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Merge branch 'bug7555_v2_squashed' 

Conflicts:
	src/or/connection_edge.c
This commit is contained in:
Nick Mathewson 2015-01-19 11:43:41 -05:00
parent 63765399eb 758d77130c
commit 1053af0b9c
11 changed files with 1174 additions and 155 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
changes/bug14193 Normal file
View File

@ -0,0 +1,4 @@
o Minor bugfixes (client DNS):
- Report the correct cached DNS expiration times. Previously, we
would report everything as "never expires." Fixes bug 14193;
bugfix on 0.2.3.17-beta.

6
changes/bug14259 Normal file
View File

@ -0,0 +1,6 @@
o Minor bugfixes (client):
- Avoid a small memory leak when we find a cached answer for a reverse
DNS lookup in a client-side DNS cache. (Remember, client-side DNS
caching is off by default, and is not recommended.) Fixes bug 14259;
bugfix on 0.2.0.1-alpha.

5
changes/bug7555 Normal file
View File

@ -0,0 +1,5 @@
o Major bugfixes (client):
- Allow MapAddress and AutomapHostsOnResolve to work together when an
address is mapped into another address type that must be
automapped at resolve time. Fixes bug 7555; bugfix on
0.2.0.1-alpha.

42
src/or/addressmap.c
View File

@ -390,13 +390,35 @@ addressmap_rewrite(char *address, size_t maxlen,
goto done;
}
if (ent && ent->source == ADDRMAPSRC_DNS) {
sa_family_t f;
tor_addr_t tmp;
f = tor_addr_parse(&tmp, ent->new_address);
if (f == AF_INET && !(flags & AMR_FLAG_USE_IPV4_DNS))
goto done;
else if (f == AF_INET6 && !(flags & AMR_FLAG_USE_IPV6_DNS))
switch (ent->source) {
case ADDRMAPSRC_DNS:
{
sa_family_t f;
tor_addr_t tmp;
f = tor_addr_parse(&tmp, ent->new_address);
if (f == AF_INET && !(flags & AMR_FLAG_USE_IPV4_DNS))
goto done;
else if (f == AF_INET6 && !(flags & AMR_FLAG_USE_IPV6_DNS))
goto done;
}
break;
case ADDRMAPSRC_CONTROLLER:
case ADDRMAPSRC_TORRC:
if (!(flags & AMR_FLAG_USE_MAPADDRESS))
goto done;
break;
case ADDRMAPSRC_AUTOMAP:
if (!(flags & AMR_FLAG_USE_AUTOMAP))
goto done;
break;
case ADDRMAPSRC_TRACKEXIT:
if (!(flags & AMR_FLAG_USE_TRACKEXIT))
goto done;
break;
case ADDRMAPSRC_NONE:
default:
log_warn(LD_BUG, "Unknown addrmap source value %d. Ignoring it.",
(int) ent->source);
goto done;
}
@ -431,7 +453,7 @@ addressmap_rewrite(char *address, size_t maxlen,
if (exit_source_out)
*exit_source_out = exit_source;
if (expires_out)
*expires_out = TIME_MAX;
*expires_out = expires;
return (rewrites > 0);
}
@ -455,6 +477,8 @@ addressmap_rewrite_reverse(char *address, size_t maxlen, unsigned flags,
return 0;
else if (f == AF_INET6 && !(flags & AMR_FLAG_USE_IPV6_DNS))
return 0;
/* FFFF we should reverse-map virtual addresses even if we haven't
* enabled DNS cacheing. */
}
tor_asprintf(&s, "REVERSE[%s]", address);
@ -981,6 +1005,8 @@ addressmap_register_virtual_address(int type, char *new_address)
strmap_set(virtaddress_reversemap, new_address, vent);
addressmap_register(*addrp, new_address, 2, ADDRMAPSRC_AUTOMAP, 0, 0);
/* FFFF register corresponding reverse mapping. */
#if 0
{
/* Try to catch possible bugs */

7
src/or/addressmap.h
View File

@ -16,8 +16,11 @@ void addressmap_clean(time_t now);
void addressmap_clear_configured(void);
void addressmap_clear_transient(void);
void addressmap_free_all(void);
#define AMR_FLAG_USE_IPV4_DNS (1u<<0)
#define AMR_FLAG_USE_IPV6_DNS (1u<<1)
#define AMR_FLAG_USE_IPV4_DNS (1u<<0)
#define AMR_FLAG_USE_IPV6_DNS (1u<<1)
#define AMR_FLAG_USE_MAPADDRESS (1u<<2)
#define AMR_FLAG_USE_AUTOMAP (1u<<3)
#define AMR_FLAG_USE_TRACKEXIT (1u<<4)
int addressmap_rewrite(char *address, size_t maxlen, unsigned flags,
time_t *expires_out,
addressmap_entry_source_t *exit_source_out);

