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RPC(3N)                                                                                              RPC(3N)



NAME
       rpc - library routines for remote procedure calls

SYNOPSIS AND DESCRIPTION
       These routines allow C programs to make procedure calls on other machines across the network.  First,
       the client calls a procedure to send a data packet to the server.  Upon receipt of  the  packet,  the
       server  calls  a  dispatch  routine  to  perform  the requested service, and then sends back a reply.
       Finally, the procedure call returns to the client.

       Routines that are used for Secure RPC (DES authentication) are described in  rpc_secure(3N).   Secure
       RPC can be used only if DES encryption is available.

       #include <rpc/rpc.h>

       void
       auth_destroy(auth)
       AUTH *auth;

              A  macro  that destroys the authentication information associated with auth.  Destruction usu-ally usually
              ally involves deallocation of private data structures. The use  of  auth  is  undefined  after
              calling auth_destroy().

       AUTH *
       authnone_create()

              Create  and returns an RPC authentication handle that passes nonusable authentication informa-tion information
              tion with each remote procedure call. This is the default authentication used by RPC.

       AUTH *
       authunix_create(host, uid, gid, len, aup_gids)
       char *host;
       int uid, gid, len, *aup.gids;

              Create and return an RPC authentication handle that contains authentication information.   The
              parameter  host  is  the  name of the machine on which the information was created; uid is the
              user's user ID ; gid is the user's current group ID ; len and  aup_gids  refer  to  a  counted
              array of groups to which the user belongs.  It is easy to impersonate a user.

       AUTH *
       authunix_create_default()

              Calls authunix_create() with the appropriate parameters.

       callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out)
       char *host;
       u_long prognum, versnum, procnum;
       char *in, *out;
       xdrproc_t inproc, outproc;

              Call  the remote procedure associated with prognum, versnum, and procnum on the machine, host.
              The parameter in is the address of the procedure's argument(s), and  out  is  the  address  of
              where to place the result(s); inproc is used to encode the procedure's parameters, and outproc
              is used to decode the procedure's results.  This routine returns zero if it succeeds,  or  the
              value  of  enum  clnt_stat cast to an integer if it fails.  The routine clnt_perrno() is handy
              for translating failure statuses into messages.

              Warning: calling remote  procedures  with  this  routine  uses  UDP/IP  as  a  transport;  see
              clntudp_create()  for  restrictions.   You  do  not have control of timeouts or authentication
              using this routine.

       enum clnt_stat
       clnt_broadcast(prognum, versnum, procnum, inproc, in, outproc, out, eachresult)
       u_long prognum, versnum, procnum;
       char *in, *out;
       xdrproc_t inproc, outproc;
       resultproc_t eachresult;

              Like callrpc(), except the call message is broadcast to all locally connected broadcast  nets.
              Each time it receives a response, this routine calls eachresult(), whose form is:

                 eachresult(out, addr)
                 char *out;
                 struct sockaddr_in *addr;

              where  out  is  the same as out passed to clnt_broadcast(), except that the remote procedure's
              output is decoded there; addr points to the address of the machine that sent the results.   If
              eachresult()  returns zero, clnt_broadcast() waits for more replies; otherwise it returns with
              appropriate status.

              Warning: broadcast sockets are limited in size to the maximum transfer unit of the data  link.
              For ethernet, this value is 1500 bytes.

       enum clnt_stat
       clnt_call(clnt, procnum, inproc, in, outproc, out, tout)
       CLIENT *clnt;
       u_long
       procnum;
       xdrproc_t inproc, outproc;
       char *in, *out;
       struct timeval tout;

              A macro that calls the remote procedure procnum associated with the client handle, clnt, which
              is obtained with an RPC client creation routine such as clnt_create().  The  parameter  in  is
              the  address  of  the  procedure's  argument(s),  and out is the address of where to place the
              result(s); inproc is used to encode the procedure's parameters, and outproc is used to  decode
              the procedure's results; tout is the time allowed for results to come back.

       clnt_destroy(clnt)
       CLIENT *clnt;

              A  macro  that  destroys the client's RPC handle. Destruction usually involves deallocation of
              private data structures, including clnt itself.   Use  of  clnt  is  undefined  after  calling
              clnt_destroy().  If the RPC library opened the associated socket, it will close it also.  Oth-erwise, Otherwise,
              erwise, the socket remains open.

