| File: | src/usr.sbin/sasyncd/sasyncd.c |
| Warning: | line 178, column 2 Value stored to 'argv' is never read |
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| 1 | /* $OpenBSD: sasyncd.c,v 1.28 2018/04/10 15:58:21 cheloha Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2005 Håkan Olsson. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * |
| 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 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * This code was written under funding by Multicom Security AB. |
| 30 | */ |
| 31 | |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | |
| 35 | #include <errno(*__errno()).h> |
| 36 | #include <fcntl.h> |
| 37 | #include <pwd.h> |
| 38 | #include <signal.h> |
| 39 | #include <stdio.h> |
| 40 | #include <string.h> |
| 41 | #include <stdlib.h> |
| 42 | #include <time.h> |
| 43 | #include <unistd.h> |
| 44 | |
| 45 | #include "sasyncd.h" |
| 46 | |
| 47 | volatile sig_atomic_t daemon_shutdown = 0; |
| 48 | |
| 49 | /* Called by signal handler for controlled daemon shutdown. */ |
| 50 | static void |
| 51 | sasyncd_stop(int s) |
| 52 | { |
| 53 | daemon_shutdown++; |
| 54 | } |
| 55 | |
| 56 | static int |
| 57 | sasyncd_run(pid_t ppid) |
| 58 | { |
| 59 | struct timespec *timeout, ts; |
| 60 | fd_set *rfds, *wfds; |
| 61 | size_t fdsetsize; |
| 62 | int maxfd, n; |
| 63 | |
| 64 | n = getdtablesize(); |
| 65 | fdsetsize = howmany(n, NFDBITS)(((n) + ((((unsigned)(sizeof(__fd_mask) * 8))) - 1)) / (((unsigned )(sizeof(__fd_mask) * 8)))) * sizeof(fd_mask__fd_mask); |
| 66 | |
| 67 | rfds = malloc(fdsetsize); |
| 68 | if (!rfds) { |
| 69 | log_err("malloc(%lu) failed", (unsigned long)fdsetsize); |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | wfds = malloc(fdsetsize); |
| 74 | if (!wfds) { |
| 75 | log_err("malloc(%lu) failed", (unsigned long)fdsetsize); |
| 76 | free(rfds); |
| 77 | return -1; |
| 78 | } |
| 79 | |
| 80 | control_setrun(); |
| 81 | |
| 82 | signal(SIGINT2, sasyncd_stop); |
| 83 | signal(SIGTERM15, sasyncd_stop); |
| 84 | |
| 85 | timer_add("carp_undemote", CARP_DEMOTE_MAXTIME60, |
| 86 | monitor_carpundemote, NULL((void *)0)); |
| 87 | |
| 88 | while (!daemon_shutdown) { |
| 89 | memset(rfds, 0, fdsetsize); |
| 90 | memset(wfds, 0, fdsetsize); |
| 91 | maxfd = net_set_rfds(rfds); |
| 92 | n = net_set_pending_wfds(wfds); |
| 93 | if (n > maxfd) |
| 94 | maxfd = n; |
| 95 | |
| 96 | pfkey_set_rfd(rfds); |
| 97 | pfkey_set_pending_wfd(wfds); |
| 98 | if (cfgstate.pfkey_socket + 1 > maxfd) |
| 99 | maxfd = cfgstate.pfkey_socket + 1; |
| 100 | |
| 101 | carp_set_rfd(rfds); |
| 102 | if (cfgstate.route_socket + 1 > maxfd) |
| 103 | maxfd = cfgstate.route_socket + 1; |
| 104 | |
| 105 | timeout = &ts; |
| 106 | timer_next_event(&ts); |
| 107 | |
| 108 | n = pselect(maxfd, rfds, wfds, NULL((void *)0), timeout, NULL((void *)0)); |
| 109 | if (n == -1) { |
| 110 | if (errno(*__errno()) != EINTR4) { |
| 111 | log_err("select()"); |
| 112 | sleep(1); |
| 113 | } |
| 114 | } else if (n) { |
| 115 | net_handle_messages(rfds); |
| 116 | net_send_messages(wfds); |
| 117 | pfkey_read_message(rfds); |
| 118 | pfkey_send_message(wfds); |
| 119 | carp_read_message(rfds); |
| 120 | } |
| 121 | timer_run(); |
| 122 | |
| 123 | /* Mostly for debugging. */ |
