1 /* $NetBSD: rpcb_svc_com.c,v 1.9 2002/11/08 00:16:39 fvdl Exp $ */
5 * SPDX-License-Identifier: BSD-3-Clause
7 * Copyright (c) 2009, Sun Microsystems, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions are met:
12 * - Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 * - Redistributions in binary form must reproduce the above copyright notice,
15 * this list of conditions and the following disclaimer in the documentation
16 * and/or other materials provided with the distribution.
17 * - Neither the name of Sun Microsystems, Inc. nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
34 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
37 /* #ident "@(#)rpcb_svc_com.c 1.18 94/05/02 SMI" */
41 * The commom server procedure for the rpcbind.
44 #include <sys/types.h>
46 #include <sys/param.h>
48 #include <sys/socket.h>
50 #include <rpc/rpcb_prot.h>
51 #include <rpc/svc_dg.h>
53 #include <netconfig.h>
61 #include <netinet/in.h>
62 #include <rpc/rpc_com.h>
63 #include <rpc/pmap_prot.h>
68 #define RPC_BUF_MAX 65536 /* can be raised if required */
70 static char *nullstring = "";
71 static int rpcb_rmtcalls;
73 struct rmtcallfd_list {
77 struct rmtcallfd_list *next;
81 #define MAXTIME_OFF 300 /* 5 minutes */
85 #define FINFO_ACTIVE 0x1
87 struct netbuf *caller_addr;
88 u_int32_t forward_xid;
95 static struct finfo FINFO[NFORWARD];
98 static bool_t xdr_encap_parms(XDR *, struct encap_parms *);
99 static bool_t xdr_rmtcall_args(XDR *, struct r_rmtcall_args *);
100 static bool_t xdr_rmtcall_result(XDR *, struct r_rmtcall_args *);
101 static bool_t xdr_opaque_parms(XDR *, struct r_rmtcall_args *);
102 static int find_rmtcallfd_by_netid(char *);
103 static SVCXPRT *find_rmtcallxprt_by_fd(int);
104 static int forward_register(u_int32_t, struct netbuf *, int, char *,
105 rpcproc_t, rpcvers_t, u_int32_t *);
106 static struct finfo *forward_find(u_int32_t);
107 static int free_slot_by_xid(u_int32_t);
108 static int free_slot_by_index(int);
109 static int netbufcmp(struct netbuf *, struct netbuf *);
110 static struct netbuf *netbufdup(struct netbuf *);
111 static void netbuffree(struct netbuf *);
112 static int check_rmtcalls(struct pollfd *, int);
113 static void xprt_set_caller(SVCXPRT *, struct finfo *);
114 static void send_svcsyserr(SVCXPRT *, struct finfo *);
115 static void handle_reply(int, SVCXPRT *);
116 static void find_versions(rpcprog_t, char *, rpcvers_t *, rpcvers_t *);
117 static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *);
118 static char *getowner(SVCXPRT *, char *, size_t);
119 static int add_pmaplist(RPCB *);
120 static int del_pmaplist(RPCB *);
123 * Set a mapping of program, version, netid
127 rpcbproc_set_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
128 rpcvers_t rpcbversnum)
130 RPCB *regp = (RPCB *)arg;
136 fprintf(stderr, "RPCB_SET request for (%lu, %lu, %s, %s) : ",
137 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
138 regp->r_netid, regp->r_addr);
140 ans = map_set(regp, getowner(transp, owner, sizeof owner));
143 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
145 /* XXX: should have used some defined constant here */
146 rpcbs_set(rpcbversnum - 2, ans);
151 map_set(RPCB *regp, char *owner)
154 rpcblist_ptr rbl, fnd;
158 * check to see if already used
159 * find_service returns a hit even if
160 * the versions don't match, so check for it
162 fnd = find_service(reg.r_prog, reg.r_vers, reg.r_netid);
163 if (fnd && (fnd->rpcb_map.r_vers == reg.r_vers)) {
164 if (!strcmp(fnd->rpcb_map.r_addr, reg.r_addr))
166 * if these match then it is already
167 * registered so just say "OK".
