From 181cec4348da40331b3e8ab365732c025ec149b2 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Wed, 27 Apr 2011 19:24:15 +0200 Subject: Import upstream version 0.11.0~svn1143 --- plugin_netinfo.c | 325 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 plugin_netinfo.c (limited to 'plugin_netinfo.c') diff --git a/plugin_netinfo.c b/plugin_netinfo.c new file mode 100644 index 0000000..34f694d --- /dev/null +++ b/plugin_netinfo.c @@ -0,0 +1,325 @@ +/* $Id: $ + * $URL: $ + * + * plugin getting information about network devices (IPaddress, MACaddress, ...) + * + * Copyright (C) 2007 Volker Gering + * Copyright (C) 2004, 2005, 2006, 2007 The LCD4Linux Team + * + * This file is part of LCD4Linux. + * + * LCD4Linux is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * LCD4Linux is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* + * exported functions: + * + * int plugin_init_netinfo (void) + * adds functions to get information about network devices + * + */ + + +#include "config.h" + +#include +#include +#include /* memcpy() */ +#include +#include /* rint(), log2l() */ + +#include "debug.h" +#include "plugin.h" +#include "qprintf.h" + +#include /* socket() */ +#include /* socket() */ +#include /* SIOCGIFNAME */ +#include /* ifreq{} */ +#include /* errno */ +#include /* inet_ntoa() */ +#include /* inet_ntoa() */ + + +/* socket descriptor: + * -2 initial state + * -1 error: message not printed + * -3 error: message printed, deactivate plugin + */ +static int socknr = -2; + +static int open_net(void) +{ + + if (socknr == -3) + return -1; + if (socknr == -2) { + socknr = socket(PF_INET, SOCK_DGRAM, 0); + } + if (socknr == -1) { + error("%s: socket(PF_INET, SOCK_DGRAM, 0) failed: %s", "plugin_netinfo", strerror(errno)); + error(" deactivate plugin netinfo"); + socknr = -3; + return -1; + } + + return 0; +} + + +static void my_exists(RESULT * result, RESULT * arg1) +{ + char buf[10240]; + struct ifconf ifcnf; + struct ifreq *ifreq; + int len; + double value = 0.0; // netdev doesn't exists + char devname[80]; + + if (socknr < 0) { + /* no open socket */ + SetResult(&result, R_NUMBER, &value); + return; + } + + ifcnf.ifc_len = sizeof(buf); + ifcnf.ifc_buf = buf; + if (ioctl(socknr, SIOCGIFCONF, &ifcnf) < 0) { + /* error getting list of devices */ + error("%s: ioctl(IFCONF) for %s failed: %s", "plugin_netinfo", R2S(arg1), strerror(errno)); + SetResult(&result, R_NUMBER, &value); + return; + } + if (0 == ifcnf.ifc_len) { + /* no interfaces found */ + SetResult(&result, R_NUMBER, &value); + return; + } + + ifreq = (struct ifreq *) buf; + len = sizeof(struct ifreq); + strncpy(devname, R2S(arg1), sizeof(devname)); + + while (ifreq && *((char *) ifreq) && ((char *) ifreq) < buf + ifcnf.ifc_len) { + if (*((char *) ifreq) && strncmp(ifreq->ifr_name, devname, sizeof(devname)) == 0) { + /* found */ + value = 1.0; + SetResult(&result, R_NUMBER, &value); + return; + } + + (*(char **) &ifreq) += len; + } + + /* device doesn't exists */ + SetResult(&result, R_NUMBER, &value); +} + + +/* get MAC address (hardware address) of network device */ +static void my_hwaddr(RESULT * result, RESULT * arg1) +{ + static int errcount = 0; + struct ifreq ifreq; + unsigned char *hw; + char value[18]; + + if (socknr < 0) { + /* no open socket */ + SetResult(&result, R_STRING, ""); + return; + } + + strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name)); +#ifndef __MAC_OS_X_VERSION_10_3 + // Linux: get interface MAC address + if (ioctl(socknr, SIOCGIFHWADDR, &ifreq) < 0) { +#else + // MacOS: get interface MAC address + if (ioctl(socknr, SIOCGLIFPHYADDR, &ifreq) < 0) { +#endif + errcount++; + if (1 == errcount % 1000) { + error("%s: ioctl(IF_HARDW_ADDR %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno)); + error(" (skip next 1000 errors)"); + } + SetResult(&result, R_STRING, ""); + return; + } +#ifndef __MAC_OS_X_VERSION_10_3 + hw = (unsigned char *) ifreq.ifr_hwaddr.sa_data; +#else + hw = (unsigned char *) ifreq.ifr_data; +#endif + qprintf(value, sizeof(value), "%02x:%02x:%02x:%02x:%02x:%02x", + *hw, *(hw + 1), *(hw + 2), *(hw + 3), *(hw + 4), *(hw + 5)); + + SetResult(&result, R_STRING, value); +} + + +/* get ip address of network device */ +static void my_ipaddr(RESULT * result, RESULT * arg1) +{ + static int errcount = 0; + struct ifreq ifreq; + struct sockaddr_in *sin; + char value[16]; + + if (socknr < 0) { + /* no open socket */ + SetResult(&result, R_STRING, ""); + return; + } + + strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name)); + if (ioctl(socknr, SIOCGIFADDR, &ifreq) < 0) { + errcount++; + if (1 == errcount % 1000) { + error("%s: ioctl(IFADDR %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno)); + error(" (skip next 1000 errors)"); + } + SetResult(&result, R_STRING, ""); + return; + } + sin = (struct sockaddr_in *) &ifreq.ifr_addr; + qprintf(value, sizeof(value), "%s", inet_ntoa(sin->sin_addr)); + + SetResult(&result, R_STRING, value); +} + + +struct sockaddr_in *get_netmask(RESULT * arg1) +{ + static int errcount = 0; + struct ifreq ifreq; + struct sockaddr_in *sin; + static struct sockaddr_in sret; + + strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name)); + if (ioctl(socknr, SIOCGIFNETMASK, &ifreq) < 0) { + errcount++; + if (1 == errcount % 1000) { + error("%s: ioctl(IFNETMASK %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno)); + error(" (skip next 1000 errors)"); + } + return NULL; + } +#ifndef __MAC_OS_X_VERSION_10_3 + sin = (struct sockaddr_in *) &ifreq.ifr_netmask; +#else + sin = (struct sockaddr_in *) &ifreq.ifr_data; +#endif + + memcpy(&sret, sin, sizeof(sret)); + return &sret; +} + +/* get ip netmask of network device */ +static void my_netmask(RESULT * result, RESULT * arg1) +{ + char value[16]; + struct sockaddr_in *sin; + + if (socknr < 0) { + /* no open socket */ + SetResult(&result, R_STRING, ""); + return; + } + + sin = get_netmask(arg1); + qprintf(value, sizeof(value), "%s", NULL != sin ? inet_ntoa(sin->sin_addr) : "?"); + + SetResult(&result, R_STRING, value); +} + + +/* get netmask in short CIDR notation */ +static void my_netmask_short(RESULT * result, RESULT * arg1) +{ + char value[16]; + struct sockaddr_in *sin; + int netlen = 0; + long double logval = 0.0; + + if (socknr < 0) { + /* no open socket */ + SetResult(&result, R_STRING, ""); + return; + } + + sin = get_netmask(arg1); + if (NULL != sin) { + logval = (long double) (get_netmask(arg1)->sin_addr.s_addr); + netlen = (int) rint(log2l(logval) / log2l(2.0)); + qprintf(value, sizeof(value), "/%d", netlen); + } else { + qprintf(value, sizeof(value), "/?"); + } + + SetResult(&result, R_STRING, value); +} + + +/* get ip broadcast address of network device */ +static void my_bcaddr(RESULT * result, RESULT * arg1) +{ + static int errcount = 0; + struct ifreq ifreq; + struct sockaddr_in *sin; + char value[16]; + + if (socknr < 0) { + /* no open socket */ + SetResult(&result, R_STRING, ""); + return; + } + + strncpy(ifreq.ifr_name, R2S(arg1), sizeof(ifreq.ifr_name)); + if (ioctl(socknr, SIOCGIFBRDADDR, &ifreq) < 0) { + errcount++; + if (1 == errcount % 1000) { + error("%s: ioctl(IFBRDADDR %s) failed: %s", "plugin_netinfo", ifreq.ifr_name, strerror(errno)); + error(" (skip next 1000 errors)"); + } + SetResult(&result, R_STRING, ""); + return; + } + sin = (struct sockaddr_in *) &ifreq.ifr_broadaddr; + qprintf(value, sizeof(value), "%s", inet_ntoa(sin->sin_addr)); + + SetResult(&result, R_STRING, value); +} + + +int plugin_init_netinfo(void) +{ + open_net(); + + AddFunction("netinfo::exists", 1, my_exists); + AddFunction("netinfo::hwaddr", 1, my_hwaddr); + AddFunction("netinfo::ipaddr", 1, my_ipaddr); + AddFunction("netinfo::netmask", 1, my_netmask); + AddFunction("netinfo::netmask_short", 1, my_netmask_short); + AddFunction("netinfo::bcaddr", 1, my_bcaddr); + + return 0; +} + +void plugin_exit_netinfo(void) +{ + close(socknr); +} -- cgit v1.2.3