) {
if (connection_get_by_type_addr_port_purpose(
CONN_TYPE_DIR, &addr, d->dir_port, DIR_PURPOSE_FETCH_MICRODESC)) {
++n_busy;
continue;
}
if (router_is_already_dir_fetching_ds(d, no_serverdesc_fetching,
no_microdesc_fetching)) {
++n_busy;
continue;
}
if (d->or_port &&
(!fascistfirewall ||
fascist_firewall_allows_address_or(&addr, d->or_port)))
/* Clients use IPv6 addresses if the server has one and the client
* prefers IPv6.
* Add the router if its preferred address and port are reachable.
* If we don't get any routers, we'll try again with the non-preferred
* address for each router (if any). (To ensure correct load-balancing
* we try routers that only have one address both times.)
*/
if (!fascistfirewall || skip_or ||
fascist_firewall_allows_dir_server(d, FIREWALL_OR_CONNECTION,
try_ip_pref))
smartlist_add(is_overloaded ? overloaded_tunnel : tunnel, (void*)d);
else if (!fascistfirewall ||
fascist_firewall_allows_address_dir(&addr, d->dir_port))
else if (skip_dir ||
fascist_firewall_allows_dir_server(d, FIREWALL_DIR_CONNECTION,
try_ip_pref))
smartlist_add(is_overloaded ? overloaded_direct : direct, (void*)d);
else if (!tor_addr_is_null(&d->ipv6_addr))
++n_not_preferred;
}
SMARTLIST_FOREACH_END(d);
@ -1742,19 +1918,14 @@ router_pick_trusteddirserver_impl(const smartlist_t *sourcelist,
smartlist_free(overloaded_direct);
smartlist_free(overloaded_tunnel);
if (result == NULL && try_excluding && !options->StrictNodes && n_excluded
&& !n_busy) {
/* If we got no result, and we are excluding nodes, and StrictNodes is
* not set, try again without excluding nodes. */
try_excluding = 0;
n_excluded = 0;
n_busy = 0;
goto retry_without_exclude;
}
RETRY_ALTERNATE_IP_VERSION(retry_search);
RETRY_WITHOUT_EXCLUDE(retry_search);
router_picked_poor_directory_log(result);
if (n_busy_out)
*n_busy_out = n_busy;
return result;
}
@ -1824,8 +1995,12 @@ routerlist_add_node_and_family(smartlist_t *sl, const routerinfo_t *router)
void
router_add_running_nodes_to_smartlist(smartlist_t *sl, int allow_invalid,
int need_uptime, int need_capacity,
int need_guard, int need_desc)
{ /* XXXX MOVE */
int need_guard, int need_desc,
int pref_addr)
{
const int check_reach = !router_skip_or_reachability(get_options(),
pref_addr);
/* XXXX MOVE */
SMARTLIST_FOREACH_BEGIN(nodelist_get_list(), const node_t *, node) {
if (!node->is_running ||
(!node->is_valid && !allow_invalid))
@ -1836,6 +2011,11 @@ router_add_running_nodes_to_smartlist(smartlist_t *sl, int allow_invalid,
continue;
if (node_is_unreliable(node, need_uptime, need_capacity, need_guard))
continue;
/* Choose a node with an OR address that matches the firewall rules */
if (check_reach && !fascist_firewall_allows_node(node,
FIREWALL_OR_CONNECTION,
pref_addr))
continue;
smartlist_add(sl, (void *)node);
} SMARTLIST_FOREACH_END(node);
@ -2297,6 +2477,10 @@ node_sl_choose_by_bandwidth(const smartlist_t *sl,
* If <b>CRN_NEED_DESC</b> is set in flags, we only consider nodes that
* have a routerinfo or microdescriptor -- that is, enough info to be
* used to build a circuit.
* If <b>CRN_PREF_ADDR</b> is set in flags, we only consider nodes that
* have an address that is preferred by the ClientPreferIPv6ORPort setting
* (regardless of this flag, we exclude nodes that aren't allowed by the
* firewall, including ClientUseIPv4 0 and fascist_firewall_use_ipv6() == 0).
