lib/libc/rpc/rpc_generic.c

   1 /*      $NetBSD: rpc_generic.c,v 1.22 2006/06/22 19:35:34 christos 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  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  33  */
  34
  35 /* #pragma ident        "@(#)rpc_generic.c      1.17    94/04/24 SMI" */
  36
  37 /*
  38  * rpc_generic.c, Miscl routines for RPC.
  39  *
  40  */
  41
  42 #include <sys/cdefs.h>
  43 #if defined(LIBC_SCCS) && !defined(lint)
  44 __RCSID("$NetBSD: rpc_generic.c,v 1.22 2006/06/22 19:35:34 christos Exp $");
  45 #endif
  46
  47 #include "namespace.h"
  48 #include "reentrant.h"
  49 #include <sys/types.h>
  50 #include <sys/param.h>
  51 #include <sys/socket.h>
  52 #include <sys/un.h>
  53 #include <sys/resource.h>
  54 #include <netinet/in.h>
  55 #include <netinet/tcp.h>
  56 #include <arpa/inet.h>
  57 #include <rpc/rpc.h>
  58 #include <assert.h>
  59 #include <ctype.h>
  60 #include <stdio.h>
  61 #include <netdb.h>
  62 #include <netconfig.h>
  63 #include <malloc.h>
  64 #include <string.h>
  65 #include <syslog.h>
  66 #include <rpc/nettype.h>
  67 #include "rpc_internal.h"
  68
  69 #ifdef __weak_alias
  70 __weak_alias(taddr2uaddr,_taddr2uaddr)
  71 __weak_alias(uaddr2taddr,_uaddr2taddr)
  72 #endif
  73
  74 struct handle {
  75         NCONF_HANDLE *nhandle;
  76         int nflag;              /* Whether NETPATH or NETCONFIG */
  77         int nettype;
  78 };
  79
  80 static const struct _rpcnettype {
  81         const char *name;
  82         const int type;
  83 } _rpctypelist[] = {
  84         { "netpath", _RPC_NETPATH },
  85         { "visible", _RPC_VISIBLE },
  86         { "circuit_v", _RPC_CIRCUIT_V },
  87         { "datagram_v", _RPC_DATAGRAM_V },
  88         { "circuit_n", _RPC_CIRCUIT_N },
  89         { "datagram_n", _RPC_DATAGRAM_N },
  90         { "tcp", _RPC_TCP },
  91         { "udp", _RPC_UDP },
  92         { 0, _RPC_NONE }
  93 };
  94
  95 struct netid_af {
  96         const char      *netid;
  97         int             af;
  98         int             protocol;
  99 };
 100
 101 static const struct netid_af na_cvt[] = {
 102         { "udp",  AF_INET,  IPPROTO_UDP },
 103         { "tcp",  AF_INET,  IPPROTO_TCP },
 104 #ifdef INET6
 105         { "udp6", AF_INET6, IPPROTO_UDP },
 106         { "tcp6", AF_INET6, IPPROTO_TCP },
 107 #endif
 108         { "local", AF_LOCAL, 0 }
 109 };
 110
 111 #if 0
 112 static char *strlocase __P((char *));
 113 #endif
 114 static int getnettype __P((const char *));
 115
 116 /*
 117  * Cache the result of getrlimit(), so we don't have to do an
 118  * expensive call every time.
 119  */
 120 int
 121 __rpc_dtbsize()
 122 {
 123         static int tbsize;
 124         struct rlimit rl;
 125
 126         if (tbsize) {
 127                 return (tbsize);
 128         }
 129         if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
 130                 return (tbsize = (int)rl.rlim_max);
 131         }
 132         /*
 133          * Something wrong.  I'll try to save face by returning a
 134          * pessimistic number.
