1 /* $NetBSD: rpcb_svc_com.c,v 1.2 2011/09/16 16:13:18 plunky Exp $ */
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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21 * OR ANY PART THEREOF.
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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>
45 #include <sys/socket.h>
47 #include <rpc/rpcb_prot.h>
48 #include <netconfig.h>
55 #include <netinet/in.h>
56 #include <rpc/pmap_prot.h>
61 #include <rump/rump.h>
62 #include <rump/rump_syscalls.h>
66 #include "svc_fdset.h"
68 #define RPC_BUF_MAX 65536 /* can be raised if required */
70 static char emptystring[] = "";
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 u_int32_t forward_register(u_int32_t, struct netbuf *, int, char *,
105 rpcproc_t, rpcvers_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, 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 = (rpcblist_ptr) malloc((u_int)sizeof (RPCBLIST));
180 a = &(rbl->rpcb_map);
181 a->r_prog = reg.r_prog;
182 a->r_vers = reg.r_vers;
183 a->r_netid = strdup(reg.r_netid);
184 a->r_addr = strdup(reg.r_addr);
185 a->r_owner = strdup(owner);
186 if (!a->r_addr || !a->r_netid || !a->r_owner) {
188 free((void *) a->r_netid);
190 free((void *) a->r_addr);
192 free((void *) a->r_owner);
196 rbl->rpcb_next = NULL;
197 if (list_rbl == NULL) {
200 for (fnd = list_rbl; fnd->rpcb_next;
201 fnd = fnd->rpcb_next)
203 fnd->rpcb_next = rbl;
206 (void) add_pmaplist(regp);
212 * Unset a mapping of program, version, netid
216 rpcbproc_unset_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
217 rpcvers_t rpcbversnum)
219 RPCB *regp = (RPCB *)arg;
225 fprintf(stderr, "RPCB_UNSET request for (%lu, %lu, %s) : ",
226 (unsigned long)regp->r_prog, (unsigned long)regp->r_vers,
229 ans = map_unset(regp, getowner(transp, owner, sizeof owner));
232 fprintf(stderr, "%s\n", ans == TRUE ? "succeeded" : "failed");
234 /* XXX: should have used some defined constant here */
235 rpcbs_unset(rpcbversnum - 2, ans);
240 map_unset(RPCB *regp, const char *owner)
243 rpcblist_ptr rbl, prev, tmp;
248 for (prev = NULL, rbl = list_rbl; rbl; /* cstyle */) {
249 if ((rbl->rpcb_map.r_prog != regp->r_prog) ||
250 (rbl->rpcb_map.r_vers != regp->r_vers) ||
251 (regp->r_netid[0] && strcasecmp(regp->r_netid,
252 rbl->rpcb_map.r_netid))) {
253 /* both rbl & prev move forwards */
255 rbl = rbl->rpcb_next;
259 * Check whether appropriate uid. Unset only
260 * if superuser or the owner itself.
262 if (strcmp(owner, rpcbind_superuser) &&
263 strcmp(rbl->rpcb_map.r_owner, owner))
265 /* found it; rbl moves forward, prev stays */
268 rbl = rbl->rpcb_next;
272 prev->rpcb_next = rbl;
273 free((void *) tmp->rpcb_map.r_addr);
274 free((void *) tmp->rpcb_map.r_netid);
275 free((void *) tmp->rpcb_map.r_owner);
280 (void) del_pmaplist(regp);
283 * We return 1 either when the entry was not there or it
284 * was able to unset it. It can come to this point only if
285 * atleast one of the conditions is true.
291 delete_prog(int prog)
294 register rpcblist_ptr rbl;
296 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
297 if ((rbl->rpcb_map.r_prog != prog))
299 if (is_bound(rbl->rpcb_map.r_netid, rbl->rpcb_map.r_addr))
301 reg.r_prog = rbl->rpcb_map.r_prog;
302 reg.r_vers = rbl->rpcb_map.r_vers;
303 reg.r_netid = strdup(rbl->rpcb_map.r_netid);
304 (void)map_unset(®, rpcbind_superuser);
310 rpcbproc_getaddr_com(RPCB *regp, struct svc_req *rqstp, SVCXPRT *transp,
311 rpcvers_t rpcbversnum, rpcvers_t verstype)
317 if (uaddr && uaddr[0])
318 free((void *) uaddr);
319 fnd = find_service(regp->r_prog, regp->r_vers, transp->xp_netid);
320 if (fnd && ((verstype == RPCB_ALLVERS) ||
321 (regp->r_vers == fnd->rpcb_map.r_vers))) {
322 if (*(regp->r_addr) != '\0') { /* may contain a hint about */
323 saddr = regp->r_addr; /* the interface that we */
325 if (!(uaddr = mergeaddr(transp, transp->xp_netid,
326 fnd->rpcb_map.r_addr, saddr))) {
327 /* Try whatever we have */
328 uaddr = strdup(fnd->rpcb_map.r_addr);
329 } else if (!uaddr[0]) {
331 * The server died. Unset all versions of this prog.
