TCP C客户端不发送，但telnet到服务器

Question

我已经做了一个简单的服务器，将消息一起收到消息时，将打印到终端。当我telnet并发送消息到服务器时，我发送的客户端只是发送消息（不会收到），它工作的很好，并且打印出我发送的内容。但是，当我编写在其下面找到的C客户端代码时，就好像没有发送任何内容。

这里是我的编译输出下面的代码-wall -Wextra -pedantic

./client.c: In function ‘main’: 
./client.c:17:4: warning: implicit declaration of function ‘bzero’ [-Wimplicit-function-declaration] 
./client.c:19:4: warning: implicit declaration of function ‘inet_addr’ [-Wimplicit-function-declaration] 
./client.c:28:2: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] 
./client.c:28:41: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] 
./client.c:22:8: warning: unused variable ‘val’ [-Wunused-variable] 
./client.c:10:15: warning: unused variable ‘n’ [-Wunused-variable] 
./client.c:8:14: warning: unused parameter ‘argc’ [-Wunused-parameter] 
./client.c:8:26: warning: unused parameter ‘argv’ [-Wunused-parameter] 
[email protected]:/home/c_dev/p2pcrypt_server/v0.1.0/src/tool_tests/libev 

-

/* Sample TCP client */ 

#include <sys/socket.h> 
#include <netinet/in.h> 
#include <stdio.h> 

int main(int argc, char**argv) 
{ 
    int sockfd,n; 
    struct sockaddr_in servaddr; 
    char * sendline; 
    sendline = "hello"; 

    sockfd=socket(AF_INET,SOCK_STREAM,0); 

    bzero(&servaddr,sizeof(servaddr)); 
    servaddr.sin_family = AF_INET; 
    servaddr.sin_addr.s_addr=inet_addr("127.0.0.1"); 
    servaddr.sin_port=htons(8018); 

    int connect_status = connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)); 
    printf("%d\n", connect_status); 

    int send_status = send(sockfd,sendline,strlen(sendline),0); 
    printf("%d\n", send_status); 

    printf("END\n"); 
    return 0; 
} 

更新代码 连接返回 “0”（成功）和发送返回“ 5“（我认为这是多少成功的字符它发送）

Answer 1

这是成功的工作代码在我的结束似乎\ r \ n是需要和所有伟大的建议被指出的离子。谢谢配偶！

/* Sample TCP client */ 

#include <sys/socket.h> 
#include <netinet/in.h> 
#include <stdio.h> 

int main(int argc, char**argv) 
{ 
    int sockfd,n; 
    struct sockaddr_in servaddr; 
    char * sendline; 
    sendline = "hellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellohellolohellohellohellohellohellohellohellohellohellolohellohellohellohellohellohellohellohellohellolohellohellohellohellohellohellohellohellohellolo\r\n"; 

    sockfd=socket(AF_INET,SOCK_STREAM,0); 

    memset(&servaddr, 0, sizeof(servaddr)); 
    servaddr.sin_family = AF_INET; 
    servaddr.sin_addr.s_addr=inet_addr("127.0.0.1"); 
    servaddr.sin_port=htons(8018); 

    int connect_status = connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)); 
    printf("%d\n", connect_status); 

    int send_status = send(sockfd,sendline,strlen(sendline),0); 
    printf("%d\n", send_status); 

    printf("END\n"); 
    return 0; 
}