1/* $NetBSD: rpcb_svc_com.c,v 1.15 2011/08/31 13:32:40 joerg 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/* #ident "@(#)rpcb_svc_com.c 1.18 94/05/02 SMI" */ 36 37/* 38 * rpcb_svc_com.c 39 * The commom server procedure for the rpcbind. 40 */ 41 42#include <sys/types.h> 43#include <sys/stat.h> 44#include <sys/param.h> 45#include <sys/socket.h> 46#include <rpc/rpc.h> 47#include <rpc/rpcb_prot.h> 48#include <netconfig.h> 49#include <errno.h> 50#include <syslog.h> 51#include <unistd.h> 52#include <stdio.h> 53#include <poll.h> 54#ifdef PORTMAP 55#include <netinet/in.h> 56#include <rpc/pmap_prot.h> 57#endif /* PORTMAP */ 58#include <string.h> 59#include <stdlib.h> 60 61#include "rpcbind.h" 62#include "svc_dg.h" 63 64#define RPC_BUF_MAX 65536 /* can be raised if required */ 65 66static char emptystring[] = ""; 67static int rpcb_rmtcalls; 68 69struct rmtcallfd_list { 70 int fd; 71 SVCXPRT *xprt; 72 char *netid; 73 struct rmtcallfd_list *next; 74}; 75 76#define NFORWARD 64 77#define MAXTIME_OFF 300 /* 5 minutes */ 78 79struct finfo { 80 int flag; 81#define FINFO_ACTIVE 0x1 82 u_int32_t caller_xid; 83 struct netbuf *caller_addr; 84 u_int32_t forward_xid; 85 int forward_fd; 86 char *uaddr; 87 rpcproc_t reply_type; 88 rpcvers_t versnum; 89 time_t time; 90}; 91static struct finfo FINFO[NFORWARD]; 92 93 94static bool_t xdr_encap_parms(XDR *, struct encap_parms *); 95static bool_t xdr_rmtcall_args(XDR *, struct r_rmtcall_args *); 96static bool_t xdr_rmtcall_result(XDR *, struct r_rmtcall_args *); 97static bool_t xdr_opaque_parms(XDR *, struct r_rmtcall_args *); 98static int find_rmtcallfd_by_netid(char *); 99static SVCXPRT *find_rmtcallxprt_by_fd(int); 100static u_int32_t forward_register(u_int32_t, struct netbuf *, int, char *, 101 rpcproc_t, rpcvers_t); 102static struct finfo *forward_find(u_int32_t); 103static int free_slot_by_xid(u_int32_t); 104static int free_slot_by_index(int); 105static int netbufcmp(struct netbuf *, struct netbuf *); 106static struct netbuf *netbufdup(struct netbuf *); 107static void netbuffree(struct netbuf *); 108static int check_rmtcalls(struct pollfd *, int); 109static void xprt_set_caller(SVCXPRT *, struct finfo *); 110static void send_svcsyserr(SVCXPRT *, struct finfo *); 111static void handle_reply(int, SVCXPRT *); 112static void find_versions(rpcprog_t, char *, rpcvers_t *, rpcvers_t *); 113static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *); 114static char *getowner(SVCXPRT *, char *, size_t); 115static int add_pmaplist(RPCB *); 116static int del_pmaplist(RPCB *); 117 118/* 119 * Set a mapping of program, version, netid 120 */ 121/* ARGSUSED */ 122void * 123rpcbproc_set_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 124 rpcvers_t rpcbversnum) 125{ 126 RPCB *regp = (RPCB *)arg; 127 static bool_t ans; 128 char owner[64]; 129 130#ifdef RPCBIND_DEBUG 131 if (debugging) 132 fprintf(stderr, "RPCB_SET request for (%lu, %lu, %s, %s) : ", 133 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 134 regp->r_netid, regp->r_addr); 135#endif 136 ans = map_set(regp, getowner(transp, owner, sizeof owner)); 137#ifdef RPCBIND_DEBUG 138 if (debugging) 139 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 140#endif 141 /* XXX: should have used some defined constant here */ 142 rpcbs_set(rpcbversnum - 2, ans); 143 return (void *)&ans; 144} 145 146bool_t 147map_set(RPCB *regp, char *owner) 148{ 149 RPCB reg, *a; 150 rpcblist_ptr rbl, fnd; 151 152 reg = *regp; 153 /* 154 * check to see if already used 155 * find_service returns a hit even if 156 * the versions don't match, so check for it 157 */ 158 fnd = find_service(reg.r_prog, reg.r_vers, reg.r_netid); 159 if (fnd && (fnd->rpcb_map.r_vers == reg.r_vers)) { 160 if (!strcmp(fnd->rpcb_map.r_addr, reg.r_addr)) 161 /* 162 * if these match then it is already 163 * registered so just say "OK". 164 */ 165 return (TRUE); 166 else 167 return (FALSE); 168 } 169 /* 170 * add to the end of the list 171 */ 172 rbl = (rpcblist_ptr) malloc((u_int)sizeof (RPCBLIST)); 173 if (rbl == NULL) { 174 return (FALSE); 175 } 176 a = &(rbl->rpcb_map); 177 a->r_prog = reg.r_prog; 178 a->r_vers = reg.r_vers; 179 a->r_netid = strdup(reg.r_netid); 180 a->r_addr = strdup(reg.r_addr); 181 a->r_owner = strdup(owner); 182 if (!a->r_addr || !a->r_netid || !a->r_owner) { 183 if (a->r_netid) 184 free((void *) a->r_netid); 185 if (a->r_addr) 186 free((void *) a->r_addr); 187 if (a->r_owner) 188 free((void *) a->r_owner); 189 free((void *)rbl); 190 return (FALSE); 191 } 192 rbl->rpcb_next = NULL; 193 if (list_rbl == NULL) { 194 list_rbl = rbl; 195 } else { 196 for (fnd = list_rbl; fnd->rpcb_next; 197 fnd = fnd->rpcb_next) 198 ; 199 fnd->rpcb_next = rbl; 200 } 201#ifdef PORTMAP 202 (void) add_pmaplist(regp); 203#endif 204 return (TRUE); 205} 206 207/* 208 * Unset a mapping of program, version, netid 209 */ 210/* ARGSUSED */ 211void * 212rpcbproc_unset_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 