Compiling Error with /netinet/if_ether.h

[kardon33]

I am trying to compile a program that i beginning to write and I need to include if_ether.h for some Arp Headers, But I keep getting compile errors when I include the file.

Errors
 
In file included from arpme.c:27:
/usr/include/netinet/if_ether.h:147: error: field `ea_hdr' has incomplete type
/usr/include/netinet/if_ether.h:162: error: field `ac_if' has incomplete type
/usr/include/netinet/if_ether.h:183: error: field `sin_addr' has incomplete type
/usr/include/netinet/if_ether.h:184: error: field `sin_srcaddr' has incomplete type
 
_________________________________
 
//Included Files
 
#include <ctype.h>
 #include <sys/ioctl.h>
 #include <fcntl.h>
// +
#include <sys/param.h>
 #include <sys/sysctl.h>
 
#include <sys/timeb.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <ctype.h>
 
#include <sys/types.h>
#include <sys/time.h>
#include <net/bpf.h>
 
#ifdef HAVE_IFADDRS_H
   #include <ifaddrs.h>
#endif
#include <sys/socket.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <net/if_types.h>
#include <arpa/inet.h>
 
#include <netinet/if_ether.h>
#ifdef HAVE_NET_ETHERNET_H
   #include <net/ethernet.h>
#endif
 
 
 

[kardon33]

Found out that if I include netinet/in.h that it gets rid of the last two errors,

#/usr/include/netinet/if_ether.h:183: error: field `sin_addr' has incomplete type
#/usr/include/netinet/if_ether.h:184: error: field `sin_srcaddr' has incomplete type

but I still have the first two.

I tried grepping both ea_hdr and ac_if but nothing comes up except for if_ether.h so I don't think im missing a include.

[weaknessforcats]

So what does if_ether.h look like around line 147.

That is where the compiler threw in the towel. So the actual is there or sometime earlier.

[kardon33]

Around 147 it looks like

// 146 struct    ether_arp {
// 147     struct     arphdr ea_hdr;            /* fixed-size header */
// 148     u_int8_t arp_sha[ETHER_ADDR_LEN];    /* sender hardware address */
// 149     u_int8_t arp_spa[4];            /* sender protocol address */
// 150     u_int8_t arp_tha[ETHER_ADDR_LEN];    /* target hardware address */
// 151     u_int8_t arp_tpa[4];            /* target protocol address */
};
 

But I have found a fix, I hope this helps some one else out,

Before you include /netinet/if_ether.h you have to include... (Im not 100% you need them all but for me this works so im keeping it)

#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#if    !defined(ultrix) && !defined(__osf__)
#include <net/if_arp.h>
#endif
#include <netinet/in.h>
#include <netinet/if_ether.h>
 

[weaknessforcats]

It looks like struct arphdr is not known to the compiler. Where is that declared?