/usr/src/xtables-addons-2.12/extensions/xt_DHCPMAC.h is in xtables-addons-dkms 2.12-0.1.
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 | #ifndef _LINUX_NETFILTER_XT_DHCPMAC_H
#define _LINUX_NETFILTER_XT_DHCPMAC_H 1
#define DH_MAC_FMT "%02X:%02X:%02X:%02X:%02X:%02X"
#define DH_MAC_HEX(z) z[0], z[1], z[2], z[3], z[4], z[5]
struct dhcpmac_info {
unsigned char addr[ETH_ALEN];
uint8_t mask, invert;
};
#endif /* _LINUX_NETFILTER_XT_DHCPMAC_H */
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