213 rpcvers_t rpcbversnum) 214{ 215 RPCB *regp = (RPCB *)arg; 216 static bool_t ans; 217 char owner[64]; 218 219#ifdef RPCBIND_DEBUG 220 if (debugging) 221 fprintf(stderr, "RPCB_UNSET request for (%lu, %lu, %s) : ", 222 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers, 223 regp->r_netid); 224#endif 225 ans = map_unset(regp, getowner(transp, owner, sizeof owner)); 226#ifdef RPCBIND_DEBUG 227 if (debugging) 228 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed"); 229#endif 230 /* XXX: should have used some defined constant here */ 231 rpcbs_unset(rpcbversnum - 2, ans); 232 return (void *)&ans; 233} 234 235bool_t 236map_unset(RPCB *regp, const char *owner) 237{ 238 int ans = 0; 239 rpcblist_ptr rbl, prev, tmp; 240 241 if (owner == NULL) 242 return (0); 243 244 for (prev = NULL, rbl = list_rbl; rbl; /* cstyle */) { 245 if ((rbl->rpcb_map.r_prog != regp->r_prog) || 246 (rbl->rpcb_map.r_vers != regp->r_vers) || 247 (regp->r_netid[0] && strcasecmp(regp->r_netid, 248 rbl->rpcb_map.r_netid))) { 249 /* both rbl & prev move forwards */ 250 prev = rbl; 251 rbl = rbl->rpcb_next; 252 continue; 253 } 254 /* 255 * Check whether appropriate uid. Unset only 256 * if superuser or the owner itself. 257 */ 258 if (strcmp(owner, rpcbind_superuser) && 259 strcmp(rbl->rpcb_map.r_owner, owner)) 260 return (0); 261 /* found it; rbl moves forward, prev stays */ 262 ans = 1; 263 tmp = rbl; 264 rbl = rbl->rpcb_next; 265 if (prev == NULL) 266 list_rbl = rbl; 267 else 268 prev->rpcb_next = rbl; 269 free((void *) tmp->rpcb_map.r_addr); 270 free((void *) tmp->rpcb_map.r_netid); 271 free((void *) tmp->rpcb_map.r_owner); 272 free((void *) tmp); 273 } 274#ifdef PORTMAP 275 if (ans) 276 (void) del_pmaplist(regp); 277#endif 278 /* 279 * We return 1 either when the entry was not there or it 280 * was able to unset it. It can come to this point only if 281 * atleast one of the conditions is true. 282 */ 283 return (1); 284} 285 286void 287delete_prog(rpcprog_t prog) 288{ 289 RPCB reg; 290 register rpcblist_ptr rbl; 291 292 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 293 if ((rbl->rpcb_map.r_prog != prog)) 294 continue; 295 if (is_bound(rbl->rpcb_map.r_netid, rbl->rpcb_map.r_addr)) 296 continue; 297 reg.r_prog = rbl->rpcb_map.r_prog; 298 reg.r_vers = rbl->rpcb_map.r_vers; 299 reg.r_netid = strdup(rbl->rpcb_map.r_netid); 300 (void)map_unset(®, rpcbind_superuser); 301 free(reg.r_netid); 302 } 303} 304 305void * 306rpcbproc_getaddr_com(RPCB *regp, struct svc_req *rqstp, SVCXPRT *transp, 307 rpcvers_t rpcbversnum, rpcvers_t verstype) 308{ 309 static char *uaddr; 310 char *saddr = NULL; 311 rpcblist_ptr fnd; 312 313 if (uaddr && uaddr[0]) 314 free((void *) uaddr); 315 fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid); 316 if (fnd && ((verstype == RPCB_ALLVERS) || 317 (regp->r_vers == fnd->rpcb_map.r_vers))) { 318 if (*(regp->r_addr) != '\0') { /* may contain a hint about */ 319 saddr = regp->r_addr; /* the interface that we */ 320 } /* should use */ 321 if (!(uaddr = mergeaddr(transp, transp->xp_netid, 322 fnd->rpcb_map.r_addr, saddr))) { 323 /* Try whatever we have */ 324 uaddr = strdup(fnd->rpcb_map.r_addr); 325 } else if (!uaddr[0]) { 326 /* 327 * The server died. Unset all versions of this prog. 328 */ 329 delete_prog(regp->r_prog); 330 uaddr = emptystring; 331 } 332 } else { 333 uaddr = emptystring; 334 } 335#ifdef RPCBIND_DEBUG 336 if (debugging) 337 fprintf(stderr, "getaddr: %s\n", uaddr); 338#endif 339 /* XXX: should have used some defined constant here */ 340 rpcbs_getaddr(rpcbversnum - 2, regp->r_prog, regp->r_vers, 341 transp->xp_netid, uaddr); 342 return (void *)&uaddr; 343} 344 345/* ARGSUSED */ 346void * 347rpcbproc_gettime_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 348 rpcvers_t rpcbversnum) 349{ 350 static time_t curtime; 351 352 (void) time(&curtime); 353 return (void *)&curtime; 354} 355 356/* 357 * Convert uaddr to taddr. Should be used only by 358 * local servers/clients. (kernel level stuff only) 359 */ 360/* ARGSUSED */ 361void * 362rpcbproc_uaddr2taddr_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 363 rpcvers_t rpcbversnum) 364{ 365 char **uaddrp = (char **)arg; 366 struct netconfig *nconf; 367 static struct netbuf nbuf; 368 static struct netbuf *taddr; 369 370 if (taddr) { 371 free((void *) taddr->buf); 372 free((void *) taddr); 373 } 374 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) || 375 ((taddr = uaddr2taddr(nconf, *uaddrp)) == NULL)) { 376 (void) memset((char *)&nbuf, 0, sizeof (struct netbuf)); 377 return (void *)&nbuf; 378 } 379 return (void *)taddr; 380} 381 382/* 383 * Convert taddr to uaddr. Should be used only by 384 * local servers/clients. (kernel level stuff only) 385 */ 386/* ARGSUSED */ 387void * 388rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp, 389 rpcvers_t rpcbversnum) 390{ 391 struct netbuf *taddr = (struct netbuf *)arg; 392 static char *uaddr; 393 struct netconfig *nconf; 