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@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
72struct trans_tbl {
73	int i;
74	const char *a;
75};
76
77#define __ADD(id, name) { .i = id, .a = #name },
78
79struct 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
119extern int __nl_read_num_str_file(const char *path,
120				  int (*cb)(long, const char *));
121
122extern int __trans_list_add(int, const char *, struct nl_list_head *);
123extern void __trans_list_clear(struct nl_list_head *);
124
125extern char *__type2str(int, char *, size_t, const struct trans_tbl *, size_t);
126extern int __str2type(const char *, const struct trans_tbl *, size_t);
127
128extern char *__list_type2str(int, char *, size_t, struct nl_list_head *);
129extern int __list_str2type(const char *, struct nl_list_head *);
130
131extern char *__flags2str(int, char *, size_t, const struct trans_tbl *, size_t);
132extern int __str2flags(const char *, const struct trans_tbl *, size_t);
133
134extern void dump_from_ops(struct nl_object *, struct nl_dump_params *);
135
136static 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
175extern int nl_cache_parse(struct nl_cache_ops *, struct sockaddr_nl *,
176			  struct nlmsghdr *, struct nl_parser_param *);
177
178
179static 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
189static 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
199static 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
210static 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
218static 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
234static inline void nl_lock(pthread_mutex_t *lock)
235{
236	pthread_mutex_lock(lock);
237}
238
239static inline void nl_unlock(pthread_mutex_t *lock)
240{
241	pthread_mutex_unlock(lock);
242}
243
244static inline void nl_read_lock(pthread_rwlock_t *lock)
245{
246	pthread_rwlock_rdlock(lock);
247}
248
249static inline void nl_read_unlock(pthread_rwlock_t *lock)
250{
251	pthread_rwlock_unlock(lock);
252}
253
254static inline void nl_write_lock(pthread_rwlock_t *lock)
255{
256	pthread_rwlock_wrlock(lock);
257}
258
259static 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