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Code Issues

XNET was broken. Abnormal client disconnection was not released port and resources. Whole XPM map was corrupted and new connections was not possible.

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Renamed back peer_shutdown -> server_shutdown, XPMF_PEER_SHUTDOWN -> XPMF_SERVER_SHUTDOWN and XCCF_PEER_SHUTDOWN -> XCCF_SERVER_SHUTDOWN because this is pure client things and should not be used by server side.
This commit is contained in:
hvlad 2011-03-19 11:39:03 +00:00
parent e1f3414170
commit fc11a24376
2 changed files with 43 additions and 33 deletions
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70
src/remote/os/win32/xnet.cpp
View File

@ -70,7 +70,7 @@ static rem_port* receive(rem_port*, PACKET*);
static int send_full(rem_port*, PACKET*);
static int send_partial(rem_port*, PACKET*);
static void peer_shutdown(rem_port* port);
static void server_shutdown(rem_port* port);
static rem_port* get_server_port(ULONG, XPM, ULONG, ULONG, ULONG);
static void make_map(ULONG, ULONG, FILE_ID*, CADDR_T*);
static XPM make_xpm(ULONG, ULONG);
@ -1204,7 +1204,7 @@ static rem_port* connect_client(PACKET* packet)
{
if (xpm->xpm_number == map_num &&
xpm->xpm_timestamp == timestamp &&
!(xpm->xpm_flags & XPMF_PEER_SHUTDOWN))
!(xpm->xpm_flags & XPMF_SERVER_SHUTDOWN))
{
break;
}
@ -1558,8 +1558,15 @@ static rem_port* receive( rem_port* main_port, PACKET* packet)
main_port->port_receive.x_client = !(main_port->port_flags & PORT_server);
#endif
if (!xdr_protocol(&main_port->port_receive, packet))
try
{
if (!xdr_protocol(&main_port->port_receive, packet))
packet->p_operation = op_exit;
}
catch(const Exception&)
{
packet->p_operation = op_exit;
}
return main_port;
}
@ -1614,7 +1621,7 @@ static int send_partial( rem_port* port, PACKET* packet)
return xdr_protocol(&port->port_send, packet);
}
static void peer_shutdown(rem_port* port)
static void server_shutdown(rem_port* port)
{
/**************************************
*
@ -1623,19 +1630,20 @@ static void peer_shutdown(rem_port* port)
**************************************
*
* Functional description
* Peer shutdown handler.
* Server shutdown handler (client side only).
*
**************************************/
xnet_log_error("Peer shutdown detected");
fb_assert(!(port->port_flags & PORT_server));
xnet_log_error("Server shutdown detected");
XCC xcc = port->port_xcc;
xcc->xcc_flags |= XCCF_PEER_SHUTDOWN;
xcc->xcc_flags |= XCCF_SERVER_SHUTDOWN;
XPM xpm = xcc->xcc_xpm;
if (!(xpm->xpm_flags & XPMF_PEER_SHUTDOWN))
if (!(xpm->xpm_flags & XPMF_SERVER_SHUTDOWN))
{
const ULONG dead_proc_id = (port->port_flags & PORT_server) ?
XPS(xpm->xpm_address)->xps_client_proc_id : XPS(xpm->xpm_address)->xps_server_proc_id;
const ULONG dead_proc_id = XPS(xpm->xpm_address)->xps_server_proc_id;
// mark all mapped areas connected to the process with pid == dead_proc_id
@ -1643,11 +1651,10 @@ static void peer_shutdown(rem_port* port)
for (xpm = global_client_maps; xpm; xpm = xpm->xpm_next)
{
if (!(xpm->xpm_flags & XPMF_PEER_SHUTDOWN) &&
(XPS(xpm->xpm_address)->xps_server_proc_id == dead_proc_id ||
XPS(xpm->xpm_address)->xps_client_proc_id == dead_proc_id))
if (!(xpm->xpm_flags & XPMF_SERVER_SHUTDOWN) &&
(XPS(xpm->xpm_address)->xps_server_proc_id == dead_proc_id))
{
xpm->xpm_flags |= XPMF_PEER_SHUTDOWN;
xpm->xpm_flags |= XPMF_SERVER_SHUTDOWN;
xpm->xpm_handle = 0;
xpm->xpm_address = NULL;
}
@ -1762,16 +1769,17 @@ static bool_t xnet_getbytes(XDR* xdrs, SCHAR* buff, u_int count)
SLONG bytecount = count;
rem_port* port = (rem_port*) xdrs->x_public;
const bool portServer = (port->port_flags & PORT_server);
