1 /* $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $ */
4 * Copyright (c) 2009, Sun Microsystems, Inc.
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8 * modification, are permitted provided that the following conditions are met:
9 * - Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
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12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
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15 * contributors may be used to endorse or promote products derived
16 * from this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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31 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 /* #pragma ident "@(#)rpc_generic.c 1.17 94/04/24 SMI" */
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
39 * rpc_generic.c, Miscl routines for RPC.
43 #include "namespace.h"
44 #include "reentrant.h"
45 #include <sys/types.h>
46 #include <sys/param.h>
47 #include <sys/socket.h>
50 #include <sys/resource.h>
51 #include <netinet/in.h>
52 #include <arpa/inet.h>
58 #include <netconfig.h>
62 #include <rpc/nettype.h>
63 #include "un-namespace.h"
68 NCONF_HANDLE *nhandle;
69 int nflag; /* Whether NETPATH or NETCONFIG */
73 static const struct _rpcnettype {
77 { "netpath", _RPC_NETPATH },
78 { "visible", _RPC_VISIBLE },
79 { "circuit_v", _RPC_CIRCUIT_V },
80 { "datagram_v", _RPC_DATAGRAM_V },
81 { "circuit_n", _RPC_CIRCUIT_N },
82 { "datagram_n", _RPC_DATAGRAM_N },
94 static const struct netid_af na_cvt[] = {
95 { "udp", AF_INET, IPPROTO_UDP },
96 { "tcp", AF_INET, IPPROTO_TCP },
98 { "udp6", AF_INET6, IPPROTO_UDP },
99 { "tcp6", AF_INET6, IPPROTO_TCP },
101 { "local", AF_LOCAL, 0 }
105 static char *strlocase(char *);
107 static int getnettype(const char *);
110 * Cache the result of getrlimit(), so we don't have to do an
111 * expensive call every time.
122 if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
123 return (tbsize = (int)rl.rlim_max);
126 * Something wrong. I'll try to save face by returning a
127 * pessimistic number.
134 * Find the appropriate buffer size
138 __rpc_get_t_size(af, proto, size)
140 int size; /* Size requested */
142 int maxsize, defsize;
144 maxsize = 256 * 1024; /* XXX */
147 defsize = 64 * 1024; /* XXX */
150 defsize = UDPMSGSIZE;
153 defsize = RPC_MAXDATASIZE;
159 /* Check whether the value is within the upper max limit */
160 return (size > maxsize ? (u_int)maxsize : (u_int)size);
164 * Find the appropriate address buffer size
172 return sizeof (struct sockaddr_in);
175 return sizeof (struct sockaddr_in6);
178 return sizeof (struct sockaddr_un);
182 return ((u_int)RPC_MAXADDRSIZE);
200 * Returns the type of the network as defined in <rpc/nettype.h>
201 * If nettype is NULL, it defaults to NETPATH.
209 if ((nettype == NULL) || (nettype[0] == 0)) {
210 return (_RPC_NETPATH); /* Default */
214 nettype = strlocase(nettype);
216 for (i = 0; _rpctypelist[i].name; i++)
217 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
218 return (_rpctypelist[i].type);
220 return (_rpctypelist[i].type);
223 static thread_key_t tcp_key, udp_key;
224 static once_t keys_once = ONCE_INITIALIZER;
225 static int tcp_key_error, udp_key_error;
231 tcp_key_error = thr_keycreate(&tcp_key, free);
232 udp_key_error = thr_keycreate(&udp_key, free);
236 * For the given nettype (tcp or udp only), return the first structure found.
