diff options
Diffstat (limited to 'example/ipsec_api/odp_ipsec_cache.c')
| -rw-r--r-- | example/ipsec_api/odp_ipsec_cache.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/example/ipsec_api/odp_ipsec_cache.c b/example/ipsec_api/odp_ipsec_cache.c new file mode 100644 index 000000000..827c9dce2 --- /dev/null +++ b/example/ipsec_api/odp_ipsec_cache.c @@ -0,0 +1,203 @@ +/* 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; +} |