1 /* $NetBSD: check_bound.c,v 1.2 2000/06/22 08:09:26 fvdl Exp $ */
5 * SPDX-License-Identifier: BSD-3-Clause
7 * Copyright (c) 2009, Sun Microsystems, Inc.
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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
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31 * POSSIBILITY OF SUCH DAMAGE.
34 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
37 /* #ident "@(#)check_bound.c 1.15 93/07/05 SMI" */
41 static char sccsid[] = "@(#)check_bound.c 1.11 89/04/21 Copyr 1989 Sun Micro";
47 * Checks to see whether the program is still bound to the
48 * claimed address and returns the universal merged address
52 #include <sys/types.h>
53 #include <sys/socket.h>
55 #include <rpc/svc_dg.h>
56 #include <netconfig.h>
66 struct netconfig *nconf;
71 static struct fdlist *fdhead; /* Link list of the check fd's */
72 static struct fdlist *fdtail;
73 static char *nullstring = "";
75 static bool_t check_bound(struct fdlist *, char *uaddr);
78 * Returns 1 if the given address is bound for the given addr & transport
79 * For all error cases, we assume that the address is bound
80 * Returns 0 for success.
83 check_bound(struct fdlist *fdl, char *uaddr)
89 if (fdl->check_binding == FALSE)
92 na = uaddr2taddr(fdl->nconf, uaddr);
94 return (TRUE); /* punt, should never happen */
96 fd = __rpc_nconf2fd(fdl->nconf);
103 ans = bind(fd, (struct sockaddr *)na->buf, na->len);
109 return (ans == 0 ? FALSE : TRUE);
113 add_bndlist(struct netconfig *nconf, struct netbuf *baddr __unused)
116 struct netconfig *newnconf;
118 newnconf = getnetconfigent(nconf->nc_netid);
119 if (newnconf == NULL)
121 fdl = malloc(sizeof (struct fdlist));
123 freenetconfigent(newnconf);
124 syslog(LOG_ERR, "no memory!");
127 fdl->nconf = newnconf;
129 if (fdhead == NULL) {
136 /* XXX no bound checking for now */
137 fdl->check_binding = FALSE;
143 is_bound(char *netid, char *uaddr)
147 for (fdl = fdhead; fdl; fdl = fdl->next)
148 if (strcmp(fdl->nconf->nc_netid, netid) == 0)
152 return (check_bound(fdl, uaddr));
156 * Returns NULL if there was some system error.
157 * Returns "" if the address was not bound, i.e the server crashed.
158 * Returns the merged address otherwise.
161 mergeaddr(SVCXPRT *xprt, char *netid, char *uaddr, char *saddr)
164 struct svc_dg_data *dg_data;
165 char *c_uaddr, *s_uaddr, *m_uaddr, *allocated_uaddr = NULL;
167 for (fdl = fdhead; fdl; fdl = fdl->next)
168 if (strcmp(fdl->nconf->nc_netid, netid) == 0)
172 if (check_bound(fdl, uaddr) == FALSE)
173 /* that server died */
176 * Try to determine the local address on which the client contacted us,
177 * so we can send a reply from the same address. If it's unknown, then
178 * try to determine which address the client used, and pick a nearby
181 * If saddr is not NULL, the remote client may have included the
182 * address by which it contacted us. Use that for the "client" uaddr,
183 * otherwise use the info from the SVCXPRT.
185 dg_data = (struct svc_dg_data*)xprt->xp_p2;
186 if (dg_data != NULL && dg_data->su_srcaddr.buf != NULL) {
187 c_uaddr = taddr2uaddr(fdl->nconf, &dg_data->su_srcaddr);
188 allocated_uaddr = c_uaddr;
190 else if (saddr != NULL) {
193 c_uaddr = taddr2uaddr(fdl->nconf, svc_getrpccaller(xprt));
194 allocated_uaddr = c_uaddr;
196 if (c_uaddr == NULL) {
197 syslog(LOG_ERR, "taddr2uaddr failed for %s",
198 fdl->nconf->nc_netid);
205 fprintf(stderr, "mergeaddr: client uaddr = %s\n",
208 fprintf(stderr, "mergeaddr: contact uaddr = %s\n",
215 * This is all we should need for IP 4 and 6
217 m_uaddr = addrmerge(svc_getrpccaller(xprt), s_uaddr, c_uaddr, netid);
220 fprintf(stderr, "mergeaddr: uaddr = %s, merged uaddr = %s\n",
223 free(allocated_uaddr);
228 * Returns a netconf structure from its internal list. This
229 * structure should not be freed.
232 rpcbind_get_conf(const char *netid)
236 for (fdl = fdhead; fdl; fdl = fdl->next)
237 if (strcmp(fdl->nconf->nc_netid, netid) == 0)