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ovs/lib/sflow_receiver.c
Eelco Chaudron f673d0cd5f sflow: Fix check for disabled receive time. 
Changed sFlowRcvrTimeout to a uint32_t to avoid time_t warnings
reported by Coverity. A uint32_t is more than large enough as
this is a (seconds) tick counter and OVS is not even using this.

Fixes: c72e245a0e2c ("Add InMon's sFlow Agent library to the build system.")
Acked-by: Ilya Maximets <i.maximets@ovn.org>
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
2024-06-03 13:23:41 +02:00

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/* Copyright (c) 2002-2009 InMon Corp. Licensed under the terms of either the
* Sun Industry Standards Source License 1.1, that is available at:
* http://host-sflow.sourceforge.net/sissl.html
* or the InMon sFlow License, that is available at:
* http://www.inmon.com/technology/sflowlicense.txt
*/
#ifndef __CHECKER__ /* Don't run sparse on anything in this file. */
#include <assert.h>
#include "sflow_api.h"
static void resetSampleCollector(SFLReceiver *receiver);
static void sendSample(SFLReceiver *receiver);
static void sflError(SFLReceiver *receiver, char *errm);
inline static void putNet32(SFLReceiver *receiver, u_int32_t val);
inline static void putAddress(SFLReceiver *receiver, SFLAddress *addr);
#ifdef SFLOW_DO_SOCKET
static void initSocket(SFLReceiver *receiver);
#endif
/*_________________--------------------------__________________
_________________ sfl_receiver_init __________________
-----------------__________________________------------------
*/
void sfl_receiver_init(SFLReceiver *receiver, SFLAgent *agent)
{
/* first clear everything */
memset(receiver, 0, sizeof(*receiver));
/* now copy in the parameters */
receiver->agent = agent;
/* set defaults */
receiver->sFlowRcvrMaximumDatagramSize = SFL_DEFAULT_DATAGRAM_SIZE;
receiver->sFlowRcvrPort = SFL_DEFAULT_COLLECTOR_PORT;
#ifdef SFLOW_DO_SOCKET
/* initialize the socket address */
initSocket(receiver);
#endif
/* preset some of the header fields */
receiver->sampleCollector.datap = receiver->sampleCollector.data;
putNet32(receiver, SFLDATAGRAM_VERSION5);
putAddress(receiver, &agent->myIP);
putNet32(receiver, agent->subId);
/* prepare to receive the first sample */
resetSampleCollector(receiver);
}
/*_________________---------------------------__________________
_________________ reset __________________
-----------------___________________________------------------
called on timeout, or when owner string is cleared
*/
static void reset(SFLReceiver *receiver) {
// ask agent to tell samplers and pollers to stop sending samples
sfl_agent_resetReceiver(receiver->agent, receiver);
// reinitialize
sfl_receiver_init(receiver, receiver->agent);
}
#ifdef SFLOW_DO_SOCKET
/*_________________---------------------------__________________
_________________ initSocket __________________
-----------------___________________________------------------
*/
static void initSocket(SFLReceiver *receiver) {
if(receiver->sFlowRcvrAddress.type == SFLADDRESSTYPE_IP_V6) {
struct sockaddr_in6 *sa6 = &receiver->receiver6;
sa6->sin6_port = htons((u_int16_t)receiver->sFlowRcvrPort);
sa6->sin6_family = AF_INET6;
sa6->sin6_addr = receiver->sFlowRcvrAddress.address.ip_v6;
}
else {
struct sockaddr_in *sa4 = &receiver->receiver4;
sa4->sin_port = htons((u_int16_t)receiver->sFlowRcvrPort);
sa4->sin_family = AF_INET;
sa4->sin_addr = receiver->sFlowRcvrAddress.address.ip_v4;
}
}
#endif
/*_________________----------------------------------------_____________
_________________ MIB Vars _____________
-----------------________________________________________-------------
*/
char * sfl_receiver_get_sFlowRcvrOwner(SFLReceiver *receiver) {
return receiver->sFlowRcvrOwner;
}
void sfl_receiver_set_sFlowRcvrOwner(SFLReceiver *receiver, char *sFlowRcvrOwner) {
receiver->sFlowRcvrOwner = sFlowRcvrOwner;
