/*
* rpmem_ssh_monitor -- check connection state of ssh
*
* Return value:
* 0 - disconnected
* 1 - connected
* <0 - error
*/
int
rpmem_ssh_monitor(struct rpmem_ssh *rps, int nonblock)
{
uint32_t buff;
int flags = MSG_PEEK;
if (nonblock)
flags |= MSG_DONTWAIT;
int ret = rpmem_xread(rps->cmd->fd_out, &buff, sizeof(buff), flags);
if (!ret) {
RPMEM_LOG(ERR, "unexpected data received");
errno = EPROTO;
return -1;
}
if (ret < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK)
return 1;
else
return ret;
}
return 0;
}
/*
* rpmem_ssh_recv -- receive data using ssh transport layer
*
* The received data is decoded using base64.
*/
int
rpmem_ssh_recv(struct rpmem_ssh *rps, void *buff, size_t len)
{
int ret = rpmem_xread(rps->cmd->fd_out, buff,
len, MSG_NOSIGNAL);
if (ret == 1) {
errno = ECONNRESET;
} else if (ret < 0) {
if (errno == EPIPE)
errno = ECONNRESET;
}
return ret;
}
