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1 | /* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the |
2 | * Sun Industry Standards Source License 1.1, that is available at: | |
3 | * http://host-sflow.sourceforge.net/sissl.html | |
4 | * or the InMon sFlow License, that is available at: | |
5 | * http://www.inmon.com/technology/sflowlicense.txt | |
6 | */ | |
c72e245a | 7 | |
6506f45c BP |
8 | #ifndef __CHECKER__ /* Don't run sparse on anything in this file. */ |
9 | ||
c72e245a BP |
10 | #include <assert.h> |
11 | #include "sflow_api.h" | |
12 | ||
13 | static void resetSampleCollector(SFLReceiver *receiver); | |
14 | static void sendSample(SFLReceiver *receiver); | |
15 | static void sflError(SFLReceiver *receiver, char *errm); | |
16 | inline static void putNet32(SFLReceiver *receiver, u_int32_t val); | |
17 | inline static void putAddress(SFLReceiver *receiver, SFLAddress *addr); | |
18 | #ifdef SFLOW_DO_SOCKET | |
19 | static void initSocket(SFLReceiver *receiver); | |
20 | #endif | |
21 | ||
22 | /*_________________--------------------------__________________ | |
23 | _________________ sfl_receiver_init __________________ | |
24 | -----------------__________________________------------------ | |
25 | */ | |
26 | ||
27 | void sfl_receiver_init(SFLReceiver *receiver, SFLAgent *agent) | |
28 | { | |
29 | /* first clear everything */ | |
30 | memset(receiver, 0, sizeof(*receiver)); | |
31 | ||
32 | /* now copy in the parameters */ | |
33 | receiver->agent = agent; | |
34 | ||
35 | /* set defaults */ | |
36 | receiver->sFlowRcvrMaximumDatagramSize = SFL_DEFAULT_DATAGRAM_SIZE; | |
37 | receiver->sFlowRcvrPort = SFL_DEFAULT_COLLECTOR_PORT; | |
38 | ||
39 | #ifdef SFLOW_DO_SOCKET | |
40 | /* initialize the socket address */ | |
41 | initSocket(receiver); | |
42 | #endif | |
43 | ||
44 | /* preset some of the header fields */ | |
45 | receiver->sampleCollector.datap = receiver->sampleCollector.data; | |
46 | putNet32(receiver, SFLDATAGRAM_VERSION5); | |
47 | putAddress(receiver, &agent->myIP); | |
48 | putNet32(receiver, agent->subId); | |
49 | ||
50 | /* prepare to receive the first sample */ | |
51 | resetSampleCollector(receiver); | |
52 | } | |
53 | ||
54 | /*_________________---------------------------__________________ | |
55 | _________________ reset __________________ | |
56 | -----------------___________________________------------------ | |
57 | ||
58 | called on timeout, or when owner string is cleared | |
59 | */ | |
60 | ||
61 | static void reset(SFLReceiver *receiver) { | |
62 | // ask agent to tell samplers and pollers to stop sending samples | |
63 | sfl_agent_resetReceiver(receiver->agent, receiver); | |
64 | // reinitialize | |
65 | sfl_receiver_init(receiver, receiver->agent); | |
66 | } | |
67 | ||
68 | #ifdef SFLOW_DO_SOCKET | |
69 | /*_________________---------------------------__________________ | |
70 | _________________ initSocket __________________ | |
71 | -----------------___________________________------------------ | |
72 | */ | |
73 | ||
74 | static void initSocket(SFLReceiver *receiver) { | |
75 | if(receiver->sFlowRcvrAddress.type == SFLADDRESSTYPE_IP_V6) { | |
76 | struct sockaddr_in6 *sa6 = &receiver->receiver6; | |
77 | sa6->sin6_port = htons((u_int16_t)receiver->sFlowRcvrPort); | |
78 | sa6->sin6_family = AF_INET6; | |
79 | sa6->sin6_addr = receiver->sFlowRcvrAddress.address.ip_v6; | |
80 | } | |
81 | else { | |
82 | struct sockaddr_in *sa4 = &receiver->receiver4; | |
83 | sa4->sin_port = htons((u_int16_t)receiver->sFlowRcvrPort); | |
84 | sa4->sin_family = AF_INET; | |
85 | sa4->sin_addr = receiver->sFlowRcvrAddress.address.ip_v4; | |
86 | } | |
87 | } | |
88 | #endif | |
89 | ||
90 | /*_________________----------------------------------------_____________ | |
91 | _________________ MIB Vars _____________ | |
92 | -----------------________________________________________------------- | |
93 | */ | |
94 | ||
95 | char * sfl_receiver_get_sFlowRcvrOwner(SFLReceiver *receiver) { | |
96 | return receiver->sFlowRcvrOwner; | |
97 | } | |
98 | void sfl_receiver_set_sFlowRcvrOwner(SFLReceiver *receiver, char *sFlowRcvrOwner) { | |
99 | receiver->sFlowRcvrOwner = sFlowRcvrOwner; | |
100 | if(sFlowRcvrOwner == NULL || sFlowRcvrOwner[0] == '\0') { | |
101 | // reset condition! owner string was cleared | |
102 | reset(receiver); | |
103 | } | |
104 | } | |
105 | time_t sfl_receiver_get_sFlowRcvrTimeout(SFLReceiver *receiver) { | |
106 | return receiver->sFlowRcvrTimeout; | |
107 | } | |
108 | void sfl_receiver_set_sFlowRcvrTimeout(SFLReceiver *receiver, time_t sFlowRcvrTimeout) { | |
109 | receiver->sFlowRcvrTimeout =sFlowRcvrTimeout; | |
d295e8e9 | 110 | } |
c72e245a BP |
111 | u_int32_t sfl_receiver_get_sFlowRcvrMaximumDatagramSize(SFLReceiver *receiver) { |
