examples/ipsec-secgw/sa.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2016-2020 Intel Corporation
 */

/*
 * Security Associations
 */
#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip6.h>

#include <rte_memzone.h>
#include <rte_crypto.h>
#include <rte_security.h>
#include <rte_cryptodev.h>
#include <rte_byteorder.h>
#include <rte_errno.h>
#include <rte_ip.h>
#include <rte_udp.h>
#include <rte_random.h>
#include <rte_ethdev.h>
#include <rte_malloc.h>

#include "ipsec.h"
#include "esp.h"
#include "parser.h"
#include "sad.h"

#define IPDEFTTL 64

#define IP4_FULL_MASK (sizeof(((struct ip_addr *)NULL)->ip.ip4) * CHAR_BIT)

#define IP6_FULL_MASK (sizeof(((struct ip_addr *)NULL)->ip.ip6.ip6) * CHAR_BIT)

#define MBUF_NO_SEC_OFFLOAD(m) ((m->ol_flags & RTE_MBUF_F_RX_SEC_OFFLOAD) == 0)

struct supported_cipher_algo {
    const char *keyword;
    enum rte_crypto_cipher_algorithm algo;
    uint16_t iv_len;
    uint16_t block_size;
    uint16_t key_len;
};

struct supported_auth_algo {
    const char *keyword;
    enum rte_crypto_auth_algorithm algo;
    uint16_t iv_len;
    uint16_t digest_len;
    uint16_t key_len;
    uint8_t key_not_req;
};

struct supported_aead_algo {
    const char *keyword;
    enum rte_crypto_aead_algorithm algo;
    uint16_t iv_len;
    uint16_t block_size;
    uint16_t digest_len;
    uint16_t key_len;
    uint8_t aad_len;
};


const struct supported_cipher_algo cipher_algos[] = {
    {
        .keyword = "null",
        .algo = RTE_CRYPTO_CIPHER_NULL,
        .iv_len = 0,
        .block_size = 4,
        .key_len = 0
    },
    {
        .keyword = "aes-128-cbc",
        .algo = RTE_CRYPTO_CIPHER_AES_CBC,
        .iv_len = 16,
        .block_size = 16,
        .key_len = 16
    },
    {
        .keyword = "aes-192-cbc",
        .algo = RTE_CRYPTO_CIPHER_AES_CBC,
        .iv_len = 16,
        .block_size = 16,
        .key_len = 24
    },
    {
        .keyword = "aes-256-cbc",
        .algo = RTE_CRYPTO_CIPHER_AES_CBC,
        .iv_len = 16,
        .block_size = 16,
        .key_len = 32
    },
    {
        .keyword = "aes-128-ctr",
        .algo = RTE_CRYPTO_CIPHER_AES_CTR,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 20
    },
    {
        .keyword = "aes-192-ctr",
        .algo = RTE_CRYPTO_CIPHER_AES_CTR,
        .iv_len = 16,
        .block_size = 16,
        .key_len = 28
    },
    {
        .keyword = "aes-256-ctr",
        .algo = RTE_CRYPTO_CIPHER_AES_CTR,
        .iv_len = 16,
        .block_size = 16,
        .key_len = 36
    },
    {
        .keyword = "3des-cbc",
        .algo = RTE_CRYPTO_CIPHER_3DES_CBC,
        .iv_len = 8,
        .block_size = 8,
        .key_len = 24
    }
};

const struct supported_auth_algo auth_algos[] = {
    {
        .keyword = "null",
        .algo = RTE_CRYPTO_AUTH_NULL,
        .digest_len = 0,
        .key_len = 0,
        .key_not_req = 1
    },
    {
        .keyword = "sha1-hmac",
        .algo = RTE_CRYPTO_AUTH_SHA1_HMAC,
        .digest_len = 12,
        .key_len = 20
    },
    {
        .keyword = "sha256-hmac",
        .algo = RTE_CRYPTO_AUTH_SHA256_HMAC,
        .digest_len = 16,
        .key_len = 32
    },
    {
        .keyword = "sha384-hmac",
        .algo = RTE_CRYPTO_AUTH_SHA384_HMAC,
        .digest_len = 24,
        .key_len = 48
    },
    {
        .keyword = "sha512-hmac",
        .algo = RTE_CRYPTO_AUTH_SHA512_HMAC,
        .digest_len = 32,
        .key_len = 64
    },
    {
        .keyword = "aes-gmac",
        .algo = RTE_CRYPTO_AUTH_AES_GMAC,
        .iv_len = 8,
        .digest_len = 16,
        .key_len = 20
    },
    {
        .keyword = "aes-xcbc-mac-96",
        .algo = RTE_CRYPTO_AUTH_AES_XCBC_MAC,
        .digest_len = 12,
        .key_len = 16
    }
};

const struct supported_aead_algo aead_algos[] = {
    {
        .keyword = "aes-128-gcm",
        .algo = RTE_CRYPTO_AEAD_AES_GCM,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 20,
        .digest_len = 16,
        .aad_len = 8,
    },
    {
        .keyword = "aes-192-gcm",
        .algo = RTE_CRYPTO_AEAD_AES_GCM,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 28,
        .digest_len = 16,
        .aad_len = 8,
    },
    {
        .keyword = "aes-256-gcm",
        .algo = RTE_CRYPTO_AEAD_AES_GCM,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 36,
        .digest_len = 16,
        .aad_len = 8,
    },
    {
        .keyword = "aes-128-ccm",
        .algo = RTE_CRYPTO_AEAD_AES_CCM,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 20,
        .digest_len = 16,
        .aad_len = 8,
    },
    {
        .keyword = "aes-192-ccm",
        .algo = RTE_CRYPTO_AEAD_AES_CCM,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 28,
        .digest_len = 16,
        .aad_len = 8,
    },
    {
        .keyword = "aes-256-ccm",
        .algo = RTE_CRYPTO_AEAD_AES_CCM,
        .iv_len = 8,
        .block_size = 4,
        .key_len = 36,
        .digest_len = 16,
        .aad_len = 8,
    },
    {
        .keyword = "chacha20-poly1305",
        .algo = RTE_CRYPTO_AEAD_CHACHA20_POLY1305,
        .iv_len = 12,
        .block_size = 64,
        .key_len = 36,
        .digest_len = 16,
        .aad_len = 8,
    }
};