174 * add to the end of the list
176 rbl = malloc(sizeof (RPCBLIST));
179 a = &(rbl->rpcb_map);
180 a->r_prog = reg.r_prog;
181 a->r_vers = reg.r_vers;
182 a->r_netid = strdup(reg.r_netid);
183 a->r_addr = strdup(reg.r_addr);
184 a->r_owner = strdup(owner);
185 if (!a->r_addr || !a->r_netid || !a->r_owner) {
192 rbl->rpcb_next = (rpcblist_ptr)NULL;
193 if (list_rbl == NULL) {
196 for (fnd = list_rbl; fnd->rpcb_next;
197 fnd = fnd->rpcb_next)
199 fnd->rpcb_next = rbl;
202 (void) add_pmaplist(regp);
208 * Unset a mapping of program, version, netid
212 rpcbproc_unset_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
213 rpcvers_t rpcbversnum)
215 RPCB *regp = (RPCB *)arg;
221 fprintf(stderr, "RPCB_UNSET request for (%lu, %lu, %s) : ",
222 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
225 ans = map_unset(regp, getowner(transp, owner, sizeof owner));
228 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
230 /* XXX: should have used some defined constant here */
231 rpcbs_unset(rpcbversnum - 2, ans);
236 map_unset(RPCB *regp, char *owner)
239 rpcblist_ptr rbl, prev, tmp;
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 */
251 rbl = rbl->rpcb_next;
255 * Check whether appropriate uid. Unset only
256 * if superuser or the owner itself.
258 if (strcmp(owner, "superuser") &&
259 strcmp(rbl->rpcb_map.r_owner, owner))
261 /* found it; rbl moves forward, prev stays */
264 rbl = rbl->rpcb_next;
268 prev->rpcb_next = rbl;
269 free(tmp->rpcb_map.r_addr);
270 free(tmp->rpcb_map.r_netid);
271 free(tmp->rpcb_map.r_owner);
276 (void) del_pmaplist(regp);
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.
287 delete_prog(unsigned int prog)
290 register rpcblist_ptr rbl;
292 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
293 if ((rbl->rpcb_map.r_prog != prog))
295 if (is_bound(rbl->rpcb_map.r_netid, rbl->rpcb_map.r_addr))
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(®, "superuser");
306 rpcbproc_getaddr_com(RPCB *regp, struct svc_req *rqstp __unused,
307 SVCXPRT *transp, rpcvers_t rpcbversnum, rpcvers_t verstype)
313 if (uaddr != NULL && uaddr != nullstring) {
317 fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid);
318 if (fnd && ((verstype == RPCB_ALLVERS) ||
319 (regp->r_vers == fnd->rpcb_map.r_vers))) {
320 if (*(regp->r_addr) != '\0') { /* may contain a hint about */
321 saddr = regp->r_addr; /* the interface that we */
323 if (!(uaddr = mergeaddr(transp, transp->xp_netid,
324 fnd->rpcb_map.r_addr, saddr))) {
325 /* Try whatever we have */
326 uaddr = strdup(fnd->rpcb_map.r_addr);
327 } else if (!uaddr[0]) {
329 * The server died. Unset all versions of this prog.
331 delete_prog(regp->r_prog);
339 fprintf(stderr, "getaddr: %s\n", uaddr);
341 /* XXX: should have used some defined constant here */
342 rpcbs_getaddr(rpcbversnum - 2, regp->r_prog, regp->r_vers,
343 transp->xp_netid, uaddr);
344 return (void *)&uaddr;
349 rpcbproc_gettime_com(void *arg __unused, struct svc_req *rqstp __unused,
350 SVCXPRT *transp __unused, rpcvers_t rpcbversnum __unused)
352 static time_t curtime;
354 (void) time(&curtime);
355 return (void *)&curtime;
359 * Convert uaddr to taddr. Should be used only by
360 * local servers/clients. (kernel level stuff only)
364 rpcbproc_uaddr2taddr_com(void *arg, struct svc_req *rqstp __unused,
365 SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
367 char **uaddrp = (char **)arg;
368 struct netconfig *nconf;
369 static struct netbuf nbuf;
370 static struct netbuf *taddr;
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;
379 return (void *)taddr;
383 * Convert taddr to uaddr. Should be used only by
384 * local servers/clients. (kernel level stuff only)
388 rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp __unused,
389 SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
391 struct netbuf *taddr = (struct netbuf *)arg;
393 struct netconfig *nconf;
398 if ((fd = open("/dev/null", O_RDONLY)) == -1) {
399 uaddr = (char *)strerror(errno);
402 #endif /* CHEW_FDS */
403 if (uaddr != NULL && uaddr != nullstring) {
407 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
408 ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) {
411 return (void *)&uaddr;
416 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
418 return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen),
423 * XDR remote call arguments. It ignores the address part.
