標籤:nbsp oid ret 校正 main init ever else mdi
- (void)CreateSocket{
NSString *host = [self.realStreamDict objectForKey:@"StreamSeverIP"];
NSString * StreamServerPort = [self.realStreamDict objectForKey:@"StreamSeverPort"];
// NSString *host = @"172.16.24.223";
//
// NSString * StreamServerPort [email protected]"6123";
if(host.length==0||_isConnectToSocketServer||_haveConnectSocket){
return;
}
_haveConnectSocket = YES;
BOOL socketConnectSuccess = [self connection:host port:StreamServerPort.intValue];
if (socketConnectSuccess ) {
NSLog(@"sock串連成功");
}
else{
[self CreateSocket];
return;
NSLog(@"sock串連失敗");
}
//選擇性發送頭校正
NSData * headData = [self sendHeaderInformation];
if (headData.length>0) {
send(self.clientSocket,headData.bytes,headData.length, 0);
}
uint8_t buffer[1024];
// 從伺服器接收過來的資料
ssize_t recvLen = recv(self.clientSocket, buffer, sizeof(buffer), 0);
// 按照伺服器返回的長度,從 buffer 中,讀取位元據,建立 NSData 對象
if(recvLen>0){
NSData *data = [NSData dataWithBytes:buffer length:recvLen];
NSString *info = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
if ([info hasPrefix:@"TXEH"]) {
self.isConnectToSocketServer = YES;
NSLog(@"串連socket 成功。。。");
}
else{
close(self.clientSocket);
[self CreateSocket];
}
}
}
// MARK: Socket
- (BOOL)connection:(NSString *)hostText port:(int)port {
// socket
/**
參數
domain: 協議域,AF_INET(IPV4的網路開發)
type: Socket 類型,SOCK_STREAM(TCP)/SOCK_DGRAM(UDP,報文)
protocol: IPPROTO_TCP,協議,如果輸入0,可以根據第二個參數,自動選擇協議
傳回值
socket,如果 > 0 就表示成功
*/
self.clientSocket = socket(AF_INET, SOCK_STREAM, 0);
if (self.clientSocket > 0) {
NSLog(@"Socket Create success %d", self.clientSocket);
} else {
NSLog(@"Socket Create error");
}
//connection 串連到“伺服器”
/**
參數
1> 用戶端socket
2> 指向資料結構sockaddr的指標,其中包括目的連接埠和IP地址
伺服器的"結構體"地址,C語言沒有對象
3> 結構體資料長度
傳回值
0 成功/其他 錯誤代號,非0即真
*/
struct sockaddr_in serverAddress;
// IPV4 - 協議
serverAddress.sin_family = AF_INET;
// inet_addr函數可以把ip地址轉換成一個整數
serverAddress.sin_addr.s_addr = inet_addr(hostText.UTF8String);
// 連接埠小端儲存
serverAddress.sin_port = htons(port);
int result = connect(self.clientSocket, (const struct sockaddr *)&serverAddress, sizeof(serverAddress));
int nNetTimeout=1000;//1秒
setsockopt(self.clientSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&nNetTimeout, sizeof(int));
// 如果串連成功返回 YES 33
return (result == 0);
}
iOS 簡單socket串連