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annotate mgw/main.c @ 126:815e4c59162e

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mgw DTMF: tone definitions and sample array generation
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 01 Oct 2022 17:09:51 -0800
parents f280328e7e2e
children f062c32a5116
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * Main module for themwi-mgw.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/errno.h>
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7 #include <stdio.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <signal.h>
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13 #include <syslog.h>
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14 #include <unistd.h>
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15
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16 fd_set select_for_read;
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17 void (*select_handlers[FD_SETSIZE])();
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18 void *select_data[FD_SETSIZE];
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19
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20 static int max_fd;
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21
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22 update_max_fd(newfd)
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23 {
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24 if (newfd >= FD_SETSIZE) {
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25 syslog(LOG_CRIT, "FATAL: file descriptor %d >= FD_SETSIZE",
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26 newfd);
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27 exit(1);
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28 }
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29 if (newfd > max_fd)
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30 max_fd = newfd;
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31 }
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32
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33 main(argc, argv)
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Mychaela Falconia <falcon@freecalypso.org>
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34 char **argv;
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Mychaela Falconia <falcon@freecalypso.org>
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35 {
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Mychaela Falconia <falcon@freecalypso.org>
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36 fd_set fds;
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Mychaela Falconia <falcon@freecalypso.org>
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37 int cc, i;
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38
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39 openlog("themwi-mgw", 0, LOG_LOCAL5);
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40 read_config_file();
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41 dtmf_init_sample_arrays();
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42 if (create_ctrl_socket() < 0) {
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43 fprintf(stderr, "error creating TMGW control socket\n");
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44 exit(1);
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45 }
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46 signal(SIGPIPE, SIG_IGN);
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Mychaela Falconia <falcon@freecalypso.org>
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47 /* main select loop */
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48 for (;;) {
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49 bcopy(&select_for_read, &fds, sizeof(fd_set));
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50 cc = select(max_fd+1, &fds, 0, 0, 0);
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51 if (cc < 0) {
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52 if (errno == EINTR)
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53 continue;
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54 syslog(LOG_CRIT, "select: %m");
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55 exit(1);
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56 }
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57 for (i = 0; cc && i <= max_fd; i++) {
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58 if (FD_ISSET(i, &fds)) {
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59 select_handlers[i](i, select_data[i]);
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60 cc--;
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61 }
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62 }
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63 free_deleted_endpoints();
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64 }
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65 }