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author | Christian Grothoff <christian@grothoff.org> | 2018-11-22 22:04:48 +0100 |
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committer | Christian Grothoff <christian@grothoff.org> | 2018-11-22 22:04:48 +0100 |
commit | c87f73a07df468eccedbe1fdfa82bdd5b633a0d5 (patch) | |
tree | 0bb3f63e727a65dc84c33a03229b6760edee82ee /src/nt | |
parent | dd7379052f3749d87d8c35969ec94b4580e998b5 (diff) | |
download | gnunet-c87f73a07df468eccedbe1fdfa82bdd5b633a0d5.tar.gz gnunet-c87f73a07df468eccedbe1fdfa82bdd5b633a0d5.zip |
move network type logic out of ATS code, move performance preferences into MQ
Diffstat (limited to 'src/nt')
-rw-r--r-- | src/nt/Makefile.am | 36 | ||||
-rw-r--r-- | src/nt/nt.c | 410 |
2 files changed, 446 insertions, 0 deletions
diff --git a/src/nt/Makefile.am b/src/nt/Makefile.am new file mode 100644 index 000000000..68b6a55e7 --- /dev/null +++ b/src/nt/Makefile.am | |||
@@ -0,0 +1,36 @@ | |||
1 | # This Makefile.am is in the public domain | ||
2 | AM_CPPFLAGS = -I$(top_srcdir)/src/include | ||
3 | |||
4 | if MINGW | ||
5 | WINFLAGS = -Wl,--no-undefined -Wl,--export-all-symbols | ||
6 | endif | ||
7 | |||
8 | if USE_COVERAGE | ||
9 | AM_CFLAGS = --coverage | ||
10 | endif | ||
11 | |||
12 | lib_LTLIBRARIES = libgnunetnt.la | ||
13 | |||
14 | libgnunetnt_la_SOURCES = \ | ||
15 | nt.c | ||
16 | |||
17 | libgnunetnt_la_LIBADD = \ | ||
18 | $(top_builddir)/src/util/libgnunetutil.la | ||
19 | libgnunetnt_la_LDFLAGS = \ | ||
20 | $(GN_LIB_LDFLAGS) \ | ||
21 | -version-info 0:0:0 | ||
22 | |||
23 | #if ENABLE_TEST_RUN | ||
24 | #TESTS = \ | ||
25 | # test_nt | ||
26 | #endif | ||
27 | |||
28 | #check_PROGRAMS= \ | ||
29 | # test_nt | ||
30 | # | ||
31 | #test_nt_SOURCES = \ | ||
32 | # test_nt.c | ||
33 | #test_nt_LDADD = \ | ||
34 | # libgnunetnt.la \ | ||
35 | # $(top_builddir)/src/util/libgnunetutil.la \ | ||
36 | # $(XLIB) | ||
diff --git a/src/nt/nt.c b/src/nt/nt.c new file mode 100644 index 000000000..5764f8f4a --- /dev/null +++ b/src/nt/nt.c | |||
@@ -0,0 +1,410 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2010-2015, 2018 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet 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 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | */ | ||
18 | /** | ||
19 | * @file nt/nt_api_scanner.c | ||
20 | * @brief LAN interface scanning to determine IPs in LAN | ||
21 | * @author Christian Grothoff | ||
22 | * @author Matthias Wachs | ||
23 | */ | ||
24 | #include "platform.h" | ||
25 | #include "gnunet_util_lib.h" | ||
26 | #include "gnunet_nt_lib.h" | ||
27 | |||
28 | /** | ||
29 | * How frequently do we scan the interfaces for changes to the addresses? | ||
30 | */ | ||
31 | #define INTERFACE_PROCESSING_INTERVAL GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 2) | ||
32 | |||
33 | |||
34 | /** | ||
35 | * Convert a `enum GNUNET_NetworkType` to a string | ||
36 | * | ||
37 | * @param net the network type | ||
38 | * @return a string or NULL if invalid | ||
39 | */ | ||
40 | const char * | ||
41 | GNUNET_NT_to_string (enum GNUNET_NetworkType net) | ||
42 | { | ||
