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-rw-r--r--wol.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/wol.c b/wol.c
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+/* $Id$ */
+/*
+ * Copyright (c) 2009 Dimitri Sokolyuk <sokolyuk@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+char *bcast = "255.255.255.255";
+
+int
+parsemac(char *macaddr, char *str)
+{
+ char *p;
+ int i;
+ long l;
+
+ for (i = 0; i < 6; ++i) {
+ l = strtol(str, &p, 0x10);
+ macaddr[i] = (char)l;
+ str = p + 1;
+ }
+
+ return 0;
+}
+
+void
+usage()
+{
+ extern char *__progname;
+
+ fprintf(stderr, "usage: %s [-n network] mac\n", __progname);
+
+ exit(1);
+}
+
+int
+spit(char *net, char *msg, int len)
+{
+ struct hostent *he;
+ struct sockaddr_in sin;
+ int fd;
+ int optval = 1;
+
+ he = gethostbyname(net);
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin.sin_addr = *((struct in_addr *)he->h_addr);
+ sin.sin_port = htons(7);
+
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &optval, sizeof(optval));
+ sendto(fd, msg, len, 0, (struct sockaddr *)&sin, sizeof(sin));
+ close(fd);
+
+ return 0;
+}
+
+int
+main(int argc, char **argv)
+{
+ char msg[17][6];
+ char macaddr[6];
+ char *net, *mac;
+ int c, i;
+
+ net = bcast;
+ mac = NULL;
+
+ while ((c = getopt(argc, argv, "n:")) != -1)
+ switch (c) {
+ case 'n':
+ net = strdup(optarg);
+ break;
+ default:
+ usage();
+ }
+
+ argc -= optind;
+ argv += optind;
+
+ if (!argc)
+ usage();
+
+ mac = strdup(*argv);
+ parsemac(macaddr, mac);
+
+ memset(msg[0], 0xff, sizeof(msg[0]));
+ for (i = 0; i < 16; ++i)
+ memcpy(msg[i+1], macaddr, sizeof(macaddr));
+
+ spit(net, (char *)msg, sizeof(msg));
+
+ return 0;
+}