lib/libc/rpc/rpc_soc.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  * @(#)rpc_soc.c        1.17    94/04/24 SMI; 1.41 89/05/02 Copyr 1988 Sun Micro
  29  * $NetBSD: rpc_soc.c,v 1.6 2000/07/06 03:10:35 christos Exp $
  30  * $FreeBSD: src/lib/libc/rpc/rpc_soc.c,v 1.15 2006/02/27 22:10:59 deischen Exp $
  31  * $DragonFly$
  32  */
  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 #ifdef PORTMAP
  42 /*
  43  * rpc_soc.c
  44  *
  45  * The backward compatibility routines for the earlier implementation
  46  * of RPC, where the only transports supported were tcp/ip and udp/ip.
  47  * Based on berkeley socket abstraction, now implemented on the top
  48  * of TLI/Streams
  49  */
  50
  51 #include "namespace.h"
  52 #include "reentrant.h"
  53 #include <sys/types.h>
  54 #include <sys/socket.h>
  55 #include <stdio.h>
  56 #include <rpc/rpc.h>
  57 #include <rpc/pmap_clnt.h>
  58 #include <rpc/pmap_prot.h>
  59 #include <rpc/nettype.h>
  60 #include <syslog.h>
  61 #include <netinet/in.h>
  62 #include <netdb.h>
  63 #include <errno.h>
  64 #include <syslog.h>
  65 #include <stdlib.h>
  66 #include <string.h>
  67 #include <unistd.h>
  68 #include "un-namespace.h"
  69
  70 #include "rpc_com.h"
  71 #include "mt_misc.h"
  72
  73 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
  74     int *, u_int, u_int, char *);
  75 static SVCXPRT *svc_com_create(int, u_int, u_int, char *);
  76 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
  77
  78 /* XXX */
  79 #define IN4_LOCALHOST_STRING    "127.0.0.1"
  80 #define IN6_LOCALHOST_STRING    "::1"
  81
  82 /*
  83  * A common clnt create routine
  84  */
  85 static CLIENT *
  86 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
  87                 int *sockp, u_int sendsz, u_int recvsz, char *tp)
  88 {
  89         CLIENT *cl;
  90         int madefd = FALSE;
  91         int fd = *sockp;
  92         struct netconfig *nconf;
  93         struct netbuf bindaddr;
  94
  95         mutex_lock(&rpcsoc_lock);
  96         if ((nconf = __rpc_getconfip(tp)) == NULL) {
  97                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
  98                 mutex_unlock(&rpcsoc_lock);
  99                 return (NULL);
 100         }
 101         if (fd == RPC_ANYSOCK) {
 102                 fd = __rpc_nconf2fd(nconf);
 103                 if (fd == -1)
 104                         goto syserror;
 105                 madefd = TRUE;
 106         }
 107
 108         if (raddr->sin_port == 0) {
 109                 u_int proto;
 110                 u_short sport;
 111
 112                 mutex_unlock(&rpcsoc_lock);     /* pmap_getport is recursive */
 113                 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
 114                 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
 115                     proto);
 116                 if (sport == 0) {
 117                         goto err;
 118                 }
 119                 raddr->sin_port = htons(sport);
 120                 mutex_lock(&rpcsoc_lock);       /* pmap_getport is recursive */
 121         }
 122
 123         /* Transform sockaddr_in to netbuf */
 124         bindaddr.maxlen = bindaddr.len =  sizeof (struct sockaddr_in);
 125         bindaddr.buf = raddr;
 126
 127         bindresvport(fd, NULL);
 128         cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
 129                                 sendsz, recvsz);
 130         if (cl) {
 131                 if (madefd == TRUE) {
 132                         /*
 133                          * The fd should be closed while destroying the handle.
