X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=libs%2Fwatt32%2Frpc%2Fsvc.h;fp=libs%2Fwatt32%2Frpc%2Fsvc.h;h=1333ae7a63cba795a945ac681f2895d3528d107a;hb=214a070238552de6167bbf506cbc23006969a182;hp=0000000000000000000000000000000000000000;hpb=d3c8a942b99443abf0c11d9759994022ed6da597;p=oftp diff --git a/libs/watt32/rpc/svc.h b/libs/watt32/rpc/svc.h new file mode 100644 index 0000000..1333ae7 --- /dev/null +++ b/libs/watt32/rpc/svc.h @@ -0,0 +1,291 @@ +/*!\file rpc/svc.h + * RPC server-side interface. + */ + +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + * + * from: @(#)svc.h 1.20 88/02/08 SMI + * from: @(#)svc.h 2.2 88/07/29 4.0 RPCSRC + * $Id: svc.h,v 1.5 1996/01/30 23:32:29 mpp Exp $ + */ + +/* + * svc.h, Server-side remote procedure call interface. + * + * Copyright (C) 1984, Sun Microsystems, Inc. + */ + +#ifndef __RPC_SVC_H +#define __RPC_SVC_H + +#ifndef __SYS_CDEFS_H +#include +#endif + +/* + * This interface must manage two items concerning remote procedure calling: + * + * 1) An arbitrary number of transport connections upon which rpc requests + * are received. The two most notable transports are TCP and UDP; they are + * created and registered by routines in svc_tcp.c and svc_udp.c, respectively; + * they in turn call xprt_register and xprt_unregister. + * + * 2) An arbitrary number of locally registered services. Services are + * described by the following four data: program number, version number, + * "service dispatch" function, a transport handle, and a boolean that + * indicates whether or not the exported program should be registered with a + * local binder service; if true the program's number and version and the + * port number from the transport handle are registered with the binder. + * These data are registered with the rpc svc system via svc_register. + * + * A service's dispatch function is called whenever an rpc request comes in + * on a transport. The request's program and version numbers must match + * those of the registered service. The dispatch function is passed two + * parameters, struct svc_req * and SVCXPRT *, defined below. + */ + +enum xprt_stat { + XPRT_DIED, + XPRT_MOREREQS, + XPRT_IDLE +}; + +/* + * Server side transport handle + */ +typedef struct { + int xp_sock; + u_short xp_port; /* associated port number */ + 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 address */ + struct sockaddr_in xp_raddr; /* remote address */ + struct opaque_auth xp_verf; /* raw response verifier */ + caddr_t xp_p1; /* private */ + caddr_t xp_p2; /* private */ +} SVCXPRT; + +/* + * Approved way of getting address of caller + */ +#define svc_getcaller(x) (&(x)->xp_raddr) + +/* + * Operations defined on an SVCXPRT handle + * + * SVCXPRT *xprt; + * struct rpc_msg *msg; + * xdrproc_t xargs; + * caddr_t argsp; + */ +#define SVC_RECV(xprt, msg) \ + (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) +#define svc_recv(xprt, msg) \ + (*(xprt)->xp_ops->xp_recv)((xprt), (msg)) + +#define SVC_STAT(xprt) \ + (*(xprt)->xp_ops->xp_stat)(xprt) +#define svc_stat(xprt) \ + (*(xprt)->xp_ops->xp_stat)(xprt) + +#define SVC_GETARGS(xprt, xargs, argsp) \ + (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp)) +#define svc_getargs(xprt, xargs, argsp) \ + (*(xprt)->xp_ops->xp_getargs)((xprt), (xargs), (argsp)) + +#define SVC_REPLY(xprt, msg) \ + (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) +#define svc_reply(xprt, msg) \ + (*(xprt)->xp_ops->xp_reply) ((xprt), (msg)) + +#define SVC_FREEARGS(xprt, xargs, argsp) \ + (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp)) +#define svc_freeargs(xprt, xargs, argsp) \ + (*(xprt)->xp_ops->xp_freeargs)((xprt), (xargs), (argsp)) + +#define SVC_DESTROY(xprt) \ + (*(xprt)->xp_ops->xp_destroy)(xprt) +#define svc_destroy(xprt) \ + (*(xprt)->xp_ops->xp_destroy)(xprt) + + +/* + * Service request + */ +struct svc_req { + u_long rq_prog; /* service program number */ + u_long rq_vers; /* service protocol version */ + u_long rq_proc; /* the desired procedure */ + struct opaque_auth rq_cred; /* raw creds from the wire */ + caddr_t rq_clntcred; /* read only cooked cred */ + SVCXPRT *rq_xprt; /* associated