 135          */
 136         return (32);
 137 }
 138
 139
 140 /*
 141  * Find the appropriate buffer size
 142  */
 143 u_int
 144 /*ARGSUSED*/
 145 __rpc_get_t_size(af, proto, size)
 146         int af, proto;
 147         int size;       /* Size requested */
 148 {
 149         int maxsize, defsize;
 150
 151         maxsize = 256 * 1024;   /* XXX */
 152         switch (proto) {
 153         case IPPROTO_TCP:
 154                 defsize = 64 * 1024;    /* XXX */
 155                 break;
 156         case IPPROTO_UDP:
 157                 defsize = UDPMSGSIZE;
 158                 break;
 159         default:
 160                 defsize = RPC_MAXDATASIZE;
 161                 break;
 162         }
 163         if (size == 0)
 164                 return defsize;
 165
 166         /* Check whether the value is within the upper max limit */
 167         return (size > maxsize ? (u_int)maxsize : (u_int)size);
 168 }
 169
 170 /*
 171  * Find the appropriate address buffer size
 172  */
 173 u_int
 174 __rpc_get_a_size(af)
 175         int af;
 176 {
 177         switch (af) {
 178         case AF_INET:
 179                 return sizeof (struct sockaddr_in);
 180 #ifdef INET6
 181         case AF_INET6:
 182                 return sizeof (struct sockaddr_in6);
 183 #endif
 184         case AF_LOCAL:
 185                 return sizeof (struct sockaddr_un);
 186         default:
 187                 break;
 188         }
 189         return ((u_int)RPC_MAXADDRSIZE);
 190 }
 191
 192 #if 0
 193 static char *
 194 strlocase(p)
 195         char *p;
 196 {
 197         char *t = p;
 198
 199         _DIAGASSERT(p != NULL);
 200
 201         for (; *p; p++)
 202                 if (isupper(*p))
 203                         *p = tolower(*p);
 204         return (t);
 205 }
 206 #endif
 207
 208 /*
 209  * Returns the type of the network as defined in <rpc/nettype.h>
 210  * If nettype is NULL, it defaults to NETPATH.
 211  */
 212 static int
 213 getnettype(nettype)
 214         const char *nettype;
 215 {
 216         int i;
 217
 218         if ((nettype == NULL) || (nettype[0] == 0)) {
 219                 return (_RPC_NETPATH);  /* Default */
 220         }
 221
 222 #if 0
 223         nettype = strlocase(nettype);
 224 #endif
 225         for (i = 0; _rpctypelist[i].name; i++)
 226                 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
 227                         return (_rpctypelist[i].type);
 228                 }
 229         return (_rpctypelist[i].type);
 230 }
 231
 232 /*
 233  * For the given nettype (tcp or udp only), return the first structure found.
 234  * This should be freed by calling freenetconfigent()
 235  */
 236
 237 #ifdef _REENTRANT
 238 static thread_key_t tcp_key, udp_key;
 239 static once_t __rpc_getconfigp_once = ONCE_INITIALIZER;
 240
 241 static void
 242 __rpc_getconfigp_setup(void)
 243 {
 244
 245         thr_keycreate(&tcp_key, free);
 246         thr_keycreate(&udp_key, free);
 247 }
 248 #endif
 249
 250 struct netconfig *
 251 __rpc_getconfip(nettype)
 252         const char *nettype;
 253 {
 254         char *netid;
 255         char *netid_tcp = NULL;
 256         char *netid_udp = NULL;
 257         static char *netid_tcp_main;
 258         static char *netid_udp_main;
 259         struct netconfig *dummy;
 260 #ifdef _REENTRANT
 261         extern int __isthreaded;
 262
 263         if (__isthreaded == 0) {
 264                 netid_udp = netid_udp_main;
 265                 netid_tcp = netid_tcp_main;
 266         } else {
 267                 thr_once(&__rpc_getconfigp_once, __rpc_getconfigp_setup);
 268                 netid_tcp = thr_getspecific(tcp_key);
 269                 netid_udp = thr_getspecific(udp_key);
 270         }
 271 #else
 272         netid_udp = netid_udp_main;
 273         netid_tcp = netid_tcp_main;
 274 #endif
 275
 276         _DIAGASSERT(nettype != NULL);
 277
 278         if (!netid_udp && !netid_tcp) {
 279                 struct netconfig *nconf;
 280                 void *confighandle;
 281
 282                 if (!(confighandle = setnetconfig())) {