112 | return receiver->sFlowRcvrMaximumDatagramSize; | |
113 | } | |
114 | void sfl_receiver_set_sFlowRcvrMaximumDatagramSize(SFLReceiver *receiver, u_int32_t sFlowRcvrMaximumDatagramSize) { | |
115 | u_int32_t mdz = sFlowRcvrMaximumDatagramSize; | |
116 | if(mdz < SFL_MIN_DATAGRAM_SIZE) mdz = SFL_MIN_DATAGRAM_SIZE; | |
117 | receiver->sFlowRcvrMaximumDatagramSize = mdz; | |
118 | } | |
119 | SFLAddress *sfl_receiver_get_sFlowRcvrAddress(SFLReceiver *receiver) { | |
120 | return &receiver->sFlowRcvrAddress; | |
121 | } | |
122 | void sfl_receiver_set_sFlowRcvrAddress(SFLReceiver *receiver, SFLAddress *sFlowRcvrAddress) { | |
123 | if(sFlowRcvrAddress) receiver->sFlowRcvrAddress = *sFlowRcvrAddress; // structure copy | |
124 | #ifdef SFLOW_DO_SOCKET | |
125 | initSocket(receiver); | |
126 | #endif | |
127 | } | |
128 | u_int32_t sfl_receiver_get_sFlowRcvrPort(SFLReceiver *receiver) { | |
129 | return receiver->sFlowRcvrPort; | |
130 | } | |
131 | void sfl_receiver_set_sFlowRcvrPort(SFLReceiver *receiver, u_int32_t sFlowRcvrPort) { | |
132 | receiver->sFlowRcvrPort = sFlowRcvrPort; | |
133 | // update the socket structure | |
134 | #ifdef SFLOW_DO_SOCKET | |
135 | initSocket(receiver); | |
136 | #endif | |
137 | } | |
138 | ||
139 | /*_________________---------------------------__________________ | |
140 | _________________ sfl_receiver_tick __________________ | |
141 | -----------------___________________________------------------ | |
142 | */ | |
143 | ||
144 | void sfl_receiver_tick(SFLReceiver *receiver, time_t now) | |
145 | { | |
146 | // if there are any samples to send, flush them now | |
147 | if(receiver->sampleCollector.numSamples > 0) sendSample(receiver); | |
148 | // check the timeout | |
149 | if(receiver->sFlowRcvrTimeout && (u_int32_t)receiver->sFlowRcvrTimeout != 0xFFFFFFFF) { | |
150 | // count down one tick and reset if we reach 0 | |
151 | if(--receiver->sFlowRcvrTimeout == 0) reset(receiver); | |
152 | } | |
153 | } | |
154 | ||
155 | /*_________________-----------------------------__________________ | |
156 | _________________ receiver write utilities __________________ | |
157 | -----------------_____________________________------------------ | |
158 | */ | |
d295e8e9 | 159 | |
c72e245a BP |
160 | inline static void put32(SFLReceiver *receiver, u_int32_t val) |
161 | { | |
162 | *receiver->sampleCollector.datap++ = val; | |
163 | } | |
164 | ||
165 | inline static void putNet32(SFLReceiver *receiver, u_int32_t val) | |
166 | { | |
167 | *receiver->sampleCollector.datap++ = htonl(val); | |
168 | } | |
169 | ||
170 | inline static void putNet32_run(SFLReceiver *receiver, void *obj, size_t quads) | |
171 | { | |
172 | u_int32_t *from = (u_int32_t *)obj; | |
173 | while(quads--) putNet32(receiver, *from++); | |
174 | } | |
175 | ||
176 | inline static void putNet64(SFLReceiver *receiver, u_int64_t val64) | |
177 | { | |
178 | u_int32_t *firstQuadPtr = receiver->sampleCollector.datap; | |
179 | // first copy the bytes in | |
180 | memcpy((u_char *)firstQuadPtr, &val64, 8); | |
181 | if(htonl(1) != 1) { | |
182 | // swap the bytes, and reverse the quads too | |
183 | u_int32_t tmp = *receiver->sampleCollector.datap++; | |
184 | *firstQuadPtr = htonl(*receiver->sampleCollector.datap); | |
185 | *receiver->sampleCollector.datap++ = htonl(tmp); | |
186 | } | |
187 | else receiver->sampleCollector.datap += 2; | |
188 | } | |
189 | ||
190 | inline static void put128(SFLReceiver *receiver, u_char *val) | |
191 | { | |
192 | memcpy(receiver->sampleCollector.datap, val, 16); | |
193 | receiver->sampleCollector.datap += 4; | |
194 | } | |
195 | ||
196 | inline static void putString(SFLReceiver *receiver, SFLString *s) | |
197 | { | |
198 | putNet32(receiver, s->len); | |
199 | memcpy(receiver->sampleCollector.datap, s->str, s->len); | |
200 | receiver->sampleCollector.datap += (s->len + 3) / 4; /* pad to 4-byte boundary */ | |
201 | } | |
202 | ||
203 | inline static u_int32_t stringEncodingLength(SFLString *s) { | |
204 | // answer in bytes, so remember to mulitply by 4 after rounding up to nearest 4-byte boundary | |
205 | return 4 + (((s->len + 3) / 4) * 4); | |
206 | } | |
207 | ||
208 | inline static void putAddress(SFLReceiver *receiver, SFLAddress *addr) | |
209 | { | |
210 | // encode unspecified addresses as IPV4:0.0.0.0 - or should we flag this as an error? | |
211 | if(addr->type == 0) { | |
212 | putNet32(receiver, SFLADDRESSTYPE_IP_V4); | |
213 | put32(receiver, 0); | |
214 | } | |
215 | else { | |
216 | putNet32(receiver, addr->type); | |
217 | if(addr->type == SFLADDRESSTYPE_IP_V4) put32(receiver, addr->address.ip_v4.addr); | |
218 | else put128(receiver, addr->address.ip_v6.addr); | |
219 | } | |
220 | } | |
221 | ||