transport */ +}; + +__BEGIN_DECLS + +/* + * Service registration + * + * svc_register(xprt, prog, vers, dispatch, protocol) + * SVCXPRT *xprt; + * u_long prog; + * u_long vers; + * void (*dispatch)(); + * int protocol; // like TCP or UDP, zero means do not register + */ +extern bool_t svc_register (SVCXPRT *, u_long, u_long, void (*)(), int); + +/* + * Service un-registration + * + * svc_unregister(prog, vers) + * u_long prog; + * u_long vers; + */ +extern void svc_unregister (u_long, u_long); + +/* + * Transport registration. + * + * xprt_register(xprt) + * SVCXPRT *xprt; + */ +extern void xprt_register (SVCXPRT *); + +/* + * Transport un-register + * + * xprt_unregister(xprt) + * SVCXPRT *xprt; + */ +extern void xprt_unregister (SVCXPRT *); + + + +/* + * When the service routine is called, it must first check to see if it + * knows about the procedure; if not, it should call svcerr_noproc + * and return. If so, it should deserialize its arguments via + * SVC_GETARGS (defined above). If the deserialization does not work, + * svcerr_decode should be called followed by a return. Successful + * decoding of the arguments should be followed the execution of the + * procedure's code and a call to svc_sendreply. + * + * Also, if the service refuses to execute the procedure due to too- + * weak authentication parameters, svcerr_weakauth should be called. + * Note: do not confuse access-control failure with weak authentication! + * + * NB: In pure implementations of rpc, the caller always waits for a reply + * msg. This message is sent when svc_sendreply is called. + * Therefore pure service implementations should always call + * svc_sendreply even if the function logically returns void; use + * xdr.h - xdr_void for the xdr routine. HOWEVER, tcp based rpc allows + * for the abuse of pure rpc via batched calling or pipelining. In the + * case of a batched call, svc_sendreply should NOT be called since + * this would send a return message, which is what batching tries to avoid. + * It is the service/protocol writer's responsibility to know which calls are + * batched and which are not. Warning: responding to batch calls may + * deadlock the caller and server processes! + */ + +extern bool_t svc_sendreply (SVCXPRT *, xdrproc_t, char *); +extern void svcerr_decode (SVCXPRT *); +extern void svcerr_weakauth (SVCXPRT *); +extern void svcerr_noproc (SVCXPRT *); +extern void svcerr_progvers (SVCXPRT *, u_long, u_long); +extern void svcerr_auth (SVCXPRT *, enum auth_stat); +extern void svcerr_noprog (SVCXPRT *); +extern void svcerr_systemerr(SVCXPRT *); + +/* + * Lowest level dispatching -OR- who owns this process anyway. + * Somebody has to wait for incoming requests and then call the correct + * service routine. The routine svc_run does infinite waiting; i.e., + * svc_run never returns. + * Since another (co-existant) package may wish to selectively wait for + * incoming calls or other events outside of the rpc architecture, the + * routine svc_getreq is provided. It must be passed readfds, the + * "in-place" results of a select system call (see select, section 2). + */ + +/* + * Global keeper of rpc service descriptors in use + * dynamic; must be inspected before each call to select + */ +#ifdef FD_SETSIZE + extern void svc_getreqset (fd_set *); + extern fd_set svc_fdset; + #define svc_fds svc_fdset.fds_bits[0] /* compatibility */ +#else + extern int svc_fds; +#endif + +/* + * a small program implemented by the svc_rpc implementation itself; + * also see clnt.h for protocol numbers. + */ +extern void rpctest_service(); +extern void svc_getreq (int); +extern void svc_run (void); + +/* + * Socket to use on svcxxx_create call to get default socket + */ +#define RPC_ANYSOCK -1 + +/* + * These are the existing service side transport implementations + */ + +/* + * Memory based rpc for testing and timing. + */ +extern SVCXPRT *svcraw_create (void); + + +/* + * Udp based rpc. + */ +extern SVCXPRT *svcudp_create (int); +extern SVCXPRT *svcudp_bufcreate (int, u_int, u_int); + +/* + * Tcp based rpc. + */ +extern SVCXPRT *svctcp_create (int, u_int, u_int); + +__END_DECLS + +#endif