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RPCBIND(8)                BSD System Manager's Manual               RPCBIND(8)

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NAME
     rpcbind -- universal addresses to RPC program number mapper

SYNOPSIS
     rpcbind [-adhiLlsr]

DESCRIPTION
     The rpcbind utility is a server that converts RPC program numbers into
     universal addresses.  It must be running on the host to be able to make
     RPC calls on a server on that machine.

     When an RPC service is started, it tells rpcbind the address at which it
     is listening, and the RPC program numbers it is prepared to serve.  When
     a client wishes to make an RPC call to a given program number, it first
     contacts rpcbind on the server machine to determine the address where RPC
     requests should be sent.

     The rpcbind utility should be started before any other RPC service.  Nor-
     mally, standard RPC servers are started by port monitors, so rpcbind must
     be started before port monitors are invoked.

     When rpcbind is started, it checks that certain name-to-address transla-
     tion-calls function correctly.  If they fail, the network configuration
     databases may be corrupt.  Since RPC services cannot function correctly
     in this situation, rpcbind reports the condition and terminates.

     The rpcbind utility can only be started by the super-user.

OPTIONS
     -a      When debugging (-d), do an abort on errors.

     -d      Run in debug mode.  In this mode, rpcbind will log additional in-
             formation during operation, and will abort on certain errors if
             -a is also specified.  With this option, the name-to-address
             translation consistency checks are shown in detail.

     -f      Do not fork and become a background process.

     -h      Specify specific IP addresses to bind to for UDP requests.  This
             option may be specified multiple times and can be used to re-
             strict the interfaces rpcbind will respond to.  When specifying
             IP addresses with -h, rpcbind will automatically add 127.0.0.1
             and if IPv6 is enabled, ::1 to the list.  If no -h option is
             specified, rpcbind will bind to INADDR_ANY, which could lead to
             problems on a multi-homed host due to rpcbind returning a UDP
             packet from a different IP address than it was sent to.  Note
             that when rpcbind is controlled via systemd's socket activation,
             the -h option is ignored. In this case, you need to edit the
             ListenStream and ListenDgram definitions in
             /usr/lib/systemd/system/rpcbind.socket instead.

     -i      "Insecure" mode.  Allow calls to SET and UNSET from any host.
             Normally rpcbind accepts these requests only from the loopback
             interface for security reasons.  This change is necessary for
             programs that were compiled with earlier versions of the rpc li-
             brary and do not make those requests using the loopback inter-
             face.

     -l      Turn on libwrap connection logging.

     -s      Cause rpcbind to change to the user daemon as soon as possible.
             This causes rpcbind to use non-privileged ports for outgoing con-
             nections, preventing non-privileged clients from using rpcbind to
             connect to services from a privileged port.

     -w      Cause rpcbind to do a "warm start" by read a state file when
             rpcbind starts up. The state file is created when rpcbind termi-
             nates.

     -r      Turn on remote calls. Cause rpcbind to open up random listening
             ports. Note that rpcinfo need this feature turned on for work
             properly. (This flag is a Debian extension.)

FILES
     If "/etc/default/rpcbind" exists, rpcbind will use the specified options
     at launch time rpcbind Otherwise rpcbind will try to load configuration
     from "/etc/rppcbind.conf" rpcbind The default options are set as "-w -f".

NOTES
     All RPC servers must be restarted if rpcbind is restarted.

SEE ALSO
     rpcinfo(8)

LINUX PORT
     Aurelien Charbon <aurelien.charbon AT bull.net>

BSD                           September 14, 1992                           BSD
RPCBIND(3)               BSD Library Functions Manual               RPCBIND(3)

NAME
     rpcb_getmaps, rpcb_getaddr, rpcb_gettime, rpcb_rmtcall, rpcb_set,
     rpcb_unset -- library routines for RPC bind service

