1219 lines
30 KiB
C
1219 lines
30 KiB
C
/*
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* 模块名称：Network Socket Core
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* 模块功能：BSD Socket API 核心实现，包括 Socket 管理、状态机、
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* 事件处理、数据收发等功能，底层调用 CH395F 驱动
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* 适用平台：STM32F4 系列（CH395F 以太网芯片）
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* 作者：王建锋
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* 创建日期：2026-07-18
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* 修改记录：
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*/
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#include "net_socket.h"
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#include "ch395f.h"
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#include "main.h"
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#include <string.h>
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#include <stdio.h>
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/*
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* 调试输出配置
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*/
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#define DBG_TAG "[NET]"
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#include "dbg_log.h"
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/*
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* 私有宏定义区
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*/
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/*
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* 私有变量区
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*/
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static net_sock_t g_net_socks[NET_MAX_SOCKETS]; /* Socket 控制块数组 */
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static int s_net_errno = 0; /* 最后错误码 */
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static uint8_t s_net_initialized = 0; /* 初始化标志 */
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/*
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* 私有宏定义区 - 补充
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*/
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#define NET_PHY_CHECK_INTERVAL_MS 5000U /* PHY 状态定期检查间隔（ms） */
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/*
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* 私有函数声明区
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*/
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static int alloc_socket(void);
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static void handle_connect_event(net_sock_t *sock);
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static void handle_disconnect_event(net_sock_t *sock);
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static void handle_recv_event(net_sock_t *sock);
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static void handle_send_event(net_sock_t *sock);
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static void handle_timeout_event(net_sock_t *sock);
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static void fire_event(net_sock_t *sock, net_event_t event);
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static void parse_ip_string(const char *str, uint8_t *ip_arr);
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/*
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* 公共函数实现区
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*/
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/*
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* 函数功能：网络子系统初始化
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*/
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int net_init(const char *ip, const char *mask, const char *gateway)
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{
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ch395f_status_t ret;
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/* 清零 Socket 控制块 */
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memset(g_net_socks, 0, sizeof(g_net_socks));
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s_net_errno = 0;
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s_net_initialized = 0;
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/* 检测 CH395F 芯片 */
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if (ch395f_check_exist() != CH395F_STATUS_OK)
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{
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s_net_errno = NET_ERR;
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return -1;
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}
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/* 复位芯片 */
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ch395f_reset();
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/* 启用 TCP Server 多连接模式（bit1=1）
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* Socket 0 专职监听，Socket 1~7 自动分配给新连接 */
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ch395f_set_fun_para(0x02);
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/* 设置 TCP MSS */
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ch395f_set_tcp_mss(1460);
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/* 设置 TCP 重传参数（必须在 INIT_CH395 之前） */
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ch395f_set_retrans_count(8); /* 重传 8 次 */
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ch395f_set_retrans_period(500); /* 每次间隔 500ms，总计 4s 重传窗口 */
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/* 设置 TCP KeepAlive 参数（必须在 INIT_CH395 之前，单位 ms，必须为 500 的倍数，IDLE > INTVL） */
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ch395f_set_keepalive_idle(60000); /* 空闲 60 秒后开始探测 */
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ch395f_set_keepalive_intvl(5000); /* 每 5 秒探测一次 */
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ch395f_set_keepalive_cnt(3); /* 最多探测 3 次 */
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/* 设置网络参数（必须在 INIT_CH395 之前） */
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if (ip != NULL)
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{
