1 /* 2 * netlink-private/netlink.h Local Netlink Interface 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation version 2.1 7 * of the License. 8 * 9 * Copyright (c) 2003-2013 Thomas Graf <tgraf (at) suug.ch> 10 */ 11 12 #ifndef NETLINK_LOCAL_H_ 13 #define NETLINK_LOCAL_H_ 14 15 #include <stdio.h> 16 #include <errno.h> 17 #include <stdlib.h> 18 #include <string.h> 19 #include <unistd.h> 20 #include <fcntl.h> 21 #include <math.h> 22 #include <time.h> 23 #include <stdarg.h> 24 #include <ctype.h> 25 #include <sys/types.h> 26 #include <sys/stat.h> 27 #include <sys/socket.h> 28 #include <inttypes.h> 29 #include <assert.h> 30 #include <limits.h> 31 #include <search.h> 32 33 #include <arpa/inet.h> 34 #include <netdb.h> 35 36 #include <defs.h> 37 38 #ifndef SOL_NETLINK 39 #define SOL_NETLINK 270 40 #endif 41 42 #include <linux/types.h> 43 44 /* local header copies */ 45 #include <linux/if.h> 46 #include <linux/if_arp.h> 47 #include <linux/if_ether.h> 48 #include <linux/ethtool.h> 49 #include <linux/pkt_sched.h> 50 #include <linux/pkt_cls.h> 51 #include <linux/gen_stats.h> 52 #include <linux/ip_mp_alg.h> 53 #include <linux/atm.h> 54 #include <linux/ip.h> 55 #include <linux/ipv6.h> 56 #include <linux/snmp.h> 57 58 #ifndef DISABLE_PTHREADS 59 #include <pthread.h> 60 #endif 61 62 #include <netlink/netlink.h> 63 #include <netlink/handlers.h> 64 #include <netlink/cache.h> 65 #include <netlink/route/tc.h> 66 #include <netlink-private/object-api.h> 67 #include <netlink-private/cache-api.h> 68 #include <netlink-private/types.h> 69 70 #define NSEC_PER_SEC 1000000000L 71 72 struct trans_tbl { 73 int i; 74 const char *a; 75 }; 76 77 #define __ADD(id, name) { .i = id, .a = #name }, 78 79 struct trans_list { 80 int i; 81 char *a; 82 struct nl_list_head list; 83 }; 84 85 #ifdef NL_DEBUG 86 #define NL_DBG(LVL,FMT,ARG...) \ 87 do { \ 88 if (LVL <= nl_debug) \ 89 fprintf(stderr, \ 90 "DBG<" #LVL ">%20s:%-4u %s: " FMT, \ 91 __FILE__, __LINE__, \ 92 __PRETTY_FUNCTION__, ##ARG); \ 93 } while (0) 94 #else /* NL_DEBUG */ 95 #define NL_DBG(LVL,FMT,ARG...) do { } while(0) 96 #endif /* NL_DEBUG */ 97 98 #define BUG() \ 99 do { \ 100 fprintf(stderr, "BUG at file position %s:%d:%s\n", \ 101 __FILE__, __LINE__, __PRETTY_FUNCTION__); \ 102 assert(0); \ 103 } while (0) 104 105 #define BUG_ON(condition) \ 106 do { \ 107 if (condition) \ 108 BUG(); \ 109 } while (0) 110 111 112 #define APPBUG(msg) \ 113 do { \ 114 fprintf(stderr, "APPLICATION BUG: %s:%d:%s: %s\n", \ 115 __FILE__, __LINE__, __PRETTY_FUNCTION__, msg); \ 116 assert(0); \ 117 } while(0) 118 119 extern int __nl_read_num_str_file(const char *path, 120 int (*cb)(long, const char *)); 121 122 extern int __trans_list_add(int, const char *, struct nl_list_head *); 123 extern void __trans_list_clear(struct nl_list_head *); 124 125 extern char *__type2str(int, char *, size_t, const struct trans_tbl *, size_t); 126 extern int __str2type(const char *, const struct trans_tbl *, size_t); 127 128 extern char *__list_type2str(int, char *, size_t, struct nl_list_head *); 129 extern int __list_str2type(const char *, struct nl_list_head *); 130 131 extern char *__flags2str(int, char *, size_t, const struct trans_tbl *, size_t); 132 extern int __str2flags(const char *, const struct trans_tbl *, size_t); 133 134 extern void dump_from_ops(struct nl_object *, struct nl_dump_params *); 135 136 static inline int nl_cb_call(struct nl_cb *cb, int type, struct nl_msg *msg) 137 { 138 int ret; 139 140 cb->cb_active = type; 141 ret = cb->cb_set[type](msg, cb->cb_args[type]); 142 cb->cb_active = __NL_CB_TYPE_MAX; 143 return