2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3 * unrestricted use provided that this legend is included on all tape
4 * media and as a part of the software program in whole or part. Users
5 * may copy or modify Sun RPC without charge, but are not authorized
6 * to license or distribute it to anyone else except as part of a product or
7 * program developed by the user.
9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
13 * Sun RPC is provided with no support and without any obligation on the
14 * part of Sun Microsystems, Inc. to assist in its use, correction,
15 * modification or enhancement.
17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19 * OR ANY PART THEREOF.
21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
22 * or profits or other special, indirect and consequential damages, even if
23 * Sun has been advised of the possibility of such damages.
25 * Sun Microsystems, Inc.
27 * Mountain View, California 94043
28 * @(#)rpc_generic.c 1.17 94/04/24 SMI
29 * $NetBSD: rpc_generic.c,v 1.4 2000/09/28 09:07:04 kleink Exp $
30 * $FreeBSD: src/lib/libc/rpc/rpc_generic.c,v 1.14 2007/09/20 22:35:24 matteo Exp $
33 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
37 * rpc_generic.c, Misc routines for RPC.
41 #include "namespace.h"
42 #include "reentrant.h"
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/socket.h>
48 #include <sys/resource.h>
49 #include <netinet/in.h>
50 #include <arpa/inet.h>
56 #include <netconfig.h>
60 #include <rpc/nettype.h>
61 #include "un-namespace.h"
66 NCONF_HANDLE *nhandle;
67 int nflag; /* Whether NETPATH or NETCONFIG */
71 static const struct _rpcnettype {
75 { "netpath", _RPC_NETPATH },
76 { "visible", _RPC_VISIBLE },
77 { "circuit_v", _RPC_CIRCUIT_V },
78 { "datagram_v", _RPC_DATAGRAM_V },
79 { "circuit_n", _RPC_CIRCUIT_N },
80 { "datagram_n", _RPC_DATAGRAM_N },
92 static const struct netid_af na_cvt[] = {
93 { "udp", AF_INET, IPPROTO_UDP },
94 { "tcp", AF_INET, IPPROTO_TCP },
96 { "udp6", AF_INET6, IPPROTO_UDP },
97 { "tcp6", AF_INET6, IPPROTO_TCP },
99 { "local", AF_LOCAL, 0 }
103 static char *strlocase(char *);
105 static int getnettype(const char *);
108 * Cache the result of getrlimit(), so we don't have to do an
109 * expensive call every time.
120 if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
121 return (tbsize = (int)rl.rlim_max);
124 * Something wrong. I'll try to save face by returning a
125 * pessimistic number.
132 * Find the appropriate buffer size
136 __rpc_get_t_size(int af __unused, int proto,
137 int size) /* Size requested */
139 int maxsize, defsize;
141 maxsize = 256 * 1024; /* XXX */
144 defsize = 64 * 1024; /* XXX */
147 defsize = UDPMSGSIZE;
150 defsize = RPC_MAXDATASIZE;
156 /* Check whether the value is within the upper max limit */
157 return (size > maxsize ? (u_int)maxsize : (u_int)size);
161 * Find the appropriate address buffer size
164 __rpc_get_a_size(int af)
168 return sizeof (struct sockaddr_in);
171 return sizeof (struct sockaddr_in6);
174 return sizeof (struct sockaddr_un);
178 return ((u_int)RPC_MAXADDRSIZE);
195 * Returns the type of the network as defined in <rpc/nettype.h>
196 * If nettype is NULL, it defaults to NETPATH.
199 getnettype(const char *nettype)
203 if ((nettype == NULL) || (nettype[0] == 0)) {
204 return (_RPC_NETPATH); /* Default */
208 nettype = strlocase(nettype);
210 for (i = 0; _rpctypelist[i].name; i++)
211 if (strcasecmp(nettype, _rpctypelist[i].name) == 0) {
212 return (_rpctypelist[i].type);
214 return (_rpctypelist[i].type);
218 * For the given nettype (tcp or udp only), return the first structure found.
