+/* $OpenBSD: nchan.c,v 1.62 2008/11/07 18:50:18 stevesk Exp $ */
/*
* Copyright (c) 1999, 2000, 2001, 2002 Markus Friedl. All rights reserved.
*
*/
#include "includes.h"
-RCSID("$OpenBSD: nchan.c,v 1.47 2002/06/19 00:27:55 deraadt Exp $");
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <errno.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "openbsd-compat/sys-queue.h"
#include "ssh1.h"
#include "ssh2.h"
#include "buffer.h"
* tear down of channels:
*
* 1.3: strict request-ack-protocol:
- * CLOSE ->
- * <- CLOSE_CONFIRM
+ * CLOSE ->
+ * <- CLOSE_CONFIRM
*
* 1.5: uses variations of:
- * IEOF ->
- * <- OCLOSE
- * <- IEOF
- * OCLOSE ->
- * i.e. both sides have to close the channel
+ * IEOF ->
+ * <- OCLOSE
+ * <- IEOF
+ * OCLOSE ->
+ * i.e. both sides have to close the channel
*
* 2.0: the EOF messages are optional
*
static void chan_send_oclose1(Channel *);
static void chan_send_close2(Channel *);
static void chan_send_eof2(Channel *);
+static void chan_send_eow2(Channel *);
/* helper */
static void chan_shutdown_write(Channel *);
{
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],
+ debug2("channel %d: input %s -> %s", c->self, istates[c->istate],
istates[next]);
c->istate = 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],
+ debug2("channel %d: output %s -> %s", c->self, ostates[c->ostate],
ostates[next]);
c->ostate = next;
}
static void
chan_rcvd_oclose1(Channel *c)
{
- debug("channel %d: rcvd oclose", c->self);
+ debug2("channel %d: rcvd oclose", c->self);
switch (c->istate) {
case CHAN_INPUT_WAIT_OCLOSE:
chan_set_istate(c, CHAN_INPUT_CLOSED);
void
chan_read_failed(Channel *c)
{
- debug("channel %d: read failed", c->self);
+ debug2("channel %d: read failed", c->self);
switch (c->istate) {
case CHAN_INPUT_OPEN:
chan_shutdown_read(c);
void
chan_ibuf_empty(Channel *c)
{
- debug("channel %d: ibuf empty", c->self);
+ debug2("channel %d: ibuf empty", c->self);
if (buffer_len(&c->input)) {
error("channel %d: chan_ibuf_empty for non empty buffer",
c->self);
static void
chan_rcvd_ieof1(Channel *c)
{
- debug("channel %d: rcvd ieof", c->self);
+ debug2("channel %d: rcvd ieof", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
static void
chan_write_failed1(Channel *c)
{
- debug("channel %d: write failed", c->self);
+ debug2("channel %d: write failed", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
chan_shutdown_write(c);
void
chan_obuf_empty(Channel *c)
{
- debug("channel %d: obuf empty", c->self);
+ debug2("channel %d: obuf empty", c->self);
if (buffer_len(&c->output)) {
error("channel %d: chan_obuf_empty for non empty buffer",
c->self);
static void
chan_send_ieof1(Channel *c)
{
- debug("channel %d: send ieof", c->self);
+ debug2("channel %d: send ieof", c->self);
switch (c->istate) {
case CHAN_INPUT_OPEN:
case CHAN_INPUT_WAIT_DRAIN:
static void
chan_send_oclose1(Channel *c)
{
- debug("channel %d: send oclose", c->self);
+ debug2("channel %d: send oclose", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
case CHAN_OUTPUT_WAIT_DRAIN:
static void
chan_rcvd_close2(Channel *c)
{
- debug("channel %d: rcvd close", c->self);
+ debug2("channel %d: rcvd close", c->self);
if (c->flags & CHAN_CLOSE_RCVD)
error("channel %d: protocol error: close rcvd twice", c->self);
c->flags |= CHAN_CLOSE_RCVD;
break;
}
}
+void
+chan_rcvd_eow(Channel *c)
+{
+ debug2("channel %d: rcvd eow", c->self);
+ switch (c->istate) {
+ case CHAN_INPUT_OPEN:
+ chan_shutdown_read(c);
+ chan_set_istate(c, CHAN_INPUT_CLOSED);
+ break;
+ }
+}
static void
chan_rcvd_eof2(Channel *c)
{
- debug("channel %d: rcvd eof", c->self);
+ debug2("channel %d: rcvd eof", c->self);
c->flags |= CHAN_EOF_RCVD;
if (c->ostate == CHAN_OUTPUT_OPEN)
