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_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
32#define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */
33#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1)
34#define SIOCGETRPF (SIOCPROTOPRIVATE+2)
35
36#define MAXVIFS 32
37typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */
38typedef unsigned short vifi_t;
39#define ALL_VIFS ((vifi_t)(-1))
40
41/*
42 * Same idea as select
43 */
44
45#define VIFM_SET(n,m) ((m)|=(1<<(n)))
46#define VIFM_CLR(n,m) ((m)&=~(1<<(n)))
47#define VIFM_ISSET(n,m) ((m)&(1<<(n)))
48#define VIFM_CLRALL(m) ((m)=0)
49#define VIFM_COPY(mfrom,mto) ((mto)=(mfrom))
50#define VIFM_SAME(m1,m2) ((m1)==(m2))
51
52/*
53 * Passed by mrouted for an MRT_ADD_VIF - again we use the
54 * mrouted 3.6 structures for compatibility
55 */
56
57struct vifctl {
58 vifi_t vifc_vifi; /* Index of VIF */
59 unsigned char vifc_flags; /* VIFF_ flags */
60 unsigned char vifc_threshold; /* ttl limit */
61 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */
62 struct in_addr vifc_lcl_addr; /* Our address */
63 struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */
64};
65
66#define VIFF_TUNNEL 0x1 /* IPIP tunnel */
67#define VIFF_SRCRT 0x2 /* NI */
68#define VIFF_REGISTER 0x4 /* register vif */
69
70/*
71 * Cache manipulation structures for mrouted and PIMd
72 */
73
74struct mfcctl
75{
76 struct in_addr mfcc_origin; /* Origin of mcast */
77 struct in_addr mfcc_mcastgrp; /* Group in question */
78 vifi_t mfcc_parent; /* Where it arrived */
79 unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */
80 unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */
81 unsigned int mfcc_byte_cnt;
82 unsigned int mfcc_wrong_if;
83 int mfcc_expire;
84};
85
86/*
87 * Group count retrieval for mrouted
88 */
89
90struct sioc_sg_req
91{
92 struct in_addr src;
93 struct in_addr 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_vif_req
104{
105 vifi_t vifi; /* 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 * This is the format the mroute daemon expects to see IGMP control
114 * data. Magically happens to be like an IP packet as per the original
115 */
116
117struct igmpmsg
118{
119 __u32 unused1,unused2;
120 unsigned char im_msgtype; /* What is this */
121 unsigned char im_mbz; /* Must be zero */
122 unsigned char im_vif; /* Interface (this ought to be a vifi_t!) */
123 unsigned char unused3;
124 struct in_addr im_src,im_dst;
125};
126
127/*
128 * That's all usermode folks
129 */
130
131#ifdef __KERNEL__
132#include <linux/pim.h>
133#include <net/sock.h>
134
135#ifdef CONFIG_IP_MROUTE
136static inline int ip_mroute_opt(int opt)
137{
138 return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10);
139}
140#else
141static inline int ip_mroute_opt(int opt)
142{
143 return 0;
144}
145#endif
146
147#ifdef CONFIG_IP_MROUTE
148extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
149extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
150extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
151extern int ip_mr_init(void);
152#else
153static inline
154int ip_mroute_setsockopt(struct sock *sock,
155 int optname, char __user *optval, int optlen)
156{
157 return -ENOPROTOOPT;
158}
159
160static inline
161int ip_mroute_getsockopt(struct sock *sock,
162 int optname, char __user *optval, int __user *optlen)
163{
164 return -ENOPROTOOPT;
165}
166
167static inline
168int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
169{
170 return -ENOIOCTLCMD;
171}
172
173static inline int ip_mr_init(void)
174{
175 return 0;
176}
177#endif
178
179struct vif_device
180{
181 struct net_device *dev; /* Device we are using */
182 unsigned long bytes_in,bytes_out;
183 unsigned long pkt_in,pkt_out; /* Statistics */
184 unsigned long rate_limit; /* Traffic shaping (NI) */
185 unsigned char threshold; /* TTL threshold */
186 unsigned short flags; /* Control flags */
187 __be32 local,remote; /* Addresses(remote for tunnels)*/
188 int link; /* Physical interface index */
189};
190
191#define VIFF_STATIC 0x8000
192
193struct mfc_cache
194{
195 struct mfc_cache *next; /* Next entry on cache line */
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};
217
218#define MFC_STATIC 1
219#define MFC_NOTIFY 2
220
221#define MFC_LINES 64
222
223#ifdef __BIG_ENDIAN
224#define MFC_HASH(a,b) (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
225#else
226#define MFC_HASH(a,b) ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
227#endif
228
229#endif
230
231
232#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
233
234/*
235 * Pseudo messages used by mrouted
236 */
237
238#define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
239#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
240#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
241
242#ifdef __KERNEL__
243struct rtmsg;
244extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
245#endif
246
247#endif