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https://github.com/zerotier/ZeroTierOne.git
synced 2025-01-18 02:40:13 +00:00
Bring BSDEthernetTap into the current century.
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2810cd7c15
commit
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@ -59,10 +59,12 @@
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#include <map>
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#include <set>
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#include <algorithm>
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#include <utility>
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#include "../node/Constants.hpp"
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#include "../node/Utils.hpp"
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#include "../node/Mutex.hpp"
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#include "OSUtils.hpp"
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#include "BSDEthernetTap.hpp"
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#define ZT_BASE32_CHARS "0123456789abcdefghijklmnopqrstuv"
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@ -73,17 +75,17 @@ static const ZeroTier::MulticastGroup _blindWildcardMulticastGroup(ZeroTier::MAC
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namespace ZeroTier {
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BSDEthernetTap::BSDEthernetTap(
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const char *homePath,
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const MAC &mac,
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unsigned int mtu,
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unsigned int metric,
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uint64_t nwid,
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const char *desiredDevice,
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const char *friendlyName,
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void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
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void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
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void *arg) :
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EthernetTap("BSDEthernetTap",mac,mtu,metric),
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_handler(handler),
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_arg(arg),
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_nwid(nwid),
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_mtu(mtu),
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_metric(metric),
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_fd(0),
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@ -117,11 +119,11 @@ BSDEthernetTap::BSDEthernetTap(
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// On BSD we create taps and they can have high numbers, so use ones starting
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// at 9993 to not conflict with other stuff. Then we rename it to zt<base32 of nwid>
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std::map<std::string,bool> devFiles(Utils::listDirectory("/dev"));
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std::vector<std::string> devFiles(OSUtils::listDirectory("/dev"));
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for(int i=9993;i<(9993+128);++i) {
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Utils::snprintf(tmpdevname,sizeof(tmpdevname),"tap%d",i);
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Utils::snprintf(devpath,sizeof(devpath),"/dev/%s",tmpdevname);
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if (devFiles.count(std::string(tmpdevname)) == 0) {
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if (std::find(devFiles.begin(),devFiles.end(),std::string(tmpdevname)) == devFiles.end()) {
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long cpid = (long)vfork();
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if (cpid == 0) {
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::execl("/sbin/ifconfig","/sbin/ifconfig",tmpdevname,"create",(const char *)0);
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@ -207,7 +209,6 @@ BSDEthernetTap::~BSDEthernetTap()
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void BSDEthernetTap::setEnabled(bool en)
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{
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_enabled = en;
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// TODO: interface status change
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}
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bool BSDEthernetTap::enabled() const
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@ -234,12 +235,12 @@ bool BSDEthernetTap::addIP(const InetAddress &ip)
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if (!ip)
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return false;
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std::set<InetAddress> allIps(ips());
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if (allIps.count(ip) > 0)
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std::vector<InetAddress> allIps(ips());
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if (std::find(allIps.begin(),allIps.end(),ip) != allIps.end())
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return true; // IP/netmask already assigned
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// Remove and reconfigure if address is the same but netmask is different
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for(std::set<InetAddress>::iterator i(allIps.begin());i!=allIps.end();++i) {
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for(std::vector<InetAddress>::iterator i(allIps.begin());i!=allIps.end();++i) {
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if ((i->ipsEqual(ip))&&(i->netmaskBits() != ip.netmaskBits())) {
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if (___removeIp(_dev,*i))
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break;
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@ -260,7 +261,8 @@ bool BSDEthernetTap::addIP(const InetAddress &ip)
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bool BSDEthernetTap::removeIP(const InetAddress &ip)
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{
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if (ips().count(ip) > 0) {
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std::vector<InetAddress> allIps(ips());
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if (std::find(allIps.begin(),allIps.end(),ip) != allIps.end()) {
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if (___removeIp(_dev,ip))
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return true;
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}
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@ -273,7 +275,7 @@ std::set<InetAddress> BSDEthernetTap::ips() const
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if (getifaddrs(&ifa))
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return std::set<InetAddress>();
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std::set<InetAddress> r;
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std::vector<InetAddress> r;
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struct ifaddrs *p = ifa;
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while (p) {
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@ -282,14 +284,14 @@ std::set<InetAddress> BSDEthernetTap::ips() const
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case AF_INET: {
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struct sockaddr_in *sin = (struct sockaddr_in *)p->ifa_addr;
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struct sockaddr_in *nm = (struct sockaddr_in *)p->ifa_netmask;
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r.insert(InetAddress(&(sin->sin_addr.s_addr),4,Utils::countBits((uint32_t)nm->sin_addr.s_addr)));
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r.push_back(InetAddress(&(sin->sin_addr.s_addr),4,Utils::countBits((uint32_t)nm->sin_addr.s_addr)));
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} break;
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case AF_INET6: {
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struct sockaddr_in6 *sin = (struct sockaddr_in6 *)p->ifa_addr;
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struct sockaddr_in6 *nm = (struct sockaddr_in6 *)p->ifa_netmask;
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uint32_t b[4];
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memcpy(b,nm->sin6_addr.s6_addr,sizeof(b));
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r.insert(InetAddress(sin->sin6_addr.s6_addr,16,Utils::countBits(b[0]) + Utils::countBits(b[1]) + Utils::countBits(b[2]) + Utils::countBits(b[3])));
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r.push_back(InetAddress(sin->sin6_addr.s6_addr,16,Utils::countBits(b[0]) + Utils::countBits(b[1]) + Utils::countBits(b[2]) + Utils::countBits(b[3])));
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} break;
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}
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}
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@ -299,6 +301,9 @@ std::set<InetAddress> BSDEthernetTap::ips() const
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if (ifa)
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freeifaddrs(ifa);
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std::sort(r.begin(),r.end());
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std::unique(r.begin(),r.end());
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return r;
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}
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@ -324,6 +329,45 @@ void BSDEthernetTap::setFriendlyName(const char *friendlyName)
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{
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}
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void BSDEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed)
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{
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std::vector<MulticastGroup> newGroups;
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struct ifmaddrs *ifmap = (struct ifmaddrs *)0;
