void uip_tcpfree(struct uip_conn *conn)
{
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
struct uip_readahead_s *readahead;
#endif
uip_lock_t flags;
/* Because g_free_tcp_connections is accessed from user level and interrupt
* level, code, it is necessary to keep interrupts disabled during this
* operation.
*/
DEBUGASSERT(conn->crefs == 0);
flags = uip_lock();
/* UIP_ALLOCATED means that that the connection is not in the active list
* yet.
*/
if (conn->tcpstateflags != UIP_ALLOCATED)
{
/* Remove the connection from the active list */
dq_rem(&conn->node, &g_active_tcp_connections);
}
/* Release any read-ahead buffers attached to the connection */
#if CONFIG_NET_NTCP_READAHEAD_BUFFERS > 0
while ((readahead = (struct uip_readahead_s *)sq_remfirst(&conn->readahead)) != NULL)
{
uip_tcpreadaheadrelease(readahead);
}
#endif
/* Remove any backlog attached to this connection */
#ifdef CONFIG_NET_TCPBACKLOG
if (conn->backlog)
{
uip_backlogdestroy(conn);
}
/* If this connection is, itself, backlogged, then remove it from the
* parent connection's backlog list.
*/
if (conn->blparent)
{
uip_backlogdelete(conn->blparent, conn);
}
#endif
/* Mark the connection available and put it into the free list */
conn->tcpstateflags = UIP_CLOSED;
dq_addlast(&conn->node, &g_free_tcp_connections);
uip_unlock(flags);
}
void uip_tcpfree(struct uip_conn *conn)
{
FAR struct uip_callback_s *cb;
FAR struct uip_callback_s *next;
#ifdef CONFIG_NET_TCP_READAHEAD
FAR struct uip_readahead_s *readahead;
#endif
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
FAR struct uip_wrbuffer_s *wrbuffer;
#endif
uip_lock_t flags;
/* Because g_free_tcp_connections is accessed from user level and interrupt
* level, code, it is necessary to keep interrupts disabled during this
* operation.
*/
DEBUGASSERT(conn->crefs == 0);
flags = uip_lock();
/* Free remaining callbacks, actually there should be only the close callback
* left.
*/
for (cb = conn->list; cb; cb = next)
{
next = cb->flink;
uip_tcpcallbackfree(conn, cb);
}
/* UIP_ALLOCATED means that that the connection is not in the active list
* yet.
*/
if (conn->tcpstateflags != UIP_ALLOCATED)
{
/* Remove the connection from the active list */
dq_rem(&conn->node, &g_active_tcp_connections);
}
#ifdef CONFIG_NET_TCP_READAHEAD
/* Release any read-ahead buffers attached to the connection */
while ((readahead = (struct uip_readahead_s *)sq_remfirst(&conn->readahead)) != NULL)
{
uip_tcpreadahead_release(readahead);
}
#endif
#ifdef CONFIG_NET_TCP_WRITE_BUFFERS
/* Release any write buffers attached to the connection */
while ((wrbuffer = (struct uip_wrbuffer_s *)sq_remfirst(&conn->write_q)) != NULL)
{
uip_tcpwrbuffer_release(wrbuffer);
}
while ((wrbuffer = (struct uip_wrbuffer_s *)sq_remfirst(&conn->unacked_q)) != NULL)
{
uip_tcpwrbuffer_release(wrbuffer);
}
#endif
#ifdef CONFIG_NET_TCPBACKLOG
/* Remove any backlog attached to this connection */
if (conn->backlog)
{
uip_backlogdestroy(conn);
}
/* If this connection is, itself, backlogged, then remove it from the
* parent connection's backlog list.
*/
if (conn->blparent)
{
uip_backlogdelete(conn->blparent, conn);
}
#endif
/* Mark the connection available and put it into the free list */
conn->tcpstateflags = UIP_CLOSED;
dq_addlast(&conn->node, &g_free_tcp_connections);
uip_unlock(flags);
}
int uip_backlogcreate(FAR struct uip_conn *conn, int nblg)
{
FAR struct uip_backlog_s *bls = NULL;
FAR struct uip_blcontainer_s *blc;
uip_lock_t flags;
int size;
int offset;
int i;
nllvdbg("conn=%p nblg=%d\n", conn, nblg);
#ifdef CONFIG_DEBUG
if (!conn)
{
return -EINVAL;
}
#endif
/* Then allocate the backlog as requested */
if (nblg > 0)
{
/* Align the list of backlog structures to 32-bit boundaries. This
* may be excessive on 24-16-bit address machines; and insufficient
* on 64-bit address machines -- REVISIT
*/
offset = (sizeof(struct uip_backlog_s) + 3) & ~3;
/* Then determine the full size of the allocation include the
* uip_backlog_s, a pre-allocated array of struct uip_blcontainer_s
* and alignement padding
*/
size = offset + nblg * sizeof(struct uip_blcontainer_s);
/* Then allocate that much */
bls = (FAR struct uip_backlog_s *)kzalloc(size);
if (!bls)
{
nlldbg("Failed to allocate backlog\n");
return -ENOMEM;
}
/* Then add all of the pre-allocated containers to the free list */
blc = (FAR struct uip_blcontainer_s*)(((FAR uint8_t*)bls) + offset);
for (i = 0; i < nblg; i++)
{
sq_addfirst(&blc->bc_node, &bls->bl_free);
}
}
/* Destroy any existing backlog (shouldn't be any) */
flags = uip_lock();
uip_backlogdestroy(conn);
/* Now install the backlog tear-off in the connection. NOTE that bls may
* actually be NULL if nblg is <= 0; In that case, we are disabling backlog
* support. Since interrupts are disabled, destroying the old backlog and
* replace it with the new is an atomic operation
*/
conn->backlog = bls;
uip_unlock(flags);
return OK;
}
