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  */
  32
  33 /*
  34  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  35  * In addition, portions of such source code were derived from Berkeley
  36  * 4.3 BSD under license from the Regents of the University of
  37  * California.
  38  */
  39
  40 #ifdef PORTMAP
  41 /*
  42  * rpc_soc.c
  43  *
  44  * The backward compatibility routines for the earlier implementation
  45  * of RPC, where the only transports supported were tcp/ip and udp/ip.
  46  * Based on berkeley socket abstraction, now implemented on the top
  47  * of TLI/Streams
  48  */
  49
  50 #include "namespace.h"
  51 #include "reentrant.h"
  52 #include <sys/types.h>
  53 #include <sys/socket.h>
  54 #include <stdio.h>
  55 #include <rpc/rpc.h>
  56 #include <rpc/pmap_clnt.h>
  57 #include <rpc/pmap_prot.h>
  58 #include <rpc/nettype.h>
  59 #include <syslog.h>
  60 #include <netinet/in.h>
  61 #include <netdb.h>
  62 #include <errno.h>
  63 #include <syslog.h>
  64 #include <stdlib.h>
  65 #include <string.h>
  66 #include <unistd.h>
  67 #include "un-namespace.h"
  68
  69 #include "rpc_com.h"
  70 #include "mt_misc.h"
  71
  72 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
  73     int *, u_int, u_int, char *);
  74 static SVCXPRT *svc_com_create(int, u_int, u_int, char *);
  75 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
  76
  77 /* XXX */
  78 #define IN4_LOCALHOST_STRING    "127.0.0.1"
  79 #define IN6_LOCALHOST_STRING    "::1"
  80
  81 /*
  82  * A common clnt create routine
  83  */
  84 static CLIENT *
  85 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
  86                 int *sockp, u_int sendsz, u_int recvsz, char *tp)
  87 {
  88         CLIENT *cl;
  89         int madefd = FALSE;
  90         int fd = *sockp;
  91         struct netconfig *nconf;
  92         struct netbuf bindaddr;
  93
  94         mutex_lock(&rpcsoc_lock);
  95         if ((nconf = __rpc_getconfip(tp)) == NULL) {
  96                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
  97                 mutex_unlock(&rpcsoc_lock);
  98                 return (NULL);
  99         }
 100         if (fd == RPC_ANYSOCK) {
 101                 fd = __rpc_nconf2fd(nconf);
 102                 if (fd == -1)
 103                         goto syserror;
 104                 madefd = TRUE;
 105         }
 106
 107         if (raddr->sin_port == 0) {
 108                 u_int proto;
 109                 u_short sport;
 110
 111                 mutex_unlock(&rpcsoc_lock);     /* pmap_getport is recursive */
 112                 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
 113                 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
 114                     proto);
 115                 if (sport == 0) {
 116                         goto err;
 117                 }
 118                 raddr->sin_port = htons(sport);
 119                 mutex_lock(&rpcsoc_lock);       /* pmap_getport is recursive */
 120         }
 121
 122         /* Transform sockaddr_in to netbuf */
 123         bindaddr.maxlen = bindaddr.len =  sizeof (struct sockaddr_in);
 124         bindaddr.buf = raddr;
 125
 126         bindresvport(fd, NULL);
 127         cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
 128                                 sendsz, recvsz);
 129         if (cl) {
 130                 if (madefd == TRUE) {
 131                         /*
 132                          * The fd should be closed while destroying the handle.
