Import release 0.1.11

[secnet.git] / udp.c

diff --git a/udp.c b/udp.c
index 307a67a9f7d67cdb8dd42758040d3435e054d070..65208650f998a7cbc5f670a1d7114ae40adc677b 100644 (file)
--- a/udp.c
+++ b/udp.c
@@ -21,6 +21,7 @@
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include "util.h"
+#include "unaligned.h"
 
 static beforepoll_fn udp_beforepoll;
 static afterpoll_fn udp_afterpoll;
@@ -91,8 +92,17 @@ static void udp_afterpoll(void *state, struct pollfd *fds, int nfds,
                    }
                }
                if (!done) {
+                   uint32_t source,dest;
                    /* XXX manufacture and send NAK packet */
-                   Message(M_WARNING,"Need to send NAK\n");
+                   source=get_uint32(st->rbuf->start); /* Us */
+                   dest=get_uint32(st->rbuf->start+4); /* Them */
+                   Message(M_INFO,"udp (port %d): sending NAK\n",st->port);
+                   buffer_init(st->rbuf,0);
+                   buf_append_uint32(st->rbuf,dest);
+                   buf_append_uint32(st->rbuf,source);
+                   buf_append_uint32(st->rbuf,0); /* NAK is msg type 0 */
+                   sendto(st->fd, st->rbuf->start, st->rbuf->size, 0,
+                          (struct sockaddr *)&from, sizeof(from));
                    BUF_FREE(st->rbuf);
                }
                BUF_ASSERT_FREE(st->rbuf);