/*
* Allocate a Telnet control block.
*/
static telnet_t *
telnet_alloc(void)
{
int i;
telnet_t *tp;
tp = xalloc(sizeof (telnet_t));
tp->t_flags = 0;
tp->t_state = TS_DATA;
tp->t_nd = NULL;
tp->t_rawq = nq_alloc(TELNET_RAWQ_SIZE);
tp->t_canq = nq_alloc(TELNET_CANQ_SIZE);
tp->t_optq = NULL;
tp->t_outq = nq_alloc(TELNET_OUTQ_SIZE);
tp->t_ip = NULL;
tp->t_rblen = 0;
tp->t_sblen = 0;
tp->task = NULL;
for (i = 0; i < OP_SIZE; i++)
{
tp->t_optb[i].o_us = OS_NO;
tp->t_optb[i].o_usq = OQ_EMPTY;
tp->t_optb[i].o_him = OS_NO;
tp->t_optb[i].o_himq = OQ_EMPTY;
}
return tp;
}
/*
* Process a Subnegotiate Begin.
*/
static void
telnet_sb(telnet_t *tp, u_char opt)
{
if (tp->t_optq == NULL)
tp->t_optq = nq_alloc(TELNET_OPTQ_SIZE);
tp->t_opt = opt;
}
/*
* Initialize the UDP Manager.
*/
udpsvc_t *
udpsvc_init(int port)
{
int s;
struct sockaddr_in addr;
struct udpsvc_t *svc;
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (s == -1)
fatal("udp_init: socket() error = %d.\n", errno);
enable_reuseaddr(s);
memset(&addr, 0, sizeof (addr));
addr.sin_family = AF_INET;
addr.sin_port = htons((u_short)port);
addr.sin_addr.s_addr = INADDR_ANY;
if (bind(s, (struct sockaddr *)&addr, sizeof (addr)) == -1)
{
if (errno == EADDRINUSE)
{
(void)fprintf(stderr, "UDP Socket already bound!\n");
debug_message("UDP Socket already bound!\n");
(void)close(s);
return 0;
}
else
{
fatal("udp_init: bind() error = %d.\n", errno);
}
}
enable_nbio(s);
svc = xalloc(sizeof(*udpsvc));
svc->nq = nq_alloc(UDPSVC_RAWQ_SIZE);
svc->nd = nd_attach(s, udpsvc_read, NULL, NULL, NULL, udpsvc_shutdown,
svc);
nd_enable(svc->nd, ND_R);
return svc;
}