 133                          */
 134                         CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
 135                         *sockp = fd;
 136                 }
 137                 freenetconfigent(nconf);
 138                 mutex_unlock(&rpcsoc_lock);
 139                 return (cl);
 140         }
 141         goto err;
 142
 143 syserror:
 144         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 145         rpc_createerr.cf_error.re_errno = errno;
 146
 147 err:    if (madefd == TRUE)
 148                 _close(fd);
 149         freenetconfigent(nconf);
 150         mutex_unlock(&rpcsoc_lock);
 151         return (NULL);
 152 }
 153
 154 CLIENT *
 155 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers,
 156                   struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
 157 {
 158         CLIENT *cl;
 159
 160         cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 161             sendsz, recvsz, "udp");
 162         if (cl == NULL) {
 163                 return (NULL);
 164         }
 165         CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait);
 166         return (cl);
 167 }
 168
 169 CLIENT *
 170 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
 171                struct timeval wait, int *sockp)
 172 {
 173
 174         return clntudp_bufcreate(raddr, program, version, wait, sockp,
 175                                         UDPMSGSIZE, UDPMSGSIZE);
 176 }
 177
 178 CLIENT *
 179 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
 180                u_int sendsz, u_int recvsz)
 181 {
 182
 183         return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 184             sendsz, recvsz, "tcp");
 185 }
 186
 187 CLIENT *
 188 clntraw_create(u_long prog, u_long vers)
 189 {
 190
 191         return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
 192 }
 193
 194 /*
 195  * A common server create routine
 196  */
 197 static SVCXPRT *
 198 svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid)
 199 {
 200         struct netconfig *nconf;
 201         SVCXPRT *svc;
 202         int madefd = FALSE;
 203         int port;
 204         struct sockaddr_in sin;
 205
 206         if ((nconf = __rpc_getconfip(netid)) == NULL) {
 207                 syslog(LOG_ERR, "Could not get %s transport", netid);
 208                 return (NULL);
 209         }
 210         if (fd == RPC_ANYSOCK) {
 211                 fd = __rpc_nconf2fd(nconf);
 212                 if (fd == -1) {
 213                         freenetconfigent(nconf);
 214                         syslog(LOG_ERR,
 215                         "svc%s_create: could not open connection", netid);
 216                         return (NULL);
 217                 }
 218                 madefd = TRUE;
 219         }
 220
 221         memset(&sin, 0, sizeof sin);
 222         sin.sin_family = AF_INET;
 223         bindresvport(fd, &sin);
 224         _listen(fd, SOMAXCONN);
 225         svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
 226         freenetconfigent(nconf);
 227         if (svc == NULL) {
 228                 if (madefd)
 229                         _close(fd);
 230                 return (NULL);
 231         }
 232         port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
 233         svc->xp_port = ntohs(port);
 234         return (svc);
 235 }
 236
 237 SVCXPRT *
 238 svctcp_create(int fd, u_int sendsize, u_int recvsize)
 239 {
 240
 241         return svc_com_create(fd, sendsize, recvsize, "tcp");
 242 }
 243
 244 SVCXPRT *
 245 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
 246 {
 247
 248         return svc_com_create(fd, sendsz, recvsz, "udp");
 249 }
 250
 251 SVCXPRT *
 252 svcfd_create(int fd, u_int sendsize, u_int recvsize)
 253 {
 254
 255         return svc_fd_create(fd, sendsize, recvsize);
 256 }
 257
 258
 259 SVCXPRT *
 260 svcudp_create(int fd)
 261 {
 262
 263         return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
 264 }
 265
 266 SVCXPRT *
 267 svcraw_create(void)
 268 {
 269
 270         return svc_raw_create();
 271 }
 272
 273 int
 274 get_myaddress(struct sockaddr_in *addr)
 275 {
 276
 277         memset((void *) addr, 0, sizeof(*addr));
 278         addr->sin_family = AF_INET;
 279         addr->sin_port = htons(PMAPPORT);
 280         addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 281         return (0);
 282 }
 283
 284 /*
 285  * For connectionless "udp" transport. Obsoleted by rpc_call().
