X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/d6746a0b2a8c85d96b71e0a325ce41461ae15464..c9d0ad9bcc6ae98c544f29d84972c11745179078:/channels.h diff --git a/channels.h b/channels.h index 419b6362..840268fc 100644 --- a/channels.h +++ b/channels.h @@ -10,7 +10,7 @@ * called by a name other than "ssh" or "Secure Shell". */ /* - * Copyright (c) 2000 Markus Friedl. All rights reserved. + * Copyright (c) 1999, 2000, 2001 Markus Friedl. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -32,7 +32,7 @@ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* RCSID("$OpenBSD: channels.h,v 1.39 2001/06/20 13:56:39 markus Exp $"); */ +/* RCSID("$OpenBSD: channels.h,v 1.53 2001/11/29 21:10:51 stevesk Exp $"); */ #ifndef CHANNEL_H #define CHANNEL_H @@ -56,23 +56,18 @@ #define SSH_CHANNEL_ZOMBIE 14 /* Almost dead. */ #define SSH_CHANNEL_MAX_TYPE 15 -#define SSH_CHANNEL_PATH_LEN 30 +#define SSH_CHANNEL_PATH_LEN 256 -/* - * Data structure for channel data. This is initialized in channel_new - * and cleared in channel_free. - */ struct Channel; typedef struct Channel Channel; -typedef void channel_callback_fn(int id, void *arg); -typedef int channel_filter_fn(struct Channel *c, char *buf, int len); +typedef void channel_callback_fn(int, void *); +typedef int channel_filter_fn(struct Channel *, char *, int); struct Channel { int type; /* channel type/state */ int self; /* my own channel identifier */ int remote_id; /* channel identifier for remote peer */ - /* peer can be reached over encrypted connection, via packet-sent */ int istate; /* input from channel (state of receive half) */ int ostate; /* output to channel (state of transmit half) */ int flags; /* close sent/rcvd */ @@ -81,6 +76,8 @@ struct Channel { int efd; /* extended fd */ int sock; /* sock fd */ int isatty; /* rfd is a tty */ + int force_drain; /* force close on iEOF */ + int delayed; /* fdset hack */ Buffer input; /* data read from socket, to be sent over * encrypted connection */ Buffer output; /* data received over encrypted connection for @@ -106,7 +103,7 @@ struct Channel { channel_callback_fn *cb_fn; void *cb_arg; int cb_event; - channel_callback_fn *dettach_user; + channel_callback_fn *detach_user; /* filter */ channel_filter_fn *input_filter; @@ -139,97 +136,89 @@ struct Channel { #define CHAN_CLOSE_SENT 0x01 #define CHAN_CLOSE_RCVD 0x02 - /* channel management */ -Channel *channel_lookup(int id); -Channel * -channel_new(char *ctype, int type, int rfd, int wfd, int efd, - int window, int maxpack, int extusage, char *remote_name, int nonblock); -void -channel_set_fds(int id, int rfd, int wfd, int efd, - int extusage, int nonblock); -void channel_free(Channel *c); -void channel_free_all(void); - -void channel_send_open(int id); -void channel_request(int id, char *service, int wantconfirm); -void channel_request_start(int id, char *service, int wantconfirm); -void channel_register_callback(int id, int mtype, channel_callback_fn *fn, void *arg); -void channel_register_cleanup(int id, channel_callback_fn *fn); -void channel_register_filter(int id, channel_filter_fn *fn); -void channel_cancel_cleanup(int id); +Channel *channel_lookup(int); +Channel *channel_new(char *, int, int, int, int, int, int, int, char *, int); +void channel_set_fds(int, int, int, int, int, int); +void channel_free(Channel *); +void channel_free_all(void); +void channel_stop_listening(void); + +void channel_send_open(int); +void channel_request(int, char *, int); +void channel_request_start(int, char *, int); +void channel_register_callback(int, int mtype, channel_callback_fn *, void *); +void channel_register_cleanup(int, channel_callback_fn *); +void channel_register_filter(int, channel_filter_fn *); +void channel_cancel_cleanup(int); +int channel_close_fd(int *); /* protocol handler */ -void channel_input_channel_request(int type, int plen, void *ctxt); -void channel_input_close(int type, int plen, void *ctxt); -void channel_input_close_confirmation(int type, int plen, void *ctxt); -void channel_input_data(int type, int plen, void *ctxt); -void channel_input_extended_data(int type, int plen, void *ctxt); -void channel_input_ieof(int type, int plen, void *ctxt); -void channel_input_oclose(int type, int plen, void *ctxt); -void channel_input_open_confirmation(int type, int plen, void *ctxt); -void channel_input_open_failure(int type, int plen, void *ctxt); -void channel_input_port_open(int type, int plen, void *ctxt); -void