Line data Source code
1 : /*
2 : * srv6_t_m_gtp4_d.c
3 : *
4 : * Copyright (c) 2019 Arrcus Inc 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/adj/adj.h>
20 : #include <vnet/plugin/plugin.h>
21 : #include <vpp/app/version.h>
22 : #include <srv6-mobile/mobile.h>
23 :
24 : srv6_t_main_v4_decap_t srv6_t_main_v4_decap;
25 :
26 : static void
27 9 : clb_dpo_lock_srv6_t_m_gtp4_d (dpo_id_t * dpo)
28 : {
29 9 : }
30 :
31 : static void
32 6 : clb_dpo_unlock_srv6_t_m_gtp4_d (dpo_id_t * dpo)
33 : {
34 6 : }
35 :
36 : static u8 *
37 0 : clb_dpo_format_srv6_t_m_gtp4_d (u8 * s, va_list * args)
38 : {
39 0 : index_t index = va_arg (*args, index_t);
40 0 : CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
41 :
42 0 : return (format (s, "SR: dynamic_proxy_index:[%u]", index));
43 : }
44 :
45 : const static dpo_vft_t dpo_vft = {
46 : .dv_lock = clb_dpo_lock_srv6_t_m_gtp4_d,
47 : .dv_unlock = clb_dpo_unlock_srv6_t_m_gtp4_d,
48 : .dv_format = clb_dpo_format_srv6_t_m_gtp4_d,
49 : };
50 :
51 : const static char *const srv6_t_m_gtp4_d_nodes[] = {
52 : "srv6-t-m-gtp4-d",
53 : NULL,
54 : };
55 :
56 : const static char *const srv6_t_m_gtp4_d_v6_nodes[] = {
57 : "error-drop",
58 : NULL,
59 : };
60 :
61 : const static char *const *const dpo_nodes[DPO_PROTO_NUM] = {
62 : [DPO_PROTO_IP6] = srv6_t_m_gtp4_d_v6_nodes,
63 : [DPO_PROTO_IP4] = srv6_t_m_gtp4_d_nodes,
64 : };
65 :
66 : static u8 fn_name[] = "SRv6-T.M.GTP4.D-plugin";
67 : static u8 keyword_str[] = "t.m.gtp4.d";
68 : static u8 def_str[] =
69 : "Transit function with decapsulation for IPv4/GTP tunnel";
70 : static u8 param_str[] =
71 : "<sr-prefix>/<sr-prefixlen> v6src_prefix <v6src_prefix>/<prefixlen> [nhtype "
72 : "<nhtype>] fib-table <id>";
73 :
74 : static u8 *
75 0 : clb_format_srv6_t_m_gtp4_d (u8 * s, va_list * args)
76 : {
77 0 : srv6_end_gtp4_d_param_t *ls_mem = va_arg (*args, void *);
78 :
79 0 : s = format (s, "SRv6 T.M.GTP4.D\n\t");
80 :
81 : s =
82 0 : format (s, "SR Prefix: %U/%d, ", format_ip6_address, &ls_mem->sr_prefix,
83 : ls_mem->sr_prefixlen);
84 :
85 : s =
86 0 : format (s, "v6src Prefix: %U/%d", format_ip6_address,
87 : &ls_mem->v6src_prefix, ls_mem->v6src_prefixlen);
88 :
89 0 : if (ls_mem->nhtype != SRV6_NHTYPE_NONE)
90 : {
91 0 : if (ls_mem->nhtype == SRV6_NHTYPE_IPV4)
92 0 : s = format (s, ", NHType IPv4");
93 0 : else if (ls_mem->nhtype == SRV6_NHTYPE_IPV6)
94 0 : s = format (s, ", NHType IPv6");
95 0 : else if (ls_mem->nhtype == SRV6_NHTYPE_NON_IP)
96 0 : s = format (s, ", NHType Non-IP");
97 : else
98 0 : s = format (s, ", NHType Unknow(%d)", ls_mem->nhtype);
99 : }
100 :
101 0 : s = format (s, ", FIB table %d", ls_mem->fib_table);
102 :
103 0 : s = format (s, ", Drop In %d\n", ls_mem->drop_in);
104 :
105 0 : return s;
106 : }
107 :
108 : static uword
109 1 : clb_unformat_srv6_t_m_gtp4_d (unformat_input_t * input, va_list * args)
110 : {
111 1 : void **plugin_mem_p = va_arg (*args, void **);
112 : srv6_end_gtp4_d_param_t *ls_mem;
113 : ip6_address_t sr_prefix;
114 : u32 sr_prefixlen;
115 : ip6_address_t v6src_prefix;
116 : u32 v6src_prefixlen;
117 1 : u32 fib_table = 0;
118 1 : bool drop_in = false;
119 1 : u8 nhtype = SRV6_NHTYPE_NONE;
120 1 : bool config = false;
121 :
122 3 : while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
123 : {
124 2 : if (unformat (
125 : input,
126 : "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype ipv4 fib-table %d",
127 : unformat_ip6_address, &sr_prefix, &sr_prefixlen,
128 : unformat_ip6_address, &v6src_prefix, &v6src_prefixlen, &fib_table))
129 : {
130 0 : config = true;
131 0 : nhtype = SRV6_NHTYPE_IPV4;
132 : }
133 2 : else if (unformat (input,
134 : "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype ipv6 "
135 : "fib-table %d",
136 : unformat_ip6_address, &sr_prefix, &sr_prefixlen,
