X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=networking%2Fether-wake.c;h=c38547dda422b412eba7866bebfaa888bfec3c05;hb=2db782bc7be70c34a756e2bc6d4a53e8f47bab20;hp=ed41590aa28d32c26b991272cc8fd36de427c960;hpb=517d1aac7f42958a2b1c3c1f7ffbf83731c6e263;p=oweals%2Fbusybox.git diff --git a/networking/ether-wake.c b/networking/ether-wake.c index ed41590aa..c38547dda 100644 --- a/networking/ether-wake.c +++ b/networking/ether-wake.c @@ -2,7 +2,7 @@ /* * ether-wake.c - Send a magic packet to wake up sleeping machines. * - * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. * * Author: Donald Becker, http://www.scyld.com/"; http://www.scyld.com/wakeonlan.html * Busybox port: Christian Volkmann @@ -49,9 +49,9 @@ * Copyright 1999-2003 Donald Becker and Scyld Computing Corporation. * * The author may be reached as becker@scyld, or C/O - * Scyld Computing Corporation - * 914 Bay Ridge Road, Suite 220 - * Annapolis MD 21403 + * Scyld Computing Corporation + * 914 Bay Ridge Road, Suite 220 + * Annapolis MD 21403 * * Notes: * On some systems dropping root capability allows the process to be @@ -62,16 +62,23 @@ * An alternative to needing 'root' is using a UDP broadcast socket, however * doing so only works with adapters configured for unicast+broadcast Rx * filter. That configuration consumes more power. -*/ - + */ +//usage:#define ether_wake_trivial_usage +//usage: "[-b] [-i IFACE] [-p aa:bb:cc:dd[:ee:ff]/a.b.c.d] MAC" +//usage:#define ether_wake_full_usage "\n\n" +//usage: "Send a magic packet to wake up sleeping machines.\n" +//usage: "MAC must be a station address (00:11:22:33:44:55) or\n" +//usage: "a hostname with a known 'ethers' entry.\n" +//usage: "\n -b Broadcast the packet" +//usage: "\n -i IFACE Interface to use (default eth0)" +//usage: "\n -p PASSWORD Append four or six byte PASSWORD to the packet" + +#include "libbb.h" #include -#include #include #include -#include "busybox.h" - /* Note: PF_INET, SOCK_DGRAM, IPPROTO_UDP would allow SIOCGIFHWADDR to * work as non-root, but we need SOCK_PACKET to specify the Ethernet * destination address. @@ -92,7 +99,7 @@ void bb_debug_dump_packet(unsigned char *outpack, int pktsize) printf("packet dump:\n"); for (i = 0; i < pktsize; ++i) { printf("%2.2x ", outpack[i]); - if (i % 20 == 19) puts(""); + if (i % 20 == 19) bb_putchar('\n'); } printf("\n\n"); } @@ -106,24 +113,25 @@ void bb_debug_dump_packet(unsigned char *outpack, int pktsize) * Host name * IP address string * MAC address string -*/ + */ static void get_dest_addr(const char *hostid, struct ether_addr *eaddr) { struct ether_addr *eap; - eap = ether_aton(hostid); + eap = ether_aton_r(hostid, eaddr); if (eap) { - *eaddr = *eap; - bb_debug_msg("The target station address is %s\n\n", ether_ntoa(eaddr)); -#if !defined(__UCLIBC__) + bb_debug_msg("The target station address is %s\n\n", ether_ntoa(eap)); +#if !defined(__UCLIBC__) || UCLIBC_VERSION >= KERNEL_VERSION(0, 9, 30) } else if (ether_hostton(hostid, eaddr) == 0) { bb_debug_msg("Station address for hostname %s is %s\n\n", hostid, ether_ntoa(eaddr)); #endif - } else + } else { bb_show_usage(); + } } -static int get_fill(unsigned char *pkt, struct ether_addr *eaddr, int broadcast) +#define PKT_HEADER_SIZE (20 + 16*6) +static int fill_pkt_header(unsigned char *pkt, struct ether_addr *eaddr, int broadcast) { int i; unsigned char *station_addr = eaddr->ether_addr_octet; @@ -146,7 +154,7 @@ static int get_fill(unsigned char *pkt, struct ether_addr *eaddr, int broadcast) memcpy(pkt, station_addr, 6); /* 20,26,32,... */ } - return 20 + 16*6; /* length of packet */ + return PKT_HEADER_SIZE; /* length of packet */ } static int get_wol_pw(const char *ethoptarg, unsigned char *wol_passwd) @@ -164,7 +172,7 @@ static int get_wol_pw(const char *ethoptarg, unsigned char *wol_passwd) byte_cnt = sscanf(ethoptarg, "%u.