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/*
Itay Marom
Cisco Systems, Inc.
*/
/*
Copyright (c) 2016-2016 Cisco Systems, Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "bp_sim.h"
#include "trex_stateless_rx_port_mngr.h"
#include "common/captureFile.h"
#include "trex_stateless_rx_core.h"
/************************** latency feature ************/
void RXLatency::handle_pkt(const rte_mbuf_t *m) {
CFlowStatParser parser;
if (m_rcv_all || parser.parse(rte_pktmbuf_mtod(m, uint8_t *), m->pkt_len) == 0) {
uint32_t ip_id;
if (m_rcv_all || (parser.get_ip_id(ip_id) == 0)) {
if (m_rcv_all || is_flow_stat_id(ip_id)) {
uint16_t hw_id;
if (m_rcv_all || is_flow_stat_payload_id(ip_id)) {
bool good_packet = true;
uint8_t *p = rte_pktmbuf_mtod(m, uint8_t*);
struct flow_stat_payload_header *fsp_head = (struct flow_stat_payload_header *)
(p + m->pkt_len - sizeof(struct flow_stat_payload_header));
hw_id = fsp_head->hw_id;
CRFC2544Info *curr_rfc2544;
if (unlikely(fsp_head->magic != FLOW_STAT_PAYLOAD_MAGIC) || hw_id >= MAX_FLOW_STATS_PAYLOAD) {
good_packet = false;
if (!m_rcv_all)
m_err_cntrs->m_bad_header++;
} else {
curr_rfc2544 = &m_rfc2544[hw_id];
if (fsp_head->flow_seq != curr_rfc2544->get_exp_flow_seq()) {
// bad flow seq num
// Might be the first packet of a new flow, packet from an old flow, or garbage.
if (fsp_head->flow_seq == curr_rfc2544->get_prev_flow_seq()) {
// packet from previous flow using this hw_id that arrived late
good_packet = false;
m_err_cntrs->m_old_flow++;
} else {
if (curr_rfc2544->no_flow_seq()) {
// first packet we see from this flow
good_packet = true;
curr_rfc2544->set_exp_flow_seq(fsp_head->flow_seq);
} else {
// garbage packet
good_packet = false;
m_err_cntrs->m_bad_header++;
}
}
}
}
if (good_packet) {
uint32_t pkt_seq = fsp_head->seq;
uint32_t exp_seq = curr_rfc2544->get_seq();
if (unlikely(pkt_seq != exp_seq)) {
if (pkt_seq < exp_seq) {
if (exp_seq - pkt_seq > 100000) {
// packet loss while we had wrap around
curr_rfc2544->inc_seq_err(pkt_seq - exp_seq);
curr_rfc2544->inc_seq_err_too_big();
curr_rfc2544->set_seq(pkt_seq + 1);
} else {
if (pkt_seq == (exp_seq - 1)) {
curr_rfc2544->inc_dup();
} else {
curr_rfc2544->inc_ooo();
// We thought it was lost, but it was just out of order
curr_rfc2544->dec_seq_err();
}
curr_rfc2544->inc_seq_err_too_low();
}
} else {
if (unlikely (pkt_seq - exp_seq > 100000)) {
// packet reorder while we had wrap around
if (pkt_seq == (exp_seq - 1)) {
curr_rfc2544->inc_dup();
} else {
curr_rfc2544->inc_ooo();
// We thought it was lost, but it was just out of order
curr_rfc2544->dec_seq_err();
}
curr_rfc2544->inc_seq_err_too_low();
} else {
// seq > curr_rfc2544->seq. Assuming lost packets
curr_rfc2544->inc_seq_err(pkt_seq - exp_seq);
curr_rfc2544->inc_seq_err_too_big();
curr_rfc2544->set_seq(pkt_seq + 1);
}
}
} else {
curr_rfc2544->set_seq(pkt_seq + 1);
}
m_rx_pg_stat_payload[hw_id].add_pkts(1);
m_rx_pg_stat_payload[hw_id].add_bytes(m->pkt_len + 4); // +4 for ethernet CRC
uint64_t d = (os_get_hr_tick_64() - fsp_head->time_stamp );
dsec_t ctime = ptime_convert_hr_dsec(d);
curr_rfc2544->add_sample(ctime);
}
} else {
hw_id = get_hw_id(ip_id);
if (hw_id < MAX_FLOW_STATS) {
m_rx_pg_stat[hw_id].add_pkts(1);
m_rx_pg_stat[hw_id].add_bytes(m->pkt_len + 4); // +4 for ethernet CRC
}
}
}
}
}
}
void
RXLatency::reset_stats() {
for (int hw_id = 0; hw_id < MAX_FLOW_STATS; hw_id++) {
m_rx_pg_stat[hw_id].clear();
}
}
/****************************** packet recorder ****************************/
RXPacketRecorder::RXPacketRecorder() {
m_writer = NULL;
m_limit = 0;
m_epoch = -1;
}
RXPacketRecorder::~RXPacketRecorder() {
stop();
}
void
RXPacketRecorder::start(const std::string &pcap, uint32_t limit) {
m_writer = CCapWriterFactory::CreateWriter(LIBPCAP, (char *)pcap.c_str());
if (m_writer == NULL) {
std::stringstream ss;
ss << "unable to create PCAP file: " << pcap;
throw TrexException(ss.str());
}
assert(limit > 0);
m_limit = limit;
}
void
RXPacketRecorder::stop() {
if (m_writer) {
delete m_writer;
m_writer = NULL;
}
}
void
RXPacketRecorder::handle_pkt(const rte_mbuf_t *m) {
if (!m_writer) {
return;
}
dsec_t now = now_sec();
if (m_epoch < 0) {
m_epoch = now;
}
dsec_t dt = now - m_epoch;
CPktNsecTimeStamp t_c(dt);
m_pkt.time_nsec = t_c.m_time_nsec;
m_pkt.time_sec = t_c.m_time_sec;
const uint8_t *p = rte_pktmbuf_mtod(m, uint8_t *);
m_pkt.pkt_len = m->pkt_len;
memcpy(m_pkt.raw, p, m->pkt_len);
m_writer->write_packet(&m_pkt);
m_limit--;
if (m_limit == 0) {
stop();
}
}
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