1 /* $NetBSD: rpc_soc.c,v 1.6 2000/07/06 03:10:35 christos Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 /* #ident "@(#)rpc_soc.c 1.17 94/04/24 SMI" */ 33 34 /* 35 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 36 * In addition, portions of such source code were derived from Berkeley 37 * 4.3 BSD under license from the Regents of the University of 38 * California. 39 */ 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 static char sccsid[] = "@(#)rpc_soc.c 1.41 89/05/02 Copyr 1988 Sun Micro"; 43 #endif 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #ifdef PORTMAP 48 /* 49 * rpc_soc.c 50 * 51 * The backward compatibility routines for the earlier implementation 52 * of RPC, where the only transports supported were tcp/ip and udp/ip. 53 * Based on berkeley socket abstraction, now implemented on the top 54 * of TLI/Streams 55 */ 56 57 #include "namespace.h" 58 #include "reentrant.h" 59 #include <sys/types.h> 60 #include <sys/socket.h> 61 #include <stdio.h> 62 #include <rpc/rpc.h> 63 #include <rpc/pmap_clnt.h> 64 #include <rpc/pmap_prot.h> 65 #include <rpc/nettype.h> 66 #include <syslog.h> 67 #include <netinet/in.h> 68 #include <netdb.h> 69 #include <errno.h> 70 #include <syslog.h> 71 #include <stdlib.h> 72 #include <string.h> 73 #include <unistd.h> 74 #include "un-namespace.h" 75 76 #include "rpc_com.h" 77 #include "mt_misc.h" 78 79 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t, 80 int *, u_int, u_int, char *); 81 static SVCXPRT *svc_com_create(int, u_int, u_int, char *); 82 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *); 83 84 /* XXX */ 85 #define IN4_LOCALHOST_STRING "127.0.0.1" 86 #define IN6_LOCALHOST_STRING "::1" 87 88 /* 89 * A common clnt create routine 90 */ 91 static CLIENT * 92 clnt_com_create(raddr, prog, vers, sockp, sendsz, recvsz, tp) 93 struct sockaddr_in *raddr; 94 rpcprog_t prog; 95 rpcvers_t vers; 96 int *sockp; 97 u_int sendsz; 98 u_int recvsz; 99 char *tp; 100 { 101 CLIENT *cl; 102 int madefd = FALSE; 103 int fd = *sockp; 104 struct netconfig *nconf; 105 struct netbuf bindaddr; 106 107 mutex_lock(&rpcsoc_lock); 108 if ((nconf = __rpc_getconfip(tp)) == NULL) { 109 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 110 mutex_unlock(&rpcsoc_lock); 111 return (NULL); 112 } 113 if (fd == RPC_ANYSOCK) { 114 fd = __rpc_nconf2fd(nconf); 115 if (fd == -1) 116 goto syserror; 117 madefd = TRUE; 118 } 119 120 if (raddr->sin_port == 0) { 121 u_int proto; 122 u_short sport; 123 124 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */ 125 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP; 126 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers, 127 proto); 128 if (sport == 0) { 129 goto err; 130 } 131 raddr->sin_port = htons(sport); 132 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */ 133 } 134 135 /* Transform sockaddr_in to netbuf */ 136 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in); 137 bindaddr.buf = raddr; 138 139 bindresvport(fd, NULL); 140 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers, 141 sendsz, recvsz); 142 if (cl) { 143 if (madefd == TRUE) { 144 /* 145 * The fd should be closed while destroying the handle. 