diff --git a/libc/dns/include/resolv_cache.h b/libc/dns/include/resolv_cache.h
index 16f3e43..e049d95 100644
--- a/libc/dns/include/resolv_cache.h
+++ b/libc/dns/include/resolv_cache.h
@@ -32,11 +32,6 @@
 #include <sys/cdefs.h>
 
 struct __res_state;
-struct resolv_cache;  /* forward */
-
-/* Gets the cache for a network. Returned cache might be NULL. */
-__LIBC_HIDDEN__
-extern struct resolv_cache* __get_res_cache(unsigned netid);
 
 /* sets the name server addresses to the provided res_state structure. The
  * name servers are retrieved from the cache which is associated
@@ -53,7 +48,7 @@
 
 __LIBC_HIDDEN__
 extern ResolvCacheStatus
-_resolv_cache_lookup( struct resolv_cache*  cache,
+_resolv_cache_lookup( unsigned              netid,
                       const void*           query,
                       int                   querylen,
                       void*                 answer,
@@ -65,7 +60,7 @@
  */
 __LIBC_HIDDEN__
 extern void
-_resolv_cache_add( struct resolv_cache*  cache,
+_resolv_cache_add( unsigned              netid,
                    const void*           query,
                    int                   querylen,
                    const void*           answer,
@@ -74,7 +69,7 @@
 /* Notify the cache a request failed */
 __LIBC_HIDDEN__
 extern void
-_resolv_cache_query_failed( struct resolv_cache* cache,
+_resolv_cache_query_failed( unsigned     netid,
                    const void* query,
                    int         querylen);
 
diff --git a/libc/dns/include/resolv_netid.h b/libc/dns/include/resolv_netid.h
index 991a0bf..006a6c2 100644
--- a/libc/dns/include/resolv_netid.h
+++ b/libc/dns/include/resolv_netid.h
@@ -65,6 +65,9 @@
 /* flush the cache associated with a certain network */
 extern void _resolv_flush_cache_for_net(unsigned netid);
 
+/* delete the cache associated with a certain network */
+extern void _resolv_delete_cache_for_net(unsigned netid);
+
 __END_DECLS
 
 #endif /* _RESOLV_NETID_H */
diff --git a/libc/dns/resolv/res_cache.c b/libc/dns/resolv/res_cache.c
index 9df97cd..70e8340 100644
--- a/libc/dns/resolv/res_cache.c
+++ b/libc/dns/resolv/res_cache.c
@@ -1218,7 +1218,6 @@
     int              max_entries;
     int              num_entries;
     Entry            mru_list;
-    pthread_mutex_t  lock;
     int              last_id;
     Entry*           entries;
     PendingReqInfo   pending_requests;
@@ -1236,6 +1235,15 @@
 
 #define  HTABLE_VALID(x)  ((x) != NULL && (x) != HTABLE_DELETED)
 
+static pthread_once_t        _res_cache_once = PTHREAD_ONCE_INIT;
+static void _res_cache_init(void);
+
+// lock protecting everything in the _resolve_cache_info structs (next ptr, etc)
+static pthread_mutex_t _res_cache_list_lock;
+
+/* gets cache associated with a network, or NULL if none exists */
+static struct resolv_cache* _find_named_cache_locked(unsigned netid);
+
 static void
 _cache_flush_pending_requests_locked( struct resolv_cache* cache )
 {
@@ -1256,18 +1264,18 @@
     }
 }
 
-/* return 0 if no pending request is found matching the key
- * if a matching request is found the calling thread will wait
- * and return 1 when released */
+/* Return 0 if no pending request is found matching the key.
+ * If a matching request is found the calling thread will wait until
+ * the matching request completes, then update *cache and return 1. */
 static int
-_cache_check_pending_request_locked( struct resolv_cache* cache, Entry* key )
+_cache_check_pending_request_locked( struct resolv_cache** cache, Entry* key, unsigned netid )
 {
     struct pending_req_info *ri, *prev;
     int exist = 0;
 
-    if (cache && key) {
-        ri = cache->pending_requests.next;
-        prev = &cache->pending_requests;
+    if (*cache && key) {
+        ri = (*cache)->pending_requests.next;
+        prev = &(*cache)->pending_requests;
         while (ri) {
             if (ri->hash == key->hash) {
                 exist = 1;
@@ -1288,7 +1296,9 @@
             struct timespec ts = {0,0};
             XLOG("Waiting for previous request");
             ts.tv_sec = _time_now() + PENDING_REQUEST_TIMEOUT;
-            pthread_cond_timedwait(&ri->cond, &cache->lock, &ts);
+            pthread_cond_timedwait(&ri->cond, &_res_cache_list_lock, &ts);
+            /* Must update *cache as it could have been deleted. */
+            *cache = _find_named_cache_locked(netid);
         }
     }
 
@@ -1325,17 +1335,25 @@
 
 /* notify the cache that the query failed */
 void
-_resolv_cache_query_failed( struct resolv_cache* cache,
+_resolv_cache_query_failed( unsigned    netid,
                    const void* query,
                    int         querylen)
 {
     Entry    key[1];
+    Cache*   cache;
 
