lib/libc/rpc/rpc_soc.c

   1 /*-
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  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 <stdlib.h>
  64 #include <string.h>
  65 #include <unistd.h>
  66 #include "un-namespace.h"
  67
  68 #include "rpc_com.h"
  69 #include "mt_misc.h"
  70
  71 static CLIENT *clnt_com_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
  72     int *, u_int, u_int, char *);
  73 static SVCXPRT *svc_com_create(int, u_int, u_int, char *);
  74 static bool_t rpc_wrap_bcast(char *, struct netbuf *, struct netconfig *);
  75
  76 /* XXX */
  77 #define IN4_LOCALHOST_STRING    "127.0.0.1"
  78 #define IN6_LOCALHOST_STRING    "::1"
  79
  80 /*
  81  * A common clnt create routine
  82  */
  83 static CLIENT *
  84 clnt_com_create(struct sockaddr_in *raddr, rpcprog_t prog, rpcvers_t vers,
  85                 int *sockp, u_int sendsz, u_int recvsz, char *tp)
  86 {
  87         CLIENT *cl;
  88         int madefd = FALSE;
  89         int fd = *sockp;
  90         struct netconfig *nconf;
  91         struct netbuf bindaddr;
  92
  93         mutex_lock(&rpcsoc_lock);
  94         if ((nconf = __rpc_getconfip(tp)) == NULL) {
  95                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
  96                 mutex_unlock(&rpcsoc_lock);
  97                 return (NULL);
  98         }
  99         if (fd == RPC_ANYSOCK) {
 100                 fd = __rpc_nconf2fd(nconf);
 101                 if (fd == -1)
 102                         goto syserror;
 103                 madefd = TRUE;
 104         }
 105
 106         if (raddr->sin_port == 0) {
 107                 u_int proto;
 108                 u_short sport;
 109
 110                 mutex_unlock(&rpcsoc_lock);     /* pmap_getport is recursive */
 111                 proto = strcmp(tp, "udp") == 0 ? IPPROTO_UDP : IPPROTO_TCP;
 112                 sport = pmap_getport(raddr, (u_long)prog, (u_long)vers,
 113                     proto);
 114                 if (sport == 0) {
 115                         goto err;
 116                 }
 117                 raddr->sin_port = htons(sport);
 118                 mutex_lock(&rpcsoc_lock);       /* pmap_getport is recursive */
 119         }
 120
 121         /* Transform sockaddr_in to netbuf */
 122         bindaddr.maxlen = bindaddr.len =  sizeof (struct sockaddr_in);
 123         bindaddr.buf = raddr;
 124
 125         bindresvport(fd, NULL);
 126         cl = clnt_tli_create(fd, nconf, &bindaddr, prog, vers,
 127                                 sendsz, recvsz);
 128         if (cl) {
 129                 if (madefd == TRUE) {
 130                         /*
 131                          * The fd should be closed while destroying the handle.
 132                          */
 133                         CLNT_CONTROL(cl, CLSET_FD_CLOSE, NULL);
 134                         *sockp = fd;
 135                 }
 136                 freenetconfigent(nconf);
 137                 mutex_unlock(&rpcsoc_lock);
 138                 return (cl);
 139         }
 140         goto err;
 141
 142 syserror:
 143         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 144         rpc_createerr.cf_error.re_errno = errno;
 145
 146 err:    if (madefd == TRUE)
 147                 _close(fd);
 148         freenetconfigent(nconf);
 149         mutex_unlock(&rpcsoc_lock);
 150         return (NULL);
 151 }
 152
 153 CLIENT *
 154 clntudp_bufcreate(struct sockaddr_in *raddr, u_long prog, u_long vers,
 155                   struct timeval wait, int *sockp, u_int sendsz, u_int recvsz)
 156 {
 157         CLIENT *cl;
 158
