Linux 下 简单客户端服务器通讯模型(TCP)

服务器端：server.c

#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<string.h>
#include<sys/socket.h>
#include<sys/types.h>
#include <stdio.h>
#include <unistd.h>
#include <netdb.h>
#include <netinet/in.h>

#define ServerPort 6080
#define MaxUser  8


typedef struct _server{
    
    int sock_fd;

    int new_fd;

    struct sockaddr_in my_addr;

} Server;

typedef struct _client{
    
    int sock_fd;
    
    struct sockaddr_in my_addr;

} Client;



static Server  *server;

static Client  *client;



void socket_server_init(Server * server){

    server -> my_addr.sin_family = AF_INET;
    
    server -> my_addr.sin_port = htons(ServerPort);
    
    server -> my_addr.sin_addr.s_addr = INADDR_ANY;
        
    bzero(&(server -> my_addr.sin_zero),8);

}

int socket_server_create_bind_listen(Server * server){

    int sin_size,ret, on;
    
    if((server -> sock_fd = socket(AF_INET,SOCK_STREAM,0)) == -1){
        
        perror("faild to create socket :\n");
    
        return -1;
    }
    on = 1;
    
    ret = setsockopt( server -> sock_fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on) );

    if(ret=bind(server -> sock_fd,
        (struct sockaddr *)&server -> my_addr,
        sizeof(struct sockaddr))==-1){
        
        perror("failed to bind \n");
        
        return -1;
    
    }
    if(listen(server -> sock_fd,MaxUser)==-1){
    
        perror("failed to listen \n");
    
        return -1;
    }
    
    return 1;
}

void server_send_msg(int fd){

    char buff[1024];

    while(1){

        fgets(buff,1024,stdin);

        if(send(fd,buff,1024,0)==-1){

            perror("error to send :");
            
            break;
        }

    }

}


void server_wait_service(Server *server,Client *client){

    int new_fd ,ret,sin_size;

    char buf[1024];

    pthread_t tid;

    sin_size = sizeof(client ->my_addr);

    new_fd = accept(server ->sock_fd,(struct sockaddr *)&client->my_addr,&sin_size);

    if(new_fd <= 0 ){
            
        perror("accept error :");
        
    }else{
    
        ret = pthread_create(&tid,NULL,server_send_msg,new_fd);

        if(ret!=0){

            perror("error to create pthread");

        }
        while(1){
            if(recv(new_fd,buf,sizeof(buf),0)>0){

                printf("\nclient said:\t\t%s\n",buf);

            }
        }
    }
}



int main(int arg, char * argv[]){
    
    server = (Server *)malloc(sizeof(Server));

    client = (Client *)malloc(sizeof(Client));

    socket_server_init(server);

    if(socket_server_create_bind_listen(server)){
    
        server_wait_service(server,client);
    
    }
    
    return 0;

}

客户端代码：client.c

#include<stdio.h>
#include<stdlib.h>
#include<errno.h>
#include<string.h>
#include<sys/socket.h>
#include<sys/types.h>
#include <stdio.h>
#include <netdb.h>


#define ServerPort 6080

typedef struct _server{
    
    int sock_fd;

    int new_fd;

    struct sockaddr_in my_addr;

} Server;

typedef struct _client{
    
    int sock_fd;
    
    struct sockaddr_in my_addr;

} Client;

Server *server;

Client *client;


void socket_server_init(Server * server){

    server -> my_addr.sin_family = AF_INET;
    
    server -> my_addr.sin_port = htons(ServerPort);
    
    server -> my_addr.sin_addr.s_addr = INADDR_ANY;
        
    bzero(&(server -> my_addr.sin_zero),8);

}

void socket_client_init(Client * client){

    client -> my_addr.sin_family = AF_INET;
    
    client -> my_addr.sin_port = htons(ServerPort+10);
    
    client -> my_addr.sin_addr.s_addr = INADDR_ANY;
        
    bzero(&(client -> my_addr.sin_zero),8);

}

int socket_client_create_connect(Server * server,Client * client){
    
    if((client -> sock_fd = socket(AF_INET,SOCK_STREAM,0)) == -1){
    
        perror("failed to create client socket \n");
        
        return -1;
    
    }
    
    else if(connect(client ->sock_fd,
        (struct sockaddr *)&server ->my_addr,
        sizeof(server ->my_addr))==-1){
        
        printf("failed to connect the server \n");
        
        return -1;
        
    }else

    return 1;

}

void client_recv_msg(Client *client){

    char buf[1024];

    while(1){

        if(recv(client->sock_fd,buf,sizeof(buf),0)>0){
                        
            printf("\nserver said :\t\t%s\n",buf);
            
        }else break;
    }

}


int main(int argc,char* argv[]){
    
    server = (Server *)malloc(sizeof(Server));
    
    client = (Client *)malloc(sizeof(Client));

    char data[1024];
    
    socket_server_init(server);
    
    socket_client_init(client);
    
    pthread_t tid;

    if(socket_client_create_connect(server,client)){

        pthread_create(&tid, NULL,client_recv_msg, client);

        while(1){
                
            fgets(data,1024,stdin);

            if(send(client->sock_fd,data,1024,0)==-1){

                perror("error to send :");

                break;
            }
        }
    }
    
    return 0;
}

Makefile: 

all:    server client

server:    server.c

    gcc -o server server.c -pthread

client:    client.c

    gcc -o client client.c -pthread

clean:
    rm -f server client

执行效果：

server:

root@ubuntu:/mnt/hgfs/E/Lessons/个人总结/chat# ./server

client said: hello

hehe

client said: g

client said: goodbay

client:

root@ubuntu:/mnt/hgfs/E/Lessons/个人总结/chat# ./client
hello

server said : hehe

s^Hg
goodbay

---

去年的代码，做个备份。