219 * This should be freed by calling freenetconfigent()
222 __rpc_getconfip(const char *nettype)
225 char *netid_tcp = NULL;
226 char *netid_udp = NULL;
227 static char *netid_tcp_main;
228 static char *netid_udp_main;
229 struct netconfig *dummy;
231 static thread_key_t tcp_key, udp_key;
233 if ((main_thread = thr_main())) {
234 netid_udp = netid_udp_main;
235 netid_tcp = netid_tcp_main;
238 mutex_lock(&tsd_lock);
240 thr_keycreate(&tcp_key, free);
241 mutex_unlock(&tsd_lock);
243 netid_tcp = (char *)thr_getspecific(tcp_key);
245 mutex_lock(&tsd_lock);
247 thr_keycreate(&udp_key, free);
248 mutex_unlock(&tsd_lock);
250 netid_udp = (char *)thr_getspecific(udp_key);
252 if (!netid_udp && !netid_tcp) {
253 struct netconfig *nconf;
256 if (!(confighandle = setnetconfig())) {
257 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
260 while ((nconf = getnetconfig(confighandle)) != NULL) {
261 if (strcmp(nconf->nc_protofmly, NC_INET) == 0) {
262 if (strcmp(nconf->nc_proto, NC_TCP) == 0) {
263 netid_tcp = strdup(nconf->nc_netid);
265 netid_tcp_main = netid_tcp;
267 thr_setspecific(tcp_key,
270 if (strcmp(nconf->nc_proto, NC_UDP) == 0) {
271 netid_udp = strdup(nconf->nc_netid);
273 netid_udp_main = netid_udp;
275 thr_setspecific(udp_key,
280 endnetconfig(confighandle);
282 if (strcmp(nettype, "udp") == 0)
284 else if (strcmp(nettype, "tcp") == 0)
289 if ((netid == NULL) || (netid[0] == 0)) {
292 dummy = getnetconfigent(netid);
297 * Returns the type of the nettype, which should then be used with
301 __rpc_setconf(const char *nettype)
303 struct handle *handle;
305 handle = (struct handle *) malloc(sizeof (struct handle));
306 if (handle == NULL) {
309 switch (handle->nettype = getnettype(nettype)) {
312 case _RPC_DATAGRAM_N:
313 if (!(handle->nhandle = setnetpath()))
315 handle->nflag = TRUE;
319 case _RPC_DATAGRAM_V:
322 if (!(handle->nhandle = setnetconfig())) {
323 syslog (LOG_ERR, "rpc: failed to open " NETCONFIG);
326 handle->nflag = FALSE;
340 * Returns the next netconfig struct for the given "net" type.
341 * __rpc_setconf() should have been called previously.
344 __rpc_getconf(void *vhandle)
346 struct handle *handle;
347 struct netconfig *nconf;
349 handle = (struct handle *)vhandle;
350 if (handle == NULL) {
355 nconf = getnetpath(handle->nhandle);
357 nconf = getnetconfig(handle->nhandle);
360 if ((nconf->nc_semantics != NC_TPI_CLTS) &&
361 (nconf->nc_semantics != NC_TPI_COTS) &&
362 (nconf->nc_semantics != NC_TPI_COTS_ORD))
364 switch (handle->nettype) {
366 if (!(nconf->nc_flag & NC_VISIBLE))
369 case _RPC_NETPATH: /* Be happy */
372 if (!(nconf->nc_flag & NC_VISIBLE))
376 if ((nconf->nc_semantics != NC_TPI_COTS) &&
377 (nconf->nc_semantics != NC_TPI_COTS_ORD))
380 case _RPC_DATAGRAM_V:
381 if (!(nconf->nc_flag & NC_VISIBLE))
384 case _RPC_DATAGRAM_N:
385 if (nconf->nc_semantics != NC_TPI_CLTS)
389 if (((nconf->nc_semantics != NC_TPI_COTS) &&
390 (nconf->nc_semantics != NC_TPI_COTS_ORD)) ||
391 (strcmp(nconf->nc_protofmly, NC_INET)
393 && strcmp(nconf->nc_protofmly, NC_INET6))
398 strcmp(nconf->nc_proto, NC_TCP))
402 if ((nconf->nc_semantics != NC_TPI_CLTS) ||
403 (strcmp(nconf->nc_protofmly, NC_INET)
405 && strcmp(nconf->nc_protofmly, NC_INET6))
410 strcmp(nconf->nc_proto, NC_UDP))
420 __rpc_endconf(void *vhandle)
422 struct handle *handle;
424 handle = (struct handle *) vhandle;
425 if (handle == NULL) {
429 endnetpath(handle->nhandle);
431 endnetconfig(handle->nhandle);
437 * Used to ping the NULL procedure for clnt handle.
