/* @(#)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) attribute_hidden; 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 (struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc, xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t 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))) { u_long dummy_arglen = 0; lenposition = XDR_GETPOS (xdrs); if (!xdr_u_long (xdrs, &dummy_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; } libc_hidden_def(xdr_rmtcall_args) /* * XDR remote call results * written for XDR_DECODE direction only */ bool_t xdr_rmtcallres (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; } libc_hidden_def(xdr_rmtcallres) /* * 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 ( 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); memset ((char *) &baddr, 0, 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; }