464
src/or/connection_edge.c
View File

@ -908,6 +908,199 @@ connection_ap_rewrite_and_attach_if_allowed(entry_connection_t *conn,
return connection_ap_handshake_rewrite_and_attach(conn, circ, cpath);
}
/* Try to perform any map-based rewriting of the target address in
* <b>conn</b>, filling in the fields of <b>out</b> as we go, and modifying
* conn->socks_request.address as appropriate.
*/
STATIC void
connection_ap_handshake_rewrite(entry_connection_t *conn,
rewrite_result_t *out)
{
socks_request_t *socks = conn->socks_request;
const or_options_t *options = get_options();
tor_addr_t addr_tmp;
/* Initialize all the fields of 'out' to reasonable defaults */
out->automap = 0;
out->exit_source = ADDRMAPSRC_NONE;
out->map_expires = TIME_MAX;
out->end_reason = 0;
out->should_close = 0;
out->orig_address[0] = 0;
/* We convert all incoming addresses to lowercase. */
tor_strlower(socks->address);
/* Remember the original address. */
strlcpy(out->orig_address, socks->address, sizeof(out->orig_address));
log_debug(LD_APP,"Client asked for %s:%d",
safe_str_client(socks->address),
socks->port);
/* Check for whether this is a .exit address. By default, those are
* disallowed when they're coming straight from the client, but you're
* allowed to have them in MapAddress commands and so forth. */
if (!strcmpend(socks->address, ".exit") && !options->AllowDotExit) {
log_warn(LD_APP, "The \".exit\" notation is disabled in Tor due to "
"security risks. Set AllowDotExit in your torrc to enable "
"it (at your own risk).");
control_event_client_status(LOG_WARN, "SOCKS_BAD_HOSTNAME HOSTNAME=%s",
escaped(socks->address));
out->end_reason = END_STREAM_REASON_TORPROTOCOL;
out->should_close = 1;
return;
}
/* Remember the original address so we can tell the user about what
* they actually said, not just what it turned into. */
if (! conn->original_dest_address) {
/* Is the 'if' necessary here? XXXX */
conn->original_dest_address = tor_strdup(conn->socks_request->address);
}
/* First, apply MapAddress and MAPADDRESS mappings. We need to do
* these only for non-reverse lookups, since they don't exist for those.
* We need to do this before we consider automapping, since we might
* e.g. resolve irc.oftc.net into irconionaddress.onion, at which point
* we'd need to automap it. */
if (socks->command != SOCKS_COMMAND_RESOLVE_PTR) {
const unsigned rewrite_flags = AMR_FLAG_USE_MAPADDRESS;
if (addressmap_rewrite(socks->address, sizeof(socks->address),
rewrite_flags, &out->map_expires, &out->exit_source)) {
control_event_stream_status(conn, STREAM_EVENT_REMAP,
REMAP_STREAM_SOURCE_CACHE);
}
}
/* Now, handle automapping. Automapping happens when we're asked to
* resolve a hostname, and AutomapHostsOnResolve is set, and
* the hostname has a suffix listed in AutomapHostsSuffixes.
*/
if (socks->command == SOCKS_COMMAND_RESOLVE &&
tor_addr_parse(&addr_tmp, socks->address)<0 &&
options->AutomapHostsOnResolve) {
/* Check the suffix... */
out->automap = addressmap_address_should_automap(socks->address, options);
if (out->automap) {
/* If we get here, then we should apply an automapping for this. */
const char *new_addr;
/* We return an IPv4 address by default, or an IPv6 address if we
* are allowed to do so. */
int addr_type = RESOLVED_TYPE_IPV4;
if (conn->socks_request->socks_version != 4) {
if (!conn->entry_cfg.ipv4_traffic ||
(conn->entry_cfg.ipv6_traffic && conn->entry_cfg.prefer_ipv6) ||
conn->entry_cfg.prefer_ipv6_virtaddr)
addr_type = RESOLVED_TYPE_IPV6;
}
/* Okay, register the target address as automapped, and find the new
* address we're supposed to give as a resolve answer. (Return a cached
* value if we've looked up this address before.
*/
new_addr = addressmap_register_virtual_address(
addr_type, tor_strdup(socks->address));
if (! new_addr) {
log_warn(LD_APP, "Unable to automap address %s",
escaped_safe_str(socks->address));
out->end_reason = END_STREAM_REASON_INTERNAL;
out->should_close = 1;
return;
}
log_info(LD_APP, "Automapping %s to %s",
escaped_safe_str_client(socks->address),
safe_str_client(new_addr));
strlcpy(socks->address, new_addr, sizeof(socks->address));
}
}
/* Now handle reverse lookups, if they're in the cache. This doesn't
* happen too often, since client-side DNS caching is off by default. */
if (socks->command == SOCKS_COMMAND_RESOLVE_PTR) {
unsigned rewrite_flags = 0;
if (conn->entry_cfg.use_cached_ipv4_answers)
rewrite_flags |= AMR_FLAG_USE_IPV4_DNS;
if (conn->entry_cfg.use_cached_ipv6_answers)
rewrite_flags |= AMR_FLAG_USE_IPV6_DNS;
if (addressmap_rewrite_reverse(socks->address, sizeof(socks->address),
rewrite_flags, &out->map_expires)) {
char *result = tor_strdup(socks->address);
/* remember _what_ is supposed to have been resolved. */
tor_snprintf(socks->address, sizeof(socks->address), "REVERSE[%s]",
out->orig_address);
connection_ap_handshake_socks_resolved(conn, RESOLVED_TYPE_HOSTNAME,
strlen(result), (uint8_t*)result,
-1,
out->map_expires);
tor_free(result);
out->end_reason = END_STREAM_REASON_DONE |
END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED;
out->should_close = 1;
return;
}
/* Hang on, did we find an answer saying that this is a reverse lookup for
* an internal address? If so, we should reject it if we're condigured to
* do so. */
if (options->ClientDNSRejectInternalAddresses) {
/* Don't let people try to do a reverse lookup on 10.0.0.1. */
tor_addr_t addr;
int ok;
ok = tor_addr_parse_PTR_name(
&addr, socks->address, AF_UNSPEC, 1);
if (ok == 1 && tor_addr_is_internal(&addr, 0)) {
connection_ap_handshake_socks_resolved(conn, RESOLVED_TYPE_ERROR,
0, NULL, -1, TIME_MAX);
out->end_reason = END_STREAM_REASON_SOCKSPROTOCOL |
END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED;
out->should_close = 1;
return;
}
}
}
/* If we didn't automap it before, then this is still the address
* that came straight from the user, mapped according to any
* MapAddress/MAPADDRESS commands. Now other mappings, including
* previously registered Automap entries, TrackHostExits entries,
* and client-side DNS cache entries (not recommended).
*/
if (!socks->command != SOCKS_COMMAND_RESOLVE_PTR &&
!out->automap) {
unsigned rewrite_flags = AMR_FLAG_USE_AUTOMAP | AMR_FLAG_USE_TRACKEXIT;
addressmap_entry_source_t exit_source2;
if (conn->entry_cfg.use_cached_ipv4_answers)
rewrite_flags |= AMR_FLAG_USE_IPV4_DNS;
if (conn->entry_cfg.use_cached_ipv6_answers)
rewrite_flags |= AMR_FLAG_USE_IPV6_DNS;
if (addressmap_rewrite(socks->address, sizeof(socks->address),
rewrite_flags, &out->map_expires, &exit_source2)) {
