1 /*
2 * inet6 interface/address list definitions
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <pedro_m@yahoo.com>
7 *
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
13 */
14
15 #ifndef _NET_IF_INET6_H
16 #define _NET_IF_INET6_H
17
18 #include <linux/ipv6.h>
19
20 #define IF_RA_OTHERCONF 0x80
21 #define IF_RA_MANAGED 0x40
22 #define IF_RA_RCVD 0x20
23 #define IF_RS_SENT 0x10
24
25 #ifdef __KERNEL__
26
27 struct inet6_ifaddr
28 {
29 struct in6_addr addr;
30 __u32 prefix_len;
31
32 __u32 valid_lft;
33 __u32 prefered_lft;
34 unsigned long tstamp;
35 atomic_t refcnt;
36 spinlock_t lock;
37
38 __u8 probes;
39 __u8 flags;
40
41 __u16 scope;
42
43 struct timer_list timer;
44
45 struct inet6_dev *idev;
46
47 struct inet6_ifaddr *lst_next; /* next addr in addr_lst */
48 struct inet6_ifaddr *if_next; /* next addr in inet6_dev */
49
50 int dead;
51 };
52
53 struct ip6_sf_socklist
54 {
55 unsigned int sl_max;
56 unsigned int sl_count;
57 struct in6_addr sl_addr[0];
58 };
59
60 #define IP6_SFLSIZE(count) (sizeof(struct ip6_sf_socklist) + \
61 (count) * sizeof(struct in6_addr))
62
63 #define IP6_SFBLOCK 10 /* allocate this many at once */
64
65 struct ipv6_mc_socklist
66 {
67 struct in6_addr addr;
68 int ifindex;
69 struct ipv6_mc_socklist *next;
70 unsigned int sfmode; /* MCAST_{INCLUDE,EXCLUDE} */
71 struct ip6_sf_socklist *sflist;
72 };
73
74 struct ip6_sf_list
75 {
76 struct ip6_sf_list *sf_next;
77 struct in6_addr sf_addr;
78 unsigned long sf_count[2]; /* include/exclude counts */
79 unsigned char sf_gsresp; /* include in g & s response? */
80 unsigned char sf_oldin; /* change state */
81 unsigned char sf_crcount; /* retrans. left to send */
82 };
83
84 #define MAF_TIMER_RUNNING 0x01
85 #define MAF_LAST_REPORTER 0x02
86 #define MAF_LOADED 0x04
87 #define MAF_NOREPORT 0x08
88 #define MAF_GSQUERY 0x10
89
90 struct ifmcaddr6
91 {
92 struct in6_addr mca_addr;
93 struct inet6_dev *idev;
94 struct ifmcaddr6 *next;
95 struct ip6_sf_list *mca_sources;
96 struct ip6_sf_list *mca_tomb;
97 unsigned int mca_sfmode;
98 unsigned long mca_sfcount[2];
99 struct timer_list mca_timer;
100 unsigned mca_flags;
101 int mca_users;
102 atomic_t mca_refcnt;
103 spinlock_t mca_lock;
104 unsigned char mca_crcount;
105 };
106
107 /* Anycast stuff */
108
109 struct ipv6_ac_socklist
110 {
111 struct in6_addr acl_addr;
112 int acl_ifindex;
113 struct ipv6_ac_socklist *acl_next;
114 };
115
116 struct ifacaddr6
117 {
118 struct in6_addr aca_addr;
119 struct inet6_dev *aca_idev;
120 struct ifacaddr6 *aca_next;
121 int aca_users;
122 atomic_t aca_refcnt;
123 spinlock_t aca_lock;
124 };
125
126 #define IFA_HOST IPV6_ADDR_LOOPBACK
127 #define IFA_LINK IPV6_ADDR_LINKLOCAL
128 #define IFA_SITE IPV6_ADDR_SITELOCAL
129 #define IFA_GLOBAL 0x0000U