 134                          */
 135                         CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
 136                         *sockp = fd;
 137                 }
 138                 freenetconfigent(nconf);
 139                 mutex_unlock(&rpcsoc_lock);
 140                 return (cl);
 141         }
 142         goto err;
 143
 144 syserror:
 145         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 146         rpc_createerr.cf_error.re_errno = errno;
 147
 148 err:    if (madefd == TRUE)
 149                 _close(fd);
 150         freenetconfigent(nconf);
 151         mutex_unlock(&rpcsoc_lock);
 152         return (NULL);
 153 }
 154
 155 CLIENT *
 156 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers,
 157                   struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
 158 {
 159         CLIENT *cl;
 160
 161         cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 162             sendsz, recvsz, "udp");
 163         if (cl == NULL) {
 164                 return (NULL);
 165         }
 166         CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait);
 167         return (cl);
 168 }
 169
 170 CLIENT *
 171 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
 172                struct timeval wait, int *sockp)
 173 {
 174
 175         return clntudp_bufcreate(raddr, program, version, wait, sockp,
 176                                         UDPMSGSIZE, UDPMSGSIZE);
 177 }
 178
 179 CLIENT *
 180 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
 181                u_int sendsz, u_int recvsz)
 182 {
 183
 184         return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 185             sendsz, recvsz, "tcp");
 186 }
 187
 188 CLIENT *
 189 clntraw_create(u_long prog, u_long vers)
 190 {
 191
 192         return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
 193 }
 194
 195 /*
 196  * A common server create routine
 197  */
 198 static SVCXPRT *
 199 svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid)
 200 {
 201         struct netconfig *nconf;
 202         SVCXPRT *svc;
 203         int madefd = FALSE;
 204         int port;
 205         struct sockaddr_in sin;
 206
 207         if ((nconf = __rpc_getconfip(netid)) == NULL) {
 208                 syslog(LOG_ERR, "Could not get %s transport", netid);
 209                 return (NULL);
 210         }
 211         if (fd == RPC_ANYSOCK) {
 212                 fd = __rpc_nconf2fd(nconf);
 213                 if (fd == -1) {
 214                         freenetconfigent(nconf);
 215                         syslog(LOG_ERR,
 216                         "svc%s_create: could not open connection", netid);
 217                         return (NULL);
 218                 }
 219                 madefd = TRUE;
 220         }
 221
 222         memset(&sin, 0, sizeof sin);
 223         sin.sin_family = AF_INET;
 224         bindresvport(fd, &sin);
 225         _listen(fd, SOMAXCONN);
 226         svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
 227         freenetconfigent(nconf);
 228         if (svc == NULL) {
 229                 if (madefd)
 230                         _close(fd);
 231                 return (NULL);
 232         }
 233         port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
 234         svc->xp_port = ntohs(port);
 235         return (svc);
 236 }
 237
 238 SVCXPRT *
 239 svctcp_create(int fd, u_int sendsize, u_int recvsize)
 240 {
 241
 242         return svc_com_create(fd, sendsize, recvsize, "tcp");
 243 }
 244
 245 SVCXPRT *
 246 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
 247 {
 248
 249         return svc_com_create(fd, sendsz, recvsz, "udp");
 250 }
 251
 252 SVCXPRT *
 253 svcfd_create(int fd, u_int sendsize, u_int recvsize)
 254 {
 255
 256         return svc_fd_create(fd, sendsize, recvsize);
 257 }
 258
 259
 260 SVCXPRT *
 261 svcudp_create(int fd)
 262 {
 263
 264         return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
 265 }
 266
 267 SVCXPRT *
 268 svcraw_create(void)
 269 {
 270
 271         return svc_raw_create();
 272 }
 273
 274 int
 275 get_myaddress(struct sockaddr_in *addr)
 276 {
 277
 278         memset((void *) addr, 0, sizeof(*addr));
 279         addr->sin_family = AF_INET;
 280         addr->sin_port = htons(PMAPPORT);
 281         addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 282         return (0);
 283 }
 284
 285 /*
 286  * For connectionless "udp" transport. Obsoleted by rpc_call().
