diff options
Diffstat (limited to 'osdep/LinuxEthernetTap.cpp')
| -rw-r--r-- | osdep/LinuxEthernetTap.cpp | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/osdep/LinuxEthernetTap.cpp b/osdep/LinuxEthernetTap.cpp index 2d3891e3..6a3ac4cb 100644 --- a/osdep/LinuxEthernetTap.cpp +++ b/osdep/LinuxEthernetTap.cpp @@ -87,9 +87,6 @@ LinuxEthernetTap::LinuxEthernetTap( Mutex::Lock _l(__tapCreateLock); // create only one tap at a time, globally - if (mtu > 2800) - throw std::runtime_error("max tap MTU is 2800"); - _fd = ::open("/dev/net/tun",O_RDWR); if (_fd <= 0) { _fd = ::open("/dev/tun",O_RDWR); @@ -386,7 +383,7 @@ std::vector<InetAddress> LinuxEthernetTap::ips() const void LinuxEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len) { - char putBuf[8194]; + char putBuf[ZT_MAX_MTU + 64]; if ((_fd > 0)&&(len <= _mtu)&&(_enabled)) { to.copyTo(putBuf,6); from.copyTo(putBuf + 6,6); @@ -455,13 +452,28 @@ void LinuxEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,st _multicastGroups.swap(newGroups); } +void LinuxEthernetTap::setMtu(unsigned int mtu) +{ + if (_mtu != mtu) { + _mtu = mtu; + int sock = socket(AF_INET,SOCK_DGRAM,0); + if (sock > 0) { + struct ifreq ifr; + memset(&ifr,0,sizeof(ifr)); + ifr.ifr_ifru.ifru_mtu = (int)mtu; + ioctl(sock,SIOCSIFMTU,(void *)&ifr); + close(sock); + } + } +} + void LinuxEthernetTap::threadMain() throw() { fd_set readfds,nullfds; MAC to,from; int n,nfds,r; - char getBuf[8194]; + char getBuf[ZT_MAX_MTU + 64]; Thread::sleep(500); |