 159         cl = clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 160             sendsz, recvsz, "udp");
 161         if (cl == NULL) {
 162                 return (NULL);
 163         }
 164         CLNT_CONTROL(cl, CLSET_RETRY_TIMEOUT, &wait);
 165         return (cl);
 166 }
 167
 168 CLIENT *
 169 clntudp_create(struct sockaddr_in *raddr, u_long program, u_long version,
 170                struct timeval wait, int *sockp)
 171 {
 172
 173         return clntudp_bufcreate(raddr, program, version, wait, sockp,
 174                                         UDPMSGSIZE, UDPMSGSIZE);
 175 }
 176
 177 CLIENT *
 178 clnttcp_create(struct sockaddr_in *raddr, u_long prog, u_long vers, int *sockp,
 179                u_int sendsz, u_int recvsz)
 180 {
 181
 182         return clnt_com_create(raddr, (rpcprog_t)prog, (rpcvers_t)vers, sockp,
 183             sendsz, recvsz, "tcp");
 184 }
 185
 186 CLIENT *
 187 clntraw_create(u_long prog, u_long vers)
 188 {
 189
 190         return clnt_raw_create((rpcprog_t)prog, (rpcvers_t)vers);
 191 }
 192
 193 /*
 194  * A common server create routine
 195  */
 196 static SVCXPRT *
 197 svc_com_create(int fd, u_int sendsize, u_int recvsize, char *netid)
 198 {
 199         struct netconfig *nconf;
 200         SVCXPRT *svc;
 201         int madefd = FALSE;
 202         int port;
 203         struct sockaddr_in sin;
 204
 205         if ((nconf = __rpc_getconfip(netid)) == NULL) {
 206                 syslog(LOG_ERR, "Could not get %s transport", netid);
 207                 return (NULL);
 208         }
 209         if (fd == RPC_ANYSOCK) {
 210                 fd = __rpc_nconf2fd(nconf);
 211                 if (fd == -1) {
 212                         freenetconfigent(nconf);
 213                         syslog(LOG_ERR,
 214                         "svc%s_create: could not open connection", netid);
 215                         return (NULL);
 216                 }
 217                 madefd = TRUE;
 218         }
 219
 220         memset(&sin, 0, sizeof sin);
 221         sin.sin_family = AF_INET;
 222         bindresvport(fd, &sin);
 223         _listen(fd, SOMAXCONN);
 224         svc = svc_tli_create(fd, nconf, NULL, sendsize, recvsize);
 225         freenetconfigent(nconf);
 226         if (svc == NULL) {
 227                 if (madefd)
 228                         _close(fd);
 229                 return (NULL);
 230         }
 231         port = (((struct sockaddr_in *)svc->xp_ltaddr.buf)->sin_port);
 232         svc->xp_port = ntohs(port);
 233         return (svc);
 234 }
 235
 236 SVCXPRT *
 237 svctcp_create(int fd, u_int sendsize, u_int recvsize)
 238 {
 239
 240         return svc_com_create(fd, sendsize, recvsize, "tcp");
 241 }
 242
 243 SVCXPRT *
 244 svcudp_bufcreate(int fd, u_int sendsz, u_int recvsz)
 245 {
 246
 247         return svc_com_create(fd, sendsz, recvsz, "udp");
 248 }
 249
 250 SVCXPRT *
 251 svcfd_create(int fd, u_int sendsize, u_int recvsize)
 252 {
 253
 254         return svc_fd_create(fd, sendsize, recvsize);
 255 }
 256
 257
 258 SVCXPRT *
 259 svcudp_create(int fd)
 260 {
 261
 262         return svc_com_create(fd, UDPMSGSIZE, UDPMSGSIZE, "udp");
 263 }
 264
 265 SVCXPRT *
 266 svcraw_create(void)
 267 {
 268
 269         return svc_raw_create();
 270 }
 271
 272 int
 273 get_myaddress(struct sockaddr_in *addr)
 274 {
 275
 276         memset((void *) addr, 0, sizeof(*addr));
 277         addr->sin_family = AF_INET;
 278         addr->sin_port = htons(PMAPPORT);
 279         addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 280         return (0);
 281 }
 282
 283 /*
 284  * For connectionless "udp" transport. Obsoleted by rpc_call().
