The following sections describe data objects use by the RPC package.
nettype can be one of the following:
union des_block {
struct {
u_int32 high;
u_int32 low;
} key;
char c[8];
};
typedef union des_block des_block;
extern bool_t xdr_des_block();
/*
* Authentication info. Opaque to client.
*/
struct opaque_auth {
enum_t oa_flavor; /* flavor of auth */
caddr_t oa_base; /* address of more auth stuff */
u_int oa_length; /* not to exceed MAX_AUTH_BYTES */
};
/*
* Auth handle, interface to client side authenticators.
*/
typedef struct {
struct opaque_auth ah_cred;
struct opaque_auth ah_verf;
union des_block ah_key;
struct auth_ops {
void (*ah_nextverf)();
int (*ah_marshal)(); /* nextverf & serialize */
int (*ah_validate)(); /* validate varifier */
int (*ah_refresh)(); /* refresh credentials */
void (*ah_destroy)(); /* destroy this structure */
} *ah_ops;
caddr_t ah_private;
} AUTH;
/*
* Client rpc handle.
* Created by individual implementations
* Client is responsible for initializing auth, see e.g. auth_none.c.
*/
typedef struct {
AUTH *cl_auth; /* authenticator */
struct clnt_ops {
enum clnt_stat (*cl_call)(); /* call remote procedure */
void (*cl_abort)(); /* abort a call */
void (*cl_geterr)(); /* get specific error code */
bool_t (*cl_freeres)(); /* frees results */
void (*cl_destroy)(); /* destroy this structure */
bool_t (*cl_control)(); /* the ioctl() of rpc */
} *cl_ops;
caddr_t cl_private; /* private stuff */
char *cl_netid; /* network token */
char *cl_tp; /* device name */
} CLIENT;
enum xprt_stat {
XPRT_DIED,
XPRT_MOREREQS,
XPRT_IDLE
};
/*
* Server side transport handle
*/
typedef struct {
int xp_fd;
#define xp_sock xp_fd
#endif
ushort_t xp_port; /* associated port number.
* Obsolete, but still used to
* specify whether rendezvouser
* or normal connection
*/
struct xp_ops {
bool_t (*xp_recv)(); /* receive incoming requests */
enum xprt_stat (*xp_stat)(); /* get transport status */
bool_t (*xp_getargs)(); /* get arguments */
bool_t (*xp_reply)(); /* send reply */
bool_t (*xp_freeargs)(); /* free mem allocated for args */
void (*xp_destroy)(); /* destroy this struct */
} *xp_ops;
int xp_addrlen; /* length of remote addr. Obsolete */
char *xp_tp; /* transport provider device name */
char *xp_netid; /* network token */
struct netbuf xp_ltaddr; /* local transport address */
struct netbuf xp_rtaddr; /* remote transport address */
char xp_raddr[16]; /* remote address. Obsolete */
struct opaque_auth xp_verf; /* raw response verifier */
caddr_t xp_p1; /* private: for use by svc ops */
caddr_t xp_p2; /* private: for use by svc ops */
caddr_t xp_p3; /* private: for use by svc lib */
} SVCXPRT;
/*
* Xdr operations. XDR_ENCODE causes the type to be encoded into the
* stream. XDR_DECODE causes the type to be extracted from the stream.
* XDR_FREE can be used to release the space allocated by an XDR_DECODE
* request.
*/
enum xdr_op {
XDR_ENCODE=0,
XDR_DECODE=1,
XDR_FREE=2
};
/*
* This is the number of bytes per unit of external data.
*/
#define BYTES_PER_XDR_UNIT (4)
#define RNDUP(x) ((((x) + BYTES_PER_XDR_UNIT - 1) / BYTES_PER_XDR_UNIT) \
* BYTES_PER_XDR_UNIT)
/*
* A xdrproc_t exists for each data type which is to be encoded or decoded.
*
* The second argument to the xdrproc_t is a pointer to an opaque pointer.
* The opaque pointer generally points to a structure of the data type
* to be decoded. If this pointer is 0, then the type routines should
* allocate dynamic storage of the appropriate size and return it.
* bool_t (*xdrproc_t)(XDR *, caddr_t *);
*/
typedef bool_t (*xdrproc_t)();
/*
* The XDR handle.
* Contains operation which is being applied to the stream,
* an operations vector for the particular implementation (for example,
* see xdr_mem.c), and two private fields for the use of the
* particular implementation.
*/
typedef struct {
enum xdr_op x_op; /* operation; fast additional param */
struct xdr_ops {
bool_t (*x_getlong)(); /* get a long from underlying stream */
bool_t (*x_putlong)(); /* put a long to " */
bool_t (*x_getbytes)(); /* get some bytes from " */
bool_t (*x_putbytes)(); /* put some bytes to " */
u_int (*x_getpostn)(); /* returns bytes off from beginning */
bool_t (*x_setpostn)(); /* lets you reposition the stream */
long * (*x_inline)(); /* buf quick ptr to buffered data */
void (*x_destroy)(); /* free privates of this xdr_stream */
} *x_ops;
caddr_t x_public; /* users' data */
caddr_t x_private; /* pointer to private data */
caddr_t x_base; /* private used for position info */
int x_handy; /* extra private word */
} XDR;