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uint8_t ip_arr[4];
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uint8_t mask_arr[4];
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uint8_t gw_arr[4];
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parse_ip_string(ip, ip_arr);
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parse_ip_string(mask, mask_arr);
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parse_ip_string(gateway, gw_arr);
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ch395f_set_ip_addr(ip_arr);
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ch395f_set_gwip_addr(gw_arr);
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ch395f_set_mask_addr(mask_arr);
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}
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else
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{
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/* 启用 DHCP */
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ch395f_set_dhcp(1);
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}
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/* 初始化 CH395F 协议栈（先不配置 buffer，测试默认值是否工作） */
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ret = ch395f_init();
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if (ret != CH395F_STATUS_OK)
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{
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s_net_errno = NET_ERR;
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return -1;
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}
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/* 使能 PING 响应 */
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ch395f_ping_enable(1);
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s_net_initialized = 1;
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return 0;
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}
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/*
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* 函数功能：轮询所有 Socket 状态
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*/
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int net_poll(void)
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{
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int event_count = 0;
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int i;
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uint16_t int_status;
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if (!s_net_initialized)
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{
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return 0;
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}
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/*
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* GPIO 轮询模式：仅在 INT# 有效（低电平）时读取中断状态
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* 读取 GET_GLOB_INT_STATUS_ALL 后 CH395F 拉高 INT#，若仍有中断则再次拉低
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*/
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do
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{
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if (HAL_GPIO_ReadPin(CH395_INT_GPIO_Port, CH395_INT_Pin) == GPIO_PIN_SET)
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{
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break;
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}
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int_status = ch395f_get_glob_int_status_all();
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if (int_status == 0)
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{
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break;
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}
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if (int_status & CH395F_GINT_STAT_PHY_CHANGE)
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{
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uint8_t phy = ch395f_get_phy_status();
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DBG_INFO("PHY_CHANGE: 0x%02X", phy);
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if (phy == CH395F_PHY_DISCONN)
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{
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DBG_ERROR("PHY disconnected, sockets may need recovery");
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}
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}
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/* 处理每个 Socket */
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for (i = 0; i < NET_MAX_SOCKETS; i++)
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{
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net_sock_t *sock = &g_net_socks[i];
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/* 检查该 Socket 是否有中断（全局中断状态 bit4~bit11 对应 socket0~7） */
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if (!(int_status & (1U << (i + 4))))
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{
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continue;
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}
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/* 读取 Socket 中断状态 */
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uint8_t sock_int = ch395f_get_sock_int_status(i);
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/* 连接事件 */
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if (sock_int & CH395F_SINT_STAT_CONNECT)
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{
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handle_connect_event(sock);
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event_count++;
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}
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/* 断开事件 */
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if (sock_int & CH395F_SINT_STAT_DISCONNECT)
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{
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handle_disconnect_event(sock);
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event_count++;
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}
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/* 数据接收事件 */
