FD.io VPP  v19.04.4-rc0-5-ge88582fac
Vector Packet Processing
ip6_ioam_pot.c
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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 #include <vlib/vlib.h>
16 #include <vnet/vnet.h>
17 #include <vnet/pg/pg.h>
18 #include <vppinfra/error.h>
19 #include <vnet/ip/ip6.h>
20 
21 #include <vppinfra/hash.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/elog.h>
24 
26 #include <ioam/lib-pot/pot_util.h>
27 
28 #define foreach_ip6_hop_by_hop_ioam_pot_stats \
29  _(PROCESSED, "Pkts with ip6 hop-by-hop pot options") \
30  _(PROFILE_MISS, "Pkts with ip6 hop-by-hop pot options but no profile set") \
31  _(PASSED, "Pkts with POT in Policy") \
32  _(FAILED, "Pkts with POT out of Policy")
33 
35 #define _(sym,string) string,
37 #undef _
38 };
39 
40 typedef enum {
41 #define _(sym,str) IP6_IOAM_POT_##sym,
43 #undef _
46 
47 typedef struct {
48  /* stats */
50 
51  /* convenience */
55 
57 
58 always_inline void
60 {
62 
63  hm->counters[counter_index] += increment;
64 }
65 
66 
67 static u8 * format_ioam_pot (u8 * s, va_list * args)
68 {
69  ioam_pot_option_t * pot0 = va_arg (*args, ioam_pot_option_t *);
70  u64 random, cumulative;
71  random = cumulative = 0;
72  if (pot0)
73  {
74  random = clib_net_to_host_u64 (pot0->random);
75  cumulative = clib_net_to_host_u64 (pot0->cumulative);
76  }
77 
78  s = format (s, "random = 0x%Lx, Cumulative = 0x%Lx, Index = 0x%x",
79  random, cumulative, pot0 ? pot0->reserved_profile_id : ~0);
80  return s;
81 }
82 
83 u8 *
85 {
86  ioam_pot_option_t *pot;
87 
88  s = format (s, " POT opt present\n");
89  pot = (ioam_pot_option_t *) opt;
90  s = format (s, " %U\n", format_ioam_pot, pot);
91  return (s);
92 }
93 
94 int
96  ip6_header_t *ip,
98 {
99  ioam_pot_option_t * pot0;
100  u64 random = 0, cumulative = 0;
101  int rv = 0;
102  u8 pot_profile_index;
103  pot_profile *pot_profile = 0, *new_profile = 0;
104  u8 pot_encap = 0;
105 
106  pot0 = (ioam_pot_option_t *) opt0;
107  pot_encap = (pot0->random == 0);
108  pot_profile_index = pot_profile_get_active_id();
109  pot_profile = pot_profile_get_active();
110  if (pot_encap && PREDICT_FALSE(!pot_profile))
111  {
112  ip6_ioam_stats_increment_counter (IP6_IOAM_POT_PROFILE_MISS, 1);
113  return(-1);
114  }
115  if (pot_encap)
116  {
117  pot0->reserved_profile_id =
118  pot_profile_index & PROFILE_ID_MASK;
119  pot_profile_incr_usage_stats(pot_profile);
120  }
121  else
122  { /* Non encap node */
123  if (PREDICT_FALSE(pot0->reserved_profile_id !=
124  pot_profile_index || pot_profile == 0))
125  {
126  /* New profile announced by encap node. */
127  new_profile =
128  pot_profile_find(pot0->reserved_profile_id);
129  if (PREDICT_FALSE(new_profile == 0 ||
130  new_profile->valid == 0))
131  {
132  ip6_ioam_stats_increment_counter (IP6_IOAM_POT_PROFILE_MISS, 1);
133  return(-1);
134  }
135  else
136  {
137  pot_profile_index = pot0->reserved_profile_id;
138  pot_profile = new_profile;
139  pot_profile_set_active(pot_profile_index);
140  pot_profile_reset_usage_stats(pot_profile);
141  }
142  }
143  pot_profile_incr_usage_stats(pot_profile);
144  }
145 
146  if (pot0->random == 0)
147  {
148  pot0->random = clib_host_to_net_u64(pot_generate_random(pot_profile));