#define SA_INIT_NB  128

static uint32_t nb_crypto_sessions;
struct ipsec_sa *sa_out;
uint32_t nb_sa_out;
static uint32_t sa_out_sz;
static struct ipsec_sa_cnt sa_out_cnt;

struct ipsec_sa *sa_in;
uint32_t nb_sa_in;
static uint32_t sa_in_sz;
static struct ipsec_sa_cnt sa_in_cnt;

static const struct supported_cipher_algo *
find_match_cipher_algo(const char *cipher_keyword)
{
    size_t i;

    for (i = 0; i < RTE_DIM(cipher_algos); i++) {
        const struct supported_cipher_algo *algo =
            &cipher_algos[i];

        if (strcmp(cipher_keyword, algo->keyword) == 0)
            return algo;
    }

    return NULL;
}

static const struct supported_auth_algo *
find_match_auth_algo(const char *auth_keyword)
{
    size_t i;

    for (i = 0; i < RTE_DIM(auth_algos); i++) {
        const struct supported_auth_algo *algo =
            &auth_algos[i];

        if (strcmp(auth_keyword, algo->keyword) == 0)
            return algo;
    }

    return NULL;
}

static const struct supported_aead_algo *
find_match_aead_algo(const char *aead_keyword)
{
    size_t i;

    for (i = 0; i < RTE_DIM(aead_algos); i++) {
        const struct supported_aead_algo *algo =
            &aead_algos[i];

        if (strcmp(aead_keyword, algo->keyword) == 0)
            return algo;
    }

    return NULL;
}

static uint32_t
parse_key_string(const char *key_str, uint8_t *key)
{
    const char *pt_start = key_str, *pt_end = key_str;
    uint32_t nb_bytes = 0;

    while (pt_end != NULL) {
        char sub_str[3] = {0};

        pt_end = strchr(pt_start, ':');

        if (pt_end == NULL) {
            if (strlen(pt_start) > 2)
                return 0;
            strncpy(sub_str, pt_start, 2);
        } else {
            if (pt_end - pt_start > 2)
                return 0;

            strncpy(sub_str, pt_start, pt_end - pt_start);
            pt_start = pt_end + 1;
        }

        key[nb_bytes++] = strtol(sub_str, NULL, 16);
    }

    return nb_bytes;
}

static int
extend_sa_arr(struct ipsec_sa **sa_tbl, uint32_t cur_cnt, uint32_t *cur_sz)
{
    if (*sa_tbl == NULL) {
        *sa_tbl = calloc(SA_INIT_NB, sizeof(struct ipsec_sa));
        if (*sa_tbl == NULL)
            return -1;
        *cur_sz = SA_INIT_NB;
        return 0;
    }

    if (cur_cnt >= *cur_sz) {
        *sa_tbl = realloc(*sa_tbl,
            *cur_sz * sizeof(struct ipsec_sa) * 2);
        if (*sa_tbl == NULL)
            return -1;
        /* clean reallocated extra space */
        memset(&(*sa_tbl)[*cur_sz], 0,
            *cur_sz * sizeof(struct ipsec_sa));
        *cur_sz *= 2;
    }

    return 0;
}

void
parse_sa_tokens(char **tokens, uint32_t n_tokens,
    struct parse_status *status)
{
    struct ipsec_sa *rule = NULL;
    struct rte_ipsec_session *ips;
    uint32_t ti; /*token index*/
    uint32_t *ri /*rule index*/;
    struct ipsec_sa_cnt *sa_cnt;
    uint32_t cipher_algo_p = 0;
    uint32_t auth_algo_p = 0;
    uint32_t aead_algo_p = 0;
    uint32_t src_p = 0;
    uint32_t dst_p = 0;
    uint32_t mode_p = 0;
    uint32_t type_p = 0;
    uint32_t portid_p = 0;
    uint32_t fallback_p = 0;
    int16_t status_p = 0;
    uint16_t udp_encap_p = 0;

    if (strcmp(tokens[0], "in") == 0) {
        ri = &nb_sa_in;
        sa_cnt = &sa_in_cnt;
        if (extend_sa_arr(&sa_in, nb_sa_in, &sa_in_sz) < 0)
            return;
        rule = &sa_in[*ri];
        rule->direction = RTE_SECURITY_IPSEC_SA_DIR_INGRESS;
    } else {
        ri = &nb_sa_out;
        sa_cnt = &sa_out_cnt;
        if (extend_sa_arr(&sa_out, nb_sa_out, &sa_out_sz) < 0)
            return;
        rule = &sa_out[*ri];
        rule->direction = RTE_SECURITY_IPSEC_SA_DIR_EGRESS;
    }

    /* spi number */
    APP_CHECK_TOKEN_IS_NUM(tokens, 1, status);
    if (status->status < 0)
        return;
    if (atoi(tokens[1]) == INVALID_SPI)
        return;
    rule->flags = 0;
    rule->spi = atoi(tokens[1]);
    rule->portid = UINT16_MAX;
    ips = ipsec_get_primary_session(rule);

    for (ti = 2; ti < n_tokens; ti++) {
        if (strcmp(tokens[ti], "mode") == 0) {
            APP_CHECK_PRESENCE(mode_p, tokens[ti], status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            if (strcmp(tokens[ti], "ipv4-tunnel") == 0) {
                sa_cnt->nb_v4++;
                rule->flags |= IP4_TUNNEL;
            } else if (strcmp(tokens[ti], "ipv6-tunnel") == 0) {
                sa_cnt->nb_v6++;
                rule->flags |= IP6_TUNNEL;
            } else if (strcmp(tokens[ti], "transport") == 0) {
                sa_cnt->nb_v4++;
                sa_cnt->nb_v6++;
                rule->flags |= TRANSPORT;
            } else {
                APP_CHECK(0, status, "unrecognized "
                    "input \"%s\"", tokens[ti]);
                return;
            }

            mode_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "telemetry") == 0) {
            rule->flags |= SA_TELEMETRY_ENABLE;
            continue;
        }

        if (strcmp(tokens[ti], "cipher_algo") == 0) {
            const struct supported_cipher_algo *algo;
            uint32_t key_len;

            APP_CHECK_PRESENCE(cipher_algo_p, tokens[ti],
                status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            algo = find_match_cipher_algo(tokens[ti]);

            APP_CHECK(algo != NULL, status, "unrecognized "
                "input \"%s\"", tokens[ti]);

            if (status->status < 0)
                return;

            rule->cipher_algo = algo->algo;
            rule->block_size = algo->block_size;
            rule->iv_len = algo->iv_len;
            rule->cipher_key_len = algo->key_len;

            /* for NULL algorithm, no cipher key required */
            if (rule->cipher_algo == RTE_CRYPTO_CIPHER_NULL) {
                cipher_algo_p = 1;
                continue;
            }

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            APP_CHECK(strcmp(tokens[ti], "cipher_key") == 0,
                status, "unrecognized input \"%s\", "
                "expect \"cipher_key\"", tokens[ti]);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            key_len = parse_key_string(tokens[ti],
                rule->cipher_key);
            APP_CHECK(key_len == rule->cipher_key_len, status,
                "unrecognized input \"%s\"", tokens[ti]);
            if (status->status < 0)
                return;

            if (algo->algo == RTE_CRYPTO_CIPHER_AES_CBC ||
                algo->algo == RTE_CRYPTO_CIPHER_3DES_CBC)
                rule->salt = (uint32_t)rte_rand();

            if (algo->algo == RTE_CRYPTO_CIPHER_AES_CTR) {
                key_len -= 4;
                rule->cipher_key_len = key_len;
                memcpy(&rule->salt,
                    &rule->cipher_key[key_len], 4);
            }

            cipher_algo_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "auth_algo") == 0) {
            const struct supported_auth_algo *algo;
            uint32_t key_len;

