slirp: add callbacks for timer

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

net/slirp.c

@@ -168,10 +168,31 @@ static int64_t net_slirp_clock_get_ns(void)
     return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
 }
 
+static void *net_slirp_timer_new(SlirpTimerCb cb, void *opaque)
+{
+    return timer_new_full(NULL, QEMU_CLOCK_VIRTUAL,
+                          SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
+                          cb, opaque);
+}
+
+static void net_slirp_timer_free(void *timer)
+{
+    timer_del(timer);
+    timer_free(timer);
+}
+
+static void net_slirp_timer_mod(void *timer, int64_t expire_timer)
+{
+    timer_mod(timer, expire_timer);
+}
+
 static const SlirpCb slirp_cb = {
     .output = net_slirp_output,
     .guest_error = net_slirp_guest_error,
     .clock_get_ns = net_slirp_clock_get_ns,
+    .timer_new = net_slirp_timer_new,
+    .timer_free = net_slirp_timer_free,
+    .timer_mod = net_slirp_timer_mod,
 };
 
 static int net_slirp_init(NetClientState *peer, const char *model,

slirp/ip6_icmp.c

@@ -16,8 +16,9 @@
 static void ra_timer_handler(void *opaque)
 {
     Slirp *slirp = opaque;
-    timer_mod(slirp->ra_timer,
-              slirp->cb->clock_get_ns() / SCALE_MS + NDP_Interval);
+
+    slirp->cb->timer_mod(slirp->ra_timer,
+                         slirp->cb->clock_get_ns() / SCALE_MS + NDP_Interval);
     ndp_send_ra(slirp);
 }
 
@@ -27,11 +28,9 @@ void icmp6_init(Slirp *slirp)
         return;
     }
 
-    slirp->ra_timer = timer_new_full(NULL, QEMU_CLOCK_VIRTUAL,
-                                     SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
-                                     ra_timer_handler, slirp);
-    timer_mod(slirp->ra_timer,
-              slirp->cb->clock_get_ns() / SCALE_MS + NDP_Interval);
+    slirp->ra_timer = slirp->cb->timer_new(ra_timer_handler, slirp);
+    slirp->cb->timer_mod(slirp->ra_timer,
+                         slirp->cb->clock_get_ns() / SCALE_MS + NDP_Interval);
 }
 
 void icmp6_cleanup(Slirp *slirp)
@@ -40,8 +39,7 @@ void icmp6_cleanup(Slirp *slirp)
         return;
     }
 
-    timer_del(slirp->ra_timer);
-    timer_free(slirp->ra_timer);
+    slirp->cb->timer_free(slirp->ra_timer);
 }
 
 static void icmp6_send_echoreply(struct mbuf *m, Slirp *slirp, struct ip6 *ip,

slirp/libslirp.h

@@ -6,19 +6,27 @@
 typedef struct Slirp Slirp;
 
 typedef int (*SlirpWriteCb)(const void *buf, size_t len, void *opaque);
+typedef void (*SlirpTimerCb)(void *opaque);
 
 /*
  * 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.  */
+    /*
+     * Send an ethernet frame to the guest network. The opaque parameter
+     * is the one given to slirp_init().
+     */
     void (*output)(void *opaque, const uint8_t *pkt, int pkt_len);
     /* Print a message for an error due to guest misbehavior.  */
     void (*guest_error)(const char *msg);
     /* Return the virtual clock value in nanoseconds */
     int64_t (*clock_get_ns)(void);
+    /* Create a new timer with the given callback and opaque data */
+    void *(*timer_new)(SlirpTimerCb cb, void *opaque);
+    /* Remove and free a timer */
+    void (*timer_free)(void *timer);
+    /* Modify a timer to expire at @expire_time */
+    void (*timer_mod)(void *timer, int64_t expire_time);
 } SlirpCb;
 
 

slirp/slirp.h

@@ -193,7 +193,7 @@ struct Slirp {
     NdpTable ndp_table;
 
     GRand *grand;
-    QEMUTimer *ra_timer;
+    void *ra_timer;
 
     const SlirpCb *cb;
     void *opaque;