lib/libc/rpc/rpc_soc.c

   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 */