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/* ISC license. */
#include <errno.h>
#include <sys/uio.h>
#include <skalibs/uint32.h>
#include <skalibs/textmessage.h>
#include <skalibs/posixishard.h>
#include "client.h"
#include "command.h"
static inline int answer (client_t *c, char e)
{
return textmessage_put(&c->connection.out, &e, 1) ;
}
static int do_query (client_t *c, char const *s, size_t len)
{
if (!len--) return (errno = EPROTO, 0) ;
if (!(c->flags & 2)) return answer(c, EPERM) ;
/* TODO */
return 1 ;
}
static inline int do_monitor_stop (client_t *c)
{
monitor_finish(c) ;
return answer(0) ;
}
static inline int do_monitor_start (client_t *c, uint32_t v)
{
if (textmessage_sender_fd(&c->monitor) >= 0) return answer(c, EBUSY) ;
if (!answer(c, 0)) return 0 ;
/*
XXX: due to the nature of ancil, we have to do a couple sync
writes here, which may mess up our async engine. But in practice,
with such small data, kernel buffers make it so writes/sendmsgs
are always instantly accepted, so we get away with it.
*/
tain_t deadline ;
tain_addsec_g(&deadline, 2) ;
if (!textmessage_sender_timed_flush_g(&c->connection.out, &deadline)
|| !textmessage_create_send_channel_g(textmessage_sender_fd(&c->connection.out), &c->monitor, S6RC_MONITOR_BANNER, S6RC_MONITOR_BANNERLEN, &deadline))
return 0 ;
c->monitor_verbosity = v ;
client_monitors++ ;
return 1 ;
}
static int do_monitor (client_t *c, char const *s, size_t len)
{
if (!len--) return (errno = EPROTO, 0) ;
if (!(c->flags & 2)) return answer(c, EPERM) ;
switch (*s++)
{
case '+' :
{
uint32_t v ;
if (len != 4) return (errno = EPROTO, 0) ;
uint32_unpack_big(s, &v) ;
return do_monitor_start(c, v) ;
}
case '-' :
if (len) return (errno = EPROTO, 0) ;
return do_monitor_stop(c, s, len) ;
default : return (errno = EPROTO, 0) ;
}
}
static int do_change (client_t *c, char const *s, size_t len)
{
if (!len--) return (errno = EPROTO, 0) ;
if (!(c->flags & 4)) return answer(c, EPERM) ;
/* TODO */
return 1 ;
}
static int do_event (client_t *c, char const *s, size_t len)
{
if (!len--) return (errno = EPROTO, 0) ;
if (!(c->flags & 8)) return answer(c, EPERM) ;
/* TODO */
return 1 ;
}
static int do_admin (client_t *c, char const *s, size_t len)
{
if (!len--) return (errno = EPROTO, 0) ;
if (!(c->flags & 16)) return answer(c, EPERM) ;
/* TODO */
return 1 ;
}
int command_handle (struct iovec const *v, void *aux)
{
client_t *c = aux ;
char const *s = v->iov_base ;
size_t len = v->iov_len ;
if (!len--) return (errno = EPROTO, 0) ;
switch (*s++)
{
case 'Q' : return do_query(c, s, len) ;
case 'M' : return do_monitor(c, s, len) ;
case '?' : return do_change(c, s, len) ;
case '!' : return do_event(c, s, len) ;
case '#' : return do_admin(c, s, len) ;
default : return (errno = EPROTO, 0) ;
}
}
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