1 /* $NetBSD: rpc_soc.c,v 1.13 2010/12/08 02:06:38 joerg 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 #include <sys/cdefs.h> 42 #if defined(LIBC_SCCS) && !defined(lint) 43 #if 0 44 static char sccsid[] = "@(#)rpc_soc.c 1.41 89/05/02 Copyr 1988 Sun Micro"; 45 #else 46 __RCSID("$NetBSD: rpc_soc.c,v 1.13 2010/12/08 02:06:38 joerg Exp $"); 47 #endif 48 #endif 49 50 #ifdef PORTMAP 51 /* 52 * rpc_soc.c 53 * 54 * The backward compatibility routines for the earlier implementation 55 * of RPC, where the only transports supported were tcp/ip and udp/ip. 56 * Based on berkeley socket abstraction, now implemented on the top 57 * of TLI/Streams 58 */ 59 60 #include "namespace.h" 61 #include "reentrant.h" 62 #include <sys/types.h> 63 #include <sys/socket.h> 64 #include <stdio.h> 65 #include <rpc/rpc.h> 66 #include <rpc/pmap_clnt.h> 67 #include <rpc/pmap_prot.h> 68 #include <rpc/nettype.h> 69 #include <netinet/in.h> 70 #include <assert.h> 71 #include <errno.h> 72 #include <netdb.h> 73 #include <stdlib.h> 74 #include <string.h> 75 #include <syslog.h> 76 #include <unistd.h> 77 78 #include "rpc_internal.h" 79 80 #ifdef __weak_alias 81 __weak_alias(clntudp_bufcreate,_clntudp_bufcreate) 82 __weak_alias(clntudp_create,_clntudp_create) 83 __weak_alias(clnttcp_create,_clnttcp_create) 84 __weak_alias(clntraw_create,_clntraw_create) 85 __weak_alias(get_myaddress,_get_myaddress) 86 __weak_alias(svcfd_create,_svcfd_create) 87 __weak_alias(svcudp_bufcreate,_svcudp_bufcreate) 88 __weak_alias(svcudp_create,_svcudp_create) 89 __weak_alias(svctcp_create,_svctcp_create) 90 __weak_alias(svcraw_create,_svcraw_create) 91 __weak_alias(callrpc,_callrpc) 92 __weak_alias(registerrpc,_registerrpc) 93 __weak_alias(clnt_broadcast,_clnt_broadcast) 94 #endif 95 96 #ifdef _REENTRANT 97 extern mutex_t rpcsoc_lock; 98 #endif 99 100 static CLIENT *clnt_com_create __P((struct sockaddr_in *, rpcprog_t, rpcvers_t, 101 int *, u_int, u_int, const char *)); 102 static SVCXPRT *svc_com_create __P((int, u_int, u_int, const char *)); 103 static bool_t rpc_wrap_bcast __P((char *, struct netbuf *, struct netconfig *)); 104 105 /* 106 * A common clnt create routine 107 */ 108 static CLIENT * 109 clnt_com_create(raddr, prog, vers, sockp, sendsz, recvsz, tp) 110 struct sockaddr_in *raddr; 111 rpcprog_t prog; 112 rpcvers_t vers; 113 int *sockp; 114 u_int sendsz; 115 u_int recvsz; 116 const char *tp; 117 { 118 CLIENT *cl; 119 int madefd = FALSE; 120 int fd; 121 struct netconfig *nconf; 122 struct netbuf bindaddr; 123 124 _DIAGASSERT(raddr != NULL); 125 _DIAGASSERT(sockp != NULL); 126 _DIAGASSERT(tp != NULL); 127 128 fd = *sockp; 129 130 mutex_lock(&rpcsoc_lock); 131 if ((nconf = __rpc_getconfip(tp)) == NULL) { 132 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 133 mutex_unlock(&rpcsoc_lock); 134 return (NULL); 135 } 136 if (fd == RPC_ANYSOCK) { 137 fd = __rpc_nconf2fd(nconf); 138 if (fd == -1) 139 goto syserror; 140 madefd = TRUE; 141 } 142 143 if (raddr->sin_port == 0) { 144 u_int proto; 145 u_short sport; 146 147 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */ 148 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP; 149 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers, 150 proto); 151 if (sport == 0) { 152 goto err; 153 } 154 raddr->sin_port = htons(sport); 155 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */ 156 } 157 158 /* Transform sockaddr_in to netbuf */ 159 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in); 160 bindaddr.buf = raddr; 161 162 bindresvport(fd, NULL); 163 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers, 164 sendsz, recvsz); 165 if (cl) { 166 if (madefd == TRUE) { 167 /* 168 * The fd should be closed while destroying the handle. 