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RPC(3)			   Linux Programmer's Manual			RPC(3)



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.

       To take use of these routines, include the header file <rpc/rpc.h>.

       The prototypes below make use of the following types:

	   typedef int bool_t;

	   typedef bool_t (*xdrproc_t) (XDR *, void *, ...);

	   typedef bool_t (*resultproc_t) (caddr_t resp,
					   struct sockaddr_in *raddr);

       See the header files for the declarations of the AUTH, CLIENT, SVCXPRT,
       and XDR types.

       void auth_destroy(AUTH *auth);

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

       AUTH *authnone_create(void);

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

       AUTH *authunix_create(char *host, int uid, int gid,
			     int len, int *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(void);

	      Calls authunix_create() with the appropriate parameters.

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

	      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 rou-
	      tine.

       enum clnt_stat clnt_broadcast(unsigned long prognum,
			    unsigned long versnum, unsigned long procnum,
			    xdrproc_t inproc, char *in,
			    xdrproc_t outproc, char *out,
			    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(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 eachre-
	      sult()  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(CLIENT *clnt, unsigned long procnum,
			   xdrproc_t inproc, char *in,
			   xdrproc_t outproc, char *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 proce-
	      dure's results; tout is the time allowed	for  results  to  come
	      back.

       clnt_destroy(CLIENT *clnt);

	      A macro that destroys the client's RPC handle.  Destruction usu-
	      ally 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.	 Otherwise, the socket remains
	      open.

       CLIENT *clnt_create(char *host, unsigned long prog,
			   unsigned long 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  sup-
	      ported values for this field are "udp" and "tcp".	 Default time-
	      outs are set, but can be modified using clnt_control().

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

       bool_t clnt_control(CLIENT *cl, int req, 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 sup-
	      ported 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(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  describ-
	      ing  the	results.  This routine returns one if the results were
	      successfully freed, and zero otherwise.

       void clnt_geterr(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(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(), clnttcp_create(), or clntudp_create() call fails.

       void clnt_perrno(enum clnt_stat stat);

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

       clnt_perror(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(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 message.
	      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(3), or if a message format dif-
	      ferent than that supported  by  clnt_perrno()  is	 to  be	 used.
	      Note: unlike clnt_sperror() and clnt_spcreateerror(), clnt_sper-
	      rno() returns pointer to static data, but the  result  will  not
	      get overwritten on each call.

       char *clnt_sperror(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(unsigned long prognum, unsigned long 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(struct sockaddr_in *addr,
		       unsigned long prognum, unsigned long versnum,
		       int *sockp, unsigned int sendsz, unsigned int 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 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(struct sockaddr_in *addr,
		       unsigned long prognum, unsigned long 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 trans-
	      port.  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	 hold  only  up	 to  8
	      Kbytes of encoded data, this transport cannot be used for proce-
	      dures that take large arguments or return huge results.

       CLIENT *clntudp_bufcreate(struct sockaddr_in *addr,
		   unsigned long prognum, unsigned long 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  maximum  packet  size  for
	      sending and receiving UDP-based RPC messages.

       void get_myaddress(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(struct sockaddr_in *addr);

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

       unsigned short pmap_getport(struct sockaddr_in *addr,
			   unsigned long prognum, unsigned long versnum,
			   unsigned int protocol);

	      A user interface to the portmap service, which returns the  port
	      number  on  which	 waits	a service 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 failed to con-
	      tact the remote portmap service.	In the latter case, the global
	      variable rpc_createerr contains the RPC status.

       enum clnt_stat pmap_rmtcall(struct sockaddr_in *addr,
			   unsigned long prognum, unsigned long versnum,
			   unsigned long procnum,
			   xdrproc_t inproc, char *in,
			   xdrproc_t outproc, char *out,
			   struct timeval tout, unsigned 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  suc-
	      ceeds.   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().

       bool_t pmap_set(unsigned long prognum, unsigned long versnum,
		       unsigned int protocol, unsigned 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 otherwise.  Automatically done by svc_regis-
	      ter().

       bool_t pmap_unset(unsigned long prognum, unsigned long versnum);

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

       int registerrpc(unsigned long prognum, unsigned long versnum,
		       unsigned long procnum, char *(*procname)(char *),
		       xdrproc_t inproc, xdrproc_t outproc);

	      Register	procedure procname with the RPC service package.  If a
	      request arrives for program prognum, version versnum, and proce-
	      dure  procnum,  procname is called with a pointer to its parame-
	      ter(s);  procname	 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  restric-
	      tions.

       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_pcreateer-
	      ror() to print the reason why.

       void svc_destroy(SVCXPRT *xprt);

	      A	 macro	that  destroys the RPC service transport handle, xprt.
	      Destruction usually involves deallocation of private data struc-
	      tures,  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  suitable	as  a parameter to the
	      select(2) system call.  This is of interest only	if  a  service
	      implementor   does  their	 own  asynchronous  event  processing,
	      instead of calling svc_run().  This variable  is	read-only  (do
	      not  pass	 its  address  to select(2)!), yet it may change after
	      calls to svc_getreqset() or any creation routines.

       int svc_fds;

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

       svc_freeargs(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 suc-
	      cessfully freed, and zero otherwise.

       svc_getargs(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(SVCXPRT *xprt);

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

       void svc_getreqset(fd_set *rdfds);

	      This routine is of interest only if a service  implementor  does
	      not  call	 svc_run(), but instead implements custom asynchronous
	      event processing.	 It is called when the select(2)  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.

       void svc_getreq(int rdfds);

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

       bool_t svc_register(SVCXPRT *xprt, unsigned long prognum,
			   unsigned long versnum,
			   void (*dispatch)(svc_req *, SVCXPRT *),
			   unsigned long protocol);

