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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include "list.h"
#include "input.h"
#include "tcp.h"
struct connection {
int socket;
struct sockaddr_storage peer;
struct list_head list;
char peerhost[INET6_ADDRSTRLEN+1];
char peerserv[33];
};
/* ------------------------------------------------------------------ */
int debug = 0;
int timeout = 10;
int slisten;
int input;
LIST_HEAD(connections);
static void conn_new(void)
{
struct connection *conn;
unsigned int len;
conn = malloc(sizeof(*conn));
memset(conn,0,sizeof(*conn));
len = sizeof(conn->peer);
conn->socket = accept(slisten,(struct sockaddr*)&conn->peer,&len);
if (-1 == conn->socket) {
if (tcp_verbose)
perror("accept");
free(conn);
return;
}
if (tcp_verbose) {
getnameinfo((struct sockaddr*)&conn->peer,len,
conn->peerhost,INET6_ADDRSTRLEN,
conn->peerserv,32,
NI_NUMERICHOST | NI_NUMERICSERV);
fprintf(stderr,"connect from [%s]\n",conn->peerhost);
}
fcntl(conn->socket,F_SETFL,O_NONBLOCK);
/* FIXME: access control */
list_add_tail(&conn->list,&connections);
}
static void conn_del(struct connection *conn)
{
if (tcp_verbose)
fprintf(stderr,"connection from [%s] closed\n",conn->peerhost);
close(conn->socket);
list_del(&conn->list);
free(conn);
}
static void input_bcast(struct input_event *ev)
{
struct connection *conn;
struct list_head *item;
struct list_head *safe;
int rc;
if (debug)
print_event(ev);
/* convert to network byte order ... */
ev->time.tv_sec = htonl(ev->time.tv_sec);
ev->time.tv_usec = htonl(ev->time.tv_usec);
ev->type = htons(ev->type);
ev->code = htons(ev->code);
ev->value = htonl(ev->value);
/* send out */
list_for_each_safe(item,safe,&connections) {
conn = list_entry(item, struct connection, list);
rc = write(conn->socket,ev,sizeof(*ev));
if (rc != sizeof(*ev))
conn_del(conn);
}
}
static void loop(void)
{
struct connection *conn;
struct list_head *item;
struct list_head *safe;
fd_set set;
struct timeval tv;
int max,rc;
for (;;) {
tv.tv_sec = timeout;
tv.tv_usec = 0;
FD_ZERO(&set);
FD_SET(slisten,&set);
max = slisten;
FD_SET(input,&set);
if (max < input)
max = input;
list_for_each(item,&connections) {
conn = list_entry(item, struct connection, list);
FD_SET(conn->socket,&set);
if (max < conn->socket)
max = conn->socket;
}
rc = select(max+1,&set,NULL,NULL,&tv);
if (rc < 0) {
/* Huh? */
perror("select");
exit(1);
}
if (0 == rc) {
/* timeout */
continue;
}
list_for_each_safe(item,safe,&connections) {
conn = list_entry(item, struct connection, list);
if (FD_ISSET(conn->socket,&set)) {
char dummy[16];
rc = read(conn->socket,dummy,sizeof(dummy));
if (rc <= 0)
conn_del(conn);
}
}
if (FD_ISSET(input,&set)) {
struct input_event ev;
rc = read(input,&ev,sizeof(ev));
if (rc != sizeof(ev))
exit(1);
input_bcast(&ev);
}
if (FD_ISSET(slisten,&set))
conn_new();
}
}
/* ------------------------------------------------------------------ */
static void daemonize(void)
{
switch (fork()) {
case -1:
perror("fork");
exit(1);
case 0:
close(0); close(1); close(2);
setsid();
open("/dev/null",O_RDWR); dup(0); dup(0);
break;
default:
exit(0);
}
}
static int usage(char *prog, int error)
{
fprintf(error ? stderr : stdout,
"usage: %s"
" [ -t <sec> ] [ -g ]"
" devnr\n",
prog);
exit(error);
}
int main(int argc, char *argv[])
{
char *addr = NULL;
char *port = "1234";
int c,devnr;
struct addrinfo ask;
memset(&ask,0,sizeof(ask));
ask.ai_family = PF_UNSPEC;
ask.ai_socktype = SOCK_STREAM;
for (;;) {
if (-1 == (c = getopt(argc, argv, "hdt:")))
break;
switch (c) {
case 'd':
debug = 1;
tcp_verbose = 1;
break;
case 't':
timeout = atoi(optarg);
break;
case 'h':
usage(argv[0],0);
default:
usage(argv[0],1);
}
}
if (optind == argc)
usage(argv[0],1);
devnr = atoi(argv[optind]);
input = device_open(devnr,debug);
if (-1 == input)
exit(1);
slisten = tcp_listen(&ask,addr,port);
if (-1 == slisten)
exit(1);
if (!debug)
daemonize();
loop();
return 0;
}
/* ---------------------------------------------------------------------
* Local variables:
* c-basic-offset: 8
* End:
*/
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