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ofp-print: Print bucket ids of OpenFlow 1.5 group messages.
[mirror_ovs.git] / lib / sflow_receiver.c
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7dd32dff
NM		 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
13static void resetSampleCollector(SFLReceiver *receiver);
14static void sendSample(SFLReceiver *receiver);
15static void sflError(SFLReceiver *receiver, char *errm);
16inline static void putNet32(SFLReceiver *receiver, u_int32_t val);
17inline static void putAddress(SFLReceiver *receiver, SFLAddress *addr);
18#ifdef SFLOW_DO_SOCKET
19static void initSocket(SFLReceiver *receiver);
20#endif
21
22/*_________________--------------------------__________________
23 _________________ sfl_receiver_init __________________
24 -----------------__________________________------------------
25*/
26
27void 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
61static 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
74static 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
95char * sfl_receiver_get_sFlowRcvrOwner(SFLReceiver *receiver) {
96 return receiver->sFlowRcvrOwner;
97}
98void 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}
105time_t sfl_receiver_get_sFlowRcvrTimeout(SFLReceiver *receiver) {
106 return receiver->sFlowRcvrTimeout;
107}
108void sfl_receiver_set_sFlowRcvrTimeout(SFLReceiver *receiver, time_t sFlowRcvrTimeout) {
109 receiver->sFlowRcvrTimeout =sFlowRcvrTimeout;
d295e8e9 110}
c72e245a
BP		 111u_int32_t sfl_receiver_get_sFlowRcvrMaximumDatagramSize(SFLReceiver *receiver) {
112 return receiver->sFlowRcvrMaximumDatagramSize;
113}
114void 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}
119SFLAddress *sfl_receiver_get_sFlowRcvrAddress(SFLReceiver *receiver) {
120 return &receiver->sFlowRcvrAddress;
121}
122void 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}
128u_int32_t sfl_receiver_get_sFlowRcvrPort(SFLReceiver *receiver) {
129 return receiver->sFlowRcvrPort;
130}
131void 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
144void 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		 160inline static void put32(SFLReceiver *receiver, u_int32_t val)
161{
162 *receiver->sampleCollector.datap++ = val;
163}
164
165inline static void putNet32(SFLReceiver *receiver, u_int32_t val)
166{
167 *receiver->sampleCollector.datap++ = htonl(val);
168}
169
170inline 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
176inline 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
190inline static void put128(SFLReceiver *receiver, u_char *val)
191{
192 memcpy(receiver->sampleCollector.datap, val, 16);
193 receiver->sampleCollector.datap += 4;
194}
195
196inline 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 */
2e275c0e
FF		 201 if ((s->len % 4) != 0){
202 u_int8_t padding = 4 - (s->len % 4);
203 memset(((u_int8_t*)receiver->sampleCollector.datap)-padding, 0, padding);
204 }
c72e245a
BP		 205}
206
207inline static u_int32_t stringEncodingLength(SFLString *s) {
208 // answer in bytes, so remember to mulitply by 4 after rounding up to nearest 4-byte boundary
209 return 4 + (((s->len + 3) / 4) * 4);
210}
211
212inline static void putAddress(SFLReceiver *receiver, SFLAddress *addr)
213{
214 // encode unspecified addresses as IPV4:0.0.0.0 - or should we flag this as an error?
