1 /* $NetBSD: check_bound.c,v 1.2 2000/06/22 08:09:26 fvdl Exp $ */
5 * Copyright (c) 2009, Sun Microsystems, Inc.
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13 * this list of conditions and the following disclaimer in the documentation
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19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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32 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
35 /* #ident "@(#)check_bound.c 1.15 93/07/05 SMI" */
39 static char sccsid[] = "@(#)check_bound.c 1.11 89/04/21 Copyr 1989 Sun Micro";
45 * Checks to see whether the program is still bound to the
46 * claimed address and returns the universal merged address
50 #include <sys/types.h>
51 #include <sys/socket.h>
53 #include <rpc/svc_dg.h>
55 #include <netconfig.h>
65 struct netconfig *nconf;
70 static struct fdlist *fdhead; /* Link list of the check fd's */
71 static struct fdlist *fdtail;
72 static char *nullstring = "";
74 static bool_t check_bound(struct fdlist *, char *uaddr);
77 * Returns 1 if the given address is bound for the given addr & transport
78 * For all error cases, we assume that the address is bound
79 * Returns 0 for success.
82 check_bound(struct fdlist *fdl, char *uaddr)
88 if (fdl->check_binding == FALSE)
91 na = uaddr2taddr(fdl->nconf, uaddr);
93 return (TRUE); /* punt, should never happen */
95 fd = __rpc_nconf2fd(fdl->nconf);
102 ans = bind(fd, (struct sockaddr *)na->buf, na->len);
108 return (ans == 0 ? FALSE : TRUE);
112 add_bndlist(struct netconfig *nconf, struct netbuf *baddr __unused)
115 struct netconfig *newnconf;
117 newnconf = getnetconfigent(nconf->nc_netid);
118 if (newnconf == NULL)
120 fdl = malloc(sizeof (struct fdlist));
122 freenetconfigent(newnconf);
123 syslog(LOG_ERR, "no memory!");
126 fdl->nconf = newnconf;
128 if (fdhead == NULL) {
135 /* XXX no bound checking for now */
136 fdl->check_binding = FALSE;
142 is_bound(char *netid, char *uaddr)
146 for (fdl = fdhead; fdl; fdl = fdl->next)
147 if (strcmp(fdl->nconf->nc_netid, netid) == 0)
151 return (check_bound(fdl, uaddr));
155 * Returns NULL if there was some system error.
156 * Returns "" if the address was not bound, i.e the server crashed.
157 * Returns the merged address otherwise.
160 mergeaddr(SVCXPRT *xprt, char *netid, char *uaddr, char *saddr)
163 struct svc_dg_data *dg_data;
164 char *c_uaddr, *s_uaddr, *m_uaddr, *allocated_uaddr = NULL;
166 for (fdl = fdhead; fdl; fdl = fdl->next)
167 if (strcmp(fdl->nconf->nc_netid, netid) == 0)
171 if (check_bound(fdl, uaddr) == FALSE)
172 /* that server died */
175 * Try to determine the local address on which the client contacted us,
176 * so we can send a reply from the same address. If it's unknown, then
177 * try to determine which address the client used, and pick a nearby
180 * If saddr is not NULL, the remote client may have included the
181 * address by which it contacted us. Use that for the "client" uaddr,
182 * otherwise use the info from the SVCXPRT.
184 dg_data = (struct svc_dg_data*)xprt->xp_p2;
185 if (dg_data != NULL && dg_data->su_srcaddr.buf != NULL) {
186 c_uaddr = taddr2uaddr(fdl->nconf, &dg_data->su_srcaddr);
187 allocated_uaddr = c_uaddr;
189 else if (saddr != NULL) {
192 c_uaddr = taddr2uaddr(fdl->nconf, svc_getrpccaller(xprt));
193 allocated_uaddr = c_uaddr;
195 if (c_uaddr == NULL) {
196 syslog(LOG_ERR, "taddr2uaddr failed for %s",
197 fdl->nconf->nc_netid);
204 fprintf(stderr, "mergeaddr: client uaddr = %s\n",
207 fprintf(stderr, "mergeaddr: contact uaddr = %s\n",
214 * This is all we should need for IP 4 and 6
216 m_uaddr = addrmerge(svc_getrpccaller(xprt), s_uaddr, c_uaddr, netid);
219 fprintf(stderr, "mergeaddr: uaddr = %s, merged uaddr = %s\n",
222 free(allocated_uaddr);
227 * Returns a netconf structure from its internal list. This
228 * structure should not be freed.
231 rpcbind_get_conf(const char *netid)
235 for (fdl = fdhead; fdl; fdl = fdl->next)
236 if (strcmp(fdl->nconf->nc_netid, netid) == 0)