if(sFlowRcvrOwner == NULL || sFlowRcvrOwner[0] == '\0') {
// reset condition! owner string was cleared
reset(receiver);
}
}
u_int32_t sfl_receiver_get_sFlowRcvrTimeout(SFLReceiver *receiver) {
return receiver->sFlowRcvrTimeout;
}
void sfl_receiver_set_sFlowRcvrTimeout(SFLReceiver *receiver, u_int32_t sFlowRcvrTimeout) {
receiver->sFlowRcvrTimeout =sFlowRcvrTimeout;
}
u_int32_t sfl_receiver_get_sFlowRcvrMaximumDatagramSize(SFLReceiver *receiver) {
return receiver->sFlowRcvrMaximumDatagramSize;
}
void sfl_receiver_set_sFlowRcvrMaximumDatagramSize(SFLReceiver *receiver, u_int32_t sFlowRcvrMaximumDatagramSize) {
u_int32_t mdz = sFlowRcvrMaximumDatagramSize;
if(mdz < SFL_MIN_DATAGRAM_SIZE) mdz = SFL_MIN_DATAGRAM_SIZE;
receiver->sFlowRcvrMaximumDatagramSize = mdz;
}
SFLAddress *sfl_receiver_get_sFlowRcvrAddress(SFLReceiver *receiver) {
return &receiver->sFlowRcvrAddress;
}
void sfl_receiver_set_sFlowRcvrAddress(SFLReceiver *receiver, SFLAddress *sFlowRcvrAddress) {
if(sFlowRcvrAddress) receiver->sFlowRcvrAddress = *sFlowRcvrAddress; // structure copy
#ifdef SFLOW_DO_SOCKET
initSocket(receiver);
#endif
}
u_int32_t sfl_receiver_get_sFlowRcvrPort(SFLReceiver *receiver) {
return receiver->sFlowRcvrPort;
}
void sfl_receiver_set_sFlowRcvrPort(SFLReceiver *receiver, u_int32_t sFlowRcvrPort) {
receiver->sFlowRcvrPort = sFlowRcvrPort;
// update the socket structure
#ifdef SFLOW_DO_SOCKET
initSocket(receiver);
#endif
}
/*_________________---------------------------__________________
_________________ sfl_receiver_tick __________________
-----------------___________________________------------------
*/
void sfl_receiver_tick(SFLReceiver *receiver)
{
// if there are any samples to send, flush them now
if(receiver->sampleCollector.numSamples > 0) sendSample(receiver);
// check the timeout
if(receiver->sFlowRcvrTimeout
&& receiver->sFlowRcvrTimeout != UINT32_MAX) {
// count down one tick and reset if we reach 0
if(--receiver->sFlowRcvrTimeout == 0) reset(receiver);
}
}
/*_________________-----------------------------__________________
_________________ receiver write utilities __________________
-----------------_____________________________------------------
*/
inline static void put32(SFLReceiver *receiver, u_int32_t val)
{
*receiver->sampleCollector.datap++ = val;
}
inline static void putNet32(SFLReceiver *receiver, u_int32_t val)
{
*receiver->sampleCollector.datap++ = htonl(val);
}
inline static void putNet32_run(SFLReceiver *receiver, void *obj, size_t quads)
{
u_int32_t *from = (u_int32_t *)obj;
while(quads--) putNet32(receiver, *from++);
}
inline static void putNet64(SFLReceiver *receiver, u_int64_t val64)
{
u_int32_t *firstQuadPtr = receiver->sampleCollector.datap;
// first copy the bytes in
memcpy((u_char *)firstQuadPtr, &val64, 8);
if(htonl(1) != 1) {
// swap the bytes, and reverse the quads too
u_int32_t tmp = *receiver->sampleCollector.datap++;
*firstQuadPtr = htonl(*receiver->sampleCollector.datap);
*receiver->sampleCollector.datap++ = htonl(tmp);
}
else receiver->sampleCollector.datap += 2;
}
inline static void put128(SFLReceiver *receiver, u_char *val)
{
memcpy(receiver->sampleCollector.datap, val, 16);
receiver->sampleCollector.datap += 4;
}
inline static void putString(SFLReceiver *receiver, SFLString *s)
{
putNet32(receiver, s->len);
memcpy(receiver->sampleCollector.datap, s->str, s->len);
receiver->sampleCollector.datap += (s->len + 3) / 4; /* pad to 4-byte boundary */
if ((s->len % 4) != 0){
u_int8_t padding = 4 - (s->len % 4);
memset(((u_int8_t*)receiver->sampleCollector.datap)-padding, 0, padding);
}
}
inline static u_int32_t stringEncodingLength(SFLString *s) {
// answer in bytes, so remember to mulitply by 4 after rounding up to nearest 4-byte boundary
return 4 + (((s->len + 3) / 4) * 4);
}
inline static void putAddress(SFLReceiver *receiver, SFLAddress *addr)
{
// encode unspecified addresses as IPV4:0.0.0.0 - or should we flag this as an error?
