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net: modify find device logic 

The priorities for finding a network adapter are as follows:
1. if laddr is not ANY, use laddr to find device;
2. if laddr is ANY, and bound index is not 0, use bound index
   to find device;
3. if laddr is ANY and no device is bound, use raddr to find
   device.

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
This commit is contained in:
zhanghongyu 2023-02-09 15:35:00 +08:00 committed by Xiang Xiao
parent a66f0a6369
commit a2097cfb71
6 changed files with 61 additions and 206 deletions
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2
net/icmp/icmp_sendmsg.c
View File

@ -306,7 +306,7 @@ ssize_t icmp_sendmsg(FAR struct socket *psock, FAR struct msghdr *msg,
#ifdef CONFIG_NET_BINDTODEVICE
if (conn->sconn.s_boundto != 0)
{
dev = net_bound_device(&conn->sconn);
dev = netdev_findbyindex(conn->sconn.s_boundto);
}
else
#endif

16
net/tcp/tcp_finddev.c
View File

@ -77,7 +77,13 @@ static int tcp_find_ipv4_device(FAR struct tcp_conn_s *conn,
{
if (local)
{
conn->dev = net_bound_device(&conn->sconn);
#ifdef CONFIG_NET_BINDTODEVICE
if (conn->sconn.s_boundto != 0)
{
conn->dev = netdev_findbyindex(conn->sconn.s_boundto);
}
#endif
return OK;
}
@ -133,7 +139,13 @@ static int tcp_find_ipv6_device(FAR struct tcp_conn_s *conn,
{
if (local)
{
conn->dev = net_bound_device(&conn->sconn);
#ifdef CONFIG_NET_BINDTODEVICE
if (conn->sconn.s_boundto != 0)
{
conn->dev = netdev_findbyindex(conn->sconn.s_boundto);
}
#endif
return OK;
}

133
net/udp/udp_finddev.c
View File

@ -143,6 +143,27 @@ udp_find_raddr_device(FAR struct udp_conn_s *conn,
{
in_addr_t raddr;
if (conn->u.ipv4.laddr != INADDR_ANY)
{
/* If the socket is bound to some non-zero, local address.
* Normal lookup using the verified local address.
*/
return netdev_findby_lipv4addr(conn->u.ipv4.laddr);
}
#ifdef CONFIG_NET_BINDTODEVICE
if (conn->sconn.s_boundto != 0)
{
/* If the socket is bound to a local network device.
* Select the network device that has been bound.
* If the index is invalid, return NULL.
*/
return netdev_findbyindex(conn->sconn.s_boundto);
}
#endif
if (remote)
{
FAR const struct sockaddr_in *inaddr =
@ -154,50 +175,9 @@ udp_find_raddr_device(FAR struct udp_conn_s *conn,
net_ipv4addr_copy(raddr, conn->u.ipv4.raddr);
}
/* Check if the remote, destination address is the broadcast
* or multicast address. If this is the case, select the device
* using the locally bound address (assuming that there is one).
*/
/* Normal lookup using the verified remote address */
if (raddr == INADDR_BROADCAST || IN_MULTICAST(NTOHL(raddr)))
{
/* Make sure that the socket is bound to some non-zero, local
* address. Zero is used as an indication that the laddr is
* uninitialized and that the socket is, hence, not bound.
*/
if (conn->u.ipv4.laddr == 0) /* INADDR_ANY */
{
/* Return the device bound to this UDP socket, if any */
return net_bound_device(&conn->sconn);
}
else
{
return netdev_findby_ripv4addr(conn->u.ipv4.laddr,
conn->u.ipv4.laddr);
}
}
/* There is no unique device associated with the unspecified
* address.
*/
else if (raddr != INADDR_ANY)
{
/* Normal lookup using the verified remote address */
return netdev_findby_ripv4addr(conn->u.ipv4.laddr,
raddr);
}
else
{
/* Not a suitable IPv4 unicast address for device lookup.
* Return the device bound to this UDP socket, if any.
*/
return net_bound_device(&conn->sconn);
}
return netdev_findby_ripv4addr(conn->u.ipv4.laddr, raddr);
}
#endif
@ -208,6 +188,27 @@ udp_find_raddr_device(FAR struct udp_conn_s *conn,
{
net_ipv6addr_t raddr;
if (!net_ipv6addr_cmp(conn->u.ipv6.laddr, g_ipv6_unspecaddr))
{
/* If the socket is bound to some non-zero, local address.
* Normal lookup using the verified local address.
*/
return netdev_findby_lipv6addr(conn->u.ipv6.laddr);
}
#ifdef CONFIG_NET_BINDTODEVICE
if (conn->sconn.s_boundto != 0)
{
/* If the socket is bound to a local network device.
* Select the network device that has been bound.
* If the index is invalid, return NULL.
*/
return netdev_findbyindex(conn->sconn.s_boundto);
}
#endif
if (remote)
{
FAR const struct sockaddr_in6 *inaddr =
@ -219,51 +220,9 @@ udp_find_raddr_device(FAR struct udp_conn_s *conn,
net_ipv6addr_copy(raddr, conn->u.ipv6.raddr);
}
/* Check if the remote, destination address is a multicast
* address. If this is the case, select the device
* using the locally bound address (assuming that there is one).
*/
/* Normal lookup using the verified remote address */
if (net_is_addr_mcast(raddr))
{
/* Make sure that the socket is bound to some non-zero, local
* address. The IPv6 unspecified address is used as an
* indication that the laddr is uninitialized and that the
* socket is, hence, not bound.
*/
if (net_ipv6addr_cmp(conn->u.ipv6.laddr, g_ipv6_unspecaddr))
{
/* Return the device bound to this UDP socket, if any */
return net_bound_device(&conn->sconn);
}
else
{
return netdev_findby_ripv6addr(conn->u.ipv6.laddr,
conn->u.ipv6.laddr);
}
}
/* There is no unique device associated with the unspecified
* address.
*/
else if (!net_ipv6addr_cmp(raddr, g_ipv6_unspecaddr))
{
/* Normal lookup using the verified remote address */
return netdev_findby_ripv6addr(conn->u.ipv6.laddr,
raddr);
}
else
{
/* Not a suitable IPv6 unicast address for device lookup.
* Return the device bound to this UDP socket, if any.
*/
return net_bound_device(&conn->sconn);
}
return netdev_findby_ripv6addr(conn->u.ipv6.laddr, raddr);
}
#endif
}

