392 lines
11 KiB
C
392 lines
11 KiB
C
/* $NetBSD: pmap_rmt.c,v 1.6 1995/06/03 22:37:25 mycroft Exp $ */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";*/
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/*static char *sccsid = "from: @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC";*/
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static char *rcsid = "$NetBSD: pmap_rmt.c,v 1.6 1995/06/03 22:37:25 mycroft Exp $";
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#endif
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/*
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* pmap_rmt.c
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* Client interface to pmap rpc service.
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* remote call and broadcast service
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*
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* Copyright (C) 1984, Sun Microsystems, Inc.
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*/
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#include <rpc/rpc.h>
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#include <rpc/pmap_prot.h>
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#include <rpc/pmap_clnt.h>
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#include <rpc/pmap_rmt.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <arpa/inet.h>
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#define MAX_BROADCAST_SIZE 1400
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static struct timeval timeout = { 3, 0 };
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/*
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* pmapper remote-call-service interface.
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* This routine is used to call the pmapper remote call service
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* which will look up a service program in the port maps, and then
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* remotely call that routine with the given parameters. This allows
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* programs to do a lookup and call in one step.
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*/
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enum clnt_stat
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pmap_rmtcall(addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
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struct sockaddr_in *addr;
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u_long prog, vers, proc;
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xdrproc_t xdrargs, xdrres;
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caddr_t argsp, resp;
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struct timeval tout;
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u_long *port_ptr;
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{
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int socket = -1;
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register CLIENT *client;
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struct rmtcallargs a;
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struct rmtcallres r;
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enum clnt_stat stat;
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addr->sin_port = htons(PMAPPORT);
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client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &socket);
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if (client != (CLIENT *)NULL) {
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a.prog = prog;
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a.vers = vers;
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a.proc = proc;
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a.args_ptr = argsp;
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a.xdr_args = xdrargs;
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r.port_ptr = port_ptr;
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r.results_ptr = resp;
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r.xdr_results = xdrres;
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stat = CLNT_CALL(client, PMAPPROC_CALLIT, xdr_rmtcall_args, &a,
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xdr_rmtcallres, &r, tout);
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CLNT_DESTROY(client);
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} else {
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stat = RPC_FAILED;
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}
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(void)close(socket);
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addr->sin_port = 0;
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return (stat);
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}
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/*
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* XDR remote call arguments
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* written for XDR_ENCODE direction only
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*/
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bool_t
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xdr_rmtcall_args(xdrs, cap)
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register XDR *xdrs;
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register struct rmtcallargs *cap;
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{
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u_int lenposition, argposition, position;
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if (xdr_u_long(xdrs, &(cap->prog)) &&
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xdr_u_long(xdrs, &(cap->vers)) &&
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xdr_u_long(xdrs, &(cap->proc))) {
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lenposition = XDR_GETPOS(xdrs);
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if (! xdr_u_long(xdrs, &(cap->arglen)))
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return (FALSE);
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argposition = XDR_GETPOS(xdrs);
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if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
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return (FALSE);
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position = XDR_GETPOS(xdrs);
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cap->arglen = (u_long)position - (u_long)argposition;
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XDR_SETPOS(xdrs, lenposition);
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if (! xdr_u_long(xdrs, &(cap->arglen)))
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return (FALSE);
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XDR_SETPOS(xdrs, position);
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return (TRUE);
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}
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return (FALSE);
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}
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/*
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* XDR remote call results
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* written for XDR_DECODE direction only
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*/
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bool_t
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xdr_rmtcallres(xdrs, crp)
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register XDR *xdrs;
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register struct rmtcallres *crp;
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{
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caddr_t port_ptr;
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port_ptr = (caddr_t)crp->port_ptr;
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if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
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xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
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crp->port_ptr = (u_long *)port_ptr;
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return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
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}
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return (FALSE);
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}
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/*
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* The following is kludged-up support for simple rpc broadcasts.
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* Someday a large, complicated system will replace these trivial
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* routines which only support udp/ip .