215 if(addr->type == 0) {
216 putNet32(receiver, SFLADDRESSTYPE_IP_V4);
217 put32(receiver, 0);
218 }
219 else {
220 putNet32(receiver, addr->type);
221 if(addr->type == SFLADDRESSTYPE_IP_V4) put32(receiver, addr->address.ip_v4.addr);
222 else put128(receiver, addr->address.ip_v6.addr);
223 }
224}
225
226inline static u_int32_t addressEncodingLength(SFLAddress *addr) {
227 return (addr->type == SFLADDRESSTYPE_IP_V6) ? 20 : 8; // type + address (unspecified == IPV4)
228}
229
230inline static void putMACAddress(SFLReceiver *receiver, u_int8_t *mac)
231{
232 memcpy(receiver->sampleCollector.datap, mac, 6);
233 receiver->sampleCollector.datap += 2;
234}
235
236inline static void putSwitch(SFLReceiver *receiver, SFLExtended_switch *sw)
237{
238 putNet32(receiver, sw->src_vlan);
239 putNet32(receiver, sw->src_priority);
240 putNet32(receiver, sw->dst_vlan);
241 putNet32(receiver, sw->dst_priority);
242}
243
244inline static void putRouter(SFLReceiver *receiver, SFLExtended_router *router)
245{
246 putAddress(receiver, &router->nexthop);
247 putNet32(receiver, router->src_mask);
248 putNet32(receiver, router->dst_mask);
249}
250
251inline static u_int32_t routerEncodingLength(SFLExtended_router *router) {
252 return addressEncodingLength(&router->nexthop) + 8;
253}
254
255inline static void putGateway(SFLReceiver *receiver, SFLExtended_gateway *gw)
256{
257 putAddress(receiver, &gw->nexthop);
258 putNet32(receiver, gw->as);
259 putNet32(receiver, gw->src_as);
260 putNet32(receiver, gw->src_peer_as);
261 putNet32(receiver, gw->dst_as_path_segments);
262 {
263 u_int32_t seg = 0;
264 for(; seg < gw->dst_as_path_segments; seg++) {
265 putNet32(receiver, gw->dst_as_path[seg].type);
266 putNet32(receiver, gw->dst_as_path[seg].length);
267 putNet32_run(receiver, gw->dst_as_path[seg].as.seq, gw->dst_as_path[seg].length);
268 }
269 }
270 putNet32(receiver, gw->communities_length);
271 putNet32_run(receiver, gw->communities, gw->communities_length);
272 putNet32(receiver, gw->localpref);
273}
274
275inline static u_int32_t gatewayEncodingLength(SFLExtended_gateway *gw) {
276 u_int32_t elemSiz = addressEncodingLength(&gw->nexthop);
277 u_int32_t seg = 0;
d295e8e9 278 elemSiz += 16; // as, src_as, src_peer_as, dst_as_path_segments
c72e245a 279 for(; seg < gw->dst_as_path_segments; seg++) {
d295e8e9 280 elemSiz += 8; // type, length
c72e245a
BP		 281 elemSiz += 4 * gw->dst_as_path[seg].length; // set/seq bytes
282 }
283 elemSiz += 4; // communities_length
284 elemSiz += 4 * gw->communities_length; // communities
285 elemSiz += 4; // localpref
286 return elemSiz;
287}
288
289inline static void putUser(SFLReceiver *receiver, SFLExtended_user *user)
290{
291 putNet32(receiver, user->src_charset);
292 putString(receiver, &user->src_user);
293 putNet32(receiver, user->dst_charset);
294 putString(receiver, &user->dst_user);
295}
296
297inline static u_int32_t userEncodingLength(SFLExtended_user *user) {
298 return 4
299 + stringEncodingLength(&user->src_user)
300 + 4
301 + stringEncodingLength(&user->dst_user);
302}
303
304inline static void putUrl(SFLReceiver *receiver, SFLExtended_url *url)
305{
306 putNet32(receiver, url->direction);
307 putString(receiver, &url->url);
308 putString(receiver, &url->host);
309}
310
311inline static u_int32_t urlEncodingLength(SFLExtended_url *url) {
312 return 4
313 + stringEncodingLength(&url->url)
314 + stringEncodingLength(&url->host);
315}
316
317inline static void putLabelStack(SFLReceiver *receiver, SFLLabelStack *labelStack)
318{
319 putNet32(receiver, labelStack->depth);
320 putNet32_run(receiver, labelStack->stack, labelStack->depth);
321}
322