394 395#ifdef CHEW_FDS 396 int fd; 397 398 if ((fd = open("/dev/null", O_RDONLY)) == -1) { 399 uaddr = strerror(errno); 400 return (&uaddr); 401 } 402#endif /* CHEW_FDS */ 403 if (uaddr && !uaddr[0]) 404 free((void *) uaddr); 405 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) || 406 ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) { 407 uaddr = emptystring; 408 } 409 return (void *)&uaddr; 410} 411 412 413static bool_t 414xdr_encap_parms(XDR *xdrs, struct encap_parms *epp) 415{ 416 return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), ~0)); 417} 418 419/* 420 * XDR remote call arguments. It ignores the address part. 421 * written for XDR_DECODE direction only 422 */ 423static bool_t 424xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap) 425{ 426 /* does not get the address or the arguments */ 427 if (xdr_u_int32_t(xdrs, &(cap->rmt_prog)) && 428 xdr_u_int32_t(xdrs, &(cap->rmt_vers)) && 429 xdr_u_int32_t(xdrs, &(cap->rmt_proc))) { 430 return (xdr_encap_parms(xdrs, &(cap->rmt_args))); 431 } 432 return (FALSE); 433} 434 435/* 436 * XDR remote call results along with the address. Ignore 437 * program number, version number and proc number. 438 * Written for XDR_ENCODE direction only. 439 */ 440static bool_t 441xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap) 442{ 443 bool_t result; 444 445#ifdef PORTMAP 446 if (cap->rmt_localvers == PMAPVERS) { 447 int h1, h2, h3, h4, p1, p2; 448 u_long port; 449 450 /* interpret the universal address for TCP/IP */ 451 if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d", 452 &h1, &h2, &h3, &h4, &p1, &p2) != 6) 453 return (FALSE); 454 port = ((p1 & 0xff) << 8) + (p2 & 0xff); 455 result = xdr_u_long(xdrs, &port); 456 } else 457#endif 458 if ((cap->rmt_localvers == RPCBVERS) || 459 (cap->rmt_localvers == RPCBVERS4)) { 460 result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr)); 461 } else { 462 return (FALSE); 463 } 464 if (result == TRUE) 465 return (xdr_encap_parms(xdrs, &(cap->rmt_args))); 466 return (FALSE); 467} 468 469/* 470 * only worries about the struct encap_parms part of struct r_rmtcall_args. 471 * The arglen must already be set!! 472 */ 473static bool_t 474xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap) 475{ 476 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen)); 477} 478 479static struct rmtcallfd_list *rmthead; 480static struct rmtcallfd_list *rmttail; 481 482int 483create_rmtcall_fd(struct netconfig *nconf) 484{ 485 int fd; 486 struct rmtcallfd_list *rmt; 487 SVCXPRT *xprt; 488 489 if ((fd = __rpc_nconf2fd(nconf)) == -1) { 490 if (debugging) 491 fprintf(stderr, 492 "create_rmtcall_fd: couldn't open \"%s\" (errno %d)\n", 493 nconf->nc_device, errno); 494 return (-1); 495 } 496 xprt = svc_tli_create(fd, 0, (struct t_bind *) 0, 0, 0); 497 if (xprt == NULL) { 498 if (debugging) 499 fprintf(stderr, 500 "create_rmtcall_fd: svc_tli_create failed\n"); 501 return (-1); 502 } 503 rmt = (struct rmtcallfd_list *)malloc((u_int) 504 sizeof (struct rmtcallfd_list)); 505 if (rmt == NULL) { 506 syslog(LOG_ERR, "create_rmtcall_fd: no memory!"); 507 return (-1); 508 } 509 rmt->xprt = xprt; 510 rmt->netid = strdup(nconf->nc_netid); 511 xprt->xp_netid = rmt->netid; 512 rmt->fd = fd; 513 rmt->next = NULL; 514 if (rmthead == NULL) { 515 rmthead = rmt; 516 rmttail = rmt; 517 } else { 518 rmttail->next = rmt; 519 rmttail = rmt; 520 } 521 /* XXX not threadsafe */ 522 if (fd > svc_maxfd) 523 svc_maxfd = fd; 524 FD_SET(fd, &svc_fdset); 525 return (fd); 526} 527 528static int 529find_rmtcallfd_by_netid(char *netid) 530{ 531 struct rmtcallfd_list *rmt; 532 533 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) { 534 if (strcmp(netid, rmt->netid) == 0) { 535 return (rmt->fd); 536 } 537 } 538 return (-1); 539} 540 541static SVCXPRT * 542find_rmtcallxprt_by_fd(int fd) 543{ 544 struct rmtcallfd_list *rmt; 545 546 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) { 547 if (fd == rmt->fd) { 548 return (rmt->xprt); 549 } 550 } 551 return (NULL); 552} 553 554 555/* 556 * Call a remote procedure service. This procedure is very quiet when things 557 * go wrong. The proc is written to support broadcast rpc. In the broadcast 558 * case, a machine should shut-up instead of complain, lest the requestor be 559 * overrun with complaints at the expense of not hearing a valid reply. 560 * When receiving a request and verifying that the service exists, we 561 * 562 * receive the request 563 * 564 * open a new TLI endpoint on the same transport on which we received 565 * the original request 566 * 567 * remember the original request's XID (which requires knowing the format 568 * of the svc_dg_data structure) 569 * 570 * forward the request, with a new XID, to the requested service, 571 * remembering the XID used to send this request (for later use in 572 * reassociating the answer with the original request), the requestor's 573 * address, the file descriptor on which the forwarded request is 574 * made and the service's address. 