1 /* $NetBSD: rpcb_svc_com.c,v 1.9 2002/11/08 00:16:39 fvdl Exp $ */
5 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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18 * modification or enhancement.
20 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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22 * OR ANY PART THEREOF.
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25 * or profits or other special, indirect and consequential damages, even if
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33 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
36 /* #ident "@(#)rpcb_svc_com.c 1.18 94/05/02 SMI" */
40 * The commom server procedure for the rpcbind.
43 #include <sys/types.h>
45 #include <sys/param.h>
47 #include <sys/socket.h>
49 #include <rpc/rpcb_prot.h>
50 #include <rpc/svc_dg.h>
51 #include <netconfig.h>
57 #include <netinet/in.h>
58 #include <rpc/pmap_prot.h>
65 #define RPC_BUF_MAX 65536 /* can be raised if required */
67 static char *nullstring = "";
68 static int rpcb_rmtcalls;
70 struct rmtcallfd_list {
74 struct rmtcallfd_list *next;
78 #define MAXTIME_OFF 300 /* 5 minutes */
82 #define FINFO_ACTIVE 0x1
84 struct netbuf *caller_addr;
85 u_int32_t forward_xid;
92 static struct finfo FINFO[NFORWARD];
95 static bool_t xdr_encap_parms(XDR *, struct encap_parms *);
96 static bool_t xdr_rmtcall_args(XDR *, struct r_rmtcall_args *);
97 static bool_t xdr_rmtcall_result(XDR *, struct r_rmtcall_args *);
98 static bool_t xdr_opaque_parms(XDR *, struct r_rmtcall_args *);
99 static int find_rmtcallfd_by_netid(char *);
100 static SVCXPRT *find_rmtcallxprt_by_fd(int);
101 static int forward_register(u_int32_t, struct netbuf *, int, char *,
102 rpcproc_t, rpcvers_t, u_int32_t *);
103 static struct finfo *forward_find(u_int32_t);
104 static int free_slot_by_xid(u_int32_t);
105 static int free_slot_by_index(int);
106 static int netbufcmp(struct netbuf *, struct netbuf *);
107 static struct netbuf *netbufdup(struct netbuf *);
108 static void netbuffree(struct netbuf *);
109 static int check_rmtcalls(struct pollfd *, int);
110 static void xprt_set_caller(SVCXPRT *, struct finfo *);
111 static void send_svcsyserr(SVCXPRT *, struct finfo *);
112 static void handle_reply(int, SVCXPRT *);
113 static void find_versions(rpcprog_t, char *, rpcvers_t *, rpcvers_t *);
114 static rpcblist_ptr find_service(rpcprog_t, rpcvers_t, char *);
115 static char *getowner(SVCXPRT *, char *, size_t);
116 static int add_pmaplist(RPCB *);
117 static int del_pmaplist(RPCB *);
120 * Set a mapping of program, version, netid
124 rpcbproc_set_com(void *arg, struct svc_req *rqstp __unused, SVCXPRT *transp,
125 rpcvers_t rpcbversnum)
127 RPCB *regp = (RPCB *)arg;
133 fprintf(stderr, "RPCB_SET request for (%lu, %lu, %s, %s) : ",
134 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
135 regp->r_netid, regp->r_addr);
137 ans = map_set(regp, getowner(transp, owner, sizeof owner));
140 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
142 /* XXX: should have used some defined constant here */
143 rpcbs_set(rpcbversnum - 2, ans);
148 map_set(RPCB *regp, char *owner)
151 rpcblist_ptr rbl, fnd;
155 * check to see if already used
156 * find_service returns a hit even if
157 * the versions don't match, so check for it
159 fnd = find_service(reg.r_prog, reg.r_vers, reg.r_netid);
160 if (fnd && (fnd->rpcb_map.r_vers == reg.r_vers)) {
161 if (!strcmp(fnd->rpcb_map.r_addr, reg.r_addr))
163 * if these match then it is already
164 * registered so just say "OK".
