fix

main.cpp

@@ -30,11 +30,15 @@ void inbound(int raw, int tun) {
     sockaddr_in address{.sin_family = AF_INET};
     socklen_t address_length;
     size_t packet_length;
-    while ((packet_length = recvfrom(raw, buffer, sizeof(buffer), 0, (sockaddr *) &address, &address_length)) >= 0) {
-//        std::cout << "received " << packet_length << " bytes from " << inet_ntoa(address.sin_addr) << std::endl;
+    while ((packet_length = recvfrom(raw, buffer, sizeof(buffer), 0, (sockaddr * ) & address, &address_length)) >= 0) {
         auto *packet = (iphdr *) buffer;
         auto overhead = packet->ihl * 4;
         auto payload = buffer + overhead;
+//        auto inner = (iphdr *) payload;
+//        std::cout << "packet_length " << packet_length
+//                  << " tot_len " << ntohs(packet->tot_len)
+//                  << " inner->tot_len " << ntohs(inner->tot_len)
+//                  << " from " << inet_ntoa(address.sin_addr) << std::endl;
         auto payload_length = packet_length - overhead;
         decrypt_package(payload, payload_length);
         if (write(tun, payload, payload_length) < 0) {
@@ -52,7 +56,7 @@ void outbound(int raw, int tun) {
     size_t packet_length;
     while ((packet_length = read(tun, buffer, sizeof(buffer))) >= 0) {
         encrypt_package(buffer, packet_length);
-        if (sendto(raw, buffer, packet_length, 0, (sockaddr *) &address, sizeof(address)) < 0) {
+        if (sendto(raw, buffer, packet_length, 0, (sockaddr * ) & address, sizeof(address)) < 0) {
             perror("outbound write");
         }
     }
@@ -82,7 +86,7 @@ int main(int argc, char *argv[]) {
     strncpy(ifr.ifr_name, args["dev"].as<std::string>().c_str(), IFNAMSIZ);
     remote = inet_addr(args["IP"].as<std::string>().c_str());
 
-    auto raw = socket(AF_INET, SOCK_RAW, IPPROTO_IPIP);
+    auto raw = socket(AF_INET, SOCK_RAW, 144);
     if (raw < 0) {
         perror("socket init error");
         return -1;