if(addr->type == 0) {
putNet32(receiver, SFLADDRESSTYPE_IP_V4);
put32(receiver, 0);
}
else {
putNet32(receiver, addr->type);
if(addr->type == SFLADDRESSTYPE_IP_V4) put32(receiver, addr->address.ip_v4.addr);
else put128(receiver, addr->address.ip_v6.addr);
}
}
inline static u_int32_t addressEncodingLength(SFLAddress *addr) {
return (addr->type == SFLADDRESSTYPE_IP_V6) ? 20 : 8; // type + address (unspecified == IPV4)
}
inline static void putMACAddress(SFLReceiver *receiver,
const struct eth_addr mac)
{
memcpy(receiver->sampleCollector.datap, &mac, 6);
receiver->sampleCollector.datap += 2;
}
inline static void putSwitch(SFLReceiver *receiver, SFLExtended_switch *sw)
{
putNet32(receiver, sw->src_vlan);
putNet32(receiver, sw->src_priority);
putNet32(receiver, sw->dst_vlan);
putNet32(receiver, sw->dst_priority);
}
inline static void putRouter(SFLReceiver *receiver, SFLExtended_router *router)
{
putAddress(receiver, &router->nexthop);
putNet32(receiver, router->src_mask);
putNet32(receiver, router->dst_mask);
}
inline static u_int32_t routerEncodingLength(SFLExtended_router *router) {
return addressEncodingLength(&router->nexthop) + 8;
}
inline static void putGateway(SFLReceiver *receiver, SFLExtended_gateway *gw)
{
putAddress(receiver, &gw->nexthop);
putNet32(receiver, gw->as);
putNet32(receiver, gw->src_as);
putNet32(receiver, gw->src_peer_as);
putNet32(receiver, gw->dst_as_path_segments);
{
u_int32_t seg = 0;
for(; seg < gw->dst_as_path_segments; seg++) {
putNet32(receiver, gw->dst_as_path[seg].type);
putNet32(receiver, gw->dst_as_path[seg].length);
putNet32_run(receiver, gw->dst_as_path[seg].as.seq, gw->dst_as_path[seg].length);
}
}
putNet32(receiver, gw->communities_length);
putNet32_run(receiver, gw->communities, gw->communities_length);
putNet32(receiver, gw->localpref);
}
inline static u_int32_t gatewayEncodingLength(SFLExtended_gateway *gw) {
u_int32_t elemSiz = addressEncodingLength(&gw->nexthop);
u_int32_t seg = 0;
elemSiz += 16; // as, src_as, src_peer_as, dst_as_path_segments
for(; seg < gw->dst_as_path_segments; seg++) {
elemSiz += 8; // type, length
elemSiz += 4 * gw->dst_as_path[seg].length; // set/seq bytes
}
elemSiz += 4; // communities_length
elemSiz += 4 * gw->communities_length; // communities
elemSiz += 4; // localpref
return elemSiz;
}
inline static void putUser(SFLReceiver *receiver, SFLExtended_user *user)
{
putNet32(receiver, user->src_charset);
putString(receiver, &user->src_user);
putNet32(receiver, user->dst_charset);
putString(receiver, &user->dst_user);
}
inline static u_int32_t userEncodingLength(SFLExtended_user *user) {
return 4
+ stringEncodingLength(&user->src_user)
+ 4
+ stringEncodingLength(&user->dst_user);
}
inline static void putUrl(SFLReceiver *receiver, SFLExtended_url *url)
{
putNet32(receiver, url->direction);
putString(receiver, &url->url);
putString(receiver, &url->host);
}
inline static u_int32_t urlEncodingLength(SFLExtended_url *url) {
return 4
+ stringEncodingLength(&url->url)
+ stringEncodingLength(&url->host);
}
inline static void putLabelStack(SFLReceiver *receiver, SFLLabelStack *labelStack)
{
putNet32(receiver, labelStack->depth);
putNet32_run(receiver, labelStack->stack, labelStack->depth);
}
inline static u_int32_t labelStackEncodingLength(SFLLabelStack *labelStack) {
return 4 + (4 * labelStack->depth);
}
inline static void putMpls(SFLReceiver *receiver, SFLExtended_mpls *mpls)
{
putAddress(receiver, &mpls->nextHop);
putLabelStack(receiver, &mpls->in_stack);
putLabelStack(receiver, &mpls->out_stack);
}
inline static u_int32_t mplsEncodingLength(SFLExtended_mpls *mpls) {
return addressEncodingLength(&mpls->nextHop)
+ labelStackEncodingLength(&mpls->in_stack)
+ labelStackEncodingLength(&mpls->out_stack);
}
inline static void putNat(SFLReceiver *receiver, SFLExtended_nat *nat)
{
putAddress(receiver, &nat->src);
putAddress(receiver, &nat->dst);
}
inline static u_int32_t natEncodingLength(SFLExtended_nat *nat) {
return addressEncodingLength(&nat->src)
+ addressEncodingLength(&nat->dst);
}
inline static void putMplsTunnel(SFLReceiver *receiver, SFLExtended_mpls_tunnel *tunnel)
{
putString(receiver, &tunnel->tunnel_lsp_name);
putNet32(receiver, tunnel->tunnel_id);
putNet32(receiver, tunnel->tunnel_cos);
}
inline static u_int32_t mplsTunnelEncodingLength(SFLExtended_mpls_tunnel *tunnel) {
return stringEncodingLength(&tunnel->tunnel_lsp_name) + 8;
}
inline static void putMplsVc(SFLReceiver *receiver, SFLExtended_mpls_vc *vc)
{
putString(receiver, &vc->vc_instance_name);
putNet32(receiver, vc->vll_vc_id);
putNet32(receiver, vc->vc_label_cos);
}
inline static u_int32_t mplsVcEncodingLength(SFLExtended_mpls_vc *vc) {
return stringEncodingLength( &vc->vc_instance_name) + 8;
}
inline static void putMplsFtn(SFLReceiver *receiver, SFLExtended_mpls_FTN *ftn)
{
putString(receiver, &ftn->mplsFTNDescr);
putNet32(receiver, ftn->mplsFTNMask);
}
inline static u_int32_t mplsFtnEncodingLength(SFLExtended_mpls_FTN *ftn) {
