1 /* $NetBSD: rpc_soc.c,v 1.23 2015/11/13 15:23:17 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2010, Oracle America, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: 9 * 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above 13 * copyright notice, this list of conditions and the following 14 * disclaimer in the documentation and/or other materials 15 * provided with the distribution. 16 * * Neither the name of the "Oracle America, 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 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 25 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 27 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* #ident "@(#)rpc_soc.c 1.17 94/04/24 SMI" */ 35 36 /* 37 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 38 * In addition, portions of such source code were derived from Berkeley 39 * 4.3 BSD under license from the Regents of the University of 40 * California. 41 */ 42 43 #include <sys/cdefs.h> 44 #if defined(LIBC_SCCS) && !defined(lint) 45 #if 0 46 static char sccsid[] = "@(#)rpc_soc.c 1.41 89/05/02 Copyr 1988 Sun Micro"; 47 #else 48 __RCSID("$NetBSD: rpc_soc.c,v 1.23 2015/11/13 15:23:17 christos Exp $"); 49 #endif 50 #endif 51 52 #ifdef PORTMAP 53 /* 54 * rpc_soc.c 55 * 56 * The backward compatibility routines for the earlier implementation 57 * of RPC, where the only transports supported were tcp/ip and udp/ip. 58 * Based on berkeley socket abstraction, now implemented on the top 59 * of TLI/Streams 60 */ 61 62 #include "namespace.h" 63 #include "reentrant.h" 64 #include <sys/types.h> 65 #include <sys/socket.h> 66 #include <stdio.h> 67 #include <rpc/rpc.h> 68 #include <rpc/pmap_clnt.h> 69 #include <rpc/pmap_prot.h> 70 #include <rpc/nettype.h> 71 #include <netinet/in.h> 72 #include <assert.h> 73 #include <errno.h> 74 #include <netdb.h> 75 #include <stdlib.h> 76 #include <string.h> 77 #include <syslog.h> 78 #include <unistd.h> 79 80 #include "svc_fdset.h" 81 #include "rpc_internal.h" 82 83 #ifdef __weak_alias 84 __weak_alias(clntudp_bufcreate,_clntudp_bufcreate) 85 __weak_alias(clntudp_create,_clntudp_create) 86 __weak_alias(clnttcp_create,_clnttcp_create) 87 __weak_alias(clntraw_create,_clntraw_create) 88 __weak_alias(get_myaddress,_get_myaddress) 89 __weak_alias(svcfd_create,_svcfd_create) 90 __weak_alias(svcudp_bufcreate,_svcudp_bufcreate) 91 __weak_alias(svcudp_create,_svcudp_create) 92 __weak_alias(svctcp_create,_svctcp_create) 93 __weak_alias(svcraw_create,_svcraw_create) 94 __weak_alias(callrpc,_callrpc) 95 __weak_alias(registerrpc,_registerrpc) 96 __weak_alias(clnt_broadcast,_clnt_broadcast) 97 #endif 98 99 #ifdef _REENTRANT 100 extern mutex_t rpcsoc_lock; 101 #endif 102 103 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t, 104 int *, u_int, u_int, const char *); 105 static SVCXPRT *svc_com_create(int, u_int, u_int, const char *); 106 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *); 107 108 /* 109 * A common clnt create routine 110 */ 111 static CLIENT * 112 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers, 113 int *sockp, u_int sendsz, u_int recvsz, const char *tp) 114 { 115 CLIENT *cl; 116 int madefd = FALSE; 117 int fd; 118 struct netconfig *nconf; 119 struct netbuf bindaddr; 120 121 _DIAGASSERT(raddr != NULL); 122 _DIAGASSERT(sockp != NULL); 123 _DIAGASSERT(tp != NULL); 124 125 fd = *sockp; 126 127 mutex_lock(&rpcsoc_lock); 128 if ((nconf = __rpc_getconfip(tp)) == NULL) { 129 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 130 mutex_unlock(&rpcsoc_lock); 131 return (NULL); 132 } 133 if (fd == RPC_ANYSOCK) { 134 fd = __rpc_nconf2fd(nconf); 135 if (fd == -1) 136 goto syserror; 137 madefd = TRUE; 138 } 139 140 if (raddr->sin_port == 0) { 141 u_int proto; 142 u_short sport; 143 144 mutex_unlock(&rpcsoc_lock); /* pmap_getport is recursive */ 145 