289 lines
8.9 KiB
C
289 lines
8.9 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 ETH_P_IP 0x0800 /* Internet Protocol packet */
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#define ETH_ALEN 6 /* from <net/ethernet.h> */
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#define ETH_P_ALL 0x0003
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#define MY_DEST_MAC0 0x18
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#define MY_DEST_MAC1 0x03
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#define MY_DEST_MAC2 0x73
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#define MY_DEST_MAC3 0xc8
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#define MY_DEST_MAC4 0x86
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#define MY_DEST_MAC5 0x52
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#define DEFAULT_IF "wlan0"
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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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off_t offset = 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 i, j, fd; // file descriptor of file to send
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int sockfd; // socket
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int tx_len = 0;
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char sendbuf[BUF_SIZ];
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struct ifreq if_idx;
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struct ifreq if_mac;
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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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char ifName[IFNAMSIZ];
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// for misc
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int ret;
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int sendsize = 1500; // 1500 MTU (raw socket)
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int bytes2send = 0;
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struct stat st;
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unsigned char my_dest_mac[6];
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if (argc < 3)
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{
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printf("Usage: %s <bytes2send/file2send> <dest MAC address> <[optional] bandwidth (bps)> <[optional] sendsize (bytes)> <[optional] interface>\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 > 3)
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quota = atoi(argv[3]) / 8 / (1000000 / slotLength);
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// set sendsize (if larger than 1460 will do packetization (fragmentation))
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if (argc > 4)
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sendsize = atoi(argv[4]);
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// set interface
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if (argc > 5) {
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strcpy(ifName, argv[5]);
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} else {
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strcpy(ifName, DEFAULT_IF);
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}
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// adjust slotLength to address packet size issue in the end
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if ((quota % sendsize) > 0)
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{
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// printf("quota:%d,sendsize:%d,slotLength:%d\n", quota, sendsize, slotLength);
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slotLength = (uint)((double)(quota / sendsize + 1) * sendsize / quota * slotLength);
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quota = (quota / sendsize + 1) * sendsize;
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// printf("quota:%d,sendsize:%d,slotLength:%d\n", quota, sendsize, slotLength);
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}
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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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if ((sockfd = socket(AF_PACKET, SOCK_RAW, IPPROTO_RAW)) == -1)
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{
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fprintf(stderr, "! raw socket error.\n");
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exit(1);
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}
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// Get the index of the interface to send on
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memset(&if_idx, 0, sizeof(struct ifreq));
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strncpy(if_idx.ifr_name, ifName, IFNAMSIZ - 1);
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if (ioctl(sockfd, SIOCGIFINDEX, &if_idx) < 0)
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{
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fprintf(stderr, "! SIOCGIFINDEX error. Check permission.\n");
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exit(1);
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}
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// Get the MAC address of the interface to send on
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memset(&if_mac, 0, sizeof(struct ifreq));
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strncpy(if_mac.ifr_name, ifName, IFNAMSIZ - 1);
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if (ioctl(sockfd, SIOCGIFHWADDR, &if_mac) < 0)
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{
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fprintf(stderr, "! SIOCGIFHWADDR error. Check permission.\n");
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exit(1);
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}
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// Set mem
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memset(sendbuf, 0, BUF_SIZ);
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// parse input MAC address
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sscanf(
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argv[2], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
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&my_dest_mac[0], &my_dest_mac[1], &my_dest_mac[2],
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&my_dest_mac[3], &my_dest_mac[4], &my_dest_mac[5]);
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printf("destMAC:%02x:%02x:%02x:%02x:%02x:%02x\n",
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my_dest_mac[0], my_dest_mac[1], my_dest_mac[2],
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my_dest_mac[3], my_dest_mac[4], my_dest_mac[5]);
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// Construct the Ethernet header
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eh->ether_shost[0] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[0];
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eh->ether_shost[1] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[1];
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eh->ether_shost[2] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[2];
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eh->ether_shost[3] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[3];
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eh->ether_shost[4] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[4];
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eh->ether_shost[5] = ((uint8_t *)&if_mac.ifr_hwaddr.sa_data)[5];
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eh->ether_dhost[0] = my_dest_mac[0];
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eh->ether_dhost[1] = my_dest_mac[1];
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eh->ether_dhost[2] = my_dest_mac[2];
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eh->ether_dhost[3] = my_dest_mac[3];
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eh->ether_dhost[4] = my_dest_mac[4];
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eh->ether_dhost[5] = my_dest_mac[5];
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eh->ether_type = htons(ETH_P_IP);
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tx_len += sizeof(struct ether_header);
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// Index of the network device
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socket_address.sll_ifindex = if_idx.ifr_ifindex;
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// Address length
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socket_address.sll_halen = ETH_ALEN;
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// Destination MAC
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socket_address.sll_addr[0] = MY_DEST_MAC0;
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socket_address.sll_addr[1] = MY_DEST_MAC1;
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socket_address.sll_addr[2] = MY_DEST_MAC2;
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socket_address.sll_addr[3] = MY_DEST_MAC3;
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socket_address.sll_addr[4] = MY_DEST_MAC4;
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socket_address.sll_addr[5] = MY_DEST_MAC5;
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if(bind(sockfd, (struct sockaddr *) &socket_address, sizeof(struct sockaddr_ll)) < 0) {
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perror("bind\n");
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exit(-1);
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}
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ret = sendto(
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sockfd, sendbuf, sendsize,
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MSG_DONTWAIT, (struct sockaddr*)&socket_address, sizeof(struct sockaddr_ll));
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// fprintf(stderr, "! Fail to send: ret:%d, err:%d; wait for 100us..\n", ret, errno);
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// start timing
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gettimeofday(&t_start, NULL);
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// read(fd, sendbuf + tx_len, sendsize - tx_len);
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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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ret = sendfile(sockfd, fd, &offset,
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((quota - sentInSlot < (sendsize - tx_len)) ? (quota - sentInSlot) : (sendsize - tx_len)));
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// read(
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// fd, sendbuf + tx_len,
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// (
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// ((quota - sentInSlot) < (sendsize - tx_len)) ?
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// (quota - sentInSlot) : (sendsize - tx_len))
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// );
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// ret = sendto(
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// sockfd, sendbuf,
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// (quota - sentInSlot < sendsize) ? (quota - sentInSlot) : sendsize,
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// MSG_DONTWAIT, (struct sockaddr*)&socket_address, sizeof(struct sockaddr_ll));
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if (ret <= 0)
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{
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fprintf(stderr, "! Fail to send: ret:%d, err:%d; wait for 100us..\n", ret, errno);
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usleep(100);
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continue;
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}
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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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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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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(
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"sent(bytes):%d\nduration(s):%lf\nthroughput(bps):%lf\n",
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total_bytes_sent, elapsedTime, total_bytes_sent * 8 / elapsedTime);
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close(sockfd);
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close(fd);
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return 0;
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}
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