1 /* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink 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 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * rpc_generic.c, Miscl routines for RPC. 41 * 42 */ 43 44 #include "opt_inet6.h" 45 46 #include <sys/param.h> 47 #include <sys/kernel.h> 48 #include <sys/malloc.h> 49 #include <sys/mbuf.h> 50 #include <sys/module.h> 51 #include <sys/proc.h> 52 #include <sys/protosw.h> 53 #include <sys/sbuf.h> 54 #include <sys/systm.h> 55 #include <sys/socket.h> 56 #include <sys/socketvar.h> 57 #include <sys/syslog.h> 58 59 #include <net/vnet.h> 60 61 #include <rpc/rpc.h> 62 #include <rpc/nettype.h> 63 #include <rpc/rpcsec_gss.h> 64 65 #include <rpc/rpc_com.h> 66 67 extern u_long sb_max_adj; /* not defined in socketvar.h */ 68 69 #if __FreeBSD_version < 700000 70 #define strrchr rindex 71 #endif 72 73 /* Provide an entry point hook for the rpcsec_gss module. */ 74 struct rpc_gss_entries rpc_gss_entries; 75 76 struct handle { 77 NCONF_HANDLE *nhandle; 78 int nflag; /* Whether NETPATH or NETCONFIG */ 79 int nettype; 80 }; 81 82 static const struct _rpcnettype { 83 const char *name; 84 const int type; 85 } _rpctypelist[] = { 86 { "netpath", _RPC_NETPATH }, 87 { "visible", _RPC_VISIBLE }, 88 { "circuit_v", _RPC_CIRCUIT_V }, 89 { "datagram_v", _RPC_DATAGRAM_V }, 90 { "circuit_n", _RPC_CIRCUIT_N }, 91 { "datagram_n", _RPC_DATAGRAM_N }, 92 { "tcp", _RPC_TCP }, 93 { "udp", _RPC_UDP }, 94 { 0, _RPC_NONE } 95 }; 96 97 struct netid_af { 98 const char *netid; 99 int af; 100 int protocol; 101 }; 102 103 static const struct netid_af na_cvt[] = { 104 { "udp", AF_INET, IPPROTO_UDP }, 105 { "tcp", AF_INET, IPPROTO_TCP }, 106 #ifdef INET6 107 { "udp6", AF_INET6, IPPROTO_UDP }, 108 { "tcp6", AF_INET6, IPPROTO_TCP }, 109 #endif 110 { "local", AF_LOCAL, 0 } 111 }; 112 113 struct rpc_createerr rpc_createerr; 114 115 /* 116 * Find the appropriate buffer size 117 */ 118 u_int 119 /*ARGSUSED*/ 120 __rpc_get_t_size(int af, int proto, int size) 121 { 122 int defsize; 123 124 switch (proto) { 125 case IPPROTO_TCP: 126 defsize = 64 * 1024; /* XXX */ 127 break; 128 case IPPROTO_UDP: 129 defsize = UDPMSGSIZE; 130 break; 131 default: 132 defsize = RPC_MAXDATASIZE; 133 break; 134 } 135 if (size == 0) 136 return defsize; 137 138 /* Check whether the value is within the upper max limit */ 139 return (size > sb_max_adj ? (u_int)sb_max_adj : (u_int)size); 140 } 141 142 /* 143 * Find the appropriate address buffer size 144 */ 145 u_int 146 __rpc_get_a_size(af) 147 int af; 148 { 149 switch (af) { 150 case AF_INET: 151 return sizeof (struct sockaddr_in); 152 #ifdef INET6 153 case AF_INET6: 154 return sizeof (struct sockaddr_in6); 155 #endif 156 case AF_LOCAL: 157 return sizeof (struct sockaddr_un); 158 default: 159 break; 160 } 161 return ((u_int)RPC_MAXADDRSIZE); 162 } 163 164 #if 0 165 166 /* 167 * Used to ping the NULL procedure for clnt handle. 168 * Returns NULL if fails, else a non-NULL pointer. 