149  pot0->cumulative = 0;
150  }
151  random = clib_net_to_host_u64(pot0->random);
152  cumulative = clib_net_to_host_u64(pot0->cumulative);
153  pot0->cumulative = clib_host_to_net_u64(
154  pot_update_cumulative(pot_profile,
155  cumulative,
156  random));
157  ip6_ioam_stats_increment_counter (IP6_IOAM_POT_PROCESSED, 1);
158 
159  return (rv);
160 }
161 
162 int
165 {
166  ioam_pot_option_t * pot0;
167  u64 random = 0;
168  u64 cumulative = 0;
169  int rv = 0;
171  u8 result = 0;
172 
173  pot0 = (ioam_pot_option_t *) opt0;
174  random = clib_net_to_host_u64(pot0->random);
175  cumulative = clib_net_to_host_u64(pot0->cumulative);
176  pot_profile = pot_profile_get_active();
177  result = pot_validate (pot_profile,
178  cumulative, random);
179 
180  if (result == 1)
181  {
182  ip6_ioam_stats_increment_counter (IP6_IOAM_POT_PASSED, 1);
183  }
184  else
185  {
186  ip6_ioam_stats_increment_counter (IP6_IOAM_POT_FAILED, 1);
187  }
188  return (rv);
189 }
190 
191 int ip6_hop_by_hop_ioam_pot_rewrite_handler (u8 *rewrite_string, u8 *rewrite_size)
192 {
193  ioam_pot_option_t * pot_option;
194  if (rewrite_string && *rewrite_size == sizeof(ioam_pot_option_t))
195  {
196  pot_option = (ioam_pot_option_t *)rewrite_string;
197  pot_option->hdr.type = HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT
199  pot_option->hdr.length = sizeof (ioam_pot_option_t) -
200  sizeof (ip6_hop_by_hop_option_t);
201  return(0);
202  }
203  return(-1);
204 }
205 
206 static clib_error_t *
208  unformat_input_t * input,
209  vlib_cli_command_t * cmd)
210 {
212  u8 *s = 0;
213  int i = 0;
214 
215  for ( i = 0; i < IP6_IOAM_POT_N_STATS; i++)
216  {
217  s = format(s, " %s - %lu\n", ip6_hop_by_hop_ioam_pot_stats_strings[i],
218  hm->counters[i]);
219  }
220 
221  vlib_cli_output(vm, "%v", s);
222  vec_free(s);
223  return 0;
224 }
225 
226 
227 VLIB_CLI_COMMAND (ip6_show_ioam_pot_cmd, static) = {
228  .path = "show ioam pot",
229  .short_help = "iOAM pot statistics",
230  .function = ip6_show_ioam_pot_cmd_fn,
231 };
232 
233 
234 static clib_error_t *
236 {
238  clib_error_t * error;
239 
241  return(error);
242 
243  hm->vlib_main = vm;
244  hm->vnet_main = vnet_get_main();
245  clib_memset(hm->counters, 0, sizeof(hm->counters));
246 
249  return (clib_error_create("registration of HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT failed"));
250 
252  sizeof(ioam_pot_option_t),
254  return (clib_error_create("registration of HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT for rewrite failed"));
255 
258  return (clib_error_create("registration of HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT POP failed"));
259 
260  return (0);
261 }
262 
264 
265 
static pot_profile * pot_profile_get_active(void)
Definition: pot_util.h:170
#define PROFILE_ID_MASK
static u8 pot_profile_get_active_id(void)
Definition: pot_util.h:164
static void ip6_ioam_stats_increment_counter(u32 counter_index, u64 increment)
Definition: ip6_ioam_pot.c:59
pot_profile * pot_profile_find(u8 id)
Definition: pot_util.c:58
vnet_main_t * vnet_get_main(void)
Definition: misc.c:47
static clib_error_t * ip6_hop_by_hop_ioam_pot_init(vlib_main_t *vm)
Definition: ip6_ioam_pot.c:235
unsigned long u64
