1 /* $NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $ */ 2 /* $FreeBSD$ */ 3 4 /* 5 * Copyright (c) 1995 6 * A.R. Gordon (andrew.gordon@net-tel.co.uk). 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 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed for the FreeBSD project 19 * 4. Neither the name of the author nor the names of any co-contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 */ 36 37 #include <sys/cdefs.h> 38 #ifndef lint 39 __RCSID("$NetBSD: lockd.c,v 1.7 2000/08/12 18:08:44 thorpej Exp $"); 40 #endif 41 42 /* 43 * main() function for NFS lock daemon. Most of the code in this 44 * file was generated by running rpcgen /usr/include/rpcsvc/nlm_prot.x. 45 * 46 * The actual program logic is in the file lock_proc.c 47 */ 48 49 #include <sys/types.h> 50 #include <sys/socket.h> 51 52 #include <err.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <errno.h> 56 #include <syslog.h> 57 #include <signal.h> 58 #include <string.h> 59 #include <unistd.h> 60 #include <libutil.h> 61 #include <netconfig.h> 62 63 #include <rpc/rpc.h> 64 #include <rpcsvc/sm_inter.h> 65 66 #include "lockd.h" 67 #include <rpcsvc/nlm_prot.h> 68 69 int debug_level = 0; /* 0 = no debugging syslog() calls */ 70 int _rpcsvcdirty = 0; 71 72 int grace_expired; 73 int nsm_state; 74 pid_t client_pid; 75 struct mon mon_host; 76 77 void init_nsm(void); 78 int main __P((int, char **)); 79 void nlm_prog_0 __P((struct svc_req *, SVCXPRT *)); 80 void nlm_prog_1 __P((struct svc_req *, SVCXPRT *)); 81 void nlm_prog_3 __P((struct svc_req *, SVCXPRT *)); 82 void nlm_prog_4 __P((struct svc_req *, SVCXPRT *)); 83 void usage __P((void)); 84 85 void sigalarm_handler __P((void)); 86 87 const char *transports[] = { "udp", "tcp", "udp6", "tcp6" }; 88 89 int 90 main(argc, argv) 91 int argc; 92 char **argv; 93 { 94 SVCXPRT *transp; 95 int ch, i, maxindex, s; 96 struct sigaction sigalarm; 97 int grace_period = 30; 98 struct netconfig *nconf; 99 100 while ((ch = getopt(argc, argv, "d:g:")) != (-1)) { 101 switch (ch) { 102 case 'd': 103 debug_level = atoi(optarg); 104 if (!debug_level) { 105 usage(); 106 /* NOTREACHED */ 107 } 108 break; 109 case 'g': 110 grace_period = atoi(optarg); 111 if (!grace_period) { 112 usage(); 113 /* NOTREACHED */ 114 } 115 break; 116 default: 117 case '?': 118 usage(); 119 /* NOTREACHED */ 120 } 121 } 122 if (geteuid()) { /* This command allowed only to root */ 123 fprintf(stderr, "Sorry. You are not superuser\n"); 124 exit(1); 125 } 126 127 (void)rpcb_unset(NLM_PROG, NLM_SM, NULL); 128 (void)rpcb_unset(NLM_PROG, NLM_VERS, NULL); 129 (void)rpcb_unset(NLM_PROG, NLM_VERSX, NULL); 130 (void)rpcb_unset(NLM_PROG, NLM_VERS4, NULL); 131 132 /* 133 * Check if IPv6 support is present. 