| 124 | if (getppid() != ppid) { |
| 125 | log_msg(0, "sasyncd: parent died"); |
| 126 | daemon_shutdown++; |
| 127 | } |
| 128 | } |
| 129 | free(rfds); |
| 130 | free(wfds); |
| 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | __dead__attribute__((__noreturn__)) static void |
| 135 | usage(void) |
| 136 | { |
| 137 | extern char *__progname; |
| 138 | |
| 139 | fprintf(stderr(&__sF[2]), "usage: %s [-dnv] [-c config-file]\n", __progname); |
| 140 | exit(1); |
| 141 | } |
| 142 | |
| 143 | int |
| 144 | main(int argc, char **argv) |
| 145 | { |
| 146 | extern char *__progname; |
| 147 | char *cfgfile = 0; |
| 148 | int ch, noaction = 0; |
| 149 | |
| 150 | if (geteuid() != 0) { |
| 151 | /* No point in continuing. */ |
| 152 | fprintf(stderr(&__sF[2]), "%s: This daemon needs to be run as root.\n", |
| 153 | __progname); |
| 154 | return 1; |
| 155 | } |
| 156 | |
| 157 | while ((ch = getopt(argc, argv, "c:dnv")) != -1) { |
| 158 | switch (ch) { |
| 159 | case 'c': |
| 160 | if (cfgfile) |
| 161 | usage(); |
| 162 | cfgfile = optarg; |
| 163 | break; |
| 164 | case 'd': |
| 165 | cfgstate.debug++; |
| 166 | break; |
| 167 | case 'n': |
| 168 | noaction = 1; |
| 169 | break; |
| 170 | case 'v': |
| 171 | cfgstate.verboselevel++; |
| 172 | break; |
| 173 | default: |
| 174 | usage(); |
| 175 | } |
| 176 | } |
| 177 | argc -= optind; |
| 178 | argv += optind; |
Value stored to 'argv' is never read | |
| 179 | |
| 180 | if (argc > 0) |
| 181 | usage(); |
| 182 | |
| 183 | log_init(__progname); |
| 184 | timer_init(); |
| 185 | |
| 186 | cfgstate.runstate = INIT; |
| 187 | LIST_INIT(&cfgstate.peerlist)do { ((&cfgstate.peerlist)->lh_first) = ((void *)0); } while (0); |
| 188 | |
| 189 | cfgstate.listen_port = SASYNCD_DEFAULT_PORT500; |
| 190 | cfgstate.flags |= CTL_DEFAULT0x0008; |
| 191 | |
| 192 | if (!cfgfile) |
| 193 | cfgfile = SASYNCD_CFGFILE"/etc/sasyncd.conf"; |
| 194 | |
| 195 | if (conf_parse_file(cfgfile) == 0 ) { |
| 196 | if (!cfgstate.sharedkey) { |
| 197 | fprintf(stderr(&__sF[2]), "config: " |
| 198 | "no shared key specified, cannot continue\n"); |
| 199 | exit(1); |
| 200 | } |
| 201 | if (!cfgstate.carp_ifname || !*cfgstate.carp_ifname) { |
| 202 | fprintf(stderr(&__sF[2]), "config: " |
| 203 | "no carp interface specified, cannot continue\n"); |
| 204 | exit(1); |
| 205 | } |
| 206 | } else { |
| 207 | exit(1); |
| 208 | } |
| 209 | |
| 210 | if (noaction) { |
| 211 | fprintf(stderr(&__sF[2]), "configuration OK\n"); |
| 212 | exit(0); |
| 213 | } |
| 214 | |
| 215 | carp_demote(CARP_INC1, 0); |
| 216 | |
| 217 | if (carp_init()) |
| 218 | return 1; |
| 219 | if (pfkey_init(0)) |
| 220 | return 1; |
| 221 | if (net_init()) |
| 222 | return 1; |
| 223 | |
| 224 | if (!cfgstate.debug) |
| 225 | if (daemon(1, 0)) { |
| 226 | perror("daemon()"); |
| 227 | exit(1); |
| 228 | } |
| 229 | |
| 230 | if (monitor_init()) { |
| 231 | /* Parent, with privileges. */ |
| 232 | monitor_loop(); |
| 233 | exit(0); |
| 234 | } |
| 235 | |
| 236 | /* Child, no privileges left. Run main loop. */ |
| 237 | sasyncd_run(getppid()); |
| 238 | |
| 239 | /* Shutdown. */ |
| 240 | log_msg(0, "shutting down..."); |
| 241 | |
| 242 | net_shutdown(); |
| 243 | pfkey_shutdown(); |
| 244 | return 0; |
| 245 | } |