            APP_CHECK_PRESENCE(auth_algo_p, tokens[ti],
                status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            algo = find_match_auth_algo(tokens[ti]);
            APP_CHECK(algo != NULL, status, "unrecognized "
                "input \"%s\"", tokens[ti]);

            if (status->status < 0)
                return;

            rule->auth_algo = algo->algo;
            rule->auth_key_len = algo->key_len;
            rule->digest_len = algo->digest_len;

            /* NULL algorithm and combined algos do not
             * require auth key
             */
            if (algo->key_not_req) {
                auth_algo_p = 1;
                continue;
            }

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            APP_CHECK(strcmp(tokens[ti], "auth_key") == 0,
                status, "unrecognized input \"%s\", "
                "expect \"auth_key\"", tokens[ti]);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            key_len = parse_key_string(tokens[ti],
                rule->auth_key);
            APP_CHECK(key_len == rule->auth_key_len, status,
                "unrecognized input \"%s\"", tokens[ti]);
            if (status->status < 0)
                return;

            if (algo->algo == RTE_CRYPTO_AUTH_AES_GMAC) {
                key_len -= 4;
                rule->auth_key_len = key_len;
                rule->iv_len = algo->iv_len;
                memcpy(&rule->salt,
                    &rule->auth_key[key_len], 4);
            }

            auth_algo_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "aead_algo") == 0) {
            const struct supported_aead_algo *algo;
            uint32_t key_len;

            APP_CHECK_PRESENCE(aead_algo_p, tokens[ti],
                status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            algo = find_match_aead_algo(tokens[ti]);

            APP_CHECK(algo != NULL, status, "unrecognized "
                "input \"%s\"", tokens[ti]);

            if (status->status < 0)
                return;

            rule->aead_algo = algo->algo;
            rule->cipher_key_len = algo->key_len;
            rule->digest_len = algo->digest_len;
            rule->aad_len = algo->aad_len;
            rule->block_size = algo->block_size;
            rule->iv_len = algo->iv_len;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            APP_CHECK(strcmp(tokens[ti], "aead_key") == 0,
                status, "unrecognized input \"%s\", "
                "expect \"aead_key\"", tokens[ti]);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            key_len = parse_key_string(tokens[ti],
                rule->cipher_key);
            APP_CHECK(key_len == rule->cipher_key_len, status,
                "unrecognized input \"%s\"", tokens[ti]);
            if (status->status < 0)
                return;

            key_len -= 4;
            rule->cipher_key_len = key_len;
            memcpy(&rule->salt,
                &rule->cipher_key[key_len], 4);

            aead_algo_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "src") == 0) {
            APP_CHECK_PRESENCE(src_p, tokens[ti], status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            if (IS_IP4_TUNNEL(rule->flags)) {
                struct in_addr ip;

                APP_CHECK(parse_ipv4_addr(tokens[ti],
                    &ip, NULL) == 0, status,
                    "unrecognized input \"%s\", "
                    "expect valid ipv4 addr",
                    tokens[ti]);
                if (status->status < 0)
                    return;
                rule->src.ip.ip4 = rte_bswap32(
                    (uint32_t)ip.s_addr);
            } else if (IS_IP6_TUNNEL(rule->flags)) {
                struct in6_addr ip;

                APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
                    NULL) == 0, status,
                    "unrecognized input \"%s\", "
                    "expect valid ipv6 addr",
                    tokens[ti]);
                if (status->status < 0)
                    return;
                memcpy(rule->src.ip.ip6.ip6_b,
                    ip.s6_addr, 16);
            } else if (IS_TRANSPORT(rule->flags)) {
                APP_CHECK(0, status, "unrecognized input "
                    "\"%s\"", tokens[ti]);
                return;
            }

            src_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "dst") == 0) {
            APP_CHECK_PRESENCE(dst_p, tokens[ti], status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            if (IS_IP4_TUNNEL(rule->flags)) {
                struct in_addr ip;

                APP_CHECK(parse_ipv4_addr(tokens[ti],
                    &ip, NULL) == 0, status,
                    "unrecognized input \"%s\", "
                    "expect valid ipv4 addr",
                    tokens[ti]);
                if (status->status < 0)
                    return;
                rule->dst.ip.ip4 = rte_bswap32(
                    (uint32_t)ip.s_addr);
            } else if (IS_IP6_TUNNEL(rule->flags)) {
                struct in6_addr ip;

                APP_CHECK(parse_ipv6_addr(tokens[ti], &ip,
                    NULL) == 0, status,
                    "unrecognized input \"%s\", "
                    "expect valid ipv6 addr",
                    tokens[ti]);
                if (status->status < 0)
                    return;
                memcpy(rule->dst.ip.ip6.ip6_b, ip.s6_addr, 16);
            } else if (IS_TRANSPORT(rule->flags)) {
                APP_CHECK(0, status, "unrecognized "
                    "input \"%s\"", tokens[ti]);
                return;
            }

            dst_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "type") == 0) {
            APP_CHECK_PRESENCE(type_p, tokens[ti], status);
            if (status->status < 0)
                return;

            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;

            if (strcmp(tokens[ti], "inline-crypto-offload") == 0)
                ips->type =
                    RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO;
            else if (strcmp(tokens[ti],
                    "inline-protocol-offload") == 0)
                ips->type =
                RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL;
            else if (strcmp(tokens[ti],
                    "lookaside-protocol-offload") == 0)
                ips->type =
                RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL;
            else if (strcmp(tokens[ti], "no-offload") == 0)
                ips->type = RTE_SECURITY_ACTION_TYPE_NONE;
            else if (strcmp(tokens[ti], "cpu-crypto") == 0)
                ips->type = RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO;
            else {
                APP_CHECK(0, status, "Invalid input \"%s\"",
                        tokens[ti]);
                return;
            }

            type_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "port_id") == 0) {
            APP_CHECK_PRESENCE(portid_p, tokens[ti], status);
            if (status->status < 0)
                return;
            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;
            if (rule->portid == UINT16_MAX)
                rule->portid = atoi(tokens[ti]);
            else if (rule->portid != atoi(tokens[ti])) {
                APP_CHECK(0, status,
                    "portid %s not matching with already assigned portid %u",
                    tokens[ti], rule->portid);
                return;
            }
            portid_p = 1;
            continue;
        }

        if (strcmp(tokens[ti], "mss") == 0) {
            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;
            rule->mss = atoi(tokens[ti]);
            if (status->status < 0)
                return;
            continue;
        }

        if (strcmp(tokens[ti], "esn") == 0) {
            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;
            rule->esn = atoll(tokens[ti]);
            if (status->status < 0)
                return;
            continue;
        }

        if (strcmp(tokens[ti], "fallback") == 0) {
            struct rte_ipsec_session *fb;

