diff --git a/node/osdep/LinuxRoutingTable.cpp b/node/osdep/LinuxRoutingTable.cpp index e69de29bb..67a5b22d1 100644 --- a/node/osdep/LinuxRoutingTable.cpp +++ b/node/osdep/LinuxRoutingTable.cpp @@ -0,0 +1,247 @@ +/* + * ZeroTier One - Global Peer to Peer Ethernet + * Copyright (C) 2011-2014 ZeroTier Networks LLC + * + * This program 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 3 of the License, or + * (at your option) any later version. + * + * This program 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, see . + * + * -- + * + * ZeroTier may be used and distributed under the terms of the GPLv3, which + * are available at: http://www.gnu.org/licenses/gpl-3.0.html + * + * If you would like to embed ZeroTier into a commercial application or + * redistribute it in a modified binary form, please contact ZeroTier Networks + * LLC. Start here: http://www.zerotier.com/ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "../Constants.hpp" +#include "../Utils.hpp" +#include "LinuxRoutingTable.hpp" + +#define ZT_LINUX_IP_COMMAND "/sbin/ip" + +namespace ZeroTier { + +LinuxRoutingTable::LinuxRoutingTable() +{ +} + +LinuxRoutingTable::~LinuxRoutingTable() +{ +} + +std::vector LinuxRoutingTable::get(bool includeLinkLocal,bool includeLoopback) const +{ + char buf[131072]; + char *stmp,*stmp2; + std::vector entries; + + { + int fd = ::open("/proc/net/route",O_RDONLY); + if (fd <= 0) + buf[0] = (char)0; + else { + int n = (int)::read(fd,buf,sizeof(buf) - 1); + ::close(fd); + if (n < 0) n = 0; + buf[n] = (char)0; + } + } + + int lineno = 0; + for(char *line=Utils::stok(buf,"\r\n",&stmp);(line);line=Utils::stok((char *)0,"\r\n",&stmp)) { + if (lineno == 0) { + ++lineno; + continue; // skip header + } + + char *iface = (char *)0; + uint32_t destination = 0; + uint32_t gateway = 0; + int metric = 0; + uint32_t mask = 0; + + int fno = 0; + for(char *f=Utils::stok(line,"\t \r\n",&stmp2);(f);f=Utils::stok((char *)0,"\t \r\n",&stmp2)) { + switch(fno) { + case 0: iface = f; break; + case 1: destination = (uint32_t)Utils::hexStrToULong(f); break; + case 2: gateway = (uint32_t)Utils::hexStrToULong(f); break; + case 6: metric = (int)Utils::strToInt(f); break; + case 7: mask = (uint32_t)Utils::hexStrToULong(f); break; + } + ++fno; + } + + if ((iface)&&(destination)) { + RoutingTable::Entry e; + if (destination) + e.destination.set(&destination,4,Utils::countBits(mask)); + e.gateway.set(&gateway,4,0); + e.deviceIndex = 0; // not used on Linux + e.metric = metric; + Utils::scopy(e.device,sizeof(e.device),iface); + if ((e.destination)&&((includeLinkLocal)||(!e.destination.isLinkLocal()))&&((includeLoopback)||((!e.destination.isLoopback())&&(!e.gateway.isLoopback())&&(strcmp(iface,"lo"))))) + entries.push_back(e); + } + + ++lineno; + } + + { + int fd = ::open("/proc/net/ipv6_route",O_RDONLY); + if (fd <= 0) + buf[0] = (char)0; + else { + int n = (int)::read(fd,buf,sizeof(buf) - 1); + ::close(fd); + if (n < 0) n = 0; + buf[n] = (char)0; + } + } + + for(char *line=Utils::stok(buf,"\r\n",&stmp);(line);line=Utils::stok((char *)0,"\r\n",&stmp)) { + char *destination = (char *)0; + unsigned int destPrefixLen = 0; + char *gateway = (char *)0; // next hop in ipv6 terminology + int metric = 0; + char *device = (char *)0; + + int fno = 0; + for(char *f=Utils::stok(line,"\t \r\n",&stmp2);(f);f=Utils::stok((char *)0,"\t \r\n",&stmp2)) { + switch(fno) { + case 0: destination = f; break; + case 1: destPrefixLen = (unsigned int)Utils::hexStrToULong(f); break; + case 4: gateway = f; break; + case 5: metric = (int)Utils::hexStrToLong(f); break; + case 9: device = f; break; + } + ++fno; + } + + if ((device)&&(destination)) { + unsigned char tmp[16]; + RoutingTable::Entry e; + Utils::unhex(destination,tmp,16); + if ((!Utils::isZero(tmp,16))&&(tmp[0] != 0xff)) + e.destination.set(tmp,16,destPrefixLen); + Utils::unhex(gateway,tmp,16); + e.gateway.set(tmp,16,0); + e.deviceIndex = 0; // not