static int
multi_tcp_post(struct multi_context *m, struct multi_instance *mi, const int action)
{
struct context *c = multi_tcp_context(m, mi);
int newaction = TA_UNDEF;
#define MTP_NONE 0
#define MTP_TUN_OUT (1<<0)
#define MTP_LINK_OUT (1<<1)
unsigned int flags = MTP_NONE;
if (TUN_OUT(c))
{
flags |= MTP_TUN_OUT;
}
if (LINK_OUT(c))
{
flags |= MTP_LINK_OUT;
}
switch (flags)
{
case MTP_TUN_OUT|MTP_LINK_OUT:
case MTP_TUN_OUT:
newaction = TA_TUN_WRITE;
break;
case MTP_LINK_OUT:
newaction = TA_SOCKET_WRITE;
break;
case MTP_NONE:
if (mi && socket_read_residual(c->c2.link_socket))
{
newaction = TA_SOCKET_READ_RESIDUAL;
}
else
{
multi_tcp_set_global_rw_flags(m, mi);
}
break;
default:
{
struct gc_arena gc = gc_new();
msg(M_FATAL, "MULTI TCP: multi_tcp_post bad state, mi=%s flags=%d",
multi_instance_string(mi, false, &gc),
flags);
gc_free(&gc);
break;
}
}
dmsg(D_MULTI_DEBUG, "MULTI TCP: multi_tcp_post %s -> %s",
pract(action),
pract(newaction));
return newaction;
}
/*
* Return the io_wait() flags appropriate for
* a point-to-multipoint tunnel.
*/
static inline unsigned int
p2mp_iow_flags (const struct multi_context *m)
{
unsigned int flags = IOW_WAIT_SIGNAL;
if (m->pending)
{
if (TUN_OUT (&m->pending->context))
flags |= IOW_TO_TUN;
if (LINK_OUT (&m->pending->context))
flags |= IOW_TO_LINK;
}
else if (mbuf_defined (m->mbuf))
flags |= IOW_MBUF;
else
flags |= IOW_READ;
return flags;
}
