X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=test.c;h=81244f90027819f5a456027c390f5a48ecd5a1ac;hb=16ecd6d75bfabb97193581bcc8095652759cdb8e;hp=757364f0f7e63432bf387ce6ce7a2637e45a9370;hpb=f4c52312544ee99bcce46ebcfc0c8e6ac6356fd5;p=utcp

diff --git a/test.c b/test.c
index 757364f..81244f9 100644
--- a/test.c
+++ b/test.c
@@ -2,6 +2,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <string.h>
 #include <time.h>
 #include <errno.h>
@@ -13,20 +14,49 @@
 
 #include "utcp.h"
 
+#define DIR_READ 1
+#define DIR_WRITE 2
+
 struct utcp_connection *c;
-int dir = 3;
+int dir = DIR_READ | DIR_WRITE;
 bool running = true;
+long inpktno;
+long outpktno;
+long dropfrom;
+long dropto;
+double reorder;
+long reorder_dist = 10;
 double dropin;
 double dropout;
+long total_out;
+long total_in;
+
+char *reorder_data;
+size_t reorder_len;
+int reorder_countdown;
+
+#if UTCP_DEBUG
+void debug(const char *format, ...) {
+	struct timeval now;
+	gettimeofday(&now, NULL);
+	fprintf(stderr, "%lu.%lu ", now.tv_sec, now.tv_usec / 1000);
+	va_list ap;
+	va_start(ap, format);
+	vfprintf(stderr, format, ap);
+	va_end(ap);
+}
+#else
+#define debug(...)
+#endif
 
 ssize_t do_recv(struct utcp_connection *c, const void *data, size_t len) {
 	if(!data || !len) {
 		if(errno) {
-			fprintf(stderr, "Error: %s\n", strerror(errno));
+			debug("Error: %s\n", strerror(errno));
 			dir = 0;
 		} else {
-			dir &= ~2;
-			fprintf(stderr, "Connection closed by peer\n");
+			dir &= ~DIR_WRITE;
+			debug("Connection closed by peer\n");
 		}
 		return -1;
 	}
@@ -36,14 +66,44 @@ ssize_t do_recv(struct utcp_connection *c, const void *data, size_t len) {
 void do_accept(struct utcp_connection *nc, uint16_t port) {
 	utcp_accept(nc, do_recv, NULL);
 	c = nc;
+	utcp_set_accept_cb(c->utcp, NULL, NULL);
 }
 
 ssize_t do_send(struct utcp *utcp, const void *data, size_t len) {
 	int s = *(int *)utcp->priv;
-	if(drand48() >= dropout)
-		return send(s, data, len, MSG_DONTWAIT);
-	else
-		return len;
+	outpktno++;
+	if(outpktno >= dropfrom && outpktno < dropto) {
+		if(drand48() < dropout) {
+			debug("Dropped outgoing packet\n");
+			return len;
+		}
+		if(!reorder_data && drand48() < reorder) {
+			reorder_data = malloc(len);
+			if(!reorder_data) {
+				debug("Out of memory\n");
+				return len;
+			}
+			reorder_len = len;
+			memcpy(reorder_data, data, len);
+			reorder_countdown = 1 + drand48() * reorder_dist;
+			return len;
+		}
+	}
+
+	if(reorder_data) {
+		if(--reorder_countdown < 0) {
+			total_out += reorder_len;
+			send(s, reorder_data, reorder_len, MSG_DONTWAIT);
+			free(reorder_data);
+			reorder_data = NULL;
+		}
+	}
+
+	total_out += len;
+	ssize_t result = send(s, data, len, MSG_DONTWAIT);
+	if(result <= 0)
+		debug("Error sending UDP packet: %s\n", strerror(errno));
+	return result;
 }
 
 int main(int argc, char *argv[]) {
@@ -56,8 +116,15 @@ int main(int argc, char *argv[]) {
 	bool server = argc == 2;
 	bool connected = false;
 