438 * Returns NULL if fails, else a non-NULL pointer.
441 rpc_nullproc(CLIENT *clnt)
443 struct timeval TIMEOUT = {25, 0};
445 if (clnt_call(clnt, NULLPROC, (xdrproc_t) xdr_void, NULL,
446 (xdrproc_t) xdr_void, NULL, TIMEOUT) != RPC_SUCCESS) {
449 return ((void *) clnt);
453 * Try all possible transports until
454 * one succeeds in finding the netconf for the given fd.
460 struct __rpc_sockinfo si;
462 if (!__rpc_fd2sockinfo(fd, &si))
465 if (!__rpc_sockinfo2netid(&si, &netid))
468 /*LINTED const castaway*/
469 return getnetconfigent((char *)netid);
473 __rpc_fd2sockinfo(int fd, struct __rpc_sockinfo *sip)
477 struct sockaddr_storage ss;
480 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &len) < 0)
485 if (_getsockopt(fd, SOL_SOCKET, SO_TYPE, &type, &len) < 0)
489 if (ss.ss_family != AF_LOCAL) {
490 if (type == SOCK_STREAM)
492 else if (type == SOCK_DGRAM)
499 sip->si_af = ss.ss_family;
500 sip->si_proto = proto;
501 sip->si_socktype = type;
507 * Linear search, but the number of entries is small.
510 __rpc_nconf2sockinfo(const struct netconfig *nconf, struct __rpc_sockinfo *sip)
514 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++)
515 if (strcmp(na_cvt[i].netid, nconf->nc_netid) == 0 || (
516 strcmp(nconf->nc_netid, "unix") == 0 &&
517 strcmp(na_cvt[i].netid, "local") == 0)) {
518 sip->si_af = na_cvt[i].af;
519 sip->si_proto = na_cvt[i].protocol;
521 __rpc_seman2socktype((int)nconf->nc_semantics);
522 if (sip->si_socktype == -1)
524 sip->si_alen = __rpc_get_a_size(sip->si_af);
532 __rpc_nconf2fd(const struct netconfig *nconf)
534 struct __rpc_sockinfo si;
536 if (!__rpc_nconf2sockinfo(nconf, &si))
539 return _socket(si.si_af, si.si_socktype, si.si_proto);
543 __rpc_sockinfo2netid(struct __rpc_sockinfo *sip, const char **netid)
546 struct netconfig *nconf;
548 nconf = getnetconfigent("local");
550 for (i = 0; i < (sizeof na_cvt) / (sizeof (struct netid_af)); i++) {
551 if (na_cvt[i].af == sip->si_af &&
552 na_cvt[i].protocol == sip->si_proto) {
553 if (strcmp(na_cvt[i].netid, "local") == 0 && nconf == NULL) {
558 *netid = na_cvt[i].netid;
561 freenetconfigent(nconf);
566 freenetconfigent(nconf);
572 taddr2uaddr(const struct netconfig *nconf, const struct netbuf *nbuf)
574 struct __rpc_sockinfo si;
576 if (!__rpc_nconf2sockinfo(nconf, &si))
578 return __rpc_taddr2uaddr_af(si.si_af, nbuf);
582 uaddr2taddr(const struct netconfig *nconf, const char *uaddr)
584 struct __rpc_sockinfo si;
586 if (!__rpc_nconf2sockinfo(nconf, &si))
588 return __rpc_uaddr2taddr_af(si.si_af, uaddr);
592 __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
595 struct sockaddr_in *sin;
596 struct sockaddr_un *sun;
597 char namebuf[INET_ADDRSTRLEN];
599 struct sockaddr_in6 *sin6;
600 char namebuf6[INET6_ADDRSTRLEN];
607 if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
610 port = ntohs(sin->sin_port);
611 if (asprintf(&ret, "%s.%u.%u", namebuf, ((u_int32_t)port) >> 8,
618 if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
621 port = ntohs(sin6->sin6_port);
622 if (asprintf(&ret, "%s.%u.%u", namebuf6, ((u_int32_t)port) >> 8,
629 if (asprintf(&ret, "%.*s", (int)(sun->sun_len -
630 offsetof(struct sockaddr_un, sun_path)),
642 __rpc_uaddr2taddr_af(int af, const char *uaddr)
644 struct netbuf *ret = NULL;
646 unsigned port, portlo, porthi;
647 struct sockaddr_in *sin;
649 struct sockaddr_in6 *sin6;
651 struct sockaddr_un *sun;
655 addrstr = strdup(uaddr);
660 * AF_LOCAL addresses are expected to be absolute
661 * pathnames, anything else will be AF_INET or AF_INET6.