424 * written for XDR_DECODE direction only
427 xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap)
429 /* does not get the address or the arguments */
430 if (xdr_rpcprog(xdrs, &(cap->rmt_prog)) &&
431 xdr_rpcvers(xdrs, &(cap->rmt_vers)) &&
432 xdr_rpcproc(xdrs, &(cap->rmt_proc))) {
433 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
439 * XDR remote call results along with the address. Ignore
440 * program number, version number and proc number.
441 * Written for XDR_ENCODE direction only.
444 xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap)
449 if (cap->rmt_localvers == PMAPVERS) {
450 int h1, h2, h3, h4, p1, p2;
453 /* interpret the universal address for TCP/IP */
454 if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d",
455 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
457 port = ((p1 & 0xff) << 8) + (p2 & 0xff);
458 result = xdr_u_long(xdrs, &port);
461 if ((cap->rmt_localvers == RPCBVERS) ||
462 (cap->rmt_localvers == RPCBVERS4)) {
463 result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr));
468 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
473 * only worries about the struct encap_parms part of struct r_rmtcall_args.
474 * The arglen must already be set!!
477 xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap)
479 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
482 static struct rmtcallfd_list *rmthead;
483 static struct rmtcallfd_list *rmttail;
486 create_rmtcall_fd(struct netconfig *nconf)
489 struct rmtcallfd_list *rmt;
492 if ((fd = __rpc_nconf2fd(nconf)) == -1) {
495 "create_rmtcall_fd: couldn't open \"%s\" (errno %d)\n",
496 nconf->nc_device, errno);
499 xprt = svc_tli_create(fd, 0, (struct t_bind *) 0, 0, 0);
503 "create_rmtcall_fd: svc_tli_create failed\n");
506 rmt = malloc(sizeof (struct rmtcallfd_list));
508 syslog(LOG_ERR, "create_rmtcall_fd: no memory!");
512 rmt->netid = strdup(nconf->nc_netid);
513 xprt->xp_netid = rmt->netid;
516 if (rmthead == NULL) {
523 /* XXX not threadsafe */
526 FD_SET(fd, &svc_fdset);
531 find_rmtcallfd_by_netid(char *netid)
533 struct rmtcallfd_list *rmt;
535 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
536 if (strcmp(netid, rmt->netid) == 0) {
544 find_rmtcallxprt_by_fd(int fd)
546 struct rmtcallfd_list *rmt;
548 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
558 * Call a remote procedure service. This procedure is very quiet when things
559 * go wrong. The proc is written to support broadcast rpc. In the broadcast
560 * case, a machine should shut-up instead of complain, lest the requestor be
561 * overrun with complaints at the expense of not hearing a valid reply.
562 * When receiving a request and verifying that the service exists, we
564 * receive the request
566 * open a new TLI endpoint on the same transport on which we received
567 * the original request
569 * remember the original request's XID (which requires knowing the format
570 * of the svc_dg_data structure)
572 * forward the request, with a new XID, to the requested service,
573 * remembering the XID used to send this request (for later use in
574 * reassociating the answer with the original request), the requestor's
575 * address, the file descriptor on which the forwarded request is
576 * made and the service's address.
578 * mark the file descriptor on which we anticipate receiving a reply from
579 * the service and one to select for in our private svc_run procedure
581 * At some time in the future, a reply will be received from the service to
582 * which we forwarded the request. At that time, we detect that the socket
583 * used was for forwarding (by looking through the finfo structures to see
584 * whether the fd corresponds to one of those) and call handle_reply() to
588 * bundle the reply, along with the service's universal address
590 * create a SVCXPRT structure and use a version of svc_sendreply
591 * that allows us to specify the reply XID and destination, send the reply
592 * to the original requestor.
596 rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp,
597 rpcproc_t reply_type, rpcvers_t versnum)
599 register rpcblist_ptr rbl;
600 struct netconfig *nconf;
601 struct netbuf *caller;
602 struct r_rmtcall_args a;
603 char *buf_alloc = NULL, *outbufp;
604 char *outbuf_alloc = NULL;
605 char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX];
606 struct netbuf *na = (struct netbuf *) NULL;
607 struct rpc_msg call_msg;
613 char *uaddr, *m_uaddr = NULL, *local_uaddr = NULL;
615 struct __rpc_sockinfo si;
616 struct sockaddr *localsa;
619 if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) {
620 if (reply_type == RPCBPROC_INDIRECT)
621 svcerr_systemerr(transp);
624 if (si.si_socktype != SOCK_DGRAM)
625 return; /* Only datagram type accepted */
626 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE);
627 if (sendsz == 0) { /* data transfer not supported */
628 if (reply_type == RPCBPROC_INDIRECT)
629 svcerr_systemerr(transp);
633 * Should be multiple of 4 for XDR.
