网络服务能力测试工具的详细设计与实现---多客户端并发访问服务器 C/C++
时间: 2023-09-14 07:07:10 浏览: 179
设计思路:
本文将介绍如何使用C/C++编写一个多客户端并发访问服务器的网络服务能力测试工具。该工具可以模拟多个客户端同时向服务器发送请求,测试服务器的并发处理能力。
1.服务器端:
(1)创建套接字
(2)绑定地址和端口
(3)监听连接
(4)接受连接请求
(5)创建子进程,子进程与客户端通信
(6)关闭套接字
2.客户端:
(1)创建套接字
(2)连接服务器
(3)发送请求
(4)接收响应
(5)关闭套接字
实现步骤:
1.服务器端:
(1)创建套接字:
使用socket函数创建套接字。代码如下:
```
int server_socket = socket(AF_INET, SOCK_STREAM, 0);
```
(2)绑定地址和端口:
使用bind函数将套接字与指定的地址和端口绑定。代码如下:
```
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
server_addr.sin_port = htons(PORT);
bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr));
```
(3)监听连接:
使用listen函数开始监听连接请求。代码如下:
```
listen(server_socket, 5);
```
(4)接受连接请求:
使用accept函数接受连接请求,并创建子进程处理连接。代码如下:
```
while(1) {
int client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &client_len);
if(fork() == 0) {
// 子进程处理连接
close(server_socket);
// ...
exit(0);
}
close(client_socket);
}
```
(5)创建子进程,子进程与客户端通信:
在子进程中,使用recv函数接收客户端发送的请求,使用send函数向客户端发送响应。代码如下:
```
while(1) {
char buffer[BUFFER_SIZE];
int len = recv(client_socket, buffer, BUFFER_SIZE, 0);
if(len == 0)
break;
// 处理请求
send(client_socket, response, strlen(response), 0);
}
```
(6)关闭套接字:
在服务器结束时,使用close函数关闭套接字。代码如下:
```
close(server_socket);
```
2.客户端:
(1)创建套接字:
使用socket函数创建套接字。代码如下:
```
int client_socket = socket(AF_INET, SOCK_STREAM, 0);
```
(2)连接服务器:
使用connect函数连接服务器。代码如下:
```
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
server_addr.sin_port = htons(PORT);
connect(client_socket, (struct sockaddr*)&server_addr, sizeof(server_addr));
```
(3)发送请求:
使用send函数向服务器发送请求。代码如下:
```
send(client_socket, request, strlen(request), 0);
```
(4)接收响应:
使用recv函数接收服务器的响应。代码如下:
```
char buffer[BUFFER_SIZE];
recv(client_socket, buffer, BUFFER_SIZE, 0);
```
(5)关闭套接字:
在客户端结束时,使用close函数关闭套接字。代码如下:
```
close(client_socket);
```
完整代码:
服务器端:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#define PORT 8080
#define BUFFER_SIZE 1024
int main() {
int server_socket = socket(AF_INET, SOCK_STREAM, 0);
if(server_socket == -1) {
perror("socket");
exit(1);
}
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
server_addr.sin_port = htons(PORT);
if(bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
perror("bind");
exit(1);
}
if(listen(server_socket, 5) == -1) {
perror("listen");
exit(1);
}
while(1) {
struct sockaddr_in client_addr;
socklen_t client_len = sizeof(client_addr);
int client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &client_len);
if(client_socket == -1) {
perror("accept");
exit(1);
}
if(fork() == 0) {
close(server_socket);
while(1) {
char buffer[BUFFER_SIZE];
int len = recv(client_socket, buffer, BUFFER_SIZE, 0);
if(len == 0)
break;
// 处理请求
char* response = "Hello, World!";
send(client_socket, response, strlen(response), 0);
}
close(client_socket);
exit(0);
}
close(client_socket);
}
close(server_socket);
return 0;
}
```
客户端:
```
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <arpa/inet.h>
#define SERVER_IP "127.0.0.1"
#define PORT 8080
#define BUFFER_SIZE 1024
int main() {
int client_socket = socket(AF_INET, SOCK_STREAM, 0);
if(client_socket == -1) {
perror("socket");
exit(1);
}
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = inet_addr(SERVER_IP);
server_addr.sin_port = htons(PORT);
if(connect(client_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
perror("connect");
exit(1);
}
char* request = "Hello!";
send(client_socket, request, strlen(request), 0);
char buffer[BUFFER_SIZE];
recv(client_socket, buffer, BUFFER_SIZE, 0);
printf("%s\n", buffer);
close(client_socket);
return 0;
}
```
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