rpc_generic.c revision 92990
1130803Smarcel/* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $ */ 2130803Smarcel 3130803Smarcel/* 4130803Smarcel * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5130803Smarcel * unrestricted use provided that this legend is included on all tape 6130803Smarcel * media and as a part of the software program in whole or part. Users 7130803Smarcel * may copy or modify Sun RPC without charge, but are not authorized 8130803Smarcel * to license or distribute it to anyone else except as part of a product or 9130803Smarcel * program developed by the user. 10130803Smarcel * 11130803Smarcel * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12130803Smarcel * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13130803Smarcel * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14130803Smarcel * 15130803Smarcel * Sun RPC is provided with no support and without any obligation on the 16130803Smarcel * part of Sun Microsystems, Inc. to assist in its use, correction, 17130803Smarcel * modification or enhancement. 18130803Smarcel * 19130803Smarcel * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20130803Smarcel * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21130803Smarcel * OR ANY PART THEREOF. 22130803Smarcel * 23130803Smarcel * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24130803Smarcel * or profits or other special, indirect and consequential damages, even if 25130803Smarcel * Sun has been advised of the possibility of such damages. 26130803Smarcel * 27130803Smarcel * Sun Microsystems, Inc. 28130803Smarcel * 2550 Garcia Avenue 29130803Smarcel * Mountain View, California 94043 30130803Smarcel */ 31130803Smarcel/* 32130803Smarcel * Copyright (c) 1986-1991 by Sun Microsystems Inc. 33130803Smarcel */ 34130803Smarcel 35130803Smarcel/* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */ 36130803Smarcel#include <sys/cdefs.h> 37130803Smarcel__FBSDID("$FreeBSD: head/lib/libc/rpc/rpc_generic.c 92990 2002-03-22 23:18:37Z obrien $"); 38130803Smarcel 39130803Smarcel/* 40130803Smarcel * rpc_generic.c, Miscl routines for RPC. 41130803Smarcel * 42130803Smarcel */ 43130803Smarcel 44130803Smarcel#include "namespace.h" 45130803Smarcel#include "reentrant.h" 46130803Smarcel#include <sys/types.h> 47130803Smarcel#include <sys/param.h> 48130803Smarcel#include <sys/socket.h> 49130803Smarcel#include <sys/time.h> 50130803Smarcel#include <sys/un.h> 51130803Smarcel#include <sys/resource.h> 52130803Smarcel#include <netinet/in.h> 53130803Smarcel#include <arpa/inet.h> 54130803Smarcel#include <rpc/rpc.h> 55130803Smarcel#include <ctype.h> 56130803Smarcel#include <stddef.h> 57130803Smarcel#include <stdio.h> 58130803Smarcel#include <netdb.h> 59130803Smarcel#include <netconfig.h> 60130803Smarcel#include <stdlib.h> 61130803Smarcel#include <string.h> 62130803Smarcel#include <syslog.h> 63130803Smarcel#include <rpc/nettype.h> 64130803Smarcel#include "un-namespace.h" 65130803Smarcel#include "rpc_com.h" 66130803Smarcel 67130803Smarcelstruct handle { 68130803Smarcel NCONF_HANDLE *nhandle; 69130803Smarcel int nflag; /* Whether NETPATH or NETCONFIG */ 70130803Smarcel int nettype; 71130803Smarcel}; 72130803Smarcel 