| The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef _WIFI_DHCP_H_ |
| 18 | #define _WIFI_DHCP_H_ |
| 19 | |
| 20 | #include <sys/types.h> |
| 21 | |
| 22 | #define PORT_BOOTP_SERVER 67 |
| 23 | #define PORT_BOOTP_CLIENT 68 |
| 24 | |
| 25 | /* RFC 2131 p 9 */ |
| 26 | typedef struct dhcp_msg dhcp_msg; |
| 27 | |
| 28 | #define OP_BOOTREQUEST 1 |
| 29 | #define OP_BOOTREPLY 2 |
| 30 | |
| 31 | #define FLAGS_BROADCAST 0x8000 |
| 32 | |
| 33 | #define HTYPE_ETHER 1 |
| 34 | |
| 35 | struct dhcp_msg |
| 36 | { |
| 37 | uint8_t op; /* BOOTREQUEST / BOOTREPLY */ |
| 38 | uint8_t htype; /* hw addr type */ |
| 39 | uint8_t hlen; /* hw addr len */ |
| 40 | uint8_t hops; /* client set to 0 */ |
| 41 | |
| 42 | uint32_t xid; /* transaction id */ |
| 43 | |
| 44 | uint16_t secs; /* seconds since start of acq */ |
| 45 | uint16_t flags; |
| 46 | |
| 47 | uint32_t ciaddr; /* client IP addr */ |
| 48 | uint32_t yiaddr; /* your (client) IP addr */ |
| 49 | uint32_t siaddr; /* ip addr of next server */ |
| 50 | /* (DHCPOFFER and DHCPACK) */ |
| 51 | uint32_t giaddr; /* relay agent IP addr */ |
| 52 | |
| 53 | uint8_t chaddr[16]; /* client hw addr */ |
| 54 | char sname[64]; /* asciiz server hostname */ |
| 55 | char file[128]; /* asciiz boot file name */ |
| 56 | |
| 57 | uint8_t options[1024]; /* optional parameters */ |
| 58 | }; |
| 59 | |
| 60 | #define DHCP_MSG_FIXED_SIZE 236 |
| 61 | |
| 62 | /* first four bytes of options are a cookie to indicate that |
| 63 | ** the payload are DHCP options as opposed to some other BOOTP |
| 64 | ** extension. |
| 65 | */ |
| 66 | #define OPT_COOKIE1 0x63 |
| 67 | #define OPT_COOKIE2 0x82 |
| 68 | #define OPT_COOKIE3 0x53 |
| 69 | #define OPT_COOKIE4 0x63 |
| 70 | |
| 71 | /* BOOTP/DHCP options - see RFC 2132 */ |
| 72 | #define OPT_PAD 0 |
| 73 | |
| 74 | #define OPT_SUBNET_MASK 1 /* 4 <ipaddr> */ |
| 75 | #define OPT_TIME_OFFSET 2 /* 4 <seconds> */ |
| 76 | #define OPT_GATEWAY 3 /* 4*n <ipaddr> * n */ |
| 77 | #define OPT_DNS 6 /* 4*n <ipaddr> * n */ |
| 78 | #define OPT_DOMAIN_NAME 15 /* n <domainnamestring> */ |
| 79 | #define OPT_BROADCAST_ADDR 28 /* 4 <ipaddr> */ |
| 80 | |
| 81 | #define OPT_REQUESTED_IP 50 /* 4 <ipaddr> */ |
| 82 | #define OPT_LEASE_TIME 51 /* 4 <seconds> */ |
| 83 | #define OPT_MESSAGE_TYPE 53 /* 1 <msgtype> */ |
| 84 | #define OPT_SERVER_ID 54 /* 4 <ipaddr> */ |
| 85 | #define OPT_PARAMETER_LIST 55 /* n <optcode> * n */ |
| 86 | #define OPT_MESSAGE 56 /* n <errorstring> */ |
| 87 | #define OPT_CLASS_ID 60 /* n <opaque> */ |
| 88 | #define OPT_CLIENT_ID 61 /* n <opaque> */ |
| 89 | #define OPT_END 255 |
| 90 | |
| 91 | /* DHCP message types */ |
| 92 | #define DHCPDISCOVER 1 |
| 93 | #define DHCPOFFER 2 |
| 94 | #define DHCPREQUEST 3 |
| 95 | #define DHCPDECLINE 4 |
| 96 | #define DHCPACK 5 |
| 97 | #define DHCPNAK 6 |
| 98 | #define DHCPRELEASE 7 |
| 99 | #define DHCPINFORM 8 |
| 100 | |
| 101 | int init_dhcp_discover_msg(dhcp_msg *msg, void *hwaddr, uint32_t xid); |
| 102 | |
| 103 | int init_dhcp_request_msg(dhcp_msg *msg, void *hwaddr, uint32_t xid, |
| 104 | uint32_t ipaddr, uint32_t serveraddr); |
| 105 | |
| 106 | #endif |