1/* $NetBSD: check_bound.c,v 1.2 2000/06/22 08:09:26 fvdl Exp $ */
| 1/* $NetBSD: check_bound.c,v 1.2 2000/06/22 08:09:26 fvdl Exp $ */
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2/* $FreeBSD: head/usr.sbin/rpcbind/check_bound.c 258564 2013-11-25 16:44:02Z hrs $ */
| 2/* $FreeBSD: head/usr.sbin/rpcbind/check_bound.c 293229 2016-01-06 00:00:11Z asomers $ */
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3 4/*- 5 * Copyright (c) 2009, Sun Microsystems, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * - Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * - Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * - Neither the name of Sun Microsystems, Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31/* 32 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 33 */ 34 35/* #ident "@(#)check_bound.c 1.15 93/07/05 SMI" */ 36 37#if 0 38#ifndef lint 39static char sccsid[] = "@(#)check_bound.c 1.11 89/04/21 Copyr 1989 Sun Micro"; 40#endif 41#endif 42 43/* 44 * check_bound.c 45 * Checks to see whether the program is still bound to the 46 * claimed address and returns the universal merged address 47 * 48 */ 49 50#include <sys/types.h> 51#include <sys/socket.h> 52#include <rpc/rpc.h>
| 3 4/*- 5 * Copyright (c) 2009, Sun Microsystems, Inc. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * - Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * - Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * - Neither the name of Sun Microsystems, Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31/* 32 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 33 */ 34 35/* #ident "@(#)check_bound.c 1.15 93/07/05 SMI" */ 36 37#if 0 38#ifndef lint 39static char sccsid[] = "@(#)check_bound.c 1.11 89/04/21 Copyr 1989 Sun Micro"; 40#endif 41#endif 42 43/* 44 * check_bound.c 45 * Checks to see whether the program is still bound to the 46 * claimed address and returns the universal merged address 47 * 48 */ 49 50#include <sys/types.h> 51#include <sys/socket.h> 52#include <rpc/rpc.h>
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| 53#include <rpc/svc_dg.h>
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53#include <stdio.h> 54#include <netconfig.h> 55#include <syslog.h> 56#include <string.h> 57#include <unistd.h> 58#include <stdlib.h> 59 60#include "rpcbind.h" 61 62struct fdlist { 63 int fd; 64 struct netconfig *nconf; 65 struct fdlist *next; 66 int check_binding; 67}; 68 69static struct fdlist *fdhead; /* Link list of the check fd's */ 70static struct fdlist *fdtail; 71static char *nullstring = ""; 72 73static bool_t check_bound(struct fdlist *, char *uaddr); 74 75/* 76 * Returns 1 if the given address is bound for the given addr & transport 77 * For all error cases, we assume that the address is bound 78 * Returns 0 for success. 79 */ 80static bool_t 81check_bound(struct fdlist *fdl, char *uaddr) 82{ 83 int fd; 84 struct netbuf *na; 85 int ans; 86 87 if (fdl->check_binding == FALSE) 88 return (TRUE); 89 90 na = uaddr2taddr(fdl->nconf, uaddr); 91 if (!na) 92 return (TRUE); /* punt, should never happen */ 93 94 fd = __rpc_nconf2fd(fdl->nconf); 95 if (fd < 0) { 96 free(na->buf); 97 free(na); 98 return (TRUE); 99 } 100 101 ans = bind(fd, (struct sockaddr *)na->buf, na->len); 102 103 close(fd); 104 free(na->buf); 105 free(na); 106 107 return (ans == 0 ? FALSE : TRUE); 108} 109 110int 111add_bndlist(struct netconfig *nconf, struct netbuf *baddr __unused) 112{ 113 struct fdlist *fdl; 114 struct netconfig *newnconf; 115 116 newnconf = getnetconfigent(nconf->nc_netid); 117 if (newnconf == NULL) 118 return (-1); 119 fdl = malloc(sizeof (struct fdlist)); 120 if (fdl == NULL) { 121 freenetconfigent(newnconf); 122 syslog(LOG_ERR, "no memory!"); 123 return (-1); 124 } 125 fdl->nconf = newnconf; 126 fdl->next = NULL; 127 if (fdhead == NULL) { 128 fdhead = fdl; 129 fdtail = fdl; 130 } else { 131 fdtail->next = fdl; 132 fdtail = fdl; 133 } 134 /* XXX no bound checking for now */ 135 fdl->check_binding = FALSE; 136 137 return 0; 138} 139 140bool_t 141is_bound(char *netid, char *uaddr) 142{ 143 struct fdlist *fdl; 144 145 for (fdl = fdhead; fdl; fdl = fdl->next) 146 if (strcmp(fdl->nconf->nc_netid, netid) == 0) 147 break; 148 if (fdl == NULL) 149 return (TRUE); 150 return (check_bound(fdl, uaddr)); 151} 152 153/* 154 * Returns NULL if there was some system error. 155 * Returns "" if the address was not bound, i.e the server crashed. 156 * Returns the merged address otherwise. 157 */ 158char * 159mergeaddr(SVCXPRT *xprt, char *netid, char *uaddr, char *saddr) 160{ 161 struct fdlist *fdl;
| 54#include <stdio.h> 55#include <netconfig.h> 56#include <syslog.h> 57#include <string.h> 58#include <unistd.h> 59#include <stdlib.h> 60 61#include "rpcbind.h" 62 63struct fdlist { 64 int fd; 65 struct netconfig *nconf; 66 struct fdlist *next; 67 int check_binding; 68}; 69 70static struct fdlist *fdhead; /* Link list of the check fd's */ 71static struct fdlist *fdtail; 72static char *nullstring = ""; 73 74static bool_t check_bound(struct fdlist *, char *uaddr); 75 76/* 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. 80 */ 81static bool_t 82check_bound(struct fdlist *fdl, char *uaddr) 83{ 84 int fd; 85 struct netbuf *na; 86 int ans; 87 88 if (fdl->check_binding == FALSE) 89 return (TRUE); 90 91 na = uaddr2taddr(fdl->nconf, uaddr); 92 if (!na) 93 return (TRUE); /* punt, should never happen */ 94 95 fd = __rpc_nconf2fd(fdl->nconf); 96 if (fd < 0) { 97 free(na->buf); 98 free(na); 99 return (TRUE); 100 } 101 102 ans = bind(fd, (struct sockaddr *)na->buf, na->len); 103 104 close(fd); 105 free(na->buf); 106 free(na); 107 108 return (ans == 0 ? FALSE : TRUE); 109} 110 111int 112add_bndlist(struct netconfig *nconf, struct netbuf *baddr __unused) 113{ 114 struct fdlist *fdl; 115 struct netconfig *newnconf; 116 117 newnconf = getnetconfigent(nconf->nc_netid); 118 if (newnconf == NULL) 119 return (-1); 120 fdl = malloc(sizeof (struct fdlist)); 121 if (fdl == NULL) { 122 freenetconfigent(newnconf); 123 syslog(LOG_ERR, "no memory!"); 124 return (-1); 125 } 126 fdl->nconf = newnconf; 127 fdl->next = NULL; 128 if (fdhead == NULL) { 129 fdhead = fdl; 130 fdtail = fdl; 131 } else { 132 fdtail->next = fdl; 133 fdtail = fdl; 134 } 135 /* XXX no bound checking for now */ 136 fdl->check_binding = FALSE; 137 138 return 0; 139} 140 141bool_t 142is_bound(char *netid, char *uaddr) 143{ 144 struct fdlist *fdl; 145 146 for (fdl = fdhead; fdl; fdl = fdl->next) 147 if (strcmp(fdl->nconf->nc_netid, netid) == 0) 148 break; 149 if (fdl == NULL) 150 return (TRUE); 151 return (check_bound(fdl, uaddr)); 152} 153 154/* 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. 158 */ 159char * 160mergeaddr(SVCXPRT *xprt, char *netid, char *uaddr, char *saddr) 161{ 162 struct fdlist *fdl;
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| 163 struct svc_dg_data *dg_data;
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162 char *c_uaddr, *s_uaddr, *m_uaddr, *allocated_uaddr = NULL; 163 164 for (fdl = fdhead; fdl; fdl = fdl->next) 165 if (strcmp(fdl->nconf->nc_netid, netid) == 0) 166 break; 167 if (fdl == NULL) 168 return (NULL); 169 if (check_bound(fdl, uaddr) == FALSE) 170 /* that server died */ 171 return (nullstring); 172 /*
