1 /* 2 * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors: 3 * 4 * Marek Lindner, Simon Wunderlich 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of version 2 of the GNU General Public 8 * License as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 18 * 02110-1301, USA 19 * 20 */ 21 22 #ifndef _NET_BATMAN_ADV_MAIN_H_ 23 #define _NET_BATMAN_ADV_MAIN_H_ 24 25 #define DRIVER_AUTHOR "Marek Lindner <lindner_marek@yahoo.de>, " \ 26 "Simon Wunderlich <siwu@hrz.tu-chemnitz.de>" 27 #define DRIVER_DESC "B.A.T.M.A.N. advanced" 28 #define DRIVER_DEVICE "batman-adv" 29 30 #ifndef SOURCE_VERSION 31 #define SOURCE_VERSION "2012.0.0" 32 #endif 33 34 /* B.A.T.M.A.N. parameters */ 35 36 #define TQ_MAX_VALUE 255 37 #define JITTER 20 38 39 /* Time To Live of broadcast messages */ 40 #define TTL 50 41 42 /* purge originators after time in seconds if no valid packet comes in 43 * -> TODO: check influence on TQ_LOCAL_WINDOW_SIZE */ 44 #define PURGE_TIMEOUT 200 45 #define TT_LOCAL_TIMEOUT 3600 /* in seconds */ 46 #define TT_CLIENT_ROAM_TIMEOUT 600 47 /* sliding packet range of received originator messages in sequence numbers 48 * (should be a multiple of our word size) */ 49 #define TQ_LOCAL_WINDOW_SIZE 64 50 #define TT_REQUEST_TIMEOUT 3 /* seconds we have to keep pending tt_req */ 51 52 #define TQ_GLOBAL_WINDOW_SIZE 5 53 #define TQ_LOCAL_BIDRECT_SEND_MINIMUM 1 54 #define TQ_LOCAL_BIDRECT_RECV_MINIMUM 1 55 #define TQ_TOTAL_BIDRECT_LIMIT 1 56 57 #define TT_OGM_APPEND_MAX 3 /* number of OGMs sent with the last tt diff */ 58 59 #define ROAMING_MAX_TIME 20 /* Time in which a client can roam at most 60 * ROAMING_MAX_COUNT times */ 61 #define ROAMING_MAX_COUNT 5 62 63 #define NO_FLAGS 0 64 65 #define NULL_IFINDEX 0 /* dummy ifindex used to avoid iface checks */ 66 67 #define NUM_WORDS (TQ_LOCAL_WINDOW_SIZE / WORD_BIT_SIZE) 68 69 #define LOG_BUF_LEN 8192 /* has to be a power of 2 */ 70 71 #define VIS_INTERVAL 5000 /* 5 seconds */ 72 73 /* how much worse secondary interfaces may be to be considered as bonding 74 * candidates */ 75 #define BONDING_TQ_THRESHOLD 50 76 77 /* should not be bigger than 512 bytes or change the size of 78 * forw_packet->direct_link_flags */ 79 #define MAX_AGGREGATION_BYTES 512 80 #define MAX_AGGREGATION_MS 100 81 82 #define SOFTIF_NEIGH_TIMEOUT 180000 /* 3 minutes */ 83 84 /* don't reset again within 30 seconds */ 85 #define RESET_PROTECTION_MS 30000 86 #define EXPECTED_SEQNO_RANGE 65536 87 88 enum mesh_state { 89 MESH_INACTIVE, 90 MESH_ACTIVE, 91 MESH_DEACTIVATING 92 }; 93 94 #define BCAST_QUEUE_LEN 256 95 #define BATMAN_QUEUE_LEN 256 96 97 enum uev_action { 98 UEV_ADD = 0, 99 UEV_DEL, 100 UEV_CHANGE 101 }; 102 103 enum uev_type { 104 UEV_GW = 0 105 }; 106 107 #define GW_THRESHOLD 50 108 109 /* 110 * Debug Messages 111 */ 112 #ifdef pr_fmt 113 #undef pr_fmt 114 #endif 115 /* Append 'batman-adv: ' before kernel messages */ 116 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 117 118 /* all messages related to routing / flooding / broadcasting / etc */ 119 enum dbg_level { 120 DBG_BATMAN = 1 << 0, 121 DBG_ROUTES = 1 << 1, /* route added / changed / deleted */ 122 DBG_TT = 1 << 2, /* translation table operations */ 123 DBG_ALL = 7 124 }; 125 126 127 /* 128 * Vis 129 */ 130 131 /* 132 * Kernel headers 133 */ 134 135 #include <linux/mutex.h> /* mutex */ 136 #include <linux/module.h> /* needed by all modules */ 137 #include <linux/netdevice.h> /* netdevice */ 138 #include <linux/etherdevice.h> /* ethernet address classification */ 139 #include <linux/if_ether.h> /* ethernet header */ 140 #include <linux/poll.h> /* poll_table */ 141 #include <linux/kthread.h> /* kernel threads */ 142 #include <linux/pkt_sched.h> /* schedule types */ 143 #include <linux/workqueue.h> /* workqueue */ 144 #include <linux/slab.h> 145 #include <net/sock.h> /* struct sock */ 146 #include <linux/jiffies.h> 147 #include <linux/seq_file.h> 148 #include "types.h" 149 150 extern struct list_head hardif_list; 151 152 extern unsigned char broadcast_addr[]; 153 extern struct workqueue_struct *bat_event_workqueue; 154 155 int mesh_init(struct net_device *soft_iface); 156 void mesh_free(struct net_device *soft_iface); 157 void inc_module_count(void); 158 void dec_module_count(void); 159 int is_my_mac(const uint8_t *addr); 160 161 #ifdef CONFIG_BATMAN_ADV_DEBUG 162 int debug_log(struct bat_priv *bat_priv, const char *fmt, ...) __printf(2, 3); 163 164 #define bat_dbg(type, bat_priv, fmt, arg...) \ 165 do { \ 166 if (atomic_read(&bat_priv->log_level) & type) \ 167 debug_log(bat_priv, fmt, ## arg); \ 168 } \ 169 while (0) 170 #else /* !CONFIG_BATMAN_ADV_DEBUG */ 171 __printf(3, 4) 172 static inline void bat_dbg(int type __always_unused, 173 struct bat_priv *bat_priv __always_unused, 174 const char *fmt __always_unused, ...) 175 { 176 } 177 #endif 178 179 #define bat_info(net_dev, fmt, arg...) \ 180 do { \ 181 struct net_device *_netdev = (net_dev); \ 182 struct bat_priv *_batpriv = netdev_priv(_netdev); \ 183 bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \ 184 pr_info("%s: " fmt, _netdev->name, ## arg); \ 185 } while (0) 186 #define bat_err(net_dev, fmt, arg...) \ 187 do { \ 188 struct net_device *_netdev = (net_dev); \ 189 struct bat_priv *_batpriv = netdev_priv(_netdev); \ 190 bat_dbg(DBG_ALL, _batpriv, fmt, ## arg); \ 191 pr_err("%s: " fmt, _netdev->name, ## arg); \ 192 } while (0) 193 194 /** 195 * returns 1 if they are the same ethernet addr 196 * 197 * note: can't use compare_ether_addr() as it requires aligned memory 198 */ 199 200 static inline int compare_eth(const void *data1, const void *data2) 201 { 202 return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0); 203 } 204 205 206 #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0) 207 208 /* Returns the smallest signed integer in two's complement with the sizeof x */ 209 #define smallest_signed_int(x) (1u << (7u + 8u * (sizeof(x) - 1u))) 210 211 /* Checks if a sequence number x is a predecessor/successor of y. 212 * they handle overflows/underflows and can correctly check for a 213 * predecessor/successor unless the variable sequence number has grown by 214 * more then 2**(bitwidth(x)-1)-1. 215 * This means that for a uint8_t with the maximum value 255, it would think: 216 * - when adding nothing - it is neither a predecessor nor a successor 217 * - before adding more than 127 to the starting value - it is a predecessor, 218 * - when adding 128 - it is neither a predecessor nor a successor, 219 * - after adding more than 127 to the starting value - it is a successor */ 220 #define seq_before(x, y) ({typeof(x) _d1 = (x); \ 221 typeof(y) _d2 = (y); \ 222 typeof(x) _dummy = (_d1 - _d2); \ 223 (void) (&_d1 == &_d2); \ 224 _dummy > smallest_signed_int(_dummy); }) 225 #define seq_after(x, y) seq_before(y, x) 226 227 #endif /* _NET_BATMAN_ADV_MAIN_H_ */ 228