slirp: Cleanup resources on instance removal

Close & free sockets when shutting down a slirp instance, also release
all buffers.

CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/udp.c b/udp.c
index 38f3f55..2bceb08 100644
--- a/udp.c
+++ b/udp.c
@@ -48,6 +48,14 @@ void udp_init(Slirp *slirp)
     slirp->udb.so_next = slirp->udb.so_prev = &slirp->udb;
     slirp->udp_last_so = &slirp->udb;
 }
+
+void udp_cleanup(Slirp *slirp)
+{
+    while (slirp->udb.so_next != &slirp->udb) {
+        udp_detach(slirp->udb.so_next);
+    }
+}
+
 /* m->m_data  points at ip packet header
  * m->m_len   length ip packet
  * ip->ip_len length data (IPDU)