575 * 576 * mark the file descriptor on which we anticipate receiving a reply from 577 * the service and one to select for in our private svc_run procedure 578 * 579 * At some time in the future, a reply will be received from the service to 580 * which we forwarded the request. At that time, we detect that the socket 581 * used was for forwarding (by looking through the finfo structures to see 582 * whether the fd corresponds to one of those) and call handle_reply() to 583 * 584 * receive the reply 585 * 586 * bundle the reply, along with the service's universal address 587 * 588 * create a SVCXPRT structure and use a version of svc_sendreply 589 * that allows us to specify the reply XID and destination, send the reply 590 * to the original requestor. 591 */ 592 593void 594rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp, 595 rpcproc_t reply_type, rpcvers_t versnum) 596{ 597 register rpcblist_ptr rbl; 598 struct netconfig *nconf; 599 struct netbuf *caller; 600 struct r_rmtcall_args a; 601 char *buf_alloc = NULL, *outbufp; 602 char *outbuf_alloc = NULL; 603 char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX]; 604 struct netbuf *na = NULL; 605 struct rpc_msg call_msg; 606 int outlen; 607 u_int sendsz; 608 XDR outxdr; 609 AUTH *auth; 610 int fd = -1; 611 char *uaddr, *m_uaddr, *local_uaddr = NULL; 612 u_int32_t *xidp; 613 struct __rpc_sockinfo si; 614 struct sockaddr *localsa; 615 struct netbuf tbuf; 616 617 if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) { 618 if (reply_type == RPCBPROC_INDIRECT) 619 svcerr_systemerr(transp); 620 return; 621 } 622 if (si.si_socktype != SOCK_DGRAM) 623 return; /* Only datagram type accepted */ 624 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE); 625 if (sendsz == 0) { /* data transfer not supported */ 626 if (reply_type == RPCBPROC_INDIRECT) 627 svcerr_systemerr(transp); 628 return; 629 } 630 /* 631 * Should be multiple of 4 for XDR. 632 */ 633 sendsz = ((sendsz + 3) / 4) * 4; 634 if (sendsz > RPC_BUF_MAX) { 635#ifdef notyet 636 buf_alloc = alloca(sendsz); /* not in IDR2? */ 637#else 638 buf_alloc = malloc(sendsz); 639#endif /* notyet */ 640 if (buf_alloc == NULL) { 641 if (debugging) 642 fprintf(stderr, 643 "rpcbproc_callit_com: No Memory!\n"); 644 if (reply_type == RPCBPROC_INDIRECT) 645 svcerr_systemerr(transp); 646 return; 647 } 648 a.rmt_args.args = buf_alloc; 649 } else { 650 a.rmt_args.args = buf; 651 } 652 653 call_msg.rm_xid = 0; /* For error checking purposes */ 654 if (!svc_getargs(transp, (xdrproc_t) xdr_rmtcall_args, (char *) &a)) { 655 if (reply_type == RPCBPROC_INDIRECT) 656 svcerr_decode(transp); 657 if (debugging) 658 fprintf(stderr, 659 "rpcbproc_callit_com: svc_getargs failed\n"); 660 goto error; 661 } 662 663 if (!check_callit(transp, &a, versnum)) { 664 svcerr_weakauth(transp); 665 goto error; 666 } 667 668 caller = svc_getrpccaller(transp); 669#ifdef RPCBIND_DEBUG 670 if (debugging) { 671 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller); 672 fprintf(stderr, "%s %s req for (%lu, %lu, %lu, %s) from %s : ", 673 versnum == PMAPVERS ? "pmap_rmtcall" : 674 versnum == RPCBVERS ? "rpcb_rmtcall" : 675 versnum == RPCBVERS4 ? "rpcb_indirect" : 676 rpcbind_unknown, 677 reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit", 678 (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers, 679 (unsigned long)a.rmt_proc, transp->xp_netid, 680 uaddr ? uaddr : rpcbind_unknown); 681 if (uaddr) 682 free((void *) uaddr); 683 } 684#endif 685 686 rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid); 687 688 rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers, 689 a.rmt_proc, transp->xp_netid, rbl); 690 691 if (rbl == NULL) { 692#ifdef RPCBIND_DEBUG 693 if (debugging) 694 fprintf(stderr, "not found\n"); 695#endif 696 if (reply_type == RPCBPROC_INDIRECT) 697 svcerr_noprog(transp); 698 goto error; 699 } 700 if (rbl->rpcb_map.r_vers != a.rmt_vers) { 701 if (reply_type == RPCBPROC_INDIRECT) { 702 rpcvers_t vers_low, vers_high; 703 704 find_versions(a.rmt_prog, transp->xp_netid, 705 &vers_low, &vers_high); 706 svcerr_progvers(transp, vers_low, vers_high); 707 } 708 goto error; 709 } 710 711#ifdef RPCBIND_DEBUG 712 if (debugging) 713 fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr); 714#endif 715 /* 716 * Check whether this entry is valid and a server is present 717 * Mergeaddr() returns NULL if no such entry is present, and 718 * returns "" if the entry was present but the server is not 719 * present (i.e., it crashed). 