util: define virNetDevRxFilter and basic utility functions

This same structure will be used to retrieve RX filter info for
interfaces on the host via netlink messages, and RX filter info for
interfaces on the guest via the qemu "query-rx-filter" command.

src/libvirt_private.syms

@@ -1615,6 +1615,10 @@ virNetDevReplaceMacAddress;
 virNetDevReplaceNetConfig;
 virNetDevRestoreMacAddress;
 virNetDevRestoreNetConfig;
+virNetDevRxFilterFree;
+virNetDevRxFilterModeTypeFromString;
+virNetDevRxFilterModeTypeToString;
+virNetDevRxFilterNew;
 virNetDevSetIPv4Address;
 virNetDevSetMAC;
 virNetDevSetMTU;

src/util/virnetdev.c

@@ -1932,3 +1932,34 @@ virNetDevGetLinkInfo(const char *ifname,
     return 0;
 }
 #endif /* defined(__linux__) */
+
+
+VIR_ENUM_IMPL(virNetDevRxFilterMode,
+              VIR_NETDEV_RX_FILTER_MODE_LAST,
+              "none",
+              "normal",
+              "all");
+
+
+virNetDevRxFilterPtr
+virNetDevRxFilterNew(void)
+{
+    virNetDevRxFilterPtr filter;
+
+    if (VIR_ALLOC(filter) < 0)
+        return NULL;
+    return filter;
+}
+
+
+void
+virNetDevRxFilterFree(virNetDevRxFilterPtr filter)
+{
+    if (filter) {
+        VIR_FREE(filter->name);
+        VIR_FREE(filter->unicast.table);
+        VIR_FREE(filter->multicast.table);
+        VIR_FREE(filter->vlan.table);
+        VIR_FREE(filter);
+    }
+}

src/util/virnetdev.h

 /*
- * Copyright (C) 2007-2013 Red Hat, Inc.
+ * Copyright (C) 2007-2014 Red Hat, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -37,6 +37,42 @@ typedef struct ifreq virIfreq;
 typedef void virIfreq;
 # endif
 
+typedef enum {
+   VIR_NETDEV_RX_FILTER_MODE_NONE = 0,
+   VIR_NETDEV_RX_FILTER_MODE_NORMAL,
+   VIR_NETDEV_RX_FILTER_MODE_ALL,
+
+   VIR_NETDEV_RX_FILTER_MODE_LAST
+} virNetDevRxFilterMode;
+VIR_ENUM_DECL(virNetDevRxFilterMode)
+
+typedef struct _virNetDevRxFilter virNetDevRxFilter;
+typedef virNetDevRxFilter *virNetDevRxFilterPtr;
+struct _virNetDevRxFilter {
+    char *name; /* the alias used by qemu, *not* name used by guest */
+    virMacAddr mac;
+    bool promiscuous;
+    bool broadcastAllowed;
+
+    struct {
+        int mode; /* enum virNetDevRxFilterMode */
+        bool overflow;
+        virMacAddrPtr table;
+        size_t nTable;
+    } unicast;
+    struct {
+        int mode; /* enum virNetDevRxFilterMode */
+        bool overflow;
+        virMacAddrPtr table;
+        size_t nTable;
+    } multicast;
+    struct {
+        int mode; /* enum virNetDevRxFilterMode */
+        unsigned int *table;
+        size_t nTable;
+    } vlan;
+};
+
 int virNetDevSetupControl(const char *ifname,
                           virIfreq *ifr)
     ATTRIBUTE_RETURN_CHECK;
@@ -150,4 +186,8 @@ int virNetDevGetLinkInfo(const char *ifname,
                          virInterfaceLinkPtr lnk)
     ATTRIBUTE_NONNULL(1);
 
+virNetDevRxFilterPtr virNetDevRxFilterNew(void)
+   ATTRIBUTE_RETURN_CHECK;
+void virNetDevRxFilterFree(virNetDevRxFilterPtr filter);
+
 #endif /* __VIR_NETDEV_H__ */