146 */ 147 (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL); 148 *sockp = fd; 149 } 150 (void) freenetconfigent(nconf); 151 mutex_unlock(&rpcsoc_lock); 152 return (cl); 153 } 154 goto err; 155 156 syserror: 157 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 158 rpc_createerr.cf_error.re_errno = errno; 159 160 err: if (madefd == TRUE) 161 (void)_close(fd); 162 (void) freenetconfigent(nconf); 163 mutex_unlock(&rpcsoc_lock); 164 return (NULL); 165 } 166 167 CLIENT * 168 clntudp_bufcreate(raddr, prog, vers, wait, sockp, sendsz, recvsz) 169 struct sockaddr_in *raddr; 170 u_long prog; 171 u_long vers; 172 struct timeval wait; 173 int *sockp; 174 u_int sendsz; 175 u_int recvsz; 176 { 177 CLIENT *cl; 178 179 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 180 sendsz, recvsz, "udp"); 181 if (cl == NULL) { 182 return (NULL); 183 } 184 (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait); 185 return (cl); 186 } 187 188 CLIENT * 189 clntudp_create(raddr, program, version, wait, sockp) 190 struct sockaddr_in *raddr; 191 u_long program; 192 u_long version; 193 struct timeval wait; 194 int *sockp; 195 { 196 197 return clntudp_bufcreate(raddr, program, version, wait, sockp, 198 UDPMSGSIZE, UDPMSGSIZE); 199 } 200 201 CLIENT * 202 clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz) 203 struct sockaddr_in *raddr; 204 u_long prog; 205 u_long vers; 206 int *sockp; 207 u_int sendsz; 208 u_int recvsz; 209 { 210 211 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 212 sendsz, recvsz, "tcp"); 213 } 214 215 CLIENT * 216 clntraw_create(prog, vers) 217 u_long prog; 218 u_long vers; 219 { 220 221 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers); 222 } 223 224 /* 225 * A common server create routine 226 */ 227 static SVCXPRT * 228 svc_com_create(fd, sendsize, recvsize, netid) 229 int fd; 230 u_int sendsize; 231 u_int recvsize; 232 char *netid; 233 { 234 struct netconfig *nconf; 235 SVCXPRT *svc; 236 int madefd = FALSE; 237 int port; 238 struct sockaddr_in sin; 239 240 if ((nconf = __rpc_getconfip(netid)) == NULL) { 241 (void) syslog(LOG_ERR, "Could not get %s transport", netid); 242 return (NULL); 243 } 244 if (fd == RPC_ANYSOCK) { 245 fd = __rpc_nconf2fd(nconf); 246 if (fd == -1) { 247 (void) freenetconfigent(nconf); 248 (void) syslog(LOG_ERR, 249 "svc%s_create: could not open connection", netid); 250 return (NULL); 251 } 252 madefd = TRUE; 253 } 254 255 memset(&sin, 0, sizeof sin); 256 sin.sin_family = AF_INET; 257 bindresvport(fd, &sin); 258 _listen(fd, SOMAXCONN); 259 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize); 260 (void) freenetconfigent(nconf); 261 if (svc == NULL) { 262 if (madefd) 263 (void)_close(fd); 264 return (NULL); 265 } 266 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port); 267 svc->xp_port = ntohs(port); 268 return (svc); 269 } 270 271 SVCXPRT * 272 svctcp_create(fd, sendsize, recvsize) 273 int fd; 274 u_int sendsize; 275 u_int recvsize; 276 { 277 278 return svc_com_create(fd, sendsize, recvsize, "tcp"); 279 } 280 281 SVCXPRT * 282 svcudp_bufcreate(fd, sendsz, recvsz) 283 int fd; 284 u_int sendsz, recvsz; 285 { 286 287 return svc_com_create(fd, sendsz, recvsz, "udp"); 288 } 289 290 SVCXPRT * 291 svcfd_create(fd, sendsize, recvsize) 292 int fd; 293 u_int sendsize; 294 u_int recvsize; 295 { 296 297 return svc_fd_create(fd, sendsize, recvsize); 298 } 299 300 301 SVCXPRT * 302 svcudp_create(fd) 303 int fd; 304 { 305 306 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp"); 307 } 308 309 SVCXPRT * 310 svcraw_create() 311 { 312 313 return svc_raw_create(); 314 } 315 316 int 317 get_myaddress(addr) 318 struct sockaddr_in *addr; 319 { 320 321 memset((void *) addr, 0, sizeof(*addr)); 322 addr->sin_family = AF_INET; 323 addr->sin_port = htons(PMAPPORT); 324 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 325 return (0); 326 } 327 328 /* 329 * For connectionless "udp" transport. Obsoleted by rpc_call(). 