used on Linux + e.metric = metric; + Utils::scopy(e.device,sizeof(e.device),device); + if ((e.destination)&&((includeLinkLocal)||(!e.destination.isLinkLocal()))&&((includeLoopback)||((!e.destination.isLoopback())&&(!e.gateway.isLoopback())&&(strcmp(device,"lo"))))) + entries.push_back(e); + } + } + + std::sort(entries.begin(),entries.end()); + return entries; +} + +RoutingTable::Entry LinuxRoutingTable::set(const InetAddress &destination,const InetAddress &gateway,const char *device,int metric) +{ + if ((!gateway)&&((!device)||(!device[0]))) + return RoutingTable::Entry(); + + std::vector rtab(get(true,true)); + + for(std::vector::iterator e(rtab.begin());e!=rtab.end();++e) { + if (e->destination == destination) { + if (((!device)||(!device[0]))||(!strcmp(device,e->device))) { + } + } + } + + if (metric < 0) + return RoutingTable::Entry(); + + + + rtab = get(true,true); + std::vector::iterator bestEntry(rtab.end()); + for(std::vector::iterator e(rtab.begin());e!=rtab.end();++e) { + if ((e->destination == destination)&&(e->gateway.ipsEqual(gateway))) { + if ((device)&&(device[0])) { + if (!strcmp(device,e->device)) { + if (metric == e->metric) + bestEntry = e; + } + } + if (bestEntry == rtab.end()) + bestEntry = e; + } + } + if (bestEntry != rtab.end()) + return *bestEntry; + + return RoutingTable::Entry(); +} + +} // namespace ZeroTier + +// Enable and build to test routing table interface +//#if 0 +using namespace ZeroTier; +int main(int argc,char **argv) +{ + LinuxRoutingTable rt; + + printf(" \n"); + std::vector ents(rt.get()); + for(std::vector::iterator e(ents.begin());e!=ents.end();++e) + printf("%s\n",e->toString().c_str()); + printf("\n"); + + printf("adding 1.1.1.0 and 2.2.2.0...\n"); + rt.set(InetAddress("1.1.1.0",24),InetAddress("1.2.3.4",0),(const char *)0,1); + rt.set(InetAddress("2.2.2.0",24),InetAddress(),"en0",1); + printf("\n"); + + printf(" \n"); + ents = rt.get(); + for(std::vector::iterator e(ents.begin());e!=ents.end();++e) + printf("%s\n",e->toString().c_str()); + printf("\n"); + + printf("deleting 1.1.1.0 and 2.2.2.0...\n"); + rt.set(InetAddress("1.1.1.0",24),InetAddress("1.2.3.4",0),(const char *)0,-1); + rt.set(InetAddress("2.2.2.0",24),InetAddress(),"en0",-1); + printf("\n"); + + printf(" \n"); + ents = rt.get(); + for(std::vector::iterator e(ents.begin());e!=ents.end();++e) + printf("%s\n",e->toString().c_str()); + printf("\n"); + + return 0; +} +//#endif diff --git a/node/osdep/LinuxRoutingTable.hpp b/node/osdep/LinuxRoutingTable.hpp index e69de29bb..9a5d3fd6d 100644 --- a/node/osdep/LinuxRoutingTable.hpp +++ b/node/osdep/LinuxRoutingTable.hpp @@ -0,0 +1,49 @@ +/* + * ZeroTier One - Global Peer to Peer Ethernet + * Copyright (C) 2011-2014 ZeroTier Networks LLC + * + * This program 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 3 of the License, or + * (at your option) any later version. + * + * This program 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, see . + * + * -- + * + * ZeroTier may be used and distributed under the terms of the GPLv3, which + * are available at: http://www.gnu.org/licenses/gpl-3.0.html + * + * If you would like to embed ZeroTier into a commercial application or + * redistribute it in a modified binary form, please contact ZeroTier Networks + * LLC. Start here: http://www.zerotier.com/ + */ + +#ifndef ZT_LINUXROUTINGTABLE_HPP +#define ZT_LINUXROUTINGTABLE_HPP + +#include "../RoutingTable.hpp" + +namespace ZeroTier { + +/** + * Routing table interface via /proc/net/route, /proc/net/ipv6_route, and /sbin/route command + */ +class LinuxRoutingTable : public RoutingTable +{ +public: + LinuxRoutingTable(); + virtual ~LinuxRoutingTable(); + virtual std::vector get(bool includeLinkLocal = false,bool includeLoopback = false) const; + virtual RoutingTable::Entry set(const InetAddress &destination,const InetAddress &gateway,const char *device,int metric); +}; + +} // namespace ZeroTier + +#endif