From 1ba5bc8d888d0164dd6e38857cbed09ab7ce1d8b Mon Sep 17 00:00:00 2001 From: Kingwel Xie Date: Wed, 20 Mar 2019 07:21:58 -0400 Subject: ipsec: add ipv6 support for ipsec tunnel interface Change-Id: I6a76907dc7bed2a81282b63669bea2219d6903c9 Signed-off-by: Kingwel Xie Signed-off-by: Neale Ranns --- src/vnet/ipsec/ipsec_if_in.c | 330 +++++++++++++++++++++++++++++++------------ 1 file changed, 241 insertions(+), 89 deletions(-) (limited to 'src/vnet/ipsec/ipsec_if_in.c') diff --git a/src/vnet/ipsec/ipsec_if_in.c b/src/vnet/ipsec/ipsec_if_in.c index b12e36c4fbc..63d463bd633 100644 --- a/src/vnet/ipsec/ipsec_if_in.c +++ b/src/vnet/ipsec/ipsec_if_in.c @@ -63,8 +63,8 @@ format_ipsec_if_input_trace (u8 * s, va_list * args) always_inline uword -ipsec_if_input_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * from_frame) +ipsec_if_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * from_frame, int is_ip6) { ipsec_main_t *im = &ipsec_main; vnet_main_t *vnm = im->vnet_main; @@ -91,24 +91,32 @@ ipsec_if_input_inline (vlib_main_t * vm, u32 last_sw_if_index = ~0; u32 last_tunnel_id = ~0; - u64 last_key = ~0; + ipsec4_tunnel_key_t last_key4; + ipsec6_tunnel_key_t last_key6; vlib_combined_counter_main_t *rx_counter; vlib_combined_counter_main_t *drop_counter; + if (is_ip6) + clib_memset (&last_key6, 0xff, sizeof (last_key6)); + else + last_key4.as_u64 = ~0; + rx_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX; drop_counter = vim->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP; while (n_left_from >= 2) { u32 sw_if_index0, sw_if_index1; - ip4_header_t *ip0, *ip1; + ip4_header_t *ip40, *ip41; + ip6_header_t *ip60, *ip61; esp_header_t *esp0, *esp1; u32 len0, len1; u16 buf_adv0, buf_adv1; u32 tid0, tid1; ipsec_tunnel_if_t *t0, *t1; - u64 key0, key1; + ipsec4_tunnel_key_t key40, key41; + ipsec6_tunnel_key_t key60, key61; if (n_left_from >= 4) { @@ -118,33 +126,48 @@ ipsec_if_input_inline (vlib_main_t * vm, CLIB_PREFETCH (b[3]->data, CLIB_CACHE_LINE_BYTES, LOAD); } - ip0 = (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset); - ip1 = (ip4_header_t *) (b[1]->data + vnet_buffer (b[1])->l3_hdr_offset); + ip40 = + (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset); + ip41 = + (ip4_header_t *) (b[1]->data + vnet_buffer (b[1])->l3_hdr_offset); - /* NAT UDP port 4500 case, don't advance any more */ - if (ip0->protocol == IP_PROTOCOL_UDP) - { - esp0 = - (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0) + - sizeof (udp_header_t)); - buf_adv0 = 0; - } - else - { - esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0)); - buf_adv0 = ip4_header_bytes (ip0); - } - if (ip1->protocol == IP_PROTOCOL_UDP) + if (is_ip6) { - esp1 = - (esp_header_t *) ((u8 *) ip1 + ip4_header_bytes (ip1) + - sizeof (udp_header_t)); - buf_adv1 = 0; + ip60 = (ip6_header_t *) ip40; + ip61 = (ip6_header_t *) ip41; + esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t)); + esp1 = (esp_header_t *) ((u8 *) ip61 + sizeof (ip6_header_t)); + buf_adv0 = sizeof (ip6_header_t); + buf_adv1 = sizeof (ip6_header_t); } else { - esp1 = (esp_header_t *) ((u8 *) ip1 + ip4_header_bytes (ip1)); - buf_adv1 = ip4_header_bytes (ip1); + /* NAT UDP port 4500 case, don't advance any more */ + if (ip40->protocol == IP_PROTOCOL_UDP) + { + esp0 = + (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) + + sizeof (udp_header_t)); + buf_adv0 = 0; + } + else + { + esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40)); + buf_adv0 = ip4_header_bytes (ip40); + } + /* NAT UDP port 4500 case, don't advance any more */ + if (ip41->protocol == IP_PROTOCOL_UDP) + { + esp1 = + (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41) + + sizeof (udp_header_t)); + buf_adv1 = 0; + } + else + { + esp1 = (esp_header_t *) ((u8 *) ip41 + ip4_header_bytes (ip41)); + buf_adv1 = ip4_header_bytes (ip41); + } } vlib_buffer_advance (b[0], buf_adv0); @@ -153,27 +176,58 @@ ipsec_if_input_inline (vlib_main_t * vm, len0 = vlib_buffer_length_in_chain (vm, b[0]); len1 = vlib_buffer_length_in_chain (vm, b[1]); - key0 = (u64) ip0->src_address.as_u32 << 32 | (u64) esp0->spi; - key1 = (u64) ip1->src_address.as_u32 << 32 | (u64) esp1->spi; - - if (key0 == last_key) + if (is_ip6) { - tid0 = last_tunnel_id; + key60.remote_ip = ip60->src_address; + key60.spi = esp0->spi; + + if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0) + { + tid0 = last_tunnel_id; + } + else + { + uword *p = + hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60); + if (p) + { + tid0 = p[0]; + last_tunnel_id = tid0; + clib_memcpy_fast (&last_key6, &key60, sizeof (key60)); + } + else + { + n_no_tunnel++; + next[0] = IPSEC_INPUT_NEXT_DROP; + goto pkt1; + } + } } - else + else /* !is_ip6 */ { - uword *p = hash_get (im->ipsec_if_pool_index_by_key, key0); - if (p) + key40.remote_ip = ip40->src_address.as_u32; + key40.spi = esp0->spi; + + if (key40.as_u64 == last_key4.as_u64) { - tid0 = p[0]; - last_tunnel_id = tid0; - last_key = key0; + tid0 = last_tunnel_id; } else { - n_no_tunnel++; - next[0] = IPSEC_INPUT_NEXT_DROP; - goto pkt1; + uword *p = + hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64); + if (p) + { + tid0 = p[0]; + last_tunnel_id = tid0; + last_key4.as_u64 = key40.as_u64; + } + else + { + n_no_tunnel++; + next[0] = IPSEC_INPUT_NEXT_DROP; + goto pkt1; + } } } @@ -220,24 +274,58 @@ ipsec_if_input_inline (vlib_main_t * vm, } pkt1: - if (key1 == last_key) + if (is_ip6) { - tid1 = last_tunnel_id; + key61.remote_ip = ip61->src_address; + key61.spi = esp1->spi; + + if (memcmp (&key61, &last_key6, sizeof (last_key6)) == 0) + { + tid1 = last_tunnel_id; + } + else + { + uword *p = + hash_get_mem (im->ipsec6_if_pool_index_by_key, &key61); + if (p) + { + tid1 = p[0]; + last_tunnel_id = tid1; + clib_memcpy_fast (&last_key6, &key61, sizeof (key61)); + } + else + { + n_no_tunnel++; + next[1] = IPSEC_INPUT_NEXT_DROP; + goto trace1; + } + } } - else + else /* !is_ip6 */ { - uword *p = hash_get (im->ipsec_if_pool_index_by_key, key1); - if (p) + key41.remote_ip = ip41->src_address.as_u32; + key41.spi = esp1->spi; + + if (key41.as_u64 == last_key4.as_u64) { - tid1 = p[0]; - last_tunnel_id = tid1; - last_key = key1; + tid1 = last_tunnel_id; } else { - n_no_tunnel++; - next[1] = IPSEC_INPUT_NEXT_DROP; - goto trace1; + uword *p = + hash_get (im->ipsec4_if_pool_index_by_key, key41.as_u64); + if (p) + { + tid1 = p[0]; + last_tunnel_id = tid1; + last_key4.as_u64 = key41.as_u64; + } + else + { + n_no_tunnel++; + next[1] = IPSEC_INPUT_NEXT_DROP; + goto trace1; + } } } @@ -284,16 +372,16 @@ ipsec_if_input_inline (vlib_main_t * vm, } trace1: - if (is_trace) + if (PREDICT_FALSE (is_trace)) { - if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + if (b[0]->flags & VLIB_BUFFER_IS_TRACED) { ipsec_if_input_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); tr->spi = clib_host_to_net_u32 (esp0->spi); tr->seq = clib_host_to_net_u32 (esp0->seq); } - if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED)) + if (b[1]->flags & VLIB_BUFFER_IS_TRACED) { ipsec_if_input_trace_t *tr = vlib_add_trace (vm, node, b[1], sizeof (*tr)); @@ -310,28 +398,40 @@ ipsec_if_input_inline (vlib_main_t * vm, while (n_left_from > 0) { u32 sw_if_index0; - ip4_header_t *ip0; + ip4_header_t *ip40; + ip6_header_t *ip60; esp_header_t *esp0; u32 len0; u16 buf_adv0; u32 tid0; ipsec_tunnel_if_t *t0; - u64 key0; + ipsec4_tunnel_key_t key40; + ipsec6_tunnel_key_t key60; - ip0 = (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset); + ip40 = + (ip4_header_t *) (b[0]->data + vnet_buffer (b[0])->l3_hdr_offset); - /* NAT UDP port 4500 case, don't advance any more */ - if (ip0->protocol == IP_PROTOCOL_UDP) + if (is_ip6) { - esp0 = - (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0) + - sizeof (udp_header_t)); - buf_adv0 = 0; + ip60 = (ip6_header_t *) ip40; + esp0 = (esp_header_t *) ((u8 *) ip60 + sizeof (ip6_header_t)); + buf_adv0 = sizeof (ip6_header_t); } else { - esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0)); - buf_adv0 = ip4_header_bytes (ip0); + /* NAT UDP port 4500 case, don't advance any more */ + if (ip40->protocol == IP_PROTOCOL_UDP) + { + esp0 = + (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40) + + sizeof (udp_header_t)); + buf_adv0 = 0; + } + else + { + esp0 = (esp_header_t *) ((u8 *) ip40 + ip4_header_bytes (ip40)); + buf_adv0 = ip4_header_bytes (ip40); + } } /* stats for the tunnel include all the data after the IP header @@ -339,25 +439,58 @@ ipsec_if_input_inline (vlib_main_t * vm, vlib_buffer_advance (b[0], buf_adv0); len0 = vlib_buffer_length_in_chain (vm, b[0]); - key0 = (u64) ip0->src_address.as_u32 << 32 | (u64) esp0->spi; - if (key0 == last_key) + if (is_ip6) { - tid0 = last_tunnel_id; + key60.remote_ip = ip60->src_address; + key60.spi = esp0->spi; + + if (memcmp (&key60, &last_key6, sizeof (last_key6)) == 0) + { + tid0 = last_tunnel_id; + } + else + { + uword *p = + hash_get_mem (im->ipsec6_if_pool_index_by_key, &key60); + if (p) + { + tid0 = p[0]; + last_tunnel_id = tid0; + clib_memcpy_fast (&last_key6, &key60, sizeof (key60)); + } + else + { + n_no_tunnel++; + next[0] = IPSEC_INPUT_NEXT_DROP; + goto trace00; + } + } } - else + else /* !is_ip6 */ { - uword *p = hash_get (im->ipsec_if_pool_index_by_key, key0); - if (p) + key40.remote_ip = ip40->src_address.as_u32; + key40.spi = esp0->spi; + + if (key40.as_u64 == last_key4.as_u64) { - tid0 = p[0]; - last_tunnel_id = tid0; - last_key = key0; + tid0 = last_tunnel_id; } else { - n_no_tunnel++; - next[0] = IPSEC_INPUT_NEXT_DROP; - goto trace00; + uword *p = + hash_get (im->ipsec4_if_pool_index_by_key, key40.as_u64); + if (p) + { + tid0 = p[0]; + last_tunnel_id = tid0; + last_key4.as_u64 = key40.as_u64; + } + else + { + n_no_tunnel++; + next[0] = IPSEC_INPUT_NEXT_DROP; + goto trace00; + } } } @@ -404,9 +537,9 @@ ipsec_if_input_inline (vlib_main_t * vm, } trace00: - if (is_trace) + if (PREDICT_FALSE (is_trace)) { - if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + if (b[0]->flags & VLIB_BUFFER_IS_TRACED) { ipsec_if_input_trace_t *tr = vlib_add_trace (vm, node, b[0], sizeof (*tr)); @@ -428,12 +561,12 @@ ipsec_if_input_inline (vlib_main_t * vm, last_sw_if_index, n_packets, n_bytes); } - vlib_node_increment_counter (vm, ipsec_if_input_node.index, + vlib_node_increment_counter (vm, node->node_index, IPSEC_IF_INPUT_ERROR_RX, from_frame->n_vectors - n_disabled); - vlib_node_increment_counter (vm, ipsec_if_input_node.index, + vlib_node_increment_counter (vm, node->node_index, IPSEC_IF_INPUT_ERROR_DISABLED, n_disabled); - vlib_node_increment_counter (vm, ipsec_if_input_node.index, + vlib_node_increment_counter (vm, node->node_index, IPSEC_IF_INPUT_ERROR_NO_TUNNEL, n_no_tunnel); vlib_buffer_enqueue_to_next (vm, node, from, nexts, from_frame->n_vectors); @@ -441,16 +574,16 @@ ipsec_if_input_inline (vlib_main_t * vm, return from_frame->n_vectors; } -VLIB_NODE_FN (ipsec_if_input_node) (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * from_frame) +VLIB_NODE_FN (ipsec4_if_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) { - return ipsec_if_input_inline (vm, node, from_frame); + return ipsec_if_input_inline (vm, node, from_frame, 0 /* is_ip6 */ ); } /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ipsec_if_input_node) = { - .name = "ipsec-if-input", +VLIB_REGISTER_NODE (ipsec4_if_input_node) = { + .name = "ipsec4-if-input", .vector_size = sizeof (u32), .format_trace = format_ipsec_if_input_trace, .type = VLIB_NODE_TYPE_INTERNAL, @@ -460,6 +593,25 @@ VLIB_REGISTER_NODE (ipsec_if_input_node) = { }; /* *INDENT-ON* */ +VLIB_NODE_FN (ipsec6_if_input_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + return ipsec_if_input_inline (vm, node, from_frame, 1 /* is_ip6 */ ); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ipsec6_if_input_node) = { + .name = "ipsec6-if-input", + .vector_size = sizeof (u32), + .format_trace = format_ipsec_if_input_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + .n_errors = ARRAY_LEN(ipsec_if_input_error_strings), + .error_strings = ipsec_if_input_error_strings, + .sibling_of = "ipsec6-input-feature", +}; +/* *INDENT-ON* */ + /* * fd.io coding-style-patch-verification: ON * -- cgit 1.2.3-korg