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Infrastructure to test BEGIN_DIR cells.

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New socks command CONNECT_DIR. New config option TunnelDirConns that
builds a circ ending at the directory server and delivers a BEGIN_DIR
cell if it's running 0.1.2.2-alpha or later. We still need to make
one-hop circs when appropriate, while making other conns avoid them.


svn:r9098
This commit is contained in:
Roger Dingledine 2006-12-13 00:28:56 +00:00
parent f5164ba61d
commit 0dbf725927
10 changed files with 86 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/or/buffers.c
View File

@ -974,6 +974,7 @@ fetch_from_buf_socks(buf_t *buf, socks_request_t *req,
return 0; /* not yet */
req->command = (unsigned char) *(buf->cur+1);
if (req->command != SOCKS_COMMAND_CONNECT &&
req->command != SOCKS_COMMAND_CONNECT_DIR &&
req->command != SOCKS_COMMAND_RESOLVE &&
req->command != SOCKS_COMMAND_RESOLVE_PTR) {
/* not a connect or resolve or a resolve_ptr? we don't support it. */
@ -1065,6 +1066,7 @@ fetch_from_buf_socks(buf_t *buf, socks_request_t *req,
req->command = (unsigned char) *(buf->cur+1);
if (req->command != SOCKS_COMMAND_CONNECT &&
req->command != SOCKS_COMMAND_CONNECT_DIR &&
req->command != SOCKS_COMMAND_RESOLVE) {
/* not a connect or resolve? we don't support it. (No resolve_ptr with
* socks4.) */

30
src/or/circuituse.c
View File

@ -902,16 +902,18 @@ circuit_get_open_circ_or_launch(edge_connection_t *conn,
origin_circuit_t **circp)
{
origin_circuit_t *circ;
int is_resolve;
int check_exit_policy;
int need_uptime, need_internal;
tor_assert(conn);
tor_assert(circp);
tor_assert(conn->_base.state == AP_CONN_STATE_CIRCUIT_WAIT);
is_resolve = (conn->socks_request->command == SOCKS_COMMAND_RESOLVE ||
conn->socks_request->command == SOCKS_COMMAND_RESOLVE_PTR);
check_exit_policy =
(conn->socks_request->command == SOCKS_COMMAND_CONNECT) &&
!connection_edge_is_rendezvous_stream(conn);
need_uptime = smartlist_string_num_isin(get_options()->LongLivedPorts,
need_uptime = (conn->socks_request->command == SOCKS_COMMAND_CONNECT) &&
smartlist_string_num_isin(get_options()->LongLivedPorts,
conn->socks_request->port);
need_internal = desired_circuit_purpose != CIRCUIT_PURPOSE_C_GENERAL;
@ -941,7 +943,7 @@ circuit_get_open_circ_or_launch(edge_connection_t *conn,
}
/* Do we need to check exit policy? */
if (!is_resolve && !connection_edge_is_rendezvous_stream(conn)) {
if (check_exit_policy) {
struct in_addr in;
uint32_t addr = 0;
if (tor_inet_aton(conn->socks_request->address, &in))
@ -1125,13 +1127,17 @@ connection_ap_handshake_attach_chosen_circuit(edge_connection_t *conn,
link_apconn_to_circ(conn, circ);
tor_assert(conn->socks_request);
if (conn->socks_request->command == SOCKS_COMMAND_CONNECT) {
consider_recording_trackhost(conn, circ);
if (connection_ap_handshake_send_begin(conn, circ)<0)
return -1;
} else {
if (connection_ap_handshake_send_resolve(conn, circ)<0)
return -1;
switch (conn->socks_request->command) {
case SOCKS_COMMAND_CONNECT:
consider_recording_trackhost(conn, circ);
/* fall through */
case SOCKS_COMMAND_CONNECT_DIR:
if (connection_ap_handshake_send_begin(conn, circ)<0)
return -1;
break;
default:
if (connection_ap_handshake_send_resolve(conn, circ)<0)
return -1;
}
return 1;

