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 32 #define SIOCGETVIFCNT SIOCPROTOPRIVATE /* IP protocol privates */ 33 #define SIOCGETSGCNT (SIOCPROTOPRIVATE+1) 34 #define SIOCGETRPF (SIOCPROTOPRIVATE+2) 35 36 #define MAXVIFS 32 37 typedef unsigned long vifbitmap_t; /* User mode code depends on this lot */ 38 typedef 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 57 struct 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 union { 63 struct in_addr vifc_lcl_addr; /* Local interface address */ 64 int vifc_lcl_ifindex; /* Local interface index */ 65 }; 66 struct in_addr vifc_rmt_addr; /* IPIP tunnel addr */ 67 }; 68 69 #define VIFF_TUNNEL 0x1 /* IPIP tunnel */ 70 #define VIFF_SRCRT 0x2 /* NI */ 71 #define VIFF_REGISTER 0x4 /* register vif */ 72 #define VIFF_USE_IFINDEX 0x8 /* use vifc_lcl_ifindex instead of 73 vifc_lcl_addr to find an interface */ 74 75 /* 76 * Cache manipulation structures for mrouted and PIMd 77 */ 78 79 struct mfcctl { 80 struct in_addr mfcc_origin; /* Origin of mcast */ 81 struct in_addr mfcc_mcastgrp; /* Group in question */ 82 vifi_t mfcc_parent; /* Where it arrived */ 83 unsigned char mfcc_ttls[MAXVIFS]; /* Where it is going */ 84 unsigned int mfcc_pkt_cnt; /* pkt count for src-grp */ 85 unsigned int mfcc_byte_cnt; 86 unsigned int mfcc_wrong_if; 87 int mfcc_expire; 88 }; 89 90 /* 91 * Group count retrieval for mrouted 92 */ 93 94 struct sioc_sg_req { 95 struct in_addr src; 96 struct in_addr grp; 97 unsigned long pktcnt; 98 unsigned long bytecnt; 99 unsigned long wrong_if; 100 }; 101 102 /* 103 * To get vif packet counts 104 */ 105 106 struct sioc_vif_req { 107 vifi_t vifi; /* Which iface */ 108 unsigned long icount; /* In packets */ 109 unsigned long ocount; /* Out packets */ 110 unsigned long ibytes; /* In bytes */ 111 unsigned long obytes; /* Out bytes */ 112 }; 113 114 /* 115 * This is the format the mroute daemon expects to see IGMP control 116 * data. Magically happens to be like an IP packet as per the original 117 */ 118 119 struct igmpmsg { 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 <linux/pim.h> 134 #include <net/sock.h> 135 136 #ifdef CONFIG_IP_MROUTE 137 static inline int ip_mroute_opt(int opt) 138 { 139 return (opt >= MRT_BASE) && (opt <= MRT_BASE + 10); 140 } 141 #else 142 static inline int ip_mroute_opt(int opt) 143 { 144 return 0; 145 } 146 #endif 147 148 #ifdef CONFIG_IP_MROUTE 149 extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int); 150 extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *); 151 extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg); 152 extern int ip_mr_init(void); 153 #else 154 static inline 155 int ip_mroute_setsockopt(struct sock *sock, 156 int optname, char __user *optval, unsigned int optlen) 157 { 158 return -ENOPROTOOPT; 159 } 160 161 static inline 162 int ip_mroute_getsockopt(struct sock *sock, 163 int optname, char __user *optval, int __user *optlen) 164 { 165 return -ENOPROTOOPT; 166 } 167 168 static inline 169 int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg) 170 { 171 return -ENOIOCTLCMD; 172 } 173 174 static inline int ip_mr_init(void) 175 { 176 return 0; 177 } 178 #endif 179 180 struct vif_device { 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 192 193 struct mfc_cache { 194 struct mfc_cache *next; /* Next entry on cache line */ 195 #ifdef CONFIG_NET_NS 196 struct net *mfc_net; 197 #endif 198 __be32 mfc_mcastgrp; /* Group the entry belongs to */ 199 __be32 mfc_origin; /* Source of packet */ 200 vifi_t mfc_parent; /* Source interface */ 201 int mfc_flags; /* Flags on line */ 202 203 union { 204 struct { 205 unsigned long expires; 206 struct sk_buff_head unresolved; /* Unresolved buffers */ 207 } unres; 208 struct { 209 unsigned long last_assert; 210 int minvif; 211 int maxvif; 212 unsigned long bytes; 213 unsigned long pkt; 214 unsigned long wrong_if; 215 unsigned char ttls[MAXVIFS]; /* TTL thresholds */ 216 } res; 217 } mfc_un; 218 }; 219 220 static inline 221 struct net *mfc_net(const struct mfc_cache *mfc) 222 { 223 return read_pnet(&mfc->mfc_net); 224 } 225 226 static inline 227 void mfc_net_set(struct mfc_cache *mfc, struct net *net) 228 { 229 write_pnet(&mfc->mfc_net, hold_net(net)); 230 } 231 232 #define MFC_STATIC 1 233 #define MFC_NOTIFY 2 234 235 #define MFC_LINES 64 236 237 #ifdef __BIG_ENDIAN 238 #define MFC_HASH(a,b) (((((__force u32)(__be32)a)>>24)^(((__force u32)(__be32)b)>>26))&(MFC_LINES-1)) 239 #else 240 #define MFC_HASH(a,b) ((((__force u32)(__be32)a)^(((__force u32)(__be32)b)>>2))&(MFC_LINES-1)) 241 #endif 242 243 #endif 244 245 246 #define MFC_ASSERT_THRESH (3*HZ) /* Maximal freq. of asserts */ 247 248 /* 249 * Pseudo messages used by mrouted 250 */ 251 252 #define IGMPMSG_NOCACHE 1 /* Kern cache fill request to mrouted */ 253 #define IGMPMSG_WRONGVIF 2 /* For PIM assert processing (unused) */ 254 #define IGMPMSG_WHOLEPKT 3 /* For PIM Register processing */ 255 256 #ifdef __KERNEL__ 257 struct rtmsg; 258 extern int ipmr_get_route(struct net *net, struct sk_buff *skb, 259 struct rtmsg *rtm, int nowait); 260 #endif 261 262 #endif 263