1 /* $NetBSD: rpc_soc.c,v 1.19 2014/05/28 14:45:57 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 1.19 2014/05/28 14:45:57 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 listen(fd, SOMAXCONN); 259 svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize); 260 (void) freenetconfigent(nconf); 261 if (svc == NULL) { 262 if (madefd) 263 (void) close(fd); 264 return (NULL); 265 } 266 port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port); 267 svc->xp_port = ntohs(port); 268 return (svc); 269 } 270 271 SVCXPRT * 272 svctcp_create(int fd, u_int sendsize, u_int recvsize) 273 { 274 return svc_com_create(fd, sendsize, recvsize, "tcp"); 275 } 276 277 SVCXPRT * 278 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz) 279 { 280 return svc_com_create(fd, sendsz, recvsz, "udp"); 281 } 282 283 SVCXPRT * 284 svcfd_create(int fd, u_int sendsize, u_int recvsize) 285 { 286 return svc_fd_create(fd, sendsize, recvsize); 287 } 288 289 290 SVCXPRT * 291 svcudp_create(int fd) 292 { 293 return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp"); 294 } 295 296 SVCXPRT * 297 svcraw_create(void) 298 { 299 return svc_raw_create(); 300 } 301 302 int 303 get_myaddress(struct sockaddr_in *addr) 304 { 305 306 _DIAGASSERT(addr != NULL); 307 308 memset((void *) addr, 0, sizeof(*addr)); 309 addr->sin_family = AF_INET; 310 addr->sin_port = htons(PMAPPORT); 311 addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK); 312 return (0); 313 } 314 315 /* 316 * For connectionless "udp" transport. Obsoleted by rpc_call(). 317 */ 318 int 319 callrpc(char *host, int prognum, int versnum, int procnum, 320 xdrproc_t inproc, char *in, xdrproc_t outproc, char *out) 321 { 322 return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum, 323 (rpcproc_t)procnum, inproc, in, outproc, out, "udp"); 324 } 325 326 /* 327 * For connectionless kind of transport. Obsoleted by rpc_reg() 328 */ 329 int 330 registerrpc(int prognum, int versnum, int procnum, 331 char *(*progname)(char [UDPMSGSIZE]), 332 xdrproc_t inproc, xdrproc_t outproc) 333 { 334 return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum, 335 (rpcproc_t)procnum, progname, inproc, outproc, __UNCONST("udp")); 336 } 337 338 /* 339 * All the following clnt_broadcast stuff is convulated; it supports 340 * the earlier calling style of the callback function 341 */ 342 #ifdef _REENTRANT 343 static thread_key_t clnt_broadcast_key; 344 #endif 345 static resultproc_t clnt_broadcast_result_main; 346 347 /* 348 * Need to translate the netbuf address into sockaddr_in address. 349 * Dont care about netid here. 350 */ 351 /* ARGSUSED */ 352 static bool_t 353 rpc_wrap_bcast( 354 char *resultp, /* results of the call */ 355 struct netbuf *addr, /* address of the guy who responded */ 356 struct netconfig *nconf) /* Netconf of the transport */ 357 { 358 resultproc_t clnt_broadcast_result; 359 360 _DIAGASSERT(resultp != NULL); 361 _DIAGASSERT(addr != NULL); 362 _DIAGASSERT(nconf != NULL); 363 364 if (strcmp(nconf->nc_netid, "udp")) 365 return (FALSE); 366 #ifdef _REENTRANT 367 if (__isthreaded == 0) 368 clnt_broadcast_result = clnt_broadcast_result_main; 369 else 370 clnt_broadcast_result = thr_getspecific(clnt_broadcast_key); 371 #else 372 clnt_broadcast_result = clnt_broadcast_result_main; 373 #endif 374 return (*clnt_broadcast_result)(resultp, 375 (struct sockaddr_in *)addr->buf); 376 } 377 378 #ifdef _REENTRANT 379 static once_t clnt_broadcast_once = ONCE_INITIALIZER; 380 381 static void 382 clnt_broadcast_setup(void) 383 { 384 385 thr_keycreate(&clnt_broadcast_key, free); 386 } 387 #endif 388 389 /* 390 * Broadcasts on UDP transport. Obsoleted by rpc_broadcast(). 391 */ 392 enum clnt_stat 393 clnt_broadcast( 394 u_long prog, /* program number */ 395 u_long vers, /* version number */ 396 u_long proc, /* procedure number */ 397 xdrproc_t xargs, /* xdr routine for args */ 398 caddr_t argsp, /* pointer to args */ 399 xdrproc_t xresults, /* xdr routine for results */ 400 caddr_t resultsp, /* pointer to results */ 401 resultproc_t eachresult) /* call with each result obtained */ 402 { 403 #ifdef _REENTRANT 404 if (__isthreaded == 0) 405 clnt_broadcast_result_main = eachresult; 406 else { 407 thr_once(&clnt_broadcast_once, clnt_broadcast_setup); 408 thr_setspecific(clnt_broadcast_key, (void *) eachresult); 409 } 410 #else 411 clnt_broadcast_result_main = eachresult; 412 #endif 413 return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers, 414 (rpcproc_t)proc, xargs, argsp, xresults, resultsp, 415 (resultproc_t) rpc_wrap_bcast, "udp"); 416 } 417 418 #endif /* PORTMAP */ 419