control_event_stream_status(conn, STREAM_EVENT_REMAP,
REMAP_STREAM_SOURCE_CACHE);
}
if (out->exit_source == ADDRMAPSRC_NONE) {
/* If it wasn't a .exit before, maybe it turned into a .exit. Remember
* the original source of a .exit. */
out->exit_source = exit_source2;
}
}
/* Check to see whether we're about to use an address in the virtual
* range without actually having gotten it from an Automap. */
if (!out->automap && address_is_in_virtual_range(socks->address)) {
/* This address was probably handed out by
* client_dns_get_unmapped_address, but the mapping was discarded for some
* reason. Or the user typed in a virtual address range manually. We
* *don't* want to send the address through Tor; that's likely to fail,
* and may leak information.
*/
log_warn(LD_APP,"Missing mapping for virtual address '%s'. Refusing.",
safe_str_client(socks->address));
out->end_reason = END_STREAM_REASON_INTERNAL;
out->should_close = 1;
return;
}
}
/** Connection <b>conn</b> just finished its socks handshake, or the
* controller asked us to take care of it. If <b>circ</b> is defined,
* then that's where we'll want to attach it. Otherwise we have to
@ -929,133 +1122,36 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
crypt_path_t *cpath)
{
socks_request_t *socks = conn->socks_request;
hostname_type_t addresstype;
const or_options_t *options = get_options();
tor_addr_t addr_tmp;
/* We set this to true if this is an address we should automatically
* remap to a local address in VirtualAddrNetwork */
int automap = 0;
char orig_address[MAX_SOCKS_ADDR_LEN];
time_t map_expires = TIME_MAX;
time_t now = time(NULL);
connection_t *base_conn = ENTRY_TO_CONN(conn);
addressmap_entry_source_t exit_source = ADDRMAPSRC_NONE;
time_t now = time(NULL);
rewrite_result_t rr;
tor_strlower(socks->address); /* normalize it */
strlcpy(orig_address, socks->address, sizeof(orig_address));
log_debug(LD_APP,"Client asked for %s:%d",
safe_str_client(socks->address),
socks->port);
memset(&rr, 0, sizeof(rr));
connection_ap_handshake_rewrite(conn,&rr);
if (!strcmpend(socks->address, ".exit") && !options->AllowDotExit) {
log_warn(LD_APP, "The \".exit\" notation is disabled in Tor due to "
"security risks. Set AllowDotExit in your torrc to enable "
"it (at your own risk).");
control_event_client_status(LOG_WARN, "SOCKS_BAD_HOSTNAME HOSTNAME=%s",
escaped(socks->address));
connection_mark_unattached_ap(conn, END_STREAM_REASON_TORPROTOCOL);
return -1;
}
if (! conn->original_dest_address)
conn->original_dest_address = tor_strdup(conn->socks_request->address);
if (socks->command == SOCKS_COMMAND_RESOLVE &&
tor_addr_parse(&addr_tmp, socks->address)<0 &&
options->AutomapHostsOnResolve) {
automap = addressmap_address_should_automap(socks->address, options);
if (automap) {
const char *new_addr;
int addr_type = RESOLVED_TYPE_IPV4;
if (conn->socks_request->socks_version != 4) {
if (!conn->entry_cfg.ipv4_traffic ||
(conn->entry_cfg.ipv6_traffic && conn->entry_cfg.prefer_ipv6) ||
conn->entry_cfg.prefer_ipv6_virtaddr)
addr_type = RESOLVED_TYPE_IPV6;
}
new_addr = addressmap_register_virtual_address(
addr_type, tor_strdup(socks->address));
if (! new_addr) {
log_warn(LD_APP, "Unable to automap address %s",
escaped_safe_str(socks->address));
connection_mark_unattached_ap(conn, END_STREAM_REASON_INTERNAL);
return -1;
}
log_info(LD_APP, "Automapping %s to %s",
escaped_safe_str_client(socks->address),
safe_str_client(new_addr));
strlcpy(socks->address, new_addr, sizeof(socks->address));
}
}
if (socks->command == SOCKS_COMMAND_RESOLVE_PTR) {
unsigned rewrite_flags = 0;
if (conn->entry_cfg.use_cached_ipv4_answers)
rewrite_flags |= AMR_FLAG_USE_IPV4_DNS;
if (conn->entry_cfg.use_cached_ipv6_answers)
rewrite_flags |= AMR_FLAG_USE_IPV6_DNS;
if (addressmap_rewrite_reverse(socks->address, sizeof(socks->address),
rewrite_flags, &map_expires)) {
char *result = tor_strdup(socks->address);
/* remember _what_ is supposed to have been resolved. */
tor_snprintf(socks->address, sizeof(socks->address), "REVERSE[%s]",
orig_address);
connection_ap_handshake_socks_resolved(conn, RESOLVED_TYPE_HOSTNAME,
strlen(result), (uint8_t*)result,
-1,
map_expires);
connection_mark_unattached_ap(conn,
END_STREAM_REASON_DONE |
END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
if (rr.should_close) {
/* connection_ap_handshake_rewrite told us to close the connection,
* either because it sent back an answer, or because it sent back an
* error */
connection_mark_unattached_ap(conn, rr.end_reason);
if (END_STREAM_REASON_DONE == (rr.end_reason & END_STREAM_REASON_MASK))
return 0;
}
if (options->ClientDNSRejectInternalAddresses) {
/* Don't let people try to do a reverse lookup on 10.0.0.1. */
tor_addr_t addr;
int ok;
ok = tor_addr_parse_PTR_name(
&addr, socks->address, AF_UNSPEC, 1);
if (ok == 1 && tor_addr_is_internal(&addr, 0)) {
connection_ap_handshake_socks_resolved(conn, RESOLVED_TYPE_ERROR,
0, NULL, -1, TIME_MAX);
connection_mark_unattached_ap(conn,
END_STREAM_REASON_SOCKSPROTOCOL |
END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
return -1;
}
}
} else if (!automap) {
/* For address map controls, remap the address. */
unsigned rewrite_flags = 0;
if (conn->entry_cfg.use_cached_ipv4_answers)
rewrite_flags |= AMR_FLAG_USE_IPV4_DNS;
if (conn->entry_cfg.use_cached_ipv6_answers)
rewrite_flags |= AMR_FLAG_USE_IPV6_DNS;
if (addressmap_rewrite(socks->address, sizeof(socks->address),
rewrite_flags, &map_expires, &exit_source)) {
control_event_stream_status(conn, STREAM_EVENT_REMAP,
REMAP_STREAM_SOURCE_CACHE);
}
else
return -1;
}
if (!automap && address_is_in_virtual_range(socks->address)) {
/* This address was probably handed out by client_dns_get_unmapped_address,
* but the mapping was discarded for some reason. We *don't* want to send
* the address through Tor; that's likely to fail, and may leak
* information.
*/
log_warn(LD_APP,"Missing mapping for virtual address '%s'. Refusing.",
safe_str_client(socks->address));
connection_mark_unattached_ap(conn, END_STREAM_REASON_INTERNAL);
return -1;
}
const time_t map_expires = rr.map_expires;
const int automap = rr.automap;
const addressmap_entry_source_t exit_source = rr.exit_source;
/* Parse the address provided by SOCKS. Modify it in-place if it
* specifies a hidden-service (.onion) or particular exit node (.exit).
*/
addresstype = parse_extended_hostname(socks->address);
const hostname_type_t addresstype = parse_extended_hostname(socks->address);
/* Now see whether the hostname is bogus. This could happen because of an
