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1 office 1 /*
2 * lib/netfilter/log_obj.c Netfilter Log Object
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) 2003-2008 Thomas Graf <tgraf@suug.ch>
10 * Copyright (c) 2007 Philip Craig <philipc@snapgear.com>
11 * Copyright (c) 2007 Secure Computing Corporation
12 * Copyright (c) 2008 Patrick McHardy <kaber@trash.net>
13 */
14  
15 #include <netlink-local.h>
16 #include <netlink/netfilter/nfnl.h>
17 #include <netlink/netfilter/log.h>
18  
19 /** @cond SKIP */
20 #define LOG_ATTR_GROUP (1UL << 0)
21 #define LOG_ATTR_COPY_MODE (1UL << 1)
22 #define LOG_ATTR_COPY_RANGE (1UL << 3)
23 #define LOG_ATTR_FLUSH_TIMEOUT (1UL << 4)
24 #define LOG_ATTR_ALLOC_SIZE (1UL << 5)
25 #define LOG_ATTR_QUEUE_THRESHOLD (1UL << 6)
26  
27 /** @endcond */
28  
29 static void nfnl_log_dump(struct nl_object *a, struct nl_dump_params *p)
30 {
31 struct nfnl_log *log = (struct nfnl_log *) a;
32 char buf[64];
33  
34 nl_new_line(p);
35  
36 if (log->ce_mask & LOG_ATTR_GROUP)
37 nl_dump(p, "group=%u ", log->log_group);
38  
39 if (log->ce_mask & LOG_ATTR_COPY_MODE)
40 nl_dump(p, "copy_mode=%s ",
41 nfnl_log_copy_mode2str(log->log_copy_mode,
42 buf, sizeof(buf)));
43  
44 if (log->ce_mask & LOG_ATTR_COPY_RANGE)
45 nl_dump(p, "copy_range=%u ", log->log_copy_range);
46  
47 if (log->ce_mask & LOG_ATTR_FLUSH_TIMEOUT)
48 nl_dump(p, "flush_timeout=%u ", log->log_flush_timeout);
49  
50 if (log->ce_mask & LOG_ATTR_ALLOC_SIZE)
51 nl_dump(p, "alloc_size=%u ", log->log_alloc_size);
52  
53 if (log->ce_mask & LOG_ATTR_QUEUE_THRESHOLD)
54 nl_dump(p, "queue_threshold=%u ", log->log_queue_threshold);
55  
56 nl_dump(p, "\n");
57 }
58  
59 static struct trans_tbl copy_modes[] = {
60 __ADD(NFNL_LOG_COPY_NONE, none)
61 __ADD(NFNL_LOG_COPY_META, meta)
62 __ADD(NFNL_LOG_COPY_PACKET, packet)
63 };
64  
65 char *nfnl_log_copy_mode2str(enum nfnl_log_copy_mode copy_mode, char *buf,
66 size_t len)
67 {
68 return __type2str(copy_mode, buf, len, copy_modes,
69 ARRAY_SIZE(copy_modes));
70 }
71  
72 enum nfnl_log_copy_mode nfnl_log_str2copy_mode(const char *name)
73 {
74 return __str2type(name, copy_modes, ARRAY_SIZE(copy_modes));
75 }
76  
77 /**
78 * @name Allocation/Freeing
79 * @{
80 */
81  
82 struct nfnl_log *nfnl_log_alloc(void)
83 {
84 return (struct nfnl_log *) nl_object_alloc(&log_obj_ops);
85 }
86  
87 void nfnl_log_get(struct nfnl_log *log)
88 {
89 nl_object_get((struct nl_object *) log);
90 }
91  
92 void nfnl_log_put(struct nfnl_log *log)
93 {
94 nl_object_put((struct nl_object *) log);
95 }
96  
97 /** @} */
98  
99 /**
100 * @name Attributes
101 * @{
102 */
103  
104 void nfnl_log_set_group(struct nfnl_log *log, uint16_t group)
