check_bound.c revision 1.2.2.2
1 1.2.2.2 minoura /* $NetBSD: check_bound.c,v 1.2.2.2 2000/06/22 18:01:11 minoura Exp $ */ 2 1.2.2.2 minoura 3 1.2.2.2 minoura /* 4 1.2.2.2 minoura * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 1.2.2.2 minoura * unrestricted use provided that this legend is included on all tape 6 1.2.2.2 minoura * media and as a part of the software program in whole or part. Users 7 1.2.2.2 minoura * may copy or modify Sun RPC without charge, but are not authorized 8 1.2.2.2 minoura * to license or distribute it to anyone else except as part of a product or 9 1.2.2.2 minoura * program developed by the user. 10 1.2.2.2 minoura * 11 1.2.2.2 minoura * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 1.2.2.2 minoura * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 1.2.2.2 minoura * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 1.2.2.2 minoura * 15 1.2.2.2 minoura * Sun RPC is provided with no support and without any obligation on the 16 1.2.2.2 minoura * part of Sun Microsystems, Inc. to assist in its use, correction, 17 1.2.2.2 minoura * modification or enhancement. 18 1.2.2.2 minoura * 19 1.2.2.2 minoura * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 1.2.2.2 minoura * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 1.2.2.2 minoura * OR ANY PART THEREOF. 22 1.2.2.2 minoura * 23 1.2.2.2 minoura * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 1.2.2.2 minoura * or profits or other special, indirect and consequential damages, even if 25 1.2.2.2 minoura * Sun has been advised of the possibility of such damages. 26 1.2.2.2 minoura * 27 1.2.2.2 minoura * Sun Microsystems, Inc. 28 1.2.2.2 minoura * 2550 Garcia Avenue 29 1.2.2.2 minoura * Mountain View, California 94043 30 1.2.2.2 minoura */ 31 1.2.2.2 minoura /* 32 1.2.2.2 minoura * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 33 1.2.2.2 minoura */ 34 1.2.2.2 minoura 35 1.2.2.2 minoura /* #ident "@(#)check_bound.c 1.15 93/07/05 SMI" */ 36 1.2.2.2 minoura 37 1.2.2.2 minoura #if 0 38 1.2.2.2 minoura #ifndef lint 39 1.2.2.2 minoura static char sccsid[] = "@(#)check_bound.c 1.11 89/04/21 Copyr 1989 Sun Micro"; 40 1.2.2.2 minoura #endif 41 1.2.2.2 minoura #endif 42 1.2.2.2 minoura 43 1.2.2.2 minoura /* 44 1.2.2.2 minoura * check_bound.c 45 1.2.2.2 minoura * Checks to see whether the program is still bound to the 46 1.2.2.2 minoura * claimed address and returns the univeral merged address 47 1.2.2.2 minoura * 48 1.2.2.2 minoura */ 49 1.2.2.2 minoura 50 1.2.2.2 minoura #include <sys/types.h> 51 1.2.2.2 minoura #include <sys/socket.h> 52 1.2.2.2 minoura #include <rpc/rpc.h> 53 1.2.2.2 minoura #include <stdio.h> 54 1.2.2.2 minoura #include <netconfig.h> 55 1.2.2.2 minoura #include <syslog.h> 56 1.2.2.2 minoura #include <string.h> 57 1.2.2.2 minoura #include <unistd.h> 58 1.2.2.2 minoura #include <stdlib.h> 59 1.2.2.2 minoura 60 1.2.2.2 minoura #include "rpcbind.h" 61 1.2.2.2 minoura 62 1.2.2.2 minoura struct fdlist { 63 1.2.2.2 minoura int fd; 64 1.2.2.2 minoura struct netconfig *nconf; 65 1.2.2.2 minoura struct fdlist *next; 66 1.2.2.2 minoura int check_binding; 67 1.2.2.2 minoura }; 68 1.2.2.2 minoura 