333 delete_prog(regp->r_prog);
341 fprintf(stderr, "getaddr: %s\n", uaddr);
343 /* XXX: should have used some defined constant here */
344 rpcbs_getaddr(rpcbversnum - 2, regp->r_prog, regp->r_vers,
345 transp->xp_netid, uaddr);
346 return (void *)&uaddr;
351 rpcbproc_gettime_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
352 rpcvers_t rpcbversnum)
354 static time_t curtime;
356 (void) time(&curtime);
357 return (void *)&curtime;
361 * Convert uaddr to taddr. Should be used only by
362 * local servers/clients. (kernel level stuff only)
366 rpcbproc_uaddr2taddr_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
367 rpcvers_t rpcbversnum)
369 char **uaddrp = (char **)arg;
370 struct netconfig *nconf;
371 static struct netbuf nbuf;
372 static struct netbuf *taddr;
375 free((void *) taddr->buf);
376 free((void *) taddr);
378 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
379 ((taddr = uaddr2taddr(nconf, *uaddrp)) == NULL)) {
380 (void) memset((char *)&nbuf, 0, sizeof (struct netbuf));
381 return (void *)&nbuf;
383 return (void *)taddr;
387 * Convert taddr to uaddr. Should be used only by
388 * local servers/clients. (kernel level stuff only)
392 rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp, SVCXPRT *transp,
393 rpcvers_t rpcbversnum)
395 struct netbuf *taddr = (struct netbuf *)arg;
397 struct netconfig *nconf;
399 if (uaddr && !uaddr[0])
400 free((void *) uaddr);
401 if (((nconf = rpcbind_get_conf(transp->xp_netid)) == NULL) ||
402 ((uaddr = taddr2uaddr(nconf, taddr)) == NULL)) {
405 return (void *)&uaddr;
410 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
412 return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), ~0));
416 * XDR remote call arguments. It ignores the address part.
417 * written for XDR_DECODE direction only
420 xdr_rmtcall_args(XDR *xdrs, struct r_rmtcall_args *cap)
422 /* does not get the address or the arguments */
423 if (xdr_u_int32_t(xdrs, &(cap->rmt_prog)) &&
424 xdr_u_int32_t(xdrs, &(cap->rmt_vers)) &&
425 xdr_u_int32_t(xdrs, &(cap->rmt_proc))) {
426 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
432 * XDR remote call results along with the address. Ignore
433 * program number, version number and proc number.
434 * Written for XDR_ENCODE direction only.
437 xdr_rmtcall_result(XDR *xdrs, struct r_rmtcall_args *cap)
442 if (cap->rmt_localvers == PMAPVERS) {
443 int h1, h2, h3, h4, p1, p2;
446 /* interpret the universal address for TCP/IP */
447 if (sscanf(cap->rmt_uaddr, "%d.%d.%d.%d.%d.%d",
448 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
450 port = ((p1 & 0xff) << 8) + (p2 & 0xff);
451 result = xdr_u_long(xdrs, &port);
454 if ((cap->rmt_localvers == RPCBVERS) ||
455 (cap->rmt_localvers == RPCBVERS4)) {
456 result = xdr_wrapstring(xdrs, &(cap->rmt_uaddr));
461 return (xdr_encap_parms(xdrs, &(cap->rmt_args)));
466 * only worries about the struct encap_parms part of struct r_rmtcall_args.
467 * The arglen must already be set!!