663 if (*addrstr != '/') {
664 p = strrchr(addrstr, '.');
667 portlo = (unsigned)atoi(p + 1);
670 p = strrchr(addrstr, '.');
673 porthi = (unsigned)atoi(p + 1);
675 port = (porthi << 8) | portlo;
678 ret = (struct netbuf *)malloc(sizeof *ret);
684 sin = (struct sockaddr_in *)malloc(sizeof *sin);
687 memset(sin, 0, sizeof *sin);
688 sin->sin_family = AF_INET;
689 sin->sin_port = htons(port);
690 if (inet_pton(AF_INET, addrstr, &sin->sin_addr) <= 0) {
696 sin->sin_len = ret->maxlen = ret->len = sizeof *sin;
701 sin6 = (struct sockaddr_in6 *)malloc(sizeof *sin6);
704 memset(sin6, 0, sizeof *sin6);
705 sin6->sin6_family = AF_INET6;
706 sin6->sin6_port = htons(port);
707 if (inet_pton(AF_INET6, addrstr, &sin6->sin6_addr) <= 0) {
713 sin6->sin6_len = ret->maxlen = ret->len = sizeof *sin6;
718 sun = (struct sockaddr_un *)malloc(sizeof *sun);
721 memset(sun, 0, sizeof *sun);
722 sun->sun_family = AF_LOCAL;
723 strncpy(sun->sun_path, addrstr, sizeof(sun->sun_path) - 1);
724 ret->len = ret->maxlen = sun->sun_len = SUN_LEN(sun);
736 __rpc_seman2socktype(int semantics)
741 case NC_TPI_COTS_ORD:
753 __rpc_socktype2seman(int socktype)
759 return NC_TPI_COTS_ORD;
770 * XXXX - IPv6 scope IDs can't be handled in universal addresses.
771 * Here, we compare the original server address to that of the RPC
772 * service we just received back from a call to rpcbind on the remote
773 * machine. If they are both "link local" or "site local", copy
774 * the scope id of the server address over to the service address.
777 __rpc_fixup_addr(struct netbuf *new, const struct netbuf *svc)
780 struct sockaddr *sa_new, *sa_svc;
781 struct sockaddr_in6 *sin6_new, *sin6_svc;
783 sa_svc = (struct sockaddr *)svc->buf;
784 sa_new = (struct sockaddr *)new->buf;
786 if (sa_new->sa_family == sa_svc->sa_family &&
787 sa_new->sa_family == AF_INET6) {
788 sin6_new = (struct sockaddr_in6 *)new->buf;
789 sin6_svc = (struct sockaddr_in6 *)svc->buf;
791 if ((IN6_IS_ADDR_LINKLOCAL(&sin6_new->sin6_addr) &&
792 IN6_IS_ADDR_LINKLOCAL(&sin6_svc->sin6_addr)) ||
793 (IN6_IS_ADDR_SITELOCAL(&sin6_new->sin6_addr) &&
794 IN6_IS_ADDR_SITELOCAL(&sin6_svc->sin6_addr))) {
795 sin6_new->sin6_scope_id = sin6_svc->sin6_scope_id;
803 __rpc_sockisbound(int fd)
805 struct sockaddr_storage ss;
808 slen = sizeof (struct sockaddr_storage);
809 if (_getsockname(fd, (struct sockaddr *)(void *)&ss, &slen) < 0)
812 switch (ss.ss_family) {
814 return (((struct sockaddr_in *)
815 (void *)&ss)->sin_port != 0);
818 return (((struct sockaddr_in6 *)
819 (void *)&ss)->sin6_port != 0);
823 return (((struct sockaddr_un *)
824 (void *)&ss)->sun_path[0] != '\0');