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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2014-2018 Linaro Limited
*/
/** @cond _ODP_HIDE_FROM_DOXYGEN_ */
#include <stdlib.h>
#include <string.h>
#include <odp_api.h>
#include <odp/helper/odph_api.h>
#include <odp_ipsec_cache.h>
/** Global pointer to ipsec_cache db */
ipsec_cache_t *ipsec_cache;
void init_ipsec_cache(void)
{
odp_shm_t shm;
int i;
shm = odp_shm_reserve("shm_ipsec_cache",
sizeof(ipsec_cache_t),
ODP_CACHE_LINE_SIZE,
0);
if (shm == ODP_SHM_INVALID) {
ODPH_ERR("Error: shared mem reserve failed.\n");
exit(EXIT_FAILURE);
}
ipsec_cache = odp_shm_addr(shm);
if (ipsec_cache == NULL) {
ODPH_ERR("Error: shared mem alloc failed.\n");
exit(EXIT_FAILURE);
}
memset(ipsec_cache, 0, sizeof(*ipsec_cache));
for (i = 0; i < MAX_DB; i++)
ipsec_cache->array[i].ipsec_sa = ODP_IPSEC_SA_INVALID;
}
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 param;
ipsec_cache_entry_t *entry;
odp_ipsec_sa_t ipsec_sa;
uint32_t tun_src_ip, tun_dst_ip;
sa_mode_t mode = IPSEC_SA_MODE_TRANSPORT;
/* Verify we have a good entry */
entry = &ipsec_cache->array[ipsec_cache->index];
if (MAX_DB <= ipsec_cache->index)
return -1;
odp_ipsec_sa_param_init(¶m);
param.dir = in ? ODP_IPSEC_DIR_INBOUND : ODP_IPSEC_DIR_OUTBOUND;
param.inbound.lookup_mode = in ? ODP_IPSEC_LOOKUP_SPI :
ODP_IPSEC_LOOKUP_DISABLED;
param.proto = cipher_sa ? ODP_IPSEC_ESP : ODP_IPSEC_AH;
param.mode = tun ? ODP_IPSEC_MODE_TUNNEL : ODP_IPSEC_MODE_TRANSPORT;
param.dest_queue = completionq;
/* Cipher */
if (cipher_sa) {
param.crypto.cipher_alg = cipher_sa->alg.u.cipher;
param.crypto.cipher_key.data = cipher_sa->key.data;
param.crypto.cipher_key.length = cipher_sa->key.length;
param.spi = cipher_sa->spi;
} else {
param.crypto.cipher_alg = ODP_CIPHER_ALG_NULL;
}
/* Auth */
if (auth_sa) {
param.crypto.auth_alg = auth_sa->alg.u.auth;
param.crypto.auth_key.data = auth_sa->key.data;
param.crypto.auth_key.length = auth_sa->key.length;
param.spi = auth_sa->spi;
} else {
param.crypto.auth_alg = ODP_AUTH_ALG_NULL;
}
if (ODP_IPSEC_MODE_TUNNEL == param.mode) {
tun_src_ip = odp_cpu_to_be_32(tun->tun_src_ip);
tun_dst_ip = odp_cpu_to_be_32(tun->tun_dst_ip);
param.outbound.tunnel.type = ODP_IPSEC_TUNNEL_IPV4;
param.outbound.tunnel.ipv4.src_addr = &tun_src_ip;
param.outbound.tunnel.ipv4.dst_addr = &tun_dst_ip;
}
ipsec_sa = odp_ipsec_sa_create(¶m);
if (ODP_IPSEC_SA_INVALID == ipsec_sa) {
ODPH_ERR("Error: SA creation failed\n");
exit(EXIT_FAILURE);
}
/* Copy remainder */
if (cipher_sa) {
entry->src_ip = cipher_sa->src_ip;
entry->dst_ip = cipher_sa->dst_ip;
entry->esp.alg = cipher_sa->alg.u.cipher;
entry->esp.spi = cipher_sa->spi;
entry->esp.block_len = cipher_sa->block_len;
entry->esp.iv_len = cipher_sa->iv_len;
memcpy(&entry->esp.key, &cipher_sa->key, sizeof(ipsec_key_t));
}
if (auth_sa) {
entry->src_ip = auth_sa->src_ip;
entry->dst_ip = auth_sa->dst_ip;
entry->ah.alg = auth_sa->alg.u.auth;
entry->ah.spi = auth_sa->spi;
entry->ah.icv_len = auth_sa->icv_len;
memcpy(&entry->ah.key, &auth_sa->key, sizeof(ipsec_key_t));
}
if (tun) {
entry->tun_src_ip = tun->tun_src_ip;
entry->tun_dst_ip = tun->tun_dst_ip;
mode = IPSEC_SA_MODE_TUNNEL;
}
entry->mode = mode;
/* 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;
}
entry->ipsec_sa = ipsec_sa;
return 0;
}
ipsec_cache_entry_t *find_ipsec_cache_entry_in(uint32_t src_ip,
uint32_t dst_ip,
odph_ahhdr_t *ah,
odph_esphdr_t *esp)
{
ipsec_cache_entry_t *entry = ipsec_cache->in_list;
/* Look for a hit */
for (; NULL != entry; entry = entry->next) {
if ((entry->src_ip != src_ip) || (entry->dst_ip != dst_ip))
if ((entry->tun_src_ip != src_ip) ||
(entry->tun_dst_ip != dst_ip))
continue;
if (ah &&
((!entry->ah.alg) ||
(entry->ah.spi != odp_be_to_cpu_32(ah->spi))))
continue;
if (esp &&
((!entry->esp.alg) ||
(entry->esp.spi != odp_be_to_cpu_32(esp->spi))))
continue;
break;
}
return entry;
}
ipsec_cache_entry_t *find_ipsec_cache_entry_out(uint32_t src_ip,
uint32_t dst_ip,
uint8_t proto ODP_UNUSED)
{
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;
}
int destroy_ipsec_cache(void)
{
ipsec_cache_entry_t *entry;
int i;
int ret = 0;
for (i = 0; i < MAX_DB; i++) {
entry = &ipsec_cache->array[i];
if (entry->ipsec_sa != ODP_IPSEC_SA_INVALID) {
ret += odp_ipsec_sa_disable(entry->ipsec_sa);
ret += odp_ipsec_sa_destroy(entry->ipsec_sa);
}
}
return ret;
}
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