 287  */
 288 int
 289 callrpc(const char *host, int prognum, int versnum, int procnum,
 290         xdrproc_t inproc, void *in, xdrproc_t outproc, void *out)
 291 {
 292
 293         return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
 294             (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
 295 }
 296
 297 /*
 298  * For connectionless kind of transport. Obsoleted by rpc_reg()
 299  */
 300 int
 301 registerrpc(int prognum, int versnum, int procnum, char *(*progname)(char *),
 302             xdrproc_t inproc, xdrproc_t outproc)
 303 {
 304
 305         return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
 306             (rpcproc_t)procnum, progname, inproc, outproc, "udp");
 307 }
 308
 309 /*
 310  * All the following clnt_broadcast stuff is convulated; it supports
 311  * the earlier calling style of the callback function
 312  */
 313 static thread_key_t     clnt_broadcast_key;
 314 static resultproc_t     clnt_broadcast_result_main;
 315
 316 /*
 317  * Need to translate the netbuf address into sockaddr_in address.
 318  * Dont care about netid here.
 319  */
 320 /* ARGSUSED */
 321 static bool_t
 322 rpc_wrap_bcast(char *resultp,           /* results of the call */
 323                struct netbuf *addr,     /* address of the guy who responded */
 324                struct netconfig *nconf) /* Netconf of the transport */
 325 {
 326         resultproc_t clnt_broadcast_result;
 327
 328         if (strcmp(nconf->nc_netid, "udp"))
 329                 return (FALSE);
 330         if (thr_main())
 331                 clnt_broadcast_result = clnt_broadcast_result_main;
 332         else
 333                 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key);
 334         return (*clnt_broadcast_result)(resultp,
 335                                 (struct sockaddr_in *)addr->buf);
 336 }
 337
 338 /*
 339  * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
 340  */
 341 enum clnt_stat
 342 clnt_broadcast(u_long           prog,           /* program number */
 343                u_long           vers,           /* version number */
 344                u_long           proc,           /* procedure number */
 345                xdrproc_t        xargs,          /* xdr routine for args */
 346                void            *argsp,          /* pointer to args */
 347                xdrproc_t        xresults,       /* xdr routine for results */
 348                void            *resultsp,       /* pointer to results */
 349                resultproc_t     eachresult)     /* call with each result obtained */
 350 {
 351
 352         if (thr_main())
 353                 clnt_broadcast_result_main = eachresult;
 354         else {
 355                 if (clnt_broadcast_key == 0) {
 356                         mutex_lock(&tsd_lock);
 357                         if (clnt_broadcast_key == 0)
 358                                 thr_keycreate(&clnt_broadcast_key, free);
 359                         mutex_unlock(&tsd_lock);
 360                 }
 361                 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
 362         }
 363         return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
 364             (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
 365             (resultproc_t) rpc_wrap_bcast, "udp");
 366 }
 367
 368 /*
 369  * Create the client des authentication object. Obsoleted by
 370  * authdes_seccreate().
 371  */
 372 AUTH *
 373 authdes_create(char *servername,         /* network name of server */
 374                u_int window,             /* time to live */
 375                struct sockaddr *syncaddr,/* optional hostaddr to sync with */
 376                des_block *ckey)          /* optional conversation key to use */
 377 {
 378         AUTH *dummy;
 379         AUTH *nauth;
 380         char hostname[NI_MAXHOST];
 381
 382         if (syncaddr) {
 383                 /*
 384                  * Change addr to hostname, because that is the way
 385                  * new interface takes it.
