1 /* $NetBSD: rpcb_svc_com.c,v 1.9 2002/11/08 00:16:39 fvdl Exp $ */
5 * Copyright (c) 2009, Sun Microsystems, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 * - Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 * - Neither the name of Sun Microsystems, Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived
17 * from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
35 /* #ident "@(#)rpcb_svc_com.c 1.18 94/05/02 SMI" */
39 * The commom server procedure for the rpcbind.
42 #include <sys/types.h>
44 #include <sys/param.h>
46 #include <sys/socket.h>
48 #include <rpc/rpcb_prot.h>
49 #include <rpc/svc_dg.h>
50 #include <netconfig.h>
56 #include <netinet/in.h>
57 #include <rpc/pmap_prot.h>
64 #define RPC_BUF_MAX 65536 /* can be raised if required */
66 static char *nullstring = "";
67 static int rpcb_rmtcalls;
69 struct rmtcallfd_list {
73 struct rmtcallfd_list *next;
77 #define MAXTIME_OFF 300 /* 5 minutes */
81 #define FINFO_ACTIVE 0x1
83 struct netbuf *caller_addr;
84 u_int32_t forward_xid;
91 static struct finfo FINFO[NFORWARD];
94 static bool_t xdr_encap_parms(XDR *, struct encap_parms *);
95 static bool_t xdr_rmtcall_args(XDR *, struct r_rmtcall_args *);
96 static bool_t xdr_rmtcall_result(XDR *, struct r_rmtcall_args *);
97 static bool_t xdr_opaque_parms(XDR *, struct r_rmtcall_args *);
98 static int find_rmtcallfd_by_netid(char *);
99 static SVCXPRT *find_rmtcallxprt_by_fd(int);
100 static int forward_register(u_int32_t, struct netbuf *, int, char *,
101 rpcproc_t, rpcvers_t, u_int32_t *);
102 static struct finfo *forward_find(u_int32_t);
103 static int free_slot_by_xid(u_int32_t);
104 static int free_slot_by_index(int);
105 static int netbufcmp(struct netbuf *, struct netbuf *);
106 static struct netbuf *netbufdup(struct netbuf *);
107 static void netbuffree(struct netbuf *);
108 static int check_rmtcalls(struct pollfd *, int);
109 static void xprt_set_caller(SVCXPRT *, struct finfo *);
110 static void send_svcsyserr(SVCXPRT *, struct finfo *);
111 static void handle_reply(int, SVCXPRT *);
112 static void find_versions(rpcprog_t, char *, rpcvers_t *, rpcvers_t *);
113 static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *);
114 static char *getowner(SVCXPRT *, char *, size_t);
115 static int add_pmaplist(RPCB *);
116 static int del_pmaplist(RPCB *);
119 * Set a mapping of program, version, netid
123 rpcbproc_set_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
124 rpcvers_t rpcbversnum)
126 RPCB *regp = (RPCB *)arg;
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);
136 ans = map_set(regp, getowner(transp, owner, sizeof owner));
139 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
141 /* XXX: should have used some defined constant here */
142 rpcbs_set(rpcbversnum - 2, ans);
147 map_set(RPCB *regp, char *owner)
150 rpcblist_ptr rbl, fnd;
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
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))
162 * if these match then it is already
163 * registered so just say "OK".
170 * add to the end of the list
172 rbl = malloc(sizeof (RPCBLIST));
175 a = &(rbl->rpcb_map);
176 a->r_prog = reg.r_prog;
177 a->r_vers = reg.r_vers;
178 a->r_netid = strdup(reg.r_netid);
179 a->r_addr = strdup(reg.r_addr);
180 a->r_owner = strdup(owner);
181 if (!a->r_addr || !a->r_netid || !a->r_owner) {
191 rbl->rpcb_next = (rpcblist_ptr)NULL;
192 if (list_rbl == NULL) {
195 for (fnd = list_rbl; fnd->rpcb_next;
196 fnd = fnd->rpcb_next)
198 fnd->rpcb_next = rbl;
201 (void) add_pmaplist(regp);
207 * Unset a mapping of program, version, netid
211 rpcbproc_unset_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
212 rpcvers_t rpcbversnum)
214 RPCB *regp = (RPCB *)arg;
220 fprintf(stderr, "RPCB_UNSET request for (%lu, %lu, %s) : ",
221 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
224 ans = map_unset(regp, getowner(transp, owner, sizeof owner));
227 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
229 /* XXX: should have used some defined constant here */
230 rpcbs_unset(rpcbversnum - 2, ans);
235 map_unset(RPCB *regp, char *owner)
238 rpcblist_ptr rbl, prev, tmp;
243 for (prev = NULL, rbl = list_rbl; rbl; /* cstyle */) {
244 if ((rbl->rpcb_map.r_prog != regp->r_prog) ||
245 (rbl->rpcb_map.r_vers != regp->r_vers) ||
246 (regp->r_netid[0] && strcasecmp(regp->r_netid,
247 rbl->rpcb_map.r_netid))) {
248 /* both rbl & prev move forwards */
250 rbl = rbl->rpcb_next;
254 * Check whether appropriate uid. Unset only
255 * if superuser or the owner itself.