6
net/utils/Make.defs
View File

@ -53,12 +53,6 @@ else ifeq ($(CONFIG_NET_ICMPv6),y)
endif
endif
# Bound device find
ifeq ($(CONFIG_NET_BINDTODEVICE),y)
NET_CSRCS += net_bounddev.c
endif
# Include utility build support
DEPPATH += --dep-path utils

85
net/utils/net_bounddev.c
View File

@ -1,85 +0,0 @@
/****************************************************************************
* net/utils/net_bounddev.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/net.h>
#include "netdev/netdev.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: net_bound_device
*
* Description:
* If the socket is bound to a device, return the reference to the
* bound device.
*
* Input Parameters:
* sconn - Socket connection structure (not currently used).
*
* Returned Value:
* A reference to the bound device. If the retained interface index no
* longer refers to a valid device, this function will unbind the device
* and return an arbitrary network device at the head of the list of
* registered devices. This supports legacy IPv4 DHCPD behavior when
* there is only a single registered network device.
*
****************************************************************************/
#ifdef CONFIG_NET_BINDTODEVICE
FAR struct net_driver_s *net_bound_device(FAR struct socket_conn_s *sconn)
{
FAR struct net_driver_s *dev = NULL;
/* Is the socket bound to a device? */
if (sconn->s_boundto != 0)
{
/* Yes..This socket has been bound to an interface. Convert the
* interface index into a device structure reference.
*/
dev = netdev_findbyindex(sconn->s_boundto);
if (dev == NULL)
{
/* No device? It must have been unregistered. Un-bind the
* socket.
*/
sconn->s_boundto = 0;
}
}
/* If no device was bound or the bound device is no longer valid,
* then let's try the default network device.
*/
return dev == NULL ? netdev_default() : dev;
}
#endif

25
net/utils/utils.h
View File

@ -311,31 +311,6 @@ uint16_t icmp_chksum_iob(FAR struct iob_s *iob);
uint16_t icmpv6_chksum(FAR struct net_driver_s *dev, unsigned int iplen);
#endif
/****************************************************************************
* Name: net_bound_device
*
* Description:
* If the socket is bound to a device, return the reference to the
* bound device.
*
* Input Parameters:
* sconn - Socket connection structure (not currently used).
*
* Returned Value:
* A reference to the bound device. If the retained interface index no
* longer refers to a valid device, this function will unbind the device
* and return an arbitrary network device at the head of the list of
* registered devices. This supports legacy IPv4 DHCPD behavior when
* there is only a single registered network device.
*
****************************************************************************/
#ifdef CONFIG_NET_BINDTODEVICE
FAR struct net_driver_s *net_bound_device(FAR struct socket_conn_s *sconn);
#else
# define net_bound_device(c) netdev_default();
#endif
#undef EXTERN
#ifdef __cplusplus
}