aboutsummaryrefslogtreecommitdiffstats
path: root/vnfs/VESreporting_vLB/vpp_measurement_reporter.c
blob: 1a1e7ac883e3df5fe643e6ff3366c3de67316146 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
/*************************************************************************//**
 *
 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ****************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <math.h>

#include "evel.h"

#define BUFSIZE 128
#define READ_INTERVAL 10

typedef struct dummy_vpp_metrics_struct {
  int bytes_in;
  int bytes_out;
  int packets_in;
  int packets_out;
} vpp_metrics_struct;

void read_vpp_metrics(vpp_metrics_struct *, char *);

int main(int argc, char** argv)
{
  EVEL_ERR_CODES evel_rc = EVEL_SUCCESS;
  EVENT_MEASUREMENT* vpp_m = NULL;
  EVENT_HEADER* vpp_m_header = NULL;
  int bytes_in_this_round;
  int bytes_out_this_round;
  int packets_in_this_round;
  int packets_out_this_round;
  vpp_metrics_struct* last_vpp_metrics = malloc(sizeof(vpp_metrics_struct));
  vpp_metrics_struct* curr_vpp_metrics = malloc(sizeof(vpp_metrics_struct));
  struct timeval time_val;
  time_t start_epoch;
  time_t last_epoch;
  char hostname[BUFSIZE];
  char* fqdn = argv[1];
  int port = atoi(argv[2]);
  char* vnic = argv[3];

  printf("\nVector Packet Processing (VPP) measurement collection\n");
  fflush(stdout);

  if (argc != 4)
  {
    fprintf(stderr, "Usage: %s <FQDN>|<IP address> <port> <interface>\n", argv[0]);
    exit(-1);
  }

  /**************************************************************************/
  /* Initialize                                                             */
  /**************************************************************************/
  if(evel_initialize(fqdn,                         /* FQDN                  */
                     port, 	                   /* Port                  */
                     NULL,                         /* optional path         */
                     NULL,                         /* optional topic        */
                     0,                            /* HTTPS?                */
                     "",                           /* Username              */
                     "",                           /* Password              */
                     EVEL_SOURCE_VIRTUAL_MACHINE,  /* Source type           */
                     "vLoadBalancer",              /* Role                  */
                     1))                           /* Verbosity             */
  {
    fprintf(stderr, "\nFailed to initialize the EVEL library!!!\n");
    exit(-1);
  }
  else
  {
    printf("\nInitialization completed\n");
  }

  gethostname(hostname, BUFSIZE);
  memset(last_vpp_metrics, 0, sizeof(vpp_metrics_struct));
  read_vpp_metrics(last_vpp_metrics, vnic);
  gettimeofday(&time_val, NULL);
  start_epoch = time_val.tv_sec * 1000000 + time_val.tv_usec;
  sleep(READ_INTERVAL);

  /***************************************************************************/
  /* Collect metrics from the VNIC                                           */
  /***************************************************************************/
  while(1) {
    // Read the number of vDNSs currently active
    int active_dns = 0;
    FILE* fd = fopen("active_dns.txt", "r");
    while(!feof(fd)) {
      if(fscanf(fd, "%d", &active_dns) != 1) /* Avoid infinite loops if the file doesn't contain exactly one number */
        break;
    }

    if(fclose(fd))  {
      printf("Error when closing file\n");
      return 1;
    }

    memset(curr_vpp_metrics, 0, sizeof(vpp_metrics_struct));
    read_vpp_metrics(curr_vpp_metrics, vnic);

    if(active_dns > 0 && (curr_vpp_metrics->bytes_in - last_vpp_metrics->bytes_in > 0)) {
      bytes_in_this_round = (int) round((curr_vpp_metrics->bytes_in - last_vpp_metrics->bytes_in) / active_dns);
    }
    else {
      bytes_in_this_round = 0;
    }
    if(active_dns > 0 && (curr_vpp_metrics->bytes_out - last_vpp_metrics->bytes_out > 0)) {
      bytes_out_this_round = (int) round((curr_vpp_metrics->bytes_out - last_vpp_metrics->bytes_out) / active_dns);
    }
    else {
      bytes_out_this_round = 0;
    }
    if(active_dns > 0 && (curr_vpp_metrics->packets_in - last_vpp_metrics->packets_in > 0)) {
      packets_in_this_round = (int) round((curr_vpp_metrics->packets_in - last_vpp_metrics->packets_in) / active_dns);
    }
    else {
      packets_in_this_round = 0;
    }
    if(active_dns > 0 && (curr_vpp_metrics->packets_out - last_vpp_metrics->packets_out > 0)) {
      packets_out_this_round = (int) round((curr_vpp_metrics->packets_out - last_vpp_metrics->packets_out) / active_dns);
    }
    else {
      packets_out_this_round = 0;
    }