635 sendsz = roundup(sendsz, 4);
636 if (sendsz > RPC_BUF_MAX) {
638 buf_alloc = alloca(sendsz); /* not in IDR2? */
640 buf_alloc = malloc(sendsz);
642 if (buf_alloc == NULL) {
645 "rpcbproc_callit_com: No Memory!\n");
646 if (reply_type == RPCBPROC_INDIRECT)
647 svcerr_systemerr(transp);
650 a.rmt_args.args = buf_alloc;
652 a.rmt_args.args = buf;
655 call_msg.rm_xid = 0; /* For error checking purposes */
656 if (!svc_getargs(transp, (xdrproc_t) xdr_rmtcall_args, (char *) &a)) {
657 if (reply_type == RPCBPROC_INDIRECT)
658 svcerr_decode(transp);
661 "rpcbproc_callit_com: svc_getargs failed\n");
665 if (!check_callit(transp, &a, versnum)) {
666 svcerr_weakauth(transp);
670 caller = svc_getrpccaller(transp);
673 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller);
674 fprintf(stderr, "%s %s req for (%lu, %lu, %lu, %s) from %s : ",
675 versnum == PMAPVERS ? "pmap_rmtcall" :
676 versnum == RPCBVERS ? "rpcb_rmtcall" :
677 versnum == RPCBVERS4 ? "rpcb_indirect" : "unknown",
678 reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit",
679 (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers,
680 (unsigned long)a.rmt_proc, transp->xp_netid,
681 uaddr ? uaddr : "unknown");
686 rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid);
688 rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers,
689 a.rmt_proc, transp->xp_netid, rbl);
691 if (rbl == (rpcblist_ptr)NULL) {
694 fprintf(stderr, "not found\n");
696 if (reply_type == RPCBPROC_INDIRECT)
697 svcerr_noprog(transp);
700 if (rbl->rpcb_map.r_vers != a.rmt_vers) {
701 if (reply_type == RPCBPROC_INDIRECT) {
702 rpcvers_t vers_low, vers_high;
704 find_versions(a.rmt_prog, transp->xp_netid,
705 &vers_low, &vers_high);
706 svcerr_progvers(transp, vers_low, vers_high);
713 fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr);
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).
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);
731 nconf = rpcbind_get_conf(transp->xp_netid);
732 if (nconf == (struct netconfig *)NULL) {
733 if (reply_type == RPCBPROC_INDIRECT)
734 svcerr_systemerr(transp);
737 "rpcbproc_callit_com: rpcbind_get_conf failed\n");
740 localsa = local_sa(((struct sockaddr *)caller->buf)->sa_family);
741 if (localsa == NULL) {
744 "rpcbproc_callit_com: no local address\n");
747 tbuf.len = tbuf.maxlen = localsa->sa_len;
750 addrmerge(&tbuf, rbl->rpcb_map.r_addr, NULL, nconf->nc_netid);
751 m_uaddr = addrmerge(caller, rbl->rpcb_map.r_addr, NULL,
755 fprintf(stderr, "merged uaddr %s\n", m_uaddr);
757 if ((fd = find_rmtcallfd_by_netid(nconf->nc_netid)) == -1) {
758 if (reply_type == RPCBPROC_INDIRECT)
759 svcerr_systemerr(transp);
762 xidp = __rpcb_get_dg_xidp(transp);
763 switch (forward_register(*xidp, caller, fd, m_uaddr, reply_type,
764 versnum, &call_msg.rm_xid)) {
766 /* Success; forward_register() will free m_uaddr for us. */
771 * A duplicate request for the slow server. Let's not
772 * beat on it any more.