237 * This should be freed by calling freenetconfigent()
240 __rpc_getconfip(nettype)
244 char *netid_tcp = (char *) NULL;
245 char *netid_udp = (char *) NULL;
246 static char *netid_tcp_main;
247 static char *netid_udp_main;
248 struct netconfig *dummy;
251 if ((main_thread = thr_main())) {
252 netid_udp = netid_udp_main;
253 netid_tcp = netid_tcp_main;
255 if (thr_once(&keys_once, keys_init) != 0 ||
256 tcp_key_error != 0 || udp_key_error != 0)
258 netid_tcp = (char *)thr_getspecific(tcp_key);
259 netid_udp = (char *)thr_getspecific(udp_key);
261 if (!netid_udp && !netid_tcp) {
262 struct netconfig *nconf;
265 if (!(confighandle = setnetconfig())) {
266 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
269 while ((nconf = getnetconfig(confighandle)) != NULL) {
270 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
271 if (strcmp(nconf->nc_proto, NC_TCP) == 0 &&
273 netid_tcp = strdup(nconf->nc_netid);
275 netid_tcp_main = netid_tcp;
277 thr_setspecific(tcp_key,
280 if (strcmp(nconf->nc_proto, NC_UDP) == 0 &&
282 netid_udp = strdup(nconf->nc_netid);
284 netid_udp_main = netid_udp;
286 thr_setspecific(udp_key,
291 endnetconfig(confighandle);
293 if (strcmp(nettype, "udp") == 0)
295 else if (strcmp(nettype, "tcp") == 0)
300 if ((netid == NULL) || (netid[0] == 0)) {
303 dummy = getnetconfigent(netid);
308 * Returns the type of the nettype, which should then be used with
312 __rpc_setconf(nettype)
315 struct handle *handle;
317 handle = (struct handle *) malloc(sizeof (struct handle));
318 if (handle == NULL) {
321 switch (handle->nettype = getnettype(nettype)) {
324 case _RPC_DATAGRAM_N:
325 if (!(handle->nhandle = setnetpath()))
327 handle->nflag = TRUE;
331 case _RPC_DATAGRAM_V:
334 if (!(handle->nhandle = setnetconfig())) {
335 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
338 handle->nflag = FALSE;
352 * Returns the next netconfig struct for the given "net" type.
353 * __rpc_setconf() should have been called previously.
356 __rpc_getconf(vhandle)
359 struct handle *handle;
360 struct netconfig *nconf;
362 handle = (struct handle *)vhandle;
363 if (handle == NULL) {
368 nconf = getnetpath(handle->nhandle);
370 nconf = getnetconfig(handle->nhandle);
373 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
374 (nconf->nc_semantics != NC_TPI_COTS) &&
375 (nconf->nc_semantics != NC_TPI_COTS_ORD))
377 switch (handle->nettype) {
379 if (!(nconf->nc_flag & NC_VISIBLE))
382 case _RPC_NETPATH: /* Be happy */
385 if (!(nconf->nc_flag & NC_VISIBLE))
389 if ((nconf->nc_semantics != NC_TPI_COTS) &&
390 (nconf->nc_semantics != NC_TPI_COTS_ORD))
393 case _RPC_DATAGRAM_V:
394 if (!(nconf->nc_flag & NC_VISIBLE))
397 case _RPC_DATAGRAM_N:
398 if (nconf->nc_semantics != NC_TPI_CLTS)
402 if (((nconf->nc_semantics != NC_TPI_COTS) &&
403 (nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
404 (strcmp(nconf->nc_protofmly, NC_INET)
406 && strcmp(nconf->nc_protofmly, NC_INET6))
411 strcmp(nconf->nc_proto, NC_TCP))
415 if ((nconf->nc_semantics != NC_TPI_CLTS) ||
416 (strcmp(nconf->nc_protofmly, NC_INET)
418 && strcmp(nconf->nc_protofmly, NC_INET6))
423 strcmp(nconf->nc_proto, NC_UDP))
433 __rpc_endconf(vhandle)
436 struct handle *handle;
438 handle = (struct handle *) vhandle;
439 if (handle == NULL) {
443 endnetpath(handle->nhandle);
445 endnetconfig(handle->nhandle);
451 * Used to ping the NULL procedure for clnt handle.
452 * Returns NULL if fails, else a non-NULL pointer.
458 struct timeval TIMEOUT = {25, 0};
460 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
461 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
464 return ((void *) clnt);
468 * Try all possible transports until
469 * one succeeds in finding the netconf for the given fd.
476 struct __rpc_sockinfo si;
478 if (!__rpc_fd2sockinfo(fd, &si))
481 if (!__rpc_sockinfo2netid(&si, &netid))
484 /*LINTED const castaway*/
485 return getnetconfigent((char *)netid);
489 __rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
493 struct sockaddr_storage ss;
496 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
501 if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
505 if (ss.ss_family != AF_LOCAL) {
506 if (type == SOCK_STREAM)
508 else if (type == SOCK_DGRAM)
515 sip->si_af = ss.ss_family;
516 sip->si_proto = proto;
517 sip->si_socktype = type;
523 * Linear search, but the number of entries is small.