257 if (strcmp(owner, "superuser") &&
258 strcmp(rbl->rpcb_map.r_owner, owner))
260 /* found it; rbl moves forward, prev stays */
263 rbl = rbl->rpcb_next;
267 prev->rpcb_next = rbl;
268 free(tmp->rpcb_map.r_addr);
269 free(tmp->rpcb_map.r_netid);
270 free(tmp->rpcb_map.r_owner);
275 (void) del_pmaplist(regp);
278 * We return 1 either when the entry was not there or it
279 * was able to unset it. It can come to this point only if
280 * atleast one of the conditions is true.
286 delete_prog(unsigned int prog)
289 register rpcblist_ptr rbl;
291 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
292 if ((rbl->rpcb_map.r_prog != prog))
294 if (is_bound(rbl->rpcb_map.r_netid, rbl->rpcb_map.r_addr))
296 reg.r_prog = rbl->rpcb_map.r_prog;
297 reg.r_vers = rbl->rpcb_map.r_vers;
298 reg.r_netid = strdup(rbl->rpcb_map.r_netid);
299 (void) map_unset(®, "superuser");
305 rpcbproc_getaddr_com(RPCB *regp, struct svc_req *rqstp __unused,
306 SVCXPRT *transp, rpcvers_t rpcbversnum, rpcvers_t verstype)
312 if (uaddr != NULL && uaddr != nullstring) {
316 fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid);
317 if (fnd && ((verstype == RPCB_ALLVERS) ||
318 (regp->r_vers == fnd->rpcb_map.r_vers))) {
319 if (*(regp->r_addr) != '\0') { /* may contain a hint about */
320 saddr = regp->r_addr; /* the interface that we */
322 if (!(uaddr = mergeaddr(transp, transp->xp_netid,
323 fnd->rpcb_map.r_addr, saddr))) {
324 /* Try whatever we have */
325 uaddr = strdup(fnd->rpcb_map.r_addr);
326 } else if (!uaddr[0]) {
328 * The server died. Unset all versions of this prog.
330 delete_prog(regp->r_prog);
338 fprintf(stderr, "getaddr: %s\n", uaddr);
340 /* XXX: should have used some defined constant here */
341 rpcbs_getaddr(rpcbversnum - 2, regp->r_prog, regp->r_vers,
342 transp->xp_netid, uaddr);
343 return (void *)&uaddr;
348 rpcbproc_gettime_com(void *arg __unused, struct svc_req *rqstp __unused,
349 SVCXPRT *transp __unused, rpcvers_t rpcbversnum __unused)
351 static time_t curtime;
353 (void) time(&curtime);
354 return (void *)&curtime;
358 * Convert uaddr to taddr. Should be used only by
359 * local servers/clients. (kernel level stuff only)
363 rpcbproc_uaddr2taddr_com(void *arg, struct svc_req *rqstp __unused,
364 SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
366 char **uaddrp = (char **)arg;
367 struct netconfig *nconf;
368 static struct netbuf nbuf;
369 static struct netbuf *taddr;
376 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
377 ((taddr = uaddr2taddr(nconf, *uaddrp)) == NULL)) {
378 (void) memset((char *)&nbuf, 0, sizeof (struct netbuf));
379 return (void *)&nbuf;
381 return (void *)taddr;
385 * Convert taddr to uaddr. Should be used only by
386 * local servers/clients. (kernel level stuff only)
390 rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp __unused,
391 SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
393 struct netbuf *taddr = (struct netbuf *)arg;
395 struct netconfig *nconf;
400 if ((fd = open("/dev/null", O_RDONLY)) == -1) {
401 uaddr = (char *)strerror(errno);
404 #endif /* CHEW_FDS */
405 if (uaddr != NULL && uaddr != nullstring) {
409 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
410 ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) {
413 return (void *)&uaddr;
418 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
420 return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), ~0));
424 * XDR remote call arguments. It ignores the address part.
