fb79a2e2cf
function old new delta do_iptunnel 203 977 +774 process_dev 5328 5494 +166 ioctl_or_perror - 54 +54 ioctl_or_perror_and_die - 51 +51 ioctl_alt_func - 49 +49 bb_ioctl_or_warn - 47 +47 do_add_ioctl 102 145 +43 bb_xioctl - 39 +39 print_value_on_off - 31 +31 get_lcm 105 123 +18 arp_main 2155 2167 +12 .................. zcip_main 1576 1566 -10 setlogcons_main 92 82 -10 dumpkmap_main 263 253 -10 do_get_ioctl 85 75 -10 setkeycodes_main 165 154 -11 write_table 244 232 -12 vconfig_main 318 306 -12 do_del_ioctl 93 81 -12 set_address 75 62 -13 maybe_set_utc 30 16 -14 loadfont_main 495 479 -16 slattach_main 712 695 -17 do_loadfont 191 174 -17 do_iplink 1155 1136 -19 getty_main 2583 2562 -21 fbset_main 2058 2035 -23 do_time 588 565 -23 xioctl 25 - -25 read_rtc 186 160 -26 parse_conf 1299 1270 -29 udhcp_read_interface 269 239 -30 bb_ioctl 45 - -45 bb_ioctl_alt 70 - -70 bb_ioctl_on_off 78 - -78 .rodata 129370 129018 -352 do_show 799 - -799 ------------------------------------------------------------------------------ (add/remove: 6/5 grow/shrink: 13/49 up/down: 1316/-1864) Total: -548 bytes text data bss dec hex filename 675352 2740 13968 692060 a8f5c busybox_old 674804 2740 13968 691512 a8d38 busybox_unstripped
126 lines
3.1 KiB
C
126 lines
3.1 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* socket.c -- DHCP server client/server socket creation
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*
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* udhcp client/server
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* Copyright (C) 1999 Matthew Ramsay <matthewr@moreton.com.au>
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* Chris Trew <ctrew@moreton.com.au>
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*
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* Rewrite by Russ Dill <Russ.Dill@asu.edu> July 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <net/if.h>
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#include <features.h>
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#if (defined(__GLIBC__) && __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 1) || defined _NEWLIB_VERSION
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#include <netpacket/packet.h>
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#include <net/ethernet.h>
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#else
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#include <asm/types.h>
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#include <linux/if_packet.h>
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#include <linux/if_ether.h>
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#endif
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#include "common.h"
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int read_interface(const char *interface, int *ifindex, uint32_t *addr, uint8_t *arp)
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{
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int fd;
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struct ifreq ifr;
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struct sockaddr_in *our_ip;
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memset(&ifr, 0, sizeof(ifr));
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fd = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
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if (fd < 0) {
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bb_perror_msg("socket failed");
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return -1;
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}
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ifr.ifr_addr.sa_family = AF_INET;
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strncpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
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if (addr) {
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if (ioctl_or_perror(fd, SIOCGIFADDR, &ifr,
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"is interface %s up and configured?", interface)
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) {
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close(fd);
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return -1;
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}
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our_ip = (struct sockaddr_in *) &ifr.ifr_addr;
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*addr = our_ip->sin_addr.s_addr;
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DEBUG("%s (our ip) = %s", ifr.ifr_name, inet_ntoa(our_ip->sin_addr));
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}
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if (ifindex) {
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if (ioctl_or_warn(fd, SIOCGIFINDEX, &ifr) != 0) {
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close(fd);
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return -1;
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}
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DEBUG("adapter index %d", ifr.ifr_ifindex);
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*ifindex = ifr.ifr_ifindex;
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}
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if (arp) {
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if (ioctl_or_warn(fd, SIOCGIFHWADDR, &ifr) != 0) {
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close(fd);
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return -1;
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}
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memcpy(arp, ifr.ifr_hwaddr.sa_data, 6);
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DEBUG("adapter hardware address %02x:%02x:%02x:%02x:%02x:%02x",
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arp[0], arp[1], arp[2], arp[3], arp[4], arp[5]);
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}
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return 0;
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}
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int listen_socket(uint32_t ip, int port, const char *inf)
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{
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struct ifreq interface;
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int fd;
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struct sockaddr_in addr;
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DEBUG("Opening listen socket on 0x%08x:%d %s", ip, port, inf);
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fd = xsocket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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addr.sin_addr.s_addr = ip;
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if (setsockopt_reuseaddr(fd) == -1) {
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close(fd);
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return -1;
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}
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if (setsockopt_broadcast(fd) == -1) {
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close(fd);
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return -1;
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}
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strncpy(interface.ifr_name, inf, IFNAMSIZ);
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if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &interface, sizeof(interface)) < 0) {
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close(fd);
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return -1;
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}
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if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) {
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close(fd);
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return -1;
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}
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return fd;
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}
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