73130803Smarcelstatic const struct _rpcnettype { 74130803Smarcel const char *name; 75130803Smarcel const int type; 76130803Smarcel} _rpctypelist[] = { 77130803Smarcel { "netpath", _RPC_NETPATH }, 78130803Smarcel { "visible", _RPC_VISIBLE }, 79130803Smarcel { "circuit_v", _RPC_CIRCUIT_V }, 80130803Smarcel { "datagram_v", _RPC_DATAGRAM_V }, 81130803Smarcel { "circuit_n", _RPC_CIRCUIT_N }, 82130803Smarcel { "datagram_n", _RPC_DATAGRAM_N }, 83130803Smarcel { "tcp", _RPC_TCP }, 84130803Smarcel { "udp", _RPC_UDP }, 85130803Smarcel { 0, _RPC_NONE } 86130803Smarcel}; 87130803Smarcel 88130803Smarcelstruct netid_af { 89130803Smarcel const char *netid; 90130803Smarcel int af; 91130803Smarcel int protocol; 92130803Smarcel}; 93130803Smarcel 94130803Smarcelstatic const struct netid_af na_cvt[] = { 95130803Smarcel { "udp", AF_INET, IPPROTO_UDP }, 96130803Smarcel { "tcp", AF_INET, IPPROTO_TCP }, 97130803Smarcel#ifdef INET6 98130803Smarcel { "udp6", AF_INET6, IPPROTO_UDP }, 99130803Smarcel { "tcp6", AF_INET6, IPPROTO_TCP }, 100130803Smarcel#endif 101130803Smarcel { "unix", AF_LOCAL, 0 } 102130803Smarcel}; 103130803Smarcel 104130803Smarcel#if 0 105130803Smarcelstatic char *strlocase(char *); 106130803Smarcel#endif 107130803Smarcelstatic int getnettype(const char *); 108130803Smarcel 109130803Smarcel/* 110130803Smarcel * Cache the result of getrlimit(), so we don't have to do an 111130803Smarcel * expensive call every time. 112130803Smarcel */ 113130803Smarcelint 114130803Smarcel__rpc_dtbsize() 115130803Smarcel{ 116130803Smarcel static int tbsize; 117130803Smarcel struct rlimit rl; 118130803Smarcel 119130803Smarcel if (tbsize) { 120130803Smarcel return (tbsize); 121130803Smarcel } 122130803Smarcel if (getrlimit(RLIMIT_NOFILE, &rl) == 0) { 123130803Smarcel return (tbsize = (int)rl.rlim_max); 124130803Smarcel } 125130803Smarcel /* 126130803Smarcel * Something wrong. I'll try to save face by returning a 127130803Smarcel * pessimistic number. 128130803Smarcel */ 129130803Smarcel return (32); 130130803Smarcel} 131130803Smarcel 132130803Smarcel 133130803Smarcel/* 134130803Smarcel * Find the appropriate buffer size 135130803Smarcel */ 136130803Smarcelu_int 137130803Smarcel/*ARGSUSED*/ 138130803Smarcel__rpc_get_t_size(af, proto, size) 139130803Smarcel int af, proto; 140130803Smarcel int size; /* Size requested */ 141130803Smarcel{ 142130803Smarcel int maxsize, defsize; 143130803Smarcel 144130803Smarcel maxsize = 256 * 1024; /* XXX */ 145130803Smarcel switch (proto) { 146130803Smarcel case IPPROTO_TCP: 147130803Smarcel defsize = 64 * 1024; /* XXX */ 148130803Smarcel break; 149130803Smarcel case IPPROTO_UDP: 150130803Smarcel defsize = UDPMSGSIZE; 151130803Smarcel break; 152130803Smarcel default: 153130803Smarcel defsize = RPC_MAXDATASIZE; 154130803Smarcel break; 155130803Smarcel } 156130803Smarcel if (size == 0) 157130803Smarcel return defsize; 158130803Smarcel 159130803Smarcel /* Check whether the value is within the upper max limit */ 160130803Smarcel return (size > maxsize ? (u_int)maxsize : (u_int)size); 161130803Smarcel} 162130803Smarcel 163130803Smarcel/* 164130803Smarcel * Find the appropriate address buffer size 165130803Smarcel */ 166130803Smarcelu_int 