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if (!getifmaddrs(&ifmap)) {
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struct ifmaddrs *p = ifmap;
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while (p) {
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if (p->ifma_addr->sa_family == AF_LINK) {
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struct sockaddr_dl *in = (struct sockaddr_dl *)p->ifma_name;
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struct sockaddr_dl *la = (struct sockaddr_dl *)p->ifma_addr;
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if ((la->sdl_alen == 6)&&(in->sdl_nlen <= _dev.length())&&(!memcmp(_dev.data(),in->sdl_data,in->sdl_nlen)))
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newGroups.push_back(MulticastGroup(MAC(la->sdl_data + la->sdl_nlen,6),0));
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}
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p = p->ifma_next;
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}
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freeifmaddrs(ifmap);
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}
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std::vector<InetAddress> allIps(ips());
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for(std::vector<InetAddress>::iterator ip(allIps.begin());ip!=allIps.end();++ip)
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newGroups.push_back(MulticastGroup::deriveMulticastGroupForAddressResolution(*ip));
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std::sort(newGroups.begin(),newGroups.end());
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std::unique(newGroups.begin(),newGroups.end());
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for(std::vector<MulticastGroup>::iterator m(newGroups.begin());m!=newGroups.end();++m) {
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if (!std::binary_search(_multicastGroups.begin(),_multicastGroups.end(),*m))
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added.push_back(*m);
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}
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for(std::vector<MulticastGroup>::iterator m(_multicastGroups.begin());m!=_multicastGroups.end();++m) {
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if (!std::binary_search(newGroups.begin(),newGroups.end(),*m))
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removed.push_back(*m);
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}
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_multicastGroups.swap(newGroups);
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}
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/*
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bool BSDEthernetTap::updateMulticastGroups(std::set<MulticastGroup> &groups)
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{
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std::set<MulticastGroup> newGroups;
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@ -365,11 +409,7 @@ bool BSDEthernetTap::updateMulticastGroups(std::set<MulticastGroup> &groups)
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return changed;
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}
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bool BSDEthernetTap::injectPacketFromHost(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len)
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{
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return false;
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}
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*/
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void BSDEthernetTap::threadMain()
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throw()
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@ -378,7 +418,6 @@ void BSDEthernetTap::threadMain()
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MAC to,from;
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int n,nfds,r;
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char getBuf[8194];
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Buffer<4096> data;
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// Wait for a moment after startup -- wait for Network to finish
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// constructing itself.
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@ -416,7 +455,8 @@ void BSDEthernetTap::threadMain()
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from.setTo(getBuf + 6,6);
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unsigned int etherType = ntohs(((const uint16_t *)getBuf)[6]);
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data.copyFrom(getBuf + 14,(unsigned int)r - 14);
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_handler(_arg,from,to,etherType,data);
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// TODO: VLAN support
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_handler(_arg,_nwid,from,to,etherType,0,(const void *)(getBuf + 14),r - 14);
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}
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r = 0;
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#include <stdio.h>
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#include <stdlib.h>
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#include <string>
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#include <vector>
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#include <stdexcept>
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#include "EthernetTap.hpp"
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#include "../node/Constants.hpp"
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#include "../node/MulticastGroup.hpp"
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#include "../node/MAC.hpp"
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#include "Thread.hpp"
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namespace ZeroTier {
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class BSDEthernetTap : public EthernetTap
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class BSDEthernetTap
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{
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public:
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BSDEthernetTap(
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const char *homePath,
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const MAC &mac,
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unsigned int mtu,
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unsigned int metric,
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uint64_t nwid,
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const char *desiredDevice,
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const char *friendlyName,
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void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
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void (*handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int),
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void *arg);
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virtual ~BSDEthernetTap();
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~BSDEthernetTap();
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virtual void setEnabled(bool en);
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virtual bool enabled() const;
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virtual bool addIP(const InetAddress &ip);
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virtual bool removeIP(const InetAddress &ip);
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virtual std::set<InetAddress> ips() const;
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virtual void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
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virtual std::string deviceName() const;
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virtual void setFriendlyName(const char *friendlyName);
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virtual bool updateMulticastGroups(std::set<MulticastGroup> &groups);
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virtual bool injectPacketFromHost(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
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void setEnabled(bool en);
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bool enabled() const;
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bool addIp(const InetAddress &ip);
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bool removeIp(const InetAddress &ip);
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std::vector<InetAddress> ips() const;
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void put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len);
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std::string deviceName() const;
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void setFriendlyName(const char *friendlyName);
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void scanMulticastGroups(std::vector<MulticastGroup> &added,std::vector<MulticastGroup> &removed);
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void threadMain()
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throw();
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private:
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void (*_handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &);
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void (*_handler)(void *,uint64_t,const MAC &,const MAC &,unsigned int,unsigned int,const void *,unsigned int);
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void *_arg;
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uint64_t _nwid;
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Thread _thread;
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std::string _dev;
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std::vector<MulticastGroup> _multicastGroups;
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unsigned int _mtu;
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unsigned int _metric;
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int _fd;
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