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- (bal) Channels.c and Channels.h -- "Merge Functions, simplify" (draged 

out of ssh Attic)
This commit is contained in:
Ben Lindstrom 2001-06-09 00:41:05 +00:00
parent c763767f18
commit e9c999137a
3 changed files with 519 additions and 568 deletions
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4
ChangeLog
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@ -12,6 +12,8 @@
packet.c serverloop.c session.c ssh.c]
undo the .c file split, just merge the header and keep the cvs
history
- (bal) Channels.c and Channels.h -- "Merge Functions, simplify" (draged
out of ssh Attic)
20010606
- OpenBSD CVS Sync
@ -5523,4 +5525,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
$Id: ChangeLog,v 1.1249 2001/06/09 00:36:26 mouring Exp $
$Id: ChangeLog,v 1.1250 2001/06/09 00:41:05 mouring Exp $

898
channels.c
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185
channels.h
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@ -32,10 +32,10 @@
* (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 1.33 2001/05/28 23:14:49 markus Exp $"); */
/* RCSID("$OpenBSD: channels.h,v 1.35 2001/05/31 10:30:15 markus Exp $"); */
#ifndef CHANNELS_H
#define CHANNELS_H
#ifndef CHANNEL_H
#define CHANNEL_H
#include "buffer.h"
@ -124,21 +124,42 @@ struct Channel {
#define CHAN_X11_WINDOW_DEFAULT (4*1024)
#define CHAN_X11_PACKET_DEFAULT (CHAN_X11_WINDOW_DEFAULT/2)
/* possible input states */
#define CHAN_INPUT_OPEN 0x01
#define CHAN_INPUT_WAIT_DRAIN 0x02
#define CHAN_INPUT_WAIT_OCLOSE 0x04
#define CHAN_INPUT_CLOSED 0x08
void channel_open(int id);
/* possible output states */
#define CHAN_OUTPUT_OPEN 0x10
#define CHAN_OUTPUT_WAIT_DRAIN 0x20
#define CHAN_OUTPUT_WAIT_IEOF 0x40
#define CHAN_OUTPUT_CLOSED 0x80
#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_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 id);
void
channel_set_fds(int id, int rfd, int wfd, int efd,
int extusage, int nonblock);
void deny_input_open(int type, int plen, void *ctxt);
/* protocol handler */
void channel_input_channel_request(int type, int plen, void *ctxt);
void channel_input_close(int type, int plen, void *ctxt);
@ -152,66 +173,22 @@ 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);
/* Sets specific protocol options. */
void channel_set_options(int hostname_in_open);
/* file descriptor handling (read/write) */
/*
* Allocate a new channel object and set its type and socket. Remote_name
* must have been allocated with xmalloc; this will free it when the channel
* is freed.
*/
Channel *
channel_new(char *ctype, int type, int rfd, int wfd, int efd,
int window, int maxpack, int extended_usage, char *remote_name,
int nonblock);
/* Free the channel and close its socket. */
void channel_free(Channel *c);
/*
* Allocate/update select bitmasks and add any bits relevant to channels in
* select bitmasks.
*/
void
channel_prepare_select(fd_set **readsetp, fd_set **writesetp, int *maxfdp,
int rekeying);
/*
* After select, perform any appropriate operations for channels which have
* events pending.
*/
void channel_after_select(fd_set * readset, fd_set * writeset);
/* If there is data to send to the connection, send some of it now. */
void channel_output_poll(void);
/* Returns true if no channel has too much buffered data. */
int channel_not_very_much_buffered_data(void);
/* This closes any sockets that are listening for connections; this removes
any unix domain sockets. */
void channel_stop_listening(void);
/*
* Closes the sockets of all channels. This is used to close extra file
* descriptors after a fork.
*/
void channel_close_all(void);
/* Returns true if there is still an open channel over the connection. */
int channel_still_open(void);
/*
* Returns a string containing a list of all open channels. The list is
* suitable for displaying to the user. It uses crlf instead of newlines.
* The caller should free the string with xfree.
*/
char *channel_open_message(void);
int channel_find_open(void);
/*
* Initiate forwarding of connections to local port "port" through the secure
* channel to host:port from remote side.
*/
/* 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);
@ -219,95 +196,53 @@ 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);
/*
* Initiate forwarding of connections to port "port" on remote host through
* the secure channel to host:port from local side. This never returns if
* there was an error. This registers that open requests for that port are
* permitted.
*/
void
channel_request_remote_forwarding(u_short port, const char *host,
u_short remote_port);
/*
* Permits opening to any host/port if permitted_opens[] is empty. This is
* usually called by the server, because the user could connect to any port
* anyway, and the server has no way to know but to trust the client anyway.
*/
void channel_permit_all_opens(void);
/* Add host/port to list of allowed targets for port forwarding */
void channel_add_permitted_opens(char *host, int port);
/* Flush list */
void channel_clear_permitted_opens(void);
/*
* This is called after receiving CHANNEL_FORWARDING_REQUEST. This initates
* listening for the port, and sends back a success reply (or disconnect
* message if there was an error). This never returns if there was an error.
*/
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);
/*
* Creates a port for X11 connections, and starts listening for it. Returns
* the display name, or NULL if an error was encountered.
*/
/* x11 forwarding */
int x11_connect_display(void);
//int x11_check_cookie(Buffer *b);
char *x11_create_display(int screen);
/*
* Creates an internet domain socket for listening for X11 connections.
* Returns a suitable value for the DISPLAY variable, or NULL if an error
* occurs.
*/
char *x11_create_display_inet(int screen, int x11_display_offset);
/*
* This is called when SSH_SMSG_X11_OPEN is received. The packet contains
* the remote channel number. We should do whatever we want, and respond
* with either SSH_MSG_OPEN_CONFIRMATION or SSH_MSG_OPEN_FAILURE.
*/
void x11_input_open(int type, int plen, void *ctxt);
/*
* Requests forwarding of X11 connections. This should be called on the
* client only.
*/
void x11_request_forwarding(void);
/*
* Requests forwarding for X11 connections, with authentication spoofing.
* This should be called in the client only.
*/
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);
/* agent forwarding */
/* Sends a message to the server to request authentication fd forwarding. */
void auth_request_forwarding(void);
/*
* Returns the name of the forwarded authentication socket. Returns NULL if
* there is no forwarded authentication socket. The returned value points to
* a static buffer.
*/
char *auth_get_socket_name(void);
/*
* This is called to process SSH_CMSG_AGENT_REQUEST_FORWARDING on the server.
* This starts forwarding authentication requests.
*/
int auth_input_request_forwarding(struct passwd * pw);
/* This is called to process an SSH_SMSG_AGENT_OPEN message. */
void auth_input_open_request(int type, int plen, void *ctxt);
/* XXX */
int channel_connect_to(const char *host, u_short host_port);
int channel_connect_by_listen_adress(u_short listen_port);
int x11_connect_display(void);
/* channel close */
int channel_find_open(void);
typedef void chan_event_fn(Channel * c);
/* for the input state */
extern chan_event_fn *chan_rcvd_oclose;
extern chan_event_fn *chan_read_failed;
extern chan_event_fn *chan_ibuf_empty;
/* for the output state */
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