text: /* vi: set sw=4 ts=4: */
  /*
   * Storing and retrieving data for static leases
   *
   * Wade Berrier <wberrier@myrealbox.com> September 2004
   *
   * Licensed under GPLv2, see file LICENSE in this source tree.
   */
  #include "common.h"
  #include "dhcpd.h"
  
  /* Takes the address of the pointer to the static_leases linked list,
   * address to a 6 byte mac address,
   * 4 byte IP address */
  void FAST_FUNC add_static_lease(struct static_lease **st_lease_pp,
  		uint8_t *mac,
  		uint32_t nip)
  {
  	struct static_lease *st_lease;
  
  	/* Find the tail of the list */
  	while ((st_lease = *st_lease_pp) != NULL) {
  		st_lease_pp = &st_lease->next;
  	}
  
  	/* Add new node */
  	*st_lease_pp = st_lease = xzalloc(sizeof(*st_lease));
  	memcpy(st_lease->mac, mac, 6);
  	st_lease->nip = nip;
  	/*st_lease->next = NULL;*/
  }
  
  /* Find static lease IP by mac */
  uint32_t FAST_FUNC get_static_nip_by_mac(struct static_lease *st_lease, void *mac)
  {
  	while (st_lease) {
  		if (memcmp(st_lease->mac, mac, 6) == 0)
  			return st_lease->nip;
  		st_lease = st_lease->next;
  	}
  
  	return 0;
  }
  
  /* Check to see if an IP is reserved as a static IP */
  int FAST_FUNC is_nip_reserved(struct static_lease *st_lease, uint32_t nip)
  {
  	while (st_lease) {
  		if (st_lease->nip == nip)
  			return 1;
  		st_lease = st_lease->next;
  	}
  
  	return 0;
  }
  
  #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
  /* Print out static leases just to check what's going on */
  /* Takes the address of the pointer to the static_leases linked list */
  void FAST_FUNC log_static_leases(struct static_lease **st_lease_pp)
  {
  	struct static_lease *cur;
  
  	if (dhcp_verbose < 2)
  		return;
  
  	cur = *st_lease_pp;
  	while (cur) {
  		bb_error_msg("static lease: mac:%02x:%02x:%02x:%02x:%02x:%02x nip:%x",
  			cur->mac[0], cur->mac[1], cur->mac[2],
  			cur->mac[3], cur->mac[4], cur->mac[5],
  			cur->nip
  		);
  		cur = cur->next;
  	}
  }
  #endif
  