* onion hostname whose format we don't recognize. */
if (addresstype == BAD_HOSTNAME) {
control_event_client_status(LOG_WARN, "SOCKS_BAD_HOSTNAME HOSTNAME=%s",
escaped(socks->address));
@ -1063,16 +1159,21 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
/* If this is a .exit hostname, strip off the .name.exit part, and
* see whether we're going to connect there, and otherwise handle it.
* (The ".exit" part got stripped off by "parse_extended_hostname").
*
* We'll set chosen_exit_name and/or close the connection as appropriate.
*/
if (addresstype == EXIT_HOSTNAME) {
/* foo.exit -- modify conn->chosen_exit_node to specify the exit
* node, and conn->address to hold only the address portion. */
char *s = strrchr(socks->address,'.');
/* If StrictNodes is not set, then .exit overrides ExcludeNodes. */
/* If StrictNodes is not set, then .exit overrides ExcludeNodes but
* not ExcludeExitNodes. */
routerset_t *excludeset = options->StrictNodes ?
options->ExcludeExitNodesUnion_ : options->ExcludeExitNodes;
const node_t *node;
const node_t *node = NULL;
/* If this .exit was added by an AUTOMAP, then it came straight from
* a user. Make sure that options->AllowDotExit permits that. */
if (exit_source == ADDRMAPSRC_AUTOMAP && !options->AllowDotExit) {
/* Whoops; this one is stale. It must have gotten added earlier,
* when AllowDotExit was on. */
@ -1085,6 +1186,8 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
/* Double-check to make sure there are no .exits coming from
* impossible/weird sources. */
if (exit_source == ADDRMAPSRC_DNS ||
(exit_source == ADDRMAPSRC_NONE && !options->AllowDotExit)) {
/* It shouldn't be possible to get a .exit address from any of these
@ -1099,9 +1202,12 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
}
tor_assert(!automap);
/* Now, find the character before the .(name) part. */
char *s = strrchr(socks->address,'.');
if (s) {
/* The address was of the form "(stuff).(name).exit */
if (s[1] != '\0') {
/* Looks like a real .exit one. */
conn->chosen_exit_name = tor_strdup(s+1);
node = node_get_by_nickname(conn->chosen_exit_name, 1);
@ -1120,7 +1226,8 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
} else {
/* It looks like they just asked for "foo.exit". */
/* It looks like they just asked for "foo.exit". That's a special
* form that means (foo's address).foo.exit. */
conn->chosen_exit_name = tor_strdup(socks->address);
node = node_get_by_nickname(conn->chosen_exit_name, 1);
@ -1129,6 +1236,7 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
node_get_address_string(node, socks->address, sizeof(socks->address));
}
}
/* Now make sure that the chosen exit exists... */
if (!node) {
log_warn(LD_APP,
@ -1150,8 +1258,12 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
implies no. */
}
/* Now, handle everything that isn't a .onion address. */
if (addresstype != ONION_HOSTNAME) {
/* not a hidden-service request (i.e. normal or .exit) */
/* Not a hidden-service request. It's either a hostname or an IP,
* possibly with a .exit that we stripped off. */
/* Check for funny characters in the address. */
if (address_is_invalid_destination(socks->address, 1)) {
control_event_client_status(LOG_WARN, "SOCKS_BAD_HOSTNAME HOSTNAME=%s",
escaped(socks->address));
@ -1162,6 +1274,8 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
/* If we're running in Tor2webMode, we don't allow anything BUT .onion
* addresses. */
if (options->Tor2webMode) {
log_warn(LD_APP, "Refusing to connect to non-hidden-service hostname %s "
"because tor2web mode is enabled.",
@ -1170,12 +1284,15 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
/* See if this is a hostname lookup that we can answer immediately.
* (For example, an attempt to look up the IP address for an IP address.)
*/
if (socks->command == SOCKS_COMMAND_RESOLVE) {
tor_addr_t answer;
/* Reply to resolves immediately if we can. */
if (tor_addr_parse(&answer, socks->address) >= 0) {/* is it an IP? */
/* remember _what_ is supposed to have been resolved. */
strlcpy(socks->address, orig_address, sizeof(socks->address));
strlcpy(socks->address, rr.orig_address, sizeof(socks->address));
connection_ap_handshake_socks_resolved_addr(conn, &answer, -1,
map_expires);
connection_mark_unattached_ap(conn,
@ -1186,14 +1303,22 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
tor_assert(!automap);
rep_hist_note_used_resolve(now); /* help predict this next time */
} else if (socks->command == SOCKS_COMMAND_CONNECT) {
/* Special handling for attempts to connect */
tor_assert(!automap);
/* Don't allow connections to port 0. */
if (socks->port == 0) {
log_notice(LD_APP,"Application asked to connect to port 0. Refusing.");
connection_mark_unattached_ap(conn, END_STREAM_REASON_TORPROTOCOL);
return -1;
}
/* You can't make connections to internal addresses, by default.
* Exceptions are begindir requests (where the address is meaningless,
* or cases where you've hand-configured a particular exit, thereby
* making the local address meaningful. */
if (options->ClientRejectInternalAddresses &&
!conn->use_begindir && !conn->chosen_exit_name && !circ) {
/* If we reach this point then we don't want to allow internal
* addresses. Check if we got one. */
tor_addr_t addr;
if (tor_addr_hostname_is_local(socks->address) ||
(tor_addr_parse(&addr, socks->address) >= 0 &&
@ -1228,31 +1353,47 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
connection_mark_unattached_ap(conn, END_STREAM_REASON_PRIVATE_ADDR);
return -1;
}
}
} /* end "if we should check for internal addresses" */
/* Okay. We're still doing a CONNECT, and it wasn't a private
* address. Do special handling for literal IP addresses */
{
tor_addr_t addr;
/* XXX Duplicate call to tor_addr_parse. */
if (tor_addr_parse(&addr, socks->address) >= 0) {
/* If we reach this point, it's an IPv4 or an IPv6 address. */
sa_family_t family = tor_addr_family(&addr);
/* XXXX bug: the second one should be "ipv6_traffic" */
if ((family == AF_INET && ! conn->entry_cfg.ipv4_traffic) ||
(family == AF_INET6 && ! conn->entry_cfg.ipv4_traffic)) {
/* You can't do an IPv4 address on a v6-only socks listener,
* or vice versa. */
log_warn(LD_NET, "Rejecting SOCKS request for an IP address "
"family that this listener does not support.");
connection_mark_unattached_ap(conn, END_STREAM_REASON_ENTRYPOLICY);
return -1;
} else if (family == AF_INET6 && socks->socks_version == 4) {
/* You can't make a socks4 request to an IPv6 address. Socks4
* doesn't support that. */
