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authorDenys Vlasenko2009-06-17 11:57:09 +0200
committerDenys Vlasenko2009-06-17 11:57:09 +0200
commit31af3d5a1dbc750d8646f948ce642e6ae57ce880 (patch)
tree37d72b13f986b1da25def340771b49be4dd3028b /networking/udhcp/dhcpd.h
parentac906fa85e61b4e34161709de777616f858bc945 (diff)
downloadbusybox-31af3d5a1dbc750d8646f948ce642e6ae57ce880.zip
busybox-31af3d5a1dbc750d8646f948ce642e6ae57ce880.tar.gz
udhcp: shorten mac len from 16 to 6 in lease file
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/udhcp/dhcpd.h')
-rw-r--r--networking/udhcp/dhcpd.h37
1 files changed, 20 insertions, 17 deletions
diff --git a/networking/udhcp/dhcpd.h b/networking/udhcp/dhcpd.h
index 53cfad4..7776708 100644
--- a/networking/udhcp/dhcpd.h
+++ b/networking/udhcp/dhcpd.h
@@ -79,30 +79,33 @@ struct server_config_t {
typedef uint32_t leasetime_t;
typedef int32_t signed_leasetime_t;
-//TODO: (1) rename to dyn_lease (that's what it is. we also have static_lease).
-//(2) lease_mac16 may be shortened to lease_mac[6], since e.g. ARP probing uses
-//only 6 first bytes anyway. We can check received dhcp packets
-//that their "chaddr"s have only 6 first bytes != 0, and complain otherwise.
-struct dhcpOfferedAddr {
- uint8_t lease_mac16[16];
+struct dyn_lease {
/* "nip": IP in network order */
- uint32_t lease_nip;
/* Unix time when lease expires. Kept in memory in host order.
* When written to file, converted to network order
* and adjusted (current time subtracted) */
leasetime_t expires;
- uint8_t hostname[20]; /* (size is a multiply of 4) */
+ uint32_t lease_nip;
+ /* We use lease_mac[6], since e.g. ARP probing uses
+ * only 6 first bytes anyway. We check received dhcp packets
+ * that their hlen == 6 and thus chaddr has only 6 significant bytes
+ * (dhcp packet has chaddr[16])
+ */
+ uint8_t lease_mac[6];
+ uint8_t hostname[20];
+ uint8_t pad[2];
+ /* total size is a multiply of 4 */
};
-extern struct dhcpOfferedAddr *leases;
+extern struct dyn_lease *leases;
-struct dhcpOfferedAddr *add_lease(
+struct dyn_lease *add_lease(
const uint8_t *chaddr, uint32_t yiaddr,
leasetime_t leasetime, uint8_t *hostname
) FAST_FUNC;
-int lease_expired(struct dhcpOfferedAddr *lease) FAST_FUNC;
-struct dhcpOfferedAddr *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;
-struct dhcpOfferedAddr *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;
+int lease_expired(struct dyn_lease *lease) FAST_FUNC;
+struct dyn_lease *find_lease_by_chaddr(const uint8_t *chaddr) FAST_FUNC;
+struct dyn_lease *find_lease_by_yiaddr(uint32_t yiaddr) FAST_FUNC;
uint32_t find_free_or_expired_address(const uint8_t *chaddr) FAST_FUNC;
@@ -121,10 +124,10 @@ void print_static_leases(struct static_lease **st_lease_pp) FAST_FUNC;
/*** serverpacket.h ***/
-int send_offer(struct dhcpMessage *oldpacket) FAST_FUNC;
-int send_NAK(struct dhcpMessage *oldpacket) FAST_FUNC;
-int send_ACK(struct dhcpMessage *oldpacket, uint32_t yiaddr) FAST_FUNC;
-int send_inform(struct dhcpMessage *oldpacket) FAST_FUNC;
+int send_offer(struct dhcp_packet *oldpacket) FAST_FUNC;
+int send_NAK(struct dhcp_packet *oldpacket) FAST_FUNC;
+int send_ACK(struct dhcp_packet *oldpacket, uint32_t yiaddr) FAST_FUNC;
+int send_inform(struct dhcp_packet *oldpacket) FAST_FUNC;
/*** files.h ***/