1/* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $ */ 2 3/*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30/* 31 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 32 */ 33 34/* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */ 35#include <sys/cdefs.h> 36__FBSDID("$FreeBSD$"); 37 38/* 39 * rpc_generic.c, Miscl routines for RPC. 40 * 41 */ 42 43#include "opt_inet6.h" 44 45#include <sys/param.h> 46#include <sys/kernel.h> 47#include <sys/malloc.h> 48#include <sys/mbuf.h> 49#include <sys/module.h> 50#include <sys/proc.h> 51#include <sys/protosw.h> 52#include <sys/sbuf.h> 53#include <sys/systm.h> 54#include <sys/socket.h> 55#include <sys/socketvar.h> 56#include <sys/syslog.h> 57 58#include <net/vnet.h> 59 60#include <rpc/rpc.h> 61#include <rpc/nettype.h> 62#include <rpc/rpcsec_gss.h> 63 64#include <rpc/rpc_com.h> 65 66extern u_long sb_max_adj; /* not defined in socketvar.h */ 67 68#if __FreeBSD_version < 700000 69#define strrchr rindex 70#endif 71 72/* Provide an entry point hook for the rpcsec_gss module. */ 73struct rpc_gss_entries rpc_gss_entries; 74 75struct handle { 76 NCONF_HANDLE *nhandle; 77 int nflag; /* Whether NETPATH or NETCONFIG */ 78 int nettype; 79}; 80 81static const struct _rpcnettype { 82 const char *name; 83 const int type; 84} _rpctypelist[] = { 85 { "netpath", _RPC_NETPATH }, 86 { "visible", _RPC_VISIBLE }, 87 { "circuit_v", _RPC_CIRCUIT_V }, 88 { "datagram_v", _RPC_DATAGRAM_V }, 89 { "circuit_n", _RPC_CIRCUIT_N }, 90 { "datagram_n", _RPC_DATAGRAM_N }, 91 { "tcp", _RPC_TCP }, 92 { "udp", _RPC_UDP }, 93 { 0, _RPC_NONE } 94}; 95 96struct netid_af { 97 const char *netid; 98 int af; 99 int protocol; 100}; 101 102static const struct netid_af na_cvt[] = { 103 { "udp", AF_INET, IPPROTO_UDP }, 104 { "tcp", AF_INET, IPPROTO_TCP }, 105#ifdef INET6 106 { "udp6", AF_INET6, IPPROTO_UDP }, 107 { "tcp6", AF_INET6, IPPROTO_TCP }, 108#endif 109 { "local", AF_LOCAL, 0 } 110}; 111 112struct rpc_createerr rpc_createerr; 113 114/* 115 * Find the appropriate buffer size 116 */ 117u_int 118/*ARGSUSED*/ 119__rpc_get_t_size(int af, int proto, int size) 120{ 121 int defsize; 122 123 switch (proto) { 124 case IPPROTO_TCP: 125 defsize = 64 * 1024; /* XXX */ 126 break; 127 case IPPROTO_UDP: 128 defsize = UDPMSGSIZE; 129 break; 130 default: 131 defsize = RPC_MAXDATASIZE; 132 break; 133 } 134 if (size == 0) 135 return defsize; 136 137 /* Check whether the value is within the upper max limit */ 138 return (size > sb_max_adj ? (u_int)sb_max_adj : (u_int)size); 139} 140 141/* 142 * Find the appropriate address buffer size 143 */ 144u_int 145__rpc_get_a_size(af) 146 int af; 147{ 148 switch (af) { 149 case AF_INET: 150 return sizeof (struct sockaddr_in); 151#ifdef INET6 152 case AF_INET6: 153 return sizeof (struct sockaddr_in6); 154#endif 155 case AF_LOCAL: 156 return sizeof (struct sockaddr_un); 157 default: 158 break; 159 } 160 return ((u_int)RPC_MAXADDRSIZE); 161} 162 163#if 0 164 165/* 166 * Used to ping the NULL procedure for clnt handle. 167 * Returns NULL if fails, else a non-NULL pointer. 