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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <termios.h>
#include "util.h"
#include "sia.h"
void msg (char *account, char *event, char *ascii)
{
printf ("%s %64s %s\n", account, event, ascii);
}
static int new_block (int fd, SIA_Block *b)
{
static int have_ascii_messages = 0; /*SIA level 3 doesn't have ascii, SIA level 4 does */
static char account[SIA_MAX_DATA_LENGTH + 1];
static char event[SIA_MAX_DATA_LENGTH + 1];
static char ascii[SIA_MAX_DATA_LENGTH + 1];
unsigned len = sia_data_length (b);
if (sia_ack_if_needed (fd, b))
return -1;
switch (b->function) {
case SIA_FN_ACCOUNT_ID:
memcpy (account, b->data, len);
account[len] = 0;
break;
case SIA_FN_NEW_EVENT:
case SIA_FN_OLD_EVENT:
memcpy (event, b->data, len);
event[len] = 0;
if (!have_ascii_messages) msg (account, event, "");
break;
case SIA_FN_ASCII:
have_ascii_messages = 1;
memcpy (ascii, b->data, len);
ascii[len] = 0;
msg (account, event, ascii);
break;
}
return 0;
}
static int usage (const char *name)
{
fprintf (stderr, "Usage:\n");
fprintf (stderr, "%s [ -b baud ] -p serial_device\n\n", name);
fprintf (stderr, "baud defaults to 9600\n");
return 1;
}
int main (int argc, char *argv[])
{
const char *port;
int baud = 9600;
unsigned opt;
int fd;
SIA_Block b;
ssize_t red;
unsigned char buf[SIA_MAX_BLOCK_LENGTH];
unsigned ptr = 0;
while ((opt = getopt (argc, argv, "p:b:")) != -1) {
switch (opt) {
case 'p':
port = optarg;
break;
case 'b':
baud = atoi (optarg);
break;
default: /* '?' */
return usage (argv[0]);
}
}
if (!port)
return usage (argv[0]);
fd = open_tty (port, baud);
set_blocking (fd);
for (;;) {
red = read (fd, &buf[ptr], 1);
if ((red < 0) || (red > 1)) {
perror ("read");
return 1;
}
if (!red) continue;
ptr++;
switch (sia_parse (buf, ptr, &b)) {
case -1: /*Parse errror, flush and carry on */
tcflush (fd, TCIFLUSH);
ptr = 0;
break;
case 0: /*More data needed*/
break;
default: /*Valid block */
new_block (fd, &b);
ptr = 0;
break;
}
if (ptr == SIA_MAX_BLOCK_LENGTH) {
tcflush (fd, TCIFLUSH);
ptr = 0;
}
}
}
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