171 * add to the end of the list
173 rbl = malloc(sizeof (RPCBLIST));
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) {
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;
377 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
378 ((taddr = uaddr2taddr(nconf, *uaddrp)) == NULL)) {
379 (void) memset((char *)&nbuf, 0, sizeof (struct netbuf));
380 return (void *)&nbuf;
382 return (void *)taddr;
386 * Convert taddr to uaddr. Should be used only by
387 * local servers/clients. (kernel level stuff only)
391 rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp __unused,
392 SVCXPRT *transp, rpcvers_t rpcbversnum __unused)
394 struct netbuf *taddr = (struct netbuf *)arg;
396 struct netconfig *nconf;
401 if ((fd = open("/dev/null", O_RDONLY)) == -1) {
402 uaddr = (char *)strerror(errno);
405 #endif /* CHEW_FDS */
406 if (uaddr != NULL && uaddr != nullstring) {
410 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
411 ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) {
414 return (void *)&uaddr;
419 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
421 return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), ~0));
425 * XDR remote call arguments. It ignores the address part.
426 * written for XDR_DECODE direction only
429 xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap)
431 /* does not get the address or the arguments */
432 if (xdr_u_int32_t(xdrs, &(cap->rmt_prog)) &&
433 xdr_u_int32_t(xdrs, &(cap->rmt_vers)) &&
434 xdr_u_int32_t(xdrs, &(cap->rmt_proc))) {
435 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
441 * XDR remote call results along with the address. Ignore
442 * program number, version number and proc number.
443 * Written for XDR_ENCODE direction only.
446 xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap)
451 if (cap->rmt_localvers == PMAPVERS) {
452 int h1, h2, h3, h4, p1, p2;
455 /* interpret the universal address for TCP/IP */
456 if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d",
457 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
459 port = ((p1 & 0xff) << 8) + (p2 & 0xff);
460 result = xdr_u_long(xdrs, &port);
463 if ((cap->rmt_localvers == RPCBVERS) ||
464 (cap->rmt_localvers == RPCBVERS4)) {
465 result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr));
470 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
475 * only worries about the struct encap_parms part of struct r_rmtcall_args.
476 * The arglen must already be set!!
479 xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap)
481 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
484 static struct rmtcallfd_list *rmthead;
485 static struct rmtcallfd_list *rmttail;
488 create_rmtcall_fd(struct netconfig *nconf)
491 struct rmtcallfd_list *rmt;
494 if ((fd = __rpc_nconf2fd(nconf)) == -1) {
497 "create_rmtcall_fd: couldn't open \"%s\" (errno %d)\n",
498 nconf->nc_device, errno);
501 xprt = svc_tli_create(fd, 0, (struct t_bind *) 0, 0, 0);
505 "create_rmtcall_fd: svc_tli_create failed\n");
508 rmt = malloc(sizeof (struct rmtcallfd_list));
510 syslog(LOG_ERR, "create_rmtcall_fd: no memory!");
514 rmt->netid = strdup(nconf->nc_netid);
515 xprt->xp_netid = rmt->netid;
518 if (rmthead == NULL) {
525 /* XXX not threadsafe */
528 FD_SET(fd, &svc_fdset);
533 find_rmtcallfd_by_netid(char *netid)
535 struct rmtcallfd_list *rmt;
537 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
538 if (strcmp(netid, rmt->netid) == 0) {
546 find_rmtcallxprt_by_fd(int fd)
548 struct rmtcallfd_list *rmt;
550 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
560 * Call a remote procedure service. This procedure is very quiet when things
561 * go wrong. The proc is written to support broadcast rpc. In the broadcast
562 * case, a machine should shut-up instead of complain, lest the requestor be
563 * overrun with complaints at the expense of not hearing a valid reply.
