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Listen to tun and write back

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This commit is contained in:
Théophile Bastian 2020-06-03 14:54:26 +02:00
parent 53444e725c
commit 8ec3f20513
1 changed files with 21 additions and 2 deletions
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23
main.cpp
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@ -1,14 +1,33 @@
#include <cstdio>
#include <unistd.h>
#include <signal.h>
#include "TunDevice.hpp"
static const size_t BUFFER_SIZE = 1500;
static volatile bool stopped = false;
void stop_sig_handler(int signal) {
printf("Received signal %d. Stopping.\n", signal);
stopped = true;
}
int main(void) {
char read_buffer[BUFFER_SIZE];
signal(SIGINT, stop_sig_handler);
try {
TunDevice tun_dev("cvpn%d");
printf("Tunnel device opened: <%s>, fd <%d>.\nSleeping 10 seconds.\n",
printf("Tunnel device opened: <%s>, fd <%d>.\n",
tun_dev.get_dev_name().c_str(), tun_dev.get_fd());
sleep(10);
while(!stopped) {
size_t packet_size = tun_dev.read_packet(read_buffer, BUFFER_SIZE);
if(packet_size > 0) {
printf("Received packet of size %lu.\n", packet_size);
tun_dev.write_packet(read_buffer, packet_size);
}
}
printf("Shutting down.\n");
} catch(const TunDevice::InitializationError& exn) {
fprintf(stderr, "ERROR: %s\n", exn.what());