323inline static u_int32_t labelStackEncodingLength(SFLLabelStack *labelStack) {
324 return 4 + (4 * labelStack->depth);
325}
326
327inline static void putMpls(SFLReceiver *receiver, SFLExtended_mpls *mpls)
328{
329 putAddress(receiver, &mpls->nextHop);
330 putLabelStack(receiver, &mpls->in_stack);
331 putLabelStack(receiver, &mpls->out_stack);
332}
333
334inline static u_int32_t mplsEncodingLength(SFLExtended_mpls *mpls) {
335 return addressEncodingLength(&mpls->nextHop)
336 + labelStackEncodingLength(&mpls->in_stack)
337 + labelStackEncodingLength(&mpls->out_stack);
338}
339
340inline static void putNat(SFLReceiver *receiver, SFLExtended_nat *nat)
341{
342 putAddress(receiver, &nat->src);
343 putAddress(receiver, &nat->dst);
344}
345
346inline static u_int32_t natEncodingLength(SFLExtended_nat *nat) {
347 return addressEncodingLength(&nat->src)
348 + addressEncodingLength(&nat->dst);
349}
350
351inline static void putMplsTunnel(SFLReceiver *receiver, SFLExtended_mpls_tunnel *tunnel)
352{
353 putString(receiver, &tunnel->tunnel_lsp_name);
354 putNet32(receiver, tunnel->tunnel_id);
355 putNet32(receiver, tunnel->tunnel_cos);
356}
357
358inline static u_int32_t mplsTunnelEncodingLength(SFLExtended_mpls_tunnel *tunnel) {
359 return stringEncodingLength(&tunnel->tunnel_lsp_name) + 8;
360}
361
362inline static void putMplsVc(SFLReceiver *receiver, SFLExtended_mpls_vc *vc)
363{
364 putString(receiver, &vc->vc_instance_name);
365 putNet32(receiver, vc->vll_vc_id);
366 putNet32(receiver, vc->vc_label_cos);
367}
368
369inline static u_int32_t mplsVcEncodingLength(SFLExtended_mpls_vc *vc) {
370 return stringEncodingLength( &vc->vc_instance_name) + 8;
371}
372
373inline static void putMplsFtn(SFLReceiver *receiver, SFLExtended_mpls_FTN *ftn)
374{
375 putString(receiver, &ftn->mplsFTNDescr);
376 putNet32(receiver, ftn->mplsFTNMask);
377}
378
379inline static u_int32_t mplsFtnEncodingLength(SFLExtended_mpls_FTN *ftn) {
380 return stringEncodingLength( &ftn->mplsFTNDescr) + 4;
381}
382
383inline static void putMplsLdpFec(SFLReceiver *receiver, SFLExtended_mpls_LDP_FEC *ldpfec)
384{
385 putNet32(receiver, ldpfec->mplsFecAddrPrefixLength);
386}
387
388inline static u_int32_t mplsLdpFecEncodingLength(SFLExtended_mpls_LDP_FEC *ldpfec) {
389 return 4;
390}
391
392inline static void putVlanTunnel(SFLReceiver *receiver, SFLExtended_vlan_tunnel *vlanTunnel)
393{
394 putLabelStack(receiver, &vlanTunnel->stack);
395}
396
397inline static u_int32_t vlanTunnelEncodingLength(SFLExtended_vlan_tunnel *vlanTunnel) {
398 return labelStackEncodingLength(&vlanTunnel->stack);
399}
400
401
402inline static void putGenericCounters(SFLReceiver *receiver, SFLIf_counters *counters)
403{
404 putNet32(receiver, counters->ifIndex);
405 putNet32(receiver, counters->ifType);
406 putNet64(receiver, counters->ifSpeed);
407 putNet32(receiver, counters->ifDirection);
408 putNet32(receiver, counters->ifStatus);
409 putNet64(receiver, counters->ifInOctets);
410 putNet32(receiver, counters->ifInUcastPkts);
411 putNet32(receiver, counters->ifInMulticastPkts);
412 putNet32(receiver, counters->ifInBroadcastPkts);
413 putNet32(receiver, counters->ifInDiscards);
414 putNet32(receiver, counters->ifInErrors);
415 putNet32(receiver, counters->ifInUnknownProtos);
416 putNet64(receiver, counters->ifOutOctets);
417 putNet32(receiver, counters->ifOutUcastPkts);
418 putNet32(receiver, counters->ifOutMulticastPkts);
419 putNet32(receiver, counters->ifOutBroadcastPkts);
420 putNet32(receiver, counters->ifOutDiscards);
421 putNet32(receiver, counters->ifOutErrors);
422 putNet32(receiver, counters->ifPromiscuousMode);
423}
424
425
426/*_________________-----------------------------__________________