222 | inline static u_int32_t addressEncodingLength(SFLAddress *addr) { | |
223 | return (addr->type == SFLADDRESSTYPE_IP_V6) ? 20 : 8; // type + address (unspecified == IPV4) | |
224 | } | |
225 | ||
226 | inline static void putMACAddress(SFLReceiver *receiver, u_int8_t *mac) | |
227 | { | |
228 | memcpy(receiver->sampleCollector.datap, mac, 6); | |
229 | receiver->sampleCollector.datap += 2; | |
230 | } | |
231 | ||
232 | inline static void putSwitch(SFLReceiver *receiver, SFLExtended_switch *sw) | |
233 | { | |
234 | putNet32(receiver, sw->src_vlan); | |
235 | putNet32(receiver, sw->src_priority); | |
236 | putNet32(receiver, sw->dst_vlan); | |
237 | putNet32(receiver, sw->dst_priority); | |
238 | } | |
239 | ||
240 | inline static void putRouter(SFLReceiver *receiver, SFLExtended_router *router) | |
241 | { | |
242 | putAddress(receiver, &router->nexthop); | |
243 | putNet32(receiver, router->src_mask); | |
244 | putNet32(receiver, router->dst_mask); | |
245 | } | |
246 | ||
247 | inline static u_int32_t routerEncodingLength(SFLExtended_router *router) { | |
248 | return addressEncodingLength(&router->nexthop) + 8; | |
249 | } | |
250 | ||
251 | inline static void putGateway(SFLReceiver *receiver, SFLExtended_gateway *gw) | |
252 | { | |
253 | putAddress(receiver, &gw->nexthop); | |
254 | putNet32(receiver, gw->as); | |
255 | putNet32(receiver, gw->src_as); | |
256 | putNet32(receiver, gw->src_peer_as); | |
257 | putNet32(receiver, gw->dst_as_path_segments); | |
258 | { | |
259 | u_int32_t seg = 0; | |
260 | for(; seg < gw->dst_as_path_segments; seg++) { | |
261 | putNet32(receiver, gw->dst_as_path[seg].type); | |
262 | putNet32(receiver, gw->dst_as_path[seg].length); | |
263 | putNet32_run(receiver, gw->dst_as_path[seg].as.seq, gw->dst_as_path[seg].length); | |
264 | } | |
265 | } | |
266 | putNet32(receiver, gw->communities_length); | |
267 | putNet32_run(receiver, gw->communities, gw->communities_length); | |
268 | putNet32(receiver, gw->localpref); | |
269 | } | |
270 | ||
271 | inline static u_int32_t gatewayEncodingLength(SFLExtended_gateway *gw) { | |
272 | u_int32_t elemSiz = addressEncodingLength(&gw->nexthop); | |
273 | u_int32_t seg = 0; | |
d295e8e9 | 274 | elemSiz += 16; // as, src_as, src_peer_as, dst_as_path_segments |
c72e245a | 275 | for(; seg < gw->dst_as_path_segments; seg++) { |
d295e8e9 | 276 | elemSiz += 8; // type, length |
c72e245a BP |
277 | elemSiz += 4 * gw->dst_as_path[seg].length; // set/seq bytes |
278 | } | |
279 | elemSiz += 4; // communities_length | |
280 | elemSiz += 4 * gw->communities_length; // communities | |
281 | elemSiz += 4; // localpref | |
282 | return elemSiz; | |
283 | } | |
284 | ||
285 | inline static void putUser(SFLReceiver *receiver, SFLExtended_user *user) | |
286 | { | |
287 | putNet32(receiver, user->src_charset); | |
288 | putString(receiver, &user->src_user); | |
289 | putNet32(receiver, user->dst_charset); | |
290 | putString(receiver, &user->dst_user); | |
291 | } | |
292 | ||
293 | inline static u_int32_t userEncodingLength(SFLExtended_user *user) { | |
294 | return 4 | |
295 | + stringEncodingLength(&user->src_user) | |
296 | + 4 | |
297 | + stringEncodingLength(&user->dst_user); | |
298 | } | |
299 | ||
300 | inline static void putUrl(SFLReceiver *receiver, SFLExtended_url *url) | |
301 | { | |
302 | putNet32(receiver, url->direction); | |
303 | putString(receiver, &url->url); | |
304 | putString(receiver, &url->host); | |
305 | } | |
306 | ||
307 | inline static u_int32_t urlEncodingLength(SFLExtended_url *url) { | |
308 | return 4 | |
309 | + stringEncodingLength(&url->url) | |
310 | + stringEncodingLength(&url->host); | |
311 | } | |
312 | ||
313 | inline static void putLabelStack(SFLReceiver *receiver, SFLLabelStack *labelStack) | |
314 | { | |
315 | putNet32(receiver, labelStack->depth); | |
316 | putNet32_run(receiver, labelStack->stack, labelStack->depth); | |
317 | } | |
318 | ||
319 | inline static u_int32_t labelStackEncodingLength(SFLLabelStack *labelStack) { | |
320 | return 4 + (4 * labelStack->depth); | |
321 | } | |
322 | ||
323 | inline static void putMpls(SFLReceiver *receiver, SFLExtended_mpls *mpls) | |
324 | { | |
325 | putAddress(receiver, &mpls->nextHop); | |
326 | putLabelStack(receiver, &mpls->in_stack); | |
327 | putLabelStack(receiver, &mpls->out_stack); | |
328 | } | |
329 | ||
330 | inline static u_int32_t mplsEncodingLength(SFLExtended_mpls *mpls) { | |
331 | return addressEncodingLength(&mpls->nextHop) | |
332 | + labelStackEncodingLength(&mpls->in_stack) | |
333 | + labelStackEncodingLength(&mpls->out_stack); | |
334 | } | |
335 | ||
336 | inline static void putNat(SFLReceiver *receiver, SFLExtended_nat *nat) | |
337 | { | |
338 | putAddress(receiver, &nat->src); | |
339 | putAddress(receiver, &nat->dst); | |