log_warn(LD_NET, "Rejecting SOCKS4 request for an IPv6 address.");
connection_mark_unattached_ap(conn, END_STREAM_REASON_ENTRYPOLICY);
return -1;
} else if (socks->socks_version == 4 && !conn->entry_cfg.ipv4_traffic) {
/* You can't do any kind of Socks4 request when IPv4 is forbidden.
*
* XXX raise this check outside the enclosing block? */
log_warn(LD_NET, "Rejecting SOCKS4 request on a listener with "
"no IPv4 traffic supported.");
connection_mark_unattached_ap(conn, END_STREAM_REASON_ENTRYPOLICY);
return -1;
} else if (family == AF_INET6) {
/* Tell the exit: we won't accept any ipv4 connection to an IPv6
* address. */
conn->entry_cfg.ipv4_traffic = 0;
} else if (family == AF_INET) {
/* Tell the exit: we won't accept any ipv6 connection to an IPv4
* address. */
conn->entry_cfg.ipv6_traffic = 0;
}
}
@ -1261,6 +1402,9 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
if (socks->socks_version == 4)
conn->entry_cfg.ipv6_traffic = 0;
/* Still handling CONNECT. Now, check for exit enclaves. (Which we
* don't do on BEGINDIR, or there is a chosen exit.)
*/
if (!conn->use_begindir && !conn->chosen_exit_name && !circ) {
/* see if we can find a suitable enclave exit */
const node_t *r =
@ -1277,11 +1421,13 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
}
}
/* warn or reject if it's using a dangerous port */
/* Still handling CONNECT: warn or reject if it's using a dangerous
* port. */
if (!conn->use_begindir && !conn->chosen_exit_name && !circ)
if (consider_plaintext_ports(conn, socks->port) < 0)
return -1;
/* Remember the port so that we do predicted requests there. */
if (!conn->use_begindir) {
/* help predict this next time */
rep_hist_note_used_port(now, socks->port);
@ -1290,25 +1436,41 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
rep_hist_note_used_resolve(now); /* help predict this next time */
/* no extra processing needed */
} else {
/* We should only be doing CONNECT or RESOLVE! */
tor_fragile_assert();
}
/* Okay. At this point we've set chosen_exit_name if needed, rewritten the
* address, and decided not to reject it for any number of reasons. Now
* mark the connection as waiting for a circuit, and try to attach it!
*/
base_conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
if ((circ && connection_ap_handshake_attach_chosen_circuit(
conn, circ, cpath) < 0) ||
(!circ &&
connection_ap_handshake_attach_circuit(conn) < 0)) {
/* If we were given a circuit to attach to, try to attach. Otherwise,
* try to find a good one and attach to that. */
int rv;
if (circ)
rv = connection_ap_handshake_attach_chosen_circuit(conn, circ, cpath);
else
rv = connection_ap_handshake_attach_circuit(conn);
/* If the above function returned 0 then we're waiting for a circuit.
* if it returned 1, we're attached. Both are okay. But if it returned
* -1, there was an error, so make sure the connection is marked, and
* return -1. */
if (rv < 0) {
if (!base_conn->marked_for_close)
connection_mark_unattached_ap(conn, END_STREAM_REASON_CANT_ATTACH);
return -1;
}
return 0;
} else {
/* it's a hidden-service request */
rend_cache_entry_t *entry;
int r;
rend_service_authorization_t *client_auth;
rend_data_t *rend_data;
/* If we get here, it's a request for a .onion address! */
tor_assert(!automap);
/* Check whether it's RESOLVE or RESOLVE_PTR. We don't handle those
* for hidden service addresses. */
if (SOCKS_COMMAND_IS_RESOLVE(socks->command)) {
/* if it's a resolve request, fail it right now, rather than
* building all the circuits and then realizing it won't work. */
@ -1322,6 +1484,8 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
/* If we were passed a circuit, then we need to fail. .onion addresses
* only work when we launch our own circuits for now. */
if (circ) {
log_warn(LD_CONTROL, "Attachstream to a circuit is not "
"supported for .onion addresses currently. Failing.");
@ -1329,15 +1493,22 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
return -1;
}
ENTRY_TO_EDGE_CONN(conn)->rend_data = rend_data =
/* Fill in the rend_data field so we can start doing a connection to
* a hidden service. */
rend_data_t *rend_data = ENTRY_TO_EDGE_CONN(conn)->rend_data =
tor_malloc_zero(sizeof(rend_data_t));
strlcpy(rend_data->onion_address, socks->address,
sizeof(rend_data->onion_address));
log_info(LD_REND,"Got a hidden service request for ID '%s'",
safe_str_client(rend_data->onion_address));
/* see if we already have it cached */
r = rend_cache_lookup_entry(rend_data->onion_address, -1, &entry);
if (r<0) {
/* see if we already have a hidden service descriptor cached for this
* address. */
rend_cache_entry_t *entry = NULL;
const int rend_cache_lookup_result =
rend_cache_lookup_entry(rend_data->onion_address, -1, &entry);
if (rend_cache_lookup_result < 0) {
/* We should already have rejected this address! */
log_warn(LD_BUG,"Invalid service name '%s'",
safe_str_client(rend_data->onion_address));
connection_mark_unattached_ap(conn, END_STREAM_REASON_TORPROTOCOL);
@ -1348,8 +1519,10 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
* a stable circuit yet, but we know we'll need *something*. */
rep_hist_note_used_internal(now, 0, 1);
/* Look up if we have client authorization for it. */
client_auth = rend_client_lookup_service_authorization(
/* Look up if we have client authorization configured for this hidden
* service. If we do, associate it with the rend_data. */
rend_service_authorization_t *client_auth =
rend_client_lookup_service_authorization(
rend_data->onion_address);
if (client_auth) {
log_info(LD_REND, "Using previously configured client authorization "
@ -1358,12 +1531,16 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
client_auth->descriptor_cookie, REND_DESC_COOKIE_LEN);
rend_data->auth_type = client_auth->auth_type;
}
if (r==0) {
/* Now, we either launch an attempt to connect to the hidden service,
* or we launch an attempt to look up its descriptor, depending on
* whether we had the descriptor. */
if (rend_cache_lookup_result == 0) {
base_conn->state = AP_CONN_STATE_RENDDESC_WAIT;
log_info(LD_REND, "Unknown descriptor %s. Fetching.",
safe_str_client(rend_data->onion_address));
rend_client_refetch_v2_renddesc(rend_data);
} else { /* r > 0 */
} else { /* rend_cache_lookup_result > 0 */
base_conn->state = AP_CONN_STATE_CIRCUIT_WAIT;
log_info(LD_REND, "Descriptor is here. Great.");
if (connection_ap_handshake_attach_circuit(conn) < 0) {
@ -1374,6 +1551,7 @@ connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
}
return 0;
}
return 0; /* unreached but keeps the compiler happy */
}

