[unix-history] / lib / librpc / rpc / pmap_rmt.c

/*
 * 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 defined(LIBC_SCCS) && !defined(lint)
/*static char *sccsid = "from: @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";*/
/*static char *sccsid = "from: @(#)pmap_rmt.c	2.2 88/08/01 4.0 RPCSRC";*/
static char *rcsid = "$Id: pmap_rmt.c,v 1.3 1993/08/26 00:53:32 jtc Exp $";
#endif

/*
 * pmap_rmt.c
 * Client interface to pmap rpc service.
 * remote call and broadcast service
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#include <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpc/pmap_clnt.h>
#include <rpc/pmap_rmt.h>
#include <sys/socket.h>
#include <stdio.h>
#include <errno.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#define MAX_BROADCAST_SIZE 1400

extern int errno;
static 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;
	register 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, xdr_rmtcall_args, &a,
		    xdr_rmtcallres, &r, tout);
		CLNT_DESTROY(client);
	} else {
		stat = RPC_FAILED;
	}
	(void)close(socket);
	addr->sin_port = 0;
	return (stat);
}


/*
 * XDR remote call arguments
 * written for XDR_ENCODE direction only
 */
bool_t
xdr_rmtcall_args(xdrs, cap)
	register XDR *xdrs;
	register 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)
	register XDR *xdrs;
	register struct rmtcallres *crp;
{
	caddr_t port_ptr;

	port_ptr = (caddr_t)crp->port_ptr;
	if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
	    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
getbroadcastnets(addrs, sock, buf)
	struct in_addr *addrs;
	int sock;  /* any valid socket will do */
	char *buf;  /* why allocxate more when we can use existing... */
{
	struct ifconf ifc;
        struct ifreq ifreq, *ifr;
	struct sockaddr_in *sin;
        char *cp, *cplim;
        int n, i = 0;

        ifc.ifc_len = UDPMSGSIZE;
        ifc.ifc_buf = buf;
        if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
                perror("broadcast: ioctl (get interface configuration)");
                return (0);
        }
#define max(a, b) (a > b ? a : b)
#define size(p)	max((p).sa_len, sizeof(p))
	cplim = buf + ifc.ifc_len; /*skip over if's with big ifr_addr's */
	for (cp = buf; cp < cplim;
			cp += sizeof (ifr->ifr_name) + size(ifr->ifr_addr)) {
		ifr = (struct ifreq *)cp;
		if (ifr->ifr_addr.sa_family != AF_INET)
			continue;
		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)) {
			sin = (struct sockaddr_in *)&ifr->ifr_addr;
#ifdef SIOCGIFBRDADDR   /* 4.3BSD */
			if (ioctl(sock, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
				addrs[i++] =
				    inet_makeaddr(inet_netof(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),
			    INADDR_ANY);
#endif
		}
	}
	return (i);
}

typedef bool_t (*resultproc_t)();