720 */ 721 if (reply_type == RPCBPROC_INDIRECT) { 722 uaddr = mergeaddr(transp, transp->xp_netid, 723 rbl->rpcb_map.r_addr, NULL); 724 if ((uaddr == NULL) || uaddr[0] == '\0') { 725 svcerr_noprog(transp); 726 if (uaddr != NULL) { 727 free((void *) uaddr); 728 } 729 goto error; 730 } 731 if (uaddr != NULL) { 732 free((void *) uaddr); 733 } 734 } 735 nconf = rpcbind_get_conf(transp->xp_netid); 736 if (nconf == NULL) { 737 if (reply_type == RPCBPROC_INDIRECT) 738 svcerr_systemerr(transp); 739 if (debugging) 740 fprintf(stderr, 741 "rpcbproc_callit_com: rpcbind_get_conf failed\n"); 742 goto error; 743 } 744 localsa = local_sa(((struct sockaddr *)caller->buf)->sa_family); 745 if (localsa == NULL) { 746 if (debugging) 747 fprintf(stderr, 748 "rpcbproc_callit_com: no local address\n"); 749 goto error; 750 } 751 tbuf.len = tbuf.maxlen = localsa->sa_len; 752 tbuf.buf = localsa; 753 local_uaddr = 754 addrmerge(&tbuf, rbl->rpcb_map.r_addr, NULL, nconf->nc_netid); 755 m_uaddr = addrmerge(caller, rbl->rpcb_map.r_addr, NULL, 756 nconf->nc_netid); 757#ifdef RPCBIND_DEBUG 758 if (debugging) 759 fprintf(stderr, "merged uaddr %s\n", m_uaddr); 760#endif 761 if ((fd = find_rmtcallfd_by_netid(nconf->nc_netid)) == -1) { 762 if (reply_type == RPCBPROC_INDIRECT) 763 svcerr_systemerr(transp); 764 free((void *) m_uaddr); 765 goto error; 766 } 767 xidp = __rpcb_get_dg_xidp(transp); 768 call_msg.rm_xid = forward_register(*xidp, 769 caller, fd, m_uaddr, reply_type, versnum); 770 if (call_msg.rm_xid == 0) { 771 /* 772 * A duplicate request for the slow server. Let's not 773 * beat on it any more. 774 */ 775 if (debugging) 776 fprintf(stderr, 777 "rpcbproc_callit_com: duplicate request\n"); 778 free((void *) m_uaddr); 779 goto error; 780 } else if (call_msg.rm_xid == (uint32_t)-1) { 781 /* forward_register failed. Perhaps no memory. */ 782 if (debugging) 783 fprintf(stderr, 784 "rpcbproc_callit_com: forward_register failed\n"); 785 free((void *) m_uaddr); 786 goto error; 787 } 788 789#ifdef DEBUG_RMTCALL 790 if (debugging) 791 fprintf(stderr, 792 "rpcbproc_callit_com: original XID %x, new XID %x\n", 793 *xidp, call_msg.rm_xid); 794#endif 795 call_msg.rm_direction = CALL; 796 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; 797 call_msg.rm_call.cb_prog = a.rmt_prog; 798 call_msg.rm_call.cb_vers = a.rmt_vers; 799 if (sendsz > RPC_BUF_MAX) { 800#ifdef notyet 801 outbuf_alloc = alloca(sendsz); /* not in IDR2? */ 802#else 803 outbuf_alloc = malloc(sendsz); 804#endif /* notyet */ 805 if (outbuf_alloc == NULL) { 806 if (reply_type == RPCBPROC_INDIRECT) 807 svcerr_systemerr(transp); 808 if (debugging) 809 fprintf(stderr, 810 "rpcbproc_callit_com: No memory!\n"); 811 goto error; 812 } 813 xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE); 814 } else { 815 xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE); 816 } 817 if (!xdr_callhdr(&outxdr, &call_msg)) { 818 if (reply_type == RPCBPROC_INDIRECT) 819 svcerr_systemerr(transp); 820 if (debugging) 821 fprintf(stderr, 822 "rpcbproc_callit_com: xdr_callhdr failed\n"); 823 goto error; 824 } 825 if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) { 826 if (reply_type == RPCBPROC_INDIRECT) 827 svcerr_systemerr(transp); 828 if (debugging) 829 fprintf(stderr, 830 "rpcbproc_callit_com: xdr_u_long failed\n"); 831 goto error; 832 } 833 834 if (rqstp->rq_cred.oa_flavor == AUTH_NULL) { 835 auth = authnone_create(); 836 } else if (rqstp->rq_cred.oa_flavor == AUTH_SYS) { 837 struct authunix_parms *au; 838 839 au = (struct authunix_parms *)rqstp->rq_clntcred; 840 auth = authunix_create(au->aup_machname, 841 au->aup_uid, au->aup_gid, 842 au->aup_len, au->aup_gids); 843 if (auth == NULL) /* fall back */ 844 auth = authnone_create(); 845 } else { 846 /* we do not support any other authentication scheme */ 847 if (debugging) 848 fprintf(stderr, 849"rpcbproc_callit_com: oa_flavor != AUTH_NONE and oa_flavor != AUTH_SYS\n"); 850 if (reply_type == RPCBPROC_INDIRECT) 851 svcerr_weakauth(transp); /* XXX too strong.. */ 852 goto error; 853 } 854 if (auth == NULL) { 855 if (reply_type == RPCBPROC_INDIRECT) 856 svcerr_systemerr(transp); 857 if (debugging) 858 fprintf(stderr, 859 "rpcbproc_callit_com: authwhatever_create returned NULL\n"); 860 goto error; 861 } 862 if (!AUTH_MARSHALL(auth, &outxdr)) { 863 if (reply_type == RPCBPROC_INDIRECT) 864 svcerr_systemerr(transp); 865 AUTH_DESTROY(auth); 866 if (debugging) 867 fprintf(stderr, 868 "rpcbproc_callit_com: AUTH_MARSHALL failed\n"); 869 goto error; 870 } 871 AUTH_DESTROY(auth); 872 if (!xdr_opaque_parms(&outxdr, &a)) { 873 if (reply_type == RPCBPROC_INDIRECT) 874 svcerr_systemerr(transp); 875 if (debugging) 876 fprintf(stderr, 877 "rpcbproc_callit_com: xdr_opaque_parms failed\n"); 878 goto error; 879 } 880 outlen = (int) XDR_GETPOS(&outxdr); 881 if (outbuf_alloc) 882 outbufp = outbuf_alloc; 883 else 884 outbufp = outbuf; 885 886 na = uaddr2taddr(nconf, local_uaddr); 887 if (!na) { 888 if (reply_type == RPCBPROC_INDIRECT) 889 svcerr_systemerr(transp); 890 goto error; 891 } 892 893 if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len) 894 != outlen) { 895 if (debugging) 896 fprintf(stderr, 897 "rpcbproc_callit_com: sendto failed: errno %d\n", errno); 898 if (reply_type == RPCBPROC_INDIRECT) 899 svcerr_systemerr(transp); 900 goto error; 901 } 902 goto out; 903 904error: 905 if (call_msg.rm_xid != 0) 906 (void) free_slot_by_xid(call_msg.rm_xid); 907out: 908 if (local_uaddr) 909 free(local_uaddr); 910 if (buf_alloc) 911 free((void *) buf_alloc); 912 if (outbuf_alloc) 913 free((void *) outbuf_alloc); 914 if (na) { 915 free(na->buf); 916 free(na); 917 } 918} 919 920/* 921 * Makes an entry into the FIFO for the given request. 