154 lines
4.3 KiB
C
154 lines
4.3 KiB
C
/*
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* Initial commit by Yibo @ Jul. 28, 2015
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* Last update by Yanzi @ Sept. 26, 2016
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*/
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#include <stdio.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <linux/if_packet.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <net/if.h>
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#include <netinet/ether.h>
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#include <sys/sendfile.h>
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#include <errno.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <fcntl.h>
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#define BUF_SIZ 4096
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char isNumber(char number[])
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{
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int i = 0;
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//checking for negative numbers
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if (number[0] == '-')
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i = 1;
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for (; number[i] != 0; i++)
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{
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//if (number[i] > '9' || number[i] < '0')
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if (!isdigit(number[i]))
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return 0;
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}
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return 1;
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}
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int main(int argc, char *argv[])
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{
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// defaults
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uint slotLength = 10000; // in microseconds, for bandwidth control
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uint quota = 1000000000; // default bytes per slot, default 1GB/slot
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uint sentInSlot = 0, slot = 1;
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uint total_bytes_sent = 0;
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// for timing
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double elapsedTime;
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struct timeval t_start, t_end, t_now;
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// for socket
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int fd; // file descriptor of file to send
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int sockfd; // socket
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// int sendsize = 1488;
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// char ifName[IFNAMSIZ];
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char sendbuf[BUF_SIZ];
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struct sockaddr_in servaddr;
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struct ether_header *eh = (struct ether_header *) sendbuf;
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struct iphdr *iph = (struct iphdr *) (sendbuf + sizeof(struct ether_header));
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// struct sockaddr_ll socket_address;
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// for misc
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int ret;
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int bytes2send = 0;
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struct stat st;
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if (argc < 2)
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{
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printf("Usage: %s <bytes2send/file2send> <[optional] bandwidth (bps)>\n", argv[0]);
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exit(0);
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}
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// set bandwidth
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if (argc > 2)
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quota = atoi(argv[2]) / 8 / (1000000 / slotLength);
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// get file size (bytes2send)
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if (isNumber(argv[1]))
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{
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// set bytes to send
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bytes2send = atoi(argv[1]);
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// open file descriptor
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fd = open("/data/local/tmp/bigfile", O_RDONLY);
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if (fd == -1)
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{
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fprintf(stderr, "! Unable to open /data/local/tmp/bigfile.\n");
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exit(1);
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}
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}
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else
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{
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// open file descriptor
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fd = open(argv[1], O_RDONLY);
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if (fd == -1)
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{
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fprintf(stderr, "! Unable to open file %s.\n", argv[1]);
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exit(1);
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}
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fstat(fd, &st);
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bytes2send = st.st_size;
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printf("bytes2send:%d\n", bytes2send);
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}
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// start timing
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gettimeofday(&t_start, NULL);
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// start to send
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while (total_bytes_sent < bytes2send)
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{
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if ((bytes2send - total_bytes_sent) < quota)
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{
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quota = bytes2send - total_bytes_sent;
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}
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// send in slots
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while (sentInSlot < quota)
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{
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// printf(
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// "before: total_bytes_sent %d, sentInSlot %d, quota - sentInSlot %d\n",
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// total_bytes_sent, sentInSlot, quota - sentInSlot);
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read(fd, sendbuf, (quota - sentInSlot < BUF_SIZ) ? (quota - sentInSlot) : BUF_SIZ);
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ret = (quota - sentInSlot < BUF_SIZ) ? (quota - sentInSlot) : BUF_SIZ;
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total_bytes_sent += ret;
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sentInSlot += ret;
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// printf(
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// "after: total_bytes_sent %d, sentInSlot %d, quota - sentInSlot %d\n",
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// total_bytes_sent, sentInSlot, quota - sentInSlot);
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}
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// control bandwidth
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if (total_bytes_sent < bytes2send)
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{
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gettimeofday(&t_now, NULL);
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elapsedTime = (t_now.tv_sec - t_start.tv_sec) * 1000000.0 + (t_now.tv_usec - t_start.tv_usec);
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if (elapsedTime < slotLength * slot)
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{
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// printf(
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// "sent %d, quota %d, bytes2send %d, usleep %lfus\n",
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// total_bytes_sent, quota, bytes2send, slotLength * slot - elapsedTime);
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usleep((int)(slotLength * slot - elapsedTime));
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}
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}
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sentInSlot = 0;
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++slot;
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}
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// end timing
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gettimeofday(&t_end, NULL);
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elapsedTime = (t_end.tv_sec - t_start.tv_sec) + (t_end.tv_usec - t_start.tv_usec) / 1000000.0;
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printf("duration(s):%lf\nthroughput(bps):%lf\n", elapsedTime, total_bytes_sent * 8 / elapsedTime);
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close(fd);
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return 0;
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}
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