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 ([email protected]) 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 38 typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */ 39 typedef 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 58 struct 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 80 struct 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 95 struct 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 */ 106 107 struct 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 */ 119 120 struct 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 138 static inline int ip_mroute_opt(int opt) 139 { 140 return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10); 141 } 142 #else 143 static inline int ip_mroute_opt(int opt) 144 { 145 return 0; 146 } 147 #endif 148 149 #ifdef CONFIG_IP_MROUTE 150 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int); 151 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *); 152 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg); 153 extern int ip_mr_init(void); 154 #else 155 static inline 156 int ip_mroute_setsockopt(struct sock *sock, 157 int optname, char __user *optval, unsigned int optlen) 158 { 159 return -ENOPROTOOPT; 160 } 161 162 static inline 163 int ip_mroute_getsockopt(struct sock *sock, 164 int optname, char __user *optval, int __user *optlen) 165 { 166 return -ENOPROTOOPT; 167 } 168 169 static inline 170 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 171 { 172 return -ENOIOCTLCMD; 173 } 174 175 static inline int ip_mr_init(void) 176 { 177 return 0; 178 } 179 #endif 180 181 struct 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 193 194 struct 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__ 244 struct rtmsg; 245 extern int ipmr_get_route(struct net *net, struct sk_buff *skb, 246 struct rtmsg *rtm, int nowait); 247 #endif 248 249 #endif 250