167130803Smarcel__rpc_get_a_size(af) 168130803Smarcel int af; 169130803Smarcel{ 170130803Smarcel switch (af) { 171130803Smarcel case AF_INET: 172130803Smarcel return sizeof (struct sockaddr_in); 173130803Smarcel#ifdef INET6 174130803Smarcel case AF_INET6: 175130803Smarcel return sizeof (struct sockaddr_in6); 176130803Smarcel#endif 177130803Smarcel case AF_LOCAL: 178130803Smarcel return sizeof (struct sockaddr_un); 179130803Smarcel default: 180130803Smarcel break; 181130803Smarcel } 182130803Smarcel return ((u_int)RPC_MAXADDRSIZE); 183130803Smarcel} 184130803Smarcel 185130803Smarcel#if 0 186130803Smarcelstatic char * 187130803Smarcelstrlocase(p) 188130803Smarcel char *p; 189130803Smarcel{ 190130803Smarcel char *t = p; 191130803Smarcel 192130803Smarcel for (; *p; p++) 193130803Smarcel if (isupper(*p)) 194130803Smarcel *p = tolower(*p); 195130803Smarcel return (t); 196130803Smarcel} 197130803Smarcel#endif 198130803Smarcel 199130803Smarcel/* 200130803Smarcel * Returns the type of the network as defined in <rpc/nettype.h> 201130803Smarcel * If nettype is NULL, it defaults to NETPATH. 202130803Smarcel */ 203130803Smarcelstatic int 204130803Smarcelgetnettype(nettype) 205130803Smarcel const char *nettype; 206130803Smarcel{ 207130803Smarcel int i; 208130803Smarcel 209130803Smarcel if ((nettype == NULL) || (nettype[0] == NULL)) { 210130803Smarcel return (_RPC_NETPATH); /* Default */ 211130803Smarcel } 212130803Smarcel 213130803Smarcel#if 0 214130803Smarcel nettype = strlocase(nettype); 215130803Smarcel#endif 216130803Smarcel for (i = 0; _rpctypelist[i].name; i++) 217130803Smarcel if (strcasecmp(nettype, _rpctypelist[i].name) == 0) { 218130803Smarcel return (_rpctypelist[i].type); 219130803Smarcel } 220130803Smarcel return (_rpctypelist[i].type); 221130803Smarcel} 222130803Smarcel 223/* 224 * For the given nettype (tcp or udp only), return the first structure found. 225 * This should be freed by calling freenetconfigent() 226 */ 227struct netconfig * 228__rpc_getconfip(nettype) 229 const char *nettype; 230{ 231 char *netid; 232 char *netid_tcp = (char *) NULL; 233 char *netid_udp = (char *) NULL; 234 static char *netid_tcp_main; 235 static char *netid_udp_main; 236 struct netconfig *dummy; 237 int main_thread; 238 static thread_key_t tcp_key, udp_key; 239 extern mutex_t tsd_lock; 240 241 if ((main_thread = thr_main())) { 242 netid_udp = netid_udp_main; 243 netid_tcp = netid_tcp_main; 244 } else { 245 if (tcp_key == 0) { 246 mutex_lock(&tsd_lock); 247 if (tcp_key == 0) 248 thr_keycreate(&tcp_key, free); 249 mutex_unlock(&tsd_lock); 250 } 251 netid_tcp = (char *)thr_getspecific(tcp_key); 252 if (udp_key == 0) { 253 mutex_lock(&tsd_lock); 254 if (udp_key == 0) 255 thr_keycreate(&udp_key, free); 256 mutex_unlock(&tsd_lock); 257 } 258 netid_udp = (char *)thr_getspecific(udp_key); 259 } 260 if (!netid_udp && !netid_tcp) { 261 struct netconfig *nconf; 262 void *confighandle; 263 264 if (!