168 */ 169void * 170rpc_nullproc(clnt) 171 CLIENT *clnt; 172{ 173 struct timeval TIMEOUT = {25, 0}; 174 175 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL, 176 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) { 177 return (NULL); 178 } 179 return ((void *) clnt); 180} 181 182#endif 183 184int 185__rpc_socket2sockinfo(struct socket *so, struct __rpc_sockinfo *sip) 186{ 187 int type, proto; 188 struct sockaddr *sa; 189 sa_family_t family; 190 struct sockopt opt; 191 int error; 192 193 CURVNET_SET(so->so_vnet); 194 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 195 CURVNET_RESTORE(); 196 if (error) 197 return 0; 198 199 sip->si_alen = sa->sa_len; 200 family = sa->sa_family; 201 free(sa, M_SONAME); 202 203 opt.sopt_dir = SOPT_GET; 204 opt.sopt_level = SOL_SOCKET; 205 opt.sopt_name = SO_TYPE; 206 opt.sopt_val = &type; 207 opt.sopt_valsize = sizeof type; 208 opt.sopt_td = NULL; 209 error = sogetopt(so, &opt); 210 if (error) 211 return 0; 212 213 /* XXX */ 214 if (family != AF_LOCAL) { 215 if (type == SOCK_STREAM) 216 proto = IPPROTO_TCP; 217 else if (type == SOCK_DGRAM) 218 proto = IPPROTO_UDP; 219 else 220 return 0; 221 } else 222 proto = 0; 223 224 sip->si_af = family; 225 sip->si_proto = proto; 226 sip->si_socktype = type; 227 228 return 1; 229} 230 231/* 232 * Linear search, but the number of entries is small. 233 */ 234int 235__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip) 236{ 237 int i; 238 239 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) 240 if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || ( 241 strcmp(nconf->nc_netid, "unix") == 0 && 242 strcmp(na_cvt[i].netid, "local") == 0)) { 243 sip->si_af = na_cvt[i].af; 244 sip->si_proto = na_cvt[i].protocol; 245 sip->si_socktype = 246 __rpc_seman2socktype((int)nconf->nc_semantics); 247 if (sip->si_socktype == -1) 248 return 0; 249 sip->si_alen = __rpc_get_a_size(sip->si_af); 250 return 1; 251 } 252 253 return 0; 254} 255 256struct socket * 257__rpc_nconf2socket(const struct netconfig *nconf) 258{ 259 struct __rpc_sockinfo si; 260 struct socket *so; 261 int error; 262 263 if (!__rpc_nconf2sockinfo(nconf, &si)) 264 return 0; 265 266 so = NULL; 267 error = socreate(si.si_af, &so, si.si_socktype, si.si_proto, 268 curthread->td_ucred, curthread); 269 270 if (error) 271 return NULL; 272 else 273 return so; 274} 275 276char * 277taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf) 278{ 279 struct __rpc_sockinfo si; 280 281 if (!__rpc_nconf2sockinfo(nconf, &si)) 282 return NULL; 283 return __rpc_taddr2uaddr_af(si.si_af, nbuf); 284} 285 286struct netbuf * 287uaddr2taddr(const struct netconfig *nconf, const char *uaddr) 288{ 289 struct __rpc_sockinfo si; 290 291 if (!__rpc_nconf2sockinfo(nconf, &si)) 292 return NULL; 293 return __rpc_uaddr2taddr_af(si.si_af, uaddr); 294} 295 296char * 297__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf) 298{ 299 char *ret; 300 struct sbuf sb; 301 struct sockaddr_in *sin; 302 struct sockaddr_un *sun; 303 char namebuf[INET_ADDRSTRLEN]; 304#ifdef INET6 305 struct sockaddr_in6 *sin6; 306 char namebuf6[INET6_ADDRSTRLEN]; 307#endif 308 u_int16_t port; 309 310 sbuf_new(&sb, NULL, 0, SBUF_AUTOEXTEND); 311 312 switch (af) { 313 case AF_INET: 314 sin = nbuf->buf; 315 if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf) 316 == NULL) 317 return NULL; 318 port = ntohs(sin->sin_port); 319 if (sbuf_printf(&sb, "%s.