*/
const node_t *
router_choose_random_node(smartlist_t *excludedsmartlist,
@ -2309,6 +2493,7 @@ router_choose_random_node(smartlist_t *excludedsmartlist,
const int allow_invalid = (flags & CRN_ALLOW_INVALID) != 0;
const int weight_for_exit = (flags & CRN_WEIGHT_AS_EXIT) != 0;
const int need_desc = (flags & CRN_NEED_DESC) != 0;
const int pref_addr = (flags & CRN_PREF_ADDR) != 0;
smartlist_t *sl=smartlist_new(),
*excludednodes=smartlist_new();
@ -2334,7 +2519,7 @@ router_choose_random_node(smartlist_t *excludedsmartlist,
router_add_running_nodes_to_smartlist(sl, allow_invalid,
need_uptime, need_capacity,
need_guard, need_desc);
need_guard, need_desc, pref_addr);
log_debug(LD_CIRC,
"We found %d running nodes.",
smartlist_len(sl));
@ -2363,7 +2548,7 @@ router_choose_random_node(smartlist_t *excludedsmartlist,
choice = node_sl_choose_by_bandwidth(sl, rule);
smartlist_free(sl);
if (!choice && (need_uptime || need_capacity || need_guard)) {
if (!choice && (need_uptime || need_capacity || need_guard || pref_addr)) {
/* try once more -- recurse but with fewer restrictions. */
log_info(LD_CIRC,
"We couldn't find any live%s%s%s routers; falling back "
@ -2371,7 +2556,8 @@ router_choose_random_node(smartlist_t *excludedsmartlist,
need_capacity?", fast":"",
need_uptime?", stable":"",
need_guard?", guard":"");
flags &= ~ (CRN_NEED_UPTIME|CRN_NEED_CAPACITY|CRN_NEED_GUARD);
flags &= ~ (CRN_NEED_UPTIME|CRN_NEED_CAPACITY|CRN_NEED_GUARD|
CRN_PREF_ADDR);
choice = router_choose_random_node(
excludedsmartlist, excludedset, flags);
}

5
src/or/routerlist.h
View File

@ -61,7 +61,8 @@ void router_reset_status_download_failures(void);
int routers_have_same_or_addrs(const routerinfo_t *r1, const routerinfo_t *r2);
void router_add_running_nodes_to_smartlist(smartlist_t *sl, int allow_invalid,
int need_uptime, int need_capacity,
int need_guard, int need_desc);
int need_guard, int need_desc,
int pref_addr);
const routerinfo_t *routerlist_find_my_routerinfo(void);
uint32_t router_get_advertised_bandwidth(const routerinfo_t *router);
@ -245,6 +246,8 @@ MOCK_DECL(STATIC was_router_added_t, extrainfo_insert,
MOCK_DECL(STATIC void, initiate_descriptor_downloads,
(const routerstatus_t *source, int purpose, smartlist_t *digests,
int lo, int hi, int pds_flags));
STATIC int router_is_already_dir_fetching(const tor_addr_port_t *ap,
int serverdesc, int microdesc);
#endif

226
src/test/test_entrynodes.c
View File

@ -9,14 +9,16 @@
#include "or.h"
#include "test.h"
#include "config.h"
#include "entrynodes.h"
#include "routerparse.h"
#include "nodelist.h"
#include "util.h"
#include "policies.h"
#include "routerlist.h"
#include "routerparse.h"
#include "routerset.h"
#include "statefile.h"
#include "config.h"
#include "util.h"
#include "test_helpers.h"
@ -70,6 +72,14 @@ fake_network_setup(const struct testcase_t *testcase)
return dummy_state;
}
static or_options_t mocked_options;
static const or_options_t *
mock_get_options(void)
{
return &mocked_options;
}
/** Test choose_random_entry() with none of our routers being guard nodes. */
static void
test_choose_random_entry_no_guards(void *arg)
@ -78,6 +88,14 @@ test_choose_random_entry_no_guards(void *arg)
(void) arg;
MOCK(get_options, mock_get_options);
/* Check that we get a guard if it passes preferred
* address settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = 0;
/* Try to pick an entry even though none of our routers are guards. */
chosen_entry = choose_random_entry(NULL);
@ -86,8 +104,55 @@ test_choose_random_entry_no_guards(void *arg)
