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/*
* Copyright (c) 2009, The Regents of the University of California, through
* Lawrence Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
*/
/* iperf_udp.c: UDP specific routines for iperf
*
* NOTE: not yet finished / working
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <assert.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <pthread.h>
#include <stdint.h>
#include <netinet/tcp.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sched.h>
#include <signal.h>
#include <setjmp.h>
#include "iperf.h"
#include "iperf_api.h"
#include "iperf_udp.h"
#include "timer.h"
#include "net.h"
#include "locale.h"
/**************************************************************************/
/**
* iperf_udp_recv -- receives the client data for UDP
*
*returns state of packet received
*
*/
int
iperf_udp_recv(struct iperf_stream *sp)
{
int result;
int size = sp->settings->blksize;
int sec, usec, pcount;
double transit = 0, d = 0;
struct timeval sent_time, arrival_time;
#ifdef USE_SEND
do {
result = recv(sp->socket, sp->buffer, size, 0);
} while (result == -1 && errno == EINTR);
#else
result = Nread(sp->socket, sp->buffer, size, Pudp);
#endif
if (result < 0) {
perror("Nread udp result");
return (-1);
}
sp->result->bytes_received += result;
sp->result->bytes_received_this_interval += result;
memcpy(&sec, sp->buffer, sizeof(sec));
memcpy(&usec, sp->buffer+4, sizeof(usec));
memcpy(&pcount, sp->buffer+8, sizeof(pcount));
sec = ntohl(sec);
usec = ntohl(usec);
pcount = ntohl(pcount);
sent_time.tv_sec = sec;
sent_time.tv_usec = usec;
/* Out of order packets */
if (pcount >= sp->packet_count + 1) {
if (pcount > sp->packet_count + 1) {
sp->cnt_error += (pcount - 1) - sp->packet_count;
}
sp->packet_count = pcount;
} else {
sp->outoforder_packets++;
printf("OUT OF ORDER - incoming packet = %d and received packet = %d AND SP = %d\n", pcount, sp->packet_count, sp->socket);
}
/* jitter measurement */
if (gettimeofday(&arrival_time, NULL) < 0) {
perror("gettimeofday");
}
transit = timeval_diff(&sent_time, &arrival_time);
d = transit - sp->prev_transit;
if (d < 0)
d = -d;
sp->prev_transit = transit;
// XXX: This is NOT the way to calculate jitter
// J = |(R1 - S1) - (R0 - S0)| [/ number of packets, for average]
sp->jitter += (d - sp->jitter) / 16.0;
return result;
}
/**************************************************************************/
int
iperf_udp_send(struct iperf_stream *sp)
{
ssize_t result = 0;
int64_t dtargus;
int64_t adjustus = 0;
uint64_t sec, usec, pcount;
int size = sp->settings->blksize;
struct timeval before, after;
if (timer_expired(sp->send_timer)) {
dtargus = (int64_t) (sp->settings->blksize) * SEC_TO_US * 8;
dtargus /= sp->settings->rate;
assert(dtargus != 0);
if (gettimeofday(&before, 0) < 0)
perror("gettimeofday");
++sp->packet_count;
sec = htonl(before.tv_sec);
usec = htonl(before.tv_usec);
pcount = htonl(sp->packet_count);
memcpy(sp->buffer, &sec, sizeof(sec));
memcpy(sp->buffer+4, &usec, sizeof(usec));
memcpy(sp->buffer+8, &pcount, sizeof(pcount));
#ifdef USE_SEND
result = send(sp->socket, sp->buffer, size, 0);
#else
result = Nwrite(sp->socket, sp->buffer, size, Pudp);
#endif
if (result < 0)
perror("Nwrite udp error");
sp->result->bytes_sent += result;
sp->result->bytes_sent_this_interval += result;
if (gettimeofday(&after, 0) < 0)
perror("gettimeofday");
adjustus = dtargus;
adjustus += (before.tv_sec - after.tv_sec) * SEC_TO_US;
adjustus += (before.tv_usec - after.tv_usec);
if (adjustus > 0) {
dtargus = adjustus;
}
update_timer(sp->send_timer, 0, dtargus);
}
return result;
}
/**************************************************************************/
struct iperf_stream *
iperf_new_udp_stream(struct iperf_test * testp)
{
struct iperf_stream *sp;
sp = (struct iperf_stream *) iperf_new_stream(testp);
if (!sp) {
perror("malloc");
return (NULL);
}
sp->rcv = iperf_udp_recv;
sp->snd = iperf_udp_send;
return sp;
}
/**************************************************************************/
/**
* iperf_udp_accept -- accepts a new UDP connection
* on udp_listener_socket
*returns 0 on success
*
*/
int
iperf_udp_accept(struct iperf_test *test)
{
struct iperf_stream *sp;
struct sockaddr_in sa_peer;
int buf;
socklen_t len;
int sz, s;
s = test->listener_udp;
len = sizeof sa_peer;
if ((sz = recvfrom(test->listener_udp, &buf, sizeof(buf), 0, (struct sockaddr *) &sa_peer, &len)) < 0) {
perror("recvfrom in udp accept");
return (-1);
}
if (connect(s, (struct sockaddr *) &sa_peer, len) < 0) {
perror("iperf_udp_accept: connect error");
return -1;
}
sp = test->new_stream(test);
if (!sp)
return (-1);
sp->socket = s;
iperf_init_stream(sp, test);
iperf_add_stream(test, sp);
FD_SET(s, &test->read_set);
FD_SET(s, &test->write_set);
test->max_fd = (s > test->max_fd) ? s : test->max_fd;
test->listener_udp = netannounce(Pudp, NULL, test->server_port);
if (test->listener_udp < 0)
return -1;
FD_SET(test->listener_udp, &test->read_set);
test->max_fd = (test->max_fd < test->listener_udp) ? test->listener_udp : test->max_fd;
/* Let the client know we're ready "accept" another UDP "stream" */
if (write(sp->socket, &buf, sizeof(buf)) < 0) {
perror("write listen message");
return -1;
}
connect_msg(sp);
test->streams_accepted++;
return 0;
}
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