564 * When receiving a request and verifying that the service exists, we
566 * receive the request
568 * open a new TLI endpoint on the same transport on which we received
569 * the original request
571 * remember the original request's XID (which requires knowing the format
572 * of the svc_dg_data structure)
574 * forward the request, with a new XID, to the requested service,
575 * remembering the XID used to send this request (for later use in
576 * reassociating the answer with the original request), the requestor's
577 * address, the file descriptor on which the forwarded request is
578 * made and the service's address.
580 * mark the file descriptor on which we anticipate receiving a reply from
581 * the service and one to select for in our private svc_run procedure
583 * At some time in the future, a reply will be received from the service to
584 * which we forwarded the request. At that time, we detect that the socket
585 * used was for forwarding (by looking through the finfo structures to see
586 * whether the fd corresponds to one of those) and call handle_reply() to
590 * bundle the reply, along with the service's universal address
592 * create a SVCXPRT structure and use a version of svc_sendreply
593 * that allows us to specify the reply XID and destination, send the reply
594 * to the original requestor.
598 rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp,
599 rpcproc_t reply_type, rpcvers_t versnum)
601 register rpcblist_ptr rbl;
602 struct netconfig *nconf;
603 struct netbuf *caller;
604 struct r_rmtcall_args a;
605 char *buf_alloc = NULL, *outbufp;
606 char *outbuf_alloc = NULL;
607 char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX];
608 struct netbuf *na = (struct netbuf *) NULL;
609 struct rpc_msg call_msg;
615 char *uaddr, *m_uaddr = NULL, *local_uaddr = NULL;
617 struct __rpc_sockinfo si;
618 struct sockaddr *localsa;
621 if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) {
622 if (reply_type == RPCBPROC_INDIRECT)
623 svcerr_systemerr(transp);
626 if (si.si_socktype != SOCK_DGRAM)
627 return; /* Only datagram type accepted */
628 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE);
629 if (sendsz == 0) { /* data transfer not supported */
630 if (reply_type == RPCBPROC_INDIRECT)
631 svcerr_systemerr(transp);
635 * Should be multiple of 4 for XDR.
637 sendsz = ((sendsz + 3) / 4) * 4;
638 if (sendsz > RPC_BUF_MAX) {
640 buf_alloc = alloca(sendsz); /* not in IDR2? */
642 buf_alloc = malloc(sendsz);
644 if (buf_alloc == NULL) {
647 "rpcbproc_callit_com: No Memory!\n");
648 if (reply_type == RPCBPROC_INDIRECT)
649 svcerr_systemerr(transp);
652 a.rmt_args.args = buf_alloc;
654 a.rmt_args.args = buf;
657 call_msg.rm_xid = 0; /* For error checking purposes */
658 if (!svc_getargs(transp, (xdrproc_t) xdr_rmtcall_args, (char *) &a)) {
659 if (reply_type == RPCBPROC_INDIRECT)
660 svcerr_decode(transp);
663 "rpcbproc_callit_com: svc_getargs failed\n");
667 if (!check_callit(transp, &a, versnum)) {
668 svcerr_weakauth(transp);
672 caller = svc_getrpccaller(transp);
675 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller);
676 fprintf(stderr, "%s %s req for (%lu, %lu, %lu, %s) from %s : ",
677 versnum == PMAPVERS ? "pmap_rmtcall" :
678 versnum == RPCBVERS ? "rpcb_rmtcall" :
679 versnum == RPCBVERS4 ? "rpcb_indirect" : "unknown",
680 reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit",
681 (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers,
682 (unsigned long)a.rmt_proc, transp->xp_netid,
683 uaddr ? uaddr : "unknown");
689 rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid);
691 rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers,
692 a.rmt_proc, transp->xp_netid, rbl);
694 if (rbl == (rpcblist_ptr)NULL) {
697 fprintf(stderr, "not found\n");
699 if (reply_type == RPCBPROC_INDIRECT)
700 svcerr_noprog(transp);
703 if (rbl->rpcb_map.r_vers != a.rmt_vers) {
704 if (reply_type == RPCBPROC_INDIRECT) {
705 rpcvers_t vers_low, vers_high;
707 find_versions(a.rmt_prog, transp->xp_netid,
708 &vers_low, &vers_high);
709 svcerr_progvers(transp, vers_low, vers_high);
716 fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr);
719 * Check whether this entry is valid and a server is present
720 * Mergeaddr() returns NULL if no such entry is present, and
721 * returns "" if the entry was present but the server is not
722 * present (i.e., it crashed).
