Subversion Repositories or1k

/* @(#)pmap_rmt.c       2.2 88/08/01 4.0 RPCSRC */

/*

 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for

 * unrestricted use provided that this legend is included on all tape

 * media and as a part of the software program in whole or part.  Users

 * may copy or modify Sun RPC without charge, but are not authorized

 * to license or distribute it to anyone else except as part of a product or

 * program developed by the user.

 *

 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE

 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.

 *

 * Sun RPC is provided with no support and without any obligation on the

 * part of Sun Microsystems, Inc. to assist in its use, correction,

 * modification or enhancement.

 *

 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE

 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC

 * OR ANY PART THEREOF.

 *

 * In no event will Sun Microsystems, Inc. be liable for any lost revenue

 * or profits or other special, indirect and consequential damages, even if

 * Sun has been advised of the possibility of such damages.

 *

 * Sun Microsystems, Inc.

 * 2550 Garcia Avenue

 * Mountain View, California  94043

 */

#if 0

static char sccsid[] = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";

#endif

/*

 * pmap_rmt.c

 * Client interface to pmap rpc service.

 * remote call and broadcast service

 *

 * Copyright (C) 1984, Sun Microsystems, Inc.

 */

#define __FORCE_GLIBC

#include <features.h>

#include <unistd.h>

#include <string.h>

#include <rpc/rpc.h>

#include <rpc/pmap_prot.h>

#include <rpc/pmap_clnt.h>

#include <rpc/pmap_rmt.h>

#include <sys/poll.h>

#include <sys/socket.h>

#include <stdio.h>

#include <errno.h>

#undef   _POSIX_SOURCE          /* Ultrix <sys/param.h> needs --roland@gnu */

#include <sys/param.h>          /* Ultrix needs before net/if --roland@gnu */

#include <net/if.h>

#include <sys/ioctl.h>

#include <arpa/inet.h>

#define MAX_BROADCAST_SIZE 1400

extern u_long _create_xid (void);

static const struct timeval timeout = {3, 0};

/*

 * pmapper remote-call-service interface.

 * This routine is used to call the pmapper remote call service

 * which will look up a service program in the port maps, and then

 * remotely call that routine with the given parameters.  This allows

 * programs to do a lookup and call in one step.

 */

enum clnt_stat

pmap_rmtcall (addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)

     struct sockaddr_in *addr;

     u_long prog, vers, proc;

     xdrproc_t xdrargs, xdrres;

     caddr_t argsp, resp;

     struct timeval tout;

     u_long *port_ptr;

{

  int socket = -1;

  CLIENT *client;

  struct rmtcallargs a;

  struct rmtcallres r;

  enum clnt_stat stat;

  addr->sin_port = htons (PMAPPORT);

  client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &socket);

  if (client != (CLIENT *) NULL)

    {

      a.prog = prog;

      a.vers = vers;

      a.proc = proc;

      a.args_ptr = argsp;

      a.xdr_args = xdrargs;

      r.port_ptr = port_ptr;

      r.results_ptr = resp;

      r.xdr_results = xdrres;

      stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args,

                        (caddr_t)&a, (xdrproc_t)xdr_rmtcallres,

                        (caddr_t)&r, tout);

      CLNT_DESTROY (client);

    }

  else

    {

      stat = RPC_FAILED;

    }

  /* (void)__close(socket); CLNT_DESTROY already closed it */

  addr->sin_port = 0;

  return stat;

}

/*

 * XDR remote call arguments

 * written for XDR_ENCODE direction only

 */

bool_t

xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap)

{

  u_int lenposition, argposition, position;

  if (xdr_u_long (xdrs, &(cap->prog)) &&

      xdr_u_long (xdrs, &(cap->vers)) &&

      xdr_u_long (xdrs, &(cap->proc)))

    {

      lenposition = XDR_GETPOS (xdrs);

      if (!xdr_u_long (xdrs, &(cap->arglen)))

        return FALSE;

      argposition = XDR_GETPOS (xdrs);

      if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr))

        return FALSE;

      position = XDR_GETPOS (xdrs);

      cap->arglen = (u_long) position - (u_long) argposition;

      XDR_SETPOS (xdrs, lenposition);

      if (!xdr_u_long (xdrs, &(cap->arglen)))

        return FALSE;