425 * written for XDR_DECODE direction only
428 xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap)
430 /* does not get the address or the arguments */
431 if (xdr_u_int32_t(xdrs, &(cap->rmt_prog)) &&
432 xdr_u_int32_t(xdrs, &(cap->rmt_vers)) &&
433 xdr_u_int32_t(xdrs, &(cap->rmt_proc))) {
434 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
440 * XDR remote call results along with the address. Ignore
441 * program number, version number and proc number.
442 * Written for XDR_ENCODE direction only.
445 xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap)
450 if (cap->rmt_localvers == PMAPVERS) {
451 int h1, h2, h3, h4, p1, p2;
454 /* interpret the universal address for TCP/IP */
455 if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d",
456 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
458 port = ((p1 & 0xff) << 8) + (p2 & 0xff);
459 result = xdr_u_long(xdrs, &port);
462 if ((cap->rmt_localvers == RPCBVERS) ||
463 (cap->rmt_localvers == RPCBVERS4)) {
464 result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr));
469 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
474 * only worries about the struct encap_parms part of struct r_rmtcall_args.
475 * The arglen must already be set!!
478 xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap)
480 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
483 static struct rmtcallfd_list *rmthead;
484 static struct rmtcallfd_list *rmttail;
487 create_rmtcall_fd(struct netconfig *nconf)
490 struct rmtcallfd_list *rmt;
493 if ((fd = __rpc_nconf2fd(nconf)) == -1) {
496 "create_rmtcall_fd: couldn't open \"%s\" (errno %d)\n",
497 nconf->nc_device, errno);
500 xprt = svc_tli_create(fd, 0, (struct t_bind *) 0, 0, 0);
504 "create_rmtcall_fd: svc_tli_create failed\n");
507 rmt = malloc(sizeof (struct rmtcallfd_list));
509 syslog(LOG_ERR, "create_rmtcall_fd: no memory!");
513 rmt->netid = strdup(nconf->nc_netid);
514 xprt->xp_netid = rmt->netid;
517 if (rmthead == NULL) {
524 /* XXX not threadsafe */
527 FD_SET(fd, &svc_fdset);
532 find_rmtcallfd_by_netid(char *netid)
534 struct rmtcallfd_list *rmt;
536 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
537 if (strcmp(netid, rmt->netid) == 0) {
545 find_rmtcallxprt_by_fd(int fd)
547 struct rmtcallfd_list *rmt;
549 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
559 * Call a remote procedure service. This procedure is very quiet when things
560 * go wrong. The proc is written to support broadcast rpc. In the broadcast
561 * case, a machine should shut-up instead of complain, lest the requestor be
562 * overrun with complaints at the expense of not hearing a valid reply.
563 * When receiving a request and verifying that the service exists, we
565 * receive the request
567 * open a new TLI endpoint on the same transport on which we received
568 * the original request
570 * remember the original request's XID (which requires knowing the format
571 * of the svc_dg_data structure)
573 * forward the request, with a new XID, to the requested service,
574 * remembering the XID used to send this request (for later use in
575 * reassociating the answer with the original request), the requestor's
576 * address, the file descriptor on which the forwarded request is
577 * made and the service's address.
579 * mark the file descriptor on which we anticipate receiving a reply from
580 * the service and one to select for in our private svc_run procedure
582 * At some time in the future, a reply will be received from the service to
583 * which we forwarded the request. At that time, we detect that the socket
584 * used was for forwarding (by looking through the finfo structures to see
585 * whether the fd corresponds to one of those) and call handle_reply() to
589 * bundle the reply, along with the service's universal address
591 * create a SVCXPRT structure and use a version of svc_sendreply
592 * that allows us to specify the reply XID and destination, send the reply
593 * to the original requestor.
