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- /*======================================================================
- C L N T _ D I R B C A S T . C
- doc: Tue Jun 2 13:49:18 1992
- dlm: Tue Jun 2 15:03:49 1992
- (c) 1992 ant@ips.id.ethz.ch
- uE-Info: 157 0 T 0 0 72 2 2 8 ofnI
- ======================================================================*/
-
- /*
- This file implements a directed broadcast. It's basically a copy of
- the original RPC 4.0 clnt_broadcast routine. A lot of stuff could have
- been thrown out, but I preferred minimum change.
- */
- /*
- * 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
- */
-
- #include <stdio.h>
- #include <errno.h>
- #include <rpc/rpc.h>
- #include <rpc/pmap_rmt.h>
- #include <rpc/pmap_prot.h>
- #include <sys/socket.h>
- #include </usr/include/netdb.h> /* Prefer system over rpc/netdb.h */
- #include <strings.h>
- #ifndef ITIMER_REAL
- #include <sys/time.h>
- #endif
-
- typedef bool_t (*resultproc_t)();
-
- enum clnt_stat
- clnt_dirbcast(addr, prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
- char *addr; /* internet address */
- 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;
- AUTH *unix_auth = authunix_create_default();
- XDR xdr_stream;
- register XDR *xdrs = &xdr_stream;
- int outlen, inlen, fromlen, nets;
- register int sock;
- int on = 1;
- #ifdef FD_SETSIZE
- fd_set mask;
- fd_set readfds;
- #else
- int readfds;
- register int mask;
- #endif /* def FD_SETSIZE */
- register int i;
- bool_t done = FALSE;
- register 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;
- struct timeval t;
- #define MAX_BROADCAST_SIZE 1400
- 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 */
- #ifdef FD_SETSIZE
- FD_ZERO(&mask);
- FD_SET(sock, &mask);
- #else
- mask = (1 << sock);
- #endif /* def FD_SETSIZE */
- addrs[0].s_addr = inet_addr(addr);
- nets = 1;
- 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); */
- (void)gettimeofday(&t, (struct timezone *)0);
- msg.rm_xid = xid = getpid() ^ t.tv_sec ^ t.tv_usec;
- 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 = xdr_rmtcallres;
- readfds = mask;
- switch (select(_rpc_dtablesize(), &readfds, (int *)NULL,
- (int *)NULL, &t)) {
-
- case 0: /* timed out */
- stat = RPC_TIMEDOUT;
- continue;
-
- case -1: /* some kind of error */
- if (errno == EINTR)
- goto recv_again;
- perror("Broadcast select problem");
- stat = RPC_CANTRECV;
- goto done_broad;
-
- } /* end of select 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 (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 ((msg.rm_xid == 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 (msg.rm_xid == xid)
- fprintf(stderr, "Broadcast deserialization problem");
- /* otherwise, just random garbage */
- #endif
- }
- xdrs->x_op = XDR_FREE;
- msg.acpted_rply.ar_results.proc = 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);
- }
-
-
-