470 xdr_opaque_parms(XDR *xdrs, struct r_rmtcall_args *cap)
472 return (xdr_opaque(xdrs, cap->rmt_args.args, cap->rmt_args.arglen));
475 static struct rmtcallfd_list *rmthead;
476 static struct rmtcallfd_list *rmttail;
479 create_rmtcall_fd(struct netconfig *nconf)
482 struct rmtcallfd_list *rmt;
485 if ((fd = __rpc_nconf2fd(nconf)) == -1) {
488 "create_rmtcall_fd: couldn't open \"%s\" (errno %d)\n",
489 nconf->nc_device, errno);
492 xprt = svc_tli_create(fd, 0, (struct t_bind *) 0, 0, 0);
496 "create_rmtcall_fd: svc_tli_create failed\n");
499 rmt = (struct rmtcallfd_list *)malloc((u_int)
500 sizeof (struct rmtcallfd_list));
502 syslog(LOG_ERR, "create_rmtcall_fd: no memory!");
506 rmt->netid = strdup(nconf->nc_netid);
507 xprt->xp_netid = rmt->netid;
510 if (rmthead == NULL) {
517 /* XXX not threadsafe */
518 if (fd > *get_fdsetmax())
519 *get_fdsetmax() = fd;
520 FD_SET(fd, get_fdset());
525 find_rmtcallfd_by_netid(char *netid)
527 struct rmtcallfd_list *rmt;
529 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
530 if (strcmp(netid, rmt->netid) == 0) {
538 find_rmtcallxprt_by_fd(int fd)
540 struct rmtcallfd_list *rmt;
542 for (rmt = rmthead; rmt != NULL; rmt = rmt->next) {
552 * Call a remote procedure service. This procedure is very quiet when things
553 * go wrong. The proc is written to support broadcast rpc. In the broadcast
554 * case, a machine should shut-up instead of complain, lest the requestor be
555 * overrun with complaints at the expense of not hearing a valid reply.
556 * When receiving a request and verifying that the service exists, we
558 * receive the request
560 * open a new TLI endpoint on the same transport on which we received
561 * the original request
563 * remember the original request's XID (which requires knowing the format
564 * of the svc_dg_data structure)
566 * forward the request, with a new XID, to the requested service,
567 * remembering the XID used to send this request (for later use in
568 * reassociating the answer with the original request), the requestor's
569 * address, the file descriptor on which the forwarded request is
570 * made and the service's address.
572 * mark the file descriptor on which we anticipate receiving a reply from
573 * the service and one to select for in our private svc_run procedure
575 * At some time in the future, a reply will be received from the service to
576 * which we forwarded the request. At that time, we detect that the socket
577 * used was for forwarding (by looking through the finfo structures to see
578 * whether the fd corresponds to one of those) and call handle_reply() to
582 * bundle the reply, along with the service's universal address
584 * create a SVCXPRT structure and use a version of svc_sendreply
585 * that allows us to specify the reply XID and destination, send the reply
586 * to the original requestor.
590 rpcbproc_callit_com(struct svc_req *rqstp, SVCXPRT *transp,
591 rpcproc_t reply_type, rpcvers_t versnum)
593 register rpcblist_ptr rbl;
594 struct netconfig *nconf;
595 struct netbuf *caller;
596 struct r_rmtcall_args a;
597 char *buf_alloc = NULL, *outbufp;
598 char *outbuf_alloc = NULL;
599 char buf[RPC_BUF_MAX], outbuf[RPC_BUF_MAX];
600 struct netbuf *na = NULL;
601 struct rpc_msg call_msg;
607 char *uaddr, *m_uaddr, *local_uaddr = NULL;
609 struct __rpc_sockinfo si;
610 struct sockaddr *localsa;
613 if (!__rpc_fd2sockinfo(transp->xp_fd, &si)) {
614 if (reply_type == RPCBPROC_INDIRECT)
615 svcerr_systemerr(transp);
618 if (si.si_socktype != SOCK_DGRAM)
619 return; /* Only datagram type accepted */
620 sendsz = __rpc_get_t_size(si.si_af, si.si_proto, UDPMSGSIZE);
621 if (sendsz == 0) { /* data transfer not supported */
622 if (reply_type == RPCBPROC_INDIRECT)
623 svcerr_systemerr(transp);
627 * Should be multiple of 4 for XDR.