776 "rpcbproc_callit_com: duplicate request\n");
779 /* forward_register failed. Perhaps no memory. */
782 "rpcbproc_callit_com: forward_register failed\n");
789 "rpcbproc_callit_com: original XID %x, new XID %x\n",
790 *xidp, call_msg.rm_xid);
792 call_msg.rm_direction = CALL;
793 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
794 call_msg.rm_call.cb_prog = a.rmt_prog;
795 call_msg.rm_call.cb_vers = a.rmt_vers;
796 if (sendsz > RPC_BUF_MAX) {
798 outbuf_alloc = alloca(sendsz); /* not in IDR2? */
800 outbuf_alloc = malloc(sendsz);
802 if (outbuf_alloc == NULL) {
803 if (reply_type == RPCBPROC_INDIRECT)
804 svcerr_systemerr(transp);
807 "rpcbproc_callit_com: No memory!\n");
810 xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE);
812 xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE);
814 if (!xdr_callhdr(&outxdr, &call_msg)) {
815 if (reply_type == RPCBPROC_INDIRECT)
816 svcerr_systemerr(transp);
819 "rpcbproc_callit_com: xdr_callhdr failed\n");
822 if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) {
823 if (reply_type == RPCBPROC_INDIRECT)
824 svcerr_systemerr(transp);
827 "rpcbproc_callit_com: xdr_u_long failed\n");
831 if (rqstp->rq_cred.oa_flavor == AUTH_NULL) {
832 auth = authnone_create();
833 } else if (rqstp->rq_cred.oa_flavor == AUTH_SYS) {
834 struct authunix_parms *au;
836 au = (struct authunix_parms *)rqstp->rq_clntcred;
837 auth = authunix_create(au->aup_machname,
838 au->aup_uid, au->aup_gid,
839 au->aup_len, au->aup_gids);
840 if (auth == NULL) /* fall back */
841 auth = authnone_create();
843 /* we do not support any other authentication scheme */
846 "rpcbproc_callit_com: oa_flavor != AUTH_NONE and oa_flavor != AUTH_SYS\n");
847 if (reply_type == RPCBPROC_INDIRECT)
848 svcerr_weakauth(transp); /* XXX too strong.. */
852 if (reply_type == RPCBPROC_INDIRECT)
853 svcerr_systemerr(transp);
856 "rpcbproc_callit_com: authwhatever_create returned NULL\n");
859 if (!AUTH_MARSHALL(auth, &outxdr)) {
860 if (reply_type == RPCBPROC_INDIRECT)
861 svcerr_systemerr(transp);
865 "rpcbproc_callit_com: AUTH_MARSHALL failed\n");
869 if (!xdr_opaque_parms(&outxdr, &a)) {
870 if (reply_type == RPCBPROC_INDIRECT)
871 svcerr_systemerr(transp);
874 "rpcbproc_callit_com: xdr_opaque_parms failed\n");
877 outlen = (int) XDR_GETPOS(&outxdr);
879 outbufp = outbuf_alloc;
883 na = uaddr2taddr(nconf, local_uaddr);
885 if (reply_type == RPCBPROC_INDIRECT)
886 svcerr_systemerr(transp);
890 if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len)
894 "rpcbproc_callit_com: sendto failed: errno %d\n", errno);
895 if (reply_type == RPCBPROC_INDIRECT)
896 svcerr_systemerr(transp);
902 if (call_msg.rm_xid != 0)
903 (void) free_slot_by_xid(call_msg.rm_xid);
913 * Makes an entry into the FIFO for the given request.
914 * Returns 1 on success, 0 if this is a duplicate request, or -1 on error.
915 * *callxidp is set to the xid of the call.
918 forward_register(u_int32_t caller_xid, struct netbuf *caller_addr,
919 int forward_fd, char *uaddr, rpcproc_t reply_type,
920 rpcvers_t versnum, u_int32_t *callxidp)
924 time_t min_time, time_now;
925 static u_int32_t lastxid;
928 min_time = FINFO[0].time;
929 time_now = time((time_t *)0);
932 lastxid = time_now * NFORWARD;
935 * Check if it is a duplicate entry. Then,
936 * try to find an empty slot. If not available, then
937 * use the slot with the earliest time.