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*/
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static int
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getbroadcastnets(addrs, sock, buf)
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struct in_addr *addrs;
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int sock; /* any valid socket will do */
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char *buf; /* why allocxate more when we can use existing... */
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{
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struct ifconf ifc;
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struct ifreq ifreq, *ifr;
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struct sockaddr_in *sin;
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char *cp, *cplim;
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int n, i = 0;
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ifc.ifc_len = UDPMSGSIZE;
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ifc.ifc_buf = buf;
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if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
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perror("broadcast: ioctl (get interface configuration)");
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return (0);
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}
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#define max(a, b) (a > b ? a : b)
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#define size(p) max((p).sa_len, sizeof(p))
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cplim = buf + ifc.ifc_len; /*skip over if's with big ifr_addr's */
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for (cp = buf; cp < cplim;
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cp += sizeof (ifr->ifr_name) + size(ifr->ifr_addr)) {
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ifr = (struct ifreq *)cp;
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if (ifr->ifr_addr.sa_family != AF_INET)
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continue;
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ifreq = *ifr;
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if (ioctl(sock, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
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perror("broadcast: ioctl (get interface flags)");
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continue;
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}
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if ((ifreq.ifr_flags & IFF_BROADCAST) &&
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(ifreq.ifr_flags & IFF_UP)) {
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sin = (struct sockaddr_in *)&ifr->ifr_addr;
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#ifdef SIOCGIFBRDADDR /* 4.3BSD */
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if (ioctl(sock, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
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addrs[i++] =
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inet_makeaddr(inet_netof(sin->sin_addr),
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INADDR_ANY);
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} else {
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addrs[i++] = ((struct sockaddr_in*)
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&ifreq.ifr_addr)->sin_addr;
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}
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#else /* 4.2 BSD */
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addrs[i++] = inet_makeaddr(inet_netof(sin->sin_addr),
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INADDR_ANY);
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#endif
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}
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}
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return (i);
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}
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typedef bool_t (*resultproc_t)();
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enum clnt_stat
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clnt_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
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u_long prog; /* program number */
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u_long vers; /* version number */
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u_long proc; /* procedure number */
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xdrproc_t xargs; /* xdr routine for args */
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caddr_t argsp; /* pointer to args */
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xdrproc_t xresults; /* xdr routine for results */
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caddr_t resultsp; /* pointer to results */
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resultproc_t eachresult; /* call with each result obtained */
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{
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enum clnt_stat stat;
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AUTH *unix_auth = authunix_create_default();
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XDR xdr_stream;
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register XDR *xdrs = &xdr_stream;
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int outlen, inlen, fromlen, nets;
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register int sock;
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int on = 1;
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fd_set mask;
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fd_set readfds;
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register int i;
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bool_t done = FALSE;
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register u_long xid;
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u_long port;
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struct in_addr addrs[20];
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struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
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struct rmtcallargs a;
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struct rmtcallres r;
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struct rpc_msg msg;
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struct timeval t;
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char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
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/*
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* initialization: create a socket, a broadcast address, and
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* preserialize the arguments into a send buffer.
