96 lines
1.8 KiB
C
96 lines
1.8 KiB
C
#include <arpa/inet.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/if.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <linux/ip.h>
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#include <linux/udp.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <signal.h>
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#include <getopt.h>
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#define PORT 39000
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void sigalarm(int junk);
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unsigned long long recv_count = 0;
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unsigned long pps = 0;
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unsigned long bytes = 0;
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unsigned long dropped = 0, seq = 0;
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unsigned port = PORT;
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int main(int argc, char *argv[])
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{
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int on = 1;
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struct sockaddr_in addr;
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int s;
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char *packet;
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while ((s = getopt(argc, argv, "?p:")) > 0)
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{
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switch (s)
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{
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case 'p' :
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port = atoi(optarg);
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break;
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case '?' :
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printf("Options:\n");
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printf("\t-p port to listen on\n");
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return(0);
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break;
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}
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}
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_port = htons(port);
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s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
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if (bind(s, (void *) &addr, sizeof(addr)) < 0)
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{
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perror("bind");
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return -1;
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}
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signal(SIGALRM, sigalarm);
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alarm(1);
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printf("Waiting on port %d\n", port);
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packet = (char *)malloc(65535);
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while (1)
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{
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struct sockaddr_in addr;
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int alen = sizeof(addr), l;
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unsigned int iseq;
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l = recvfrom(s, packet, 65535, 0, (void *) &addr, &alen);
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if (l < 0) continue;
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recv_count++;
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pps++;
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bytes += l;
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iseq = *((unsigned int *) packet);
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if (seq != iseq)
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dropped += (iseq - seq);
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seq = iseq + 1;
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sendto(s, packet, l, 0, (struct sockaddr *)&addr, alen);
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}
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free(packet);
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}
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void sigalarm(int junk)
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{
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printf("Recv: %10llu %0.1fMbits/s (%lu pps) (%5ld dropped)\n", recv_count, (bytes / 1024.0 / 1024.0 * 8), pps, dropped);
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pps = bytes = 0;
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alarm(1);
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}
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