-1
我試圖修改下面的代碼,這是一個簡單的多線程套接字服務器,如果客戶端發出QUIT命令,那麼它實際上會關閉連接。套接字服務器關閉連接命令
/*
C socket server example, handles multiple clients using threads
*/
#include<stdio.h>
#include<string.h> //strlen
#include<stdlib.h> //strlen
#include<sys/socket.h>
#include<arpa/inet.h> //inet_addr
#include<unistd.h> //write
#include<pthread.h> //for threading , link with lpthread
//the thread function
void *connection_handler(void *);
int main(int argc , char *argv[])
{
int socket_desc , client_sock , c , *new_sock;
struct sockaddr_in server , client;
//Create socket
socket_desc = socket(AF_INET , SOCK_STREAM , 0);
if (socket_desc == -1)
{
printf("Could not create socket");
}
puts("Socket created");
//Prepare the sockaddr_in structure
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons(8888);
//Bind
if(bind(socket_desc,(struct sockaddr *)&server , sizeof(server)) < 0)
{
//print the error message
perror("bind failed. Error");
return 1;
}
puts("bind done");
//Listen
listen(socket_desc , 3);
//Accept and incoming connection
puts("Waiting for incoming connections...");
c = sizeof(struct sockaddr_in);
//Accept and incoming connection
puts("Waiting for incoming connections...");
c = sizeof(struct sockaddr_in);
while((client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c)))
{
puts("Connection accepted");
pthread_t sniffer_thread;
new_sock = malloc(1);
*new_sock = client_sock;
if(pthread_create(&sniffer_thread , NULL , connection_handler , (void*) new_sock) < 0)
{
perror("could not create thread");
return 1;
}
//Now join the thread , so that we dont terminate before the thread
//pthread_join(sniffer_thread , NULL);
puts("Handler assigned");
}
if (client_sock < 0)
{
perror("accept failed");
return 1;
}
return 0;
}
/*
* This will handle connection for each client
* */
void *connection_handler(void *socket_desc)
{
//Get the socket descriptor
int sock = *(int*)socket_desc;
int read_size;
char *message , client_message[2000];
//Send some messages to the client
message = "Greetings! I am your connection handler\n";
write(sock , message , strlen(message));
message = "Now type something and i shall repeat what you type \n";
write(sock , message , strlen(message));
//Receive a message from client
while((read_size = recv(sock , client_message , 2000 , 0)) > 0)
{
//Send the message back to client
write(sock , client_message , strlen(client_message));
}
if(read_size == 0)
{
puts("Client disconnected");
fflush(stdout);
}
else if(read_size == -1)
{
perror("recv failed");
}
//Free the socket pointer
free(socket_desc);
return 0;
}
我所做的是插入一個闖入while循環連接處理程序的線程(工作),那麼
免費(socket_desc)之前;我添加了 close(socket_desc); 以及關閉連接。這會產生一個編譯器錯誤,並且服務器到達這一點時會崩潰。
com.c:在函數 'connection_handler':com.c:134:5:警告:傳遞 說法1 '關閉' 時將指針整數,未作鑄造 [默認啓用]
我沒有看到休息。顯示你的真實代碼,而不是一個例子。 – deviantfan
無論socket_desc是什麼,對free()和close()都不是不合法的參數。那麼,它是一個'int'文件描述符,還是指向某些信息結構的指針?和-1發佈一堆代碼,其中不包括導致您所詢問的編譯警告的行。 –