tcp实现图片传送c语言

TCP协议本身并不支持图像传输，但可以通过将图像数据拆分为较小的数据包并将其传输到接收方，然后在接收方重新组装图像数据。以下是一个简单的C语言TCP图像传输的示例代码：

发送方：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>

#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 8000
#define FILE_NAME "test.jpg"
#define BUFFER_SIZE 1024

int main()
{
    //创建socket
    int sockfd;
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        perror("socket");
        exit(1);
    }

    //设置服务器地址信息
    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(SERVER_PORT);
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);

    //建立连接
    if(connect(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
    {
        perror("connect");
        exit(1);
    }

    //打开要发送的文件
    int fd = open(FILE_NAME, O_RDONLY);
    if(fd < 0)
    {
        perror("open");
        exit(1);
    }

    //循环发送文件数据
    char buffer[BUFFER_SIZE];
    int len;
    while((len = read(fd, buffer, BUFFER_SIZE)) > 0)
    {
        if(send(sockfd, buffer, len, 0) < 0)
        {
            perror("send");
            exit(1);
        }
    }

    //关闭文件和socket
    close(fd);
    close(sockfd);

    return 0;
}

接收方：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>

#define SERVER_IP "127.0.0.1"
#define SERVER_PORT 8000
#define SAVE_FILE_NAME "recv.jpg"
#define BUFFER_SIZE 1024

int main()
{
    //创建socket
    int sockfd;
    if((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
    {
        perror("socket");
        exit(1);
    }

    //设置服务器地址信息
    struct sockaddr_in server_addr;
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(SERVER_PORT);
    server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);

    //绑定地址和端口号
    if(bind(sockfd, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0)
    {
        perror("bind");
        exit(1);
    }

    //监听连接
    if(listen(sockfd, 5) < 0)
    {
        perror("listen");
        exit(1);
    }

    //接收连接
    int clientfd;
    struct sockaddr_in client_addr;
    socklen_t addrlen = sizeof(client_addr);
    if((clientfd = accept(sockfd, (struct sockaddr *)&client_addr, &addrlen)) < 0)
    {
        perror("accept");
        exit(1);
    }

    //打开要保存的文件
    int fd = open(SAVE_FILE_NAME, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
    if(fd < 0)
    {
        perror("open");
        exit(1);
    }

    //循环接收文件数据
    char buffer[BUFFER_SIZE];
    int len;
    while((len = recv(clientfd, buffer, BUFFER_SIZE, 0)) > 0)
    {
        if(write(fd, buffer, len) < 0)
        {
            perror("write");
            exit(1);
        }
    }

    //关闭文件和socket
    close(fd);
    close(clientfd);
    close(sockfd);

    return 0;
}