我正在开发我的 Android 应用程序的 iOS 版本,它通过常规 TCP 连接不断向服务器发送一些二进制数据。虽然 Java 代码可以正常工作,但我的纯 C 代码却不能——在第一组数据发送到服务器后连接中断。我设法使用 CFNetwork 框架重新实现 Java 解决方案,但是我的 C 代码仍然是一个问题......
C 代码(错误检查和无趣的代码被删除):
mSocket = socket(AF_INET, SOCK_STREAM, 0);
//...
connect(mSocket, (struct sockaddr *)&sin, sizeof(sin));
int keepalive = 1;
int res = setsockopt(mSocket, SOL_SOCKET, SO_KEEPALIVE, (void *)&keepalive,
sizeof(int));
int set = 1;
setsockopt(mSocket, SOL_SOCKET, SO_NOSIGPIPE, (void *)&set, sizeof(int));
unsigned char buffer* = //...;
int ret = send(mSocket, buffer, bufferLen, 0); //handshake with server, runs fine
while(/*there is new data*/) {
buffer = new_data(); //some fake method
ret = send(mSocket, buffer, bufferLen, 0); //On the second iteration
//write returns -1
}
然而,这个基于 CFNetwork 的 Objective-C 代码工作得很好......
Objective-C 代码:
CFStreamCreatePairWithSocketToHost(kCFAllocatorDefault,
host,
port,
&readStream,
&writeStream);
CFWriteStreamOpen(mServerWriteStream);
while(/*there is new data*/) {
NSData* data = //....
int wroteBytes = CFWriteStreamWrite(mServerWriteStream, [data bytes], [data length]);
}
所以我对我在 C 代码中做错了什么感到困惑,并会感谢任何提示
谢谢