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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 2002-01-22 23:27:11 +11:00
parent 0e3b87279c
commit abea8ee1c3
3 changed files with 59 additions and 52 deletions
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6
ChangeLog
View File

@ -159,6 +159,10 @@
[auth2.c auth2-chall.c compat.c sshconnect2.c sshd.c]
use buffer API and avoid static strings of fixed size;
ok provos@/mouring@
- 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@
20020121
@ -7307,4 +7311,4 @@
- Wrote replacements for strlcpy and mkdtemp
- Released 1.0pre1
$Id: ChangeLog,v 1.1768 2002/01/22 12:26:38 djm Exp $
$Id: ChangeLog,v 1.1769 2002/01/22 12:27:11 djm Exp $

22
channels.h
View File

@ -32,7 +32,7 @@
* (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 1.56 2001/12/28 15:06:00 markus Exp $"); */
/* RCSID("$OpenBSD: channels.h,v 1.57 2002/01/13 21:31:20 markus Exp $"); */
#ifndef CHANNEL_H
#define CHANNEL_H
@ -68,8 +68,8 @@ struct Channel {
int type; /* channel type/state */
int self; /* my own channel identifier */
int remote_id; /* channel identifier for remote peer */
int istate; /* input from channel (state of receive half) */
int ostate; /* output to channel (state of transmit half) */
u_int istate; /* input from channel (state of receive half) */
u_int ostate; /* output to channel (state of transmit half) */
int flags; /* close sent/rcvd */
int rfd; /* read fd */
int wfd; /* write fd */
@ -123,16 +123,16 @@ struct Channel {
#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
#define CHAN_INPUT_OPEN 0
#define CHAN_INPUT_WAIT_DRAIN 1
#define CHAN_INPUT_WAIT_OCLOSE 2
#define CHAN_INPUT_CLOSED 3
/* 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_OUTPUT_OPEN 0
#define CHAN_OUTPUT_WAIT_DRAIN 1
#define CHAN_OUTPUT_WAIT_IEOF 2
#define CHAN_OUTPUT_CLOSED 3
#define CHAN_CLOSE_SENT 0x01
#define CHAN_CLOSE_RCVD 0x02