can't find a proper entry guard. */
tt_assert(chosen_entry);
/* And with the other IP version active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* And with the preference on auto */
mocked_options.ClientPreferIPv6ORPort = -1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* Check that we don't get a guard if it doesn't pass mandatory address
* settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 0;
mocked_options.ClientPreferIPv6ORPort = 0;
chosen_entry = choose_random_entry(NULL);
/* If we don't allow IPv4 at all, we don't get a guard*/
tt_assert(!chosen_entry);
/* Check that we get a guard if it passes allowed but not preferred address
* settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 1;
mocked_options.ClientPreferIPv6ORPort = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* Check that we get a guard if it passes preferred address settings when
* they're auto */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = -1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
/* And with IPv6 active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
done:
;
memset(&mocked_options, 0, sizeof(mocked_options));
UNMOCK(get_options);
}
/** Test choose_random_entry() with only one of our routers being a
@ -101,17 +166,78 @@ test_choose_random_entry_one_possible_guard(void *arg)
(void) arg;
MOCK(get_options, mock_get_options);
/* Set one of the nodes to be a guard. */
our_nodelist = nodelist_get_list();
the_guard = smartlist_get(our_nodelist, 4); /* chosen by fair dice roll */
the_guard->is_possible_guard = 1;
/* Check that we get the guard if it passes preferred
* address settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = 0;
/* Pick an entry. Make sure we pick the node we marked as guard. */
chosen_entry = choose_random_entry(NULL);
tt_ptr_op(chosen_entry, OP_EQ, the_guard);
/* And with the other IP version active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_ptr_op(chosen_entry, OP_EQ, the_guard);
/* And with the preference on auto */
mocked_options.ClientPreferIPv6ORPort = -1;
chosen_entry = choose_random_entry(NULL);
tt_ptr_op(chosen_entry, OP_EQ, the_guard);
/* Check that we don't get a guard if it doesn't pass mandatory address
* settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 0;
mocked_options.ClientPreferIPv6ORPort = 0;
chosen_entry = choose_random_entry(NULL);
/* If we don't allow IPv4 at all, we don't get a guard*/
tt_assert(!chosen_entry);
/* Check that we get a node if it passes allowed but not preferred
* address settings */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 1;
mocked_options.ClientPreferIPv6ORPort = 1;
chosen_entry = choose_random_entry(NULL);
/* We disable the guard check and the preferred address check at the same
* time, so we can't be sure we get the guard */
tt_assert(chosen_entry);
/* Check that we get a node if it is allowed but not preferred when settings
* are auto */
memset(&mocked_options, 0, sizeof(mocked_options));
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientPreferIPv6ORPort = -1;
chosen_entry = choose_random_entry(NULL);
/* We disable the guard check and the preferred address check at the same
* time, so we can't be sure we get the guard */
tt_assert(chosen_entry);
/* and with IPv6 active */
mocked_options.ClientUseIPv6 = 1;
chosen_entry = choose_random_entry(NULL);
tt_assert(chosen_entry);
done:
;
memset(&mocked_options, 0, sizeof(mocked_options));
UNMOCK(get_options);
}
/** Helper to conduct tests for populate_live_entry_guards().
