net: do not depend on slirp internals

Only slirp/libslirp.h should be included.

Instead of using some slirp declarations and utility functions directly,
let's copy them in net/util.h.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

net/colo.h

@@ -15,10 +15,9 @@
 #ifndef QEMU_COLO_PROXY_H
 #define QEMU_COLO_PROXY_H
 
-#include "slirp/slirp.h"
 #include "qemu/jhash.h"
 #include "qemu/timer.h"
-#include "slirp/tcp.h"
+#include "net/eth.h"
 
 #define HASHTABLE_MAX_SIZE 16384
 
@@ -81,10 +80,10 @@ typedef struct Connection {
     /* the maximum of acknowledgement number in secondary_list queue */
     uint32_t sack;
     /* offset = secondary_seq - primary_seq */
-    tcp_seq  offset;
+    uint32_t  offset;
 
     int tcp_state; /* TCP FSM state */
-    tcp_seq fin_ack_seq; /* the seq of 'fin=1,ack=1' */
+    uint32_t fin_ack_seq; /* the seq of 'fin=1,ack=1' */
 } Connection;
 
 uint32_t connection_key_hash(const void *opaque);