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1da177e4 LT |
1 | #ifndef _NET_IP6_ROUTE_H |
2 | #define _NET_IP6_ROUTE_H | |
3 | ||
70ceb4f5 YH |
4 | struct route_info { |
5 | __u8 type; | |
6 | __u8 length; | |
7 | __u8 prefix_len; | |
8 | #if defined(__BIG_ENDIAN_BITFIELD) | |
9 | __u8 reserved_h:3, | |
10 | route_pref:2, | |
11 | reserved_l:3; | |
12 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
13 | __u8 reserved_l:3, | |
14 | route_pref:2, | |
15 | reserved_h:3; | |
16 | #endif | |
e69a4adc | 17 | __be32 lifetime; |
70ceb4f5 YH |
18 | __u8 prefix[0]; /* 0,8 or 16 */ |
19 | }; | |
20 | ||
1da177e4 LT |
21 | #include <net/flow.h> |
22 | #include <net/ip6_fib.h> | |
23 | #include <net/sock.h> | |
1da177e4 LT |
24 | #include <linux/ip.h> |
25 | #include <linux/ipv6.h> | |
9bb5a148 | 26 | #include <linux/route.h> |
1da177e4 | 27 | |
7cbca67c YH |
28 | #define RT6_LOOKUP_F_IFACE 0x00000001 |
29 | #define RT6_LOOKUP_F_REACHABLE 0x00000002 | |
30 | #define RT6_LOOKUP_F_HAS_SADDR 0x00000004 | |
31 | #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008 | |
32 | #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010 | |
33 | #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020 | |
77d16f45 | 34 | |
30f78d8e ED |
35 | /* We do not (yet ?) support IPv6 jumbograms (RFC 2675) |
36 | * Unlike IPv4, hdr->seg_len doesn't include the IPv6 header | |
37 | */ | |
38 | #define IP6_MAX_MTU (0xFFFF + sizeof(struct ipv6hdr)) | |
39 | ||
0c9a2ac1 YH |
40 | /* |
41 | * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate | |
42 | * between IPV6_ADDR_PREFERENCES socket option values | |
43 | * IPV6_PREFER_SRC_TMP = 0x1 | |
44 | * IPV6_PREFER_SRC_PUBLIC = 0x2 | |
45 | * IPV6_PREFER_SRC_COA = 0x4 | |
46 | * and above RT6_LOOKUP_F_SRCPREF_xxx flags. | |
47 | */ | |
48 | static inline int rt6_srcprefs2flags(unsigned int srcprefs) | |
49 | { | |
50 | /* No need to bitmask because srcprefs have only 3 bits. */ | |
51 | return srcprefs << 3; | |
52 | } | |
53 | ||
54 | static inline unsigned int rt6_flags2srcprefs(int flags) | |
55 | { | |
56 | return (flags >> 3) & 7; | |
57 | } | |
1da177e4 | 58 | |
60ea37f7 WY |
59 | static inline bool rt6_need_strict(const struct in6_addr *daddr) |
60 | { | |
61 | return ipv6_addr_type(daddr) & | |
62 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
63 | } | |
fbfe95a4 | 64 | |
5c3a0fd7 | 65 | void ip6_route_input(struct sk_buff *skb); |
1da177e4 | 66 | |
6f21c96a PA |
67 | struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk, |
68 | struct flowi6 *fl6, int flags); | |
69 | ||
70 | static inline struct dst_entry *ip6_route_output(struct net *net, | |
71 | const struct sock *sk, | |
72 | struct flowi6 *fl6) | |
73 | { | |
74 | return ip6_route_output_flags(net, sk, fl6, 0); | |
75 | } | |
76 | ||
5c3a0fd7 JP |
77 | struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
78 | int flags); | |
9ff74384 DA |
79 | struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, |
80 | int ifindex, struct flowi6 *fl6, int flags); | |
1da177e4 | 81 | |
5c3a0fd7 JP |
82 | int ip6_route_init(void); |
83 | void ip6_route_cleanup(void); | |
1da177e4 | 84 | |
5c3a0fd7 | 85 | int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg); |
1da177e4 | 86 | |
5c3a0fd7 JP |
87 | int ip6_route_add(struct fib6_config *cfg); |
88 | int ip6_ins_rt(struct rt6_info *); | |
89 | int ip6_del_rt(struct rt6_info *); | |
1da177e4 | 90 | |
5c3a0fd7 JP |
91 | int ip6_route_get_saddr(struct net *net, struct rt6_info *rt, |
92 | const struct in6_addr *daddr, unsigned int prefs, | |
93 | struct in6_addr *saddr); | |
c3968a85 | 94 | |
5c3a0fd7 JP |
95 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
96 | const struct in6_addr *saddr, int oif, int flags); | |
1da177e4 | 97 | |
5c3a0fd7 JP |
98 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6); |
99 | int icmp6_dst_gc(void); | |
3b00944c | 100 | |
5c3a0fd7 | 101 | void fib6_force_start_gc(struct net *net); |
1da177e4 | 102 | |
5c3a0fd7 JP |
103 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
104 | const struct in6_addr *addr, bool anycast); | |
1da177e4 | 105 | |
9ab179d8 DA |
106 | struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev, |
107 | int flags); | |
108 | ||
1da177e4 LT |
109 | /* |
110 | * support functions for ND | |
111 | * | |
112 | */ | |
5c3a0fd7 JP |
