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/* xcs_proto.h
*
* protocol interfaces for the control interface switch (xcs).
*
* (c) 2004, Andrew Warfield
*
*/
#ifndef __XCS_PROTO_H__
#define __XCS_PROTO_H__
#define XCS_TCP_PORT 1633
/* xcs message types: */
#define XCS_CONNECT_CTRL 0 /* This is a control connection. */
#define XCS_CONNECT_DATA 1 /* This is a data connection. */
#define XCS_CONNECT_BYE 2 /* Terminate a session. */
#define XCS_MSG_BIND 3 /* Register for a message type. */
#define XCS_MSG_UNBIND 4 /* Unregister for a message type. */
#define XCS_VIRQ_BIND 5 /* Register for a virq. */
#define XCS_MSG_WRITELOCK 6 /* Writelock a (dom,type) pair. */
#define XCS_CIF_NEW_CC 7 /* Create a new control channel. */
#define XCS_CIF_FREE_CC 8 /* Create a new control channel. */
#define XCS_REQUEST 9 /* This is a request message. */
#define XCS_RESPONSE 10 /* this is a response Message. */
#define XCS_VIRQ 11 /* this is a virq notification. */
/* xcs result values: */
#define XCS_RSLT_OK 0
#define XCS_RSLT_FAILED 1 /* something bad happened. */
#define XCS_RSLT_ARECONNECTED 2 /* attempt to over connect. */
#define XCS_RSLT_BADSESSION 3 /* request for unknown session id. */
#define XCS_RSLT_NOSESSION 4 /* tried to do something before NEW. */
#define XCS_RSLT_CONINUSE 5 /* Requested connection is taken. */
#define XCS_RSLT_BADREQUEST 6 /* Request message didn't validate. */
/* Binding wildcards */
#define PORT_WILDCARD 0xefffffff
#define TYPE_WILDCARD 0xffff
#define TYPE_VIRQ 0xfffe
typedef struct {
u32 session_id;
} xcs_connect_msg_t;
typedef struct {
int port;
u16 type;
} xcs_bind_msg_t;
typedef struct {
int port;
u16 virq;
} xcs_virq_msg_t;
typedef struct {
u32 dom;
int local_port;
int remote_port;
} xcs_interface_msg_t;
typedef struct {
u32 remote_dom;
int local_port;
control_msg_t msg;
} xcs_control_msg_t;
typedef struct {
u32 type;
u32 result;
union {
xcs_connect_msg_t connect; /* These are xcs ctrl message types */
xcs_bind_msg_t bind;
xcs_virq_msg_t virq;
xcs_interface_msg_t interface;
xcs_control_msg_t control; /* These are xcs data message types */
} PACKED u;
} xcs_msg_t;
/* message validation macros. */
#define PORT_VALID(_p) \
( (((_p) >= 0) && ((_p) < NR_EVENT_CHANNELS)) \
|| ((_p) == PORT_WILDCARD) )
#define TYPE_VALID(_t) \
( ((_t) < 256) \
|| ((_t) == TYPE_VIRQ) \
|| ((_t) == TYPE_WILDCARD) )
#define BIND_MSG_VALID(_b) \
( PORT_VALID((_b)->port) && TYPE_VALID((_b)->type) )
/* Port is overwritten, and we don't currently validate the requested virq. */
#define VIRQ_MSG_VALID(_v) ( 1 )
/* Interfaces may return with ports of -1, but may not be requested as such */
#define INTERFACE_MSG_VALID(_i) \
( PORT_VALID((_i)->local_port) && PORT_VALID((_i)->remote_port) )
#endif /* __XCS_PROTO_H__ */
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