sync

test/bounce.c

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