#include <linux/module.h> #include <linux/inetdevice.h> #include <linux/netdevice.h> #include <linux/types.h> #include <linux/if_ether.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/in.h> #include <linux/inet.h> #include <linux/socket.h> #include <linux/netfilter.h> #include <linux/netfilter_ipv4.h> #include <net/netfilter/nf_conntrack.h> #include <linux/netfilter/nf_conntrack_tuple_common.h> #include <linux/netfilter/nf_conntrack_common.h> #include <linux/version.h> #include <net/sock.h> #include <net/route.h> #include <net/flow.h>和#include <linux/module.h> #include <linux/inetdevice.h> #include <linux/netdevice.h> #include <linux/types.h> #include <linux/if_ether.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/in.h> #include <linux/inet.h> #include <linux/socket.h> #include <linux/version.h> #include <linux/netfilter.h> #include <net/sock.h> #include <net/route.h> #include <net/flow.h> #include <net/ip.h>对应的在vpp中的头文件

在vpp中，这些头文件对应的可能是：

- <vnet/vnet.h>：包含了许多与网络相关的数据类型、函数和宏定义。
- <vnet/ip/ip.h>：包含了IP协议相关的数据类型、函数和宏定义。
- <vnet/tcp/tcp.h>：包含了TCP协议相关的数据类型、函数和宏定义。
- <vnet/udp/udp.h>：包含了UDP协议相关的数据类型、函数和宏定义。
- <vnet/ethernet/ethernet.h>：包含了以太网协议相关的数据类型、函数和宏定义。
- <vnet/ip/ip4.h>：包含了IPv4协议相关的数据类型、函数和宏定义。
- <vnet/ip/ip6.h>：包含了IPv6协议相关的数据类型、函数和宏定义。
- <vnet/tcp/tcp_header.h>：包含了TCP报文头相关的数据类型、函数和宏定义。
- <vnet/udp/udp_header.h>：包含了UDP报文头相关的数据类型、函数和宏定义。

相关问题

linux mac802.11,linux wireless 基础知识 MAC80211 CFG80211(示例代码)

Linux中的MAC80211和CFG80211是用于无线网络的子系统。它们提供了一组API，使开发人员能够在Linux内核中实现无线网络设备驱动程序。

MAC80211是一个实现IEEE 802.11标准的软件模块，它负责管理Linux内核中的无线网络设备。它为网络设备提供了一组接口，使它们能够与其他网络设备进行通信。MAC80211还负责处理无线帧和管理无线网络的连接。

CFG80211是一个用于配置802.11设备的API。它负责管理无线网络设备的配置，例如频率、信道和加密设置等。它还提供了一组接口，使用户空间应用程序能够与无线网络设备进行通信。

示例代码：

以下代码展示了如何使用CFG80211 API在Linux内核中配置无线网络设备。

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/wireless.h>
#include <net/cfg80211.h>

static struct cfg80211_ops my_cfg_ops = {
    .change_beacon = NULL,
};

static struct cfg80211_device my_cfg_device = {
    .ops = &my_cfg_ops,
};

static int __init my_init(void)
{
    int ret;
    struct wireless_dev *wdev;

    wdev = kzalloc(sizeof(*wdev), GFP_KERNEL);
    if (!wdev)
        return -ENOMEM;

    wdev->wiphy = wiphy_new(&my_cfg_ops, sizeof(*wdev));
    if (!wdev->wiphy) {
        kfree(wdev);
        return -ENOMEM;
    }

    wdev->wiphy->privid++;
    wdev->wiphy->dev.parent = NULL;
    wdev->wiphy->dev.release = NULL;
    wdev->wiphy->dev.groups = NULL;
    wdev->wiphy->dev.dma_mask = NULL;
    wdev->wiphy->dev.coherent_dma_mask = ~0;

    ret = wiphy_register(wdev->wiphy);
    if (ret) {
        wiphy_free(wdev->wiphy);
        kfree(wdev);
        return ret;
    }

    wdev->wiphy->dev.parent = wiphy_dev(wdev->wiphy);
    wdev->netdev = alloc_netdev_mqs(sizeof(struct net_device *), "my_dev",
                                    NET_NAME_UNKNOWN, ether_setup,
                                    1, 1);
    if (!wdev->netdev) {
        wiphy_unregister(wdev->wiphy);
        wiphy_free(wdev->wiphy);
        kfree(wdev);
        return -ENOMEM;
    }