 283                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 284                         return (NULL);
 285                 }
 286                 while ((nconf = getnetconfig(confighandle)) != NULL) {
 287                         if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
 288                                 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
 289                                         netid_tcp = strdup(nconf->nc_netid);
 290                                         if (netid_tcp == NULL)
 291                                                 return NULL;
 292 #ifdef _REENTRANT
 293                                         if (__isthreaded == 0)
 294                                                 netid_tcp_main = netid_tcp;
 295                                         else
 296                                                 thr_setspecific(tcp_key,
 297                                                         (void *) netid_tcp);
 298 #else
 299                                         netid_tcp_main = netid_tcp;
 300 #endif
 301                                 } else
 302                                 if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
 303                                         netid_udp = strdup(nconf->nc_netid);
 304                                         if (netid_udp == NULL)
 305                                                 return NULL;
 306 #ifdef _REENTRANT
 307                                         if (__isthreaded == 0)
 308                                                 netid_udp_main = netid_udp;
 309                                         else
 310                                                 thr_setspecific(udp_key,
 311                                                         (void *) netid_udp);
 312 #else
 313                                         netid_udp_main = netid_udp;
 314 #endif
 315                                 }
 316                         }
 317                 }
 318                 endnetconfig(confighandle);
 319         }
 320         if (strcmp(nettype, "udp") == 0)
 321                 netid = netid_udp;
 322         else if (strcmp(nettype, "tcp") == 0)
 323                 netid = netid_tcp;
 324         else {
 325                 return (NULL);
 326         }
 327         if ((netid == NULL) || (netid[0] == 0)) {
 328                 return (NULL);
 329         }
 330         dummy = getnetconfigent(netid);
 331         return (dummy);
 332 }
 333
 334 /*
 335  * Returns the type of the nettype, which should then be used with
 336  * __rpc_getconf().
 337  */
 338 void *
 339 __rpc_setconf(nettype)
 340         const char *nettype;
 341 {
 342         struct handle *handle;
 343
 344         /* nettype may be NULL; getnettype() supports that */
 345
 346         handle = malloc(sizeof(*handle));
 347         if (handle == NULL) {
 348                 return (NULL);
 349         }
 350         switch (handle->nettype = getnettype(nettype)) {
 351         case _RPC_NETPATH:
 352         case _RPC_CIRCUIT_N:
 353         case _RPC_DATAGRAM_N:
 354                 if (!(handle->nhandle = setnetpath())) {
 355                         free(handle);
 356                         return (NULL);
 357                 }
 358                 handle->nflag = TRUE;
 359                 break;
 360         case _RPC_VISIBLE:
 361         case _RPC_CIRCUIT_V:
 362         case _RPC_DATAGRAM_V:
 363         case _RPC_TCP:
 364         case _RPC_UDP:
 365                 if (!(handle->nhandle = setnetconfig())) {
 366                         syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
 367                         free(handle);
 368                         return (NULL);
 369                 }
 370                 handle->nflag = FALSE;
 371                 break;
 372         default:
 373                 free(handle);
 374                 return (NULL);
 375         }
 376
 377         return (handle);
 378 }
 379
 380 /*
 381  * Returns the next netconfig struct for the given "net" type.
 382  * __rpc_setconf() should have been called previously.
