meta-flow: Fix and simplify mf_get_mask().

This function can be implemented as a trivial wrapper around
mf_get_value(), which I hadn't noticed before, so it's better to do it
that way.  Also, examining the code that is removed, it had some bugs in
it (for example, all MFF_TUN_* fields were treated as if they were
MFF_TUN_ID) which mf_get_value() does not have, so this fixes bugs too.

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/lib/meta-flow.c b/lib/meta-flow.c
index 1dabf60..a967fa7 100644 (file)
--- a/lib/meta-flow.c
+++ b/lib/meta-flow.c
@@ -719,127 +719,7 @@ void
 mf_get_mask(const struct mf_field *mf, const struct flow_wildcards *wc,
             union mf_value *mask)
 {
-    switch (mf->id) {
-    case MFF_TUN_ID:
-    case MFF_TUN_SRC:
-    case MFF_TUN_DST:
-    case MFF_TUN_TOS:
-    case MFF_TUN_TTL:
-    case MFF_TUN_FLAGS:
-        mask->be64 = wc->masks.tunnel.tun_id;
-        break;
-    case MFF_METADATA:
-        mask->be64 = wc->masks.metadata;
-        break;
-    case MFF_IN_PORT:
-        mask->be16 = htons(wc->masks.in_port);
-        break;
-    CASE_MFF_REGS:
-        mask->be32 = htonl(wc->masks.regs[mf->id - MFF_REG0]);
-        break;
-
-    case MFF_ETH_DST:
-        memcpy(mask->mac, wc->masks.dl_dst, ETH_ADDR_LEN);
-        break;
-    case MFF_ETH_SRC:
-        memcpy(mask->mac, wc->masks.dl_src, ETH_ADDR_LEN);
-        break;
-    case MFF_ETH_TYPE:
-        mask->be16 = wc->masks.dl_type;
-        break;
-
-    case MFF_VLAN_TCI:
-        mask->be16 = wc->masks.vlan_tci;
-        break;
-    case MFF_DL_VLAN:
-        mask->be16 = wc->masks.vlan_tci & htons(VLAN_VID_MASK);
-        break;
-    case MFF_VLAN_VID:
-        mask->be16 = wc->masks.vlan_tci & htons(VLAN_VID_MASK | VLAN_CFI);
-        break;
-    case MFF_DL_VLAN_PCP:
-    case MFF_VLAN_PCP:
-        mask->u8 = vlan_tci_to_pcp(wc->masks.vlan_tci);
-        break;
-
-    case MFF_IPV4_SRC:
-        mask->be32 = wc->masks.nw_src;
-        break;
-    case MFF_IPV4_DST:
-        mask->be32 = wc->masks.nw_dst;
-        break;
-
-    case MFF_IPV6_SRC:
-        mask->ipv6 = wc->masks.ipv6_src;
-        break;
-    case MFF_IPV6_DST:
-        mask->ipv6 = wc->masks.ipv6_dst;
-        break;
-    case MFF_IPV6_LABEL:
-        mask->be32 = wc->masks.ipv6_label;
-        break;
-
-    case MFF_IP_PROTO:
-        mask->u8 = wc->masks.nw_proto;
-        break;
-    case MFF_IP_DSCP:
-        mask->u8 = wc->masks.nw_tos & IP_DSCP_MASK;
-        break;
-    case MFF_IP_ECN:
-        mask->u8 = wc->masks.nw_tos & IP_ECN_MASK;
-        break;
-
-    case MFF_ND_TARGET:
-        mask->ipv6 = wc->masks.nd_target;
-        break;
-
-    case MFF_IP_TTL:
-        mask->u8 = wc->masks.nw_ttl;
-        break;
-    case MFF_IP_FRAG:
-        mask->u8 = wc->masks.nw_frag & FLOW_NW_FRAG_MASK;
-        break;
-
-    case MFF_ARP_OP:
-        mask->u8 = wc->masks.nw_proto;
-        break;
-    case MFF_ARP_SPA:
-        mask->be32 = wc->masks.nw_src;
-        break;
-    case MFF_ARP_TPA:
-        mask->be32 = wc->masks.nw_dst;
-        break;
-    case MFF_ARP_SHA:
-    case MFF_ND_SLL:
-        memcpy(mask->mac, wc->masks.arp_sha, ETH_ADDR_LEN);
-        break;
-    case MFF_ARP_THA:
-    case MFF_ND_TLL:
-        memcpy(mask->mac, wc->masks.arp_tha, ETH_ADDR_LEN);
-        break;
-
-    case MFF_TCP_SRC:
-    case MFF_UDP_SRC:
-        mask->be16 = wc->masks.tp_src;
-        break;
-    case MFF_TCP_DST:
-    case MFF_UDP_DST:
-        mask->be16 = wc->masks.tp_dst;
-        break;
-
-    case MFF_ICMPV4_TYPE:
-    case MFF_ICMPV6_TYPE:
-        mask->u8 = ntohs(wc->masks.tp_src);
-        break;
-    case MFF_ICMPV4_CODE:
-    case MFF_ICMPV6_CODE:
-        mask->u8 = ntohs(wc->masks.tp_dst);
-        break;
-
-    case MFF_N_IDS:
-    default:
-        NOT_REACHED();
-    }
+    mf_get_value(mf, &wc->masks, mask);
 }
 
 /* Tests whether 'mask' is a valid wildcard bit pattern for 'mf'.  Returns true