340 | } | |
341 | ||
342 | inline static u_int32_t natEncodingLength(SFLExtended_nat *nat) { | |
343 | return addressEncodingLength(&nat->src) | |
344 | + addressEncodingLength(&nat->dst); | |
345 | } | |
346 | ||
347 | inline static void putMplsTunnel(SFLReceiver *receiver, SFLExtended_mpls_tunnel *tunnel) | |
348 | { | |
349 | putString(receiver, &tunnel->tunnel_lsp_name); | |
350 | putNet32(receiver, tunnel->tunnel_id); | |
351 | putNet32(receiver, tunnel->tunnel_cos); | |
352 | } | |
353 | ||
354 | inline static u_int32_t mplsTunnelEncodingLength(SFLExtended_mpls_tunnel *tunnel) { | |
355 | return stringEncodingLength(&tunnel->tunnel_lsp_name) + 8; | |
356 | } | |
357 | ||
358 | inline static void putMplsVc(SFLReceiver *receiver, SFLExtended_mpls_vc *vc) | |
359 | { | |
360 | putString(receiver, &vc->vc_instance_name); | |
361 | putNet32(receiver, vc->vll_vc_id); | |
362 | putNet32(receiver, vc->vc_label_cos); | |
363 | } | |
364 | ||
365 | inline static u_int32_t mplsVcEncodingLength(SFLExtended_mpls_vc *vc) { | |
366 | return stringEncodingLength( &vc->vc_instance_name) + 8; | |
367 | } | |
368 | ||
369 | inline static void putMplsFtn(SFLReceiver *receiver, SFLExtended_mpls_FTN *ftn) | |
370 | { | |
371 | putString(receiver, &ftn->mplsFTNDescr); | |
372 | putNet32(receiver, ftn->mplsFTNMask); | |
373 | } | |
374 | ||
375 | inline static u_int32_t mplsFtnEncodingLength(SFLExtended_mpls_FTN *ftn) { | |
376 | return stringEncodingLength( &ftn->mplsFTNDescr) + 4; | |
377 | } | |
378 | ||
379 | inline static void putMplsLdpFec(SFLReceiver *receiver, SFLExtended_mpls_LDP_FEC *ldpfec) | |
380 | { | |
381 | putNet32(receiver, ldpfec->mplsFecAddrPrefixLength); | |
382 | } | |
383 | ||
384 | inline static u_int32_t mplsLdpFecEncodingLength(SFLExtended_mpls_LDP_FEC *ldpfec) { | |
385 | return 4; | |
386 | } | |
387 | ||
388 | inline static void putVlanTunnel(SFLReceiver *receiver, SFLExtended_vlan_tunnel *vlanTunnel) | |
389 | { | |
390 | putLabelStack(receiver, &vlanTunnel->stack); | |
391 | } | |
392 | ||
393 | inline static u_int32_t vlanTunnelEncodingLength(SFLExtended_vlan_tunnel *vlanTunnel) { | |
394 | return labelStackEncodingLength(&vlanTunnel->stack); | |
395 | } | |
396 | ||
397 | ||
398 | inline static void putGenericCounters(SFLReceiver *receiver, SFLIf_counters *counters) | |
399 | { | |
400 | putNet32(receiver, counters->ifIndex); | |
401 | putNet32(receiver, counters->ifType); | |
402 | putNet64(receiver, counters->ifSpeed); | |
403 | putNet32(receiver, counters->ifDirection); | |
404 | putNet32(receiver, counters->ifStatus); | |
405 | putNet64(receiver, counters->ifInOctets); | |
406 | putNet32(receiver, counters->ifInUcastPkts); | |
407 | putNet32(receiver, counters->ifInMulticastPkts); | |
408 | putNet32(receiver, counters->ifInBroadcastPkts); | |
409 | putNet32(receiver, counters->ifInDiscards); | |
410 | putNet32(receiver, counters->ifInErrors); | |
411 | putNet32(receiver, counters->ifInUnknownProtos); | |
412 | putNet64(receiver, counters->ifOutOctets); | |
413 | putNet32(receiver, counters->ifOutUcastPkts); | |
414 | putNet32(receiver, counters->ifOutMulticastPkts); | |
415 | putNet32(receiver, counters->ifOutBroadcastPkts); | |
416 | putNet32(receiver, counters->ifOutDiscards); | |
417 | putNet32(receiver, counters->ifOutErrors); | |
418 | putNet32(receiver, counters->ifPromiscuousMode); | |
419 | } | |
420 | ||
421 | ||
422 | /*_________________-----------------------------__________________ | |
423 | _________________ computeFlowSampleSize __________________ | |
424 | -----------------_____________________________------------------ | |
425 | */ | |
426 | ||
427 | static int computeFlowSampleSize(SFLReceiver *receiver, SFL_FLOW_SAMPLE_TYPE *fs) | |
428 | { | |
429 | SFLFlow_sample_element *elem = fs->elements; | |
430 | #ifdef SFL_USE_32BIT_INDEX | |
431 | u_int siz = 52; /* tag, length, sequence_number, ds_class, ds_index, sampling_rate, | |
432 | sample_pool, drops, inputFormat, input, outputFormat, output, number of elements */ | |
433 | #else | |
434 | u_int siz = 40; /* tag, length, sequence_number, source_id, sampling_rate, | |
435 | sample_pool, drops, input, output, number of elements */ | |
436 | #endif | |
437 | ||
438 | fs->num_elements = 0; /* we're going to count them again even if this was set by the client */ | |
439 | for(; elem != NULL; elem = elem->nxt) { | |
440 | u_int elemSiz = 0; | |
441 | fs->num_elements++; | |
442 | siz += 8; /* tag, length */ | |
443 | switch(elem->tag) { | |
444 | case SFLFLOW_HEADER: | |
445 | elemSiz = 16; /* header_protocol, frame_length, stripped, header_length */ | |
446 | elemSiz += ((elem->flowType.header.header_length + 3) / 4) * 4; /* header, rounded up to nearest 4 bytes */ | |
447 | break; | |