 383  */
 384 struct netconfig *
 385 __rpc_getconf(vhandle)
 386         void *vhandle;
 387 {
 388         struct handle *handle;
 389         struct netconfig *nconf;
 390
 391         handle = (struct handle *)vhandle;
 392         if (handle == NULL) {
 393                 return (NULL);
 394         }
 395         for (;;) {
 396                 if (handle->nflag)
 397                         nconf = getnetpath(handle->nhandle);
 398                 else
 399                         nconf = getnetconfig(handle->nhandle);
 400                 if (nconf == NULL)
 401                         break;
 402                 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
 403                         (nconf->nc_semantics != NC_TPI_COTS) &&
 404                         (nconf->nc_semantics != NC_TPI_COTS_ORD))
 405                         continue;
 406                 switch (handle->nettype) {
 407                 case _RPC_VISIBLE:
 408                         if (!(nconf->nc_flag & NC_VISIBLE))
 409                                 continue;
 410                         /* FALLTHROUGH */
 411                 case _RPC_NETPATH:      /* Be happy */
 412                         break;
 413                 case _RPC_CIRCUIT_V:
 414                         if (!(nconf->nc_flag & NC_VISIBLE))
 415                                 continue;
 416                         /* FALLTHROUGH */
 417                 case _RPC_CIRCUIT_N:
 418                         if ((nconf->nc_semantics != NC_TPI_COTS) &&
 419                                 (nconf->nc_semantics != NC_TPI_COTS_ORD))
 420                                 continue;
 421                         break;
 422                 case _RPC_DATAGRAM_V:
 423                         if (!(nconf->nc_flag & NC_VISIBLE))
 424                                 continue;
 425                         /* FALLTHROUGH */
 426                 case _RPC_DATAGRAM_N:
 427                         if (nconf->nc_semantics != NC_TPI_CLTS)
 428                                 continue;
 429                         break;
 430                 case _RPC_TCP:
 431                         if (((nconf->nc_semantics != NC_TPI_COTS) &&
 432                                 (nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
 433                                 (strcmp(nconf->nc_protofmly, NC_INET)
 434 #ifdef INET6
 435                                  && strcmp(nconf->nc_protofmly, NC_INET6))
 436 #else
 437                                 )
 438 #endif
 439                                 ||
 440                                 strcmp(nconf->nc_proto, NC_TCP))
 441                                 continue;
 442                         break;
 443                 case _RPC_UDP:
 444                         if ((nconf->nc_semantics != NC_TPI_CLTS) ||
 445                                 (strcmp(nconf->nc_protofmly, NC_INET)
 446 #ifdef INET6
 447                                 && strcmp(nconf->nc_protofmly, NC_INET6))
 448 #else
 449                                 )
 450 #endif
 451                                 ||
 452                                 strcmp(nconf->nc_proto, NC_UDP))
 453                                 continue;
 454                         break;
 455                 }
 456                 break;
 457         }
 458         return (nconf);
 459 }
 460
 461 void
 462 __rpc_endconf(vhandle)
 463         void * vhandle;
 464 {
 465         struct handle *handle;
 466
 467         handle = (struct handle *) vhandle;
 468         if (handle == NULL) {
 469                 return;
 470         }
 471         if (handle->nflag) {
 472                 endnetpath(handle->nhandle);
 473         } else {
 474                 endnetconfig(handle->nhandle);
 475         }
 476         free(handle);
 477 }
 478
 479 /*
 480  * Used to ping the NULL procedure for clnt handle.
 481  * Returns NULL if fails, else a non-NULL pointer.
 482  */
 483 void *
 484 rpc_nullproc(clnt)
 485         CLIENT *clnt;
 486 {
 487         struct timeval TIMEOUT = {25, 0};
 488
 489         if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
 490                 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
 491                 return (NULL);
 492         }
 493         return ((void *) clnt);
 494 }
 495
 496 /*
 497  * Try all possible transports until
 498  * one succeeds in finding the netconf for the given fd.