return stringEncodingLength( &ftn->mplsFTNDescr) + 4;
}
inline static void putMplsLdpFec(SFLReceiver *receiver, SFLExtended_mpls_LDP_FEC *ldpfec)
{
putNet32(receiver, ldpfec->mplsFecAddrPrefixLength);
}
inline static u_int32_t mplsLdpFecEncodingLength(SFLExtended_mpls_LDP_FEC *ldpfec) {
return 4;
}
inline static void putVlanTunnel(SFLReceiver *receiver, SFLExtended_vlan_tunnel *vlanTunnel)
{
putLabelStack(receiver, &vlanTunnel->stack);
}
inline static u_int32_t vlanTunnelEncodingLength(SFLExtended_vlan_tunnel *vlanTunnel) {
return labelStackEncodingLength(&vlanTunnel->stack);
}
inline static void putGenericCounters(SFLReceiver *receiver, SFLIf_counters *counters)
{
putNet32(receiver, counters->ifIndex);
putNet32(receiver, counters->ifType);
putNet64(receiver, counters->ifSpeed);
putNet32(receiver, counters->ifDirection);
putNet32(receiver, counters->ifStatus);
putNet64(receiver, counters->ifInOctets);
putNet32(receiver, counters->ifInUcastPkts);
putNet32(receiver, counters->ifInMulticastPkts);
putNet32(receiver, counters->ifInBroadcastPkts);
putNet32(receiver, counters->ifInDiscards);
putNet32(receiver, counters->ifInErrors);
putNet32(receiver, counters->ifInUnknownProtos);
putNet64(receiver, counters->ifOutOctets);
putNet32(receiver, counters->ifOutUcastPkts);
putNet32(receiver, counters->ifOutMulticastPkts);
putNet32(receiver, counters->ifOutBroadcastPkts);
putNet32(receiver, counters->ifOutDiscards);
putNet32(receiver, counters->ifOutErrors);
putNet32(receiver, counters->ifPromiscuousMode);
}
/*_________________-----------------------------__________________
_________________ computeFlowSampleSize __________________
-----------------_____________________________------------------
*/
static int computeFlowSampleSize(SFLReceiver *receiver, SFL_FLOW_SAMPLE_TYPE *fs)
{
SFLFlow_sample_element *elem = fs->elements;
#ifdef SFL_USE_32BIT_INDEX
u_int siz = 52; /* tag, length, sequence_number, ds_class, ds_index, sampling_rate,
sample_pool, drops, inputFormat, input, outputFormat, output, number of elements */
#else
u_int siz = 40; /* tag, length, sequence_number, source_id, sampling_rate,
sample_pool, drops, input, output, number of elements */
#endif
fs->num_elements = 0; /* we're going to count them again even if this was set by the client */
for(; elem != NULL; elem = elem->nxt) {
u_int elemSiz = 0;
fs->num_elements++;
siz += 8; /* tag, length */
switch(elem->tag) {
case SFLFLOW_HEADER:
elemSiz = 16; /* header_protocol, frame_length, stripped, header_length */
elemSiz += ((elem->flowType.header.header_length + 3) / 4) * 4; /* header, rounded up to nearest 4 bytes */
break;
case SFLFLOW_ETHERNET: elemSiz = sizeof(SFLSampled_ethernet); break;
case SFLFLOW_IPV4: elemSiz = sizeof(SFLSampled_ipv4); break;
case SFLFLOW_IPV6: elemSiz = sizeof(SFLSampled_ipv6); break;
case SFLFLOW_EX_SWITCH: elemSiz = sizeof(SFLExtended_switch); break;
case SFLFLOW_EX_ROUTER: elemSiz = routerEncodingLength(&elem->flowType.router); break;
case SFLFLOW_EX_GATEWAY: elemSiz = gatewayEncodingLength(&elem->flowType.gateway); break;
case SFLFLOW_EX_USER: elemSiz = userEncodingLength(&elem->flowType.user); break;
case SFLFLOW_EX_URL: elemSiz = urlEncodingLength(&elem->flowType.url); break;
case SFLFLOW_EX_MPLS: elemSiz = mplsEncodingLength(&elem->flowType.mpls); break;
case SFLFLOW_EX_NAT: elemSiz = natEncodingLength(&elem->flowType.nat); break;
case SFLFLOW_EX_MPLS_TUNNEL: elemSiz = mplsTunnelEncodingLength(&elem->flowType.mpls_tunnel); break;
case SFLFLOW_EX_MPLS_VC: elemSiz = mplsVcEncodingLength(&elem->flowType.mpls_vc); break;
case SFLFLOW_EX_MPLS_FTN: elemSiz = mplsFtnEncodingLength(&elem->flowType.mpls_ftn); break;
case SFLFLOW_EX_MPLS_LDP_FEC: elemSiz = mplsLdpFecEncodingLength(&elem->flowType.mpls_ldp_fec); break;
case SFLFLOW_EX_VLAN_TUNNEL: elemSiz = vlanTunnelEncodingLength(&elem->flowType.vlan_tunnel); break;
case SFLFLOW_EX_IPV4_TUNNEL_EGRESS:
case SFLFLOW_EX_IPV4_TUNNEL_INGRESS:
elemSiz = sizeof(SFLSampled_ipv4);
break;
case SFLFLOW_EX_VNI_EGRESS:
case SFLFLOW_EX_VNI_INGRESS:
elemSiz = sizeof(SFLExtended_vni);
break;
default:
sflError(receiver, "unexpected packet_data_tag");
return -1;
break;
}
// cache the element size, and accumulate it into the overall FlowSample size
elem->length = elemSiz;
siz += elemSiz;
}
return siz;
}
/*_________________-------------------------------__________________
_________________ sfl_receiver_writeFlowSample __________________
-----------------_______________________________------------------
*/
int sfl_receiver_writeFlowSample(SFLReceiver *receiver, SFL_FLOW_SAMPLE_TYPE *fs)
{
int packedSize;
if(fs == NULL) return -1;
if((packedSize = computeFlowSampleSize(receiver, fs)) == -1) return -1;
// check in case this one sample alone is too big for the datagram
// in fact - if it is even half as big then we should ditch it. Very
// important to avoid overruning the packet buffer.
