Commit | Line | Data |
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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 | ||
a2e2ff56 | 21 | #include <net/addrconf.h> |
1da177e4 LT |
22 | #include <net/flow.h> |
23 | #include <net/ip6_fib.h> | |
24 | #include <net/sock.h> | |
1da177e4 LT |
25 | #include <linux/ip.h> |
26 | #include <linux/ipv6.h> | |
9bb5a148 | 27 | #include <linux/route.h> |
1da177e4 | 28 | |
7cbca67c YH |
29 | #define RT6_LOOKUP_F_IFACE 0x00000001 |
30 | #define RT6_LOOKUP_F_REACHABLE 0x00000002 | |
31 | #define RT6_LOOKUP_F_HAS_SADDR 0x00000004 | |
32 | #define RT6_LOOKUP_F_SRCPREF_TMP 0x00000008 | |
33 | #define RT6_LOOKUP_F_SRCPREF_PUBLIC 0x00000010 | |
34 | #define RT6_LOOKUP_F_SRCPREF_COA 0x00000020 | |
d5d32e4b | 35 | #define RT6_LOOKUP_F_IGNORE_LINKSTATE 0x00000040 |
77d16f45 | 36 | |
30f78d8e ED |
37 | /* We do not (yet ?) support IPv6 jumbograms (RFC 2675) |
38 | * Unlike IPv4, hdr->seg_len doesn't include the IPv6 header | |
39 | */ | |
40 | #define IP6_MAX_MTU (0xFFFF + sizeof(struct ipv6hdr)) | |
41 | ||
0c9a2ac1 YH |
42 | /* |
43 | * rt6_srcprefs2flags() and rt6_flags2srcprefs() translate | |
44 | * between IPV6_ADDR_PREFERENCES socket option values | |
45 | * IPV6_PREFER_SRC_TMP = 0x1 | |
46 | * IPV6_PREFER_SRC_PUBLIC = 0x2 | |
47 | * IPV6_PREFER_SRC_COA = 0x4 | |
48 | * and above RT6_LOOKUP_F_SRCPREF_xxx flags. | |
49 | */ | |
50 | static inline int rt6_srcprefs2flags(unsigned int srcprefs) | |
51 | { | |
52 | /* No need to bitmask because srcprefs have only 3 bits. */ | |
53 | return srcprefs << 3; | |
54 | } | |
55 | ||
56 | static inline unsigned int rt6_flags2srcprefs(int flags) | |
57 | { | |
58 | return (flags >> 3) & 7; | |
59 | } | |
1da177e4 | 60 | |
60ea37f7 WY |
61 | static inline bool rt6_need_strict(const struct in6_addr *daddr) |
62 | { | |
63 | return ipv6_addr_type(daddr) & | |
64 | (IPV6_ADDR_MULTICAST | IPV6_ADDR_LINKLOCAL | IPV6_ADDR_LOOPBACK); | |
65 | } | |
fbfe95a4 | 66 | |
5c3a0fd7 | 67 | void ip6_route_input(struct sk_buff *skb); |
d409b847 MB |
68 | struct dst_entry *ip6_route_input_lookup(struct net *net, |
69 | struct net_device *dev, | |
70 | struct flowi6 *fl6, int flags); | |
1da177e4 | 71 | |
6f21c96a PA |
72 | struct dst_entry *ip6_route_output_flags(struct net *net, const struct sock *sk, |
73 | struct flowi6 *fl6, int flags); | |
74 | ||
75 | static inline struct dst_entry *ip6_route_output(struct net *net, | |
76 | const struct sock *sk, | |
77 | struct flowi6 *fl6) | |
78 | { | |
79 | return ip6_route_output_flags(net, sk, fl6, 0); | |
80 | } | |
81 | ||
5c3a0fd7 JP |
82 | struct dst_entry *ip6_route_lookup(struct net *net, struct flowi6 *fl6, |
83 | int flags); | |
9ff74384 DA |
84 | struct rt6_info *ip6_pol_route(struct net *net, struct fib6_table *table, |
85 | int ifindex, struct flowi6 *fl6, int flags); | |
1da177e4 | 86 | |
5c3a0fd7 JP |
87 | int ip6_route_init(void); |
88 | void ip6_route_cleanup(void); | |
1da177e4 | 89 | |
5c3a0fd7 | 90 | int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg); |
1da177e4 | 91 | |
