C基于客户端的通信实例

运行环境liunx

需求：客户端对服务器发送一个TCP连接，连接成功之后发送数据并接收返回数据

代码如下：

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

int main( int argc, char* argv[] ) {
    if( argc <=  )
    {
        printf( "usage: %s ip_address port_number\n", basename( argv[] ) );
        return ;
    }
    const char* ip = argv[];
    int port = atoi( argv[] );

    struct sockaddr_in server_address;
    bzero( &server_address, sizeof( server_address ) );
    server_address.sin_family = AF_INET;
    inet_pton( AF_INET, ip, &server_address.sin_addr );
    server_address.sin_port = htons( port );

    int sockfdclient = socket( PF_INET, SOCK_STREAM,  );
    assert( sockfdclient >=  );
    if ( connect( sockfdclient, ( struct sockaddr* )&server_address, sizeof( server_address ) ) <  )
    {
        printf( "connection failed\n" );
    exit(-);
    }

    while() {
        const char* normal_data = "";
        int iSend = send( sockfdclient, normal_data, strlen( normal_data ),  );
        if(iSend == -){
            printf("send failed");
        }  

        char buffer[];
        memset( buffer,'\0', );
        recv(sockfdclient, buffer, sizeof(buffer), );
        int count = atoi(buffer);
    printf("%d",count);

    if( count == )
        break;

    usleep();
    }
    close( sockfdclient);
    return ;
}

运行g++ -o a a.c