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Altera_Forum's avatar
Altera_Forum
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18 years ago

problem changing static IP in socket server application

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??

6 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    18 years ago

    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.
  • Altera_Forum's avatar
    Altera_Forum
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    18 years ago

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

  • Altera_Forum's avatar
    Altera_Forum
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    18 years ago

    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's avatar
    Altera_Forum
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    18 years ago

    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's avatar
    Altera_Forum
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    18 years ago

    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 }