lib/libc/rpc/rpc_soc.c

   1 /*      $NetBSD: rpc_soc.c,v 1.16 2012/06/25 22:32:45 abs 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 1.16 2012/06/25 22:32:45 abs 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(struct sockaddr_in *, rpcprog_t, rpcvers_t,
 101                                     int *, u_int, u_int, const char *);
 102 static SVCXPRT *svc_com_create(int, u_int, u_int, const char *);
 103 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
 104
 105 /*
 106  * A common clnt create routine
 107  */
 108 static CLIENT *
 109 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
 110         int *sockp, u_int sendsz, u_int recvsz, const char *tp)
 111 {
 112         CLIENT *cl;
 113         int madefd = FALSE;
 114         int fd;
 115         struct netconfig *nconf;
 116         struct netbuf bindaddr;
 117
 118         _DIAGASSERT(raddr != NULL);
 119         _DIAGASSERT(sockp != NULL);
 120         _DIAGASSERT(tp != NULL);
 121
 122         fd = *sockp;
 123
 124         mutex_lock(&rpcsoc_lock);
 125         if ((nconf = __rpc_getconfip(tp)) == NULL) {
 126                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 127                 mutex_unlock(&rpcsoc_lock);
 128                 return (NULL);
 129         }
 130         if (fd == RPC_ANYSOCK) {
 131                 fd = __rpc_nconf2fd(nconf);
 132                 if (fd == -1)
 133                         goto syserror;
 134                 madefd = TRUE;
 135         }
 136
 137         if (raddr->sin_port == 0) {
 138                 u_int proto;
 139                 u_short sport;
 140
 141                 mutex_unlock(&rpcsoc_lock);     /* pmap_getport is recursive */
 142                 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
 143                 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
 144                     proto);
 145                 if (sport == 0) {
 146                         goto err;
 147                 }
 148                 raddr->sin_port = htons(sport);
 149                 mutex_lock(&rpcsoc_lock);       /* pmap_getport is recursive */
 150         }
 151
 152         /* Transform sockaddr_in to netbuf */
 153         bindaddr.maxlen = bindaddr.len =  sizeof (struct sockaddr_in);
 154         bindaddr.buf = raddr;
 155
 156         bindresvport(fd, NULL);
 157         cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
 158                                 sendsz, recvsz);
 159         if (cl) {
 160                 if (madefd == TRUE) {
 161                         /*
 162                          * The fd should be closed while destroying the handle.
 163                          */
 164                         (void) CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
 165                         *sockp = fd;
 166                 }
 167                 (void) freenetconfigent(nconf);
 168                 mutex_unlock(&rpcsoc_lock);
 169                 return (cl);
 170         }
 171         goto err;
 172
 173 syserror:
 174         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 175         rpc_createerr.cf_error.re_errno = errno;
 176
 177 err:    if (madefd == TRUE)
 178                 (void) close(fd);
 179         (void) freenetconfigent(nconf);
 180         mutex_unlock(&rpcsoc_lock);
 181         return (NULL);
 182 }
 183
 184 CLIENT *
 185 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers, struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
 186 {
 187         CLIENT *cl;
 188
 189         _DIAGASSERT(raddr != NULL);
 190         _DIAGASSERT(sockp != NULL);
 191
 192         cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 193             sendsz, recvsz, "udp");
 194         if (cl == NULL) {
 195                 return (NULL);
 196         }
 197         (void) CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, (char *)(void *)&wait);
 198         return (cl);
 199 }
 200
 201 CLIENT *
 202 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
 203     struct timeval wait, int *sockp)
 204 {
 205         return clntudp_bufcreate(raddr, program, version, wait, sockp,
 206                                         UDPMSGSIZE, UDPMSGSIZE);
 207 }
 208
 209 CLIENT *
 210 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
 211     u_int sendsz, u_int recvsz)
 212 {
 213         return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 214             sendsz, recvsz, "tcp");
 215 }
 216
 217 CLIENT *
 218 clntraw_create(u_long prog, u_long vers)
 219 {
 220         return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
 221 }
 222
 223 /*
 224  * A common server create routine
 225  */
 226 static SVCXPRT *
 227 svc_com_create(int fd, u_int sendsize, u_int recvsize, const char *netid)
 228 {
 229         struct netconfig *nconf;
 230         SVCXPRT *svc;
 231         int madefd = FALSE;
 232         int port;
 233         struct sockaddr_in sccsin;
 234
 235         _DIAGASSERT(netid != NULL);
 236
 237         if ((nconf = __rpc_getconfip(netid)) == NULL) {
 238                 (void) syslog(LOG_ERR, "Could not get %s transport", netid);
 239                 return (NULL);
 240         }
 241         if (fd == RPC_ANYSOCK) {
 242                 fd = __rpc_nconf2fd(nconf);
 243                 if (fd == -1) {
 244                         (void) freenetconfigent(nconf);
 245                         (void) syslog(LOG_ERR,
 246                         "svc%s_create: could not open connection", netid);
 247                         return (NULL);
