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- /* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */
- /* See LICENSE for licensing information */
- /* $Id$ */
- #ifndef __OR_H
- #define __OR_H
- #include "orconfig.h"
- #include <stdio.h>
- #include <stdlib.h>
- #include <limits.h>
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #ifdef HAVE_STRING_H
- #include <string.h>
- #endif
- #ifdef HAVE_SIGNAL_H
- #include <signal.h>
- #endif
- #ifdef HAVE_NETDB_H
- #include <netdb.h>
- #endif
- #ifdef HAVE_CTYPE_H
- #include <ctype.h>
- #endif
- #include "../common/torint.h"
- #ifdef HAVE_SYS_POLL_H
- #include <sys/poll.h>
- #elif HAVE_POLL_H
- #include <poll.h>
- #else
- #include "../common/fakepoll.h"
- #endif
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h> /* Must be included before sys/stat.h for Ultrix */
- #endif
- #ifdef HAVE_SYS_WAIT_H
- #include <sys/wait.h>
- #endif
- #ifdef HAVE_SYS_FCNTL_H
- #include <sys/fcntl.h>
- #endif
- #ifdef HAVE_FCNTL_H
- #include <fcntl.h>
- #endif
- #ifdef HAVE_SYS_IOCTL_H
- #include <sys/ioctl.h>
- #endif
- #ifdef HAVE_SYS_SOCKET_H
- #include <sys/socket.h>
- #endif
- #ifdef HAVE_SYS_TIME_H
- #include <sys/time.h>
- #endif
- #ifdef HAVE_SYS_STAT_H
- #include <sys/stat.h>
- #endif
- #ifdef HAVE_NETINET_IN_H
- #include <netinet/in.h>
- #endif
- #ifdef HAVE_ARPA_INET_H
- #include <arpa/inet.h>
- #endif
- #ifdef HAVE_ERRNO_H
- #include <errno.h>
- #endif
- #ifdef HAVE_ASSERT_H
- #include <assert.h>
- #endif
- #ifdef HAVE_TIME_H
- #include <time.h>
- #endif
- #ifdef HAVE_WINSOCK_H
- #include <winsock.h>
- #endif
- #if _MSC_VER > 1300
- #include <winsock2.h>
- #include <ws2tcpip.h>
- #elif defined(_MSC_VER)
- #include <winsock.h>
- #endif
- #ifdef MS_WINDOWS
- #include <io.h>
- #include <process.h>
- #define WIN32_LEAN_AND_MEAN
- #include <windows.h>
- #define snprintf _snprintf
- #endif
- #include "../common/crypto.h"
- #include "../common/tortls.h"
- #include "../common/log.h"
- #include "../common/util.h"
- #define RECOMMENDED_SOFTWARE_VERSIONS "0.0.2pre8,0.0.2pre9,0.0.2pre10,0.0.2pre11"
- #define MAXCONNECTIONS 1000 /* upper bound on max connections.
