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/*
* Copyright 2008, The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _WIFI_DHCP_H_
#define _WIFI_DHCP_H_
#include <sys/types.h>
#define PORT_BOOTP_SERVER 67
#define PORT_BOOTP_CLIENT 68
/* RFC 2131 p 9 */
typedef struct dhcp_msg dhcp_msg;
#define OP_BOOTREQUEST 1
#define OP_BOOTREPLY 2
#define FLAGS_BROADCAST 0x8000
#define HTYPE_ETHER 1
struct dhcp_msg
{
uint8_t op; /* BOOTREQUEST / BOOTREPLY */
uint8_t htype; /* hw addr type */
uint8_t hlen; /* hw addr len */
uint8_t hops; /* client set to 0 */
uint32_t xid; /* transaction id */
uint16_t secs; /* seconds since start of acq */
uint16_t flags;
uint32_t ciaddr; /* client IP addr */
uint32_t yiaddr; /* your (client) IP addr */
uint32_t siaddr; /* ip addr of next server */
/* (DHCPOFFER and DHCPACK) */
uint32_t giaddr; /* relay agent IP addr */
uint8_t chaddr[16]; /* client hw addr */
char sname[64]; /* asciiz server hostname */
char file[128]; /* asciiz boot file name */
uint8_t options[1024]; /* optional parameters */
};
#define DHCP_MSG_FIXED_SIZE 236
/* first four bytes of options are a cookie to indicate that
** the payload are DHCP options as opposed to some other BOOTP
** extension.
*/
#define OPT_COOKIE1 0x63
#define OPT_COOKIE2 0x82
#define OPT_COOKIE3 0x53
#define OPT_COOKIE4 0x63
/* BOOTP/DHCP options - see RFC 2132 */
#define OPT_PAD 0
#define OPT_SUBNET_MASK 1 /* 4 <ipaddr> */
#define OPT_TIME_OFFSET 2 /* 4 <seconds> */
#define OPT_GATEWAY 3 /* 4*n <ipaddr> * n */
#define OPT_DNS 6 /* 4*n <ipaddr> * n */
#define OPT_DOMAIN_NAME 15 /* n <domainnamestring> */
#define OPT_BROADCAST_ADDR 28 /* 4 <ipaddr> */
#define OPT_REQUESTED_IP 50 /* 4 <ipaddr> */
#define OPT_LEASE_TIME 51 /* 4 <seconds> */
#define OPT_MESSAGE_TYPE 53 /* 1 <msgtype> */
#define OPT_SERVER_ID 54 /* 4 <ipaddr> */
#define OPT_PARAMETER_LIST 55 /* n <optcode> * n */
#define OPT_MESSAGE 56 /* n <errorstring> */
#define OPT_CLASS_ID 60 /* n <opaque> */
#define OPT_CLIENT_ID 61 /* n <opaque> */
#define OPT_END 255
/* DHCP message types */
#define DHCPDISCOVER 1
#define DHCPOFFER 2
#define DHCPREQUEST 3
#define DHCPDECLINE 4
#define DHCPACK 5
#define DHCPNAK 6
#define DHCPRELEASE 7
#define DHCPINFORM 8
int init_dhcp_discover_msg(dhcp_msg *msg, void *hwaddr, uint32_t xid);
int init_dhcp_request_msg(dhcp_msg *msg, void *hwaddr, uint32_t xid,
uint32_t ipaddr, uint32_t serveraddr);
#endif
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