if(packedSize > (int)(receiver->sFlowRcvrMaximumDatagramSize / 2)) {
sflError(receiver, "flow sample too big for datagram");
return -1;
}
// if the sample pkt is full enough so that this sample might put
// it over the limit, then we should send it now before going on.
if((receiver->sampleCollector.pktlen + packedSize) >= receiver->sFlowRcvrMaximumDatagramSize)
sendSample(receiver);
receiver->sampleCollector.numSamples++;
#ifdef SFL_USE_32BIT_INDEX
putNet32(receiver, SFLFLOW_SAMPLE_EXPANDED);
#else
putNet32(receiver, SFLFLOW_SAMPLE);
#endif
putNet32(receiver, packedSize - 8); // don't include tag and len
putNet32(receiver, fs->sequence_number);
#ifdef SFL_USE_32BIT_INDEX
putNet32(receiver, fs->ds_class);
putNet32(receiver, fs->ds_index);
#else
putNet32(receiver, fs->source_id);
#endif
putNet32(receiver, fs->sampling_rate);
putNet32(receiver, fs->sample_pool);
putNet32(receiver, fs->drops);
#ifdef SFL_USE_32BIT_INDEX
putNet32(receiver, fs->inputFormat);
putNet32(receiver, fs->input);
putNet32(receiver, fs->outputFormat);
putNet32(receiver, fs->output);
#else
putNet32(receiver, fs->input);
putNet32(receiver, fs->output);
#endif
putNet32(receiver, fs->num_elements);
{
SFLFlow_sample_element *elem = fs->elements;
for(; elem != NULL; elem = elem->nxt) {
putNet32(receiver, elem->tag);
putNet32(receiver, elem->length); // length cached in computeFlowSampleSize()
switch(elem->tag) {
case SFLFLOW_HEADER:
putNet32(receiver, elem->flowType.header.header_protocol);
putNet32(receiver, elem->flowType.header.frame_length);
putNet32(receiver, elem->flowType.header.stripped);
putNet32(receiver, elem->flowType.header.header_length);
/* the header */
memcpy(receiver->sampleCollector.datap, elem->flowType.header.header_bytes, elem->flowType.header.header_length);
/* round up to multiple of 4 to preserve alignment */
receiver->sampleCollector.datap += ((elem->flowType.header.header_length + 3) / 4);
break;
case SFLFLOW_ETHERNET:
putNet32(receiver, elem->flowType.ethernet.eth_len);
putMACAddress(receiver, elem->flowType.ethernet.src_mac);
putMACAddress(receiver, elem->flowType.ethernet.dst_mac);
putNet32(receiver, elem->flowType.ethernet.eth_type);
break;
case SFLFLOW_IPV4:
case SFLFLOW_EX_IPV4_TUNNEL_EGRESS:
case SFLFLOW_EX_IPV4_TUNNEL_INGRESS:
putNet32(receiver, elem->flowType.ipv4.length);
putNet32(receiver, elem->flowType.ipv4.protocol);
put32(receiver, elem->flowType.ipv4.src_ip.addr);
put32(receiver, elem->flowType.ipv4.dst_ip.addr);
putNet32(receiver, elem->flowType.ipv4.src_port);
putNet32(receiver, elem->flowType.ipv4.dst_port);
putNet32(receiver, elem->flowType.ipv4.tcp_flags);
putNet32(receiver, elem->flowType.ipv4.tos);
break;
case SFLFLOW_IPV6:
putNet32(receiver, elem->flowType.ipv6.length);
putNet32(receiver, elem->flowType.ipv6.protocol);
put128(receiver, elem->flowType.ipv6.src_ip.addr);
put128(receiver, elem->flowType.ipv6.dst_ip.addr);
putNet32(receiver, elem->flowType.ipv6.src_port);
putNet32(receiver, elem->flowType.ipv6.dst_port);
putNet32(receiver, elem->flowType.ipv6.tcp_flags);
putNet32(receiver, elem->flowType.ipv6.priority);
break;
case SFLFLOW_EX_SWITCH: putSwitch(receiver, &elem->flowType.sw); break;
case SFLFLOW_EX_ROUTER: putRouter(receiver, &elem->flowType.router); break;
case SFLFLOW_EX_GATEWAY: putGateway(receiver, &elem->flowType.gateway); break;
case SFLFLOW_EX_USER: putUser(receiver, &elem->flowType.user); break;
case SFLFLOW_EX_URL: putUrl(receiver, &elem->flowType.url); break;
