tests/random-test-server.c

   1 /*
   2  * Copyright © Stéphane Raimbault <stephane.raimbault@gmail.com>
   3  *
   4  * SPDX-License-Identifier: BSD-3-Clause
   5  */
   6
   7 #include <stdio.h>
   8 #ifndef _MSC_VER
   9 #include <unistd.h>
  10 #endif
  11 #include <errno.h>
  12 #include <stdlib.h>
  13
  14 #include <modbus.h>
  15
  16 int main(void)
  17 {
  18     int s = -1;
  19     modbus_t *ctx;
  20     modbus_mapping_t *mb_mapping;
  21
  22     ctx = modbus_new_tcp("127.0.0.1", 1502);
  23     /* modbus_set_debug(ctx, TRUE); */
  24
  25     mb_mapping = modbus_mapping_new(500, 500, 500, 500);
  26     if (mb_mapping == NULL) {
  27         fprintf(stderr, "Failed to allocate the mapping: %s\n", modbus_strerror(errno));
  28         modbus_free(ctx);
  29         return -1;
  30     }
  31
  32     s = modbus_tcp_listen(ctx, 1);
  33     modbus_tcp_accept(ctx, &s);
  34
  35     for (;;) {
  36         uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH];
  37         int rc;
  38
  39         rc = modbus_receive(ctx, query);
  40         if (rc > 0) {
  41             /* rc is the query size */
  42             modbus_reply(ctx, query, rc, mb_mapping);
  43         } else if (rc == -1) {
  44             /* Connection closed by the client or error */
  45             break;
  46         }
  47     }
  48
  49     printf("Quit the loop: %s\n", modbus_strerror(errno));
  50
  51     if (s != -1) {
  52         close(s);
  53     }
  54     modbus_mapping_free(mb_mapping);
  55     modbus_close(ctx);
  56     modbus_free(ctx);
  57
  58     return 0;
  59 }