- can be lowered by config file */
- #define MAX_BUF_SIZE (640*1024)
- #define DEFAULT_BANDWIDTH_OP (1024 * 1000)
- #define MAX_NICKNAME_LEN 32
- #define MAX_DIR_SIZE 50000 /* XXX, big enough? */
- #define ACI_TYPE_LOWER 0
- #define ACI_TYPE_HIGHER 1
- #define ACI_TYPE_BOTH 2
- #define _CONN_TYPE_MIN 3
- #define CONN_TYPE_OR_LISTENER 3
- #define CONN_TYPE_OR 4
- #define CONN_TYPE_EXIT 5
- #define CONN_TYPE_AP_LISTENER 6
- #define CONN_TYPE_AP 7
- #define CONN_TYPE_DIR_LISTENER 8
- #define CONN_TYPE_DIR 9
- #define CONN_TYPE_DNSWORKER 10
- #define CONN_TYPE_CPUWORKER 11
- #define _CONN_TYPE_MAX 11
- #define LISTENER_STATE_READY 0
- #define _DNSWORKER_STATE_MIN 1
- #define DNSWORKER_STATE_IDLE 1
- #define DNSWORKER_STATE_BUSY 2
- #define _DNSWORKER_STATE_MAX 2
- #define _CPUWORKER_STATE_MIN 1
- #define CPUWORKER_STATE_IDLE 1
- #define CPUWORKER_STATE_BUSY_ONION 2
- #define CPUWORKER_STATE_BUSY_HANDSHAKE 3
- #define _CPUWORKER_STATE_MAX 3
- #define CPUWORKER_TASK_ONION CPUWORKER_STATE_BUSY_ONION
- #define _OR_CONN_STATE_MIN 1
- #define OR_CONN_STATE_CONNECTING 1 /* waiting for connect() to finish */
- #define OR_CONN_STATE_HANDSHAKING 2 /* SSL is handshaking, not done yet */
- #define OR_CONN_STATE_OPEN 3 /* ready to send/receive cells. */
- #define _OR_CONN_STATE_MAX 3
- #define _EXIT_CONN_STATE_MIN 1
- #define EXIT_CONN_STATE_RESOLVING 1 /* waiting for response from dns farm */
- #define EXIT_CONN_STATE_CONNECTING 2 /* waiting for connect() to finish */
- #define EXIT_CONN_STATE_OPEN 3
- #define _EXIT_CONN_STATE_MAX 3
- #if 0
- #define EXIT_CONN_STATE_CLOSE 3 /* flushing the buffer, then will close */
- #define EXIT_CONN_STATE_CLOSE_WAIT 4 /* have sent a destroy, awaiting a confirmation */
- #endif
- /* the AP state values must be disjoint from the EXIT state values */
- #define _AP_CONN_STATE_MIN 4
- #define AP_CONN_STATE_SOCKS_WAIT 4
- #define AP_CONN_STATE_OR_WAIT 5
- #define AP_CONN_STATE_OPEN 6
- #define _AP_CONN_STATE_MAX 6
- #define _DIR_CONN_STATE_MIN 1
- #define DIR_CONN_STATE_CONNECTING_FETCH 1
- #define DIR_CONN_STATE_CONNECTING_UPLOAD 2
- #define DIR_CONN_STATE_CLIENT_SENDING_FETCH 3
- #define DIR_CONN_STATE_CLIENT_SENDING_UPLOAD 4
- #define DIR_CONN_STATE_CLIENT_READING_FETCH 5
- #define DIR_CONN_STATE_CLIENT_READING_UPLOAD 6
- #define DIR_CONN_STATE_SERVER_COMMAND_WAIT 7
- #define DIR_CONN_STATE_SERVER_WRITING 8
- #define _DIR_CONN_STATE_MAX 8
- #define CIRCUIT_STATE_BUILDING 0 /* I'm the OP, still haven't done all my handshakes */
- #define CIRCUIT_STATE_ONIONSKIN_PENDING 1 /* waiting to process the onionskin */
- #define CIRCUIT_STATE_OR_WAIT 2 /* I'm the OP, my firsthop is still connecting */
- #define CIRCUIT_STATE_OPEN 3 /* onionskin(s) processed, ready to send/receive cells */
- #define RELAY_COMMAND_BEGIN 1
- #define RELAY_COMMAND_DATA 2
- #define RELAY_COMMAND_END 3
- #define RELAY_COMMAND_CONNECTED 4
- #define RELAY_COMMAND_SENDME 5
- #define RELAY_COMMAND_EXTEND 6
- #define RELAY_COMMAND_EXTENDED 7
- #define RELAY_COMMAND_TRUNCATE 8
- #define RELAY_COMMAND_TRUNCATED 9
- #define RELAY_HEADER_SIZE 8
- /* default cipher function */
- #define DEFAULT_CIPHER CRYPTO_CIPHER_AES_CTR
- /* Used to en/decrypt onion skins */
- #define ONION_CIPHER DEFAULT_CIPHER
- /* Used to en/decrypt RELAY cells */
- #define CIRCUIT_CIPHER DEFAULT_CIPHER
- #define CELL_DIRECTION_IN 1
- #define CELL_DIRECTION_OUT 2
- #define EDGE_EXIT CONN_TYPE_EXIT
- #define EDGE_AP CONN_TYPE_AP
- #define CELL_DIRECTION(x) ((x) == EDGE_EXIT ? CELL_DIRECTION_IN : CELL_DIRECTION_OUT)
