244 lines
7.7 KiB
C
244 lines
7.7 KiB
C
/*
|
|
* Initial commit by Yibo @ Jul. 28, 2015
|
|
* Last update by Yanzi @ Sept. 28, 2016
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <arpa/inet.h>
|
|
#include <linux/if_packet.h>
|
|
#include <stdlib.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/stat.h>
|
|
#include <net/if.h>
|
|
#include <netinet/ether.h>
|
|
#include <sys/sendfile.h>
|
|
#include <errno.h>
|
|
#include <sys/time.h>
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <ctype.h>
|
|
#include <signal.h>
|
|
|
|
#define BUF_SIZ 65536
|
|
|
|
char isNumber(char number[])
|
|
{
|
|
int i = 0;
|
|
|
|
//checking for negative numbers
|
|
if (number[0] == '-')
|
|
i = 1;
|
|
for (; number[i] != 0; i++)
|
|
{
|
|
//if (number[i] > '9' || number[i] < '0')
|
|
if (!isdigit(number[i]))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
// defaults
|
|
uint slotLength = 10000; // in microseconds, for bandwidth control
|
|
uint quota = 1000000000; // default bytes per slot, default 1GB/slot
|
|
uint sentInSlot = 0, slot = 1;
|
|
uint total_bytes_sent = 0;
|
|
// for timing
|
|
double elapsedTime;
|
|
struct timeval t_start, t_end, t_now;
|
|
// for socket
|
|
int fd; // file descriptor of file to send
|
|
int listenfd; // socket
|
|
char sendbuf[BUF_SIZ];
|
|
struct sockaddr_in servaddr, cliaddr;
|
|
socklen_t clilen;
|
|
// for misc
|
|
int ret;
|
|
int sendsize = 1460; // 1500 MTU - 20 IPv4 - 20 TCP
|
|
uint bytes2send = 0;
|
|
struct stat st;
|
|
unsigned char listenOnce = 0;
|
|
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
if (argc < 3)
|
|
{
|
|
printf("Usage: %s <port> <bytes2send/file2send> <[optional] bandwidth (bps)> <[optional] listenOnce ([0]/1)> <[optional] sendsize (bytes)>\n", argv[0]);
|
|
exit(0);
|
|
}
|
|
|
|
// set bandwidth
|
|
if (argc > 3)
|
|
quota = atoi(argv[3]) / 8 / (1000000 / slotLength);
|
|
|
|
// only one session
|
|
if (argc > 4)
|
|
listenOnce = atoi(argv[4]);
|
|
|
|
// set sendsize (if larger than 1460 will do packetization (fragmentation))
|
|
if (argc > 5)
|
|
sendsize = atoi(argv[5]);
|
|
|
|
// adjust slotLength to address packet size issue in the end
|
|
if ((quota % sendsize) > 0)
|
|
{
|
|
// printf("quota:%d,sendsize:%d,slotLength:%d\n", quota, sendsize, slotLength);
|
|
slotLength = (uint)((double)(quota / sendsize + 1) * sendsize / quota * slotLength);
|
|
quota = (quota / sendsize + 1) * sendsize;
|
|
// printf("quota:%d,sendsize:%d,slotLength:%d\n", quota, sendsize, slotLength);
|
|
}
|
|
|
|
// listen to socket
|
|
listenfd = socket(AF_INET, SOCK_DGRAM, 0);
|
|
// bind socket and listen
|
|
bzero(&servaddr, sizeof(servaddr));
|
|
servaddr.sin_family = AF_INET;
|
|
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
servaddr.sin_port = htons(atoi(argv[1]));
|
|
bind(listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr));
|
|
|
|
for (;;)
|
|
{
|
|
clilen = sizeof(cliaddr);
|
|
|
|
// wait for one client and accept it once found
|
|
ret = recvfrom(listenfd, sendbuf, 4096, 0, (struct sockaddr *)&cliaddr, &clilen);
|
|
if (ret <= 0)
|
|
{
|
|
fprintf(stderr, "! Fail to recv: ret:%d, err:%d; quiting..\n", ret, errno);
|
|
exit(1);
|
|
}
|
|
|
|
// check validity of udp transmission
|
|
if ((sendbuf[0] == '!') && (sendbuf[1] == '?') && (sendbuf[2] == '='))
