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Annotation of src/usr.bin/ssh/nchan.h, Revision 1.4

1.4     ! deraadt     1: /* RCSID("$Id: nchan.h,v 1.3 1999/10/17 16:56:09 markus Exp $"); */
1.2       markus      2:
1.1       markus      3: #ifndef NCHAN_H
                      4: #define NCHAN_H
                      5:
                      6: /*
1.2       markus      7:  * SSH Protocol 1.5 aka New Channel Protocol
                      8:  * Thanks to Martina, Axel and everyone who left Erlangen, leaving me bored.
                      9:  * Written by Markus Friedl in October 1999
1.4     ! deraadt    10:  *
1.2       markus     11:  * Protocol versions 1.3 and 1.5 differ in the handshake protocol used for the
                     12:  * tear down of channels:
1.4     ! deraadt    13:  *
1.2       markus     14:  * 1.3:        strict request-ack-protocol:
                     15:  *     CLOSE   ->
                     16:  *             <-  CLOSE_CONFIRM
1.4     ! deraadt    17:  *
1.2       markus     18:  * 1.5:        uses variations of:
                     19:  *     IEOF    ->
                     20:  *             <-  OCLOSE
                     21:  *             <-  IEOF
                     22:  *     OCLOSE  ->
                     23:  *     i.e. both sides have to close the channel
1.4     ! deraadt    24:  *
1.2       markus     25:  * See the debugging output from 'ssh -v' and 'sshd -d' of
                     26:  * ssh-1.2.27 as an example.
1.4     ! deraadt    27:  *
1.2       markus     28:  */
1.1       markus     29:
1.3       markus     30: /* ssh-proto-1.5 overloads prot-1.3-message-types */
                     31: #define SSH_MSG_CHANNEL_INPUT_EOF      SSH_MSG_CHANNEL_CLOSE
                     32: #define SSH_MSG_CHANNEL_OUTPUT_CLOSE   SSH_MSG_CHANNEL_CLOSE_CONFIRMATION
                     33:
                     34: /* possible input states */
                     35: #define CHAN_INPUT_OPEN                        0x01
                     36: #define CHAN_INPUT_WAIT_DRAIN          0x02
                     37: #define CHAN_INPUT_WAIT_OCLOSE         0x04
                     38: #define CHAN_INPUT_CLOSED              0x08
                     39:
                     40: /* possible output states */
                     41: #define CHAN_OUTPUT_OPEN               0x10
                     42: #define CHAN_OUTPUT_WAIT_DRAIN         0x20
                     43: #define CHAN_OUTPUT_WAIT_IEOF          0x40
                     44: #define CHAN_OUTPUT_CLOSED             0x80
1.1       markus     45:
1.3       markus     46: /* EVENTS for the input state */
1.4     ! deraadt    47: void    chan_rcvd_oclose(Channel * c);
        !            48: void    chan_read_failed(Channel * c);
        !            49: void    chan_ibuf_empty(Channel * c);
1.3       markus     50:
                     51: /* EVENTS for the output state */
1.4     ! deraadt    52: void    chan_rcvd_ieof(Channel * c);
        !            53: void    chan_write_failed(Channel * c);
        !            54: void    chan_obuf_empty(Channel * c);
1.3       markus     55:
1.4     ! deraadt    56: void    chan_init_iostates(Channel * c);
1.1       markus     57: #endif