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- /* Copyright (c) 2001 Matej Pfajfar.
- * Copyright (c) 2001-2004, Roger Dingledine.
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2016, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file connection_edge.h
- * \brief Header file for connection_edge.c.
- **/
- #ifndef TOR_CONNECTION_EDGE_H
- #define TOR_CONNECTION_EDGE_H
- #include "testsupport.h"
- #define connection_mark_unattached_ap(conn, endreason) \
- connection_mark_unattached_ap_((conn), (endreason), __LINE__, SHORT_FILE__)
- MOCK_DECL(void,connection_mark_unattached_ap_,
- (entry_connection_t *conn, int endreason,
- int line, const char *file));
- int connection_edge_reached_eof(edge_connection_t *conn);
- int connection_edge_process_inbuf(edge_connection_t *conn,
- int package_partial);
- int connection_edge_destroy(circid_t circ_id, edge_connection_t *conn);
- int connection_edge_end(edge_connection_t *conn, uint8_t reason);
- int connection_edge_end_errno(edge_connection_t *conn);
- int connection_edge_flushed_some(edge_connection_t *conn);
- int connection_edge_finished_flushing(edge_connection_t *conn);
- int connection_edge_finished_connecting(edge_connection_t *conn);
- void connection_ap_about_to_close(entry_connection_t *edge_conn);
- void connection_exit_about_to_close(edge_connection_t *edge_conn);
- int connection_ap_handshake_send_begin(entry_connection_t *ap_conn);
- int connection_ap_handshake_send_resolve(entry_connection_t *ap_conn);
- entry_connection_t *connection_ap_make_link(connection_t *partner,
- char *address, uint16_t port,
- const char *digest,
- int session_group,
- int isolation_flags,
- int use_begindir, int want_onehop);
- void connection_ap_handshake_socks_reply(entry_connection_t *conn, char *reply,
- size_t replylen,
- int endreason);
- MOCK_DECL(void,connection_ap_handshake_socks_resolved,
- (entry_connection_t *conn,
- int answer_type,
- size_t answer_len,
- const uint8_t *answer,
- int ttl,
- time_t expires));
- void connection_ap_handshake_socks_resolved_addr(entry_connection_t *conn,
- const tor_addr_t *answer,
- int ttl,
- time_t expires);
- int connection_exit_begin_conn(cell_t *cell, circuit_t *circ);
- int connection_exit_begin_resolve(cell_t *cell, or_circuit_t *circ);
- void connection_exit_connect(edge_connection_t *conn);
- int connection_edge_is_rendezvous_stream(edge_connection_t *conn);
- int connection_ap_can_use_exit(const entry_connection_t *conn,
- const node_t *exit);
- void connection_ap_expire_beginning(void);
- void connection_ap_rescan_and_attach_pending(void);
- void connection_ap_attach_pending(int retry);
- void connection_ap_mark_as_pending_circuit_(entry_connection_t *entry_conn,
- const char *file, int line);
- #define connection_ap_mark_as_pending_circuit(c) \
- connection_ap_mark_as_pending_circuit_((c), __FILE__, __LINE__)
- void connection_ap_mark_as_non_pending_circuit(entry_connection_t *entry_conn);
- #define CONNECTION_AP_EXPECT_NONPENDING(c) do { \
- if (ENTRY_TO_CONN(c)->state == AP_CONN_STATE_CIRCUIT_WAIT) { \
- log_warn(LD_BUG, "At %s:%d: %p was unexpectedly in circuit_wait.", \
- __FILE__, __LINE__, (c)); \
- connection_ap_mark_as_non_pending_circuit(c); \
- } \
- } while (0)
- void connection_ap_fail_onehop(const char *failed_digest,
- cpath_build_state_t *build_state);
- void circuit_discard_optional_exit_enclaves(extend_info_t *info);
- int connection_ap_detach_retriable(entry_connection_t *conn,
- origin_circuit_t *circ,
- int reason);
- int connection_ap_process_transparent(entry_connection_t *conn);
- int address_is_invalid_destination(const char *address, int client);
- int connection_ap_rewrite_and_attach_if_allowed(entry_connection_t *conn,
- origin_circuit_t *circ,
- crypt_path_t *cpath);
- int connection_ap_handshake_rewrite_and_attach(entry_connection_t *conn,
- origin_circuit_t *circ,
- crypt_path_t *cpath);
- /** Possible return values for parse_extended_hostname. */
- typedef enum hostname_type_t {
- NORMAL_HOSTNAME, ONION_HOSTNAME, EXIT_HOSTNAME, BAD_HOSTNAME
- } hostname_type_t;
- hostname_type_t parse_extended_hostname(char *address);
- #if defined(HAVE_NET_IF_H) && defined(HAVE_NET_PFVAR_H)
- int get_pf_socket(void);
- #endif
- int connection_edge_compatible_with_circuit(const entry_connection_t *conn,
- const origin_circuit_t *circ);
- int connection_edge_update_circuit_isolation(const entry_connection_t *conn,
- origin_circuit_t *circ,
- int dry_run);
- void circuit_clear_isolation(origin_circuit_t *circ);
- streamid_t get_unique_stream_id_by_circ(origin_circuit_t *circ);
- void connection_edge_free_all(void);
- void connection_ap_warn_and_unmark_if_pending_circ(
- entry_connection_t *entry_conn,
- const char *where);
- /** @name Begin-cell flags
- *
- * These flags are used in RELAY_BEGIN cells to change the default behavior
- * of the cell.
- *
- * @{
- **/
- /** When this flag is set, the client is willing to get connected to IPv6
- * addresses */
- #define BEGIN_FLAG_IPV6_OK (1u<<0)
- /** When this flag is set, the client DOES NOT support connecting to IPv4
- * addresses. (The sense of this flag is inverted from IPV6_OK, so that the
- * old default behavior of Tor is equivalent to having all flags set to 0.)
- **/
- #define BEGIN_FLAG_IPV4_NOT_OK (1u<<1)
- /** When this flag is set, if we find both an IPv4 and an IPv6 address,
- * we use the IPv6 address. Otherwise we use the IPv4 address. */
- #define BEGIN_FLAG_IPV6_PREFERRED (1u<<2)
- /**@}*/
- #ifdef CONNECTION_EDGE_PRIVATE
- /** A parsed BEGIN or BEGIN_DIR cell */
- typedef struct begin_cell_t {
- /** The address the client has asked us to connect to, or NULL if this is
- * a BEGIN_DIR cell*/
- char *address;
- /** The flags specified in the BEGIN cell's body. One or more of
- * BEGIN_FLAG_*. */
- uint32_t flags;
- /** The client's requested port. */
- uint16_t port;
- /** The client's requested Stream ID */
- uint16_t stream_id;
- /** True iff this is a BEGIN_DIR cell. */
- unsigned is_begindir : 1;
- } begin_cell_t;
- STATIC int begin_cell_parse(const cell_t *cell, begin_cell_t *bcell,
- uint8_t *end_reason_out);
- 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
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