25
src/or/connection_edge.h
View File

@ -143,6 +143,31 @@ STATIC int begin_cell_parse(const cell_t *cell, begin_cell_t *bcell,
STATIC int connected_cell_format_payload(uint8_t *payload_out,
const tor_addr_t *addr,
uint32_t ttl);
typedef struct {
/** Original address, after we lowercased it but before we started
* mapping it.
*/
char orig_address[MAX_SOCKS_ADDR_LEN];
/** True iff the address has been automatically remapped to a local
* address in VirtualAddrNetwork. (Only set true when we do a resolve
* and get a virtual address; not when we connect to the address.) */
int automap;
/** If this connection has a .exit address, who put it there? */
addressmap_entry_source_t exit_source;
/** If we've rewritten the address, when does this map expire? */
time_t map_expires;
/** If we should close the connection, this is the end_reason to pass
* to connection_mark_unattached_ap */
int end_reason;
/** True iff we should close the connection, either because of error or
* because of successful early RESOLVED reply. */
int should_close;
} rewrite_result_t;
STATIC void connection_ap_handshake_rewrite(entry_connection_t *conn,
rewrite_result_t *out);
#endif
#endif

1
src/test/include.am
View File

@ -31,6 +31,7 @@ src_test_test_SOURCES = \
src/test/test_data.c \
src/test/test_dir.c \
src/test/test_checkdir.c \
src/test/test_entryconn.c \
src/test/test_entrynodes.c \
src/test/test_extorport.c \
src/test/test_introduce.c \

2
src/test/test.c
View File

@ -1313,6 +1313,7 @@ extern struct testcase_t channel_tests[];
extern struct testcase_t channeltls_tests[];
extern struct testcase_t relay_tests[];
extern struct testcase_t scheduler_tests[];
extern struct testcase_t entryconn_tests[];
static struct testgroup_t testgroups[] = {
{ "", test_array },
@ -1337,6 +1338,7 @@ static struct testgroup_t testgroups[] = {
{ "circuitmux/", circuitmux_tests },
{ "options/", options_tests },
{ "entrynodes/", entrynodes_tests },
{ "entryconn/", entryconn_tests },
{ "extorport/", extorport_tests },
{ "control/", controller_event_tests },
{ "hs/", hs_tests },