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if (sock_int & CH395F_SINT_STAT_RECV_OK)
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{
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handle_recv_event(sock);
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event_count++;
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}
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/* 发送完成事件 */
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if (sock_int & CH395F_SINT_STAT_SEND_OK)
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{
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handle_send_event(sock);
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event_count++;
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}
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/* 发送缓冲区空闲 */
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if (sock_int & CH395F_SINT_STAT_SENBUF_FREE)
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{
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sock->send_ready = 1;
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}
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/* 超时事件 */
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if (sock_int & CH395F_SINT_STAT_SOCK_TIMEOUT)
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{
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handle_timeout_event(sock);
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event_count++;
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}
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}
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/*
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* 处理完毕后检查 INT# 是否仍为低电平
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* 如果是，说明在处理期间有新中断产生，需要再次读取
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*
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* 注意：CH395F 的 RECV 中断是电平触发的（只要接收缓冲区有数据就保持低电平），
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* 如果不跳出循环，net_poll() 会无限循环处理 RECV 中断，
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* 导致主循环中的应用代码（如 echo）永远无法执行。
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* 因此每次 net_poll() 调用只处理一批中断，由主循环负责读取数据。
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*/
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} while (0);
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/* 每 2 秒打印一次诊断信息（调试用） */
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{
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static uint32_t s_last_dbg = 0;
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uint32_t now = HAL_GetTick();
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if (now - s_last_dbg >= 2000)
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{
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s_last_dbg = now;
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uint8_t int_level = (HAL_GPIO_ReadPin(CH395_INT_GPIO_Port, CH395_INT_Pin) == GPIO_PIN_RESET) ? 1 : 0;
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DBG_DEBUG("INT#=%d", int_level);
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for (i = 0; i < NET_MAX_SOCKETS; i++)
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{
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if (g_net_socks[i].in_use)
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{
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uint8_t st[2];
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ch395f_get_socket_status((uint8_t)i, st);
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uint16_t rl = ch395f_get_recv_len((uint8_t)i);
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DBG_DEBUG(" s%d:sw%d/tcp%d rl%d", i, st[0], st[1], rl);
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}
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}
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}
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}
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return event_count;
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}
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/*
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* 函数功能：创建 socket
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*/
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int net_socket(int domain, int type, int protocol)
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{
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int sockfd;
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net_sock_t *sock;
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/* 参数检查 */
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if (domain != NET_AF_INET)
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{
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s_net_errno = NET_ERR_INVAL;
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return -1;
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}
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/* 分配空闲 Socket */
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sockfd = alloc_socket();
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if (sockfd < 0)
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{
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s_net_errno = NET_ERR_NOMEM;
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return -1;
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}
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sock = &g_net_socks[sockfd];
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sock->ch395_sock = (uint8_t)sockfd;
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sock->type = (uint8_t)type;
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sock->state = NET_SOCK_STATE_CREATED;
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sock->in_use = 1;
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sock->send_ready = 1;
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return sockfd;
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}
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/*
