1#ifndef __LINUX_MROUTE_H 2#define __LINUX_MROUTE_H 3 4#include <linux/sockios.h> 5#include <linux/in.h> 6 7/* 8 * Based on the MROUTING 3.5 defines primarily to keep 9 * source compatibility with BSD. 10 * 11 * See the mrouted 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 MRT_BASE 200 19#define MRT_INIT (MRT_BASE) /* Activate the kernel mroute code */ 20#define MRT_DONE (MRT_BASE+1) /* Shutdown the kernel mroute */ 21#define MRT_ADD_VIF (MRT_BASE+2) /* Add a virtual interface */ 22#define MRT_DEL_VIF (MRT_BASE+3) /* Delete a virtual interface */ 23#define MRT_ADD_MFC (MRT_BASE+4) /* Add a multicast forwarding entry */ 24#define MRT_DEL_MFC (MRT_BASE+5) /* Delete a multicast forwarding entry */ 25#define MRT_VERSION (MRT_BASE+6) /* Get the kernel multicast version */ 26#define MRT_ASSERT (MRT_BASE+7) /* Activate PIM assert mode */ 27#define MRT_PIM (MRT_BASE+8) /* enable PIM code */ 28 29#define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */ 30#define SIOCGETSGCNT (SIOCPROTOPRIVATE+1) 31#define SIOCGETRPF (SIOCPROTOPRIVATE+2) 32 33#define MAXVIFS 32 34typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */ 35typedef unsigned short vifi_t; 36#define ALL_VIFS ((vifi_t)(-1)) 37 38/* 39 * Same idea as select 40 */ 41 42#define VIFM_SET(n,m) ((m)|=(1<<(n))) 43#define VIFM_CLR(n,m) ((m)&=~(1<<(n))) 44#define VIFM_ISSET(n,m) ((m)&(1<<(n))) 45#define VIFM_CLRALL(m) ((m)=0) 46#define VIFM_COPY(mfrom,mto) ((mto)=(mfrom)) 47#define VIFM_SAME(m1,m2) ((m1)==(m2)) 48 49/* 50 * Passed by mrouted for an MRT_ADD_VIF - again we use the 51 * mrouted 3.6 structures for compatibility 52 */ 53 54struct vifctl { 55 vifi_t vifc_vifi; /* Index of VIF */ 56 unsigned char vifc_flags; /* VIFF_ flags */ 57 unsigned char vifc_threshold; /* ttl limit */ 58 unsigned int vifc_rate_limit; /* Rate limiter values (NI) */ 59 struct in_addr vifc_lcl_addr; /* Our address */ 60 struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */ 61}; 62 63#define VIFF_TUNNEL 0x1 /* IPIP tunnel */ 64#define VIFF_SRCRT 0x2 /* NI */ 65#define VIFF_REGISTER 0x4 /* register vif */ 66 67/* 68 * Cache manipulation structures for mrouted and PIMd 69 */ 70 71struct mfcctl 72{ 73 struct in_addr mfcc_origin; /* Origin of mcast */ 74 struct in_addr mfcc_mcastgrp; /* Group in question */ 75 vifi_t mfcc_parent; /* Where it arrived */ 76 unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */ 77 unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */ 78 unsigned int mfcc_byte_cnt; 79 unsigned int mfcc_wrong_if; 80 int mfcc_expire; 81}; 82 83/* 84 * Group count retrieval for mrouted 85 */ 86 87struct sioc_sg_req 88{ 89 struct in_addr src; 90 struct in_addr grp; 91 unsigned long pktcnt; 92 unsigned long bytecnt; 93 unsigned long wrong_if; 94}; 95 96/* 97 * To get vif packet counts 98 */ 99 100struct sioc_vif_req 101{ 102 vifi_t vifi; /* Which iface */ 103 unsigned long icount; /* In packets */ 104 unsigned long ocount; /* Out packets */ 105 unsigned long ibytes; /* In bytes */ 106 unsigned long obytes; /* Out bytes */ 107}; 108 109/* 110 * This is the format the mroute daemon expects to see IGMP control 111 * data. Magically happens to be like an IP packet as per the original 112 */ 113 114struct igmpmsg 115{ 116 __u32 unused1,unused2; 117 unsigned char im_msgtype; /* What is this */ 118 unsigned char im_mbz; /* Must be zero */ 119 unsigned char im_vif; /* Interface (this ought to be a vifi_t!) */ 120 unsigned char unused3; 121 struct in_addr im_src,im_dst; 122}; 123 124/* 125 * That's all usermode folks 126 */ 127 128#ifdef __KERNEL__ 129extern int ip_mroute_setsockopt(struct sock *, int, char *, int); 130extern int ip_mroute_getsockopt(struct sock *, int, char *, int *); 131extern int ipmr_ioctl(struct sock *sk, int cmd, unsigned long arg); 132extern void ip_mr_init(void); 133 134 135struct vif_device 136{ 137 struct net_device *dev; /* Device we are using */ 138 unsigned long bytes_in,bytes_out; 139 unsigned long pkt_in,pkt_out; /* Statistics */ 140 unsigned long rate_limit; /* Traffic shaping (NI) */ 141 unsigned char threshold; /* TTL threshold */ 142 unsigned short flags; /* Control flags */ 143 __u32 local,remote; /* Addresses(remote for tunnels)*/ 144 int link; /* Physical interface index */ 145}; 146 147#define VIFF_STATIC 0x8000 148 149struct mfc_cache 150{ 151 struct mfc_cache *next; /* Next entry on cache line */ 152 __u32 mfc_mcastgrp; /* Group the entry belongs to */ 153 __u32 mfc_origin; /* Source of packet */ 154 vifi_t mfc_parent; /* Source interface */ 155 int mfc_flags; /* Flags on line */ 156 157 union { 158 struct { 159 unsigned long expires; 160 struct sk_buff_head unresolved; /* Unresolved buffers */ 161 } unres; 162 struct { 163 unsigned long last_assert; 164 int minvif; 165 int maxvif; 166 unsigned long bytes; 167 unsigned long pkt; 168 unsigned long wrong_if; 169 unsigned char ttls[MAXVIFS]; /* TTL thresholds */ 170 } res; 171 } mfc_un; 172}; 173 174#define MFC_STATIC 1 175#define MFC_NOTIFY 2 176 177#define MFC_LINES 64 178 179#ifdef __BIG_ENDIAN 180#define MFC_HASH(a,b) ((((a)>>24)^((b)>>26))&(MFC_LINES-1)) 181#else 182#define MFC_HASH(a,b) (((a)^((b)>>2))&(MFC_LINES-1)) 183#endif 184 185#endif 186 187 188#define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */ 189 190/* 191 * Pseudo messages used by mrouted 192 */ 193 194#define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */ 195#define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */ 196#define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */ 197 198#ifdef __KERNEL__ 199 200#define PIM_V1_VERSION __constant_htonl(0x10000000) 201#define PIM_V1_REGISTER 1 202 203#define PIM_VERSION 2 204#define PIM_REGISTER 1 205 206#define PIM_NULL_REGISTER __constant_htonl(0x40000000) 207 208/* PIMv2 register message header layout (ietf-draft-idmr-pimvsm-v2-00.ps */ 209 210struct pimreghdr 211{ 212 __u8 type; 213 __u8 reserved; 214 __u16 csum; 215 __u32 flags; 216}; 217 218extern int pim_rcv(struct sk_buff *); 219extern int pim_rcv_v1(struct sk_buff *); 220 221struct rtmsg; 222extern int ipmr_get_route(struct sk_buff *skb, struct rtmsg *rtm, int nowait); 223#endif 224 225#endif 226