69 1.2.2.2 minoura static struct fdlist *fdhead; /* Link list of the check fd's */ 70 1.2.2.2 minoura static struct fdlist *fdtail; 71 1.2.2.2 minoura static char *nullstring = ""; 72 1.2.2.2 minoura 73 1.2.2.2 minoura static bool_t check_bound __P((struct fdlist *, char *uaddr)); 74 1.2.2.2 minoura 75 1.2.2.2 minoura /* 76 1.2.2.2 minoura * Returns 1 if the given address is bound for the given addr & transport 77 1.2.2.2 minoura * For all error cases, we assume that the address is bound 78 1.2.2.2 minoura * Returns 0 for success. 79 1.2.2.2 minoura */ 80 1.2.2.2 minoura static bool_t 81 1.2.2.2 minoura check_bound(struct fdlist *fdl, char *uaddr) 82 1.2.2.2 minoura { 83 1.2.2.2 minoura int fd; 84 1.2.2.2 minoura struct netbuf *na; 85 1.2.2.2 minoura int ans; 86 1.2.2.2 minoura 87 1.2.2.2 minoura if (fdl->check_binding == FALSE) 88 1.2.2.2 minoura return (TRUE); 89 1.2.2.2 minoura 90 1.2.2.2 minoura na = uaddr2taddr(fdl->nconf, uaddr); 91 1.2.2.2 minoura if (!na) 92 1.2.2.2 minoura return (TRUE); /* punt, should never happen */ 93 1.2.2.2 minoura 94 1.2.2.2 minoura fd = __rpc_nconf2fd(fdl->nconf); 95 1.2.2.2 minoura if (fd < 0) 96 1.2.2.2 minoura return (TRUE); 97 1.2.2.2 minoura 98 1.2.2.2 minoura ans = bind(fd, (struct sockaddr *)na->buf, na->len); 99 1.2.2.2 minoura 100 1.2.2.2 minoura close(fd); 101 1.2.2.2 minoura 102 1.2.2.2 minoura return (ans == 0 ? FALSE : TRUE); 103 1.2.2.2 minoura } 104 1.2.2.2 minoura 105 1.2.2.2 minoura int 106 1.2.2.2 minoura add_bndlist(struct netconfig *nconf, struct netbuf *baddr) 107 1.2.2.2 minoura { 108 1.2.2.2 minoura struct fdlist *fdl; 109 1.2.2.2 minoura struct netconfig *newnconf; 110 1.2.2.2 minoura 111 1.2.2.2 minoura newnconf = getnetconfigent(nconf->nc_netid); 112 1.2.2.2 minoura if (newnconf == NULL) 113 1.2.2.2 minoura return (-1); 114 1.2.2.2 minoura fdl = (struct fdlist *)malloc((u_int)sizeof (struct fdlist)); 115 1.2.2.2 minoura if (fdl == NULL) { 116 1.2.2.2 minoura freenetconfigent(newnconf); 117 1.2.2.2 minoura syslog(LOG_ERR, "no memory!"); 118 1.2.2.2 minoura return (-1); 119 1.2.2.2 minoura } 120 1.2.2.2 minoura fdl->nconf = newnconf; 121 1.2.2.2 minoura fdl->next = NULL; 122 1.2.2.2 minoura if (fdhead == NULL) { 123 1.2.2.2 minoura fdhead = fdl; 124 1.2.2.2 minoura fdtail = fdl; 125 1.2.2.2 minoura } else { 126 1.2.2.2 minoura fdtail->next = fdl; 127 1.2.2.2 minoura fdtail = fdl; 128 1.2.2.2 minoura } 129 1.2.2.2 minoura /* XXX no bound checking for now */ 130 1.2.2.2 minoura fdl->check_binding = FALSE; 131 1.2.2.2 minoura 132 1.2.2.2 minoura return 0; 133 1.2.2.2 minoura } 134 1.2.2.2 minoura 135 1.2.2.2 minoura bool_t 136 1.2.2.2 minoura is_bound(char *netid, char *uaddr) 137 1.2.2.2 minoura { 138 1.2.2.2 minoura struct fdlist *fdl; 139 1.2.2.2 minoura 140 1.2.2.2 minoura for (fdl = fdhead; fdl; fdl = fdl->next) 141 1.2.2.2 minoura if (strcmp(fdl->nconf->nc_netid, netid) == 0) 142 1.2.2.2 minoura break; 143 1.2.2.2 minoura if (fdl == NULL) 144 1.2.2.2 minoura return (TRUE); 145 1.2.2.2 minoura return (check_bound(fdl, uaddr)); 146 1.2.2.2 minoura } 147 1.2.2.2 minoura 148 1.2.2.2 minoura /* 149 1.2.2.2 minoura * Returns NULL if there was some system error. 