629 sendsz = ((sendsz + 3) / 4) * 4;
630 if (sendsz > RPC_BUF_MAX) {
632 buf_alloc = alloca(sendsz); /* not in IDR2? */
634 buf_alloc = malloc(sendsz);
636 if (buf_alloc == NULL) {
639 "rpcbproc_callit_com: No Memory!\n");
640 if (reply_type == RPCBPROC_INDIRECT)
641 svcerr_systemerr(transp);
644 a.rmt_args.args = buf_alloc;
646 a.rmt_args.args = buf;
649 call_msg.rm_xid = 0; /* For error checking purposes */
650 if (!svc_getargs(transp, (xdrproc_t) xdr_rmtcall_args, (char *) &a)) {
651 if (reply_type == RPCBPROC_INDIRECT)
652 svcerr_decode(transp);
655 "rpcbproc_callit_com: svc_getargs failed\n");
659 if (!check_callit(transp, &a, versnum)) {
660 svcerr_weakauth(transp);
664 caller = svc_getrpccaller(transp);
667 uaddr = taddr2uaddr(rpcbind_get_conf(transp->xp_netid), caller);
668 fprintf(stderr, "%s %s req for (%lu, %lu, %lu, %s) from %s : ",
669 versnum == PMAPVERS ? "pmap_rmtcall" :
670 versnum == RPCBVERS ? "rpcb_rmtcall" :
671 versnum == RPCBVERS4 ? "rpcb_indirect" :
673 reply_type == RPCBPROC_INDIRECT ? "indirect" : "callit",
674 (unsigned long)a.rmt_prog, (unsigned long)a.rmt_vers,
675 (unsigned long)a.rmt_proc, transp->xp_netid,
676 uaddr ? uaddr : rpcbind_unknown);
678 free((void *) uaddr);
682 rbl = find_service(a.rmt_prog, a.rmt_vers, transp->xp_netid);
684 rpcbs_rmtcall(versnum - 2, reply_type, a.rmt_prog, a.rmt_vers,
685 a.rmt_proc, transp->xp_netid, rbl);
690 fprintf(stderr, "not found\n");
692 if (reply_type == RPCBPROC_INDIRECT)
693 svcerr_noprog(transp);
696 if (rbl->rpcb_map.r_vers != a.rmt_vers) {
697 if (reply_type == RPCBPROC_INDIRECT) {
698 rpcvers_t vers_low, vers_high;
700 find_versions(a.rmt_prog, transp->xp_netid,
701 &vers_low, &vers_high);
702 svcerr_progvers(transp, vers_low, vers_high);
709 fprintf(stderr, "found at uaddr %s\n", rbl->rpcb_map.r_addr);
712 * Check whether this entry is valid and a server is present
713 * Mergeaddr() returns NULL if no such entry is present, and
714 * returns "" if the entry was present but the server is not
715 * present (i.e., it crashed).
717 if (reply_type == RPCBPROC_INDIRECT) {
718 uaddr = mergeaddr(transp, transp->xp_netid,
719 rbl->rpcb_map.r_addr, NULL);
720 if (uaddr == NULL || uaddr[0] == '\0') {
721 svcerr_noprog(transp);
723 free((void *) uaddr);
728 free((void *) uaddr);
731 nconf = rpcbind_get_conf(transp->xp_netid);
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);
760 free((void *) m_uaddr);
763 xidp = __rpcb_get_dg_xidp(transp);
764 call_msg.rm_xid = forward_register(*xidp,
765 caller, fd, m_uaddr, reply_type, versnum);
766 if (call_msg.rm_xid == 0) {
768 * A duplicate request for the slow server. Let's not
769 * beat on it any more.
