/* Copyright 2001,2002,2003 Roger Dingledine, Matej Pfajfar. */ /* See LICENSE for licensing information */ /* $Id$ */ #ifndef __OR_H #define __OR_H #include "orconfig.h" #include #include #include #ifdef HAVE_UNISTD_H #include #endif #ifdef HAVE_STRING_H #include #endif #ifdef HAVE_SIGNAL_H #include #endif #ifdef HAVE_NETDB_H #include #endif #ifdef HAVE_CTYPE_H #include #endif #include "../common/torint.h" #include "../common/fakepoll.h" #ifdef HAVE_SYS_TYPES_H #include /* Must be included before sys/stat.h for Ultrix */ #endif #ifdef HAVE_SYS_WAIT_H #include #endif #ifdef HAVE_SYS_FCNTL_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_SYS_IOCTL_H #include #endif #ifdef HAVE_SYS_SOCKET_H #include #endif #ifdef HAVE_SYS_TIME_H #include #endif #ifdef HAVE_SYS_STAT_H #include #endif #ifdef HAVE_NETINET_IN_H #include #endif #ifdef HAVE_ARPA_INET_H #include #endif #ifdef HAVE_ERRNO_H #include #endif #ifdef HAVE_ASSERT_H #include #endif #ifdef HAVE_TIME_H #include #endif #ifdef HAVE_PWD_H #include #endif #ifdef HAVE_GRP_H #include #endif #ifdef HAVE_WINSOCK_H #include #endif #if _MSC_VER > 1300 #include #include #elif defined(_MSC_VER) #include #endif #ifdef MS_WINDOWS #include #include #define WIN32_LEAN_AND_MEAN #include #define snprintf _snprintf #endif #include "../common/crypto.h" #include "../common/tortls.h" #include "../common/log.h" #include "../common/util.h" #define MAXCONNECTIONS 1000 /* upper bound on max connections. can be lowered by config file */ #define DEFAULT_BANDWIDTH_OP (1024 * 1000) #define MAX_NICKNAME_LEN 32 #define MAX_DIR_SIZE 500000 #ifdef TOR_PERF #define MAX_DNS_ENTRY_AGE (150*60) #else #define MAX_DNS_ENTRY_AGE (15*60) #endif #define CIRC_ID_TYPE_LOWER 0 #define CIRC_ID_TYPE_HIGHER 1 #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_CIRCUIT_WAIT 5 #define AP_CONN_STATE_CONNECTING 6 #define AP_CONN_STATE_OPEN 7 #define _AP_CONN_STATE_MAX 7 #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_COMMAND_DROP 10 #define END_STREAM_REASON_MISC 1 #define END_STREAM_REASON_RESOLVEFAILED 2 #define END_STREAM_REASON_CONNECTFAILED 3 #define END_STREAM_REASON_EXITPOLICY 4 #define END_STREAM_REASON_DESTROY 5 #define END_STREAM_REASON_DONE 6 /* 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) #ifdef TOR_PERF #define CIRCWINDOW_START 10000 #define CIRCWINDOW_INCREMENT 1000 #define STREAMWINDOW_START 5000 #define STREAMWINDOW_INCREMENT 500 #else #define CIRCWINDOW_START 1000 #define CIRCWINDOW_INCREMENT 100 #define STREAMWINDOW_START 500 #define STREAMWINDOW_INCREMENT 50 #endif /* cell commands */ #define CELL_PADDING 0 #define CELL_CREATE 1 #define CELL_CREATED 2 #define CELL_RELAY 3 #define CELL_DESTROY 4 /* legal characters in a filename */ #define CONFIG_LEGAL_FILENAME_CHARACTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_/" /* legal characters in a nickname */ #define LEGAL_NICKNAME_CHARACTERS "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" #define SOCKS4_NETWORK_LEN 8 /* * Relay payload: * Relay command [1 byte] * Recognized [2 bytes] * Stream ID [2 bytes] * Partial SHA-1 [4 bytes] * Length [2 bytes] * Relay payload [498 bytes] */ #if 0 #define CELL_RELAY_COMMAND(c) (*(uint8_t*)((c).payload)) #define SET_CELL_RELAY_COMMAND(c,cmd) (*(uint8_t*)((c).payload) = (cmd)) #define CELL_RELAY_RECOGNIZED(c) (ntohs(*(uint16_t*)((c).payload+1))) #define SET_CELL_RELAY_RECOGNIZED(c,r) (*(uint16_t*)((c).payload+1) = htons(r)) #define STREAM_ID_SIZE 2 //#define SET_CELL_STREAM_ID(c,id) memcpy((c).payload+1,(id),STREAM_ID_SIZE) #define CELL_RELAY_STREAM_ID(c) (ntohs(*(uint16_t*)((c).payload+3))) #define SET_CELL_RELAY_STREAM_ID(c,id) (*(uint16_t*)((c).payload+3) = htons(id)) #define ZERO_STREAM 0 /* integrity is the first 32 bits (in network order) of a sha-1 of all * cell payloads that are relay cells that have been sent / delivered * to the hop on the * circuit (the integrity is zeroed while doing * each calculation) */ #define CELL_RELAY_INTEGRITY(c) (ntohl(*(uint32_t*)((c).payload+5))) #define SET_CELL_RELAY_INTEGRITY(c,i) (*(uint32_t*)((c).payload+5) = htonl(i)) /* relay length is how many bytes are used in the cell payload past relay_header_size */ #define CELL_RELAY_LENGTH(c) (ntohs(*(uint16_t*)((c).payload+9))) #define SET_CELL_RELAY_LENGTH(c,len) (*(uint16_t*)((c).payload+9) = htons(len)) #endif #define CELL_PAYLOAD_SIZE 509 #define CELL_NETWORK_SIZE 512 #define RELAY_HEADER_SIZE (1+2+2+4+2) #define RELAY_PAYLOAD_SIZE (CELL_PAYLOAD_SIZE-RELAY_HEADER_SIZE) /* cell definition */ typedef struct { uint16_t circ_id; unsigned char command; unsigned char