mirror of
https://github.com/netfun2000/lcd4linux.git
synced 2026-02-27 09:44:34 +08:00
69fecdd3d6
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@1079 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
287 lines
7.2 KiB
C
287 lines
7.2 KiB
C
/* $Id: $
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* $URL: $
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*
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* plugin getting information about network devices (IPaddress, MACaddress, ...)
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*
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* Copyright (C) 2007 Volker Gering <v.gering@t-online.de>
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* Copyright (C) 2004, 2005, 2006, 2007 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux 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, or (at your option)
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* any later version.
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*
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* LCD4Linux 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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*/
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/*
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* exported functions:
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*
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* int plugin_init_netinfo (void)
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* adds functions to get information about network devices
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*
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <ctype.h>
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#include "debug.h"
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#include "plugin.h"
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#include "qprintf.h"
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#include <sys/types.h> /* socket() */
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#include <sys/socket.h> /* socket() */
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#include <sys/ioctl.h> /* SIOCGIFNAME */
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#include <net/if.h> /* ifreq{} */
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#include <errno.h> /* errno */
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#include <netinet/in.h> /* inet_ntoa() */
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#include <arpa/inet.h> /* inet_ntoa() */
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/* socket descriptor:
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* -2 initial state
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* -1 error: message not printed
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* -3 error: message printed, deactivate plugin
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*/
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static int socknr = -2;
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static int open_net(void)
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{
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if (socknr == -3)
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return -1;
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if (socknr == -2) {
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socknr = socket(PF_INET, SOCK_DGRAM, 0);
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}
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if (socknr == -1) {
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error("%s: socket(PF_INET, SOCK_DGRAM, 0) failed: %s", "plugin_netinfo", strerror(errno));
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error(" deactivate plugin netinfo");
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socknr = -3;
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return -1;
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}
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return 0;
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}
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static void my_exists(RESULT * result, RESULT * arg1)
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{
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char buf[10240];
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struct ifconf ifcnf;
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struct ifreq *ifreq;
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int len;
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double value = 0.0; // netdev doesn't exists
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char devname[80];
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if (socknr < 0) {
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/* no open socket */
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SetResult(&result, R_NUMBER, &value);
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return;
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}
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ifcnf.ifc_len = sizeof(buf);
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ifcnf.ifc_buf = buf;
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if (ioctl(socknr, SIOCGIFCONF, &ifcnf) < 0) {
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/* error getting list of devices */
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error("%s: ioctl(IFCONF) for %s failed: %s", "plugin_netinfo", R2S(arg1), strerror(errno));
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SetResult(&result, R_NUMBER, &value);
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return;
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}
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if (0 == ifcnf.ifc_len) {
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/* no interfaces found */
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SetResult(&result, R_NUMBER, &value);
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return;
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}
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ifreq = (struct ifreq *) buf;
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len = sizeof(struct ifreq);
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strncpy(devname, R2S(arg1), sizeof(devname));
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while (ifreq && *((char *) ifreq) && ((char *) ifreq) < buf + ifcnf.ifc_len) {
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if (*((char *) ifreq) && strncmp(ifreq->ifr_name, devname, sizeof(devname)) == 0) {
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/* found */
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value = 1.0;
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SetResult(&result, R_NUMBER, &value);
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return;
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}
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(*(char **) &ifreq) += len;
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}
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/* device doesn't exists */
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SetResult(&result, R_NUMBER, &value);
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}
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/* get MAC address (hardware address) of network device */
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static void my_hwaddr(RESULT * result, RESULT * arg1)
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{
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static int errcount = 0;
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struct ifreq ifreq;
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unsigned char *hw;
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char value[18];
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if (socknr < 0) {
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/* no open socket */
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SetResult(&result, R_STRING, "");
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return;
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}
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strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name));
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#ifndef __MAC_OS_X_VERSION_10_3
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// Linux: get interface MAC address
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if (ioctl(socknr, SIOCGIFHWADDR, &ifreq) < 0) {
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#else
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// MacOS: get interface MAC address
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if (ioctl(socknr, SIOCGLIFPHYADDR, &ifreq) < 0) {
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#endif
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errcount++;
