📄 leases.h
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/* leases.h */#ifndef _LEASES_H#define _LEASES_Hstruct dhcpOfferedAddr { uint8_t chaddr[16]; uint32_t yiaddr; /* network order */ uint32_t expires; /* host order */};extern uint8_t blank_chaddr[];void clear_lease(uint8_t *chaddr, uint32_t yiaddr);struct dhcpOfferedAddr *add_lease(uint8_t *chaddr, uint32_t yiaddr, unsigned long lease);int lease_expired(struct dhcpOfferedAddr *lease);struct dhcpOfferedAddr *oldest_expired_lease(void);struct dhcpOfferedAddr *find_lease_by_chaddr(uint8_t *chaddr);struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr);uint32_t find_address(int check_expired);#endif
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