526 __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
530 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
531 if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
532 strcmp(nconf->nc_netid, "unix") == 0 &&
533 strcmp(na_cvt[i].netid, "local") == 0)) {
534 sip->si_af = na_cvt[i].af;
535 sip->si_proto = na_cvt[i].protocol;
537 __rpc_seman2socktype((int)nconf->nc_semantics);
538 if (sip->si_socktype == -1)
540 sip->si_alen = __rpc_get_a_size(sip->si_af);
548 __rpc_nconf2fd(const struct netconfig *nconf)
550 struct __rpc_sockinfo si;
552 if (!__rpc_nconf2sockinfo(nconf, &si))
555 return _socket(si.si_af, si.si_socktype, si.si_proto);
559 __rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
562 struct netconfig *nconf;
564 nconf = getnetconfigent("local");
566 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) {
567 if (na_cvt[i].af == sip->si_af &&
568 na_cvt[i].protocol == sip->si_proto) {
569 if (strcmp(na_cvt[i].netid, "local") == 0 && nconf == NULL) {
574 *netid = na_cvt[i].netid;
577 freenetconfigent(nconf);
582 freenetconfigent(nconf);
588 taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
590 struct __rpc_sockinfo si;
592 if (!__rpc_nconf2sockinfo(nconf, &si))
594 return __rpc_taddr2uaddr_af(si.si_af, nbuf);
598 uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
600 struct __rpc_sockinfo si;
602 if (!__rpc_nconf2sockinfo(nconf, &si))
604 return __rpc_uaddr2taddr_af(si.si_af, uaddr);
608 __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
611 struct sockaddr_in *sin;
612 struct sockaddr_un *sun;
613 char namebuf[INET_ADDRSTRLEN];
615 struct sockaddr_in6 *sin6;
616 char namebuf6[INET6_ADDRSTRLEN];
623 if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
626 port = ntohs(sin->sin_port);
627 if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
634 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
637 port = ntohs(sin6->sin6_port);
638 if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
645 if (asprintf(&ret, "%.*s", (int)(sun->sun_len -
646 offsetof(struct sockaddr_un, sun_path)),
658 __rpc_uaddr2taddr_af(int af, const char *uaddr)
660 struct netbuf *ret = NULL;
662 unsigned port, portlo, porthi;
663 struct sockaddr_in *sin;
665 struct sockaddr_in6 *sin6;
667 struct sockaddr_un *sun;
671 addrstr = strdup(uaddr);
676 * AF_LOCAL addresses are expected to be absolute
677 * pathnames, anything else will be AF_INET or AF_INET6.
679 if (*addrstr != '/') {
680 p = strrchr(addrstr, '.');
683 portlo = (unsigned)atoi(p + 1);
686 p = strrchr(addrstr, '.');
689 porthi = (unsigned)atoi(p + 1);
691 port = (porthi << 8) | portlo;
694 ret = (struct netbuf *)malloc(sizeof *ret);
700 sin = (struct sockaddr_in *)malloc(sizeof *sin);
703 memset(sin, 0, sizeof *sin);
704 sin->sin_family = AF_INET;
705 sin->sin_port = htons(port);
706 if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
712 sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
717 sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6);
720 memset(sin6, 0, sizeof *sin6);
721 sin6->sin6_family = AF_INET6;
722 sin6->sin6_port = htons(port);
723 if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
729 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
734 sun = (struct sockaddr_un *)malloc(sizeof *sun);
737 memset(sun, 0, sizeof *sun);
738 sun->sun_family = AF_LOCAL;
739 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
740 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
752 __rpc_seman2socktype(int semantics)
757 case NC_TPI_COTS_ORD:
769 __rpc_socktype2seman(int socktype)
775 return NC_TPI_COTS_ORD;
786 * XXXX - IPv6 scope IDs can't be handled in universal addresses.
787 * Here, we compare the original server address to that of the RPC
788 * service we just received back from a call to rpcbind on the remote
789 * machine. If they are both "link local" or "site local", copy
790 * the scope id of the server address over to the service address.
793 __rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
796 struct sockaddr *sa_new, *sa_svc;
797 struct sockaddr_in6 *sin6_new, *sin6_svc;
799 sa_svc = (struct sockaddr *)svc->buf;
800 sa_new = (struct sockaddr *)new->buf;
802 if (sa_new->sa_family == sa_svc->sa_family &&
803 sa_new->sa_family == AF_INET6) {
804 sin6_new = (struct sockaddr_in6 *)new->buf;
805 sin6_svc = (struct sockaddr_in6 *)svc->buf;
807 if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
808 IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
809 (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
810 IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
811 sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
819 __rpc_sockisbound(int fd)
821 struct sockaddr_storage ss;
824 slen = sizeof (struct sockaddr_storage);
825 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
828 switch (ss.ss_family) {
830 return (((struct sockaddr_in *)
831 (void *)&ss)->sin_port != 0);
834 return (((struct sockaddr_in6 *)
835 (void *)&ss)->sin6_port != 0);
839 return (((struct sockaddr_un *)
840 (void *)&ss)->sun_path[0] != '\0');