mirror of
https://github.com/tuxbox-neutrino/neutrino.git
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5aa75e5820
e.g. network setup was leaking demux file descriptors to udhcpc leading to strange issues later when trying to restart neutrino etc.
322 lines
8.6 KiB
C++
322 lines
8.6 KiB
C++
/*
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* $port: configure_network.cpp,v 1.7 2009/11/20 22:44:19 tuxbox-cvs Exp $
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*
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* (C) 2003 by thegoodguy <thegoodguy@berlios.de>
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* (C) 2011 Stefan Seyfried
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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 3 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, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <cstdio> /* perror... */
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#include <sys/wait.h>
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#include <sys/types.h> /* u_char */
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#include <string.h>
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#include "configure_network.h"
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#include "libnet.h" /* netGetNameserver, netSetNameserver */
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#include "network_interfaces.h" /* getInetAttributes, setInetAttributes */
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#include <stdlib.h> /* system */
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#include <iostream>
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#include <iomanip>
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#include <sstream>
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#include <fstream>
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#include <system/safe_system.h>
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CNetworkConfig::CNetworkConfig()
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{
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char our_nameserver[16];
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netGetNameserver(our_nameserver);
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nameserver = our_nameserver;
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ifname = "eth0";
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}
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CNetworkConfig* CNetworkConfig::getInstance()
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{
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static CNetworkConfig* network_config = NULL;
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if(!network_config)
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{
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network_config = new CNetworkConfig();
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printf("[network config] Instance created\n");
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}
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return network_config;
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}
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CNetworkConfig::~CNetworkConfig()
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{
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}
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void CNetworkConfig::readConfig(std::string iname)
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{
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ifname = iname;
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inet_static = getInetAttributes(ifname, automatic_start, address, netmask, broadcast, gateway);
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init_vars();
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copy_to_orig();
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}
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void CNetworkConfig::init_vars(void)
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{
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char mask[16];
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char _broadcast[16];
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char router[16];
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char ip[16];
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unsigned char addr[6];
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hostname = netGetHostname();
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netGetDefaultRoute(router);
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gateway = router;
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/* FIXME its enough to read IP for dhcp only ?
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* static config should not be different from settings in etc/network/interfaces */
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if(!inet_static) {
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netGetIP((char *) ifname.c_str(), ip, mask, _broadcast);
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netmask = mask;
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broadcast = _broadcast;
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address = ip;
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}
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netGetMacAddr((char *) ifname.c_str(), addr);
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std::stringstream mac_tmp;
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for(int i=0;i<6;++i)
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mac_tmp<<std::hex<<std::setfill('0')<<std::setw(2)<<(int)addr[i]<<':';
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mac_addr = mac_tmp.str().substr(0,17);
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key = "";
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ssid = "";
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wireless = 0;
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std::string tmp = "/sys/class/net/" + ifname + "/wireless";
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if(access(tmp.c_str(), R_OK) == 0)
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wireless = 1;
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if(wireless)
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readWpaConfig();
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printf("CNetworkConfig: %s loaded, wireless %s\n", ifname.c_str(), wireless ? "yes" : "no");
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}
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void CNetworkConfig::copy_to_orig(void)
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{
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orig_automatic_start = automatic_start;
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orig_address = address;
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orig_netmask = netmask;
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orig_broadcast = broadcast;
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orig_gateway = gateway;
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orig_inet_static = inet_static;
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orig_hostname = hostname;
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orig_ifname = ifname;
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orig_ssid = ssid;
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orig_key = key;
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}
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bool CNetworkConfig::modified_from_orig(void)
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{
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#ifdef DEBUG
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if(orig_automatic_start != automatic_start)
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printf("CNetworkConfig::modified_from_orig: automatic_start changed\n");
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if(orig_address != address )
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printf("CNetworkConfig::modified_from_orig: address changed\n");
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if(orig_netmask != netmask )
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printf("CNetworkConfig::modified_from_orig: netmask changed\n");
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if(orig_broadcast != broadcast )
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printf("CNetworkConfig::modified_from_orig: broadcast changed\n");
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if(orig_gateway != gateway )
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printf("CNetworkConfig::modified_from_orig: gateway changed\n");
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if(orig_hostname != hostname )
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printf("CNetworkConfig::modified_from_orig: hostname changed\n");
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if(orig_inet_static != inet_static )
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printf("CNetworkConfig::modified_from_orig: inet_static changed\n");
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if(orig_ifname != ifname)
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printf("CNetworkConfig::modified_from_orig: ifname changed\n");
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#endif
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if(wireless) {
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if((ssid != orig_ssid) || (key != orig_key))
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return 1;
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}
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/* check for following changes with dhcp enabled trigger apply question on menu quit,
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* even if apply already done */
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if (inet_static) {
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if ((orig_address != address ) ||
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(orig_netmask != netmask ) ||
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(orig_broadcast != broadcast ) ||
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(orig_gateway != gateway ))
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return 1;
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}
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return (
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(orig_automatic_start != automatic_start) ||
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(orig_hostname != hostname ) ||