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;
	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; 
	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 */
	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); */
	(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);
}
Commit	Line	Data
15637ed4 RG	1	/*
	2	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
	3	* unrestricted use provided that this legend is included on all tape
	4	* media and as a part of the software program in whole or part. Users
	5	* may copy or modify Sun RPC without charge, but are not authorized
	6	* to license or distribute it to anyone else except as part of a product or
	7	* program developed by the user.
	8	*
	9	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
	10	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
	11	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
	12	*
	13	* Sun RPC is provided with no support and without any obligation on the
	14	* part of Sun Microsystems, Inc. to assist in its use, correction,
	15	* modification or enhancement.
	16	*
	17	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
	18	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
	19	* OR ANY PART THEREOF.
	20	*
	21	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
	22	* or profits or other special, indirect and consequential damages, even if
	23	* Sun has been advised of the possibility of such damages.
	24	*
	25	* Sun Microsystems, Inc.
	26	* 2550 Garcia Avenue
	27	* Mountain View, California 94043
	28	*/
78ed81a3	29
	30	#if defined(LIBC_SCCS) && !defined(lint)
	31	/static char sccsid = "from: @(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro";*/
	32	/static char sccsid = "from: @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC";*/
	33	static char *rcsid = "$Id: pmap_rmt.c,v 1.3 1993/08/26 00:53:32 jtc Exp $";
15637ed4 RG	34	#endif
	35
	36	/*
	37	* pmap_rmt.c
	38	* Client interface to pmap rpc service.
	39	* remote call and broadcast service
	40	*
	41	* Copyright (C) 1984, Sun Microsystems, Inc.
	42	*/
	43
	44	#include <rpc/rpc.h>
	45	#include <rpc/pmap_prot.h>
	46	#include <rpc/pmap_clnt.h>
	47	#include <rpc/pmap_rmt.h>
	48	#include <sys/socket.h>
	49	#include <stdio.h>
	50	#include <errno.h>
	51	#include <net/if.h>
	52	#include <sys/ioctl.h>
	53	#include <arpa/inet.h>
	54	#define MAX_BROADCAST_SIZE 1400
	55
	56	extern int errno;
	57	static struct timeval timeout = { 3, 0 };
	58
	59
	60	/*
	61	* pmapper remote-call-service interface.
	62	* This routine is used to call the pmapper remote call service
	63	* which will look up a service program in the port maps, and then
	64	* remotely call that routine with the given parameters. This allows
	65	* programs to do a lookup and call in one step.
	66	*/
	67	enum clnt_stat
	68	pmap_rmtcall(addr, prog, vers, proc, xdrargs, argsp, xdrres, resp, tout, port_ptr)
	69	struct sockaddr_in *addr;
	70	u_long prog, vers, proc;
	71	xdrproc_t xdrargs, xdrres;
	72	caddr_t argsp, resp;
	73	struct timeval tout;
	74	u_long *port_ptr;
	75	{
	76	int socket = -1;
	77	register CLIENT *client;
	78	struct rmtcallargs a;
	79	struct rmtcallres r;
	80	enum clnt_stat stat;
	81
	82	addr->sin_port = htons(PMAPPORT);
	83	client = clntudp_create(addr, PMAPPROG, PMAPVERS, timeout, &socket);
	84	if (client != (CLIENT *)NULL) {
	85	a.prog = prog;
	86	a.vers = vers;
	87	a.proc = proc;
	88	a.args_ptr = argsp;
	89	a.xdr_args = xdrargs;
	90	r.port_ptr = port_ptr;
	91	r.results_ptr = resp;
	92	r.xdr_results = xdrres;
	93	stat = CLNT_CALL(client, PMAPPROC_CALLIT, xdr_rmtcall_args, &a,
	94	xdr_rmtcallres, &r, tout);
	95	CLNT_DESTROY(client);
	96	} else {
	97	stat = RPC_FAILED;
98	}
99	(void)close(socket);
100	addr->sin_port = 0;
101	return (stat);
102	}
103
104
105	/*
106	* XDR remote call arguments
107	* written for XDR_ENCODE direction only
108	*/
109	bool_t
110	xdr_rmtcall_args(xdrs, cap)
111	register XDR *xdrs;
112	register struct rmtcallargs *cap;
113	{
114	u_int lenposition, argposition, position;
115
116	if (xdr_u_long(xdrs, &(cap->prog)) &&
117	xdr_u_long(xdrs, &(cap->vers)) &&
118	xdr_u_long(xdrs, &(cap->proc))) {