448 | case SFLFLOW_ETHERNET: elemSiz = sizeof(SFLSampled_ethernet); break; | |
449 | case SFLFLOW_IPV4: elemSiz = sizeof(SFLSampled_ipv4); break; | |
450 | case SFLFLOW_IPV6: elemSiz = sizeof(SFLSampled_ipv6); break; | |
451 | case SFLFLOW_EX_SWITCH: elemSiz = sizeof(SFLExtended_switch); break; | |
452 | case SFLFLOW_EX_ROUTER: elemSiz = routerEncodingLength(&elem->flowType.router); break; | |
453 | case SFLFLOW_EX_GATEWAY: elemSiz = gatewayEncodingLength(&elem->flowType.gateway); break; | |
454 | case SFLFLOW_EX_USER: elemSiz = userEncodingLength(&elem->flowType.user); break; | |
455 | case SFLFLOW_EX_URL: elemSiz = urlEncodingLength(&elem->flowType.url); break; | |
456 | case SFLFLOW_EX_MPLS: elemSiz = mplsEncodingLength(&elem->flowType.mpls); break; | |
457 | case SFLFLOW_EX_NAT: elemSiz = natEncodingLength(&elem->flowType.nat); break; | |
458 | case SFLFLOW_EX_MPLS_TUNNEL: elemSiz = mplsTunnelEncodingLength(&elem->flowType.mpls_tunnel); break; | |
459 | case SFLFLOW_EX_MPLS_VC: elemSiz = mplsVcEncodingLength(&elem->flowType.mpls_vc); break; | |
460 | case SFLFLOW_EX_MPLS_FTN: elemSiz = mplsFtnEncodingLength(&elem->flowType.mpls_ftn); break; | |
461 | case SFLFLOW_EX_MPLS_LDP_FEC: elemSiz = mplsLdpFecEncodingLength(&elem->flowType.mpls_ldp_fec); break; | |
462 | case SFLFLOW_EX_VLAN_TUNNEL: elemSiz = vlanTunnelEncodingLength(&elem->flowType.vlan_tunnel); break; | |
463 | default: | |
464 | sflError(receiver, "unexpected packet_data_tag"); | |
465 | return -1; | |
466 | break; | |
467 | } | |
468 | // cache the element size, and accumulate it into the overall FlowSample size | |
469 | elem->length = elemSiz; | |
470 | siz += elemSiz; | |
471 | } | |
472 | ||
473 | return siz; | |
474 | } | |
475 | ||
476 | /*_________________-------------------------------__________________ | |
477 | _________________ sfl_receiver_writeFlowSample __________________ | |
478 | -----------------_______________________________------------------ | |
479 | */ | |
480 | ||
481 | int sfl_receiver_writeFlowSample(SFLReceiver *receiver, SFL_FLOW_SAMPLE_TYPE *fs) | |
482 | { | |
483 | int packedSize; | |
484 | if(fs == NULL) return -1; | |
485 | if((packedSize = computeFlowSampleSize(receiver, fs)) == -1) return -1; | |
486 | ||
487 | // check in case this one sample alone is too big for the datagram | |
488 | // in fact - if it is even half as big then we should ditch it. Very | |
489 | // important to avoid overruning the packet buffer. | |
490 | if(packedSize > (int)(receiver->sFlowRcvrMaximumDatagramSize / 2)) { | |
491 | sflError(receiver, "flow sample too big for datagram"); | |
492 | return -1; | |
493 | } | |
494 | ||
495 | // if the sample pkt is full enough so that this sample might put | |
496 | // it over the limit, then we should send it now before going on. | |
497 | if((receiver->sampleCollector.pktlen + packedSize) >= receiver->sFlowRcvrMaximumDatagramSize) | |
498 | sendSample(receiver); | |
d295e8e9 | 499 | |
c72e245a BP |
500 | receiver->sampleCollector.numSamples++; |
501 | ||
502 | #ifdef SFL_USE_32BIT_INDEX | |
503 | putNet32(receiver, SFLFLOW_SAMPLE_EXPANDED); | |
504 | #else | |
505 | putNet32(receiver, SFLFLOW_SAMPLE); | |
506 | #endif | |
507 | ||
508 | putNet32(receiver, packedSize - 8); // don't include tag and len | |
509 | putNet32(receiver, fs->sequence_number); | |
510 | ||
511 | #ifdef SFL_USE_32BIT_INDEX | |
512 | putNet32(receiver, fs->ds_class); | |
513 | putNet32(receiver, fs->ds_index); | |
514 | #else | |
515 | putNet32(receiver, fs->source_id); | |
516 | #endif | |
517 | ||
518 | putNet32(receiver, fs->sampling_rate); | |
519 | putNet32(receiver, fs->sample_pool); | |
520 | putNet32(receiver, fs->drops); | |
521 | ||
522 | #ifdef SFL_USE_32BIT_INDEX | |
523 | putNet32(receiver, fs->inputFormat); | |
524 | putNet32(receiver, fs->input); | |
525 | putNet32(receiver, fs->outputFormat); | |
526 | putNet32(receiver, fs->output); | |
527 | #else | |
528 | putNet32(receiver, fs->input); | |
529 | putNet32(receiver, fs->output); | |
530 | #endif | |
531 | ||
532 | putNet32(receiver, fs->num_elements); | |
533 | ||
534 | { | |
535 | SFLFlow_sample_element *elem = fs->elements; | |
536 | for(; elem != NULL; elem = elem->nxt) { | |
d295e8e9 | 537 | |
c72e245a BP |
538 | putNet32(receiver, elem->tag); |
539 | putNet32(receiver, elem->length); // length cached in computeFlowSampleSize() | |
d295e8e9 | 540 | |
c72e245a BP |
541 | switch(elem->tag) { |
542 | case SFLFLOW_HEADER: | |
543 | putNet32(receiver, elem->flowType.header.header_protocol); | |
544 | putNet32(receiver, elem->flowType.header.frame_length); | |
545 | putNet32(receiver, elem->flowType.header.stripped); | |
546 | putNet32(receiver, elem->flowType.header.header_length); | |
547 | /* the header */ | |
