1 files changed, 51 insertions, 56 deletions

diff --git a/slirp/if.c b/slirp/if.c
index 2852396a4a..33f08e1151 100644
--- a/slirp/if.c
+++ b/slirp/if.c
@@ -8,8 +8,6 @@
 #include <slirp.h>
 #include "qemu-timer.h"
 
-#define ifs_init(ifm) ((ifm)->ifs_next = (ifm)->ifs_prev = (ifm))
-
 static void
 ifs_insque(struct mbuf *ifm, struct mbuf *ifmhead)
 {
@@ -151,73 +149,70 @@ diddit:
  * from the second session, then one packet from the third, then back
  * to the first, etc. etc.
  */
-void
-if_start(Slirp *slirp)
+void if_start(Slirp *slirp)
 {
     uint64_t now = qemu_get_clock_ns(rt_clock);
     int requeued = 0;
-	struct mbuf *ifm, *ifqt;
-
-	DEBUG_CALL("if_start");
+    bool from_batchq = false;
+    struct mbuf *ifm, *ifqt;
 
-	if (slirp->if_queued == 0)
-	   return; /* Nothing to do */
+    DEBUG_CALL("if_start");
 
- again:
+    while (slirp->if_queued) {
         /* check if we can really output */
         if (!slirp_can_output(slirp->opaque))
             return;
 
-	/*
-	 * See which queue to get next packet from
-	 * If there's something in the fastq, select it immediately
-	 */
-	if (slirp->if_fastq.ifq_next != &slirp->if_fastq) {
-		ifm = slirp->if_fastq.ifq_next;
-	} else {
-		/* Nothing on fastq, see if next_m is valid */
-		if (slirp->next_m != &slirp->if_batchq)
-		   ifm = slirp->next_m;
-		else
-		   ifm = slirp->if_batchq.ifq_next;
-
-		/* Set which packet to send on next iteration */
-		slirp->next_m = ifm->ifq_next;
-	}
-	/* Remove it from the queue */
-	ifqt = ifm->ifq_prev;
-	remque(ifm);
-	slirp->if_queued--;
-
-	/* If there are more packets for this session, re-queue them */
-	if (ifm->ifs_next != /* ifm->ifs_prev != */ ifm) {
-		insque(ifm->ifs_next, ifqt);
-		ifs_remque(ifm);
-	}
-
-	/* Update so_queued */
-	if (ifm->ifq_so) {
-		if (--ifm->ifq_so->so_queued == 0)
-		   /* If there's no more queued, reset nqueued */
-		   ifm->ifq_so->so_nqueued = 0;
-	}
-
-        if (ifm->expiration_date < now) {
-            /* Expired */
-            m_free(ifm);
+        /*
+         * See which queue to get next packet from
+         * If there's something in the fastq, select it immediately
+         */
+        if (slirp->if_fastq.ifq_next != &slirp->if_fastq) {
+            ifm = slirp->if_fastq.ifq_next;
         } else {
-            /* Encapsulate the packet for sending */
-            if (if_encap(slirp, ifm)) {
-                m_free(ifm);
+            /* Nothing on fastq, see if next_m is valid */
+            if (slirp->next_m != &slirp->if_batchq) {
+                ifm = slirp->next_m;
             } else {
-                /* re-queue */
-                insque(ifm, ifqt);
-                requeued++;
+                ifm = slirp->if_batchq.ifq_next;
             }
+
+            from_batchq = true;
         }
 
-	if (slirp->if_queued)
-	   goto again;
+        slirp->if_queued--;
+
+        /* Try to send packet unless it already expired */
+        if (ifm->expiration_date >= now && !if_encap(slirp, ifm)) {
+            /* Packet is delayed due to pending ARP resolution */
+            requeued++;
+            continue;
+        }
+
+        if (from_batchq) {
+            /* Set which packet to send on next iteration */
+            slirp->next_m = ifm->ifq_next;
+        }
+
+        /* Remove it from the queue */
+        ifqt = ifm->ifq_prev;
+        remque(ifm);
+
+        /* If there are more packets for this session, re-queue them */
+        if (ifm->ifs_next != ifm) {
+            insque(ifm->ifs_next, ifqt);
+            ifs_remque(ifm);
+        }
+
+        /* Update so_queued */
+        if (ifm->ifq_so && --ifm->ifq_so->so_queued == 0) {
+            /* If there's no more queued, reset nqueued */
+            ifm->ifq_so->so_nqueued = 0;
+        }
+
+        m_free(ifm);
+
+    }
 
-        slirp->if_queued = requeued;
+    slirp->if_queued = requeued;
 }