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP; 146 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers, 147 proto); 148 if (sport == 0) { 149 goto err; 150 } 151 raddr->sin_port = htons(sport); 152 mutex_lock(&rpcsoc_lock); /* pmap_getport is recursive */ 153 } 154 155 /* Transform sockaddr_in to netbuf */ 156 bindaddr.maxlen = bindaddr.len = sizeof (struct sockaddr_in); 157 bindaddr.buf = raddr; 158 159 (void)bindresvport(fd, NULL); 160 cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers, 161 sendsz, recvsz); 162 if (cl) { 163 if (madefd == TRUE) { 164 /* 165 * The fd should be closed while destroying the handle. 166 */ 167 (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL); 168 *sockp = fd; 169 } 170 (void) freenetconfigent(nconf); 171 mutex_unlock(&rpcsoc_lock); 172 return (cl); 173 } 174 goto err; 175 176 syserror: 177 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 178 rpc_createerr.cf_error.re_errno = errno; 179 180 err: if (madefd == TRUE) 181 (void) close(fd); 182 (void) freenetconfigent(nconf); 183 mutex_unlock(&rpcsoc_lock); 184 return (NULL); 185 } 186 187 CLIENT * 188 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers, struct timeval wait, int *sockp, u_int sendsz, u_int recvsz) 189 { 190 CLIENT *cl; 191 192 _DIAGASSERT(raddr != NULL); 193 _DIAGASSERT(sockp != NULL); 194 195 cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 196 sendsz, recvsz, "udp"); 197 if (cl == NULL) { 198 return (NULL); 199 } 200 (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, (char *)(void *)&wait); 201 return (cl); 202 } 203 204 CLIENT * 205 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version, 206 struct timeval wait, int *sockp) 207 { 208 return clntudp_bufcreate(raddr, program, version, wait, sockp, 209 UDPMSGSIZE, UDPMSGSIZE); 210 } 211 212 CLIENT * 213 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp, 214 u_int sendsz, u_int recvsz) 215 { 216 return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp, 217 sendsz, recvsz, "tcp"); 218 } 219 220 CLIENT * 221 clntraw_create(u_long prog, u_long vers) 222 { 223 return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers); 224 } 225 226 /* 227 * A common server create routine 228 */ 229 static SVCXPRT * 230 svc_com_create(int fd, u_int sendsize, u_int recvsize, const char *netid) 231 { 232 struct netconfig *nconf; 233 SVCXPRT *svc; 234 int madefd = FALSE; 235 int port; 236 struct sockaddr_in sccsin; 237 238 _DIAGASSERT(netid != NULL); 239 240 if ((nconf = __rpc_getconfip(netid)) == NULL) { 241 (void) syslog(LOG_ERR, "Could not get %s transport", netid); 242 return (NULL); 243 } 244 if (fd == RPC_ANYSOCK) { 245 fd = __rpc_nconf2fd(nconf); 246 if (fd == -1) { 247 (void) freenetconfigent(nconf); 248 (void) syslog(LOG_ERR, 249 "svc%s_create: could not open connection", netid); 250 return (NULL); 251 } 252 madefd = TRUE; 253 } 254 255 memset(&sccsin, 0, sizeof sccsin); 256 sccsin.sin_family = AF_INET; 257 (void)bindresvport(fd, &sccsin); 258 259 switch (nconf->nc_semantics) { 260 case NC_TPI_COTS: 261 case NC_TPI_COTS_ORD: 262 if (listen(fd, SOMAXCONN) == -1) { 263 (void) syslog(LOG_ERR, 264 "svc%s_create: listen(2) failed: %s", 265 netid, strerror(errno)); 266 (void) freenetconfigent(nconf); 267 goto out; 268 } 269 break; 270 default: 271 break; 272 } 273 274 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize); 275 (void) freenetconfigent(nconf); 276 if (svc == NULL) 277 goto out; 278 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port); 279 svc->xp_port = ntohs(port); 280 return svc; 281 out: 282 if (madefd) 283 (void) close(fd); 284 return NULL; 285 } 286 287 SVCXPRT * 288 svctcp_create(int fd, u_int sendsize, u_int recvsize) 289 { 290 return svc_com_create(fd, sendsize, recvsize, "tcp"); 291 } 292 293 SVCXPRT * 294 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz) 