lib/libssh
1
0
Fork 0
mirror of https://git.libssh.org/projects/libssh.git synced 2025-11-29 01:03:57 +03:00
Code Activity

channesl: Fix delayed close

Browse Source 
If the SSH2_MSG_CHANNEL_CLOSE was previously received, change the
channel state to SSH_STATE_CHANNEL_CLOSED in
ssh_channel_read_timeout() after reading all data available.

Fixes T31

Signed-off-by: Tom Deseyn <tom.deseyn@gmail.com>
Reviewed-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
This commit is contained in:
Tom Deseyn
2021-01-05 16:15:24 +01:00
committed by Anderson Toshiyuki Sasaki
parent 710815674a
commit 44dfee778f
1 changed files with 28 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/channels.c
View File

@@ -648,6 +648,23 @@ SSH_PACKET_CALLBACK(channel_rcv_eof) {
return SSH_PACKET_USED;
}
static bool ssh_channel_has_unread_data(ssh_channel channel)
{
if (channel == NULL) {
return false;
}
if ((channel->stdout_buffer &&
ssh_buffer_get_len(channel->stdout_buffer) > 0) ||
(channel->stderr_buffer &&
ssh_buffer_get_len(channel->stderr_buffer) > 0))
{
return true;
}
return false;
}
SSH_PACKET_CALLBACK(channel_rcv_close) {
ssh_channel channel;
(void)user;
@@ -665,14 +682,12 @@ SSH_PACKET_CALLBACK(channel_rcv_close) {
channel->local_channel,
channel->remote_channel);
if ((channel->stdout_buffer &&
ssh_buffer_get_len(channel->stdout_buffer) > 0) ||
(channel->stderr_buffer &&
ssh_buffer_get_len(channel->stderr_buffer) > 0)) {
channel->delayed_close = 1;
} else {
if (!ssh_channel_has_unread_data(channel)) {
channel->state = SSH_CHANNEL_STATE_CLOSED;
} else {
channel->delayed_close = 1;
}
if (channel->remote_eof == 0) {
SSH_LOG(SSH_LOG_PACKET,
"Remote host not polite enough to send an eof before close");
@@ -1604,10 +1619,7 @@ int ssh_channel_is_eof(ssh_channel channel) {
if(channel == NULL) {
return SSH_ERROR;
}
if ((channel->stdout_buffer &&
ssh_buffer_get_len(channel->stdout_buffer) > 0) ||
(channel->stderr_buffer &&
ssh_buffer_get_len(channel->stderr_buffer) > 0)) {
if (ssh_channel_has_unread_data(channel)) {
return 0;
}
@@ -2812,7 +2824,6 @@ static int ssh_channel_read_termination(void *s){
return 0;
}
/* TODO FIXME Fix the delayed close thing */
/* TODO FIXME Fix the blocking behaviours */
/**
@@ -2957,6 +2968,10 @@ int ssh_channel_read_timeout(ssh_channel channel,
if (channel->counter != NULL) {
channel->counter->in_bytes += len;
}
/* Try completing the delayed_close */
if (channel->delayed_close && !ssh_channel_has_unread_data(channel)) {
channel->state = SSH_CHANNEL_STATE_CLOSED;
}
/* Authorize some buffering while userapp is busy */
if (channel->local_window < WINDOWLIMIT) {
if (grow_window(session, channel, 0) < 0) {