724 if (reply_type == RPCBPROC_INDIRECT) {
725 uaddr = mergeaddr(transp, transp->xp_netid,
726 rbl->rpcb_map.r_addr, NULL);
727 if (uaddr == NULL || uaddr[0] == '\0') {
728 svcerr_noprog(transp);
735 nconf = rpcbind_get_conf(transp->xp_netid);
736 if (nconf == (struct netconfig *)NULL) {
737 if (reply_type == RPCBPROC_INDIRECT)
738 svcerr_systemerr(transp);
741 "rpcbproc_callit_com: rpcbind_get_conf failed\n");
744 localsa = local_sa(((struct sockaddr *)caller->buf)->sa_family);
745 if (localsa == NULL) {
748 "rpcbproc_callit_com: no local address\n");
751 tbuf.len = tbuf.maxlen = localsa->sa_len;
754 addrmerge(&tbuf, rbl->rpcb_map.r_addr, NULL, nconf->nc_netid);
755 m_uaddr = addrmerge(caller, rbl->rpcb_map.r_addr, NULL,
759 fprintf(stderr, "merged uaddr %s\n", m_uaddr);
761 if ((fd = find_rmtcallfd_by_netid(nconf->nc_netid)) == -1) {
762 if (reply_type == RPCBPROC_INDIRECT)
763 svcerr_systemerr(transp);
766 xidp = __rpcb_get_dg_xidp(transp);
767 switch (forward_register(*xidp, caller, fd, m_uaddr, reply_type,
768 versnum, &call_msg.rm_xid)) {
770 /* Success; forward_register() will free m_uaddr for us. */
775 * A duplicate request for the slow server. Let's not
776 * beat on it any more.
780 "rpcbproc_callit_com: duplicate request\n");
783 /* forward_register failed. Perhaps no memory. */
786 "rpcbproc_callit_com: forward_register failed\n");
793 "rpcbproc_callit_com: original XID %x, new XID %x\n",
794 *xidp, call_msg.rm_xid);
796 call_msg.rm_direction = CALL;
797 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
798 call_msg.rm_call.cb_prog = a.rmt_prog;
799 call_msg.rm_call.cb_vers = a.rmt_vers;
800 if (sendsz > RPC_BUF_MAX) {
802 outbuf_alloc = alloca(sendsz); /* not in IDR2? */
804 outbuf_alloc = malloc(sendsz);
806 if (outbuf_alloc == NULL) {
807 if (reply_type == RPCBPROC_INDIRECT)
808 svcerr_systemerr(transp);
811 "rpcbproc_callit_com: No memory!\n");
814 xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE);
816 xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE);
818 if (!xdr_callhdr(&outxdr, &call_msg)) {
819 if (reply_type == RPCBPROC_INDIRECT)
820 svcerr_systemerr(transp);
823 "rpcbproc_callit_com: xdr_callhdr failed\n");
826 if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) {
827 if (reply_type == RPCBPROC_INDIRECT)
828 svcerr_systemerr(transp);
831 "rpcbproc_callit_com: xdr_u_long failed\n");
835 if (rqstp->rq_cred.oa_flavor == AUTH_NULL) {
836 auth = authnone_create();
837 } else if (rqstp->rq_cred.oa_flavor == AUTH_SYS) {
838 struct authunix_parms *au;
840 au = (struct authunix_parms *)rqstp->rq_clntcred;
841 auth = authunix_create(au->aup_machname,
842 au->aup_uid, au->aup_gid,
843 au->aup_len, au->aup_gids);
844 if (auth == NULL) /* fall back */
845 auth = authnone_create();
847 /* we do not support any other authentication scheme */
