1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2011 Denys Vlasenko.
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#ifndef UDHCP_D6_COMMON_H
#define UDHCP_D6_COMMON_H 1
#include <netinet/ip6.h>
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
/*** DHCPv6 packet ***/
/* DHCPv6 protocol. See RFC 3315 */
#define D6_MSG_SOLICIT 1
#define D6_MSG_ADVERTISE 2
#define D6_MSG_REQUEST 3
#define D6_MSG_CONFIRM 4
#define D6_MSG_RENEW 5
#define D6_MSG_REBIND 6
#define D6_MSG_REPLY 7
#define D6_MSG_RELEASE 8
#define D6_MSG_DECLINE 9
#define D6_MSG_RECONFIGURE 10
#define D6_MSG_INFORMATION_REQUEST 11
#define D6_MSG_RELAY_FORW 12
#define D6_MSG_RELAY_REPL 13
struct d6_packet {
union {
uint8_t d6_msg_type;
uint32_t d6_xid32;
} d6_u;
uint8_t d6_options[576 - sizeof(struct ip6_hdr) - sizeof(struct udphdr) - 4
+ CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS];
} PACKED;
#define d6_msg_type d6_u.d6_msg_type
#define d6_xid32 d6_u.d6_xid32
struct ip6_udp_d6_packet {
struct ip6_hdr ip6;
struct udphdr udp;
struct d6_packet data;
} PACKED;
struct udp_d6_packet {
struct udphdr udp;
struct d6_packet data;
} PACKED;
/*** Options ***/
struct d6_option {
uint8_t code_hi;
uint8_t code;
uint8_t len_hi;
uint8_t len;
uint8_t data[1];
} PACKED;
#define D6_OPT_CLIENTID 1
#define D6_OPT_SERVERID 2
#define D6_OPT_IA_NA 3
#define D6_OPT_IA_TA 4
#define D6_OPT_IAADDR 5
#define D6_OPT_ORO 6
#define D6_OPT_PREFERENCE 7
#define D6_OPT_ELAPSED_TIME 8
#define D6_OPT_RELAY_MSG 9
#define D6_OPT_AUTH 11
#define D6_OPT_UNICAST 12
#define D6_OPT_STATUS_CODE 13
#define D6_OPT_RAPID_COMMIT 14
#define D6_OPT_USER_CLASS 15
#define D6_OPT_VENDOR_CLASS 16
#define D6_OPT_VENDOR_OPTS 17
#define D6_OPT_INTERFACE_ID 18
#define D6_OPT_RECONF_MSG 19
#define D6_OPT_RECONF_ACCEPT 20
#define D6_OPT_DNS_SERVERS 23
#define D6_OPT_DOMAIN_LIST 24
#define D6_OPT_IA_PD 25
#define D6_OPT_IAPREFIX 26
/* RFC 4704 "The DHCPv6 Client FQDN Option"
* uint16 option-code OPTION_CLIENT_FQDN (39)
* uint16 option-len 1 + length of domain name
* uint8 flags
* char[] domain-name partial or fully qualified domain name
*
* Flags format is |MBZ|N|O|S|
* The "S" bit indicates whether the server SHOULD or SHOULD NOT perform
* the AAAA RR (FQDN-to-address) DNS updates. A client sets the bit to
* 0 to indicate that the server SHOULD NOT perform the updates and 1 to
* indicate that the server SHOULD perform the updates. The state of
* the bit in the reply from the server indicates the action to be taken
* by the server; if it is 1, the server has taken responsibility for
* AAAA RR updates for the FQDN.
* The "O" bit indicates whether the server has overridden the client's
* preference for the "S" bit. A client MUST set this bit to 0. A
* server MUST set this bit to 1 if the "S" bit in its reply to the
* client does not match the "S" bit received from the client.
* The "N" bit indicates whether the server SHOULD NOT perform any DNS
* updates. A client sets this bit to 0 to request that the server
* SHOULD perform updates (the PTR RR and possibly the AAAA RR based on
* the "S" bit) or to 1 to request that the server SHOULD NOT perform
* any DNS updates. A server sets the "N" bit to indicate whether the
* server SHALL (0) or SHALL NOT (1) perform DNS updates. If the "N"
* bit is 1, the "S" bit MUST be 0.
*
* If a client knows only part of its name, it MAY send a name that is not
* fully qualified, indicating that it knows part of the name but does not
* necessarily know the zone in which the name is to be embedded.
* To send a fully qualified domain name, the Domain Name field is set
* to the DNS-encoded domain name including the terminating zero-length
* label. To send a partial name, the Domain Name field is set to the
* DNS-encoded domain name without the terminating zero-length label.
* A client MAY also leave the Domain Name field empty if it desires the
* server to provide a name.
*/
#define D6_OPT_CLIENT_FQDN 39
#define D6_OPT_TZ_POSIX 41
#define D6_OPT_TZ_NAME 42
#define D6_OPT_BOOT_URL 59
#define D6_OPT_BOOT_PARAM 60
/*** Other shared functions ***/
struct client6_data_t {
struct d6_option *server_id;
struct d6_option *ia_na;
struct d6_option *ia_pd;
char **env_ptr;
unsigned env_idx;
/* link-local IPv6 address */
struct in6_addr ll_ip6;
} FIX_ALIASING;
#define client6_data (*(struct client6_data_t*)(&bb_common_bufsiz1[COMMON_BUFSIZE - sizeof(struct client6_data_t)]))
int FAST_FUNC d6_read_interface(
const char *interface,
int *ifindex,
struct in6_addr *nip6,
uint8_t *mac
);
int FAST_FUNC d6_listen_socket(int port, const char *inf);
int FAST_FUNC d6_recv_kernel_packet(
struct in6_addr *peer_ipv6,
struct d6_packet *packet, int fd
);
int FAST_FUNC d6_send_raw_packet(
struct d6_packet *d6_pkt, unsigned d6_pkt_size,
struct in6_addr *src_ipv6, int source_port,
struct in6_addr *dst_ipv6, int dest_port, const uint8_t *dest_arp,
int ifindex
);
int FAST_FUNC d6_send_kernel_packet(
struct d6_packet *d6_pkt, unsigned d6_pkt_size,
struct in6_addr *src_ipv6, int source_port,
struct in6_addr *dst_ipv6, int dest_port,
int ifindex
);
#if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 2
void FAST_FUNC d6_dump_packet(struct d6_packet *packet);
#else
# define d6_dump_packet(packet) ((void)0)
#endif
POP_SAVED_FUNCTION_VISIBILITY
#endif
|
