diff options
Diffstat (limited to 'osdep')
| -rw-r--r-- | osdep/BSDEthernetTap.cpp | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/osdep/BSDEthernetTap.cpp b/osdep/BSDEthernetTap.cpp index e8d36c9c..463206f6 100644 --- a/osdep/BSDEthernetTap.cpp +++ b/osdep/BSDEthernetTap.cpp @@ -85,8 +85,14 @@ BSDEthernetTap::BSDEthernetTap( char devpath[64],ethaddr[64],mtustr[32],metstr[32],tmpdevname[32]; struct stat stattmp; - // On FreeBSD at least we can rename, so use nwid to generate a deterministic unique zt#### name using base32 - // As a result we don't use desiredDevice + Mutex::Lock _gl(globalTapCreateLock); + + if (mtu > 2800) + throw std::runtime_error("max tap MTU is 2800"); + +#ifdef __FreeBSD__ + /* FreeBSD allows long interface names and interface renaming */ + _dev = "zt"; _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 60) & 0x1f)]); _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 55) & 0x1f)]); @@ -102,13 +108,6 @@ BSDEthernetTap::BSDEthernetTap( _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 5) & 0x1f)]); _dev.push_back(ZT_BASE32_CHARS[(unsigned long)(nwid & 0x1f)]); - Mutex::Lock _gl(globalTapCreateLock); - - if (mtu > 2800) - throw std::runtime_error("max tap MTU is 2800"); - - // On BSD we create taps and they can have high numbers, so use ones starting - // at 9993 to not conflict with other stuff. Then we rename it to zt<base32 of nwid> std::vector<std::string> devFiles(OSUtils::listDirectory("/dev")); for(int i=9993;i<(9993+128);++i) { Utils::snprintf(tmpdevname,sizeof(tmpdevname),"tap%d",i); @@ -144,6 +143,19 @@ BSDEthernetTap::BSDEthernetTap( } } } +#else + /* Other BSDs like OpenBSD only have a limited number of tap devices that cannot be renamed */ + + for(int i=0;i<64;++i) { + Utils::snprintf(tmpdevname,sizeof(tmpdevname),"tap%d",i); + Utils::snprintf(devpath,sizeof(devpath),"/dev/%s",tmpdevname); + _fd = ::open(devpath,O_RDWR); + if (_fd > 0) { + _dev = tmpdevname; + break; + } + } +#endif if (_fd <= 0) throw std::runtime_error("unable to open TAP device or no more devices available"); @@ -325,6 +337,7 @@ void BSDEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,std: { std::vector<MulticastGroup> newGroups; +#ifndef __OpenBSD__ struct ifmaddrs *ifmap = (struct ifmaddrs *)0; if (!getifmaddrs(&ifmap)) { struct ifmaddrs *p = ifmap; @@ -339,6 +352,7 @@ void BSDEthernetTap::scanMulticastGroups(std::vector<MulticastGroup> &added,std: } freeifmaddrs(ifmap); } +#endif // __OpenBSD__ std::vector<InetAddress> allIps(ips()); for(std::vector<InetAddress>::iterator ip(allIps.begin());ip!=allIps.end();++ip) |