payload[CELL_PAYLOAD_SIZE]; } cell_t; typedef struct { uint8_t command; uint16_t recognized; uint16_t stream_id; char integrity[4]; uint16_t length; } relay_header_t; typedef struct buf_t buf_t; typedef struct socks_request_t socks_request_t; #define CONNECTION_MAGIC 0x7C3C304Eu struct connection_t { uint32_t magic; /* for memory debugging */ 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? */ time_t 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? */ time_t timestamp_lastwritten; /* when was the last time poll() said we could write? */ time_t 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_circ_id; /* Which circ_id 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: */ uint16_t stream_id; 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; char has_sent_end; /* for debugging: set once we've set the stream end, and check in circuit_about_to_close_connection() */ /* Used only by AP connections */ socks_request_t *socks_request; }; 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; uint32_t addr; uint32_t msk; uint16_t prt_min; uint16_t prt_max; 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 socks_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 bandwidthrate; uint32_t bandwidthburst; 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; } routerlist_t; struct crypt_path_t { /* crypto environments */ crypto_cipher_env_t *f_crypto; crypto_cipher_env_t *b_crypto; crypto_digest_env_t *f_digest; /* for integrity checking */ crypto_digest_env_t *b_digest; 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 ONIONSKIN_CHALLENGE_LEN (16+DH_KEY_LEN) #define ONIONSKIN_REPLY_LEN (DH_KEY_LEN+20) typedef struct crypt_path_t crypt_path_t; typedef struct { int desired_path_len; char *chosen_exit; /* nickname of planned exit node */ } cpath_build_state_t; /* struct for a path (circuit) through the network */ #define CIRCUIT_MAGIC 0x35315243u struct circuit_t { uint32_t magic; /* for memory debugging. */ 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; uint16_t next_stream_id; int package_window; int deliver_window; uint16_t p_circ_id; /* circuit identifiers */ uint16_t n_circ_id; crypto_cipher_env_t *p_crypto; /* used only for intermediate hops */ crypto_cipher_env_t *n_crypto; crypto_digest_env_t *p_digest; /* for integrity checking, */ crypto_digest_env_t *n_digest; /* intermediate hops only */ cpath_build_state_t *build_state; crypt_path_t *cpath; char onionskin[ONIONSKIN_CHALLENGE_LEN]; /* for storage while onionskin pending */ time_t timestamp_created; time_t timestamp_dirty; /* when the circuit was first used, or 0 if clean */ uint8_t state; void *next; }; typedef struct circuit_t circuit_t; typedef struct { char *LogLevel; char *LogFile; char *DebugLogFile; char *DataDirectory; char *RouterFile; char *Nickname; char *Address; char *PidFile; char *ExitNodes; char *EntryNodes; char *ExcludedNodes; char *ExitPolicy; char *SocksBindAddress; char *ORBindAddress; char *DirBindAddress; char *RecommendedVersions; char *User; char *Group; double PathlenCoinWeight; int ORPort; int SocksPort; int DirPort; int MaxConn; int TrafficShaping; int LinkPadding; int IgnoreVersion; int RunAsDaemon; int DirRebuildPeriod; int DirFetchPostPeriod; int KeepalivePeriod; int MaxOnionsPending; int NewCircuitPeriod; int BandwidthRate; int BandwidthBurst; int NumCpus; int loglevel; } or_options_t; /* XXX are these good enough defaults? */ #define MAX_SOCKS_REPLY_LEN 1024 #define MAX_SOCKS_ADDR_LEN 256 struct socks_request_t { char socks_version; int replylen; char reply[MAX_SOCKS_REPLY_LEN]; char address[MAX_SOCKS_ADDR_LEN]; uint16_t port; }; /* 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, socks_request_t *req); /********************************* circuit.c ***************************/ void circuit_add(circuit_t *circ); void circuit_remove(circuit_t *circ); circuit_t *circuit_new(uint16_t p_circ_id, connection_t *p_conn); void circuit_free(circuit_t *circ); void circuit_free_cpath(crypt_path_t *cpath); circuit_t *circuit_get_by_circ_id_conn(uint16_t circ_id, connection_t *conn); circuit_t *circuit_get_by_conn(connection_t *conn); circuit_t *circuit_get_newest(connection_t *conn, int must_be_open); void circuit_expire_building(void); int circuit_count_building(void); int circuit_stream_is_being_handled(connection_t *conn); int circuit_receive_relay_cell(cell_t *cell, circuit_t *circ, int cell_direction); int circuit_package_relay_cell(cell_t *cell, circuit_t *circ, int cell_direction, crypt_path_t *layer_hint); 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); void