AW: [En-Nut-Discussion] SNTP problems

[Oliver Schulz]

Hello,
 
on the first look, I would say, that you forgat to allocate heap space
for *data. 
Please add a line, like this: data = NutHeapAllocClear(sizeof(*data))
 
Since Nut/OS release 3.4.1, there are some time related functions
available, among them also a (working) sntp client in /pro/sntp.c.
 
Cheers,
Oliver.


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Von: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de]Im Auftrag von tomek w
Gesendet: Freitag, 23. April 2004 02:36
An: en-nut-discussion at egnite.de
Betreff: [En-Nut-Discussion] SNTP problems


Hi everyone.
I am working on some project now and i need to synchronise Ethernut
board using SNTP.
I cut a little source code of  Lars H. Andersson's SNTP implementation
but it doesn't work, neither the non-modified code.
What could be the problem? What i am doing wrong?
 
Here is part of my sorce code:
 
typedef struct _sntpframe sntpframe;
struct _sntpframe {
    u_char mode;
    u_char stratum;
    u_char poll;
    u_char precision;
    u_long root_delay;
    u_long root_dispersion;
    u_long reference_identifier;
    u_long reference_ts_sec;
    u_long reference_ts_frac;
    u_long originate_ts_sec;
    u_long originate_ts_frac;
    u_long receive_ts_sec;
    u_long receive_ts_frac;
    u_long transmit_ts_sec;
    u_long transmit_ts_frac;
};

sntpframe *data; 
u_long server_addr;
server_addr=inet_addr("150.254.183.15");
u_short     NTPort    = 123;
int len;
UDPSOCKET *sock = NULL; 
u_long rec_addr = 0;
u_short port; 
u_short bufsize = 256;
sock = NutUdpCreateSocket(0);
data->mode = 0x1B;
NutUdpSetSockOpt(sock, SO_RCVBUF, &bufsize, sizeof(bufsize));
NutUdpSendTo(sock, server_addr,NTPort, data, sizeof(*data));
len = NutUdpReceiveFrom(sock, &rec_addr, &port, data, sizeof(*data),
5000);
NutUdpDestroySocket(sock); 

It returns sth not equal to 0 for createsocket, 0 for udpsend and 0 for
udpreceive.
I checked the server adress with windows ntp client and it works all the
time.
Thanks for any help.



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