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nicira-ext: Support matching IPv6 Neighbor Discovery messages.

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IPv6 uses Neighbor Discovery messages in a similar manner to how IPv4
uses ARP.  This commit adds support for matching deeper into the
payloads of Neighbor Solicitation (NS) and Neighbor Advertisement (NA)
messages.  Currently, the matching fields include:

    - NS and NA Target (nd_target)
    - NS Source Link Layer Address (nd_sll)
    - NA Target Link Layer Address (nd_tll)

When defining IPv6 Neighbor Discovery rules, the Nicira Extensible Match
(NXM) extension to OVS must be used.

Signed-off-by: Justin Pettit <jpettit@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>
This commit is contained in:
Justin Pettit
2011-02-01 22:54:11 -08:00
parent d31f1109f1
commit 685a51a5b8
18 changed files with 468 additions and 33 deletions
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14
lib/flow.h
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@@ -54,19 +54,20 @@ struct flow {
uint8_t dl_dst[6]; /* Ethernet destination address. */
uint8_t nw_proto; /* IP protocol or low 8 bits of ARP opcode. */
uint8_t nw_tos; /* IP ToS (DSCP field, 6 bits). */
uint8_t arp_sha[6]; /* ARP source hardware address. */
uint8_t arp_tha[6]; /* ARP target hardware address. */
uint8_t arp_sha[6]; /* ARP/ND source hardware address. */
uint8_t arp_tha[6]; /* ARP/ND target hardware address. */
struct in6_addr ipv6_src; /* IPv6 source address. */
struct in6_addr ipv6_dst; /* IPv6 destination address. */
struct in6_addr nd_target; /* IPv6 neighbor discovery (ND) target. */
uint32_t reserved; /* Reserved for 64-bit packing. */
};
/* Assert that there are FLOW_SIG_SIZE bytes of significant data in "struct
* flow", followed by FLOW_PAD_SIZE bytes of padding. */
#define FLOW_SIG_SIZE (84 + FLOW_N_REGS * 4)
#define FLOW_SIG_SIZE (100 + FLOW_N_REGS * 4)
#define FLOW_PAD_SIZE 4
BUILD_ASSERT_DECL(offsetof(struct flow, ipv6_dst) == FLOW_SIG_SIZE - 16);
BUILD_ASSERT_DECL(sizeof(((struct flow *)0)->ipv6_dst) == 16);
BUILD_ASSERT_DECL(offsetof(struct flow, nd_target) == FLOW_SIG_SIZE - 16);
BUILD_ASSERT_DECL(sizeof(((struct flow *)0)->nd_target) == 16);
BUILD_ASSERT_DECL(sizeof(struct flow) == FLOW_SIG_SIZE + FLOW_PAD_SIZE);
int flow_extract(struct ofpbuf *, uint64_t tun_id, uint16_t in_port,
@@ -122,7 +123,8 @@ typedef unsigned int OVS_BITWISE flow_wildcards_t;
/* multicast bit only */
#define FWW_ARP_SHA ((OVS_FORCE flow_wildcards_t) (1 << 9))
#define FWW_ARP_THA ((OVS_FORCE flow_wildcards_t) (1 << 10))
#define FWW_ALL ((OVS_FORCE flow_wildcards_t) (((1 << 11)) - 1))
#define FWW_ND_TARGET ((OVS_FORCE flow_wildcards_t) (1 << 11))
#define FWW_ALL ((OVS_FORCE flow_wildcards_t) (((1 << 12)) - 1))
/* Information on wildcards for a flow, as a supplement to "struct flow".
*