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#include <linux/pim.h>
10
11/*
12 * Based on the MROUTING 3.5 defines primarily to keep
13 * source compatibility with BSD.
14 *
15 * See the mrouted code for the original history.
16 *
17 * Protocol Independent Multicast (PIM) data structures included
18 * Carlos Picoto (cap@di.fc.ul.pt)
19 *
20 */
21
22#define MRT_BASE 200
23#define MRT_INIT (MRT_BASE) /* Activate the kernel mroute code */
24#define MRT_DONE (MRT_BASE+1) /* Shutdown the kernel mroute */
25#define MRT_ADD_VIF (MRT_BASE+2) /* Add a virtual interface */
26#define MRT_DEL_VIF (MRT_BASE+3) /* Delete a virtual interface */
27#define MRT_ADD_MFC (MRT_BASE+4) /* Add a multicast forwarding entry */
28#define MRT_DEL_MFC (MRT_BASE+5) /* Delete a multicast forwarding entry */
29#define MRT_VERSION (MRT_BASE+6) /* Get the kernel multicast version */
30#define MRT_ASSERT (MRT_BASE+7) /* Activate PIM assert mode */
31#define MRT_PIM (MRT_BASE+8) /* enable PIM code */
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 struct in_addr vifc_lcl_addr; /* Our address */
64 struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */
65};
66
67#define VIFF_TUNNEL 0x1 /* IPIP tunnel */
68#define VIFF_SRCRT 0x2 /* NI */
69#define VIFF_REGISTER 0x4 /* register vif */
70
71/*
72 * Cache manipulation structures for mrouted and PIMd
73 */
74
75struct mfcctl
76{
77 struct in_addr mfcc_origin; /* Origin of mcast */
78 struct in_addr mfcc_mcastgrp; /* Group in question */
79 vifi_t mfcc_parent; /* Where it arrived */
80 unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */
81 unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */
82 unsigned int mfcc_byte_cnt;
83 unsigned int mfcc_wrong_if;
84 int mfcc_expire;
85};
86
87/*
88 * Group count retrieval for mrouted
89 */
90
91struct sioc_sg_req
92{
93 struct in_addr src;
94 struct in_addr grp;
95 unsigned long pktcnt;
96 unsigned long bytecnt;
97 unsigned long wrong_if;
98};
99
100/*
101 * To get vif packet counts
102 */
103
104struct sioc_vif_req
105{
106 vifi_t vifi; /* Which iface */
107 unsigned long icount; /* In packets */
108 unsigned long ocount; /* Out packets */
109 unsigned long ibytes; /* In bytes */
110 unsigned long obytes; /* Out bytes */
111};
112
113/*
114 * This is the format the mroute daemon expects to see IGMP control
115 * data. Magically happens to be like an IP packet as per the original
116 */
117
118struct igmpmsg
119{
120 __u32 unused1,unused2;
121 unsigned char im_msgtype; /* What is this */
122 unsigned char im_mbz; /* Must be zero */
123 unsigned char im_vif; /* Interface (this ought to be a vifi_t!) */
124 unsigned char unused3;
125 struct in_addr im_src,im_dst;
126};
127
128/*
129 * That's all usermode folks
130 */
131
132#ifdef __KERNEL__
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
147extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
148extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
149extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
150extern void ip_mr_init(void);
151
152
153struct vif_device
154{
155 struct net_device *dev; /* Device we are using */
156 unsigned long bytes_in,bytes_out;
157 unsigned long pkt_in,pkt_out; /* Statistics */
158 unsigned long rate_limit; /* Traffic shaping (NI) */
159 unsigned char threshold; /* TTL threshold */
160 unsigned short flags; /* Control flags */
161 __be32 local,remote; /* Addresses(remote for tunnels)*/
162 int link; /* Physical interface index */
163};
164
165#define VIFF_STATIC 0x8000
166
167struct mfc_cache
168{
169 struct mfc_cache *next; /* Next entry on cache line */
170 __be32 mfc_mcastgrp; /* Group the entry belongs to */
171 __be32 mfc_origin; /* Source of packet */
172 vifi_t mfc_parent; /* Source interface */
173 int mfc_flags; /* Flags on line */
174
175 union {
176 struct {
177 unsigned long expires;
178 struct sk_buff_head unresolved; /* Unresolved buffers */
179 } unres;
180 struct {
181 unsigned long last_assert;
182 int minvif;
183 int maxvif;
184 unsigned long bytes;
185 unsigned long pkt;
186 unsigned long wrong_if;
187 unsigned char ttls[MAXVIFS]; /* TTL thresholds */
188 } res;
189 } mfc_un;
190};
191
192#define MFC_STATIC 1
193#define MFC_NOTIFY 2
194
195#define MFC_LINES 64
196
197#ifdef __BIG_ENDIAN
198#define MFC_HASH(a,b) (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1))
199#else
200#define MFC_HASH(a,b) ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1))
201#endif
202
203#endif
204
205
206#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */
207
208/*
209 * Pseudo messages used by mrouted
210 */
211
212#define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */
213#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */
214#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */
215
216#ifdef __KERNEL__
217struct rtmsg;
218extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait);
219#endif
220
221#endif