 285  */
 286 int
 287 callrpc(const char *host, int prognum, int versnum, int procnum,
 288         xdrproc_t inproc, void *in, xdrproc_t outproc, void *out)
 289 {
 290
 291         return (int)rpc_call(host, (rpcprog_t)prognum, (rpcvers_t)versnum,
 292             (rpcproc_t)procnum, inproc, in, outproc, out, "udp");
 293 }
 294
 295 /*
 296  * For connectionless kind of transport. Obsoleted by rpc_reg()
 297  */
 298 int
 299 registerrpc(int prognum, int versnum, int procnum, char *(*progname)(char *),
 300             xdrproc_t inproc, xdrproc_t outproc)
 301 {
 302
 303         return rpc_reg((rpcprog_t)prognum, (rpcvers_t)versnum,
 304             (rpcproc_t)procnum, progname, inproc, outproc, "udp");
 305 }
 306
 307 /*
 308  * All the following clnt_broadcast stuff is convulated; it supports
 309  * the earlier calling style of the callback function
 310  */
 311 static thread_key_t     clnt_broadcast_key;
 312 static resultproc_t     clnt_broadcast_result_main;
 313
 314 /*
 315  * Need to translate the netbuf address into sockaddr_in address.
 316  * Dont care about netid here.
 317  */
 318 /* ARGSUSED */
 319 static bool_t
 320 rpc_wrap_bcast(char *resultp,           /* results of the call */
 321                struct netbuf *addr,     /* address of the guy who responded */
 322                struct netconfig *nconf) /* Netconf of the transport */
 323 {
 324         resultproc_t clnt_broadcast_result;
 325
 326         if (strcmp(nconf->nc_netid, "udp"))
 327                 return (FALSE);
 328         if (thr_main())
 329                 clnt_broadcast_result = clnt_broadcast_result_main;
 330         else
 331                 clnt_broadcast_result = (resultproc_t)thr_getspecific(clnt_broadcast_key);
 332         return (*clnt_broadcast_result)(resultp,
 333                                 (struct sockaddr_in *)addr->buf);
 334 }
 335
 336 /*
 337  * Broadcasts on UDP transport. Obsoleted by rpc_broadcast().
 338  */
 339 enum clnt_stat
 340 clnt_broadcast(u_long           prog,           /* program number */
 341                u_long           vers,           /* version number */
 342                u_long           proc,           /* procedure number */
 343                xdrproc_t        xargs,          /* xdr routine for args */
 344                void            *argsp,          /* pointer to args */
 345                xdrproc_t        xresults,       /* xdr routine for results */
 346                void            *resultsp,       /* pointer to results */
 347                resultproc_t     eachresult)     /* call with each result obtained */
 348 {
 349
 350         if (thr_main())
 351                 clnt_broadcast_result_main = eachresult;
 352         else {
 353                 if (clnt_broadcast_key == 0) {
 354                         mutex_lock(&tsd_lock);
 355                         if (clnt_broadcast_key == 0)
 356                                 thr_keycreate(&clnt_broadcast_key, free);
 357                         mutex_unlock(&tsd_lock);
 358                 }
 359                 thr_setspecific(clnt_broadcast_key, (void *) eachresult);
 360         }
 361         return rpc_broadcast((rpcprog_t)prog, (rpcvers_t)vers,
 362             (rpcproc_t)proc, xargs, argsp, xresults, resultsp,
 363             (resultproc_t) rpc_wrap_bcast, "udp");
 364 }
 365
 366 /*
 367  * Create the client des authentication object. Obsoleted by
 368  * authdes_seccreate().
 369  */
 370 AUTH *
 371 authdes_create(char *servername,         /* network name of server */
 372                u_int window,             /* time to live */
 373                struct sockaddr *syncaddr,/* optional hostaddr to sync with */
 374                des_block *ckey)          /* optional conversation key to use */
 375 {
 376         AUTH *dummy;
 377         AUTH *nauth;
 378         char hostname[NI_MAXHOST];
 379
 380         if (syncaddr) {
 381                 /*
 382                  * Change addr to hostname, because that is the way
 383                  * new interface takes it.