5c3a0fd7 JP |
92 | int ip6_route_add(struct fib6_config *cfg); |
93 | int ip6_ins_rt(struct rt6_info *); | |
94 | int ip6_del_rt(struct rt6_info *); | |
1da177e4 | 95 | |
a2e2ff56 DA |
96 | static inline int ip6_route_get_saddr(struct net *net, struct rt6_info *rt, |
97 | const struct in6_addr *daddr, | |
98 | unsigned int prefs, | |
99 | struct in6_addr *saddr) | |
100 | { | |
101 | struct inet6_dev *idev = | |
102 | rt ? ip6_dst_idev((struct dst_entry *)rt) : NULL; | |
103 | int err = 0; | |
104 | ||
105 | if (rt && rt->rt6i_prefsrc.plen) | |
106 | *saddr = rt->rt6i_prefsrc.addr; | |
107 | else | |
108 | err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, | |
109 | daddr, prefs, saddr); | |
110 | ||
111 | return err; | |
112 | } | |
c3968a85 | 113 | |
5c3a0fd7 JP |
114 | struct rt6_info *rt6_lookup(struct net *net, const struct in6_addr *daddr, |
115 | const struct in6_addr *saddr, int oif, int flags); | |
1da177e4 | 116 | |
5c3a0fd7 JP |
117 | struct dst_entry *icmp6_dst_alloc(struct net_device *dev, struct flowi6 *fl6); |
118 | int icmp6_dst_gc(void); | |
3b00944c | 119 | |
5c3a0fd7 | 120 | void fib6_force_start_gc(struct net *net); |
1da177e4 | 121 | |
5c3a0fd7 JP |
122 | struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev, |
123 | const struct in6_addr *addr, bool anycast); | |
1da177e4 | 124 | |
9ab179d8 DA |
125 | struct rt6_info *ip6_dst_alloc(struct net *net, struct net_device *dev, |
126 | int flags); | |
127 | ||
1da177e4 LT |
128 | /* |
129 | * support functions for ND | |
130 | * | |
131 | */ | |
5c3a0fd7 JP |
132 | struct rt6_info *rt6_get_dflt_router(const struct in6_addr *addr, |
133 | struct net_device *dev); | |
134 | struct rt6_info *rt6_add_dflt_router(const struct in6_addr *gwaddr, | |
135 | struct net_device *dev, unsigned int pref); | |
136 | ||
137 | void rt6_purge_dflt_routers(struct net *net); | |
138 | ||
139 | int rt6_route_rcv(struct net_device *dev, u8 *opt, int len, | |
140 | const struct in6_addr *gwaddr); | |
141 | ||
142 | void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu, int oif, | |
e2d118a1 | 143 | u32 mark, kuid_t uid); |
5c3a0fd7 | 144 | void ip6_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, __be32 mtu); |
e2d118a1 LC |
145 | void ip6_redirect(struct sk_buff *skb, struct net *net, int oif, u32 mark, |
146 | kuid_t uid); | |
5c3a0fd7 JP |
147 | void ip6_redirect_no_header(struct sk_buff *skb, struct net *net, int oif, |
148 | u32 mark); | |
149 | void ip6_sk_redirect(struct sk_buff *skb, struct sock *sk); | |
1da177e4 | 150 | |
1da177e4 | 151 | struct netlink_callback; |
1da177e4 | 152 | |
fd2c3ef7 | 153 | struct rt6_rtnl_dump_arg { |
1b43af54 PM |
154 | struct sk_buff *skb; |
155 | struct netlink_callback *cb; | |
191cd582 | 156 | struct net *net; |
1b43af54 PM |
157 | }; |
158 | ||
5c3a0fd7 JP |
159 | int rt6_dump_route(struct rt6_info *rt, void *p_arg); |
160 | void rt6_ifdown(struct net *net, struct net_device *dev); | |
161 | void rt6_mtu_change(struct net_device *dev, unsigned int mtu); | |