3
src/test/test_config.c
View File

@ -51,8 +51,7 @@ test_config_addressmap(void *arg)
/* Use old interface for now, so we don't need to rewrite the unit tests */
#define addressmap_rewrite(a,s,eo,ao) \
addressmap_rewrite((a),(s),AMR_FLAG_USE_IPV4_DNS|AMR_FLAG_USE_IPV6_DNS, \
(eo),(ao))
addressmap_rewrite((a),(s), ~0, (eo),(ao))
/* MapAddress .invalidwildcard.com .torserver.exit - no match */
strlcpy(address, "www.invalidwildcard.com", sizeof(address));

770
src/test/test_entryconn.c Normal file
View File

@ -0,0 +1,770 @@
/* Copyright (c) 2014-2015, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "orconfig.h"
#define CONNECTION_PRIVATE
#define CONNECTION_EDGE_PRIVATE
#include "or.h"
#include "test.h"
#include "addressmap.h"
#include "config.h"
#include "confparse.h"
#include "connection.h"
#include "connection_edge.h"
static void *
entryconn_rewrite_setup(const struct testcase_t *tc)
{
(void)tc;
entry_connection_t *ec = entry_connection_new(CONN_TYPE_AP, AF_INET);
addressmap_init();
return ec;
}
static int
entryconn_rewrite_teardown(const struct testcase_t *tc, void *arg)
{
(void)tc;
entry_connection_t *ec = arg;
if (ec)
connection_free_(ENTRY_TO_CONN(ec));
addressmap_free_all();
return 1;
}
static struct testcase_setup_t test_rewrite_setup = {
entryconn_rewrite_setup, entryconn_rewrite_teardown
};
/* Simple rewrite: no changes needed */
static void
test_entryconn_rewrite_basic(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
tt_assert(ec->socks_request);
strlcpy(ec->socks_request->address, "www.TORproject.org",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_int_op(rr.automap, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.torproject.org");
tt_str_op(ec->socks_request->address, OP_EQ, "www.torproject.org");
tt_str_op(ec->original_dest_address, OP_EQ, "www.torproject.org");
done:
;
}
/* Rewrite but reject because of disallowed .exit */
static void
test_entryconn_rewrite_bad_dotexit(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
get_options_mutable()->AllowDotExit = 0;
tt_assert(ec->socks_request);
strlcpy(ec->socks_request->address, "www.TORproject.org.foo.exit",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.should_close, OP_EQ, 1);
tt_int_op(rr.end_reason, OP_EQ, END_STREAM_REASON_TORPROTOCOL);
done:
;
}
/* Automap on resolve, connect to automapped address, resolve again and get
* same answer. (IPv4) */
static void
test_entryconn_rewrite_automap_ipv4(void *arg)
{
entry_connection_t *ec = arg;
entry_connection_t *ec2=NULL, *ec3=NULL;
rewrite_result_t rr;
char *msg = NULL;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
ec3 = entry_connection_new(CONN_TYPE_AP, AF_INET);
get_options_mutable()->AutomapHostsOnResolve = 1;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes, tor_strdup("."));
parse_virtual_addr_network("127.202.0.0/16", AF_INET, 0, &msg);
/* Automap this on resolve. */
strlcpy(ec->socks_request->address, "WWW.MIT.EDU",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
tt_str_op(ec->original_dest_address, OP_EQ, "www.mit.edu");
tt_assert(!strcmpstart(ec->socks_request->address,"127.202."));
/* Connect to it and make sure we get the original address back. */
strlcpy(ec2->socks_request->address, ec->socks_request->address,
sizeof(ec2->socks_request->address));
ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, ec->socks_request->address);
tt_str_op(ec2->original_dest_address, OP_EQ, ec->socks_request->address);
tt_str_op(ec2->socks_request->address, OP_EQ, "www.mit.edu");
/* Resolve it again, make sure the answer is the same. */
strlcpy(ec3->socks_request->address, "www.MIT.EDU",
sizeof(ec3->socks_request->address));
ec3->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec3, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
tt_str_op(ec3->original_dest_address, OP_EQ, "www.mit.edu");
tt_str_op(ec3->socks_request->address, OP_EQ,
ec->socks_request->address);
done:
connection_free_(ENTRY_TO_CONN(ec2));
connection_free_(ENTRY_TO_CONN(ec3));
}
/* Automap on resolve, connect to automapped address, resolve again and get
* same answer. (IPv6) */
static void
test_entryconn_rewrite_automap_ipv6(void *arg)
{
(void)arg;
entry_connection_t *ec =NULL;
entry_connection_t *ec2=NULL, *ec3=NULL;
rewrite_result_t rr;
char *msg = NULL;
ec = entry_connection_new(CONN_TYPE_AP, AF_INET6);
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
ec3 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
get_options_mutable()->AutomapHostsOnResolve = 1;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes, tor_strdup("."));
parse_virtual_addr_network("FE80::/32", AF_INET6, 0, &msg);
/* Automap this on resolve. */
strlcpy(ec->socks_request->address, "WWW.MIT.EDU",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
tt_str_op(ec->original_dest_address, OP_EQ, "www.mit.edu");
/* Yes, this [ should be here. */
tt_assert(!strcmpstart(ec->socks_request->address,"[fe80:"));
/* Connect to it and make sure we get the original address back. */
strlcpy(ec2->socks_request->address, ec->socks_request->address,
sizeof(ec2->socks_request->address));
ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, ec->socks_request->address);
tt_str_op(ec2->original_dest_address, OP_EQ, ec->socks_request->address);
tt_str_op(ec2->socks_request->address, OP_EQ, "www.mit.edu");
/* Resolve it again, make sure the answer is the same. */
strlcpy(ec3->socks_request->address, "www.MIT.EDU",
sizeof(ec3->socks_request->address));
ec3->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec3, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.mit.edu");
tt_str_op(ec3->original_dest_address, OP_EQ, "www.mit.edu");
tt_str_op(ec3->socks_request->address, OP_EQ,
ec->socks_request->address);
done:
connection_free_(ENTRY_TO_CONN(ec));
connection_free_(ENTRY_TO_CONN(ec2));
connection_free_(ENTRY_TO_CONN(ec3));
}
#if 0
/* FFFF not actually supported. */
/* automap on resolve, reverse lookup. */
static void
test_entryconn_rewrite_automap_reverse(void *arg)
{
entry_connection_t *ec = arg;
entry_connection_t *ec2=NULL;
rewrite_result_t rr;
char *msg = NULL;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
get_options_mutable()->AutomapHostsOnResolve = 1;
get_options_mutable()->SafeLogging_ = SAFELOG_SCRUB_NONE;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes,
tor_strdup(".bloom"));
parse_virtual_addr_network("127.80.0.0/16", AF_INET, 0, &msg);
/* Automap this on resolve. */
strlcpy(ec->socks_request->address, "www.poldy.BLOOM",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.poldy.bloom");
tt_str_op(ec->original_dest_address, OP_EQ, "www.poldy.bloom");
tt_assert(!strcmpstart(ec->socks_request->address,"127.80."));
strlcpy(ec2->socks_request->address, ec->socks_request->address,
sizeof(ec2->socks_request->address));
ec2->entry_cfg.use_cached_ipv4_answers = 1; // XXXX REMOVE. This is only there to hide a bug.
ec2->socks_request->command = SOCKS_COMMAND_RESOLVE_PTR;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 1);
tt_int_op(rr.end_reason, OP_EQ,
END_STREAM_REASON_DONE|END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
done:
connection_free_(ENTRY_TO_CONN(ec2));
}
#endif
/* Rewrite because of cached DNS entry. */
static void
test_entryconn_rewrite_cached_dns_ipv4(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
time_t expires = time(NULL) + 3600;
entry_connection_t *ec2=NULL;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
addressmap_register("www.friendly.example.com",
tor_strdup("240.240.241.241"),
expires,
ADDRMAPSRC_DNS,
0, 0);
strlcpy(ec->socks_request->address, "www.friendly.example.com",
sizeof(ec->socks_request->address));
strlcpy(ec2->socks_request->address, "www.friendly.example.com",
sizeof(ec2->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
ec2->entry_cfg.use_cached_ipv4_answers = 1; /* only ec2 gets this flag */
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.friendly.example.com");
tt_str_op(ec->socks_request->address, OP_EQ, "www.friendly.example.com");
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, expires);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.friendly.example.com");
tt_str_op(ec2->socks_request->address, OP_EQ, "240.240.241.241");
done:
connection_free_(ENTRY_TO_CONN(ec2));
}
/* Rewrite because of cached DNS entry. */
static void
test_entryconn_rewrite_cached_dns_ipv6(void *arg)
{
entry_connection_t *ec = NULL;
rewrite_result_t rr;
time_t expires = time(NULL) + 3600;
entry_connection_t *ec2=NULL;
(void)arg;
ec = entry_connection_new(CONN_TYPE_AP, AF_INET6);
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
addressmap_register("www.friendly.example.com",
tor_strdup("[::f00f]"),
expires,
ADDRMAPSRC_DNS,
0, 0);
strlcpy(ec->socks_request->address, "www.friendly.example.com",
sizeof(ec->socks_request->address));
strlcpy(ec2->socks_request->address, "www.friendly.example.com",
sizeof(ec2->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
ec2->entry_cfg.use_cached_ipv6_answers = 1; /* only ec2 gets this flag */
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.friendly.example.com");
tt_str_op(ec->socks_request->address, OP_EQ, "www.friendly.example.com");
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, expires);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "www.friendly.example.com");
tt_str_op(ec2->socks_request->address, OP_EQ, "[::f00f]");
done:
connection_free_(ENTRY_TO_CONN(ec));
connection_free_(ENTRY_TO_CONN(ec2));
}
/* Fail to connect to unmapped address in virtual range. */
static void
test_entryconn_rewrite_unmapped_virtual(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
entry_connection_t *ec2 = NULL;
char *msg = NULL;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET6);
