examples/ipsec-secgw: fix GCM IV length
[dpdk.git] / examples / ipsec-secgw / sa.c
index 52752e1..a8dee34 100644 (file)
@@ -31,6 +31,8 @@
 
 #define IP6_FULL_MASK (sizeof(((struct ip_addr *)NULL)->ip.ip6.ip6) * CHAR_BIT)
 
+#define MBUF_NO_SEC_OFFLOAD(m) ((m->ol_flags & PKT_RX_SEC_OFFLOAD) == 0)
+
 struct supported_cipher_algo {
        const char *keyword;
        enum rte_crypto_cipher_algorithm algo;
@@ -235,6 +237,7 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
        uint32_t mode_p = 0;
        uint32_t type_p = 0;
        uint32_t portid_p = 0;
+       uint32_t fallback_p = 0;
 
        if (strcmp(tokens[0], "in") == 0) {
                ri = &nb_sa_in;
@@ -245,6 +248,7 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
                        return;
 
                rule = &sa_in[*ri];
+               rule->direction = RTE_SECURITY_IPSEC_SA_DIR_INGRESS;
        } else {
                ri = &nb_sa_out;
 
@@ -254,6 +258,7 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
                        return;
 
                rule = &sa_out[*ri];
+               rule->direction = RTE_SECURITY_IPSEC_SA_DIR_EGRESS;
        }
 
        /* spi number */
@@ -263,7 +268,7 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
        if (atoi(tokens[1]) == INVALID_SPI)
                return;
        rule->spi = atoi(tokens[1]);
-       ips = ipsec_get_session(rule);
+       ips = ipsec_get_primary_session(rule);
 
        for (ti = 2; ti < n_tokens; ti++) {
                if (strcmp(tokens[ti], "mode") == 0) {
@@ -596,6 +601,45 @@ parse_sa_tokens(char **tokens, uint32_t n_tokens,
                        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 {
+                               APP_CHECK(0, status, "unrecognized fallback "
+                                       "type %s.", tokens[ti]);
+                               return;
+                       }
+
+                       rule->fallback_sessions = 1;
+                       fallback_p = 1;
+                       continue;
+               }
+
                /* unrecognizeable input */
                APP_CHECK(0, status, "unrecognized input \"%s\"",
                        tokens[ti]);
@@ -643,6 +687,7 @@ 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);
 
@@ -699,7 +744,7 @@ print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
                break;
        }
 
-       ips = &sa->ips;
+       ips = &sa->sessions[IPSEC_SESSION_PRIMARY];
        printf(" type:");
        switch (ips->type) {
        case RTE_SECURITY_ACTION_TYPE_NONE:
@@ -715,6 +760,15 @@ print_one_sa_rule(const struct ipsec_sa *sa, int inbound)
                printf("lookaside-protocol-offload ");
                break;
        }
+
+       fallback_ips = &sa->sessions[IPSEC_SESSION_FALLBACK];
+       if (fallback_ips != NULL && sa->fallback_sessions > 0) {
+               printf("inline fallback: ");
+               if (fallback_ips->type == RTE_SECURITY_ACTION_TYPE_NONE)
+                       printf("lookaside-none");
+               else
+                       printf("invalid");
+       }
        printf("\n");
 }
 
@@ -904,7 +958,7 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
                }
                *sa = entries[i];
                sa->seq = 0;
-               ips = ipsec_get_session(sa);
+               ips = ipsec_get_primary_session(sa);
 
                if (ips->type == RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
                        ips->type == RTE_SECURITY_ACTION_TYPE_INLINE_CRYPTO) {
@@ -912,9 +966,6 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
                                return -EINVAL;
                }
 
-               sa->direction = (inbound == 1) ?
-                               RTE_SECURITY_IPSEC_SA_DIR_INGRESS :
-                               RTE_SECURITY_IPSEC_SA_DIR_EGRESS;
 
                switch (WITHOUT_TRANSPORT_VERSION(sa->flags)) {
                case IP4_TUNNEL:
@@ -934,7 +985,7 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 
                if (sa->aead_algo == RTE_CRYPTO_AEAD_AES_GCM) {
                        struct rte_ipsec_session *ips;
-                       iv_length = 16;
+                       iv_length = 12;
 
