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net/udp: add support for CONFIG_NET_ALLOC_CONNS 

Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an 2021-12-31 15:20:29 +08:00 committed by Xiang Xiao
parent 38b7b3d26a
commit 26370cd2f7
1 changed files with 52 additions and 5 deletions
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57
net/udp/udp_conn.c
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@ -80,7 +80,9 @@
/* The array containing all UDP connections. */
#ifndef CONFIG_NET_ALLOC_CONNS
struct udp_conn_s g_udp_connections[CONFIG_NET_UDP_CONNS];
#endif
/* A list of all free UDP connections */
@ -125,15 +127,12 @@ static FAR struct udp_conn_s *udp_find_conn(uint8_t domain,
FAR union ip_binding_u *ipaddr,
uint16_t portno)
{
FAR struct udp_conn_s *conn;
int i;
FAR struct udp_conn_s *conn = NULL;
/* Now search each connection structure. */
for (i = 0; i < CONFIG_NET_UDP_CONNS; i++)
while ((conn = udp_nextconn(conn)) != NULL)
{
conn = &g_udp_connections[i];
/* If the port local port number assigned to the connections matches
* AND the IP address of the connection matches, then return a
* reference to the connection structure. INADDR_ANY is a special
@ -453,6 +452,46 @@ static inline FAR struct udp_conn_s *
}
#endif /* CONFIG_NET_IPv6 */
/****************************************************************************
* Name: udp_alloc_conn
*
* Description:
* Allocate a uninitialized UDP connection structure.
*
****************************************************************************/
#ifdef CONFIG_NET_ALLOC_CONNS
FAR struct udp_conn_s *udp_alloc_conn(void)
{
FAR struct udp_conn_s *conn;
int i;
/* Return the entry from the head of the free list */
if (dq_peek(&g_free_udp_connections) == NULL)
{
conn = kmm_zalloc(sizeof(struct udp_conn_s) *
CONFIG_NET_UDP_CONNS);
if (conn == NULL)
{
return conn;
}
/* Now initialize each connection structure */
for (i = 0; i < CONFIG_NET_UDP_CONNS; i++)
{
/* Mark the connection closed and move it to the free list */
conn[i].lport = 0;
dq_addlast(&conn[i].node, &g_free_udp_connections);
}
}
return (FAR struct udp_conn_s *)dq_remfirst(&g_free_udp_connections);
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
@ -538,7 +577,9 @@ uint16_t udp_select_port(uint8_t domain, FAR union ip_binding_u *u)
void udp_initialize(void)
{
#ifndef CONFIG_NET_ALLOC_CONNS
int i;
#endif
/* Initialize the queues */
@ -546,6 +587,7 @@ void udp_initialize(void)
dq_init(&g_active_udp_connections);
nxsem_init(&g_free_sem, 0, 1);
#ifndef CONFIG_NET_ALLOC_CONNS
for (i = 0; i < CONFIG_NET_UDP_CONNS; i++)
{
/* Mark the connection closed and move it to the free list */
@ -553,6 +595,7 @@ void udp_initialize(void)
g_udp_connections[i].lport = 0;
dq_addlast(&g_udp_connections[i].node, &g_free_udp_connections);
}
#endif
}
/****************************************************************************
@ -571,7 +614,11 @@ FAR struct udp_conn_s *udp_alloc(uint8_t domain)
/* The free list is protected by a semaphore (that behaves like a mutex). */
_udp_semtake(&g_free_sem);
#ifndef CONFIG_NET_ALLOC_CONNS
conn = (FAR struct udp_conn_s *)dq_remfirst(&g_free_udp_connections);
#else
conn = udp_alloc_conn();
#endif
if (conn)
{
/* Make sure that the connection is marked as uninitialized */