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authorYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2008-04-02 20:22:53 -0400
committerYOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>2008-04-05 09:33:38 -0400
commit7bc570c8b4f75ddb3fd5dbeb38127cdc4acbcc9c (patch)
treeb688b728c3ea08479f75986d1e9f590fca1f8715 /include
parent80a9492a33dd7d852465625022d56ff76d62174d (diff)
[IPV6] MROUTE: Support multicast forwarding.
Based on ancient patch by Mickael Hoerdt <hoerdt@clarinet.u-strasbg.fr>, which is available at <http://www-r2.u-strasbg.fr/~hoerdt/dev/linux_ipv6_mforwarding/patch-linux-ipv6-mforwarding-0.1a>. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/ipv6.h5
-rw-r--r--include/linux/mroute6.h227
3 files changed, 233 insertions, 0 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index 84736acb4b99..29ab9b95d376 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -261,6 +261,7 @@ unifdef-y += mempolicy.h
261unifdef-y += mii.h 261unifdef-y += mii.h
262unifdef-y += mman.h 262unifdef-y += mman.h
263unifdef-y += mroute.h 263unifdef-y += mroute.h
264unifdef-y += mroute6.h
264unifdef-y += msdos_fs.h 265unifdef-y += msdos_fs.h
265unifdef-y += msg.h 266unifdef-y += msg.h
266unifdef-y += nbd.h 267unifdef-y += nbd.h
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
index b90d3d461d4e..f53e4764fc05 100644
--- a/include/linux/ipv6.h
+++ b/include/linux/ipv6.h
@@ -160,6 +160,9 @@ struct ipv6_devconf {
160#ifdef CONFIG_IPV6_OPTIMISTIC_DAD 160#ifdef CONFIG_IPV6_OPTIMISTIC_DAD
161 __s32 optimistic_dad; 161 __s32 optimistic_dad;
162#endif 162#endif
163#ifdef CONFIG_IPV6_MROUTE
164 __s32 mc_forwarding;
165#endif
163 void *sysctl; 166 void *sysctl;
164}; 167};
165 168
@@ -190,6 +193,7 @@ enum {
190 DEVCONF_PROXY_NDP, 193 DEVCONF_PROXY_NDP,
191 DEVCONF_OPTIMISTIC_DAD, 194 DEVCONF_OPTIMISTIC_DAD,
192 DEVCONF_ACCEPT_SOURCE_ROUTE, 195 DEVCONF_ACCEPT_SOURCE_ROUTE,
196 DEVCONF_MC_FORWARDING,
193 DEVCONF_MAX 197 DEVCONF_MAX
194}; 198};
195 199
@@ -230,6 +234,7 @@ struct inet6_skb_parm {
230#endif 234#endif
231 235
232#define IP6SKB_XFRM_TRANSFORMED 1 236#define IP6SKB_XFRM_TRANSFORMED 1
237#define IP6SKB_FORWARDED 2
233}; 238};
234 239
235#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb)) 240#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
diff --git a/include/linux/mroute6.h b/include/linux/mroute6.h
new file mode 100644
index 000000000000..b92190304e0b
--- /dev/null
+++ b/include/linux/mroute6.h
@@ -0,0 +1,227 @@
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
27#define SIOCGETMIFCNT_IN6 SIOCPROTOPRIVATE /* IP protocol privates */
28#define SIOCGETSGCNT_IN6 (SIOCPROTOPRIVATE+1)
29#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
30
31#define MAXMIFS 32
32typedef unsigned long mifbitmap_t; /* User mode code depends on this lot */
33typedef unsigned short mifi_t;
34#define ALL_MIFS ((mifi_t)(-1))
35
36#ifndef IF_SETSIZE
37#define IF_SETSIZE 256
38#endif
39
40typedef __u32 if_mask;
41#define NIFBITS (sizeof(if_mask) * 8) /* bits per mask */
42
43#if !defined(__KERNEL__) && !defined(DIV_ROUND_UP)
44#define DIV_ROUND_UP(x,y) (((x) + ((y) - 1)) / (y))
45#endif
46
47typedef struct if_set {
48 if_mask ifs_bits[DIV_ROUND_UP(IF_SETSIZE, NIFBITS)];
49} if_set;
50
51#define IF_SET(n, p) ((p)->ifs_bits[(n)/NIFBITS] |= (1 << ((n) % NIFBITS)))
52#define IF_CLR(n, p) ((p)->ifs_bits[(n)/NIFBITS] &= ~(1 << ((n) % NIFBITS)))
53#define IF_ISSET(n, p) ((p)->ifs_bits[(n)/NIFBITS] & (1 << ((n) % NIFBITS)))
54#define IF_COPY(f, t) bcopy(f, t, sizeof(*(f)))
55#define IF_ZERO(p) bzero(p, sizeof(*(p)))
56
57/*
58 * Passed by mrouted for an MRT_ADD_MIF - again we use the
59 * mrouted 3.6 structures for compatibility
60 */
61
62struct mif6ctl {
63 mifi_t mif6c_mifi; /* Index of MIF */
64 unsigned char mif6c_flags; /* MIFF_ flags */
65 unsigned char vifc_threshold; /* ttl limit */
66 u_short mif6c_pifi; /* the index of the physical IF */
67 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
68};
69
70#define MIFF_REGISTER 0x1 /* register vif */
71
72/*
73 * Cache manipulation structures for mrouted and PIMd
74 */
75
76struct mf6cctl
77{