 499  */
 500 struct netconfig *
 501 __rpcgettp(fd)
 502         int fd;
 503 {
 504         const char *netid;
 505         struct __rpc_sockinfo si;
 506
 507         if (!__rpc_fd2sockinfo(fd, &si))
 508                 return NULL;
 509
 510         if (!__rpc_sockinfo2netid(&si, &netid))
 511                 return NULL;
 512
 513         return getnetconfigent(__UNCONST(netid));
 514 }
 515
 516 int
 517 __rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
 518 {
 519         socklen_t len;
 520         int type, proto;
 521         struct sockaddr_storage ss;
 522
 523         _DIAGASSERT(sip != NULL);
 524
 525         len = sizeof ss;
 526         if (getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
 527                 return 0;
 528         sip->si_alen = len;
 529
 530         len = sizeof type;
 531         if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
 532                 return 0;
 533
 534         /* XXX */
 535         if (ss.ss_family != AF_LOCAL) {
 536                 if (type == SOCK_STREAM)
 537                         proto = IPPROTO_TCP;
 538                 else if (type == SOCK_DGRAM)
 539                         proto = IPPROTO_UDP;
 540                 else
 541                         return 0;
 542         } else
 543                 proto = 0;
 544
 545         sip->si_af = ss.ss_family;
 546         sip->si_proto = proto;
 547         sip->si_socktype = type;
 548
 549         return 1;
 550 }
 551
 552 /*
 553  * Linear search, but the number of entries is small.
 554  */
 555 int
 556 __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
 557 {
 558         size_t i;
 559
 560         _DIAGASSERT(nconf != NULL);
 561         _DIAGASSERT(sip != NULL);
 562
 563         for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
 564                 if (!strcmp(na_cvt[i].netid, nconf->nc_netid)) {
 565                         sip->si_af = na_cvt[i].af;
 566                         sip->si_proto = na_cvt[i].protocol;
 567                         sip->si_socktype =
 568                             __rpc_seman2socktype((int)nconf->nc_semantics);
 569                         if (sip->si_socktype == -1)
 570                                 return 0;
 571                         sip->si_alen = __rpc_get_a_size(sip->si_af);
 572                         return 1;
 573                 }
 574
 575         return 0;
 576 }
 577
 578 int
 579 __rpc_nconf2fd(const struct netconfig *nconf)
 580 {
 581         struct __rpc_sockinfo si;
 582
 583         _DIAGASSERT(nconf != NULL);
 584
 585         if (!__rpc_nconf2sockinfo(nconf, &si))
 586                 return 0;
 587
 588         return socket(si.si_af, si.si_socktype, si.si_proto);
 589 }
 590
 591 int
 592 __rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
 593 {
 594         size_t i;
 595
 596         _DIAGASSERT(sip != NULL);
 597         /* netid may be NULL */
 598
 599         for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
 600                 if (na_cvt[i].af == sip->si_af &&
 601                     na_cvt[i].protocol == sip->si_proto) {
 602                         if (netid)
 603                                 *netid = na_cvt[i].netid;
 604                         return 1;
 605                 }
 606
 607         return 0;
 608 }
 609
 610 char *
 611 taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
 612 {
 613         struct __rpc_sockinfo si;
 614
 615         _DIAGASSERT(nconf != NULL);
 616         _DIAGASSERT(nbuf != NULL);
 617
 618         if (!__rpc_nconf2sockinfo(nconf, &si))
 619                 return NULL;
 620         return __rpc_taddr2uaddr_af(si.si_af, nbuf);
 621 }
 622
 623 struct netbuf *
 624 uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
 625 {
 626         struct __rpc_sockinfo si;
 627
 628         _DIAGASSERT(nconf != NULL);
 629         _DIAGASSERT(uaddr != NULL);
 630
 631         if (!__rpc_nconf2sockinfo(nconf, &si))
 632                 return NULL;
 633         return __rpc_uaddr2taddr_af(si.si_af, uaddr);
 634 }
 635
 636 char *
 637 __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
 638 {
 639         char *ret;
 640         struct sockaddr_in *sinp;
 641         struct sockaddr_un *sun;
 642         char namebuf[INET_ADDRSTRLEN];
 643 #ifdef INET6
 644         struct sockaddr_in6 *sin6;
 645         char namebuf6[INET6_ADDRSTRLEN];
 646 #endif
 647         u_int16_t port;
 648
 649         _DIAGASSERT(nbuf != NULL);
 650
 651         switch (af) {
 652         case AF_INET:
 653                 sinp = nbuf->buf;
 654                 if (inet_ntop(af, &sinp->sin_addr, namebuf, sizeof namebuf)
 655                     == NULL)
 656                         return NULL;
 657                 port = ntohs(sinp->sin_port);
 658                 if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
 659                     port & 0xff) < 0)
 660                         return NULL;
 661                 break;
 662 #ifdef INET6
 663         case AF_INET6:
 664                 sin6 = nbuf->buf;