850 "rpcbproc_callit_com: oa_flavor != AUTH_NONE and oa_flavor != AUTH_SYS\n");
851 if (reply_type == RPCBPROC_INDIRECT)
852 svcerr_weakauth(transp); /* XXX too strong.. */
856 if (reply_type == RPCBPROC_INDIRECT)
857 svcerr_systemerr(transp);
860 "rpcbproc_callit_com: authwhatever_create returned NULL\n");
863 if (!AUTH_MARSHALL(auth, &outxdr)) {
864 if (reply_type == RPCBPROC_INDIRECT)
865 svcerr_systemerr(transp);
869 "rpcbproc_callit_com: AUTH_MARSHALL failed\n");
873 if (!xdr_opaque_parms(&outxdr, &a)) {
874 if (reply_type == RPCBPROC_INDIRECT)
875 svcerr_systemerr(transp);
878 "rpcbproc_callit_com: xdr_opaque_parms failed\n");
881 outlen = (int) XDR_GETPOS(&outxdr);
883 outbufp = outbuf_alloc;
887 na = uaddr2taddr(nconf, local_uaddr);
889 if (reply_type == RPCBPROC_INDIRECT)
890 svcerr_systemerr(transp);
894 if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len)
898 "rpcbproc_callit_com: sendto failed: errno %d\n", errno);
899 if (reply_type == RPCBPROC_INDIRECT)
900 svcerr_systemerr(transp);
906 if (call_msg.rm_xid != 0)
907 (void) free_slot_by_xid(call_msg.rm_xid);
924 * Makes an entry into the FIFO for the given request.
925 * Returns 1 on success, 0 if this is a duplicate request, or -1 on error.
926 * *callxidp is set to the xid of the call.
929 forward_register(u_int32_t caller_xid, struct netbuf *caller_addr,
930 int forward_fd, char *uaddr, rpcproc_t reply_type,
931 rpcvers_t versnum, u_int32_t *callxidp)
935 time_t min_time, time_now;
936 static u_int32_t lastxid;
939 min_time = FINFO[0].time;
940 time_now = time((time_t *)0);
943 lastxid = time_now * NFORWARD;
946 * Check if it is a duplicate entry. Then,
947 * try to find an empty slot. If not available, then
948 * use the slot with the earliest time.
950 for (i = 0; i < NFORWARD; i++) {
951 if (FINFO[i].flag & FINFO_ACTIVE) {
952 if ((FINFO[i].caller_xid == caller_xid) &&
953 (FINFO[i].reply_type == reply_type) &&
954 (FINFO[i].versnum == versnum) &&
955 (!netbufcmp(FINFO[i].caller_addr,
957 FINFO[i].time = time((time_t *)0);
958 return (0); /* Duplicate entry */
960 /* Should we wait any longer */
961 if ((time_now - FINFO[i].time) > MAXTIME_OFF)
962 (void) free_slot_by_index(i);
966 if ((FINFO[i].flag & FINFO_ACTIVE) == 0) {
968 } else if (FINFO[i].time < min_time) {
970 min_time = FINFO[i].time;
975 /* use this empty slot */
978 (void) free_slot_by_index(j);
980 if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) {
983 rpcb_rmtcalls++; /* no of pending calls */
984 FINFO[j].flag = FINFO_ACTIVE;
985 FINFO[j].reply_type = reply_type;
986 FINFO[j].versnum = versnum;
987 FINFO[j].time = time_now;
988 FINFO[j].caller_xid = caller_xid;
989 FINFO[j].forward_fd = forward_fd;
991 * Though uaddr is not allocated here, it will still be freed
992 * from free_slot_*().