330 */ 331 int 332 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 333 const char *host; 334 int prognum, versnum, procnum; 335 xdrproc_t inproc, outproc; 336 void *in, *out; 337 { 338 339 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum, 340 (rpcproc_t)procnum, inproc, in, outproc, out, "udp"); 341 } 342 343 /* 344 * For connectionless kind of transport. Obsoleted by rpc_reg() 345 */ 346 int 347 registerrpc(prognum, versnum, procnum, progname, inproc, outproc) 348 int prognum, versnum, procnum; 349 char *(*progname)(char [UDPMSGSIZE]); 350 xdrproc_t inproc, outproc; 351 { 352 353 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum, 354 (rpcproc_t)procnum, progname, inproc, outproc, "udp"); 355 } 356 357 /* 358 * All the following clnt_broadcast stuff is convulated; it supports 359 * the earlier calling style of the callback function 360 */ 361 static thread_key_t clnt_broadcast_key; 362 static resultproc_t clnt_broadcast_result_main; 363 static once_t clnt_broadcast_once = ONCE_INITIALIZER; 364 365 static void 366 clnt_broadcast_key_init(void) 367 { 368 369 thr_keycreate(&clnt_broadcast_key, free); 370 } 371 372 /* 373 * Need to translate the netbuf address into sockaddr_in address. 374 * Dont care about netid here. 375 */ 376 /* ARGSUSED */ 377 static bool_t 378 rpc_wrap_bcast(resultp, addr, nconf) 379 char *resultp; /* results of the call */ 380 struct netbuf *addr; /* address of the guy who responded */ 381 struct netconfig *nconf; /* Netconf of the transport */ 382 { 383 resultproc_t clnt_broadcast_result; 384 385 if (strcmp(nconf->nc_netid, "udp")) 386 return (FALSE); 387 if (thr_main()) 388 clnt_broadcast_result = clnt_broadcast_result_main; 389 else 390 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key); 391 return (*clnt_broadcast_result)(resultp, 392 (struct sockaddr_in *)addr->buf); 393 } 394 395 /* 396 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast(). 397 */ 398 enum clnt_stat 399 clnt_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult) 400 u_long prog; /* program number */ 401 u_long vers; /* version number */ 402 u_long proc; /* procedure number */ 403 xdrproc_t xargs; /* xdr routine for args */ 404 void *argsp; /* pointer to args */ 405 xdrproc_t xresults; /* xdr routine for results */ 406 void *resultsp; /* pointer to results */ 407 resultproc_t eachresult; /* call with each result obtained */ 408 { 409 410 if (thr_main()) 411 clnt_broadcast_result_main = eachresult; 412 else { 413 thr_once(&clnt_broadcast_once, clnt_broadcast_key_init); 414 thr_setspecific(clnt_broadcast_key, (void *) eachresult); 415 } 416 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers, 417 (rpcproc_t)proc, xargs, argsp, xresults, resultsp, 418 (resultproc_t) rpc_wrap_bcast, "udp"); 419 } 420 421 /* 422 * Create the client des authentication object. Obsoleted by 423 * authdes_seccreate(). 424 */ 425 AUTH * 426 authdes_create(servername, window, syncaddr, ckey) 427 char *servername; /* network name of server */ 428 u_int window; /* time to live */ 429 struct sockaddr *syncaddr; /* optional hostaddr to sync with */ 430 des_block *ckey; /* optional conversation key to use */ 431 { 432 AUTH *dummy; 433 AUTH *nauth; 434 char hostname[NI_MAXHOST]; 435 436 if (syncaddr) { 437 /* 438 * Change addr to hostname, because that is the way 439 * new interface takes it. 440 */ 441 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname, 442 sizeof hostname, NULL, 0, 0) != 0) 443 goto fallback; 444 445 nauth = authdes_seccreate(servername, window, hostname, ckey); 446 return (nauth); 447 } 448 fallback: 449 dummy = authdes_seccreate(servername, window, NULL, ckey); 450 return (dummy); 451 } 452 453 /* 454 * Create a client handle for a unix connection. Obsoleted by clnt_vc_create() 455 */ 456 CLIENT * 457 clntunix_create(raddr, prog, vers, sockp, sendsz, recvsz) 458 struct sockaddr_un *raddr; 459 u_long prog; 460 u_long vers; 461 int *sockp; 462 u_int sendsz; 463 u_int recvsz; 464 { 465 struct netbuf *svcaddr; 466 struct netconfig *nconf; 467 CLIENT *cl; 468 int len; 469 470 cl = NULL; 471 nconf = NULL; 472 svcaddr = NULL; 473 if ((raddr->sun_len == 0) || 474 ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) || 475 ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) { 476 if (svcaddr != NULL) 477 free(svcaddr); 478 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 479 rpc_createerr.cf_error.re_errno = errno; 480 return(cl); 481 } 482 if (*sockp < 0) { 483 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0); 484 len = raddr->sun_len = SUN_LEN(raddr); 485 if ((*sockp < 0) || (_connect(*sockp, 486 (struct sockaddr *)raddr, len) < 0)) { 487 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 488 rpc_createerr.cf_error.re_errno = errno; 489 if (*sockp != -1) 490 (void)_close(*sockp); 491 goto done; 492 } 493 } 494 svcaddr->buf = raddr; 495 svcaddr->len = raddr->sun_len; 496 svcaddr->maxlen = sizeof (struct sockaddr_un); 497 cl = clnt_vc_create(*sockp, svcaddr, prog, 498 vers, sendsz, recvsz); 499 done: 500 free(svcaddr->buf); 501 free(svcaddr); 502 return(cl); 503 } 504 505 /* 506 * Creates, registers, and returns a (rpc) unix based transporter. 507 * Obsoleted by svc_vc_create(). 508 */ 509 SVCXPRT * 510 svcunix_create(sock, sendsize, recvsize, path) 511 int sock; 512 u_int sendsize; 513 u_int recvsize; 514 char *path; 515 { 516 struct netconfig *nconf; 517 void *localhandle; 518 struct sockaddr_un sun; 519 struct sockaddr *sa; 520 struct t_bind taddr; 521 SVCXPRT *xprt; 522 int addrlen; 523 524 xprt = (SVCXPRT *)NULL; 525 localhandle = setnetconfig(); 526 while ((nconf = getnetconfig(localhandle)) != NULL) { 527 if (nconf->nc_protofmly != NULL && 528 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 529 break; 530 } 531 if (nconf == NULL) 532 return(xprt); 533 534 if ((sock = __rpc_nconf2fd(nconf)) < 0) 535 goto done; 536 537 memset(&sun, 0, sizeof sun); 538 sun.sun_family = AF_LOCAL; 539 if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >= 540 sizeof(sun.sun_path)) 541 goto done; 542 sun.sun_len = SUN_LEN(&sun); 543 addrlen = sizeof (struct sockaddr_un); 544 sa = (struct sockaddr *)&sun; 545 546 if (_bind(sock, sa, addrlen) < 0) 547 goto done; 548 549 taddr.addr.len = taddr.addr.maxlen = addrlen; 550 taddr.addr.buf = malloc(addrlen); 551 if (taddr.addr.buf == NULL) 552 goto done; 553 memcpy(taddr.addr.buf, sa, addrlen); 554 555 if (nconf->nc_semantics != NC_TPI_CLTS) { 556 if (_listen(sock, SOMAXCONN) < 0) { 557 free(taddr.addr.buf); 558 goto done; 559 } 560 } 561 562 xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize); 563 564 done: 565 endnetconfig(localhandle); 566 return(xprt); 567 } 568 569 /* 570 * Like svunix_create(), except the routine takes any *open* UNIX file 571 * descriptor as its first input. Obsoleted by svc_fd_create(); 572 */ 573 SVCXPRT * 574 svcunixfd_create(fd, sendsize, recvsize) 575 int fd; 576 u_int sendsize; 577 u_int recvsize; 578 { 579 return (svc_fd_create(fd, sendsize, recvsize)); 580 } 581 582 #endif /* PORTMAP */ 583