922 * If duplicate request, returns a 0, else returns the xid of its call. 923 */ 924static u_int32_t 925forward_register(u_int32_t caller_xid, struct netbuf *caller_addr, 926 int forward_fd, char *uaddr, rpcproc_t reply_type, 927 rpcvers_t versnum) 928{ 929 int i; 930 int j = 0; 931 time_t min_time, time_now; 932 static u_int32_t lastxid; 933 int entry = -1; 934 935 min_time = FINFO[0].time; 936 time_now = time((time_t *)0); 937 /* initialization */ 938 if (lastxid == 0) 939 lastxid = time_now * NFORWARD; 940 941 /* 942 * Check if it is an duplicate entry. Then, 943 * try to find an empty slot. If not available, then 944 * use the slot with the earliest time. 945 */ 946 for (i = 0; i < NFORWARD; i++) { 947 if (FINFO[i].flag & FINFO_ACTIVE) { 948 if ((FINFO[i].caller_xid == caller_xid) && 949 (FINFO[i].reply_type == reply_type) && 950 (FINFO[i].versnum == versnum) && 951 (!netbufcmp(FINFO[i].caller_addr, 952 caller_addr))) { 953 FINFO[i].time = time((time_t *)0); 954 return (0); /* Duplicate entry */ 955 } else { 956 /* Should we wait any longer */ 957 if ((time_now - FINFO[i].time) > MAXTIME_OFF) 958 (void) free_slot_by_index(i); 959 } 960 } 961 if (entry == -1) { 962 if ((FINFO[i].flag & FINFO_ACTIVE) == 0) { 963 entry = i; 964 } else if (FINFO[i].time < min_time) { 965 j = i; 966 min_time = FINFO[i].time; 967 } 968 } 969 } 970 if (entry != -1) { 971 /* use this empty slot */ 972 j = entry; 973 } else { 974 (void) free_slot_by_index(j); 975 } 976 if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) { 977 return (-1); 978 } 979 rpcb_rmtcalls++; /* no of pending calls */ 980 FINFO[j].flag = FINFO_ACTIVE; 981 FINFO[j].reply_type = reply_type; 982 FINFO[j].versnum = versnum; 983 FINFO[j].time = time_now; 984 FINFO[j].caller_xid = caller_xid; 985 FINFO[j].forward_fd = forward_fd; 986 /* 987 * Though uaddr is not allocated here, it will still be freed 988 * from free_slot_*(). 989 */ 990 FINFO[j].uaddr = uaddr; 991 lastxid = lastxid + NFORWARD; 992 FINFO[j].forward_xid = lastxid + j; /* encode slot */ 993 return (FINFO[j].forward_xid); /* forward on this xid */ 994} 995 996static struct finfo * 997forward_find(u_int32_t reply_xid) 998{ 999 int i; 1000 1001 i = reply_xid % NFORWARD; 1002 if (i < 0) 1003 i += NFORWARD; 1004 if ((FINFO[i].flag & FINFO_ACTIVE) && 1005 (FINFO[i].forward_xid == reply_xid)) { 1006 return (&FINFO[i]); 1007 } 1008 return (NULL); 1009} 1010 1011static int 1012free_slot_by_xid(u_int32_t xid) 1013{ 1014 int entry; 1015 1016 entry = xid % NFORWARD; 1017 if (entry < 0) 1018 entry += NFORWARD; 1019 return (free_slot_by_index(entry)); 1020} 1021 1022static int 1023free_slot_by_index(int idx) 1024{ 1025 struct finfo *fi; 1026 1027 fi = &FINFO[idx]; 1028 if (fi->flag & FINFO_ACTIVE) { 1029 netbuffree(fi->caller_addr); 1030 /* XXX may be too big, but can't access xprt array here */ 1031 if (fi->forward_fd >= svc_maxfd) 1032 svc_maxfd--; 1033 free((void *) fi->uaddr); 1034 fi->flag &= ~FINFO_ACTIVE; 1035 rpcb_rmtcalls--; 1036 return (1); 1037 } 1038 return (0); 1039} 1040 1041static int 1042netbufcmp(struct netbuf *n1, struct netbuf *n2) 1043{ 1044 return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len)); 1045} 1046 1047static struct netbuf * 1048netbufdup(struct netbuf *ap) 1049{ 1050 struct netbuf *np; 1051 1052 np = (struct netbuf *) malloc(sizeof (struct netbuf) + ap->len); 1053 if (np) { 1054 np->maxlen = np->len = ap->len; 1055 np->buf = ((char *) np) + sizeof (struct netbuf); 1056 (void) memcpy(np->buf, ap->buf, ap->len); 1057 } 1058 return (np); 1059} 1060 1061static void 1062netbuffree(struct netbuf *ap) 1063{ 1064 free((void *) ap); 1065} 1066 1067 1068#define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND) 1069extern bool_t __svc_clean_idle(fd_set *, int, bool_t); 1070 1071void 1072my_svc_run(void) 1073{ 1074 size_t nfds; 1075 struct pollfd pollfds[FD_SETSIZE]; 1076 int poll_ret, check_ret; 1077 int n; 1078#ifdef SVC_RUN_DEBUG 1079 int i; 1080#endif 1081 register struct pollfd *p; 1082 fd_set cleanfds; 1083 1084 for (;;) { 1085 p = pollfds; 1086 for (n = 0; n <= svc_maxfd; n++) { 1087 if (FD_ISSET(n, &svc_fdset)) { 1088 p->fd = n; 1089 p->events = MASKVAL; 1090 p++; 1091 } 1092 } 1093 nfds = p - pollfds; 1094 poll_ret = 0; 1095#ifdef SVC_RUN_DEBUG 1096 if (debugging) { 1097 fprintf(stderr, "polling for read on fd < "); 1098 for (i = 0, p = pollfds; i < nfds; i++, p++) 1099 if (p->events) 1100 fprintf(stderr, "%d ", p->fd); 1101 fprintf(stderr, ">\n"); 1102 } 1103#endif 1104 switch (poll_ret = poll(pollfds, nfds, 30 * 1000)) { 1105 case -1: 1106 /* 1107 * We ignore all errors, continuing with the assumption 1108 * that it was set by the signal handlers (or any 1109 * other outside event) and not caused by poll(). 