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* 函数功能：绑定本地地址和端口
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*/
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int net_bind(int sockfd, const struct net_sockaddr *addr, int addrlen)
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{
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net_sock_t *sock;
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const struct net_sockaddr_in *addr_in;
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/* 参数检查 */
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if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
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{
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s_net_errno = NET_ERR_BADF;
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return -1;
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}
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sock = &g_net_socks[sockfd];
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if (!sock->in_use)
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{
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s_net_errno = NET_ERR_BADF;
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return -1;
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}
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if (addr == NULL || addrlen < (int)sizeof(struct net_sockaddr_in))
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{
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s_net_errno = NET_ERR_INVAL;
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return -1;
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}
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addr_in = (const struct net_sockaddr_in *)addr;
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/* 设置本地端口（转换为主机序） */
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sock->local_port = net_ntohs(addr_in->sin_port);
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sock->state = NET_SOCK_STATE_BOUND;
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return 0;
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}
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/*
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* 函数功能：TCP Server 监听
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*/
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int net_listen(int sockfd, int backlog)
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{
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net_sock_t *sock;
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uint8_t status;
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/* 参数检查 */
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if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
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{
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s_net_errno = NET_ERR_BADF;
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return -1;
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}
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sock = &g_net_socks[sockfd];
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if (!sock->in_use || sock->type != NET_SOCK_STREAM)
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{
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s_net_errno = NET_ERR_INVAL;
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return -1;
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}
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if (sock->state != NET_SOCK_STATE_BOUND &&
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sock->state != NET_SOCK_STATE_CREATED)
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{
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s_net_errno = NET_ERR_INVAL;
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return -1;
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}
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/* 配置 CH395F Socket */
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ch395f_set_proto_type(sockfd, CH395F_PROTO_TYPE_TCP);
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ch395f_set_sour_port(sockfd, sock->local_port);
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status = ch395f_open_socket(sockfd);
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if (status != CH395F_ERR_SUCCESS)
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{
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s_net_errno = NET_ERR_BUSY;
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return -1;
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}
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/* 启动 TCP 监听 */
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ch395f_tcp_listen(sockfd);
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/* 多连接模式：为数据 Socket 设置协议类型和源端口（不 OPEN）
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* CH395F 根据这些信息在客户端连接时自动分配空闲 Socket */
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for (int ds = NET_TCP_SERVER_DATA_SOCK_START; ds < NET_MAX_SOCKETS; ds++)
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{
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ch395f_set_proto_type((uint8_t)ds, CH395F_PROTO_TYPE_TCP);
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ch395f_set_sour_port((uint8_t)ds, sock->local_port);
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}
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sock->state = NET_SOCK_STATE_LISTENING;
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return 0;
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}
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/*
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* 函数功能：TCP Server 接受连接
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*/
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int net_accept(int sockfd, struct net_sockaddr *addr, int *addrlen)
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{
|
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net_sock_t *listen_sock;
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int i;
