1 files changed, 133 insertions, 0 deletions
diff --git a/CS3871/timing/client.c b/CS3871/timing/client.c
new file mode 100644
index 0000000..9a83a5b
--- /dev/null
+++ b/CS3871/timing/client.c
@@ -0,0 +1,133 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/select.h>
+
+#define BUFFER_SIZE 1024
+
+typedef struct number_val {
+	int val;
+	struct timeval tv;
+} num;
+
+int sock_init(argv) 
+char **argv;
+{
+	struct sockaddr_in address, serv_addr;
+	int sock = 0, valread;
+	char buffer[1024] = {0};
+
+	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		perror("Socket creation error\n");
+		return -1;
+	}
+	
+	memset(&serv_addr, '0', sizeof(serv_addr));
+
+	serv_addr.sin_family = AF_INET;
+	serv_addr.sin_port = htons(atoi(argv[2]));
+
+	if (inet_pton(AF_INET, argv[1], &serv_addr.sin_addr) <= 0) {
+		perror("Invalid address/Address not supported\n");
+		return -1;
+	}
+
+	if (connect(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
+		perror("Connection Failed");
+		return -1;
+	}
+	return sock;
+}
+
+int main(argc, argv)
+int argc;
+char **argv;
+{
+	int sock = 0, valread, start_ptr = -1, end_ptr = 0, qset, i;
+	double avg = 0, cnt;
+	char buffer[1024] = {0};
+	num num_buffer[BUFFER_SIZE];	
+	fd_set rs, ws, es;
+	struct timeval now, *ww, tmp;
+
+	sock = sock_init(argv);
+
+	ww = NULL;
+
+	printf("Connected, waiting for numbers...\n");
+	while (1) {
+		FD_ZERO(&rs); FD_ZERO(&ws); FD_ZERO(&es);
+		FD_SET(sock, &rs);
+
+		qset = select(sock + 1, &rs, (fd_set *) 0, (fd_set *) 0, ww);
+		
+		gettimeofday(&now, NULL);
+		now.tv_sec = now.tv_sec - 60;
+
+		ww = &tmp;
+		tmp.tv_sec = 0;
+		tmp.tv_usec = 500000;
+
+		if (FD_ISSET(sock, &rs)) {
+			valread = read(sock, buffer, 1024);
+			for (i = 0; i < valread; i+=2) {
+				if (end_ptr == BUFFER_SIZE)
+					end_ptr = 0;
+				if (end_ptr != start_ptr) {
+					gettimeofday(&(num_buffer[end_ptr].tv), NULL);
+					num_buffer[end_ptr].val = atoi(buffer + i);
+					end_ptr++;
+				} else {
+					printf("dropping number...\n");
+				}
+			}
+		}
+
+		if (start_ptr == -1) 
+			start_ptr = 0;
+
+		if (start_ptr < end_ptr) {
+			for (i = start_ptr; i < end_ptr; i++) {
+				if (num_buffer[i].tv.tv_sec <= now.tv_sec)
+					start_ptr = i + 1;
+			}
+		} else {
+			for (i = start_ptr; i < BUFFER_SIZE; i++) {
+					num_buffer[end_ptr].val = atoi(buffer);
+					end_ptr++;
+					num_buffer[end_ptr].val = atoi(buffer);
+					end_ptr++;
+					num_buffer[end_ptr].val = atoi(buffer);
+					end_ptr++;
+				if (num_buffer[i].tv.tv_sec <= now.tv_sec)
+					start_ptr = i + 1;
+			}
+
+			for (i = 0; i < end_ptr; i++) {
+				if (num_buffer[i].tv.tv_sec <= now.tv_sec)
+					start_ptr = i + 1;
+			}
+
+			start_ptr %= BUFFER_SIZE;
+		}
+
+		avg = 0;
+		cnt = start_ptr > end_ptr ? (BUFFER_SIZE - start_ptr + end_ptr) : (end_ptr - start_ptr);
+		cnt = cnt == 0 ? 10 : cnt;
+
+		if (start_ptr < end_ptr) {
+			for (i = start_ptr; i < end_ptr; i++)
+				avg += num_buffer[i].val / cnt;
+		} else {
+			for (i = start_ptr; i < BUFFER_SIZE; i++)
+				avg += num_buffer[i].val / cnt;
+			for (i = 0; i < end_ptr; i++)
+				avg += num_buffer[i].val /cnt;
+		}
+
+		printf("avg: %10.5f\n", avg);
+	}
+}