597 rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp,
598 rpcproc_t reply_type, rpcvers_t versnum)
600 register rpcblist_ptr rbl;
601 struct netconfig *nconf;
602 struct netbuf *caller;
603 struct r_rmtcall_args a;
604 char *buf_alloc = NULL, *outbufp;
605 char *outbuf_alloc = NULL;
606 char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX];
607 struct netbuf *na = (struct netbuf *) NULL;
608 struct rpc_msg call_msg;
614 char *uaddr, *m_uaddr = NULL, *local_uaddr = NULL;
616 struct __rpc_sockinfo si;
617 struct sockaddr *localsa;
620 if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) {
621 if (reply_type == RPCBPROC_INDIRECT)
622 svcerr_systemerr(transp);
625 if (si.si_socktype != SOCK_DGRAM)
626 return; /* Only datagram type accepted */
627 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE);
628 if (sendsz == 0) { /* data transfer not supported */
629 if (reply_type == RPCBPROC_INDIRECT)
630 svcerr_systemerr(transp);
634 * Should be multiple of 4 for XDR.
636 sendsz = ((sendsz + 3) / 4) * 4;
637 if (sendsz > RPC_BUF_MAX) {
639 buf_alloc = alloca(sendsz); /* not in IDR2? */
641 buf_alloc = malloc(sendsz);
643 if (buf_alloc == NULL) {
646 "rpcbproc_callit_com: No Memory!\n");
647 if (reply_type == RPCBPROC_INDIRECT)
648 svcerr_systemerr(transp);
651 a.rmt_args.args = buf_alloc;
653 a.rmt_args.args = buf;
656 call_msg.rm_xid = 0; /* For error checking purposes */
657 if (!svc_getargs(transp, (xdrproc_t) xdr_rmtcall_args, (char *) &a)) {
658 if (reply_type == RPCBPROC_INDIRECT)
659 svcerr_decode(transp);
662 "rpcbproc_callit_com: svc_getargs failed\n");
666 if (!check_callit(transp, &a, versnum)) {
667 svcerr_weakauth(transp);
671 caller = svc_getrpccaller(transp);
674 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller);
675 fprintf(stderr, "%s %s req for (%lu, %lu, %lu, %s) from %s : ",
676 versnum == PMAPVERS ? "pmap_rmtcall" :
677 versnum == RPCBVERS ? "rpcb_rmtcall" :
678 versnum == RPCBVERS4 ? "rpcb_indirect" : "unknown",
679 reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit",
680 (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers,
681 (unsigned long)a.rmt_proc, transp->xp_netid,
682 uaddr ? uaddr : "unknown");
688 rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid);
690 rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers,
691 a.rmt_proc, transp->xp_netid, rbl);
693 if (rbl == (rpcblist_ptr)NULL) {
696 fprintf(stderr, "not found\n");
698 if (reply_type == RPCBPROC_INDIRECT)
699 svcerr_noprog(transp);
702 if (rbl->rpcb_map.r_vers != a.rmt_vers) {
703 if (reply_type == RPCBPROC_INDIRECT) {
704 rpcvers_t vers_low, vers_high;
706 find_versions(a.rmt_prog, transp->xp_netid,
707 &vers_low, &vers_high);
708 svcerr_progvers(transp, vers_low, vers_high);
715 fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr);
718 * Check whether this entry is valid and a server is present
719 * Mergeaddr() returns NULL if no such entry is present, and
720 * returns "" if the entry was present but the server is not
721 * present (i.e., it crashed).
723 if (reply_type == RPCBPROC_INDIRECT) {
724 uaddr = mergeaddr(transp, transp->xp_netid,
725 rbl->rpcb_map.r_addr, NULL);
726 if (uaddr == NULL || uaddr[0] == '\0') {
727 svcerr_noprog(transp);
734 nconf = rpcbind_get_conf(transp->xp_netid);
735 if (nconf == (struct netconfig *)NULL) {
736 if (reply_type == RPCBPROC_INDIRECT)
737 svcerr_systemerr(transp);
740 "rpcbproc_callit_com: rpcbind_get_conf failed\n");
743 localsa = local_sa(((struct sockaddr *)caller->buf)->sa_family);
744 if (localsa == NULL) {
747 "rpcbproc_callit_com: no local address\n");
750 tbuf.len = tbuf.maxlen = localsa->sa_len;
753 addrmerge(&tbuf, rbl->rpcb_map.r_addr, NULL, nconf->nc_netid);
754 m_uaddr = addrmerge(caller, rbl->rpcb_map.r_addr, NULL,
758 fprintf(stderr, "merged uaddr %s\n", m_uaddr);
760 if ((fd = find_rmtcallfd_by_netid(nconf->nc_netid)) == -1) {
761 if (reply_type == RPCBPROC_INDIRECT)
762 svcerr_systemerr(transp);
765 xidp = __rpcb_get_dg_xidp(transp);
766 switch (forward_register(*xidp, caller, fd, m_uaddr, reply_type,
767 versnum, &call_msg.rm_xid)) {
769 /* Success; forward_register() will free m_uaddr for us. */
774 * A duplicate request for the slow server. Let's not
775 * beat on it any more.
