diff options
Diffstat (limited to 'usr.bin/ssh/nchan.h')
| -rw-r--r-- | usr.bin/ssh/nchan.h | 76 |
1 files changed, 24 insertions, 52 deletions
diff --git a/usr.bin/ssh/nchan.h b/usr.bin/ssh/nchan.h index f312b0ec64b..5fb3bc04e90 100644 --- a/usr.bin/ssh/nchan.h +++ b/usr.bin/ssh/nchan.h @@ -1,4 +1,4 @@ -/* RCSID("$Id: nchan.h,v 1.2 1999/10/16 22:29:01 markus Exp $"); */ +/* RCSID("$Id: nchan.h,v 1.3 1999/10/17 16:56:09 markus Exp $"); */ #ifndef NCHAN_H #define NCHAN_H @@ -25,61 +25,33 @@ * See the debugging output from 'ssh -v' and 'sshd -d' of * ssh-1.2.27 as an example. * - * Details: (for Channel data structure see channels.h) - * - * - the output_buffer gets data received from the remote peer and - * is written to the socket, - * - the input_buffer gets data from the socket and is sent to remote peer. - * - the socket represents the local object communicating with an object - * reachable via the peer - * - * PEER A PEER B - * - * read(sock, input_buffer) < 0; - * shutdown_read(); - * flush(input_buffer) =: DATA - * send(DATA) -> rcvd(DATA) - * write(sock, output_buffer:=DATA); - * send(IEOF) -> rcvd(IEOF) - * shutdown_write() if: - * a) write fails - * b) rcvd_IEOF==true && - * output_buffer==empty - * rcvd(OCLOSE) <- send(OCLOSE) - * - * The channel is now half closed. No data will flow from A to B. - * - * Note that each side can remove the channel only if 2 messages - * have been sent and received and the associated socket has been - * shutdown, see below: */ -enum { - /* ssh-proto-1.5 overloads message-types */ - CHAN_IEOF = SSH_MSG_CHANNEL_CLOSE, - /* there will be no more data from sender */ - CHAN_OCLOSE = SSH_MSG_CHANNEL_CLOSE_CONFIRMATION, - /* all received data has been written to the socket */ +/* ssh-proto-1.5 overloads prot-1.3-message-types */ +#define SSH_MSG_CHANNEL_INPUT_EOF SSH_MSG_CHANNEL_CLOSE +#define SSH_MSG_CHANNEL_OUTPUT_CLOSE SSH_MSG_CHANNEL_CLOSE_CONFIRMATION - /* channel close flags */ - CHAN_IEOF_SENT = 0x01, - CHAN_IEOF_RCVD = 0x02, - CHAN_OCLOSE_SENT = 0x04, - CHAN_OCLOSE_RCVD = 0x08, - CHAN_SHUT_RD = 0x10, - CHAN_SHUT_WR = 0x20, +/* 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 - /* a channel can be removed if ALL the following flags are set: */ - CHAN_CLOSED = CHAN_IEOF_SENT | CHAN_IEOF_RCVD | - CHAN_OCLOSE_SENT | CHAN_OCLOSE_RCVD | - CHAN_SHUT_RD | CHAN_SHUT_WR -}; +/* 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 -void chan_del_if_dead(Channel *c); -void chan_rcvd_ieof(Channel *c); +/* EVENTS for the input state */ void chan_rcvd_oclose(Channel *c); -void chan_send_ieof(Channel *c); -void chan_send_oclose(Channel *c); -void chan_shutdown_read(Channel *c); -void chan_shutdown_write(Channel *c); +void chan_read_failed(Channel *c); +void chan_ibuf_empty(Channel *c); + +/* EVENTS for the output state */ +void chan_rcvd_ieof(Channel *c); +void chan_write_failed(Channel *c); +void chan_obuf_empty(Channel *c); + +void chan_init_iostates(Channel *c); #endif |