43 | switch (net) | ||
44 | { | ||
45 | case GNUNET_NT_UNSPECIFIED: | ||
46 | return "UNSPECIFIED"; | ||
47 | case GNUNET_NT_LOOPBACK: | ||
48 | return "LOOPBACK"; | ||
49 | case GNUNET_NT_LAN: | ||
50 | return "LAN"; | ||
51 | case GNUNET_NT_WAN: | ||
52 | return "WAN"; | ||
53 | case GNUNET_NT_WLAN: | ||
54 | return "WLAN"; | ||
55 | case GNUNET_NT_BT: | ||
56 | return "BLUETOOTH"; | ||
57 | default: | ||
58 | return NULL; | ||
59 | } | ||
60 | } | ||
61 | |||
62 | |||
63 | /** | ||
64 | * We keep a list of our local networks so we can answer | ||
65 | * LAN vs. WAN questions. Note: WLAN is not detected yet. | ||
66 | * (maybe we can do that heuristically based on interface | ||
67 | * name in the future?). | ||
68 | */ | ||
69 | struct NT_Network | ||
70 | { | ||
71 | /** | ||
72 | * Kept in a DLL. | ||
73 | */ | ||
74 | struct NT_Network *next; | ||
75 | |||
76 | /** | ||
77 | * Kept in a DLL. | ||
78 | */ | ||
79 | struct NT_Network *prev; | ||
80 | |||
81 | /** | ||
82 | * Network address. | ||
83 | */ | ||
84 | struct sockaddr *network; | ||
85 | |||
86 | /** | ||
87 | * Netmask to determine what is in the LAN. | ||
88 | */ | ||
89 | struct sockaddr *netmask; | ||
90 | |||
91 | /** | ||
92 | * How long are @e network and @e netmask? | ||
93 | */ | ||
94 | socklen_t length; | ||
95 | }; | ||
96 | |||
97 | |||
98 | /** | ||
99 | * Handle to the interface scanner. | ||
100 | */ | ||
101 | struct GNUNET_NT_InterfaceScanner | ||
102 | { | ||
103 | |||
104 | /** | ||
105 | * Head of LAN networks list. | ||
106 | */ | ||
107 | struct NT_Network *net_head; | ||
108 | |||
109 | /** | ||
110 | * Tail of LAN networks list. | ||
111 | */ | ||
112 | struct NT_Network *net_tail; | ||
113 | |||
114 | /** | ||
115 | * Task for periodically refreshing our LAN network list. | ||
116 | */ | ||
117 | struct GNUNET_SCHEDULER_Task *interface_task; | ||
118 | |||
119 | }; | ||
120 | |||
121 | |||
122 | /** | ||
123 | * Delete all entries from the current network list. | ||
124 | * | ||
125 | * @param is scanner to clean up | ||
126 | */ | ||
127 | static void | ||
128 | delete_networks (struct GNUNET_NT_InterfaceScanner *is) | ||
129 | { | ||
130 | struct NT_Network *cur; | ||
131 | |||
132 | while (NULL != (cur = is->net_head)) | ||
133 | { | ||
134 | GNUNET_CONTAINER_DLL_remove (is->net_head, | ||
135 | is->net_tail, | ||
136 | cur); | ||
137 | GNUNET_free (cur); | ||
138 | } | ||
139 | } | ||
140 | |||
141 | |||
142 | /** | ||
143 | * Function invoked for each interface found. Adds the interface's | ||
144 | * network addresses to the respective DLL, so we can distinguish | ||
145 | * between LAN and WAN. | ||
146 | * | ||
147 | * @param cls closure with the `struct GNUNET_NT_InterfaceScanner` | ||
148 | * @param name name of the interface (can be NULL for unknown) | ||
149 | * @param isDefault is this presumably the default interface | ||
150 | * @param addr address of this interface (can be NULL for unknown or unassigned) | ||
151 | * @param broadcast_addr the broadcast address (can be NULL for unknown or unassigned) | ||
152 | * @param netmask the network mask (can be NULL for unknown or unassigned) | ||
