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Last updated: Sat Feb 3 05:00:48 2007

Asterisk developer's documentation :: Codename Pineapple

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eagi-sphinx-test.c

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/*
 * Extended AGI test application
 *
 * This code is released into public domain
 * without any warranty of any kind.
 *
 */

/*! \file
 * Extended AGI test application
 *
 * This code is released into public domain
 * without any warranty of any kind.
 *
 * \ingroup agi
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/select.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

#include "asterisk.h"

#include "asterisk/compat.h"

#define AUDIO_FILENO (STDERR_FILENO + 1)

#define SPHINX_HOST "192.168.1.108"
#define SPHINX_PORT 3460

static int sphinx_sock = -1;

static int connect_sphinx(void)
{
   struct hostent *hp;
   struct sockaddr_in sin;
   int res;
   hp = gethostbyname(SPHINX_HOST);
   if (!hp) {
      fprintf(stderr, "Unable to resolve '%s'\n", SPHINX_HOST);
      return -1;
   }
   sphinx_sock = socket(PF_INET, SOCK_STREAM, 0);
   if (sphinx_sock < 0) {
      fprintf(stderr, "Unable to allocate socket: %s\n", strerror(errno));
      return -1;
   }
   memset(&sin, 0, sizeof(sin));
   sin.sin_family = AF_INET;
   sin.sin_port = htons(SPHINX_PORT);
   memcpy(&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr));
   if (connect(sphinx_sock, (struct sockaddr *)&sin, sizeof(sin))) {
      fprintf(stderr, "Unable to connect on socket: %s\n", strerror(errno));
      close(sphinx_sock);
      sphinx_sock = -1;
      return -1;
   }
   res = fcntl(sphinx_sock, F_GETFL);
   if ((res < 0) || (fcntl(sphinx_sock, F_SETFL, res | O_NONBLOCK) < 0)) {
      fprintf(stderr, "Unable to set flags on socket: %s\n", strerror(errno));
      close(sphinx_sock);
      sphinx_sock = -1;
      return -1;
   }
   return 0;
}

static int read_environment(void)
{
   char buf[256];
   char *val;
   /* Read environment */
   for(;;) {
      fgets(buf, sizeof(buf), stdin);
      if (feof(stdin))
         return -1;
      buf[strlen(buf) - 1] = '\0';
      /* Check for end of environment */
      if (!strlen(buf))
         return 0;
      val = strchr(buf, ':');
      if (!val) {
         fprintf(stderr, "Invalid environment: '%s'\n", buf);
         return -1;
      }
      *val = '\0';
      val++;
      val++;
      /* Skip space */
      fprintf(stderr, "Environment: '%s' is '%s'\n", buf, val);

      /* Load into normal environment */
      setenv(buf, val, 1);
      
   }
   /* Never reached */
   return 0;
}

static char *wait_result(void)
{
   fd_set fds;
   int res;
   int max;
   static char astresp[256];
   static char sphinxresp[256];
   char audiobuf[4096];
   for (;;) {
      FD_ZERO(&fds);
      FD_SET(STDIN_FILENO, &fds);
      FD_SET(AUDIO_FILENO, &fds);
      max = AUDIO_FILENO;
      if (sphinx_sock > -1) {
         FD_SET(sphinx_sock, &fds);
         if (sphinx_sock > max)
            max = sphinx_sock;
      }
      /* Wait for *some* sort of I/O */
      res = select(max + 1, &fds, NULL, NULL, NULL);
      if (res < 0) {
         fprintf(stderr, "Error in select: %s\n", strerror(errno));
         return NULL;
      }
      if (FD_ISSET(STDIN_FILENO, &fds)) {
         fgets(astresp, sizeof(astresp), stdin);
         if (feof(stdin)) {
            fprintf(stderr, "Got hungup on apparently\n");
            return NULL;
         }
         astresp[strlen(astresp) - 1] = '\0';
         fprintf(stderr, "Ooh, got a response from Asterisk: '%s'\n", astresp);
         return astresp;
      }
      if (FD_ISSET(AUDIO_FILENO, &fds)) {
         res = read(AUDIO_FILENO, audiobuf, sizeof(audiobuf));
         if (res > 0) {
            if (sphinx_sock > -1) 
               write(sphinx_sock, audiobuf, res);
         }
      }
      if ((sphinx_sock > -1) && FD_ISSET(sphinx_sock, &fds)) {
         res = read(sphinx_sock, sphinxresp, sizeof(sphinxresp));
         if (res > 0) {
            fprintf(stderr, "Oooh, Sphinx found a token: '%s'\n", sphinxresp);
            return sphinxresp;
         } else if (res == 0) {
            fprintf(stderr, "Hrm, lost sphinx, guess we're on our own\n");
            close(sphinx_sock);
            sphinx_sock = -1;
         }
      }
   }
      
}

static char *run_command(char *command)
{
   fprintf(stdout, "%s\n", command);
   return wait_result();
}

static int run_script(void)
{
   char *res;
   res = run_command("STREAM FILE demo-enterkeywords 0123456789*#");
   if (!res) {
      fprintf(stderr, "Failed to execute command\n");
      return -1;
   }
   fprintf(stderr, "1. Result is '%s'\n", res);
   res = run_command("STREAM FILE demo-nomatch 0123456789*#");
   if (!res) {
      fprintf(stderr, "Failed to execute command\n");
      return -1;
   }
   fprintf(stderr, "2. Result is '%s'\n", res);
   res = run_command("SAY NUMBER 23452345 0123456789*#");
   if (!res) {
      fprintf(stderr, "Failed to execute command\n");
      return -1;
   }
   fprintf(stderr, "3. Result is '%s'\n", res);
   res = run_command("GET DATA demo-enterkeywords");
   if (!res) {
      fprintf(stderr, "Failed to execute command\n");
      return -1;
   }
   fprintf(stderr, "4. Result is '%s'\n", res);
   res = run_command("STREAM FILE auth-thankyou \"\"");
   if (!res) {
      fprintf(stderr, "Failed to execute command\n");
      return -1;
   }
   fprintf(stderr, "5. Result is '%s'\n", res);
   return 0;
}

int main(int argc, char *argv[])
{
   char *tmp;
   int ver = 0;
   int subver = 0;
   /* Setup stdin/stdout for line buffering */
   setlinebuf(stdin);
   setlinebuf(stdout);
   if (read_environment()) {
      fprintf(stderr, "Failed to read environment: %s\n", strerror(errno));
      exit(1);
   }
   connect_sphinx();
   tmp = getenv("agi_enhanced");
   if (tmp) {
      if (sscanf(tmp, "%d.%d", &ver, &subver) != 2)
         ver = 0;
   }
   if (ver < 1) {
      fprintf(stderr, "No enhanced AGI services available.  Use EAGI, not AGI\n");
      exit(1);
   }
   if (run_script())
      return -1;
   exit(0);
}

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