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/*
* BIRD Internet Routing Daemon -- Command-Line Interface
*
* (c) 1999 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include "nest/bird.h"
#include "nest/cli.h"
#include "conf/conf.h"
#include "lib/string.h"
pool *cli_pool;
void
cli_printf(cli *c, int code, char *msg, ...)
{
va_list args;
byte buf[1024];
int cd = code;
int size, cnt;
struct cli_out *o;
va_start(args, msg);
if (cd < 0)
{
cd = -cd;
if (cd == c->last_reply)
size = bsprintf(buf, " ");
else
size = bsprintf(buf, "%04d-", cd);
}
else
size = bsprintf(buf, "%04d ", cd);
c->last_reply = cd;
cnt = bvsnprintf(buf+size, sizeof(buf)-size-1, msg, args);
if (cnt < 0)
{
cli_printf(c, code < 0 ? -8000 : 8000, "<line overflow>");
return;
}
size += cnt;
buf[size++] = '\n';
if (!(o = c->tx_write) || o->wpos + size > o->end)
{
if (!o && c->tx_buf)
o = c->tx_buf;
else
{
o = mb_alloc(c->pool, sizeof(struct cli_out) + CLI_TX_BUF_SIZE);
if (c->tx_write)
c->tx_write->next = o;
else
c->tx_buf = o;
o->next = NULL;
o->wpos = o->outpos = o->buf;
o->end = o->buf + CLI_TX_BUF_SIZE;
}
c->tx_write = o;
if (!c->tx_pos)
c->tx_pos = o;
}
memcpy(o->wpos, buf, size);
o->wpos += size;
}
static void
cli_hello(cli *c)
{
cli_printf(c, 1, "BIRD " BIRD_VERSION " ready.");
c->cont = NULL;
}
static void
cli_free_out(cli *c)
{
struct cli_out *o, *p;
if (o = c->tx_buf)
{
c->tx_write = NULL;
o->wpos = o->outpos = o->buf;
while (p = o->next)
{
o->next = p->next;
mb_free(p);
}
}
}
static byte *cli_rh_pos;
static unsigned int cli_rh_len;
static int cli_rh_trick_flag;
struct cli *this_cli;
static int
cli_cmd_read_hook(byte *buf, unsigned int max)
{
if (!cli_rh_trick_flag)
{
cli_rh_trick_flag = 1;
buf[0] = '!';
return 1;
}
if (max > cli_rh_len)
max = cli_rh_len;
memcpy(buf, cli_rh_pos, max);
cli_rh_pos += max;
cli_rh_len -= max;
return max;
}
static void
cli_command(struct cli *c)
{
struct config f;
int res;
f.pool = NULL;
f.mem = c->parser_pool;
cf_read_hook = cli_cmd_read_hook;
cli_rh_pos = c->rx_buf;
cli_rh_len = strlen(c->rx_buf);
cli_rh_trick_flag = 0;
this_cli = c;
res = cli_parse(&f);
lp_flush(c->parser_pool);
if (!res)
cli_printf(c, 9001, f.err_msg);
}
static int
cli_event(void *data)
{
cli *c = data;
int err;
if (c->tx_pos)
;
else if (c->cont)
c->cont(c);
else
{
err = cli_get_command(c);
if (!err)
return 0;
if (err < 0)
cli_printf(c, 9000, "Command too long");
else
cli_command(c);
}
if (cli_write(c))
{
cli_free_out(c);
return 1;
}
return 0;
}
cli *
cli_new(void *priv)
{
pool *p = rp_new(cli_pool, "CLI");
cli *c = mb_alloc(p, sizeof(cli));
c->pool = p;
c->priv = priv;
c->event = ev_new(p);
c->event->hook = cli_event;
c->event->data = c;
c->tx_buf = c->tx_pos = c->tx_write = NULL;
c->cont = cli_hello;
c->last_reply = 0;
c->parser_pool = lp_new(c->pool, 4096);
ev_schedule(c->event);
return c;
}
void
cli_kick(cli *c)
{
if (!c->cont && !c->tx_pos)
ev_schedule(c->event);
}
void
cli_written(cli *c)
{
cli_free_out(c);
ev_schedule(c->event);
}
void
cli_free(cli *c)
{
rfree(c->pool);
}
void
cli_init(void)
{
cli_pool = rp_new(&root_pool, "CLI");
}
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