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 */ 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 1.1 1993/10/27 05:40:40 paul Exp $"; 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 } 397 398