 386                  */
 387                 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname,
 388                     sizeof hostname, NULL, 0, 0) != 0)
 389                         goto fallback;
 390
 391                 nauth = authdes_seccreate(servername, window, hostname, ckey);
 392                 return (nauth);
 393         }
 394 fallback:
 395         dummy = authdes_seccreate(servername, window, NULL, ckey);
 396         return (dummy);
 397 }
 398
 399 /*
 400  * Create a client handle for a unix connection. Obsoleted by clnt_vc_create()
 401  */
 402 CLIENT *
 403 clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp,
 404                 u_int sendsz, u_int recvsz)
 405 {
 406         struct netbuf *svcaddr;
 407         struct netconfig *nconf;
 408         CLIENT *cl;
 409         int len;
 410
 411         cl = NULL;
 412         nconf = NULL;
 413         svcaddr = NULL;
 414         if ((raddr->sun_len == 0) ||
 415            ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) ||
 416            ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) {
 417                 if (svcaddr != NULL)
 418                         free(svcaddr);
 419                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 420                 rpc_createerr.cf_error.re_errno = errno;
 421                 return(cl);
 422         }
 423         if (*sockp < 0) {
 424                 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0);
 425                 len = raddr->sun_len = SUN_LEN(raddr);
 426                 if ((*sockp < 0) || (_connect(*sockp,
 427                     (struct sockaddr *)raddr, len) < 0)) {
 428                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 429                         rpc_createerr.cf_error.re_errno = errno;
 430                         if (*sockp != -1)
 431                                 _close(*sockp);
 432                         goto done;
 433                 }
 434         }
 435         svcaddr->buf = raddr;
 436         svcaddr->len = raddr->sun_len;
 437         svcaddr->maxlen = sizeof (struct sockaddr_un);
 438         cl = clnt_vc_create(*sockp, svcaddr, prog,
 439             vers, sendsz, recvsz);
 440 done:
 441         free(svcaddr->buf);
 442         free(svcaddr);
 443         return(cl);
 444 }
 445
 446 /*
 447  * Creates, registers, and returns a (rpc) unix based transporter.
 448  * Obsoleted by svc_vc_create().
 449  */
 450 SVCXPRT *
 451 svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path)
 452 {
 453         struct netconfig *nconf;
 454         void *localhandle;
 455         struct sockaddr_un sun;
 456         struct sockaddr *sa;
 457         struct t_bind taddr;
 458         SVCXPRT *xprt;
 459         int addrlen;
 460
 461         xprt = (SVCXPRT *)NULL;
 462         localhandle = setnetconfig();
 463         while ((nconf = getnetconfig(localhandle)) != NULL) {
 464                 if (nconf->nc_protofmly != NULL &&
 465                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 466                         break;
 467         }
 468         if (nconf == NULL)
 469                 return(xprt);
 470
 471         if ((sock = __rpc_nconf2fd(nconf)) < 0)
 472                 goto done;
 473
 474         memset(&sun, 0, sizeof sun);
 475         sun.sun_family = AF_LOCAL;
 476         if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
 477             sizeof(sun.sun_path))
 478                 goto done;
 479         sun.sun_len = SUN_LEN(&sun);
 480         addrlen = sizeof (struct sockaddr_un);
 481         sa = (struct sockaddr *)&sun;
 482
 483         if (_bind(sock, sa, addrlen) < 0)
 484                 goto done;
 485
 486         taddr.addr.len = taddr.addr.maxlen = addrlen;
 487         taddr.addr.buf = malloc(addrlen);
 488         if (taddr.addr.buf == NULL)
 489                 goto done;
 490         memcpy(taddr.addr.buf, sa, addrlen);
 491
 492         if (nconf->nc_semantics != NC_TPI_CLTS) {
 493                 if (_listen(sock, SOMAXCONN) < 0) {
 494                         free(taddr.addr.buf);
 495                         goto done;
 496                 }
 497         }
 498
 499         xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize);
 500
 501 done:
 502         endnetconfig(localhandle);
 503         return(xprt);
 504 }
 505
 506 /*
 507  * Like svunix_create(), except the routine takes any *open* UNIX file
 508  * descriptor as its first input. Obsoleted by svc_fd_create();
 509  */
 510 SVCXPRT *
 511 svcunixfd_create(int fd, u_int sendsize, u_int recvsize)
 512 {
 513         return (svc_fd_create(fd, sendsize, recvsize));
 514 }
 515
 516 #endif /* PORTMAP */