case SFLFLOW_EX_MPLS: putMpls(receiver, &elem->flowType.mpls); break;
case SFLFLOW_EX_NAT: putNat(receiver, &elem->flowType.nat); break;
case SFLFLOW_EX_MPLS_TUNNEL: putMplsTunnel(receiver, &elem->flowType.mpls_tunnel); break;
case SFLFLOW_EX_MPLS_VC: putMplsVc(receiver, &elem->flowType.mpls_vc); break;
case SFLFLOW_EX_MPLS_FTN: putMplsFtn(receiver, &elem->flowType.mpls_ftn); break;
case SFLFLOW_EX_MPLS_LDP_FEC: putMplsLdpFec(receiver, &elem->flowType.mpls_ldp_fec); break;
case SFLFLOW_EX_VLAN_TUNNEL: putVlanTunnel(receiver, &elem->flowType.vlan_tunnel); break;
case SFLFLOW_EX_VNI_EGRESS:
case SFLFLOW_EX_VNI_INGRESS:
putNet32(receiver, elem->flowType.tunnel_vni.vni);
break;
default:
sflError(receiver, "unexpected packet_data_tag");
return -1;
break;
}
}
}
// sanity check
assert(((u_char *)receiver->sampleCollector.datap
- (u_char *)receiver->sampleCollector.data
- receiver->sampleCollector.pktlen) == (u_int32_t)packedSize);
// update the pktlen
receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data;
return packedSize;
}
/*_________________-----------------------------__________________
_________________ computeCountersSampleSize __________________
-----------------_____________________________------------------
*/
static int computeCountersSampleSize(SFLReceiver *receiver, SFL_COUNTERS_SAMPLE_TYPE *cs)
{
SFLCounters_sample_element *elem = cs->elements;
#ifdef SFL_USE_32BIT_INDEX
u_int siz = 24; /* tag, length, sequence_number, ds_class, ds_index, number of elements */
#else
u_int siz = 20; /* tag, length, sequence_number, source_id, number of elements */
#endif
cs->num_elements = 0; /* we're going to count them again even if this was set by the client */
for(; elem != NULL; elem = elem->nxt) {
u_int elemSiz = 0;
cs->num_elements++;
siz += 8; /* tag, length */
switch(elem->tag) {
case SFLCOUNTERS_GENERIC: elemSiz = SFL_CTR_GENERIC_XDR_SIZE; break;
case SFLCOUNTERS_ETHERNET: elemSiz = SFL_CTR_ETHERNET_XDR_SIZE; break;
case SFLCOUNTERS_TOKENRING: elemSiz = sizeof(elem->counterBlock.tokenring); break;
case SFLCOUNTERS_VG: elemSiz = sizeof(elem->counterBlock.vg); break;
case SFLCOUNTERS_VLAN: elemSiz = sizeof(elem->counterBlock.vlan); break;
case SFLCOUNTERS_LACP: elemSiz = SFL_CTR_LACP_XDR_SIZE; break;
case SFLCOUNTERS_OPENFLOWPORT: elemSiz = SFL_CTR_OPENFLOWPORT_XDR_SIZE; break;
case SFLCOUNTERS_PORTNAME: elemSiz = stringEncodingLength(&elem->counterBlock.portName.portName); break;
case SFLCOUNTERS_APP_RESOURCES: elemSiz = SFL_CTR_APP_RESOURCES_XDR_SIZE; break;
case SFLCOUNTERS_OVSDP: elemSiz = SFL_CTR_OVSDP_XDR_SIZE; break;
default:
sflError(receiver, "unexpected counters_tag");
return -1;
break;
}
// cache the element size, and accumulate it into the overall FlowSample size
elem->length = elemSiz;
siz += elemSiz;
}
return siz;
}
/*_________________----------------------------------__________________
_________________ sfl_receiver_writeCountersSample __________________
-----------------__________________________________------------------
*/
int sfl_receiver_writeCountersSample(SFLReceiver *receiver, SFL_COUNTERS_SAMPLE_TYPE *cs)
{
int packedSize;
if(cs == NULL) return -1;
// if the sample pkt is full enough so that this sample might put
// it over the limit, then we should send it now.
if((packedSize = computeCountersSampleSize(receiver, cs)) == -1) return -1;
// check in case this one sample alone is too big for the datagram
// in fact - if it is even half as big then we should ditch it. Very
// important to avoid overruning the packet buffer.