169 */ 170 void * 171 rpc_nullproc(clnt) 172 CLIENT *clnt; 173 { 174 struct timeval TIMEOUT = {25, 0}; 175 176 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL, 177 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) { 178 return (NULL); 179 } 180 return ((void *) clnt); 181 } 182 183 #endif 184 185 int 186 __rpc_socket2sockinfo(struct socket *so, struct __rpc_sockinfo *sip) 187 { 188 int type, proto; 189 struct sockaddr *sa; 190 sa_family_t family; 191 struct sockopt opt; 192 int error; 193 194 CURVNET_SET(so->so_vnet); 195 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 196 CURVNET_RESTORE(); 197 if (error) 198 return 0; 199 200 sip->si_alen = sa->sa_len; 201 family = sa->sa_family; 202 free(sa, M_SONAME); 203 204 opt.sopt_dir = SOPT_GET; 205 opt.sopt_level = SOL_SOCKET; 206 opt.sopt_name = SO_TYPE; 207 opt.sopt_val = &type; 208 opt.sopt_valsize = sizeof type; 209 opt.sopt_td = NULL; 210 error = sogetopt(so, &opt); 211 if (error) 212 return 0; 213 214 /* XXX */ 215 if (family != AF_LOCAL) { 216 if (type == SOCK_STREAM) 217 proto = IPPROTO_TCP; 218 else if (type == SOCK_DGRAM) 219 proto = IPPROTO_UDP; 220 else 221 return 0; 222 } else 223 proto = 0; 224 225 sip->si_af = family; 226 sip->si_proto = proto; 227 sip->si_socktype = type; 228 229 return 1; 230 } 231 232 /* 233 * Linear search, but the number of entries is small. 234 */ 235 int 236 __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip) 237 { 238 int i; 239 240 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) 241 if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || ( 242 strcmp(nconf->nc_netid, "unix") == 0 && 243 strcmp(na_cvt[i].netid, "local") == 0)) { 244 sip->si_af = na_cvt[i].af; 245 sip->si_proto = na_cvt[i].protocol; 246 sip->si_socktype = 247 __rpc_seman2socktype((int)nconf->nc_semantics); 248 if (sip->si_socktype == -1) 249 return 0; 250 sip->si_alen = __rpc_get_a_size(sip->si_af); 251 return 1; 252 } 253 254 return 0; 255 } 256 257 struct socket * 258 __rpc_nconf2socket(const struct netconfig *nconf) 259 { 260 struct __rpc_sockinfo si; 261 struct socket *so; 262 int error; 263 264 if (!__rpc_nconf2sockinfo(nconf, &si)) 265 return 0; 266 267 so = NULL; 268 error = socreate(si.si_af, &so, si.si_socktype, si.si_proto, 269 curthread->td_ucred, curthread); 270 271 if (error) 272 return NULL; 273 else 274 return so; 275 } 276 277 char * 278 taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf) 279 { 280 struct __rpc_sockinfo si; 281 282 if (!__rpc_nconf2sockinfo(nconf, &si)) 283 return NULL; 284 return __rpc_taddr2uaddr_af(si.si_af, nbuf); 285 } 286 287 struct netbuf * 288 uaddr2taddr(const struct netconfig *nconf, const char *uaddr) 289 { 290 struct __rpc_sockinfo si; 291 292 if (!__rpc_nconf2sockinfo(nconf, &si)) 293 return NULL; 294 return __rpc_uaddr2taddr_af(si.si_af, uaddr); 295 } 296 297 char * 298 __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf) 299 { 300 char *ret; 301 struct sbuf sb; 302 struct sockaddr_in *sin; 303 struct sockaddr_un *sun; 304 char namebuf[INET_ADDRSTRLEN]; 305 #ifdef INET6 306 struct sockaddr_in6 *sin6; 307 char namebuf6[INET6_ADDRSTRLEN]; 308 #endif 309 u_int16_t port; 310 311 sbuf_new(&sb, NULL, 0, SBUF_AUTOEXTEND); 312 313 switch (af) { 314 case AF_INET: 315 sin = nbuf->buf; 316 if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf) 317 == NULL) 318 return NULL; 319 port = ntohs(sin->sin_port); 320 if (sbuf_printf(&sb, "%s.%u.