427 _________________ computeFlowSampleSize __________________
428 -----------------_____________________________------------------
429*/
430
431static int computeFlowSampleSize(SFLReceiver *receiver, SFL_FLOW_SAMPLE_TYPE *fs)
432{
433 SFLFlow_sample_element *elem = fs->elements;
434#ifdef SFL_USE_32BIT_INDEX
435 u_int siz = 52; /* tag, length, sequence_number, ds_class, ds_index, sampling_rate,
436 sample_pool, drops, inputFormat, input, outputFormat, output, number of elements */
437#else
438 u_int siz = 40; /* tag, length, sequence_number, source_id, sampling_rate,
439 sample_pool, drops, input, output, number of elements */
440#endif
441
442 fs->num_elements = 0; /* we're going to count them again even if this was set by the client */
443 for(; elem != NULL; elem = elem->nxt) {
444 u_int elemSiz = 0;
445 fs->num_elements++;
446 siz += 8; /* tag, length */
447 switch(elem->tag) {
448 case SFLFLOW_HEADER:
449 elemSiz = 16; /* header_protocol, frame_length, stripped, header_length */
450 elemSiz += ((elem->flowType.header.header_length + 3) / 4) * 4; /* header, rounded up to nearest 4 bytes */
451 break;
452 case SFLFLOW_ETHERNET: elemSiz = sizeof(SFLSampled_ethernet); break;
453 case SFLFLOW_IPV4: elemSiz = sizeof(SFLSampled_ipv4); break;
454 case SFLFLOW_IPV6: elemSiz = sizeof(SFLSampled_ipv6); break;
455 case SFLFLOW_EX_SWITCH: elemSiz = sizeof(SFLExtended_switch); break;
456 case SFLFLOW_EX_ROUTER: elemSiz = routerEncodingLength(&elem->flowType.router); break;
457 case SFLFLOW_EX_GATEWAY: elemSiz = gatewayEncodingLength(&elem->flowType.gateway); break;
458 case SFLFLOW_EX_USER: elemSiz = userEncodingLength(&elem->flowType.user); break;
459 case SFLFLOW_EX_URL: elemSiz = urlEncodingLength(&elem->flowType.url); break;
460 case SFLFLOW_EX_MPLS: elemSiz = mplsEncodingLength(&elem->flowType.mpls); break;
461 case SFLFLOW_EX_NAT: elemSiz = natEncodingLength(&elem->flowType.nat); break;
462 case SFLFLOW_EX_MPLS_TUNNEL: elemSiz = mplsTunnelEncodingLength(&elem->flowType.mpls_tunnel); break;
463 case SFLFLOW_EX_MPLS_VC: elemSiz = mplsVcEncodingLength(&elem->flowType.mpls_vc); break;
464 case SFLFLOW_EX_MPLS_FTN: elemSiz = mplsFtnEncodingLength(&elem->flowType.mpls_ftn); break;
465 case SFLFLOW_EX_MPLS_LDP_FEC: elemSiz = mplsLdpFecEncodingLength(&elem->flowType.mpls_ldp_fec); break;
466 case SFLFLOW_EX_VLAN_TUNNEL: elemSiz = vlanTunnelEncodingLength(&elem->flowType.vlan_tunnel); break;
467 default:
468 sflError(receiver, "unexpected packet_data_tag");
469 return -1;
470 break;
471 }
472 // cache the element size, and accumulate it into the overall FlowSample size
473 elem->length = elemSiz;
474 siz += elemSiz;
475 }
476
477 return siz;
478}
479
480/*_________________-------------------------------__________________
481 _________________ sfl_receiver_writeFlowSample __________________
482 -----------------_______________________________------------------
483*/
484
485int sfl_receiver_writeFlowSample(SFLReceiver *receiver, SFL_FLOW_SAMPLE_TYPE *fs)
486{
487 int packedSize;
488 if(fs == NULL) return -1;
489 if((packedSize = computeFlowSampleSize(receiver, fs)) == -1) return -1;
490
491 // check in case this one sample alone is too big for the datagram
492 // in fact - if it is even half as big then we should ditch it. Very
493 // important to avoid overruning the packet buffer.
494 if(packedSize > (int)(receiver->sFlowRcvrMaximumDatagramSize / 2)) {
495 sflError(receiver, "flow sample too big for datagram");
496 return -1;
497 }
498
499 // if the sample pkt is full enough so that this sample might put
500 // it over the limit, then we should send it now before going on.
