dpdk: rework cryptodev ipsec build and setup
[vpp.git] / src / vnet / ipsec / ipsec_if_in.c
1 /*
2  * ipsec_if_in.c : IPSec interface input node
3  *
4  * Copyright (c) 2015 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  *     http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h>
20 #include <vnet/ip/ip.h>
21
22 #include <vnet/ipsec/ipsec.h>
23 #include <vnet/ipsec/esp.h>
24
25 /* Statistics (not really errors) */
26 #define foreach_ipsec_if_input_error    \
27 _(RX, "good packets received")
28
29 static char *ipsec_if_input_error_strings[] = {
30 #define _(sym,string) string,
31   foreach_ipsec_if_input_error
32 #undef _
33 };
34
35 typedef enum
36 {
37 #define _(sym,str) IPSEC_IF_INPUT_ERROR_##sym,
38   foreach_ipsec_if_input_error
39 #undef _
40     IPSEC_IF_INPUT_N_ERROR,
41 } ipsec_if_input_error_t;
42
43
44 typedef struct
45 {
46   u32 spi;
47   u32 seq;
48 } ipsec_if_input_trace_t;
49
50 u8 *
51 format_ipsec_if_input_trace (u8 * s, va_list * args)
52 {
53   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
54   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
55   ipsec_if_input_trace_t *t = va_arg (*args, ipsec_if_input_trace_t *);
56
57   s = format (s, "IPSec: spi %u seq %u", t->spi, t->seq);
58   return s;
59 }
60
61 static uword
62 ipsec_if_input_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
63                         vlib_frame_t * from_frame)
64 {
65   ipsec_main_t *im = &ipsec_main;
66   u32 *from, *to_next = 0, next_index;
67   u32 n_left_from;
68
69   from = vlib_frame_vector_args (from_frame);
70   n_left_from = from_frame->n_vectors;
71   next_index = node->cached_next_index;
72
73   while (n_left_from > 0)
74     {
75       u32 n_left_to_next;
76
77       vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
78
79       while (n_left_from > 0 && n_left_to_next > 0)
80         {
81           u32 bi0, next0;
82           vlib_buffer_t *b0;
83           ip4_header_t *ip0;
84           esp_header_t *esp0;
85           uword *p;
86
87           bi0 = to_next[0] = from[0];
88           from += 1;
89           n_left_from -= 1;
90           to_next += 1;
91           n_left_to_next -= 1;
92           b0 = vlib_get_buffer (vm, bi0);
93           ip0 = vlib_buffer_get_current (b0);
94           esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0));
95
96           next0 = IPSEC_INPUT_NEXT_DROP;
97
98           u64 key = (u64) ip0->src_address.as_u32 << 32 |
99             (u64) clib_net_to_host_u32 (esp0->spi);
100
101           p = hash_get (im->ipsec_if_pool_index_by_key, key);
102
103           if (p)
104             {
105               ipsec_tunnel_if_t *t;
106               t = pool_elt_at_index (im->tunnel_interfaces, p[0]);
107               vnet_buffer (b0)->ipsec.sad_index = t->input_sa_index;
108               vnet_buffer (b0)->ipsec.flags =
109                 t->hw_if_index == ~0 ? IPSEC_FLAG_IPSEC_GRE_TUNNEL : 0;
110               vlib_buffer_advance (b0, ip4_header_bytes (ip0));
111               next0 = im->esp_decrypt_next_index;
112             }
113
114           if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
115             {
116               ipsec_if_input_trace_t *tr =
117                 vlib_add_trace (vm, node, b0, sizeof (*tr));
118               tr->spi = clib_host_to_net_u32 (esp0->spi);
119               tr->seq = clib_host_to_net_u32 (esp0->seq);
120             }
121
122           vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
123                                            n_left_to_next, bi0, next0);
124         }
125       vlib_put_next_frame (vm, node, next_index, n_left_to_next);
126     }
127
128   vlib_node_increment_counter (vm, ipsec_if_input_node.index,
129                                IPSEC_IF_INPUT_ERROR_RX,
130                                from_frame->n_vectors);
131
132   return from_frame->n_vectors;
133 }
134
135 /* *INDENT-OFF* */
136 VLIB_REGISTER_NODE (ipsec_if_input_node) = {
137   .function = ipsec_if_input_node_fn,
138   .name = "ipsec-if-input",
139   .vector_size = sizeof (u32),
140   .format_trace = format_ipsec_if_input_trace,
141   .type = VLIB_NODE_TYPE_INTERNAL,
142
143   .n_errors = ARRAY_LEN(ipsec_if_input_error_strings),
144   .error_strings = ipsec_if_input_error_strings,
145
146   .sibling_of = "ipsec-input-ip4",
147 };
148 /* *INDENT-ON* */
149
150 VLIB_NODE_FUNCTION_MULTIARCH (ipsec_if_input_node, ipsec_if_input_node_fn)
151 /*
152  * fd.io coding-style-patch-verification: ON
153  *
154  * Local Variables:
155  * eval: (c-set-style "gnu")
156  * End:
157  */