src/usr.bin/ssh/channels.h - diff

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Diff for /src/usr.bin/ssh/channels.h between version 1.127 and 1.128

version 1.127, 2017/08/30 03:59:08

version 1.128, 2017/09/12 06:32:07

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struct ssh;

struct Channel;

typedef struct Channel Channel;

struct fwd_perm_list;

typedef void channel_open_fn(int, int, void *);

typedef void channel_open_fn(struct ssh *, int, int, void *);

typedef void channel_callback_fn(int, void *);

typedef void channel_callback_fn(struct ssh *, int, void *);

typedef int channel_infilter_fn(struct Channel *, char *, int);

typedef int channel_infilter_fn(struct ssh *, struct Channel *, char *, int);

typedef void channel_filter_cleanup_fn(int, void *);

typedef void channel_filter_cleanup_fn(struct ssh *, int, void *);

typedef u_char *channel_outfilter_fn(struct Channel *, u_char **, u_int *);

typedef u_char *channel_outfilter_fn(struct ssh *, struct Channel *,

u_char **, size_t *);

/* Channel success/failure callbacks */

typedef void channel_confirm_cb(int, struct Channel *, void *);

typedef void channel_confirm_cb(struct ssh *, int, struct Channel *, void *);

typedef void channel_confirm_abandon_cb(struct Channel *, void *);

typedef void channel_confirm_abandon_cb(struct ssh *, struct Channel *, void *);

struct channel_confirm {

TAILQ_ENTRY(channel_confirm) entry;

channel_confirm_cb *cb;

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};

/* Callbacks for mux channels back into client-specific code */

typedef int mux_callback_fn(struct Channel *);

typedef int mux_callback_fn(struct ssh *, struct Channel *);

struct Channel {

int type; /* channel type/state */

int self; /* my own channel identifier */

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

/* XXX should be uint32_t */

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

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

int flags; /* close sent/rcvd */

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* to a matching pre-select handler.

* this way post-select handlers are not

* accidentally called if a FD gets reused */

Buffer input; /* data read from socket, to be sent over

struct sshbuf *input; /* data read from socket, to be sent over

* encrypted connection */

Buffer output; /* data received over encrypted connection for

struct sshbuf *output; /* data received over encrypted connection for

* send on socket */

Buffer extended;

struct sshbuf *extended;

char *path;

/* path for unix domain sockets, or host name for forwards */

int listening_port; /* port being listened for forwards */

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int datagram;

/* non-blocking connect */

/* XXX make this a pointer so the structure can be opaque */

struct channel_connect connect_ctx;

/* multiplexing protocol hook, called for each packet received */

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#define CHAN_EOF_RCVD 0x08

#define CHAN_LOCAL 0x10

#define CHAN_RBUF 16*1024

/* Read buffer size */

#define CHAN_RBUF (16*1024)

/* Hard limit on number of channels */

#define CHANNELS_MAX_CHANNELS (16*1024)

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

#define CHANNEL_EFD_INPUT_ACTIVE(c) \

(c->extended_usage == CHAN_EXTENDED_READ && \

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

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

sshbuf_len(c->extended) > 0))

#define CHANNEL_EFD_OUTPUT_ACTIVE(c) \

(c->extended_usage == CHAN_EXTENDED_WRITE && \

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

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

sshbuf_len(c->extended) > 0))

/* Add channel management structures to SSH transport instance */

void channel_init_channels(struct ssh *ssh);

/* channel management */

Channel *channel_by_id(int);

Channel *channel_by_id(struct ssh *, int);

Channel *channel_by_remote_id(int);

Channel *channel_by_remote_id(struct ssh *, int);

Channel *channel_lookup(int);

Channel *channel_lookup(struct ssh *, int);

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

Channel *channel_new(struct ssh *, char *, int, int, int, int,

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

u_int, u_int, int, char *, int);

void channel_free(Channel *);

void channel_set_fds(struct ssh *, int, int, int, int, int,

void channel_free_all(void);

int, int, u_int);

void channel_stop_listening(void);

void channel_free(struct ssh *, Channel *);

void channel_free_all(struct ssh *);

void channel_stop_listening(struct ssh *);

void channel_send_open(int);

void channel_send_open(struct ssh *, int);

void channel_request_start(int, char *, int);

void channel_request_start(struct ssh *, int, char *, int);

void channel_register_cleanup(int, channel_callback_fn *, int);

void channel_register_cleanup(struct ssh *, int,

void channel_register_open_confirm(int, channel_open_fn *, void *);

channel_callback_fn *, int);

void channel_register_filter(int, channel_infilter_fn *,

void channel_register_open_confirm(struct ssh *, int,

channel_outfilter_fn *, channel_filter_cleanup_fn *, void *);

channel_open_fn *, void *);

void channel_register_status_confirm(int, channel_confirm_cb *,

void channel_register_filter(struct ssh *, int, channel_infilter_fn *,

channel_confirm_abandon_cb *, void *);

channel_outfilter_fn *, channel_filter_cleanup_fn *, void *);

void channel_cancel_cleanup(int);

void channel_register_status_confirm(struct ssh *, int,

int channel_close_fd(int *);

channel_confirm_cb *, channel_confirm_abandon_cb *, void *);

void channel_send_window_changes(void);

void channel_cancel_cleanup(struct ssh *, int);

int channel_close_fd(struct ssh *, int *);

void channel_send_window_changes(struct ssh *);

