141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*
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* Initial commit by Yibo @ Jul. 28, 2015
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* Last update by Yanzi @ Sept. 27, 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 65536
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int main(int argc, char *argv[])
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{
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// defaults
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uint total_bytes_recv = 0;
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uint bytes, bytes_recv, bytes_in_pipe;
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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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char recvbuf[BUF_SIZ];
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struct sockaddr_in servaddr;
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// for misc
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int ret;
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int recvsize = 4096;
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// create two pipes
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int filedes[2];
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ret = pipe(filedes);
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if (argc < 3)
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{
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printf("Usage: %s <ip> <port> <[optional] recvsize (bytes)> <[optional] filepath>\n", argv[0]);
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exit(0);
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}
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// set sendsize (if larger than 1460 will do packetization (fragmentation))
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if (argc > 3)
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recvsize = atoi(argv[3]);
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// bind socket
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sockfd = socket(AF_INET, SOCK_STREAM, 0);
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bzero(&servaddr, sizeof(servaddr));
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servaddr.sin_family = AF_INET;
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servaddr.sin_addr.s_addr = inet_addr(argv[2]);
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servaddr.sin_port = htons(atoi(argv[3]));
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// connect socket
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if (connect(sockfd, (struct sockaddr *)&servaddr, sizeof(servaddr)) < 0)
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{
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fprintf(stderr, "! Unable to connect the server.\n");
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exit(1);
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}
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// if instrument to write to a file
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if (argc > 4)
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{
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fd = open(argv[4], O_WRONLY | O_CREAT | O_TRUNC);
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if (fd == -1) {
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fprintf(stderr, "! Unable to open file %s.\n", argv[4]);
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close(sockfd);
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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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fd = open("/dev/null", O_WRONLY);
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if (fd == -1) {
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fprintf(stderr, "! Unable to open file %s.\n", argv[2]);
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close(sockfd);
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exit(1);
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}
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}
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// start timing
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gettimeofday(&t_start, NULL);
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// start to receive
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for (;;)
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{
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// printf("before: total_bytes_recv %d\n", total_bytes_recv);
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// Splice the data from in_fd into the pipe
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if ((bytes_recv = splice(sockfd, NULL, filedes[1], NULL,
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recvsize, SPLICE_F_MORE | SPLICE_F_MOVE)) <= 0) {
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if (errno == EINTR || errno == EAGAIN) {
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// Interrupted system call/try again
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// Just skip to the top of the loop and try again
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continue;
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}
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fprintf(stderr, "! splice error, errno: %d.\n", errno);
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exit(1);
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}
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// Splice the data from the pipe into out_fd
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bytes_in_pipe = bytes_recv;
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while (bytes_in_pipe > 0) {
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if ((bytes = splice(filedes[0], NULL, fd, NULL, bytes_in_pipe,
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SPLICE_F_MORE | SPLICE_F_MOVE)) <= 0) {
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if (errno == EINTR || errno == EAGAIN) {
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// Interrupted system call/try again
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// Just skip to the top of the loop and try again
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continue;
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}
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fprintf(stderr, "! splice error, errno: %d.\n", errno);
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exit(1);
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}
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bytes_in_pipe -= bytes;
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}
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total_bytes_recv += bytes_recv;
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// printf("after: total_bytes_recv %d\n", total_bytes_recv);
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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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"recv(bytes):%d\nduration(s):%lf\nthroughput(bps):%lf\n",
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total_bytes_recv, elapsedTime, total_bytes_recv * 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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