ret; 144 } 145 146 #define ARRAY_SIZE(X) (sizeof(X) / sizeof((X)[0])) 147 148 /* This is also defined in stddef.h */ 149 #ifndef offsetof 150 #define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER) 151 #endif 152 153 #define __init __attribute__ ((constructor)) 154 #define __exit __attribute__ ((destructor)) 155 #undef __deprecated 156 #define __deprecated __attribute__ ((deprecated)) 157 158 #define min(x,y) ({ \ 159 typeof(x) _x = (x); \ 160 typeof(y) _y = (y); \ 161 (void) (&_x == &_y); \ 162 _x < _y ? _x : _y; }) 163 164 #define max(x,y) ({ \ 165 typeof(x) _x = (x); \ 166 typeof(y) _y = (y); \ 167 (void) (&_x == &_y); \ 168 _x > _y ? _x : _y; }) 169 170 #define min_t(type,x,y) \ 171 ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; }) 172 #define max_t(type,x,y) \ 173 ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; }) 174 175 extern int nl_cache_parse(struct nl_cache_ops *, struct sockaddr_nl *, 176 struct nlmsghdr *, struct nl_parser_param *); 177 178 179 static inline void rtnl_copy_ratespec(struct rtnl_ratespec *dst, 180 struct tc_ratespec *src) 181 { 182 dst->rs_cell_log = src->cell_log; 183 dst->rs_overhead = src->overhead; 184 dst->rs_cell_align = src->cell_align; 185 dst->rs_mpu = src->mpu; 186 dst->rs_rate = src->rate; 187 } 188 189 static inline void rtnl_rcopy_ratespec(struct tc_ratespec *dst, 190 struct rtnl_ratespec *src) 191 { 192 dst->cell_log = src->rs_cell_log; 193 dst->overhead = src->rs_overhead; 194 dst->cell_align = src->rs_cell_align; 195 dst->mpu = src->rs_mpu; 196 dst->rate = src->rs_rate; 197 } 198 199 static inline char *nl_cache_name(struct nl_cache *cache) 200 { 201 return cache->c_ops ? cache->c_ops->co_name : "unknown"; 202 } 203 204 #define GENL_FAMILY(id, name) \ 205 { \ 206 { id, NL_ACT_UNSPEC, name }, \ 207 END_OF_MSGTYPES_LIST, \ 208 } 209 210 static inline int wait_for_ack(struct nl_sock *sk) 211 { 212 if (sk->s_flags & NL_NO_AUTO_ACK) 213 return 0; 214 else 215 return nl_wait_for_ack(sk); 216 } 217 218 static inline int build_sysconf_path(char **strp, const char *filename) 219 { 220 char *sysconfdir; 221 222 sysconfdir = getenv("NLSYSCONFDIR"); 223 224 if (!sysconfdir) 225 sysconfdir = SYSCONFDIR; 226 227 return asprintf(strp, "%s/%s", sysconfdir, filename); 228 } 229 230 #ifndef DISABLE_PTHREADS 231 #define NL_LOCK(NAME) pthread_mutex_t (NAME) = PTHREAD_MUTEX_INITIALIZER 232 #define NL_RW_LOCK(NAME) pthread_rwlock_t (NAME) = PTHREAD_RWLOCK_INITIALIZER 233 234 static inline void nl_lock(pthread_mutex_t *lock) 235 { 236 pthread_mutex_lock(lock); 237 } 238 239 static inline void nl_unlock(pthread_mutex_t *lock) 240 { 241 pthread_mutex_unlock(lock); 242 } 243 244 static inline void nl_read_lock(pthread_rwlock_t *lock) 245 { 246 pthread_rwlock_rdlock(lock); 247 } 248 249 static inline void nl_read_unlock(pthread_rwlock_t *lock) 250 { 251 pthread_rwlock_unlock(lock); 252 } 253 254 static inline void nl_write_lock(pthread_rwlock_t *lock) 255 { 256 pthread_rwlock_wrlock(lock); 257 } 258 259 static inline void nl_write_unlock(pthread_rwlock_t *lock) 260 { 261 pthread_rwlock_unlock(lock); 262 } 263 264 #else 265 #define NL_LOCK(NAME) int __unused_lock_ ##NAME __attribute__((unused)) 266 #define NL_RW_LOCK(NAME) int __unused_lock_ ##NAME __attribute__((unused)) 267 268 #define nl_lock(LOCK) do { } while(0) 269 #define nl_unlock(LOCK) do { } while(0) 270 #define nl_read_lock(LOCK) do { } while(0) 271 #define nl_read_unlock(LOCK) do { } while(0) 272 #define nl_write_lock(LOCK) do { } while(0) 273 #define nl_write_unlock(LOCK) do { } while(0) 274 #endif 275 276 #endif 277