119	lenposition = XDR_GETPOS(xdrs);
120	if (! xdr_u_long(xdrs, &(cap->arglen)))
121	return (FALSE);
122	argposition = XDR_GETPOS(xdrs);
123	if (! (*(cap->xdr_args))(xdrs, cap->args_ptr))
124	return (FALSE);
125	position = XDR_GETPOS(xdrs);
126	cap->arglen = (u_long)position - (u_long)argposition;
127	XDR_SETPOS(xdrs, lenposition);
128	if (! xdr_u_long(xdrs, &(cap->arglen)))
129	return (FALSE);
130	XDR_SETPOS(xdrs, position);
131	return (TRUE);
132	}
133	return (FALSE);
134	}
135
136	/*
137	* XDR remote call results
138	* written for XDR_DECODE direction only
139	*/
140	bool_t
141	xdr_rmtcallres(xdrs, crp)
142	register XDR *xdrs;
143	register struct rmtcallres *crp;
144	{
145	caddr_t port_ptr;
146
147	port_ptr = (caddr_t)crp->port_ptr;
148	if (xdr_reference(xdrs, &port_ptr, sizeof (u_long),
149	xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
150	crp->port_ptr = (u_long *)port_ptr;
151	return ((*(crp->xdr_results))(xdrs, crp->results_ptr));
152	}
153	return (FALSE);
154	}
155
156
157	/*
158	* The following is kludged-up support for simple rpc broadcasts.
159	* Someday a large, complicated system will replace these trivial
160	* routines which only support udp/ip .
161	*/
162
163	static int
164	getbroadcastnets(addrs, sock, buf)
165	struct in_addr *addrs;
166	int sock; /* any valid socket will do */
167	char buf; / why allocxate more when we can use existing... */
168	{
169	struct ifconf ifc;
170	struct ifreq ifreq, *ifr;
171	struct sockaddr_in *sin;
172	char cp, cplim;
173	int n, i = 0;
174
175	ifc.ifc_len = UDPMSGSIZE;
176	ifc.ifc_buf = buf;
177	if (ioctl(sock, SIOCGIFCONF, (char *)&ifc) < 0) {
178	perror("broadcast: ioctl (get interface configuration)");
179	return (0);
180	}
181	#define max(a, b) (a > b ? a : b)
182	#define size(p) max((p).sa_len, sizeof(p))
183	cplim = buf + ifc.ifc_len; /skip over if's with big ifr_addr's /
184	for (cp = buf; cp < cplim;
185	cp += sizeof (ifr->ifr_name) + size(ifr->ifr_addr)) {
186	ifr = (struct ifreq *)cp;
187	if (ifr->ifr_addr.sa_family != AF_INET)
188	continue;
189	ifreq = *ifr;
190	if (ioctl(sock, SIOCGIFFLAGS, (char *)&ifreq) < 0) {
191	perror("broadcast: ioctl (get interface flags)");
192	continue;
193	}
194	if ((ifreq.ifr_flags & IFF_BROADCAST) &&
195	(ifreq.ifr_flags & IFF_UP)) {
196	sin = (struct sockaddr_in *)&ifr->ifr_addr;
197	#ifdef SIOCGIFBRDADDR /* 4.3BSD */
198	if (ioctl(sock, SIOCGIFBRDADDR, (char *)&ifreq) < 0) {
199	addrs[i++] =
200	inet_makeaddr(inet_netof(sin->sin_addr),
201	INADDR_ANY);
202	} else {
203	addrs[i++] = ((struct sockaddr_in*)
204	&ifreq.ifr_addr)->sin_addr;
205	}
206	#else /* 4.2 BSD */
207	addrs[i++] = inet_makeaddr(inet_netof(sin->sin_addr),
208	INADDR_ANY);
209	#endif
210	}
211	}
212	return (i);
213	}
214
215	typedef bool_t (*resultproc_t)();
216
217	enum clnt_stat
218	clnt_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult)
219	u_long prog; /* program number */
220	u_long vers; /* version number */
221	u_long proc; /* procedure number */
222	xdrproc_t xargs; /* xdr routine for args */
223	caddr_t argsp; /* pointer to args */
224	xdrproc_t xresults; /* xdr routine for results */
225	caddr_t resultsp; /* pointer to results */
226	resultproc_t eachresult; /* call with each result obtained */
227	{
228	enum clnt_stat stat;
229	AUTH *unix_auth = authunix_create_default();
230	XDR xdr_stream;
231	register XDR *xdrs = &xdr_stream;
232	int outlen, inlen, fromlen, nets;
233	register int sock;
234	int on = 1;
235	#ifdef FD_SETSIZE
236	fd_set mask;
237	fd_set readfds;
238	#else
239	int readfds;
240	register int mask;
241	#endif /* def FD_SETSIZE */
242	register int i;
243	bool_t done = FALSE;
244	register u_long xid;
245	u_long port;
246	struct in_addr addrs[20];
247	struct sockaddr_in baddr, raddr; /* broadcast and response addresses */
248	struct rmtcallargs a;
249	struct rmtcallres r;
250	struct rpc_msg msg;
251	struct timeval t;
252	char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE];
253
254	/*
255	* initialization: create a socket, a broadcast address, and
256	* preserialize the arguments into a send buffer.
257	*/
258	if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