994 FINFO[j].uaddr = uaddr;
995 lastxid = lastxid + NFORWARD;
996 /* Don't allow a zero xid below. */
997 if ((u_int32_t)(lastxid + NFORWARD) <= NFORWARD)
999 FINFO[j].forward_xid = lastxid + j; /* encode slot */
1000 *callxidp = FINFO[j].forward_xid; /* forward on this xid */
1004 static struct finfo *
1005 forward_find(u_int32_t reply_xid)
1009 i = reply_xid % (u_int32_t)NFORWARD;
1010 if ((FINFO[i].flag & FINFO_ACTIVE) &&
1011 (FINFO[i].forward_xid == reply_xid)) {
1018 free_slot_by_xid(u_int32_t xid)
1022 entry = xid % (u_int32_t)NFORWARD;
1023 return (free_slot_by_index(entry));
1027 free_slot_by_index(int index)
1032 if (fi->flag & FINFO_ACTIVE) {
1033 netbuffree(fi->caller_addr);
1034 /* XXX may be too big, but can't access xprt array here */
1035 if (fi->forward_fd >= svc_maxfd)
1038 fi->flag &= ~FINFO_ACTIVE;
1046 netbufcmp(struct netbuf *n1, struct netbuf *n2)
1048 return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len));
1051 static struct netbuf *
1052 netbufdup(struct netbuf *ap)
1056 if ((np = malloc(sizeof(struct netbuf))) == NULL)
1058 if ((np->buf = malloc(ap->len)) == NULL) {
1062 np->maxlen = np->len = ap->len;
1063 memcpy(np->buf, ap->buf, ap->len);
1068 netbuffree(struct netbuf *ap)
1075 #define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)
1076 extern bool_t __svc_clean_idle(fd_set *, int, bool_t);
1082 struct pollfd pollfds[FD_SETSIZE];
1083 int poll_ret, check_ret;
1085 #ifdef SVC_RUN_DEBUG
1088 register struct pollfd *p;
1093 for (n = 0; n <= svc_maxfd; n++) {
1094 if (FD_ISSET(n, &svc_fdset)) {
1096 p->events = MASKVAL;
1102 #ifdef SVC_RUN_DEBUG
1104 fprintf(stderr, "polling for read on fd < ");
1105 for (i = 0, p = pollfds; i < nfds; i++, p++)
1107 fprintf(stderr, "%d ", p->fd);
1108 fprintf(stderr, ">\n");
1111 switch (poll_ret = poll(pollfds, nfds, 30 * 1000)) {
1114 * We ignore all errors, continuing with the assumption
1115 * that it was set by the signal handlers (or any
1116 * other outside event) and not caused by poll().
1119 cleanfds = svc_fdset;
1120 __svc_clean_idle(&cleanfds, 30, FALSE);
1123 #ifdef SVC_RUN_DEBUG
1125 fprintf(stderr, "poll returned read fds < ");
1126 for (i = 0, p = pollfds; i < nfds; i++, p++)
1128 fprintf(stderr, "%d ", p->fd);
1129 fprintf(stderr, ">\n");
1133 * If we found as many replies on callback fds
1134 * as the number of descriptors selectable which
1135 * poll() returned, there can be no more so we
1136 * don't call svc_getreq_poll. Otherwise, there
1137 * must be another so we must call svc_getreq_poll.
