X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fah_encrypt.c;h=c962ea9038785d998b91cca761c3d698120d8696;hb=c5fe57dac12a46fa618259643909afaec1ac5aae;hp=d12ca6704f052a6fe841a9e4601ec37a29e394dd;hpb=72f2a3acb797797416a96dc10312ccd431126de7;p=vpp.git diff --git a/src/vnet/ipsec/ah_encrypt.c b/src/vnet/ipsec/ah_encrypt.c index d12ca6704f0..c962ea90387 100644 --- a/src/vnet/ipsec/ah_encrypt.c +++ b/src/vnet/ipsec/ah_encrypt.c @@ -22,11 +22,11 @@ #include #include #include +#include #define foreach_ah_encrypt_next \ - _ (DROP, "error-drop") \ - _ (IP4_LOOKUP, "ip4-lookup") \ - _ (IP6_LOOKUP, "ip6-lookup") \ + _ (DROP, "error-drop") \ + _ (HANDOFF, "handoff") \ _ (INTERFACE_OUTPUT, "interface-output") @@ -75,8 +75,8 @@ format_ah_encrypt_trace (u8 * s, va_list * args) CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); ah_encrypt_trace_t *t = va_arg (*args, ah_encrypt_trace_t *); - s = format (s, "ah: sa-index %d spi %u seq %u:%u integrity %U", - t->sa_index, t->spi, t->seq_hi, t->seq_lo, + s = format (s, "ah: sa-index %d spi %u (0x%08x) seq %u:%u integrity %U", + t->sa_index, t->spi, t->spi, t->seq_hi, t->seq_lo, format_ipsec_integ_alg, t->integ_alg); return s; } @@ -112,20 +112,21 @@ typedef struct { union { + /* Variable fields in the IP header not covered by the AH + * integrity check */ struct { - u8 hop_limit; u32 ip_version_traffic_class_and_flow_label; + u8 hop_limit; }; - struct { u8 ttl; u8 tos; }; }; - i16 current_data; u8 skip; + i16 current_data; u32 sa_index; } ah_encrypt_packet_data_t; @@ -175,7 +176,7 @@ ah_encrypt_inline (vlib_main_t * vm, current_sa_pkts, current_sa_bytes); current_sa_index = vnet_buffer (b[0])->ipsec.sad_index; - sa0 = pool_elt_at_index (im->sad, current_sa_index); + sa0 = ipsec_sa_get (current_sa_index); current_sa_bytes = current_sa_pkts = 0; } @@ -183,6 +184,22 @@ ah_encrypt_inline (vlib_main_t * vm, pd->sa_index = current_sa_index; next[0] = AH_ENCRYPT_NEXT_DROP; + if (PREDICT_FALSE (~0 == sa0->thread_index)) + { + /* this is the first packet to use this SA, claim the SA + * for this thread. this could happen simultaneously on + * another thread */ + clib_atomic_cmp_and_swap (&sa0->thread_index, ~0, + ipsec_sa_assign_thread (thread_index)); + } + + if (PREDICT_TRUE (thread_index != sa0->thread_index)) + { + vnet_buffer (b[0])->ipsec.thread_index = sa0->thread_index; + next[0] = AH_ENCRYPT_NEXT_HANDOFF; + goto next; + } + if (PREDICT_FALSE (esp_seq_advance (sa0))) { b[0]->error = node->errors[AH_ENCRYPT_ERROR_SEQ_CYCLED]; @@ -195,8 +212,6 @@ ah_encrypt_inline (vlib_main_t * vm, ssize_t adv; ih0 = vlib_buffer_get_current (b[0]); - pd->ttl = ih0->ip4.ttl; - pd->tos = ih0->ip4.tos; if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0))) { @@ -216,12 +231,12 @@ ah_encrypt_inline (vlib_main_t * vm, /* transport mode save the eth header before it is overwritten */ if (PREDICT_FALSE (!ipsec_sa_is_set_IS_TUNNEL (sa0))) { - ethernet_header_t *ieh0 = (ethernet_header_t *) - ((u8 *) vlib_buffer_get_current (b[0]) - - sizeof (ethernet_header_t)); - ethernet_header_t *oeh0 = - (ethernet_header_t *) ((u8 *) ieh0 + (adv - icv_size)); - clib_memcpy_fast (oeh0, ieh0, sizeof (ethernet_header_t)); + const u32 l2_len = vnet_buffer (b[0])->ip.save_rewrite_length; + u8 *l2_hdr_in = (u8 *) vlib_buffer_get_current (b[0]) - l2_len; + + u8 *l2_hdr_out = l2_hdr_in + adv - icv_size; + + clib_memcpy_le32 (l2_hdr_out, l2_hdr_in, l2_len); } vlib_buffer_advance (b[0], adv - icv_size); @@ -232,10 +247,20 @@ ah_encrypt_inline (vlib_main_t * vm, ip_hdr_size = sizeof (ip6_header_t); oh6_0 = vlib_buffer_get_current (b[0]); pd->current_data = b[0]->current_data; - pd->hop_limit = ih6_0->ip6.hop_limit; - pd->ip_version_traffic_class_and_flow_label = + + oh6_0->ip6.ip_version_traffic_class_and_flow_label = ih6_0->ip6.ip_version_traffic_class_and_flow_label; + + if (PREDICT_FALSE (ipsec_sa_is_set_IS_TUNNEL (sa0))) + { + ip6_set_dscp_network_order (&oh6_0->ip6, sa0->tunnel.t_dscp); + tunnel_encap_fixup_6o6 (sa0->tunnel_flags, &ih6_0->ip6, + &oh6_0->ip6); + } + pd->ip_version_traffic_class_and_flow_label = + oh6_0->ip6.ip_version_traffic_class_and_flow_label; + if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0))) { next_hdr_type = IP_PROTOCOL_IPV6; @@ -261,8 +286,31 @@ ah_encrypt_inline (vlib_main_t * vm, { ip_hdr_size = sizeof (ip4_header_t); oh0 = vlib_buffer_get_current (b[0]); - clib_memset (oh0, 0, sizeof (ip4_and_ah_header_t)); + pd->ttl = ih0->ip4.ttl; + + if (PREDICT_FALSE (ipsec_sa_is_set_IS_TUNNEL (sa0))) + { + if (sa0->tunnel.t_dscp) + pd->tos = sa0->tunnel.t_dscp << 2; + else + { + pd->tos = ih0->ip4.tos; + + if (!(sa0->tunnel_flags & + TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP)) + pd->tos &= 0x3; + if (!(sa0->tunnel_flags & + TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_ECN)) + pd->tos &= 0xfc; + } + } + else + { + pd->tos = ih0->ip4.tos; + } + pd->current_data = b[0]->current_data; + clib_memset (oh0, 0, sizeof (ip4_and_ah_header_t)); if (PREDICT_TRUE (ipsec_sa_is_set_IS_TUNNEL (sa0))) { @@ -292,7 +340,7 @@ ah_encrypt_inline (vlib_main_t * vm, { clib_memcpy_fast (&oh0->ip4.address_pair, &sa0->ip4_hdr.address_pair, - sizeof (ip4_address_t)); + sizeof (ip4_address_pair_t)); next[0] = sa0->dpo.dpoi_next_node; vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = sa0->dpo.dpoi_index; @@ -337,6 +385,18 @@ ah_encrypt_inline (vlib_main_t * vm, } next: + if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + sa0 = ipsec_sa_get (pd->sa_index); + ah_encrypt_trace_t *tr = + vlib_add_trace (vm, node, b[0], sizeof (*tr)); + tr->spi = sa0->spi; + tr->seq_lo = sa0->seq; + tr->seq_hi = sa0->seq_hi; + tr->integ_alg = sa0->integ_alg; + tr->sa_index = pd->sa_index; + } + n_left -= 1; next += 1; pd += 1; @@ -359,7 +419,7 @@ ah_encrypt_inline (vlib_main_t * vm, while (n_left) { if (pd->skip) - goto trace; + goto next_pkt; if (is_ip6) { @@ -376,19 +436,7 @@ ah_encrypt_inline (vlib_main_t * vm, oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4); } - trace: - if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) - { - sa0 = vec_elt_at_index (im->sad, pd->sa_index); - ah_encrypt_trace_t *tr = - vlib_add_trace (vm, node, b[0], sizeof (*tr)); - tr->spi = sa0->spi; - tr->seq_lo = sa0->seq; - tr->seq_hi = sa0->seq_hi; - tr->integ_alg = sa0->integ_alg; - tr->sa_index = pd->sa_index; - } - + next_pkt: n_left -= 1; next += 1; pd += 1; @@ -420,9 +468,9 @@ VLIB_REGISTER_NODE (ah4_encrypt_node) = { .n_next_nodes = AH_ENCRYPT_N_NEXT, .next_nodes = { -#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n, - foreach_ah_encrypt_next -#undef _ + [AH_ENCRYPT_NEXT_DROP] = "ip4-drop", + [AH_ENCRYPT_NEXT_HANDOFF] = "ah4-encrypt-handoff", + [AH_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output", }, }; /* *INDENT-ON* */ @@ -446,13 +494,32 @@ VLIB_REGISTER_NODE (ah6_encrypt_node) = { .n_next_nodes = AH_ENCRYPT_N_NEXT, .next_nodes = { -#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n, - foreach_ah_encrypt_next -#undef _ + [AH_ENCRYPT_NEXT_DROP] = "ip6-drop", + [AH_ENCRYPT_NEXT_HANDOFF] = "ah6-encrypt-handoff", + [AH_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output", }, }; /* *INDENT-ON* */ +#ifndef CLIB_MARCH_VARIANT + +static clib_error_t * +ah_encrypt_init (vlib_main_t *vm) +{ + ipsec_main_t *im = &ipsec_main; + + im->ah4_enc_fq_index = + vlib_frame_queue_main_init (ah4_encrypt_node.index, 0); + im->ah6_enc_fq_index = + vlib_frame_queue_main_init (ah6_encrypt_node.index, 0); + + return 0; +} + +VLIB_INIT_FUNCTION (ah_encrypt_init); + +#endif + /* * fd.io coding-style-patch-verification: ON *