Added initial support for NDP (IPv6)

Following messages are now handled by PROX
- router_solicitation
- neighbour_solicitation
- router_advertisement
- neighbour_advertisement

The following parameters are supported (through the PROX config file)
- sub mode=ndp
	This will enable handling of router and neighbour solicitation
	and advertisement.
- local ipv6=xxxx:xxxx:xxxxx:xxxx:xxxx:xxxx:xxxx:xxxx
	This will configure the local IPv6 address of the port.
	This parameter is optional. If not specified, the local IPv6
	will be calculated from the EUI.
- global ipv6=xxxx:xxxx:xxxxx:xxxx:xxxx:xxxx:xxxx:xxxx
	This will configure the global IPv6 address of the port.
	This parameter is optional. If not specified, the global IPv6
	will be calculated from the EUI and the router prefix received
	from the router.
- ipv6 router=yes
	This will cause the core to behave as an IPv6 router
	i.e. it will generate Router Advertisement messages
	This is only useful in back to back cases, when no real
	IPv6 router is present in the setup.
- router prefix=xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx
	The router prefix usedin the router advertisement
	The prefix will be used by the node to build an IPv6 global
	address in cases none were configured.

"Unsollicited NA" parameter has been added within the core/task section.
If set to yes (Unsollicited NA=yes), then an unsollicited neighbour
Advertisement is sent at startup

A same core/task cannot support both l3 and ndp mode.

Those messages will be generated or handled when submode
is set to "ndp":
- neighbour sollicitation
- neighbour advertisement
- router sollicitation
- router advertisement

An example configuration is provided: config/ipv6.cfg in which
port 0 / core 1 plays the role of the generator and port 1 /
core 2 plays the role of the swap.

Change-Id: Id0ab32d384448b4cf767fb4a1c486fc023f4f395
Signed-off-by: Xavier Simonart <xavier.simonart@intel.com>

1 files changed, 22 insertions, 9 deletions

diff --git a/VNFs/DPPD-PROX/packet_utils.h b/VNFs/DPPD-PROX/packet_utils.h
index 0a1ef9d8..ca4d449c 100644
--- a/VNFs/DPPD-PROX/packet_utils.h
+++ b/VNFs/DPPD-PROX/packet_utils.h
@@ -1,5 +1,5 @@
 /*
-// Copyright (c) 2010-2017 Intel Corporation
+// Copyright (c) 2010-2020 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -29,9 +29,9 @@
 
 #define IP4(x) x & 0xff, (x >> 8) & 0xff, (x >> 16) & 0xff, x >> 24	// From Network (BE)
 enum {
-	SEND_MBUF_AND_ARP,
+	SEND_MBUF_AND_ARP_ND,
 	SEND_MBUF,
-	SEND_ARP,
+	SEND_ARP_ND,
 	DROP_MBUF
 };
 #define DEFAULT_ARP_TIMEOUT	(1000 * 3600 * 24 * 15)	// ~15 days = disabled by default
@@ -39,42 +39,50 @@ enum {
 
 struct task_base;
 struct task_args;
+struct task_master;
 struct arp_table {
-	uint64_t arp_update_time;
-	uint64_t arp_timeout;
+	uint64_t arp_ndp_retransmit_timeout;
+	uint64_t reachable_timeout;
 	uint32_t ip;
 	uint32_t nh;
 	prox_rte_ether_addr mac;
+	struct ipv6_addr ip6;
 };
 struct l3_base {
 	struct rte_ring *ctrl_plane_ring;
 	struct task_base *tmaster;
 	uint32_t flags;
 	uint32_t n_pkts;
+	uint32_t local_ipv4;
 	uint8_t reachable_port_id;
 	uint8_t core_id;
 	uint8_t task_id;
-	uint32_t arp_timeout;
-	uint32_t arp_update_time;
 	uint seed;
 	prox_next_hop_index_type nb_gws;
+	uint32_t arp_ndp_retransmit_timeout;
+	uint32_t reachable_timeout;
 	struct arp_table gw;
 	struct arp_table optimized_arp_table[4];
 	struct rte_hash *ip_hash;
+	struct rte_hash *ip6_hash;
 	struct arp_table *arp_table;
-	struct rte_mempool *arp_pool;
 	struct rte_lpm *ipv4_lpm;
 	struct arp_table *next_hops;
+	struct rte_mempool *arp_nd_pool;
+	struct ipv6_addr local_ipv6;
+	struct ipv6_addr global_ipv6;
+	uint8_t prefix_printed;
 };
 
 void task_init_l3(struct task_base *tbase, struct task_args *targ);
 void task_start_l3(struct task_base *tbase, struct task_args *targ);
 int write_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, uint32_t *ip_dst, uint64_t **time, uint64_t tsc);
+int write_ip6_dst_mac(struct task_base *tbase, struct rte_mbuf *mbuf, struct ipv6_addr *ip_dst);
 void task_set_gateway_ip(struct task_base *tbase, uint32_t ip);
 void task_set_local_ip(struct task_base *tbase, uint32_t ip);
 void handle_ctrl_plane_pkts(struct task_base *tbase, struct rte_mbuf **mbufs, uint16_t n_pkts);
 
-static inline void update_arp_update_time(struct l3_base *l3, uint64_t *ptr, uint32_t base)
+static inline void update_arp_ndp_retransmit_timeout(struct l3_base *l3, uint64_t *ptr, uint32_t base)
 {
 	// randomize timers - from 0.5 to 1.5 * configured time
 	const uint64_t hz = rte_get_tsc_hz();
@@ -82,4 +90,9 @@ static inline void update_arp_update_time(struct l3_base *l3, uint64_t *ptr, uin
 	uint64_t rand = 500 + (1000L * rand_r(&l3->seed)) / RAND_MAX;
 	*ptr = tsc + (base * rand / 1000) * hz / 1000;
 }
+static inline uint8_t get_port(struct rte_mbuf *mbuf)
+{
+        return mbuf->port;
+}
+
 #endif /* _PACKET_UTILS_H_ */