295 { 296 return svc_com_create(fd, sendsz, recvsz, "udp"); 297 } 298 299 SVCXPRT * 300 svcfd_create(int fd, u_int sendsize, u_int recvsize) 301 { 302 return svc_fd_create(fd, sendsize, recvsize); 303 } 304 305 306 SVCXPRT * 307 svcudp_create(int fd) 308 { 309 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp"); 310 } 311 312 SVCXPRT * 313 svcraw_create(void) 314 { 315 return svc_raw_create(); 316 } 317 318 int 319 get_myaddress(struct sockaddr_in *addr) 320 { 321 322 _DIAGASSERT(addr != NULL); 323 324 memset((void *) addr, 0, sizeof(*addr)); 325 addr->sin_family = AF_INET; 326 addr->sin_port = htons(PMAPPORT); 327 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 328 return (0); 329 } 330 331 /* 332 * For connectionless "udp" transport. Obsoleted by rpc_call(). 333 */ 334 int 335 callrpc(char *host, int prognum, int versnum, int procnum, 336 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 337 { 338 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum, 339 (rpcproc_t)procnum, inproc, in, outproc, out, "udp"); 340 } 341 342 /* 343 * For connectionless kind of transport. Obsoleted by rpc_reg() 344 */ 345 int 346 registerrpc(int prognum, int versnum, int procnum, 347 char *(*progname)(char [UDPMSGSIZE]), 348 xdrproc_t inproc, xdrproc_t outproc) 349 { 350 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum, 351 (rpcproc_t)procnum, progname, inproc, outproc, __UNCONST("udp")); 352 } 353 354 /* 355 * All the following clnt_broadcast stuff is convulated; it supports 356 * the earlier calling style of the callback function 357 */ 358 #ifdef _REENTRANT 359 static thread_key_t clnt_broadcast_key; 360 #endif 361 static resultproc_t clnt_broadcast_result_main; 362 363 /* 364 * Need to translate the netbuf address into sockaddr_in address. 365 * Dont care about netid here. 366 */ 367 /* ARGSUSED */ 368 static bool_t 369 rpc_wrap_bcast( 370 char *resultp, /* results of the call */ 371 struct netbuf *addr, /* address of the guy who responded */ 372 struct netconfig *nconf) /* Netconf of the transport */ 373 { 374 resultproc_t clnt_broadcast_result; 375 376 _DIAGASSERT(resultp != NULL); 377 _DIAGASSERT(addr != NULL); 378 _DIAGASSERT(nconf != NULL); 379 380 if (strcmp(nconf->nc_netid, "udp")) 381 return (FALSE); 382 #ifdef _REENTRANT 383 if (__isthreaded == 0) 384 clnt_broadcast_result = clnt_broadcast_result_main; 385 else 386 clnt_broadcast_result = thr_getspecific(clnt_broadcast_key); 387 #else 388 clnt_broadcast_result = clnt_broadcast_result_main; 389 #endif 390 return (*clnt_broadcast_result)(resultp, 391 (struct sockaddr_in *)addr->buf); 392 } 393 394 #ifdef _REENTRANT 395 static once_t clnt_broadcast_once = ONCE_INITIALIZER; 396 397 static void 398 clnt_broadcast_setup(void) 399 { 400 401 thr_keycreate(&clnt_broadcast_key, free); 402 } 403 #endif 404 405 /* 406 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast(). 407 */ 408 enum clnt_stat 409 clnt_broadcast( 410 u_long prog, /* program number */ 411 u_long vers, /* version number */ 412 u_long proc, /* procedure number */ 413 xdrproc_t xargs, /* xdr routine for args */ 414 caddr_t argsp, /* pointer to args */ 415 xdrproc_t xresults, /* xdr routine for results */ 416 caddr_t resultsp, /* pointer to results */ 417 resultproc_t eachresult) /* call with each result obtained */ 418 { 419 #ifdef _REENTRANT 420 if (__isthreaded == 0) 421 clnt_broadcast_result_main = eachresult; 422 else { 423 thr_once(&clnt_broadcast_once, clnt_broadcast_setup); 424 thr_setspecific(clnt_broadcast_key, (void *) eachresult); 425 } 426 #else 427 clnt_broadcast_result_main = eachresult; 428 #endif 429 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers, 430 (rpcproc_t)proc, xargs, argsp, xresults, resultsp, 431 (resultproc_t) rpc_wrap_bcast, "udp"); 432 } 433 434 #endif /* PORTMAP */ 435