548 | memcpy(receiver->sampleCollector.datap, elem->flowType.header.header_bytes, elem->flowType.header.header_length); | |
549 | /* round up to multiple of 4 to preserve alignment */ | |
550 | receiver->sampleCollector.datap += ((elem->flowType.header.header_length + 3) / 4); | |
551 | break; | |
552 | case SFLFLOW_ETHERNET: | |
553 | putNet32(receiver, elem->flowType.ethernet.eth_len); | |
554 | putMACAddress(receiver, elem->flowType.ethernet.src_mac); | |
555 | putMACAddress(receiver, elem->flowType.ethernet.dst_mac); | |
556 | putNet32(receiver, elem->flowType.ethernet.eth_type); | |
557 | break; | |
558 | case SFLFLOW_IPV4: | |
559 | putNet32(receiver, elem->flowType.ipv4.length); | |
560 | putNet32(receiver, elem->flowType.ipv4.protocol); | |
561 | put32(receiver, elem->flowType.ipv4.src_ip.addr); | |
562 | put32(receiver, elem->flowType.ipv4.dst_ip.addr); | |
563 | putNet32(receiver, elem->flowType.ipv4.src_port); | |
564 | putNet32(receiver, elem->flowType.ipv4.dst_port); | |
565 | putNet32(receiver, elem->flowType.ipv4.tcp_flags); | |
566 | putNet32(receiver, elem->flowType.ipv4.tos); | |
567 | break; | |
568 | case SFLFLOW_IPV6: | |
569 | putNet32(receiver, elem->flowType.ipv6.length); | |
570 | putNet32(receiver, elem->flowType.ipv6.protocol); | |
571 | put128(receiver, elem->flowType.ipv6.src_ip.addr); | |
572 | put128(receiver, elem->flowType.ipv6.dst_ip.addr); | |
573 | putNet32(receiver, elem->flowType.ipv6.src_port); | |
574 | putNet32(receiver, elem->flowType.ipv6.dst_port); | |
575 | putNet32(receiver, elem->flowType.ipv6.tcp_flags); | |
576 | putNet32(receiver, elem->flowType.ipv6.priority); | |
577 | break; | |
578 | case SFLFLOW_EX_SWITCH: putSwitch(receiver, &elem->flowType.sw); break; | |
579 | case SFLFLOW_EX_ROUTER: putRouter(receiver, &elem->flowType.router); break; | |
580 | case SFLFLOW_EX_GATEWAY: putGateway(receiver, &elem->flowType.gateway); break; | |
581 | case SFLFLOW_EX_USER: putUser(receiver, &elem->flowType.user); break; | |
582 | case SFLFLOW_EX_URL: putUrl(receiver, &elem->flowType.url); break; | |
583 | case SFLFLOW_EX_MPLS: putMpls(receiver, &elem->flowType.mpls); break; | |
584 | case SFLFLOW_EX_NAT: putNat(receiver, &elem->flowType.nat); break; | |
585 | case SFLFLOW_EX_MPLS_TUNNEL: putMplsTunnel(receiver, &elem->flowType.mpls_tunnel); break; | |
586 | case SFLFLOW_EX_MPLS_VC: putMplsVc(receiver, &elem->flowType.mpls_vc); break; | |
587 | case SFLFLOW_EX_MPLS_FTN: putMplsFtn(receiver, &elem->flowType.mpls_ftn); break; | |
588 | case SFLFLOW_EX_MPLS_LDP_FEC: putMplsLdpFec(receiver, &elem->flowType.mpls_ldp_fec); break; | |
589 | case SFLFLOW_EX_VLAN_TUNNEL: putVlanTunnel(receiver, &elem->flowType.vlan_tunnel); break; | |
590 | default: | |
591 | sflError(receiver, "unexpected packet_data_tag"); | |
592 | return -1; | |
593 | break; | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
598 | // sanity check | |
599 | assert(((u_char *)receiver->sampleCollector.datap | |
600 | - (u_char *)receiver->sampleCollector.data | |
601 | - receiver->sampleCollector.pktlen) == (u_int32_t)packedSize); | |
602 | ||
603 | // update the pktlen | |
604 | receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data; | |
605 | return packedSize; | |
606 | } | |
607 | ||
608 | /*_________________-----------------------------__________________ | |
609 | _________________ computeCountersSampleSize __________________ | |
610 | -----------------_____________________________------------------ | |
611 | */ | |
612 | ||
613 | static int computeCountersSampleSize(SFLReceiver *receiver, SFL_COUNTERS_SAMPLE_TYPE *cs) | |
614 | { | |
615 | SFLCounters_sample_element *elem = cs->elements; | |
616 | #ifdef SFL_USE_32BIT_INDEX | |
617 | u_int siz = 24; /* tag, length, sequence_number, ds_class, ds_index, number of elements */ | |
618 | #else | |
619 | u_int siz = 20; /* tag, length, sequence_number, source_id, number of elements */ | |
620 | #endif | |
621 | ||
622 | cs->num_elements = 0; /* we're going to count them again even if this was set by the client */ | |
623 | for(; elem != NULL; elem = elem->nxt) { | |
624 | u_int elemSiz = 0; | |
625 | cs->num_elements++; | |
626 | siz += 8; /* tag, length */ | |
627 | switch(elem->tag) { | |
628 | case SFLCOUNTERS_GENERIC: elemSiz = sizeof(elem->counterBlock.generic); break; | |
629 | case SFLCOUNTERS_ETHERNET: elemSiz = sizeof(elem->counterBlock.ethernet); break; | |
630 | case SFLCOUNTERS_TOKENRING: elemSiz = sizeof(elem->counterBlock.tokenring); break; | |
631 | case SFLCOUNTERS_VG: elemSiz = sizeof(elem->counterBlock.vg); break; | |
632 | case SFLCOUNTERS_VLAN: elemSiz = sizeof(elem->counterBlock.vlan); break; | |
633 | default: | |
634 | sflError(receiver, "unexpected counters_tag"); | |
635 | return -1; | |
636 | break; | |