%u.%u.%u", &passwd[0], &passwd[1], &passwd[2], &passwd[3]); if (byte_cnt < 4) { - bb_error_msg("cannot read Wake-On-LAN pass"); + bb_error_msg("can't read Wake-On-LAN pass"); return 0; } // TODO: check invalid numbers >255?? @@ -178,24 +186,24 @@ static int get_wol_pw(const char *ethoptarg, unsigned char *wol_passwd) return byte_cnt; } -int ether_wake_main(int argc, char **argv); -int ether_wake_main(int argc, char **argv) +int ether_wake_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int ether_wake_main(int argc UNUSED_PARAM, char **argv) { const char *ifname = "eth0"; char *pass; unsigned flags; unsigned char wol_passwd[6]; int wol_passwd_sz = 0; - int s; /* Raw socket */ + int s; /* Raw socket */ int pktsize; - unsigned char outpack[1000]; + unsigned char outpack[PKT_HEADER_SIZE + 6 /* max passwd size */ + 16 /* paranoia */]; struct ether_addr eaddr; - struct whereto_t whereto; /* who to wake up */ + struct whereto_t whereto; /* who to wake up */ /* handle misc user options */ opt_complementary = "=1"; - flags = getopt32(argc, argv, "bi:p:", &ifname, &pass); + flags = getopt32(argv, "bi:p:", &ifname, &pass); if (flags & 4) /* -p */ wol_passwd_sz = get_wol_pw(pass, wol_passwd); flags &= 1; /* we further interested only in -b [bcast] flag */ @@ -210,7 +218,7 @@ int ether_wake_main(int argc, char **argv) get_dest_addr(argv[optind], &eaddr); /* fill out the header of the packet */ - pktsize = get_fill(outpack, &eaddr, flags /* & 1 OPT_BROADCAST */); + pktsize = fill_pkt_header(outpack, &eaddr, flags /* & 1 OPT_BROADCAST */); bb_debug_dump_packet(outpack, pktsize); @@ -219,9 +227,8 @@ int ether_wake_main(int argc, char **argv) { struct ifreq if_hwaddr; - strncpy(if_hwaddr.ifr_name, ifname, sizeof(if_hwaddr.ifr_name)); - if (ioctl(s, SIOCGIFHWADDR, &if_hwaddr) != 0) - bb_perror_msg_and_die("SIOCGIFHWADDR on %s failed", ifname); + strncpy_IFNAMSIZ(if_hwaddr.ifr_name, ifname); + ioctl_or_perror_and_die(s, SIOCGIFHWADDR, &if_hwaddr, "SIOCGIFHWADDR on %s failed", ifname); memcpy(outpack+6, if_hwaddr.ifr_hwaddr.sa_data, 6); @@ -229,9 +236,9 @@ int ether_wake_main(int argc, char **argv) { unsigned char *hwaddr = if_hwaddr.ifr_hwaddr.sa_data; printf("The hardware address (SIOCGIFHWADDR) of %s is type %d " - "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n\n", ifname, - if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1], - hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]); + "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n\n", ifname, + if_hwaddr.ifr_hwaddr.sa_family, hwaddr[0], hwaddr[1], + hwaddr[2], hwaddr[3], hwaddr[4], hwaddr[5]); } # endif } @@ -256,9 +263,8 @@ int ether_wake_main(int argc, char **argv) #if defined(PF_PACKET) { struct ifreq ifr; - strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); - if (ioctl(s, SIOCGIFINDEX, &ifr) != 0) - bb_perror_msg_and_die("SIOCGIFINDEX"); + strncpy_IFNAMSIZ(ifr.ifr_name, ifname); + xioctl(s, SIOCGIFINDEX, &ifr); memset(&whereto, 0, sizeof(whereto)); whereto.sll_family = AF_PACKET; whereto.sll_ifindex = ifr.ifr_ifindex;