@ -624,6 +750,93 @@ test_entry_is_live(void *arg)
; /* XXX */
}
#define TEST_IPV4_ADDR "123.45.67.89"
#define TEST_IPV6_ADDR "[1234:5678:90ab:cdef::]"
static void
test_node_preferred_orport(void *arg)
{
(void)arg;
tor_addr_t ipv4_addr;
const uint16_t ipv4_port = 4444;
tor_addr_t ipv6_addr;
const uint16_t ipv6_port = 6666;
routerinfo_t node_ri;
node_t node;
tor_addr_port_t ap;
/* Setup options */
memset(&mocked_options, 0, sizeof(mocked_options));
/* We don't test ClientPreferIPv6ORPort here, because it's used in
* nodelist_set_consensus to setup node.ipv6_preferred, which we set
* directly. */
MOCK(get_options, mock_get_options);
/* Setup IP addresses */
tor_addr_parse(&ipv4_addr, TEST_IPV4_ADDR);
tor_addr_parse(&ipv6_addr, TEST_IPV6_ADDR);
/* Setup node_ri */
memset(&node_ri, 0, sizeof(node_ri));
node_ri.addr = tor_addr_to_ipv4h(&ipv4_addr);
node_ri.or_port = ipv4_port;
tor_addr_copy(&node_ri.ipv6_addr, &ipv6_addr);
node_ri.ipv6_orport = ipv6_port;
/* Setup node */
memset(&node, 0, sizeof(node));
node.ri = &node_ri;
/* Check the preferred address is IPv4 if we're only using IPv4, regardless
* of whether we prefer it or not */
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 0;
node.ipv6_preferred = 0;
node_get_pref_orport(&node, &ap);
tt_assert(tor_addr_eq(&ap.addr, &ipv4_addr));
tt_assert(ap.port == ipv4_port);
node.ipv6_preferred = 1;
node_get_pref_orport(&node, &ap);
tt_assert(tor_addr_eq(&ap.addr, &ipv4_addr));
tt_assert(ap.port == ipv4_port);
/* Check the preferred address is IPv4 if we're using IPv4 and IPv6, but
* don't prefer the IPv6 address */
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 1;
node.ipv6_preferred = 0;
node_get_pref_orport(&node, &ap);
tt_assert(tor_addr_eq(&ap.addr, &ipv4_addr));
tt_assert(ap.port == ipv4_port);
/* Check the preferred address is IPv6 if we prefer it and
* ClientUseIPv6 is 1, regardless of ClientUseIPv4 */
mocked_options.ClientUseIPv4 = 1;
mocked_options.ClientUseIPv6 = 1;
node.ipv6_preferred = 1;
node_get_pref_orport(&node, &ap);
tt_assert(tor_addr_eq(&ap.addr, &ipv6_addr));
tt_assert(ap.port == ipv6_port);
mocked_options.ClientUseIPv4 = 0;
node_get_pref_orport(&node, &ap);
tt_assert(tor_addr_eq(&ap.addr, &ipv6_addr));
tt_assert(ap.port == ipv6_port);
/* Check the preferred address is IPv6 if we don't prefer it, but
* ClientUseIPv4 is 0 */
mocked_options.ClientUseIPv4 = 0;
mocked_options.ClientUseIPv6 = 1;
node.ipv6_preferred = fascist_firewall_prefer_ipv6_orport(&mocked_options);
node_get_pref_orport(&node, &ap);
tt_assert(tor_addr_eq(&ap.addr, &ipv6_addr));
tt_assert(ap.port == ipv6_port);
done:
UNMOCK(get_options);
}
static const struct testcase_setup_t fake_network = {
fake_network_setup, fake_network_cleanup
};
@ -654,6 +867,9 @@ struct testcase_t entrynodes_tests[] = {
{ "entry_is_live",
test_entry_is_live,
TT_FORK, &fake_network, NULL },
{ "node_preferred_orport",
test_node_preferred_orport,
0, NULL, NULL },
END_OF_TESTCASES
};

536
src/test/test_policy.c
View File

@ -1129,6 +1129,538 @@ test_policies_getinfo_helper_policies(void *arg)
#undef TEST_IPV4_ADDR
#undef TEST_IPV6_ADDR
#define TEST_IPV4_ADDR_STR "1.2.3.4"
#define TEST_IPV6_ADDR_STR "[1002::4567]"
#define REJECT_IPv4_FINAL_STR "reject 0.0.0.0/0:*"
#define REJECT_IPv6_FINAL_STR "reject [::]/0:*"
#define OTHER_IPV4_ADDR_STR "6.7.8.9"
#define OTHER_IPV6_ADDR_STR "[afff::]"
/** Run unit tests for fascist_firewall_allows_address */
static void
test_policies_fascist_firewall_allows_address(void *arg)
{
(void)arg;
tor_addr_t ipv4_addr, ipv6_addr, r_ipv4_addr, r_ipv6_addr;
