/* Initialize module */
void __attribute__ ((constructor)) _init(void)
{
int opt = 1;
struct sockaddr_in sin;
orig_sendto = preload("sendto");
orig_recvfrom = preload("recvfrom");
orig_setsockopt = preload("setsockopt");
orig_bind = preload("bind");
ctrl_socket = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (ctrl_socket < 0) {
printf ("Ajil lib failed to create control socket\n");
exit (-1);
}
orig_setsockopt (ctrl_socket, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
memset (&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = inet_addr(DADDRESS);
sin.sin_port = htons(DPORT);
if (connect (ctrl_socket, (struct sockaddr *) &sin, sizeof(struct sockaddr_in)) < 0) {
printf ("Could not connect to Ajil daemon\n");
exit (-1);
} else {
printf ("Connected to Ajil daemon\n");
usleep (500);
if (recv (ctrl_socket, (void *) &data_port, sizeof(uint16_t), 0) < 0) {
printf ("Error receiving port number from daemon\n");
exit (-1);
}
}
}
INTERPOSE (setsockopt, int, int sockfd, int level, int optname,
const void *optval, socklen_t optlen)
{
CHECK_INTERPOSE (setsockopt);
if (!is_our_fd (sockfd))
return orig_setsockopt (sockfd, level, optname, optval, optlen);
if ((level == SOL_SOCKET) && (optname == SO_KEEPALIVE))
{
/* Can be safely ignored */
return 0;
}
if ((level == SOL_SOCKET) && (optname == SO_REUSEADDR))
{
//FIXME
return 0;
}
if ((level == SOL_SOCKET) && (optname == SO_LINGER))
{
//FIXME
return 0;
}
if ((level == IPPROTO_IP) && (optname == IP_PKTINFO))
{
//FIXME
return 0;
}
if ((level == IPPROTO_IP) && (optname == IP_TOS))
{
/* Can be safely ignored */
return 0;
}
if ((level == IPPROTO_IP) && (optname == IP_TTL))
{
/* Can be safely ignored */
return 0;
}
if ((level == IPPROTO_TCP) && (optname == TCP_NODELAY))
{
//FIXME
return 0;
}
DEBUG_PRINTF ("unknown setsockopt %d %d %d %p %d\n",
sockfd, level, optname, optval, optlen);
errno = ENOPROTOOPT;
return -1;
}
/* Overload setsockopt */
int setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen)
{
printf("Called setsockopt\n");
return orig_setsockopt(s, level, optname, optval, optlen);
}