134 */ 135 s = socket(AF_INET6, SOCK_DGRAM, IPPROTO_UDP); 136 if (s < 0) 137 maxindex = 2; 138 else { 139 close(s); 140 maxindex = 4; 141 } 142 143 for (i = 0; i < maxindex; i++) { 144 nconf = getnetconfigent(transports[i]); 145 if (nconf == NULL) 146 errx(1, "cannot get udp netconf."); 147 148 transp = svc_tli_create(RPC_ANYFD, nconf, NULL, 0, 0); 149 if (transp == NULL) { 150 errx(1, "cannot create %s service.", transports[i]); 151 /* NOTREACHED */ 152 } 153 if (!svc_reg(transp, NLM_PROG, NLM_SM, nlm_prog_0, nconf)) { 154 errx(1, "unable to register (NLM_PROG, NLM_SM, %s)", 155 transports[i]); 156 /* NOTREACHED */ 157 } 158 if (!svc_reg(transp, NLM_PROG, NLM_VERS, nlm_prog_1, nconf)) { 159 errx(1, "unable to register (NLM_PROG, NLM_VERS, %s)", 160 transports[i]); 161 /* NOTREACHED */ 162 } 163 if (!svc_reg(transp, NLM_PROG, NLM_VERSX, nlm_prog_3, nconf)) { 164 errx(1, "unable to register (NLM_PROG, NLM_VERSX, %s)", 165 transports[i]); 166 /* NOTREACHED */ 167 } 168 if (!svc_reg(transp, NLM_PROG, NLM_VERS4, nlm_prog_4, nconf)) { 169 errx(1, "unable to register (NLM_PROG, NLM_VERS4, %s)", 170 transports[i]); 171 /* NOTREACHED */ 172 } 173 freenetconfigent(nconf); 174 } 175 176 /* 177 * Note that it is NOT sensible to run this program from inetd - the 178 * protocol assumes that it will run immediately at boot time. 179 */ 180 if (daemon(0, 0)) { 181 err(1, "cannot fork"); 182 /* NOTREACHED */ 183 } 184 185 openlog("rpc.lockd", 0, LOG_DAEMON); 186 if (debug_level) 187 syslog(LOG_INFO, "Starting, debug level %d", debug_level); 188 else 189 syslog(LOG_INFO, "Starting"); 190 191 sigalarm.sa_handler = (sig_t) sigalarm_handler; 192 sigemptyset(&sigalarm.sa_mask); 193 sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */ 194 sigalarm.sa_flags |= SA_RESTART; 195 if (sigaction(SIGALRM, &sigalarm, NULL) != 0) { 196 syslog(LOG_WARNING, "sigaction(SIGALRM) failed: %s", 197 strerror(errno)); 198 exit(1); 199 } 200 grace_expired = 0; 201 alarm(10); 202 203 init_nsm(); 204 205 client_pid = client_request(); 206 207 svc_run(); /* Should never return */ 208 exit(1); 209 } 210 211 void 212 sigalarm_handler(void) 213 { 214 215 grace_expired = 1; 216 } 217 218 void 219 usage() 220 { 221 errx(1, "usage: rpc.lockd [-d <debuglevel>] [-g <grace period>]"); 222 } 223 224 /* 225 * init_nsm -- 226 * Reset the NSM state-of-the-world and acquire its state. 227 */ 228 void 229 init_nsm(void) 230 { 231 enum clnt_stat ret; 232 my_id id; 233 sm_stat stat; 234 235 /* 236 * !!! 237 * The my_id structure isn't used by the SM_UNMON_ALL call, as far 238 * as I know. Leave it empty for now. 239 */ 240 memset(&id, 0, sizeof(id)); 241 id.my_name = "NFS NLM"; 242 243 /* 244 * !!! 245 * The statd program must already be registered when lockd runs. 246 */ 247 do { 248 ret = callrpc("localhost", SM_PROG, SM_VERS, SM_UNMON_ALL, 249 xdr_my_id, &id, xdr_sm_stat, &stat); 250 if (ret == RPC_PROGUNAVAIL) { 251 warnx("%lu %s", SM_PROG, clnt_sperrno(ret)); 252 sleep(2); 253 continue; 254 } 255 break; 256 } while (0); 257 258 if (ret != 0) { 259 errx(1, "%lu %s", SM_PROG, clnt_sperrno(ret)); 260 } 261 262 nsm_state = stat.state; 263 264 /* setup constant data for SM_MON calls */ 265 mon_host.mon_id.my_id.my_name = "localhost"; 266 mon_host.mon_id.my_id.my_prog = NLM_PROG; 267 mon_host.mon_id.my_id.my_vers = NLM_SM; 268 mon_host.mon_id.my_id.my_proc = NLM_SM_NOTIFY; /* bsdi addition */ 269 } 270