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