%u", namebuf, 321 ((uint32_t)port) >> 8, 322 port & 0xff) < 0) 323 return NULL; 324 break; 325 #ifdef INET6 326 case AF_INET6: 327 sin6 = nbuf->buf; 328 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6) 329 == NULL) 330 return NULL; 331 port = ntohs(sin6->sin6_port); 332 if (sbuf_printf(&sb, "%s.%u.%u", namebuf6, 333 ((uint32_t)port) >> 8, 334 port & 0xff) < 0) 335 return NULL; 336 break; 337 #endif 338 case AF_LOCAL: 339 sun = nbuf->buf; 340 if (sbuf_printf(&sb, "%.*s", (int)(sun->sun_len - 341 offsetof(struct sockaddr_un, sun_path)), 342 sun->sun_path) < 0) 343 return (NULL); 344 break; 345 default: 346 return NULL; 347 } 348 349 sbuf_finish(&sb); 350 ret = strdup(sbuf_data(&sb), M_RPC); 351 sbuf_delete(&sb); 352 353 return ret; 354 } 355 356 struct netbuf * 357 __rpc_uaddr2taddr_af(int af, const char *uaddr) 358 { 359 struct netbuf *ret = NULL; 360 char *addrstr, *p; 361 unsigned port, portlo, porthi; 362 struct sockaddr_in *sin; 363 #ifdef INET6 364 struct sockaddr_in6 *sin6; 365 #endif 366 struct sockaddr_un *sun; 367 368 port = 0; 369 sin = NULL; 370 addrstr = strdup(uaddr, M_RPC); 371 if (addrstr == NULL) 372 return NULL; 373 374 /* 375 * AF_LOCAL addresses are expected to be absolute 376 * pathnames, anything else will be AF_INET or AF_INET6. 377 */ 378 if (*addrstr != '/') { 379 p = strrchr(addrstr, '.'); 380 if (p == NULL) 381 goto out; 382 portlo = (unsigned)strtol(p + 1, NULL, 10); 383 *p = '\0'; 384 385 p = strrchr(addrstr, '.'); 386 if (p == NULL) 387 goto out; 388 porthi = (unsigned)strtol(p + 1, NULL, 10); 389 *p = '\0'; 390 port = (porthi << 8) | portlo; 391 } 392 393 ret = (struct netbuf *)malloc(sizeof *ret, M_RPC, M_WAITOK); 394 if (ret == NULL) 395 goto out; 396 397 switch (af) { 398 case AF_INET: 399 sin = (struct sockaddr_in *)malloc(sizeof *sin, M_RPC, 400 M_WAITOK); 401 if (sin == NULL) 402 goto out; 403 memset(sin, 0, sizeof *sin); 404 sin->sin_family = AF_INET; 405 sin->sin_port = htons(port); 406 if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) { 407 free(sin, M_RPC); 408 free(ret, M_RPC); 409 ret = NULL; 410 goto out; 411 } 412 sin->sin_len = ret->maxlen = ret->len = sizeof *sin; 413 ret->buf = sin; 414 break; 415 #ifdef INET6 416 case AF_INET6: 417 sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6, M_RPC, 418 M_WAITOK); 419 if (sin6 == NULL) 420 goto out; 421 memset(sin6, 0, sizeof *sin6); 422 sin6->sin6_family = AF_INET6; 423 sin6->sin6_port = htons(port); 424 if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) { 425 free(sin6, M_RPC); 426 free(ret, M_RPC); 427 ret = NULL; 428 goto out; 429 } 430 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6; 431 ret->buf = sin6; 432 break; 433 #endif 434 case AF_LOCAL: 435 sun = (struct sockaddr_un *)malloc(sizeof *sun, M_RPC, 436 M_WAITOK); 437 if (sun == NULL) 438 goto out; 439 memset(sun, 0, sizeof *sun); 440 sun->sun_family = AF_LOCAL; 441 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1); 442 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun); 443 ret->buf = sun; 444 break; 445 default: 446 break; 447 } 448 out: 449 free(addrstr, M_RPC); 450 return ret; 451 } 452 453 int 454 __rpc_seman2socktype(int semantics) 455 { 456 switch (semantics) { 457 case NC_TPI_CLTS: 458 return SOCK_DGRAM; 