/* mux proxy support */

int channel_proxy_downstream(Channel *mc);

int channel_proxy_downstream(struct ssh *, Channel *mc);

int channel_proxy_upstream(Channel *, int, u_int32_t, struct ssh *);

/* protocol handler */

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void channel_prepare_select(struct ssh *, fd_set **, fd_set **, int *,

u_int*, time_t*);

void channel_after_select(struct ssh *, fd_set *, fd_set *);

void channel_output_poll(void);

void channel_output_poll(struct ssh *);

int channel_not_very_much_buffered_data(void);

int channel_not_very_much_buffered_data(struct ssh *);

void channel_close_all(void);

void channel_close_all(struct ssh *);

int channel_still_open(void);

int channel_still_open(struct ssh *);

char *channel_open_message(void);

char *channel_open_message(struct ssh *);

int channel_find_open(void);

int channel_find_open(struct ssh *);

/* tcp forwarding */

struct Forward;

struct ForwardOptions;

void channel_set_af(int af);

void channel_set_af(struct ssh *, int af);

void channel_permit_all_opens(void);

void channel_permit_all_opens(struct ssh *);

void channel_add_permitted_opens(char *, int);

void channel_add_permitted_opens(struct ssh *, char *, int);

int channel_add_adm_permitted_opens(char *, int);

int channel_add_adm_permitted_opens(struct ssh *, char *, int);

void channel_disable_adm_local_opens(void);

void channel_copy_adm_permitted_opens(struct ssh *,

void channel_update_permitted_opens(int, int);

const struct fwd_perm_list *);

void channel_clear_permitted_opens(void);

void channel_disable_adm_local_opens(struct ssh *);

void channel_clear_adm_permitted_opens(void);

void channel_update_permitted_opens(struct ssh *, int, int);

void channel_print_adm_permitted_opens(void);

void channel_clear_permitted_opens(struct ssh *);

Channel *channel_connect_to_port(const char *, u_short, char *, char *, int *,

void channel_clear_adm_permitted_opens(struct ssh *);

const char **);

void channel_print_adm_permitted_opens(struct ssh *);

Channel *channel_connect_to_path(const char *, char *, char *);

Channel *channel_connect_to_port(struct ssh *, const char *, u_short,

Channel *channel_connect_stdio_fwd(const char*, u_short, int, int);

char *, char *, int *, const char **);

Channel *channel_connect_by_listen_address(const char *, u_short,

Channel *channel_connect_to_path(struct ssh *, const char *, char *, char *);

char *, char *);

Channel *channel_connect_stdio_fwd(struct ssh *, const char*,

Channel *channel_connect_by_listen_path(const char *, char *, char *);

u_short, int, int);

int channel_request_remote_forwarding(struct Forward *);

Channel *channel_connect_by_listen_address(struct ssh *, const char *,

int channel_setup_local_fwd_listener(struct Forward *, struct ForwardOptions *);

u_short, char *, char *);

int channel_request_rforward_cancel(struct Forward *);

Channel *channel_connect_by_listen_path(struct ssh *, const char *,

int channel_setup_remote_fwd_listener(struct Forward *, int *, struct ForwardOptions *);

char *, char *);

int channel_cancel_rport_listener(struct Forward *);

int channel_request_remote_forwarding(struct ssh *, struct Forward *);

int channel_cancel_lport_listener(struct Forward *, int, struct ForwardOptions *);

int channel_setup_local_fwd_listener(struct ssh *, struct Forward *,

struct ForwardOptions *);

int channel_request_rforward_cancel(struct ssh *, struct Forward *);

int channel_setup_remote_fwd_listener(struct ssh *, struct Forward *,

int *, struct ForwardOptions *);

int channel_cancel_rport_listener(struct ssh *, struct Forward *);

int channel_cancel_lport_listener(struct ssh *, struct Forward *,

int, struct ForwardOptions *);

int permitopen_port(const char *);

/* x11 forwarding */

void channel_set_x11_refuse_time(u_int);

void channel_set_x11_refuse_time(struct ssh *, u_int);

int x11_connect_display(void);

int x11_connect_display(struct ssh *);

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

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

void x11_request_forwarding_with_spoofing(int, const char *, const char *,

void x11_request_forwarding_with_spoofing(struct ssh *, int,

const char *, int);

const char *, const char *, const char *, int);

/* channel close */

int chan_is_dead(Channel *, int);

int chan_is_dead(struct ssh *, Channel *, int);

void chan_mark_dead(Channel *);

void chan_mark_dead(struct ssh *, Channel *);

/* channel events */

void chan_rcvd_oclose(Channel *);

void chan_rcvd_oclose(struct ssh *, Channel *);

void chan_rcvd_eow(Channel *); /* SSH2-only */

void chan_rcvd_eow(struct ssh *, Channel *);

void chan_read_failed(Channel *);

void chan_read_failed(struct ssh *, Channel *);

void chan_ibuf_empty(Channel *);

void chan_ibuf_empty(struct ssh *, Channel *);

void chan_rcvd_ieof(struct ssh *, Channel *);

void chan_rcvd_ieof(Channel *);

void chan_write_failed(struct ssh *, Channel *);

void chan_write_failed(Channel *);

void chan_obuf_empty(struct ssh *, Channel *);

void chan_obuf_empty(Channel *);

#endif