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Newly broken out OSX tap driver builds now.

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This commit is contained in:
Adam Ierymenko 2014-07-31 15:13:48 -07:00
commit 526435859f
4 changed files with 28 additions and 21 deletions
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41
osnet/OSXEthernetTap.cpp
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@ -56,16 +56,17 @@
#include <netinet6/in6_var.h>
#include <netinet/in_var.h>
#include <netinet/icmp6.h>
#include <netinet6/nd6.h>
#include <ifaddrs.h>
// OSX compile fix... in6_var defines this in a struct which namespaces it for C++
// OSX compile fix... in6_var defines this in a struct which namespaces it for C++ ... why?!?
struct prf_ra {
u_char onlink : 1;
u_char autonomous : 1;
u_char reserved : 6;
} prf_ra;
#include <netinet6/nd6.h>
#include <ifaddrs.h>
// These are KERNEL_PRIVATE... why?
#ifndef SIOCAUTOCONF_START
#define SIOCAUTOCONF_START _IOWR('i', 132, struct in6_ifreq) /* accept rtadvd on this interface */
@ -309,40 +310,44 @@ static inline bool _setIpv6Stuff(const char *ifname,bool performNUD,bool acceptR
namespace ZeroTier {
// Only permit one tap to be opened concurrently across the entire process
static Mutex __tapCreateLock;
OSXEthernetTap::OSXEthernetTap(
const char *tryToGetDevice,
const MAC &mac,
unsigned int mtu,
unsigned int metric,
uint64_t nwid,
const char *desiredDevice,
const char *friendlyName,
void (*handler)(void *,const MAC &,const MAC &,unsigned int,const Buffer<4096> &),
void *arg)
throw(std::runtime_error) :
void *arg) :
EthernetTap("OSXEthernetTap",mac,mtu,metric),
_r(renv),
_handler(handler),
_arg(arg),
_mtu(mtu),
_metric(metric),
_fd(0),
_enabled(true)
{
static Mutex globalTapCreateLock;
char devpath[64],ethaddr[64],mtustr[32],metstr[32];
struct stat stattmp;
Mutex::Lock _l(__tapCreateLock); // create only one tap at a time, globally
Mutex::Lock _gl(globalTapCreateLock);
if (mtu > 2800)
throw std::runtime_error("max tap MTU is 2800");
if (stat("/dev/zt0",&stattmp))
throw std::runtime_error("/dev/zt# tap devices do not exist and unable to load kernel extension");
throw std::runtime_error("/dev/zt# tap devices do not exist");
// Try to reopen the last device we had, if we had one and it's still unused.
bool recalledDevice = false;
if ((tryToGetDevice)&&(tryToGetDevice[0])) {
Utils::snprintf(devpath,sizeof(devpath),"/dev/%s",tryToGetDevice);
if ((desiredDevice)&&(desiredDevice[0] == 'z')&&(desiredDevice[1] == 't')) {
if ((strchr(desiredDevice,'/'))||(strchr(desiredDevice,'.'))) // security sanity check
throw std::runtime_error("invalid desiredDevice parameter");
Utils::snprintf(devpath,sizeof(devpath),"/dev/%s",desiredDevice);
if (stat(devpath,&stattmp) == 0) {
_fd = ::open(devpath,O_RDWR);
if (_fd > 0) {
_dev = tryToGetDevice;
_dev = desiredDevice;
recalledDevice = true;
}
}
@ -350,7 +355,7 @@ OSXEthernetTap::OSXEthernetTap(
// Open the first unused tap device if we didn't recall a previous one.
if (!recalledDevice) {
for(int i=0;i<256;++i) {
for(int i=0;i<64;++i) {
Utils::snprintf(devpath,sizeof(devpath),"/dev/zt%d",i);
if (stat(devpath,&stattmp))
throw std::runtime_error("no more TAP devices available");
@ -375,7 +380,7 @@ OSXEthernetTap::OSXEthernetTap(
// Configure MAC address and MTU, bring interface up
Utils::snprintf(ethaddr,sizeof(ethaddr),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)mac[0],(int)mac[1],(int)mac[2],(int)mac[3],(int)mac[4],(int)mac[5]);
Utils::snprintf(mtustr,sizeof(mtustr),"%u",_mtu);
Utils::snprintf(metstr,sizeof(metstr),"%u",_metric)
Utils::snprintf(metstr,sizeof(metstr),"%u",_metric);
long cpid = (long)vfork();
if (cpid == 0) {
::execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"lladdr",ethaddr,"mtu",mtustr,"metric",metstr,"up",(const char *)0);
@ -425,7 +430,7 @@ static bool ___removeIp(const std::string &_dev,const InetAddress &ip)
if (cpid == 0) {
execl("/sbin/ifconfig","/sbin/ifconfig",_dev.c_str(),"inet",ip.toIpString().c_str(),"-alias",(const char *)0);
_exit(-1);
} else (cpid > 0) {
} else if (cpid > 0) {
int exitcode = -1;
waitpid(cpid,&exitcode,0);
return (exitcode == 0);