939 for (i = 0; i < NFORWARD; i++) {
940 if (FINFO[i].flag & FINFO_ACTIVE) {
941 if ((FINFO[i].caller_xid == caller_xid) &&
942 (FINFO[i].reply_type == reply_type) &&
943 (FINFO[i].versnum == versnum) &&
944 (!netbufcmp(FINFO[i].caller_addr,
946 FINFO[i].time = time((time_t *)0);
947 return (0); /* Duplicate entry */
949 /* Should we wait any longer */
950 if ((time_now - FINFO[i].time) > MAXTIME_OFF)
951 (void) free_slot_by_index(i);
955 if ((FINFO[i].flag & FINFO_ACTIVE) == 0) {
957 } else if (FINFO[i].time < min_time) {
959 min_time = FINFO[i].time;
964 /* use this empty slot */
967 (void) free_slot_by_index(j);
969 if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) {
972 rpcb_rmtcalls++; /* no of pending calls */
973 FINFO[j].flag = FINFO_ACTIVE;
974 FINFO[j].reply_type = reply_type;
975 FINFO[j].versnum = versnum;
976 FINFO[j].time = time_now;
977 FINFO[j].caller_xid = caller_xid;
978 FINFO[j].forward_fd = forward_fd;
980 * Though uaddr is not allocated here, it will still be freed
981 * from free_slot_*().
983 FINFO[j].uaddr = uaddr;
984 lastxid = lastxid + NFORWARD;
985 /* Don't allow a zero xid below. */
986 if ((u_int32_t)(lastxid + NFORWARD) <= NFORWARD)
988 FINFO[j].forward_xid = lastxid + j; /* encode slot */
989 *callxidp = FINFO[j].forward_xid; /* forward on this xid */
993 static struct finfo *
994 forward_find(u_int32_t reply_xid)
998 i = reply_xid % (u_int32_t)NFORWARD;
999 if ((FINFO[i].flag & FINFO_ACTIVE) &&
1000 (FINFO[i].forward_xid == reply_xid)) {
1007 free_slot_by_xid(u_int32_t xid)
1011 entry = xid % (u_int32_t)NFORWARD;
1012 return (free_slot_by_index(entry));
1016 free_slot_by_index(int index)
1021 if (fi->flag & FINFO_ACTIVE) {
1022 netbuffree(fi->caller_addr);
1023 /* XXX may be too big, but can't access xprt array here */
1024 if (fi->forward_fd >= svc_maxfd)
1027 fi->flag &= ~FINFO_ACTIVE;
1035 netbufcmp(struct netbuf *n1, struct netbuf *n2)
1037 return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len));
1041 netbuf_copybuf(struct netbuf *dst, const struct netbuf *src)
1043 assert(src->len <= src->maxlen);
1045 if (dst->maxlen < src->len || dst->buf == NULL) {
1047 if ((dst->buf = calloc(1, src->maxlen)) == NULL)
1049 dst->maxlen = src->maxlen;
1052 dst->len = src->len;
1053 memcpy(dst->buf, src->buf, src->len);
1058 static struct netbuf *
1059 netbufdup(struct netbuf *ap)
1063 if ((np = calloc(1, sizeof(struct netbuf))) == NULL)
1065 if (netbuf_copybuf(np, ap) == FALSE) {
1073 netbuffree(struct netbuf *ap)
1084 #define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)
1085 extern bool_t __svc_clean_idle(fd_set *, int, bool_t);
1091 struct pollfd pollfds[FD_SETSIZE + 1];
1092 int poll_ret, check_ret;
1094 #ifdef SVC_RUN_DEBUG
1097 register struct pollfd *p;
1102 p->fd = terminate_rfd;
1103 p->events = MASKVAL;
1105 for (n = 0; n <= svc_maxfd; n++) {
1106 if (FD_ISSET(n, &svc_fdset)) {
1108 p->events = MASKVAL;
1114 #ifdef SVC_RUN_DEBUG
1116 fprintf(stderr, "polling for read on fd < ");
1117 for (i = 0, p = pollfds; i < nfds; i++, p++)
1119 fprintf(stderr, "%d ", p->fd);
1120 fprintf(stderr, ">\n");
1123 poll_ret = poll(pollfds, nfds, 30 * 1000);
1125 if (doterminate != 0) {
1126 close(rpcbindlockfd);
1129 "rpcbind terminating on signal %d. Restart with \"rpcbind -w\"",
1131 write_warmstart(); /* Dump yourself */
1139 * We ignore all errors, continuing with the assumption
1140 * that it was set by the signal handlers (or any
1141 * other outside event) and not caused by poll().
