hs init recv logic, + fs send init ack (not tracking it yet)

ngc_ft1.cpp

@@ -300,6 +300,7 @@ static void _handle_FT1_INIT(
 	fprintf(stderr, "]\n");
 
 	// check if slot free ?
+	// did we allready ack this and the other side just did not see the ack?
 
 	NGC_FT1_recv_init_cb* fn_ptr = nullptr;
 	if (ngc_ext_ctx->ngc_ft1_ctx->cb_init.count(file_kind)) {
@@ -316,8 +317,19 @@ static void _handle_FT1_INIT(
 
 	if (accept_ft) {
 		// send ack
+		// - 1 byte packet id
+		// - 1 byte transfer_id
+		std::vector<uint8_t> pkg;
+		pkg.push_back(FT1_INIT_ACK);
+		pkg.push_back(transfer_id);
+
+		// lossless
+		tox_group_send_custom_private_packet(tox, group_number, peer_number, true, pkg.data(), pkg.size(), nullptr);
+
+		fprintf(stderr, "accepted init\n");
 	} else {
 		// TODO deny?
+		fprintf(stderr, "rejected init\n");
 	}
 }