-    if (cache && entry_init_key(key, query, querylen)) {
-        pthread_mutex_lock(&cache->lock);
+    if (!entry_init_key(key, query, querylen))
+        return;
+
+    pthread_mutex_lock(&_res_cache_list_lock);
+
+    cache = _find_named_cache_locked(netid);
+
+    if (cache) {
         _cache_notify_waiting_tid_locked(cache, key);
-        pthread_mutex_unlock(&cache->lock);
     }
+
+    pthread_mutex_unlock(&_res_cache_list_lock);
 }
 
 static void
@@ -1391,7 +1409,6 @@
         cache->max_entries = _res_cache_get_max_entries();
         cache->entries = calloc(sizeof(*cache->entries), cache->max_entries);
         if (cache->entries) {
-            pthread_mutex_init( &cache->lock, NULL );
             cache->mru_list.mru_prev = cache->mru_list.mru_next = &cache->mru_list;
             XLOG("%s: cache created\n", __FUNCTION__);
         } else {
@@ -1586,7 +1603,7 @@
 }
 
 ResolvCacheStatus
-_resolv_cache_lookup( struct resolv_cache*  cache,
+_resolv_cache_lookup( unsigned              netid,
                       const void*           query,
                       int                   querylen,
                       void*                 answer,
@@ -1597,6 +1614,7 @@
     Entry**    lookup;
     Entry*     e;
     time_t     now;
+    Cache*     cache;
 
     ResolvCacheStatus  result = RESOLV_CACHE_NOTFOUND;
 
@@ -1609,7 +1627,14 @@
         return RESOLV_CACHE_UNSUPPORTED;
     }
     /* lookup cache */
-    pthread_mutex_lock( &cache->lock );
+    pthread_once(&_res_cache_once, _res_cache_init);
+    pthread_mutex_lock(&_res_cache_list_lock);
+
+    cache = _find_named_cache_locked(netid);
+    if (cache == NULL) {
+        result = RESOLV_CACHE_UNSUPPORTED;
+        goto Exit;
+    }
 
     /* see the description of _lookup_p to understand this.
      * the function always return a non-NULL pointer.
@@ -1621,7 +1646,7 @@
         XLOG( "NOT IN CACHE");
         // calling thread will wait if an outstanding request is found
         // that matching this query
-        if (!_cache_check_pending_request_locked(cache, key)) {
+        if (!_cache_check_pending_request_locked(&cache, key, netid) || cache == NULL) {
             goto Exit;
         } else {
             lookup = _cache_lookup_p(cache, key);
@@ -1662,13 +1687,13 @@
     result = RESOLV_CACHE_FOUND;
 
 Exit:
-    pthread_mutex_unlock( &cache->lock );
+    pthread_mutex_unlock(&_res_cache_list_lock);
     return result;
 }
 
 
 void
-_resolv_cache_add( struct resolv_cache*  cache,
+_resolv_cache_add( unsigned              netid,
                    const void*           query,
                    int                   querylen,
                    const void*           answer,
@@ -1678,6 +1703,7 @@
     Entry*   e;
     Entry**  lookup;
     u_long   ttl;
+    Cache*   cache = NULL;
 
     /* don't assume that the query has already been cached
      */
@@ -1686,7 +1712,12 @@
         return;
     }
 
-    pthread_mutex_lock( &cache->lock );
+    pthread_mutex_lock(&_res_cache_list_lock);
+
+    cache = _find_named_cache_locked(netid);
+    if (cache == NULL) {
+        goto Exit;
+    }
 
     XLOG( "%s: query:", __FUNCTION__ );
     XLOG_QUERY(query,querylen);
@@ -1732,8 +1763,10 @@
     _cache_dump_mru(cache);
 #endif
 Exit:
-    _cache_notify_waiting_tid_locked(cache, key);
-    pthread_mutex_unlock( &cache->lock );
+    if (cache != NULL) {
+      _cache_notify_waiting_tid_locked(cache, key);
+    }
+    pthread_mutex_unlock(&_res_cache_list_lock);
 }
 
 /****************************************************************************/
@@ -1744,20 +1777,13 @@
 /****************************************************************************/
 /****************************************************************************/
 
-static pthread_once_t        _res_cache_once = PTHREAD_ONCE_INIT;
-
 // Head of the list of caches.  Protected by _res_cache_list_lock.
 static struct resolv_cache_info _res_cache_list;
 
-// lock protecting everything in the _resolve_cache_info structs (next ptr, etc)
-static pthread_mutex_t _res_cache_list_lock;
-
 /* insert resolv_cache_info into the list of resolv_cache_infos */
 static void _insert_cache_info_locked(struct resolv_cache_info* cache_info);
 /* creates a resolv_cache_info */
 static struct resolv_cache_info* _create_cache_info( void );
-/* gets cache associated with a network, or NULL if none exists */
-static struct resolv_cache* _find_named_cache_locked(unsigned netid);
 /* gets a resolv_cache_info associated with a network, or NULL if not found */
 static struct resolv_cache_info* _find_cache_info_locked(unsigned netid);
 /* look up the named cache, and creates one if needed */
@@ -1785,22 +1811,6 @@
     pthread_mutex_init(&_res_cache_list_lock, NULL);
 }
 