            APP_CHECK(app_sa_prm.enable, status, "Fallback session "
                "not allowed for legacy mode.");
            if (status->status < 0)
                return;
            APP_CHECK(ips->type ==
                RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO, status,
                "Fallback session allowed if primary session "
                "is of type inline-crypto-offload only.");
            if (status->status < 0)
                return;
            APP_CHECK(rule->direction ==
                RTE_SECURITY_IPSEC_SA_DIR_INGRESS, status,
                "Fallback session not allowed for egress "
                "rule");
            if (status->status < 0)
                return;
            APP_CHECK_PRESENCE(fallback_p, tokens[ti], status);
            if (status->status < 0)
                return;
            INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
            if (status->status < 0)
                return;
            fb = ipsec_get_fallback_session(rule);
            if (strcmp(tokens[ti], "lookaside-none") == 0)
                fb->type = RTE_SECURITY_ACTION_TYPE_NONE;
            else if (strcmp(tokens[ti], "cpu-crypto") == 0)
                fb->type = RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO;
            else {
                APP_CHECK(0, status, "unrecognized fallback "
                    "type %s.", tokens[ti]);
                return;
            }

            rule->fallback_sessions = 1;
            nb_crypto_sessions++;
            fallback_p = 1;
            continue;
        }
        if (strcmp(tokens[ti], "flow-direction") == 0) {
            switch (ips->type) {
            case RTE_SECURITY_ACTION_TYPE_NONE:
            case RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO:
                rule->fdir_flag = 1;
                INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
                if (status->status < 0)
                    return;
                if (rule->portid == UINT16_MAX)
                    rule->portid = atoi(tokens[ti]);
                else if (rule->portid != atoi(tokens[ti])) {
                    APP_CHECK(0, status,
                        "portid %s not matching with already assigned portid %u",
                        tokens[ti], rule->portid);
                    return;
                }
                INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
                if (status->status < 0)
                    return;
                rule->fdir_qid = atoi(tokens[ti]);
                /* validating portid and queueid */
                status_p = check_flow_params(rule->portid,
                        rule->fdir_qid);
                if (status_p < 0) {
                    printf("port id %u / queue id %u is "
                        "not valid\n", rule->portid,
                         rule->fdir_qid);
                }
                break;
            case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO:
            case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
            case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL:
            default:
                APP_CHECK(0, status,
                    "flow director not supported for security session type %d",
                    ips->type);
                return;
            }
            continue;
        }
        if (strcmp(tokens[ti], "udp-encap") == 0) {
            switch (ips->type) {
            case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL:
            case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
                APP_CHECK_PRESENCE(udp_encap_p, tokens[ti],
                           status);
                if (status->status < 0)
                    return;

                rule->udp_encap = 1;
                app_sa_prm.udp_encap = 1;
                udp_encap_p = 1;
                break;
            case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO:
                rule->udp_encap = 1;
                rule->udp.sport = 0;
                rule->udp.dport = 4500;
                break;
            default:
                APP_CHECK(0, status,
                    "UDP encapsulation not supported for "
                    "security session type %d",
                    ips->type);
                return;
            }
            continue;
        }

        /* unrecognizable input */
        APP_CHECK(0, status, "unrecognized input \"%s\"",
            tokens[ti]);
        return;
    }

    if (aead_algo_p) {
        APP_CHECK(cipher_algo_p == 0, status,
                "AEAD used, no need for cipher options");
        if (status->status < 0)
            return;

        APP_CHECK(auth_algo_p == 0, status,
                "AEAD used, no need for auth options");
        if (status->status < 0)
            return;
    } else {
        APP_CHECK(cipher_algo_p == 1, status, "missing cipher or AEAD options");
        if (status->status < 0)
            return;

        APP_CHECK(auth_algo_p == 1, status, "missing auth or AEAD options");
        if (status->status < 0)
            return;
    }

    APP_CHECK(mode_p == 1, status, "missing mode option");
    if (status->status < 0)
        return;

    if ((ips->type != RTE_SECURITY_ACTION_TYPE_NONE && ips->type !=
            RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO) && (portid_p == 0))
        printf("Missing portid option, falling back to non-offload\n");

    if (!type_p || (!portid_p && ips->type !=
            RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO)) {
        ips->type = RTE_SECURITY_ACTION_TYPE_NONE;
    }

    nb_crypto_sessions++;
    *ri = *ri + 1;
}

static void
print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
{
    uint32_t i;
    uint8_t a, b, c, d;
    const struct rte_ipsec_session *ips;
    const struct rte_ipsec_session *fallback_ips;

    printf("\tspi_%s(%3u):", inbound?"in":"out", sa->spi);

    for (i = 0; i < RTE_DIM(cipher_algos); i++) {
        if (cipher_algos[i].algo == sa->cipher_algo &&
                cipher_algos[i].key_len == sa->cipher_key_len) {
            printf("%s ", cipher_algos[i].keyword);
            break;
        }
    }

    for (i = 0; i < RTE_DIM(auth_algos); i++) {
        if (auth_algos[i].algo == sa->auth_algo) {
            printf("%s ", auth_algos[i].keyword);
            break;
        }
    }

    for (i = 0; i < RTE_DIM(aead_algos); i++) {
        if (aead_algos[i].algo == sa->aead_algo &&
                aead_algos[i].key_len-4 == sa->cipher_key_len) {
            printf("%s ", aead_algos[i].keyword);
            break;
        }
    }

    printf("mode:");
    if (sa->udp_encap)
        printf("UDP encapsulated ");

    switch (WITHOUT_TRANSPORT_VERSION(sa->flags)) {
    case IP4_TUNNEL:
        printf("IP4Tunnel ");
        uint32_t_to_char(sa->src.ip.ip4, &a, &b, &c, &d);
        printf("%hhu.%hhu.%hhu.%hhu ", d, c, b, a);
        uint32_t_to_char(sa->dst.ip.ip4, &a, &b, &c, &d);
        printf("%hhu.%hhu.%hhu.%hhu", d, c, b, a);
        break;
    case IP6_TUNNEL:
        printf("IP6Tunnel ");
        for (i = 0; i < 16; i++) {
            if (i % 2 && i != 15)
                printf("%.2x:", sa->src.ip.ip6.ip6_b[i]);
            else
                printf("%.2x", sa->src.ip.ip6.ip6_b[i]);
        }
        printf(" ");
        for (i = 0; i < 16; i++) {
            if (i % 2 && i != 15)
                printf("%.2x:", sa->dst.ip.ip6.ip6_b[i]);
            else
                printf("%.2x", sa->dst.ip.ip6.ip6_b[i]);
        }
        break;
    case TRANSPORT:
        printf("Transport ");
        break;
    }

    ips = &sa->sessions[IPSEC_SESSION_PRIMARY];
    printf(" type:");
    switch (ips->type) {
    case RTE_SECURITY_ACTION_TYPE_NONE:
        printf("no-offload ");
        break;
    case RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO:
        printf("inline-crypto-offload ");
        break;
    case RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL:
        printf("inline-protocol-offload ");
        break;
    case RTE_SECURITY_ACTION_TYPE_LOOKASIDE_PROTOCOL:
        printf("lookaside-protocol-offload ");
        break;
    case RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO:
        printf("cpu-crypto-accelerated ");
        break;
    }

    fallback_ips = &sa->sessions[IPSEC_SESSION_FALLBACK];
    if (fallback_ips != NULL && sa->fallback_sessions > 0) {
        printf("inline fallback: ");
        switch (fallback_ips->type) {
        case RTE_SECURITY_ACTION_TYPE_NONE:
            printf("lookaside-none");
            break;
        case RTE_SECURITY_ACTION_TYPE_CPU_CRYPTO:
            printf("cpu-crypto-accelerated");
            break;
        default:
            printf("invalid");
            break;
        }
    }
    if (sa->fdir_flag == 1)
        printf("flow-direction port %d queue %d", sa->portid,
                sa->fdir_qid);

    printf("\n");
}

static struct sa_ctx *
sa_create(const char *name, int32_t socket_id, uint32_t nb_sa)
{
    char s[PATH_MAX];
    struct sa_ctx *sa_ctx;
    uint32_t mz_size;
    const struct rte_memzone *mz;

    snprintf(s, sizeof(s), "%s_%u", name, socket_id);