153 | * @param addrlen length of the address | ||
154 | * @return #GNUNET_OK to continue iteration | ||
155 | */ | ||
156 | static int | ||
157 | interface_proc (void *cls, | ||
158 | const char *name, | ||
159 | int isDefault, | ||
160 | const struct sockaddr *addr, | ||
161 | const struct sockaddr *broadcast_addr, | ||
162 | const struct sockaddr *netmask, | ||
163 | socklen_t addrlen) | ||
164 | { | ||
165 | struct GNUNET_NT_InterfaceScanner *is = cls; | ||
166 | /* Calculate network */ | ||
167 | struct NT_Network *net = NULL; | ||
168 | |||
169 | /* Skipping IPv4 loopback addresses since we have special check */ | ||
170 | if (addr->sa_family == AF_INET) | ||
171 | { | ||
172 | const struct sockaddr_in *a4 = (const struct sockaddr_in *) addr; | ||
173 | |||
174 | if ((a4->sin_addr.s_addr & htonl(0xff000000)) == htonl (0x7f000000)) | ||
175 | return GNUNET_OK; | ||
176 | } | ||
177 | /* Skipping IPv6 loopback addresses since we have special check */ | ||
178 | if (addr->sa_family == AF_INET6) | ||
179 | { | ||
180 | const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *) addr; | ||
181 | if (IN6_IS_ADDR_LOOPBACK (&a6->sin6_addr)) | ||
182 | return GNUNET_OK; | ||
183 | } | ||
184 | |||
185 | if (addr->sa_family == AF_INET) | ||
186 | { | ||
187 | const struct sockaddr_in *addr4 = (const struct sockaddr_in *) addr; | ||
188 | const struct sockaddr_in *netmask4 = (const struct sockaddr_in *) netmask; | ||
189 | struct sockaddr_in *tmp; | ||
190 | struct sockaddr_in network4; | ||
191 | |||
192 | net = GNUNET_malloc (sizeof (struct NT_Network) + 2 * sizeof (struct sockaddr_in)); | ||
193 | tmp = (struct sockaddr_in *) &net[1]; | ||
194 | net->network = (struct sockaddr *) &tmp[0]; | ||
195 | net->netmask = (struct sockaddr *) &tmp[1]; | ||
196 | net->length = addrlen; | ||
197 | |||
198 | memset (&network4, 0, sizeof (network4)); | ||
199 | network4.sin_family = AF_INET; | ||
200 | #if HAVE_SOCKADDR_IN_SIN_LEN | ||
201 | network4.sin_len = sizeof (network4); | ||
202 | #endif | ||
203 | network4.sin_addr.s_addr = (addr4->sin_addr.s_addr & netmask4->sin_addr.s_addr); | ||
204 | |||
205 | GNUNET_memcpy (net->netmask, netmask4, sizeof (struct sockaddr_in)); | ||
206 | GNUNET_memcpy (net->network, &network4, sizeof (struct sockaddr_in)); | ||
207 | } | ||
208 | |||
209 | if (addr->sa_family == AF_INET6) | ||
210 | { | ||
211 | const struct sockaddr_in6 *addr6 = (const struct sockaddr_in6 *) addr; | ||
212 | const struct sockaddr_in6 *netmask6 = (const struct sockaddr_in6 *) netmask; | ||
213 | struct sockaddr_in6 * tmp; | ||
214 | struct sockaddr_in6 network6; | ||
215 | |||
216 | net = GNUNET_malloc (sizeof (struct NT_Network) + 2 * sizeof (struct sockaddr_in6)); | ||
217 | tmp = (struct sockaddr_in6 *) &net[1]; | ||
218 | net->network = (struct sockaddr *) &tmp[0]; | ||
219 | net->netmask = (struct sockaddr *) &tmp[1]; | ||
220 | net->length = addrlen; | ||
221 | |||
222 | memset (&network6, 0, sizeof (network6)); | ||
223 | network6.sin6_family = AF_INET6; | ||
224 | #if HAVE_SOCKADDR_IN_SIN_LEN | ||
225 | network6.sin6_len = sizeof (network6); | ||
226 | #endif | ||
227 | unsigned int c = 0; | ||