773 "rpcbproc_callit_com: duplicate request\n");
774 free((void *) m_uaddr);
776 } else if (call_msg.rm_xid == -1) {
777 /* forward_register failed. Perhaps no memory. */
780 "rpcbproc_callit_com: forward_register failed\n");
781 free((void *) m_uaddr);
788 "rpcbproc_callit_com: original XID %x, new XID %x\n",
789 *xidp, call_msg.rm_xid);
791 call_msg.rm_direction = CALL;
792 call_msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
793 call_msg.rm_call.cb_prog = a.rmt_prog;
794 call_msg.rm_call.cb_vers = a.rmt_vers;
795 if (sendsz > RPC_BUF_MAX) {
797 outbuf_alloc = alloca(sendsz); /* not in IDR2? */
799 outbuf_alloc = malloc(sendsz);
801 if (outbuf_alloc == NULL) {
802 if (reply_type == RPCBPROC_INDIRECT)
803 svcerr_systemerr(transp);
806 "rpcbproc_callit_com: No memory!\n");
809 xdrmem_create(&outxdr, outbuf_alloc, sendsz, XDR_ENCODE);
811 xdrmem_create(&outxdr, outbuf, sendsz, XDR_ENCODE);
813 if (!xdr_callhdr(&outxdr, &call_msg)) {
814 if (reply_type == RPCBPROC_INDIRECT)
815 svcerr_systemerr(transp);
818 "rpcbproc_callit_com: xdr_callhdr failed\n");
821 if (!xdr_u_int32_t(&outxdr, &(a.rmt_proc))) {
822 if (reply_type == RPCBPROC_INDIRECT)
823 svcerr_systemerr(transp);
826 "rpcbproc_callit_com: xdr_u_long failed\n");
830 if (rqstp->rq_cred.oa_flavor == AUTH_NULL) {
831 auth = authnone_create();
832 } else if (rqstp->rq_cred.oa_flavor == AUTH_SYS) {
833 struct authunix_parms *au;
835 au = (struct authunix_parms *)rqstp->rq_clntcred;
836 auth = authunix_create(au->aup_machname,
837 au->aup_uid, au->aup_gid,
838 au->aup_len, au->aup_gids);
839 if (auth == NULL) /* fall back */
840 auth = authnone_create();
842 /* we do not support any other authentication scheme */
845 "rpcbproc_callit_com: oa_flavor != AUTH_NONE and oa_flavor != AUTH_SYS\n");
846 if (reply_type == RPCBPROC_INDIRECT)
847 svcerr_weakauth(transp); /* XXX too strong.. */
851 if (reply_type == RPCBPROC_INDIRECT)
852 svcerr_systemerr(transp);
855 "rpcbproc_callit_com: authwhatever_create returned NULL\n");
858 if (!AUTH_MARSHALL(auth, &outxdr)) {
859 if (reply_type == RPCBPROC_INDIRECT)
860 svcerr_systemerr(transp);
864 "rpcbproc_callit_com: AUTH_MARSHALL failed\n");
868 if (!xdr_opaque_parms(&outxdr, &a)) {
869 if (reply_type == RPCBPROC_INDIRECT)
870 svcerr_systemerr(transp);
873 "rpcbproc_callit_com: xdr_opaque_parms failed\n");
876 outlen = (int) XDR_GETPOS(&outxdr);
878 outbufp = outbuf_alloc;
882 na = uaddr2taddr(nconf, local_uaddr);
884 if (reply_type == RPCBPROC_INDIRECT)
885 svcerr_systemerr(transp);
889 if (sendto(fd, outbufp, outlen, 0, (struct sockaddr *)na->buf, na->len)
893 "rpcbproc_callit_com: sendto failed: errno %d\n", errno);
894 if (reply_type == RPCBPROC_INDIRECT)
895 svcerr_systemerr(transp);
901 if (call_msg.rm_xid != 0)
902 (void) free_slot_by_xid(call_msg.rm_xid);
907 free((void *) buf_alloc);
909 free((void *) outbuf_alloc);
917 * Makes an entry into the FIFO for the given request.
918 * If duplicate request, returns a 0, else returns the xid of its call.
921 forward_register(u_int32_t caller_xid, struct netbuf *caller_addr,
922 int forward_fd, char *uaddr, rpcproc_t reply_type,
927 time_t min_time, time_now;
928 static u_int32_t lastxid;
931 min_time = FINFO[0].time;
932 time_now = time((time_t *)0);
935 lastxid = time_now * NFORWARD;
938 * Check if it is an duplicate entry. Then,
939 * try to find an empty slot. If not available, then
940 * use the slot with the earliest time.
942 for (i = 0; i < NFORWARD; i++) {
943 if (FINFO[i].flag & FINFO_ACTIVE) {
944 if ((FINFO[i].caller_xid == caller_xid) &&
945 (FINFO[i].reply_type == reply_type) &&
946 (FINFO[i].versnum == versnum) &&
947 (!netbufcmp(FINFO[i].caller_addr,
949 FINFO[i].time = time((time_t *)0);
950 return (0); /* Duplicate entry */
952 /* Should we wait any longer */
953 if ((time_now - FINFO[i].time) > MAXTIME_OFF)
954 (void) free_slot_by_index(i);
958 if ((FINFO[i].flag & FINFO_ACTIVE) == 0) {
960 } else if (FINFO[i].time < min_time) {
962 min_time = FINFO[i].time;
967 /* use this empty slot */
970 (void) free_slot_by_index(j);
972 if ((FINFO[j].caller_addr = netbufdup(caller_addr)) == NULL) {
975 rpcb_rmtcalls++; /* no of pending calls */
976 FINFO[j].flag = FINFO_ACTIVE;
977 FINFO[j].reply_type = reply_type;
978 FINFO[j].versnum = versnum;
979 FINFO[j].time = time_now;
980 FINFO[j].caller_xid = caller_xid;
981 FINFO[j].forward_fd = forward_fd;
983 * Though uaddr is not allocated here, it will still be freed
984 * from free_slot_*().