    wdev->wiphy->privid++;
    wdev->netdev->ieee80211_ptr = wdev;
    wdev->netdev->ieee80211_ptr->iftype = NL80211_IFTYPE_STATION;
    wdev->netdev->ieee80211_ptr->flags |= IEEE80211_STA_CONNECTION_POLL;

    ret = register_netdev(wdev->netdev);
    if (ret) {
        free_netdev(wdev->netdev);
        wiphy_unregister(wdev->wiphy);
        wiphy_free(wdev->wiphy);
        kfree(wdev);
        return ret;
    }

    my_cfg_device.wiphy = wdev->wiphy;
    ret = cfg80211_register_device(&my_cfg_device);
    if (ret) {
        unregister_netdev(wdev->netdev);
        free_netdev(wdev->netdev);
        wiphy_unregister(wdev->wiphy);
        wiphy_free(wdev->wiphy);
        kfree(wdev);
        return ret;
    }

    return 0;
}

static void __exit my_exit(void)
{
    cfg80211_unregister_device(&my_cfg_device);
    unregister_netdev(wdev->netdev);
    free_netdev(wdev->netdev);
    wiphy_unregister(wdev->wiphy);
    wiphy_free(wdev->wiphy);
    kfree(wdev);
}

module_init(my_init);
module_exit(my_exit);
MODULE_LICENSE("GPL");

这段代码首先创建了一个无线设备和一个无线网络接口。然后，它将无线设备注册到CFG80211子系统中，并将无线网络接口注册到Linux内核中。最后，它将无线设备和无线网络接口添加到一个数据结构中，并将该数据结构注册到CFG80211子系统中。

lan8720 linux驱动

LAN8720是一款常用的以太网PHY芯片，它可以通过RMII或MII接口与Linux系统连接。下面是一个可能的LAN8720 Linux驱动程序的示例代码：

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/of.h>
#include <linux/of_device.h>

/* LAN8720 PHY registers */
#define LAN8720_REG_BCR     0x00    /* Basic Control Register */
#define LAN8720_REG_BSR     0x01    /* Basic Status Register */
#define LAN8720_REG_PHYID1  0x02    /* PHY Identifier 1 */
#define LAN8720_REG_PHYID2  0x03    /* PHY Identifier 2 */
#define LAN8720_REG_ANAR    0x04    /* Auto-Negotiation Advertisement Register */
#define LAN8720_REG_ANLPAR  0x05    /* Auto-Negotiation Link Partner Ability Register */
#define LAN8720_REG_ANER    0x06    /* Auto-Negotiation Expansion Register */
#define LAN8720_REG_DSCR    0x10    /* PCS/TX Descriptor Register */
#define LAN8720_REG_DSCSR   0x11    /* PCS/TX Descriptor and Status Register */
#define LAN8720_REG_PHYCR   0x19    /* PHY Control Register */

#define LAN8720_PHY_RESET_DELAY_MS      100

struct lan8720_priv {
    struct device *dev;
    struct net_device *netdev;
    void __iomem *regs;
};

static int lan8720_mdio_read(struct mii_bus *bus, int phy_addr, int reg_addr)
{
    struct lan8720_priv *priv = bus->priv;
    void __iomem *regs = priv->regs;
    int val;

    writel(0x80000000 | (phy_addr << 23) | (reg_addr << 18), regs + LAN8720_REG_DSCR);
    while (!(readl(regs + LAN8720_REG_DSCSR) & 0x80000000));
    val = readl(regs + LAN8720_REG_DSCR) & 0xffff;
    return val;
}

static int lan8720_mdio_write(struct mii_bus *bus, int phy_addr, int reg_addr, u16 val)
{
    struct lan8720_priv *priv = bus->priv;
    void __iomem *regs = priv->regs;

    writel(0xc0000000 | (phy_addr << 23) | (reg_addr << 18) | val, regs + LAN8720_REG_DSCR);
    while (!(readl(regs + LAN8720_REG_DSCSR) & 0x80000000));
    return 0;
}

static int lan8720_phy_reset(struct lan8720_priv *priv)
{
    u16 val;