if(packedSize > (int)(receiver->sFlowRcvrMaximumDatagramSize / 2)) {
sflError(receiver, "counters sample too big for datagram");
return -1;
}
if((receiver->sampleCollector.pktlen + packedSize) >= receiver->sFlowRcvrMaximumDatagramSize)
sendSample(receiver);
receiver->sampleCollector.numSamples++;
#ifdef SFL_USE_32BIT_INDEX
putNet32(receiver, SFLCOUNTERS_SAMPLE_EXPANDED);
#else
putNet32(receiver, SFLCOUNTERS_SAMPLE);
#endif
putNet32(receiver, packedSize - 8); // tag and length not included
putNet32(receiver, cs->sequence_number);
#ifdef SFL_USE_32BIT_INDEX
putNet32(receiver, cs->ds_class);
putNet32(receiver, cs->ds_index);
#else
putNet32(receiver, cs->source_id);
#endif
putNet32(receiver, cs->num_elements);
{
SFLCounters_sample_element *elem = cs->elements;
for(; elem != NULL; elem = elem->nxt) {
putNet32(receiver, elem->tag);
putNet32(receiver, elem->length); // length cached in computeCountersSampleSize()
switch(elem->tag) {
case SFLCOUNTERS_GENERIC:
putGenericCounters(receiver, &(elem->counterBlock.generic));
break;
case SFLCOUNTERS_ETHERNET:
// all these counters are 32-bit
putNet32_run(receiver, &elem->counterBlock.ethernet, sizeof(elem->counterBlock.ethernet) / 4);
break;
case SFLCOUNTERS_TOKENRING:
// all these counters are 32-bit
putNet32_run(receiver, &elem->counterBlock.tokenring, sizeof(elem->counterBlock.tokenring) / 4);
break;
case SFLCOUNTERS_VG:
// mixed sizes
putNet32(receiver, elem->counterBlock.vg.dot12InHighPriorityFrames);
putNet64(receiver, elem->counterBlock.vg.dot12InHighPriorityOctets);
putNet32(receiver, elem->counterBlock.vg.dot12InNormPriorityFrames);
putNet64(receiver, elem->counterBlock.vg.dot12InNormPriorityOctets);
putNet32(receiver, elem->counterBlock.vg.dot12InIPMErrors);
putNet32(receiver, elem->counterBlock.vg.dot12InOversizeFrameErrors);
putNet32(receiver, elem->counterBlock.vg.dot12InDataErrors);
putNet32(receiver, elem->counterBlock.vg.dot12InNullAddressedFrames);
putNet32(receiver, elem->counterBlock.vg.dot12OutHighPriorityFrames);
putNet64(receiver, elem->counterBlock.vg.dot12OutHighPriorityOctets);
putNet32(receiver, elem->counterBlock.vg.dot12TransitionIntoTrainings);
putNet64(receiver, elem->counterBlock.vg.dot12HCInHighPriorityOctets);
putNet64(receiver, elem->counterBlock.vg.dot12HCInNormPriorityOctets);
putNet64(receiver, elem->counterBlock.vg.dot12HCOutHighPriorityOctets);
break;
case SFLCOUNTERS_VLAN:
// mixed sizes
putNet32(receiver, elem->counterBlock.vlan.vlan_id);
putNet64(receiver, elem->counterBlock.vlan.octets);
putNet32(receiver, elem->counterBlock.vlan.ucastPkts);
putNet32(receiver, elem->counterBlock.vlan.multicastPkts);
putNet32(receiver, elem->counterBlock.vlan.broadcastPkts);
putNet32(receiver, elem->counterBlock.vlan.discards);
break;
case SFLCOUNTERS_LACP:
putMACAddress(receiver, elem->counterBlock.lacp.actorSystemID);
putMACAddress(receiver, elem->counterBlock.lacp.partnerSystemID);
putNet32(receiver, elem->counterBlock.lacp.attachedAggID);
put32(receiver, elem->counterBlock.lacp.portState.all);
putNet32(receiver, elem->counterBlock.lacp.LACPDUsRx);
putNet32(receiver, elem->counterBlock.lacp.markerPDUsRx);
putNet32(receiver, elem->counterBlock.lacp.markerResponsePDUsRx);
putNet32(receiver, elem->counterBlock.lacp.unknownRx);
putNet32(receiver, elem->counterBlock.lacp.illegalRx);
putNet32(receiver, elem->counterBlock.lacp.LACPDUsTx);
putNet32(receiver, elem->counterBlock.lacp.markerPDUsTx);
putNet32(receiver, elem->counterBlock.lacp.markerResponsePDUsTx);
break;
case SFLCOUNTERS_OPENFLOWPORT:
putNet64(receiver, elem->counterBlock.ofPort.datapath_id);
putNet32(receiver, elem->counterBlock.ofPort.port_no);
break;
case SFLCOUNTERS_PORTNAME:
putString(receiver, &elem->counterBlock.portName.portName);
break;
case SFLCOUNTERS_APP_RESOURCES:
putNet32(receiver, elem->counterBlock.appResources.user_time);
putNet32(receiver, elem->counterBlock.appResources.system_time);
putNet64(receiver, elem->counterBlock.appResources.mem_used);
putNet64(receiver, elem->counterBlock.appResources.mem_max);
putNet32(receiver, elem->counterBlock.appResources.fd_open);
putNet32(receiver, elem->counterBlock.appResources.fd_max);
putNet32(receiver, elem->counterBlock.appResources.conn_open);
