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51ea0904 | 1 | /* |
bf95c10a | 2 | * Copyright (C) 1996-2022 The Squid Software Foundation and contributors |
51ea0904 | 3 | * |
bbc27441 AJ |
4 | * Squid software is distributed under GPLv2+ license and includes |
5 | * contributions from numerous individuals and organizations. | |
6 | * Please see the COPYING and CONTRIBUTORS files for details. | |
51ea0904 CT |
7 | */ |
8 | ||
bbc27441 AJ |
9 | /* DEBUG: section 49 SNMP Interface */ |
10 | ||
f7f3304a | 11 | #include "squid.h" |
51ea0904 | 12 | #include "base/TextException.h" |
3b5c25e8 | 13 | #include "Debug.h" |
51ea0904 | 14 | #include "ipc/TypedMsgHdr.h" |
d6e3ad20 | 15 | #include "snmp/Var.h" |
5bed43d6 | 16 | #include "tools.h" |
074d6a40 | 17 | |
b167f1b8 | 18 | #include <algorithm> |
51ea0904 | 19 | |
51ea0904 CT |
20 | Snmp::Var::Var() |
21 | { | |
22 | init(); | |
23 | } | |
24 | ||
25 | Snmp::Var::Var(const Var& var) | |
26 | { | |
27 | init(); | |
28 | assign(var); | |
29 | } | |
30 | ||
31 | Snmp::Var::~Var() | |
32 | { | |
33 | clear(); | |
34 | } | |
35 | ||
36 | Snmp::Var& | |
37 | Snmp::Var::operator = (const Var& var) | |
38 | { | |
39 | clear(); | |
40 | assign(var); | |
41 | return *this; | |
42 | } | |
43 | ||
44 | void | |
45 | Snmp::Var::init() | |
46 | { | |
b56b37cf | 47 | memset(static_cast<variable_list *>(this), 0, sizeof(variable_list)); |
51ea0904 CT |
48 | } |
49 | ||
50 | Snmp::Var& | |
51 | Snmp::Var::operator += (const Var& var) | |
52 | { | |
8fb5a96c | 53 | switch (type) { |
51ea0904 CT |
54 | case SMI_INTEGER: |
55 | setInt(asInt() + var.asInt()); | |
56 | break; | |
57 | case SMI_GAUGE32: | |
58 | setGauge(asGauge() + var.asGauge()); | |
59 | break; | |
60 | case SMI_COUNTER32: | |
61 | setCounter(asCounter() + var.asCounter()); | |
62 | break; | |
63 | case SMI_COUNTER64: | |
64 | setCounter64(asCounter64() + var.asCounter64()); | |
65 | break; | |
66 | case SMI_TIMETICKS: | |
67 | setTimeTicks(asTimeTicks() + var.asTimeTicks()); | |
68 | break; | |
69 | default: | |
d816f28d | 70 | debugs(49, DBG_CRITICAL, "ERROR: Unsupported type: " << type); |
51ea0904 CT |
71 | throw TexcHere("Unsupported type"); |
72 | break; | |
73 | } | |
74 | return *this; | |
75 | } | |
76 | ||
77 | Snmp::Var& | |
78 | Snmp::Var::operator /= (int num) | |
79 | { | |
80 | Must(num != 0); | |
8fb5a96c | 81 | switch (type) { |
51ea0904 CT |
82 | case SMI_INTEGER: |
83 | setInt(asInt() / num); | |
84 | break; | |
85 | case SMI_GAUGE32: | |
86 | setGauge(asGauge() / num); | |
87 | break; | |
88 | case SMI_COUNTER32: | |
89 | setCounter(asCounter() / num); | |
90 | break; | |
91 | case SMI_COUNTER64: | |
92 | setCounter64(asCounter64() / num); | |
93 | break; | |
94 | case SMI_TIMETICKS: | |
95 | setTimeTicks(asTimeTicks() / num); | |
96 | break; | |
97 | default: | |
d816f28d | 98 | debugs(49, DBG_CRITICAL, "ERROR: Unsupported type: " << type); |
51ea0904 CT |
99 | throw TexcHere("Unsupported type"); |
100 | break; | |
101 | } | |
102 | return *this; | |
103 | } | |
104 | ||
105 | bool | |
106 | Snmp::Var::operator < (const Var& var) const | |
107 | { | |
8fb5a96c | 108 | switch (type) { |
51ea0904 CT |
109 | case SMI_INTEGER: |
110 | return asInt() < var.asInt(); | |
111 | case SMI_GAUGE32: | |
112 | return asGauge() < var.asGauge(); | |
113 | case SMI_COUNTER32: | |
114 | return asCounter() < var.asCounter(); | |
115 | case SMI_COUNTER64: | |
116 | return asCounter64() < var.asCounter64(); | |
117 | case SMI_TIMETICKS: | |