    /* Reset PHY */
    lan8720_mdio_write(priv->netdev->mdio_bus, priv->netdev->phydev->addr, LAN8720_REG_BCR, 0x8000);
    msleep(LAN8720_PHY_RESET_DELAY_MS);

    /* Wait for PHY to come out of reset */
    val = lan8720_mdio_read(priv->netdev->mdio_bus, priv->netdev->phydev->addr, LAN8720_REG_BCR);
    if (val & 0x8000)
        return -EBUSY;

    return 0;
}

static int lan8720_phy_init(struct lan8720_priv *priv)
{
    u16 val;

    /* Reset PHY */
    if (lan8720_phy_reset(priv))
        return -EBUSY;

    /* Enable auto-negotiation */
    lan8720_mdio_write(priv->netdev->mdio_bus, priv->netdev->phydev->addr, LAN8720_REG_BCR, 0x1000);

    /* Wait for auto-negotiation to complete */
    do {
        val = lan8720_mdio_read(priv->netdev->mdio_bus, priv->netdev->phydev->addr, LAN8720_REG_BSR);
    } while (!(val & 0x0020));

    /* Enable RX/TX */
    lan8720_mdio_write(priv->netdev->mdio_bus, priv->netdev->phydev->addr, LAN8720_REG_BCR, 0x2000);

    return 0;
}

static int lan8720_probe(struct platform_device *pdev)
{
    struct lan8720_priv *priv;
    struct net_device *netdev;
    struct device_node *np = pdev->dev.of_node;
    struct resource *res;
    int ret;

    /* Allocate private data */
    priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
    if (!priv)
        return -ENOMEM;

    /* Allocate netdev */
    netdev = alloc_etherdev(sizeof(*priv));
    if (!netdev)
        return -ENOMEM;

    /* Set netdev MAC address */
    of_property_read_u8_array(np, "local-mac-address", netdev->dev_addr, ETH_ALEN);

    /* Initialize netdev */
    netdev->netdev_ops = &lan8720_netdev_ops;
    netdev->ethtool_ops = &lan8720_ethtool_ops;
    netdev->needs_free_netdev = true;
    netif_napi_add(netdev, &priv->napi, lan8720_rx_napi, NAPI_POLL_WEIGHT);

    /* Allocate MDIO bus */
    netdev->phydev = mdiobus_alloc();
    if (!netdev->phydev) {
        free_netdev(netdev);
        return -ENOMEM;
    }

    /* Set MDIO bus parameters */
    netdev->phydev->bus = priv->netdev->mdio_bus;
    netdev->phydev->mdio_read = lan8720_mdio_read;
    netdev->phydev->mdio_write = lan8720_mdio_write;
    netdev->phydev->priv = priv;

    /* Initialize PHY */
    ret = lan8720_phy_init(priv);
    if (ret) {
        mdiobus_free(netdev->phydev->bus);
        free_netdev(netdev);
        return ret;
    }

    /* Set netdev device and add it to network interface */
    priv->dev = &pdev->dev;
    priv->netdev = netdev;
    platform_set_drvdata(pdev, priv);
    ret = register_netdev(netdev);
    if (ret) {
        mdiobus_free(netdev->phydev->bus);
        free_netdev(netdev);
        return ret;
    }

    return 0;
}

static int lan8720_remove(struct platform_device *pdev)
{
    struct lan8720_priv *priv = platform_get_drvdata(pdev);

    unregister_netdev(priv->netdev);
    mdiobus_free(priv->netdev->phydev->bus);
    free_netdev(priv->netdev);

    return 0;
}

static const struct of_device_id lan8720_of_match[] = {
    { .compatible = "smsc,lan8720" },
    { },
};
MODULE_DEVICE_TABLE(of, lan8720_of_match);

static struct platform_driver lan8720_driver = {
    .probe = lan8720_probe,
    .remove = lan8720_remove,
    .driver = {
        .name = "lan8720",
        .of_match_table = lan8720_of_match,
    },
};

module_platform_driver(lan8720_driver);

MODULE_AUTHOR("Your Name Here");
MODULE_DESCRIPTION("LAN8720 driver");
MODULE_LICENSE("GPL");

需要注意的是，以上示例代码只是一个框架，实际的驱动程序需要根据硬件的具体特性进行实现。另外，该驱动程序还包含了一个NAPI驱动程序，以便在高速网络环境下进行数据接收。