(confighandle = setnetconfig())) { 265 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 266 return (NULL); 267 } 268 while ((nconf = getnetconfig(confighandle)) != NULL) { 269 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) { 270 if (strcmp(nconf->nc_proto, NC_TCP) == 0) { 271 netid_tcp = strdup(nconf->nc_netid); 272 if (main_thread) 273 netid_tcp_main = netid_tcp; 274 else 275 thr_setspecific(tcp_key, 276 (void *) netid_tcp); 277 } else 278 if (strcmp(nconf->nc_proto, NC_UDP) == 0) { 279 netid_udp = strdup(nconf->nc_netid); 280 if (main_thread) 281 netid_udp_main = netid_udp; 282 else 283 thr_setspecific(udp_key, 284 (void *) netid_udp); 285 } 286 } 287 } 288 endnetconfig(confighandle); 289 } 290 if (strcmp(nettype, "udp") == 0) 291 netid = netid_udp; 292 else if (strcmp(nettype, "tcp") == 0) 293 netid = netid_tcp; 294 else { 295 return (NULL); 296 } 297 if ((netid == NULL) || (netid[0] == NULL)) { 298 return (NULL); 299 } 300 dummy = getnetconfigent(netid); 301 return (dummy); 302} 303 304/* 305 * Returns the type of the nettype, which should then be used with 306 * __rpc_getconf(). 307 */ 308void * 309__rpc_setconf(nettype) 310 const char *nettype; 311{ 312 struct handle *handle; 313 314 handle = (struct handle *) malloc(sizeof (struct handle)); 315 if (handle == NULL) { 316 return (NULL); 317 } 318 switch (handle->nettype = getnettype(nettype)) { 319 case _RPC_NETPATH: 320 case _RPC_CIRCUIT_N: 321 case _RPC_DATAGRAM_N: 322 if (!(handle->nhandle = setnetpath())) { 323 free(handle); 324 return (NULL); 325 } 326 handle->nflag = TRUE; 327 break; 328 case _RPC_VISIBLE: 329 case _RPC_CIRCUIT_V: 330 case _RPC_DATAGRAM_V: 331 case _RPC_TCP: 332 case _RPC_UDP: 333 if (!(handle->nhandle = setnetconfig())) { 334 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG); 335 free(handle); 336 return (NULL); 337 } 338 handle->nflag = FALSE; 339 break; 340 default: 341 return (NULL); 342 } 343 344 return (handle); 345} 346 347/* 348 * Returns the next netconfig struct for the given "net" type. 349 * __rpc_setconf() should have been called previously. 350 */ 351struct netconfig * 352__rpc_getconf(vhandle) 353 void *vhandle; 354{ 355 struct handle *handle; 356 struct netconfig *nconf; 357 358 handle = (struct handle *)vhandle; 359 if (handle == NULL) { 360 return (NULL); 361 } 362 for (;;) { 363 if (handle->nflag) 364 nconf = getnetpath(handle->nhandle); 365 else 366 nconf = getnetconfig(handle->nhandle); 367 if (nconf == NULL) 368 break; 369 if ((nconf->nc_semantics != NC_TPI_CLTS) && 370 (nconf->nc_semantics != NC_TPI_COTS) && 371 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 372 continue; 373 switch (handle->nettype) { 374 case _RPC_VISIBLE: 375 if (!(nconf->nc_flag & NC_VISIBLE)) 376 continue; 377 /* FALLTHROUGH */ 378 case _RPC_NETPATH: /* Be happy */ 379 break; 380 case _RPC_CIRCUIT_V: 381 if (!(nconf->nc_flag & NC_VISIBLE)) 382 continue; 383 /* FALLTHROUGH */ 384 case _RPC_CIRCUIT_N: 385 if ((nconf->nc_semantics != NC_TPI_COTS) && 386 (nconf->nc_semantics != NC_TPI_COTS_ORD)) 387 continue; 388 break; 389 case _RPC_DATAGRAM_V: 390 if (!