Current Path : /compat/linux/proc/self/root/usr/src/usr.sbin/wake/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //compat/linux/proc/self/root/usr/src/usr.sbin/wake/wake.c |
/* * Copyright (C) 2006, 2007, 2008, 2009, 2010 Marc Balmer <marc@msys.ch> * Copyright (C) 2000 Eugene M. Kim. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Author's name may not be used endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/usr.sbin/wake/wake.c 232775 2012-03-10 08:27:37Z jh $"); #include <sys/ioctl.h> #include <sys/socket.h> #include <sys/time.h> #include <net/bpf.h> #include <net/if.h> #include <net/if_dl.h> #include <net/if_types.h> #include <netinet/in.h> #include <netinet/if_ether.h> #include <err.h> #include <fcntl.h> #include <ifaddrs.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #define _PATH_BPF "/dev/bpf" #ifndef SYNC_LEN #define SYNC_LEN 6 #endif #ifndef DESTADDR_COUNT #define DESTADDR_COUNT 16 #endif static int bind_if_to_bpf(char const *ifname, int bpf); static int find_ether(char *dst, size_t len); static int get_ether(char const *text, struct ether_addr *addr); static int send_wakeup(int bpf, struct ether_addr const *addr); static void usage(void); static int wake(int bpf, const char *host); static void usage(void) { (void)fprintf(stderr, "usage: wake [interface] lladdr [lladdr ...]\n"); exit(1); } static int wake(int bpf, const char *host) { struct ether_addr macaddr; if (get_ether(host, &macaddr) == -1) return (-1); return (send_wakeup(bpf, &macaddr)); } static int bind_if_to_bpf(char const *ifname, int bpf) { struct ifreq ifr; u_int dlt; if (strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)) >= sizeof(ifr.ifr_name)) return (-1); if (ioctl(bpf, BIOCSETIF, &ifr) == -1) return (-1); if (ioctl(bpf, BIOCGDLT, &dlt) == -1) return (-1); if (dlt != DLT_EN10MB) return (-1); return (0); } static int find_ether(char *dst, size_t len) { struct ifaddrs *ifap, *ifa; struct sockaddr_dl *sdl = NULL; int nifs; if (dst == NULL || len == 0) return (0); if (getifaddrs(&ifap) != 0) return (-1); /* XXX also check the link state */ for (nifs = 0, ifa = ifap; ifa; ifa = ifa->ifa_next) if (ifa->ifa_addr->sa_family == AF_LINK && ifa->ifa_flags & IFF_UP && ifa->ifa_flags & IFF_RUNNING) { sdl = (struct sockaddr_dl *)ifa->ifa_addr; if (sdl->sdl_type == IFT_ETHER) { strlcpy(dst, ifa->ifa_name, len); nifs++; } } freeifaddrs(ifap); return (nifs == 1 ? 0 : -1); } static int get_ether(char const *text, struct ether_addr *addr) { struct ether_addr *paddr; paddr = ether_aton(text); if (paddr != NULL) { *addr = *paddr; return (0); } if (ether_hostton(text, addr)) { warnx("no match for host %s found", text); return (-1); } return (0); } static int send_wakeup(int bpf, struct ether_addr const *addr) { struct { struct ether_header hdr; u_char data[SYNC_LEN + ETHER_ADDR_LEN * DESTADDR_COUNT]; } __packed pkt; u_char *p; ssize_t bw; ssize_t len; int i; (void)memset(pkt.hdr.ether_dhost, 0xff, sizeof(pkt.hdr.ether_dhost)); pkt.hdr.ether_type = htons(0); (void)memset(pkt.data, 0xff, SYNC_LEN); for (p = pkt.data + SYNC_LEN, i = 0; i < DESTADDR_COUNT; p += ETHER_ADDR_LEN, i++) bcopy(addr->octet, p, ETHER_ADDR_LEN); p = (u_char *)&pkt; len = sizeof(pkt); bw = 0; while (len) { if ((bw = write(bpf, p, len)) == -1) { warn("write()"); return (-1); } len -= bw; p += bw; } return (0); } int main(int argc, char *argv[]) { int bpf, n, rval; char ifname[IF_NAMESIZE]; if (argc < 2) usage(); if ((bpf = open(_PATH_BPF, O_RDWR)) == -1) err(1, "Cannot open bpf interface"); n = 2; if (bind_if_to_bpf(argv[1], bpf) == -1) { if (find_ether(ifname, sizeof(ifname))) err(1, "Failed to determine ethernet interface"); if (bind_if_to_bpf(ifname, bpf) == -1) err(1, "Cannot bind to interface `%s'", ifname); --n; } else strlcpy(ifname, argv[1], sizeof(ifname)); if (n >= argc) usage(); rval = 0; for (; n < argc; n++) { if (wake(bpf, argv[n]) != 0) { rval = 1; warn("Cannot send Wake on LAN frame over `%s' to `%s'", ifname, argv[n]); } } exit(rval); }