      XDR_SETPOS (xdrs, position);

      return TRUE;

    }

  return FALSE;

}

/*

 * XDR remote call results

 * written for XDR_DECODE direction only

 */

bool_t

xdr_rmtcallres (xdrs, crp)

     XDR *xdrs;

     struct rmtcallres *crp;

{

  caddr_t port_ptr;

  port_ptr = (caddr_t) crp->port_ptr;

  if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long)

      && xdr_u_long (xdrs, &crp->resultslen))

    {

      crp->port_ptr = (u_long *) port_ptr;

      return (*(crp->xdr_results)) (xdrs, crp->results_ptr);

    }

  return FALSE;

}

/*

 * The following is kludged-up support for simple rpc broadcasts.

 * Someday a large, complicated system will replace these trivial

 * routines which only support udp/ip .

 */

static int

internal_function

getbroadcastnets (struct in_addr *addrs, int sock, char *buf)

  /* int sock:  any valid socket will do */

  /* char *buf: why allocate more when we can use existing... */

{

  struct ifconf ifc;

  struct ifreq ifreq, *ifr;

  struct sockaddr_in *sin;

  int n, i;

  ifc.ifc_len = UDPMSGSIZE;

  ifc.ifc_buf = buf;

  if (ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0)

    {

      perror (_("broadcast: ioctl (get interface configuration)"));

      return (0);

    }

  ifr = ifc.ifc_req;

  for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++)

    {

      ifreq = *ifr;

      if (ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0)

        {

          perror (_("broadcast: ioctl (get interface flags)"));

          continue;

        }

      if ((ifreq.ifr_flags & IFF_BROADCAST) &&

          (ifreq.ifr_flags & IFF_UP) &&

          ifr->ifr_addr.sa_family == AF_INET)

        {

          sin = (struct sockaddr_in *) &ifr->ifr_addr;

#ifdef SIOCGIFBRDADDR           /* 4.3BSD */

          if (ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0)

            {

              addrs[i++] = inet_makeaddr (inet_netof

              /* Changed to pass struct instead of s_addr member

                 by roland@gnu.  */

                                          (sin->sin_addr), INADDR_ANY);

            }

          else

            {

              addrs[i++] = ((struct sockaddr_in *)

                            &ifreq.ifr_addr)->sin_addr;

            }

#else /* 4.2 BSD */

          addrs[i++] = inet_makeaddr (inet_netof

                                      (sin->sin_addr.s_addr), INADDR_ANY);

#endif

        }

    }

  return i;

}

enum clnt_stat

clnt_broadcast (prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)

     u_long prog;               /* program number */

     u_long vers;               /* version number */

     u_long proc;               /* procedure number */

     xdrproc_t xargs;           /* xdr routine for args */

     caddr_t argsp;             /* pointer to args */

     xdrproc_t xresults;        /* xdr routine for results */

     caddr_t resultsp;          /* pointer to results */

     resultproc_t eachresult;   /* call with each result obtained */

{

  enum clnt_stat stat = RPC_FAILED;

  AUTH *unix_auth = authunix_create_default ();

  XDR xdr_stream;

  XDR *xdrs = &xdr_stream;

  struct timeval t;

  int outlen, inlen, nets;

  socklen_t fromlen;

  int sock;

  int on = 1;

  struct pollfd fd;

  int milliseconds;

  int i;

  bool_t done = FALSE;

  u_long xid;

  u_long port;

  struct in_addr addrs[20];

  struct sockaddr_in baddr, raddr;      /* broadcast and response addresses */

  struct rmtcallargs a;

  struct rmtcallres r;

  struct rpc_msg msg;

  char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];

  /*

   * initialization: create a socket, a broadcast address, and

   * preserialize the arguments into a send buffer.