%u.%u", namebuf, 320 ((uint32_t)port) >> 8, 321 port & 0xff) < 0) 322 return NULL; 323 break; 324#ifdef INET6 325 case AF_INET6: 326 sin6 = nbuf->buf; 327 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6) 328 == NULL) 329 return NULL; 330 port = ntohs(sin6->sin6_port); 331 if (sbuf_printf(&sb, "%s.%u.%u", namebuf6, 332 ((uint32_t)port) >> 8, 333 port & 0xff) < 0) 334 return NULL; 335 break; 336#endif 337 case AF_LOCAL: 338 sun = nbuf->buf; 339 if (sbuf_printf(&sb, "%.*s", (int)(sun->sun_len - 340 offsetof(struct sockaddr_un, sun_path)), 341 sun->sun_path) < 0) 342 return (NULL); 343 break; 344 default: 345 return NULL; 346 } 347 348 sbuf_finish(&sb); 349 ret = strdup(sbuf_data(&sb), M_RPC); 350 sbuf_delete(&sb); 351 352 return ret; 353} 354 355struct netbuf * 356__rpc_uaddr2taddr_af(int af, const char *uaddr) 357{ 358 struct netbuf *ret = NULL; 359 char *addrstr, *p; 360 unsigned port, portlo, porthi; 361 struct sockaddr_in *sin; 362#ifdef INET6 363 struct sockaddr_in6 *sin6; 364#endif 365 struct sockaddr_un *sun; 366 367 port = 0; 368 sin = NULL; 369 addrstr = strdup(uaddr, M_RPC); 370 if (addrstr == NULL) 371 return NULL; 372 373 /* 374 * AF_LOCAL addresses are expected to be absolute 375 * pathnames, anything else will be AF_INET or AF_INET6. 376 */ 377 if (*addrstr != '/') { 378 p = strrchr(addrstr, '.'); 379 if (p == NULL) 380 goto out; 381 portlo = (unsigned)strtol(p + 1, NULL, 10); 382 *p = '\0'; 383 384 p = strrchr(addrstr, '.'); 385 if (p == NULL) 386 goto out; 387 porthi = (unsigned)strtol(p + 1, NULL, 10); 388 *p = '\0'; 389 port = (porthi << 8) | portlo; 390 } 391 392 ret = (struct netbuf *)malloc(sizeof *ret, M_RPC, M_WAITOK); 393 if (ret == NULL) 394 goto out; 395 396 switch (af) { 397 case AF_INET: 398 sin = (struct sockaddr_in *)malloc(sizeof *sin, M_RPC, 399 M_WAITOK); 400 if (sin == NULL) 401 goto out; 402 memset(sin, 0, sizeof *sin); 403 sin->sin_family = AF_INET; 404 sin->sin_port = htons(port); 405 if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) { 406 free(sin, M_RPC); 407 free(ret, M_RPC); 408 ret = NULL; 409 goto out; 410 } 411 sin->sin_len = ret->maxlen = ret->len = sizeof *sin; 412 ret->buf = sin; 413 break; 414#ifdef INET6 415 case AF_INET6: 416 sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6, M_RPC, 417 M_WAITOK); 418 if (sin6 == NULL) 419 goto out; 420 memset(sin6, 0, sizeof *sin6); 421 sin6->sin6_family = AF_INET6; 422 sin6->sin6_port = htons(port); 423 if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) { 424 free(sin6, M_RPC); 425 free(ret, M_RPC); 426 ret = NULL; 427 goto out; 428 } 429 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6; 430 ret->buf = sin6; 431 break; 432#endif 433 case AF_LOCAL: 434 sun = (struct sockaddr_un *)malloc(sizeof *sun, M_RPC, 435 M_WAITOK); 436 if (sun == NULL) 437 goto out; 438 memset(sun, 0, sizeof *sun); 439 sun->sun_family = AF_LOCAL; 440 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1); 441 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun); 442 ret->buf = sun; 443 break; 444 default: 445 break; 446 } 447out: 448 free(addrstr, M_RPC); 449 return ret; 450} 451 452int 453__rpc_seman2socktype(int semantics) 454{ 455 switch (semantics) { 456 case NC_TPI_CLTS: 457 return SOCK_DGRAM; 458 case NC_TPI_COTS_ORD: 459 return SOCK_STREAM; 460 case NC_TPI_RAW: 461 return SOCK_RAW; 462 default: 463 break; 464 } 465 466 return -1; 467} 468 469int 470__rpc_socktype2seman(int socktype) 471{ 472 switch (socktype) { 473 case SOCK_DGRAM: 474 return NC_TPI_CLTS; 475 case SOCK_STREAM: 476 return NC_TPI_COTS_ORD; 477 case SOCK_RAW: 478 return NC_TPI_RAW; 479 default: 480 break; 481 } 482 483 return -1; 484} 485 486/* 487 * Returns the type of the network as defined in <rpc/nettype.h> 488 * If nettype is NULL, it defaults to NETPATH. 489 */ 490static int 491getnettype(const char *nettype) 492{ 493 int i; 494 495 if ((nettype == NULL) || (nettype[0] == 0)) { 496 return (_RPC_NETPATH); /* Default */ 497 } 498 499#if 0 500 nettype = strlocase(nettype); 501#endif 502 for (i = 0; _rpctypelist[i].name; i++) 503 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) { 504 return (_rpctypelist[i].type); 505 } 506 return (_rpctypelist[i].type); 507} 508 509/* 510 * For the given nettype (tcp or udp only), return the first structure found. 511 * This should be freed by calling freenetconfigent() 512 */ 513struct netconfig * 514__rpc_getconfip(const char *nettype) 515{ 516 char *netid; 517 static char *netid_tcp = (char *) NULL; 518 static char *netid_udp = (char *) NULL; 519 struct netconfig *dummy; 520 521 if (!netid_udp && !netid_tcp) { 522 struct netconfig *nconf; 523 void *confighandle; 524 525 if (!(confighandle = setnetconfig())) { 526 log(LOG_ERR, "rpc: failed to open " NETCONFIG); 527 return (NULL); 528 } 529 while ((nconf = getnetconfig(confighandle)) != NULL) { 530 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 531 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 532 netid_tcp = strdup(nconf->nc_netid, 533 M_RPC); 534 } else 535 if (strcmp(nconf->nc_proto, NC_UDP) == 0) { 536 netid_udp = strdup(nconf->nc_netid, 537 M_RPC); 538 } 539 } 540 } 541 endnetconfig(confighandle); 542 } 543 if (strcmp(nettype, "udp") == 0) 544 netid = netid_udp; 545 else if (strcmp(nettype, "tcp") == 0) 546 netid = netid_tcp; 547 else { 548 return (NULL); 549 } 550 if ((netid == NULL) || (netid[0] == 0)) { 551 return (NULL); 552 } 553 dummy = getnetconfigent(netid); 554 return (dummy); 555} 556 557/* 558 * Returns the type of the nettype, which should then be used with 559 * __rpc_getconf(). 560 * 561 * For simplicity in the kernel, we don't support the NETPATH 562 * environment variable. We behave as userland would then NETPATH is 563 * unset, i.e. iterate over all visible entries in netconfig. 564 */ 565void * 566__rpc_setconf(nettype) 567 const char *nettype; 568{ 569 struct handle *handle; 570 571 handle = (struct handle *) malloc(sizeof (struct handle), 572 M_RPC, M_WAITOK); 573 switch (handle->nettype = getnettype(nettype)) { 574 case _RPC_NETPATH: 575 case _RPC_CIRCUIT_N: 576 case _RPC_DATAGRAM_N: 577 if (!(handle->nhandle = setnetconfig())) 578 goto failed; 579 handle->nflag = TRUE; 580 break; 581 case _RPC_VISIBLE: 582 case _RPC_CIRCUIT_V: 583 case _RPC_DATAGRAM_V: 584 case _RPC_TCP: 585 case _RPC_UDP: 586 if (!