Networking: Save the IP domain in the connection structure

include/nuttx/net/net.h

@@ -97,7 +97,7 @@ struct devif_callback_s;     /* Forward reference */
 struct socket
 {
   int16_t       s_crefs;     /* Reference count on the socket */
-  uint8_t       s_domain;    /* Domain: PF_INET, PF_INET6, or PF_PACKET */
+  uint8_t       s_domain;    /* IP domain: PF_INET, PF_INET6, or PF_PACKET */
   uint8_t       s_type;      /* Protocol type: Only SOCK_STREAM or SOCK_DGRAM */
   uint8_t       s_flags;     /* See _SF_* definitions */
 

net/socket/socket.c

@@ -192,7 +192,7 @@ int psock_socket(int domain, int type, int protocol, FAR struct socket *psock)
            * socket instance.
            */
 
-          FAR struct tcp_conn_s *conn = tcp_alloc();
+          FAR struct tcp_conn_s *conn = tcp_alloc(domain);
           if (!conn)
             {
               /* Failed to reserve a connection structure */
@@ -219,7 +219,7 @@ int psock_socket(int domain, int type, int protocol, FAR struct socket *psock)
            * socket instance.
            */
 
-          FAR struct udp_conn_s *conn = udp_alloc();
+          FAR struct udp_conn_s *conn = udp_alloc(domain);
           if (!conn)
             {
               /* Failed to reserve a connection structure */

net/tcp/tcp.h

@@ -112,6 +112,7 @@ struct tcp_conn_s
                            * receive next */
   uint8_t  sndseq[4];     /* The sequence number that was last sent by us */
   uint8_t  crefs;         /* Reference counts on this instance */
+  uint8_t  domain;        /* IP domain: PF_INET or PF_INET6 */
   uint8_t  sa;            /* Retransmission time-out calculation state
                            * variable */
   uint8_t  sv;            /* Retransmission time-out calculation state
@@ -290,7 +291,7 @@ void tcp_initialize(void);
  *
  ****************************************************************************/
 
-FAR struct tcp_conn_s *tcp_alloc(void);
+FAR struct tcp_conn_s *tcp_alloc(uint8_t domain);
 
 /****************************************************************************
  * Name: tcp_free

net/tcp/tcp_conn.c

@@ -277,7 +277,7 @@ void tcp_initialize(void)
  *
  ****************************************************************************/
 
-FAR struct tcp_conn_s *tcp_alloc(void)
+FAR struct tcp_conn_s *tcp_alloc(uint8_t domain)
 {
   FAR struct tcp_conn_s *conn;
   net_lock_t flags;
@@ -374,6 +374,7 @@ FAR struct tcp_conn_s *tcp_alloc(void)
     {
       memset(conn, 0, sizeof(struct tcp_conn_s));
       conn->tcpstateflags = TCP_ALLOCATED;
+      conn->domain        = domain;
     }
 
   return conn;
@@ -587,7 +588,11 @@ FAR struct tcp_conn_s *tcp_alloc_accept(FAR struct net_driver_s *dev,
   FAR struct net_iphdr_s *ip = IPv4;
   FAR struct tcp_conn_s *conn;
 
-  conn = tcp_alloc();
+#ifdef CONFIG_NET_IPv4
+  conn = tcp_alloc(PF_INET);
+#else
+  conn = tcp_alloc(PF_INET6);
+#endif
   if (conn)
     {
       /* Fill in the necessary fields for the new connection. */

net/udp/udp.h

@@ -70,6 +70,7 @@ struct udp_conn_s
   union ip_binding_u u;   /* IP address binding */
   uint16_t lport;         /* Bound local port number (network byte order) */
   uint16_t rport;         /* Remote port number (network byte order) */
+  uint8_t  domain;        /* IP domain: PF_INET or PF_INET6 */
   uint8_t  ttl;           /* Default time-to-live */
   uint8_t  crefs;         /* Reference counts on this instance */
 
@@ -99,7 +100,7 @@ struct udp_iphdr_s;   /* Forward reference */
 
 /* Defined in udp_conn.c ****************************************************/
 /****************************************************************************
- * Name: udp_initialize()
+ * Name: udp_initialize
  *
  * Description:
  *   Initialize the UDP connection structures.  Called once and only from
@@ -110,7 +111,7 @@ struct udp_iphdr_s;   /* Forward reference */
 void udp_initialize(void);
 