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*/
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if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
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perror("Cannot create socket for broadcast rpc");
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stat = RPC_CANTSEND;
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goto done_broad;
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}
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#ifdef SO_BROADCAST
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if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
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perror("Cannot set socket option SO_BROADCAST");
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stat = RPC_CANTSEND;
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goto done_broad;
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}
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#endif /* def SO_BROADCAST */
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FD_ZERO(&mask);
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FD_SET(sock, &mask);
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nets = getbroadcastnets(addrs, sock, inbuf);
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memset(&baddr, 0, sizeof (baddr));
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baddr.sin_len = sizeof(struct sockaddr_in);
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baddr.sin_family = AF_INET;
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baddr.sin_port = htons(PMAPPORT);
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baddr.sin_addr.s_addr = htonl(INADDR_ANY);
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/* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
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(void)gettimeofday(&t, (struct timezone *)0);
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msg.rm_xid = xid = getpid() ^ t.tv_sec ^ t.tv_usec;
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t.tv_usec = 0;
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msg.rm_direction = CALL;
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msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
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msg.rm_call.cb_prog = PMAPPROG;
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msg.rm_call.cb_vers = PMAPVERS;
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msg.rm_call.cb_proc = PMAPPROC_CALLIT;
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msg.rm_call.cb_cred = unix_auth->ah_cred;
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msg.rm_call.cb_verf = unix_auth->ah_verf;
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a.prog = prog;
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a.vers = vers;
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a.proc = proc;
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a.xdr_args = xargs;
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a.args_ptr = argsp;
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r.port_ptr = &port;
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r.xdr_results = xresults;
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r.results_ptr = resultsp;
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xdrmem_create(xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
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if ((! xdr_callmsg(xdrs, &msg)) || (! xdr_rmtcall_args(xdrs, &a))) {
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stat = RPC_CANTENCODEARGS;
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goto done_broad;
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}
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outlen = (int)xdr_getpos(xdrs);
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xdr_destroy(xdrs);
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/*
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* Basic loop: broadcast a packet and wait a while for response(s).
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* The response timeout grows larger per iteration.
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*/
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for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2) {
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for (i = 0; i < nets; i++) {
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baddr.sin_addr = addrs[i];
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if (sendto(sock, outbuf, outlen, 0,
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(struct sockaddr *)&baddr,
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sizeof (struct sockaddr)) != outlen) {
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perror("Cannot send broadcast packet");
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stat = RPC_CANTSEND;
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goto done_broad;
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}
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}
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if (eachresult == NULL) {
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stat = RPC_SUCCESS;
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goto done_broad;
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}
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recv_again:
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msg.acpted_rply.ar_verf = _null_auth;
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msg.acpted_rply.ar_results.where = (caddr_t)&r;
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msg.acpted_rply.ar_results.proc = xdr_rmtcallres;
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readfds = mask;
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switch (select(sock+1, &readfds, (int *)NULL,
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(int *)NULL, &t)) {
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case 0: /* timed out */
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stat = RPC_TIMEDOUT;
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continue;
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case -1: /* some kind of error */
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if (errno == EINTR)
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goto recv_again;
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perror("Broadcast select problem");
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stat = RPC_CANTRECV;
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goto done_broad;
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} /* end of select results switch */
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try_again:
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fromlen = sizeof(struct sockaddr);
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inlen = recvfrom(sock, inbuf, UDPMSGSIZE, 0,
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(struct sockaddr *)&raddr, &fromlen);
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if (inlen < 0) {
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if (errno == EINTR)
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goto try_again;
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perror("Cannot receive reply to broadcast");
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stat = RPC_CANTRECV;
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goto done_broad;
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}
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if (inlen < sizeof(u_int32_t))
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goto recv_again;
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/*
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* see if reply transaction id matches sent id.
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* If so, decode the results.
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*/
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xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE);
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if (xdr_replymsg(xdrs, &msg)) {
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if ((msg.rm_xid == xid) &&
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(msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
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(msg.acpted_rply.ar_stat == SUCCESS)) {
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raddr.sin_port = htons((u_short)port);
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done = (*eachresult)(resultsp, &raddr);
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}
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/* otherwise, we just ignore the errors ... */
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} else {
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#ifdef notdef
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/* some kind of deserialization problem ... */
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if (msg.rm_xid == xid)
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fprintf(stderr, "Broadcast deserialization problem");
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/* otherwise, just random garbage */
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#endif
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}
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xdrs->x_op = XDR_FREE;
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msg.acpted_rply.ar_results.proc = xdr_void;
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(void)xdr_replymsg(xdrs, &msg);
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(void)(*xresults)(xdrs, resultsp);
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xdr_destroy(xdrs);
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if (done) {
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stat = RPC_SUCCESS;
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goto done_broad;
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} else {
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goto recv_again;
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}
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}
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done_broad:
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(void)close(sock);
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AUTH_DESTROY(unix_auth);
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return (stat);
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}
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