 286  */
 287 int
 288 callrpc(const char *host, int prognum, int versnum, int procnum,
 289         xdrproc_t inproc, void *in, xdrproc_t outproc, void *out)
 290 {
 291
 292         return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
 293             (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
 294 }
 295
 296 /*
 297  * For connectionless kind of transport. Obsoleted by rpc_reg()
 298  */
 299 int
 300 registerrpc(int prognum, int versnum, int procnum, char *(*progname)(char *),
 301             xdrproc_t inproc, xdrproc_t outproc)
 302 {
 303
 304         return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
 305             (rpcproc_t)procnum, progname, inproc, outproc, "udp");
 306 }
 307
 308 /*
 309  * All the following clnt_broadcast stuff is convulated; it supports
 310  * the earlier calling style of the callback function
 311  */
 312 static thread_key_t     clnt_broadcast_key;
 313 static resultproc_t     clnt_broadcast_result_main;
 314
 315 /*
 316  * Need to translate the netbuf address into sockaddr_in address.
 317  * Dont care about netid here.
 318  */
 319 /* ARGSUSED */
 320 static bool_t
 321 rpc_wrap_bcast(char *resultp,           /* results of the call */
 322                struct netbuf *addr,     /* address of the guy who responded */
 323                struct netconfig *nconf) /* Netconf of the transport */
 324 {
 325         resultproc_t clnt_broadcast_result;
 326
 327         if (strcmp(nconf->nc_netid, "udp"))
 328                 return (FALSE);
 329         if (thr_main())
 330                 clnt_broadcast_result = clnt_broadcast_result_main;
 331         else
 332                 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key);
 333         return (*clnt_broadcast_result)(resultp,
 334                                 (struct sockaddr_in *)addr->buf);
 335 }
 336
 337 /*
 338  * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
 339  */
 340 enum clnt_stat
 341 clnt_broadcast(u_long           prog,           /* program number */
 342                u_long           vers,           /* version number */
 343                u_long           proc,           /* procedure number */
 344                xdrproc_t        xargs,          /* xdr routine for args */
 345                void            *argsp,          /* pointer to args */
 346                xdrproc_t        xresults,       /* xdr routine for results */
 347                void            *resultsp,       /* pointer to results */
 348                resultproc_t     eachresult)     /* call with each result obtained */
 349 {
 350
 351         if (thr_main())
 352                 clnt_broadcast_result_main = eachresult;
 353         else {
 354                 if (clnt_broadcast_key == 0) {
 355                         mutex_lock(&tsd_lock);
 356                         if (clnt_broadcast_key == 0)
 357                                 thr_keycreate(&clnt_broadcast_key, free);
 358                         mutex_unlock(&tsd_lock);
 359                 }
 360                 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
 361         }
 362         return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
 363             (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
 364             (resultproc_t) rpc_wrap_bcast, "udp");
 365 }
 366
 367 /*
 368  * Create the client des authentication object. Obsoleted by
 369  * authdes_seccreate().
 370  */
 371 AUTH *
 372 authdes_create(char *servername,         /* network name of server */
 373                u_int window,             /* time to live */
 374                struct sockaddr *syncaddr,/* optional hostaddr to sync with */
 375                des_block *ckey)          /* optional conversation key to use */
 376 {
 377         AUTH *dummy;
 378         AUTH *nauth;
 379         char hostname[NI_MAXHOST];
 380
 381         if (syncaddr) {
 382                 /*
 383                  * Change addr to hostname, because that is the way
 384                  * new interface takes it.