putNet32(receiver, elem->counterBlock.appResources.conn_max);
break;
case SFLCOUNTERS_OVSDP:
putNet32(receiver, elem->counterBlock.ovsdp.n_hit);
putNet32(receiver, elem->counterBlock.ovsdp.n_missed);
putNet32(receiver, elem->counterBlock.ovsdp.n_lost);
putNet32(receiver, elem->counterBlock.ovsdp.n_mask_hit);
putNet32(receiver, elem->counterBlock.ovsdp.n_flows);
putNet32(receiver, elem->counterBlock.ovsdp.n_masks);
break;
default:
sflError(receiver, "unexpected counters_tag");
return -1;
break;
}
}
}
// sanity check
assert(((u_char *)receiver->sampleCollector.datap
- (u_char *)receiver->sampleCollector.data
- receiver->sampleCollector.pktlen) == (u_int32_t)packedSize);
// update the pktlen
receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data;
return packedSize;
}
/*_________________---------------------------------__________________
_________________ sfl_receiver_samplePacketsSent __________________
-----------------_________________________________------------------
*/
u_int32_t sfl_receiver_samplePacketsSent(SFLReceiver *receiver)
{
return receiver->sampleCollector.packetSeqNo;
}
/*_________________---------------------------__________________
_________________ sendSample __________________
-----------------___________________________------------------
*/
static void sendSample(SFLReceiver *receiver)
{
/* construct and send out the sample, then reset for the next one... */
/* first fill in the header with the latest values */
/* version, agent_address and sub_agent_id were pre-set. */
u_int32_t hdrIdx = (receiver->agent->myIP.type == SFLADDRESSTYPE_IP_V6) ? 7 : 4;
receiver->sampleCollector.data[hdrIdx++] = htonl(++receiver->sampleCollector.packetSeqNo); /* seq no */
receiver->sampleCollector.data[hdrIdx++] = htonl((receiver->agent->now - receiver->agent->bootTime) * 1000); /* uptime */
receiver->sampleCollector.data[hdrIdx++] = htonl(receiver->sampleCollector.numSamples); /* num samples */
/* send */
if(receiver->agent->sendFn) (*receiver->agent->sendFn)(receiver->agent->magic,
receiver->agent,
receiver,
(u_char *)receiver->sampleCollector.data,
receiver->sampleCollector.pktlen);
else {
#ifdef SFLOW_DO_SOCKET
/* send it myself */
if (receiver->sFlowRcvrAddress.type == SFLADDRESSTYPE_IP_V6) {
u_int32_t soclen = sizeof(struct sockaddr_in6);
int result = sendto(receiver->agent->receiverSocket6,
receiver->sampleCollector.data,
receiver->sampleCollector.pktlen,
0,
(struct sockaddr *)&receiver->receiver6,
soclen);
if(result == -1 && errno != EINTR) sfl_agent_sysError(receiver->agent, "receiver", "IPv6 socket sendto error");
if(result == 0) sfl_agent_error(receiver->agent, "receiver", "IPv6 socket sendto returned 0");
}
else {
u_int32_t soclen = sizeof(struct sockaddr_in);
int result = sendto(receiver->agent->receiverSocket4,
receiver->sampleCollector.data,
receiver->sampleCollector.pktlen,
0,
(struct sockaddr *)&receiver->receiver4,
soclen);
if(result == -1 && errno != EINTR) sfl_agent_sysError(receiver->agent, "receiver", "socket sendto error");
if(result == 0) sfl_agent_error(receiver->agent, "receiver", "socket sendto returned 0");
}
#endif
}
/* reset for the next time */
resetSampleCollector(receiver);
}
/*_________________---------------------------__________________
_________________ resetSampleCollector __________________
-----------------___________________________------------------
*/
static void resetSampleCollector(SFLReceiver *receiver)
{
receiver->sampleCollector.pktlen = 0;
receiver->sampleCollector.numSamples = 0;
/* point the datap to just after the header */
receiver->sampleCollector.datap = (receiver->agent->myIP.type == SFLADDRESSTYPE_IP_V6) ?
(receiver->sampleCollector.data + 10) : (receiver->sampleCollector.data + 7);
receiver->sampleCollector.pktlen = (u_char *)receiver->sampleCollector.datap - (u_char *)receiver->sampleCollector.data;
}
/*_________________---------------------------__________________
_________________ sflError __________________
-----------------___________________________------------------
*/
static void sflError(SFLReceiver *receiver, char *msg)
{
sfl_agent_error(receiver->agent, "receiver", msg);
resetSampleCollector(receiver);
}
#endif /* !__CHECKER__ */
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