Esempio n. 1
0
EXPORT_DEF int at_wait (int fd, int* ms)
{
	int exception, outfd;

	outfd = ast_waitfor_n_fd (&fd, 1, ms, &exception);

	if (outfd < 0)
	{
		outfd = 0;
	}

	return outfd;
}
Esempio n. 2
0
static struct ast_frame *bestdata_read(struct ast_modem_pvt *p)
{
	char result[256];
	short *b;
	struct ast_frame *f=NULL;
	int res;
	int x;

	if (p->ministate == STATE_COMMAND) {
		/* Read the first two bytes, first, in case it's a control message */
		fread(result, 1, 2, p->f);
		if (result[0] == CHAR_DLE) {
			return bestdata_handle_escape(p, result[1]);
		} else {
			if (p->ringt) /* if ring timeout specified */
			   {
				x = fileno(p->f);
				res = ast_waitfor_n_fd(&x, 1, &p->ringt, NULL);
				if (res < 0) {
					return NULL;
				}
			   }
			if ((result[0] == '\n') || (result[0] == '\r'))
				return bestdata_handle_escape(p, 0);
			/* Read the rest of the line */
			fgets(result + 2, sizeof(result) - 2, p->f);
			ast_modem_trim(result);
			if (!strcasecmp(result, "OK")) {
				/* If we're in immediate mode, reply now */
				if (p->mode == MODEM_MODE_IMMEDIATE)
					return bestdata_handle_escape(p, '@');
			} else
			if (!strcasecmp(result, "BUSY")) {
				/* Same as a busy signal */
				return bestdata_handle_escape(p, 'b');
			} else
			if (!strcasecmp(result, "RING")) {
				return bestdata_handle_escape(p, 'R');
			} else
			if (!strcasecmp(result, "NO DIALTONE")) {
				/* There's no dialtone, so the line isn't working */
				ast_log(LOG_WARNING, "Device '%s' lacking dialtone\n", p->dev);
				return NULL;
			}
			ast_log(LOG_DEBUG, "Modem said '%s'\n", result);
			return bestdata_handle_escape(p, 0);
		}
	} else {
		  /* if playing, start recording instead */
		if (p->ministate == STATE_VOICEPLAY)
		   {
			if (bestdata_startrec(p)) return NULL;
		   }
		/* We have to be more efficient in voice mode */
		b = (short *)(p->obuf + p->obuflen);
		while (p->obuflen/2 < 240) {
			/* Read ahead the full amount */
			res = fread(result, 1, 240 - p->obuflen/2, p->f);
			if (res < 1) {
				/* If there's nothing there, just continue on */
				if (errno == EAGAIN)
					return bestdata_handle_escape(p, 0);
				ast_log(LOG_WARNING, "Read failed: %s\n", strerror(errno));
			}
			for (x=0;x<res;x++) {
				/* Process all the bytes that we've read */
				if (result[x] == CHAR_DLE) {
					/* We assume there is no more than one signal frame among our
					   data.  */
					if (f) ast_log(LOG_WARNING, "Warning: Dropped a signal frame\n");
					  /* if not a DLE in the data */
					if (result[++x] != CHAR_DLE)
					   {
						/* If bestdata_handle_escape says NULL, say it now, doesn't matter
						   what else is there, the connection is dead. */
						f = bestdata_handle_escape(p, result[x]);
						if (p->dtmfrx) continue;
						return(f);
					   }
				}
				/* Generate a 16-bit signed linear value from our 
				   unsigned 8-bit value */
				*(b++) = (((short)result[x]) - 127) * 0xff;
				p->obuflen += 2;
			}
			if (f) break;
		}
		/* If we have a control frame, return it now */
		if (f) return f;
		/* If we get here, we have a complete voice frame */
		p->fr.frametype = AST_FRAME_VOICE;
		p->fr.subclass = AST_FORMAT_SLINEAR;
		p->fr.samples = 240;
		p->fr.data = p->obuf;
		p->fr.datalen = p->obuflen;
		p->fr.mallocd = 0;
		p->fr.delivery.tv_sec = 0;
		p->fr.delivery.tv_usec = 0;
		p->fr.offset = AST_FRIENDLY_OFFSET;
		p->fr.src = __FUNCTION__;
		if (option_debug)
			ast_log(LOG_DEBUG, "bestdata_read(voice frame)\n");
		p->obuflen = 0;
		return &p->fr;
	}
	return NULL;
}