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net/tcp: support bind the same port with different domain 

Reference here:
https://man7.org/linux/man-pages/man7/ipv6.7.html

IPV6_V6ONLY slice

Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an 2021-03-31 18:11:19 +08:00 committed by Anthony Merlino
parent 2d0e690803
commit 621242e890
1 changed files with 51 additions and 112 deletions
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163
net/tcp/tcp_conn.c
View File

@ -94,108 +94,6 @@ static dq_queue_t g_active_tcp_connections;
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: tcp_ipv4_listener
*
* Description:
* Given a local port number (in network byte order), find the TCP
* connection that listens on this port.
*
* Primary uses: (1) to determine if a port number is available, (2) to
* To identify the socket that will accept new connections on a local port.
*
****************************************************************************/
#ifdef CONFIG_NET_IPv4
static inline FAR struct tcp_conn_s *tcp_ipv4_listener(in_addr_t ipaddr,
uint16_t portno)
{
FAR struct tcp_conn_s *conn;
int i;
/* Check if this port number is in use by any active UIP TCP connection */
for (i = 0; i < CONFIG_NET_TCP_CONNS; i++)
{
conn = &g_tcp_connections[i];
/* Check if this connection is open and the local port assignment
* matches the requested port number.
*/
if (conn->tcpstateflags != TCP_CLOSED && conn->lport == portno)
{
/* If there are multiple interface devices, then the local IP
* address of the connection must also match. INADDR_ANY is a
* special case: There can only be instance of a port number
* with INADDR_ANY.
*/
if (net_ipv4addr_cmp(conn->u.ipv4.laddr, ipaddr) ||
net_ipv4addr_cmp(conn->u.ipv4.laddr, INADDR_ANY))
{
/* The port number is in use, return the connection */
return conn;
}
}
}
return NULL;
}
#endif /* CONFIG_NET_IPv4 */
/****************************************************************************
* Name: tcp_ipv6_listener
*
* Description:
* Given a local port number (in network byte order), find the TCP
* connection that listens on this port.
*
* Primary uses: (1) to determine if a port number is available, (2) to
* To identify the socket that will accept new connections on a local port.
*
****************************************************************************/
#ifdef CONFIG_NET_IPv6
static inline FAR struct tcp_conn_s *
tcp_ipv6_listener(const net_ipv6addr_t ipaddr, uint16_t portno)
{
FAR struct tcp_conn_s *conn;
int i;
/* Check if this port number is in use by any active UIP TCP connection */
for (i = 0; i < CONFIG_NET_TCP_CONNS; i++)
{
conn = &g_tcp_connections[i];
/* Check if this connection is open and the local port assignment
* matches the requested port number.
*/
if (conn->tcpstateflags != TCP_CLOSED && conn->lport == portno)
{
/* If there are multiple interface devices, then the local IP
* address of the connection must also match. The IPv6
* unspecified address is a special case: There can only be
* one instance of a port number with the unspecified address.
*/
if (net_ipv6addr_cmp(conn->u.ipv6.laddr, ipaddr) ||
net_ipv6addr_cmp(conn->u.ipv6.laddr, g_ipv6_unspecaddr))
{
/* The port number is in use, return the connection */
return conn;
}
}
}
return NULL;
}
#endif /* CONFIG_NET_IPv6 */
/****************************************************************************
* Name: tcp_listener
*
@ -212,23 +110,64 @@ static FAR struct tcp_conn_s *
tcp_listener(uint8_t domain, FAR const union ip_addr_u *ipaddr,
uint16_t portno)
{
FAR struct tcp_conn_s *conn;
int i;
/* Check if this port number is in use by any active UIP TCP connection */
for (i = 0; i < CONFIG_NET_TCP_CONNS; i++)
{
conn = &g_tcp_connections[i];
/* Check if this connection is open and the local port assignment
* matches the requested port number.
*/
if (conn->tcpstateflags != TCP_CLOSED && conn->lport == portno
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
&& domain == conn->domain
#endif
)
{
/* If there are multiple interface devices, then the local IP
* address of the connection must also match. INADDR_ANY is a
* special case: There can only be instance of a port number
* with INADDR_ANY.
*/
#ifdef CONFIG_NET_IPv4
#ifdef CONFIG_NET_IPv6
if (domain == PF_INET)
#endif
{
return tcp_ipv4_listener(ipaddr->ipv4, portno);
}
if (domain == PF_INET)
#endif /* CONFIG_NET_IPv6 */
{
if (net_ipv4addr_cmp(conn->u.ipv4.laddr, ipaddr->ipv4) ||
net_ipv4addr_cmp(conn->u.ipv4.laddr, INADDR_ANY))
{
/* The port number is in use, return the connection */
return conn;
}
}
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
#ifdef CONFIG_NET_IPv4
else
#endif
{
return tcp_ipv6_listener(ipaddr->ipv6, portno);
}
else
#endif /* CONFIG_NET_IPv4 */
{
if (net_ipv6addr_cmp(conn->u.ipv6.laddr, ipaddr->ipv6) ||
net_ipv6addr_cmp(conn->u.ipv6.laddr, g_ipv6_unspecaddr))
{
/* The port number is in use, return the connection */
return conn;
}
}
#endif /* CONFIG_NET_IPv6 */
}
}
return NULL;
}
/****************************************************************************