/usr/include/diet/netpacket/packet.h is in dietlibc-dev 0.33~cvs20120325-6+deb8u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | #ifndef __NETPACKET_PACKET_H
#define __NETPACKET_PACKET_H
#include <sys/cdefs.h>
__BEGIN_DECLS
struct sockaddr_ll {
  unsigned short int sll_family;
  unsigned short int sll_protocol;
  int sll_ifindex;
  unsigned short int sll_hatype;
  unsigned char sll_pkttype;
  unsigned char sll_halen;
  unsigned char sll_addr[8];
};
#define PACKET_HOST		0		/* To us.  */
#define PACKET_BROADCAST	1		/* To all.  */
#define PACKET_MULTICAST	2		/* To group.  */
#define PACKET_OTHERHOST	3		/* To someone else.  */
#define PACKET_OUTGOING		4		/* Originated by us. */
#define PACKET_LOOPBACK		5
#define PACKET_FASTROUTE	6
/* Packet socket options.  */
#define PACKET_ADD_MEMBERSHIP		1
#define PACKET_DROP_MEMBERSHIP		2
#define PACKET_RECV_OUTPUT		3
#define PACKET_RX_RING			5
#define PACKET_STATISTICS		6
struct packet_mreq {
  int mr_ifindex;
  unsigned short int mr_type;
  unsigned short int mr_alen;
  unsigned char mr_address[8];
};
#define PACKET_MR_MULTICAST	0
#define PACKET_MR_PROMISC	1
#define PACKET_MR_ALLMULTI	2
__END_DECLS
#endif
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