1
src/or/config.c
View File

@ -247,6 +247,7 @@ static config_var_t _option_vars[] = {
OBSOLETE("TrafficShaping"),
VAR("TransListenAddress", LINELIST, TransListenAddress, NULL),
VAR("TransPort", UINT, TransPort, "0"),
VAR("TunnelDirConns", BOOL, TunnelDirConns, "0"),
VAR("UseEntryGuards", BOOL, UseEntryGuards, "1"),
VAR("User", STRING, User, NULL),
VAR("V1AuthoritativeDirectory",BOOL, V1AuthoritativeDir, "0"),

41
src/or/connection_edge.c
View File

@ -55,7 +55,7 @@ _connection_mark_unattached_ap(edge_connection_t *conn, int endreason,
"Bug: stream (marked at %s:%d) sending two socks replies?",
file, line);
if (conn->socks_request->command == SOCKS_COMMAND_CONNECT)
if (SOCKS_COMMAND_IS_CONNECT(conn->socks_request->command))
connection_ap_handshake_socks_reply(conn, NULL, 0, endreason);
else
connection_ap_handshake_socks_resolved(conn, RESOLVED_TYPE_ERROR,
@ -1213,6 +1213,8 @@ connection_ap_handshake_rewrite_and_attach(edge_connection_t *conn,
// XXXX NM Do anything here?
rep_hist_note_used_resolve(time(NULL)); /* help predict this next time */
} else if (socks->command == SOCKS_COMMAND_CONNECT_DIR) {
; /* nothing */
} else {
tor_fragile_assert();
}
@ -1230,7 +1232,7 @@ connection_ap_handshake_rewrite_and_attach(edge_connection_t *conn,
rend_cache_entry_t *entry;
int r;
if (socks->command != SOCKS_COMMAND_CONNECT) {
if (!SOCKS_COMMAND_IS_CONNECT(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. */
log_warn(LD_APP,
@ -1450,7 +1452,7 @@ connection_ap_handshake_process_socks(edge_connection_t *conn)
return -1;
}
if (socks->command == SOCKS_COMMAND_CONNECT)
if (SOCKS_COMMAND_IS_CONNECT(socks->command))
control_event_stream_status(conn, STREAM_EVENT_NEW, 0);
else
control_event_stream_status(conn, STREAM_EVENT_NEW_RESOLVE, 0);
@ -1546,7 +1548,7 @@ connection_ap_process_natd(edge_connection_t *conn)
if (strcmpstart(tmp_buf, "[DEST ")) {
log_warn(LD_APP,"Natd handshake was ill-formed; closing. The client "
"said: '%s'",
"said: %s",
escaped(tmp_buf));
connection_mark_unattached_ap(conn, END_STREAM_REASON_INVALID_NATD_DEST);
return -1;
@ -1564,7 +1566,7 @@ connection_ap_process_natd(edge_connection_t *conn)
socks->port = (uint16_t)
tor_parse_long(tbuf, 10, 1, 65535, &port_ok, &daddr);
if (!port_ok) {
log_warn(LD_APP,"Natd handshake failed; port '%s' is ill-formed or out "
log_warn(LD_APP,"Natd handshake failed; port %s is ill-formed or out "
"of range.", escaped(tbuf));
connection_mark_unattached_ap(conn, END_STREAM_REASON_INVALID_NATD_DEST);
return -1;
@ -1620,10 +1622,12 @@ connection_ap_handshake_send_begin(edge_connection_t *ap_conn,
{
char payload[CELL_PAYLOAD_SIZE];
int payload_len;
int begin_type;
tor_assert(ap_conn->_base.type == CONN_TYPE_AP);
tor_assert(ap_conn->_base.state == AP_CONN_STATE_CIRCUIT_WAIT);