113 | struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, |
114 | struct net_device *dev); | |
115 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, | |
116 | struct net_device *dev, unsigned int pref); | |
117 | ||
118 | void rt6_purge_dflt_routers(struct net *net); | |
119 | ||
120 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, | |
121 | const struct in6_addr *gwaddr); | |
122 | ||
123 | void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif, | |
124 | u32 mark); | |
125 | void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu); | |
126 | void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark); | |
127 | void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, | |
128 | u32 mark); | |
129 | void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk); | |
1da177e4 | 130 | |
1da177e4 | 131 | struct netlink_callback; |
1da177e4 | 132 | |
fd2c3ef7 | 133 | struct rt6_rtnl_dump_arg { |
1b43af54 PM |
134 | struct sk_buff *skb; |
135 | struct netlink_callback *cb; | |
191cd582 | 136 | struct net *net; |
1b43af54 PM |
137 | }; |
138 | ||
5c3a0fd7 JP |
139 | int rt6_dump_route(struct rt6_info *rt, void *p_arg); |
140 | void rt6_ifdown(struct net *net, struct net_device *dev); | |
141 | void rt6_mtu_change(struct net_device *dev, unsigned int mtu); | |
142 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); | |
be7a010d | 143 | void rt6_clean_tohost(struct net *net, struct in6_addr *gateway); |
1da177e4 | 144 | |
1da177e4 LT |
145 | |
146 | /* | |
147 | * Store a destination cache entry in a socket | |
148 | */ | |
6bd4f355 ED |
149 | static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, |
150 | const struct in6_addr *daddr, | |
151 | const struct in6_addr *saddr) | |
1da177e4 LT |
152 | { |
153 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1da177e4 | 154 | |
6bd4f355 | 155 | np->dst_cookie = rt6_get_cookie((struct rt6_info *)dst); |
f83ef8c0 | 156 | sk_setup_caps(sk, dst); |
1da177e4 | 157 | np->daddr_cache = daddr; |
8e1ef0a9 YH |
158 | #ifdef CONFIG_IPV6_SUBTREES |
159 | np->saddr_cache = saddr; | |
160 | #endif | |
1da177e4 LT |
161 | } |
162 | ||
a50feda5 | 163 | static inline bool ipv6_unicast_destination(const struct sk_buff *skb) |
1da177e4 | 164 | { |
adf30907 | 165 | struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); |
1da177e4 LT |
166 | |
167 | return rt->rt6i_flags & RTF_LOCAL; | |
168 | } | |
169 | ||
2647a9b0 MKL |
170 | static inline bool ipv6_anycast_destination(const struct dst_entry *dst, |
171 | const struct in6_addr *daddr) | |
509aba3b | 172 | { |
2647a9b0 | 173 | struct rt6_info *rt = (struct rt6_info *)dst; |
509aba3b | 174 | |
2647a9b0 MKL |
175 | return rt->rt6i_flags & RTF_ANYCAST || |
176 | (rt->rt6i_dst.plen != 128 && | |
177 | ipv6_addr_equal(&rt->rt6i_dst.addr, daddr)); | |
509aba3b FLB |
178 | } |
179 | ||
7d8c6e39 EB |
180 | int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb, |
181 | int (*output)(struct net *, struct sock *, struct sk_buff *)); | |
ad0081e4 DS |
182 | |
183 | static inline int ip6_skb_dst_mtu(struct sk_buff *skb) | |
184 | { | |
f60e5990 | 185 | struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ? |
186 | inet6_sk(skb->sk) : NULL; | |
ad0081e4 | 187 | |
93b36cf3 | 188 | return (np && np->pmtudisc >= IPV6_PMTUDISC_PROBE) ? |
ad0081e4 DS |
189 | skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); |
190 | } | |
191 | ||
93b36cf3 HFS |
192 | static inline bool ip6_sk_accept_pmtu(const struct sock *sk) |
193 | { | |
0b95227a HFS |
194 | return inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_INTERFACE && |
195 | inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_OMIT; | |
196 | } | |
197 | ||
60ff7467 | 198 | static inline bool ip6_sk_ignore_df(const struct sock *sk) |
0b95227a HFS |
199 | { |
200 | return inet6_sk(sk)->pmtudisc < IPV6_PMTUDISC_DO || | |
201 | inet6_sk(sk)->pmtudisc == IPV6_PMTUDISC_OMIT; | |
93b36cf3 HFS |
202 | } |
203 | ||
2647a9b0 MKL |
204 | static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt, |
205 | struct in6_addr *daddr) | |
9bb5a148 | 206 | { |
2647a9b0 MKL |
207 | if (rt->rt6i_flags & RTF_GATEWAY) |
208 | return &rt->rt6i_gateway; | |
45e4fd26 | 209 | else if (unlikely(rt->rt6i_flags & RTF_CACHE)) |
2647a9b0 MKL |
210 | return &rt->rt6i_dst.addr; |
211 | else | |
212 | return daddr; | |
9bb5a148 YH |
213 | } |
214 | ||
1da177e4 | 215 | #endif |