       CLIENT *
       clnt_create(host, prog, vers, proto)
       char *host;
       u_long prog, vers;
       char *proto;

              Generic client creation routine.  host identifies the name of the remote host where the server
              is  located.  proto indicates which kind of transport protocol to use. The currently supported
              values for this field are "udp" and "tcp".  Default timeouts are  set,  but  can  be  modified
              using clnt_control().

              Warning:  Using  UDP has its shortcomings.  Since UDP-based RPC messages can only hold up to 8
              Kbytes of encoded data, this transport cannot be used for procedures that take large arguments
              or return huge results.

       bool_t
       clnt_control(cl, req, info)
       CLIENT *cl;
       char *info;

              A  macro  used to change or retrieve various information about a client object.  req indicates
              the type of operation, and info is a pointer to the information. For both  UDP  and  TCP,  the
              supported values of req and their argument types and what they do are:

              CLSET_TIMEOUT       struct timeval      set total timeout
              CLGET_TIMEOUT       struct timeval      get total timeout

              Note: if you set the timeout using clnt_control(), the timeout parameter passed to clnt_call()
              will be ignored in all future calls.

              CLGET_SERVER_ADDR   struct sockaddr_in  get server's address

              The following operations are valid for UDP only:

              CLSET_RETRY_TIMEOUT                     struct timeval      set the retry timeout
              CLGET_RETRY_TIMEOUT                     struct timeval      get the retry timeout

              The retry timeout is the time that UDP RPC waits for the server to reply before retransmitting
              the request.

       clnt_freeres(clnt, outproc, out)
       CLIENT *clnt;
       xdrproc_t outproc;
       char *out;

              A  macro that frees any data allocated by the RPC/XDR system when it decoded the results of an
              RPC call.  The parameter out is the address of the results, and outproc  is  the  XDR  routine
              describing  the results.  This routine returns one if the results were successfully freed, and
              zero otherwise.

       void
       clnt_geterr(clnt, errp)
       CLIENT *clnt;
       struct rpc_err *errp;

              A macro that copies the error structure out of the client handle to the structure  at  address
              errp.

       void
       clnt_pcreateerror(s)
       char *s;

              Print  a  message  to  standard error indicating why a client RPC handle could not be created.
              The message is prepended with string s and a colon.  Used when a  clnt_create(),  clntraw_cre-ate(), clntraw_create(),
              ate(), clnttcp_create(), or clntudp_create() call fails.

       void
       clnt_perrno(stat)
       enum clnt_stat stat;

              Print  a  message  to  standard  error corresponding to the condition indicated by stat.  Used
              after callrpc().

       clnt_perror(clnt, s)
       CLIENT *clnt;
       char *s;

              Print a message to standard error indicating why an RPC call failed; clnt is the  handle  used
              to  do the call.  The message is prepended with string s and a colon.  Used after clnt_call().

       char *
       clnt_spcreateerror
       char *s;

              Like clnt_pcreateerror(), except that it returns a string instead of printing to the  standard
              error.

              Bugs: returns pointer to static data that is overwritten on each call.

       char *
       clnt_sperrno(stat)
       enum clnt_stat stat;

              Take  the  same  arguments  as clnt_perrno(), but instead of sending a message to the standard
              error indicating why an RPC call failed, return a pointer to a string which contains the  mes-sage. message.
              sage.  The string ends with a NEWLINE.

              clnt_sperrno()  is used instead of clnt_perrno() if the program does not have a standard error
              (as a program running as a server quite likely does not), or if the programmer does  not  want
              the  message to be output with printf, or if a message format different than that supported by
              clnt_perrno() is to be used.  Note: unlike clnt_sperror() and clnt_spcreaterror(),  clnt_sper-rno() clnt_sperrno()
              rno() returns pointer to static data, but the result will not get overwritten on each call.

       char *
       clnt_sperror(rpch, s)
       CLIENT *rpch;
       char *s;

              Like  clnt_perror(), except that (like clnt_sperrno()) it returns a string instead of printing
              to standard error.

              Bugs: returns pointer to static data that is overwritten on each call.

