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Diffstat (limited to 'src/dns/plugin_block_dns.c')
-rw-r--r--src/dns/plugin_block_dns.c193
1 files changed, 97 insertions, 96 deletions
diff --git a/src/dns/plugin_block_dns.c b/src/dns/plugin_block_dns.c
index fd4d844c5..fc07a4073 100644
--- a/src/dns/plugin_block_dns.c
+++ b/src/dns/plugin_block_dns.c
@@ -54,37 +54,38 @@
54 * by this @a type of block (this is not an error) 54 * by this @a type of block (this is not an error)
55 */ 55 */
56static struct GNUNET_BLOCK_Group * 56static struct GNUNET_BLOCK_Group *
57block_plugin_dns_create_group(void *cls, 57block_plugin_dns_create_group (void *cls,
58 enum GNUNET_BLOCK_Type type, 58 enum GNUNET_BLOCK_Type type,
59 uint32_t nonce, 59 uint32_t nonce,
60 const void *raw_data, 60 const void *raw_data,
61 size_t raw_data_size, 61 size_t raw_data_size,
62 va_list va) 62 va_list va)
63{ 63{
64 unsigned int bf_size; 64 unsigned int bf_size;
65 const char *guard; 65 const char *guard;
66 66
67 guard = va_arg(va, const char *); 67 guard = va_arg (va, const char *);
68 if (0 == strcmp(guard, 68 if (0 == strcmp (guard,
69 "seen-set-size")) 69 "seen-set-size"))
70 bf_size = GNUNET_BLOCK_GROUP_compute_bloomfilter_size(va_arg(va, unsigned int), 70 bf_size = GNUNET_BLOCK_GROUP_compute_bloomfilter_size (va_arg (va, unsigned
71 BLOOMFILTER_K); 71 int),
72 else if (0 == strcmp(guard, 72 BLOOMFILTER_K);
73 "filter-size")) 73 else if (0 == strcmp (guard,
74 bf_size = va_arg(va, unsigned int); 74 "filter-size"))
75 bf_size = va_arg (va, unsigned int);
75 else 76 else
76 { 77 {
77 GNUNET_break(0); 78 GNUNET_break (0);
78 bf_size = 8; 79 bf_size = 8;
79 } 80 }
80 GNUNET_break(NULL == va_arg(va, const char *)); 81 GNUNET_break (NULL == va_arg (va, const char *));
81 return GNUNET_BLOCK_GROUP_bf_create(cls, 82 return GNUNET_BLOCK_GROUP_bf_create (cls,
82 bf_size, 83 bf_size,
83 BLOOMFILTER_K, 84 BLOOMFILTER_K,
84 type, 85 type,
85 nonce, 86 nonce,
86 raw_data, 87 raw_data,
87 raw_data_size); 88 raw_data_size);
88} 89}
89 90
90 91
@@ -105,72 +106,73 @@ block_plugin_dns_create_group(void *cls,
105 * @return characterization of result 106 * @return characterization of result
106 */ 107 */
107static enum GNUNET_BLOCK_EvaluationResult 108static enum GNUNET_BLOCK_EvaluationResult
108block_plugin_dns_evaluate(void *cls, 109block_plugin_dns_evaluate (void *cls,
109 struct GNUNET_BLOCK_Context *ctx, 110 struct GNUNET_BLOCK_Context *ctx,
110 enum GNUNET_BLOCK_Type type, 111 enum GNUNET_BLOCK_Type type,
111 struct GNUNET_BLOCK_Group *bg, 112 struct GNUNET_BLOCK_Group *bg,
112 enum GNUNET_BLOCK_EvaluationOptions eo, 113 enum GNUNET_BLOCK_EvaluationOptions eo,
113 const struct GNUNET_HashCode * query, 114 const struct GNUNET_HashCode *query,
114 const void *xquery, 115 const void *xquery,
115 size_t xquery_size, 116 size_t xquery_size,
116 const void *reply_block, 117 const void *reply_block,
117 size_t reply_block_size) 118 size_t reply_block_size)
118{ 119{
119 const struct GNUNET_DNS_Advertisement *ad; 120 const struct GNUNET_DNS_Advertisement *ad;
120 struct GNUNET_HashCode phash; 121 struct GNUNET_HashCode phash;
121 122
122 switch (type) 123 switch (type)
124 {
125 case GNUNET_BLOCK_TYPE_DNS:
126 if (0 != xquery_size)
127 return GNUNET_BLOCK_EVALUATION_REQUEST_INVALID;
128
129 if (NULL == reply_block)
130 return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
131
132 if (sizeof(struct GNUNET_DNS_Advertisement) != reply_block_size)
133 {
134 GNUNET_break_op (0);
135 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
136 }
137 ad = reply_block;
138
139 if (ntohl (ad->purpose.size) !=
140 sizeof(struct GNUNET_DNS_Advertisement)
141 - sizeof(struct GNUNET_CRYPTO_EddsaSignature))
142 {
143 GNUNET_break_op (0);
144 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
145 }
146 if (0 ==
147 GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh
148 (ad->expiration_time)).
