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net: Check listening connections when selecting ports

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Added check for port number on listen queue

Signed-off-by: zhangshuai39 <zhangshuai39@xiaomi.com>
This commit is contained in:
zhangshuai39 2025-01-24 09:26:21 +08:00 • committed by Xiang Xiao
parent 7ea747024d
commit 560aed72a4
2 changed files with 15 additions and 3 deletions
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12
net/tcp/tcp_conn.c
View file

@ -171,7 +171,17 @@ static FAR struct tcp_conn_s *
}
}
return NULL;
/* Check if this port number is in use by any listen TCP connection.
* Since tcp_findlistener only uses laddr internally, and laddr offset is
* 0 in the ip_binding_u union, ipaddr can be passed in through directly.
*/
#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
return tcp_findlistener((FAR union ip_binding_u *)ipaddr,
portno, domain);
#else
return tcp_findlistener((FAR union ip_binding_u *)ipaddr, portno);
#endif
}
/****************************************************************************

6
net/tcp/tcp_listen.c
View file

@ -111,7 +111,8 @@ FAR struct tcp_conn_s *tcp_findlistener(FAR union ip_binding_u *uaddr,
if (domain == PF_INET6)
# endif
{
if (net_ipv6addr_cmp(conn->u.ipv6.laddr, uaddr->ipv6.laddr) ||
if (net_ipv6addr_cmp(uaddr->ipv6.laddr, g_ipv6_unspecaddr) ||
net_ipv6addr_cmp(conn->u.ipv6.laddr, uaddr->ipv6.laddr) ||
net_ipv6addr_cmp(conn->u.ipv6.laddr, g_ipv6_unspecaddr))
{
/* Yes.. we found a listener on this port */
@ -126,7 +127,8 @@ FAR struct tcp_conn_s *tcp_findlistener(FAR union ip_binding_u *uaddr,
if (domain == PF_INET)
# endif
{
if (net_ipv4addr_cmp(conn->u.ipv4.laddr, uaddr->ipv4.laddr) ||
if (net_ipv4addr_cmp(uaddr->ipv4.laddr, INADDR_ANY) ||
net_ipv4addr_cmp(conn->u.ipv4.laddr, uaddr->ipv4.laddr) ||
net_ipv4addr_cmp(conn->u.ipv4.laddr, INADDR_ANY))
{
/* Yes.. we found a listener on this port */