779 "rpcbproc_callit_com: duplicate request\n");
782 /* forward_register failed. Perhaps no memory. */
785 "rpcbproc_callit_com: forward_register failed\n");
792 "rpcbproc_callit_com: original XID %x, new XID %x\n",
793 *xidp, call_msg.rm_xid);
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) {
801 outbuf_alloc = alloca(sendsz); /* not in IDR2? */
803 outbuf_alloc = malloc(sendsz);
805 if (outbuf_alloc == NULL) {
806 if (reply_type == RPCBPROC_INDIRECT)
807 svcerr_systemerr(transp);
810 "rpcbproc_callit_com: No memory!\n");
813 xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE);
815 xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE);
817 if (!xdr_callhdr(&outxdr, &call_msg)) {
818 if (reply_type == RPCBPROC_INDIRECT)
819 svcerr_systemerr(transp);
822 "rpcbproc_callit_com: xdr_callhdr failed\n");
825 if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) {
826 if (reply_type == RPCBPROC_INDIRECT)
827 svcerr_systemerr(transp);
830 "rpcbproc_callit_com: xdr_u_long failed\n");
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;
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();
846 /* we do not support any other authentication scheme */
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.. */
855 if (reply_type == RPCBPROC_INDIRECT)
856 svcerr_systemerr(transp);
859 "rpcbproc_callit_com: authwhatever_create returned NULL\n");
862 if (!AUTH_MARSHALL(auth, &outxdr)) {
863 if (reply_type == RPCBPROC_INDIRECT)
864 svcerr_systemerr(transp);
868 "rpcbproc_callit_com: AUTH_MARSHALL failed\n");
872 if (!xdr_opaque_parms(&outxdr, &a)) {
873 if (reply_type == RPCBPROC_INDIRECT)
874 svcerr_systemerr(transp);
877 "rpcbproc_callit_com: xdr_opaque_parms failed\n");
880 outlen = (int) XDR_GETPOS(&outxdr);
882 outbufp = outbuf_alloc;
886 na = uaddr2taddr(nconf, local_uaddr);
888 if (reply_type == RPCBPROC_INDIRECT)
889 svcerr_systemerr(transp);
893 if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len)
897 "rpcbproc_callit_com: sendto failed: errno %d\n", errno);
898 if (reply_type == RPCBPROC_INDIRECT)
899 svcerr_systemerr(transp);
905 if (call_msg.rm_xid != 0)
906 (void) free_slot_by_xid(call_msg.rm_xid);
923 * Makes an entry into the FIFO for the given request.
924 * Returns 1 on success, 0 if this is a duplicate request, or -1 on error.
925 * *callxidp is set to the xid of the call.
928 forward_register(u_int32_t caller_xid, struct netbuf *caller_addr,
929 int forward_fd, char *uaddr, rpcproc_t reply_type,
930 rpcvers_t versnum, u_int32_t *callxidp)
934 time_t min_time, time_now;
935 static u_int32_t lastxid;
938 min_time = FINFO[0].time;
939 time_now = time((time_t *)0);
942 lastxid = time_now * NFORWARD;
945 * Check if it is a duplicate entry. Then,
946 * try to find an empty slot. If not available, then
947 * use the slot with the earliest time.