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(orig_inet_static != inet_static ) ||
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(orig_ifname != ifname)
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);
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#if 0
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return (
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(orig_automatic_start != automatic_start) ||
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(orig_address != address ) ||
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(orig_netmask != netmask ) ||
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(orig_broadcast != broadcast ) ||
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(orig_gateway != gateway ) ||
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(orig_hostname != hostname ) ||
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(orig_inet_static != inet_static ) ||
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(orig_ifname != ifname)
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);
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#endif
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}
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void CNetworkConfig::commitConfig(void)
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{
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if (modified_from_orig())
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{
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#ifdef DEBUG
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printf("CNetworkConfig::commitConfig: modified, saving (wireless %d, ssid %s key %s)...\n", wireless, ssid.c_str(), key.c_str());
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#endif
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if(orig_hostname != hostname)
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netSetHostname((char *) hostname.c_str());
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if (inet_static)
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{
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addLoopbackDevice("lo", true);
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setStaticAttributes(ifname, automatic_start, address, netmask, broadcast, gateway, wireless);
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}
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else
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{
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addLoopbackDevice("lo", true);
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setDhcpAttributes(ifname, automatic_start, wireless);
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}
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if(wireless && ((key != orig_key) || (ssid != orig_ssid)))
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saveWpaConfig();
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copy_to_orig();
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}
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if (nameserver != orig_nameserver)
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{
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orig_nameserver = nameserver;
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netSetNameserver(nameserver.c_str());
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}
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}
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int mysystem(char * cmd, char * arg1, char * arg2)
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{
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int pid, i;
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switch (pid = fork())
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{
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case -1: /* can't fork */
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perror("fork");
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return -1;
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case 0: /* child process */
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for(i = 3; i < 256; i++)
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close(i);
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if(execlp(cmd, cmd, arg1, arg2, NULL))
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{
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perror("exec");
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}
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exit(0);
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default: /* parent returns to calling process */
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break;
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}
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waitpid(pid, 0, 0);
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return 0;
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}
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void CNetworkConfig::startNetwork(void)
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{
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std::string cmd = "/sbin/ifup " + ifname;
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#ifdef DEBUG
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printf("CNetworkConfig::startNetwork: %s\n", cmd.c_str());
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#endif
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safe_system(cmd.c_str());
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if (!inet_static) {
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init_vars();
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}
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//mysystem((char *) "ifup", (char *) "-v", (char *) "eth0");
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}
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void CNetworkConfig::stopNetwork(void)
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{
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std::string cmd = "/sbin/ifdown " + ifname;
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#ifdef DEBUG
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printf("CNetworkConfig::stopNetwork: %s\n", cmd.c_str());
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#endif
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safe_system(cmd.c_str());
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}
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void CNetworkConfig::readWpaConfig()
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{
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std::string s;
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std::ifstream in("/etc/wpa_supplicant.conf");
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ssid = "";
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key = "";
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if(!in.is_open()) {
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perror("/etc/wpa_supplicant.conf read error");
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return;
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}
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while(getline(in, s)) {
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if(s[0] == '#')
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continue;
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std::string::size_type i = s.find('=');
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if (i != std::string::npos) {
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std::string n = s.substr(0, i);
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std::string val = s.substr(i + 1, s.length() - (i + 1));
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while((i = n.find(' ')) != std::string::npos)
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n.erase(i, 1);
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while((i = n.find('\t')) != std::string::npos)
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n.erase(i, 1);
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if((i = val.find('"')) != std::string::npos)
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val.erase(i, 1);
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if((i = val.rfind('"')) != std::string::npos)
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val.erase(i, 1);
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if(n == "ssid")
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ssid = val;
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else if(n == "psk")
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key = val;
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}
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}
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#ifdef DEBUG
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printf("CNetworkConfig::readWpaConfig: ssid %s key %s\n", ssid.c_str(), key.c_str());
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#endif
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}
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void CNetworkConfig::saveWpaConfig()
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{
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#ifdef DEBUG
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printf("CNetworkConfig::saveWpaConfig\n");
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#endif
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std::ofstream out("/etc/wpa_supplicant.conf");
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if(!out.is_open()) {
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perror("/etc/wpa_supplicant.conf write error");
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return;
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}
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out << "# generated by neutrino\n";
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out << "ctrl_interface=/var/run/wpa_supplicant\n";
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out << "network={\n";
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out << " ssid=\"" + ssid + "\"\n";
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out << " psk=\"" + key + "\"\n";;
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out << " proto=WPA WPA2\n";
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out << " key_mgmt=WPA-PSK\n";
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out << " pairwise=CCMP TKIP\n";
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out << " group=CCMP TKIP\n";
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out << "}\n";
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}
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