 /****************************************************************************
- * Name: udp_alloc()
+ * Name: udp_alloc
  *
  * Description:
  *   Allocate a new, uninitialized UDP connection structure.  This is
@@ -118,10 +119,10 @@ void udp_initialize(void);
  *
  ****************************************************************************/
 
-FAR struct udp_conn_s *udp_alloc(void);
+FAR struct udp_conn_s *udp_alloc(uint8_t domain);
 
 /****************************************************************************
- * Name: udp_free()
+ * Name: udp_free
  *
  * Description:
  *   Free a UDP connection structure that is no longer in use. This should be
@@ -132,7 +133,7 @@ FAR struct udp_conn_s *udp_alloc(void);
 void udp_free(FAR struct udp_conn_s *conn);
 
 /****************************************************************************
- * Name: udp_active()
+ * Name: udp_active
  *
  * Description:
  *   Find a connection structure that is the appropriate
@@ -147,7 +148,7 @@ FAR struct udp_conn_s *udp_active(FAR struct net_driver_s *dev,
                                   FAR struct udp_hdr_s *udp);
 
 /****************************************************************************
- * Name: udp_nextconn()
+ * Name: udp_nextconn
  *
  * Description:
  *   Traverse the list of allocated UDP connections
@@ -160,7 +161,7 @@ FAR struct udp_conn_s *udp_active(FAR struct net_driver_s *dev,
 FAR struct udp_conn_s *udp_nextconn(FAR struct udp_conn_s *conn);
 
 /****************************************************************************
- * Name: udp_bind()
+ * Name: udp_bind
  *
  * Description:
  *   This function implements the low-level parts of the standard UDP bind()
@@ -178,7 +179,7 @@ int udp_bind(FAR struct udp_conn_s *conn, FAR const struct sockaddr_in *addr);
 #endif
 
 /****************************************************************************
- * Name: udp_connect()
+ * Name: udp_connect
  *
  * Description:
  *   This function sets up a new UDP connection. The function will

net/udp/udp_conn.c

@@ -242,7 +242,7 @@ static uint16_t udp_select_port(void)
  ****************************************************************************/
 
 /****************************************************************************
- * Name: udp_initialize()
+ * Name: udp_initialize
  *
  * Description:
  *   Initialize the UDP connection structures.  Called once and only from
@@ -272,7 +272,7 @@ void udp_initialize(void)
 }
 
 /****************************************************************************
- * Name: udp_alloc()
+ * Name: udp_alloc
  *
  * Description:
  *   Allocate a new, uninitialized UDP connection structure.  This is
@@ -280,7 +280,7 @@ void udp_initialize(void)
  *
  ****************************************************************************/
 
-FAR struct udp_conn_s *udp_alloc(void)
+FAR struct udp_conn_s *udp_alloc(uint8_t domain)
 {
   FAR struct udp_conn_s *conn;
 
@@ -294,7 +294,8 @@ FAR struct udp_conn_s *udp_alloc(void)
     {
       /* Make sure that the connection is marked as uninitialized */
 
-      conn->lport = 0;
+      conn->domain = domain;
+      conn->lport  = 0;
 
       /* Enqueue the connection into the active list */
 
@@ -306,7 +307,7 @@ FAR struct udp_conn_s *udp_alloc(void)
 }
 
 /****************************************************************************
- * Name: udp_free()
+ * Name: udp_free
  *
  * Description:
  *   Free a UDP connection structure that is no longer in use. This should be
@@ -336,7 +337,7 @@ void udp_free(FAR struct udp_conn_s *conn)
 }
 
 /****************************************************************************
- * Name: udp_active()
+ * Name: udp_active
  *
  * Description:
  *   Find a connection structure that is the appropriate
@@ -402,7 +403,7 @@ FAR struct udp_conn_s *udp_active(FAR struct net_driver_s *dev,
 }
 
 /****************************************************************************
- * Name: udp_nextconn()
+ * Name: udp_nextconn
  *
  * Description:
  *   Traverse the list of allocated UDP connections
@@ -426,7 +427,7 @@ FAR struct udp_conn_s *udp_nextconn(FAR struct udp_conn_s *conn)
 }
 
 /****************************************************************************
- * Name: udp_bind()
+ * Name: udp_bind
  *
  * Description:
  *   This function implements the low level parts of the standard UDP
@@ -509,7 +510,7 @@ int udp_bind(FAR struct udp_conn_s *conn, FAR const struct sockaddr_in *addr)
 }
 
 /****************************************************************************
- * Name: udp_connect()
+ * Name: udp_connect
  *
  * Description:
  *   This function simply assigns a remote address to UDP "connection"