       CLIENT *
       clntraw_create(prognum, versnum)
       u_long prognum, versnum;

              This routine creates a toy RPC client for the remote program prognum,  version  versnum.   The
              transport  used  to  pass  messages  to  the service is actually a buffer within the process's
              address space, so the corresponding RPC server should live in  the  same  address  space;  see
              svcraw_create().   This  allows  simulation  of  RPC and acquisition of RPC overheads, such as
              round trip times, without any kernel interference. This routine returns NULL if it fails.

       CLIENT *
       clnttcp_create(addr, prognum, versnum, sockp, sendsz, recvsz)
       struct sockaddr_in *addr;
       u_long prognum, versnum;
       int *sockp;
       u_int sendsz, recvsz;

              This routine creates an RPC client for the remote program prognum, version versnum; the client
              uses  TCP/IP  as  a  transport.  The  remote program is located at Internet address *addr.  If
              addr->sin_port is zero, then it is set to the actual port that the remote program is listening
              on  (the  remote  portmap service is consulted for this information). The parameter sockp is a
              socket; if it is RPC_ANYSOCK, then this routine opens a new one and sets  sockp.   Since  TCP-based TCPbased
              based  RPC  uses  buffered I/O , the user may specify the size of the send and receive buffers
              with the parameters sendsz and recvsz; values of zero choose suitable defaults.  This  routine
              returns NULL if it fails.

       CLIENT *
       clntudp_create(addr, prognum, versnum, wait, sockp)
       struct sockaddr_in *addr;
       u_long prognum, versnum;
       struct timeval wait;
       int *sockp;

              This routine creates an RPC client for the remote program prognum, version versnum; the client
              uses use UDP/IP as a transport. The remote program is located at Internet  address  addr.   If
              addr->sin_port  is zero, then it is set to actual port that the remote program is listening on
              (the remote portmap service is consulted for this  information).  The  parameter  sockp  is  a
              socket;  if  it  is  RPC_ANYSOCK,  then  this routine opens a new one and sets sockp.  The UDP
              transport resends the call message in intervals of wait time until a response is  received  or
              until  the  call  times  out.   The  total  time  for  the  call  to  time out is specified by
              clnt_call().

              Warning: since UDP-based RPC messages can only hold up to  8  Kbytes  of  encoded  data,  this
              transport cannot be used for procedures that take large arguments or return huge results.

       CLIENT *
       clntudp_bufcreate(addr, prognum, versnum, wait, sockp, sendsize, recosize)
       struct sockaddr_in *addr;
       u_long prognum, versnum;
       struct timeval wait;
       int *sockp;
       unsigned int sendsize;
       unsigned int recosize;

              This routine creates an RPC client for the remote program prognum, on versnum; the client uses
              use UDP/IP as a transport. The remote  program  is  located  at  Internet  address  addr.   If
              addr->sin_port  is zero, then it is set to actual port that the remote program is listening on
              (the remote portmap service is consulted for this  information).  The  parameter  sockp  is  a
              socket;  if  it  is  RPC_ANYSOCK,  then  this routine opens a new one and sets sockp.  The UDP
              transport resends the call message in intervals of wait time until a response is  received  or
              until  the  call  times  out.   The  total  time  for  the  call  to  time out is specified by
              clnt_call().

              This allows the user to specify the maximun packet size for sending  and  receiving  UDP-based
              RPC messages.

       void
       get_myaddress(addr)
       struct sockaddr_in *addr;

              Stuff  the  machine's IP address into *addr, without consulting the library routines that deal
              with /etc/hosts.  The port number is always set to htons(PMAPPORT).

       struct pmaplist *
       pmap_getmaps(addr)
       struct sockaddr_in *addr;

              A user interface to the portmap service, which returns a list of the current  RPC  program-to-port program-toport
              port  mappings  on  the host located at IP address *addr.  This routine can return NULL .  The
              command `rpcinfo -p' uses this routine.

       u_short
       pmap_getport(addr, prognum, versnum, protocol)
       struct sockaddr_in *addr;
       u_long prognum, versnum, protocol;

              A user interface to the portmap service, which returns the port number on which waits  a  ser-vice service
              vice  that supports program number prognum, version versnum, and speaks the transport protocol
              associated with protocol.  The value of protocol is most likely IPPROTO_UDP or IPPROTO_TCP.  A
              return  value of zero means that the mapping does not exist or that the RPC system failured to
              contact the remote portmap service.  In the latter case, the global  variable  rpc_createerr()
              contains the RPC status.

