/* * clnt.h - Client side remote procedure call interface. * * Copyright (c) 2010, Oracle America, Inc. * * 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. */ #ifndef _RPC_CLNT_H #define _RPC_CLNT_H 1 #include <features.h> #include <sys/types.h> #include <rpc/types.h> #include <rpc/auth.h> #include <sys/un.h> __BEGIN_DECLS /* * Rpc calls return an enum clnt_stat. This should be looked at more, * since each implementation is required to live with this (implementation * independent) list of errors. */ enum clnt_stat { RPC_SUCCESS=0, /* call succeeded */ /* * local errors */ RPC_CANTENCODEARGS=1, /* can't encode arguments */ RPC_CANTDECODERES=2, /* can't decode results */ RPC_CANTSEND=3, /* failure in sending call */ RPC_CANTRECV=4, /* failure in receiving result */ RPC_TIMEDOUT=5, /* call timed out */ /* * remote errors */ RPC_VERSMISMATCH=6, /* rpc versions not compatible */ RPC_AUTHERROR=7, /* authentication error */ RPC_PROGUNAVAIL=8, /* program not available */ RPC_PROGVERSMISMATCH=9, /* program version mismatched */ RPC_PROCUNAVAIL=10, /* procedure unavailable */ RPC_CANTDECODEARGS=11, /* decode arguments error */ RPC_SYSTEMERROR=12, /* generic "other problem" */ RPC_NOBROADCAST = 21, /* Broadcasting not supported */ /* * callrpc & clnt_create errors */ RPC_UNKNOWNHOST=13, /* unknown host name */ RPC_UNKNOWNPROTO=17, /* unknown protocol */ RPC_UNKNOWNADDR = 19, /* Remote address unknown */ /* * rpcbind errors */ RPC_RPCBFAILURE=14, /* portmapper failed in its call */ #define RPC_PMAPFAILURE RPC_RPCBFAILURE RPC_PROGNOTREGISTERED=15, /* remote program is not registered */ RPC_N2AXLATEFAILURE = 22, /* Name to addr translation failed */ /* * unspecified error */ RPC_FAILED=16, RPC_INTR=18, RPC_TLIERROR=20, RPC_UDERROR=23, /* * asynchronous errors */ RPC_INPROGRESS = 24, RPC_STALERACHANDLE = 25 }; /* * Error info. */ struct rpc_err { enum clnt_stat re_status; union { int RE_errno; /* related system error */ enum auth_stat RE_why; /* why the auth error occurred */ struct { u_long low; /* lowest verion supported */ u_long high; /* highest verion supported */ } RE_vers; struct { /* maybe meaningful if RPC_FAILED */ long s1; long s2; } RE_lb; /* life boot & debugging only */ } ru; #define re_errno ru.RE_errno #define re_why ru.RE_why #define re_vers ru.RE_vers #define re_lb ru.RE_lb }; /* * Client rpc handle. * Created by individual implementations, see e.g. rpc_udp.c. * Client is responsible for initializing auth, see e.g. auth_none.c. */ typedef struct CLIENT CLIENT; struct CLIENT { AUTH *cl_auth; /* authenticator */ struct clnt_ops { enum clnt_stat (*cl_call) (CLIENT *, u_long, xdrproc_t, caddr_t, xdrproc_t, caddr_t, struct timeval); /* call remote procedure */ void (*cl_abort) (void); /* abort a call */ void (*cl_geterr) (CLIENT *, struct rpc_err *); /* get specific error code */ bool_t (*cl_freeres) (CLIENT *, xdrproc_t, caddr_t); /* frees results */ void (*cl_destroy) (CLIENT *); /* destroy this structure */ bool_t (*cl_control) (CLIENT *, int, char *); /* the ioctl() of rpc */ } *cl_ops; caddr_t cl_private; /* private stuff */ }; /* * client side rpc interface ops * * Parameter types are: * */ /* * enum clnt_stat * CLNT_CALL(rh, proc, xargs, argsp, xres, resp, timeout) * CLIENT *rh; * u_long proc; * xdrproc_t xargs; * caddr_t argsp; * xdrproc_t xres; * caddr_t resp; * struct timeval timeout; */ #define CLNT_CALL(rh, proc, xargs, argsp, xres, resp, secs) \ ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, argsp, xres, resp, secs)) #define clnt_call(rh, proc, xargs, argsp, xres, resp, secs) \ ((*(rh)->cl_ops->cl_call)(rh, proc, xargs, argsp, xres, resp, secs)) /* * void * CLNT_ABORT(rh); * CLIENT *rh; */ #define CLNT_ABORT(rh) ((*(rh)->cl_ops->cl_abort)(rh)) #define clnt_abort(rh) ((*(rh)->cl_ops->cl_abort)(rh)) /* * struct rpc_err * CLNT_GETERR(rh); * CLIENT *rh; */ #define CLNT_GETERR(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) #define clnt_geterr(rh,errp) ((*(rh)->cl_ops->cl_geterr)(rh, errp)) /* * bool_t * CLNT_FREERES(rh, xres, resp); * CLIENT *rh; * xdrproc_t xres; * caddr_t resp; */ #define CLNT_FREERES(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) #define clnt_freeres(rh,xres,resp) ((*(rh)->cl_ops->cl_freeres)(rh,xres,resp)) /* * bool_t * CLNT_CONTROL(cl, request, info) * CLIENT *cl; * u_int request; * char *info; */ #define CLNT_CONTROL(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) #define clnt_control(cl,rq,in) ((*(cl)->cl_ops->cl_control)(cl,rq,in)) /* * control operations that apply to all transports * * Note: options marked XXX are no-ops in this implementation of RPC. * The are present in TI-RPC but can't be implemented here since they * depend on the presence of STREAMS/TLI, which we don't have. */ #define CLSET_TIMEOUT 1 /* set timeout (timeval) */ #define CLGET_TIMEOUT 2 /* get timeout (timeval) */ #define CLGET_SERVER_ADDR 3 /* get server's address (sockaddr) */ #define CLGET_FD 6 /* get connections file descriptor */ #define CLGET_SVC_ADDR 7 /* get server's address (netbuf) XXX */ #define CLSET_FD_CLOSE 8 /* close fd while clnt_destroy */ #define CLSET_FD_NCLOSE 9 /* Do not close fd while clnt_destroy*/ #define CLGET_XID 10 /* Get xid */ #define CLSET_XID 11 /* Set xid */ #define CLGET_VERS 12 /* Get version number */ #define CLSET_VERS 13 /* Set version number */ #define CLGET_PROG 14 /* Get program number */ #define CLSET_PROG 15 /* Set program number */ #define CLSET_SVC_ADDR 16 /* get server's address (netbuf) XXX */ #define CLSET_PUSH_TIMOD 17 /* push timod if not already present XXX */ #define CLSET_POP_TIMOD 18 /* pop timod XXX */ /* * Connectionless only control operations */ #define CLSET_RETRY_TIMEOUT 4 /* set retry timeout (timeval) */ #define CLGET_RETRY_TIMEOUT 5 /* get retry timeout (timeval) */ /* * void * CLNT_DESTROY(rh); * CLIENT *rh; */ #define CLNT_DESTROY(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) #define clnt_destroy(rh) ((*(rh)->cl_ops->cl_destroy)(rh)) /* * RPCTEST is a test program which is accessible on every rpc * transport/port. It is used for testing, performance evaluation, * and network administration. */ #define RPCTEST_PROGRAM ((u_long)1) #define RPCTEST_VERSION ((u_long)1) #define RPCTEST_NULL_PROC ((u_long)2) #define RPCTEST_NULL_BATCH_PROC ((u_long)3) /* * By convention, procedure 0 takes null arguments and returns them */ #define NULLPROC ((u_long)0) /* * Below are the client handle creation routines for the various * implementations of client side rpc. They can return NULL if a * creation failure occurs. */ /* * Memory based rpc (for speed check and testing) * CLIENT * * clntraw_create(prog, vers) * u_long prog; * u_long vers; */ extern CLIENT *clntraw_create (const u_long __prog, const u_long __vers) __THROW; /* * Generic client creation routine. Supported protocols are "udp", "tcp" and * "unix" * CLIENT * * clnt_create(host, prog, vers, prot) * char *host; -- hostname * u_long prog; -- program number * u_ong vers; -- version number * char *prot; -- protocol */ extern CLIENT *clnt_create (const char *__host, const u_long __prog, const u_long __vers, const char *__prot) __THROW; /* * TCP based rpc * CLIENT * * clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz) * struct sockaddr_in *raddr; * u_long prog; * u_long version; * register int *sockp; * u_int sendsz; * u_int recvsz; */ extern CLIENT *clnttcp_create (struct sockaddr_in *__raddr, u_long __prog, u_long __version, int *__sockp, u_int __sendsz, u_int __recvsz) __THROW; /* * UDP based rpc. * CLIENT * * clntudp_create(raddr, program, version, wait, sockp) * struct sockaddr_in *raddr; * u_long program; * u_long version; * struct timeval wait_resend; * int *sockp; * * Same as above, but you specify max packet sizes. * CLIENT * * clntudp_bufcreate(raddr, program, version, wait, sockp, sendsz, recvsz) * struct sockaddr_in *raddr; * u_long program; * u_long version; * struct timeval wait_resend; * int *sockp; * u_int sendsz; * u_int recvsz; */ extern CLIENT *clntudp_create (struct sockaddr_in *__raddr, u_long __program, u_long __version, struct timeval __wait_resend, int *__sockp) __THROW; extern CLIENT *clntudp_bufcreate (struct sockaddr_in *__raddr, u_long __program, u_long __version, struct timeval __wait_resend, int *__sockp, u_int __sendsz, u_int __recvsz) __THROW; /* * AF_UNIX based rpc * CLIENT * * clntunix_create(raddr, prog, vers, sockp, sendsz, recvsz) * struct sockaddr_un *raddr; * u_long prog; * u_long version; * register int *sockp; * u_int sendsz; * u_int recvsz; */ extern CLIENT *clntunix_create (struct sockaddr_un *__raddr, u_long __program, u_long __version, int *__sockp, u_int __sendsz, u_int __recvsz) __THROW; extern int callrpc (const char *__host, const u_long __prognum, const u_long __versnum, const u_long __procnum, const xdrproc_t __inproc, const char *__in, const xdrproc_t __outproc, char *__out) __THROW; extern int _rpc_dtablesize (void) __THROW; /* * Print why creation failed */ extern void clnt_pcreateerror (const char *__msg); /* stderr */ extern char *clnt_spcreateerror(const char *__msg) __THROW; /* string */ /* * Like clnt_perror(), but is more verbose in its output */ extern void clnt_perrno (enum clnt_stat __num); /* stderr */ /* * Print an English error message, given the client error code */ extern void clnt_perror (CLIENT *__clnt, const char *__msg); /* stderr */ extern char *clnt_sperror (CLIENT *__clnt, const char *__msg) __THROW; /* string */ /* * If a creation fails, the following allows the user to figure out why. */ struct rpc_createerr { enum clnt_stat cf_stat; struct rpc_err cf_error; /* useful when cf_stat == RPC_PMAPFAILURE */ }; extern struct rpc_createerr rpc_createerr; /* * Copy error message to buffer. */ extern char *clnt_sperrno (enum clnt_stat __num) __THROW; /* string */ /* * get the port number on the host for the rpc program,version and proto */ extern int getrpcport (const char * __host, u_long __prognum, u_long __versnum, u_int __proto) __THROW; /* * get the local host's IP address without consulting * name service library functions */ extern void get_myaddress (struct sockaddr_in *) __THROW; #define UDPMSGSIZE 8800 /* rpc imposed limit on udp msg size */ #define RPCSMALLMSGSIZE 400 /* a more reasonable packet size */ __END_DECLS #endif /* rpc/clnt.h */