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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/**
* Copyright (C) 2012-2013 Steven Barth <steven@midlink.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#pragma once
#include <netinet/in.h>
#include <netinet/icmp6.h>
#include <netinet/ether.h>
#include <net/if.h>
#include <stdbool.h>
#include <syslog.h>
#include "libubox/blobmsg.h"
#ifndef typeof
#define typeof __typeof
#endif
#ifndef container_of
#define container_of(ptr, type, member) ( \
(type *)( (char *)ptr - offsetof(type,member) ))
#endif
#include "libubox/list.h"
#include "libubox/uloop.h"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
// RFC 6106 defines this router advertisement option
#define ND_OPT_ROUTE_INFO 24
#define ND_OPT_RECURSIVE_DNS 25
#define ND_OPT_DNS_SEARCH 31
#define RELAYD_BUFFER_SIZE 8192
#define RELAYD_MAX_PREFIXES 8
#define INFINITE_VALID(x) ((x) == 0)
#define _unused __attribute__((unused))
#define _packed __attribute__((packed))
#define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
#define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
struct interface;
extern struct list_head leases;
struct odhcpd_event {
struct uloop_fd uloop;
void (*handle_dgram)(void *addr, void *data, size_t len,
struct interface *iface, void *dest_addr);
void (*handle_error)(int error);
};
struct odhcpd_ipaddr {
struct in6_addr addr;
uint8_t prefix;
uint8_t dprefix;
uint32_t preferred;
uint32_t valid;
};
enum odhcpd_mode {
RELAYD_DISABLED,
RELAYD_SERVER,
RELAYD_RELAY,
RELAYD_HYBRID
};
struct config {
bool legacy;
char *dhcp_cb;
char *dhcp_statefile;
} config;
struct lease {
struct list_head head;
struct in_addr ipaddr;
uint32_t hostid;
struct ether_addr mac;
uint16_t duid_len;
uint8_t *duid;
uint32_t dhcpv4_leasetime;
char hostname[];
};
struct interface {
struct list_head head;
int ifindex;
char ifname[IF_NAMESIZE];
char name[IF_NAMESIZE];
// Runtime data
struct uloop_timeout timer_rs;
struct list_head ia_assignments;
struct odhcpd_ipaddr ia_addr[8];
size_t ia_addr_len;
bool ia_reconf;
// DHCPv4
struct odhcpd_event dhcpv6_event;
struct odhcpd_event dhcpv4_event;
struct odhcpd_event ndp_event;
struct list_head dhcpv4_assignments;
// Managed PD
char dhcpv6_pd_manager[128];
struct in6_addr dhcpv6_pd_cer;
// Services
enum odhcpd_mode ra;
enum odhcpd_mode dhcpv6;
enum odhcpd_mode ndp;
enum odhcpd_mode dhcpv4;
// Config
bool inuse;
bool external;
bool master;
bool ignore;
bool always_rewrite_dns;
bool ra_not_onlink;
bool ra_advrouter;
bool no_dynamic_dhcp;
int learn_routes;
int default_router;
int managed;
int route_preference;
int ra_maxinterval;
// DHCPv4
struct in_addr dhcpv4_start;
struct in_addr dhcpv4_end;
struct in_addr *dhcpv4_router;
size_t dhcpv4_router_cnt;
struct in_addr *dhcpv4_dns;
size_t dhcpv4_dns_cnt;
uint32_t dhcpv4_leasetime;
// DNS
struct in6_addr *dns;
size_t dns_cnt;
uint8_t *search;
size_t search_len;
void *dhcpv6_raw;
size_t dhcpv6_raw_len;
char *upstream;
size_t upstream_len;
char *filter_class;
};
extern struct list_head interfaces;
#define RELAYD_MANAGED_MFLAG 1
#define RELAYD_MANAGED_NO_AFLAG 2
// Exported main functions
int odhcpd_open_rtnl(void);
int odhcpd_register(struct odhcpd_event *event);
void odhcpd_process(struct odhcpd_event *event);
ssize_t odhcpd_send(int socket, struct sockaddr_in6 *dest,
struct iovec *iov, size_t iov_len,
const struct interface *iface);
ssize_t odhcpd_get_interface_addresses(int ifindex,
struct odhcpd_ipaddr *addrs, size_t cnt);
int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr);
struct interface* odhcpd_get_interface_by_name(const char *name);
int odhcpd_get_interface_config(const char *ifname, const char *what);
int odhcpd_get_mac(const struct interface *iface, uint8_t mac[6]);
struct interface* odhcpd_get_interface_by_index(int ifindex);
struct interface* odhcpd_get_master_interface(void);
int odhcpd_urandom(void *data, size_t len);
void odhcpd_setup_route(const struct in6_addr *addr, int prefixlen,
const struct interface *iface, const struct in6_addr *gw,
int metric, bool add);
void odhcpd_run(void);
time_t odhcpd_time(void);
ssize_t odhcpd_unhexlify(uint8_t *dst, size_t len, const char *src);
void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len);
int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits);
void odhcpd_bmemcpy(void *av, const void *bv, size_t bits);
int config_parse_interface(void *data, size_t len, const char *iname, bool overwrite);
#ifdef WITH_UBUS
int init_ubus(void);
const char* ubus_get_ifname(const char *name);
void ubus_apply_network(void);
bool ubus_has_prefix(const char *name, const char *ifname);
#endif
// Exported module initializers
int init_router(void);
int init_dhcpv6(void);
int init_dhcpv4(void);
int init_ndp(void);
int setup_router_interface(struct interface *iface, bool enable);
int setup_dhcpv6_interface(struct interface *iface, bool enable);
int setup_ndp_interface(struct interface *iface, bool enable);
int setup_dhcpv4_interface(struct interface *iface, bool enable);
void odhcpd_reload(void);
|