       enum clnt_stat
       pmap_rmtcall(addr, prognum, versnum, procnum, inproc, in, outproc, out, tout, portp)
       struct sockaddr_in *addr;
       u_long prognum, versnum, procnum;
       char *in, *out;
       xdrproc_t inproc, outproc;
       struct timeval tout;
       u_long *portp;

              A  user  interface  to  the portmap service, which instructs portmap on the host at IP address
              *addr to make an RPC call on your behalf to a procedure on that host.   The  parameter  *portp
              will  be  modified  to the program's port number if the procedure succeeds. The definitions of
              other parameters are discussed in callrpc() and clnt_call().  This procedure  should  be  used
              for a "ping" and nothing else.  See also clnt_broadcast().

       pmap_set(prognum, versnum, protocol, port)
       u_long prognum, versnum, protocol;
       u_short port;

              A  user  interface  to  the  portmap  service,  which establishes a mapping between the triple
              [prognum,versnum,protocol] and port on the machine's portmap service. The value of protocol is
              most  likely IPPROTO_UDP or IPPROTO_TCP.  This routine returns one if it succeeds, zero other-wise. otherwise.
              wise.  Automatically done by svc_register().

       pmap_unset(prognum, versnum)
       u_long prognum, versnum;

              A user interface to the portmap  service,  which  destroys  all  mapping  between  the  triple
              [prognum,versnum,*] and ports on the machine's portmap service. This routine returns one if it
              succeeds, zero otherwise.

       registerrpc(prognum, versnum, procnum, procname, inproc, outproc)
       u_long prognum, versnum, procnum;
       char *(*procname) () ;
       xdrproc_t inproc, outproc;

              Register procedure procname with the RPC service package.  If a request  arrives  for  program
              prognum,  version  versnum,  and  procedure  procnum, procname is called with a pointer to its
              parameter(s); progname should return a pointer to its static  result(s);  inproc  is  used  to
              decode  the parameters while outproc is used to encode the results.  This routine returns zero
              if the registration succeeded, -1 otherwise.

              Warning: remote procedures registered in this form are accessed using  the  UDP/IP  transport;
              see svcudp_create() for restrictions.

       struct rpc_createerr     rpc_createerr;

              A global variable whose value is set by any RPC client creation routine that does not succeed.
              Use the routine clnt_pcreateerror() to print the reason why.

       svc_destroy(xprt)
       SVCXPRT *
       xprt;

              A macro that destroys the RPC service transport handle, xprt.   Destruction  usually  involves
              deallocation  of  private  data  structures,  including xprt itself.  Use of xprt is undefined
              after calling this routine.

       fd_set svc_fdset;

              A global variable reflecting the RPC service side's read file descriptor bit mask; it is suit-able suitable
              able as a parameter to the select system call. This is only of interest if a service implemen-tor implementor
              tor does not call svc_run(), but rather does his  own  asynchronous  event  processing.   This
              variable  is  read-only (do not pass its address to select!), yet it may change after calls to
              svc_getreqset() or any creation routines.

       int svc_fds;

              Similar to svc_fedset(), but limited  to  32  descriptors.  This  interface  is  obsoleted  by
              svc_fdset().

       svc_freeargs(xprt, inproc, in)
       SVCXPRT *xprt;
       xdrproc_t inproc;
       char *in;

              A macro that frees any data allocated by the RPC/XDR system when it decoded the arguments to a
              service procedure using svc_getargs().  This routine returns 1 if the  results  were  success-fully successfully
              fully freed, and zero otherwise.

       svc_getargs(xprt, inproc, in)
       SVCXPRT *xprt;
       xdrproc_t inproc;
       char *in;

              A macro that decodes the arguments of an RPC request associated with the RPC service transport
              handle, xprt.  The parameter in is the address where the arguments will be placed;  inproc  is
              the  XDR routine used to decode the arguments.  This routine returns one if decoding succeeds,
              and zero otherwise.

       struct sockaddr_in *
       svc_getcaller(xprt)
       SVCXPRT *xprt;

              The approved way of getting the network address of the caller of a procedure  associated  with
              the RPC service transport handle, xprt.

       svc_getreqset(rdfds)
       fd_set *rdfds;

              This routine is only of interest if a service implementor does not call svc_run(), but instead
              implements custom asynchronous event processing.  It is called when the select system call has
              determined that an RPC request has arrived on some RPC socket(s) ; rdfds is the resultant read
              file descriptor bit mask.  The routine returns when all sockets associated with the  value  of
              rdfds have been serviced.

