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/*
* Copyright (c) 2017 NXP. All rights reserved.
*/
/* Copyright (c) 2017, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdlib.h>
#include <string.h>
#include <example_debug.h>
#include <odp.h>
#include <odp/helper/ipsec.h>
#include <odp/helper/ip.h>
#include <odp_ipsec_offload_cache.h>
/** Global pointer to ipsec_cache db */
ipsec_cache_t *ipsec_cache;
#define IPDEFTTL 64
void init_ipsec_cache(void)
{
odp_shm_t shm;
shm = odp_shm_reserve("shm_ipsec_cache",
sizeof(ipsec_cache_t),
ODP_CACHE_LINE_SIZE,
0);
ipsec_cache = odp_shm_addr(shm);
if (ipsec_cache == NULL)
EXAMPLE_ABORT("Error: shared mem alloc failed.\n");
memset(ipsec_cache, 0, sizeof(*ipsec_cache));
}
int create_ipsec_cache_entry(sa_db_entry_t *cipher_sa,
sa_db_entry_t *auth_sa,
tun_db_entry_t *tun,
odp_bool_t in,
odp_queue_t completionq)
{
odp_ipsec_sa_param_t sa_params;
ipsec_cache_entry_t *entry;
odp_ipsec_sa_t sa;
uint32_t src_ip, dst_ip;
odp_ipsec_sa_param_init(&sa_params);
/* Verify we have a good entry */
entry = &ipsec_cache->array[ipsec_cache->index];
if (MAX_DB <= ipsec_cache->index)
return -1;
/* Verify SA mode match in case of cipher&auth */
if (!tun) {
printf("\n TRANSPORT MODE not supported");
return -1;
}
/* Setup parameters and call ipsec library to create sa */
if (in) {
sa_params.dir = ODP_IPSEC_DIR_INBOUND;
sa_params.inbound.lookup_mode = ODP_IPSEC_LOOKUP_SPI;
} else {
sa_params.dir = ODP_IPSEC_DIR_OUTBOUND;
src_ip = odp_cpu_to_be_32(tun->tun_src_ip);
dst_ip = odp_cpu_to_be_32(tun->tun_dst_ip);
sa_params.outbound.tunnel.type = ODP_IPSEC_TUNNEL_IPV4;
sa_params.outbound.tunnel.ipv4.src_addr = &src_ip;
sa_params.outbound.tunnel.ipv4.dst_addr = &dst_ip;
sa_params.outbound.tunnel.ipv4.ttl = IPDEFTTL;
sa_params.outbound.tunnel.ipv4.dscp = 0;
sa_params.outbound.tunnel.ipv4.df = 1;
}
sa_params.dest_queue = completionq;
sa_params.mode = ODP_IPSEC_MODE_TUNNEL;
/* Cipher */
if (cipher_sa) {
sa_params.crypto.cipher_alg = cipher_sa->alg.u.cipher;
sa_params.crypto.cipher_key.data = cipher_sa->key.data;
sa_params.crypto.cipher_key.length = cipher_sa->key.length;
sa_params.spi = cipher_sa->spi;
} else {
sa_params.crypto.cipher_alg = ODP_CIPHER_ALG_NULL;
}
/* Auth */
if (auth_sa) {
sa_params.crypto.auth_alg = auth_sa->alg.u.auth;
sa_params.crypto.auth_key.data = auth_sa->key.data;
sa_params.crypto.auth_key.length = auth_sa->key.length;
} else {
sa_params.crypto.auth_alg = ODP_AUTH_ALG_NULL;
}
sa = odp_ipsec_sa_create(&sa_params);
if (sa == ODP_IPSEC_SA_INVALID)
return -1;
/* Copy selector IPs in cache entry*/
if (cipher_sa) {
entry->src_ip = cipher_sa->src_ip;
entry->dst_ip = cipher_sa->dst_ip;
} else if (auth_sa) {
entry->src_ip = auth_sa->src_ip;
entry->dst_ip = auth_sa->dst_ip;
}
/* Initialize state */
entry->sa = sa;
/* Add entry to the appropriate list */
ipsec_cache->index++;
if (in) {
entry->next = ipsec_cache->in_list;
ipsec_cache->in_list = entry;
} else {
entry->next = ipsec_cache->out_list;
ipsec_cache->out_list = entry;
}
return 0;
}
ipsec_cache_entry_t *find_ipsec_cache_entry_out(uint32_t src_ip,
uint32_t dst_ip)
{
ipsec_cache_entry_t *entry = ipsec_cache->out_list;
/* Look for a hit */
for (; NULL != entry; entry = entry->next) {
if ((entry->src_ip == src_ip) && (entry->dst_ip == dst_ip))
break;
}
return entry;
}
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