 665                 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
 666                     == NULL)
 667                         return NULL;
 668                 port = ntohs(sin6->sin6_port);
 669                 if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
 670                     port & 0xff) < 0)
 671                         return NULL;
 672                 break;
 673 #endif
 674         case AF_LOCAL:
 675                 sun = nbuf->buf;
 676                 sun->sun_path[sizeof(sun->sun_path) - 1] = '\0'; /* safety */
 677                 ret = strdup(sun->sun_path);
 678                 break;
 679         default:
 680                 return NULL;
 681         }
 682
 683         return ret;
 684 }
 685
 686 struct netbuf *
 687 __rpc_uaddr2taddr_af(int af, const char *uaddr)
 688 {
 689         struct netbuf *ret = NULL;
 690         char *addrstr, *p;
 691         unsigned port, portlo, porthi;
 692         struct sockaddr_in *sinp;
 693 #ifdef INET6
 694         struct sockaddr_in6 *sin6;
 695 #endif
 696         struct sockaddr_un *sun;
 697
 698         _DIAGASSERT(uaddr != NULL);
 699
 700         addrstr = strdup(uaddr);
 701         if (addrstr == NULL)
 702                 return NULL;
 703
 704         /*
 705          * AF_LOCAL addresses are expected to be absolute
 706          * pathnames, anything else will be AF_INET or AF_INET6.
 707          */
 708         port = 0;
 709         if (*addrstr != '/') {
 710                 p = strrchr(addrstr, '.');
 711                 if (p == NULL)
 712                         goto out;
 713                 portlo = (unsigned)atoi(p + 1);
 714                 *p = '\0';
 715
 716                 p = strrchr(addrstr, '.');
 717                 if (p == NULL)
 718                         goto out;
 719                 porthi = (unsigned)atoi(p + 1);
 720                 *p = '\0';
 721                 port = (porthi << 8) | portlo;
 722         }
 723
 724         ret = malloc(sizeof(*ret));
 725         if (ret == NULL)
 726                 goto out;
 727
 728         switch (af) {
 729         case AF_INET:
 730                 sinp = malloc(sizeof(*sinp));
 731                 if (sinp == NULL)
 732                         goto out;
 733                 memset(sinp, 0, sizeof *sinp);
 734                 sinp->sin_family = AF_INET;
 735                 sinp->sin_port = htons(port);
 736                 if (inet_pton(AF_INET, addrstr, &sinp->sin_addr) <= 0) {
 737                         free(sinp);
 738                         free(ret);
 739                         ret = NULL;
 740                         goto out;
 741                 }
 742                 sinp->sin_len = ret->maxlen = ret->len = sizeof *sinp;
 743                 ret->buf = sinp;
 744                 break;
 745 #ifdef INET6
 746         case AF_INET6:
 747                 sin6 = malloc(sizeof(*sin6));
 748                 if (sin6 == NULL)
 749                         goto out;
 750                 memset(sin6, 0, sizeof *sin6);
 751                 sin6->sin6_family = AF_INET6;
 752                 sin6->sin6_port = htons(port);
 753                 if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
 754                         free(sin6);
 755                         free(ret);
 756                         ret = NULL;
 757                         goto out;
 758                 }
 759                 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
 760                 ret->buf = sin6;
 761                 break;
 762 #endif
 763         case AF_LOCAL:
 764                 sun = malloc(sizeof(*sun));
 765                 if (sun == NULL)
 766                         goto out;
 767                 memset(sun, 0, sizeof *sun);
 768                 sun->sun_family = AF_LOCAL;
 769                 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
 770                 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
 771                 ret->buf = sun;
 772                 break;
 773         default:
 774                 break;
 775         }
 776 out:
 777         free(addrstr);
 778         return ret;
 779 }
 780
 781 int
 782 __rpc_seman2socktype(int semantics)
 783 {
 784         switch (semantics) {
 785         case NC_TPI_CLTS:
 786                 return SOCK_DGRAM;
 787         case NC_TPI_COTS_ORD:
 788                 return SOCK_STREAM;
 789         case NC_TPI_RAW:
 790                 return SOCK_RAW;
 791         default:
 792                 break;
 793         }
 794
 795         return -1;
 796 }
 797
 798 int
 799 __rpc_socktype2seman(int socktype)
 800 {
 801         switch (socktype) {
 802         case SOCK_DGRAM:
 803                 return NC_TPI_CLTS;
 804         case SOCK_STREAM:
 805                 return NC_TPI_COTS_ORD;
 806         case SOCK_RAW:
 807                 return NC_TPI_RAW;
 808         default:
 809                 break;
 810         }
 811
 812         return -1;
 813 }
 814
 815 /*
 816  * XXXX - IPv6 scope IDs can't be handled in universal addresses.