       svc_getreq(rdfds)
       int rdfds;

              Similar  to  svc_getreqset(),  but  limited  to 32 descriptors. This interface is obsoleted by
              svc_getreqset().

       svc_register(xprt, prognum, versnum, dispatch, protocol)
       SVCXPRT *xprt;
       u_long prognum, versnum;
       void (*dispatch) ();
       u_long protocol;

              Associates prognum and versnum with the service dispatch procedure, dispatch.  If protocol  is
              zero, the service is not registered with the portmap service.  If protocol is non-zero, then a
              mapping of the triple [prognum,versnum,protocol] to  xprt->xp_port  is  established  with  the
              local  portmap  service (generally protocol is zero, IPPROTO_UDP or IPPROTO_TCP ).  The proce-dure procedure
              dure dispatch has the following form:
                 dispatch(request, xprt)
                 struct svc_req *request;
                 SVCXPRT *xprt;

              The svc_register() routine returns one if it succeeds, and zero otherwise.

       svc_run()

              This routine never returns. It waits for RPC requests to arrive,  and  calls  the  appropriate
              service procedure using svc_getreq() when one arrives. This procedure is usually waiting for a
              select() system call to return.

       svc_sendreply(xprt, outproc, out)
       SVCXPRT *xprt;
       xdrproc_t outproc;
       char *out;

              Called by an RPC service's dispatch routine to send the results of a  remote  procedure  call.
              The  parameter  xprt  is the request's associated transport handle; outproc is the XDR routine
              which is used to encode the results; and out is the address  of  the  results.   This  routine
              returns one if it succeeds, zero otherwise.

       void
       svc_unregister(prognum, versnum)
       u_long prognum, versnum;

              Remove  all  mapping  of  the double [prognum,versnum] to dispatch routines, and of the triple
              [prognum,versnum,*] to port number.

       void
       svcerr_auth(xprt, why)
       SVCXPRT *xprt;
       enum auth_stat why;

              Called by a service dispatch routine that refuses to perform a remote procedure call due to an
              authentication error.

       void
       svcerr_decode(xprt)
       SVCXPRT *xprt;

              Called  by a service dispatch routine that cannot successfully decode its parameters. See also
              svc_getargs().

       void
       svcerr_noproc(xprt)
       SVCXPRT *xprt;

              Called by a service dispatch routine that does not implement the  procedure  number  that  the
              caller requests.

       void
       svcerr_noprog(xprt)
       SVCXPRT *xprt;

              Called  when  the desired program is not registered with the RPC package. Service implementors
              usually do not need this routine.

       void
       svcerr_progvers(xprt)
       SVCXPRT *xprt;

              Called when the desired version of a program is not registered with the RPC  package.  Service
              implementors usually do not need this routine.

       void
       svcerr_systemerr(xprt)
       SVCXPRT *xprt;

              Called by a service dispatch routine when it detects a system error not covered by any partic-ular particular
              ular protocol.  For example, if a service can no longer allocate storage,  it  may  call  this
              routine.

       void
       svcerr_weakauth(xprt)
       SVCXPRT *xprt;

              Called  by  a  service dispatch routine that refuses to perform a remote procedure call due to
              insufficient authentication parameters.  The routine calls svcerr_auth(xprt, AUTH_TOOWEAK).

       SVCXPRT *
       svcraw_create()

              This routine creates a toy RPC service transport, to which it returns a pointer.   The  trans-port transport
              port  is  really  a buffer within the process's address space, so the corresponding RPC client
              should live in the same address space; see clntraw_create().  This routine  allows  simulation
              of  RPC and acquisition of RPC overheads (such as round trip times), without any kernel inter-ference. interference.
              ference.  This routine returns NULL if it fails.

       SVCXPRT *
       svctcp_create(sock, send_buf_size, recv_buf_size)
       int sock;
       u_int send_buf_size, recv_buf_size;

              This routine creates a TCP/IP-based RPC service transport, to which it returns a pointer.  The
              transport  is  associated  with the socket sock, which may be RPC_ANYSOCK, in which case a new
              socket is created.  If the socket is not bound to a local TCP port, then this routine binds it
              to  an  arbitrary  port.  Upon completion, xprt->xp_sock is the transport's socket descriptor,
              and xprt->xp_port is the transport's port number.  This routine  returns  NULL  if  it  fails.
              Since  TCP-based RPC uses buffered I/O , users may specify the size of buffers; values of zero
              choose suitable defaults.