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/* 参数检查 */
|
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if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
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{
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s_net_errno = NET_ERR_BADF;
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return -1;
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}
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listen_sock = &g_net_socks[sockfd];
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if (!listen_sock->in_use || listen_sock->state != NET_SOCK_STATE_LISTENING)
|
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{
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s_net_errno = NET_ERR_INVAL;
|
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return -1;
|
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}
|
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|
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/* 轮询查找已建立连接的数据 Socket */
|
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net_poll();
|
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|
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for (i = 0; i < listen_sock->data_sock_count; i++)
|
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{
|
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int data_sock = listen_sock->data_socks[i];
|
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net_sock_t *data_cb = &g_net_socks[data_sock];
|
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|
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if (data_cb->state == NET_SOCK_STATE_ESTABLISHED)
|
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{
|
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/* 找到已建立连接的 Socket */
|
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if (addr != NULL && addrlen != NULL)
|
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{
|
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struct net_sockaddr_in *addr_in = (struct net_sockaddr_in *)addr;
|
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addr_in->sin_family = NET_AF_INET;
|
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addr_in->sin_port = net_htons(data_cb->remote_port);
|
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addr_in->sin_addr.s_addr = data_cb->remote_ip;
|
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*addrlen = sizeof(struct net_sockaddr_in);
|
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}
|
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|
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return data_sock;
|
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}
|
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}
|
||
|
||
/* 没有新连接 */
|
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s_net_errno = NET_ERR_WOULDBLOCK;
|
||
return -1;
|
||
}
|
||
|
||
/*
|
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* 函数功能：TCP Client 发起连接
|
||
*/
|
||
int net_connect(int sockfd, const struct net_sockaddr *addr, int addrlen)
|
||
{
|
||
net_sock_t *sock;
|
||
const struct net_sockaddr_in *addr_in;
|
||
uint8_t status;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use || sock->type != NET_SOCK_STREAM)
|
||
{
|
||
s_net_errno = NET_ERR_INVAL;
|
||
return -1;
|
||
}
|
||
|
||
if (addr == NULL || addrlen < (int)sizeof(struct net_sockaddr_in))
|
||
{
|
||
s_net_errno = NET_ERR_INVAL;
|
||
return -1;
|
||
}
|
||
|
||
addr_in = (const struct net_sockaddr_in *)addr;
|
||
|
||
/* 保存远端地址 */
|
||
sock->remote_ip = addr_in->sin_addr.s_addr;
|
||
sock->remote_port = net_ntohs(addr_in->sin_port);
|
||
|
||
/* 转换 IP 为数组格式（低字节在前） */
|
||
sock->remote_ip_arr[0] = (uint8_t)(sock->remote_ip);
|
||
sock->remote_ip_arr[1] = (uint8_t)(sock->remote_ip >> 8);
|
||
sock->remote_ip_arr[2] = (uint8_t)(sock->remote_ip >> 16);
|
||
sock->remote_ip_arr[3] = (uint8_t)(sock->remote_ip >> 24);
|
||
|
||
/* 配置 CH395F Socket */
|
||
ch395f_set_proto_type(sockfd, CH395F_PROTO_TYPE_TCP);
|
||
ch395f_set_sour_port(sockfd, sock->local_port);
|
||
ch395f_set_des_ip(sockfd, sock->remote_ip_arr);
|
||
ch395f_set_des_port(sockfd, sock->remote_port);
|
||
status = ch395f_open_socket(sockfd);
|
||
|
||
if (status != CH395F_ERR_SUCCESS)
|
||
{
|
||
s_net_errno = NET_ERR_BUSY;
|
||
return -1;
|
||
}
|
||
|
||
/* 发起 TCP 连接 */
|
||
ch395f_tcp_connect(sockfd);
|
||
sock->state = NET_SOCK_STATE_CONNECTING;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：发送数据（TCP）
|
||
*/
|
||
int net_send(int sockfd, const void *buf, int len, int flags)
|
||
{
|
||
net_sock_t *sock;
|
||
int sent = 0;
|
||
uint32_t tick_start;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use || sock->state != NET_SOCK_STATE_ESTABLISHED)
|
||
{
|
||
s_net_errno = NET_ERR_NOTCONN;
|
||
return -1;
|
||
}
|
||
|
||
if (buf == NULL || len <= 0)
|
||
{
|
||
s_net_errno = NET_ERR_INVAL;
|
||
return -1;
|
||
}
|
||
|
||
tick_start = HAL_GetTick();
|
||
|
||
/* 分块发送 */
|
||
while (sent < len)
|
||
{
|
||
int chunk = len - sent;
|
||
if (chunk > NET_SEND_BUF_SIZE)
|
||
{
|
||
chunk = NET_SEND_BUF_SIZE;
|
||
}
|
||
|
||
/* 检查发送缓冲区是否空闲 */
|
||
if (!sock->send_ready)
|
||
{
|
||
/* 超时检查 */
|
||
if (NET_SEND_TIMEOUT_MS > 0 &&
|
||
(HAL_GetTick() - tick_start) >= NET_SEND_TIMEOUT_MS)
|
||
{
|
||
s_net_errno = NET_ERR_TIMEDOUT;
|
||
break;
|
||
}
|
||
/* 继续轮询 */
|
||
net_poll();
|
||
continue;
|
||
}
|
||
|
||
ch395f_write_send_buf(sockfd, (uint8_t *)buf + sent, (uint16_t)chunk);
|
||
sock->send_ready = 0;
|
||
sent += chunk;
|
||
sock->send_bytes += (uint32_t)chunk;
|
||
|
||
/* 短暂延时等待发送完成 */
|
||
tick_start = HAL_GetTick();
|
||
while (!sock->send_ready)
|
||
{
|
||
net_poll();
|
||
if (NET_SEND_TIMEOUT_MS > 0 &&
|
||
(HAL_GetTick() - tick_start) >= NET_SEND_TIMEOUT_MS)
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return sent;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：接收数据（TCP）
|
||
*/
|
||
int net_recv(int sockfd, void *buf, int len, int flags)
|
||
{
|
||
net_sock_t *sock;
|
||
uint16_t recv_len;
|
||
uint32_t tick_start;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
