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 * @(#)rpc_soc.c 1.17 94/04/24 SMI; 1.41 89/05/02 Copyr 1988 Sun Micro 29 * $NetBSD: rpc_soc.c,v 1.6 2000/07/06 03:10:35 christos Exp $ 30 * $FreeBSD: src/lib/libc/rpc/rpc_soc.c,v 1.15 2006/02/27 22:10:59 deischen Exp $ 31 * $DragonFly$ 32 */ 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 #ifdef PORTMAP 42 /* 43 * rpc_soc.c 44 * 45 * The backward compatibility routines for the earlier implementation 46 * of RPC, where the only transports supported were tcp/ip and udp/ip. 47 * Based on berkeley socket abstraction, now implemented on the top 48 * of TLI/Streams 49 */ 50 51 #include "namespace.h" 52 #include "reentrant.h" 53 #include <sys/types.h> 54 #include <sys/socket.h> 55 #include <stdio.h> 56 #include <rpc/rpc.h> 57 #include <rpc/pmap_clnt.h> 58 #include <rpc/pmap_prot.h> 59 #include <rpc/nettype.h> 60 #include <syslog.h> 61 #include <netinet/in.h> 62 #include <netdb.h> 63 #include <errno.h> 64 #include <syslog.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include "un-namespace.h" 69 70 #include "rpc_com.h" 71 #include "mt_misc.h" 72 73 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t, 74 int *, u_int, u_int, char *); 75 static SVCXPRT *svc_com_create(int, u_int, u_int, char *); 76 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *); 77 78 /* XXX */ 79 #define IN4_LOCALHOST_STRING "127.0.0.1" 80 #define IN6_LOCALHOST_STRING "::1" 81 82 /* 83 * A common clnt create routine 84 */ 85 static CLIENT * 86 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers, 87 int *sockp, u_int sendsz, u_int recvsz, char *tp) 88 { 89 CLIENT *cl; 90 int madefd = FALSE; 91 int fd = *sockp; 92 struct netconfig *nconf; 93 struct netbuf bindaddr; 94 95 mutex_lock(&rpcsoc_lock); 96 if ((nconf = __rpc_getconfip(tp)) == NULL) { 97 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 98 mutex_unlock(&rpcsoc_lock); 99 return (NULL); 100 } 101 if (fd == RPC_ANYSOCK) { 102 fd = __rpc_nconf2fd(nconf); 103 if (fd == -1) 104 goto syserror; 105 madefd = TRUE; 106 } 107 108 if (raddr->sin_port == 0) { 109 u_int proto; 110 u_short sport; 111 112 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */ 113 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP; 114 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers, 115 proto); 116 if (sport == 0) { 117 goto err; 118 } 119 raddr->sin_port = htons(sport); 120 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */ 121 } 122 123 /* Transform sockaddr_in to netbuf */ 124 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in); 125 bindaddr.buf = raddr; 126 127 bindresvport(fd, NULL); 128 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers, 129 sendsz, recvsz); 130 if (cl) { 131 if (madefd == TRUE) { 132 /* 133 * The fd should be closed while destroying the handle. 134 */ 135 CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL); 136 *sockp = fd; 137 } 138 freenetconfigent(nconf); 139 mutex_unlock(&rpcsoc_lock); 140 return (cl); 141 } 142 goto err; 143 144 syserror: 145 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 146 rpc_createerr.cf_error.re_errno = errno; 147 148 err: if (madefd == TRUE) 149 _close(fd); 150 freenetconfigent(nconf); 151 mutex_unlock(&rpcsoc_lock); 152 return (NULL); 153 } 154 155 CLIENT * 156 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers, 157 struct timeval wait, int *sockp, u_int sendsz, u_int recvsz) 158 { 159 CLIENT *cl; 160 161 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 162 sendsz, recvsz, "udp"); 163 if (cl == NULL) { 164 return (NULL); 165 } 166 CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait); 167 return (cl); 168 } 169 170 CLIENT * 171 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version, 172 struct timeval wait, int *sockp) 173 { 174 175 return clntudp_bufcreate(raddr, program, version, wait, sockp, 176 UDPMSGSIZE, UDPMSGSIZE); 177 } 178 179 CLIENT * 180 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp, 181 u_int sendsz, u_int recvsz) 182 { 183 184 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 185 sendsz, recvsz, "tcp"); 186 } 187 188 CLIENT * 189 clntraw_create(u_long prog, u_long vers) 190 { 