118 | return asTimeTicks() < var.asTimeTicks(); | |
119 | default: | |
d816f28d | 120 | debugs(49, DBG_CRITICAL, "ERROR: Unsupported type: " << type); |
51ea0904 CT |
121 | throw TexcHere("Unsupported type"); |
122 | break; | |
123 | } | |
124 | return false; // unreachable | |
125 | } | |
126 | ||
127 | bool | |
128 | Snmp::Var::operator > (const Var& var) const | |
129 | { | |
8fb5a96c | 130 | switch (type) { |
51ea0904 CT |
131 | case SMI_INTEGER: |
132 | return asInt() > var.asInt(); | |
133 | case SMI_GAUGE32: | |
134 | return asGauge() > var.asGauge(); | |
135 | case SMI_COUNTER32: | |
136 | return asCounter() > var.asCounter(); | |
137 | case SMI_COUNTER64: | |
138 | return asCounter64() > var.asCounter64(); | |
139 | case SMI_TIMETICKS: | |
140 | return asTimeTicks() > var.asTimeTicks(); | |
141 | default: | |
d816f28d | 142 | debugs(49, DBG_CRITICAL, "ERROR: Unsupported type: " << type); |
51ea0904 CT |
143 | throw TexcHere("Unsupported type"); |
144 | break; | |
145 | } | |
146 | return false; // unreachable | |
147 | } | |
148 | ||
149 | void | |
150 | Snmp::Var::assign(const Var& var) | |
151 | { | |
152 | setName(var.getName()); | |
153 | copyValue(var); | |
154 | } | |
155 | ||
156 | void | |
157 | Snmp::Var::clearName() | |
158 | { | |
b56b37cf AJ |
159 | xfree(name); |
160 | name = nullptr; | |
51ea0904 CT |
161 | name_length = 0; |
162 | } | |
163 | ||
164 | Range<const oid*> | |
165 | Snmp::Var::getName() const | |
166 | { | |
167 | return Range<const oid*>(name, name + name_length); | |
168 | } | |
169 | ||
170 | void | |
171 | Snmp::Var::setName(const Range<const oid*>& aName) | |
172 | { | |
173 | clearName(); | |
174 | if (aName.start != NULL && aName.size() != 0) { | |
175 | name_length = aName.size(); | |
176 | name = static_cast<oid*>(xmalloc(name_length * sizeof(oid))); | |
177 | std::copy(aName.start, aName.end, name); | |
178 | } | |
179 | } | |
180 | ||
181 | void | |
182 | Snmp::Var::clearValue() | |
183 | { | |
b56b37cf AJ |
184 | xfree(val.string); |
185 | val.string = nullptr; | |
51ea0904 CT |
186 | val_len = 0; |
187 | type = 0; | |
188 | } | |
189 | ||
190 | bool | |
191 | Snmp::Var::isNull() const | |
192 | { | |
193 | return type == SMI_NULLOBJ; | |
194 | } | |
195 | ||
196 | int | |
197 | Snmp::Var::asInt() const | |
198 | { | |
199 | Must(type == SMI_INTEGER); | |
200 | Must(val.integer != NULL && val_len == sizeof(int)); | |
201 | return *val.integer; | |
202 | } | |
203 | ||
204 | unsigned int | |
205 | Snmp::Var::asGauge() const | |
206 | { | |
207 | Must(type == SMI_GAUGE32); | |
208 | Must(val.integer != NULL && val_len == 4); | |
209 | return *reinterpret_cast<unsigned int*>(val.integer); | |
210 | } | |
211 | ||
212 | int | |
213 | Snmp::Var::asCounter() const | |
214 | { | |
215 | Must(type == SMI_COUNTER32); | |
216 | Must(val.integer != NULL && val_len == 4); | |
217 | return *reinterpret_cast<int*>(val.integer); | |
218 | } | |
219 | ||
220 | long long int | |
221 | Snmp::Var::asCounter64() const | |
222 | { | |
223 | Must(type == SMI_COUNTER64); | |
224 | Must(val.integer != NULL && val_len == 8); | |
225 | return *reinterpret_cast<long long int*>(val.integer); | |
226 | } | |
227 | ||
579928b6 | 228 | unsigned int |
51ea0904 CT |
229 | Snmp::Var::asTimeTicks() const |
230 | { | |
231 | Must(type == SMI_TIMETICKS); | |
579928b6 CT |
232 | Must(val.integer != NULL && val_len == sizeof(unsigned int)); |
233 | return *reinterpret_cast<unsigned int*>(val.integer); | |
51ea0904 CT |
234 | } |
235 | ||
236 | Range<const oid*> | |