- #define CIRCWINDOW_START 1000
- #define CIRCWINDOW_INCREMENT 100
- #define STREAMWINDOW_START 500
- #define STREAMWINDOW_INCREMENT 50
- /* cell commands */
- #define CELL_PADDING 0
- #define CELL_CREATE 1
- #define CELL_CREATED 2
- #define CELL_RELAY 3
- #define CELL_DESTROY 4
- #define CELL_PAYLOAD_SIZE 248
- #define CELL_NETWORK_SIZE 256
- /* legal characters in a filename */
- #define CONFIG_LEGAL_FILENAME_CHARACTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_/"
- /* legal characters in a nickname */
- #define LEGAL_NICKNAME_CHARACTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
- /* structure of a socks client operation */
- typedef struct {
- unsigned char version; /* socks version number */
- unsigned char command; /* command code */
- uint16_t destport; /* destination port, host order */
- uint32_t destip; /* destination address, host order */
- /* userid follows, terminated by a \0 */
- /* dest host follows, terminated by a \0 */
- } socks4_t;
- #define SOCKS4_NETWORK_LEN 8
- typedef uint16_t aci_t;
- /* cell definition */
- typedef struct {
- aci_t aci; /* Anonymous Connection Identifier */
- unsigned char command;
- unsigned char length; /* of payload if relay cell */
- uint32_t seq; /* sequence number */
- unsigned char payload[CELL_PAYLOAD_SIZE];
- } cell_t;
- #define CELL_RELAY_COMMAND(c) (*(uint8_t*)((c).payload))
- #define SET_CELL_RELAY_COMMAND(c,cmd) (*(uint8_t*)((c).payload) = (cmd))
- #define STREAM_ID_SIZE 7
- #define SET_CELL_STREAM_ID(c,id) memcpy((c).payload+1,(id),STREAM_ID_SIZE)
- #define ZERO_STREAM "\0\0\0\0\0\0\0\0"
- typedef struct buf_t buf_t;
- struct connection_t {
- uint8_t type;
- uint8_t state;
- uint8_t wants_to_read; /* should we start reading again once
- * the bandwidth throttler allows it?
- */
- uint8_t wants_to_write; /* should we start writing again once
- * the bandwidth throttler allows reads?
- */
- int s; /* our socket */
- int poll_index; /* index of this conn into the poll_array */
- int marked_for_close; /* should we close this conn on the next
- * iteration of the main loop?
- */
- buf_t *inbuf;
- int inbuf_reached_eof; /* did read() return 0 on this conn? */
- long timestamp_lastread; /* when was the last time poll() said we could read? */
- buf_t *outbuf;
- int outbuf_flushlen; /* how much data should we try to flush from the outbuf? */
- long timestamp_lastwritten; /* when was the last time poll() said we could write? */
- long timestamp_created; /* when was this connection_t created? */
- uint32_t addr; /* these two uniquely identify a router. Both in host order. */
- uint16_t port; /* if non-zero, they identify the guy on the other end
- * of the connection. */
- char *address; /* FQDN (or IP) of the guy on the other end.
- * strdup into this, because free_connection frees it
- */
- crypto_pk_env_t *onion_pkey; /* public RSA key for the other side's onions */
- crypto_pk_env_t *link_pkey; /* public RSA key for the other side's TLS */
- crypto_pk_env_t *identity_pkey; /* public RSA key for the other side's signing */
- char *nickname;
- /* Used only by OR connections: */
- tor_tls *tls;
- uint16_t next_aci; /* Which ACI do we try to use next on this connection?
- * This is always in the range 0..1<<15-1.*/
- /* bandwidth and receiver_bucket only used by ORs in OPEN state: */
- uint32_t bandwidth; /* connection bandwidth. */
- int receiver_bucket; /* when this hits 0, stop receiving. Every second we
- * add 'bandwidth' to this, capping it at 10*bandwidth.