137 : unformat_ip6_address, &v6src_prefix, &v6src_prefixlen,
138 : &fib_table))
139 : {
140 1 : config = true;
141 1 : nhtype = SRV6_NHTYPE_IPV6;
142 : }
143 1 : else if (unformat (
144 : input, "t.m.gtp4.d %U/%d v6src_prefix %U/%d nhtype non-ip",
145 : unformat_ip6_address, &sr_prefix, &sr_prefixlen,
146 : unformat_ip6_address, &v6src_prefix, &v6src_prefixlen))
147 : {
148 0 : config = true;
149 0 : nhtype = SRV6_NHTYPE_NON_IP;
150 : }
151 1 : else if (unformat (input,
152 : "t.m.gtp4.d %U/%d v6src_prefix %U/%d fib-table %d",
153 : unformat_ip6_address, &sr_prefix, &sr_prefixlen,
154 : unformat_ip6_address, &v6src_prefix, &v6src_prefixlen,
155 : &fib_table))
156 : {
157 0 : config = true;
158 0 : nhtype = SRV6_NHTYPE_NONE;
159 : }
160 1 : else if (unformat (input, "drop-in"))
161 : {
162 1 : drop_in = true;
163 : }
164 : else
165 : {
166 0 : return 0;
167 : }
168 : }
169 :
170 1 : if (!config)
171 : {
172 0 : return 0;
173 : }
174 :
175 1 : ls_mem = clib_mem_alloc (sizeof *ls_mem);
176 1 : clib_memset (ls_mem, 0, sizeof *ls_mem);
177 1 : *plugin_mem_p = ls_mem;
178 :
179 1 : ls_mem->sr_prefix = sr_prefix;
180 1 : ls_mem->sr_prefixlen = sr_prefixlen;
181 :
182 1 : ls_mem->v6src_prefix = v6src_prefix;
183 1 : ls_mem->v6src_prefixlen = v6src_prefixlen;
184 :
185 1 : ls_mem->nhtype = nhtype;
186 :
187 1 : ls_mem->drop_in = drop_in;
188 :
189 1 : ls_mem->fib_table = fib_table;
190 1 : ls_mem->fib4_index = ip4_fib_index_from_table_id (fib_table);
191 1 : ls_mem->fib6_index = ip6_fib_index_from_table_id (fib_table);
192 :
193 1 : return 1;
194 : }
195 :
196 : static int
197 1 : clb_creation_srv6_t_m_gtp4_d (ip6_sr_policy_t * sr_policy)
198 : {
199 1 : return 0;
200 : }
201 :
202 : static int
203 0 : clb_removal_srv6_t_m_gtp4_d (ip6_sr_policy_t * sr_policy)
204 : {
205 : srv6_end_gtp4_d_param_t *ls_mem;
206 :
207 0 : ls_mem = (srv6_end_gtp4_d_param_t *) sr_policy->plugin_mem;
208 :
209 0 : clib_mem_free (ls_mem);
210 :
211 0 : return 0;
212 : }
213 :
214 : static clib_error_t *
215 575 : srv6_t_m_gtp4_d_init (vlib_main_t * vm)
216 : {
217 575 : srv6_t_main_v4_decap_t *sm = &srv6_t_main_v4_decap;
218 : ip6_header_t *ip6;
219 : dpo_type_t dpo_type;
220 : vlib_node_t *node;
221 : int rc;
222 :
223 575 : sm->vlib_main = vm;
224 575 : sm->vnet_main = vnet_get_main ();
225 :
226 575 : node = vlib_get_node_by_name (vm, (u8 *) "srv6-t-m-gtp4-d");
227 575 : sm->t_m_gtp4_d_node_index = node->index;
228 :
229 575 : node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
230 575 : sm->error_node_index = node->index;
231 :
232 575 : ip6 = &sm->cache_hdr;
233 :
234 575 : clib_memset_u8 (ip6, 0, sizeof (ip6_header_t));
235 :
236 : // IPv6 header (default)
237 575 : ip6->ip_version_traffic_class_and_flow_label = 0x60;
238 575 : ip6->hop_limit = 64;
239 575 : ip6->protocol = IP_PROTOCOL_IPV6;
240 :
241 575 : dpo_type = dpo_register_new_type (&dpo_vft, dpo_nodes);
242 :
243 575 : rc = sr_policy_register_function (vm, fn_name, keyword_str, def_str, param_str, 128, //prefix len
244 : &dpo_type,
245 : clb_format_srv6_t_m_gtp4_d,
246 : clb_unformat_srv6_t_m_gtp4_d,
247 : clb_creation_srv6_t_m_gtp4_d,
248 : clb_removal_srv6_t_m_gtp4_d);
249 575 : if (rc < 0)
250 0 : clib_error_return (0, "SRv6 Transit GTP4.D Policy function"
251 : "couldn't be registered");
252 575 : return 0;
253 : }
254 :
255 : /* *INDENT-OFF* */
256 14399 : VNET_FEATURE_INIT (srv6_t_m_gtp4_d, static) =
257 : {
258 : .arc_name = "ip4-unicast",
259 : .node_name = "srv6-t-m-gtp4-d",
260 : .runs_before = 0,
261 : };
262 :
263 1151 : VLIB_INIT_FUNCTION (srv6_t_m_gtp4_d_init);
264 : /* *INDENT-ON* */
265 :
266 : /*
267 : * fd.io coding-style-patch-verification: ON
268 : *
269 : * Local Variables:
270 : * eval: (c-set-style "gnu")
271 : * End:
272 : */
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