	      Associates  prognum and versnum with the service dispatch proce-
	      dure, dispatch.  If protocol is zero, the service is not	regis-
	      tered  with the portmap service.	If protocol is nonzero, 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
	      procedure dispatch has the following form:

		  dispatch(struct svc_req *request, SVCXPRT *xprt);

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

       void svc_run(void);

	      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	 wait-
	      ing for a select(2) system call to return.

       bool_t svc_sendreply(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 other-
	      wise.

       void svc_unregister(unsigned long prognum, unsigned long versnum);

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

       void svcerr_auth(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(SVCXPRT *xprt);

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

       void svcerr_noproc(SVCXPRT *xprt);

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

       void svcerr_noprog(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(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(SVCXPRT *xprt);

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

       void svcerr_weakauth(SVCXPRT *xprt);

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

       SVCXPRT *svcfd_create(int fd, unsigned int sendsize,
			     unsigned 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 cho-
	      sen.

       SVCXPRT *svcraw_create(void);

	      This routine creates a toy RPC service transport,	 to  which  it
	      returns  a pointer.  The transport 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 rou-
	      tine 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.

       SVCXPRT *svctcp_create(int sock, unsigned int send_buf_size,
			      unsigned int 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 *svcudp_bufcreate(int sock, unsigned int sendsize,
				 unsigned int recosize);

	      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  maximum  packet  size  for
	      sending and receiving UDP-based RPC messages.

       SVCXPRT *svcudp_create(int sock);

	      This call is equivalent to svcudp_bufcreate(sock,SZ,SZ) for some
	      default size SZ.

       bool_t xdr_accepted_reply(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.

       bool_t xdr_authunix_parms(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(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.

       bool_t xdr_callmsg(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.

       bool_t xdr_opaque_auth(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.

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

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

       bool_t xdr_pmaplist(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 parame-
	      ters without using the pmap interface.

       bool_t xdr_rejected_reply(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.

       bool_t xdr_replymsg(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(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 usu-
	      ally do not need this routine.

       void xprt_unregister(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 usu-
	      ally do not need this routine.

ATTRIBUTES
       For  an	explanation  of	 the  terms  used   in	 this	section,   see
       attributes(7).

       +------------------------------------+---------------+---------+
       |Interface			    | Attribute	    | Value   |
       +------------------------------------+---------------+---------+
       |auth_destroy(), authnone_create(),  | Thread safety | MT-Safe |
       |authunix_create(),		    |		    |	      |
       |authunix_create_default(),	    |		    |	      |
       |callrpc(), clnt_broadcast(),	    |		    |	      |
       |clnt_call(), clnt_destroy(),	    |		    |	      |
       |clnt_create(), clnt_control(),	    |		    |	      |
       |clnt_freeres(), clnt_geterr(),	    |		    |	      |
       |clnt_pcreateerror(), clnt_perrno(), |		    |	      |
       |clnt_perror(),			    |		    |	      |
       |clnt_spcreateerror(),		    |		    |	      |
       |clnt_sperrno(), clnt_sperror(),	    |		    |	      |
       |clntraw_create(), clnttcp_create(), |		    |	      |
       |clntudp_create(),		    |		    |	      |
       |clntudp_bufcreate(),		    |		    |	      |
       |get_myaddress(), pmap_getmaps(),    |		    |	      |
       |pmap_getport(), pmap_rmtcall(),	    |		    |	      |
       |pmap_set(), pmap_unset(),	    |		    |	      |
       |registerrpc(), svc_destroy(),	    |		    |	      |
       |svc_freeargs(), svc_getargs(),	    |		    |	      |
       |svc_getcaller(), svc_getreqset(),   |		    |	      |
       |svc_getreq(), svc_register(),	    |		    |	      |
       |svc_run(), svc_sendreply(),	    |		    |	      |
       |svc_unregister(), svcerr_auth(),    |		    |	      |
       |svcerr_decode(), svcerr_noproc(),   |		    |	      |
       |svcerr_noprog(), svcerr_progvers(), |		    |	      |
       |svcerr_systemerr(),		    |		    |	      |
       |svcerr_weakauth(),		    |		    |	      |
       |svcfd_create(), svcraw_create(),    |		    |	      |
       |svctcp_create(),		    |		    |	      |
       |svcudp_bufcreate(),		    |		    |	      |
       |svcudp_create(),		    |		    |	      |
       |xdr_accepted_reply(),		    |		    |	      |
       |xdr_authunix_parms(),		    |		    |	      |
       |xdr_callhdr(),			    |		    |	      |
       |xdr_callmsg(), xdr_opaque_auth(),   |		    |	      |
       |xdr_pmap(), xdr_pmaplist(),	    |		    |	      |
       |xdr_rejected_reply(),		    |		    |	      |
       |xdr_replymsg(),			    |		    |	      |
       |xprt_register(), xprt_unregister()  |		    |	      |
       +------------------------------------+---------------+---------+

SEE ALSO
       xdr(3)

       The following manuals:
	      Remote Procedure Calls: Protocol Specification
	      Remote Procedure Call Programming Guide
	      rpcgen Programming Guide

       RPC:  Remote  Procedure	Call  Protocol	Specification,	RFC 1050,  Sun
       Microsystems, Inc., USC-ISI.

COLOPHON
       This page is part of release 4.04 of the Linux  man-pages  project.   A
       description  of	the project, information about reporting bugs, and the
       latest	 version    of	  this	  page,	   can	   be	  found	    at
       http://www.kernel.org/doc/man-pages/.



				  2015-07-23				RPC(3)