1 /* $NetBSD: rpc_soc.c,v 1.6 2000/07/06 03:10:35 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* #ident "@(#)rpc_soc.c 1.17 94/04/24 SMI" */ 34 35 /* 36 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 37 * In addition, portions of such source code were derived from Berkeley 38 * 4.3 BSD under license from the Regents of the University of 39 * California. 40 */ 41 42 #if defined(LIBC_SCCS) && !defined(lint) 43 static char sccsid[] = "@(#)rpc_soc.c 1.41 89/05/02 Copyr 1988 Sun Micro"; 44 #endif 45 #include <sys/cdefs.h> 46 __FBSDID("$FreeBSD$"); 47 48 #ifdef PORTMAP 49 /* 50 * rpc_soc.c 51 * 52 * The backward compatibility routines for the earlier implementation 53 * of RPC, where the only transports supported were tcp/ip and udp/ip. 54 * Based on berkeley socket abstraction, now implemented on the top 55 * of TLI/Streams 56 */ 57 58 #include "namespace.h" 59 #include "reentrant.h" 60 #include <sys/types.h> 61 #include <sys/socket.h> 62 #include <stdio.h> 63 #include <rpc/rpc.h> 64 #include <rpc/pmap_clnt.h> 65 #include <rpc/pmap_prot.h> 66 #include <rpc/nettype.h> 67 #include <syslog.h> 68 #include <netinet/in.h> 69 #include <netdb.h> 70 #include <errno.h> 71 #include <syslog.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <unistd.h> 75 #include "un-namespace.h" 76 77 #include "rpc_com.h" 78 #include "mt_misc.h" 79 80 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t, 81 int *, u_int, u_int, char *); 82 static SVCXPRT *svc_com_create(int, u_int, u_int, char *); 83 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *); 84 85 /* XXX */ 86 #define IN4_LOCALHOST_STRING "127.0.0.1" 87 #define IN6_LOCALHOST_STRING "::1" 88 89 /* 90 * A common clnt create routine 91 */ 92 static CLIENT * 93 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers, int *sockp, 94 u_int sendsz, u_int recvsz, char *tp) 95 { 96 CLIENT *cl; 97 int madefd = FALSE; 98 int fd = *sockp; 99 struct netconfig *nconf; 100 struct netbuf bindaddr; 101 102 mutex_lock(&rpcsoc_lock); 103 if ((nconf = __rpc_getconfip(tp)) == NULL) { 104 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 105 mutex_unlock(&rpcsoc_lock); 106 return (NULL); 107 } 108 if (fd == RPC_ANYSOCK) { 109 fd = __rpc_nconf2fd(nconf); 110 if (fd == -1) 111 goto syserror; 112 madefd = TRUE; 113 } 114 115 if (raddr->sin_port == 0) { 116 u_int proto; 117 u_short sport; 118 119 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */ 120 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP; 121 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers, 122 proto); 123 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */ 124 if (sport == 0) { 125 goto err; 126 } 127 raddr->sin_port = htons(sport); 128 } 129 130 /* Transform sockaddr_in to netbuf */ 131 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in); 132 bindaddr.buf = raddr; 133 134 bindresvport(fd, NULL); 135 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers, 136 sendsz, recvsz); 137 if (cl) { 138 if (madefd == TRUE) { 139 /* 140 * The fd should be closed while destroying the handle. 141 */ 142 (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL); 143 *sockp = fd; 144 } 145 (void) freenetconfigent(nconf); 146 mutex_unlock(&rpcsoc_lock); 147 return (cl); 148 } 149 goto err; 150 151 syserror: 152 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 153 rpc_createerr.cf_error.re_errno = errno; 154 155 err: if (madefd == TRUE) 156 (void)_close(fd); 157 (void) freenetconfigent(nconf); 158 mutex_unlock(&rpcsoc_lock); 159 return (NULL); 160 } 161 162 CLIENT * 163 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers, 164 struct timeval wait, int *sockp, u_int sendsz, u_int recvsz) 165 { 166 CLIENT *cl; 167 168 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 169 sendsz, recvsz, "udp"); 170 if (cl == NULL) { 171 return (NULL); 172 } 173 (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait); 174 return (cl); 175 } 176 177 CLIENT * 178 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version, 179 struct timeval wait, int *sockp) 180 { 181 182 return clntudp_bufcreate(raddr, program, version, wait, sockp, 183 UDPMSGSIZE, UDPMSGSIZE); 184 } 185 186 CLIENT * 187 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp, 188 u_int sendsz, u_int recvsz) 189 { 190 191 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 192 sendsz, recvsz, "tcp"); 193 } 194 195 CLIENT * 196 clntraw_create(u_long prog, u_long vers) 197 { 198 199 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers); 