SYNOPSIS
     #include <rpc/rpc.h>

     rpcblist *
     rpcb_getmaps(const struct netconfig *netconf, const char *host);

     bool_t
     rpcb_getaddr(const rpcprog_t prognum, const rpcvers_t versnum,
         const struct netconfig *netconf, struct netbuf *svcaddr,
         const char *host);

     bool_t
     rpcb_gettime(const char *host, time_t * timep);

     enum clnt_stat
     rpcb_rmtcall(const struct netconfig *netconf, const char *host,
         const rpcprog_t prognum, const rpcvers_t versnum,
         const rpcproc_t procnum, const xdrproc_t inproc, const caddr_t in,
         const xdrproc_t outproc, const caddr_t out,
         const struct timeval tout, const struct netbuf *svcaddr);

     bool_t
     rpcb_set(const rpcprog_t prognum, const rpcvers_t versnum,
         const struct netconfig *netconf, const struct netbuf *svcaddr);

     bool_t
     rpcb_unset(const rpcprog_t prognum, const rpcvers_t versnum,
         const struct netconfig *netconf);

DESCRIPTION
     These routines allow client C programs to make procedure calls to the RPC
     binder service.  (see rpcbind(8)) maintains a list of mappings between
     programs and their universal addresses.

Routines
     rpcb_getmaps()
            An interface to the rpcbind service, which returns a list of the
            current RPC program-to-address mappings on host.  It uses the
            transport specified through netconf to contact the remote rpcbind
            service on host.  This routine will return NULL, if the remote
            rpcbind could not be contacted.

     rpcb_getaddr()
            An interface to the rpcbind service, which finds the address of
            the service on host that is registered with program number
            prognum, version versnum, and speaks the transport protocol asso-
            ciated with netconf.  The address found is returned in svcaddr.
            The svcaddr argument should be preallocated.  This routine returns
            TRUE if it succeeds.  A return value of FALSE means that the map-
            ping does not exist or that the RPC system failed to contact the
            remote rpcbind service.  In the latter case, the global variable
            rpc_createerr (see rpc_clnt_create(3)) contains the RPC status.

     rpcb_gettime()
            This routine returns the time on host in timep.  If host is NULL,
            rpcb_gettime() returns the time on its own machine.  This routine
            returns TRUE if it succeeds, FALSE if it fails.  The
            rpcb_gettime() function can be used to synchronize the time be-
            tween the client and the remote server.

     rpcb_rmtcall()
            An interface to the rpcbind service, which instructs rpcbind on
            host to make an RPC call on your behalf to a procedure on that
            host.  The netconfig() structure should correspond to a connec-
            tionless transport.  The svcaddr argument will be modified to the
            server's address if the procedure succeeds (see rpc_call() and
            clnt_call() in rpc_clnt_calls(3) for the definitions of other ar-
            guments).

            This procedure should normally be used for a "ping" and nothing
            else.  This routine allows programs to do lookup and call, all in
            one step.

            Note: Even if the server is not running rpcb_rmtcall() does not
            return any error messages to the caller.  In such a case, the
            caller times out.

            Note: rpcb_rmtcall() is only available for connectionless trans-
            ports.

     rpcb_set()
            An interface to the rpcbind service, which establishes a mapping
            between the triple [prognum, versnum, netconf->nc_netid] and
            svcaddr on the machine's rpcbind service.  The value of nc_netid
            must correspond to a network identifier that is defined by the
            netconfig database.  This routine returns TRUE if it succeeds,
            FALSE otherwise.  (See also svc_reg() in rpc_svc_calls(3).)  If
            there already exists such an entry with rpcbind, rpcb_set() will
            fail.

     rpcb_unset()
            An interface to the rpcbind service, which destroys the mapping
            between the triple [prognum, versnum, netconf->nc_netid] and the
            address on the machine's rpcbind service.  If netconf is NULL,
            rpcb_unset() destroys all mapping between the triple [prognum,
            versnum, all-transports] and the addresses on the machine's
            rpcbind service.  This routine returns TRUE if it succeeds, FALSE
            otherwise.  Only the owner of the service or the super-user can
            destroy the mapping.  (See also svc_unreg() in rpc_svc_calls(3).)

AVAILABILITY
     These functions are part of libtirpc.

SEE ALSO
     rpc_clnt_calls(3), rpc_svc_calls(3), rpcbind(8), rpcinfo(8)

BSD                               May 7, 1993                              BSD