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/**
* @file cons.c Socket-based command-line console
*
* Copyright (C) 2010 Creytiv.com
*/
#include <re.h>
#include <baresip.h>
/**
* @defgroup cons cons
*
* Console User-Interface (UI) using UDP/TCP sockets
*
*
* This module implements a simple console for connecting to Baresip via
* UDP or TCP-based sockets. You can use programs like telnet or netcat to
* connect to the command-line interface.
*
* Example, with the cons-module listening on default port 5555:
*
\verbatim
$ netcat -u 127.0.0.1 5555
\endverbatim
*
* The following options can be configured:
*
\verbatim
cons_listen 0.0.0.0:5555 # IP-address and port to listen on
\endverbatim
*/
enum {CONS_PORT = 5555};
struct ui_st {
struct udp_sock *us;
struct tcp_sock *ts;
struct tcp_conn *tc;
};
static struct ui_st *cons = NULL; /* allow only one instance */
static int print_handler(const char *p, size_t size, void *arg)
{
return mbuf_write_mem(arg, (uint8_t *)p, size);
}
static void udp_recv(const struct sa *src, struct mbuf *mb, void *arg)
{
struct ui_st *st = arg;
struct mbuf *mbr = mbuf_alloc(64);
struct re_printf pf;
pf.vph = print_handler;
pf.arg = mbr;
while (mbuf_get_left(mb)) {
char ch = mbuf_read_u8(mb);
if (ch == '\r')
ch = '\n';
ui_input_key(ch, &pf);
}
mbr->pos = 0;
(void)udp_send(st->us, src, mbr);
mem_deref(mbr);
}
static void cons_destructor(void *arg)
{
struct ui_st *st = arg;
mem_deref(st->us);
mem_deref(st->tc);
mem_deref(st->ts);
}
static int tcp_write_handler(const char *p, size_t size, void *arg)
{
struct mbuf mb;
mb.buf = (uint8_t *)p;
mb.pos = 0;
mb.end = mb.size = size;
return tcp_send(arg, &mb);
}
static void tcp_recv_handler(struct mbuf *mb, void *arg)
{
struct ui_st *st = arg;
struct re_printf pf;
pf.vph = tcp_write_handler;
pf.arg = st->tc;
while (mbuf_get_left(mb) > 0) {
char ch = mbuf_read_u8(mb);
if (ch == '\r')
ch = '\n';
ui_input_key(ch, &pf);
}
}
static void tcp_close_handler(int err, void *arg)
{
struct ui_st *st = arg;
(void)err;
st->tc = mem_deref(st->tc);
}
static void tcp_conn_handler(const struct sa *peer, void *arg)
{
struct ui_st *st = arg;
(void)peer;
/* only one connection allowed */
st->tc = mem_deref(st->tc);
(void)tcp_accept(&st->tc, st->ts, NULL, tcp_recv_handler,
tcp_close_handler, st);
}
static int cons_alloc(struct ui_st **stp, const struct sa *laddr)
{
struct ui_st *st;
int err;
if (!stp)
return EINVAL;
st = mem_zalloc(sizeof(*st), cons_destructor);
if (!st)
return ENOMEM;
err = udp_listen(&st->us, laddr, udp_recv, st);
if (err) {
warning("cons: failed to listen on UDP %J (%m)\n",
laddr, err);
goto out;
}
err = tcp_listen(&st->ts, laddr, tcp_conn_handler, st);
if (err) {
warning("cons: failed to listen on TCP %J (%m)\n",
laddr, err);
goto out;
}
debug("cons: UI console listening on %J\n", laddr);
out:
if (err)
mem_deref(st);
else
*stp = st;
return err;
}
static struct ui ui_cons = {
.name = "cons",
};
static int cons_init(void)
{
struct sa laddr;
int err;
if (conf_get_sa(conf_cur(), "cons_listen", &laddr)) {
sa_set_str(&laddr, "0.0.0.0", CONS_PORT);
}
err = cons_alloc(&cons, &laddr);
if (err)
return err;
ui_register(&ui_cons);
return 0;
}
static int cons_close(void)
{
ui_unregister(&ui_cons);
cons = mem_deref(cons);
return 0;
}
const struct mod_export DECL_EXPORTS(cons) = {
"cons",
"ui",
cons_init,
cons_close
};
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