237 | Snmp::Var::asObject() const | |
238 | { | |
239 | Must(type == SMI_OBJID); | |
240 | Must(val_len % sizeof(oid) == 0); | |
241 | int length = val_len / sizeof(oid); | |
242 | Must(val.objid != NULL && length > 0); | |
243 | return Range<const oid*>(val.objid, val.objid + length); | |
244 | } | |
245 | ||
246 | Range<const u_char*> | |
247 | Snmp::Var::asString() const | |
248 | { | |
249 | Must(type == SMI_STRING); | |
250 | Must(val.string != NULL && val_len > 0); | |
251 | return Range<const u_char*>(val.string, val.string + val_len); | |
252 | } | |
253 | ||
51ea0904 CT |
254 | void |
255 | Snmp::Var::setInt(int value) | |
256 | { | |
257 | setValue(&value, sizeof(value), SMI_INTEGER); | |
258 | } | |
259 | ||
260 | void | |
261 | Snmp::Var::setCounter(int value) | |
262 | { | |
263 | setValue(&value, sizeof(value), SMI_COUNTER32); | |
264 | } | |
265 | ||
266 | void | |
267 | Snmp::Var::setGauge(unsigned int value) | |
268 | { | |
269 | setValue(&value, sizeof(value), SMI_GAUGE32); | |
270 | } | |
271 | ||
272 | void | |
273 | Snmp::Var::setString(const Range<const u_char*>& string) | |
274 | { | |
275 | setValue(string.start, string.size(), SMI_STRING); | |
276 | } | |
277 | ||
278 | void | |
279 | Snmp::Var::setObject(const Range<const oid*>& object) | |
280 | { | |
281 | setValue(object.start, object.size() * sizeof(oid), SMI_OBJID); | |
282 | } | |
283 | ||
284 | void | |
285 | Snmp::Var::setCounter64(long long int counter) | |
286 | { | |
287 | setValue(&counter, sizeof(counter), SMI_COUNTER64); | |
288 | } | |
289 | ||
290 | void | |
579928b6 | 291 | Snmp::Var::setTimeTicks(unsigned int ticks) |
51ea0904 CT |
292 | { |
293 | setValue(&ticks, sizeof(ticks), SMI_TIMETICKS); | |
294 | } | |
295 | ||
51ea0904 CT |
296 | void |
297 | Snmp::Var::copyValue(const Var& var) | |
298 | { | |
299 | setValue(var.val.string, var.val_len, var.type); | |
300 | } | |
301 | ||
302 | void | |
303 | Snmp::Var::setValue(const void* value, int length, int aType) | |
304 | { | |
305 | clearValue(); | |
306 | if (value != NULL) { | |
307 | Must(length > 0 && aType > 0); | |
308 | val.string = static_cast<u_char*>(xmalloc(length)); | |
309 | memcpy(val.string, value, length); | |
310 | } | |
311 | val_len = length; | |
312 | type = aType; | |
313 | } | |
314 | ||
315 | void | |
316 | Snmp::Var::clear() | |
317 | { | |
318 | clearName(); | |
319 | clearValue(); | |
320 | init(); | |
321 | } | |
322 | ||
323 | void | |
324 | Snmp::Var::pack(Ipc::TypedMsgHdr& msg) const | |
325 | { | |
326 | msg.putInt(name_length); | |
327 | if (name_length > 0) { | |
328 | Must(name != NULL); | |
329 | msg.putFixed(name, name_length * sizeof(oid)); | |
330 | } | |
331 | msg.putPod(type); | |
332 | msg.putPod(val_len); | |
333 | if (val_len > 0) { | |
334 | Must(val.string != NULL); | |
335 | msg.putFixed(val.string, val_len); | |
336 | } | |
337 | } | |
338 | ||
339 | void | |
340 | Snmp::Var::unpack(const Ipc::TypedMsgHdr& msg) | |
341 | { | |
342 | clearName(); | |
343 | clearValue(); | |
344 | name_length = msg.getInt(); | |
345 | Must(name_length >= 0); | |
346 | if (name_length > 0) { | |
347 | name = static_cast<oid*>(xmalloc(name_length * sizeof(oid))); | |
348 | msg.getFixed(name, name_length * sizeof(oid)); | |
349 | } | |
350 | msg.getPod(type); | |
351 | val_len = msg.getInt(); | |
352 | Must(val_len >= 0); | |
353 | if (val_len > 0) { | |
354 | val.string = static_cast<u_char*>(xmalloc(val_len)); | |
355 | msg.getFixed(val.string, val_len); | |
356 | } | |
357 | } | |
f53969cc | 358 |