637 | } | |
638 | // cache the element size, and accumulate it into the overall FlowSample size | |
639 | elem->length = elemSiz; | |
640 | siz += elemSiz; | |
641 | } | |
642 | return siz; | |
643 | } | |
644 | ||
645 | /*_________________----------------------------------__________________ | |
646 | _________________ sfl_receiver_writeCountersSample __________________ | |
647 | -----------------__________________________________------------------ | |
648 | */ | |
649 | ||
650 | int sfl_receiver_writeCountersSample(SFLReceiver *receiver, SFL_COUNTERS_SAMPLE_TYPE *cs) | |
651 | { | |
652 | int packedSize; | |
653 | if(cs == NULL) return -1; | |
654 | // if the sample pkt is full enough so that this sample might put | |
655 | // it over the limit, then we should send it now. | |
656 | if((packedSize = computeCountersSampleSize(receiver, cs)) == -1) return -1; | |
d295e8e9 | 657 | |
c72e245a BP |
658 | // check in case this one sample alone is too big for the datagram |
659 | // in fact - if it is even half as big then we should ditch it. Very | |
660 | // important to avoid overruning the packet buffer. | |
661 | if(packedSize > (int)(receiver->sFlowRcvrMaximumDatagramSize / 2)) { | |
662 | sflError(receiver, "counters sample too big for datagram"); | |
663 | return -1; | |
664 | } | |
d295e8e9 | 665 | |
c72e245a BP |
666 | if((receiver->sampleCollector.pktlen + packedSize) >= receiver->sFlowRcvrMaximumDatagramSize) |
667 | sendSample(receiver); | |
d295e8e9 | 668 | |
c72e245a | 669 | receiver->sampleCollector.numSamples++; |
d295e8e9 | 670 | |
c72e245a BP |
671 | #ifdef SFL_USE_32BIT_INDEX |
672 | putNet32(receiver, SFLCOUNTERS_SAMPLE_EXPANDED); | |
673 | #else | |
674 | putNet32(receiver, SFLCOUNTERS_SAMPLE); | |
675 | #endif | |
676 | ||
677 | putNet32(receiver, packedSize - 8); // tag and length not included | |
678 | putNet32(receiver, cs->sequence_number); | |
679 | ||
680 | #ifdef SFL_USE_32BIT_INDEX | |
681 | putNet32(receiver, cs->ds_class); | |
682 | putNet32(receiver, cs->ds_index); | |
683 | #else | |
684 | putNet32(receiver, cs->source_id); | |
685 | #endif | |
686 | ||
687 | putNet32(receiver, cs->num_elements); | |
d295e8e9 | 688 | |
c72e245a BP |
689 | { |
690 | SFLCounters_sample_element *elem = cs->elements; | |
691 | for(; elem != NULL; elem = elem->nxt) { | |
d295e8e9 | 692 | |
c72e245a BP |
693 | putNet32(receiver, elem->tag); |
694 | putNet32(receiver, elem->length); // length cached in computeCountersSampleSize() | |
d295e8e9 | 695 | |
c72e245a BP |
696 | switch(elem->tag) { |
697 | case SFLCOUNTERS_GENERIC: | |
698 | putGenericCounters(receiver, &(elem->counterBlock.generic)); | |
699 | break; | |
700 | case SFLCOUNTERS_ETHERNET: | |
701 | // all these counters are 32-bit | |
702 | putNet32_run(receiver, &elem->counterBlock.ethernet, sizeof(elem->counterBlock.ethernet) / 4); | |
703 | break; | |
704 | case SFLCOUNTERS_TOKENRING: | |
705 | // all these counters are 32-bit | |
706 | putNet32_run(receiver, &elem->counterBlock.tokenring, sizeof(elem->counterBlock.tokenring) / 4); | |
707 | break; | |
708 | case SFLCOUNTERS_VG: | |
709 | // mixed sizes | |
710 | putNet32(receiver, elem->counterBlock.vg.dot12InHighPriorityFrames); | |
711 | putNet64(receiver, elem->counterBlock.vg.dot12InHighPriorityOctets); | |
712 | putNet32(receiver, elem->counterBlock.vg.dot12InNormPriorityFrames); | |
713 | putNet64(receiver, elem->counterBlock.vg.dot12InNormPriorityOctets); | |
714 | putNet32(receiver, elem->counterBlock.vg.dot12InIPMErrors); | |
715 | putNet32(receiver, elem->counterBlock.vg.dot12InOversizeFrameErrors); | |
716 | putNet32(receiver, elem->counterBlock.vg.dot12InDataErrors); | |
717 | putNet32(receiver, elem->counterBlock.vg.dot12InNullAddressedFrames); | |
718 | putNet32(receiver, elem->counterBlock.vg.dot12OutHighPriorityFrames); | |
719 | putNet64(receiver, elem->counterBlock.vg.dot12OutHighPriorityOctets); | |
720 | putNet32(receiver, elem->counterBlock.vg.dot12TransitionIntoTrainings); | |
721 | putNet64(receiver, elem->counterBlock.vg.dot12HCInHighPriorityOctets); | |
722 | putNet64(receiver, elem->counterBlock.vg.dot12HCInNormPriorityOctets); | |
723 | putNet64(receiver, elem->counterBlock.vg.dot12HCOutHighPriorityOctets); | |
724 | break; | |
725 | case SFLCOUNTERS_VLAN: | |
726 | // mixed sizes | |
727 | putNet32(receiver, elem->counterBlock.vlan.vlan_id); | |
728 | putNet64(receiver, elem->counterBlock.vlan.octets); | |
729 | putNet32(receiver, elem->counterBlock.vlan.ucastPkts); | |
730 | putNet32(receiver, elem->counterBlock.vlan.multicastPkts); | |
731 | putNet32(receiver, elem->counterBlock.vlan.broadcastPkts); | |
732 | putNet32(receiver, elem->counterBlock.vlan.discards); | |
733 | break; | |
734 | default: | |