-struct resolv_cache*
-__get_res_cache(unsigned netid)
-{
-    struct resolv_cache *cache;
-
-    pthread_once(&_res_cache_once, _res_cache_init);
-    pthread_mutex_lock(&_res_cache_list_lock);
-
-    /* Does NOT create a cache if it does not exist. */
-    cache = _find_named_cache_locked(netid);
-
-    pthread_mutex_unlock(&_res_cache_list_lock);
-    XLOG("%s: netid=%u, cache=%p\n", __FUNCTION__, netid, cache);
-    return cache;
-}
-
 static struct resolv_cache*
 _get_res_cache_for_net_locked(unsigned netid)
 {
@@ -1837,12 +1847,36 @@
 {
     struct resolv_cache* cache = _find_named_cache_locked(netid);
     if (cache) {
-        pthread_mutex_lock(&cache->lock);
         _cache_flush_locked(cache);
-        pthread_mutex_unlock(&cache->lock);
     }
 }
 
+void _resolv_delete_cache_for_net(unsigned netid)
+{
+    pthread_once(&_res_cache_once, _res_cache_init);
+    pthread_mutex_lock(&_res_cache_list_lock);
+
+    struct resolv_cache_info* prev_cache_info = &_res_cache_list;
+
+    while (prev_cache_info->next) {
+        struct resolv_cache_info* cache_info = prev_cache_info->next;
+
+        if (cache_info->netid == netid) {
+            prev_cache_info->next = cache_info->next;
+            _cache_flush_locked(cache_info->cache);
+            free(cache_info->cache->entries);
+            free(cache_info->cache);
+            _free_nameservers_locked(cache_info);
+            free(cache_info);
+            break;
+        }
+
+        prev_cache_info = prev_cache_info->next;
+    }
+
+    pthread_mutex_unlock(&_res_cache_list_lock);
+}
+
 static struct resolv_cache_info*
 _create_cache_info(void)
 {
diff --git a/libc/dns/resolv/res_send.c b/libc/dns/resolv/res_send.c
index 9b36f55..972e143 100644
--- a/libc/dns/resolv/res_send.c
+++ b/libc/dns/resolv/res_send.c
@@ -367,7 +367,6 @@
 	int gotsomewhere, terrno, try, v_circuit, resplen, ns, n;
 	char abuf[NI_MAXHOST];
 #if USE_RESOLV_CACHE
-        struct resolv_cache*  cache;
         ResolvCacheStatus     cache_status = RESOLV_CACHE_UNSUPPORTED;
 #endif
 
@@ -389,21 +388,17 @@
 	terrno = ETIMEDOUT;
 
 #if USE_RESOLV_CACHE
-	// get the cache associated with the network
-	cache = __get_res_cache(statp->netid);
-	if (cache != NULL) {
-		int  anslen = 0;
-		cache_status = _resolv_cache_lookup(
-				cache, buf, buflen,
-				ans, anssiz, &anslen);
+	int  anslen = 0;
+	cache_status = _resolv_cache_lookup(
+			statp->netid, buf, buflen,
+			ans, anssiz, &anslen);
 
-		if (cache_status == RESOLV_CACHE_FOUND) {
-			return anslen;
-		} else {
-			// had a cache miss for a known network, so populate the thread private
-			// data so the normal resolve path can do its thing
-			_resolv_populate_res_for_net(statp);
-		}
+	if (cache_status == RESOLV_CACHE_FOUND) {
+		return anslen;
+	} else if (cache_status != RESOLV_CACHE_UNSUPPORTED) {
+		// had a cache miss for a known network, so populate the thread private
+		// data so the normal resolve path can do its thing
+		_resolv_populate_res_for_net(statp);
 	}
 
 	if (statp->nscount == 0) {
@@ -602,7 +597,7 @@
 
 #if USE_RESOLV_CACHE
                 if (cache_status == RESOLV_CACHE_NOTFOUND) {
-                    _resolv_cache_add(cache, buf, buflen,
+                    _resolv_cache_add(statp->netid, buf, buflen,
                                       ans, resplen);
                 }
 #endif
@@ -658,13 +653,13 @@
 		errno = terrno;
 
 #if USE_RESOLV_CACHE
-        _resolv_cache_query_failed(cache, buf, buflen);
+        _resolv_cache_query_failed(statp->netid, buf, buflen);
 #endif
 
 	return (-1);
  fail:
 #if USE_RESOLV_CACHE
-	_resolv_cache_query_failed(cache, buf, buflen);
+	_resolv_cache_query_failed(statp->netid, buf, buflen);
 #endif
 	res_nclose(statp);
 	return (-1);