diff options
| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2013-11-21 16:50:49 +0100 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-10-01 09:03:51 +0200 |
| commit | d565bf2f784ce1203e77306d05eade03933bc523 (patch) | |
| tree | 1c30bed601834acd886b9dc4abcecb706349d8b6 /ipc/ipc_right.c | |
| parent | 3a0fae39873c9c7d73dc978888e45b87ad27d44e (diff) | |
ipc: add protected payload
Add a field ip_protected_payload and a flag ip_has_protected_payload
to struct ipc_port.
Clear the protected payload when a receive port is moved from one ipc
space to another. This is done to retain the old behavior of
mach_msg, so that a port name is sent in the msgh_local_port field.
If the new owner of that receive right wishes to use the protected
payload mechanism, it has to be explicitly set again.
* ipc/ipc_port.h (struct ipc_port): Add field ip_protected_payload.
(ipc_port_set_protected_payload): Add function declaration.
(ipc_port_clear_protected_payload): Likewise.
(ipc_port_flag_protected_payload): Add accessor for the protected
payload flag.
(ipc_port_flag_protected_payload_set): Likewise.
(ipc_port_flag_protected_payload_clear): Likewise.
* ipc/ipc_port.c (ipc_port_init): Initialize protected payload.
(ipc_port_print): Print protected_payload.
(ipc_port_set_protected_payload): New function.
(ipc_port_clear_protected_payload): Likewise.
(ipc_port_destroy): Clear the payload when moving a receive port.
* ipc/ipc_right.c (ipc_right_copyin): Likewise.
(ipc_right_copyout): Likewise.
* ipc/ipc_object.c (ipc_object_copyin_from_kernel): Likewise.
* ipc/ipc_object.h (IO_BITS_PROTECTED_PAYLOAD): New bitmask.
(IO_BITS_OTYPE): Adjust accordingly.
Diffstat (limited to 'ipc/ipc_right.c')
| -rw-r--r-- | ipc/ipc_right.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/ipc/ipc_right.c b/ipc/ipc_right.c index 77a68cec..503eb1fc 100644 --- a/ipc/ipc_right.c +++ b/ipc/ipc_right.c @@ -1432,6 +1432,12 @@ ipc_right_copyin( port->ip_receiver_name = MACH_PORT_NULL; port->ip_destination = IP_NULL; + + /* + * Clear the protected payload field to retain + * the behavior of mach_msg. + */ + ipc_port_flag_protected_payload_clear(port); ip_unlock(port); *objectp = (ipc_object_t) port; @@ -1932,6 +1938,12 @@ ipc_right_copyout( port->ip_receiver_name = name; port->ip_receiver = space; + /* + * Clear the protected payload field to retain + * the behavior of mach_msg. + */ + ipc_port_flag_protected_payload_clear(port); + assert((bits & MACH_PORT_TYPE_RECEIVE) == 0); if (bits & MACH_PORT_TYPE_SEND) { |