169 */ 170 (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL); 171 *sockp = fd; 172 } 173 (void) freenetconfigent(nconf); 174 mutex_unlock(&rpcsoc_lock); 175 return (cl); 176 } 177 goto err; 178 179 syserror: 180 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 181 rpc_createerr.cf_error.re_errno = errno; 182 183 err: if (madefd == TRUE) 184 (void) close(fd); 185 (void) freenetconfigent(nconf); 186 mutex_unlock(&rpcsoc_lock); 187 return (NULL); 188 } 189 190 CLIENT * 191 clntudp_bufcreate(raddr, prog, vers, wait, sockp, sendsz, recvsz) 192 struct sockaddr_in *raddr; 193 u_long prog; 194 u_long vers; 195 struct timeval wait; 196 int *sockp; 197 u_int sendsz; 198 u_int recvsz; 199 { 200 CLIENT *cl; 201 202 _DIAGASSERT(raddr != NULL); 203 _DIAGASSERT(sockp != NULL); 204 205 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 206 sendsz, recvsz, "udp"); 207 if (cl == NULL) { 208 return (NULL); 209 } 210 (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, (char *)(void *)&wait); 211 return (cl); 212 } 213 214 CLIENT * 215 clntudp_create(raddr, program, version, wait, sockp) 216 struct sockaddr_in *raddr; 217 u_long program; 218 u_long version; 219 struct timeval wait; 220 int *sockp; 221 { 222 return clntudp_bufcreate(raddr, program, version, wait, sockp, 223 UDPMSGSIZE, UDPMSGSIZE); 224 } 225 226 CLIENT * 227 clnttcp_create(raddr, prog, vers, sockp, sendsz, recvsz) 228 struct sockaddr_in *raddr; 229 u_long prog; 230 u_long vers; 231 int *sockp; 232 u_int sendsz; 233 u_int recvsz; 234 { 235 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 236 sendsz, recvsz, "tcp"); 237 } 238 239 CLIENT * 240 clntraw_create(prog, vers) 241 u_long prog; 242 u_long vers; 243 { 244 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers); 245 } 246 247 /* 248 * A common server create routine 249 */ 250 static SVCXPRT * 251 svc_com_create(fd, sendsize, recvsize, netid) 252 int fd; 253 u_int sendsize; 254 u_int recvsize; 255 const char *netid; 256 { 257 struct netconfig *nconf; 258 SVCXPRT *svc; 259 int madefd = FALSE; 260 int port; 261 struct sockaddr_in sccsin; 262 263 _DIAGASSERT(netid != NULL); 264 265 if ((nconf = __rpc_getconfip(netid)) == NULL) { 266 (void) syslog(LOG_ERR, "Could not get %s transport", netid); 267 return (NULL); 268 } 269 if (fd == RPC_ANYSOCK) { 270 fd = __rpc_nconf2fd(nconf); 271 if (fd == -1) { 272 (void) freenetconfigent(nconf); 273 (void) syslog(LOG_ERR, 274 "svc%s_create: could not open connection", netid); 275 return (NULL); 276 } 277 madefd = TRUE; 278 } 279 280 memset(&sccsin, 0, sizeof sccsin); 281 sccsin.sin_family = AF_INET; 282 bindresvport(fd, &sccsin); 283 listen(fd, SOMAXCONN); 284 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize); 285 (void) freenetconfigent(nconf); 286 if (svc == NULL) { 287 if (madefd) 288 (void) close(fd); 289 return (NULL); 290 } 291 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port); 292 svc->xp_port = ntohs(port); 293 return (svc); 294 } 295 296 SVCXPRT * 297 svctcp_create(fd, sendsize, recvsize) 298 int fd; 299 u_int sendsize; 300 u_int recvsize; 301 { 302 return svc_com_create(fd, sendsize, recvsize, "tcp"); 303 } 304 305 SVCXPRT * 306 svcudp_bufcreate(fd, sendsz, recvsz) 307 int fd; 308 u_int sendsz, recvsz; 309 { 310 return svc_com_create(fd, sendsz, recvsz, "udp"); 311 } 312 313 SVCXPRT * 314 svcfd_create(fd, sendsize, recvsize) 315 int fd; 316 u_int sendsize; 317 u_int recvsize; 318 { 319 return svc_fd_create(fd, sendsize, recvsize); 320 } 321 322 323 SVCXPRT * 324 svcudp_create(fd) 325 int fd; 326 { 327 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp"); 328 } 329 330 SVCXPRT * 331 svcraw_create() 332 { 333 return svc_raw_create(); 334 } 335 336 int 337 get_myaddress(addr) 338 struct sockaddr_in *addr; 339 { 340 341 _DIAGASSERT(addr != NULL); 342 343 memset((void *) addr, 0, sizeof(*addr)); 344 addr->sin_family = AF_INET; 345 addr->sin_port = htons(PMAPPORT); 346 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 347 return (0); 348 } 349 350 /* 351 * For connectionless "udp" transport. Obsoleted by rpc_call(). 