diff options
Diffstat (limited to 'osdep/OSXEthernetTap.cpp')
| -rw-r--r-- | osdep/OSXEthernetTap.cpp | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/osdep/OSXEthernetTap.cpp b/osdep/OSXEthernetTap.cpp index f70908b8..dbff6200 100644 --- a/osdep/OSXEthernetTap.cpp +++ b/osdep/OSXEthernetTap.cpp @@ -1,6 +1,6 @@ /* * ZeroTier One - Network Virtualization Everywhere - * Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/ + * Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/ * * 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 @@ -14,6 +14,14 @@ * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * -- + * + * You can be released from the requirements of the license by purchasing + * a commercial license. Buying such a license is mandatory as soon as you + * develop commercial closed-source software that incorporates or links + * directly against ZeroTier software without disclosing the source code + * of your own application. */ #include <stdint.h> @@ -328,10 +336,7 @@ OSXEthernetTap::OSXEthernetTap( char devpath[64],ethaddr[64],mtustr[32],metstr[32],nwids[32]; struct stat stattmp; - Utils::snprintf(nwids,sizeof(nwids),"%.16llx",nwid); - - if (mtu > 2800) - throw std::runtime_error("max tap MTU is 2800"); + OSUtils::ztsnprintf(nwids,sizeof(nwids),"%.16llx",nwid); Mutex::Lock _gl(globalTapCreateLock); @@ -386,13 +391,13 @@ OSXEthernetTap::OSXEthernetTap( // Open the first unused tap device if we didn't recall a previous one. if (!recalledDevice) { for(int i=0;i<64;++i) { - Utils::snprintf(devpath,sizeof(devpath),"/dev/zt%d",i); + OSUtils::ztsnprintf(devpath,sizeof(devpath),"/dev/zt%d",i); if (stat(devpath,&stattmp)) throw std::runtime_error("no more TAP devices available"); _fd = ::open(devpath,O_RDWR); if (_fd > 0) { char foo[16]; - Utils::snprintf(foo,sizeof(foo),"zt%d",i); + OSUtils::ztsnprintf(foo,sizeof(foo),"zt%d",i); _dev = foo; break; } @@ -408,9 +413,9 @@ OSXEthernetTap::OSXEthernetTap( } // Configure MAC address and MTU, bring interface up - Utils::snprintf(ethaddr,sizeof(ethaddr),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)mac[0],(int)mac[1],(int)mac[2],(int)mac[3],(int)mac[4],(int)mac[5]); - Utils::snprintf(mtustr,sizeof(mtustr),"%u",_mtu); - Utils::snprintf(metstr,sizeof(metstr),"%u",_metric); + OSUtils::ztsnprintf(ethaddr,sizeof(ethaddr),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)mac[0],(int)mac[1],(int)mac[2],(int)mac[3],(int)mac[4],(int)mac[5]); + OSUtils::ztsnprintf(mtustr,sizeof(mtustr),"%u",_mtu); + OSUtils::ztsnprintf(metstr,sizeof(metstr),"%u",_metric); long cpid = (long)vfork(); if (cpid == 0) { ::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"lladdr",ethaddr,"mtu",mtustr,"metric",metstr,"up",(const char *)0); @@ -494,7 +499,8 @@ bool OSXEthernetTap::addIp(const InetAddress &ip) long cpid = (long)vfork(); if (cpid == 0) { - ::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),(ip.ss_family == AF_INET6) ? "inet6" : "inet",ip.toString().c_str(),"alias",(const char *)0); + char tmp[128]; + ::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),(ip.ss_family == AF_INET6) ? "inet6" : "inet",ip.toString(tmp),"alias",(const char *)0); ::_exit(-1); } else if (cpid > 0) { int exitcode = -1; @@ -514,7 +520,8 @@ bool OSXEthernetTap::removeIp(const InetAddress &ip) if (*i == ip) { long cpid = (long)vfork(); if (cpid == 0) { - execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),(ip.ss_family == AF_INET6) ? "inet6" : "inet",ip.toIpString().c_str(),"-alias",(const char *)0); + char tmp[128]; + execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),(ip.ss_family == AF_INET6) ? "inet6" : "inet",ip.toIpString(tmp),"-alias",(const char *)0); _exit(-1); } else if (cpid > 0) { int exitcode = -1; @@ -566,7 +573,7 @@ std::vector<InetAddress> OSXEthernetTap::ips() const void OSXEthernetTap::put(const MAC &from,const MAC &to,unsigned int etherType,const void *data,unsigned int len) { - char putBuf[4096]; + char putBuf[ZT_MAX_MTU + 64]; if ((_fd > 0)&&(len <= _mtu)&&(_enabled)) { to.copyTo(putBuf,6); from.copyTo(putBuf + 6,6); @@ -624,13 +631,30 @@ void OSXEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,std: _multicastGroups.swap(newGroups); } +void OSXEthernetTap::setMtu(unsigned int mtu) +{ + if (mtu != _mtu) { + _mtu = mtu; + long cpid = (long)vfork(); + if (cpid == 0) { + char tmp[64]; + OSUtils::ztsnprintf(tmp,sizeof(tmp),"%u",mtu); + execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"mtu",tmp,(const char *)0); + _exit(-1); + } else if (cpid > 0) { + int exitcode = -1; + waitpid(cpid,&exitcode,0); + } + } +} + void OSXEthernetTap::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); |