191 192 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers); 193 } 194 195 /* 196 * A common server create routine 197 */ 198 static SVCXPRT * 199 svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid) 200 { 201 struct netconfig *nconf; 202 SVCXPRT *svc; 203 int madefd = FALSE; 204 int port; 205 struct sockaddr_in sin; 206 207 if ((nconf = __rpc_getconfip(netid)) == NULL) { 208 syslog(LOG_ERR, "Could not get %s transport", netid); 209 return (NULL); 210 } 211 if (fd == RPC_ANYSOCK) { 212 fd = __rpc_nconf2fd(nconf); 213 if (fd == -1) { 214 freenetconfigent(nconf); 215 syslog(LOG_ERR, 216 "svc%s_create: could not open connection", netid); 217 return (NULL); 218 } 219 madefd = TRUE; 220 } 221 222 memset(&sin, 0, sizeof sin); 223 sin.sin_family = AF_INET; 224 bindresvport(fd, &sin); 225 _listen(fd, SOMAXCONN); 226 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize); 227 freenetconfigent(nconf); 228 if (svc == NULL) { 229 if (madefd) 230 _close(fd); 231 return (NULL); 232 } 233 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port); 234 svc->xp_port = ntohs(port); 235 return (svc); 236 } 237 238 SVCXPRT * 239 svctcp_create(int fd, u_int sendsize, u_int recvsize) 240 { 241 242 return svc_com_create(fd, sendsize, recvsize, "tcp"); 243 } 244 245 SVCXPRT * 246 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz) 247 { 248 249 return svc_com_create(fd, sendsz, recvsz, "udp"); 250 } 251 252 SVCXPRT * 253 svcfd_create(int fd, u_int sendsize, u_int recvsize) 254 { 255 256 return svc_fd_create(fd, sendsize, recvsize); 257 } 258 259 260 SVCXPRT * 261 svcudp_create(int fd) 262 { 263 264 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp"); 265 } 266 267 SVCXPRT * 268 svcraw_create(void) 269 { 270 271 return svc_raw_create(); 272 } 273 274 int 275 get_myaddress(struct sockaddr_in *addr) 276 { 277 278 memset((void *) addr, 0, sizeof(*addr)); 279 addr->sin_family = AF_INET; 280 addr->sin_port = htons(PMAPPORT); 281 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 282 return (0); 283 } 284 285 /* 286 * For connectionless "udp" transport. Obsoleted by rpc_call(). 287 */ 288 int 289 callrpc(const char *host, int prognum, int versnum, int procnum, 290 xdrproc_t inproc, void *in, xdrproc_t outproc, void *out) 291 { 292 293 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum, 294 (rpcproc_t)procnum, inproc, in, outproc, out, "udp"); 295 } 296 297 /* 298 * For connectionless kind of transport. Obsoleted by rpc_reg() 299 */ 300 int 301 registerrpc(int prognum, int versnum, int procnum, char *(*progname)(char *), 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; 315 316 /* 317 * Need to translate the netbuf address into sockaddr_in address. 318 * Dont care about netid here. 319 */ 320 /* ARGSUSED */ 321 static bool_t 322 rpc_wrap_bcast(char *resultp, /* results of the call */ 323 struct netbuf *addr, /* address of the guy who responded */ 324 struct netconfig *nconf) /* Netconf of the transport */ 325 { 326 resultproc_t clnt_broadcast_result; 327 328 if (strcmp(nconf->nc_netid, "udp")) 329 return (FALSE); 330 if (thr_main()) 331 clnt_broadcast_result = clnt_broadcast_result_main; 332 else 333 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key); 334 return (*clnt_broadcast_result)(resultp, 335 (struct sockaddr_in *)addr->buf); 336 } 337 338 /* 339 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast(). 340 */ 341 enum clnt_stat 342 clnt_broadcast(u_long prog, /* program number */ 343 u_long vers, /* version number */ 344 u_long proc, /* procedure number */ 345 xdrproc_t xargs, /* xdr routine for args */ 346 void *argsp, /* pointer to args */ 347 xdrproc_t xresults, /* xdr routine for results */ 348 void *resultsp, /* pointer to results */ 349 resultproc_t eachresult) /* call with each result obtained */ 350 { 351 352 if (thr_main()) 353 clnt_broadcast_result_main = eachresult; 354 else { 355 if (clnt_broadcast_key == 0) { 356 mutex_lock(&tsd_lock); 357 if (clnt_broadcast_key == 0) 358 thr_keycreate(&clnt_broadcast_key, free); 359 mutex_unlock(&tsd_lock); 360 } 361 thr_setspecific(clnt_broadcast_key, (void *) eachresult); 362 } 363 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers, 364 (rpcproc_t)proc, xargs, argsp, xresults, resultsp, 365 (resultproc_t) rpc_wrap_bcast, "udp"); 366 } 367 368 /* 369 * Create the client des authentication object. Obsoleted by 370 * authdes_seccreate(). 