986 FINFO[j].uaddr = uaddr;
987 lastxid = lastxid + NFORWARD;
988 FINFO[j].forward_xid = lastxid + j; /* encode slot */
989 return (FINFO[j].forward_xid); /* forward on this xid */
992 static struct finfo *
993 forward_find(u_int32_t reply_xid)
997 i = reply_xid % NFORWARD;
1000 if ((FINFO[i].flag & FINFO_ACTIVE) &&
1001 (FINFO[i].forward_xid == reply_xid)) {
1008 free_slot_by_xid(u_int32_t xid)
1012 entry = xid % NFORWARD;
1015 return (free_slot_by_index(entry));
1019 free_slot_by_index(int idx)
1024 if (fi->flag & FINFO_ACTIVE) {
1025 netbuffree(fi->caller_addr);
1026 /* XXX may be too big, but can't access xprt array here */
1027 if (fi->forward_fd >= *get_fdsetmax())
1028 (*get_fdsetmax())--;
1029 free((void *) fi->uaddr);
1030 fi->flag &= ~FINFO_ACTIVE;
1038 netbufcmp(struct netbuf *n1, struct netbuf *n2)
1040 return ((n1->len != n2->len) || memcmp(n1->buf, n2->buf, n1->len));
1043 static struct netbuf *
1044 netbufdup(struct netbuf *ap)
1048 np = (struct netbuf *) malloc(sizeof (struct netbuf) + ap->len);
1050 np->maxlen = np->len = ap->len;
1051 np->buf = ((char *) np) + sizeof (struct netbuf);
1052 (void) memcpy(np->buf, ap->buf, ap->len);
1058 netbuffree(struct netbuf *ap)
1064 #define MASKVAL (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)
1065 extern bool_t __svc_clean_idle(fd_set *, int, bool_t);
1071 struct pollfd pollfds[FD_SETSIZE];
1072 int poll_ret, check_ret;
1074 #ifdef SVC_RUN_DEBUG
1077 register struct pollfd *p;
1082 for (n = 0; n <= *get_fdsetmax(); n++) {
1083 if (FD_ISSET(n, get_fdset())) {
1085 p->events = MASKVAL;
1091 #ifdef SVC_RUN_DEBUG
1093 fprintf(stderr, "polling for read on fd < ");
1094 for (i = 0, p = pollfds; i < nfds; i++, p++)
1096 fprintf(stderr, "%d ", p->fd);
1097 fprintf(stderr, ">\n");
1100 poll_ret = rump_sys_poll(pollfds, nfds, 30 * 1000);
1101 //printf("rpcbind poll got %d\n", poll_ret);
1105 * We ignore all errors, continuing with the assumption
1106 * that it was set by the signal handlers (or any
1107 * other outside event) and not caused by poll().
1110 cleanfds = *get_fdset();
1111 __svc_clean_idle(&cleanfds, 30, FALSE);
1114 #ifdef SVC_RUN_DEBUG
1116 fprintf(stderr, "poll returned read fds < ");
1117 for (i = 0, p = pollfds; i < nfds; i++, p++)
1119 fprintf(stderr, "%d (0x%x) ", p->fd, p->revents);
1120 fprintf(stderr, ">\n");
1124 * If we found as many replies on callback fds
1125 * as the number of descriptors selectable which
1126 * poll() returned, there can be no more so we
1127 * don't call svc_getreq_poll. Otherwise, there
1128 * must be another so we must call svc_getreq_poll.
