1 /* $OpenBSD: lockd.c,v 1.16 2023/03/08 04:43:15 guenther Exp $ */
2
3 /*
4 * Copyright (c) 1995
5 * A.R. Gordon (andrew.gordon@net-tel.co.uk). All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the FreeBSD project
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY ANDREW GORDON AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 */
35
36 #include <sys/socket.h>
37 #include <netinet/in.h>
38 #include <rpc/rpc.h>
39 #include <rpc/pmap_clnt.h>
40 #include <rpcsvc/sm_inter.h>
41 #include "nlm_prot.h"
42 #include <arpa/inet.h>
43 #include <stdio.h>
44 #include <syslog.h>
45 #include <stdlib.h>
46 #include <err.h>
47 #include <errno.h>
48 #include <signal.h>
49 #include <limits.h>
50 #include <string.h>
51 #include <unistd.h>
52 #include <netdb.h>
53
54 #include "lockd.h"
55
56 int debug_level = 0; /* 0 = no debugging syslog() calls */
57 int _rpcsvcdirty = 0;
58 int grace_expired;
59
60 void nlm_prog_0(struct svc_req *, SVCXPRT *);
61 void nlm_prog_1(struct svc_req *, SVCXPRT *);
62 void nlm_prog_3(struct svc_req *, SVCXPRT *);
63 void nlm_prog_4(struct svc_req *, SVCXPRT *);
64
65 static void sigalarm_handler(int);
66 static void usage(void);
67
68 int
main(int argc,char * argv[])69 main(int argc, char *argv[])
70 {
71 SVCXPRT *transp;
72 const char *errstr;
73 int ch;
74 struct sigaction sigchild, sigalarm;
75 int grace_period = 30;
76
77 while ((ch = getopt(argc, argv, "d:g:")) != (-1)) {
78 switch (ch) {
79 case 'd':
80 debug_level = strtonum(optarg, 1, INT_MAX, &errstr);
81 if (errstr) {
82 usage();
83 /* NOTREACHED */
84 }
85 break;
86 case 'g':
87 grace_period = strtonum(optarg, 1, INT_MAX, &errstr);
88 if (errstr) {
89 usage();
90 /* NOTREACHED */
91 }
92 break;
93 default:
94 usage();
95 /* NOTREACHED */
96 }
97 }
98
99 (void) pmap_unset(NLM_PROG, NLM_SM);
100 (void) pmap_unset(NLM_PROG, NLM_VERS);
101 (void) pmap_unset(NLM_PROG, NLM_VERSX);
102 (void) pmap_unset(NLM_PROG, NLM_VERS4);
103
104 transp = svcudp_create(RPC_ANYSOCK);
105 if (transp == NULL) {
106 fprintf(stderr, "cannot create udp service.\n");
107 exit(1);
108 }
109 if (!svc_register(transp, NLM_PROG, NLM_SM,
110 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_0, IPPROTO_UDP)) {
111 fprintf(stderr, "unable to register (NLM_PROG, NLM_SM, udp).\n");
112 exit(1);
113 }
114 if (!svc_register(transp, NLM_PROG, NLM_VERS,
115 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_1, IPPROTO_UDP)) {
116 fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS, udp).\n");
117 exit(1);
118 }
119 if (!svc_register(transp, NLM_PROG, NLM_VERSX,
120 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_3, IPPROTO_UDP)) {
121 fprintf(stderr, "unable to register (NLM_PROG, NLM_VERSX, udp).\n");
122 exit(1);
123 }
124 if (!svc_register(transp, NLM_PROG, NLM_VERS4,
125 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_4, IPPROTO_UDP)) {
126 fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS4, udp).\n");
127 exit(1);
128 }
129 transp = svctcp_create(RPC_ANYSOCK, 0, 0);
130 if (transp == NULL) {
131 fprintf(stderr, "cannot create tcp service.\n");
132 exit(1);
133 }
134 if (!svc_register(transp, NLM_PROG, NLM_VERS,
135 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_1, IPPROTO_TCP)) {
136 fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS, tcp).\n");
137 exit(1);
138 }
139 if (!svc_register(transp, NLM_PROG, NLM_VERSX,
140 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_3, IPPROTO_TCP)) {
141 fprintf(stderr, "unable to register (NLM_PROG, NLM_VERSX, tcp).\n");
142 exit(1);
143 }
144 if (!svc_register(transp, NLM_PROG, NLM_VERS4,
145 (void (*) (struct svc_req *, SVCXPRT *)) nlm_prog_4, IPPROTO_TCP)) {
146 fprintf(stderr, "unable to register (NLM_PROG, NLM_VERS4, tcp).\n");
147 exit(1);
148 }
149
150 /*
151 * Note that it is NOT sensible to run this program from inetd - the
152 * protocol assumes that it will run immediately at boot time.
153 */
154 if (daemon(0, 0) == -1) {
155 err(1, "cannot fork");
156 /* NOTREACHED */
157 }
158
159 openlog("rpc.lockd", 0, LOG_DAEMON);
160 if (debug_level)
161 syslog(LOG_INFO, "Starting, debug level %d", debug_level);
162 else
163 syslog(LOG_INFO, "Starting");
164
165 sigchild.sa_handler = sigchild_handler;
166 sigemptyset(&sigchild.sa_mask);
167 sigchild.sa_flags = SA_RESTART;
168 if (sigaction(SIGCHLD, &sigchild, NULL) != 0) {
169 syslog(LOG_WARNING, "sigaction(SIGCHLD) failed (%m)");
170 exit(1);
171 }
172 sigalarm.sa_handler = sigalarm_handler;
173 sigemptyset(&sigalarm.sa_mask);
174 sigalarm.sa_flags = SA_RESETHAND; /* should only happen once */
175 sigalarm.sa_flags |= SA_RESTART;
176 if (sigaction(SIGALRM, &sigalarm, NULL) != 0) {
177 syslog(LOG_WARNING, "sigaction(SIGALRM) failed (%m)");
178 exit(1);
179 }
180 grace_expired = 0;
181 if (alarm(10) == (unsigned int)-1) {
182 syslog(LOG_WARNING, "alarm failed (%m)");
183 exit(1);
184 }
185
186 svc_run(); /* Should never return */
187 return 1;
188 }
189
190 static void
sigalarm_handler(int s)191 sigalarm_handler(int s)
192 {
193 grace_expired = 1;
194 }
195
196 static void
usage()197 usage()
198 {
199 errx(1, "usage: rpc.lockd [-d [debug_level]] [-g grace_period]");
200 }
201