problem changing static IP in socket server application

Altera_Forum · ‎10-21-2008

I'm trying to test simple sockect server example in Cyclone III NIOS II eval kit using NIOS IDE 8.0.

I checked this example in my old version 7.2 of Quartus and it worked fine!!!

I tried to change static IP in simple_socket_server.h using

# define IPADDR0 192

# define IPADDR1 168

# define IPADDR2 10

# define IPADDR3 11

and settind *use_dhcp=0

by making those changes my simple socket server application worked in 7.2. but in this 8.0 version the static IP never changes from the adress 0.10.10.11.

I've debugged the code and I think htonl instruction doesn't work properly.

# define IP4_ADDR(ipaddr, a,b,c,d) ipaddr =

htonl(((alt_u32)(a & 0xff) << 24) | ((alt_u32)(b & 0xff) << 16) |

((alt_u32)(c & 0xff) << 8) | (alt_u32)(d & 0xff))

any suggestion??

Altera_Forum · ‎10-21-2008

What about with the endianess?

try whit this code:

unsigned int htonl (unsigned int x) {

# if BYTE_ORDER == LITTLE_ENDIAN

unsigned char *s = (unsigned char *) &x;

return (unsigned int) (s[0] << 24 | s[1] << 16 | s[2] << 8 | s[3]);

# else return x;# endif }

Altera_Forum · ‎10-21-2008

The project now works as in EDS 7.2. Thank you for giving me this solution.

Could you explain to me why I didn't have to use this instruction in EDS 7.2???

Do you know another difference in EDS 8.0 ??

Altera_Forum · ‎10-21-2008

This function , simply reorders the bytes according to the processor endianess.

The only reason I see for which it didtn't work is due to your processor endianess.

Altera_Forum · ‎10-21-2008

then following your comments the difference between my 7.2 and 8.0 could be the NIOS endian configuration

Altera_Forum · ‎10-21-2008

There is a bug in the 8.0 IP4_ADDR() macro. See this fix:

http://www.altera.com/support/kdb/solutions/rd06062008_934.html

Altera_Forum · ‎10-22-2008

I've modified simple socket server to be UDP instead TCP server.

I've tried to set the destination IP addres by using

UDP_sender.sin_family = AF_INET;
UDP_sender.sin_port = htons(30);
inet_atom ("192.168.10.10", UDP_sender.sin_addr);

or using

UDP_sender.sin_family = AF_INET;
UDP_sender.sin_port = htons(30);
IP4_ADDR (UDP_sender.sin_addr.s_addr,192,168,10,10);

both possibilities were working in EDS 7.2 but doesn't in EDS 8.0

When running both attempts, compiler is failing because 'IP4_ADDR' or 'inet_atom' are undefined references.