1130 if ((check_ret = check_rmtcalls(pollfds, nfds)) ==
1133 svc_getreq_poll(pollfds, poll_ret-check_ret);
1135 #ifdef SVC_RUN_DEBUG
1137 fprintf(stderr, "svc_maxfd now %u\n", *get_fdsetmax());
1144 check_rmtcalls(struct pollfd *pfds, int nfds)
1146 int j, ncallbacks_found = 0, rmtcalls_pending;
1149 if (rpcb_rmtcalls == 0)
1152 rmtcalls_pending = rpcb_rmtcalls;
1153 for (j = 0; j < nfds; j++) {
1154 if ((xprt = find_rmtcallxprt_by_fd(pfds[j].fd)) != NULL) {
1155 if (pfds[j].revents) {
1157 #ifdef DEBUG_RMTCALL
1160 "my_svc_run: polled on forwarding fd %d, netid %s - calling handle_reply\n",
1161 pfds[j].fd, xprt->xp_netid);
1163 handle_reply(pfds[j].fd, xprt);
1164 pfds[j].revents = 0;
1165 if (ncallbacks_found >= rmtcalls_pending) {
1171 return (ncallbacks_found);
1175 xprt_set_caller(SVCXPRT *xprt, struct finfo *fi)
1179 *(svc_getrpccaller(xprt)) = *(fi->caller_addr);
1180 xidp = __rpcb_get_dg_xidp(xprt);
1181 *xidp = fi->caller_xid;
1185 * Call svcerr_systemerr() only if RPCBVERS4
1188 send_svcsyserr(SVCXPRT *xprt, struct finfo *fi)
1190 if (fi->reply_type == RPCBPROC_INDIRECT) {
1191 xprt_set_caller(xprt, fi);
1192 svcerr_systemerr(xprt);
1198 handle_reply(int fd, SVCXPRT *xprt)
1201 struct rpc_msg reply_msg;
1202 struct rpc_err reply_error;
1205 int inlen, pos, len;
1206 struct r_rmtcall_args a;
1207 struct sockaddr_storage ss;
1209 #ifdef SVC_RUN_DEBUG
1213 buffer = malloc(RPC_BUF_MAX);
1218 fromlen = sizeof ss;
1219 inlen = recvfrom(fd, buffer, RPC_BUF_MAX, 0,
1220 (struct sockaddr *)&ss, &fromlen);
1221 } while (inlen < 0 && errno == EINTR);
1225 "handle_reply: recvfrom returned %d, errno %d\n", inlen, errno);
1229 reply_msg.acpted_rply.ar_verf = _null_auth;
1230 reply_msg.acpted_rply.ar_results.where = 0;
1231 reply_msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_void;
1233 xdrmem_create(&reply_xdrs, buffer, (u_int)inlen, XDR_DECODE);
1234 if (!xdr_replymsg(&reply_xdrs, &reply_msg)) {
1236 (void) fprintf(stderr,
1237 "handle_reply: xdr_replymsg failed\n");
1240 fi = forward_find(reply_msg.rm_xid);
1241 #ifdef SVC_RUN_DEBUG
1243 fprintf(stderr, "handle_reply: reply xid: %d fi addr: %p\n",
1244 reply_msg.rm_xid, fi);
1250 _seterr_reply(&reply_msg, &reply_error);
1251 if (reply_error.re_status != RPC_SUCCESS) {
1253 (void) fprintf(stderr, "handle_reply: %s\n",
1254 clnt_sperrno(reply_error.re_status));
1255 send_svcsyserr(xprt, fi);
1258 pos = XDR_GETPOS(&reply_xdrs);
1260 a.rmt_args.args = &buffer[pos];
1261 a.rmt_args.arglen = len;
1262 a.rmt_uaddr = fi->uaddr;
1263 a.rmt_localvers = fi->versnum;
1265 xprt_set_caller(xprt, fi);
1266 #ifdef SVC_RUN_DEBUG
1267 uaddr = taddr2uaddr(rpcbind_get_conf("udp"),
1268 svc_getrpccaller(xprt));
1270 fprintf(stderr, "handle_reply: forwarding address %s to %s\n",
1271 a.rmt_uaddr, uaddr ? uaddr : rpcbind_unknown);
1274 free((void *) uaddr);
1276 svc_sendreply(xprt, (xdrproc_t) xdr_rmtcall_result, (char *) &a);
1281 if (reply_msg.rm_xid == 0) {
1282 #ifdef SVC_RUN_DEBUG
1284 fprintf(stderr, "handle_reply: NULL xid on exit!\n");
1288 (void) free_slot_by_xid(reply_msg.rm_xid);
1293 find_versions(rpcprog_t prog, char *netid, rpcvers_t *lowvp, rpcvers_t *highvp)
1295 register rpcblist_ptr rbl;
1299 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1300 if ((rbl->rpcb_map.r_prog != prog) ||
1301 ((rbl->rpcb_map.r_netid != NULL) &&
1302 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1305 highv = rbl->rpcb_map.r_vers;
1307 } else if (rbl->rpcb_map.r_vers < lowv) {
1308 lowv = rbl->rpcb_map.r_vers;
1309 } else if (rbl->rpcb_map.r_vers > highv) {
1310 highv = rbl->rpcb_map.r_vers;
1319 * returns the item with the given program, version number and netid.