 384                  */
 385                 if (getnameinfo(syncaddr, syncaddr->sa_len, hostname,
 386                     sizeof hostname, NULL, 0, 0) != 0)
 387                         goto fallback;
 388
 389                 nauth = authdes_seccreate(servername, window, hostname, ckey);
 390                 return (nauth);
 391         }
 392 fallback:
 393         dummy = authdes_seccreate(servername, window, NULL, ckey);
 394         return (dummy);
 395 }
 396
 397 /*
 398  * Create a client handle for a unix connection. Obsoleted by clnt_vc_create()
 399  */
 400 CLIENT *
 401 clntunix_create(struct sockaddr_un *raddr, u_long prog, u_long vers, int *sockp,
 402                 u_int sendsz, u_int recvsz)
 403 {
 404         struct netbuf *svcaddr;
 405         CLIENT *cl;
 406         int len;
 407
 408         cl = NULL;
 409         svcaddr = NULL;
 410         if ((raddr->sun_len == 0) ||
 411            ((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) ||
 412            ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) {
 413                 if (svcaddr != NULL)
 414                         free(svcaddr);
 415                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 416                 rpc_createerr.cf_error.re_errno = errno;
 417                 return(cl);
 418         }
 419         if (*sockp < 0) {
 420                 *sockp = _socket(AF_LOCAL, SOCK_STREAM, 0);
 421                 len = raddr->sun_len = SUN_LEN(raddr);
 422                 if ((*sockp < 0) || (_connect(*sockp,
 423                     (struct sockaddr *)raddr, len) < 0)) {
 424                         rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 425                         rpc_createerr.cf_error.re_errno = errno;
 426                         if (*sockp != -1)
 427                                 _close(*sockp);
 428                         goto done;
 429                 }
 430         }
 431         svcaddr->buf = raddr;
 432         svcaddr->len = raddr->sun_len;
 433         svcaddr->maxlen = sizeof (struct sockaddr_un);
 434         cl = clnt_vc_create(*sockp, svcaddr, prog,
 435             vers, sendsz, recvsz);
 436 done:
 437         free(svcaddr->buf);
 438         free(svcaddr);
 439         return(cl);
 440 }
 441
 442 /*
 443  * Creates, registers, and returns a (rpc) unix based transporter.
 444  * Obsoleted by svc_vc_create().
 445  */
 446 SVCXPRT *
 447 svcunix_create(int sock, u_int sendsize, u_int recvsize, char *path)
 448 {
 449         struct netconfig *nconf;
 450         void *localhandle;
 451         struct sockaddr_un sun;
 452         struct sockaddr *sa;
 453         struct t_bind taddr;
 454         SVCXPRT *xprt;
 455         int addrlen;
 456
 457         xprt = NULL;
 458         localhandle = setnetconfig();
 459         while ((nconf = getnetconfig(localhandle)) != NULL) {
 460                 if (nconf->nc_protofmly != NULL &&
 461                     strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0)
 462                         break;
 463         }
 464         if (nconf == NULL)
 465                 return(xprt);
 466
 467         if ((sock = __rpc_nconf2fd(nconf)) < 0)
 468                 goto done;
 469
 470         memset(&sun, 0, sizeof sun);
 471         sun.sun_family = AF_LOCAL;
 472         if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
 473             sizeof(sun.sun_path))
 474                 goto done;
 475         sun.sun_len = SUN_LEN(&sun);
 476         addrlen = sizeof (struct sockaddr_un);
 477         sa = (struct sockaddr *)&sun;
 478
 479         if (_bind(sock, sa, addrlen) < 0)
 480                 goto done;
 481
 482         taddr.addr.len = taddr.addr.maxlen = addrlen;
 483         taddr.addr.buf = malloc(addrlen);
 484         if (taddr.addr.buf == NULL)
 485                 goto done;
 486         memcpy(taddr.addr.buf, sa, addrlen);
 487
 488         if (nconf->nc_semantics != NC_TPI_CLTS) {
 489                 if (_listen(sock, SOMAXCONN) < 0) {
 490                         free(taddr.addr.buf);
 491                         goto done;
 492                 }
 493         }
 494
 495         xprt = (SVCXPRT *)svc_tli_create(sock, nconf, &taddr, sendsize, recvsize);
 496
 497 done:
 498         endnetconfig(localhandle);
 499         return(xprt);
 500 }
 501
 502 /*
 503  * Like svunix_create(), except the routine takes any *open* UNIX file
 504  * descriptor as its first input. Obsoleted by svc_fd_create();
 505  */
 506 SVCXPRT *
 507 svcunixfd_create(int fd, u_int sendsize, u_int recvsize)
 508 {
 509         return (svc_fd_create(fd, sendsize, recvsize));
 510 }
 511
 512 #endif /* PORTMAP */