 817  * Here, we compare the original server address to that of the RPC
 818  * service we just received back from a call to rpcbind on the remote
 819  * machine. If they are both "link local" or "site local", copy
 820  * the scope id of the server address over to the service address.
 821  */
 822 /* ARGSUSED */
 823 int
 824 __rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
 825 {
 826 #ifdef INET6
 827         struct sockaddr *sa_new, *sa_svc;
 828         struct sockaddr_in6 *sin6_new, *sin6_svc;
 829
 830         _DIAGASSERT(new != NULL);
 831         _DIAGASSERT(svc != NULL);
 832
 833         sa_svc = (struct sockaddr *)svc->buf;
 834         sa_new = (struct sockaddr *)new->buf;
 835
 836         if (sa_new->sa_family == sa_svc->sa_family &&
 837             sa_new->sa_family == AF_INET6) {
 838                 sin6_new = (struct sockaddr_in6 *)new->buf;
 839                 sin6_svc = (struct sockaddr_in6 *)svc->buf;
 840
 841                 if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
 842                      IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
 843                     (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
 844                      IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
 845                         sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
 846                 }
 847         }
 848 #endif
 849         return 1;
 850 }
 851
 852 int
 853 __rpc_sockisbound(int fd)
 854 {
 855         struct sockaddr_storage ss;
 856         socklen_t slen;
 857
 858         slen = sizeof (struct sockaddr_storage);
 859         if (getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
 860                 return 0;
 861
 862         switch (ss.ss_family) {
 863                 case AF_INET:
 864                         return (((struct sockaddr_in *)
 865                             (void *)&ss)->sin_port != 0);
 866 #ifdef INET6
 867                 case AF_INET6:
 868                         return (((struct sockaddr_in6 *)
 869                             (void *)&ss)->sin6_port != 0);
 870 #endif
 871                 case AF_LOCAL:
 872                         /* XXX check this */
 873                         return (((struct sockaddr_un *)
 874                             (void *)&ss)->sun_path[0] != '\0');
 875                 default:
 876                         break;
 877         }
 878
 879         return 0;
 880 }
 881
 882 /*
 883  * For TCP transport, Host Requirements RFCs mandate
 884  * Nagle (RFC-896) processing.  But for RPC, Nagle
 885  * processing adds adds unwanted latency to the last,
 886  * partial TCP segment of each RPC message. See:
 887  *   R. W. Scheifler and J. Gettys, The X Window System,
 888  *   ACM Transactions on Graphics 16:8 (Aug. 1983), pp. 57-69.
 889  * So for TCP transport, disable Nagle via TCP_NODELAY.
 890  * XXX: moral equivalent for non-TCP protocols?
 891  */
 892 int
 893 __rpc_setnodelay(int fd, const struct __rpc_sockinfo *si)
 894 {
 895         int one = 1;
 896         if (si->si_proto != IPPROTO_TCP)
 897                 return 0;
 898         return setsockopt(fd, si->si_proto, TCP_NODELAY, &one, sizeof(one));
 899 }