                        sa_ctx->xf[idx].a.type = RTE_CRYPTO_SYM_XFORM_AEAD;
                        sa_ctx->xf[idx].a.aead.algo = sa->aead_algo;
@@ -954,7 +1005,7 @@ sa_add_rules(struct sa_ctx *sa_ctx, const struct ipsec_sa entries[],
 
                        sa->xforms = &sa_ctx->xf[idx].a;
 
-                       ips = ipsec_get_session(sa);
+                       ips = ipsec_get_primary_session(sa);
                        if (ips->type ==
                                RTE_SECURITY_ACTION_TYPE_INLINE_PROTOCOL ||
                                ips->type ==
@@ -1168,9 +1219,15 @@ ipsec_sa_init(struct ipsec_sa *lsa, struct rte_ipsec_sa *sa, uint32_t sa_size)
        if (rc < 0)
                return rc;
 
-       /* init processing session */
-       ips = ipsec_get_session(lsa);
+       /* 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;
 }
@@ -1326,13 +1383,14 @@ inbound_sa_check(struct sa_ctx *sa_ctx, struct rte_mbuf *m, uint32_t sa_idx)
 
 static inline void
 single_inbound_lookup(struct ipsec_sa *sadb, struct rte_mbuf *pkt,
-               struct ipsec_sa **sa_ret)
+               void **sa_ret)
 {
        struct rte_esp_hdr *esp;
        struct ip *ip;
        uint32_t *src4_addr;
        uint8_t *src6_addr;
        struct ipsec_sa *sa;
+       void *result_sa;
 
        *sa_ret = NULL;
 
@@ -1342,33 +1400,48 @@ single_inbound_lookup(struct ipsec_sa *sadb, struct rte_mbuf *pkt,
        if (esp->spi == INVALID_SPI)
                return;
 
-       sa = &sadb[SPI2IDX(rte_be_to_cpu_32(esp->spi))];
+       result_sa = sa = &sadb[SPI2IDX(rte_be_to_cpu_32(esp->spi))];
        if (rte_be_to_cpu_32(esp->spi) != sa->spi)
                return;
 
+       /*
+        * 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.
+        */
+       if (MBUF_NO_SEC_OFFLOAD(pkt) && sa->fallback_sessions > 0) {
+               uintptr_t intsa = (uintptr_t)sa;
+               intsa |= IPSEC_SA_OFFLOAD_FALLBACK_FLAG;
+               result_sa = (void *)intsa;
+       }
+
        switch (WITHOUT_TRANSPORT_VERSION(sa->flags)) {
        case IP4_TUNNEL:
                src4_addr = RTE_PTR_ADD(ip, offsetof(struct ip, ip_src));
                if ((ip->ip_v == IPVERSION) &&
                                (sa->src.ip.ip4 == *src4_addr) &&
                                (sa->dst.ip.ip4 == *(src4_addr + 1)))
-                       *sa_ret = sa;
+                       *sa_ret = result_sa;
                break;
        case IP6_TUNNEL:
                src6_addr = RTE_PTR_ADD(ip, offsetof(struct ip6_hdr, ip6_src));
                if ((ip->ip_v == IP6_VERSION) &&
                                !memcmp(&sa->src.ip.ip6.ip6, src6_addr, 16) &&
                                !memcmp(&sa->dst.ip.ip6.ip6, src6_addr + 16, 16))
-                       *sa_ret = sa;
+                       *sa_ret = result_sa;
                break;
        case TRANSPORT:
-               *sa_ret = sa;
+               *sa_ret = result_sa;
        }
 }
 
 void
 inbound_sa_lookup(struct sa_ctx *sa_ctx, struct rte_mbuf *pkts[],
-               struct ipsec_sa *sa[], uint16_t nb_pkts)
+               void *sa[], uint16_t nb_pkts)
 {
        uint32_t i;
 
@@ -1378,7 +1451,7 @@ inbound_sa_lookup(struct sa_ctx *sa_ctx, struct rte_mbuf *pkts[],
 
 void
 outbound_sa_lookup(struct sa_ctx *sa_ctx, uint32_t sa_idx[],
-               struct ipsec_sa *sa[], uint16_t nb_pkts)
+               void *sa[], uint16_t nb_pkts)
 {
        uint32_t i;