1144 cleanfds = svc_fdset;
1145 __svc_clean_idle(&cleanfds, 30, FALSE);
1148 #ifdef SVC_RUN_DEBUG
1150 fprintf(stderr, "poll returned read fds < ");
1151 for (i = 0, p = pollfds; i < nfds; i++, p++)
1153 fprintf(stderr, "%d ", p->fd);
1154 fprintf(stderr, ">\n");
1158 * If we found as many replies on callback fds
1159 * as the number of descriptors selectable which
1160 * poll() returned, there can be no more so we
1161 * don't call svc_getreq_poll. Otherwise, there
1162 * must be another so we must call svc_getreq_poll.
1164 if ((check_ret = check_rmtcalls(pollfds, nfds)) ==
1167 svc_getreq_poll(pollfds, poll_ret-check_ret);
1169 #ifdef SVC_RUN_DEBUG
1171 fprintf(stderr, "svc_maxfd now %u\n", svc_maxfd);
1178 check_rmtcalls(struct pollfd *pfds, int nfds)
1180 int j, ncallbacks_found = 0, rmtcalls_pending;
1183 if (rpcb_rmtcalls == 0)
1186 rmtcalls_pending = rpcb_rmtcalls;
1187 for (j = 0; j < nfds; j++) {
1188 if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) {
1189 if (pfds[j].revents) {
1191 #ifdef DEBUG_RMTCALL
1194 "my_svc_run: polled on forwarding fd %d, netid %s - calling handle_reply\n",
1195 pfds[j].fd, xprt->xp_netid);
1197 handle_reply(pfds[j].fd, xprt);
1198 pfds[j].revents = 0;
1199 if (ncallbacks_found >= rmtcalls_pending) {
1205 return (ncallbacks_found);
1209 xprt_set_caller(SVCXPRT *xprt, struct finfo *fi)
1213 netbuf_copybuf(svc_getrpccaller(xprt), fi->caller_addr);
1214 xidp = __rpcb_get_dg_xidp(xprt);
1215 *xidp = fi->caller_xid;
1219 * Call svcerr_systemerr() only if RPCBVERS4
1222 send_svcsyserr(SVCXPRT *xprt, struct finfo *fi)
1224 if (fi->reply_type == RPCBPROC_INDIRECT) {
1225 xprt_set_caller(xprt, fi);
1226 svcerr_systemerr(xprt);
1232 handle_reply(int fd, SVCXPRT *xprt)
1235 struct rpc_msg reply_msg;
1236 struct rpc_err reply_error;
1239 int inlen, pos, len;
1240 struct r_rmtcall_args a;
1241 struct sockaddr_storage ss;
1243 #ifdef SVC_RUN_DEBUG
1247 buffer = malloc(RPC_BUF_MAX);
1252 fromlen = sizeof(ss);
1253 inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0,
1254 (struct sockaddr *)&ss, &fromlen);
1255 } while (inlen < 0 && errno == EINTR);
1259 "handle_reply: recvfrom returned %d, errno %d\n", inlen, errno);
1263 reply_msg.acpted_rply.ar_verf = _null_auth;
1264 reply_msg.acpted_rply.ar_results.where = 0;
1265 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
1267 xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE);
1268 if (!xdr_replymsg(&reply_xdrs, &reply_msg)) {
1270 (void) fprintf(stderr,
1271 "handle_reply: xdr_replymsg failed\n");
1274 fi = forward_find(reply_msg.rm_xid);
1275 #ifdef SVC_RUN_DEBUG
1277 fprintf(stderr, "handle_reply: reply xid: %d fi addr: %p\n",
1278 reply_msg.rm_xid, fi);
1284 _seterr_reply(&reply_msg, &reply_error);
1285 if (reply_error.re_status != RPC_SUCCESS) {
1287 (void) fprintf(stderr, "handle_reply: %s\n",
1288 clnt_sperrno(reply_error.re_status));
1289 send_svcsyserr(xprt, fi);
1292 pos = XDR_GETPOS(&reply_xdrs);
1294 a.rmt_args.args = &buffer[pos];
1295 a.rmt_args.arglen = len;
1296 a.rmt_uaddr = fi->uaddr;
1297 a.rmt_localvers = fi->versnum;
1299 xprt_set_caller(xprt, fi);
1300 #ifdef SVC_RUN_DEBUG
1301 uaddr = taddr2uaddr(rpcbind_get_conf("udp"),
1302 svc_getrpccaller(xprt));
1304 fprintf(stderr, "handle_reply: forwarding address %s to %s\n",
1305 a.rmt_uaddr, uaddr ? uaddr : "unknown");
1309 svc_sendreply(xprt, (xdrproc_t) xdr_rmtcall_result, (char *) &a);
1313 if (reply_msg.rm_xid == 0) {
1314 #ifdef SVC_RUN_DEBUG
1316 fprintf(stderr, "handle_reply: NULL xid on exit!\n");
1320 (void) free_slot_by_xid(reply_msg.rm_xid);
1325 find_versions(rpcprog_t prog, char *netid, rpcvers_t *lowvp, rpcvers_t *highvp)
1327 register rpcblist_ptr rbl;
1328 unsigned int lowv = 0;
1329 unsigned int highv = 0;
1331 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1332 if ((rbl->rpcb_map.r_prog != prog) ||
1333 ((rbl->rpcb_map.r_netid != NULL) &&
1334 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1337 highv = rbl->rpcb_map.r_vers;
1339 } else if (rbl->rpcb_map.r_vers < lowv) {
1340 lowv = rbl->rpcb_map.r_vers;
1341 } else if (rbl->rpcb_map.r_vers > highv) {
1342 highv = rbl->rpcb_map.r_vers;
1351 * returns the item with the given program, version number and netid.