    /* Create SA context */
    printf("Creating SA context with %u maximum entries on socket %d\n",
            nb_sa, socket_id);

    mz_size = sizeof(struct ipsec_xf) * nb_sa;
    mz = rte_memzone_reserve(s, mz_size, socket_id,
            RTE_MEMZONE_1GB | RTE_MEMZONE_SIZE_HINT_ONLY);
    if (mz == NULL) {
        printf("Failed to allocate SA XFORM memory\n");
        rte_errno = ENOMEM;
        return NULL;
    }

    sa_ctx = rte_zmalloc(NULL, sizeof(struct sa_ctx) +
        sizeof(struct ipsec_sa) * nb_sa, RTE_CACHE_LINE_SIZE);

    if (sa_ctx == NULL) {
        printf("Failed to allocate SA CTX memory\n");
        rte_errno = ENOMEM;
        rte_memzone_free(mz);
        return NULL;
    }

    sa_ctx->xf = (struct ipsec_xf *)mz->addr;
    sa_ctx->nb_sa = nb_sa;

    return sa_ctx;
}

static int
check_eth_dev_caps(uint16_t portid, uint32_t inbound, uint32_t tso)
{
    struct rte_eth_dev_info dev_info;
    int retval;

    retval = rte_eth_dev_info_get(portid, &dev_info);
    if (retval != 0) {
        RTE_LOG(ERR, IPSEC,
            "Error during getting device (port %u) info: %s\n",
            portid, strerror(-retval));

        return retval;
    }

    if (inbound) {
        if ((dev_info.rx_offload_capa &
                RTE_ETH_RX_OFFLOAD_SECURITY) == 0) {
            RTE_LOG(WARNING, PORT,
                "hardware RX IPSec offload is not supported\n");
            return -EINVAL;
        }

    } else { /* outbound */
        if ((dev_info.tx_offload_capa &
                RTE_ETH_TX_OFFLOAD_SECURITY) == 0) {
            RTE_LOG(WARNING, PORT,
                "hardware TX IPSec offload is not supported\n");
            return -EINVAL;
        }
        if (tso && (dev_info.tx_offload_capa &
                RTE_ETH_TX_OFFLOAD_TCP_TSO) == 0) {
            RTE_LOG(WARNING, PORT,
                "hardware TCP TSO offload is not supported\n");
            return -EINVAL;
        }
    }
    return 0;
}

/*
 * Helper function, tries to determine next_proto for SPI
 * by searching though SP rules.
 */
static int
get_spi_proto(uint32_t spi, enum rte_security_ipsec_sa_direction dir,
        struct ip_addr ip_addr[2], uint32_t mask[2])
{
    int32_t rc4, rc6;

    rc4 = sp4_spi_present(spi, dir == RTE_SECURITY_IPSEC_SA_DIR_INGRESS,
                ip_addr, mask);
    rc6 = sp6_spi_present(spi, dir == RTE_SECURITY_IPSEC_SA_DIR_INGRESS,
                ip_addr, mask);

    if (rc4 >= 0) {
        if (rc6 >= 0) {
            RTE_LOG(ERR, IPSEC,
                "%s: SPI %u used simultaneously by "
                "IPv4(%d) and IPv6 (%d) SP rules\n",
                __func__, spi, rc4, rc6);
            return -EINVAL;
        } else
            return IPPROTO_IPIP;
    } else if (rc6 < 0) {
        RTE_LOG(ERR, IPSEC,
            "%s: SPI %u is not used by any SP rule\n",
            __func__, spi);
        return -EINVAL;
    } else
        return IPPROTO_IPV6;
}

/*
 * Helper function for getting source and destination IP addresses
 * from SP. Needed for inline crypto transport mode, as addresses are not
 * provided in config file for that mode. It checks if SP for current SA exists,
 * and based on what type of protocol is returned, it stores appropriate
 * addresses got from SP into SA.
 */
static int
sa_add_address_inline_crypto(struct ipsec_sa *sa)
{
    int protocol;
    struct ip_addr ip_addr[2];
    uint32_t mask[2];

    protocol = get_spi_proto(sa->spi, sa->direction, ip_addr, mask);
    if (protocol < 0)
        return protocol;
    else if (protocol == IPPROTO_IPIP) {
        sa->flags |= IP4_TRANSPORT;
        if (mask[0] == IP4_FULL_MASK &&
                mask[1] == IP4_FULL_MASK &&
                ip_addr[0].ip.ip4 != 0 &&
                ip_addr[1].ip.ip4 != 0) {

            sa->src.ip.ip4 = ip_addr[0].ip.ip4;
            sa->dst.ip.ip4 = ip_addr[1].ip.ip4;
        } else {
            RTE_LOG(ERR, IPSEC,
            "%s: No valid address or mask entry in"
            " IPv4 SP rule for SPI %u\n",
            __func__, sa->spi);
            return -EINVAL;
        }
    } else if (protocol == IPPROTO_IPV6) {
        sa->flags |= IP6_TRANSPORT;
        if (mask[0] == IP6_FULL_MASK &&
                mask[1] == IP6_FULL_MASK &&
                (ip_addr[0].ip.ip6.ip6[0] != 0 ||
                ip_addr[0].ip.ip6.ip6[1] != 0) &&
                (ip_addr[1].ip.ip6.ip6[0] != 0 ||
                ip_addr[1].ip.ip6.ip6[1] != 0)) {

            sa->src.ip.ip6 = ip_addr[0].ip.ip6;
            sa->dst.ip.ip6 = ip_addr[1].ip.ip6;
        } else {
            RTE_LOG(ERR, IPSEC,
            "%s: No valid address or mask entry in"
            " IPv6 SP rule for SPI %u\n",
            __func__, sa->spi);
            return -EINVAL;
        }
    }
    return 0;
}

static int
sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
        uint32_t nb_entries, uint32_t inbound,
        struct socket_ctx *skt_ctx)
{
    struct ipsec_sa *sa;
    uint32_t i, idx;
    uint16_t iv_length, aad_length;
    int inline_status;
    int32_t rc;
    struct rte_ipsec_session *ips;

