Diff: modules/pico_dhcp_common.h

Revision:

3:b4047e8a0123

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/pico_dhcp_common.h	Fri May 24 15:25:25 2013 +0000
@@ -0,0 +1,102 @@
+/*********************************************************************
+PicoTCP. Copyright (c) 2012 TASS Belgium NV. Some rights reserved.
+See LICENSE and COPYING for usage.
+
+.
+
+*********************************************************************/
+#ifndef _INCLUDE_PICO_DHCP_COMMON
+#define _INCLUDE_PICO_DHCP_COMMON
+
+
+#include <stdint.h>
+
+//minimum size is 576, cfr RFC
+#define DHCPC_DATAGRAM_SIZE 576
+#define DHCPD_DATAGRAM_SIZE 576
+
+
+#define PICO_DHCPD_PORT (short_be(67))
+#define PICO_DHCP_CLIENT_PORT (short_be(68))
+
+#define PICO_DHCP_OP_REQUEST 1
+#define PICO_DHCP_OP_REPLY   2
+
+#define PICO_HTYPE_ETHER 1
+#define PICO_HLEN_ETHER  6
+
+#define PICO_DHCPD_MAGIC_COOKIE (long_be(0x63825363))
+
+/* DHCP OPTIONS, RFC2132 */
+#define PICO_DHCPOPT_PAD                     0x00
+#define PICO_DHCPOPT_NETMASK                 0x01
+#define PICO_DHCPOPT_TIME                    0x02
+#define PICO_DHCPOPT_ROUTER                  0x03
+#define PICO_DHCPOPT_DNS                     0x06
+#define PICO_DHCPOPT_HOSTNAME                0x0c
+#define PICO_DHCPOPT_DOMAINNAME              0x0f
+#define PICO_DHCPOPT_MTU                     0x1a
+#define PICO_DHCPOPT_BCAST                   0x1c
+#define PICO_DHCPOPT_NETBIOSNS               0x2c
+#define PICO_DHCPOPT_NETBIOSSCOPE            0x2f
+
+#define PICO_DHCPOPT_REQIP                   0x32
+#define PICO_DHCPOPT_LEASETIME               0x33
+#define PICO_DHCPOPT_OPTIONOVERLOAD          0x34
+#define PICO_DHCPOPT_MSGTYPE                 0x35
+#define PICO_DHCPOPT_SERVERID                0x36
+#define PICO_DHCPOPT_PARMLIST                0x37
+#define PICO_DHCPOPT_MAXMSGSIZE              0x39
+#define PICO_DHCPOPT_RENEWALTIME             0x3a
+#define PICO_DHCPOPT_REBINDINGTIME           0x3b
+#define PICO_DHCPOPT_DOMAINSEARCH            0x77
+#define PICO_DHCPOPT_STATICROUTE             0x79
+#define PICO_DHCPOPT_END                     0xFF
+
+/* DHCP MESSAGE TYPE */
+#define PICO_DHCP_MSG_DISCOVER               1
+#define PICO_DHCP_MSG_OFFER                  2
+#define PICO_DHCP_MSG_REQUEST                3
+#define PICO_DHCP_MSG_DECLINE                4
+#define PICO_DHCP_MSG_ACK                    5
+#define PICO_DHCP_MSG_NAK                    6
+#define PICO_DHCP_MSG_RELEASE                7
+#define PICO_DHCP_MSG_INFORM                 8
+
+
+enum dhcp_negotiation_state {
+        DHCPSTATE_DISCOVER = 0,
+        DHCPSTATE_OFFER,
+        DHCPSTATE_REQUEST,
+        DHCPSTATE_BOUND,
+        DHCPSTATE_RENEWING
+};
+
+
+struct __attribute__((packed)) pico_dhcphdr
+{
+    uint8_t op;
+    uint8_t htype;
+    uint8_t hlen;
+    uint8_t hops; //zero
+    uint32_t xid; //store this in the request
+    uint16_t secs; // ignore
+    uint16_t flags;
+    uint32_t ciaddr; // client address - if asking for renewal
+    uint32_t yiaddr; // your address (client)
+    uint32_t siaddr; // dhcp offered address
+    uint32_t giaddr; // relay agent, bootp.
+    uint8_t hwaddr[6];
+    uint8_t hwaddr_padding[10];
+    char    hostname[64];
+    char    bootp_filename[128];
+    uint32_t dhcp_magic;
+    uint8_t options[0];
+};
+
+
+//common functions for client and server
+
+uint8_t dhcp_get_next_option(uint8_t *begin, uint8_t *data, int *len, uint8_t **nextopt);
+int is_options_valid(uint8_t *opt_buffer, int len); 
+#endif