949 for (i = 0; i < NFORWARD; i++) {
950 if (FINFO[i].flag & FINFO_ACTIVE) {
951 if ((FINFO[i].caller_xid == caller_xid) &&
952 (FINFO[i].reply_type == reply_type) &&
953 (FINFO[i].versnum == versnum) &&
954 (!netbufcmp(FINFO[i].caller_addr,
956 FINFO[i].time = time((time_t *)0);
957 return (0); /* Duplicate entry */
959 /* Should we wait any longer */
960 if ((time_now - FINFO[i].time) > MAXTIME_OFF)
961 (void) free_slot_by_index(i);
965 if ((FINFO[i].flag & FINFO_ACTIVE) == 0) {
967 } else if (FINFO[i].time < min_time) {
969 min_time = FINFO[i].time;
974 /* use this empty slot */
977 (void) free_slot_by_index(j);
979 if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) {
982 rpcb_rmtcalls++; /* no of pending calls */
983 FINFO[j].flag = FINFO_ACTIVE;
984 FINFO[j].reply_type = reply_type;
985 FINFO[j].versnum = versnum;
986 FINFO[j].time = time_now;
987 FINFO[j].caller_xid = caller_xid;
988 FINFO[j].forward_fd = forward_fd;
990 * Though uaddr is not allocated here, it will still be freed
991 * from free_slot_*().
993 FINFO[j].uaddr = uaddr;
994 lastxid = lastxid + NFORWARD;
995 /* Don't allow a zero xid below. */
996 if ((u_int32_t)(lastxid + NFORWARD) <= NFORWARD)
998 FINFO[j].forward_xid = lastxid + j; /* encode slot */
999 *callxidp = FINFO[j].forward_xid; /* forward on this xid */
1003 static struct finfo *
1004 forward_find(u_int32_t reply_xid)
1008 i = reply_xid % (u_int32_t)NFORWARD;
1009 if ((FINFO[i].flag & FINFO_ACTIVE) &&
1010 (FINFO[i].forward_xid == reply_xid)) {
1017 free_slot_by_xid(u_int32_t xid)
1021 entry = xid % (u_int32_t)NFORWARD;
1022 return (free_slot_by_index(entry));
1026 free_slot_by_index(int index)
1031 if (fi->flag & FINFO_ACTIVE) {
1032 netbuffree(fi->caller_addr);
1033 /* XXX may be too big, but can't access xprt array here */
1034 if (fi->forward_fd >= svc_maxfd)
1037 fi->flag &= ~FINFO_ACTIVE;
1045 netbufcmp(struct netbuf *n1, struct netbuf *n2)
1047 return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len));
1050 static struct netbuf *
1051 netbufdup(struct netbuf *ap)
1055 if ((np = malloc(sizeof(struct netbuf))) == NULL)
1057 if ((np->buf = malloc(ap->len)) == NULL) {
1061 np->maxlen = np->len = ap->len;
1062 memcpy(np->buf, ap->buf, ap->len);
1067 netbuffree(struct netbuf *ap)
1074 #define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)
1075 extern bool_t __svc_clean_idle(fd_set *, int, bool_t);
1081 struct pollfd pollfds[FD_SETSIZE];
1082 int poll_ret, check_ret;
1084 #ifdef SVC_RUN_DEBUG
1087 register struct pollfd *p;
1092 for (n = 0; n <= svc_maxfd; n++) {
1093 if (FD_ISSET(n, &svc_fdset)) {
1095 p->events = MASKVAL;
1101 #ifdef SVC_RUN_DEBUG
1103 fprintf(stderr, "polling for read on fd < ");
1104 for (i = 0, p = pollfds; i < nfds; i++, p++)
1106 fprintf(stderr, "%d ", p->fd);
1107 fprintf(stderr, ">\n");
1110 switch (poll_ret = poll(pollfds, nfds, 30 * 1000)) {
1113 * We ignore all errors, continuing with the assumption
1114 * that it was set by the signal handlers (or any
1115 * other outside event) and not caused by poll().
1118 cleanfds = svc_fdset;
1119 __svc_clean_idle(&cleanfds, 30, FALSE);
1122 #ifdef SVC_RUN_DEBUG
1124 fprintf(stderr, "poll returned read fds < ");
1125 for (i = 0, p = pollfds; i < nfds; i++, p++)
1127 fprintf(stderr, "%d ", p->fd);
1128 fprintf(stderr, ">\n");
1132 * If we found as many replies on callback fds
1133 * as the number of descriptors selectable which
1134 * poll() returned, there can be no more so we
1135 * don't call svc_getreq_poll. Otherwise, there
1136 * must be another so we must call svc_getreq_poll.
