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- markus@cvs.openbsd.org 2002/01/13 21:31:20
[channels.h nchan.c]
add chan_set_[io]state(), order states, state is now an u_int,
simplifies debugging messages; ok provos@
This commit is contained in:
Damien Miller
parent
0e3b87279c
commit
abea8ee1c3
@ -159,6 +159,10 @@
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[auth2.c auth2-chall.c compat.c sshconnect2.c sshd.c]
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use buffer API and avoid static strings of fixed size;
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ok provos@/mouring@
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- markus@cvs.openbsd.org 2002/01/13 21:31:20
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[channels.h nchan.c]
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add chan_set_[io]state(), order states, state is now an u_int,
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simplifies debugging messages; ok provos@
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20020121
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@ -7307,4 +7311,4 @@
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- Wrote replacements for strlcpy and mkdtemp
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- Released 1.0pre1
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$Id: ChangeLog,v 1.1768 2002/01/22 12:26:38 djm Exp $
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$Id: ChangeLog,v 1.1769 2002/01/22 12:27:11 djm Exp $
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22
channels.h
22
channels.h
@ -32,7 +32,7 @@
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* RCSID("$OpenBSD: channels.h,v 1.56 2001/12/28 15:06:00 markus Exp $"); */
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/* RCSID("$OpenBSD: channels.h,v 1.57 2002/01/13 21:31:20 markus Exp $"); */
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#ifndef CHANNEL_H
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#define CHANNEL_H
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@ -68,8 +68,8 @@ struct Channel {
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int type; /* channel type/state */
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int self; /* my own channel identifier */
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int remote_id; /* channel identifier for remote peer */
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int istate; /* input from channel (state of receive half) */
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int ostate; /* output to channel (state of transmit half) */
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u_int istate; /* input from channel (state of receive half) */
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u_int ostate; /* output to channel (state of transmit half) */
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int flags; /* close sent/rcvd */
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int rfd; /* read fd */
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int wfd; /* write fd */
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@ -123,16 +123,16 @@ struct Channel {
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#define CHAN_X11_PACKET_DEFAULT (CHAN_X11_WINDOW_DEFAULT/2)
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/* possible input states */
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#define CHAN_INPUT_OPEN 0x01
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#define CHAN_INPUT_WAIT_DRAIN 0x02
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#define CHAN_INPUT_WAIT_OCLOSE 0x04
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#define CHAN_INPUT_CLOSED 0x08
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#define CHAN_INPUT_OPEN 0
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#define CHAN_INPUT_WAIT_DRAIN 1
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#define CHAN_INPUT_WAIT_OCLOSE 2
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#define CHAN_INPUT_CLOSED 3
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/* possible output states */
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#define CHAN_OUTPUT_OPEN 0x10
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#define CHAN_OUTPUT_WAIT_DRAIN 0x20
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#define CHAN_OUTPUT_WAIT_IEOF 0x40
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#define CHAN_OUTPUT_CLOSED 0x80
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#define CHAN_OUTPUT_OPEN 0
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#define CHAN_OUTPUT_WAIT_DRAIN 1
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#define CHAN_OUTPUT_WAIT_IEOF 2
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#define CHAN_OUTPUT_CLOSED 3
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#define CHAN_CLOSE_SENT 0x01
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#define CHAN_CLOSE_RCVD 0x02
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83
nchan.c
83
nchan.c
@ -23,7 +23,7 @@
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*/
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#include "includes.h"
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RCSID("$OpenBSD: nchan.c,v 1.36 2002/01/10 12:47:59 markus Exp $");
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RCSID("$OpenBSD: nchan.c,v 1.37 2002/01/13 21:31:20 markus Exp $");
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#include "ssh1.h"
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#include "ssh2.h"
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@ -83,6 +83,28 @@ static void chan_send_eof2(Channel *);
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static void chan_shutdown_write(Channel *);
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static void chan_shutdown_read(Channel *);
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static char *ostates[] = { "open", "drain", "wait_ieof", "closed" };
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static char *istates[] = { "open", "drain", "wait_oclose", "closed" };
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static void
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chan_set_istate(Channel *c, u_int next)
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{
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if (c->istate > CHAN_INPUT_CLOSED || next > CHAN_INPUT_CLOSED)
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fatal("chan_set_istate: bad state %d -> %d", c->istate, next);
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debug("channel %d: input %s -> %s", c->self, istates[c->istate],
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istates[next]);
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c->istate = next;
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}
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static void
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chan_set_ostate(Channel *c, u_int next)
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{
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if (c->ostate > CHAN_OUTPUT_CLOSED || next > CHAN_OUTPUT_CLOSED)
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fatal("chan_set_ostate: bad state %d -> %d", c->ostate, next);
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debug("channel %d: output %s -> %s", c->self, ostates[c->ostate],
