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file_server.c
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// 基于 tcp 半关闭的文件传输服务端
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <errno.h>
#include <sys/socket.h>
#include <unistd.h>
#include "error_handling.h"
#define BUF_SIZE 100
int main(int argc, char *argv[])
{
struct sockaddr_in serv_addr, clnt_addr;
// 监听 socket、连接 socket
int serv_sock, clnt_sock;
socklen_t socklen;
char content[BUF_SIZE];
int read_cnt;
FILE *fp;
if (argc != 2)
{
printf("Usage: %s <port>\n", argv[0]);
exit(1);
}
serv_sock = socket(PF_INET, SOCK_STREAM, 0);
if (serv_sock == -1)
{
error_handling("socket() error: %s", strerror(errno));
}
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_port = htons(atoi(argv[1]));
if (bind(serv_sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) == -1)
{
error_handling("bind() error: %s", strerror(errno));
}
if (listen(serv_sock, 512) == -1)
{
error_handling("listen() error: %s", strerror(errno));
}
fp = fopen("./bin/udp_echo_client", "rb");
socklen = sizeof(clnt_addr);
clnt_sock = accept(serv_sock, (struct sockaddr *)&clnt_addr, &socklen);
if (clnt_sock == -1)
{
error_handling("accept() error: %s", strerror(errno));
}
while (1)
{
read_cnt = fread(content, 1, BUF_SIZE, fp);
if (read_cnt < BUF_SIZE)
{
write(clnt_sock, content, read_cnt);
break;
}
write(clnt_sock, content, BUF_SIZE);
}
// 关闭输出流,向客户端发送EOF,通知到文件传输完成
if (shutdown(clnt_sock, SHUT_WR) == -1)
{
error_handling("shutdown() error: %s", strerror(errno));
}
read(clnt_sock, content, BUF_SIZE);
printf("receive client message: %s\n", content);
fclose(fp);
close(clnt_sock);
close(serv_sock);
return 0;
}