 248                 }
 249                 madefd = TRUE;
 250         }
 251
 252         memset(&sccsin, 0, sizeof sccsin);
 253         sccsin.sin_family = AF_INET;
 254         bindresvport(fd, &sccsin);
 255         listen(fd, SOMAXCONN);
 256         svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
 257         (void) freenetconfigent(nconf);
 258         if (svc == NULL) {
 259                 if (madefd)
 260                         (void) close(fd);
 261                 return (NULL);
 262         }
 263         port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
 264         svc->xp_port = ntohs(port);
 265         return (svc);
 266 }
 267
 268 SVCXPRT *
 269 svctcp_create(int fd, u_int sendsize, u_int recvsize)
 270 {
 271         return svc_com_create(fd, sendsize, recvsize, "tcp");
 272 }
 273
 274 SVCXPRT *
 275 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
 276 {
 277         return svc_com_create(fd, sendsz, recvsz, "udp");
 278 }
 279
 280 SVCXPRT *
 281 svcfd_create(int fd, u_int sendsize, u_int recvsize)
 282 {
 283         return svc_fd_create(fd, sendsize, recvsize);
 284 }
 285
 286
 287 SVCXPRT *
 288 svcudp_create(int fd)
 289 {
 290         return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
 291 }
 292
 293 SVCXPRT *
 294 svcraw_create(void)
 295 {
 296         return svc_raw_create();
 297 }
 298
 299 int
 300 get_myaddress(struct sockaddr_in *addr)
 301 {
 302
 303         _DIAGASSERT(addr != NULL);
 304
 305         memset((void *) addr, 0, sizeof(*addr));
 306         addr->sin_family = AF_INET;
 307         addr->sin_port = htons(PMAPPORT);
 308         addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 309         return (0);
 310 }
 311
 312 /*
 313  * For connectionless "udp" transport. Obsoleted by rpc_call().
 314  */
 315 int
 316 callrpc(char *host, int prognum, int versnum, int procnum,
 317         xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
 318 {
 319         return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
 320             (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
 321 }
 322
 323 /*
 324  * For connectionless kind of transport. Obsoleted by rpc_reg()
 325  */
 326 int
 327 registerrpc(int prognum, int versnum, int procnum,
 328         char *(*progname)(char [UDPMSGSIZE]),
 329         xdrproc_t inproc, xdrproc_t outproc)
 330 {
 331         return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
 332             (rpcproc_t)procnum, progname, inproc, outproc, __UNCONST("udp"));
 333 }
 334
 335 /*
 336  * All the following clnt_broadcast stuff is convulated; it supports
 337  * the earlier calling style of the callback function
 338  */
 339 #ifdef _REENTRANT
 340 static thread_key_t     clnt_broadcast_key;
 341 #endif
 342 static resultproc_t     clnt_broadcast_result_main;
 343
 344 /*
 345  * Need to translate the netbuf address into sockaddr_in address.
 346  * Dont care about netid here.
 347  */
 348 /* ARGSUSED */
 349 static bool_t
 350 rpc_wrap_bcast(
 351         char *resultp,          /* results of the call */
 352         struct netbuf *addr,    /* address of the guy who responded */
 353         struct netconfig *nconf) /* Netconf of the transport */
 354 {
 355         resultproc_t clnt_broadcast_result;
 356
 357         _DIAGASSERT(resultp != NULL);
 358         _DIAGASSERT(addr != NULL);
 359         _DIAGASSERT(nconf != NULL);
 360
 361         if (strcmp(nconf->nc_netid, "udp"))
 362                 return (FALSE);
 363 #ifdef _REENTRANT
 364         if (__isthreaded == 0)
 365                 clnt_broadcast_result = clnt_broadcast_result_main;
 366         else
 367                 clnt_broadcast_result = thr_getspecific(clnt_broadcast_key);
 368 #else
 369         clnt_broadcast_result = clnt_broadcast_result_main;
 370 #endif
 371         return (*clnt_broadcast_result)(resultp,
 372                                 (struct sockaddr_in *)addr->buf);
 373 }
 374
 375 #ifdef _REENTRANT
 376 static once_t clnt_broadcast_once = ONCE_INITIALIZER;
 377
 378 static void
 379 clnt_broadcast_setup(void)
 380 {
 381
 382         thr_keycreate(&clnt_broadcast_key, free);
 383 }
 384 #endif
 385
 386 /*
 387  * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
 388  */
 389 enum clnt_stat
 390 clnt_broadcast(
 391         u_long          prog,           /* program number */
 392         u_long          vers,           /* version number */
 393         u_long          proc,           /* procedure number */
 394         xdrproc_t       xargs,          /* xdr routine for args */
 395         caddr_t         argsp,          /* pointer to args */
 396         xdrproc_t       xresults,       /* xdr routine for results */
 397         caddr_t         resultsp,       /* pointer to results */
 398         resultproc_t    eachresult)     /* call with each result obtained */
 399 {
 400 #ifdef _REENTRANT
 401         if (__isthreaded == 0)
 402                 clnt_broadcast_result_main = eachresult;
 403         else {
 404                 thr_once(&clnt_broadcast_once, clnt_broadcast_setup);
 405                 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
 406         }
 407 #else
 408         clnt_broadcast_result_main = eachresult;
 409 #endif
 410         return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
 411             (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
 412             (resultproc_t) rpc_wrap_bcast, "udp");
 413 }
 414
 415 #endif /* PORTMAP */