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ostates[next]);
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c->ostate = next;
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}
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/*
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* SSH1 specific implementation of event functions
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*/
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@ -93,20 +115,17 @@ chan_rcvd_oclose1(Channel *c)
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debug("channel %d: rcvd oclose", c->self);
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switch (c->istate) {
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case CHAN_INPUT_WAIT_OCLOSE:
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debug("channel %d: input wait_oclose -> closed", c->self);
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c->istate = CHAN_INPUT_CLOSED;
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chan_set_istate(c, CHAN_INPUT_CLOSED);
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break;
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case CHAN_INPUT_OPEN:
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debug("channel %d: input open -> closed", c->self);
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chan_shutdown_read(c);
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chan_send_ieof1(c);
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c->istate = CHAN_INPUT_CLOSED;
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chan_set_istate(c, CHAN_INPUT_CLOSED);
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break;
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case CHAN_INPUT_WAIT_DRAIN:
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/* both local read_failed and remote write_failed */
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log("channel %d: input drain -> closed", c->self);
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chan_send_ieof1(c);
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c->istate = CHAN_INPUT_CLOSED;
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chan_set_istate(c, CHAN_INPUT_CLOSED);
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break;
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default:
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error("channel %d: protocol error: rcvd_oclose for istate %d",
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@ -120,9 +139,8 @@ chan_read_failed_12(Channel *c)
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debug("channel %d: read failed", c->self);
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switch (c->istate) {
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case CHAN_INPUT_OPEN:
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debug("channel %d: input open -> drain", c->self);
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chan_shutdown_read(c);
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c->istate = CHAN_INPUT_WAIT_DRAIN;
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chan_set_istate(c, CHAN_INPUT_WAIT_DRAIN);
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break;
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default:
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error("channel %d: chan_read_failed for istate %d",
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@ -141,9 +159,8 @@ chan_ibuf_empty1(Channel *c)
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}
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switch (c->istate) {
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case CHAN_INPUT_WAIT_DRAIN:
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debug("channel %d: input drain -> wait_oclose", c->self);
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chan_send_ieof1(c);
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c->istate = CHAN_INPUT_WAIT_OCLOSE;
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chan_set_istate(c, CHAN_INPUT_WAIT_OCLOSE);
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break;
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default:
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error("channel %d: chan_ibuf_empty for istate %d",
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@ -157,12 +174,10 @@ chan_rcvd_ieof1(Channel *c)
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debug("channel %d: rcvd ieof", c->self);
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switch (c->ostate) {
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case CHAN_OUTPUT_OPEN:
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debug("channel %d: output open -> drain", c->self);
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c->ostate = CHAN_OUTPUT_WAIT_DRAIN;
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chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
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break;
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case CHAN_OUTPUT_WAIT_IEOF:
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debug("channel %d: output wait_ieof -> closed", c->self);
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c->ostate = CHAN_OUTPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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break;
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default:
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error("channel %d: protocol error: rcvd_ieof for ostate %d",
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@ -176,14 +191,12 @@ chan_write_failed1(Channel *c)
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debug("channel %d: write failed", c->self);
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switch (c->ostate) {
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case CHAN_OUTPUT_OPEN:
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debug("channel %d: output open -> wait_ieof", c->self);
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chan_send_oclose1(c);
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c->ostate = CHAN_OUTPUT_WAIT_IEOF;
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chan_set_ostate(c, CHAN_OUTPUT_WAIT_IEOF);
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break;
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case CHAN_OUTPUT_WAIT_DRAIN:
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debug("channel %d: output wait_drain -> closed", c->self);
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chan_send_oclose1(c);
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c->ostate = CHAN_OUTPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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break;
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default:
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error("channel %d: chan_write_failed for ostate %d",
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@ -202,9 +215,8 @@ chan_obuf_empty1(Channel *c)
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}
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switch (c->ostate) {
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case CHAN_OUTPUT_WAIT_DRAIN:
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debug("channel %d: output drain -> closed", c->self);
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chan_send_oclose1(c);
