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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
5f404b1e PF |
2 | #pragma once |
3 | ||
4 | /*** | |
5 | This file is part of systemd. | |
6 | ||
7 | Copyright (C) 2013 Intel Corporation. All rights reserved. | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
5f404b1e | 23 | #include <netinet/ip.h> |
71d35b6b | 24 | #include <netinet/udp.h> |
5f404b1e PF |
25 | #include <stdint.h> |
26 | ||
27 | #include "macro.h" | |
28 | #include "sparse-endian.h" | |
29 | ||
30 | struct DHCPMessage { | |
31 | uint8_t op; | |
32 | uint8_t htype; | |
33 | uint8_t hlen; | |
34 | uint8_t hops; | |
35 | be32_t xid; | |
36 | be16_t secs; | |
37 | be16_t flags; | |
3b349af6 PF |
38 | be32_t ciaddr; |
39 | be32_t yiaddr; | |
40 | be32_t siaddr; | |
41 | be32_t giaddr; | |
5f404b1e PF |
42 | uint8_t chaddr[16]; |
43 | uint8_t sname[64]; | |
44 | uint8_t file[128]; | |
3b7ca119 | 45 | be32_t magic; |
20b958bf | 46 | uint8_t options[0]; |
5f404b1e PF |
47 | } _packed_; |
48 | ||
49 | typedef struct DHCPMessage DHCPMessage; | |
50 | ||
51 | struct DHCPPacket { | |
52 | struct iphdr ip; | |
53 | struct udphdr udp; | |
54 | DHCPMessage dhcp; | |
55 | } _packed_; | |
56 | ||
57 | typedef struct DHCPPacket DHCPPacket; | |
58 | ||
8c00042c PF |
59 | #define DHCP_IP_SIZE (int32_t)(sizeof(struct iphdr)) |
60 | #define DHCP_IP_UDP_SIZE (int32_t)(sizeof(struct udphdr) + DHCP_IP_SIZE) | |
61 | #define DHCP_MESSAGE_SIZE (int32_t)(sizeof(DHCPMessage)) | |
324f8187 | 62 | #define DHCP_DEFAULT_MIN_SIZE 576 /* the minimum internet hosts must be able to receive */ |
671eaa74 | 63 | #define DHCP_MIN_OPTIONS_SIZE (DHCP_DEFAULT_MIN_SIZE - DHCP_IP_UDP_SIZE - DHCP_MESSAGE_SIZE) |
3b7ca119 | 64 | #define DHCP_MAGIC_COOKIE (uint32_t)(0x63825363) |
8c00042c | 65 | |
46a66b79 PF |
66 | enum { |
67 | DHCP_PORT_SERVER = 67, | |
68 | DHCP_PORT_CLIENT = 68, | |
69 | }; | |
70 | ||
5f404b1e PF |
71 | enum DHCPState { |
72 | DHCP_STATE_INIT = 0, | |
73 | DHCP_STATE_SELECTING = 1, | |
74 | DHCP_STATE_INIT_REBOOT = 2, | |
75 | DHCP_STATE_REBOOTING = 3, | |
76 | DHCP_STATE_REQUESTING = 4, | |
77 | DHCP_STATE_BOUND = 5, | |
78 | DHCP_STATE_RENEWING = 6, | |
79 | DHCP_STATE_REBINDING = 7, | |
781ca7a1 | 80 | DHCP_STATE_STOPPED = 8, |
5f404b1e PF |
81 | }; |
82 | ||
83 | typedef enum DHCPState DHCPState; | |
84 | ||
85 | enum { | |
86 | BOOTREQUEST = 1, | |
87 | BOOTREPLY = 2, | |
88 | }; | |
89 | ||
90 | enum { | |
91 | DHCP_DISCOVER = 1, | |
92 | DHCP_OFFER = 2, | |
93 | DHCP_REQUEST = 3, | |
94 | DHCP_DECLINE = 4, | |
95 | DHCP_ACK = 5, | |
96 | DHCP_NAK = 6, | |
97 | DHCP_RELEASE = 7, | |
615c1467 TG |
98 | DHCP_INFORM = 8, |
99 | DHCP_FORCERENEW = 9, | |
5f404b1e PF |
100 | }; |
101 | ||
102 | enum { | |
103 | DHCP_OVERLOAD_FILE = 1, | |
104 | DHCP_OVERLOAD_SNAME = 2, | |
105 | }; | |
106 | ||
23873e25 BG |
107 | #define DHCP_MAX_FQDN_LENGTH 255 |
108 | ||
109 | enum { | |
110 | DHCP_FQDN_FLAG_S = (1 << 0), | |
111 | DHCP_FQDN_FLAG_O = (1 << 1), | |
112 | DHCP_FQDN_FLAG_E = (1 << 2), | |
113 | DHCP_FQDN_FLAG_N = (1 << 3), | |
114 | }; |