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Diffstat (limited to 'nchan.h')
| -rw-r--r-- | nchan.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/nchan.h b/nchan.h new file mode 100644 index 00000000..16d360d3 --- /dev/null +++ b/nchan.h @@ -0,0 +1,57 @@ +/* RCSID("$Id: nchan.h,v 1.1 1999/10/27 03:42:44 damien Exp $"); */ + +#ifndef NCHAN_H +#define NCHAN_H + +/* + * SSH Protocol 1.5 aka New Channel Protocol + * Thanks to Martina, Axel and everyone who left Erlangen, leaving me bored. + * Written by Markus Friedl in October 1999 + * + * Protocol versions 1.3 and 1.5 differ in the handshake protocol used for the + * tear down of channels: + * + * 1.3: strict request-ack-protocol: + * CLOSE -> + * <- CLOSE_CONFIRM + * + * 1.5: uses variations of: + * IEOF -> + * <- OCLOSE + * <- IEOF + * OCLOSE -> + * i.e. both sides have to close the channel + * + * See the debugging output from 'ssh -v' and 'sshd -d' of + * ssh-1.2.27 as an example. + * + */ + +/* 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 + +/* 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 + +/* 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 + +/* EVENTS for the input state */ +void chan_rcvd_oclose(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 |