Question

linux下socket 编程(客户端向服务器发送文件) 求源代码……大哥大姐帮帮忙!! 谢谢

Answer 1

我用BSD Socket发图片的，很简单。
推荐读物：
“BSD Sockets Programming from a Multi-Language Perspective”

void* streamServer(void* arg)
{
struct sockaddr_in server;

/* make this thread cancellable using pthread_cancel() */
pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

/* open socket */
if ((serversock = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
quit("socket() failed", 1);
}

/* setup server's IP and port */
memset(&server, 0, sizeof(server));
server.sin_family = AF_INET;
server.sin_port = htons(PORT);
server.sin_addr.s_addr = INADDR_ANY;

/* bind the socket */
if (bind(serversock, (const sockaddr*)&server, sizeof(server)) == -1) {
quit("bind() failed", 1);
}

/* wait for connection */
if (listen(serversock, 10) == -1) {
quit("listen() failed.", 1);
}

/* accept a client */
if ((clientsock = accept(serversock, NULL, NULL)) == -1) {
quit("accept() failed", 1);
}

/* the size of the data to be sent */
int imgsize = img1->imageSize;
int bytes, i;

/* start sending images */
while(1)
{
/* send the grayscaled frame, thread safe */
pthread_mutex_lock(&mutex);
if (is_data_ready) {
bytes = send(clientsock, img1->imageData, imgsize, 0);
is_data_ready = 0;
}
pthread_mutex_unlock(&mutex);

/* if something went wrong, restart the connection */
if (bytes != imgsize) {
fprintf(stderr, "Connection closed.\n");
close(clientsock);

if ((clientsock = accept(serversock, NULL, NULL)) == -1) {
quit("accept() failed", 1);
}
}

/* have we terminated yet? */
pthread_testcancel();

/* no, take a rest for a while */
usleep(1000);
}
}

Answer 2

看看UNIX网络编程socket部分!