501 if((receiver->sampleCollector.pktlen + packedSize) >= receiver->sFlowRcvrMaximumDatagramSize)
502 sendSample(receiver);
d295e8e9 503
c72e245a
BP		 504 receiver->sampleCollector.numSamples++;
505
506#ifdef SFL_USE_32BIT_INDEX
507 putNet32(receiver, SFLFLOW_SAMPLE_EXPANDED);
508#else
509 putNet32(receiver, SFLFLOW_SAMPLE);
510#endif
511
512 putNet32(receiver, packedSize - 8); // don't include tag and len
513 putNet32(receiver, fs->sequence_number);
514
515#ifdef SFL_USE_32BIT_INDEX
516 putNet32(receiver, fs->ds_class);
517 putNet32(receiver, fs->ds_index);
518#else
519 putNet32(receiver, fs->source_id);
520#endif
521
522 putNet32(receiver, fs->sampling_rate);
523 putNet32(receiver, fs->sample_pool);
524 putNet32(receiver, fs->drops);
525
526#ifdef SFL_USE_32BIT_INDEX
527 putNet32(receiver, fs->inputFormat);
528 putNet32(receiver, fs->input);
529 putNet32(receiver, fs->outputFormat);
530 putNet32(receiver, fs->output);
531#else
532 putNet32(receiver, fs->input);
533 putNet32(receiver, fs->output);
534#endif
535
536 putNet32(receiver, fs->num_elements);
537
538 {
539 SFLFlow_sample_element *elem = fs->elements;
540 for(; elem != NULL; elem = elem->nxt) {
d295e8e9 541
c72e245a
BP		 542 putNet32(receiver, elem->tag);
543 putNet32(receiver, elem->length); // length cached in computeFlowSampleSize()
d295e8e9 544
c72e245a
BP		 545 switch(elem->tag) {
546 case SFLFLOW_HEADER:
547 putNet32(receiver, elem->flowType.header.header_protocol);
548 putNet32(receiver, elem->flowType.header.frame_length);
549 putNet32(receiver, elem->flowType.header.stripped);
550 putNet32(receiver, elem->flowType.header.header_length);
551 /* the header */
552 memcpy(receiver->sampleCollector.datap, elem->flowType.header.header_bytes, elem->flowType.header.header_length);
553 /* round up to multiple of 4 to preserve alignment */
554 receiver->sampleCollector.datap += ((elem->flowType.header.header_length + 3) / 4);
555 break;
556 case SFLFLOW_ETHERNET:
557 putNet32(receiver, elem->flowType.ethernet.eth_len);
558 putMACAddress(receiver, elem->flowType.ethernet.src_mac);
559 putMACAddress(receiver, elem->flowType.ethernet.dst_mac);
560 putNet32(receiver, elem->flowType.ethernet.eth_type);
561 break;
562 case SFLFLOW_IPV4:
563 putNet32(receiver, elem->flowType.ipv4.length);
564 putNet32(receiver, elem->flowType.ipv4.protocol);
565 put32(receiver, elem->flowType.ipv4.src_ip.addr);
566 put32(receiver, elem->flowType.ipv4.dst_ip.addr);
567 putNet32(receiver, elem->flowType.ipv4.src_port);
568 putNet32(receiver, elem->flowType.ipv4.dst_port);
569 putNet32(receiver, elem->flowType.ipv4.tcp_flags);
570 putNet32(receiver, elem->flowType.ipv4.tos);
571 break;
572 case SFLFLOW_IPV6:
573 putNet32(receiver, elem->flowType.ipv6.length);
574 putNet32(receiver, elem->flowType.ipv6.protocol);
575 put128(receiver, elem->flowType.ipv6.src_ip.addr);
576 put128(receiver, elem->flowType.ipv6.dst_ip.addr);
577 putNet32(receiver, elem->flowType.ipv6.src_port);
578 putNet32(receiver, elem->flowType.ipv6.dst_port);
579 putNet32(receiver, elem->flowType.ipv6.tcp_flags);
580 putNet32(receiver, elem->flowType.ipv6.priority);
581 break;
582 case SFLFLOW_EX_SWITCH: putSwitch(receiver, &elem->flowType.sw); break;
583 case SFLFLOW_EX_ROUTER: putRouter(receiver, &elem->flowType.router); break;
584 case SFLFLOW_EX_GATEWAY: putGateway(receiver, &elem->flowType.gateway); break;
585 case SFLFLOW_EX_USER: putUser(receiver, &elem->flowType.user); break;
