recvfrom 只收到几个数据包，之后它进入等待状态

嗨，我是套接字编程的新手，并尝试创建一个客户端服务器应用程序，其中我的服务器是我的C++应用程序中的相机和客户端。 当我看到计算机和相机之间的数据包传输时，它显示相机在停止之后发送了超过 150000 个数据包。但是当我收到我能够一次接收400 - 450 packets时，recvfrom函数进入等待状态。如果我再次运行该exe文件而不停止前一个文件，它将再次收到400-450 packets.

接收数据包的代码

SOCKET out1 = socket(AF_INET, SOCK_RAW, IPPROTO_UDP);
if (out1 == INVALID_SOCKET)
{
cout << out1 << endl;
}
server.sin_family = AF_INET;
server.sin_port = htons(3956);
inet_pton(AF_INET, "192.168.1.140", &server.sin_addr);
int serverLength = sizeof(server);
connect(out1, (sockaddr*)&server, serverLength);
while (1)
{
memset(buf, 0, sizeof(buf));
int bytesIn = recvfrom(out1, buf, 1444, 0, (sockaddr*)&server, &serverLength);
if (bytesIn > 0)
{
cout << "Image Received :" << bytesIn <<packet_counter << endl;
packet_counter++;
}
else
{
cout << "Not Received : " << endl;
}
}

我正在使用管理员权限运行.exe。

所以任何人都可以告诉我为什么 recvfrom 函数处于等待状态。

提前谢谢。

编辑：-

抱歉，我提供了整个代码。

#include <stdio.h>
#include <Windows.h>
#include <thread>
#include <WinSock2.h>
// Library
#pragma comment(lib, "ws2_32.lib")
using namespace std;
//***** Function Decleration *****//
void _packetConfig(SOCKET);
void _sendPacket(SOCKET, const char*, int, int);
// Global Variable
sockaddr_in server;
//***** Main Function *****//
void main(char argc, char* argv[])
{
WSADATA data;
WORD version = MAKEWORD(2, 2);
if(WSAStartup(version, &data) == SOCKET_ERROR)
{
cout << "Can't Start Socket" << WSAGetLastError<<endl;
return;
}
char buf[2000];
SOCKET out1 = socket(AF_INET, SOCK_RAW, IPPROTO_UDP);
if (out1 == INVALID_SOCKET)
{
cout << out1 << endl;
}
server.sin_family = AF_INET;
server.sin_port = htons(3956);
inet_pton(AF_INET, "192.168.1.140", &server.sin_addr);
int serverLength = sizeof(server);
connect(out1, (sockaddr*)&server, serverLength);

int packet_counter = 0;

SOCKET out = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
_packetConfig(out);
cout << "Inside Main" << endl;
while (1)
{
//connect(out1, (sockaddr*)&server, serverLength);
memset(buf, 0, sizeof(buf));
int bytesIn = recvfrom(out1, buf, 1444, 0, (sockaddr*)&server, &serverLength);
if (bytesIn > 0)
{
cout << "Image Received :" << bytesIn <<packet_counter << endl;
packet_counter++;
}
else
{
cout << "Not Received : " << endl;
}
}
WSACleanup();
}
//***** Function to Send Bytes to the Camera *****//
void _sendPacket(SOCKET sock, const char* s, int len, int i)
{
int sendOk = sendto(sock, (const char*)s, len, 0, (sockaddr*)&server, sizeof(server));
if (sendOk == SOCKET_ERROR)
{
cout << "Didn't Work" << WSAGetLastError() << endl;
}
else
{
cout << "nSend Succesfully" << " " << i << endl;
}
char buf[2000];
int serverLength = sizeof(server);
int bytesIn = recvfrom(sock, buf, 2000, 0, (sockaddr*)&server, &serverLength);
if (bytesIn > 0)
{
cout << "Message Received :" << bytesIn << endl;
}
}
//***** Function to call the _sendPacket function and send commands to the Camera *****//
void _packetConfig(SOCKET sock)
{
// 59 Commands and every command call _snedPacket function to send commands to camera  it will working properly
}

在上面的代码中，我必须首先发送用_packetConfig函数编写的59 commands然后只有相机会发送Image packets我收到所有命令的回复。

当我也使用该代码运行 wireshark 时，我可以看到在这 59 个命令之后 摄像机提供3580*51数据包，即 51 帧，每帧包含 3580 个数据包