105 {
106 log->log_group = group;
107 log->ce_mask |= LOG_ATTR_GROUP;
108 }
109  
110 int nfnl_log_test_group(const struct nfnl_log *log)
111 {
112 return !!(log->ce_mask & LOG_ATTR_GROUP);
113 }
114  
115 uint16_t nfnl_log_get_group(const struct nfnl_log *log)
116 {
117 return log->log_group;
118 }
119  
120 void nfnl_log_set_copy_mode(struct nfnl_log *log, enum nfnl_log_copy_mode mode)
121 {
122 log->log_copy_mode = mode;
123 log->ce_mask |= LOG_ATTR_COPY_MODE;
124 }
125  
126 int nfnl_log_test_copy_mode(const struct nfnl_log *log)
127 {
128 return !!(log->ce_mask & LOG_ATTR_COPY_MODE);
129 }
130  
131 enum nfnl_log_copy_mode nfnl_log_get_copy_mode(const struct nfnl_log *log)
132 {
133 return log->log_copy_mode;
134 }
135  
136 void nfnl_log_set_copy_range(struct nfnl_log *log, uint32_t copy_range)
137 {
138 log->log_copy_range = copy_range;
139 log->ce_mask |= LOG_ATTR_COPY_RANGE;
140 }
141  
142 int nfnl_log_test_copy_range(const struct nfnl_log *log)
143 {
144 return !!(log->ce_mask & LOG_ATTR_COPY_RANGE);
145 }
146  
147 uint32_t nfnl_log_get_copy_range(const struct nfnl_log *log)
148 {
149 return log->log_copy_range;
150 }
151  
152 void nfnl_log_set_flush_timeout(struct nfnl_log *log, uint32_t timeout)
153 {
154 log->log_flush_timeout = timeout;
155 log->ce_mask |= LOG_ATTR_FLUSH_TIMEOUT;
156 }
157  
158 int nfnl_log_test_flush_timeout(const struct nfnl_log *log)
159 {
160 return !!(log->ce_mask & LOG_ATTR_FLUSH_TIMEOUT);
161 }
162  
163 uint32_t nfnl_log_get_flush_timeout(const struct nfnl_log *log)
164 {
165 return log->log_flush_timeout;
166 }
167  
168 void nfnl_log_set_alloc_size(struct nfnl_log *log, uint32_t alloc_size)
169 {
170 log->log_alloc_size = alloc_size;
171 log->ce_mask |= LOG_ATTR_ALLOC_SIZE;
172 }
173  
174 int nfnl_log_test_alloc_size(const struct nfnl_log *log)
175 {
176 return !!(log->ce_mask & LOG_ATTR_ALLOC_SIZE);
177 }
178  
179 uint32_t nfnl_log_get_alloc_size(const struct nfnl_log *log)
180 {
181 return log->log_alloc_size;
182 }
183  
184 void nfnl_log_set_queue_threshold(struct nfnl_log *log, uint32_t threshold)
185 {
186 log->log_queue_threshold = threshold;
187 log->ce_mask |= LOG_ATTR_QUEUE_THRESHOLD;
188 }
189  
190 int nfnl_log_test_queue_threshold(const struct nfnl_log *log)
191 {
192 return !!(log->ce_mask & LOG_ATTR_QUEUE_THRESHOLD);
193 }
194  
195 uint32_t nfnl_log_get_queue_threshold(const struct nfnl_log *log)
196 {
197 return log->log_queue_threshold;
198 }
199  
200 /* We don't actually use the flags for anything yet since the
201 * nfnetlog_log interface truly sucks - it only contains the
202 * flag value, but not mask, so we would have to make assumptions
203 * about the supported flags.