586 case SFLFLOW_EX_URL: putUrl(receiver, &elem->flowType.url); break;
587 case SFLFLOW_EX_MPLS: putMpls(receiver, &elem->flowType.mpls); break;
588 case SFLFLOW_EX_NAT: putNat(receiver, &elem->flowType.nat); break;
589 case SFLFLOW_EX_MPLS_TUNNEL: putMplsTunnel(receiver, &elem->flowType.mpls_tunnel); break;
590 case SFLFLOW_EX_MPLS_VC: putMplsVc(receiver, &elem->flowType.mpls_vc); break;
591 case SFLFLOW_EX_MPLS_FTN: putMplsFtn(receiver, &elem->flowType.mpls_ftn); break;
592 case SFLFLOW_EX_MPLS_LDP_FEC: putMplsLdpFec(receiver, &elem->flowType.mpls_ldp_fec); break;
593 case SFLFLOW_EX_VLAN_TUNNEL: putVlanTunnel(receiver, &elem->flowType.vlan_tunnel); break;
594 default:
595 sflError(receiver, "unexpected packet_data_tag");
596 return -1;
597 break;
598 }
599 }
600 }
601
602 // sanity check
603 assert(((u_char *)receiver->sampleCollector.datap
604 - (u_char *)receiver->sampleCollector.data
605 - receiver->sampleCollector.pktlen) == (u_int32_t)packedSize);
606
607 // update the pktlen
608 receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data;
609 return packedSize;
610}
611
612/*_________________-----------------------------__________________
613 _________________ computeCountersSampleSize __________________
614 -----------------_____________________________------------------
615*/
616
617static int computeCountersSampleSize(SFLReceiver *receiver, SFL_COUNTERS_SAMPLE_TYPE *cs)
618{
619 SFLCounters_sample_element *elem = cs->elements;
620#ifdef SFL_USE_32BIT_INDEX
621 u_int siz = 24; /* tag, length, sequence_number, ds_class, ds_index, number of elements */
622#else
623 u_int siz = 20; /* tag, length, sequence_number, source_id, number of elements */
624#endif
625
626 cs->num_elements = 0; /* we're going to count them again even if this was set by the client */
627 for(; elem != NULL; elem = elem->nxt) {
628 u_int elemSiz = 0;
629 cs->num_elements++;
630 siz += 8; /* tag, length */
631 switch(elem->tag) {
632 case SFLCOUNTERS_GENERIC: elemSiz = sizeof(elem->counterBlock.generic); break;
633 case SFLCOUNTERS_ETHERNET: elemSiz = sizeof(elem->counterBlock.ethernet); break;
634 case SFLCOUNTERS_TOKENRING: elemSiz = sizeof(elem->counterBlock.tokenring); break;
635 case SFLCOUNTERS_VG: elemSiz = sizeof(elem->counterBlock.vg); break;
636 case SFLCOUNTERS_VLAN: elemSiz = sizeof(elem->counterBlock.vlan); break;
637 default:
638 sflError(receiver, "unexpected counters_tag");
639 return -1;
640 break;
641 }
642 // cache the element size, and accumulate it into the overall FlowSample size
643 elem->length = elemSiz;
644 siz += elemSiz;
645 }
646 return siz;
647}
648
649/*_________________----------------------------------__________________
650 _________________ sfl_receiver_writeCountersSample __________________
651 -----------------__________________________________------------------
652*/
653
654int sfl_receiver_writeCountersSample(SFLReceiver *receiver, SFL_COUNTERS_SAMPLE_TYPE *cs)
655{
656 int packedSize;
657 if(cs == NULL) return -1;
658 // if the sample pkt is full enough so that this sample might put
659 // it over the limit, then we should send it now.
660 if((packedSize = computeCountersSampleSize(receiver, cs)) == -1) return -1;
d295e8e9 661
c72e245a
BP		 662 // check in case this one sample alone is too big for the datagram
663 // in fact - if it is even half as big then we should ditch it. Very
664 // important to avoid overruning the packet buffer.