162 | void rt6_remove_prefsrc(struct inet6_ifaddr *ifp); | |
be7a010d | 163 | void rt6_clean_tohost(struct net *net, struct in6_addr *gateway); |
1da177e4 | 164 | |
1da177e4 LT |
165 | |
166 | /* | |
167 | * Store a destination cache entry in a socket | |
168 | */ | |
6bd4f355 ED |
169 | static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst, |
170 | const struct in6_addr *daddr, | |
171 | const struct in6_addr *saddr) | |
1da177e4 LT |
172 | { |
173 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1da177e4 | 174 | |
6bd4f355 | 175 | np->dst_cookie = rt6_get_cookie((struct rt6_info *)dst); |
f83ef8c0 | 176 | sk_setup_caps(sk, dst); |
1da177e4 | 177 | np->daddr_cache = daddr; |
8e1ef0a9 YH |
178 | #ifdef CONFIG_IPV6_SUBTREES |
179 | np->saddr_cache = saddr; | |
180 | #endif | |
1da177e4 LT |
181 | } |
182 | ||
a50feda5 | 183 | static inline bool ipv6_unicast_destination(const struct sk_buff *skb) |
1da177e4 | 184 | { |
adf30907 | 185 | struct rt6_info *rt = (struct rt6_info *) skb_dst(skb); |
1da177e4 LT |
186 | |
187 | return rt->rt6i_flags & RTF_LOCAL; | |
188 | } | |
189 | ||
2647a9b0 MKL |
190 | static inline bool ipv6_anycast_destination(const struct dst_entry *dst, |
191 | const struct in6_addr *daddr) | |
509aba3b | 192 | { |
2647a9b0 | 193 | struct rt6_info *rt = (struct rt6_info *)dst; |
509aba3b | 194 | |
2647a9b0 MKL |
195 | return rt->rt6i_flags & RTF_ANYCAST || |
196 | (rt->rt6i_dst.plen != 128 && | |
197 | ipv6_addr_equal(&rt->rt6i_dst.addr, daddr)); | |
509aba3b FLB |
198 | } |
199 | ||
7d8c6e39 EB |
200 | int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb, |
201 | int (*output)(struct net *, struct sock *, struct sk_buff *)); | |
ad0081e4 DS |
202 | |
203 | static inline int ip6_skb_dst_mtu(struct sk_buff *skb) | |
204 | { | |
f60e5990 | 205 | struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ? |
206 | inet6_sk(skb->sk) : NULL; | |
ad0081e4 | 207 | |
93b36cf3 | 208 | return (np && np->pmtudisc >= IPV6_PMTUDISC_PROBE) ? |
ad0081e4 DS |
209 | skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb)); |
210 | } | |
211 | ||
93b36cf3 HFS |
212 | static inline bool ip6_sk_accept_pmtu(const struct sock *sk) |
213 | { | |
0b95227a HFS |
214 | return inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_INTERFACE && |
215 | inet6_sk(sk)->pmtudisc != IPV6_PMTUDISC_OMIT; | |
216 | } | |
217 | ||
60ff7467 | 218 | static inline bool ip6_sk_ignore_df(const struct sock *sk) |
0b95227a HFS |
219 | { |
220 | return inet6_sk(sk)->pmtudisc < IPV6_PMTUDISC_DO || | |
221 | inet6_sk(sk)->pmtudisc == IPV6_PMTUDISC_OMIT; | |
93b36cf3 HFS |
222 | } |
223 | ||
2647a9b0 MKL |
224 | static inline struct in6_addr *rt6_nexthop(struct rt6_info *rt, |
225 | struct in6_addr *daddr) | |
9bb5a148 | 226 | { |
2647a9b0 MKL |
227 | if (rt->rt6i_flags & RTF_GATEWAY) |
228 | return &rt->rt6i_gateway; | |
45e4fd26 | 229 | else if (unlikely(rt->rt6i_flags & RTF_CACHE)) |
2647a9b0 MKL |
230 | return &rt->rt6i_dst.addr; |
231 | else | |
232 | return daddr; | |
9bb5a148 YH |
233 | } |
234 | ||
1da177e4 | 235 | #endif |