Definition: types.h:89
clib_memset(h->entries, 0, sizeof(h->entries[0]) *entries)
int ip6_hbh_register_option(u8 option, int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt), u8 *trace(u8 *s, ip6_hop_by_hop_option_t *opt))
Definition: ip6_forward.c:2632
int ip6_hbh_ioam_proof_of_transit_handler(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt0)
Definition: ip6_ioam_pot.c:95
int i
#define foreach_ip6_hop_by_hop_ioam_pot_stats
Definition: ip6_ioam_pot.c:28
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:424
unsigned char u8
Definition: types.h:56
static int pot_profile_set_active(u8 id)
Definition: pot_util.h:148
#define HBH_OPTION_TYPE_IOAM_PROOF_OF_TRANSIT
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:163
#define always_inline
Definition: clib.h:98
int ip6_hbh_pop_register_option(u8 option, int options(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt))
int ip6_hbh_ioam_proof_of_transit_pop_handler(vlib_buffer_t *b, ip6_header_t *ip, ip6_hop_by_hop_option_t *opt0)
Definition: ip6_ioam_pot.c:163
unsigned int u32
Definition: types.h:88
#define clib_error_create(args...)
Definition: error.h:96
#define vlib_call_init_function(vm, x)
Definition: init.h:260
static char * ip6_hop_by_hop_ioam_pot_stats_strings[]
Definition: ip6_ioam_pot.c:34
ip6_ioam_pot_stats_t
Definition: ip6_ioam_pot.c:40
struct _unformat_input_t unformat_input_t
#define PREDICT_FALSE(x)
Definition: clib.h:111
ip6_hop_by_hop_ioam_pot_main_t ip6_hop_by_hop_ioam_pot_main
Definition: ip6_ioam_pot.c:56
u8 pot_validate(pot_profile *profile, u64 cumulative, u64 random)
Definition: pot_util.c:197
static u32 counter_index(vlib_main_t *vm, vlib_error_t e)
Definition: drop.c:67
u8 * ip6_hbh_ioam_proof_of_transit_trace_handler(u8 *s, ip6_hop_by_hop_option_t *opt)
Definition: ip6_ioam_pot.c:84
The fine-grained event logger allows lightweight, thread-safe event logging at minimum cost...
static u8 * format_ioam_pot(u8 *s, va_list *args)
Definition: ip6_ioam_pot.c:67
static void pot_profile_reset_usage_stats(pot_profile *pow)
Definition: pot_util.h:180
vlib_main_t * vm
Definition: buffer.c:312
#define vec_free(V)
Free vector&#39;s memory (no header).
Definition: vec.h:341
u64 pot_generate_random(pot_profile *profile)
Definition: pot_util.c:210
Usage:
Definition: pot_util.h:54
#define ARRAY_LEN(x)
Definition: clib.h:62
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:155
static clib_error_t * ip6_show_ioam_pot_cmd_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: ip6_ioam_pot.c:207
static void pot_profile_incr_usage_stats(pot_profile *pow)
Definition: pot_util.h:187
static clib_error_t * ip6_hop_by_hop_ioam_init(vlib_main_t *vm)
VLIB buffer representation.
Definition: buffer.h:102
u64 pot_update_cumulative(pot_profile *profile, u64 cumulative, u64 random)
Definition: pot_util.c:169
#define HBH_OPTION_TYPE_DATA_CHANGE_ENROUTE
int ip6_hop_by_hop_ioam_pot_rewrite_handler(u8 *rewrite_string, u8 *rewrite_size)
Definition: ip6_ioam_pot.c:191
int ip6_hbh_add_register_option(u8 option, u8 size, int rewrite_options(u8 *rewrite_string, u8 *rewrite_size))
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:762
u64 counters[ARRAY_LEN(ip6_hop_by_hop_ioam_pot_stats_strings)]
Definition: ip6_ioam_pot.c:49