1320 * If that version number is not found, it returns the item with that
1321 * program number, so that address is now returned to the caller. The
1322 * caller when makes a call to this program, version number, the call
1323 * will fail and it will return with PROGVERS_MISMATCH. The user can
1324 * then determine the highest and the lowest version number for this
1325 * program using clnt_geterr() and use those program version numbers.
1327 * Returns the RPCBLIST for the given prog, vers and netid
1330 find_service(rpcprog_t prog, rpcvers_t vers, char *netid)
1332 register rpcblist_ptr hit = NULL;
1333 register rpcblist_ptr rbl;
1335 for (rbl = list_rbl; rbl != NULL; rbl = rbl->rpcb_next) {
1336 if ((rbl->rpcb_map.r_prog != prog) ||
1337 ((rbl->rpcb_map.r_netid != NULL) &&
1338 (strcasecmp(rbl->rpcb_map.r_netid, netid) != 0)))
1341 if (rbl->rpcb_map.r_vers == vers)
1348 * Copies the name associated with the uid of the caller and returns
1349 * a pointer to it. Similar to getwd().
1352 getowner(SVCXPRT *transp, char *owner, size_t ownersize)
1354 struct sockcred *sc;
1356 sc = __svc_getcallercreds(transp);
1358 strlcpy(owner, rpcbind_unknown, ownersize);
1359 else if (sc->sc_uid == 0)
1360 strlcpy(owner, rpcbind_superuser, ownersize);
1362 snprintf(owner, ownersize, "%d", sc->sc_uid);
1369 * Add this to the pmap list only if it is UDP or TCP.
1372 add_pmaplist(RPCB *arg)
1375 struct pmaplist *pml;
1376 int h1, h2, h3, h4, p1, p2;
1378 if (strcmp(arg->r_netid, udptrans) == 0) {
1380 pmap.pm_prot = IPPROTO_UDP;
1381 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1383 pmap.pm_prot = IPPROTO_TCP;
1385 /* Not a IP protocol */
1388 /* interpret the universal address for TCP/IP */
1389 if (sscanf(arg->r_addr, "%d.%d.%d.%d.%d.%d",
1390 &h1, &h2, &h3, &h4, &p1, &p2) != 6)
1392 pmap.pm_port = ((p1 & 0xff) << 8) + (p2 & 0xff);
1393 pmap.pm_prog = arg->r_prog;
1394 pmap.pm_vers = arg->r_vers;
1396 * add to END of list
1398 pml = (struct pmaplist *) malloc((u_int)sizeof (struct pmaplist));
1400 (void) syslog(LOG_ERR, "rpcbind: no memory!\n");
1403 pml->pml_map = pmap;
1404 pml->pml_next = NULL;
1405 if (list_pml == NULL) {
1408 struct pmaplist *fnd;
1410 /* Attach to the end of the list */
1411 for (fnd = list_pml; fnd->pml_next; fnd = fnd->pml_next)
1413 fnd->pml_next = pml;
1419 * Delete this from the pmap list only if it is UDP or TCP.
1422 del_pmaplist(RPCB *arg)
1424 struct pmaplist *pml;
1425 struct pmaplist *prevpml, *fnd;
1428 if (strcmp(arg->r_netid, udptrans) == 0) {
1431 } else if (strcmp(arg->r_netid, tcptrans) == 0) {
1434 } else if (arg->r_netid[0] == 0) {
1435 prot = 0; /* Remove all occurrences */
1437 /* Not a IP protocol */
1440 for (prevpml = NULL, pml = list_pml; pml; /* cstyle */) {
1441 if ((pml->pml_map.pm_prog != arg->r_prog) ||
1442 (pml->pml_map.pm_vers != arg->r_vers) ||
1443 (prot && (pml->pml_map.pm_prot != prot))) {
1444 /* both pml & prevpml move forwards */
1446 pml = pml->pml_next;
1449 /* found it; pml moves forward, prevpml stays */
1451 pml = pml->pml_next;
1452 if (prevpml == NULL)
1455 prevpml->pml_next = pml;
1460 #endif /* PORTMAP */