- */
- /* Used only by edge connections: */
- char socks_version;
- char stream_id[STREAM_ID_SIZE];
- struct connection_t *next_stream; /* points to the next stream at this edge, if any */
- struct crypt_path_t *cpath_layer; /* a pointer to which node in the circ this conn exits at */
- int package_window; /* how many more relay cells can i send into the circuit? */
- int deliver_window; /* how many more relay cells can end at me? */
- int done_sending; /* for half-open connections; not used currently */
- int done_receiving;
- };
- typedef struct connection_t connection_t;
- #define EXIT_POLICY_ACCEPT 1
- #define EXIT_POLICY_REJECT 2
- struct exit_policy_t {
- char policy_type;
- char *string;
- char *address;
- char *port;
- struct exit_policy_t *next;
- };
- /* config stuff we know about the other ORs in the network */
- typedef struct {
- char *address;
- char *nickname;
-
- uint32_t addr; /* all host order */
- uint16_t or_port;
- uint16_t ap_port;
- uint16_t dir_port;
- time_t published_on;
-
- crypto_pk_env_t *onion_pkey; /* public RSA key for onions */
- crypto_pk_env_t *link_pkey; /* public RSA key for TLS */
- crypto_pk_env_t *identity_pkey; /* public RSA key for signing */
-
- int is_running;
- /* link info */
- uint32_t bandwidth;
- struct exit_policy_t *exit_policy;
- } routerinfo_t;
- #define MAX_ROUTERS_IN_DIR 1024
- typedef struct {
- routerinfo_t **routers;
- int n_routers;
- char *software_versions;
- time_t published_on;
- } directory_t;
- struct crypt_path_t {
- /* crypto environments */
- crypto_cipher_env_t *f_crypto;
- crypto_cipher_env_t *b_crypto;
- crypto_dh_env_t *handshake_state;
- uint32_t addr;
- uint16_t port;
- uint8_t state;
- #define CPATH_STATE_CLOSED 0
- #define CPATH_STATE_AWAITING_KEYS 1
- #define CPATH_STATE_OPEN 2
- struct crypt_path_t *next;
- struct crypt_path_t *prev; /* doubly linked list */
- int package_window;
- int deliver_window;
- };
- #define DH_KEY_LEN CRYPTO_DH_SIZE
- #define DH_ONIONSKIN_LEN DH_KEY_LEN+16
- typedef struct crypt_path_t crypt_path_t;
- /* struct for a path (circuit) through the network */
- struct circuit_t {
- uint32_t n_addr;
- uint16_t n_port;
- connection_t *p_conn;
- connection_t *n_conn; /* for the OR conn, if there is one */
- connection_t *p_streams;
- connection_t *n_streams;
- int package_window;
- int deliver_window;
- aci_t p_aci; /* circuit identifiers */
- aci_t n_aci;
- crypto_cipher_env_t *p_crypto; /* used only for intermediate hops */
- crypto_cipher_env_t *n_crypto;
- crypt_path_t *cpath;
- char onionskin[DH_ONIONSKIN_LEN]; /* for storage while onionskin pending */
- long timestamp_created;
- uint8_t dirty; /* whether this circuit has been used yet */
- uint8_t state;
- void *next;
- };
- typedef struct circuit_t circuit_t;
- typedef struct {
- char *LogLevel;
- char *DataDirectory;
- char *RouterFile;
- char *Nickname;
- char *Address;
- char *ExitPolicy;
- double CoinWeight;
- int Daemon;
- int ORPort;
- int APPort;
- int DirPort;
- int MaxConn;
- int OnionRouter;
- int TrafficShaping;
- int LinkPadding;
- int IgnoreVersion;
- int DirRebuildPeriod;
- int DirFetchPostPeriod;
- int KeepalivePeriod;
- int MaxOnionsPending;
- int NewCircuitPeriod;
- int TotalBandwidth;
- int NumCpus;
- int Role;
- int loglevel;
- } or_options_t;
- /* all the function prototypes go here */
- /********************************* buffers.c ***************************/
- int find_on_inbuf(char *string, int string_len, buf_t *buf);
- buf_t *buf_new();
- buf_t *buf_new_with_capacity(size_t size);
- void buf_free(buf_t *buf);
- size_t buf_datalen(const buf_t *buf);
- size_t buf_capacity(const buf_t *buf);
- const char *_buf_peek_raw_buffer(const buf_t *buf);
- int read_to_buf(int s, int at_most, buf_t *buf, int *reached_eof);
- int read_to_buf_tls(tor_tls *tls, int at_most, buf_t *buf);
- int flush_buf(int s, buf_t *buf, int *buf_flushlen);
