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Low-impact sanity check against GitHub issue #247 -- will likely prevent other weird recursions too.

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This commit is contained in:
Adam Ierymenko 2015-11-30 16:44:32 -08:00
parent be44b15eac
commit 944fdfb65e
1 changed files with 21 additions and 1 deletions
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22
service/OneService.cpp
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@ -340,6 +340,26 @@ public:
static BackgroundSoftwareUpdateChecker backgroundSoftwareUpdateChecker;
#endif // ZT_AUTO_UPDATE
static bool isBlacklistedLocalInterfaceForZeroTierTraffic(const char *ifn)
{
#if defined(__linux__) || defined(linux) || defined(__LINUX__) || defined(__linux)
if ((ifn[0] == 'l')&&(ifn[1] == 'o')) return true; // loopback
if ((ifn[0] == 'z')&&(ifn[1] == 't')) return true; // sanity check: zt#
if ((ifn[0] == 't')&&(ifn[1] == 'u')&&(ifn[2] == 'n')) return true; // tun# is probably an OpenVPN tunnel or similar
if ((ifn[0] == 't')&&(ifn[1] == 'a')&&(ifn[2] == 'p')) return true; // tap# is probably an OpenVPN tunnel or similar
#endif
#ifdef __APPLE__
if ((ifn[0] == 'l')&&(ifn[1] == 'o')) return true; // loopback
if ((ifn[0] == 'z')&&(ifn[1] == 't')) return true; // sanity check: zt#
if ((ifn[0] == 't')&&(ifn[1] == 'u')&&(ifn[2] == 'n')) return true; // tun# is probably an OpenVPN tunnel or similar
if ((ifn[0] == 't')&&(ifn[1] == 'a')&&(ifn[2] == 'p')) return true; // tap# is probably an OpenVPN tunnel or similar
if ((ifn[0] == 'u')&&(ifn[1] == 't')&&(ifn[2] == 'u')&&(ifn[3] == 'n')) return true; // ... as is utun#
#endif
return false;
}
static std::string _trimString(const std::string &s)
{
unsigned long end = (unsigned long)s.length();
@ -753,7 +773,7 @@ public:
if ((getifaddrs(&ifatbl) == 0)&&(ifatbl)) {
struct ifaddrs *ifa = ifatbl;
while (ifa) {
if ((ifa->ifa_name)&&(ifa->ifa_addr)) {
if ((ifa->ifa_name)&&(ifa->ifa_addr)&&(!isBlacklistedLocalInterfaceForZeroTierTraffic(ifa->ifa_name))) {
bool isZT = false;
for(std::vector<std::string>::const_iterator d(ztDevices.begin());d!=ztDevices.end();++d) {
if (*d == ifa->ifa_name) {