parse_virtual_addr_network("18.202.0.0/16", AF_INET, 0, &msg);
parse_virtual_addr_network("[ABCD::]/16", AF_INET6, 0, &msg);
strlcpy(ec->socks_request->address, "18.202.5.5",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.should_close, OP_EQ, 1);
tt_int_op(rr.end_reason, OP_EQ, END_STREAM_REASON_INTERNAL);
tt_int_op(rr.automap, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
strlcpy(ec2->socks_request->address, "[ABCD:9::5314:9543]",
sizeof(ec2->socks_request->address));
ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.should_close, OP_EQ, 1);
tt_int_op(rr.end_reason, OP_EQ, END_STREAM_REASON_INTERNAL);
tt_int_op(rr.automap, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
done:
connection_free_(ENTRY_TO_CONN(ec2));
}
/* Rewrite because of mapaddress option */
static void
test_entryconn_rewrite_mapaddress(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
config_line_append(&get_options_mutable()->AddressMap,
"MapAddress", "meta metaobjects.example");
config_register_addressmaps(get_options());
strlcpy(ec->socks_request->address, "meta",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_int_op(rr.automap, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(ec->socks_request->address, OP_EQ, "metaobjects.example");
done:
;
}
/* Reject reverse lookups of internal address. */
static void
test_entryconn_rewrite_reject_internal_reverse(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
strlcpy(ec->socks_request->address, "10.0.0.1",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_RESOLVE_PTR;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.should_close, OP_EQ, 1);
tt_int_op(rr.end_reason, OP_EQ, END_STREAM_REASON_SOCKSPROTOCOL |
END_STREAM_REASON_FLAG_ALREADY_SOCKS_REPLIED);
tt_int_op(rr.automap, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
done:
;
}
/* Rewrite into .exit because of virtual address mapping */
static void
test_entryconn_rewrite_automap_exit(void *arg)
{
entry_connection_t *ec = arg;
entry_connection_t *ec2=NULL;
rewrite_result_t rr;
char *msg = NULL;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
get_options_mutable()->AutomapHostsOnResolve = 1;
get_options_mutable()->AllowDotExit = 1;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes,
tor_strdup(".EXIT"));
parse_virtual_addr_network("127.1.0.0/16", AF_INET, 0, &msg);
/* Automap this on resolve. */
strlcpy(ec->socks_request->address, "website.example.exit",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "website.example.exit");
tt_str_op(ec->original_dest_address, OP_EQ, "website.example.exit");
tt_assert(!strcmpstart(ec->socks_request->address,"127.1."));
/* Connect to it and make sure we get the original address back. */
strlcpy(ec2->socks_request->address, ec->socks_request->address,
sizeof(ec2->socks_request->address));
ec2->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_AUTOMAP);
tt_str_op(rr.orig_address, OP_EQ, ec->socks_request->address);
tt_str_op(ec2->original_dest_address, OP_EQ, ec->socks_request->address);
tt_str_op(ec2->socks_request->address, OP_EQ, "website.example.exit");
done:
connection_free_(ENTRY_TO_CONN(ec2));
}
/* Rewrite into .exit because of mapaddress */
static void
test_entryconn_rewrite_mapaddress_exit(void *arg)
{
entry_connection_t *ec = arg;
rewrite_result_t rr;
config_line_append(&get_options_mutable()->AddressMap,
"MapAddress", "*.example.com *.example.com.abc.exit");
config_register_addressmaps(get_options());
/* Automap this on resolve. */
strlcpy(ec->socks_request->address, "abc.example.com",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_TORRC);
tt_str_op(rr.orig_address, OP_EQ, "abc.example.com");
tt_str_op(ec->socks_request->address, OP_EQ, "abc.example.com.abc.exit");
done:
;
}
/* Map foo.onion to longthing.onion, and also automap. */
static void
test_entryconn_rewrite_mapaddress_automap_onion(void *arg)
{
entry_connection_t *ec = arg;
entry_connection_t *ec2 = NULL;
entry_connection_t *ec3 = NULL;
entry_connection_t *ec4 = NULL;
rewrite_result_t rr;
char *msg = NULL;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
ec3 = entry_connection_new(CONN_TYPE_AP, AF_INET);
ec4 = entry_connection_new(CONN_TYPE_AP, AF_INET);
get_options_mutable()->AutomapHostsOnResolve = 1;
get_options_mutable()->AllowDotExit = 1;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes,
tor_strdup(".onion"));
parse_virtual_addr_network("192.168.0.0/16", AF_INET, 0, &msg);
config_line_append(&get_options_mutable()->AddressMap,
"MapAddress", "foo.onion abcdefghijklmnop.onion");
config_register_addressmaps(get_options());
/* Connect to foo.onion. */
strlcpy(ec->socks_request->address, "foo.onion",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "foo.onion");
tt_str_op(ec->socks_request->address, OP_EQ, "abcdefghijklmnop.onion");
/* Okay, resolve foo.onion */
strlcpy(ec2->socks_request->address, "foo.onion",
sizeof(ec2->socks_request->address));
ec2->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "foo.onion");
tt_assert(!strcmpstart(ec2->socks_request->address, "192.168."));
/* Now connect */
strlcpy(ec3->socks_request->address, ec2->socks_request->address,
sizeof(ec3->socks_request->address));
ec3->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec3, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_assert(!strcmpstart(ec3->socks_request->address, "abcdefghijklmnop.onion"));
/* Now resolve abcefghijklmnop.onion. */
strlcpy(ec4->socks_request->address, "abcdefghijklmnop.onion",
sizeof(ec4->socks_request->address));
ec4->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec4, &rr);
tt_int_op(rr.automap, OP_EQ, 1);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "abcdefghijklmnop.onion");
tt_assert(!strcmpstart(ec4->socks_request->address, "192.168."));
/* XXXX doesn't work
tt_str_op(ec4->socks_request->address, OP_EQ, ec2->socks_request->address);
*/
done:
connection_free_(ENTRY_TO_CONN(ec2));
connection_free_(ENTRY_TO_CONN(ec3));
connection_free_(ENTRY_TO_CONN(ec4));
}
static void
test_entryconn_rewrite_mapaddress_automap_onion_common(entry_connection_t *ec,
int map_to_onion,
int map_to_address)
{
entry_connection_t *ec2 = NULL;
entry_connection_t *ec3 = NULL;
rewrite_result_t rr;
ec2 = entry_connection_new(CONN_TYPE_AP, AF_INET);
ec3 = entry_connection_new(CONN_TYPE_AP, AF_INET);
/* Connect to irc.example.com */
strlcpy(ec->socks_request->address, "irc.example.com",
sizeof(ec->socks_request->address));
ec->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "irc.example.com");
tt_str_op(ec->socks_request->address, OP_EQ,
map_to_onion ? "abcdefghijklmnop.onion" : "irc.example.com");
/* Okay, resolve irc.example.com */
strlcpy(ec2->socks_request->address, "irc.example.com",
sizeof(ec2->socks_request->address));
ec2->socks_request->command = SOCKS_COMMAND_RESOLVE;
connection_ap_handshake_rewrite(ec2, &rr);
tt_int_op(rr.automap, OP_EQ, map_to_onion && map_to_address);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
tt_i64_op(rr.map_expires, OP_EQ, TIME_MAX);
tt_int_op(rr.exit_source, OP_EQ, ADDRMAPSRC_NONE);
tt_str_op(rr.orig_address, OP_EQ, "irc.example.com");
if (map_to_onion && map_to_address)
tt_assert(!strcmpstart(ec2->socks_request->address, "192.168."));
/* Now connect */
strlcpy(ec3->socks_request->address, ec2->socks_request->address,
sizeof(ec3->socks_request->address));
ec3->socks_request->command = SOCKS_COMMAND_CONNECT;
connection_ap_handshake_rewrite(ec3, &rr);
tt_int_op(rr.automap, OP_EQ, 0);
tt_int_op(rr.should_close, OP_EQ, 0);
tt_int_op(rr.end_reason, OP_EQ, 0);
if (map_to_onion)
tt_assert(!strcmpstart(ec3->socks_request->address,
"abcdefghijklmnop.onion"));
done:
connection_free_(ENTRY_TO_CONN(ec2));
connection_free_(ENTRY_TO_CONN(ec3));
}
/* This time is the same, but we start with a mapping from a non-onion
* address. */
static void
test_entryconn_rewrite_mapaddress_automap_onion2(void *arg)
{
char *msg = NULL;
get_options_mutable()->AutomapHostsOnResolve = 1;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes,
tor_strdup(".onion"));
parse_virtual_addr_network("192.168.0.0/16", AF_INET, 0, &msg);
config_line_append(&get_options_mutable()->AddressMap,
"MapAddress", "irc.example.com abcdefghijklmnop.onion");
config_register_addressmaps(get_options());
test_entryconn_rewrite_mapaddress_automap_onion_common(arg, 1, 1);
}
/* Same as above, with automapped turned off */
static void
test_entryconn_rewrite_mapaddress_automap_onion3(void *arg)
{
config_line_append(&get_options_mutable()->AddressMap,
"MapAddress", "irc.example.com abcdefghijklmnop.onion");
config_register_addressmaps(get_options());
test_entryconn_rewrite_mapaddress_automap_onion_common(arg, 1, 0);
}
/* As above, with no mapping. */
static void
test_entryconn_rewrite_mapaddress_automap_onion4(void *arg)
{
char *msg = NULL;
get_options_mutable()->AutomapHostsOnResolve = 1;
smartlist_add(get_options_mutable()->AutomapHostsSuffixes,
tor_strdup(".onion"));
parse_virtual_addr_network("192.168.0.0/16", AF_INET, 0, &msg);
test_entryconn_rewrite_mapaddress_automap_onion_common(arg, 0, 1);
}
#define REWRITE(name) \
{ #name, test_entryconn_##name, TT_FORK, &test_rewrite_setup, NULL }
struct testcase_t entryconn_tests[] = {
REWRITE(rewrite_basic),
REWRITE(rewrite_bad_dotexit),
REWRITE(rewrite_automap_ipv4),
REWRITE(rewrite_automap_ipv6),
// REWRITE(rewrite_automap_reverse),
REWRITE(rewrite_cached_dns_ipv4),
REWRITE(rewrite_cached_dns_ipv6),
REWRITE(rewrite_unmapped_virtual),
REWRITE(rewrite_mapaddress),
REWRITE(rewrite_reject_internal_reverse),
REWRITE(rewrite_automap_exit),
REWRITE(rewrite_mapaddress_exit),
REWRITE(rewrite_mapaddress_automap_onion),
REWRITE(rewrite_mapaddress_automap_onion2),
REWRITE(rewrite_mapaddress_automap_onion3),
REWRITE(rewrite_mapaddress_automap_onion4),
END_OF_TESTCASES
};