228 | uint32_t *addr_elem = (uint32_t *) &addr6->sin6_addr; | ||
229 | uint32_t *mask_elem = (uint32_t *) &netmask6->sin6_addr; | ||
230 | uint32_t *net_elem = (uint32_t *) &network6.sin6_addr; | ||
231 | for (c = 0; c < 4; c++) | ||
232 | net_elem[c] = addr_elem[c] & mask_elem[c]; | ||
233 | |||
234 | GNUNET_memcpy (net->netmask, netmask6, sizeof (struct sockaddr_in6)); | ||
235 | GNUNET_memcpy (net->network, &network6, sizeof (struct sockaddr_in6)); | ||
236 | } | ||
237 | if (NULL == net) | ||
238 | return GNUNET_OK; /* odd / unsupported address family */ | ||
239 | |||
240 | /* Store in list */ | ||
241 | #if VERBOSE_NT | ||
242 | char * netmask = GNUNET_strdup (GNUNET_a2s((struct sockaddr *) net->netmask, addrlen)); | ||
243 | GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, | ||
244 | "nt", | ||
245 | "Adding network `%s', netmask `%s'\n", | ||
246 | GNUNET_a2s ((struct sockaddr *) net->network, | ||
247 | addrlen), | ||
248 | netmask); | ||
249 | GNUNET_free (netmask); | ||
250 | #endif | ||
251 | GNUNET_CONTAINER_DLL_insert (is->net_head, | ||
252 | is->net_tail, | ||
253 | net); | ||
254 | |||
255 | return GNUNET_OK; | ||
256 | } | ||
257 | |||
258 | |||
259 | /** | ||
260 | * Periodically get list of network addresses from our interfaces. | ||
261 | * | ||
262 | * @param cls closure | ||
263 | */ | ||
264 | static void | ||
265 | get_addresses (void *cls) | ||
266 | { | ||
267 | struct GNUNET_NT_InterfaceScanner *is = cls; | ||
268 | |||
269 | is->interface_task = NULL; | ||
270 | delete_networks (is); | ||
271 | GNUNET_OS_network_interfaces_list (&interface_proc, | ||
272 | is); | ||
273 | is->interface_task = GNUNET_SCHEDULER_add_delayed (INTERFACE_PROCESSING_INTERVAL, | ||
274 | &get_addresses, | ||
275 | is); | ||
276 | } | ||
277 | |||
278 | |||
279 | /** | ||
280 | * Returns where the address is located: LAN or WAN or ... | ||
281 | * | ||
282 | * @param is the interface scanner handle | ||
283 | * @param addr address | ||
284 | * @param addrlen address length | ||
285 | * @return type of the network the address belongs to | ||
286 | */ | ||
287 | enum GNUNET_NetworkType | ||
288 | GNUNET_NT_scanner_address_get_type (struct GNUNET_NT_InterfaceScanner *is, | ||
289 | const struct sockaddr *addr, | ||
290 | socklen_t addrlen) | ||
291 | { | ||
292 | struct NT_Network *cur = is->net_head; | ||
293 | enum GNUNET_NetworkType type = GNUNET_NT_UNSPECIFIED; | ||
294 | |||
295 | switch (addr->sa_family) | ||
296 | { | ||
297 | case AF_UNIX: | ||
298 | type = GNUNET_NT_LOOPBACK; | ||
299 | break; | ||
300 | case AF_INET: | ||
301 | { | ||
302 | const struct sockaddr_in *a4 = (const struct sockaddr_in *) addr; | ||
303 | |||
304 | if ((a4->sin_addr.s_addr & htonl(0xff000000)) == htonl (0x7f000000)) | ||
305 | type = GNUNET_NT_LOOPBACK; | ||
306 | break; | ||
307 | } | ||
308 | case AF_INET6: | ||
309 | { | ||
310 | const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *) addr; | ||
311 | |||
312 | if (IN6_IS_ADDR_LOOPBACK (&a6->sin6_addr)) | ||
313 | type = GNUNET_NT_LOOPBACK; | ||
314 | break; | ||
315 | } | ||
316 | default: | ||
317 | GNUNET_break (0); | ||
318 | break; | ||
