src/plugins/acl/l2sess.c

   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  *------------------------------------------------------------------
  17  * l2sess.c - simple MAC-swap API / debug CLI handling
  18  *------------------------------------------------------------------
  19  */
  20
  21 #include <vnet/vnet.h>
  22 #include <vnet/plugin/plugin.h>
  23 #include <acl/l2sess.h>
  24
  25 #include <vlibapi/api.h>
  26 #include <vlibmemory/api.h>
  27 #include <vlibsocket/api.h>
  28 #include <vppinfra/timing_wheel.h>
  29
  30 #include <vnet/l2/l2_output.h>
  31 #include <vnet/l2/l2_input.h>
  32
  33 void
  34 l2sess_init_next_features_input (vlib_main_t * vm, l2sess_main_t * sm)
  35 {
  36 #define _(node_name, node_var, is_out, is_ip6, is_track) \
  37   if (!is_out) feat_bitmap_init_next_nodes(vm, node_var.index, L2INPUT_N_FEAT,  l2input_get_feat_names (), sm->node_var ## _input_next_node_index);
  38   foreach_l2sess_node
  39 #undef _
  40 }
  41
  42 void
  43 l2sess_add_our_next_nodes (vlib_main_t * vm, l2sess_main_t * sm,
  44                            u8 * prev_node_name, int add_output_nodes)
  45 {
  46   vlib_node_t *n;
  47   n = vlib_get_node_by_name (vm, prev_node_name);
  48 #define _(node_name, node_var, is_out, is_ip6, is_track) \
  49   if (is_out == add_output_nodes) { \
  50     u32 idx = vlib_node_add_next_with_slot(vm, n->index, node_var.index, ~0); \
  51     if (is_track) { \
  52       sm->next_slot_track_node_by_is_ip6_is_out[is_ip6][is_out] = idx; \
  53     } \
  54   }
  55   foreach_l2sess_node
  56 #undef _
  57 }
  58
  59 void
  60 l2sess_setup_nodes (void)
  61 {
  62   vlib_main_t *vm = vlib_get_main ();
  63   l2sess_main_t *sm = &l2sess_main;
  64
  65   l2sess_init_next_features_input (vm, sm);
  66
  67   l2sess_add_our_next_nodes (vm, sm, (u8 *) "l2-input-classify", 0);
  68   l2sess_add_our_next_nodes (vm, sm, (u8 *) "l2-output-classify", 1);
  69
  70 }
  71
  72 static char *
  73 get_l4_proto_str (int is_ip6, uint8_t l4_proto)
  74 {
  75   switch (l4_proto)
  76     {
  77     case 6:
  78       return "tcp";
  79     case 17:
  80       return "udp";
  81     case 1:
  82       return "icmp";
  83     case 58:
  84       return "icmp6";
  85     default:
  86       return "<?l4-unknown?>";
  87     }
  88 }
  89
  90 static clib_error_t *
  91 l2sess_show_command_fn (vlib_main_t * vm,
  92                         unformat_input_t * input, vlib_cli_command_t * cmd)
  93 {
  94   l2sess_main_t *sm = &l2sess_main;
  95   clib_time_t *ct = &vm->clib_time;
  96   l2s_session_t *s;
  97   u64 now = clib_cpu_time_now ();
  98
  99   vlib_cli_output (vm, "Timing wheel info: \n%U", format_timing_wheel,
 100                    &sm->timing_wheel, 255);
 101
 102   pool_foreach (s, sm->sessions, (
 103                                    {
 104                                    f64 ctime =
 105                                    (now -
 106                                     s->create_time) * ct->seconds_per_clock;
 107                                    f64 atime0 =
 108                                    (now -
 109                                     s->side[0].active_time) *
 110                                    ct->seconds_per_clock;
 111                                    f64 atime1 =
 112                                    (now -
 113                                     s->side[1].active_time) *
 114                                    ct->seconds_per_clock;
 115 /*
 116     f64 ctime = (s->create_time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock;
 117     f64 atime0 = (s->side[0].active_time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock;
 118     f64 atime1 = (s->side[1].active_time - vm->cpu_time_main_loop_start) * ct->seconds_per_clock;
 119 */
 120                                    u8 * out0 =
 121                                    format (0,
 122                                            "%5d: create time: %U pkts/bytes/active time: [ %ld %ld %U : %ld %ld %U ]\n",
 123                                            (s - sm->sessions),
 124                                            format_time_interval, "h:m:s:u",
 125                                            ctime, s->side[0].n_packets,
 126                                            s->side[0].n_bytes,
 127                                            format_time_interval, "h:m:s:u",
 128                                            atime0, s->side[1].n_packets,
 129                                            s->side[1].n_bytes,
