slirp: use a callback structure to interface with qemu

This will bring slirp a bit forward to the state of an independent
project.

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

1 files changed, 11 insertions, 2 deletions

diff --git a/slirp/libslirp.h b/slirp/libslirp.h
index 04b6db9f49..a5d1b27b5e 100644
--- a/slirp/libslirp.h
+++ b/slirp/libslirp.h
@@ -5,7 +5,16 @@
 
 typedef struct Slirp Slirp;
 
-typedef void (*slirp_output)(void *opaque, const uint8_t *pkt, int pkt_len);
+/*
+ * Callbacks from slirp
+ *
+ * The opaque parameter comes from the opaque parameter given to slirp_init().
+ */
+typedef struct SlirpCb {
+    /* Send an ethernet frame to the guest network.  */
+    void (*output)(void *opaque, const uint8_t *pkt, int pkt_len);
+} SlirpCb;
+
 
 Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork,
                   struct in_addr vnetmask, struct in_addr vhost,
@@ -17,7 +26,7 @@ Slirp *slirp_init(int restricted, bool in_enabled, struct in_addr vnetwork,
                   struct in_addr vdhcp_start, struct in_addr vnameserver,
                   struct in6_addr vnameserver6, const char **vdnssearch,
                   const char *vdomainname,
-                  slirp_output output,
+                  const SlirpCb *callbacks,
                   void *opaque);
 void slirp_cleanup(Slirp *slirp);