MT7628学习笔记（19）——TCP客户端ipk软件包编写与应用

基础步骤参考：ipk软件包编写与应用 

一、编写驱动

 src/net_control_client.c

#include <stdio.h>
#include <stdlib.h>	
#include <unistd.h>	//系统函数
#include <string.h>
#include <pthread.h>	//多线程库

#include "net_control_client.h"

ts_tcp_client s_tcp_client;


static int connect_to_server(void)
{
	while(connect(s_tcp_client.socket_fd, (struct sockaddr *) &(s_tcp_client.server_socket_addr),
			sizeof(struct sockaddr)) != 0){
		//if connect error reconnect after 5 seconds
		perror("connect");
		printf("***reconnect after 5s***\n");
		sleep(5);
		printf("***reconnect...***\n");
	}
	printf("***connected***\n");
#if 1//test message send
	char test_msg[] = "This is from client";
	send(s_tcp_client.socket_fd, test_msg ,sizeof(test_msg),0);
#endif
	return 0;
}

/*
 * 接收socket数据函数.
 * client_fd - 客户端连接的socket。
 */
static int receive_packet(int client_fd)
{
	unsigned char 	buf[TCP_BUFFER_SIZE];
	int		recvbytes;
	while(1){
		/*接收*/
		bzero(buf,sizeof(buf));

		recvbytes = recv(client_fd,buf,TCP_BUFFER_SIZE,0);
		printf("Receive %d bytes\n",recvbytes);

		if (recvbytes <= 0){//receive error or disconnected
			perror("recv");
			/*reconnect to server*/
//			printf("close socket id = %d\n", s_tcp_client.socket_fd);
			close(s_tcp_client.socket_fd);	//关闭通道
			s_tcp_client.socket_fd = socket(AF_INET, SOCK_STREAM, 0);
			if (s_tcp_client.socket_fd == -1){
				perror("socket");
				return -1;
			}
//			printf("new socket id = %d\n", s_tcp_client.socket_fd);
			if (connect_to_server() != 0){
				printf("###connect_to_server error###\n");
				return -1;
			}
		}else{//receive success
#if 1//test
			int i;
			printf("***GET:\n");
			for (i = 0; i < recvbytes; i++){
				printf("0x%02X  %c\n", *(buf+i), *(buf+i));
			}
#endif
		}
	}
	return 0;
}

/*tcp clinet running function*/
int tcp_client_start(void)
{
	printf("***connect to %s.....***\n", s_tcp_client.server_ip);
	/*connect to server*/
	if (connect_to_server() != 0){
		printf("###connect_to_server error###\n");
		return -1;
	}
	receive_packet(s_tcp_client.socket_fd);
	return 0;
}

/*
 * tcp_client initialize function
 * port_num -  TCP server port number
 * server_ip - TCP server ip
 * */
int tcp_client_init(unsigned short port_num, char *server_ip)
{
	int res;
	struct in_addr test_addr;
	/*initialize variable*/
	if (port_num > 0){
		s_tcp_client.server_port = port_num;
	}else{
		printf("###invalid tcp server port:%d###\n", port_num);
		return -1;
	}

	if (server_ip == NULL){
		printf("###server_ip cannot be NULL###\n");
		return -1;
	}else{
		strcpy(s_tcp_client.server_ip, server_ip);//record ip
	}

	/*建立socket描述符*/
	if ((s_tcp_client.socket_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
		perror("socket");
		return -1;
	}
	printf("socket id = %d\n", s_tcp_client.socket_fd);

	/*
	 * 填充服务器sockaddr结构
	 */
	bzero(&(s_tcp_client.server_socket_addr), sizeof(struct sockaddr_in));	//memset
	s_tcp_client.server_socket_addr.sin_family		 	= AF_INET;
	inet_pton(AF_INET, s_tcp_client.server_ip, &(s_tcp_client.server_socket_addr.sin_addr.s_addr));	//把ip地址转化为用于网络传输的二进制数值
	s_tcp_client.server_socket_addr.sin_port				= htons(s_tcp_client.server_port);	//将主机字节顺序转为网络字节顺序
	bzero(&(s_tcp_client.server_socket_addr.sin_zero), 8);

