Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#ifndef __LINUX_MROUTE6_H
2#define __LINUX_MROUTE6_H
3
4#include <linux/types.h>
5#include <linux/sockios.h>
6
7/*
8 * Based on the MROUTING 3.5 defines primarily to keep
9 * source compatibility with BSD.
10 *
11 * See the pim6sd code for the original history.
12 *
13 * Protocol Independent Multicast (PIM) data structures included
14 * Carlos Picoto (cap@di.fc.ul.pt)
15 *
16 */
17
18#define MRT6_BASE 200
19#define MRT6_INIT (MRT6_BASE) /* Activate the kernel mroute code */
20#define MRT6_DONE (MRT6_BASE+1) /* Shutdown the kernel mroute */
21#define MRT6_ADD_MIF (MRT6_BASE+2) /* Add a virtual interface */
22#define MRT6_DEL_MIF (MRT6_BASE+3) /* Delete a virtual interface */
23#define MRT6_ADD_MFC (MRT6_BASE+4) /* Add a multicast forwarding entry */
24#define MRT6_DEL_MFC (MRT6_BASE+5) /* Delete a multicast forwarding entry */
25#define MRT6_VERSION (MRT6_BASE+6) /* Get the kernel multicast version */
26#define MRT6_ASSERT (MRT6_BASE+7) /* Activate PIM assert mode */
27#define MRT6_PIM (MRT6_BASE+8) /* enable PIM code */
28
29#define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
30#define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
31#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
32
33#define MAXMIFS 32
34typedef unsigned long mifbitmap_t; /* User mode code depends on this lot */
35typedef unsigned short mifi_t;
36#define ALL_MIFS ((mifi_t)(-1))
37
38#ifndef IF_SETSIZE
39#define IF_SETSIZE 256
40#endif
41
42typedef __u32 if_mask;
43#define NIFBITS (sizeof(if_mask) * 8) /* bits per mask */
44
45#if !defined(__KERNEL__) && !defined(DIV_ROUND_UP)
46#define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
47#endif
48
49typedef struct if_set {
50 if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
51} if_set;
52
53#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
54#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
55#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
56#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
57#define IF_ZERO(p) bzero(p, sizeof(*(p)))
58
59/*
60 * Passed by mrouted for an MRT_ADD_MIF - again we use the
61 * mrouted 3.6 structures for compatibility
62 */
63
64struct mif6ctl {
65 mifi_t mif6c_mifi; /* Index of MIF */
66 unsigned char mif6c_flags; /* MIFF_ flags */
67 unsigned char vifc_threshold; /* ttl limit */
68 u_short mif6c_pifi; /* the index of the physical IF */
69 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
70};
71
72#define MIFF_REGISTER 0x1 /* register vif */
73
74/*
75 * Cache manipulation structures for mrouted and PIMd
76 */
77
78struct mf6cctl
79{
80 struct sockaddr_in6 mf6cc_origin; /* Origin of mcast */
81 struct sockaddr_in6 mf6cc_mcastgrp; /* Group in question */
82 mifi_t mf6cc_parent; /* Where it arrived */
83 struct if_set mf6cc_ifset; /* Where it is going */
84};
85
86/*
87 * Group count retrieval for pim6sd
88 */
89
90struct sioc_sg_req6
91{
92 struct sockaddr_in6 src;
93 struct sockaddr_in6 grp;
94 unsigned long pktcnt;
95 unsigned long bytecnt;
96 unsigned long wrong_if;
97};
98
99/*
100 * To get vif packet counts
101 */
102
103struct sioc_mif_req6
104{
105 mifi_t mifi; /* Which iface */
106 unsigned long icount; /* In packets */
107 unsigned long ocount; /* Out packets */
108 unsigned long ibytes; /* In bytes */
109 unsigned long obytes; /* Out bytes */
110};
111
112/*
113 * That's all usermode folks
114 */
115
116#ifdef __KERNEL__
117
118#include <linux/skbuff.h> /* for struct sk_buff_head */
119
120#ifdef CONFIG_IPV6_MROUTE
121static inline int ip6_mroute_opt(int opt)
122{
123 return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
124}
125#else
126static inline int ip6_mroute_opt(int opt)
127{
128 return 0;
129}
130#endif
131
132struct sock;
133
134extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, int);
135extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
136extern int ip6_mr_input(struct sk_buff *skb);
137extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
138extern void ip6_mr_init(void);
139
140struct mif_device
141{
142 struct net_device *dev; /* Device we are using */
143 unsigned long bytes_in,bytes_out;
144 unsigned long pkt_in,pkt_out; /* Statistics */
145 unsigned long rate_limit; /* Traffic shaping (NI) */
146 unsigned char threshold; /* TTL threshold */
147 unsigned short flags; /* Control flags */
148 int link; /* Physical interface index */
149};
150
151#define VIFF_STATIC 0x8000
152
153struct mfc6_cache
154{
155 struct mfc6_cache *next; /* Next entry on cache line */
156 struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
157 struct in6_addr mf6c_origin; /* Source of packet */
158 mifi_t mf6c_parent; /* Source interface */
159 int mfc_flags; /* Flags on line */
160
161 union {
162 struct {
163 unsigned long expires;
164 struct sk_buff_head unresolved; /* Unresolved buffers */
165 } unres;
166 struct {
167 unsigned long last_assert;
168 int minvif;
169 int maxvif;
170 unsigned long bytes;
171 unsigned long pkt;
172 unsigned long wrong_if;
173 unsigned char ttls[MAXMIFS]; /* TTL thresholds */
174 } res;
175 } mfc_un;
176};
177
178#define MFC_STATIC 1
179#define MFC_NOTIFY 2
180
181#define MFC6_LINES 64
182
183#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
184 (__force u32)(a)->s6_addr32[1] ^ \
185 (__force u32)(a)->s6_addr32[2] ^ \
186 (__force u32)(a)->s6_addr32[3] ^ \
187 (__force u32)(g)->s6_addr32[0] ^ \
188 (__force u32)(g)->s6_addr32[1] ^ \
189 (__force u32)(g)->s6_addr32[2] ^ \
190 (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
191
192#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
193
194#endif
195
196#ifdef __KERNEL__
197struct rtmsg;
198extern int ip6mr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
199
200#ifdef CONFIG_IPV6_MROUTE
201extern struct sock *mroute6_socket;
202extern int ip6mr_sk_done(struct sock *sk);
203#else
204#define mroute6_socket NULL
205static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
206#endif
207#endif
208
209/*
210 * Structure used to communicate from kernel to multicast router.
211 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
212 * used for IPv4 implementation). This is because this structure will be passed via an
213 * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
214 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
215 */
216
217struct mrt6msg {
218#define MRT6MSG_NOCACHE 1
219#define MRT6MSG_WRONGMIF 2
220#define MRT6MSG_WHOLEPKT 3 /* used for use level encap */
221 __u8 im6_mbz; /* must be zero */
222 __u8 im6_msgtype; /* what type of message */
223 __u16 im6_mif; /* mif rec'd on */
224 __u32 im6_pad; /* padding for 64 bit arch */
225 struct in6_addr im6_src, im6_dst;
226};
227
228#endif