1138 if ((check_ret = check_rmtcalls(pollfds, nfds)) ==
1141 svc_getreq_poll(pollfds, poll_ret-check_ret);
1143 #ifdef SVC_RUN_DEBUG
1145 fprintf(stderr, "svc_maxfd now %u\n", svc_maxfd);
1152 check_rmtcalls(struct pollfd *pfds, int nfds)
1154 int j, ncallbacks_found = 0, rmtcalls_pending;
1157 if (rpcb_rmtcalls == 0)
1160 rmtcalls_pending = rpcb_rmtcalls;
1161 for (j = 0; j < nfds; j++) {
1162 if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) {
1163 if (pfds[j].revents) {
1165 #ifdef DEBUG_RMTCALL
1168 "my_svc_run: polled on forwarding fd %d, netid %s - calling handle_reply\n",
1169 pfds[j].fd, xprt->xp_netid);
1171 handle_reply(pfds[j].fd, xprt);
1172 pfds[j].revents = 0;
1173 if (ncallbacks_found >= rmtcalls_pending) {
1179 return (ncallbacks_found);
1183 xprt_set_caller(SVCXPRT *xprt, struct finfo *fi)
1187 *(svc_getrpccaller(xprt)) = *(fi->caller_addr);
1188 xidp = __rpcb_get_dg_xidp(xprt);
1189 *xidp = fi->caller_xid;
1193 * Call svcerr_systemerr() only if RPCBVERS4
1196 send_svcsyserr(SVCXPRT *xprt, struct finfo *fi)
1198 if (fi->reply_type == RPCBPROC_INDIRECT) {
1199 xprt_set_caller(xprt, fi);
1200 svcerr_systemerr(xprt);
1206 handle_reply(int fd, SVCXPRT *xprt)
1209 struct rpc_msg reply_msg;
1210 struct rpc_err reply_error;
1213 int inlen, pos, len;
1214 struct r_rmtcall_args a;
1215 struct sockaddr_storage ss;
1217 #ifdef SVC_RUN_DEBUG
1221 buffer = malloc(RPC_BUF_MAX);
1226 fromlen = sizeof(ss);
1227 inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0,
1228 (struct sockaddr *)&ss, &fromlen);
1229 } while (inlen < 0 && errno == EINTR);
1233 "handle_reply: recvfrom returned %d, errno %d\n", inlen, errno);
1237 reply_msg.acpted_rply.ar_verf = _null_auth;
1238 reply_msg.acpted_rply.ar_results.where = 0;
1239 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
1241 xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE);
1242 if (!xdr_replymsg(&reply_xdrs, &reply_msg)) {
1244 (void) fprintf(stderr,
1245 "handle_reply: xdr_replymsg failed\n");
1248 fi = forward_find(reply_msg.rm_xid);
1249 #ifdef SVC_RUN_DEBUG
1251 fprintf(stderr, "handle_reply: reply xid: %d fi addr: %p\n",
1252 reply_msg.rm_xid, fi);
1258 _seterr_reply(&reply_msg, &reply_error);
1259 if (reply_error.re_status != RPC_SUCCESS) {
1261 (void) fprintf(stderr, "handle_reply: %s\n",
1262 clnt_sperrno(reply_error.re_status));
1263 send_svcsyserr(xprt, fi);
1266 pos = XDR_GETPOS(&reply_xdrs);
1268 a.rmt_args.args = &buffer[pos];
1269 a.rmt_args.arglen = len;
1270 a.rmt_uaddr = fi->uaddr;
1271 a.rmt_localvers = fi->versnum;
1273 xprt_set_caller(xprt, fi);
1274 #ifdef SVC_RUN_DEBUG
1275 uaddr = taddr2uaddr(rpcbind_get_conf("udp"),
1276 svc_getrpccaller(xprt));
1278 fprintf(stderr, "handle_reply: forwarding address %s to %s\n",
1279 a.rmt_uaddr, uaddr ? uaddr : "unknown");
1284 svc_sendreply(xprt, (xdrproc_t) xdr_rmtcall_result, (char *) &a);
1289 if (reply_msg.rm_xid == 0) {
1290 #ifdef SVC_RUN_DEBUG
1292 fprintf(stderr, "handle_reply: NULL xid on exit!\n");
1296 (void) free_slot_by_xid(reply_msg.rm_xid);
1301 find_versions(rpcprog_t prog, char *netid, rpcvers_t *lowvp, rpcvers_t *highvp)
1303 register rpcblist_ptr rbl;
1304 unsigned int lowv = 0;
1305 unsigned int highv = 0;
1307 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1308 if ((rbl->rpcb_map.r_prog != prog) ||
1309 ((rbl->rpcb_map.r_netid != NULL) &&
1310 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1313 highv = rbl->rpcb_map.r_vers;
1315 } else if (rbl->rpcb_map.r_vers < lowv) {
1316 lowv = rbl->rpcb_map.r_vers;
1317 } else if (rbl->rpcb_map.r_vers > highv) {
1318 highv = rbl->rpcb_map.r_vers;
1327 * returns the item with the given program, version number and netid.
