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Yank RuntimeEnvironment from SysEnv.

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This commit is contained in:
Adam Ierymenko 2014-01-29 09:58:17 -08:00
parent d6a346ca6e
commit 4e85213473
3 changed files with 18 additions and 18 deletions
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6
node/Node.cpp
View File

@ -447,7 +447,7 @@ Node::ReasonForTermination Node::run()
_r->sw = new Switch(_r);
_r->demarc = new Demarc(_r);
_r->topology = new Topology(_r,Utils::fileExists((_r->homePath + ZT_PATH_SEPARATOR_S + "iddb.d").c_str()));
_r->sysEnv = new SysEnv(_r);
_r->sysEnv = new SysEnv();
try {
_r->nc = new NodeConfig(_r,configAuthToken.c_str(),impl->controlPort);
} catch (std::exception &exc) {
@ -513,7 +513,7 @@ Node::ReasonForTermination Node::run()
uint64_t lastPingCheck = 0;
uint64_t lastClean = Utils::now(); // don't need to do this immediately
uint64_t lastNetworkFingerprintCheck = 0;
uint64_t networkConfigurationFingerprint = _r->sysEnv->getNetworkConfigurationFingerprint();
uint64_t networkConfigurationFingerprint = _r->sysEnv->getNetworkConfigurationFingerprint(_r->nc->networkTapDeviceNames());
uint64_t lastMulticastCheck = 0;
long lastDelayDelta = 0;
@ -538,7 +538,7 @@ Node::ReasonForTermination Node::run()
// If our network environment looks like it changed, also set resynchronize flag.
if ((resynchronize)||((now - lastNetworkFingerprintCheck) >= ZT_NETWORK_FINGERPRINT_CHECK_DELAY)) {
lastNetworkFingerprintCheck = now;
uint64_t fp = _r->sysEnv->getNetworkConfigurationFingerprint();
uint64_t fp = _r->sysEnv->getNetworkConfigurationFingerprint(_r->nc->networkTapDeviceNames());
if (fp != networkConfigurationFingerprint) {
LOG("netconf fingerprint change: %.16llx != %.16llx, resyncing with network",networkConfigurationFingerprint,fp);
networkConfigurationFingerprint = fp;

18
node/SysEnv.cpp
View File

@ -62,8 +62,7 @@
namespace ZeroTier {
SysEnv::SysEnv(const RuntimeEnvironment *renv) :
_r(renv)
SysEnv::SysEnv()
{
}
@ -73,7 +72,7 @@ SysEnv::~SysEnv()
#ifdef __APPLE__
uint64_t SysEnv::getNetworkConfigurationFingerprint()
uint64_t SysEnv::getNetworkConfigurationFingerprint(const std::set<std::string> &ignoreDevices)
{
int mib[6];
size_t needed;
@ -82,7 +81,8 @@ uint64_t SysEnv::getNetworkConfigurationFingerprint()
// Right now this just scans for changes in default routes. This is not
// totally robust -- it will miss cases where we switch from one 10.0.0.0/24
// network with gateway .1 to another -- but most of the time it'll pick
// up shifts in connectivity.
// up shifts in connectivity. Combined with sleep/wake detection this seems
// pretty solid so far on Mac for detecting when you change locations.
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
@ -139,15 +139,13 @@ uint64_t SysEnv::getNetworkConfigurationFingerprint()
#if defined(__linux__) || defined(linux) || defined(__LINUX__) || defined(__linux)
uint64_t SysEnv::getNetworkConfigurationFingerprint()
uint64_t SysEnv::getNetworkConfigurationFingerprint(const std::set<std::string> &ignoreDevices)
{
char buf[16384];
uint64_t fingerprint = 5381; // djb2 hash algorithm is used below
char *t1,*t2;
try {
std::set<std::string> tapDevs(_r->nc->networkTapDeviceNames());
// Include default IPv4 route if available
int fd = open("/proc/net/route",O_RDONLY);
if (fd > 0) {
@ -159,7 +157,7 @@ uint64_t SysEnv::getNetworkConfigurationFingerprint()
int fno = 0;
for(char *field=strtok_r(line," \t",&t2);(field);field=strtok_r((char *)0," \t",&t2)) {
if (fno == 0) { // device name
if ((tapDevs.count(std::string(field)))||(!strcmp(field,"lo")))
if ((ignoreDevices.count(std::string(field)))||(!strcmp(field,"lo")))
break;
} else if ((fno == 1)||(fno == 2)) { // destination, gateway
if (strlen(field) == 8) { // ignore header junk, use only hex route info
@ -198,7 +196,7 @@ uint64_t SysEnv::getNetworkConfigurationFingerprint()
}
if ((v6ip)&&(devname)) {
if ((!(tapDevs.count(std::string(devname))))&&(strcmp(devname,"lo"))) {
if ((!(ignoreDevices.count(std::string(devname))))&&(strcmp(devname,"lo"))) {
while (*v6ip)
fingerprint = ((fingerprint << 5) + fingerprint) + (uint64_t)*(v6ip++);
}
@ -215,7 +213,7 @@ uint64_t SysEnv::getNetworkConfigurationFingerprint()
#ifdef __WINDOWS__
uint64_t SysEnv::getNetworkConfigurationFingerprint()
uint64_t SysEnv::getNetworkConfigurationFingerprint(const std::set<std::string> &ignoreDevices)
{
// TODO: windows version
return 1;

12
node/SysEnv.hpp
View File

@ -30,6 +30,8 @@
#include <stdint.h>
#include <set>
#include "NonCopyable.hpp"
namespace ZeroTier {
@ -42,16 +44,16 @@ class RuntimeEnvironment;
class SysEnv : NonCopyable
{
public:
SysEnv(const RuntimeEnvironment *renv);
SysEnv();
~SysEnv();
/**
* This computes a CRC-type code from gathered information about your network settings
*
* @param ignoreDevices Ignore these local network devices by OS-specific name (e.g. our taps)
* @return Fingerprint of currently running network environment
*/
uint64_t getNetworkConfigurationFingerprint();
private:
const RuntimeEnvironment *_r;
uint64_t getNetworkConfigurationFingerprint(const std::set<std::string> &ignoreDevices);
};
} // namespace ZeroTier