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/* vim: set expandtab ts=4 sw=4: */
/*
* You may redistribute this program and/or modify it under the terms of
* the GNU General Public License as published by the Free Software Foundation,
* either version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "wire/Message.h"
#include "interface/TUNMessageType.h"
#include "wire/Ethernet.h"
#include <stdint.h>
#include <netinet/in.h>
/**
* OSX is broken and expects you to send the platform dependent
* address family type rather than the ethertype.
*/
void TUNMessageType_push(struct Message* message, uint16_t ethertype)
{
uint16_t afType = (ethertype == Ethernet_TYPE_IP6) ? AF_INET6 : AF_INET;
Message_shift(message, 4);
((uint16_t*) message->bytes)[0] = 0;
((uint16_t*) message->bytes)[1] = afType;
}
uint16_t TUNMessageType_pop(struct Message* message)
{
Message_shift(message, -4);
uint16_t afType = ((uint16_t*) message->bytes)[-1];
return (afType == AF_INET6) ? Ethernet_TYPE_IP6 : Ethernet_TYPE_IP4;
}
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