    /* for ESN upper 32 bits of SQN also need to be part of AAD */
    aad_length = (app_sa_prm.enable_esn != 0) ? sizeof(uint32_t) : 0;

    for (i = 0; i < nb_entries; i++) {
        idx = i;
        sa = &sa_ctx->sa[idx];
        if (sa->spi != 0) {
            printf("Index %u already in use by SPI %u\n",
                    idx, sa->spi);
            return -EINVAL;
        }
        *sa = entries[i];

        if (inbound) {
            rc = ipsec_sad_add(&sa_ctx->sad, sa);
            if (rc != 0)
                return rc;
        }

        sa->seq = 0;
        ips = ipsec_get_primary_session(sa);

        if (ips->type == RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
            ips->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
            if (check_eth_dev_caps(sa->portid, inbound, sa->mss))
                return -EINVAL;
        }

        switch (WITHOUT_TRANSPORT_VERSION(sa->flags)) {
        case IP4_TUNNEL:
            sa->src.ip.ip4 = rte_cpu_to_be_32(sa->src.ip.ip4);
            sa->dst.ip.ip4 = rte_cpu_to_be_32(sa->dst.ip.ip4);
            break;
        case TRANSPORT:
            if (ips->type ==
                RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
                inline_status =
                    sa_add_address_inline_crypto(sa);
                if (inline_status < 0)
                    return inline_status;
            }
            break;
        }


        if (sa->aead_algo == RTE_CRYPTO_AEAD_AES_GCM ||
            sa->aead_algo == RTE_CRYPTO_AEAD_AES_CCM ||
            sa->aead_algo == RTE_CRYPTO_AEAD_CHACHA20_POLY1305) {

            if (sa->aead_algo == RTE_CRYPTO_AEAD_AES_CCM)
                iv_length = 11;
            else
                iv_length = 12;

            sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AEAD;
            sa_ctx->xf[idx].a.aead.algo = sa->aead_algo;
            sa_ctx->xf[idx].a.aead.key.data = sa->cipher_key;
            sa_ctx->xf[idx].a.aead.key.length =
                sa->cipher_key_len;
            sa_ctx->xf[idx].a.aead.op = (inbound == 1) ?
                RTE_CRYPTO_AEAD_OP_DECRYPT :
                RTE_CRYPTO_AEAD_OP_ENCRYPT;
            sa_ctx->xf[idx].a.next = NULL;
            sa_ctx->xf[idx].a.aead.iv.offset = IV_OFFSET;
            sa_ctx->xf[idx].a.aead.iv.length = iv_length;
            sa_ctx->xf[idx].a.aead.aad_length =
                sa->aad_len + aad_length;
            sa_ctx->xf[idx].a.aead.digest_length =
                sa->digest_len;

            sa->xforms = &sa_ctx->xf[idx].a;
        } else {
            switch (sa->cipher_algo) {
            case RTE_CRYPTO_CIPHER_NULL:
            case RTE_CRYPTO_CIPHER_3DES_CBC:
            case RTE_CRYPTO_CIPHER_AES_CBC:
            case RTE_CRYPTO_CIPHER_AES_CTR:
                iv_length = sa->iv_len;
                break;
            default:
                RTE_LOG(ERR, IPSEC_ESP,
                        "unsupported cipher algorithm %u\n",
                        sa->cipher_algo);
                return -EINVAL;
            }

            /* AES_GMAC uses salt like AEAD algorithms */
            if (sa->auth_algo == RTE_CRYPTO_AUTH_AES_GMAC)
                iv_length = 12;

            if (inbound) {
                sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
                sa_ctx->xf[idx].b.cipher.algo = sa->cipher_algo;
                sa_ctx->xf[idx].b.cipher.key.data = sa->cipher_key;
                sa_ctx->xf[idx].b.cipher.key.length =
                    sa->cipher_key_len;
                sa_ctx->xf[idx].b.cipher.op =
                    RTE_CRYPTO_CIPHER_OP_DECRYPT;
                sa_ctx->xf[idx].b.next = NULL;
                sa_ctx->xf[idx].b.cipher.iv.offset = IV_OFFSET;
                sa_ctx->xf[idx].b.cipher.iv.length = iv_length;

                sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AUTH;
                sa_ctx->xf[idx].a.auth.algo = sa->auth_algo;
                sa_ctx->xf[idx].a.auth.key.data = sa->auth_key;
                sa_ctx->xf[idx].a.auth.key.length =
                    sa->auth_key_len;
                sa_ctx->xf[idx].a.auth.digest_length =
                    sa->digest_len;
                sa_ctx->xf[idx].a.auth.op =
                    RTE_CRYPTO_AUTH_OP_VERIFY;
                sa_ctx->xf[idx].a.auth.iv.offset = IV_OFFSET;
                sa_ctx->xf[idx].a.auth.iv.length = iv_length;

            } else { /* outbound */
                sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_CIPHER;
                sa_ctx->xf[idx].a.cipher.algo = sa->cipher_algo;
                sa_ctx->xf[idx].a.cipher.key.data = sa->cipher_key;
                sa_ctx->xf[idx].a.cipher.key.length =
                    sa->cipher_key_len;
                sa_ctx->xf[idx].a.cipher.op =
                    RTE_CRYPTO_CIPHER_OP_ENCRYPT;
                sa_ctx->xf[idx].a.next = NULL;
                sa_ctx->xf[idx].a.cipher.iv.offset = IV_OFFSET;
                sa_ctx->xf[idx].a.cipher.iv.length = iv_length;

                sa_ctx->xf[idx].b.type = RTE_CRYPTO_SYM_XFORM_AUTH;
                sa_ctx->xf[idx].b.auth.algo = sa->auth_algo;
                sa_ctx->xf[idx].b.auth.key.data = sa->auth_key;
                sa_ctx->xf[idx].b.auth.key.length =
                    sa->auth_key_len;
                sa_ctx->xf[idx].b.auth.digest_length =
                    sa->digest_len;
                sa_ctx->xf[idx].b.auth.op =
                    RTE_CRYPTO_AUTH_OP_GENERATE;
                sa_ctx->xf[idx].b.auth.iv.offset = IV_OFFSET;
                sa_ctx->xf[idx].b.auth.iv.length = iv_length;

            }

            if (sa->auth_algo == RTE_CRYPTO_AUTH_AES_GMAC) {
                sa->xforms = inbound ?
                    &sa_ctx->xf[idx].a : &sa_ctx->xf[idx].b;
                sa->xforms->next = NULL;

            } else {
                sa_ctx->xf[idx].a.next = &sa_ctx->xf[idx].b;
                sa_ctx->xf[idx].b.next = NULL;
                sa->xforms = &sa_ctx->xf[idx].a;
            }
        }

        if (ips->type ==
            RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
            ips->type ==
            RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
            rc = create_inline_session(skt_ctx, sa, ips);
            if (rc != 0) {
                RTE_LOG(ERR, IPSEC_ESP,
                    "create_inline_session() failed\n");
                return -EINVAL;
            }
        }

        if (sa->fdir_flag && inbound) {
            rc = create_ipsec_esp_flow(sa);
            if (rc != 0)
                RTE_LOG(ERR, IPSEC_ESP,
                    "create_ipsec_esp_flow() failed\n");
        }
        print_one_sa_rule(sa, inbound);
    }

    return 0;
}

static inline int
sa_out_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
        uint32_t nb_entries, struct socket_ctx *skt_ctx)
{
    return sa_add_rules(sa_ctx, entries, nb_entries, 0, skt_ctx);
}

static inline int
sa_in_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
        uint32_t nb_entries, struct socket_ctx *skt_ctx)
{
    return sa_add_rules(sa_ctx, entries, nb_entries, 1, skt_ctx);
}