(nconf->nc_flag & NC_VISIBLE)) 391 continue; 392 /* FALLTHROUGH */ 393 case _RPC_DATAGRAM_N: 394 if (nconf->nc_semantics != NC_TPI_CLTS) 395 continue; 396 break; 397 case _RPC_TCP: 398 if (((nconf->nc_semantics != NC_TPI_COTS) && 399 (nconf->nc_semantics != NC_TPI_COTS_ORD)) || 400 (strcmp(nconf->nc_protofmly, NC_INET) 401#ifdef INET6 402 && strcmp(nconf->nc_protofmly, NC_INET6)) 403#else 404 ) 405#endif 406 || 407 strcmp(nconf->nc_proto, NC_TCP)) 408 continue; 409 break; 410 case _RPC_UDP: 411 if ((nconf->nc_semantics != NC_TPI_CLTS) || 412 (strcmp(nconf->nc_protofmly, NC_INET) 413#ifdef INET6 414 && strcmp(nconf->nc_protofmly, NC_INET6)) 415#else 416 ) 417#endif 418 || 419 strcmp(nconf->nc_proto, NC_UDP)) 420 continue; 421 break; 422 } 423 break; 424 } 425 return (nconf); 426} 427 428void 429__rpc_endconf(vhandle) 430 void * vhandle; 431{ 432 struct handle *handle; 433 434 handle = (struct handle *) vhandle; 435 if (handle == NULL) { 436 return; 437 } 438 if (handle->nflag) { 439 endnetpath(handle->nhandle); 440 } else { 441 endnetconfig(handle->nhandle); 442 } 443 free(handle); 444} 445 446/* 447 * Used to ping the NULL procedure for clnt handle. 448 * Returns NULL if fails, else a non-NULL pointer. 449 */ 450void * 451rpc_nullproc(clnt) 452 CLIENT *clnt; 453{ 454 struct timeval TIMEOUT = {25, 0}; 455 456 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL, 457 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) { 458 return (NULL); 459 } 460 return ((void *) clnt); 461} 462 463/* 464 * Try all possible transports until 465 * one succeeds in finding the netconf for the given fd. 466 */ 467struct netconfig * 468__rpcgettp(fd) 469 int fd; 470{ 471 const char *netid; 472 struct __rpc_sockinfo si; 473 474 if (!__rpc_fd2sockinfo(fd, &si)) 475 return NULL; 476 477 if (!__rpc_sockinfo2netid(&si, &netid)) 478 return NULL; 479 480 /*LINTED const castaway*/ 481 return getnetconfigent((char *)netid); 482} 483 484int 485__rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip) 486{ 487 socklen_t len; 488 int type, proto; 489 struct sockaddr_storage ss; 490 491 len = sizeof ss; 492 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0) 493 return 0; 494 sip->si_alen = len; 495 496 len = sizeof type; 497 if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0) 498 return 0; 499 500 /* XXX */ 501 if (ss.ss_family != AF_LOCAL) { 502 if (type == SOCK_STREAM) 503 proto = IPPROTO_TCP; 504 else if (type == SOCK_DGRAM) 505 proto = IPPROTO_UDP; 506 else 507 return 0; 508 } else 509 proto = 0; 510 511 sip->si_af = ss.ss_family; 512 sip->si_proto = proto; 513 sip->si_socktype = type; 514 515 return 1; 516} 517 518/* 519 * Linear search, but the number of entries is small. 520 */ 521int 522__rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip) 523{ 524 int i; 525 526 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) 527 if (!strcmp(na_cvt[i].netid, nconf->nc_netid)) { 528 sip->si_af = na_cvt[i].af; 529 sip->si_proto = na_cvt[i].protocol; 530 sip->si_socktype = 531 __rpc_seman2socktype((int)nconf->nc_semantics); 532 if (sip->si_socktype == -1) 533 return 0; 534 sip->si_alen = __rpc_get_a_size(sip->si_af); 535 return 1; 536 } 537 538 return 0; 539} 540 541int 542__rpc_nconf2fd(const struct netconfig *nconf) 543{ 544 struct __rpc_sockinfo si; 545 546 if (!