XCC xcc = port->port_xcc;
XPM xpm = xcc->xcc_xpm;
while (bytecount && !xnet_shutdown)
{
if (xpm->xpm_flags & XPMF_PEER_SHUTDOWN)
if (!portServer && (xpm->xpm_flags & XPMF_SERVER_SHUTDOWN))
{
if (!(xcc->xcc_flags & XCCF_PEER_SHUTDOWN))
if (!(xcc->xcc_flags & XCCF_SERVER_SHUTDOWN))
{
xcc->xcc_flags |= XCCF_PEER_SHUTDOWN;
xcc->xcc_flags |= XCCF_SERVER_SHUTDOWN;
xnet_error(port, isc_conn_lost, 0);
}
return FALSE;
@ -1879,6 +1887,7 @@ static bool_t xnet_putbytes(XDR* xdrs, const SCHAR* buff, u_int count)
SLONG bytecount = count;
rem_port* port = (rem_port*)xdrs->x_public;
const bool portServer = (port->port_flags & PORT_server);
XCC xcc = port->port_xcc;
XCH xch = xcc->xcc_send_channel;
XPM xpm = xcc->xcc_xpm;
@ -1886,11 +1895,11 @@ static bool_t xnet_putbytes(XDR* xdrs, const SCHAR* buff, u_int count)
while (bytecount && !xnet_shutdown)
{
if (xpm->xpm_flags & XPMF_PEER_SHUTDOWN)
if (!portServer && (xpm->xpm_flags & XPMF_SERVER_SHUTDOWN))
{
if (!(xcc->xcc_flags & XCCF_PEER_SHUTDOWN))
if (!(xcc->xcc_flags & XCCF_SERVER_SHUTDOWN))
{
xcc->xcc_flags |= XCCF_PEER_SHUTDOWN;
xcc->xcc_flags |= XCCF_SERVER_SHUTDOWN;
xnet_error(port, isc_conn_lost, 0);
}
return FALSE;
@ -1909,11 +1918,11 @@ static bool_t xnet_putbytes(XDR* xdrs, const SCHAR* buff, u_int count)
{
while (!xnet_shutdown)
{
if (xpm->xpm_flags & XPMF_PEER_SHUTDOWN)
if (!portServer && (xpm->xpm_flags & XPMF_SERVER_SHUTDOWN))
{
if (!(xcc->xcc_flags & XCCF_PEER_SHUTDOWN))
if (!(xcc->xcc_flags & XCCF_SERVER_SHUTDOWN))
{
xcc->xcc_flags |= XCCF_PEER_SHUTDOWN;
xcc->xcc_flags |= XCCF_SERVER_SHUTDOWN;
xnet_error(port, isc_conn_lost, 0);
}
return FALSE;
@ -1937,9 +1946,9 @@ static bool_t xnet_putbytes(XDR* xdrs, const SCHAR* buff, u_int count)
}
// Another side is dead or something bad has happened
if (!(xps->xps_flags & XPS_DISCONNECTED))
if (!(xps->xps_flags & XPS_DISCONNECTED) && !portServer)
{
peer_shutdown(port);
server_shutdown(port);
}
xnet_error(port, isc_conn_lost, 0);
@ -2009,6 +2018,7 @@ static bool_t xnet_read(XDR* xdrs)
*
**************************************/
rem_port* port = (rem_port*)xdrs->x_public;
const bool portServer = (port->port_flags & PORT_server);
XCC xcc = port->port_xcc;
XCH xch = xcc->xcc_recv_channel;
XPM xpm = xcc->xcc_xpm;
@ -2025,11 +2035,11 @@ static bool_t xnet_read(XDR* xdrs)
while (!xnet_shutdown)
{
if (xpm->xpm_flags & XPMF_PEER_SHUTDOWN)
if (!portServer && (xpm->xpm_flags & XPMF_SERVER_SHUTDOWN))
{
if (!(xcc->xcc_flags & XCCF_PEER_SHUTDOWN))
if (!(xcc->xcc_flags & XCCF_SERVER_SHUTDOWN))
{
xcc->xcc_flags |= XCCF_PEER_SHUTDOWN;
xcc->xcc_flags |= XCCF_SERVER_SHUTDOWN;
xnet_error(port, isc_conn_lost, 0);
}
return FALSE;
@ -2056,9 +2066,9 @@ static bool_t xnet_read(XDR* xdrs)
}
// Another side is dead or something bad has happened
if (!(xps->xps_flags & XPS_DISCONNECTED))
if (!(xps->xps_flags & XPS_DISCONNECTED) && !portServer)
{
peer_shutdown(port);
server_shutdown(port);
}
xnet_error(port, isc_conn_lost, 0);

6
src/remote/os/win32/xnet.h
View File

@ -77,7 +77,7 @@ typedef struct xpm
// Mapped structure flags
const USHORT XPMF_PEER_SHUTDOWN = 1; // peer has shut down
const USHORT XPMF_SERVER_SHUTDOWN = 1; // server has shut down
// Mapped structure ids
@ -127,8 +127,8 @@ typedef struct xcc
// XCC structure flags
const ULONG XCCF_PEER_SHUTDOWN = 1; // unexpected shutdown has been detected on the other side
const ULONG XCCF_ASYNC = 2; // secondary XCC for events processing
const ULONG XCCF_SERVER_SHUTDOWN = 1; // server shutdown has been detected by client
const ULONG XCCF_ASYNC = 2; // secondary XCC for events processing
// This structure (xps) is mapped to the start of the allocated