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nicira-ext: Support matching ARP source and target hardware addresses.

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OpenFlow 1.0 doesn't allow matching on the ARP source and target
hardware address.  This has caused us to introduce hacks such as the
Drop Spoofed ARP action.  Now that we have extensible match, we can
match on more fields within ARP:

    - Source Hardware Address (arp_sha)
    - Target Hardware Address (arp_tha)

Signed-off-by: Justin Pettit <jpettit@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Justin Pettit
2010-12-07 14:02:17 -08:00
parent 6767a2cce9
commit bad68a9965
15 changed files with 177 additions and 27 deletions
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9
lib/ofp-util.c
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@@ -124,6 +124,10 @@ ofputil_cls_rule_from_match(const struct ofp_match *match,
/* Initialize most of rule->wc. */
flow_wildcards_init_catchall(wc);
wc->wildcards = ofpfw & WC_INVARIANTS;
/* Wildcard fields that aren't defined by ofp_match or tun_id. */
wc->wildcards |= (FWW_ARP_SHA | FWW_ARP_THA);
if (ofpfw & OFPFW_NW_TOS) {
wc->wildcards |= FWW_NW_TOS;
}
@@ -859,6 +863,11 @@ is_nxm_required(const struct cls_rule *rule, bool cookie_support,
return true;
}
/* Only NXM supports matching ARP hardware addresses. */
if (!(wc->wildcards & FWW_ARP_SHA) || !(wc->wildcards & FWW_ARP_THA)) {
return true;
}
/* Only NXM supports matching registers. */
if (!regs_fully_wildcarded(wc)) {
return true;