665 if(packedSize > (int)(receiver->sFlowRcvrMaximumDatagramSize / 2)) {
666 sflError(receiver, "counters sample too big for datagram");
667 return -1;
668 }
d295e8e9 669
c72e245a
BP		 670 if((receiver->sampleCollector.pktlen + packedSize) >= receiver->sFlowRcvrMaximumDatagramSize)
671 sendSample(receiver);
d295e8e9 672
c72e245a 673 receiver->sampleCollector.numSamples++;
d295e8e9 674
c72e245a
BP		 675#ifdef SFL_USE_32BIT_INDEX
676 putNet32(receiver, SFLCOUNTERS_SAMPLE_EXPANDED);
677#else
678 putNet32(receiver, SFLCOUNTERS_SAMPLE);
679#endif
680
681 putNet32(receiver, packedSize - 8); // tag and length not included
682 putNet32(receiver, cs->sequence_number);
683
684#ifdef SFL_USE_32BIT_INDEX
685 putNet32(receiver, cs->ds_class);
686 putNet32(receiver, cs->ds_index);
687#else
688 putNet32(receiver, cs->source_id);
689#endif
690
691 putNet32(receiver, cs->num_elements);
d295e8e9 692
c72e245a
BP		 693 {
694 SFLCounters_sample_element *elem = cs->elements;
695 for(; elem != NULL; elem = elem->nxt) {
d295e8e9 696
c72e245a
BP		 697 putNet32(receiver, elem->tag);
698 putNet32(receiver, elem->length); // length cached in computeCountersSampleSize()
d295e8e9 699
c72e245a
BP		 700 switch(elem->tag) {
701 case SFLCOUNTERS_GENERIC:
702 putGenericCounters(receiver, &(elem->counterBlock.generic));
703 break;
704 case SFLCOUNTERS_ETHERNET:
705 // all these counters are 32-bit
706 putNet32_run(receiver, &elem->counterBlock.ethernet, sizeof(elem->counterBlock.ethernet) / 4);
707 break;
708 case SFLCOUNTERS_TOKENRING:
709 // all these counters are 32-bit
710 putNet32_run(receiver, &elem->counterBlock.tokenring, sizeof(elem->counterBlock.tokenring) / 4);
711 break;
712 case SFLCOUNTERS_VG:
713 // mixed sizes
714 putNet32(receiver, elem->counterBlock.vg.dot12InHighPriorityFrames);
715 putNet64(receiver, elem->counterBlock.vg.dot12InHighPriorityOctets);
716 putNet32(receiver, elem->counterBlock.vg.dot12InNormPriorityFrames);
717 putNet64(receiver, elem->counterBlock.vg.dot12InNormPriorityOctets);
718 putNet32(receiver, elem->counterBlock.vg.dot12InIPMErrors);
719 putNet32(receiver, elem->counterBlock.vg.dot12InOversizeFrameErrors);
720 putNet32(receiver, elem->counterBlock.vg.dot12InDataErrors);
721 putNet32(receiver, elem->counterBlock.vg.dot12InNullAddressedFrames);
722 putNet32(receiver, elem->counterBlock.vg.dot12OutHighPriorityFrames);
723 putNet64(receiver, elem->counterBlock.vg.dot12OutHighPriorityOctets);
724 putNet32(receiver, elem->counterBlock.vg.dot12TransitionIntoTrainings);
725 putNet64(receiver, elem->counterBlock.vg.dot12HCInHighPriorityOctets);
726 putNet64(receiver, elem->counterBlock.vg.dot12HCInNormPriorityOctets);
727 putNet64(receiver, elem->counterBlock.vg.dot12HCOutHighPriorityOctets);
728 break;
729 case SFLCOUNTERS_VLAN:
730 // mixed sizes
731 putNet32(receiver, elem->counterBlock.vlan.vlan_id);
732 putNet64(receiver, elem->counterBlock.vlan.octets);
733 putNet32(receiver, elem->counterBlock.vlan.ucastPkts);
734 putNet32(receiver, elem->counterBlock.vlan.multicastPkts);
735 putNet32(receiver, elem->counterBlock.vlan.broadcastPkts);
736 putNet32(receiver, elem->counterBlock.vlan.discards);
737 break;
738 default:
739 sflError(receiver, "unexpected counters_tag");
740 return -1;
741 break;
742 }
743 }
744 }
745 // sanity check
746 assert(((u_char *)receiver->sampleCollector.datap
747 - (u_char *)receiver->sampleCollector.data
748 - receiver->sampleCollector.pktlen) == (u_int32_t)packedSize);
749
750 // update the pktlen
751 receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data;
752 return packedSize;
753}
754
755/*_________________---------------------------------__________________
