[英]Facing an error while sending file chunks through C++ tcp socket on Windows
[英]Bad file descriptor error while sending data through tcp socket
我想创建数据,然后发送到server
。 在添加新传感器(每个传感器是一个新网络)并通过client.cpp
发送之后,应该在Network.cpp
创建来自每个传感器的信息数据,并使用client.cpp
发送,我使用继承将Network
类的功能添加到client
类,反之亦然需要帮助才能在我的程序工作中正确使用功能。 当我运行程序时,出现此错误:
连接失败。 错误:错误的文件描述符
我想念什么?
Network.h:
class Network :public client{
public:
Network();
void add(Sensor new_sensor);
virtual ~Network();
private:
vector<Sensor> sensors;
}
Network.cpp:
void Network::add(const client &a,Sensor new_sensor) {
sensors.push_back(new_sensor);
unsigned int Header[2] = {0xe1,0xe2};
uint16_t u16;
u16 = htons(Header[2]);
memcpy(packet + 0, &u16, 2);
unsigned int SensorSn[4] = { 0x1e, 0x25, 0x71, 0x80 };
uint32_t u32;
u32 = htons(SensorSn[4]);
memcpy(packet + 2, &u32, 4);
uint32_t a32;
unsigned int SensorTemp[4] = { 0x00, 0x00, 0x00, 0x23 };
a32 = htons(SensorTemp[4]);
memcpy(packet + 6, &a32, 4);
a.send_data();
}
client.h:
class client {
public:
client();
void conn(string, int);
void send_data() const;
string receive(int);
virtual ~client();
private:
int sock;
struct sockaddr_in server_addr;
protected:
char packet[10];
};
}
client.cpp:
void client::conn(string address, int port) {
//create socket if it is not already created
if (sock == -1) {
//Create socket
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
perror("Could not create socket");
}
cout << "Socket created\n" << endl; //doesn't show this line!!!
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(1234);
server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
while(1){
int m=connect(sock, (struct sockaddr *) &server_addr, sizeof(server_addr));
if (m==-1){
perror("connect failed. Error");
continue;
}
}
cout << "Connected\n"; //doesn't show this line!!!
close(sock);
}
void client::send_data()const {
int n=send(sock, packet, sizeof(packet), 0) ;
if (n==-1){
perror("send failed. Error"); ///my program stop in this line
exit(1);
}
cout << "Data send"<<endl;
close(sock);
}
您还记得在构造函数中将sock
初始化为-1
吗?
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