tor_assert(ap_conn->socks_request);
tor_assert(SOCKS_COMMAND_IS_CONNECT(ap_conn->socks_request->command));
ap_conn->stream_id = get_unique_stream_id_by_circ(circ);
if (ap_conn->stream_id==0) {
@ -1641,9 +1645,11 @@ connection_ap_handshake_send_begin(edge_connection_t *ap_conn,
log_debug(LD_APP,
"Sending relay cell to begin stream %d.", ap_conn->stream_id);
begin_type = ap_conn->socks_request->command == SOCKS_COMMAND_CONNECT ?
RELAY_COMMAND_BEGIN : RELAY_COMMAND_BEGIN_DIR;
if (connection_edge_send_command(ap_conn, TO_CIRCUIT(circ),
RELAY_COMMAND_BEGIN,
payload, payload_len,
begin_type, payload, payload_len,
ap_conn->cpath_layer) < 0)
return -1; /* circuit is closed, don't continue */
@ -1669,15 +1675,14 @@ connection_ap_handshake_send_resolve(edge_connection_t *ap_conn,
const char *string_addr;
char inaddr_buf[32];
command = ap_conn->socks_request->command;
tor_assert(ap_conn->_base.type == CONN_TYPE_AP);
tor_assert(ap_conn->_base.state == AP_CONN_STATE_CIRCUIT_WAIT);
tor_assert(ap_conn->socks_request);
tor_assert(command == SOCKS_COMMAND_RESOLVE ||
command == SOCKS_COMMAND_RESOLVE_PTR);
tor_assert(circ->_base.purpose == CIRCUIT_PURPOSE_C_GENERAL);
command = ap_conn->socks_request->command;
tor_assert(SOCKS_COMMAND_IS_RESOLVE(command));
ap_conn->stream_id = get_unique_stream_id_by_circ(circ);
if (ap_conn->stream_id==0) {
connection_mark_unattached_ap(ap_conn, END_STREAM_REASON_INTERNAL);
@ -1729,7 +1734,8 @@ connection_ap_handshake_send_resolve(edge_connection_t *ap_conn,
* Return the other end of the socketpair, or -1 if error.
*/
int
connection_ap_make_bridge(char *address, uint16_t port)
connection_ap_make_bridge(char *address, uint16_t port,
const char *digest, int command)
{
int fd[2];
edge_connection_t *conn;
@ -1761,7 +1767,13 @@ connection_ap_make_bridge(char *address, uint16_t port)
strlcpy(conn->socks_request->address, address,
sizeof(conn->socks_request->address));
conn->socks_request->port = port;
conn->socks_request->command = SOCKS_COMMAND_CONNECT;
conn->socks_request->command = command;
if (command == SOCKS_COMMAND_CONNECT_DIR) {
conn->chosen_exit_name = tor_malloc(HEX_DIGEST_LEN+2);
conn->chosen_exit_name[0] = '$';
base16_encode(conn->chosen_exit_name+1,HEX_DIGEST_LEN+1,
digest, DIGEST_LEN);
}
conn->_base.address = tor_strdup("(local bridge)");
conn->_base.addr = 0;
@ -2396,8 +2408,7 @@ connection_ap_can_use_exit(edge_connection_t *conn, routerinfo_t *exit)
exit->exit_policy);
if (r == ADDR_POLICY_REJECTED || r == ADDR_POLICY_PROBABLY_REJECTED)
return 0;
} else { /* Some kind of a resolve. */
} else if (SOCKS_COMMAND_IS_RESOLVE(conn->socks_request->command)) {
/* Can't support reverse lookups without eventdns. */
if (conn->socks_request->command == SOCKS_COMMAND_RESOLVE_PTR &&
exit->has_old_dnsworkers)