tor_addr_t n_ipv4_addr, n_ipv6_addr;
const uint16_t port = 1234;
smartlist_t *policy = NULL;
smartlist_t *e_policy = NULL;
addr_policy_t *item = NULL;
int malformed_list = 0;
/* Setup the options and the items in the policies */
memset(&mock_options, 0, sizeof(or_options_t));
MOCK(get_options, mock_get_options);
policy = smartlist_new();
item = router_parse_addr_policy_item_from_string("accept "
TEST_IPV4_ADDR_STR ":*",
ADDR_POLICY_ACCEPT,
&malformed_list);
tt_assert(item);
tt_assert(!malformed_list);
smartlist_add(policy, item);
item = router_parse_addr_policy_item_from_string("accept "
TEST_IPV6_ADDR_STR,
ADDR_POLICY_ACCEPT,
&malformed_list);
tt_assert(item);
tt_assert(!malformed_list);
smartlist_add(policy, item);
/* Normally, policy_expand_unspec would do this for us */
item = router_parse_addr_policy_item_from_string(REJECT_IPv4_FINAL_STR,
ADDR_POLICY_ACCEPT,
&malformed_list);
tt_assert(item);
tt_assert(!malformed_list);
smartlist_add(policy, item);
item = router_parse_addr_policy_item_from_string(REJECT_IPv6_FINAL_STR,
ADDR_POLICY_ACCEPT,
&malformed_list);
tt_assert(item);
tt_assert(!malformed_list);
smartlist_add(policy, item);
item = NULL;
e_policy = smartlist_new();
/*
char *polstr = policy_dump_to_string(policy, 1, 1);
printf("%s\n", polstr);
tor_free(polstr);
*/
/* Parse the addresses */
tor_addr_parse(&ipv4_addr, TEST_IPV4_ADDR_STR);
tor_addr_parse(&ipv6_addr, TEST_IPV6_ADDR_STR);
tor_addr_parse(&r_ipv4_addr, OTHER_IPV4_ADDR_STR);
tor_addr_parse(&r_ipv6_addr, OTHER_IPV6_ADDR_STR);
tor_addr_make_null(&n_ipv4_addr, AF_INET);
tor_addr_make_null(&n_ipv6_addr, AF_INET6);
/* Test the function's address matching with IPv4 and IPv6 on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 0, 0)
== 0);
/* Preferring IPv4 */
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 1, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 1, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 1, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 1, 0)
== 0);
/* Preferring IPv6 */
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 1, 1)
== 0);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 1, 1)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 1, 1)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 1, 1)
== 0);
/* Test the function's address matching with UseBridges on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 1;
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 0, 0)
== 0);
/* Preferring IPv4 */
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 1, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 1, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 1, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 1, 0)
== 0);
/* Preferring IPv6 */
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 1, 1)
== 0);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 1, 1)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 1, 1)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 1, 1)
== 0);
/* bridge clients always use IPv6, regardless of ClientUseIPv6 */
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 0;
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 0, 0)
== 0);
/* Test the function's address matching with IPv4 on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 0;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 0, 0)
== 0);
/* Test the function's address matching with IPv6 on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 0;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 0, 0)
== 0);
/* Test the function's address matching with ClientUseIPv4 0.