    vpp_m = evel_new_measurement(READ_INTERVAL);

    if(vpp_m != NULL) {
      printf("New measurement report created...\n");
      evel_measurement_vnic_use_add(vpp_m,		/* Pointer to the measurement      */ 
  			             vnic, 		/* ASCII string with the vNIC's ID */
	            packets_in_this_round, 		/* Packets received      	   */
	           packets_out_this_round,		/* Packets transmitted   	   */
                                        0,		/* Broadcast packets received      */
                                        0,		/* Broadcast packets transmitted   */
		      bytes_in_this_round,		/* Total bytes received            */
		     bytes_out_this_round, 		/* Total bytes transmitted         */
				        0, 		/* Multicast packets received      */
				        0, 		/* Multicast packets transmitted   */
				        0, 		/* Unicast packets received        */
      				        0);		/* Unicast packets transmitted     */

      /***************************************************************************/
      /* Set parameters in the MEASUREMENT header packet                         */
      /***************************************************************************/
      last_epoch = start_epoch + READ_INTERVAL * 1000000;
      vpp_m_header = (EVENT_HEADER *)vpp_m;
      vpp_m_header->start_epoch_microsec = start_epoch;
      vpp_m_header->last_epoch_microsec = last_epoch;
      strcpy(vpp_m_header->reporting_entity_id.value, "No UUID available");
      strcpy(vpp_m_header->reporting_entity_name, hostname);
      evel_rc = evel_post_event(vpp_m_header);

      if(evel_rc == EVEL_SUCCESS) {
        printf("Measurement report correctly sent to the collector!\n");
      }
      else {
        printf("Post failed %d (%s)\n", evel_rc, evel_error_string());
      }
    }
    else {
      printf("New measurement report failed (%s)\n", evel_error_string());
    }

    last_vpp_metrics->bytes_in = curr_vpp_metrics->bytes_in;
    last_vpp_metrics->bytes_out = curr_vpp_metrics->bytes_out;
    last_vpp_metrics->packets_in = curr_vpp_metrics->packets_in;
    last_vpp_metrics->packets_out = curr_vpp_metrics->packets_out;
    gettimeofday(&time_val, NULL);
    start_epoch = time_val.tv_sec * 1000000 + time_val.tv_usec;

    sleep(READ_INTERVAL);
  }

  /***************************************************************************/
  /* Terminate                                                               */
  /***************************************************************************/
  sleep(1);
  free(last_vpp_metrics);
  free(curr_vpp_metrics);
  evel_terminate();
  printf("Terminated\n");

  return 0;
}

void read_vpp_metrics(vpp_metrics_struct *vpp_metrics, char *vnic) {
  // Define an array of char that contains the parameters of the unix 'cut' command
  char* params[] = {"-f3", "-f11", "-f4", "-f12"};
  // Define the unix command to execute in order to read metrics from the vNIC
  char* cmd_prefix = "sudo cat /proc/net/dev | grep \"";
  char* cmd_mid = "\" | tr -s \' \' | cut -d\' \' ";
  char cmd[BUFSIZE];
  // Define other variables
  char buf[BUFSIZE];		/* buffer used to store VPP metrics 	*/
  int temp[] = {0, 0, 0, 0};	/* temp array that contains VPP values 	*/
  FILE *fp;			/* file descriptor to pipe cmd to shell */
  int i;

  for(i = 0; i < 4; i++) {
    // Clear buffers
    memset(buf, 0, BUFSIZE);
    memset(cmd, 0, BUFSIZE);
    // Build shell command to read metrics from the vNIC
    strcat(cmd, cmd_prefix);
    strcat(cmd, vnic);
    strcat(cmd, cmd_mid);
    strcat(cmd, params[i]);
    
    // Open a pipe and read VPP values
    if ((fp = popen(cmd, "r")) == NULL) {
      printf("Error opening pipe!\n");
      return;
    }

    while (fgets(buf, BUFSIZE, fp) != NULL);
    temp[i] = atoi(buf);

    if(pclose(fp))  {
      printf("Command not found or exited with error status\n");
      return;
    }
  }

  // Store metrics read from the vNIC in the struct passed from the main function
  vpp_metrics->bytes_in = temp[0];
  vpp_metrics->bytes_out = temp[1];
  vpp_metrics->packets_in = temp[2];
  vpp_metrics->packets_out = temp[3];
}