/* 检查连接状态 */
|
||
if (sock->type == NET_SOCK_STREAM &&
|
||
sock->state != NET_SOCK_STATE_ESTABLISHED)
|
||
{
|
||
s_net_errno = NET_ERR_NOTCONN;
|
||
return -1;
|
||
}
|
||
|
||
if (buf == NULL || len <= 0)
|
||
{
|
||
s_net_errno = NET_ERR_INVAL;
|
||
return -1;
|
||
}
|
||
|
||
tick_start = HAL_GetTick();
|
||
|
||
while (1)
|
||
{
|
||
net_poll();
|
||
|
||
recv_len = ch395f_get_recv_len(sockfd);
|
||
if (recv_len > 0)
|
||
{
|
||
/* 有数据可读 */
|
||
int read_len = (recv_len > (uint16_t)len) ? len : (int)recv_len;
|
||
ch395f_read_recv_buf(sockfd, (uint8_t *)buf, (uint16_t)read_len);
|
||
sock->recv_bytes += (uint32_t)read_len;
|
||
return read_len;
|
||
}
|
||
|
||
/* 非阻塞模式检查 */
|
||
if (flags & NET_MSG_DONTWAIT)
|
||
{
|
||
s_net_errno = NET_ERR_WOULDBLOCK;
|
||
return -1;
|
||
}
|
||
|
||
/* 超时检查 */
|
||
if (NET_RECV_TIMEOUT_MS > 0 &&
|
||
(HAL_GetTick() - tick_start) >= NET_RECV_TIMEOUT_MS)
|
||
{
|
||
s_net_errno = NET_ERR_TIMEDOUT;
|
||
return -1;
|
||
}
|
||
|
||
/* 连接已断开检查 */
|
||
if (sock->state == NET_SOCK_STATE_TCP_ACCEPT)
|
||
{
|
||
return 0; /* 对端关闭 */
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：发送 UDP 数据
|
||
*/
|
||
int net_sendto(int sockfd, const void *buf, int len, int flags,
|
||
const struct net_sockaddr *dest_addr, int addrlen)
|
||
{
|
||
net_sock_t *sock;
|
||
const struct net_sockaddr_in *addr_in;
|
||
int sent = 0;
|
||
uint32_t tick_start;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
if (buf == NULL || len <= 0)
|
||
{
|
||
s_net_errno = NET_ERR_INVAL;
|
||
return -1;
|
||
}
|
||
|
||
/* UDP 模式：设置目标地址 */
|
||
if (dest_addr != NULL && addrlen >= (int)sizeof(struct net_sockaddr_in))
|
||
{
|
||
addr_in = (const struct net_sockaddr_in *)dest_addr;
|
||
|
||
/* 转换 IP 为数组格式 */
|
||
uint8_t ip_arr[4];
|
||
uint32_t ip = addr_in->sin_addr.s_addr;
|
||
ip_arr[0] = (uint8_t)(ip);
|
||
ip_arr[1] = (uint8_t)(ip >> 8);
|
||
ip_arr[2] = (uint8_t)(ip >> 16);
|
||
ip_arr[3] = (uint8_t)(ip >> 24);
|
||
|
||
ch395f_set_des_ip(sockfd, ip_arr);
|
||
ch395f_set_des_port(sockfd, net_ntohs(addr_in->sin_port));
|
||
}
|
||
|
||
tick_start = HAL_GetTick();
|
||
|
||
/* 发送数据 */
|
||
while (sent < len)
|
||
{
|
||
int chunk = len - sent;
|
||
if (chunk > NET_SEND_BUF_SIZE)
|
||
{
|
||
chunk = NET_SEND_BUF_SIZE;
|
||
}
|
||
|
||
/* 检查发送缓冲区 */
|
||
if (!sock->send_ready)
|
||
{
|
||
if (NET_SEND_TIMEOUT_MS > 0 &&
|
||
(HAL_GetTick() - tick_start) >= NET_SEND_TIMEOUT_MS)
|
||
{
|
||
s_net_errno = NET_ERR_TIMEDOUT;
|
||
break;
|
||
}
|
||
net_poll();
|
||
continue;
|
||
}
|
||
|
||
ch395f_write_send_buf(sockfd, (uint8_t *)buf + sent, (uint16_t)chunk);
|
||
sock->send_ready = 0;
|
||
sent += chunk;
|
||
sock->send_bytes += (uint32_t)chunk;
|
||
|
||
/* 等待发送完成 */
|
||
tick_start = HAL_GetTick();
|
||
while (!sock->send_ready)
|
||
{
|
||
net_poll();
|
||
if (NET_SEND_TIMEOUT_MS > 0 &&
|
||
(HAL_GetTick() - tick_start) >= NET_SEND_TIMEOUT_MS)
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return sent;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：接收 UDP 数据
|
||
*/
|
||
int net_recvfrom(int sockfd, void *buf, int len, int flags,
|
||
struct net_sockaddr *src_addr, int *addrlen)
|
||
{
|
||
net_sock_t *sock;
|
||
uint16_t recv_len;
|
||
uint32_t tick_start;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
if (buf == NULL || len <= 0)
|
||
{
|
||
s_net_errno = NET_ERR_INVAL;
|
||
return -1;
|
||
}
|
||
|
||
tick_start = HAL_GetTick();
|
||
|
||
while (1)
|
||
{
|
||
net_poll();
|
||
|
||
recv_len = ch395f_get_recv_len(sockfd);
|
||
if (recv_len > 0)
|
||
{
|
||
/* UDP Server 模式：前 8 字节为固定格式（IP + 端口 + 长度） */
|
||
if (sock->type == NET_SOCK_DGRAM && recv_len >= 8)
|
||
{
|
||
uint8_t header[8];
|
||
ch395f_read_recv_buf(sockfd, header, 8);
|
||
recv_len -= 8;
|
||
|
||
/* 填充来源地址 */
|
||
if (src_addr != NULL && addrlen != NULL &&
|
||
*addrlen >= (int)sizeof(struct net_sockaddr_in))
|
||
{
|
||
struct net_sockaddr_in *addr_in = (struct net_sockaddr_in *)src_addr;
|
||
addr_in->sin_family = NET_AF_INET;
|
||
addr_in->sin_port = net_htons((uint16_t)(header[4] | (header[5] << 8)));
|
||
addr_in->sin_addr.s_addr = ((uint32_t)header[0]) |
|
||
((uint32_t)header[1] << 8) |
|
||
((uint32_t)header[2] << 16) |
|
||
((uint32_t)header[3] << 24);
|
||
*addrlen = sizeof(struct net_sockaddr_in);
|
||
}
|
||
}
|
||
|
||
/* 读取数据 */
|
||
if (recv_len > 0)
|
||
{
|
||
int read_len = (recv_len > (uint16_t)len) ? len : (int)recv_len;
|
||
ch395f_read_recv_buf(sockfd, (uint8_t *)buf, (uint16_t)read_len);
|
||
sock->recv_bytes += (uint32_t)read_len;
|
||
return read_len;
|
||
}
|
||
}
|
||
|
||
/* 非阻塞模式检查 */
|
||
if (flags & NET_MSG_DONTWAIT)
|
||
{
|
||
s_net_errno = NET_ERR_WOULDBLOCK;
|
||
return -1;
|
||
}
|
||
|
||
/* 超时检查 */
|
||
if (NET_RECV_TIMEOUT_MS > 0 &&
|
||
(HAL_GetTick() - tick_start) >= NET_RECV_TIMEOUT_MS)
|
||
{
|
||
s_net_errno = NET_ERR_TIMEDOUT;
|
||
return -1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：关闭 socket
|
||
*/
|
||
int net_close(int sockfd)
|
||
{
|
||
net_sock_t *sock;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
/* 关闭 CH395F Socket */
|
||
ch395f_close_socket(sockfd);
|
||
|
||
/* 清零控制块 */
|
||
memset(sock, 0, sizeof(net_sock_t));
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：注册事件回调
|
||
*/
|
||
int net_set_event_cb(int sockfd, net_event_cb_t cb, void *arg)
|
||
{
|
||
net_sock_t *sock;
|
||
|
||
/* 参数检查 */
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock = &g_net_socks[sockfd];
|
||
if (!sock->in_use)
|
||
{
|
||
s_net_errno = NET_ERR_BADF;
|
||
return -1;
|
||
}
|
||
|
||
sock->event_cb = cb;
|
||
sock->event_arg = arg;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：获取 socket 最后错误码
|
||
*/
|
||
int net_get_errno(void)
|
||
{
|
||
return s_net_errno;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：将 IP 地址字符串转为网络字节序
|
||
*/
|
||
uint32_t net_inet_addr(const char *cp)
|
||
{
|
||
uint32_t addr = 0;
|
||
uint32_t val;
|
||
int i;
|
||
|
||
if (cp == NULL)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
val = 0;
|
||
while (*cp >= '0' && *cp <= '9')
|
||
{
|
||
val = val * 10 + (*cp - '0');
|
||
cp++;
|
||
}
|
||
addr |= (val << (i * 8));
|
||
if (*cp == '.')