3
src/or/control.c
View File

@ -1619,8 +1619,7 @@ getinfo_helper_events(control_connection_t *control_conn,
case AP_CONN_STATE_CONTROLLER_WAIT:
case AP_CONN_STATE_CIRCUIT_WAIT:
if (conn->socks_request &&
(conn->socks_request->command == SOCKS_COMMAND_RESOLVE ||
conn->socks_request->command == SOCKS_COMMAND_RESOLVE_PTR))
SOCKS_COMMAND_IS_RESOLVE(conn->socks_request->command))
state = "NEWRESOLVE";
else
state = "NEW";

35
src/or/directory.c
View File

@ -39,7 +39,7 @@ directory_initiate_command(const char *address, uint32_t addr, uint16_t port,
static void
directory_send_command(dir_connection_t *conn, const char *platform,
int purpose, const char *resource,
int purpose, int direct, const char *resource,
const char *payload, size_t payload_len);
static int directory_handle_command(dir_connection_t *conn);
static int body_is_plausible(const char *body, size_t body_len, int purpose);
@ -370,12 +370,18 @@ directory_initiate_command(const char *address, uint32_t addr,
const char *payload, size_t payload_len)
{
dir_connection_t *conn;
or_options_t *options = get_options();
int want_to_tunnel = options->TunnelDirConns && platform &&
tor_version_as_new_as(platform, "0.1.2.2-alpha");
tor_assert(address);
tor_assert(addr);
tor_assert(dir_port);
tor_assert(digest);
log_debug(LD_DIR, "private %d, want_to_tunnel %d.",
private_connection, want_to_tunnel);
switch (purpose) {
case DIR_PURPOSE_FETCH_DIR:
log_debug(LD_DIR,"initiating directory fetch");
@ -415,14 +421,14 @@ directory_initiate_command(const char *address, uint32_t addr,
/* give it an initial state */
conn->_base.state = DIR_CONN_STATE_CONNECTING;
conn->dirconn_direct = (private_connection == 0);
if (!private_connection) {
if (!private_connection && !want_to_tunnel) {
/* then we want to connect directly */
if (get_options()->HttpProxy) {
addr = get_options()->HttpProxyAddr;
dir_port = get_options()->HttpProxyPort;
conn->dirconn_direct = 1;
if (options->HttpProxy) {
addr = options->HttpProxyAddr;
dir_port = options->HttpProxyPort;
}
switch (connection_connect(TO_CONN(conn), conn->_base.address, addr,
@ -437,7 +443,7 @@ directory_initiate_command(const char *address, uint32_t addr,
/* fall through */
case 0:
/* queue the command on the outbuf */
directory_send_command(conn, platform, purpose, resource,
directory_send_command(conn, platform, purpose, 1, resource,
payload, payload_len);
connection_watch_events(TO_CONN(conn), EV_READ | EV_WRITE);
/* writable indicates finish, readable indicates broken link,
@ -448,8 +454,13 @@ directory_initiate_command(const char *address, uint32_t addr,
* populate it and add it at the right state
* socketpair and hook up both sides
*/
conn->_base.s = connection_ap_make_bridge(conn->_base.address,
conn->_base.port);
conn->dirconn_direct = 0;
conn->_base.s =
connection_ap_make_bridge(conn->_base.address, conn->_base.port,
digest,
private_connection ?
SOCKS_COMMAND_CONNECT :
SOCKS_COMMAND_CONNECT_DIR);
if (conn->_base.s < 0) {
log_warn(LD_NET,"Making AP bridge to dirserver failed.");
connection_mark_for_close(TO_CONN(conn));
@ -463,7 +474,7 @@ directory_initiate_command(const char *address, uint32_t addr,
}
conn->_base.state = DIR_CONN_STATE_CLIENT_SENDING;
/* queue the command on the outbuf */
directory_send_command(conn, platform, purpose, resource,
directory_send_command(conn, platform, purpose, 0, resource,
payload, payload_len);
connection_watch_events(TO_CONN(conn), EV_READ | EV_WRITE);
}
@ -474,7 +485,7 @@ directory_initiate_command(const char *address, uint32_t addr,
*/
static void
directory_send_command(dir_connection_t *conn, const char *platform,
int purpose, const char *resource,
int purpose, int direct, const char *resource,
const char *payload, size_t payload_len)
{
char proxystring[256];
@ -501,7 +512,7 @@ directory_send_command(dir_connection_t *conn, const char *platform,
}
/* come up with some proxy lines, if we're using one. */
if (get_options()->HttpProxy) {
if (direct && get_options()->HttpProxy) {
char *base64_authenticator=NULL;
const char *authenticator = get_options()->HttpProxyAuthenticator;