200 } 201 202 /* 203 * A common server create routine 204 */ 205 static SVCXPRT * 206 svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid) 207 { 208 struct netconfig *nconf; 209 SVCXPRT *svc; 210 int madefd = FALSE; 211 int port; 212 struct sockaddr_in sin; 213 214 if ((nconf = __rpc_getconfip(netid)) == NULL) { 215 (void) syslog(LOG_ERR, "Could not get %s transport", netid); 216 return (NULL); 217 } 218 if (fd == RPC_ANYSOCK) { 219 fd = __rpc_nconf2fd(nconf); 220 if (fd == -1) { 221 (void) freenetconfigent(nconf); 222 (void) syslog(LOG_ERR, 223 "svc%s_create: could not open connection", netid); 224 return (NULL); 225 } 226 madefd = TRUE; 227 } 228 229 memset(&sin, 0, sizeof sin); 230 sin.sin_family = AF_INET; 231 bindresvport(fd, &sin); 232 _listen(fd, SOMAXCONN); 233 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize); 234 (void) freenetconfigent(nconf); 235 if (svc == NULL) { 236 if (madefd) 237 (void)_close(fd); 238 return (NULL); 239 } 240 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port); 241 svc->xp_port = ntohs(port); 242 return (svc); 243 } 244 245 SVCXPRT * 246 svctcp_create(int fd, u_int sendsize, u_int recvsize) 247 { 248 249 return svc_com_create(fd, sendsize, recvsize, "tcp"); 250 } 251 252 SVCXPRT * 253 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz) 254 { 255 256 return svc_com_create(fd, sendsz, recvsz, "udp"); 257 } 258 259 SVCXPRT * 260 svcfd_create(int fd, u_int sendsize, u_int recvsize) 261 { 262 263 return svc_fd_create(fd, sendsize, recvsize); 264 } 265 266 267 SVCXPRT * 268 svcudp_create(int fd) 269 { 270 271 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp"); 272 } 273 274 SVCXPRT * 275 svcraw_create(void) 276 { 277 278 return svc_raw_create(); 279 } 280 281 int 282 get_myaddress(struct sockaddr_in *addr) 283 { 284 285 memset((void *) addr, 0, sizeof(*addr)); 286 addr->sin_family = AF_INET; 287 addr->sin_port = htons(PMAPPORT); 288 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 289 return (0); 290 } 291 292 /* 293 * For connectionless "udp" transport. Obsoleted by rpc_call(). 294 */ 295 int 296 callrpc(const char *host, int prognum, int versnum, int procnum, 297 xdrproc_t inproc, void *in, xdrproc_t outproc, void *out) 298 { 299 300 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum, 301 (rpcproc_t)procnum, inproc, in, outproc, out, "udp"); 302 } 303 304 /* 305 * For connectionless kind of transport. Obsoleted by rpc_reg() 306 */ 307 int 308 registerrpc(int prognum, int versnum, int procnum, 309 char *(*progname)(char [UDPMSGSIZE]), 310 xdrproc_t inproc, xdrproc_t outproc) 311 { 312 313 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum, 314 (rpcproc_t)procnum, progname, inproc, outproc, "udp"); 315 } 316 317 /* 318 * All the following clnt_broadcast stuff is convulated; it supports 319 * the earlier calling style of the callback function 320 */ 321 static thread_key_t clnt_broadcast_key; 322 static resultproc_t clnt_broadcast_result_main; 323 static once_t clnt_broadcast_once = ONCE_INITIALIZER; 324 325 static void 326 clnt_broadcast_key_init(void) 327 { 328 329 thr_keycreate(&clnt_broadcast_key, free); 330 } 331 332 /* 333 * Need to translate the netbuf address into sockaddr_in address. 334 * Dont care about netid here. 335 */ 336 /* ARGSUSED */ 337 static bool_t 338 rpc_wrap_bcast(char *resultp, struct netbuf *addr, struct netconfig *nconf) 339 /* 340 * char *resultp; // results of the call 341 * struct netbuf *addr; // address of the guy who responded 342 * struct netconfig *nconf; // Netconf of the transport 343 */ 344 { 345 resultproc_t clnt_broadcast_result; 346 347 if (strcmp(nconf->nc_netid, "udp")) 348 return (FALSE); 349 if (thr_main()) 350 clnt_broadcast_result = clnt_broadcast_result_main; 351 else 352 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key); 353 return (*clnt_broadcast_result)(resultp, 354 (struct sockaddr_in *)addr->buf); 355 } 356 357 /* 358 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast(). 