1352 * If that version number is not found, it returns the item with that
1353 * program number, so that address is now returned to the caller. The
1354 * caller when makes a call to this program, version number, the call
1355 * will fail and it will return with PROGVERS_MISMATCH. The user can
1356 * then determine the highest and the lowest version number for this
1357 * program using clnt_geterr() and use those program version numbers.
1359 * Returns the RPCBLIST for the given prog, vers and netid
1362 find_service(rpcprog_t prog, rpcvers_t vers, char *netid)
1364 register rpcblist_ptr hit = NULL;
1365 register rpcblist_ptr rbl;
1367 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1368 if ((rbl->rpcb_map.r_prog != prog) ||
1369 ((rbl->rpcb_map.r_netid != NULL) &&
1370 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1373 if (rbl->rpcb_map.r_vers == vers)
1380 * Copies the name associated with the uid of the caller and returns
1381 * a pointer to it. Similar to getwd().
1384 getowner(SVCXPRT *transp, char *owner, size_t ownersize)
1388 if (__rpc_get_local_uid(transp, &uid) < 0)
1389 strlcpy(owner, "unknown", ownersize);
1391 strlcpy(owner, "superuser", ownersize);
1393 snprintf(owner, ownersize, "%d", uid);
1400 * Add this to the pmap list only if it is UDP or TCP.
1403 add_pmaplist(RPCB *arg)
1406 struct pmaplist *pml;
1407 int h1, h2, h3, h4, p1, p2;
1409 if (strcmp(arg->r_netid, udptrans) == 0) {
1411 pmap.pm_prot = IPPROTO_UDP;
1412 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1414 pmap.pm_prot = IPPROTO_TCP;
1416 /* Not an IP protocol */
1419 /* interpret the universal address for TCP/IP */
1420 if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d",
1421 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
1423 pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff);
1424 pmap.pm_prog = arg->r_prog;
1425 pmap.pm_vers = arg->r_vers;
1427 * add to END of list
1429 pml = malloc(sizeof (struct pmaplist));
1431 (void) syslog(LOG_ERR, "rpcbind: no memory!\n");
1434 pml->pml_map = pmap;
1435 pml->pml_next = NULL;
1436 if (list_pml == NULL) {
1439 struct pmaplist *fnd;
1441 /* Attach to the end of the list */
1442 for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next)
1444 fnd->pml_next = pml;
1450 * Delete this from the pmap list only if it is UDP or TCP.
1453 del_pmaplist(RPCB *arg)
1455 struct pmaplist *pml;
1456 struct pmaplist *prevpml, *fnd;
1459 if (strcmp(arg->r_netid, udptrans) == 0) {
1462 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1465 } else if (arg->r_netid[0] == 0) {
1466 prot = 0; /* Remove all occurrences */
1468 /* Not an IP protocol */
1471 for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) {
1472 if ((pml->pml_map.pm_prog != arg->r_prog) ||
1473 (pml->pml_map.pm_vers != arg->r_vers) ||
1474 (prot && (pml->pml_map.pm_prot != prot))) {
1475 /* both pml & prevpml move forwards */
1477 pml = pml->pml_next;
1480 /* found it; pml moves forward, prevpml stays */
1482 pml = pml->pml_next;
1483 if (prevpml == NULL)
1486 prevpml->pml_next = pml;
1491 #endif /* PORTMAP */