NDK socket creation error

Hello Hae,

The error code of -1 is for SOCKET_ERROR which means socket creation failure. 

Also many socket APIs return -1 for failure. You should call fdError() in the fail loop to get the error code which will tell exact error code

The error code mapping is given in the - ti/ndk/inc/serrno.h file

Also the snippet you shared is not enough for finding error cause.
Can you please shared whole program to check if any obvious issue?

Hello Prasad, 

Thanks for your feedback.

Would you please check following snippet is correct for using fdError() ?

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

    sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sockfd == -1) {
        err = fdError();
    	Log_info1("Error: socket not created. err=%d", err);
        goto shutdown;
    }

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

as I have tested, still I have get err = -1 from the log

please take a look at the following code 

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

int getNTPTime(void)
{
    int                sockfd;
    struct sockaddr_in localAddr;
    struct sockaddr_in ntpServerAddr;
    socklen_t          addrlen;
    //int                bytesRcvd;
    int                status;
    uint8_t				dataBuf[MAX_BUF_SIZE];
    uint32_t 			elapsedSec;
    int err;

    sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if (sockfd == -1) {
    	err = fdError();
    	Log_info1("Error: socket not created. err=%d", err);
        goto shutdown;
    }

    memset(dataBuf, 0, sizeof(dataBuf));
    dataBuf[0] = '\x1b';

    addrlen = sizeof(struct sockaddr_in);
    ntpServerAddr.sin_family = AF_INET;
    ntpServerAddr.sin_port = 123;
    ntpServerAddr.sin_addr.s_addr = 0x744EE9D3;

	sendto(sockfd, dataBuf, sizeof(dataBuf), 0, (struct sockaddr*)&ntpServerAddr, addrlen);

    localAddr.sin_family = AF_INET;
    localAddr.sin_port = 0;
    localAddr.sin_addr.s_addr = htonl(INADDR_ANY);

    status = bind(sockfd, (struct sockaddr *)&localAddr, addrlen);
    if (status == -1) {
    	Log_info0("Error: bind failed.");
        goto shutdown;
    }

    addrlen = sizeof(ntpServerAddr);
    recvfrom(sockfd, dataBuf, MAX_BUF_SIZE, 0, (struct sockaddr*)&ntpServerAddr, &addrlen);
    if((dataBuf[0] & 0x7) != 4)    /* expect only server response */
    {
        /* MODE is not server, abort */
    	Log_info0(" Device is expecting response from server only!");
    	goto shutdown;
    }
    else
    {
        elapsedSec = dataBuf[40];
        elapsedSec <<= 8;
        elapsedSec += dataBuf[41];
        elapsedSec <<= 8;
        elapsedSec += dataBuf[42];
        elapsedSec <<= 8;
        elapsedSec += dataBuf[43];

        elapsedSec -= TIME2013;

        /* correct the time zone */
        elapsedSec += (GMT_TIME_ZONE_HR * SEC_IN_HOUR);
        elapsedSec += (GMT_TIME_ZONE_MIN * SEC_IN_MIN);

        Log_info1("NTP elapsedSec = %d", elapsedSec);
    }

    close(sockfd);
    return 0;

shutdown:
	if (sockfd > 0) {
		close(sockfd);
	}
	return 1;
}
===============

This code is modified from get_time example of CC3100_SDK.

Thanks for your feedback.

Best Regards,

Hae Ryong