       SVCXPRT *
       svcfd_create(fd, sendsize, recvsize)
       int fd;
       u_int sendsize;
       u_int recvsize;

              Create a service on top of any open descriptor. Typically,  this  descriptor  is  a  connected
              socket  for  a stream protocol such as TCP.  sendsize and recvsize indicate sizes for the send
              and receive buffers.  If they are zero, a reasonable default is chosen.

       SVCXPRT *
       svcudp_bufcreate(sock, sendsize, recosize)
       int sock;

              This routine creates a UDP/IP-based RPC service transport, to which it returns a pointer.  The
              transport  is  associated with the socket sock, which may be RPC_ANYSOCK , in which case a new
              socket is created.  If the socket is not bound to a local UDP port, then this routine binds it
              to an arbitrary port. Upon completion, xprt->xp_sock is the transport's socket descriptor, and
              xprt->xp_port is the transport's port number.  This routine returns NULL if it fails.

              This allows the user to specify the maximun packet size for sending  and  receiving  UDP-based
              RPC messages.

       xdr_accepted_reply(xdrs, ar)
       XDR *xdrs;
       struct accepted_reply *ar;

              Used  for  encoding  RPC reply messages. This routine is useful for users who wish to generate
              RPC-style messages without using the RPC package.

       xdr_authunix_parms(xdrs, aupp)
       XDR *xdrs;
       struct authunix_parms *aupp;

              Used for describing UNIX credentials. This routine is useful for users who  wish  to  generate
              these credentials without using the RPC authentication package.

       void
       xdr_callhdr(xdrs, chdr)
       XDR *xdrs;
       struct rpc_msg *chdr;

              Used  for  describing  RPC call header messages.  This routine is useful for users who wish to
              generate RPC-style messages without using the RPC package.

       xdr_callmsg(xdrs, cmsg)
       XDR *xdrs;
       struct rpc_msg *cmsg;

              Used for describing RPC call messages.  This routine is useful for users who wish to  generate
              RPC-style messages without using the RPC package.

       xdr_opaque_auth(xdrs, ap)
       XDR *xdrs;
       struct opaque_auth *ap;

              Used for describing RPC authentication information messages.  This routine is useful for users
              who wish to generate RPC-style messages without using the RPC package.

       xdr_pmap(xdrs, regs)
       XDR *xdrs;
       struct pmap *regs;

              Used for describing parameters to various portmap procedures,  externally.   This  routine  is
              useful for users who wish to generate these parameters without using the pmap interface.

       xdr_pmaplist(xdrs, rp)
       XDR *xdrs;
       struct pmaplist **rp;

              Used for describing a list of port mappings, externally.  This routine is useful for users who
              wish to generate these parameters without using the pmap interface.

       xdr_rejected_reply(xdrs, rr)
       XDR *xdrs;
       struct rejected_reply *rr;

              Used for describing RPC reply messages.  This routine is useful for users who wish to generate
              RPC-style messages without using the RPC package.

       xdr_replymsg(xdrs, rmsg)
       XDR *xdrs;
       struct rpc_msg *rmsg;

              Used for describing RPC reply messages.  This routine is useful for users who wish to generate
              RPC style messages without using the RPC package.

       void
       xprt_register(xprt)
       SVCXPRT *xprt;

              After RPC service transport handles are created, they should register themselves with the  RPC
              service  package.   This routine modifies the global variable svc_fds().  Service implementors
              usually do not need this routine.

       void
       xprt_unregister(xprt)
       SVCXPRT *xprt;

              Before an RPC service transport handle is destroyed, it should unregister itself with the  RPC
              service  package.   This routine modifies the global variable svc_fds().  Service implementors
              usually do not need this routine.

SEE ALSO
       rpc_secure(3N), xdr(3N)
       The following manuals:
              Remote Procedure Calls: Protocol Specification
              Remote Procedure Call Programming Guide
              rpcgen Programming Guide
       RPC: Remote Procedure Call Protocol Specification, RFC1050, Sun Microsystems, Inc., USC-ISI.




                                              16 February 1988                                       RPC(3N)

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