1110 */ 1111 case 0: 1112 cleanfds = svc_fdset; 1113 __svc_clean_idle(&cleanfds, 30, FALSE); 1114 continue; 1115 default: 1116#ifdef SVC_RUN_DEBUG 1117 if (debugging) { 1118 fprintf(stderr, "poll returned read fds < "); 1119 for (i = 0, p = pollfds; i < nfds; i++, p++) 1120 if (p->revents) 1121 fprintf(stderr, "%d ", p->fd); 1122 fprintf(stderr, ">\n"); 1123 } 1124#endif 1125 /* 1126 * If we found as many replies on callback fds 1127 * as the number of descriptors selectable which 1128 * poll() returned, there can be no more so we 1129 * don't call svc_getreq_poll. Otherwise, there 1130 * must be another so we must call svc_getreq_poll. 1131 */ 1132 if ((check_ret = check_rmtcalls(pollfds, nfds)) == 1133 poll_ret) 1134 continue; 1135 svc_getreq_poll(pollfds, poll_ret-check_ret); 1136 } 1137#ifdef SVC_RUN_DEBUG 1138 if (debugging) { 1139 fprintf(stderr, "svc_maxfd now %u\n", svc_maxfd); 1140 } 1141#endif 1142 } 1143} 1144 1145static int 1146check_rmtcalls(struct pollfd *pfds, int nfds) 1147{ 1148 int j, ncallbacks_found = 0, rmtcalls_pending; 1149 SVCXPRT *xprt; 1150 1151 if (rpcb_rmtcalls == 0) 1152 return (0); 1153 1154 rmtcalls_pending = rpcb_rmtcalls; 1155 for (j = 0; j < nfds; j++) { 1156 if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) { 1157 if (pfds[j].revents) { 1158 ncallbacks_found++; 1159#ifdef DEBUG_RMTCALL 1160 if (debugging) 1161 fprintf(stderr, 1162"my_svc_run: polled on forwarding fd %d, netid %s - calling handle_reply\n", 1163 pfds[j].fd, xprt->xp_netid); 1164#endif 1165 handle_reply(pfds[j].fd, xprt); 1166 pfds[j].revents = 0; 1167 if (ncallbacks_found >= rmtcalls_pending) { 1168 break; 1169 } 1170 } 1171 } 1172 } 1173 return (ncallbacks_found); 1174} 1175 1176static void 1177xprt_set_caller(SVCXPRT *xprt, struct finfo *fi) 1178{ 1179 u_int32_t *xidp; 1180 1181 *(svc_getrpccaller(xprt)) = *(fi->caller_addr); 1182 xidp = __rpcb_get_dg_xidp(xprt); 1183 *xidp = fi->caller_xid; 1184} 1185 1186/* 1187 * Call svcerr_systemerr() only if RPCBVERS4 1188 */ 1189static void 1190send_svcsyserr(SVCXPRT *xprt, struct finfo *fi) 1191{ 1192 if (fi->reply_type == RPCBPROC_INDIRECT) { 1193 xprt_set_caller(xprt, fi); 1194 svcerr_systemerr(xprt); 1195 } 1196 return; 1197} 1198 1199static void 1200handle_reply(int fd, SVCXPRT *xprt) 1201{ 1202 XDR reply_xdrs; 1203 struct rpc_msg reply_msg; 1204 struct rpc_err reply_error; 1205 char *buffer; 1206 struct finfo *fi; 1207 int inlen, pos, len; 1208 struct r_rmtcall_args a; 1209 struct sockaddr_storage ss; 1210 socklen_t fromlen; 1211#ifdef SVC_RUN_DEBUG 1212 char *uaddr; 1213#endif 1214 1215 buffer = malloc(RPC_BUF_MAX); 1216 if (buffer == NULL) 1217 goto done; 1218 1219 do { 1220 fromlen = sizeof ss; 1221 inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0, 1222 (struct sockaddr *)&ss, &fromlen); 1223 } while (inlen < 0 && errno == EINTR); 1224 if (inlen < 0) { 1225 if (debugging) 1226 fprintf(stderr, 1227 "handle_reply: recvfrom returned %d, errno %d\n", inlen, errno); 1228 goto done; 1229 } 1230 1231 reply_msg.acpted_rply.ar_verf = _null_auth; 1232 reply_msg.acpted_rply.ar_results.where = 0; 1233 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void; 1234 1235 xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE); 1236 if (!xdr_replymsg(&reply_xdrs, &reply_msg)) { 1237 if (debugging) 1238 (void) fprintf(stderr, 1239 "handle_reply: xdr_replymsg failed\n"); 1240 goto done; 1241 } 1242 fi = forward_find(reply_msg.rm_xid); 1243#ifdef SVC_RUN_DEBUG 1244 if (debugging) { 1245 fprintf(stderr, "handle_reply: reply xid: %d fi addr: %p\n", 1246 reply_msg.rm_xid, fi); 1247 } 1248#endif 1249 if (fi == NULL) { 1250 goto done; 1251 } 1252 _seterr_reply(&reply_msg, &reply_error); 1253 if (reply_error.re_status != RPC_SUCCESS) { 1254 if (debugging) 1255 (void) fprintf(stderr, "handle_reply: %s\n", 1256 clnt_sperrno(reply_error.re_status)); 1257 send_svcsyserr(xprt, fi); 1258 goto done; 1259 } 1260 pos = XDR_GETPOS(&reply_xdrs); 1261 len = inlen - pos; 1262 a.rmt_args.args = &buffer[pos]; 1263 a.rmt_args.arglen = len; 1264 a.rmt_uaddr = fi->uaddr; 1265 a.rmt_localvers = fi->versnum; 1266 1267 xprt_set_caller(xprt, fi); 1268#ifdef SVC_RUN_DEBUG 1269 uaddr = taddr2uaddr(rpcbind_get_conf("udp"), 1270 svc_getrpccaller(xprt)); 1271 if (debugging) { 1272 fprintf(stderr, "handle_reply: forwarding address %s to %s\n", 1273 a.rmt_uaddr, uaddr ? uaddr : rpcbind_unknown); 1274 } 1275 if (uaddr) 1276 free((void *) uaddr); 1277#endif 1278 svc_sendreply(xprt, (xdrproc_t) xdr_rmtcall_result, (char *) &a); 1279done: 1280 if (buffer) 1281 free(buffer); 1282 1283 if (reply_msg.rm_xid == 0) { 1284#ifdef SVC_RUN_DEBUG 1285 if (debugging) { 1286 fprintf(stderr, "handle_reply: NULL xid on exit!