- int flush_buf_tls(tor_tls *tls, buf_t *buf, int *buf_flushlen);
- int write_to_buf(const char *string, int string_len, buf_t *buf);
- int fetch_from_buf(char *string, int string_len, buf_t *buf);
- int fetch_from_buf_http(buf_t *buf,
- char *headers_out, int max_headerlen,
- char *body_out, int max_bodylen);
- int fetch_from_buf_socks(buf_t *buf, char *socks_version,
- char *reply, int *replylen,
- char *addr_out, int max_addrlen,
- uint16_t *port_out);
- /********************************* circuit.c ***************************/
- void circuit_add(circuit_t *circ);
- void circuit_remove(circuit_t *circ);
- circuit_t *circuit_new(aci_t p_aci, connection_t *p_conn);
- void circuit_free(circuit_t *circ);
- circuit_t *circuit_enumerate_by_naddr_nport(circuit_t *start, uint32_t naddr, uint16_t nport);
- circuit_t *circuit_get_by_aci_conn(aci_t aci, connection_t *conn);
- circuit_t *circuit_get_by_conn(connection_t *conn);
- circuit_t *circuit_get_newest_open(void);
- int circuit_deliver_relay_cell(cell_t *cell, circuit_t *circ,
- int cell_direction, crypt_path_t *layer_hint);
- int relay_crypt(circuit_t *circ, char *in, int inlen, char cell_direction,
- crypt_path_t **layer_hint, char *recognized, connection_t **conn);
- int relay_check_recognized(circuit_t *circ, int cell_direction, char *stream, connection_t **conn);
- void circuit_resume_edge_reading(circuit_t *circ, int edge_type, crypt_path_t *layer_hint);
- int circuit_consider_stop_edge_reading(circuit_t *circ, int edge_type, crypt_path_t *layer_hint);
- int circuit_consider_sending_sendme(circuit_t *circ, int edge_type, crypt_path_t *layer_hint);
- void circuit_close(circuit_t *circ);
- void circuit_about_to_close_connection(connection_t *conn);
- void circuit_dump_by_conn(connection_t *conn);
- void circuit_expire_unused_circuits(void);
- void circuit_launch_new(int failure_status);
- int circuit_establish_circuit(void);
- void circuit_n_conn_open(connection_t *or_conn);
- int circuit_send_next_onion_skin(circuit_t *circ);
- int circuit_extend(cell_t *cell, circuit_t *circ);
- int circuit_finish_handshake(circuit_t *circ, char *reply);
- int circuit_truncated(circuit_t *circ, crypt_path_t *layer);
- void assert_cpath_ok(const crypt_path_t *c);
- void assert_cpath_layer_ok(const crypt_path_t *c);
- void assert_circuit_ok(const circuit_t *c);
- extern unsigned long stats_n_relay_cells_relayed;
- extern unsigned long stats_n_relay_cells_delivered;
- /********************************* command.c ***************************/
- void command_process_cell(cell_t *cell, connection_t *conn);
- extern unsigned long stats_n_padding_cells_processed;
- extern unsigned long stats_n_create_cells_processed;
- extern unsigned long stats_n_created_cells_processed;
- extern unsigned long stats_n_relay_cells_processed;
- extern unsigned long stats_n_destroy_cells_processed;
- /********************************* config.c ***************************/
- int getconfig(int argc, char **argv, or_options_t *options);
- /********************************* connection.c ***************************/
- connection_t *connection_new(int type);
- void connection_free(connection_t *conn);
- int connection_create_listener(struct sockaddr_in *bindaddr, int type);
- int connection_handle_listener_read(connection_t *conn, int new_type);
- int connection_connect(connection_t *conn, char *address, uint32_t addr, uint16_t port);
- int retry_all_connections(uint16_t or_listenport, uint16_t ap_listenport, uint16_t dir_listenport);
- int connection_handle_read(connection_t *conn);
- int connection_read_to_buf(connection_t *conn);
- int connection_fetch_from_buf(char *string, int len, connection_t *conn);
- int connection_find_on_inbuf(char *string, int len, connection_t *conn);
- int connection_wants_to_flush(connection_t *conn);
- int connection_outbuf_too_full(connection_t *conn);
