/* @(#)svc.h 2.2 88/07/29 4.0 RPCSRC; from 1.20 88/02/08 SMI */ /* * Copyright (c) 2010, Oracle America, Inc. * * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * * Neither the name of the "Oracle America, Inc." nor the names of * its contributors may be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * svc.h, Server-side remote procedure call interface. */ #ifndef GSSRPC_SVC_H #define GSSRPC_SVC_H #include <gssrpc/svc_auth.h> GSSRPC__BEGIN_DECLS /* * 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 SVCXPRT { #ifdef _WIN32 SOCKET xp_sock; #else int xp_sock; #endif u_short xp_port; /* associated port number */ struct xp_ops { /* receive incoming requests */ bool_t (*xp_recv)(struct SVCXPRT *, struct rpc_msg *); /* get transport status */ enum xprt_stat (*xp_stat)(struct SVCXPRT *); /* get arguments */ bool_t (*xp_getargs)(struct SVCXPRT *, xdrproc_t, void *); /* send reply */ bool_t (*xp_reply)(struct SVCXPRT *, struct rpc_msg *); /* free mem allocated for args */ bool_t (*xp_freeargs)(struct SVCXPRT *, xdrproc_t, void *); /* destroy this struct */ void (*xp_destroy)(struct SVCXPRT *); } *xp_ops; int xp_addrlen; /* length of remote address */ struct sockaddr_in xp_raddr; /* remote address */ struct opaque_auth xp_verf; /* raw response verifier */ SVCAUTH *xp_auth; /* auth flavor of current req */ void *xp_p1; /* private */ void *xp_p2; /* private */ int xp_laddrlen; /* length of local address */ struct sockaddr_in xp_laddr; /* local address */ } 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_GETARGS_REQ(xprt, req, xargs, argsp) \ (*(xprt)->xp_ops->xp_getargs_req)((xprt), (req), (xargs), (argsp)) #define svc_getargs_req(xprt, req, xargs, argsp) \ (*(xprt)->xp_ops->xp_getargs_req)((xprt), (req), (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_REPLY_REQ(xprt, req, msg) \ (*(xprt)->xp_ops->xp_reply_req) ((xprt), (req), (msg)) #define svc_reply_req(xprt, msg) \ (*(xprt)->xp_ops->xp_reply_req) ((xprt), (req), (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 { rpcprog_t rq_prog; /* service program number */ rpcvers_t rq_vers; /* service protocol version */ rpcproc_t rq_proc; /* the desired procedure */ struct opaque_auth rq_cred; /* raw creds from the wire */ void * rq_clntcred; /* read only cooked client cred */ void * rq_svccred; /* read only svc cred/context */ void * rq_clntname; /* read only client name */ SVCXPRT *rq_xprt; /* associated transport */ /* The request's auth flavor *should* be here, but the svc_req */ /* isn't passed around everywhere it is necessary. The */ /* transport *is* passed around, so the auth flavor it stored */ /* there. This means that the transport must be single */ /* threaded, but other parts of SunRPC already require that. */ /*SVCAUTH *rq_auth; associated auth flavor */ }; /* * Service registration * * svc_register(xprt, prog, vers, dispatch, protocol) * SVCXPRT *xprt; * rpcprog_t prog; * rpcvers_t vers; * void (*dispatch)(); * int protocol; like IPPROTO_TCP or _UDP; zero means do not register * * registerrpc(prog, vers, proc, routine, inproc, outproc) * returns 0 upon success, -1 if error. */ extern bool_t svc_register(SVCXPRT *, rpcprog_t, rpcvers_t, void (*)(struct svc_req *, SVCXPRT *), int); extern int registerrpc(rpcprog_t, rpcvers_t, rpcproc_t, char *(*)(void *), xdrproc_t, xdrproc_t); /* * Service un-registration * * svc_unregister(prog, vers) * rpcprog_t prog; * rpcvers_t vers; */ extern void svc_unregister(rpcprog_t, rpcvers_t); /* * 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 or the new SVC_GETARGS_REQ (both 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 or the new svc_sendreply_req. * * 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, caddr_t); extern void svcerr_decode(SVCXPRT *); extern void svcerr_weakauth(SVCXPRT *); extern void svcerr_noproc(SVCXPRT *); extern void svcerr_progvers(SVCXPRT *, rpcvers_t, rpcvers_t); 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 */ extern int svc_maxfd; #ifdef FD_SETSIZE extern fd_set svc_fdset; /* RENAMED */ #define gssrpc_svc_fds gsssrpc_svc_fdset.fds_bits[0] /* compatibility */ #else extern int svc_fds; #endif /* def FD_SETSIZE */ extern int svc_maxfd; extern void svc_getreq(int); #ifdef FD_SETSIZE extern void svc_getreqset(fd_set *);/* takes fdset instead of int */ #else extern void svc_getreqset(int *); #endif extern void svc_run(void); /* never returns */ /* * 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); extern int svcudp_enablecache(SVCXPRT *, uint32_t); /* * Tcp based rpc. */ extern SVCXPRT *svctcp_create(int, u_int, u_int); /* * Like svtcp_create(), except the routine takes any *open* UNIX file * descriptor as its first input. */ extern SVCXPRT *svcfd_create(int, u_int, u_int); /* XXX add auth_gsapi_log_*? */ GSSRPC__END_DECLS #endif /* !defined(GSSRPC_SVC_H) */