1139 if ((check_ret = check_rmtcalls(pollfds, nfds)) ==
1142 svc_getreq_poll(pollfds, poll_ret-check_ret);
1144 #ifdef SVC_RUN_DEBUG
1146 fprintf(stderr, "svc_maxfd now %u\n", svc_maxfd);
1153 check_rmtcalls(struct pollfd *pfds, int nfds)
1155 int j, ncallbacks_found = 0, rmtcalls_pending;
1158 if (rpcb_rmtcalls == 0)
1161 rmtcalls_pending = rpcb_rmtcalls;
1162 for (j = 0; j < nfds; j++) {
1163 if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) {
1164 if (pfds[j].revents) {
1166 #ifdef DEBUG_RMTCALL
1169 "my_svc_run: polled on forwarding fd %d, netid %s - calling handle_reply\n",
1170 pfds[j].fd, xprt->xp_netid);
1172 handle_reply(pfds[j].fd, xprt);
1173 pfds[j].revents = 0;
1174 if (ncallbacks_found >= rmtcalls_pending) {
1180 return (ncallbacks_found);
1184 xprt_set_caller(SVCXPRT *xprt, struct finfo *fi)
1188 *(svc_getrpccaller(xprt)) = *(fi->caller_addr);
1189 xidp = __rpcb_get_dg_xidp(xprt);
1190 *xidp = fi->caller_xid;
1194 * Call svcerr_systemerr() only if RPCBVERS4
1197 send_svcsyserr(SVCXPRT *xprt, struct finfo *fi)
1199 if (fi->reply_type == RPCBPROC_INDIRECT) {
1200 xprt_set_caller(xprt, fi);
1201 svcerr_systemerr(xprt);
1207 handle_reply(int fd, SVCXPRT *xprt)
1210 struct rpc_msg reply_msg;
1211 struct rpc_err reply_error;
1214 int inlen, pos, len;
1215 struct r_rmtcall_args a;
1216 struct sockaddr_storage ss;
1218 #ifdef SVC_RUN_DEBUG
1222 buffer = malloc(RPC_BUF_MAX);
1227 fromlen = sizeof(ss);
1228 inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0,
1229 (struct sockaddr *)&ss, &fromlen);
1230 } while (inlen < 0 && errno == EINTR);
1234 "handle_reply: recvfrom returned %d, errno %d\n", inlen, errno);
1238 reply_msg.acpted_rply.ar_verf = _null_auth;
1239 reply_msg.acpted_rply.ar_results.where = 0;
1240 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
1242 xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE);
1243 if (!xdr_replymsg(&reply_xdrs, &reply_msg)) {
1245 (void) fprintf(stderr,
1246 "handle_reply: xdr_replymsg failed\n");
1249 fi = forward_find(reply_msg.rm_xid);
1250 #ifdef SVC_RUN_DEBUG
1252 fprintf(stderr, "handle_reply: reply xid: %d fi addr: %p\n",
1253 reply_msg.rm_xid, fi);
1259 _seterr_reply(&reply_msg, &reply_error);
1260 if (reply_error.re_status != RPC_SUCCESS) {
1262 (void) fprintf(stderr, "handle_reply: %s\n",
1263 clnt_sperrno(reply_error.re_status));
1264 send_svcsyserr(xprt, fi);
1267 pos = XDR_GETPOS(&reply_xdrs);
1269 a.rmt_args.args = &buffer[pos];
1270 a.rmt_args.arglen = len;
1271 a.rmt_uaddr = fi->uaddr;
1272 a.rmt_localvers = fi->versnum;
1274 xprt_set_caller(xprt, fi);
1275 #ifdef SVC_RUN_DEBUG
1276 uaddr = taddr2uaddr(rpcbind_get_conf("udp"),
1277 svc_getrpccaller(xprt));
1279 fprintf(stderr, "handle_reply: forwarding address %s to %s\n",
1280 a.rmt_uaddr, uaddr ? uaddr : "unknown");
1285 svc_sendreply(xprt, (xdrproc_t) xdr_rmtcall_result, (char *) &a);
1290 if (reply_msg.rm_xid == 0) {
1291 #ifdef SVC_RUN_DEBUG
1293 fprintf(stderr, "handle_reply: NULL xid on exit!\n");
1297 (void) free_slot_by_xid(reply_msg.rm_xid);
1302 find_versions(rpcprog_t prog, char *netid, rpcvers_t *lowvp, rpcvers_t *highvp)
1304 register rpcblist_ptr rbl;
1305 unsigned int lowv = 0;
1306 unsigned int highv = 0;
1308 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1309 if ((rbl->rpcb_map.r_prog != prog) ||
1310 ((rbl->rpcb_map.r_netid != NULL) &&
1311 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1314 highv = rbl->rpcb_map.r_vers;
1316 } else if (rbl->rpcb_map.r_vers < lowv) {
1317 lowv = rbl->rpcb_map.r_vers;
1318 } else if (rbl->rpcb_map.r_vers > highv) {
1319 highv = rbl->rpcb_map.r_vers;
1328 * returns the item with the given program, version number and netid.