   */

  if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0)

    {

      perror (_("Cannot create socket for broadcast rpc"));

      stat = RPC_CANTSEND;

      goto done_broad;

    }

#ifdef SO_BROADCAST

  if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0)

    {

      perror (_("Cannot set socket option SO_BROADCAST"));

      stat = RPC_CANTSEND;

      goto done_broad;

    }

#endif /* def SO_BROADCAST */

  fd.fd = sock;

  fd.events = POLLIN;

  nets = getbroadcastnets (addrs, sock, inbuf);

  bzero ((char *) &baddr, sizeof (baddr));

  baddr.sin_family = AF_INET;

  baddr.sin_port = htons (PMAPPORT);

  baddr.sin_addr.s_addr = htonl (INADDR_ANY);

/*      baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */

  msg.rm_xid = xid = _create_xid ();

  t.tv_usec = 0;

  msg.rm_direction = CALL;

  msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;

  msg.rm_call.cb_prog = PMAPPROG;

  msg.rm_call.cb_vers = PMAPVERS;

  msg.rm_call.cb_proc = PMAPPROC_CALLIT;

  msg.rm_call.cb_cred = unix_auth->ah_cred;

  msg.rm_call.cb_verf = unix_auth->ah_verf;

  a.prog = prog;

  a.vers = vers;

  a.proc = proc;

  a.xdr_args = xargs;

  a.args_ptr = argsp;

  r.port_ptr = &port;

  r.xdr_results = xresults;

  r.results_ptr = resultsp;

  xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);

  if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a)))

    {

      stat = RPC_CANTENCODEARGS;

      goto done_broad;

    }

  outlen = (int) xdr_getpos (xdrs);

  xdr_destroy (xdrs);

  /*

   * Basic loop: broadcast a packet and wait a while for response(s).

   * The response timeout grows larger per iteration.

   */

  for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2)

    {

      for (i = 0; i < nets; i++)

        {

          baddr.sin_addr = addrs[i];

          if (sendto (sock, outbuf, outlen, 0,

                      (struct sockaddr *) &baddr,

                      sizeof (struct sockaddr)) != outlen)

            {

              perror (_("Cannot send broadcast packet"));

              stat = RPC_CANTSEND;

              goto done_broad;

            }

        }

      if (eachresult == NULL)

        {

          stat = RPC_SUCCESS;

          goto done_broad;

        }

    recv_again:

      msg.acpted_rply.ar_verf = _null_auth;

      msg.acpted_rply.ar_results.where = (caddr_t) & r;

      msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres;

      milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000;

      switch (poll(&fd, 1, milliseconds))

        {

        case 0:          /* timed out */

          stat = RPC_TIMEDOUT;

          continue;

        case -1:                /* some kind of error */

          if (errno == EINTR)

            goto recv_again;

          perror (_("Broadcast poll problem"));

          stat = RPC_CANTRECV;

          goto done_broad;

        }                       /* end of poll results switch */

    try_again:

      fromlen = sizeof (struct sockaddr);

      inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0,

                        (struct sockaddr *) &raddr, &fromlen);

      if (inlen < 0)

        {

          if (errno == EINTR)

            goto try_again;

          perror (_("Cannot receive reply to broadcast"));

          stat = RPC_CANTRECV;

          goto done_broad;

        }

      if ((size_t) inlen < sizeof (u_long))

        goto recv_again;

      /*

       * see if reply transaction id matches sent id.

       * If so, decode the results.

       */

      xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE);

      if (xdr_replymsg (xdrs, &msg))

        {

          if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) &&

              (msg.rm_reply.rp_stat == MSG_ACCEPTED) &&

              (msg.acpted_rply.ar_stat == SUCCESS))

            {

              raddr.sin_port = htons ((u_short) port);

              done = (*eachresult) (resultsp, &raddr);

            }

          /* otherwise, we just ignore the errors ... */

        }

      else

        {

#ifdef notdef

          /* some kind of deserialization problem ... */

          if ((u_int32_t) msg.rm_xid == (u_int32_t) xid)

            fprintf (stderr, "Broadcast deserialization problem");

          /* otherwise, just random garbage */

#endif

        }

      xdrs->x_op = XDR_FREE;

      msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void;

      (void) xdr_replymsg (xdrs, &msg);

      (void) (*xresults) (xdrs, resultsp);

      xdr_destroy (xdrs);

      if (done)

        {

          stat = RPC_SUCCESS;

          goto done_broad;

        }

      else

        {

          goto recv_again;

        }

    }

done_broad:

  (void) close (sock);

  AUTH_DESTROY (unix_auth);

  return stat;

}