| 164 char *c_uaddr, *s_uaddr, *m_uaddr, *allocated_uaddr = NULL; 165 166 for (fdl = fdhead; fdl; fdl = fdl->next) 167 if (strcmp(fdl->nconf->nc_netid, netid) == 0) 168 break; 169 if (fdl == NULL) 170 return (NULL); 171 if (check_bound(fdl, uaddr) == FALSE) 172 /* that server died */ 173 return (nullstring); 174 /*
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| 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 178 * local address. 179 *
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173 * If saddr is not NULL, the remote client may have included the 174 * address by which it contacted us. Use that for the "client" uaddr, 175 * otherwise use the info from the SVCXPRT. 176 */
| 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. 183 */
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177 if (saddr != NULL) {
| 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 } 188 else if (saddr != NULL) {
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178 c_uaddr = saddr; 179 } else { 180 c_uaddr = taddr2uaddr(fdl->nconf, svc_getrpccaller(xprt)); 181 if (c_uaddr == NULL) { 182 syslog(LOG_ERR, "taddr2uaddr failed for %s", 183 fdl->nconf->nc_netid); 184 return (NULL); 185 } 186 allocated_uaddr = c_uaddr; 187 } 188 189#ifdef ND_DEBUG 190 if (debugging) { 191 if (saddr == NULL) { 192 fprintf(stderr, "mergeaddr: client uaddr = %s\n", 193 c_uaddr); 194 } else { 195 fprintf(stderr, "mergeaddr: contact uaddr = %s\n", 196 c_uaddr); 197 } 198 } 199#endif 200 s_uaddr = uaddr; 201 /* 202 * This is all we should need for IP 4 and 6 203 */ 204 m_uaddr = addrmerge(svc_getrpccaller(xprt), s_uaddr, c_uaddr, netid); 205#ifdef ND_DEBUG 206 if (debugging) 207 fprintf(stderr, "mergeaddr: uaddr = %s, merged uaddr = %s\n", 208 uaddr, m_uaddr); 209#endif 210 if (allocated_uaddr != NULL) 211 free(allocated_uaddr); 212 return (m_uaddr); 213} 214 215/* 216 * Returns a netconf structure from its internal list. This 217 * structure should not be freed. 218 */ 219struct netconfig *
| 189 c_uaddr = saddr; 190 } else { 191 c_uaddr = taddr2uaddr(fdl->nconf, svc_getrpccaller(xprt)); 192 if (c_uaddr == NULL) { 193 syslog(LOG_ERR, "taddr2uaddr failed for %s", 194 fdl->nconf->nc_netid); 195 return (NULL); 196 } 197 allocated_uaddr = c_uaddr; 198 } 199 200#ifdef ND_DEBUG 201 if (debugging) { 202 if (saddr == NULL) { 203 fprintf(stderr, "mergeaddr: client uaddr = %s\n", 204 c_uaddr); 205 } else { 206 fprintf(stderr, "mergeaddr: contact uaddr = %s\n", 207 c_uaddr); 208 } 209 } 210#endif 211 s_uaddr = uaddr; 212 /* 213 * This is all we should need for IP 4 and 6 214 */ 215 m_uaddr = addrmerge(svc_getrpccaller(xprt), s_uaddr, c_uaddr, netid); 216#ifdef ND_DEBUG 217 if (debugging) 218 fprintf(stderr, "mergeaddr: uaddr = %s, merged uaddr = %s\n", 219 uaddr, m_uaddr); 220#endif 221 if (allocated_uaddr != NULL) 222 free(allocated_uaddr); 223 return (m_uaddr); 224} 225 226/* 227 * Returns a netconf structure from its internal list. This 228 * structure should not be freed. 229 */ 230struct netconfig *
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220rpcbind_get_conf(char *netid)
| 231rpcbind_get_conf(const char *netid)
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221{ 222 struct fdlist *fdl; 223 224 for (fdl = fdhead; fdl; fdl = fdl->next) 225 if (strcmp(fdl->nconf->nc_netid, netid) == 0) 226 break; 227 if (fdl == NULL) 228 return (NULL); 229 return (fdl->nconf); 230}
| 232{ 233 struct fdlist *fdl; 234 235 for (fdl = fdhead; fdl; fdl = fdl->next) 236 if (strcmp(fdl->nconf->nc_netid, netid) == 0) 237 break; 238 if (fdl == NULL) 239 return (NULL); 240 return (fdl->nconf); 241}
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