(handle->nhandle = setnetconfig())) { 587 log(LOG_ERR, "rpc: failed to open " NETCONFIG); 588 goto failed; 589 } 590 handle->nflag = FALSE; 591 break; 592 default: 593 goto failed; 594 } 595 596 return (handle); 597 598failed: 599 free(handle, M_RPC); 600 return (NULL); 601} 602 603/* 604 * Returns the next netconfig struct for the given "net" type. 605 * __rpc_setconf() should have been called previously. 606 */ 607struct netconfig * 608__rpc_getconf(void *vhandle) 609{ 610 struct handle *handle; 611 struct netconfig *nconf; 612 613 handle = (struct handle *)vhandle; 614 if (handle == NULL) { 615 return (NULL); 616 } 617 for (;;) { 618 if (handle->nflag) { 619 nconf = getnetconfig(handle->nhandle); 620 if (nconf && !(nconf->nc_flag & NC_VISIBLE)) 621 continue; 622 } else { 623 nconf = getnetconfig(handle->nhandle); 624 } 625 if (nconf == NULL) 626 break; 627 if ((nconf->nc_semantics != NC_TPI_CLTS) && 628 (nconf->nc_semantics != NC_TPI_COTS) && 629 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 630 continue; 631 switch (handle->nettype) { 632 case _RPC_VISIBLE: 633 if (!(nconf->nc_flag & NC_VISIBLE)) 634 continue; 635 /* FALLTHROUGH */ 636 case _RPC_NETPATH: /* Be happy */ 637 break; 638 case _RPC_CIRCUIT_V: 639 if (!(nconf->nc_flag & NC_VISIBLE)) 640 continue; 641 /* FALLTHROUGH */ 642 case _RPC_CIRCUIT_N: 643 if ((nconf->nc_semantics != NC_TPI_COTS) && 644 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 645 continue; 646 break; 647 case _RPC_DATAGRAM_V: 648 if (!(nconf->nc_flag & NC_VISIBLE)) 649 continue; 650 /* FALLTHROUGH */ 651 case _RPC_DATAGRAM_N: 652 if (nconf->nc_semantics != NC_TPI_CLTS) 653 continue; 654 break; 655 case _RPC_TCP: 656 if (((nconf->nc_semantics != NC_TPI_COTS) && 657 (nconf->nc_semantics != NC_TPI_COTS_ORD)) || 658 (strcmp(nconf->nc_protofmly, NC_INET) 659#ifdef INET6 660 && strcmp(nconf->nc_protofmly, NC_INET6)) 661#else 662 ) 663#endif 664 || 665 strcmp(nconf->nc_proto, NC_TCP)) 666 continue; 667 break; 668 case _RPC_UDP: 669 if ((nconf->nc_semantics != NC_TPI_CLTS) || 670 (strcmp(nconf->nc_protofmly, NC_INET) 671#ifdef INET6 672 && strcmp(nconf->nc_protofmly, NC_INET6)) 673#else 674 ) 675#endif 676 || 677 strcmp(nconf->nc_proto, NC_UDP)) 678 continue; 679 break; 680 } 681 break; 682 } 683 return (nconf); 684} 685 686void 687__rpc_endconf(vhandle) 688 void * vhandle; 689{ 690 struct handle *handle; 691 692 handle = (struct handle *) vhandle; 693 if (handle == NULL) { 694 return; 695 } 696 endnetconfig(handle->nhandle); 697 free(handle, M_RPC); 698} 699 700int 701__rpc_sockisbound(struct socket *so) 702{ 703 struct sockaddr *sa; 704 int error, bound; 705 706 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 707 if (error) 708 return (0); 709 710 switch (sa->sa_family) { 711 case AF_INET: 712 bound = (((struct sockaddr_in *) sa)->sin_port != 0); 713 break; 714#ifdef INET6 715 case AF_INET6: 716 bound = (((struct sockaddr_in6 *) sa)->sin6_port != 0); 717 break; 718#endif 719 case AF_LOCAL: 720 /* XXX check this */ 721 bound = (((struct sockaddr_un *) sa)->sun_path[0] != '\0'); 722 break; 723 default: 724 bound = FALSE; 725 break; 726 } 727 728 free(sa, M_SONAME); 729 730 return bound; 731} 732 733/* 734 * Implement XDR-style API for RPC call. 735 */ 736enum clnt_stat 737clnt_call_private( 738 CLIENT *cl, /* client