352 */ 353 int 354 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 355 char *host; 356 int prognum, versnum, procnum; 357 xdrproc_t inproc, outproc; 358 char *in, *out; 359 { 360 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum, 361 (rpcproc_t)procnum, inproc, in, outproc, out, "udp"); 362 } 363 364 /* 365 * For connectionless kind of transport. Obsoleted by rpc_reg() 366 */ 367 int 368 registerrpc(prognum, versnum, procnum, progname, inproc, outproc) 369 int prognum, versnum, procnum; 370 char *(*progname) __P((char [UDPMSGSIZE])); 371 xdrproc_t inproc, outproc; 372 { 373 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum, 374 (rpcproc_t)procnum, progname, inproc, outproc, __UNCONST("udp")); 375 } 376 377 /* 378 * All the following clnt_broadcast stuff is convulated; it supports 379 * the earlier calling style of the callback function 380 */ 381 #ifdef _REENTRANT 382 static thread_key_t clnt_broadcast_key; 383 #endif 384 static resultproc_t clnt_broadcast_result_main; 385 386 /* 387 * Need to translate the netbuf address into sockaddr_in address. 388 * Dont care about netid here. 389 */ 390 /* ARGSUSED */ 391 static bool_t 392 rpc_wrap_bcast(resultp, addr, nconf) 393 char *resultp; /* results of the call */ 394 struct netbuf *addr; /* address of the guy who responded */ 395 struct netconfig *nconf; /* Netconf of the transport */ 396 { 397 resultproc_t clnt_broadcast_result; 398 399 _DIAGASSERT(resultp != NULL); 400 _DIAGASSERT(addr != NULL); 401 _DIAGASSERT(nconf != NULL); 402 403 if (strcmp(nconf->nc_netid, "udp")) 404 return (FALSE); 405 #ifdef _REENTRANT 406 if (__isthreaded == 0) 407 clnt_broadcast_result = clnt_broadcast_result_main; 408 else 409 clnt_broadcast_result = thr_getspecific(clnt_broadcast_key); 410 #else 411 clnt_broadcast_result = clnt_broadcast_result_main; 412 #endif 413 return (*clnt_broadcast_result)(resultp, 414 (struct sockaddr_in *)addr->buf); 415 } 416 417 #ifdef _REENTRANT 418 static once_t clnt_broadcast_once = ONCE_INITIALIZER; 419 420 static void 421 clnt_broadcast_setup(void) 422 { 423 424 thr_keycreate(&clnt_broadcast_key, free); 425 } 426 #endif 427 428 /* 429 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast(). 430 */ 431 enum clnt_stat 432 clnt_broadcast(prog, vers, proc, xargs, argsp, xresults, resultsp, eachresult) 433 u_long prog; /* program number */ 434 u_long vers; /* version number */ 435 u_long proc; /* procedure number */ 436 xdrproc_t xargs; /* xdr routine for args */ 437 caddr_t argsp; /* pointer to args */ 438 xdrproc_t xresults; /* xdr routine for results */ 439 caddr_t resultsp; /* pointer to results */ 440 resultproc_t eachresult; /* call with each result obtained */ 441 { 442 #ifdef _REENTRANT 443 if (__isthreaded == 0) 444 clnt_broadcast_result_main = eachresult; 445 else { 446 thr_once(&clnt_broadcast_once, clnt_broadcast_setup); 447 thr_setspecific(clnt_broadcast_key, (void *) eachresult); 448 } 449 #else 450 clnt_broadcast_result_main = eachresult; 451 #endif 452 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers, 453 (rpcproc_t)proc, xargs, argsp, xresults, resultsp, 454 (resultproc_t) rpc_wrap_bcast, "udp"); 455 } 456 457 #endif /* PORTMAP */ 458