circuit_consider_sending_sendme(circuit_t *circ, int edge_type, crypt_path_t *layer_hint); void circuit_close(circuit_t *circ); void circuit_detach_stream(circuit_t *circ, connection_t *conn); void circuit_about_to_close_connection(connection_t *conn); void circuit_log_path(int severity, circuit_t *circ); void circuit_dump_by_conn(connection_t *conn, int severity); void circuit_expire_unused_circuits(void); int circuit_launch_new(void); void circuit_increment_failure_count(void); void circuit_reset_failure_count(void); 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); void connection_free_all(void); int connection_create_listener(char *bindaddress, uint16_t bindport, int type); int connection_connect(connection_t *conn, char *address, uint32_t addr, uint16_t port); int retry_all_connections(void); 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_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) #define connection_has_pending_tls_data(conn) \ ((conn)->type == CONN_TYPE_OR && \ (conn)->state == OR_CONN_STATE_OPEN && \ tor_tls_get_pending_bytes(conn->tls)) int connection_is_listener(connection_t *conn); int connection_state_is_open(connection_t *conn); int connection_send_destroy(uint16_t circ_id, 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 ***************************/ void relay_header_pack(char *dest, const relay_header_t *src); void relay_header_unpack(relay_header_t *dest, const char *src); int connection_edge_process_inbuf(connection_t *conn); int connection_edge_end(connection_t *conn, char reason, crypt_path_t *cpath_layer); int 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_edge_package_raw_inbuf(connection_t *conn); void connection_exit_connect(connection_t *conn); int connection_ap_can_use_exit(connection_t *conn, routerinfo_t *exit); void connection_ap_expire_beginning(void); void connection_ap_attach_pending(void); 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; void client_dns_init(void); void client_dns_clean(void); /********************************* 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_or_write_cell_to_buf(const cell_t *cell, 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 ***************************/ 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); int main(int argc, char *argv[]); /********************************* onion.c ***************************/ int decide_circ_id_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); int onion_extend_cpath(crypt_path_t **head_ptr, cpath_build_state_t *state, routerinfo_t **router_out); int onion_skin_create(crypto_pk_env_t *router_key, crypto_dh_env_t **handshake_state_out, char *onion_skin_out); int onion_skin_server_handshake(char *onion_skin, crypto_pk_env_t *private_key, char *handshake_reply_out, char *key_out, int key_out_len); int onion_skin_client_handshake(crypto_dh_env_t *handshake_state, char *handshake_reply, char *key_out, int key_out_len); cpath_build_state_t *onion_new_cpath_build_state(void); /********************************* router.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 init_keys(void); void router_retry_connections(void); void router_upload_desc_to_dirservers(void); int router_compare_to_my_exit_policy(connection_t *conn); const char *router_get_my_descriptor(void); int router_rebuild_descriptor(void); int router_dump_router_to_string(char *s, int maxlen, routerinfo_t *router, crypto_pk_env_t *ident_key); /********************************* routerlist.c ***************************/ routerinfo_t *router_pick_directory_server(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_routerlist(routerlist_t **prouterlist); void routerinfo_free(routerinfo_t *router); void router_mark_as_down(char *nickname); int router_set_routerlist_from_file(char *routerfile); int router_set_routerlist_from_string(const char *s); int router_get_dir_hash(const char *s, char *digest); int router_get_router_hash(const char *s, char *digest); int router_set_routerlist_from_directory(const char *s, crypto_pk_env_t *pkey); routerinfo_t *router_get_entry_from_string(const char **s); int router_add_exit_policy_from_string(routerinfo_t *router, const char *s); int router_compare_addr_to_exit_policy(uint32_t addr, uint16_t port, struct exit_policy_t *policy); #define ADDR_POLICY_ACCEPTED 0 #define ADDR_POLICY_REJECTED -1 #define ADDR_POLICY_UNKNOWN 1 int router_exit_policy_all_routers_reject(uint32_t addr, uint16_t port); int router_exit_policy_rejects_all(routerinfo_t *router); /********************************* 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: */