handle */ 739 struct rpc_callextra *ext, /* call metadata */ 740 rpcproc_t proc, /* procedure number */ 741 xdrproc_t xargs, /* xdr routine for args */ 742 void *argsp, /* pointer to args */ 743 xdrproc_t xresults, /* xdr routine for results */ 744 void *resultsp, /* pointer to results */ 745 struct timeval utimeout) /* seconds to wait before giving up */ 746{ 747 XDR xdrs; 748 struct mbuf *mreq; 749 struct mbuf *mrep; 750 enum clnt_stat stat; 751 752 mreq = m_getcl(M_WAITOK, MT_DATA, 0); 753 754 xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 755 if (!xargs(&xdrs, argsp)) { 756 m_freem(mreq); 757 return (RPC_CANTENCODEARGS); 758 } 759 XDR_DESTROY(&xdrs); 760 761 stat = CLNT_CALL_MBUF(cl, ext, proc, mreq, &mrep, utimeout); 762 m_freem(mreq); 763 764 if (stat == RPC_SUCCESS) { 765 xdrmbuf_create(&xdrs, mrep, XDR_DECODE); 766 if (!xresults(&xdrs, resultsp)) { 767 XDR_DESTROY(&xdrs); 768 return (RPC_CANTDECODERES); 769 } 770 XDR_DESTROY(&xdrs); 771 } 772 773 return (stat); 774} 775 776/* 777 * Bind a socket to a privileged IP port 778 */ 779int 780bindresvport(struct socket *so, struct sockaddr *sa) 781{ 782 int old, error, af; 783 bool_t freesa = FALSE; 784 struct sockaddr_in *sin; 785#ifdef INET6 786 struct sockaddr_in6 *sin6; 787#endif 788 struct sockopt opt; 789 int proto, portrange, portlow; 790 u_int16_t *portp; 791 socklen_t salen; 792 793 if (sa == NULL) { 794 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 795 if (error) 796 return (error); 797 freesa = TRUE; 798 af = sa->sa_family; 799 salen = sa->sa_len; 800 memset(sa, 0, sa->sa_len); 801 } else { 802 af = sa->sa_family; 803 salen = sa->sa_len; 804 } 805 806 switch (af) { 807 case AF_INET: 808 proto = IPPROTO_IP; 809 portrange = IP_PORTRANGE; 810 portlow = IP_PORTRANGE_LOW; 811 sin = (struct sockaddr_in *)sa; 812 portp = &sin->sin_port; 813 break; 814#ifdef INET6 815 case AF_INET6: 816 proto = IPPROTO_IPV6; 817 portrange = IPV6_PORTRANGE; 818 portlow = IPV6_PORTRANGE_LOW; 819 sin6 = (struct sockaddr_in6 *)sa; 820 portp = &sin6->sin6_port; 821 break; 822#endif 823 default: 824 return (EPFNOSUPPORT); 825 } 826 827 sa->sa_family = af; 828 sa->sa_len = salen; 829 830 if (*portp == 0) { 831 bzero(&opt, sizeof(opt)); 832 opt.sopt_dir = SOPT_GET; 833 opt.sopt_level = proto; 834 opt.sopt_name = portrange; 835 opt.sopt_val = &old; 836 opt.sopt_valsize = sizeof(old); 837 error = sogetopt(so, &opt); 838 if (error) { 839 goto out; 840 } 841 842 opt.sopt_dir = SOPT_SET; 843 opt.sopt_val = &portlow; 844 error = sosetopt(so, &opt); 845 if (error) 846 goto out; 847 } 848 849 error = sobind(so, sa, curthread); 850 851 if (*portp == 0) { 852 if (error) { 853 opt.sopt_dir = SOPT_SET; 854 opt.sopt_val = &old; 855 sosetopt(so, &opt); 856 } 857 } 858out: 859 if (freesa) 860 free(sa, M_SONAME); 861 862 return (error); 863} 864 865/* 866 * Kernel module glue 867 */ 868static int 869krpc_modevent(module_t mod, int type, void *data) 870{ 871 872 return (0); 873} 874static moduledata_t krpc_mod = { 875 "krpc", 876 krpc_modevent, 877 NULL, 878}; 879DECLARE_MODULE(krpc, krpc_mod, SI_SUB_VFS, SI_ORDER_ANY); 880 881/* So that loader and kldload(2) can find us, wherever we are.. */ 882MODULE_VERSION(krpc, 1); 883