- int connection_flush_buf(connection_t *conn);
- int connection_handle_write(connection_t *conn);
- void connection_write_to_buf(const char *string, int len, connection_t *conn);
- connection_t *connection_twin_get_by_addr_port(uint32_t addr, uint16_t port);
- connection_t *connection_exact_get_by_addr_port(uint32_t addr, uint16_t port);
- connection_t *connection_get_by_type(int type);
- connection_t *connection_get_by_type_state(int type, int state);
- connection_t *connection_get_by_type_state_lastwritten(int type, int state);
- int connection_receiver_bucket_should_increase(connection_t *conn);
- #define connection_speaks_cells(conn) ((conn)->type == CONN_TYPE_OR)
- int connection_is_listener(connection_t *conn);
- int connection_state_is_open(connection_t *conn);
- int connection_send_destroy(aci_t aci, connection_t *conn);
- int connection_process_inbuf(connection_t *conn);
- int connection_finished_flushing(connection_t *conn);
- void assert_connection_ok(connection_t *conn, time_t now);
- /********************************* connection_edge.c ***************************/
- int connection_edge_process_inbuf(connection_t *conn);
- void connection_edge_send_command(connection_t *fromconn, circuit_t *circ, int relay_command,
- void *payload, int payload_len, crypt_path_t *cpath_layer);
- int connection_edge_process_relay_cell(cell_t *cell, circuit_t *circ, connection_t *conn,
- int edge_type, crypt_path_t *layer_hint);
- int connection_edge_finished_flushing(connection_t *conn);
- int connection_package_raw_inbuf(connection_t *conn);
- void connection_consider_sending_sendme(connection_t *conn, int edge_type);
- int connection_exit_connect(connection_t *conn);
- extern uint64_t stats_n_data_cells_packaged;
- extern uint64_t stats_n_data_bytes_packaged;
- extern uint64_t stats_n_data_cells_received;
- extern uint64_t stats_n_data_bytes_received;
- /********************************* connection_or.c ***************************/
- int connection_or_process_inbuf(connection_t *conn);
- int connection_or_finished_flushing(connection_t *conn);
- void connection_or_init_conn_from_router(connection_t *conn, routerinfo_t *router);
- connection_t *connection_or_connect(routerinfo_t *router);
- int connection_tls_start_handshake(connection_t *conn, int receiving);
- int connection_tls_continue_handshake(connection_t *conn);
- void connection_write_cell_to_buf(const cell_t *cellp, connection_t *conn);
- int connection_process_cell_from_inbuf(connection_t *conn);
- /********************************* cpuworker.c *****************************/
- void cpu_init(void);
- int connection_cpu_finished_flushing(connection_t *conn);
- int connection_cpu_process_inbuf(connection_t *conn);
- int cpuworker_main(void *data);
- int assign_to_cpuworker(connection_t *cpuworker, unsigned char question_type,
- void *task);
- /********************************* directory.c ***************************/
- void directory_initiate_command(routerinfo_t *router, int command);
- int connection_dir_process_inbuf(connection_t *conn);
- int connection_dir_finished_flushing(connection_t *conn);
- /********************************* dns.c ***************************/
- void dns_init(void);
- int connection_dns_finished_flushing(connection_t *conn);
- int connection_dns_process_inbuf(connection_t *conn);
- void dns_cancel_pending_resolve(char *question, connection_t *onlyconn);
- int dns_resolve(connection_t *exitconn);
- /********************************* main.c ***************************/
- void set_onion_key(crypto_pk_env_t *k);
- crypto_pk_env_t *get_onion_key(void);
- void set_identity_key(crypto_pk_env_t *k);
- crypto_pk_env_t *get_identity_key(void);
- crypto_pk_env_t *get_link_key(void);
- int connection_add(connection_t *conn);
- int connection_remove(connection_t *conn);
- void connection_set_poll_socket(connection_t *conn);