319 | } | ||
320 | |||
321 | /* Check local networks */ | ||
322 | while ((NULL != cur) && (GNUNET_NT_UNSPECIFIED == type)) | ||
323 | { | ||
324 | if (addrlen != cur->length) | ||
325 | { | ||
326 | cur = cur->next; | ||
327 | continue; | ||
328 | } | ||
329 | if (addr->sa_family == AF_INET) | ||
330 | { | ||
331 | const struct sockaddr_in *a4 = (const struct sockaddr_in *) addr; | ||
332 | const struct sockaddr_in *net4 = (const struct sockaddr_in *) cur->network; | ||
333 | const struct sockaddr_in *mask4 = (const struct sockaddr_in *) cur->netmask; | ||
334 | |||
335 | if (((a4->sin_addr.s_addr & mask4->sin_addr.s_addr)) == net4->sin_addr.s_addr) | ||
336 | type = GNUNET_NT_LAN; | ||
337 | } | ||
338 | if (addr->sa_family == AF_INET6) | ||
339 | { | ||
340 | const struct sockaddr_in6 *a6 = (const struct sockaddr_in6 *) addr; | ||
341 | const struct sockaddr_in6 *net6 = (const struct sockaddr_in6 *) cur->network; | ||
342 | const struct sockaddr_in6 *mask6 = (const struct sockaddr_in6 *) cur->netmask; | ||
343 | |||
344 | int res = GNUNET_YES; | ||
345 | int c = 0; | ||
346 | uint32_t *addr_elem = (uint32_t *) &a6->sin6_addr; | ||
347 | uint32_t *mask_elem = (uint32_t *) &mask6->sin6_addr; | ||
348 | uint32_t *net_elem = (uint32_t *) &net6->sin6_addr; | ||
349 | for (c = 0; c < 4; c++) | ||
350 | if ((addr_elem[c] & mask_elem[c]) != net_elem[c]) | ||
351 | res = GNUNET_NO; | ||
352 | |||
353 | if (res == GNUNET_YES) | ||
354 | type = GNUNET_NT_LAN; | ||
355 | } | ||
356 | cur = cur->next; | ||
357 | } | ||
358 | |||
359 | /* no local network found for this address, default: WAN */ | ||
360 | if (type == GNUNET_NT_UNSPECIFIED) | ||
361 | type = GNUNET_NT_WAN; | ||
362 | GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, | ||
363 | "nt-scanner-api", | ||
364 | "`%s' is in network `%s'\n", | ||
365 | GNUNET_a2s (addr, | ||
366 | addrlen), | ||
367 | GNUNET_NT_to_string (type)); | ||
368 | return type; | ||
369 | } | ||
370 | |||
371 | |||
372 | /** | ||
373 | * Initialize the interface scanner. | ||
374 | * | ||
375 | * @return interface scanner | ||
376 | */ | ||
377 | struct GNUNET_NT_InterfaceScanner * | ||
378 | GNUNET_NT_scanner_init () | ||
379 | { | ||
380 | struct GNUNET_NT_InterfaceScanner *is; | ||
381 | |||
382 | is = GNUNET_new (struct GNUNET_NT_InterfaceScanner); | ||
383 | GNUNET_OS_network_interfaces_list (&interface_proc, | ||
384 | is); | ||
385 | is->interface_task = GNUNET_SCHEDULER_add_delayed (INTERFACE_PROCESSING_INTERVAL, | ||
386 | &get_addresses, | ||
387 | is); | ||
388 | return is; | ||
389 | } | ||
390 | |||
391 | |||
392 | /** | ||
393 | * Client is done with the interface scanner, release resources. | ||
394 | * | ||
395 | * @param is handle to release | ||
396 | */ | ||
397 | void | ||
398 | GNUNET_NT_scanner_done (struct GNUNET_NT_InterfaceScanner *is) | ||
399 | { | ||
400 | if (NULL != is->interface_task) | ||
401 | { | ||
402 | GNUNET_SCHEDULER_cancel (is->interface_task); | ||
403 | is->interface_task = NULL; | ||
404 | } | ||
405 | delete_networks (is); | ||
406 | GNUNET_free (is); | ||
407 | } | ||
408 | |||
409 | |||
410 | /* end of nt.c */ | ||