|
||
{
|
||
cp++;
|
||
}
|
||
}
|
||
|
||
return NET_htonl(addr);
|
||
}
|
||
|
||
/*
|
||
* 函数功能：将网络字节序 IP 转为字符串
|
||
*/
|
||
char *net_inet_ntoa(uint32_t addr, char *buf)
|
||
{
|
||
uint32_t naddr = NET_ntohl(addr);
|
||
|
||
if (buf == NULL)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
sprintf(buf, "%lu.%lu.%lu.%lu",
|
||
(unsigned long)(naddr & 0xFF),
|
||
(unsigned long)((naddr >> 8) & 0xFF),
|
||
(unsigned long)((naddr >> 16) & 0xFF),
|
||
(unsigned long)((naddr >> 24) & 0xFF));
|
||
|
||
return buf;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：端口字节序转换（主机序 -> 网络序）
|
||
*/
|
||
uint16_t net_htons(uint16_t hostshort)
|
||
{
|
||
return NET_htons(hostshort);
|
||
}
|
||
|
||
/*
|
||
* 函数功能：端口字节序转换（网络序 -> 主机序）
|
||
*/
|
||
uint16_t net_ntohs(uint16_t netshort)
|
||
{
|
||
return NET_ntohs(netshort);
|
||
}
|
||
|
||
/*
|
||
* 函数功能：IP 地址字节序转换（主机序 -> 网络序）
|
||
*/
|
||
uint32_t net_htonl(uint32_t hostlong)
|
||
{
|
||
return NET_htonl(hostlong);
|
||
}
|
||
|
||
/*
|
||
* 函数功能：IP 地址字节序转换（网络序 -> 主机序）
|
||
*/
|
||
uint32_t net_ntohl(uint32_t netlong)
|
||
{
|
||
return NET_ntohl(netlong);
|
||
}
|
||
|
||
/*
|
||
* 私有函数实现区
|
||
*/
|
||
|
||
/*
|
||
* 函数功能：分配空闲 Socket
|
||
* 返回值：Socket 索引，失败返回 -1
|
||
*/
|
||
static int alloc_socket(void)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < NET_MAX_SOCKETS; i++)
|
||
{
|
||
if (!g_net_socks[i].in_use)
|
||
{
|
||
return i;
|
||
}
|
||
}
|
||
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
* 函数功能：处理连接事件
|
||
*/
|
||
static void handle_connect_event(net_sock_t *sock)
|
||
{
|
||
if (sock->state == NET_SOCK_STATE_LISTENING)
|
||
{
|
||
/* 多连接模式：监听 Socket 收到 CONNECT 中断 = 有新连接被分配到数据 Socket
|
||
* Socket 0 自身保持 LISTENING，不需要改变状态 */
|
||
fire_event(sock, NET_EVENT_CONNECTED);
|
||
}
|
||
else if (!sock->in_use)
|
||
{
|
||
/* CH395F 自动打开的数据 Socket（多连接模式），首次收到 CONNECT 中断 */
|
||
int sock_idx = (int)(sock - g_net_socks);
|
||
sock->ch395_sock = (uint8_t)sock_idx;
|
||
DBG_INFO("sock%d AUTO-OPENED, CONNECTED", sock->ch395_sock);
|
||
uint8_t remote[6];
|
||
ch395f_get_remot_ipp(sock->ch395_sock, remote);
|
||
memcpy(sock->remote_ip_arr, remote, 4);
|
||
sock->remote_ip = ((uint32_t)remote[0]) |
|
||
((uint32_t)remote[1] << 8) |
|
||
((uint32_t)remote[2] << 16) |
|
||
((uint32_t)remote[3] << 24);
|
||
sock->remote_port = (uint16_t)(remote[4] | (remote[5] << 8));
|
||
sock->in_use = 1;
|
||
sock->state = NET_SOCK_STATE_ESTABLISHED;
|
||
sock->send_ready = 1;
|
||
|
||
ch395f_set_keepalive_enable(sock->ch395_sock, 1);
|
||
|
||
fire_event(sock, NET_EVENT_CONNECTED);
|
||
}
|
||
else if (sock->state == NET_SOCK_STATE_CONNECTING)
|
||
{
|
||
/* TCP Client 连接成功 */
|
||
uint8_t remote[6];
|
||
ch395f_get_remot_ipp(sock->ch395_sock, remote);
|
||
memcpy(sock->remote_ip_arr, remote, 4);
|
||
sock->remote_ip = ((uint32_t)remote[0]) |
|
||
((uint32_t)remote[1] << 8) |
|
||
((uint32_t)remote[2] << 16) |
|
||
((uint32_t)remote[3] << 24);
|
||
sock->remote_port = (uint16_t)(remote[4] | (remote[5] << 8));
|
||
sock->state = NET_SOCK_STATE_ESTABLISHED;
|
||
|
||
ch395f_set_keepalive_enable(sock->ch395_sock, 1);
|
||
|
||
fire_event(sock, NET_EVENT_CONNECTED);
|
||
}
|
||
else if (sock->state == NET_SOCK_STATE_TCP_ACCEPT)
|
||
{
|
||
/* 数据 Socket 被分配了连接 */
|
||
DBG_INFO("data sock%d TCP_ACCEPT -> CONNECTED", sock->ch395_sock);
|
||
uint8_t remote[6];
|
||
ch395f_get_remot_ipp(sock->ch395_sock, remote);
|
||
memcpy(sock->remote_ip_arr, remote, 4);
|
||
sock->remote_ip = ((uint32_t)remote[0]) |
|
||
((uint32_t)remote[1] << 8) |
|
||
((uint32_t)remote[2] << 16) |
|
||
((uint32_t)remote[3] << 24);
