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