Feedback packets now have correct sized buffer.

src/prrt/processes/data_receiver.c

@@ -60,13 +60,13 @@ bool send_feedback(const PrrtSocket *sock_ptr, struct sockaddr_in remote)
     memcpy((void *) &targetaddr.sin_addr, hp->h_addr_list[0], (size_t) hp->h_length);
 
     PrrtPacket *feedback_pkt_ptr = PrrtPacket_create_feedback_packet(0, 19, 4715, 7, 3, 50, 4, 6, 8, 9, 5, 1);
-    uint8_t buf[MAX_PAYLOAD_LENGTH];
-    memset(buf, 0, MAX_PAYLOAD_LENGTH);
     uint32_t length = PrrtPacket_size(feedback_pkt_ptr);
+    void *buf = calloc(1, length);
 
     check(PrrtPacket_encode(buf, MAX_PAYLOAD_LENGTH, feedback_pkt_ptr), "Buffer for encoding feedback is too small");
     check(sendto(sock_ptr->feedbackSocketFd, buf, length, 0, (struct sockaddr *) &targetaddr, sizeof(targetaddr)) ==
           length, "Sending feedback failed.");
+    free(buf);
 
     PrrtPacket_destroy(feedback_pkt_ptr);