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@@ -91,35 +91,17 @@ NetBSDEthernetTap::NetBSDEthernetTap(
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char devpath[64],ethaddr[64],mtustr[32],metstr[32],tmpdevname[32];
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struct stat stattmp;
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- // On FreeBSD at least we can rename, so use nwid to generate a deterministic unique zt#### name using base32
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- // As a result we don't use desiredDevice
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- _dev = "zt";
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 60) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 55) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 50) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 45) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 40) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 35) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 30) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 25) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 20) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 15) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 10) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)((nwid >> 5) & 0x1f)]);
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- _dev.push_back(ZT_BASE32_CHARS[(unsigned long)(nwid & 0x1f)]);
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-
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Mutex::Lock _gl(globalTapCreateLock);
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if (mtu > 2800)
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throw std::runtime_error("max tap MTU is 2800");
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- // On NetBSD there are /dev/tap{0..3} pre-created and for a moment I will stick with only them
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+ // we can create /dev/tap*
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std::vector<std::string> devFiles(OSUtils::listDirectory("/dev"));
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-// for(int i=0;i<4;++i) {
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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 (std::find(devFiles.begin(),devFiles.end(),std::string(tmpdevname)) == devFiles.end()) {
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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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@@ -134,7 +116,9 @@ NetBSDEthernetTap::NetBSDEthernetTap(
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string tmp;
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sprintf((char*)tmp.c_str(), "%d", i);
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string minor = tmp.c_str();
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- ::execl("/sbin/mknod","/sbin/mknod",devpath,"c","169",minor.c_str(),(const char *)0); //major 169 => tap
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+ ::execl("/sbin/mknod","/sbin/mknod",devpath,"c","169",minor.c_str(),(const char *)0);
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+ // http://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/sys/conf/majors
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+ // major 169 => tap
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::_exit(-1);
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} else if (cpid > 0) {
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int exitcode = -1;
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@@ -146,25 +130,14 @@ NetBSDEthernetTap::NetBSDEthernetTap(
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_dev = tmpdevname;
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_fd = ::open( devpath,O_RDWR);
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if (!stat(devpath,&stattmp)) {
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- /*cpid = (long)vfork();
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- if (cpid == 0) {
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- ::execl("/sbin/ifconfig","/sbin/ifconfig",tmpdevname,"name",_dev.c_str(),(const char *)0);
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- ::_exit(-1);
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- } else if (cpid > 0) {
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- int exitcode = -1;
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- ::waitpid(cpid,&exitcode,0);
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- if (exitcode)
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- throw std::runtime_error("ifconfig rename operation failed");
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- } else throw std::runtime_error("fork() failed");*/
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-
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-
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if (_fd > 0)
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break;
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- //else throw std::runtime_error("unable to open created tap device ");
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+ else
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+ throw std::runtime_error("unable to open created tap device ");
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} else {
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throw std::runtime_error("cannot find /dev node for newly created tap device");
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}
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- //}
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+ }
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}
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if (_fd <= 0)
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