150 1.2.2.2 minoura * Returns "" if the address was not bound, i.e the server crashed. 151 1.2.2.2 minoura * Returns the merged address otherwise. 152 1.2.2.2 minoura */ 153 1.2.2.2 minoura char * 154 1.2.2.2 minoura mergeaddr(SVCXPRT *xprt, char *netid, char *uaddr, char *saddr) 155 1.2.2.2 minoura { 156 1.2.2.2 minoura struct fdlist *fdl; 157 1.2.2.2 minoura char *c_uaddr, *s_uaddr, *m_uaddr; 158 1.2.2.2 minoura 159 1.2.2.2 minoura for (fdl = fdhead; fdl; fdl = fdl->next) 160 1.2.2.2 minoura if (strcmp(fdl->nconf->nc_netid, netid) == 0) 161 1.2.2.2 minoura break; 162 1.2.2.2 minoura if (fdl == NULL) 163 1.2.2.2 minoura return (NULL); 164 1.2.2.2 minoura if (check_bound(fdl, uaddr) == FALSE) 165 1.2.2.2 minoura /* that server died */ 166 1.2.2.2 minoura return (nullstring); 167 1.2.2.2 minoura /* 168 1.2.2.2 minoura * If saddr is not NULL, the remote client may have included the 169 1.2.2.2 minoura * address by which it contacted us. Use that for the "client" uaddr, 170 1.2.2.2 minoura * otherwise use the info from the SVCXPRT. 171 1.2.2.2 minoura */ 172 1.2.2.2 minoura if (saddr != NULL) { 173 1.2.2.2 minoura c_uaddr = saddr; 174 1.2.2.2 minoura } else { 175 1.2.2.2 minoura c_uaddr = taddr2uaddr(fdl->nconf, svc_getrpccaller(xprt)); 176 1.2.2.2 minoura if (c_uaddr == NULL) { 177 1.2.2.2 minoura syslog(LOG_ERR, "taddr2uaddr failed for %s", 178 1.2.2.2 minoura fdl->nconf->nc_netid); 179 1.2.2.2 minoura return (NULL); 180 1.2.2.2 minoura } 181 1.2.2.2 minoura } 182 1.2.2.2 minoura 183 1.2.2.2 minoura #ifdef ND_DEBUG 184 1.2.2.2 minoura if (debugging) { 185 1.2.2.2 minoura if (saddr == NULL) { 186 1.2.2.2 minoura fprintf(stderr, "mergeaddr: client uaddr = %s\n", 187 1.2.2.2 minoura c_uaddr); 188 1.2.2.2 minoura } else { 189 1.2.2.2 minoura fprintf(stderr, "mergeaddr: contact uaddr = %s\n", 190 1.2.2.2 minoura c_uaddr); 191 1.2.2.2 minoura } 192 1.2.2.2 minoura } 193 1.2.2.2 minoura #endif 194 1.2.2.2 minoura s_uaddr = uaddr; 195 1.2.2.2 minoura /* 196 1.2.2.2 minoura * This is all we should need for IP 4 and 6 197 1.2.2.2 minoura */ 198 1.2.2.2 minoura m_uaddr = addrmerge(svc_getrpccaller(xprt), s_uaddr, c_uaddr, netid); 199 1.2.2.2 minoura #ifdef ND_DEBUG 200 1.2.2.2 minoura if (debugging) 201 1.2.2.2 minoura fprintf(stderr, "mergeaddr: uaddr = %s, merged uaddr = %s\n", 202 1.2.2.2 minoura uaddr, m_uaddr); 203 1.2.2.2 minoura #endif 204 1.2.2.2 minoura return (m_uaddr); 205 1.2.2.2 minoura } 206 1.2.2.2 minoura 207 1.2.2.2 minoura /* 208 1.2.2.2 minoura * Returns a netconf structure from its internal list. This 209 1.2.2.2 minoura * structure should not be freed. 210 1.2.2.2 minoura */ 211 1.2.2.2 minoura struct netconfig * 212 1.2.2.2 minoura rpcbind_get_conf(char *netid) 213 1.2.2.2 minoura { 214 1.2.2.2 minoura struct fdlist *fdl; 215 1.2.2.2 minoura 216 1.2.2.2 minoura for (fdl = fdhead; fdl; fdl = fdl->next) 217 1.2.2.2 minoura if (strcmp(fdl->nconf->nc_netid, netid) == 0) 218 1.2.2.2 minoura break; 219 1.2.2.2 minoura if (fdl == NULL) 220 1.2.2.2 minoura return (NULL); 221 1.2.2.2 minoura return (fdl->nconf); 222 1.2.2.2 minoura } 223
Indexes created Fri Oct 03 02:09:57 GMT 2025