* This means "use IPv6" regardless of the other settings. */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 0;
mock_options.ClientUseIPv6 = 0;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&r_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&r_ipv6_addr, port, policy, 0, 0)
== 0);
/* Test the function's address matching for unusual inputs */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 1;
/* NULL and tor_addr_is_null addresses are rejected */
tt_assert(fascist_firewall_allows_address(NULL, port, policy, 0, 0) == 0);
tt_assert(fascist_firewall_allows_address(&n_ipv4_addr, port, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&n_ipv6_addr, port, policy, 0, 0)
== 0);
/* zero ports are rejected */
tt_assert(fascist_firewall_allows_address(&ipv4_addr, 0, policy, 0, 0)
== 0);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, 0, policy, 0, 0)
== 0);
/* NULL and empty policies accept everything */
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, NULL, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, NULL, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv4_addr, port, e_policy, 0, 0)
== 1);
tt_assert(fascist_firewall_allows_address(&ipv6_addr, port, e_policy, 0, 0)
== 1);
done:
addr_policy_free(item);
addr_policy_list_free(policy);
addr_policy_list_free(e_policy);
UNMOCK(get_options);
}
#undef REJECT_IPv4_FINAL_STR
#undef REJECT_IPv6_FINAL_STR
#undef OTHER_IPV4_ADDR_STR
#undef OTHER_IPV6_ADDR_STR
#define TEST_IPV4_OR_PORT 1234
#define TEST_IPV4_DIR_PORT 2345
#define TEST_IPV6_OR_PORT 61234
#define TEST_IPV6_DIR_PORT 62345
/** Run unit tests for fascist_firewall_choose_address */
static void
test_policies_fascist_firewall_choose_address(void *arg)
{
(void)arg;
tor_addr_port_t ipv4_or_ap, ipv4_dir_ap, ipv6_or_ap, ipv6_dir_ap;
tor_addr_port_t n_ipv4_ap, n_ipv6_ap;
/* Setup the options */
memset(&mock_options, 0, sizeof(or_options_t));
MOCK(get_options, mock_get_options);
/* Parse the addresses */
tor_addr_parse(&ipv4_or_ap.addr, TEST_IPV4_ADDR_STR);
ipv4_or_ap.port = TEST_IPV4_OR_PORT;
tor_addr_parse(&ipv4_dir_ap.addr, TEST_IPV4_ADDR_STR);
ipv4_dir_ap.port = TEST_IPV4_DIR_PORT;
tor_addr_parse(&ipv6_or_ap.addr, TEST_IPV6_ADDR_STR);
ipv6_or_ap.port = TEST_IPV6_OR_PORT;
tor_addr_parse(&ipv6_dir_ap.addr, TEST_IPV6_ADDR_STR);
ipv6_dir_ap.port = TEST_IPV6_DIR_PORT;
tor_addr_make_null(&n_ipv4_ap.addr, AF_INET);
n_ipv4_ap.port = 0;
tor_addr_make_null(&n_ipv6_ap.addr, AF_INET6);
n_ipv6_ap.port = 0;
/* Choose an address with IPv4 and IPv6 on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 0;
/* Preferring IPv4 */
mock_options.ClientPreferIPv6ORPort = 0;
mock_options.ClientPreferIPv6DirPort = 0;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Auto (Preferring IPv4) */
mock_options.ClientPreferIPv6ORPort = -1;
mock_options.ClientPreferIPv6DirPort = -1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Preferring IPv6 */
mock_options.ClientPreferIPv6ORPort = 1;
mock_options.ClientPreferIPv6DirPort = 1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv6_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv6_dir_ap);
/* Preferring IPv4 OR / IPv6 Dir */
mock_options.ClientPreferIPv6ORPort = 0;
mock_options.ClientPreferIPv6DirPort = 1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv6_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv6_dir_ap);
/* Preferring IPv6 OR / IPv4 Dir */
mock_options.ClientPreferIPv6ORPort = 1;
mock_options.ClientPreferIPv6DirPort = 0;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Choose an address with UseBridges on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.UseBridges = 1;
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 1;
/* Preferring IPv4 */
mock_options.ClientPreferIPv6ORPort = 0;
mock_options.ClientPreferIPv6DirPort = 0;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Auto:
* - bridge clients prefer the configured bridge OR address,
* - other clients prefer IPv4 OR by default,
* - all clients prefer IPv4 Dir by default.