- void get_connection_array(connection_t ***array, int *n);
- void connection_watch_events(connection_t *conn, short events);
- int connection_is_reading(connection_t *conn);
- void connection_stop_reading(connection_t *conn);
- void connection_start_reading(connection_t *conn);
- void connection_stop_writing(connection_t *conn);
- void connection_start_writing(connection_t *conn);
- const char *router_get_my_descriptor(void);
- int main(int argc, char *argv[]);
- /********************************* onion.c ***************************/
- int decide_aci_type(char *local_nick, char *remote_nick);
- int onion_pending_add(circuit_t *circ);
- circuit_t *onion_next_task(void);
- void onion_pending_remove(circuit_t *circ);
- int onionskin_answer(circuit_t *circ, unsigned char *payload, unsigned char *keys);
- crypt_path_t *onion_generate_cpath(routerinfo_t **firsthop);
- int onion_skin_create(crypto_pk_env_t *router_key,
- crypto_dh_env_t **handshake_state_out,
- char *onion_skin_out); /* Must be DH_ONIONSKIN_LEN bytes long */
- int onion_skin_server_handshake(char *onion_skin, /* DH_ONIONSKIN_LEN bytes long */
- crypto_pk_env_t *private_key,
- char *handshake_reply_out, /* DH_KEY_LEN bytes long */
- char *key_out,
- int key_out_len);
- int onion_skin_client_handshake(crypto_dh_env_t *handshake_state,
- char *handshake_reply,/* Must be DH_KEY_LEN bytes long*/
- char *key_out,
- int key_out_len);
- /********************************* routers.c ***************************/
- int learn_my_address(struct sockaddr_in *me);
- void router_retry_connections(void);
- routerinfo_t *router_pick_directory_server(void);
- void router_upload_desc_to_dirservers(void);
- routerinfo_t *router_get_by_addr_port(uint32_t addr, uint16_t port);
- routerinfo_t *router_get_by_link_pk(crypto_pk_env_t *pk);
- routerinfo_t *router_get_by_nickname(char *nickname);
- void router_get_directory(directory_t **pdirectory);
- int router_is_me(uint32_t addr, uint16_t port);
- void router_mark_as_down(char *nickname);
- int router_get_list_from_file(char *routerfile);
- int router_get_router_hash(char *s, char *digest);
- int router_get_dir_hash(char *s, char *digest);
- /* Reads a list of known routers, unsigned. */
- int router_get_list_from_string(char *s);
- /* Exported for debugging */
- int router_get_list_from_string_impl(char **s, directory_t **dest, int n_good_nicknames, const char *good_nickname_lst[]);
- /* Reads a signed directory. */
- int router_get_dir_from_string(char *s, crypto_pk_env_t *pkey);
- /* Exported or debugging */
- int router_get_dir_from_string_impl(char *s, directory_t **dest,
- crypto_pk_env_t *pkey);
- routerinfo_t *router_get_entry_from_string(char **s);
- int router_compare_to_exit_policy(connection_t *conn);
- void routerinfo_free(routerinfo_t *router);
- int router_dump_router_to_string(char *s, int maxlen, routerinfo_t *router,
- crypto_pk_env_t *ident_key);
- const routerinfo_t *router_get_desc_routerinfo(void);
- const char *router_get_my_descriptor(void);
- int router_rebuild_descriptor(void);
- /********************************* dirserv.c ***************************/
- int dirserv_add_own_fingerprint(const char *nickname, crypto_pk_env_t *pk);
- int dirserv_parse_fingerprint_file(const char *fname);
- int dirserv_router_fingerprint_is_known(const routerinfo_t *router);
- void dirserv_free_fingerprint_list();
- int dirserv_add_descriptor(const char **desc);
- int dirserv_init_from_directory_string(const char *dir);
- void dirserv_free_descriptors();
- int dirserv_dump_directory_to_string(char *s, int maxlen,
- crypto_pk_env_t *private_key);
- void directory_set_dirty();
- size_t dirserv_get_directory(const char **cp);
- #endif
- /*
- Local Variables:
- mode:c
- indent-tabs-mode:nil
- c-basic-offset:2
- End:
- */
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