/*
 * helper function, fills parameters that are identical for all SAs
 */
static void
fill_ipsec_app_sa_prm(struct rte_ipsec_sa_prm *prm,
    const struct app_sa_prm *app_prm)
{
    memset(prm, 0, sizeof(*prm));

    prm->flags = app_prm->flags;
    prm->ipsec_xform.options.esn = app_prm->enable_esn;
    prm->ipsec_xform.replay_win_sz = app_prm->window_size;
}

static int
fill_ipsec_sa_prm(struct rte_ipsec_sa_prm *prm, const struct ipsec_sa *ss,
    const struct rte_ipv4_hdr *v4, struct rte_ipv6_hdr *v6)
{
    int32_t rc;

    /*
     * Try to get SPI next proto by searching that SPI in SPD.
     * probably not the optimal way, but there seems nothing
     * better right now.
     */
    rc = get_spi_proto(ss->spi, ss->direction, NULL, NULL);
    if (rc < 0)
        return rc;

    fill_ipsec_app_sa_prm(prm, &app_sa_prm);
    prm->userdata = (uintptr_t)ss;

    /* setup ipsec xform */
    prm->ipsec_xform.spi = ss->spi;
    prm->ipsec_xform.salt = ss->salt;
    prm->ipsec_xform.direction = ss->direction;
    prm->ipsec_xform.proto = RTE_SECURITY_IPSEC_SA_PROTO_ESP;
    prm->ipsec_xform.mode = (IS_TRANSPORT(ss->flags)) ?
        RTE_SECURITY_IPSEC_SA_MODE_TRANSPORT :
        RTE_SECURITY_IPSEC_SA_MODE_TUNNEL;
    prm->ipsec_xform.options.udp_encap = ss->udp_encap;
    prm->ipsec_xform.options.ecn = 1;
    prm->ipsec_xform.options.copy_dscp = 1;

    if (IS_IP4_TUNNEL(ss->flags)) {
        prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV4;
        prm->tun.hdr_len = sizeof(*v4);
        prm->tun.next_proto = rc;
        prm->tun.hdr = v4;
    } else if (IS_IP6_TUNNEL(ss->flags)) {
        prm->ipsec_xform.tunnel.type = RTE_SECURITY_IPSEC_TUNNEL_IPV6;
        prm->tun.hdr_len = sizeof(*v6);
        prm->tun.next_proto = rc;
        prm->tun.hdr = v6;
    } else {
        /* transport mode */
        prm->trs.proto = rc;
    }

    /* setup crypto section */
    prm->crypto_xform = ss->xforms;
    return 0;
}

static int
fill_ipsec_session(struct rte_ipsec_session *ss, struct rte_ipsec_sa *sa)
{
    int32_t rc = 0;

    ss->sa = sa;

    if (ss->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO ||
        ss->type == RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL) {
        if (ss->security.ses != NULL) {
            rc = rte_ipsec_session_prepare(ss);
            if (rc != 0)
                memset(ss, 0, sizeof(*ss));
        }
    }

    return rc;
}

/*
 * Initialise related rte_ipsec_sa object.
 */
static int
ipsec_sa_init(struct ipsec_sa *lsa, struct rte_ipsec_sa *sa, uint32_t sa_size)
{
    int rc;
    struct rte_ipsec_sa_prm prm;
    struct rte_ipsec_session *ips;
    struct rte_ipv4_hdr v4  = {
        .version_ihl = IPVERSION << 4 |
            sizeof(v4) / RTE_IPV4_IHL_MULTIPLIER,
        .time_to_live = IPDEFTTL,
        .next_proto_id = IPPROTO_ESP,
        .src_addr = lsa->src.ip.ip4,
        .dst_addr = lsa->dst.ip.ip4,
    };
    struct rte_ipv6_hdr v6 = {
        .vtc_flow = htonl(IP6_VERSION << 28),
        .proto = IPPROTO_ESP,
    };

    if (IS_IP6_TUNNEL(lsa->flags)) {
        memcpy(v6.src_addr, lsa->src.ip.ip6.ip6_b, sizeof(v6.src_addr));
        memcpy(v6.dst_addr, lsa->dst.ip.ip6.ip6_b, sizeof(v6.dst_addr));
    }

    rc = fill_ipsec_sa_prm(&prm, lsa, &v4, &v6);
    if (rc == 0)
        rc = rte_ipsec_sa_init(sa, &prm, sa_size);
    if (rc < 0)
        return rc;

    if (lsa->flags & SA_TELEMETRY_ENABLE)
        rte_ipsec_telemetry_sa_add(sa);

    /* init primary processing session */
    ips = ipsec_get_primary_session(lsa);
    rc = fill_ipsec_session(ips, sa);
    if (rc != 0)
        return rc;

    /* init inline fallback processing session */
    if (lsa->fallback_sessions == 1)
        rc = fill_ipsec_session(ipsec_get_fallback_session(lsa), sa);

    return rc;
}

/*
 * Allocate space and init rte_ipsec_sa structures,
 * one per session.
 */
static int
ipsec_satbl_init(struct sa_ctx *ctx, uint32_t nb_ent, int32_t socket)
{
    int32_t rc, sz;
    uint32_t i, idx;
    size_t tsz;
    struct rte_ipsec_sa *sa;
    struct ipsec_sa *lsa;
    struct rte_ipsec_sa_prm prm;

    /* determine SA size */
    idx = 0;
    fill_ipsec_sa_prm(&prm, ctx->sa + idx, NULL, NULL);
    sz = rte_ipsec_sa_size(&prm);
    if (sz < 0) {
        RTE_LOG(ERR, IPSEC, "%s(%p, %u, %d): "
            "failed to determine SA size, error code: %d\n",
            __func__, ctx, nb_ent, socket, sz);
        return sz;
    }

    tsz = sz * nb_ent;

    ctx->satbl = rte_zmalloc_socket(NULL, tsz, RTE_CACHE_LINE_SIZE, socket);
    if (ctx->satbl == NULL) {
        RTE_LOG(ERR, IPSEC,
            "%s(%p, %u, %d): failed to allocate %zu bytes\n",
            __func__,  ctx, nb_ent, socket, tsz);
        return -ENOMEM;
    }

    rc = 0;
    for (i = 0; i != nb_ent && rc == 0; i++) {

        idx = i;

        sa = (struct rte_ipsec_sa *)((uintptr_t)ctx->satbl + sz * i);
        lsa = ctx->sa + idx;