__rpc_nconf2sockinfo(nconf, &si)) 547 return 0; 548 549 return _socket(si.si_af, si.si_socktype, si.si_proto); 550} 551 552int 553__rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid) 554{ 555 int i; 556 557 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) 558 if (na_cvt[i].af == sip->si_af && 559 na_cvt[i].protocol == sip->si_proto) { 560 if (netid) 561 *netid = na_cvt[i].netid; 562 return 1; 563 } 564 565 return 0; 566} 567 568char * 569taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf) 570{ 571 struct __rpc_sockinfo si; 572 573 if (!__rpc_nconf2sockinfo(nconf, &si)) 574 return NULL; 575 return __rpc_taddr2uaddr_af(si.si_af, nbuf); 576} 577 578struct netbuf * 579uaddr2taddr(const struct netconfig *nconf, const char *uaddr) 580{ 581 struct __rpc_sockinfo si; 582 583 if (!__rpc_nconf2sockinfo(nconf, &si)) 584 return NULL; 585 return __rpc_uaddr2taddr_af(si.si_af, uaddr); 586} 587 588char * 589__rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf) 590{ 591 char *ret; 592 struct sockaddr_in *sin; 593 struct sockaddr_un *sun; 594 char namebuf[INET_ADDRSTRLEN]; 595#ifdef INET6 596 struct sockaddr_in6 *sin6; 597 char namebuf6[INET6_ADDRSTRLEN]; 598#endif 599 u_int16_t port; 600 601 switch (af) { 602 case AF_INET: 603 sin = nbuf->buf; 604 if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf) 605 == NULL) 606 return NULL; 607 port = ntohs(sin->sin_port); 608 if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8, 609 port & 0xff) < 0) 610 return NULL; 611 break; 612#ifdef INET6 613 case AF_INET6: 614 sin6 = nbuf->buf; 615 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6) 616 == NULL) 617 return NULL; 618 port = ntohs(sin6->sin6_port); 619 if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8, 620 port & 0xff) < 0) 621 return NULL; 622 break; 623#endif 624 case AF_LOCAL: 625 sun = nbuf->buf; 626 if (asprintf(&ret, "%.*s", (int)(sun->sun_len - 627 offsetof(struct sockaddr_un, sun_path)), 628 sun->sun_path) < 0) 629 return (NULL); 630 break; 631 default: 632 return NULL; 633 } 634 635 return ret; 636} 637 638struct netbuf * 639__rpc_uaddr2taddr_af(int af, const char *uaddr) 640{ 641 struct netbuf *ret = NULL; 642 char *addrstr, *p; 643 unsigned port, portlo, porthi; 644 struct sockaddr_in *sin; 645#ifdef INET6 646 struct sockaddr_in6 *sin6; 647#endif 648 struct sockaddr_un *sun; 649 650 port = 0; 651 sin = NULL; 652 addrstr = strdup(uaddr); 653 if (addrstr == NULL) 654 return NULL; 655 656 /* 657 * AF_LOCAL addresses are expected to be absolute 658 * pathnames, anything else will be AF_INET or AF_INET6. 659 */ 660 if (*addrstr != '/') { 661 p = strrchr(addrstr, '.'); 662 if (p == NULL) 663 goto out; 664 portlo = (unsigned)atoi(p + 1); 665 *p = '\0'; 666 667 p = strrchr(addrstr, '.'); 668 if (p == NULL) 669 goto out; 670 porthi = (unsigned)atoi(p + 1); 671 *p = '\0'; 672 port = (porthi << 8) | portlo; 673 } 674 675 ret = (struct netbuf *)malloc(sizeof *ret); 676 677 switch (af) { 678 case AF_INET: 679 sin = (struct sockaddr_in *)malloc(sizeof *sin); 680 if (sin == NULL) 681 goto out; 682 memset(sin, 0, sizeof *sin); 683 sin->sin_family = AF_INET; 684 sin->sin_port = htons(port); 685 if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) { 686 free(sin); 687 free(ret); 688 ret = NULL; 689 goto out; 690 } 691 sin->sin_len = ret->maxlen = ret->len = sizeof *sin; 692 ret->buf = sin; 693 break; 694#ifdef INET6 695 case AF_INET6: 