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Diff for /src/usr.bin/ssh/channels.h between version 1.50 and 1.50.2.5

version 1.50, 2001/10/10 22:18:47

version 1.50.2.5, 2002/06/26 18:22:34

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/* $OpenBSD$ */

* Author: Tatu Ylonen <ylo@cs.hut.fi>

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* called by a name other than "ssh" or "Secure Shell".

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

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* (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("$OpenBSD$"); */

#ifndef CHANNEL_H

#define CHANNEL_H

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#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

struct Channel;

typedef struct Channel Channel;

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int type; /* channel type/state */

int self; /* my own channel identifier */

int remote_id; /* channel identifier for remote peer */

int istate; /* input from channel (state of receive half) */

u_int istate; /* input from channel (state of receive half) */

int ostate; /* output to channel (state of transmit half) */

u_int ostate; /* output to channel (state of transmit half) */

int flags; /* close sent/rcvd */

int rfd; /* read fd */

int wfd; /* write fd */

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int host_port; /* remote port to connect for forwards */

char *remote_name; /* remote hostname */

int remote_window;

u_int remote_window;

int remote_maxpacket;

u_int remote_maxpacket;

int local_window;

u_int local_window;

int local_window_max;

u_int local_window_max;

int local_consumed;

u_int local_consumed;

int local_maxpacket;

u_int local_maxpacket;

int extended_usage;

int single_connection;

char *ctype; /* type */

/* callback */

channel_callback_fn *cb_fn;

channel_callback_fn *confirm;

void *cb_arg;

int cb_event;

channel_callback_fn *detach_user;

/* filter */

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#define CHAN_EXTENDED_WRITE 2

/* default window/packet sizes for tcp/x11-fwd-channel */

#define CHAN_SES_WINDOW_DEFAULT (32*1024)

#define CHAN_SES_PACKET_DEFAULT (32*1024)

#define CHAN_SES_PACKET_DEFAULT (CHAN_SES_WINDOW_DEFAULT/2)

#define CHAN_SES_WINDOW_DEFAULT (4*CHAN_SES_PACKET_DEFAULT)

#define CHAN_TCP_WINDOW_DEFAULT (32*1024)

#define CHAN_TCP_PACKET_DEFAULT (32*1024)

#define CHAN_TCP_PACKET_DEFAULT (CHAN_TCP_WINDOW_DEFAULT/2)

#define CHAN_TCP_WINDOW_DEFAULT (4*CHAN_TCP_PACKET_DEFAULT)

#define CHAN_X11_WINDOW_DEFAULT (4*1024)

#define CHAN_X11_PACKET_DEFAULT (16*1024)

#define CHAN_X11_PACKET_DEFAULT (CHAN_X11_WINDOW_DEFAULT/2)

#define CHAN_X11_WINDOW_DEFAULT (4*CHAN_X11_PACKET_DEFAULT)

/* possible input states */

#define CHAN_INPUT_OPEN 0x01

#define CHAN_INPUT_OPEN 0

#define CHAN_INPUT_WAIT_DRAIN 0x02

#define CHAN_INPUT_WAIT_DRAIN 1

#define CHAN_INPUT_WAIT_OCLOSE 0x04

#define CHAN_INPUT_WAIT_OCLOSE 2

#define CHAN_INPUT_CLOSED 0x08

#define CHAN_INPUT_CLOSED 3

/* possible output states */

#define CHAN_OUTPUT_OPEN 0x10

#define CHAN_OUTPUT_OPEN 0

#define CHAN_OUTPUT_WAIT_DRAIN 0x20

#define CHAN_OUTPUT_WAIT_DRAIN 1

#define CHAN_OUTPUT_WAIT_IEOF 0x40

#define CHAN_OUTPUT_WAIT_IEOF 2

#define CHAN_OUTPUT_CLOSED 0x80

#define CHAN_OUTPUT_CLOSED 3

#define CHAN_CLOSE_SENT 0x01

#define CHAN_CLOSE_RCVD 0x02

#define CHAN_EOF_SENT 0x04

#define CHAN_EOF_RCVD 0x08

/* check whether 'efd' is still in use */

#define CHANNEL_EFD_INPUT_ACTIVE(c) \

(compat20 && c->extended_usage == CHAN_EXTENDED_READ && \

(c->efd != -1 || \

buffer_len(&c->extended) > 0))

#define CHANNEL_EFD_OUTPUT_ACTIVE(c) \

(compat20 && c->extended_usage == CHAN_EXTENDED_WRITE && \

((c->efd != -1 && !(c->flags & (CHAN_EOF_RCVD|CHAN_CLOSE_RCVD))) || \

buffer_len(&c->extended) > 0))

/* channel management */

Channel *channel_lookup(int);

Channel *channel_new(char *, int, int, int, int, int, int, int, char *, int);

Channel *channel_new(char *, int, int, int, int, u_int, u_int, int, char *, int);

void channel_set_fds(int, int, int, int, int, int);

void channel_set_fds(int, int, int, int, int, int, u_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_confirm(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, int, void *);

void channel_input_close(int, u_int32_t, void *);

void channel_input_close(int, int, void *);

void channel_input_close_confirmation(int, u_int32_t, void *);

void channel_input_close_confirmation(int, int, void *);

void channel_input_data(int, u_int32_t, void *);

void channel_input_data(int, int, void *);

void channel_input_extended_data(int, u_int32_t, void *);

void channel_input_extended_data(int, int, void *);

void channel_input_ieof(int, u_int32_t, void *);

void channel_input_ieof(int, int, void *);

void channel_input_oclose(int, u_int32_t, void *);

void channel_input_oclose(int, int, void *);

void channel_input_open_confirmation(int, u_int32_t, void *);

void channel_input_open_confirmation(int, int, void *);

void channel_input_open_failure(int, u_int32_t, void *);

void channel_input_open_failure(int, int, void *);

void channel_input_port_open(int, u_int32_t, void *);

void channel_input_port_open(int, int, void *);

void channel_input_window_adjust(int, u_int32_t, void *);

void channel_input_window_adjust(int, int, void *);

/* file descriptor handling (read/write) */

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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_setup_local_fwd_listener(u_short, const char *, u_short, int);

int

int channel_setup_remote_fwd_listener(const char *, u_short, int);

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);

int x11_create_display_inet(int, int, int, u_int *);

char *x11_create_display_inet(int, int);

void x11_input_open(int, u_int32_t, void *);

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 *);

void deny_input_open(int, u_int32_t, void *);

/* agent forwarding */

void auth_request_forwarding(void);

char *auth_get_socket_name(void);

void auth_input_open_request(int, u_int32_t, void *);

void auth_sock_cleanup_proc(void *);

int auth_input_request_forwarding(struct passwd *);

void auth_input_open_request(int, int, void *);

/* channel close */

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 *);

/* channel events */

/* for the input state */

void chan_rcvd_oclose(Channel *);

extern chan_event_fn *chan_rcvd_oclose;

void chan_read_failed(Channel *);

extern chan_event_fn *chan_read_failed;

void chan_ibuf_empty(Channel *);

extern chan_event_fn *chan_ibuf_empty;

/* for the output state */

void chan_rcvd_ieof(Channel *);

extern chan_event_fn *chan_rcvd_ieof;

void chan_write_failed(Channel *);

extern chan_event_fn *chan_write_failed;

void chan_obuf_empty(Channel *);

extern chan_event_fn *chan_obuf_empty;

#endif