-	dropin = atof(getenv("DROPIN") ?: "0");
-	dropout = atof(getenv("DROPOUT") ?: "0");
+	if(getenv("DROPIN")) dropin = atof(getenv("DROPIN"));
+	if(getenv("DROPOUT")) dropout = atof(getenv("DROPOUT"));
+	if(getenv("DROPFROM")) dropfrom = atoi(getenv("DROPFROM"));
+	if(getenv("DROPTO")) dropto = atoi(getenv("DROPTO"));
+	if(getenv("REORDER")) reorder = atof(getenv("REORDER"));
+	if(getenv("REORDER_DIST")) reorder_dist = atoi(getenv("REORDER_DIST"));
+
+	if(dropto < dropfrom)
+		dropto = 1 << 30;
 
 	struct addrinfo *ai;
 	struct addrinfo hint = {
@@ -70,7 +137,7 @@ int main(int argc, char *argv[]) {
 		return 1;
 
 	int s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
-	if(s < 0)
+	if(s == -1)
 		return 1;
 
 	if(server) {
@@ -100,38 +167,63 @@ int main(int argc, char *argv[]) {
 	};
 
 	char buf[102400];
-	int timeout = utcp_timeout(u);
+	struct timeval timeout = utcp_timeout(u);
+
+	while(!connected || utcp_is_active(u)) {
+		size_t max = c ? utcp_get_sndbuf_free(c) : 0;
+		if(max > sizeof buf)
+			max = sizeof buf;
 
-	while(dir) {
-		poll(fds, 2, timeout);
+		int timeout_ms = timeout.tv_sec * 1000 + timeout.tv_usec / 1000 + 1;
+
+		debug("polling, dir = %d, timeout = %d\n", dir, timeout_ms);
+		if((dir & DIR_READ) && max)
+			poll(fds, 2, timeout_ms);
+		else
+			poll(fds + 1, 1, timeout_ms);
 
 		if(fds[0].revents) {
-			int len = read(0, buf, sizeof buf);
+			fds[0].revents = 0;
+			debug("stdin\n");
+			ssize_t len = read(0, buf, max);
 			if(len <= 0) {
 				fds[0].fd = -1;
-				dir &= ~1;
+				dir &= ~DIR_READ;
 				if(c)
 					utcp_shutdown(c, SHUT_WR);
-				if(len < 0)
+				if(len == -1)
 					break;
 				else
 					continue;
 			}
-			if(c)
-				utcp_send(c, buf, len);
+			if(c) {
+				ssize_t sent = utcp_send(c, buf, len);
+				if(sent != len)
+					debug("Short send: %zd != %zd\n", sent, len);
+			}
 		}
 
 		if(fds[1].revents) {
+			fds[1].revents = 0;
+			debug("netin\n");
 			struct sockaddr_storage ss;
 			socklen_t sl = sizeof ss;
 			int len = recvfrom(s, buf, sizeof buf, MSG_DONTWAIT, (struct sockaddr *)&ss, &sl);
-			if(len <= 0)
+			if(len <= 0) {
+				debug("Error receiving UDP packet: %s\n", strerror(errno));
 				break;
+			}
 			if(!connected)
 				if(!connect(s, (struct sockaddr *)&ss, sl))
 					connected = true;
-			if(drand48() >= dropin)
-				utcp_recv(u, buf, len);
+			inpktno++;
+			if(inpktno >= dropto || inpktno < dropfrom || drand48() >= dropin) {
+				total_in += len;
+				if(utcp_recv(u, buf, len) == -1)
+					debug("Error receiving UTCP packet: %s\n", strerror(errno));
+			} else {
+				debug("Dropped incoming packet\n");
+			}
 		}
 
 		timeout = utcp_timeout(u);
@@ -139,6 +231,9 @@ int main(int argc, char *argv[]) {
 
 	utcp_close(c);
 	utcp_exit(u);
+	free(reorder_data);
+
+	debug("Total bytes in: %ld, out: %ld\n", total_in, total_out);
 
 	return 0;
 }