Added test cases

Makefile

@@ -3,13 +3,18 @@ CLIENT = iodine
 CLIENTOBJS = iodine.o tun.o dns.o read.o encoding.o
 SERVER = iodined
 SERVEROBJS = iodined.o tun.o dns.o read.o encoding.o
+TESTSUITE = tester
+TESTOBJS = test.o dns.o read.o encoding.o
 
 OS = `uname | tr "a-z" "A-Z"`
 
 LDFLAGS =  -lz
 CFLAGS = -c -g -Wall -D$(OS)
 
-all: stateos $(CLIENT) $(SERVER)
+all: stateos $(CLIENT) $(SERVER) $(TESTSUITE) 
+
+test:	$(TESTSUITE)
+	@./$(TESTSUITE)
 
 stateos:
 	@echo OS is $(OS)
@@ -22,6 +27,10 @@ $(SERVER): $(SERVEROBJS)
 	@echo LD $@
 	@$(CC) $(SERVEROBJS) -o $(SERVER) $(LDFLAGS)
 
+$(TESTSUITE): $(TESTOBJS)
+	@echo LD $@
+	@$(CC) $(TESTOBJS) -o $(TESTSUITE) $(LDFLAGS)
+	@echo To run test suite, do \"make test\"
 .c.o: 
 	@echo CC $<
 	@$(CC) $(CFLAGS) $< -o $@

test.c

@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2006 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "structs.h"
+#include "dns.h"
+#include "read.h"
+
+int
+main()
+{
+	short tshort;
+	short temps;
+	short putted;
+	short *s;
+
+	long tint;
+	long tempi;
+	long putint;
+	long *l;
+	
+	int i;
+	char buf[4];
+	char* p;
+
+	printf("iodine test suite\n");
+	printf("Testing read/putshort... ");
+	fflush(stdout);
+
+	for (i = 0; i < 65536; i++) {
+		tshort = (unsigned short) i;
+		temps = htons(tshort);
+		p = buf;
+		putshort(&p, tshort);
+		s = &putted;
+		memcpy(s, buf, sizeof(short));
+		if (putted != temps) {
+			printf("Bad value on putshort for %d\n", i);
+			exit(1);
+		}
+		s = &temps;
+		memcpy(buf, s, sizeof(short));
+		p = buf;
+		readshort(NULL, &p, &temps);
+		if (temps != tshort) {
+			printf("Bad value on readshort for %d\n", i);
+			exit(1);
+		}
+	}
+
+	printf("OK\n");
+
+	printf("Testing read/putlong... ");
+	fflush(stdout);
+
+	for (i = 0; i < 32; i++) {
+		tint = 0xF << i;
+		tempi = htonl(tint);
+		p = buf;
+		putlong(&p, tint);
+		l = &putint;
+		memcpy(l, buf, sizeof(int));
+		if (putint != tempi) {
+			printf("Bad value on putlong for %d\n", i);
+			exit(2);
+		}
+		l = &tempi;
+		memcpy(buf, l, sizeof(int));
+		p = buf;
+		readlong(NULL, &p, &tempi);
+		if (tempi != tint) {
+			printf("Bad value on readlong for %d\n", i);
+			exit(2);
+		}
+	}
+
+	printf("OK\n");
+
+
+	printf("All went well :)\n");
+	return 0;
+}