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if (1 == errcount % 1000) {
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error("%s: ioctl(IF_HARDW_ADDR %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno));
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error(" (skip next 1000 errors)");
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}
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SetResult(&result, R_STRING, "");
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return;
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}
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#ifndef __MAC_OS_X_VERSION_10_3
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hw = (unsigned char *) ifreq.ifr_hwaddr.sa_data;
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#else
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hw = (unsigned char *) ifreq.ifr_data;
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#endif
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qprintf(value, sizeof(value), "%02x:%02x:%02x:%02x:%02x:%02x",
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*hw, *(hw + 1), *(hw + 2), *(hw + 3), *(hw + 4), *(hw + 5));
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SetResult(&result, R_STRING, value);
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}
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/* get ip address of network device */
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static void my_ipaddr(RESULT * result, RESULT * arg1)
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{
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static int errcount = 0;
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struct ifreq ifreq;
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struct sockaddr_in *sin;
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char value[16];
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if (socknr < 0) {
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/* no open socket */
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SetResult(&result, R_STRING, "");
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return;
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}
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strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name));
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if (ioctl(socknr, SIOCGIFADDR, &ifreq) < 0) {
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errcount++;
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if (1 == errcount % 1000) {
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error("%s: ioctl(IFADDR %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno));
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error(" (skip next 1000 errors)");
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}
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SetResult(&result, R_STRING, "");
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return;
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}
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sin = (struct sockaddr_in *) &ifreq.ifr_addr;
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qprintf(value, sizeof(value), "%s", inet_ntoa(sin->sin_addr));
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SetResult(&result, R_STRING, value);
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}
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/* get ip netmask of network device */
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static void my_netmask(RESULT * result, RESULT * arg1)
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{
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static int errcount = 0;
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struct ifreq ifreq;
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struct sockaddr_in *sin;
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char value[16];
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if (socknr < 0) {
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/* no open socket */
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SetResult(&result, R_STRING, "");
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return;
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}
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strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name));
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if (ioctl(socknr, SIOCGIFNETMASK, &ifreq) < 0) {
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errcount++;
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if (1 == errcount % 1000) {
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error("%s: ioctl(IFNETMASK %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno));
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error(" (skip next 1000 errors)");
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}
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SetResult(&result, R_STRING, "");
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return;
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}
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#ifndef __MAC_OS_X_VERSION_10_3
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sin = (struct sockaddr_in *) &ifreq.ifr_netmask;
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#else
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sin = (struct sockaddr_in *) &ifreq.ifr_data;
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#endif
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qprintf(value, sizeof(value), "%s", inet_ntoa(sin->sin_addr));
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SetResult(&result, R_STRING, value);
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}
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/* get ip broadcast address of network device */
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static void my_bcaddr(RESULT * result, RESULT * arg1)
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{
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static int errcount = 0;
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struct ifreq ifreq;
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struct sockaddr_in *sin;
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char value[16];
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if (socknr < 0) {
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/* no open socket */
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SetResult(&result, R_STRING, "");
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return;
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}
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strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name));
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if (ioctl(socknr, SIOCGIFBRDADDR, &ifreq) < 0) {
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errcount++;
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if (1 == errcount % 1000) {
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error("%s: ioctl(IFBRDADDR %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno));
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error(" (skip next 1000 errors)");
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}
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SetResult(&result, R_STRING, "");
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return;
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}
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sin = (struct sockaddr_in *) &ifreq.ifr_broadaddr;
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qprintf(value, sizeof(value), "%s", inet_ntoa(sin->sin_addr));
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SetResult(&result, R_STRING, value);
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}
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int plugin_init_netinfo(void)
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{
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open_net();
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AddFunction("netinfo::exists", 1, my_exists);
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AddFunction("netinfo::hwaddr", 1, my_hwaddr);
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AddFunction("netinfo::ipaddr", 1, my_ipaddr);
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AddFunction("netinfo::netmask", 1, my_netmask);
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AddFunction("netinfo::bcaddr", 1, my_bcaddr);
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return 0;
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}
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void plugin_exit_netinfo(void)
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{
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close(socknr);
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}
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