1328 * If that version number is not found, it returns the item with that
1329 * program number, so that address is now returned to the caller. The
1330 * caller when makes a call to this program, version number, the call
1331 * will fail and it will return with PROGVERS_MISMATCH. The user can
1332 * then determine the highest and the lowest version number for this
1333 * program using clnt_geterr() and use those program version numbers.
1335 * Returns the RPCBLIST for the given prog, vers and netid
1338 find_service(rpcprog_t prog, rpcvers_t vers, char *netid)
1340 register rpcblist_ptr hit = NULL;
1341 register rpcblist_ptr rbl;
1343 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1344 if ((rbl->rpcb_map.r_prog != prog) ||
1345 ((rbl->rpcb_map.r_netid != NULL) &&
1346 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1349 if (rbl->rpcb_map.r_vers == vers)
1356 * Copies the name associated with the uid of the caller and returns
1357 * a pointer to it. Similar to getwd().
1360 getowner(SVCXPRT *transp, char *owner, size_t ownersize)
1364 if (__rpc_get_local_uid(transp, &uid) < 0)
1365 strlcpy(owner, "unknown", ownersize);
1367 strlcpy(owner, "superuser", ownersize);
1369 snprintf(owner, ownersize, "%d", uid);
1376 * Add this to the pmap list only if it is UDP or TCP.
1379 add_pmaplist(RPCB *arg)
1382 struct pmaplist *pml;
1383 int h1, h2, h3, h4, p1, p2;
1385 if (strcmp(arg->r_netid, udptrans) == 0) {
1387 pmap.pm_prot = IPPROTO_UDP;
1388 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1390 pmap.pm_prot = IPPROTO_TCP;
1392 /* Not an IP protocol */
1395 /* interpret the universal address for TCP/IP */
1396 if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d",
1397 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
1399 pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff);
1400 pmap.pm_prog = arg->r_prog;
1401 pmap.pm_vers = arg->r_vers;
1403 * add to END of list
1405 pml = malloc(sizeof (struct pmaplist));
1407 (void) syslog(LOG_ERR, "rpcbind: no memory!\n");
1410 pml->pml_map = pmap;
1411 pml->pml_next = NULL;
1412 if (list_pml == NULL) {
1415 struct pmaplist *fnd;
1417 /* Attach to the end of the list */
1418 for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next)
1420 fnd->pml_next = pml;
1426 * Delete this from the pmap list only if it is UDP or TCP.
1429 del_pmaplist(RPCB *arg)
1431 struct pmaplist *pml;
1432 struct pmaplist *prevpml, *fnd;
1435 if (strcmp(arg->r_netid, udptrans) == 0) {
1438 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1441 } else if (arg->r_netid[0] == 0) {
1442 prot = 0; /* Remove all occurrences */
1444 /* Not an IP protocol */
1447 for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) {
1448 if ((pml->pml_map.pm_prog != arg->r_prog) ||
1449 (pml->pml_map.pm_vers != arg->r_vers) ||
1450 (prot && (pml->pml_map.pm_prot != prot))) {
1451 /* both pml & prevpml move forwards */
1453 pml = pml->pml_next;
1456 /* found it; pml moves forward, prevpml stays */
1458 pml = pml->pml_next;
1459 if (prevpml == NULL)
1462 prevpml->pml_next = pml;
1467 #endif /* PORTMAP */