我在具有相同IP地址但具有不同端口的客户端和服务器的同一台计算机上以C语言实现多线程客户端 - 服务器套接字编程。我已经在C环境中使用pthread概念实现了它。但是我可以看到只有我的客户端线程正在运行,而我的服务器线程一旦到达'accept()'例程就停止了。 我想知道可能是什么问题。如果有任何人能找出我犯了一个错误那么这将是非常有益的C中的多线程客户端 - 服务器套接字编程
我的客户端代码如下所示:
void *client_connect(void *arg)
{
int client_socket;
struct sockaddr_in Serv_Addr;
struct sockaddr_in Client_Addr;
int addrlen=sizeof(Client_Addr);
char send_buffer_client[] = {"server message"};
char recv_buffer_client[1024];
int nbytes;
client_socket = lwip_socket(AF_INET, SOCK_STREAM, 0);
if (client_socket < 0) ;
memset((char *)&Serv_Addr, 0, sizeof(Serv_Addr));
Serv_Addr.sin_family = AF_INET;
Serv_Addr.sin_len = sizeof(Serv_Addr);
Serv_Addr.sin_addr.s_addr = inet_addr("1.2.3.4");
Serv_Addr.sin_port = 9999;
memset((char *)&Client_Addr, 0, sizeof(Client_Addr));
Client_Addr.sin_family = AF_INET;
Client_Addr.sin_len = sizeof(Client_Addr);
Client_Addr.sin_addr.s_addr = inet_addr("1.2.3.4");
Client_Addr.sin_port = 5555;
lwip_connect(client_socket, (struct sockaddr *)&Serv_Addr, sizeof(Serv_Addr));
while (1) {
do{
nbytes = lwip_recv(client_socket, recv_buffer_client, sizeof(recv_buffer_client),0);
if (nbytes>0) lwip_send(client_socket, send_buffer_client, sizeof(send_buffer_client), 0);
printf("server message = %s\n", recv_buffer_client);
} while (nbytes>0);
sleep(10);
}
lwip_close(client_socket);
}
我的服务器代码:
void *server_connect(void *arg)
{
int server_socket;
struct sockaddr_in Serv_Addr;
struct sockaddr_in Client_Addr;
int addrlen=sizeof(Client_Addr);
int clientfd;
char send_buffer[] = {"Server message"};
char recv_buffer[1024];
int nbytes_server, client_length;
server_socket = lwip_socket(AF_INET, SOCK_STREAM, 0);
if (server_socket < 0)
printf("could not create server socket");
else
printf("created SERVER socket");
memset((char *)&Serv_Addr, 0, sizeof(Serv_Addr));
Serv_Addr.sin_family = AF_INET;
Serv_Addr.sin_len = sizeof(Serv_Addr);
Serv_Addr.sin_addr.s_addr = inet_addr("1.2.3.4");
Serv_Addr.sin_port = 9999;
client_length = sizeof(Client_Addr);
if (lwip_bind(server_socket, (struct sockaddr *)&Serv_Addr, sizeof(Serv_Addr)) < 0) {
printf("could not BIND");
}
if (lwip_listen(server_socket, 20) != 0){
printf("could not BIND");
}
while (1) {
lwip_accept(server_socket, (struct sockaddr*)&Client_Addr, &client_length);
do{
nbytes_server = lwip_recv(server_socket, recv_buffer, sizeof(recv_buffer),0);
if (nbytes_server>0){lwip_send(server_socket, send_buffer, sizeof(send_buffer), 0);}
printf("client message = %s\n", recv_buffer);
}while(nbytes_server>0);
sleepms(10);
}
lwip_close(server_socket);
}
void main(void)
{
pthread_t client_thread;
pthread_t server_thread;
pthread_create(&server_thread, NULL, server_connect, NULL);
pthread_create(&client_thread, NULL, client_connect, NULL);
while(1){
sleepms(1);
}
}
请让我知道如果我做了错误的方式
问候 德布
你需要尝试重新格式化您的代码,它可能给线索。同样在客户端,如果(client_socket <0);看起来不正确。 – ColWhi 2011-05-04 14:44:31
首先,我会添加“\ n”并在printf失败后退出/返回;代码在错误之后仍然继续。接下来,跳过创建线程,并直接调用server_connect。然后尝试通过telnet连接,看看你是否连接。 – 2011-05-04 15:02:20