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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <termios.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <syslog.h>
#include "util.h"
#include "sia.h"
extern int new_block (int fd, SIA_Block *b, int log, const char *email, const char *state_file, const char *mqtt_host);
extern void periodic_task (void);
extern void dump_state (const char *);
static int usage (const char *name)
{
fprintf (stderr, "Usage:\n");
fprintf (stderr, "%s [ -l ] [ -p listen_port ] [ -e email address] [ -s state_file ] [ -m mqtt_host ]\n\n", name);
fprintf (stderr, "listen_port defaults to 10002\n");
return 1;
}
#define TICK 5
int main (int argc, char *argv[])
{
int port = 10002;
unsigned opt;
int fd;
int afd = -1;
SIA_Block b;
struct timeval tv = {0};
int log = 0;
unsigned char buf[SIA_MAX_BLOCK_LENGTH];
unsigned ptr = 0;
const char *email = NULL;
const char *state_file = NULL;
const char *mqtt_host = NULL;
while ((opt = getopt (argc, argv, "p:le:s:m:")) != -1) {
switch (opt) {
case 'p':
port = atoi (optarg);
break;
case 'l':
log++;
break;
case 'e':
email = optarg;
break;
case 's':
state_file = optarg;
break;
case 'm':
mqtt_host = optarg;
break;
default: /* '?' */
return usage (argv[0]);
}
}
if (log)
openlog ("net_rx", 0, LOG_USER);
fd = open_tcp_server (port);
if (fd < 0) {
perror ("open socket");
return -1;
}
set_blocking (fd);
if (state_file)
dump_state (state_file);
// Epically budget TCP server
tv.tv_sec = TICK;
for (;;) {
fd_set rfds;
int rc;
FD_ZERO (&rfds);
FD_SET (fd, &rfds);
if (afd > 0)
FD_SET (afd, &rfds);
rc = select (afd > fd ? afd + 1 : fd + 1, &rfds, NULL, NULL, &tv);
if (!rc) periodic_task();
if (!tv.tv_sec && !tv.tv_usec)
tv.tv_sec = TICK;
if (FD_ISSET (fd, &rfds)) {
if (afd > 0) close (afd);
afd = accept (fd, NULL, NULL);
ptr = 0;
}
if ((afd > 0) && (FD_ISSET (afd, &rfds))) {
if (read (afd, &buf[ptr], 1) != 1) {
close (afd);
afd = -1;
ptr = 0;
continue;
}
ptr++;
switch (sia_parse (buf, ptr, &b)) {
case -1: /*Parse errror, form here is top drop connexion*/
close (afd);
afd = -1;
break;
case 0: /*More data needed*/
break;
default: /*Valid block */
new_block (afd, &b, log, email, state_file, mqtt_host);
ptr = 0;
break;
}
if (ptr == SIA_MAX_BLOCK_LENGTH) {
close (afd);
afd = -1;
}
}
}
}
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