83
nchan.c
View File

@ -23,7 +23,7 @@
*/
#include "includes.h"
RCSID("$OpenBSD: nchan.c,v 1.36 2002/01/10 12:47:59 markus Exp $");
RCSID("$OpenBSD: nchan.c,v 1.37 2002/01/13 21:31:20 markus Exp $");
#include "ssh1.h"
#include "ssh2.h"
@ -83,6 +83,28 @@ static void chan_send_eof2(Channel *);
static void chan_shutdown_write(Channel *);
static void chan_shutdown_read(Channel *);
static char *ostates[] = { "open", "drain", "wait_ieof", "closed" };
static char *istates[] = { "open", "drain", "wait_oclose", "closed" };
static void
chan_set_istate(Channel *c, u_int next)
{
if (c->istate > CHAN_INPUT_CLOSED || next > CHAN_INPUT_CLOSED)
fatal("chan_set_istate: bad state %d -> %d", c->istate, next);
debug("channel %d: input %s -> %s", c->self, istates[c->istate],
istates[next]);
c->istate = next;
}
static void
chan_set_ostate(Channel *c, u_int next)
{
if (c->ostate > CHAN_OUTPUT_CLOSED || next > CHAN_OUTPUT_CLOSED)
fatal("chan_set_ostate: bad state %d -> %d", c->ostate, next);
debug("channel %d: output %s -> %s", c->self, ostates[c->ostate],
ostates[next]);
c->ostate = next;
}
/*
* SSH1 specific implementation of event functions
*/
@ -93,20 +115,17 @@ chan_rcvd_oclose1(Channel *c)
debug("channel %d: rcvd oclose", c->self);
switch (c->istate) {
case CHAN_INPUT_WAIT_OCLOSE:
debug("channel %d: input wait_oclose -> closed", c->self);
c->istate = CHAN_INPUT_CLOSED;
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
case CHAN_INPUT_OPEN:
debug("channel %d: input open -> closed", c->self);
chan_shutdown_read(c);
chan_send_ieof1(c);
c->istate = CHAN_INPUT_CLOSED;
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
case CHAN_INPUT_WAIT_DRAIN:
/* both local read_failed and remote write_failed */
log("channel %d: input drain -> closed", c->self);
chan_send_ieof1(c);
c->istate = CHAN_INPUT_CLOSED;
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
default:
error("channel %d: protocol error: rcvd_oclose for istate %d",
@ -120,9 +139,8 @@ chan_read_failed_12(Channel *c)
debug("channel %d: read failed", c->self);
switch (c->istate) {
case CHAN_INPUT_OPEN:
debug("channel %d: input open -> drain", c->self);
chan_shutdown_read(c);
c->istate = CHAN_INPUT_WAIT_DRAIN;
chan_set_istate(c, CHAN_INPUT_WAIT_DRAIN);
break;
default:
error("channel %d: chan_read_failed for istate %d",
@ -141,9 +159,8 @@ chan_ibuf_empty1(Channel *c)
}
switch (c->istate) {
case CHAN_INPUT_WAIT_DRAIN:
debug("channel %d: input drain -> wait_oclose", c->self);
chan_send_ieof1(c);
c->istate = CHAN_INPUT_WAIT_OCLOSE;
chan_set_istate(c, CHAN_INPUT_WAIT_OCLOSE);
break;
default:
error("channel %d: chan_ibuf_empty for istate %d",
@ -157,12 +174,10 @@ chan_rcvd_ieof1(Channel *c)
debug("channel %d: rcvd ieof", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
debug("channel %d: output open -> drain", c->self);
c->ostate = CHAN_OUTPUT_WAIT_DRAIN;
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
break;
case CHAN_OUTPUT_WAIT_IEOF:
debug("channel %d: output wait_ieof -> closed", c->self);
c->ostate = CHAN_OUTPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
error("channel %d: protocol error: rcvd_ieof for ostate %d",
@ -176,14 +191,12 @@ chan_write_failed1(Channel *c)
debug("channel %d: write failed", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
debug("channel %d: output open -> wait_ieof", c->self);
chan_send_oclose1(c);
c->ostate = CHAN_OUTPUT_WAIT_IEOF;
chan_set_ostate(c, CHAN_OUTPUT_WAIT_IEOF);
break;
case CHAN_OUTPUT_WAIT_DRAIN:
debug("channel %d: output wait_drain -> closed", c->self);
chan_send_oclose1(c);
c->ostate = CHAN_OUTPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
error("channel %d: chan_write_failed for ostate %d",
@ -202,9 +215,8 @@ chan_obuf_empty1(Channel *c)
}
switch (c->ostate) {
case CHAN_OUTPUT_WAIT_DRAIN:
debug("channel %d: output drain -> closed", c->self);
chan_send_oclose1(c);
c->ostate = CHAN_OUTPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
error("channel %d: internal error: obuf_empty for ostate %d",
@ -261,8 +273,8 @@ chan_rcvd_oclose2(Channel *c)
c->flags |= CHAN_CLOSE_RCVD;
if (c->type == SSH_CHANNEL_LARVAL) {
/* tear down larval channels immediately */
c->ostate = CHAN_OUTPUT_CLOSED;
c->istate = CHAN_INPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
chan_set_istate(c, CHAN_INPUT_CLOSED);
return;
}
switch (c->ostate) {
@ -271,21 +283,18 @@ chan_rcvd_oclose2(Channel *c)
* wait until a data from the channel is consumed if a CLOSE
* is received
*/
debug("channel %d: output open -> drain", c->self);
c->ostate = CHAN_OUTPUT_WAIT_DRAIN;
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
break;
}
switch (c->istate) {
case CHAN_INPUT_OPEN:
debug("channel %d: input open -> closed", c->self);
chan_shutdown_read(c);
break;
case CHAN_INPUT_WAIT_DRAIN:
debug("channel %d: input drain -> closed", c->self);
chan_send_eof2(c);
break;
}
c->istate = CHAN_INPUT_CLOSED;
chan_set_istate(c, CHAN_INPUT_CLOSED);
}
static void
chan_ibuf_empty2(Channel *c)
@ -298,10 +307,9 @@ chan_ibuf_empty2(Channel *c)
}
switch (c->istate) {
case CHAN_INPUT_WAIT_DRAIN:
debug("channel %d: input drain -> closed", c->self);
if (!(c->flags & CHAN_CLOSE_SENT))
chan_send_eof2(c);
c->istate = CHAN_INPUT_CLOSED;
chan_set_istate(c, CHAN_INPUT_CLOSED);
break;
default:
error("channel %d: chan_ibuf_empty for istate %d",
@ -313,10 +321,8 @@ static void
chan_rcvd_ieof2(Channel *c)
{
debug("channel %d: rcvd eof", c->self);
if (c->ostate == CHAN_OUTPUT_OPEN) {
debug("channel %d: output open -> drain", c->self);
c->ostate = CHAN_OUTPUT_WAIT_DRAIN;
}
if (c->ostate == CHAN_OUTPUT_OPEN)
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
}
static void
chan_write_failed2(Channel *c)
@ -324,14 +330,12 @@ chan_write_failed2(Channel *c)
debug("channel %d: write failed", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
debug("channel %d: output open -> closed", c->self);
chan_shutdown_write(c); /* ?? */
c->ostate = CHAN_OUTPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
case CHAN_OUTPUT_WAIT_DRAIN:
debug("channel %d: output drain -> closed", c->self);
chan_shutdown_write(c);
c->ostate = CHAN_OUTPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
error("channel %d: chan_write_failed for ostate %d",
@ -350,9 +354,8 @@ chan_obuf_empty2(Channel *c)
}
switch (c->ostate) {
case CHAN_OUTPUT_WAIT_DRAIN:
debug("channel %d: output drain -> closed", c->self);
chan_shutdown_write(c);
c->ostate = CHAN_OUTPUT_CLOSED;
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
error("channel %d: chan_obuf_empty for ostate %d",