696 sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6); 697 if (sin6 == NULL) 698 goto out; 699 memset(sin6, 0, sizeof *sin6); 700 sin6->sin6_family = AF_INET6; 701 sin6->sin6_port = htons(port); 702 if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) { 703 free(sin); 704 free(ret); 705 ret = NULL; 706 goto out; 707 } 708 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6; 709 ret->buf = sin6; 710 break; 711#endif 712 case AF_LOCAL: 713 sun = (struct sockaddr_un *)malloc(sizeof *sun); 714 if (sun == NULL) 715 goto out; 716 memset(sun, 0, sizeof *sun); 717 sun->sun_family = AF_LOCAL; 718 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1); 719 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun); 720 ret->buf = sun; 721 break; 722 default: 723 break; 724 } 725out: 726 free(addrstr); 727 return ret; 728} 729 730int 731__rpc_seman2socktype(int semantics) 732{ 733 switch (semantics) { 734 case NC_TPI_CLTS: 735 return SOCK_DGRAM; 736 case NC_TPI_COTS_ORD: 737 return SOCK_STREAM; 738 case NC_TPI_RAW: 739 return SOCK_RAW; 740 default: 741 break; 742 } 743 744 return -1; 745} 746 747int 748__rpc_socktype2seman(int socktype) 749{ 750 switch (socktype) { 751 case SOCK_DGRAM: 752 return NC_TPI_CLTS; 753 case SOCK_STREAM: 754 return NC_TPI_COTS_ORD; 755 case SOCK_RAW: 756 return NC_TPI_RAW; 757 default: 758 break; 759 } 760 761 return -1; 762} 763 764/* 765 * XXXX - IPv6 scope IDs can't be handled in universal addresses. 766 * Here, we compare the original server address to that of the RPC 767 * service we just received back from a call to rpcbind on the remote 768 * machine. If they are both "link local" or "site local", copy 769 * the scope id of the server address over to the service address. 770 */ 771int 772__rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc) 773{ 774#ifdef INET6 775 struct sockaddr *sa_new, *sa_svc; 776 struct sockaddr_in6 *sin6_new, *sin6_svc; 777 778 sa_svc = (struct sockaddr *)svc->buf; 779 sa_new = (struct sockaddr *)new->buf; 780 781 if (sa_new->sa_family == sa_svc->sa_family && 782 sa_new->sa_family == AF_INET6) { 783 sin6_new = (struct sockaddr_in6 *)new->buf; 784 sin6_svc = (struct sockaddr_in6 *)svc->buf; 785 786 if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) && 787 IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) || 788 (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) && 789 IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) { 790 sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id; 791 } 792 } 793#endif 794 return 1; 795} 796 797int 798__rpc_sockisbound(int fd) 799{ 800 struct sockaddr_storage ss; 801 socklen_t slen; 802 803 slen = sizeof (struct sockaddr_storage); 804 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0) 805 return 0; 806 807 switch (ss.ss_family) { 808 case AF_INET: 809 return (((struct sockaddr_in *) 810 (void *)&ss)->sin_port != 0); 811#ifdef INET6 812 case AF_INET6: 813 return (((struct sockaddr_in6 *) 814 (void *)&ss)->sin6_port != 0); 815#endif 816 case AF_LOCAL: 817 /* XXX check this */ 818 return (((struct sockaddr_un *) 819 (void *)&ss)->sun_path[0] != '\0'); 820 default: 821 break; 822 } 823 824 return 0; 825} 826