459 case NC_TPI_COTS_ORD: 460 return SOCK_STREAM; 461 case NC_TPI_RAW: 462 return SOCK_RAW; 463 default: 464 break; 465 } 466 467 return -1; 468 } 469 470 int 471 __rpc_socktype2seman(int socktype) 472 { 473 switch (socktype) { 474 case SOCK_DGRAM: 475 return NC_TPI_CLTS; 476 case SOCK_STREAM: 477 return NC_TPI_COTS_ORD; 478 case SOCK_RAW: 479 return NC_TPI_RAW; 480 default: 481 break; 482 } 483 484 return -1; 485 } 486 487 /* 488 * Returns the type of the network as defined in <rpc/nettype.h> 489 * If nettype is NULL, it defaults to NETPATH. 490 */ 491 static int 492 getnettype(const char *nettype) 493 { 494 int i; 495 496 if ((nettype == NULL) || (nettype[0] == 0)) { 497 return (_RPC_NETPATH); /* Default */ 498 } 499 500 #if 0 501 nettype = strlocase(nettype); 502 #endif 503 for (i = 0; _rpctypelist[i].name; i++) 504 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) { 505 return (_rpctypelist[i].type); 506 } 507 return (_rpctypelist[i].type); 508 } 509 510 /* 511 * For the given nettype (tcp or udp only), return the first structure found. 512 * This should be freed by calling freenetconfigent() 513 */ 514 struct netconfig * 515 __rpc_getconfip(const char *nettype) 516 { 517 char *netid; 518 static char *netid_tcp = (char *) NULL; 519 static char *netid_udp = (char *) NULL; 520 struct netconfig *dummy; 521 522 if (!netid_udp && !netid_tcp) { 523 struct netconfig *nconf; 524 void *confighandle; 525 526 if (!(confighandle = setnetconfig())) { 527 log(LOG_ERR, "rpc: failed to open " NETCONFIG); 528 return (NULL); 529 } 530 while ((nconf = getnetconfig(confighandle)) != NULL) { 531 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 532 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 533 netid_tcp = strdup(nconf->nc_netid, 534 M_RPC); 535 } else 536 if (strcmp(nconf->nc_proto, NC_UDP) == 0) { 537 netid_udp = strdup(nconf->nc_netid, 538 M_RPC); 539 } 540 } 541 } 542 endnetconfig(confighandle); 543 } 544 if (strcmp(nettype, "udp") == 0) 545 netid = netid_udp; 546 else if (strcmp(nettype, "tcp") == 0) 547 netid = netid_tcp; 548 else { 549 return (NULL); 550 } 551 if ((netid == NULL) || (netid[0] == 0)) { 552 return (NULL); 553 } 554 dummy = getnetconfigent(netid); 555 return (dummy); 556 } 557 558 /* 559 * Returns the type of the nettype, which should then be used with 560 * __rpc_getconf(). 561 * 562 * For simplicity in the kernel, we don't support the NETPATH 563 * environment variable. We behave as userland would then NETPATH is 564 * unset, i.e. iterate over all visible entries in netconfig. 565 */ 566 void * 567 __rpc_setconf(nettype) 568 const char *nettype; 569 { 570 struct handle *handle; 571 572 handle = (struct handle *) malloc(sizeof (struct handle), 573 M_RPC, M_WAITOK); 574 switch (handle->nettype = getnettype(nettype)) { 575 case _RPC_NETPATH: 576 case _RPC_CIRCUIT_N: 577 case _RPC_DATAGRAM_N: 578 if (!(handle->nhandle = setnetconfig())) 579 goto failed; 580 handle->nflag = TRUE; 581 break; 582 case _RPC_VISIBLE: 583 case _RPC_CIRCUIT_V: 584 case _RPC_DATAGRAM_V: 585 case _RPC_TCP: 586 case _RPC_UDP: 587 if (!