*/
mock_options.ClientPreferIPv6ORPort = -1;
mock_options.ClientPreferIPv6DirPort = -1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Preferring IPv6 */
mock_options.ClientPreferIPv6ORPort = 1;
mock_options.ClientPreferIPv6DirPort = 1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv6_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv6_dir_ap);
/* In the default configuration (Auto / IPv6 off), bridge clients should
* still use IPv6, and only prefer it for bridges configured with an IPv6
* address, regardless of ClientUseIPv6. */
mock_options.ClientUseIPv6 = 0;
mock_options.ClientPreferIPv6ORPort = -1;
mock_options.ClientPreferIPv6DirPort = -1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Choose an address with IPv4 on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 0;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv4_dir_ap);
/* Choose an address with IPv6 on */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 0;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv6_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv6_dir_ap);
/* Choose an address with ClientUseIPv4 0.
* This means "use IPv6" regardless of the other settings. */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 0;
mock_options.ClientUseIPv6 = 0;
mock_options.UseBridges = 0;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 1)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv6_dir_ap);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 1)
== &ipv6_dir_ap);
/* Choose from unusual inputs */
memset(&mock_options, 0, sizeof(or_options_t));
mock_options.ClientUseIPv4 = 1;
mock_options.ClientUseIPv6 = 1;
mock_options.UseBridges = 1;
tt_assert(fascist_firewall_choose_address(&ipv4_or_ap, &n_ipv6_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv4_or_ap);
tt_assert(fascist_firewall_choose_address(&n_ipv4_ap, &ipv6_or_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== &ipv6_or_ap);
tt_assert(fascist_firewall_choose_address(&n_ipv4_ap, &n_ipv6_ap, 0,
FIREWALL_OR_CONNECTION, 0)
== NULL);
tt_assert(fascist_firewall_choose_address(&ipv4_dir_ap, &n_ipv6_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv4_dir_ap);
tt_assert(fascist_firewall_choose_address(&n_ipv4_ap, &ipv6_dir_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== &ipv6_dir_ap);
tt_assert(fascist_firewall_choose_address(&n_ipv4_ap, &n_ipv6_ap, 0,
FIREWALL_DIR_CONNECTION, 0)
== NULL);
done:
UNMOCK(get_options);
}
#undef TEST_IPV4_ADDR_STR
#undef TEST_IPV6_ADDR_STR
#undef TEST_IPV4_OR_PORT
#undef TEST_IPV4_DIR_PORT
#undef TEST_IPV6_OR_PORT
#undef TEST_IPV6_DIR_PORT
struct testcase_t policy_tests[] = {
{ "router_dump_exit_policy_to_string", test_dump_exit_policy_to_string, 0,
NULL, NULL },
@ -1139,6 +1671,10 @@ struct testcase_t policy_tests[] = {
{ "reject_interface_address", test_policies_reject_interface_address, 0,
NULL, NULL },
{ "reject_port_address", test_policies_reject_port_address, 0, NULL, NULL },
{ "fascist_firewall_allows_address",
test_policies_fascist_firewall_allows_address, 0, NULL, NULL },
{ "fascist_firewall_choose_address",
test_policies_fascist_firewall_choose_address, 0, NULL, NULL },