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c->ostate = CHAN_OUTPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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break;
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default:
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error("channel %d: internal error: obuf_empty for ostate %d",
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@ -261,8 +273,8 @@ chan_rcvd_oclose2(Channel *c)
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c->flags |= CHAN_CLOSE_RCVD;
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if (c->type == SSH_CHANNEL_LARVAL) {
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/* tear down larval channels immediately */
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c->ostate = CHAN_OUTPUT_CLOSED;
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c->istate = CHAN_INPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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chan_set_istate(c, CHAN_INPUT_CLOSED);
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return;
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}
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switch (c->ostate) {
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@ -271,21 +283,18 @@ chan_rcvd_oclose2(Channel *c)
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* wait until a data from the channel is consumed if a CLOSE
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* is received
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*/
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debug("channel %d: output open -> drain", c->self);
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c->ostate = CHAN_OUTPUT_WAIT_DRAIN;
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chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
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break;
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}
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switch (c->istate) {
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case CHAN_INPUT_OPEN:
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debug("channel %d: input open -> closed", c->self);
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chan_shutdown_read(c);
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break;
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case CHAN_INPUT_WAIT_DRAIN:
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debug("channel %d: input drain -> closed", c->self);
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chan_send_eof2(c);
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break;
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}
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c->istate = CHAN_INPUT_CLOSED;
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chan_set_istate(c, CHAN_INPUT_CLOSED);
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}
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static void
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chan_ibuf_empty2(Channel *c)
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@ -298,10 +307,9 @@ chan_ibuf_empty2(Channel *c)
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}
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switch (c->istate) {
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case CHAN_INPUT_WAIT_DRAIN:
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debug("channel %d: input drain -> closed", c->self);
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if (!(c->flags & CHAN_CLOSE_SENT))
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chan_send_eof2(c);
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c->istate = CHAN_INPUT_CLOSED;
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chan_set_istate(c, CHAN_INPUT_CLOSED);
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break;
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default:
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error("channel %d: chan_ibuf_empty for istate %d",
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@ -313,10 +321,8 @@ static void
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chan_rcvd_ieof2(Channel *c)
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{
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debug("channel %d: rcvd eof", c->self);
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if (c->ostate == CHAN_OUTPUT_OPEN) {
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debug("channel %d: output open -> drain", c->self);
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c->ostate = CHAN_OUTPUT_WAIT_DRAIN;
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}
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if (c->ostate == CHAN_OUTPUT_OPEN)
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chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
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}
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static void
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chan_write_failed2(Channel *c)
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@ -324,14 +330,12 @@ chan_write_failed2(Channel *c)
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debug("channel %d: write failed", c->self);
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switch (c->ostate) {
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case CHAN_OUTPUT_OPEN:
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debug("channel %d: output open -> closed", c->self);
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chan_shutdown_write(c); /* ?? */
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c->ostate = CHAN_OUTPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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break;
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case CHAN_OUTPUT_WAIT_DRAIN:
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debug("channel %d: output drain -> closed", c->self);
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chan_shutdown_write(c);
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c->ostate = CHAN_OUTPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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break;
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default:
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error("channel %d: chan_write_failed for ostate %d",
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@ -350,9 +354,8 @@ chan_obuf_empty2(Channel *c)
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}
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switch (c->ostate) {
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case CHAN_OUTPUT_WAIT_DRAIN:
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debug("channel %d: output drain -> closed", c->self);
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chan_shutdown_write(c);
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c->ostate = CHAN_OUTPUT_CLOSED;
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chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
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break;
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default:
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error("channel %d: chan_obuf_empty for ostate %d",
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