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