        rc = ipsec_sa_init(lsa, sa, sz);
    }

    return rc;
}

static int
sa_cmp(const void *p, const void *q)
{
    uint32_t spi1 = ((const struct ipsec_sa *)p)->spi;
    uint32_t spi2 = ((const struct ipsec_sa *)q)->spi;

    return (int)(spi1 - spi2);
}

/*
 * Walk through all SA rules to find an SA with given SPI
 */
int
sa_spi_present(struct sa_ctx *sa_ctx, uint32_t spi, int inbound)
{
    uint32_t num;
    struct ipsec_sa *sa;
    struct ipsec_sa tmpl;
    const struct ipsec_sa *sar;

    sar = sa_ctx->sa;
    if (inbound != 0)
        num = nb_sa_in;
    else
        num = nb_sa_out;

    tmpl.spi = spi;

    sa = bsearch(&tmpl, sar, num, sizeof(struct ipsec_sa), sa_cmp);
    if (sa != NULL)
        return RTE_PTR_DIFF(sa, sar) / sizeof(struct ipsec_sa);

    return -ENOENT;
}

void
sa_init(struct socket_ctx *ctx, int32_t socket_id)
{
    int32_t rc;
    const char *name;

    if (ctx == NULL)
        rte_exit(EXIT_FAILURE, "NULL context.\n");

    if (ctx->sa_in != NULL)
        rte_exit(EXIT_FAILURE, "Inbound SA DB for socket %u already "
                "initialized\n", socket_id);

    if (ctx->sa_out != NULL)
        rte_exit(EXIT_FAILURE, "Outbound SA DB for socket %u already "
                "initialized\n", socket_id);

    if (nb_sa_in > 0) {
        name = "sa_in";
        ctx->sa_in = sa_create(name, socket_id, nb_sa_in);
        if (ctx->sa_in == NULL)
            rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
                "context %s in socket %d\n", rte_errno,
                name, socket_id);

        rc = ipsec_sad_create(name, &ctx->sa_in->sad, socket_id,
                &sa_in_cnt);
        if (rc != 0)
            rte_exit(EXIT_FAILURE, "failed to init SAD\n");

        sa_in_add_rules(ctx->sa_in, sa_in, nb_sa_in, ctx);

        if (app_sa_prm.enable != 0) {
            rc = ipsec_satbl_init(ctx->sa_in, nb_sa_in,
                socket_id);
            if (rc != 0)
                rte_exit(EXIT_FAILURE,
                    "failed to init inbound SAs\n");
        }
    } else
        RTE_LOG(WARNING, IPSEC, "No SA Inbound rule specified\n");

    if (nb_sa_out > 0) {
        name = "sa_out";
        ctx->sa_out = sa_create(name, socket_id, nb_sa_out);
        if (ctx->sa_out == NULL)
            rte_exit(EXIT_FAILURE, "Error [%d] creating SA "
                "context %s in socket %d\n", rte_errno,
                name, socket_id);

        sa_out_add_rules(ctx->sa_out, sa_out, nb_sa_out, ctx);

        if (app_sa_prm.enable != 0) {
            rc = ipsec_satbl_init(ctx->sa_out, nb_sa_out,
                socket_id);
            if (rc != 0)
                rte_exit(EXIT_FAILURE,
                    "failed to init outbound SAs\n");
        }
    } else
        RTE_LOG(WARNING, IPSEC, "No SA Outbound rule "
            "specified\n");
}

int
inbound_sa_check(struct sa_ctx *sa_ctx, struct rte_mbuf *m, uint32_t sa_idx)
{
    struct ipsec_mbuf_metadata *priv;
    struct ipsec_sa *sa;

    priv = get_priv(m);
    sa = priv->sa;
    if (sa != NULL)
        return (sa_ctx->sa[sa_idx].spi == sa->spi);

    RTE_LOG(ERR, IPSEC, "SA not saved in private data\n");
    return 0;
}

void
inbound_sa_lookup(struct sa_ctx *sa_ctx, struct rte_mbuf *pkts[],
        void *sa_arr[], uint16_t nb_pkts)
{
    uint32_t i;
    void *result_sa;
    struct ipsec_sa *sa;

    sad_lookup(&sa_ctx->sad, pkts, sa_arr, nb_pkts);

    /*
     * Mark need for inline offload fallback on the LSB of SA pointer.
     * Thanks to packet grouping mechanism which ipsec_process is using
     * packets marked for fallback processing will form separate group.
     *
     * Because it is not safe to use SA pointer it is casted to generic
     * pointer to prevent from unintentional use. Use ipsec_mask_saptr
     * to get valid struct pointer.
     */
    for (i = 0; i < nb_pkts; i++) {
        if (sa_arr[i] == NULL)
            continue;

        result_sa = sa = sa_arr[i];
        if (MBUF_NO_SEC_OFFLOAD(pkts[i]) &&
            sa->fallback_sessions > 0) {
            uintptr_t intsa = (uintptr_t)sa;
            intsa |= IPSEC_SA_OFFLOAD_FALLBACK_FLAG;
            result_sa = (void *)intsa;
        }
        sa_arr[i] = result_sa;
    }
}

void
outbound_sa_lookup(struct sa_ctx *sa_ctx, uint32_t sa_idx[],
        void *sa[], uint16_t nb_pkts)
{
    uint32_t i;

    for (i = 0; i < nb_pkts; i++)
        sa[i] = &sa_ctx->sa[sa_idx[i]];
}

/*
 * Select HW offloads to be used.
 */
int
sa_check_offloads(uint16_t port_id, uint64_t *rx_offloads,
        uint64_t *tx_offloads)
{
    struct ipsec_sa *rule;
    uint32_t idx_sa;
    enum rte_security_session_action_type rule_type;

    *rx_offloads = 0;
    *tx_offloads = 0;

    /* Check for inbound rules that use offloads and use this port */
    for (idx_sa = 0; idx_sa < nb_sa_in; idx_sa++) {
        rule = &sa_in[idx_sa];
        rule_type = ipsec_get_action_type(rule);
        if ((rule_type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO ||
                rule_type ==
                RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL)
                && rule->portid == port_id)
            *rx_offloads |= RTE_ETH_RX_OFFLOAD_SECURITY;
    }

    /* Check for outbound rules that use offloads and use this port */
    for (idx_sa = 0; idx_sa < nb_sa_out; idx_sa++) {
        rule = &sa_out[idx_sa];
        rule_type = ipsec_get_action_type(rule);
        if ((rule_type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO ||
                rule_type ==
                RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL)
                && rule->portid == port_id) {
            *tx_offloads |= RTE_ETH_TX_OFFLOAD_SECURITY;
            if (rule->mss)
                *tx_offloads |= RTE_ETH_TX_OFFLOAD_TCP_TSO;
        }
    }
    return 0;
}

void
sa_sort_arr(void)
{
    qsort(sa_in, nb_sa_in, sizeof(struct ipsec_sa), sa_cmp);
    qsort(sa_out, nb_sa_out, sizeof(struct ipsec_sa), sa_cmp);
}

uint32_t
get_nb_crypto_sessions(void)
{
    return nb_crypto_sessions;
}