[lwIP] apply AF_UNIX feature (#6954)

components/net/lwip/port/ethernetif.c

@@ -647,6 +647,169 @@ void eth_device_deinit(struct eth_device *dev)
  rt_free(netif);
 }
 
+#ifdef SAL_USING_AF_UNIX /* create loopback netdev */
+static err_t af_unix_eth_netif_device_init(struct netif *netif)
+{
+ struct eth_device *ethif;
+
+ ethif = (struct eth_device*)netif->state;
+ if (ethif != RT_NULL)
+ {
+ rt_device_t device;
+
+#ifdef RT_USING_NETDEV
+ /* network interface device register */
+ netdev_add(netif);
+#endif /* RT_USING_NETDEV */
+
+ /* get device object */
+ device = (rt_device_t) ethif;
+ if (rt_device_init(device) != RT_EOK)
+ {
+ return ERR_IF;
+ }
+ if (rt_device_open(device, RT_DEVICE_FLAG_RDWR) != RT_EOK)
+ {
+ return ERR_IF;
+ }
+
+ /* copy device flags to netif flags */
+ netif->flags = (ethif->flags & 0xff);
+ netif->mtu = ETHERNET_MTU;
+
+ /* set output */
+ netif->output = etharp_output;
+
+#if LWIP_IPV6
+ netif->output_ip6 = ethip6_output;
+ netif->ip6_autoconfig_enabled = 1;
+ netif_create_ip6_linklocal_address(netif, 1);
+
+#if LWIP_IPV6_MLD
+ netif->flags |= NETIF_FLAG_MLD6;
+
+ /*
+ * For hardware/netifs that implement MAC filtering.
+ * All-nodes link-local is handled by default, so we must let the hardware know
+ * to allow multicast packets in.
+ * Should set mld_mac_filter previously. */
+ if (netif->mld_mac_filter != NULL)
+ {
+ ip6_addr_t ip6_allnodes_ll;
+ ip6_addr_set_allnodes_linklocal(&ip6_allnodes_ll);
+ netif->mld_mac_filter(netif, &ip6_allnodes_ll, NETIF_ADD_MAC_FILTER);
+ }
+#endif /* LWIP_IPV6_MLD */
+
+#endif /* LWIP_IPV6 */
+
+ /* set default netif */
+ if (netif_default == RT_NULL)
+ netif_set_default(ethif->netif);
+
+ /* set interface up */
+ netif_set_up(ethif->netif);
+
+
+ if (ethif->flags & ETHIF_LINK_PHYUP)
+ {
+ /* set link_up for this netif */
+ netif_set_link_up(ethif->netif);
+ }
+
+#ifdef RT_USING_NETDEV
+ /* network interface device flags synchronize */
+ netdev_flags_sync(netif);
+#endif /* RT_USING_NETDEV */
+
+ return ERR_OK;
+ }
+
+ return ERR_IF;
+}
+
+/* Keep old drivers compatible in RT-Thread */
+rt_err_t af_unix_eth_device_init_with_flag(struct eth_device *dev, const char *name, rt_uint16_t flags)
+{
+ struct netif* netif;
+#if LWIP_NETIF_HOSTNAME
+#define LWIP_HOSTNAME_LEN 16
+ char *hostname = RT_NULL;
+ netif = (struct netif*) rt_calloc (1, sizeof(struct netif) + LWIP_HOSTNAME_LEN);
+#else
+ netif = (struct netif*) rt_calloc (1, sizeof(struct netif));
+#endif
+ if (netif == RT_NULL)
+ {
+ rt_kprintf("malloc netif failed\n");
+ return -RT_ERROR;
+ }
+
+ /* set netif */
+ dev->netif = netif;
+ dev->flags = flags;
+ /* link changed status of device */
+ dev->link_changed = 0x00;
+ /* avoid send the same mail to mailbox */
+ dev->rx_notice = 0x00;
+ dev->parent.type = RT_Device_Class_NetIf;
+ /* register to RT-Thread device manager */
+ rt_device_register(&(dev->parent), name, RT_DEVICE_FLAG_RDWR);
+
+ /* set name */
+ netif->name[0] = name[0];
+ netif->name[1] = name[1];
+
+ /* set hw address to 6 */
+ netif->hwaddr_len = 6;
+ /* maximum transfer unit */
+ netif->mtu = ETHERNET_MTU;
+
+ /* set linkoutput */
+ netif->linkoutput = ethernetif_linkoutput;
+
+ /* get hardware MAC address */
+ rt_device_control(&(dev->parent), NIOCTL_GADDR, netif->hwaddr);
+
+#if LWIP_NETIF_HOSTNAME
+ /* Initialize interface hostname */
+ hostname = (char *)netif + sizeof(struct netif);
+ rt_sprintf(hostname, "rtthread_%02x%02x", name[0], name[1]);
+ netif->hostname = hostname;
+#endif /* LWIP_NETIF_HOSTNAME */
+
+ /* if tcp thread has been started up, we add this netif to the system */
+ if (rt_thread_find("tcpip") != RT_NULL)
+ {
+#if LWIP_VERSION_MAJOR == 1U /* v1.x */
+ struct ip_addr ipaddr, netmask, gw;
+#else /* >= v2.x */
+ ip4_addr_t ipaddr, netmask, gw;
+#endif /* LWIP_VERSION_MAJOR == 1U */
+
+ ipaddr.addr = inet_addr("127.0.0.1");
+ gw.addr = inet_addr("255.0.0.0");
+ netmask.addr = inet_addr("127.0.0.1");
+
+ netifapi_netif_add(netif, &ipaddr, &netmask, &gw, dev, af_unix_eth_netif_device_init, tcpip_input);
+ }
+
+ return RT_EOK;
+}
+
+rt_err_t af_unix_eth_device_init(struct eth_device * dev, const char *name)
+{
+ rt_uint16_t flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;
+
+#if LWIP_IGMP
+ /* IGMP support */
+ flags |= NETIF_FLAG_IGMP;
+#endif
+
+ return af_unix_eth_device_init_with_flag(dev, name, flags);
+}
+#endif /* SAL_USING_AF_UNIX */
+
 #ifndef LWIP_NO_RX_THREAD
 rt_err_t eth_device_ready(struct eth_device* dev)
 {

components/net/sal/Kconfig

@@ -34,6 +34,11 @@ if RT_USING_SAL
  Enable BSD socket operated by file system API
  Let BSD socket operated by file system API, such as read/write and involveed in select/poll POSIX APIs.
 
+ config SAL_USING_AF_UNIX
+ bool "Enable support AF_UNIX socket"
+ default n
+ default y if RT_USING_SMART
+
  config SAL_SOCKETS_NUM
  int "the maximum number of sockets"
  depends on !SAL_USING_POSIX