chan_set_ostate(c, CHAN_OUTPUT_WAIT_DRAIN);
static void
chan_write_failed2(Channel *c)
{
- debug("channel %d: write failed", c->self);
+ debug2("channel %d: write failed", c->self);
switch (c->ostate) {
case CHAN_OUTPUT_OPEN:
case CHAN_OUTPUT_WAIT_DRAIN:
chan_shutdown_write(c);
+ if (strcmp(c->ctype, "session") == 0)
+ chan_send_eow2(c);
chan_set_ostate(c, CHAN_OUTPUT_CLOSED);
break;
default:
static void
chan_send_eof2(Channel *c)
{
- debug("channel %d: send eof", c->self);
+ debug2("channel %d: send eof", c->self);
switch (c->istate) {
case CHAN_INPUT_WAIT_DRAIN:
packet_start(SSH2_MSG_CHANNEL_EOF);
static void
chan_send_close2(Channel *c)
{
- debug("channel %d: send close", c->self);
+ debug2("channel %d: send close", c->self);
if (c->ostate != CHAN_OUTPUT_CLOSED ||
c->istate != CHAN_INPUT_CLOSED) {
error("channel %d: cannot send close for istate/ostate %d/%d",
c->flags |= CHAN_CLOSE_SENT;
}
}
+static void
+chan_send_eow2(Channel *c)
+{
+ debug2("channel %d: send eow", c->self);
+ if (c->ostate == CHAN_OUTPUT_CLOSED) {
+ error("channel %d: must not sent eow on closed output",
+ c->self);
+ return;
+ }
+ if (!(datafellows & SSH_NEW_OPENSSH))
+ return;
+ packet_start(SSH2_MSG_CHANNEL_REQUEST);
+ packet_put_int(c->remote_id);
+ packet_put_cstring("eow@openssh.com");
+ packet_put_char(0);
+ packet_send();
+}
/* shared */
}
int
-chan_is_dead(Channel *c, int send)
+chan_is_dead(Channel *c, int do_send)
{
if (c->type == SSH_CHANNEL_ZOMBIE) {
- debug("channel %d: zombie", c->self);
+ debug2("channel %d: zombie", c->self);
return 1;
}
if (c->istate != CHAN_INPUT_CLOSED || c->ostate != CHAN_OUTPUT_CLOSED)
return 0;
if (!compat20) {
- debug("channel %d: is dead", c->self);
+ debug2("channel %d: is dead", c->self);
return 1;
}
if ((datafellows & SSH_BUG_EXTEOF) &&
return 0;
}
if (!(c->flags & CHAN_CLOSE_SENT)) {
- if (send) {
+ if (do_send) {
chan_send_close2(c);
} else {
/* channel would be dead if we sent a close */
if (c->flags & CHAN_CLOSE_RCVD) {
- debug("channel %d: almost dead",
+ debug2("channel %d: almost dead",
c->self);
return 1;
}
}
if ((c->flags & CHAN_CLOSE_SENT) &&
(c->flags & CHAN_CLOSE_RCVD)) {
- debug("channel %d: is dead", c->self);
+ debug2("channel %d: is dead", c->self);
return 1;
}
return 0;
if (compat20 && c->type == SSH_CHANNEL_LARVAL)
return;
/* shutdown failure is allowed if write failed already */
- debug("channel %d: close_write", c->self);
+ debug2("channel %d: close_write", c->self);
if (c->sock != -1) {
if (shutdown(c->sock, SHUT_WR) < 0)
- debug("channel %d: chan_shutdown_write: "
- "shutdown() failed for fd%d: %.100s",
+ debug2("channel %d: chan_shutdown_write: "
+ "shutdown() failed for fd %d: %.100s",
c->self, c->sock, strerror(errno));
} else {
if (channel_close_fd(&c->wfd) < 0)
- log("channel %d: chan_shutdown_write: "
- "close() failed for fd%d: %.100s",
+ logit("channel %d: chan_shutdown_write: "
+ "close() failed for fd %d: %.100s",
c->self, c->wfd, strerror(errno));
}
}
{
if (compat20 && c->type == SSH_CHANNEL_LARVAL)
return;
- debug("channel %d: close_read", c->self);
+ debug2("channel %d: close_read", c->self);
if (c->sock != -1) {
/*
* shutdown(sock, SHUT_READ) may return ENOTCONN if the
if (shutdown(c->sock, SHUT_RD) < 0
&& errno != ENOTCONN)
error("channel %d: chan_shutdown_read: "
- "shutdown() failed for fd%d [i%d o%d]: %.100s",
+ "shutdown() failed for fd %d [i%d o%d]: %.100s",
c->self, c->sock, c->istate, c->ostate,
strerror(errno));
} else {
if (channel_close_fd(&c->rfd) < 0)
- log("channel %d: chan_shutdown_read: "
- "close() failed for fd%d: %.100s",
+ logit("channel %d: chan_shutdown_read: "
+ "close() failed for fd %d: %.100s",
c->self, c->rfd, strerror(errno));
}
}