slirp: make timeout local

Each slirp has its own time to caculate timeout.

Signed-off-by: Liu Ping Fan <pingfank@linux.vnet.ibm.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

slirp/slirp.c

@@ -40,8 +40,6 @@ static const uint8_t special_ethaddr[ETH_ALEN] = {
 static const uint8_t zero_ethaddr[ETH_ALEN] = { 0, 0, 0, 0, 0, 0 };
 
 u_int curtime;
-static u_int time_fasttimo, last_slowtimo;
-static int do_slowtimo;
 
 static QTAILQ_HEAD(slirp_instances, Slirp) slirp_instances =
     QTAILQ_HEAD_INITIALIZER(slirp_instances);
@@ -278,14 +276,13 @@ void slirp_pollfds_fill(GArray *pollfds)
     /*
      * First, TCP sockets
      */
-    do_slowtimo = 0;
 
     QTAILQ_FOREACH(slirp, &slirp_instances, entry) {
         /*
          * *_slowtimo needs calling if there are IP fragments
          * in the fragment queue, or there are TCP connections active
          */
-        do_slowtimo |= ((slirp->tcb.so_next != &slirp->tcb) ||
+        slirp->do_slowtimo = ((slirp->tcb.so_next != &slirp->tcb) ||
                 (&slirp->ipq.ip_link != slirp->ipq.ip_link.next));
 
         for (so = slirp->tcb.so_next; so != &slirp->tcb;
@@ -299,8 +296,9 @@ void slirp_pollfds_fill(GArray *pollfds)
             /*
              * See if we need a tcp_fasttimo
              */
-            if (time_fasttimo == 0 && so->so_tcpcb->t_flags & TF_DELACK) {
-                time_fasttimo = curtime; /* Flag when we want a fasttimo */
+            if (slirp->time_fasttimo == 0 &&
+                so->so_tcpcb->t_flags & TF_DELACK) {
+                slirp->time_fasttimo = curtime; /* Flag when want a fasttimo */
             }
 
             /*
@@ -381,7 +379,7 @@ void slirp_pollfds_fill(GArray *pollfds)
                     udp_detach(so);
                     continue;
                 } else {
-                    do_slowtimo = 1; /* Let socket expire */
+                    slirp->do_slowtimo = true; /* Let socket expire */
                 }
             }
 
@@ -422,7 +420,7 @@ void slirp_pollfds_fill(GArray *pollfds)
                     icmp_detach(so);
                     continue;
                 } else {
-                    do_slowtimo = 1; /* Let socket expire */
+                    slirp->do_slowtimo = true; /* Let socket expire */
                 }
             }
 
@@ -454,14 +452,14 @@ void slirp_pollfds_poll(GArray *pollfds, int select_error)
         /*
          * See if anything has timed out
          */
-        if (time_fasttimo && ((curtime - time_fasttimo) >= 2)) {
+        if (slirp->time_fasttimo && ((curtime - slirp->time_fasttimo) >= 2)) {
             tcp_fasttimo(slirp);
-            time_fasttimo = 0;
+            slirp->time_fasttimo = 0;
         }
-        if (do_slowtimo && ((curtime - last_slowtimo) >= 499)) {
+        if (slirp->do_slowtimo && ((curtime - slirp->last_slowtimo) >= 499)) {
             ip_slowtimo(slirp);
             tcp_slowtimo(slirp);
-            last_slowtimo = curtime;
+            slirp->last_slowtimo = curtime;
         }
 
         /*

slirp/slirp.h

@@ -203,6 +203,9 @@ bool arp_table_search(Slirp *slirp, uint32_t ip_addr,
 
 struct Slirp {
     QTAILQ_ENTRY(Slirp) entry;
+    u_int time_fasttimo;
+    u_int last_slowtimo;
+    bool do_slowtimo;
 
     /* virtual network configuration */
     struct in_addr vnetwork_addr;