130
131 struct inet6_dev
132 {
133 struct net_device *dev;
134
135 struct inet6_ifaddr *addr_list;
136
137 struct ifmcaddr6 *mc_list;
138 struct ifmcaddr6 *mc_tomb;
139 rwlock_t mc_lock;
140 unsigned long mc_v1_seen;
141 unsigned long mc_maxdelay;
142 unsigned char mc_qrv;
143 unsigned char mc_gq_running;
144 unsigned char mc_ifc_count;
145 struct timer_list mc_gq_timer; /* general query timer */
146 struct timer_list mc_ifc_timer; /* interface change timer */
147
148 struct ifacaddr6 *ac_list;
149 rwlock_t lock;
150 atomic_t refcnt;
151 __u32 if_flags;
152 int dead;
153
154 struct neigh_parms *nd_parms;
155 struct inet6_dev *next;
156 struct ipv6_devconf cnf;
157 };
158
159 extern struct ipv6_devconf ipv6_devconf;
160
ipv6_eth_mc_map(struct in6_addr * addr,char * buf)161 static inline void ipv6_eth_mc_map(struct in6_addr *addr, char *buf)
162 {
163 /*
164 * +-------+-------+-------+-------+-------+-------+
165 * | 33 | 33 | DST13 | DST14 | DST15 | DST16 |
166 * +-------+-------+-------+-------+-------+-------+
167 */
168
169 buf[0]= 0x33;
170 buf[1]= 0x33;
171
172 memcpy(buf + 2, &addr->s6_addr32[3], sizeof(__u32));
173 }
174
ipv6_tr_mc_map(struct in6_addr * addr,char * buf)175 static inline void ipv6_tr_mc_map(struct in6_addr *addr, char *buf)
176 {
177 /* All nodes FF01::1, FF02::1, FF02::1:FFxx:xxxx */
178
179 if (((addr->s6_addr[0] == 0xFF) &&
180 ((addr->s6_addr[1] == 0x01) || (addr->s6_addr[1] == 0x02)) &&
181 (addr->s6_addr16[1] == 0) &&
182 (addr->s6_addr32[1] == 0) &&
183 (addr->s6_addr32[2] == 0) &&
184 (addr->s6_addr16[6] == 0) &&
185 (addr->s6_addr[15] == 1)) ||
186 ((addr->s6_addr[0] == 0xFF) &&
187 (addr->s6_addr[1] == 0x02) &&
188 (addr->s6_addr16[1] == 0) &&
189 (addr->s6_addr32[1] == 0) &&
190 (addr->s6_addr16[4] == 0) &&
191 (addr->s6_addr[10] == 0) &&
192 (addr->s6_addr[11] == 1) &&
193 (addr->s6_addr[12] == 0xff)))
194 {
195 buf[0]=0xC0;
196 buf[1]=0x00;
197 buf[2]=0x01;
198 buf[3]=0x00;
199 buf[4]=0x00;
200 buf[5]=0x00;
201 /* All routers FF0x::2 */
202 } else if ((addr->s6_addr[0] ==0xff) &&
203 ((addr->s6_addr[1] & 0xF0) == 0) &&
204 (addr->s6_addr16[1] == 0) &&
205 (addr->s6_addr32[1] == 0) &&
206 (addr->s6_addr32[2] == 0) &&
207 (addr->s6_addr16[6] == 0) &&
208 (addr->s6_addr[15] == 2))
209 {
210 buf[0]=0xC0;
211 buf[1]=0x00;
212 buf[2]=0x02;
213 buf[3]=0x00;
214 buf[4]=0x00;
215 buf[5]=0x00;
216 } else {
217 unsigned char i ;
218
219 i = addr->s6_addr[15] & 7 ;
220 buf[0]=0xC0;
221 buf[1]=0x00;
222 buf[2]=0x00;
223 buf[3]=0x01 << i ;
224 buf[4]=0x00;
225 buf[5]=0x00;
226 }
227 }
228
ipv6_arcnet_mc_map(const struct in6_addr * addr,char * buf)229 static inline void ipv6_arcnet_mc_map(const struct in6_addr *addr, char *buf)
230 {
231 buf[0] = 0x00;
232 }
233 #endif
234 #endif
235