 130                                            format_time_interval, "h:m:s:u",
 131                                            atime1); u8 * out1 = 0;
 132                                    if (s->is_ip6)
 133                                    {
 134                                    out1 =
 135                                    format (0, "%s %U :%u <-> %U :%u",
 136                                            get_l4_proto_str (s->is_ip6,
 137                                                              s->l4_proto),
 138                                            format_ip6_address,
 139                                            &s->side[0].addr.ip6,
 140                                            s->side[0].port,
 141                                            format_ip6_address,
 142                                            &s->side[1].addr.ip6,
 143                                            s->side[1].port);}
 144                                    else
 145                                    {
 146                                    out1 =
 147                                    format (0, "%s %U :%u <-> %U :%u",
 148                                            get_l4_proto_str (s->is_ip6,
 149                                                              s->l4_proto),
 150                                            format_ip4_address,
 151                                            &s->side[0].addr.ip4,
 152                                            s->side[0].port,
 153                                            format_ip4_address,
 154                                            &s->side[1].addr.ip4,
 155                                            s->side[1].port);}
 156                                    vlib_cli_output (vm, "%s       %s", out0,
 157                                                     out1); vec_free (out0);
 158                                    vec_free (out1);}
 159                 ));
 160   return 0;
 161 }
 162
 163 static clib_error_t *
 164 l2sess_show_count_command_fn (vlib_main_t * vm,
 165                               unformat_input_t * input,
 166                               vlib_cli_command_t * cmd)
 167 {
 168   l2sess_main_t *sm = &l2sess_main;
 169
 170   vlib_cli_output (vm, "Timing wheel info: \n%U", format_timing_wheel,
 171                    &sm->timing_wheel, 255);
 172   vlib_cli_output (vm, "session pool len: %d, pool elts: %d",
 173                    pool_len (sm->sessions), pool_elts (sm->sessions));
 174   vlib_cli_output (vm,
 175                    "attempted to delete sessions which were already free: %d",
 176                    sm->counter_attempted_delete_free_session);
 177   return 0;
 178 }
 179
 180
 181 /* *INDENT-OFF* */
 182 VLIB_CLI_COMMAND (l2sess_show_command, static) = {
 183     .path = "show l2sess",
 184     .short_help = "show l2sess",
 185     .function = l2sess_show_command_fn,
 186 };
 187
 188 VLIB_CLI_COMMAND (l2sess_show_count_command, static) = {
 189     .path = "show l2sess count",
 190     .short_help = "show l2sess count",
 191     .function = l2sess_show_count_command_fn,
 192 };
 193 /* *INDENT-OFF* */
 194
 195 static inline u64
 196 time_sec_to_clock( clib_time_t *ct, f64 sec)
 197 {
 198   return (u64)(((f64)sec)/ct->seconds_per_clock);
 199 }
 200
 201 static clib_error_t * l2sess_init (vlib_main_t * vm)
 202 {
 203   l2sess_main_t * sm = &l2sess_main;
 204   clib_error_t * error = 0;
 205   u64 cpu_time_now = clib_cpu_time_now();
 206
 207
 208   clib_time_t *ct = &vm->clib_time;
 209   sm->udp_session_idle_timeout = time_sec_to_clock(ct, UDP_SESSION_IDLE_TIMEOUT_SEC);
 210   sm->tcp_session_idle_timeout = time_sec_to_clock(ct, TCP_SESSION_IDLE_TIMEOUT_SEC);
 211   sm->tcp_session_transient_timeout = time_sec_to_clock(ct, TCP_SESSION_TRANSIENT_TIMEOUT_SEC);
 212
 213   /* The min sched time of 10e-1 causes erroneous behavior... */
 214   sm->timing_wheel.min_sched_time = 10e-2;
 215   sm->timing_wheel.max_sched_time = 3600.0*48.0;
 216   timing_wheel_init (&sm->timing_wheel, cpu_time_now, vm->clib_time.clocks_per_second);
 217   sm->timer_wheel_next_expiring_time = 0;
 218   sm->timer_wheel_tick = time_sec_to_clock(ct, sm->timing_wheel.min_sched_time);
 219   /* Pre-allocate expired nodes. */
 220   vec_alloc (sm->data_from_advancing_timing_wheel, 32);
 221
 222   l2sess_setup_nodes();
 223   l2output_init_output_node_vec (&sm->output_next_nodes.output_node_index_vec);
 224
 225   return error;
 226 }
 227
 228 VLIB_INIT_FUNCTION (l2sess_init);
 229
 230