error in iniche tcp/ip stack source code

Hi

First of all I'm fairly new to sockets programming.

when I am building my project I have got the following error

'MAXNETS' undeclared here (not in a function)    net.h       372
make;***Error 1                         
syntax error before '}' token                             net.h       297
syntax error before "ip_addr"                             net.h       235
syntax error before "n_defgw"                           net.h       238
syntax error before "n_netbr"                            net.h       239
syntax error before "n_netbr42"                           net.h     240
syntax error before "n_subnetbr"                       net.h        241
syntax error before "snmask"                            net.h        237
syntax error before "struct"                              net.h        229

i don't know what i can do can any one help me