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Now builds on OpenBSD, but segfaults. So not yet but close. GitHub issue #439

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This commit is contained in:
Adam Ierymenko 2017-01-19 10:39:42 -08:00
parent 13263b8401
commit 7b231b38b0
4 changed files with 31 additions and 11 deletions
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32
osdep/BSDEthernetTap.cpp
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@ -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)