Tool/software: Code Composer Studio
How can i rebuild sntp.c manually? I want to change some code and order for the SNTP_internalServersList.
When i use the AWS code to connect the AWS server, i constantly get (-100) when i am in CHINA. Sometime, the SNTP_gettime() is requires to retry 10 times to 20 times to make the connection success
However, the code runs pretty good without problem in HONG KONG.
When i look at the sntp.c, it uses the time.google.com. It seems the problem is the dns server in CHINA. is polluted.
I want to change some time server and rebuild the sntp_release.a file.
When i try a manual getHostbyName, it can reslove the host name
char sntpip[16] = "0.0.0.0";
char sntpserver[24] = "cn.pool.ntp.org";
ifID = SlNetUtil_getHostByName(0, (char *)sntpserver, strlen(sntpserver), addr, &addrLen, SLNETSOCK_AF_INET);
if(ifID >= 0)
{
tempIP = SlNetUtil_ntohl(addr[0]); //changing byte order
SlNetUtil_inetNtop(SLNETSOCK_AF_INET, &tempIP, sntpip, sizeof(sntpip)); //Convert binary to String format
UART_PRINT("\r\nResolved cn.pool.ntp.org from DNS = %s \r\n", sntpip);
}
else
{
UART_PRINT("DNS FAILED!!!!!!!\r\n");
}
sntpip[16] = "0.0.0.0";
sntpserver[24] = "time.google.com";
ifID = SlNetUtil_getHostByName(0, (char *)sntpserver, strlen(sntpserver), addr, &addrLen, SLNETSOCK_AF_INET);
if(ifID >= 0)
{
tempIP = SlNetUtil_ntohl(addr[0]); //changing byte order
SlNetUtil_inetNtop(SLNETSOCK_AF_INET, &tempIP, sntpip, sizeof(sntpip)); //Convert binary to String format
UART_PRINT("\r\nResolved time.google.com from DNS = %s \r\n", sntpip);
}
else
{
UART_PRINT("DNS FAILED!!!!!!!\r\n");
}
the codes give me below result
Resolved cn.pool.ntp.org from DNS = 193.182.111.142 <--- correct
Resolved time.google.com from DNS = 51.158.186.98 <----- looks like incorrect
Resolved cn.pool.ntp.org from DNS = 84.16.73.33 <--- correct
Resolved time.google.com from DNS = 193.182.111.142 <----- looks like incorrect
Result from a DOS prompt
> time.google.com
Server: router.asus.com
Address: 192.168.50.1
Non-authoritative answer:
Name: time.google.com
Addresses: 2001:4860:4806:c::
2001:4860:4806::
2001:4860:4806:4::
2001:4860:4806:8::
216.239.35.8
216.239.35.12
216.239.35.4
216.239.35.0
> cn.pool.ntp.org
Server: router.asus.com
Address: 192.168.50.1
Non-authoritative answer:
Name: cn.pool.ntp.org
Addresses: 116.203.151.74
84.16.73.33
51.158.186.98
193.182.111.142