|
||
sock->remote_port = (uint16_t)(remote[4] | (remote[5] << 8));
|
||
sock->state = NET_SOCK_STATE_ESTABLISHED;
|
||
|
||
ch395f_set_keepalive_enable(sock->ch395_sock, 1);
|
||
|
||
fire_event(sock, NET_EVENT_CONNECTED);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：处理断开事件
|
||
* 函数说明：CH395F 在 DISCONNECT 中断后自动关闭 Socket（默认 FUN_PARA_FLAG_SOCKET_CLOSE=0），
|
||
* 必须重新 OPEN_SOCKET + TCP_LISTEN 才能接受新连接
|
||
*/
|
||
static void handle_disconnect_event(net_sock_t *sock)
|
||
{
|
||
if (sock->state == NET_SOCK_STATE_LISTENING)
|
||
{
|
||
DBG_ERROR("WARNING: listen sock%d got disconnect", sock->ch395_sock);
|
||
}
|
||
else if (sock->state == NET_SOCK_STATE_ESTABLISHED)
|
||
{
|
||
/* CH395F 自动关闭了 Socket，恢复为未使用状态 */
|
||
DBG_INFO("sock%d DISCONNECTED, back to idle", sock->ch395_sock);
|
||
memset(sock->remote_ip_arr, 0, 4);
|
||
sock->remote_port = 0;
|
||
sock->send_ready = 1;
|
||
sock->in_use = 0;
|
||
sock->state = NET_SOCK_STATE_CREATED;
|
||
fire_event(sock, NET_EVENT_DISCONNECTED);
|
||
}
|
||
else
|
||
{
|
||
/* 未预期的断开 */
|
||
DBG_ERROR("sock%d disconnect in state %d", sock->ch395_sock, sock->state);
|
||
fire_event(sock, NET_EVENT_DISCONNECTED);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：处理数据接收事件
|
||
*/
|
||
static void handle_recv_event(net_sock_t *sock)
|
||
{
|
||
uint16_t recv_len = ch395f_get_recv_len(sock->ch395_sock);
|
||
|
||
if (recv_len > 0)
|
||
{
|
||
fire_event(sock, NET_EVENT_DATA_RECEIVED);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：处理发送完成事件
|
||
*/
|
||
static void handle_send_event(net_sock_t *sock)
|
||
{
|
||
fire_event(sock, NET_EVENT_SEND_COMPLETE);
|
||
}
|
||
|
||
/*
|
||
* 函数功能：处理超时事件
|
||
* 函数说明：CH395F 在 TIMEOUT 中断后同样自动关闭 Socket，
|
||
* 需要重新打开并恢复监听
|
||
*/
|
||
static void handle_timeout_event(net_sock_t *sock)
|
||
{
|
||
if (sock->state == NET_SOCK_STATE_CONNECTING)
|
||
{
|
||
/* TCP Client 连接超时 */
|
||
DBG_ERROR("sock%d CONNECT TIMEOUT", sock->ch395_sock);
|
||
sock->state = NET_SOCK_STATE_CREATED;
|
||
}
|
||
else if (sock->state == NET_SOCK_STATE_ESTABLISHED)
|
||
{
|
||
/* 多连接模式：数据 Socket 超时，恢复为 TCP_ACCEPT 等待新连接 */
|
||
DBG_INFO("sock%d TIMEOUT, back to ACCEPT", sock->ch395_sock);
|
||
memset(sock->remote_ip_arr, 0, 4);
|
||
sock->remote_port = 0;
|
||
sock->send_ready = 1;
|
||
sock->state = NET_SOCK_STATE_TCP_ACCEPT;
|
||
}
|
||
else if (sock->state == NET_SOCK_STATE_LISTENING)
|
||
{
|
||
/* 监听超时（异常情况） */
|
||
DBG_ERROR("sock%d LISTEN TIMEOUT", sock->ch395_sock);
|
||
}
|
||
|
||
fire_event(sock, NET_EVENT_TIMEOUT);
|
||
}
|
||
|
||
/*
|
||
* 函数功能：触发事件回调
|
||
*/
|
||
static void fire_event(net_sock_t *sock, net_event_t event)
|
||
{
|
||
if (sock->event_cb != NULL)
|
||
{
|
||
sock->event_cb(sock->ch395_sock, event, sock->event_arg);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：解析 IP 地址字符串为数组
|
||
*/
|
||
static void parse_ip_string(const char *str, uint8_t *ip_arr)
|
||
{
|
||
uint32_t val;
|
||
int i;
|
||
|
||
if (str == NULL || ip_arr == NULL)
|
||
{
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < 4; i++)
|
||
{
|
||
val = 0;
|
||
while (*str >= '0' && *str <= '9')
|
||
{
|
||
val = val * 10 + (*str - '0');
|
||
str++;
|
||
}
|
||
ip_arr[i] = (uint8_t)val;
|
||
if (*str == '.')
|
||
{
|
||
str++;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 函数功能：获取 Socket 控制块指针（内部使用）
|
||
*/
|
||
net_sock_t *net_get_sock(int sockfd)
|
||
{
|
||
if (sockfd < 0 || sockfd >= NET_MAX_SOCKETS)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
if (!g_net_socks[sockfd].in_use)
|
||
{
|
||
return NULL;
|
||
}
|
||
|
||
return &g_net_socks[sockfd];
|
||
}
|