 385                  */
 386                 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname,
 387                     sizeof hostname, NULL, 0, 0) != 0)
 388                         goto fallback;
 389
 390                 nauth = authdes_seccreate(servername, window, hostname, ckey);
 391                 return (nauth);
 392         }
 393 fallback:
 394         dummy = authdes_seccreate(servername, window, NULL, ckey);
 395         return (dummy);
 396 }
 397
 398 /*
 399  * Create a client handle for a unix connection. Obsoleted by clnt_vc_create()
 400  */
 401 CLIENT *
 402 clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp,
 403                 u_int sendsz, u_int recvsz)
 404 {
 405         struct netbuf *svcaddr;
 406         struct netconfig *nconf;
 407         CLIENT *cl;
 408         int len;
 409
 410         cl = NULL;
 411         nconf = NULL;
 412         svcaddr = NULL;
 413         if ((raddr->sun_len == 0) ||
 414            ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) ||
 415            ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) {
 416                 if (svcaddr != NULL)
 417                         free(svcaddr);
 418                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 419                 rpc_createerr.cf_error.re_errno = errno;
 420                 return(cl);
 421         }
 422         if (*sockp < 0) {
 423                 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0);
 424                 len = raddr->sun_len = SUN_LEN(raddr);
 425                 if ((*sockp < 0) || (_connect(*sockp,
 426                     (struct sockaddr *)raddr, len) < 0)) {
 427                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 428                         rpc_createerr.cf_error.re_errno = errno;
 429                         if (*sockp != -1)
 430                                 _close(*sockp);
 431                         goto done;
 432                 }
 433         }
 434         svcaddr->buf = raddr;
 435         svcaddr->len = raddr->sun_len;
 436         svcaddr->maxlen = sizeof (struct sockaddr_un);
 437         cl = clnt_vc_create(*sockp, svcaddr, prog,
 438             vers, sendsz, recvsz);
 439 done:
 440         free(svcaddr->buf);
 441         free(svcaddr);
 442         return(cl);
 443 }
 444
 445 /*
 446  * Creates, registers, and returns a (rpc) unix based transporter.
 447  * Obsoleted by svc_vc_create().
 448  */
 449 SVCXPRT *
 450 svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path)
 451 {
 452         struct netconfig *nconf;
 453         void *localhandle;
 454         struct sockaddr_un sun;
 455         struct sockaddr *sa;
 456         struct t_bind taddr;
 457         SVCXPRT *xprt;
 458         int addrlen;
 459
 460         xprt = NULL;
 461         localhandle = setnetconfig();
 462         while ((nconf = getnetconfig(localhandle)) != NULL) {
 463                 if (nconf->nc_protofmly != NULL &&
 464                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 465                         break;
 466         }
 467         if (nconf == NULL)
 468                 return(xprt);
 469
 470         if ((sock = __rpc_nconf2fd(nconf)) < 0)
 471                 goto done;
 472
 473         memset(&sun, 0, sizeof sun);
 474         sun.sun_family = AF_LOCAL;
 475         if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
 476             sizeof(sun.sun_path))
 477                 goto done;
 478         sun.sun_len = SUN_LEN(&sun);
 479         addrlen = sizeof (struct sockaddr_un);
 480         sa = (struct sockaddr *)&sun;
 481
 482         if (_bind(sock, sa, addrlen) < 0)
 483                 goto done;
 484
 485         taddr.addr.len = taddr.addr.maxlen = addrlen;
 486         taddr.addr.buf = malloc(addrlen);
 487         if (taddr.addr.buf == NULL)
 488                 goto done;
 489         memcpy(taddr.addr.buf, sa, addrlen);
 490
 491         if (nconf->nc_semantics != NC_TPI_CLTS) {
 492                 if (_listen(sock, SOMAXCONN) < 0) {
 493                         free(taddr.addr.buf);
 494                         goto done;
 495                 }
 496         }
 497
 498         xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize);
 499
 500 done:
 501         endnetconfig(localhandle);
 502         return(xprt);
 503 }
 504
 505 /*
 506  * Like svunix_create(), except the routine takes any *open* UNIX file
 507  * descriptor as its first input. Obsoleted by svc_fd_create();
 508  */
 509 SVCXPRT *
 510 svcunixfd_create(int fd, u_int sendsize, u_int recvsize)
 511 {
 512         return (svc_fd_create(fd, sendsize, recvsize));
 513 }
 514
 515 #endif /* PORTMAP */