149 rel_value_us)
123 { 150 {
124 case GNUNET_BLOCK_TYPE_DNS: 151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
125 if (0 != xquery_size) 152 "DNS advertisement has expired\n");
126 return GNUNET_BLOCK_EVALUATION_REQUEST_INVALID; 153 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
127
128 if (NULL == reply_block)
129 return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
130
131 if (sizeof(struct GNUNET_DNS_Advertisement) != reply_block_size)
132 {
133 GNUNET_break_op(0);
134 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
135 }
136 ad = reply_block;
137
138 if (ntohl(ad->purpose.size) !=
139 sizeof(struct GNUNET_DNS_Advertisement) -
140 sizeof(struct GNUNET_CRYPTO_EddsaSignature))
141 {
142 GNUNET_break_op(0);
143 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
144 }
145 if (0 ==
146 GNUNET_TIME_absolute_get_remaining(GNUNET_TIME_absolute_ntoh
147 (ad->expiration_time)).rel_value_us)
148 {
149 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
150 "DNS advertisement has expired\n");
151 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
152 }
153 if (GNUNET_OK !=
154 GNUNET_CRYPTO_eddsa_verify(GNUNET_SIGNATURE_PURPOSE_DNS_RECORD,
155 &ad->purpose,
156 &ad->signature,
157 &ad->peer.public_key))
158 {
159 GNUNET_break_op(0);
160 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
161 }
162 GNUNET_CRYPTO_hash(reply_block,
163 reply_block_size,
164 &phash);
165 if (GNUNET_YES ==
166 GNUNET_BLOCK_GROUP_bf_test_and_set(bg,
167 &phash))
168 return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
169 return GNUNET_BLOCK_EVALUATION_OK_MORE;
170
171 default:
172 return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
173 } 154 }
155 if (GNUNET_OK !=
156 GNUNET_CRYPTO_eddsa_verify (GNUNET_SIGNATURE_PURPOSE_DNS_RECORD,
157 &ad->purpose,
158 &ad->signature,
159 &ad->peer.public_key))
160 {
161 GNUNET_break_op (0);
162 return GNUNET_BLOCK_EVALUATION_RESULT_INVALID;
163 }
164 GNUNET_CRYPTO_hash (reply_block,
165 reply_block_size,
166 &phash);
167 if (GNUNET_YES ==
168 GNUNET_BLOCK_GROUP_bf_test_and_set (bg,
169 &phash))
170 return GNUNET_BLOCK_EVALUATION_OK_DUPLICATE;
171 return GNUNET_BLOCK_EVALUATION_OK_MORE;
172
173 default:
174 return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED;
175 }
174} 176}
175 177
176 178
@@ -186,11 +188,11 @@ block_plugin_dns_evaluate(void *cls,
186 * (or if extracting a key from a block of this type does not work) 188 * (or if extracting a key from a block of this type does not work)
187 */ 189 */
188static int 190static int
189block_plugin_dns_get_key(void *cls, 191block_plugin_dns_get_key (void *cls,
190 enum GNUNET_BLOCK_Type type, 192 enum GNUNET_BLOCK_Type type,
191 const void *block, 193 const void *block,
192 size_t block_size, 194 size_t block_size,
193 struct GNUNET_HashCode *key) 195 struct GNUNET_HashCode *key)
194{ 196{
195 /* we cannot extract a key from a block of this type */ 197 /* we cannot extract a key from a block of this type */
196 return GNUNET_SYSERR; 198 return GNUNET_SYSERR;
@@ -201,16 +203,15 @@ block_plugin_dns_get_key(void *cls,
201 * Entry point for the plugin. 203 * Entry point for the plugin.
202 */ 204 */
203void * 205void *
204libgnunet_plugin_block_dns_init(void *cls) 206libgnunet_plugin_block_dns_init (void *cls)
205{ 207{
206 static enum GNUNET_BLOCK_Type types[] = 208 static enum GNUNET_BLOCK_Type types[] = {
207 {
208 GNUNET_BLOCK_TYPE_DNS, 209 GNUNET_BLOCK_TYPE_DNS,
209 GNUNET_BLOCK_TYPE_ANY /* end of list */ 210 GNUNET_BLOCK_TYPE_ANY /* end of list */
210 }; 211 };
211 struct GNUNET_BLOCK_PluginFunctions *api; 212 struct GNUNET_BLOCK_PluginFunctions *api;
212 213
213 api = GNUNET_new(struct GNUNET_BLOCK_PluginFunctions); 214 api = GNUNET_new (struct GNUNET_BLOCK_PluginFunctions);
214 api->evaluate = &block_plugin_dns_evaluate; 215 api->evaluate = &block_plugin_dns_evaluate;
215 api->get_key = &block_plugin_dns_get_key; 216 api->get_key = &block_plugin_dns_get_key;
216 api->create_group = &block_plugin_dns_create_group; 217 api->create_group = &block_plugin_dns_create_group;
@@ -223,11 +224,11 @@ libgnunet_plugin_block_dns_init(void *cls)
223 * Exit point from the plugin. 224 * Exit point from the plugin.
224 */ 225 */
225void * 226void *
226libgnunet_plugin_block_dns_done(void *cls) 227libgnunet_plugin_block_dns_done (void *cls)
227{ 228{
228 struct GNUNET_BLOCK_PluginFunctions *api = cls; 229 struct GNUNET_BLOCK_PluginFunctions *api = cls;
229 230
230 GNUNET_free(api); 231 GNUNET_free (api);
231 return NULL; 232 return NULL;
232} 233}
233 234
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 10:03:07 +0000