END_OF_TESTCASES
};

73
src/test/test_routerlist.c
View File

@ -11,6 +11,7 @@
#define TOR_UNIT_TESTING
#include "or.h"
#include "config.h"
#include "connection.h"
#include "container.h"
#include "directory.h"
#include "dirvote.h"
@ -371,6 +372,77 @@ test_router_pick_directory_server_impl(void *arg)
policies_free_all();
}
connection_t *mocked_connection = NULL;
/* Mock connection_get_by_type_addr_port_purpose by returning
* mocked_connection. */
static connection_t *
mock_connection_get_by_type_addr_port_purpose(int type,
const tor_addr_t *addr,
uint16_t port, int purpose)
{
(void)type;
(void)addr;
(void)port;
(void)purpose;
return mocked_connection;
}
#define TEST_ADDR_STR "127.0.0.1"
#define TEST_DIR_PORT 12345
static void
test_routerlist_router_is_already_dir_fetching(void *arg)
{
(void)arg;
tor_addr_port_t test_ap, null_addr_ap, zero_port_ap;
/* Setup */
tor_addr_parse(&test_ap.addr, TEST_ADDR_STR);
test_ap.port = TEST_DIR_PORT;
tor_addr_make_null(&null_addr_ap.addr, AF_INET6);
null_addr_ap.port = TEST_DIR_PORT;
tor_addr_parse(&zero_port_ap.addr, TEST_ADDR_STR);
zero_port_ap.port = 0;
MOCK(connection_get_by_type_addr_port_purpose,
mock_connection_get_by_type_addr_port_purpose);
/* Test that we never get 1 from a NULL connection */
mocked_connection = NULL;
tt_assert(router_is_already_dir_fetching(&test_ap, 1, 1) == 0);
tt_assert(router_is_already_dir_fetching(&test_ap, 1, 0) == 0);
tt_assert(router_is_already_dir_fetching(&test_ap, 0, 1) == 0);
/* We always expect 0 in these cases */
tt_assert(router_is_already_dir_fetching(&test_ap, 0, 0) == 0);
tt_assert(router_is_already_dir_fetching(NULL, 1, 1) == 0);
tt_assert(router_is_already_dir_fetching(&null_addr_ap, 1, 1) == 0);
tt_assert(router_is_already_dir_fetching(&zero_port_ap, 1, 1) == 0);
/* Test that we get 1 with a connection in the appropriate circumstances */
mocked_connection = connection_new(CONN_TYPE_DIR, AF_INET);
tt_assert(router_is_already_dir_fetching(&test_ap, 1, 1) == 1);
tt_assert(router_is_already_dir_fetching(&test_ap, 1, 0) == 1);
tt_assert(router_is_already_dir_fetching(&test_ap, 0, 1) == 1);
/* Test that we get 0 even with a connection in the appropriate
* circumstances */
tt_assert(router_is_already_dir_fetching(&test_ap, 0, 0) == 0);
tt_assert(router_is_already_dir_fetching(NULL, 1, 1) == 0);
tt_assert(router_is_already_dir_fetching(&null_addr_ap, 1, 1) == 0);
tt_assert(router_is_already_dir_fetching(&zero_port_ap, 1, 1) == 0);
done:
/* If a connection is never set up, connection_free chokes on it. */
buf_free(mocked_connection->inbuf);
buf_free(mocked_connection->outbuf);
tor_free(mocked_connection);
UNMOCK(connection_get_by_type_addr_port_purpose);
}
#undef TEST_ADDR_STR
#undef TEST_DIR_PORT
#define NODE(name, flags) \
{ #name, test_routerlist_##name, (flags), NULL, NULL }
#define ROUTER(name,flags) \
@ -379,6 +451,7 @@ test_router_pick_directory_server_impl(void *arg)
struct testcase_t routerlist_tests[] = {
NODE(initiate_descriptor_downloads, 0),
NODE(launch_descriptor_downloads, 0),
NODE(router_is_already_dir_fetching, TT_FORK),
ROUTER(pick_directory_server_impl, TT_FORK),
END_OF_TESTCASES
};