78 struct sockaddr_in6 mf6cc_origin; /* Origin of mcast */
79 struct sockaddr_in6 mf6cc_mcastgrp; /* Group in question */
80 mifi_t mf6cc_parent; /* Where it arrived */
81 struct if_set mf6cc_ifset; /* Where it is going */
82};
83
84/*
85 * Group count retrieval for pim6sd
86 */
87
88struct sioc_sg_req6
89{
90 struct sockaddr_in6 src;
91 struct sockaddr_in6 grp;
92 unsigned long pktcnt;
93 unsigned long bytecnt;
94 unsigned long wrong_if;
95};
96
97/*
98 * To get vif packet counts
99 */
100
101struct sioc_mif_req6
102{
103 mifi_t mifi; /* Which iface */
104 unsigned long icount; /* In packets */
105 unsigned long ocount; /* Out packets */
106 unsigned long ibytes; /* In bytes */
107 unsigned long obytes; /* Out bytes */
108};
109
110/*
111 * That's all usermode folks
112 */
113
114#ifdef __KERNEL__
115
116#include <linux/skbuff.h> /* for struct sk_buff_head */
117
118struct net_device;
119struct inet6_dev *ipv6_find_idev(struct net_device *dev);
120
121#ifdef CONFIG_IPV6_MROUTE
122static inline int ip6_mroute_opt(int opt)
123{
124 return (opt >= MRT6_BASE) && (opt <= MRT6_BASE + 10);
125}
126#else
127static inline int ip6_mroute_opt(int opt)
128{
129 return 0;
130}
131#endif
132
133struct sock;
134
135extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, int);
136extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
137extern int ip6_mr_input(struct sk_buff *skb);
138extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
139extern void ip6_mr_init(void);
140
141struct mif_device
142{
143 struct net_device *dev; /* Device we are using */
144 unsigned long bytes_in,bytes_out;
145 unsigned long pkt_in,pkt_out; /* Statistics */
146 unsigned long rate_limit; /* Traffic shaping (NI) */
147 unsigned char threshold; /* TTL threshold */
148 unsigned short flags; /* Control flags */
149 int link; /* Physical interface index */
150};
151
152#define VIFF_STATIC 0x8000
153
154struct mfc6_cache
155{
156 struct mfc6_cache *next; /* Next entry on cache line */
157 struct in6_addr mf6c_mcastgrp; /* Group the entry belongs to */
158 struct in6_addr mf6c_origin; /* Source of packet */
159 mifi_t mf6c_parent; /* Source interface */
160 int mfc_flags; /* Flags on line */
161
162 union {
163 struct {
164 unsigned long expires;
165 struct sk_buff_head unresolved; /* Unresolved buffers */
166 } unres;
167 struct {
168 unsigned long last_assert;
169 int minvif;
170 int maxvif;
171 unsigned long bytes;
172 unsigned long pkt;
173 unsigned long wrong_if;
174 unsigned char ttls[MAXMIFS]; /* TTL thresholds */
175 } res;
176 } mfc_un;
177};
178
179#define MFC_STATIC 1
180#define MFC_NOTIFY 2
181
182#define MFC6_LINES 64
183
184#define MFC6_HASH(a, g) (((__force u32)(a)->s6_addr32[0] ^ \
185 (__force u32)(a)->s6_addr32[1] ^ \
186 (__force u32)(a)->s6_addr32[2] ^ \
187 (__force u32)(a)->s6_addr32[3] ^ \
188 (__force u32)(g)->s6_addr32[0] ^ \
189 (__force u32)(g)->s6_addr32[1] ^ \
190 (__force u32)(g)->s6_addr32[2] ^ \
191 (__force u32)(g)->s6_addr32[3]) % MFC6_LINES)
192
193#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
194
195#endif
196
197#ifdef __KERNEL__
198struct rtmsg;
199extern int ip6mr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
200
201#ifdef CONFIG_IPV6_MROUTE
202extern struct sock *mroute6_socket;
203extern int ip6mr_sk_done(struct sock *sk);
204#else
205#define mroute6_socket NULL
206static inline int ip6mr_sk_done(struct sock *sk) { return 0; }
207#endif
208#endif
209
210/*
211 * Structure used to communicate from kernel to multicast router.
212 * We'll overlay the structure onto an MLD header (not an IPv6 heder like igmpmsg{}
213 * used for IPv4 implementation). This is because this structure will be passed via an
214 * IPv6 raw socket, on wich an application will only receiver the payload i.e the data after
215 * the IPv6 header and all the extension headers. (See section 3 of RFC 3542)
216 */
217
218struct mrt6msg {
219#define MRT6MSG_NOCACHE 1
220 __u8 im6_mbz; /* must be zero */
221 __u8 im6_msgtype; /* what type of message */
222 __u16 im6_mif; /* mif rec'd on */
223 __u32 im6_pad; /* padding for 64 bit arch */
224 struct in6_addr im6_src, im6_dst;
225};
226
227#endif