1329 * If that version number is not found, it returns the item with that
1330 * program number, so that address is now returned to the caller. The
1331 * caller when makes a call to this program, version number, the call
1332 * will fail and it will return with PROGVERS_MISMATCH. The user can
1333 * then determine the highest and the lowest version number for this
1334 * program using clnt_geterr() and use those program version numbers.
1336 * Returns the RPCBLIST for the given prog, vers and netid
1339 find_service(rpcprog_t prog, rpcvers_t vers, char *netid)
1341 register rpcblist_ptr hit = NULL;
1342 register rpcblist_ptr rbl;
1344 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1345 if ((rbl->rpcb_map.r_prog != prog) ||
1346 ((rbl->rpcb_map.r_netid != NULL) &&
1347 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1350 if (rbl->rpcb_map.r_vers == vers)
1357 * Copies the name associated with the uid of the caller and returns
1358 * a pointer to it. Similar to getwd().
1361 getowner(SVCXPRT *transp, char *owner, size_t ownersize)
1365 if (__rpc_get_local_uid(transp, &uid) < 0)
1366 strlcpy(owner, "unknown", ownersize);
1368 strlcpy(owner, "superuser", ownersize);
1370 snprintf(owner, ownersize, "%d", uid);
1377 * Add this to the pmap list only if it is UDP or TCP.
1380 add_pmaplist(RPCB *arg)
1383 struct pmaplist *pml;
1384 int h1, h2, h3, h4, p1, p2;
1386 if (strcmp(arg->r_netid, udptrans) == 0) {
1388 pmap.pm_prot = IPPROTO_UDP;
1389 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1391 pmap.pm_prot = IPPROTO_TCP;
1393 /* Not an IP protocol */
1396 /* interpret the universal address for TCP/IP */
1397 if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d",
1398 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
1400 pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff);
1401 pmap.pm_prog = arg->r_prog;
1402 pmap.pm_vers = arg->r_vers;
1404 * add to END of list
1406 pml = malloc(sizeof (struct pmaplist));
1408 (void) syslog(LOG_ERR, "rpcbind: no memory!\n");
1411 pml->pml_map = pmap;
1412 pml->pml_next = NULL;
1413 if (list_pml == NULL) {
1416 struct pmaplist *fnd;
1418 /* Attach to the end of the list */
1419 for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next)
1421 fnd->pml_next = pml;
1427 * Delete this from the pmap list only if it is UDP or TCP.
1430 del_pmaplist(RPCB *arg)
1432 struct pmaplist *pml;
1433 struct pmaplist *prevpml, *fnd;
1436 if (strcmp(arg->r_netid, udptrans) == 0) {
1439 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1442 } else if (arg->r_netid[0] == 0) {
1443 prot = 0; /* Remove all occurrences */
1445 /* Not an IP protocol */
1448 for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) {
1449 if ((pml->pml_map.pm_prog != arg->r_prog) ||
1450 (pml->pml_map.pm_vers != arg->r_vers) ||
1451 (prot && (pml->pml_map.pm_prot != prot))) {
1452 /* both pml & prevpml move forwards */
1454 pml = pml->pml_next;
1457 /* found it; pml moves forward, prevpml stays */
1459 pml = pml->pml_next;
1460 if (prevpml == NULL)
1463 prevpml->pml_next = pml;
1468 #endif /* PORTMAP */