735 | sflError(receiver, "unexpected counters_tag"); | |
736 | return -1; | |
737 | break; | |
738 | } | |
739 | } | |
740 | } | |
741 | // sanity check | |
742 | assert(((u_char *)receiver->sampleCollector.datap | |
743 | - (u_char *)receiver->sampleCollector.data | |
744 | - receiver->sampleCollector.pktlen) == (u_int32_t)packedSize); | |
745 | ||
746 | // update the pktlen | |
747 | receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data; | |
748 | return packedSize; | |
749 | } | |
750 | ||
751 | /*_________________---------------------------------__________________ | |
752 | _________________ sfl_receiver_samplePacketsSent __________________ | |
753 | -----------------_________________________________------------------ | |
754 | */ | |
755 | ||
756 | u_int32_t sfl_receiver_samplePacketsSent(SFLReceiver *receiver) | |
757 | { | |
758 | return receiver->sampleCollector.packetSeqNo; | |
759 | } | |
760 | ||
761 | /*_________________---------------------------__________________ | |
762 | _________________ sendSample __________________ | |
763 | -----------------___________________________------------------ | |
764 | */ | |
765 | ||
766 | static void sendSample(SFLReceiver *receiver) | |
d295e8e9 | 767 | { |
c72e245a BP |
768 | /* construct and send out the sample, then reset for the next one... */ |
769 | /* first fill in the header with the latest values */ | |
770 | /* version, agent_address and sub_agent_id were pre-set. */ | |
771 | u_int32_t hdrIdx = (receiver->agent->myIP.type == SFLADDRESSTYPE_IP_V6) ? 7 : 4; | |
772 | receiver->sampleCollector.data[hdrIdx++] = htonl(++receiver->sampleCollector.packetSeqNo); /* seq no */ | |
773 | receiver->sampleCollector.data[hdrIdx++] = htonl((receiver->agent->now - receiver->agent->bootTime) * 1000); /* uptime */ | |
774 | receiver->sampleCollector.data[hdrIdx++] = htonl(receiver->sampleCollector.numSamples); /* num samples */ | |
775 | /* send */ | |
776 | if(receiver->agent->sendFn) (*receiver->agent->sendFn)(receiver->agent->magic, | |
777 | receiver->agent, | |
778 | receiver, | |
d295e8e9 | 779 | (u_char *)receiver->sampleCollector.data, |
c72e245a BP |
780 | receiver->sampleCollector.pktlen); |
781 | else { | |
782 | #ifdef SFLOW_DO_SOCKET | |
783 | /* send it myself */ | |
784 | if (receiver->sFlowRcvrAddress.type == SFLADDRESSTYPE_IP_V6) { | |
785 | u_int32_t soclen = sizeof(struct sockaddr_in6); | |
786 | int result = sendto(receiver->agent->receiverSocket6, | |
787 | receiver->sampleCollector.data, | |
788 | receiver->sampleCollector.pktlen, | |
789 | 0, | |
790 | (struct sockaddr *)&receiver->receiver6, | |
791 | soclen); | |
792 | if(result == -1 && errno != EINTR) sfl_agent_sysError(receiver->agent, "receiver", "IPv6 socket sendto error"); | |
793 | if(result == 0) sfl_agent_error(receiver->agent, "receiver", "IPv6 socket sendto returned 0"); | |
794 | } | |
795 | else { | |
796 | u_int32_t soclen = sizeof(struct sockaddr_in); | |
797 | int result = sendto(receiver->agent->receiverSocket4, | |
798 | receiver->sampleCollector.data, | |
799 | receiver->sampleCollector.pktlen, | |
800 | 0, | |
801 | (struct sockaddr *)&receiver->receiver4, | |
802 | soclen); | |
803 | if(result == -1 && errno != EINTR) sfl_agent_sysError(receiver->agent, "receiver", "socket sendto error"); | |
804 | if(result == 0) sfl_agent_error(receiver->agent, "receiver", "socket sendto returned 0"); | |
805 | } | |
806 | #endif | |
807 | } | |
808 | ||
809 | /* reset for the next time */ | |
810 | resetSampleCollector(receiver); | |
811 | } | |
812 | ||
813 | /*_________________---------------------------__________________ | |
814 | _________________ resetSampleCollector __________________ | |
815 | -----------------___________________________------------------ | |
816 | */ | |
817 | ||
818 | static void resetSampleCollector(SFLReceiver *receiver) | |
819 | { | |
820 | receiver->sampleCollector.pktlen = 0; | |
821 | receiver->sampleCollector.numSamples = 0; | |
822 | /* point the datap to just after the header */ | |
823 | receiver->sampleCollector.datap = (receiver->agent->myIP.type == SFLADDRESSTYPE_IP_V6) ? | |
824 | (receiver->sampleCollector.data + 10) : (receiver->sampleCollector.data + 7); | |
825 | ||
826 | receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data; | |
827 | } | |
828 | ||
829 | /*_________________---------------------------__________________ | |
830 | _________________ sflError __________________ | |
831 | -----------------___________________________------------------ | |
832 | */ | |
833 | ||
834 | static void sflError(SFLReceiver *receiver, char *msg) | |
835 | { | |
836 | sfl_agent_error(receiver->agent, "receiver", msg); | |
837 | resetSampleCollector(receiver); | |
838 | } | |
6506f45c BP |
839 | |
840 | #endif /* !__CHECKER__ */ |