Line data Source code
1 : /*
2 : * Copyright (c) 2016 Cisco and/or its affiliates.
3 : * Licensed under the Apache License, Version 2.0 (the "License");
4 : * you may not use this file except in compliance with the License.
5 : * You may obtain a copy of the License at:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
9 : * Unless required by applicable law or agreed to in writing, software
10 : * distributed under the License is distributed on an "AS IS" BASIS,
11 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 : * See the License for the specific language governing permissions and
13 : * limitations under the License.
14 : */
15 : /**
16 : * @brief
17 : * The data-path object representing l3_proxying the packet, i.e. it's for-us
18 : */
19 : #include <vlib/vlib.h>
20 : #include <vnet/ip/ip.h>
21 : #include <vnet/dpo/l3_proxy_dpo.h>
22 :
23 : /**
24 : * @brief pool of all l3_proxy DPOs
25 : */
26 : l3_proxy_dpo_t *l3_proxy_dpo_pool;
27 :
28 : static l3_proxy_dpo_t *
29 0 : l3_proxy_dpo_alloc (void)
30 : {
31 : l3_proxy_dpo_t *l3p;
32 :
33 0 : pool_get_aligned(l3_proxy_dpo_pool, l3p, CLIB_CACHE_LINE_BYTES);
34 0 : clib_memset(l3p, 0, sizeof(*l3p));
35 :
36 0 : return (l3p);
37 : }
38 :
39 : static l3_proxy_dpo_t *
40 0 : l3_proxy_dpo_get_from_dpo (const dpo_id_t *dpo)
41 : {
42 0 : ASSERT(DPO_L3_PROXY == dpo->dpoi_type);
43 :
44 0 : return (l3_proxy_dpo_get(dpo->dpoi_index));
45 : }
46 :
47 :
48 : /*
49 : * l3_proxy_dpo_add_or_lock
50 : *
51 : * The next_hop address here is used for source address selection in the DP.
52 : * The local adj is added to an interface's l3_proxy prefix, the next-hop
53 : * passed here is the local prefix on the same interface.
54 : */
55 : void
56 0 : l3_proxy_dpo_add_or_lock (dpo_proto_t proto,
57 : u32 sw_if_index,
58 : dpo_id_t *dpo)
59 : {
60 : l3_proxy_dpo_t *l3p;
61 :
62 0 : l3p = l3_proxy_dpo_alloc();
63 :
64 0 : l3p->l3p_sw_if_index = sw_if_index;
65 :
66 0 : dpo_set(dpo, DPO_L3_PROXY, proto, (l3p - l3_proxy_dpo_pool));
67 0 : }
68 :
69 : static void
70 0 : l3_proxy_dpo_lock (dpo_id_t *dpo)
71 : {
72 : l3_proxy_dpo_t *l3p;
73 :
74 0 : l3p = l3_proxy_dpo_get_from_dpo(dpo);
75 0 : l3p->l3p_locks++;
76 0 : }
77 :
78 : static void
79 0 : l3_proxy_dpo_unlock (dpo_id_t *dpo)
80 : {
81 : l3_proxy_dpo_t *l3p;
82 :
83 0 : l3p = l3_proxy_dpo_get_from_dpo(dpo);
84 0 : l3p->l3p_locks--;
85 :
86 0 : if (0 == l3p->l3p_locks)
87 : {
88 0 : pool_put(l3_proxy_dpo_pool, l3p);
89 : }
90 0 : }
91 :
92 : static u32
93 0 : l3_proxy_dpo_get_urpf (const dpo_id_t *dpo)
94 : {
95 : l3_proxy_dpo_t *l3p;
96 :
97 0 : l3p = l3_proxy_dpo_get_from_dpo(dpo);
98 :
99 0 : return (l3p->l3p_sw_if_index);
100 : }
101 :
102 : static u8*
103 0 : format_l3_proxy_dpo (u8 *s, va_list *ap)
104 : {
105 0 : CLIB_UNUSED(index_t index) = va_arg(*ap, index_t);
106 0 : CLIB_UNUSED(u32 indent) = va_arg(*ap, u32);
107 0 : vnet_main_t * vnm = vnet_get_main();
108 : l3_proxy_dpo_t *l3p;
109 :
110 0 : if (pool_is_free_index(l3_proxy_dpo_pool, index))
111 : {
112 0 : return (format(s, "dpo-l3_proxy DELETED"));
113 : }
114 :
115 0 : l3p = l3_proxy_dpo_get(index);
116 :
117 0 : if (~0 != l3p->l3p_sw_if_index)
118 : {
119 0 : return (format(s, "dpo-l3_proxy: %U",
120 : format_vnet_sw_interface_name, vnm,
121 : vnet_get_sw_interface(vnm, l3p->l3p_sw_if_index)));
122 : }
123 : else
124 : {
125 0 : return (format(s, "dpo-l3-proxy"));
126 : }
127 : }
128 :
129 : static void
130 0 : l3_proxy_dpo_mem_show (void)
131 : {
132 0 : fib_show_memory_usage("L3 Proxy",
133 0 : pool_elts(l3_proxy_dpo_pool),
134 0 : pool_len(l3_proxy_dpo_pool),
135 : sizeof(l3_proxy_dpo_t));
136 0 : }
137 :
138 : const static dpo_vft_t l3_proxy_vft = {
139 : .dv_lock = l3_proxy_dpo_lock,
140 : .dv_unlock = l3_proxy_dpo_unlock,
141 : .dv_format = format_l3_proxy_dpo,
142 : .dv_get_urpf = l3_proxy_dpo_get_urpf,
143 : .dv_mem_show = l3_proxy_dpo_mem_show,
144 : };
145 :
146 : /**
147 : * @brief The per-protocol VLIB graph nodes that are assigned to a l3_proxy
148 : * object.
149 : *
150 : * this means that these graph nodes are ones from which a l3_proxy is the
151 : * parent object in the DPO-graph.
152 : */
153 : const static char* const l3_proxy_ip4_nodes[] =
154 : {
155 : "ip4-local",
156 : NULL,
157 : };
158 : const static char* const l3_proxy_ip6_nodes[] =
159 : {
160 : "ip6-local",
161 : NULL,
162 : };
163 :
164 : const static char* const * const l3_proxy_nodes[DPO_PROTO_NUM] =
165 : {
166 : [DPO_PROTO_IP4] = l3_proxy_ip4_nodes,
167 : [DPO_PROTO_IP6] = l3_proxy_ip6_nodes,
168 : [DPO_PROTO_MPLS] = NULL,
169 : };
170 :
171 : void
172 559 : l3_proxy_dpo_module_init (void)
173 : {
174 559 : dpo_register(DPO_L3_PROXY, &l3_proxy_vft, l3_proxy_nodes);
175 559 : }
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