359 */ 360 enum clnt_stat 361 clnt_broadcast(u_long prog, u_long vers, u_long proc, xdrproc_t xargs, 362 void *argsp, xdrproc_t xresults, void *resultsp, resultproc_t eachresult) 363 /* 364 * u_long prog; // program number 365 * u_long vers; // version number 366 * u_long proc; // procedure number 367 * xdrproc_t xargs; // xdr routine for args 368 * void *argsp; // pointer to args 369 * xdrproc_t xresults; // xdr routine for results 370 * void *resultsp; // pointer to results 371 * resultproc_t eachresult; // call with each result obtained 372 */ 373 { 374 375 if (thr_main()) 376 clnt_broadcast_result_main = eachresult; 377 else { 378 thr_once(&clnt_broadcast_once, clnt_broadcast_key_init); 379 thr_setspecific(clnt_broadcast_key, (void *) eachresult); 380 } 381 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers, 382 (rpcproc_t)proc, xargs, argsp, xresults, resultsp, 383 (resultproc_t) rpc_wrap_bcast, "udp"); 384 } 385 386 /* 387 * Create the client des authentication object. Obsoleted by 388 * authdes_seccreate(). 389 */ 390 AUTH * 391 authdes_create(char *servername, u_int window, struct sockaddr *syncaddr, 392 des_block *ckey) 393 /* 394 * char *servername; // network name of server 395 * u_int window; // time to live 396 * struct sockaddr *syncaddr; // optional hostaddr to sync with 397 * des_block *ckey; // optional conversation key to use 398 */ 399 { 400 AUTH *dummy; 401 AUTH *nauth; 402 char hostname[NI_MAXHOST]; 403 404 if (syncaddr) { 405 /* 406 * Change addr to hostname, because that is the way 407 * new interface takes it. 408 */ 409 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname, 410 sizeof hostname, NULL, 0, 0) != 0) 411 goto fallback; 412 413 nauth = authdes_seccreate(servername, window, hostname, ckey); 414 return (nauth); 415 } 416 fallback: 417 dummy = authdes_seccreate(servername, window, NULL, ckey); 418 return (dummy); 419 } 420 421 /* 422 * Create a client handle for a unix connection. Obsoleted by clnt_vc_create() 423 */ 424 CLIENT * 425 clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp, 426 u_int sendsz, u_int recvsz) 427 { 428 struct netbuf *svcaddr; 429 CLIENT *cl; 430 int len; 431 432 cl = NULL; 433 svcaddr = NULL; 434 if ((raddr->sun_len == 0) || 435 ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) || 436 ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) { 437 free(svcaddr); 438 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 439 rpc_createerr.cf_error.re_errno = errno; 440 return(cl); 441 } 442 if (*sockp < 0) { 443 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0); 444 len = raddr->sun_len = SUN_LEN(raddr); 445 if ((*sockp < 0) || (_connect(*sockp, 446 (struct sockaddr *)raddr, len) < 0)) { 447 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 448 rpc_createerr.cf_error.re_errno = errno; 449 if (*sockp != -1) 450 (void)_close(*sockp); 451 goto done; 452 } 453 } 454 svcaddr->buf = raddr; 455 svcaddr->len = raddr->sun_len; 456 svcaddr->maxlen = sizeof (struct sockaddr_un); 457 cl = clnt_vc_create(*sockp, svcaddr, prog, 458 vers, sendsz, recvsz); 459 done: 460 free(svcaddr->buf); 461 free(svcaddr); 462 return(cl); 463 } 464 465 /* 466 * Creates, registers, and returns a (rpc) unix based transporter. 467 * Obsoleted by svc_vc_create(). 468 */ 469 SVCXPRT * 470 svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path) 471 { 472 struct netconfig *nconf; 473 void *localhandle; 474 struct sockaddr_un sun; 475 struct sockaddr *sa; 476 struct t_bind taddr; 477 SVCXPRT *xprt; 478 int addrlen; 479 480 xprt = (SVCXPRT *)NULL; 481 localhandle = setnetconfig(); 482 while ((nconf = getnetconfig(localhandle)) != NULL) { 483 if (nconf->nc_protofmly != NULL && 484 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 485 break; 486 } 487 if (nconf == NULL) 488 goto done; 489 490 if ((sock = __rpc_nconf2fd(nconf)) < 0) 491 goto done; 492 493 memset(&sun, 0, sizeof sun); 494 sun.sun_family = AF_LOCAL; 495 if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >= 496 sizeof(sun.sun_path)) 497 goto done; 498 sun.sun_len = SUN_LEN(&sun); 499 addrlen = sizeof (struct sockaddr_un); 500 sa = (struct sockaddr *)&sun; 501 502 if (_bind(sock, sa, addrlen) < 0) 503 goto done; 504 505 taddr.addr.len = taddr.addr.maxlen = addrlen; 506 taddr.addr.buf = malloc(addrlen); 507 if (taddr.addr.buf == NULL) 508 goto done; 509 memcpy(taddr.addr.buf, sa, addrlen); 510 511 if (nconf->nc_semantics != NC_TPI_CLTS) { 512 if (_listen(sock, SOMAXCONN) < 0) { 513 free(taddr.addr.buf); 514 goto done; 515 } 516 } 517 518 xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize); 519 520 done: 521 endnetconfig(localhandle); 522 return(xprt); 523 } 524 525 /* 526 * Like svunix_create(), except the routine takes any *open* UNIX file 527 * descriptor as its first input. Obsoleted by svc_fd_create(); 528 */ 529 SVCXPRT * 530 svcunixfd_create(int fd, u_int sendsize, u_int recvsize) 531 { 532 return (svc_fd_create(fd, sendsize, recvsize)); 533 } 534 535 #endif /* PORTMAP */ 536