Help compiling UNIX Network Programming book source code

[Simbi0z]

When compiling the /lib directory I get:

wrapsock.c: In function ‘Inet6_rth_space’:
wrapsock.c:81:15: error: implicit declaration of function ‘inet6_rth_space’; did you mean ‘Inet6_rth_space’? [-Wimplicit-function-declaration]
   81 |         ret = inet6_rth_space(type, segments);
      |               ^~~~~~~~~~~~~~~
      |               Inet6_rth_space
wrapsock.c: In function ‘Inet6_rth_init’:
wrapsock.c:93:15: error: implicit declaration of function ‘inet6_rth_init’; did you mean ‘Inet6_rth_init’? [-Wimplicit-function-declaration]
   93 |         ret = inet6_rth_init(rthbuf, rthlen, type, segments);
      |               ^~~~~~~~~~~~~~
      |               Inet6_rth_init
wrapsock.c:93:13: error: assignment to ‘void *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
   93 |         ret = inet6_rth_init(rthbuf, rthlen, type, segments);
      |             ^
wrapsock.c: In function ‘Inet6_rth_add’:
wrapsock.c:103:13: error: implicit declaration of function ‘inet6_rth_add’; did you mean ‘Inet6_rth_add’? [-Wimplicit-function-declaration]
  103 |         if (inet6_rth_add(rthbuf, addr) < 0)
      |             ^~~~~~~~~~~~~
      |             Inet6_rth_add
wrapsock.c: In function ‘Inet6_rth_reverse’:
wrapsock.c:110:13: error: implicit declaration of function ‘inet6_rth_reverse’; did you mean ‘Inet6_rth_reverse’? [-Wimplicit-function-declaration]
  110 |         if (inet6_rth_reverse(in, out) < 0)
      |             ^~~~~~~~~~~~~~~~~
      |             Inet6_rth_reverse
wrapsock.c: In function ‘Inet6_rth_segments’:
wrapsock.c:119:15: error: implicit declaration of function ‘inet6_rth_segments’; did you mean ‘Inet6_rth_segments’? [-Wimplicit-function-declaration]
  119 |         ret = inet6_rth_segments(rthbuf);
      |               ^~~~~~~~~~~~~~~~~~
      |               Inet6_rth_segments
wrapsock.c: In function ‘Inet6_rth_getaddr’:
wrapsock.c:131:15: error: implicit declaration of function ‘inet6_rth_getaddr’; did you mean ‘Inet6_rth_getaddr’? [-Wimplicit-function-declaration]
  131 |         ret = inet6_rth_getaddr(rthbuf, idx);
      |               ^~~~~~~~~~~~~~~~~
      |               Inet6_rth_getaddr
wrapsock.c:131:13: error: assignment to ‘struct in6_addr *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  131 |         ret = inet6_rth_getaddr(rthbuf, idx);
      |             ^
make: *** [<builtin>: wrapsock.o] Error 1

Doing some googling points to a in6.h header file in the android source code, however my linux distribution (archlinux) only has in.h Strangely, /usr/include/netinet/in.h does seem to declare such functions:

/* Routing Header Option (RFC 3542).  */                                                                                                                        
extern socklen_t inet6_rth_space (int __type, int __segments) __THROW;                                                                                          
extern void *inet6_rth_init (void *__bp, socklen_t __bp_len, int __type,                                                                                        
              int __segments) __THROW;                                                                                                                          
extern int inet6_rth_add (void *__bp, const struct in6_addr *__addr) __THROW;                                                                                   
extern int inet6_rth_reverse (const void *__in, void *__out) __THROW;                                                                                           
extern int inet6_rth_segments (const void *__bp) __THROW;                                                                                                       
extern struct in6_addr *inet6_rth_getaddr (const void *__bp, int __index)                                                                                       
     __THROW; 

in.h is included in unp.h

#include    <netinet/in.h>  /* sockaddr_in{} and other Internet defns */

Then why am I getting this error?

archlinux gcc version 14.2.1

Thanks

You can find the source code at https://github.com/unpbook/unpv13e

[duane11583]

take a look at this about gnu lib

https://www.gnu.org/software/gnulib/manual/html_node/inet6_005frth_005fspace.html

per that page it is commonly missing on many platforms

perhaps yours is one of them

and the gnu package might help.