756 _________________ sfl_receiver_samplePacketsSent __________________
757 -----------------_________________________________------------------
758*/
759
760u_int32_t sfl_receiver_samplePacketsSent(SFLReceiver *receiver)
761{
762 return receiver->sampleCollector.packetSeqNo;
763}
764
765/*_________________---------------------------__________________
766 _________________ sendSample __________________
767 -----------------___________________________------------------
768*/
769
770static void sendSample(SFLReceiver *receiver)
d295e8e9 771{
c72e245a
BP		 772 /* construct and send out the sample, then reset for the next one... */
773 /* first fill in the header with the latest values */
774 /* version, agent_address and sub_agent_id were pre-set. */
775 u_int32_t hdrIdx = (receiver->agent->myIP.type == SFLADDRESSTYPE_IP_V6) ? 7 : 4;
776 receiver->sampleCollector.data[hdrIdx++] = htonl(++receiver->sampleCollector.packetSeqNo); /* seq no */
777 receiver->sampleCollector.data[hdrIdx++] = htonl((receiver->agent->now - receiver->agent->bootTime) * 1000); /* uptime */
778 receiver->sampleCollector.data[hdrIdx++] = htonl(receiver->sampleCollector.numSamples); /* num samples */
779 /* send */
780 if(receiver->agent->sendFn) (*receiver->agent->sendFn)(receiver->agent->magic,
781 receiver->agent,
782 receiver,
d295e8e9 783 (u_char *)receiver->sampleCollector.data,
c72e245a
BP		 784 receiver->sampleCollector.pktlen);
785 else {
786#ifdef SFLOW_DO_SOCKET
787 /* send it myself */
788 if (receiver->sFlowRcvrAddress.type == SFLADDRESSTYPE_IP_V6) {
789 u_int32_t soclen = sizeof(struct sockaddr_in6);
790 int result = sendto(receiver->agent->receiverSocket6,
791 receiver->sampleCollector.data,
792 receiver->sampleCollector.pktlen,
793 0,
794 (struct sockaddr *)&receiver->receiver6,
795 soclen);
796 if(result == -1 && errno != EINTR) sfl_agent_sysError(receiver->agent, "receiver", "IPv6 socket sendto error");
797 if(result == 0) sfl_agent_error(receiver->agent, "receiver", "IPv6 socket sendto returned 0");
798 }
799 else {
800 u_int32_t soclen = sizeof(struct sockaddr_in);
801 int result = sendto(receiver->agent->receiverSocket4,
802 receiver->sampleCollector.data,
803 receiver->sampleCollector.pktlen,
804 0,
805 (struct sockaddr *)&receiver->receiver4,
806 soclen);
807 if(result == -1 && errno != EINTR) sfl_agent_sysError(receiver->agent, "receiver", "socket sendto error");
808 if(result == 0) sfl_agent_error(receiver->agent, "receiver", "socket sendto returned 0");
809 }
810#endif
811 }
812
813 /* reset for the next time */
814 resetSampleCollector(receiver);
815}
816
817/*_________________---------------------------__________________
818 _________________ resetSampleCollector __________________
819 -----------------___________________________------------------
820*/
821
822static void resetSampleCollector(SFLReceiver *receiver)
823{
824 receiver->sampleCollector.pktlen = 0;
825 receiver->sampleCollector.numSamples = 0;
826 /* point the datap to just after the header */
827 receiver->sampleCollector.datap = (receiver->agent->myIP.type == SFLADDRESSTYPE_IP_V6) ?
828 (receiver->sampleCollector.data + 10) : (receiver->sampleCollector.data + 7);
829
830 receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data;
831}
832
833/*_________________---------------------------__________________
834 _________________ sflError __________________
835 -----------------___________________________------------------
836*/
837
838static void sflError(SFLReceiver *receiver, char *msg)
839{
840 sfl_agent_error(receiver->agent, "receiver", msg);
841 resetSampleCollector(receiver);
842}
6506f45c
BP		 843
844#endif /* !__CHECKER__ */
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