371 */ 372 AUTH * 373 authdes_create(char *servername, /* network name of server */ 374 u_int window, /* time to live */ 375 struct sockaddr *syncaddr,/* optional hostaddr to sync with */ 376 des_block *ckey) /* optional conversation key to use */ 377 { 378 AUTH *dummy; 379 AUTH *nauth; 380 char hostname[NI_MAXHOST]; 381 382 if (syncaddr) { 383 /* 384 * Change addr to hostname, because that is the way 385 * new interface takes it. 386 */ 387 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname, 388 sizeof hostname, NULL, 0, 0) != 0) 389 goto fallback; 390 391 nauth = authdes_seccreate(servername, window, hostname, ckey); 392 return (nauth); 393 } 394 fallback: 395 dummy = authdes_seccreate(servername, window, NULL, ckey); 396 return (dummy); 397 } 398 399 /* 400 * Create a client handle for a unix connection. Obsoleted by clnt_vc_create() 401 */ 402 CLIENT * 403 clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp, 404 u_int sendsz, u_int recvsz) 405 { 406 struct netbuf *svcaddr; 407 struct netconfig *nconf; 408 CLIENT *cl; 409 int len; 410 411 cl = NULL; 412 nconf = NULL; 413 svcaddr = NULL; 414 if ((raddr->sun_len == 0) || 415 ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) || 416 ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) { 417 if (svcaddr != NULL) 418 free(svcaddr); 419 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 420 rpc_createerr.cf_error.re_errno = errno; 421 return(cl); 422 } 423 if (*sockp < 0) { 424 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0); 425 len = raddr->sun_len = SUN_LEN(raddr); 426 if ((*sockp < 0) || (_connect(*sockp, 427 (struct sockaddr *)raddr, len) < 0)) { 428 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 429 rpc_createerr.cf_error.re_errno = errno; 430 if (*sockp != -1) 431 _close(*sockp); 432 goto done; 433 } 434 } 435 svcaddr->buf = raddr; 436 svcaddr->len = raddr->sun_len; 437 svcaddr->maxlen = sizeof (struct sockaddr_un); 438 cl = clnt_vc_create(*sockp, svcaddr, prog, 439 vers, sendsz, recvsz); 440 done: 441 free(svcaddr->buf); 442 free(svcaddr); 443 return(cl); 444 } 445 446 /* 447 * Creates, registers, and returns a (rpc) unix based transporter. 448 * Obsoleted by svc_vc_create(). 449 */ 450 SVCXPRT * 451 svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path) 452 { 453 struct netconfig *nconf; 454 void *localhandle; 455 struct sockaddr_un sun; 456 struct sockaddr *sa; 457 struct t_bind taddr; 458 SVCXPRT *xprt; 459 int addrlen; 460 461 xprt = (SVCXPRT *)NULL; 462 localhandle = setnetconfig(); 463 while ((nconf = getnetconfig(localhandle)) != NULL) { 464 if (nconf->nc_protofmly != NULL && 465 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 466 break; 467 } 468 if (nconf == NULL) 469 return(xprt); 470 471 if ((sock = __rpc_nconf2fd(nconf)) < 0) 472 goto done; 473 474 memset(&sun, 0, sizeof sun); 475 sun.sun_family = AF_LOCAL; 476 if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >= 477 sizeof(sun.sun_path)) 478 goto done; 479 sun.sun_len = SUN_LEN(&sun); 480 addrlen = sizeof (struct sockaddr_un); 481 sa = (struct sockaddr *)&sun; 482 483 if (_bind(sock, sa, addrlen) < 0) 484 goto done; 485 486 taddr.addr.len = taddr.addr.maxlen = addrlen; 487 taddr.addr.buf = malloc(addrlen); 488 if (taddr.addr.buf == NULL) 489 goto done; 490 memcpy(taddr.addr.buf, sa, addrlen); 491 492 if (nconf->nc_semantics != NC_TPI_CLTS) { 493 if (_listen(sock, SOMAXCONN) < 0) { 494 free(taddr.addr.buf); 495 goto done; 496 } 497 } 498 499 xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize); 500 501 done: 502 endnetconfig(localhandle); 503 return(xprt); 504 } 505 506 /* 507 * Like svunix_create(), except the routine takes any *open* UNIX file 508 * descriptor as its first input. Obsoleted by svc_fd_create(); 509 */ 510 SVCXPRT * 511 svcunixfd_create(int fd, u_int sendsize, u_int recvsize) 512 { 513 return (svc_fd_create(fd, sendsize, recvsize)); 514 } 515 516 #endif /* PORTMAP */ 517