13
src/or/or.h
View File

@ -1648,8 +1648,10 @@ typedef struct {
char *ServerDNSResolvConfFile; /**< If provided, we configure our internal
* resolver from the file here rather than from
* /etc/resolv.conf (Unix) or the registry (Windows). */
int EnforceDistinctSubnets; /** If true, don't allow multiple routers in the
int EnforceDistinctSubnets; /**< If true, don't allow multiple routers in the
* same network zone in the same circuit. */
int TunnelDirConns; /**< If true, use BEGIN_DIR rather than BEGIN when
* possible. */
} or_options_t;
/** Persistent state for an onion router, as saved to disk. */
@ -1705,17 +1707,21 @@ static INLINE void or_state_mark_dirty(or_state_t *state, time_t when)
#define MAX_SOCKS_REPLY_LEN 1024
#define MAX_SOCKS_ADDR_LEN 256
#define SOCKS_COMMAND_CONNECT 0x01
#define SOCKS_COMMAND_CONNECT_DIR 0xE0
#define SOCKS_COMMAND_RESOLVE 0xF0
#define SOCKS_COMMAND_RESOLVE_PTR 0xF1
#define SOCKS_COMMAND_IS_CONNECT(c) ((c)==SOCKS_COMMAND_CONNECT || \
(c)==SOCKS_COMMAND_CONNECT_DIR)
#define SOCKS_COMMAND_IS_RESOLVE(c) ((c)==SOCKS_COMMAND_RESOLVE || \
(c)==SOCKS_COMMAND_RESOLVE_PTR)
/** State of a SOCKS request from a user to an OP */
struct socks_request_t {
char socks_version; /**< Which version of SOCKS did the client use? */
int command; /**< What has the user requested? One of CONNECT or RESOLVE. */
int command; /**< What has the user requested? One from the above list. */
size_t replylen; /**< Length of <b>reply</b>. */
char reply[MAX_SOCKS_REPLY_LEN]; /**< Write an entry into this string if
* we want to specify our own socks reply,
@ -2017,7 +2023,8 @@ int connection_ap_handshake_send_begin(edge_connection_t *ap_conn,
int connection_ap_handshake_send_resolve(edge_connection_t *ap_conn,
origin_circuit_t *circ);
int connection_ap_make_bridge(char *address, uint16_t port);
int connection_ap_make_bridge(char *address, uint16_t port,
const char *digest, int command);
void connection_ap_handshake_socks_reply(edge_connection_t *conn, char *reply,
size_t replylen,
int endreason);

3
src/or/relay.c
View File

@ -900,8 +900,7 @@ connection_edge_process_relay_cell_not_open(
"not in state resolve_wait. Dropping.");
return 0;
}
tor_assert(conn->socks_request->command == SOCKS_COMMAND_RESOLVE ||
conn->socks_request->command == SOCKS_COMMAND_RESOLVE_PTR);
tor_assert(SOCKS_COMMAND_IS_RESOLVE(conn->socks_request->command));
answer_len = cell->payload[RELAY_HEADER_SIZE+1];
if (rh->length < 2 || answer_len+2>rh->length) {
log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL,

3
src/or/router.c
View File

@ -1015,7 +1015,8 @@ router_new_address_suggestion(const char *suggestion)
/* first, learn what the IP address actually is */
if (!tor_inet_aton(suggestion, &in)) {
log_debug(LD_DIR, "Malformed X-Your-Address-Is header. Ignoring.");
log_debug(LD_DIR, "Malformed X-Your-Address-Is header %s. Ignoring.",
escaped(suggestion));
return;
}
addr = ntohl(in.s_addr);

2
src/or/routerparse.c
View File

@ -1821,6 +1821,8 @@ tor_version_as_new_as(const char *platform, const char *cutoff)
char *s, *start;
char tmp[128];
tor_assert(platform);
if (tor_version_parse(cutoff, &cutoff_version)<0) {
log_warn(LD_DIR,"Bug: cutoff version '%s' unparseable.",cutoff);
return 0;