(handle->nhandle = setnetconfig())) { 588 log(LOG_ERR, "rpc: failed to open " NETCONFIG); 589 goto failed; 590 } 591 handle->nflag = FALSE; 592 break; 593 default: 594 goto failed; 595 } 596 597 return (handle); 598 599 failed: 600 free(handle, M_RPC); 601 return (NULL); 602 } 603 604 /* 605 * Returns the next netconfig struct for the given "net" type. 606 * __rpc_setconf() should have been called previously. 607 */ 608 struct netconfig * 609 __rpc_getconf(void *vhandle) 610 { 611 struct handle *handle; 612 struct netconfig *nconf; 613 614 handle = (struct handle *)vhandle; 615 if (handle == NULL) { 616 return (NULL); 617 } 618 for (;;) { 619 if (handle->nflag) { 620 nconf = getnetconfig(handle->nhandle); 621 if (nconf && !(nconf->nc_flag & NC_VISIBLE)) 622 continue; 623 } else { 624 nconf = getnetconfig(handle->nhandle); 625 } 626 if (nconf == NULL) 627 break; 628 if ((nconf->nc_semantics != NC_TPI_CLTS) && 629 (nconf->nc_semantics != NC_TPI_COTS) && 630 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 631 continue; 632 switch (handle->nettype) { 633 case _RPC_VISIBLE: 634 if (!(nconf->nc_flag & NC_VISIBLE)) 635 continue; 636 /* FALLTHROUGH */ 637 case _RPC_NETPATH: /* Be happy */ 638 break; 639 case _RPC_CIRCUIT_V: 640 if (!(nconf->nc_flag & NC_VISIBLE)) 641 continue; 642 /* FALLTHROUGH */ 643 case _RPC_CIRCUIT_N: 644 if ((nconf->nc_semantics != NC_TPI_COTS) && 645 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 646 continue; 647 break; 648 case _RPC_DATAGRAM_V: 649 if (!(nconf->nc_flag & NC_VISIBLE)) 650 continue; 651 /* FALLTHROUGH */ 652 case _RPC_DATAGRAM_N: 653 if (nconf->nc_semantics != NC_TPI_CLTS) 654 continue; 655 break; 656 case _RPC_TCP: 657 if (((nconf->nc_semantics != NC_TPI_COTS) && 658 (nconf->nc_semantics != NC_TPI_COTS_ORD)) || 659 (strcmp(nconf->nc_protofmly, NC_INET) 660 #ifdef INET6 661 && strcmp(nconf->nc_protofmly, NC_INET6)) 662 #else 663 ) 664 #endif 665 || 666 strcmp(nconf->nc_proto, NC_TCP)) 667 continue; 668 break; 669 case _RPC_UDP: 670 if ((nconf->nc_semantics != NC_TPI_CLTS) || 671 (strcmp(nconf->nc_protofmly, NC_INET) 672 #ifdef INET6 673 && strcmp(nconf->nc_protofmly, NC_INET6)) 674 #else 675 ) 676 #endif 677 || 678 strcmp(nconf->nc_proto, NC_UDP)) 679 continue; 680 break; 681 } 682 break; 683 } 684 return (nconf); 685 } 686 687 void 688 __rpc_endconf(vhandle) 689 void * vhandle; 690 { 691 struct handle *handle; 692 693 handle = (struct handle *) vhandle; 694 if (handle == NULL) { 695 return; 696 } 697 endnetconfig(handle->nhandle); 698 free(handle, M_RPC); 699 } 700 701 int 702 __rpc_sockisbound(struct socket *so) 703 { 704 struct sockaddr *sa; 705 int error, bound; 706 707 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 708 if (error) 709 return (0); 710 711 switch (sa->sa_family) { 712 case AF_INET: 713 bound = (((struct sockaddr_in *) sa)->sin_port != 0); 714 break; 715 #ifdef INET6 716 case AF_INET6: 717 bound = (((struct sockaddr_in6 *) sa)->sin6_port != 0); 718 break; 719 #endif 720 case AF_LOCAL: 721 /* XXX check this */ 722 bound = (((struct sockaddr_un *) sa)->sun_path[0] != '\0'); 723 break; 724 default: 725 bound = FALSE; 726 break; 727 } 728 729 free(sa, M_SONAME); 730 731 return bound; 732 } 733 734 /* 735 * Implement XDR-style API for RPC call. 736 */ 737 enum clnt_stat 738 clnt_call_private( 739 CLIENT *cl, /* client