Get problem about Select function in Socket Application

win77man — Tue, 29 Oct 2019 05:19:52 GMT

I Need your help

I have a board but i had got a problem "IMX6QP SabreSD"

Development environment :

1. IMX6QP SabreSD (Board)

2. imx-yocto-L4.14.98_2.0.0_ga (Linux)

Problem :

1. Select() use

Receive ok inside 10sec, but do not wait until receive data when 10sec ~ 2minute after open

2. polling check recv()

Receive ok inside 10sec, but do not wait until receive data when 10sec ~ 2minute after open( Same result)

I want wait until receive data but bypass (receive size 0, both "select()" and "while recv()") after open 10 sec

I try in order to find an answer with kernel source at "/drivers/net/ethernet/freescale/ fec_main,c, fec_pt.c, phy_device.c" But I cann't find answer

======================================================================================

// Act as Client

main()

{

int m_socket, recvBytes;

struct addrinfo server_addr, *addr = NULL;

struct sockaddr_in addr4;

char szBuffer[512];

fd_set m_fdRead;

m_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

memset(&server_addr, 0, sizeof(server_addr));

server_addr.sin_family = AF_INET;

server_addr.sin_addr.s_addr = inet_addr("192.168.0.100"); //"192.168.0.100": Linux server

server_addr.sin_port = htons("9001"); //9001: Temporary port

connect( m_socket, (struct sockaddr *)&addr4, sizeof(addr4));

#if (USE_SELECT == 1)

while(1)

{

memset(szBuffer, 0, sizeof(szBuffer));

FD_ZERO(&m_fdRead);

FD_SET(m_socket, &m_fdRead);

select(m_socket+1, &m_fdRead, NULL, NULL, NULL);

if(FD_ISSET(m_socket, &m_fdWrite) {

Recv(szBuffer, 512, 0);

printf("Receive Msg is: %s", szBuffer);

}

#else

while(1)

{

memset(szBuffer, 0, sizeof(szBuffer));

recvBytes = 0;

while(recvBytes == 0)

{

recv(szBuffer, 512, 0);

usleep(1000);

}

printf("Receive Msg is: %s", szBuffer);

}

#endif

}

=============================================================================

How i can solve a problem

Re: Get problem about Select function in Socket Application

win77man — Tue, 29 Oct 2019 15:56:30 GMT

Find the answer by oneself

This problem was disconnected socket by server

Thanks

topic Get problem about Select function in Socket Application in i.MX Processors

Get problem about Select function in Socket Application

Re: Get problem about Select function in Socket Application