259	perror("Cannot create socket for broadcast rpc");
260	stat = RPC_CANTSEND;
261	goto done_broad;
262	}
263	#ifdef SO_BROADCAST
264	if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
265	perror("Cannot set socket option SO_BROADCAST");
266	stat = RPC_CANTSEND;
267	goto done_broad;
268	}
269	#endif /* def SO_BROADCAST */
270	#ifdef FD_SETSIZE
271	FD_ZERO(&mask);
272	FD_SET(sock, &mask);
273	#else
274	mask = (1 << sock);
275	#endif /* def FD_SETSIZE */
276	nets = getbroadcastnets(addrs, sock, inbuf);
277	bzero((char *)&baddr, sizeof (baddr));
278	baddr.sin_family = AF_INET;
279	baddr.sin_port = htons(PMAPPORT);
280	baddr.sin_addr.s_addr = htonl(INADDR_ANY);
281	/* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */
282	(void)gettimeofday(&t, (struct timezone *)0);
283	msg.rm_xid = xid = getpid() ^ t.tv_sec ^ t.tv_usec;
284	t.tv_usec = 0;
285	msg.rm_direction = CALL;
286	msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
287	msg.rm_call.cb_prog = PMAPPROG;
288	msg.rm_call.cb_vers = PMAPVERS;
289	msg.rm_call.cb_proc = PMAPPROC_CALLIT;
290	msg.rm_call.cb_cred = unix_auth->ah_cred;
291	msg.rm_call.cb_verf = unix_auth->ah_verf;
292	a.prog = prog;
293	a.vers = vers;
294	a.proc = proc;
295	a.xdr_args = xargs;
296	a.args_ptr = argsp;
297	r.port_ptr = &port;
298	r.xdr_results = xresults;
299	r.results_ptr = resultsp;
300	xdrmem_create(xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE);
301	if ((! xdr_callmsg(xdrs, &msg)) \|\| (! xdr_rmtcall_args(xdrs, &a))) {
302	stat = RPC_CANTENCODEARGS;
303	goto done_broad;
304	}
305	outlen = (int)xdr_getpos(xdrs);
306	xdr_destroy(xdrs);
307	/*
308	* Basic loop: broadcast a packet and wait a while for response(s).
309	* The response timeout grows larger per iteration.
310	*/
311	for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2) {
312	for (i = 0; i < nets; i++) {
313	baddr.sin_addr = addrs[i];
314	if (sendto(sock, outbuf, outlen, 0,
315	(struct sockaddr *)&baddr,
316	sizeof (struct sockaddr)) != outlen) {
317	perror("Cannot send broadcast packet");
318	stat = RPC_CANTSEND;
319	goto done_broad;
320	}
321	}
322	if (eachresult == NULL) {
323	stat = RPC_SUCCESS;
324	goto done_broad;
325	}
326	recv_again:
327	msg.acpted_rply.ar_verf = _null_auth;
328	msg.acpted_rply.ar_results.where = (caddr_t)&r;
329	msg.acpted_rply.ar_results.proc = xdr_rmtcallres;
330	readfds = mask;
331	switch (select(_rpc_dtablesize(), &readfds, (int *)NULL,
332	(int *)NULL, &t)) {
333
334	case 0: /* timed out */
335	stat = RPC_TIMEDOUT;
336	continue;
337
338	case -1: /* some kind of error */
339	if (errno == EINTR)
340	goto recv_again;
341	perror("Broadcast select problem");
342	stat = RPC_CANTRECV;
343	goto done_broad;
344
345	} /* end of select results switch */
346	try_again:
347	fromlen = sizeof(struct sockaddr);
348	inlen = recvfrom(sock, inbuf, UDPMSGSIZE, 0,
349	(struct sockaddr *)&raddr, &fromlen);
350	if (inlen < 0) {
351	if (errno == EINTR)
352	goto try_again;
353	perror("Cannot receive reply to broadcast");
354	stat = RPC_CANTRECV;
355	goto done_broad;
356	}
357	if (inlen < sizeof(u_long))
358	goto recv_again;
359	/*
360	* see if reply transaction id matches sent id.
361	* If so, decode the results.
362	*/
363	xdrmem_create(xdrs, inbuf, (u_int)inlen, XDR_DECODE);
364	if (xdr_replymsg(xdrs, &msg)) {
365	if ((msg.rm_xid == xid) &&
366	(msg.rm_reply.rp_stat == MSG_ACCEPTED) &&
367	(msg.acpted_rply.ar_stat == SUCCESS)) {
368	raddr.sin_port = htons((u_short)port);
369	done = (*eachresult)(resultsp, &raddr);
370	}
371	/* otherwise, we just ignore the errors ... */
372	} else {
373	#ifdef notdef
374	/* some kind of deserialization problem ... */
375	if (msg.rm_xid == xid)
376	fprintf(stderr, "Broadcast deserialization problem");
377	/* otherwise, just random garbage */
378	#endif
379	}
380	xdrs->x_op = XDR_FREE;
381	msg.acpted_rply.ar_results.proc = xdr_void;
382	(void)xdr_replymsg(xdrs, &msg);
383	(void)(*xresults)(xdrs, resultsp);
384	xdr_destroy(xdrs);
385	if (done) {
386	stat = RPC_SUCCESS;
387	goto done_broad;
388	} else {
389	goto recv_again;
390	}
391	}
392	done_broad:
393	(void)close(sock);
394	AUTH_DESTROY(unix_auth);
395	return (stat);
396	}
397