handle */ 740 struct rpc_callextra *ext, /* call metadata */ 741 rpcproc_t proc, /* procedure number */ 742 xdrproc_t xargs, /* xdr routine for args */ 743 void *argsp, /* pointer to args */ 744 xdrproc_t xresults, /* xdr routine for results */ 745 void *resultsp, /* pointer to results */ 746 struct timeval utimeout) /* seconds to wait before giving up */ 747 { 748 XDR xdrs; 749 struct mbuf *mreq; 750 struct mbuf *mrep; 751 enum clnt_stat stat; 752 753 mreq = m_getcl(M_WAITOK, MT_DATA, 0); 754 755 xdrmbuf_create(&xdrs, mreq, XDR_ENCODE); 756 if (!xargs(&xdrs, argsp)) { 757 m_freem(mreq); 758 return (RPC_CANTENCODEARGS); 759 } 760 XDR_DESTROY(&xdrs); 761 762 stat = CLNT_CALL_MBUF(cl, ext, proc, mreq, &mrep, utimeout); 763 m_freem(mreq); 764 765 if (stat == RPC_SUCCESS) { 766 xdrmbuf_create(&xdrs, mrep, XDR_DECODE); 767 if (!xresults(&xdrs, resultsp)) { 768 XDR_DESTROY(&xdrs); 769 return (RPC_CANTDECODERES); 770 } 771 XDR_DESTROY(&xdrs); 772 } 773 774 return (stat); 775 } 776 777 /* 778 * Bind a socket to a privileged IP port 779 */ 780 int 781 bindresvport(struct socket *so, struct sockaddr *sa) 782 { 783 int old, error, af; 784 bool_t freesa = FALSE; 785 struct sockaddr_in *sin; 786 #ifdef INET6 787 struct sockaddr_in6 *sin6; 788 #endif 789 struct sockopt opt; 790 int proto, portrange, portlow; 791 u_int16_t *portp; 792 socklen_t salen; 793 794 if (sa == NULL) { 795 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 796 if (error) 797 return (error); 798 freesa = TRUE; 799 af = sa->sa_family; 800 salen = sa->sa_len; 801 memset(sa, 0, sa->sa_len); 802 } else { 803 af = sa->sa_family; 804 salen = sa->sa_len; 805 } 806 807 switch (af) { 808 case AF_INET: 809 proto = IPPROTO_IP; 810 portrange = IP_PORTRANGE; 811 portlow = IP_PORTRANGE_LOW; 812 sin = (struct sockaddr_in *)sa; 813 portp = &sin->sin_port; 814 break; 815 #ifdef INET6 816 case AF_INET6: 817 proto = IPPROTO_IPV6; 818 portrange = IPV6_PORTRANGE; 819 portlow = IPV6_PORTRANGE_LOW; 820 sin6 = (struct sockaddr_in6 *)sa; 821 portp = &sin6->sin6_port; 822 break; 823 #endif 824 default: 825 return (EPFNOSUPPORT); 826 } 827 828 sa->sa_family = af; 829 sa->sa_len = salen; 830 831 if (*portp == 0) { 832 bzero(&opt, sizeof(opt)); 833 opt.sopt_dir = SOPT_GET; 834 opt.sopt_level = proto; 835 opt.sopt_name = portrange; 836 opt.sopt_val = &old; 837 opt.sopt_valsize = sizeof(old); 838 error = sogetopt(so, &opt); 839 if (error) { 840 goto out; 841 } 842 843 opt.sopt_dir = SOPT_SET; 844 opt.sopt_val = &portlow; 845 error = sosetopt(so, &opt); 846 if (error) 847 goto out; 848 } 849 850 error = sobind(so, sa, curthread); 851 852 if (*portp == 0) { 853 if (error) { 854 opt.sopt_dir = SOPT_SET; 855 opt.sopt_val = &old; 856 sosetopt(so, &opt); 857 } 858 } 859 out: 860 if (freesa) 861 free(sa, M_SONAME); 862 863 return (error); 864 } 865 866 /* 867 * Kernel module glue 868 */ 869 static int 870 krpc_modevent(module_t mod, int type, void *data) 871 { 872 873 return (0); 874 } 875 static moduledata_t krpc_mod = { 876 "krpc", 877 krpc_modevent, 878 NULL, 879 }; 880 DECLARE_MODULE(krpc, krpc_mod, SI_SUB_VFS, SI_ORDER_ANY); 881 882 /* So that loader and kldload(2) can find us, wherever we are.. */ 883 MODULE_VERSION(krpc, 1); 884