|
|
{
|
|
printf("Accepted client at %s\n", inet_ntoa(cliaddr.sin_addr));
|
|
|
|
// get file size (bytes2send)
|
|
if (isNumber(argv[2]))
|
|
{
|
|
// set bytes to send
|
|
bytes2send = atoi(argv[2]);
|
|
// open file descriptor
|
|
fd = open("/dev/zero", O_RDONLY);
|
|
if (fd == -1)
|
|
{
|
|
fprintf(stderr, "! Unable to open /data/local/tmp/bigfile.\n");
|
|
exit(1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// open file descriptor
|
|
fd = open(argv[2], O_RDONLY);
|
|
if (fd == -1)
|
|
{
|
|
fprintf(stderr, "! Unable to open file %s.\n", argv[2]);
|
|
exit(1);
|
|
}
|
|
fstat(fd, &st);
|
|
bytes2send = st.st_size;
|
|
printf("bytes2send:%d\n", bytes2send);
|
|
}
|
|
|
|
// clear total_bytes_sent to 0
|
|
total_bytes_sent = 0;
|
|
sentInSlot = 0;
|
|
slot = 1;
|
|
|
|
// start timing
|
|
gettimeofday(&t_start, NULL);
|
|
|
|
// start to send
|
|
while (total_bytes_sent < bytes2send)
|
|
{
|
|
|
|
if ((bytes2send - total_bytes_sent) < quota)
|
|
{
|
|
quota = bytes2send - total_bytes_sent;
|
|
}
|
|
|
|
// send in slots
|
|
while (sentInSlot < quota)
|
|
{
|
|
// printf(
|
|
// "before: total_bytes_sent %d, sentInSlot %d, quota - sentInSlot %d\n",
|
|
// total_bytes_sent, sentInSlot, quota - sentInSlot);
|
|
read(fd, sendbuf, (quota - sentInSlot < sendsize) ? (quota - sentInSlot) : sendsize);
|
|
ret = sendto(
|
|
listenfd, sendbuf,
|
|
(quota - sentInSlot < sendsize) ? (quota - sentInSlot) : sendsize,
|
|
0, (struct sockaddr *)&cliaddr, sizeof(cliaddr));
|
|
|
|
if (ret <= 0)
|
|
{
|
|
fprintf(stderr, "! Fail to send: ret:%d, err:%d; wait for 100us..\n", ret, errno);
|
|
total_bytes_sent = bytes2send + 1;
|
|
break;
|
|
}
|
|
total_bytes_sent += ret;
|
|
sentInSlot += ret;
|
|
// printf(
|
|
// "after: total_bytes_sent %d, sentInSlot %d, quota - sentInSlot %d\n",
|
|
// total_bytes_sent, sentInSlot, quota - sentInSlot);
|
|
}
|
|
|
|
// workaround to break the while loop when error happens
|
|
if (total_bytes_sent > bytes2send)
|
|
{
|
|
break;
|
|
}
|
|
|
|
// control bandwidth
|
|
gettimeofday(&t_now, NULL);
|
|
elapsedTime = (t_now.tv_sec - t_start.tv_sec) * 1000000.0 + (t_now.tv_usec - t_start.tv_usec);
|
|
if (elapsedTime < slotLength * slot)
|
|
{
|
|
// printf(
|
|
// "sent %d, quota %d, bytes2send %d, usleep %lfus\n",
|
|
// total_bytes_sent, quota, bytes2send, slotLength * slot - elapsedTime);
|
|
usleep((int)(slotLength * slot - elapsedTime));
|
|
}
|
|
sentInSlot = 0;
|
|
++slot;
|
|
}
|
|
|
|
// end timing
|
|
if (total_bytes_sent == bytes2send)
|
|
{
|
|
gettimeofday(&t_end, NULL);
|
|
elapsedTime = (t_end.tv_sec - t_start.tv_sec) + (t_end.tv_usec - t_start.tv_usec) / 1000000.0;
|
|
printf(
|
|
"sent(bytes):%d\nduration(s):%lf\nthroughput(bps):%lf\n",
|
|
total_bytes_sent, elapsedTime, total_bytes_sent * 8 / elapsedTime);
|
|
|
|
ret = sendto(listenfd, "=?!\n", 4, 0, (struct sockaddr *)&cliaddr, sizeof(cliaddr));
|
|
if (ret <= 0)
|
|
{
|
|
fprintf(stderr, "! Unable to initialize data transfer. errno:%d.\n", errno);
|
|
close(fd);
|
|
close(listenfd);
|
|
exit(1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "! error: total_bytes_sent > bytes2send\n");
|
|
}
|
|
|
|
close(fd);
|
|
|
|
if (listenOnce)
|
|
break;
|
|
}
|
|
}
|
|
|
|
close(listenfd);
|
|
|
|
return 0;
|
|
} |