	return 0;
}

int main(int argc, char *argv[])
{
	int i = 0;
	int res;
	pthread_t 	tcp_thread_id;//返回的线程值
	char tcp_server_port[256];
	char tcp_server_ip[256];

	if (argc >= 2){
		if (strcmp(argv[1],"-v") == 0){
			printf("net_control_client v1.0\n");
			return 0;
		}else if (strcmp(argv[1],"-h") == 0){
			printf("-v for version\n");
			printf("-h for help\n");
			printf("tcp_connect <IP> <port>\n");
			return 0;
		}else if (strcmp(argv[1], "tcp_connect") == 0){
			/*tcp demo*/
			strcpy(tcp_server_ip, argv[2]);
			strcpy(tcp_server_port, argv[3]);

			/*initialize functions*/
			res = tcp_client_init((unsigned short)atoi(tcp_server_port), tcp_server_ip);//set tcp clinet setting
			if (res == -1){
				printf("###tcp_server_init error###\n");
				return -1;
			}

			//create thread for TCP communication
			pthread_create(&tcp_thread_id, NULL, (void *)tcp_client_start, NULL);
		}else{
			printf("Unknown argument %s\n",argv[1]);
			return -1;
		}
	}
	while(1){
		if (i < 100){
			i++;
		}else{
			i = 0;
		}
		sleep(1);
	}
	exit(0);
}

 src/net_control_client.h

#ifndef NET_CONTROL_CLINET_H_
#define NET_CONTROL_CLINET_H_

#include <arpa/inet.h>

#define TCP_BUFFER_SIZE	1024//max buff of receive buffer for tcp

typedef struct{//tcp client class
		unsigned short  	server_port;
		char 				server_ip[64];
		int 				socket_fd;//socket
		struct 				sockaddr_in server_socket_addr;
}ts_tcp_client;



#endif /* NET_CONTROL_CLINET_H_ */

src/Makefile

all:net_control_client

OBJS = net_control_client.o

net_control_client:$(OBJS)
	$(CC) $(CFLAGS) -o [e-mail] $(OBJS) -lpthread

clean:
	rm -f net_control_client *.o

Makefile

include $(TOPDIR)/rules.mk#将openwrt顶层目录下的rules.mk文件中的内容导入进来

PKG_NAME:=net_control_client#软件包名
PKG_VERSION:=1.0#软件包版本
PKG_BUILD_DIR:= $(BUILD_DIR)/$(PKG_NAME)#真正编译当前软件包的目录


include $(INCLUDE_DIR)/package.mk#将$(TOPDIR)/include目录下的package.mk文件中的内容导入进来

define Package/net_control_client
	SECTION:=wrtnode#软件包类型
	CATEGORY:=WRTnode#menuconfig中软件包所属的一级目录
	SUBMENU :=demos#menuconfig中软件包所属的二级目录
	TITLE:=net control client -a TCP client#软件包标题
	DEPENDS:=+libpthread#运行本软件依赖的其他包
endef

define Package/net_control_client/description	#软件包描述
	A sample socket net control client
endef

define Build/Prepare	#编译之前的准备动作
	mkdir -p $(PKG_BUILD_DIR)
	$(CP) ./src/* $(PKG_BUILD_DIR)/
endef


define Package/net_control_client/install	#软件包的安装方法，主要就是将一系列编译好的文件、启动脚本、UCI配置文件等拷贝到指定位置
	$(INSTALL_DIR) $(1)/bin
	$(INSTALL_BIN) $(PKG_BUILD_DIR)/net_control_client $(1)/bin/
endef

$(eval $(call BuildPackage,net_control_client))

 

二、选中软件包

 

三、编译软件包

1、进入 OpenWrt 顶层目录，使用以下命令单独编译软件包：

make package/net_control_client/compile V=s

 

四、软件包发送到开发板并安装：

scp ~/linux/MTK/MT7628/SDK/openwrt-hiwooya/bin/ramips/packages/base/net_control_client_1.0_ramips_24kec.ipk [e-mail]:/tmp

opkg install net_control_client_1.0_ramips_24kec.ipk

 

 

五、测试运行软件包

1、连接本地服务器测试：：

net_control_client tcp_connect 172.16.2.44 7777

 

 

2、连接外网服务器测试：

测试服务器地址：http://tcplab.openluat.com/