libslirp 4.7 introduces a CFI-friendly version of the .timer_new callback.
The new callback replaces the function pointer with an enum; invoking the
callback is done with a new function slirp_handle_timer.
Support the new API so that CFI can be made compatible with using a system
libslirp.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
net/slirp.c | 41 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 40 insertions(+), 1 deletion(-)
diff --git a/net/slirp.c b/net/slirp.c
index b3a92d6e38..57af42299d 100644
--- a/net/slirp.c
+++ b/net/slirp.c
@@ -184,10 +184,43 @@ static int64_t net_slirp_clock_get_ns(void *opaque)
return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
}
+typedef struct SlirpTimer SlirpTimer;
struct SlirpTimer {
QEMUTimer timer;
+#if SLIRP_CHECK_VERSION(4,7,0)
+ Slirp *slirp;
+ SlirpTimerId id;
+ void *cb_opaque;
+#endif
+};
+
+#if SLIRP_CHECK_VERSION(4,7,0)
+static void net_slirp_init_completed(Slirp *slirp, void *opaque)
+{
+ SlirpState *s = opaque;
+ s->slirp = slirp;
}
+static void net_slirp_timer_cb(void *opaque)
+{
+ SlirpTimer *t = opaque;
+ slirp_handle_timer(t->slirp, t->id, t->cb_opaque);
+}
+
+static void *net_slirp_timer_new_opaque(SlirpTimerId id,
+ void *cb_opaque, void *opaque)
+{
+ SlirpState *s = opaque;
+ SlirpTimer *t = g_new(SlirpTimer, 1);
+ t->slirp = s->slirp;
+ t->id = id;
+ t->cb_opaque = cb_opaque;
+ timer_init_full(&t->timer, NULL, QEMU_CLOCK_VIRTUAL,
+ SCALE_MS, QEMU_TIMER_ATTR_EXTERNAL,
+ net_slirp_timer_cb, t);
+ return t;
+}
+#else
static void *net_slirp_timer_new(SlirpTimerCb cb,
void *cb_opaque, void *opaque)
{
@@ -197,6 +230,7 @@ static void *net_slirp_timer_new(SlirpTimerCb cb,
cb, cb_opaque);
return t;
}
+#endif
static void net_slirp_timer_free(void *timer, void *opaque)
{
@@ -231,7 +265,12 @@ static const SlirpCb slirp_cb = {
.send_packet = net_slirp_send_packet,
.guest_error = net_slirp_guest_error,
.clock_get_ns = net_slirp_clock_get_ns,
+#if SLIRP_CHECK_VERSION(4,7,0)
+ .init_completed = net_slirp_init_completed,
+ .timer_new_opaque = net_slirp_timer_new_opaque,
+#else
.timer_new = net_slirp_timer_new,
+#endif
.timer_free = net_slirp_timer_free,
.timer_mod = net_slirp_timer_mod,
.register_poll_fd = net_slirp_register_poll_fd,
@@ -578,7 +617,7 @@ static int net_slirp_init(NetClientState *peer, const char *model,
s = DO_UPCAST(SlirpState, nc, nc);
- cfg.version = 3;
+ cfg.version = SLIRP_CHECK_VERSION(4,7,0) ? 4 : 3;
cfg.restricted = restricted;
cfg.in_enabled = ipv4;
cfg.vnetwork = net;
--
2.35.1