\n"); 1287 } 1288#endif 1289 } else 1290 (void) free_slot_by_xid(reply_msg.rm_xid); 1291 return; 1292} 1293 1294static void 1295find_versions(rpcprog_t prog, char *netid, rpcvers_t *lowvp, rpcvers_t *highvp) 1296{ 1297 register rpcblist_ptr rbl; 1298 rpcvers_t lowv = 0; 1299 rpcvers_t highv = 0; 1300 1301 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 1302 if ((rbl->rpcb_map.r_prog != prog) || 1303 ((rbl->rpcb_map.r_netid != NULL) && 1304 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0))) 1305 continue; 1306 if (lowv == 0) { 1307 highv = rbl->rpcb_map.r_vers; 1308 lowv = highv; 1309 } else if (rbl->rpcb_map.r_vers < lowv) { 1310 lowv = rbl->rpcb_map.r_vers; 1311 } else if (rbl->rpcb_map.r_vers > highv) { 1312 highv = rbl->rpcb_map.r_vers; 1313 } 1314 } 1315 *lowvp = lowv; 1316 *highvp = highv; 1317 return; 1318} 1319 1320/* 1321 * returns the item with the given program, version number and netid. 1322 * If that version number is not found, it returns the item with that 1323 * program number, so that address is now returned to the caller. The 1324 * caller when makes a call to this program, version number, the call 1325 * will fail and it will return with PROGVERS_MISMATCH. The user can 1326 * then determine the highest and the lowest version number for this 1327 * program using clnt_geterr() and use those program version numbers. 1328 * 1329 * Returns the RPCBLIST for the given prog, vers and netid 1330 */ 1331static rpcblist_ptr 1332find_service(rpcprog_t prog, rpcvers_t vers, char *netid) 1333{ 1334 register rpcblist_ptr hit = NULL; 1335 register rpcblist_ptr rbl; 1336 1337 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) { 1338 if ((rbl->rpcb_map.r_prog != prog) || 1339 ((rbl->rpcb_map.r_netid != NULL) && 1340 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0))) 1341 continue; 1342 hit = rbl; 1343 if (rbl->rpcb_map.r_vers == vers) 1344 break; 1345 } 1346 return (hit); 1347} 1348 1349/* 1350 * Copies the name associated with the uid of the caller and returns 1351 * a pointer to it. Similar to getwd(). 1352 */ 1353static char * 1354getowner(SVCXPRT *transp, char *owner, size_t ownersize) 1355{ 1356 struct sockcred *sc; 1357 1358 sc = __svc_getcallercreds(transp); 1359 if (sc == NULL) 1360 strlcpy(owner, rpcbind_unknown, ownersize); 1361 else if (sc->sc_uid == 0) 1362 strlcpy(owner, rpcbind_superuser, ownersize); 1363 else 1364 snprintf(owner, ownersize, "%d", sc->sc_uid); 1365 1366 return owner; 1367} 1368 1369#ifdef PORTMAP 1370/* 1371 * Add this to the pmap list only if it is UDP or TCP. 1372 */ 1373static int 1374add_pmaplist(RPCB *arg) 1375{ 1376 struct pmap pmap; 1377 struct pmaplist *pml; 1378 int h1, h2, h3, h4, p1, p2; 1379 1380 if (strcmp(arg->r_netid, udptrans) == 0) { 1381 /* It is UDP! */ 1382 pmap.pm_prot = IPPROTO_UDP; 1383 } else if (strcmp(arg->r_netid, tcptrans) == 0) { 1384 /* It is TCP */ 1385 pmap.pm_prot = IPPROTO_TCP; 1386 } else 1387 /* Not a IP protocol */ 1388 return (0); 1389 1390 /* interpret the universal address for TCP/IP */ 1391 if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d", 1392 &h1, &h2, &h3, &h4, &p1, &p2) != 6) 1393 return (0); 1394 pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff); 1395 pmap.pm_prog = arg->r_prog; 1396 pmap.pm_vers = arg->r_vers; 1397 /* 1398 * add to END of list 1399 */ 1400 pml = (struct pmaplist *) malloc((u_int)sizeof (struct pmaplist)); 1401 if (pml == NULL) { 1402 (void) syslog(LOG_ERR, "rpcbind: no memory!\n"); 1403 return (1); 1404 } 1405 pml->pml_map = pmap; 1406 pml->pml_next = NULL; 1407 if (list_pml == NULL) { 1408 list_pml = pml; 1409 } else { 1410 struct pmaplist *fnd; 1411 1412 /* Attach to the end of the list */ 1413 for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next) 1414 ; 1415 fnd->pml_next = pml; 1416 } 1417 return (0); 1418} 1419 1420/* 1421 * Delete this from the pmap list only if it is UDP or TCP. 1422 */ 1423static int 1424del_pmaplist(RPCB *arg) 1425{ 1426 struct pmaplist *pml; 1427 struct pmaplist *prevpml, *fnd; 1428 unsigned long prot; 1429 1430 if (strcmp(arg->r_netid, udptrans) == 0) { 1431 /* It is UDP! */ 1432 prot = IPPROTO_UDP; 1433 } else if (strcmp(arg->r_netid, tcptrans) == 0) { 1434 /* It is TCP */ 1435 prot = IPPROTO_TCP; 1436 } else if (arg->r_netid[0] == 0) { 1437 prot = 0; /* Remove all occurrences */ 1438 } else { 1439 /* Not a IP protocol */ 1440 return (0); 1441 } 1442 for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) { 1443 if ((pml->pml_map.pm_prog != arg->r_prog) || 1444 (pml->pml_map.pm_vers != arg->r_vers) || 1445 (prot && (pml->pml_map.pm_prot != prot))) { 1446 /* both pml & prevpml move forwards */ 1447 prevpml = pml; 1448 pml = pml->pml_next; 1449 continue; 1450 } 1451 /* found it; pml moves forward, prevpml stays */ 1452 fnd = pml; 1453 pml = pml->pml_next; 1454 if (prevpml == NULL) 1455 list_pml = pml; 1456 else 1457 prevpml->pml_next = pml; 1458 free((void *) fnd); 1459 } 1460 return (0); 1461} 1462#endif /* PORTMAP */ 1463