204 */
205 void nfnl_log_set_flags(struct nfnl_log *log, unsigned int flags)
206 {
207 log->log_flags |= flags;
208 log->log_flag_mask |= flags;
209 }
210  
211 void nfnl_log_unset_flags(struct nfnl_log *log, unsigned int flags)
212 {
213 log->log_flags &= ~flags;
214 log->log_flag_mask |= flags;
215 }
216  
217 static struct trans_tbl log_flags[] = {
218 __ADD(NFNL_LOG_FLAG_SEQ, seq)
219 __ADD(NFNL_LOG_FLAG_SEQ_GLOBAL, seq_global)
220 };
221  
222 char *nfnl_log_flags2str(unsigned int flags, char *buf, size_t len)
223 {
224 return __flags2str(flags, buf, len, log_flags, ARRAY_SIZE(log_flags));
225 }
226  
227 unsigned int nfnl_log_str2flags(const char *name)
228 {
229 return __str2flags(name, log_flags, ARRAY_SIZE(log_flags));
230 }
231  
232 static int nfnl_log_compare(struct nl_object *_a, struct nl_object *_b,
233 uint32_t attrs, int flags)
234 {
235 struct nfnl_log *a = (struct nfnl_log *) _a;
236 struct nfnl_log *b = (struct nfnl_log *) _b;
237 int diff = 0;
238  
239 #define NFNL_LOG_DIFF(ATTR, EXPR) \
240 ATTR_DIFF(attrs, LOG_ATTR_##ATTR, a, b, EXPR)
241 #define NFNL_LOG_DIFF_VAL(ATTR, FIELD) \
242 NFNL_LOG_DIFF(ATTR, a->FIELD != b->FIELD)
243  
244 diff |= NFNL_LOG_DIFF_VAL(GROUP, log_group);
245 diff |= NFNL_LOG_DIFF_VAL(COPY_MODE, log_copy_mode);
246 diff |= NFNL_LOG_DIFF_VAL(COPY_RANGE, log_copy_range);
247 diff |= NFNL_LOG_DIFF_VAL(FLUSH_TIMEOUT, log_flush_timeout);
248 diff |= NFNL_LOG_DIFF_VAL(ALLOC_SIZE, log_alloc_size);
249 diff |= NFNL_LOG_DIFF_VAL(QUEUE_THRESHOLD, log_queue_threshold);
250  
251 #undef NFNL_LOG_DIFF
252 #undef NFNL_LOG_DIFF_VAL
253  
254 return diff;
255 }
256  
257 static struct trans_tbl nfnl_log_attrs[] = {
258 __ADD(LOG_ATTR_GROUP, group)
259 __ADD(LOG_ATTR_COPY_MODE, copy_mode)
260 __ADD(LOG_ATTR_COPY_RANGE, copy_range)
261 __ADD(LOG_ATTR_FLUSH_TIMEOUT, flush_timeout)
262 __ADD(LOG_ATTR_ALLOC_SIZE, alloc_size)
263 __ADD(LOG_ATTR_QUEUE_THRESHOLD, queue_threshold)
264 };
265  
266 static char *nfnl_log_attrs2str(int attrs, char *buf, size_t len)
267 {
268 return __flags2str(attrs, buf, len, nfnl_log_attrs,
269 ARRAY_SIZE(nfnl_log_attrs));
270 }
271  
272 /** @} */
273  
274 struct nl_object_ops log_obj_ops = {
275 .oo_name = "netfilter/log",
276 .oo_size = sizeof(struct nfnl_log),
277 .oo_dump = {
278 [NL_DUMP_LINE] = nfnl_log_dump,
279 [NL_DUMP_DETAILS] = nfnl_log_dump,
280 [NL_DUMP_STATS] = nfnl_log_dump,
281 },
282 .oo_compare = nfnl_log_compare,
283 .oo_attrs2str = nfnl_log_attrs2str,
284 .oo_id_attrs = LOG_ATTR_GROUP,
285 };
286  
287 /** @} */