Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef __LINUX_MROUTE_H
2#define __LINUX_MROUTE_H
3
4#include <linux/sockios.h>
5#include <linux/types.h>
6#ifdef __KERNEL__
7#include <linux/in.h>
8#endif
9
10/*
11 * Based on the MROUTING 3.5 defines primarily to keep
12 * source compatibility with BSD.
13 *
14 * See the mrouted code for the original history.
15 *
16 * Protocol Independent Multicast (PIM) data structures included
17 * Carlos Picoto (cap@di.fc.ul.pt)
18 *
19 */
20
21#define MRT_BASE 200
22#define MRT_INIT (MRT_BASE) /* Activate the kernel mroute code */
23#define MRT_DONE (MRT_BASE+1) /* Shutdown the kernel mroute */
24#define MRT_ADD_VIF (MRT_BASE+2) /* Add a virtual interface */
25#define MRT_DEL_VIF (MRT_BASE+3) /* Delete a virtual interface */
26#define MRT_ADD_MFC (MRT_BASE+4) /* Add a multicast forwarding entry */
27#define MRT_DEL_MFC (MRT_BASE+5) /* Delete a multicast forwarding entry */
28#define MRT_VERSION (MRT_BASE+6) /* Get the kernel multicast version */
29#define MRT_ASSERT (MRT_BASE+7) /* Activate PIM assert mode */
30#define MRT_PIM (MRT_BASE+8) /* enable PIM code */
31#define MRT_TABLE (MRT_BASE+9) /* Specify mroute table ID */
32
33#define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */
34#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
35#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
36
37#define MAXVIFS 32
38typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
39typedef unsigned short vifi_t;
40#define ALL_VIFS ((vifi_t)(-1))
41
42/*
43 * Same idea as select
44 */
45
46#define VIFM_SET(n,m) ((m)|=(1<<(n)))
47#define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
48#define VIFM_ISSET(n,m) ((m)&(1<<(n)))
49#define VIFM_CLRALL(m) ((m)=0)
50#define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
51#define VIFM_SAME(m1,m2) ((m1)==(m2))
52
53/*
54 * Passed by mrouted for an MRT_ADD_VIF - again we use the
55 * mrouted 3.6 structures for compatibility
56 */
57
58struct vifctl {
59 vifi_t vifc_vifi; /* Index of VIF */
60 unsigned char vifc_flags; /* VIFF_ flags */
61 unsigned char vifc_threshold; /* ttl limit */
62 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
63 union {
64 struct in_addr vifc_lcl_addr; /* Local interface address */
65 int vifc_lcl_ifindex; /* Local interface index */
66 };
67 struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */
68};
69
70#define VIFF_TUNNEL 0x1 /* IPIP tunnel */
71#define VIFF_SRCRT 0x2 /* NI */
72#define VIFF_REGISTER 0x4 /* register vif */
73#define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of
74 vifc_lcl_addr to find an interface */
75
76/*
77 * Cache manipulation structures for mrouted and PIMd
78 */
79
80struct mfcctl {
81 struct in_addr mfcc_origin; /* Origin of mcast */
82 struct in_addr mfcc_mcastgrp; /* Group in question */
83 vifi_t mfcc_parent; /* Where it arrived */
84 unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */
85 unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */
86 unsigned int mfcc_byte_cnt;
87 unsigned int mfcc_wrong_if;
88 int mfcc_expire;
89};
90
91/*
92 * Group count retrieval for mrouted
93 */
94
95struct sioc_sg_req {
96 struct in_addr src;
97 struct in_addr grp;
98 unsigned long pktcnt;
99 unsigned long bytecnt;
100 unsigned long wrong_if;
101};
102
103/*
104 * To get vif packet counts
105 */
106
107struct sioc_vif_req {
108 vifi_t vifi; /* Which iface */
109 unsigned long icount; /* In packets */
110 unsigned long ocount; /* Out packets */
111 unsigned long ibytes; /* In bytes */
112 unsigned long obytes; /* Out bytes */
113};
114
115/*
116 * This is the format the mroute daemon expects to see IGMP control
117 * data. Magically happens to be like an IP packet as per the original
118 */
119
120struct igmpmsg {
121 __u32 unused1,unused2;
122 unsigned char im_msgtype; /* What is this */
123 unsigned char im_mbz; /* Must be zero */
124 unsigned char im_vif; /* Interface (this ought to be a vifi_t!) */
125 unsigned char unused3;
126 struct in_addr im_src,im_dst;
127};
128
129/*
130 * That's all usermode folks
131 */
132
133#ifdef __KERNEL__
134#include <linux/pim.h>
135#include <net/sock.h>
136
137#ifdef CONFIG_IP_MROUTE
138static inline int ip_mroute_opt(int opt)
139{
140 return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
141}
142#else
143static inline int ip_mroute_opt(int opt)
144{
145 return 0;
146}
147#endif
148
149#ifdef CONFIG_IP_MROUTE
150extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
151extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
152extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
153extern int ip_mr_init(void);
154#else
155static inline
156int ip_mroute_setsockopt(struct sock *sock,
157 int optname, char __user *optval, unsigned int optlen)
158{
159 return -ENOPROTOOPT;
160}
161
162static inline
163int ip_mroute_getsockopt(struct sock *sock,
164 int optname, char __user *optval, int __user *optlen)
165{
166 return -ENOPROTOOPT;
167}
168
169static inline
170int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
171{
172 return -ENOIOCTLCMD;
173}
174
175static inline int ip_mr_init(void)
176{
177 return 0;
178}
179#endif
180
181struct vif_device {
182 struct net_device *dev; /* Device we are using */
183 unsigned long bytes_in,bytes_out;
184 unsigned long pkt_in,pkt_out; /* Statistics */
185 unsigned long rate_limit; /* Traffic shaping (NI) */
186 unsigned char threshold; /* TTL threshold */
187 unsigned short flags; /* Control flags */
188 __be32 local,remote; /* Addresses(remote for tunnels)*/
189 int link; /* Physical interface index */
190};
191
192#define VIFF_STATIC 0x8000
193
194struct mfc_cache {
195 struct list_head list;
196 __be32 mfc_mcastgrp; /* Group the entry belongs to */
197 __be32 mfc_origin; /* Source of packet */
198 vifi_t mfc_parent; /* Source interface */
199 int mfc_flags; /* Flags on line */
200
201 union {
202 struct {
203 unsigned long expires;
204 struct sk_buff_head unresolved; /* Unresolved buffers */
205 } unres;
206 struct {
207 unsigned long last_assert;
208 int minvif;
209 int maxvif;
210 unsigned long bytes;
211 unsigned long pkt;
212 unsigned long wrong_if;
213 unsigned char ttls[MAXVIFS]; /* TTL thresholds */
214 } res;
215 } mfc_un;
216 struct rcu_head rcu;
217};
218
219#define MFC_STATIC 1
220#define MFC_NOTIFY 2
221
222#define MFC_LINES 64
223
224#ifdef __BIG_ENDIAN
225#define MFC_HASH(a,b) (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
226#else
227#define MFC_HASH(a,b) ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
228#endif
229
230#endif
231
232
233#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
234
235/*
236 * Pseudo messages used by mrouted
237 */
238
239#define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
240#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
241#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
242
243#ifdef __KERNEL__
244struct rtmsg;
245extern int ipmr_get_route(struct net *net, struct sk_buff *skb,
246 struct rtmsg *rtm, int nowait);
247#endif
248
249#endif