/* @(#)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 !defined(lint) && defined(SCCSIDS)
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.
*/
#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>
#include <netinet/in.h>
#define MAX_BROADCAST_SIZE 1400
#include <unistd.h>
#include <string.h>
#include "dietfeatures.h"
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 (struct sockaddr_in *addr,
const unsigned long prog,
const unsigned long vers,
const unsigned long proc,
xdrproc_t xdrargs,
char* argsp, xdrproc_t xdrres,
char* resp, struct timeval tout,
unsigned long *port_ptr) {
int socket = -1;
register CLIENT *client;
struct rmtcallargs a;
struct rmtcallres r;
enum clnt_stat stat;
addr->sin_port = htons((short)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, (char*)&a,
(xdrproc_t)xdr_rmtcallres, (char*)&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(XDR* xdrs, struct rmtcallargs* cap)
{
unsigned 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 = (unsigned long) position - (unsigned 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(XDR* xdrs, struct rmtcallres* crp)
{
char* port_ptr;
port_ptr = (char*) crp->port_ptr;
if (xdr_reference(xdrs, &port_ptr, sizeof(unsigned long),
(xdrproc_t)xdr_u_long) && xdr_u_long(xdrs, &crp->resultslen)) {
crp->port_ptr = (unsigned 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... */
{
(void)addrs;
(void)sock;
(void)buf;
#ifdef __linux__
struct sockaddr_in addr;
get_myaddress(&addr);
#if 1
printf("%s(%d): no inet_makeaddr()\n", __FILE__, __LINE__);
#else
addrs[0] = inet_makeaddr(inet_netof(addr.sin_addr), INADDR_ANY);
#endif
return 1;
#else
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) {
#if 1
printf("%s(%d): no inet_makeaddr()\n", __FILE__, __LINE__);
#else
addrs[i++] = inet_makeaddr(inet_netof
(sin->sin_addr.s_addr),
INADDR_ANY);
#endif
} else {
addrs[i++] = ((struct sockaddr_in *)
&ifreq.ifr_addr)->sin_addr;
}
#else /* 4.2 BSD */
#if 1
printf("%s(%d): no inet_makeaddr()\n", __FILE__, __LINE__);
#else
addrs[i++] = inet_makeaddr(inet_netof
(sin->sin_addr.s_addr), INADDR_ANY);
#endif
#endif
}
}
return (i);
#endif
}
enum clnt_stat
clnt_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp,
eachresult)
unsigned long prog; /* program number */
unsigned long vers; /* version number */
unsigned long proc; /* procedure number */
xdrproc_t xargs; /* xdr routine for args */
char* argsp; /* pointer to args */
xdrproc_t xresults; /* xdr routine for results */
char* 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, nets;
socklen_t fromlen;
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 unsigned long xid;
unsigned 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];
memset(addrs,0,sizeof(addrs));
/*
* 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);
memset((char*)&baddr,0,sizeof(baddr));
baddr.sin_family = AF_INET;
baddr.sin_port = htons((short)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) {
struct timeval tmp;
for (i = 0; i < nets; i++) {
baddr.sin_addr = addrs[i];
if (sendto(sock, outbuf, (size_t)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 = (char*) & r;
msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_rmtcallres;
readfds = mask;
tmp=t;
switch (select(_rpc_dtablesize(), &readfds, 0, 0, &tmp)) {
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 ((size_t)inlen < sizeof(unsigned long))
goto recv_again;
/*
* see if reply transaction id matches sent id.
* If so, decode the results.
*/
xdrmem_create(xdrs, inbuf, (unsigned 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((unsigned 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 = (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);
}
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