channel_input_window_adjust(int type, int plen, void *ctxt); +void channel_input_channel_request(int, int, void *); +void channel_input_close(int, int, void *); +void channel_input_close_confirmation(int, int, void *); +void channel_input_data(int, int, void *); +void channel_input_extended_data(int, int, void *); +void channel_input_ieof(int, int, void *); +void channel_input_oclose(int, int, void *); +void channel_input_open_confirmation(int, int, void *); +void channel_input_open_failure(int, int, void *); +void channel_input_port_open(int, int, void *); +void channel_input_window_adjust(int, int, void *); /* file descriptor handling (read/write) */ -void -channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp, - int rekeying); -void channel_after_select(fd_set * readset, fd_set * writeset); -void channel_output_poll(void); - -int channel_not_very_much_buffered_data(void); -void channel_close_all(void); -void channel_free_all(void); -int channel_still_open(void); -char *channel_open_message(void); -int channel_find_open(void); - -/* channel_tcpfwd.c */ -int -channel_request_local_forwarding(u_short listen_port, - const char *host_to_connect, u_short port_to_connect, int gateway_ports); +void channel_prepare_select(fd_set **, fd_set **, int *, int*, int); +void channel_after_select(fd_set *, fd_set *); +void channel_output_poll(void); + +int channel_not_very_much_buffered_data(void); +void channel_close_all(void); +int channel_still_open(void); +char *channel_open_message(void); +int channel_find_open(void); + +/* tcp forwarding */ +void channel_set_af(int af); +void channel_permit_all_opens(void); +void channel_add_permitted_opens(char *, int); +void channel_clear_permitted_opens(void); +void channel_input_port_forward_request(int, int); +int channel_connect_to(const char *, u_short); +int channel_connect_by_listen_address(u_short); +void channel_request_remote_forwarding(u_short, const char *, u_short); +int channel_request_local_forwarding(u_short, const char *, u_short, int); int -channel_request_forwarding(const char *listen_address, u_short listen_port, - const char *host_to_connect, u_short port_to_connect, int gateway_ports, - int remote_fwd); -void -channel_request_remote_forwarding(u_short port, const char *host, - u_short remote_port); -void channel_permit_all_opens(void); -void channel_add_permitted_opens(char *host, int port); -void channel_clear_permitted_opens(void); -void channel_input_port_forward_request(int is_root, int gateway_ports); -int channel_connect_to(const char *host, u_short host_port); -int channel_connect_by_listen_adress(u_short listen_port); +channel_request_forwarding(const char *, u_short, const char *, u_short, int, + int); /* x11 forwarding */ -int x11_connect_display(void); -char *x11_create_display(int screen); -char *x11_create_display_inet(int screen, int x11_display_offset); -void x11_input_open(int type, int plen, void *ctxt); -void x11_request_forwarding(void); -void -x11_request_forwarding_with_spoofing(int client_session_id, - const char *proto, const char *data); -void deny_input_open(int type, int plen, void *ctxt); +int x11_connect_display(void); +int x11_create_display_inet(int, int); +void x11_input_open(int, int, void *); +void x11_request_forwarding(void); +void x11_request_forwarding_with_spoofing(int, const char *, const char *); +void deny_input_open(int, int, void *); /* agent forwarding */ -void auth_request_forwarding(void); -char *auth_get_socket_name(void); -void auth_sock_cleanup_proc(void *pw); -int auth_input_request_forwarding(struct passwd * pw); -void auth_input_open_request(int type, int plen, void *ctxt); +void auth_request_forwarding(void); +char *auth_get_socket_name(void); +void auth_sock_cleanup_proc(void *); +int auth_input_request_forwarding(struct passwd *); +void auth_input_open_request(int, int, void *); /* channel close */ -typedef void chan_event_fn(Channel * c); +int chan_is_dead(Channel *, int); +void chan_mark_dead(Channel *); +void chan_init_iostates(Channel *); +void chan_init(void); + +typedef void chan_event_fn(Channel *); /* for the input state */ extern chan_event_fn *chan_rcvd_oclose; @@ -241,9 +230,4 @@ extern chan_event_fn *chan_rcvd_ieof; extern chan_event_fn *chan_write_failed; extern chan_event_fn *chan_obuf_empty; -int chan_is_dead(Channel * c); -void chan_mark_dead(Channel * c); -void chan_init_iostates(Channel * c); -void chan_init(void); - #endif