Merge pull request #221 from lakinduakash/dev

Able to customize gateway
Add tests

.github/workflows/build.yml

@@ -13,5 +13,6 @@ jobs:
       run: |
         sudo apt-get update
         sudo apt-get install -y libgtk-3-dev libqrencode-dev libpng-dev build-essential gcc g++ pkg-config make
+        make test
         make
         sudo make install

Makefile

@@ -8,6 +8,11 @@ install:
 	@echo "Installing..."
 	cd src && $(MAKE) install
 
+test:
+	mkdir -p build
+	@echo "Testing..."
+	cd test && $(MAKE)
+
 install-cli-only:
 	@echo "Installing command line interface only..."
 	cd src/scripts && $(MAKE) install-cli-only
@@ -19,7 +24,8 @@ uninstall:
 clean-old:
 	cd src && $(MAKE) clean-old
 
-.PHONY: clean
+.PHONY: clean test
 
 clean:
 	cd src && $(MAKE) clean
+	cd test && $(MAKE) clean

debian/changelog

@@ -1,4 +1,4 @@
-linux-wifi-hotspot (4.3.3) UNRELEASED; urgency=high
+linux-wifi-hotspot (4.4.0) UNRELEASED; urgency=low
 
   * Minor secrurty fixes
 

src/scripts/create_ap.conf

@@ -1,5 +1,5 @@
 CHANNEL=default
-GATEWAY=10.0.0.1
+GATEWAY=192.168.12.1
 WPA_VERSION=2
 ETC_HOSTS=0
 DHCP_DNS=gateway

src/ui/glade/about.glade

@@ -9,7 +9,7 @@
     <property name="type_hint">dialog</property>
     <property name="gravity">center</property>
     <property name="program_name">Linux Wifi Hotspot</property>
-    <property name="version">4.3.3</property>
+    <property name="version">4.4.0</property>
     <property name="copyright" translatable="yes">(c) lakinduakash 2021</property>
     <property name="comments" translatable="yes">For more info visit
 https://github.com/lakinduakash/linux-wifi-hotspot</property>

src/ui/glade/wifih.ui

@@ -220,6 +220,60 @@
                             <property name="margin_bottom">5</property>
                             <property name="row_spacing">10</property>
                             <property name="column_homogeneous">True</property>
+                            <child>
+                              <object class="GtkRadioButton" id="rb_freq_2">
+                                <property name="label" translatable="yes">2.4Ghz</property>
+                                <property name="visible">True</property>
+                                <property name="can_focus">True</property>
+                                <property name="receives_default">False</property>
+                                <property name="draw_indicator">True</property>
+                                <property name="group">rb_freq_auto</property>
+                              </object>
+                              <packing>
+                                <property name="left_attach">2</property>
+                                <property name="top_attach">0</property>
+                              </packing>
+                            </child>
+                            <child>
+                              <object class="GtkRadioButton" id="rb_freq_auto">
+                                <property name="label" translatable="yes">Auto</property>
+                                <property name="visible">True</property>
+                                <property name="can_focus">True</property>
+                                <property name="receives_default">False</property>
+                                <property name="draw_indicator">True</property>
+                                <property name="group">rb_freq_5</property>
+                              </object>
+                              <packing>
+                                <property name="left_attach">1</property>
+                                <property name="top_attach">0</property>
+                              </packing>
+                            </child>
+                            <child>
+                              <object class="GtkLabel">
+                                <property name="visible">True</property>
+                                <property name="can_focus">False</property>
+                                <property name="halign">start</property>
+                                <property name="label" translatable="yes">Frequency band</property>
+                              </object>
+                              <packing>
+                                <property name="left_attach">0</property>
+                                <property name="top_attach">0</property>
+                              </packing>
+                            </child>
+                            <child>
+                              <object class="GtkRadioButton" id="rb_freq_5">
+                                <property name="label" translatable="yes">5Ghz</property>
+                                <property name="visible">True</property>
+                                <property name="can_focus">True</property>
+                                <property name="receives_default">False</property>
+                                <property name="draw_indicator">True</property>
+                                <property name="group">rb_freq_auto</property>
+                              </object>
+                              <packing>
+                                <property name="left_attach">3</property>
+                                <property name="top_attach">0</property>
+                              </packing>
+                            </child>
                             <child>
                               <object class="GtkCheckButton" id="cb_hidden">
                                 <property name="label" translatable="yes">Hidden</property>
@@ -233,19 +287,6 @@
                                 <property name="top_attach">1</property>
                               </packing>
                             </child>
-                            <child>
-                              <object class="GtkCheckButton" id="cb_no_haveged">
-                                <property name="label">No Haveged</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">False</property>
-                                <property name="draw_indicator">True</property>
-                              </object>
-                              <packing>
-                                <property name="left_attach">0</property>
-                                <property name="top_attach">9</property>
-                              </packing>
-                            </child>
                             <child>
                               <object class="GtkCheckButton" id="cb_psk">
                                 <property name="label" translatable="yes">Use psk</property>
@@ -322,57 +363,27 @@
                               </packing>
                             </child>
                             <child>
-                              <object class="GtkRadioButton" id="rb_freq_2">
+                              <object class="GtkCheckButton" id="cb_gateway">
-                                <property name="label" translatable="yes">2.4Ghz</property>
+                                <property name="label" translatable="yes">Gateway</property>
                                 <property name="visible">True</property>
                                 <property name="can_focus">True</property>
                                 <property name="receives_default">False</property>
                                 <property name="draw_indicator">True</property>
-                                <property name="group">rb_freq_auto</property>
-                              </object>
-                              <packing>
-                                <property name="left_attach">2</property>
-                                <property name="top_attach">0</property>
-                              </packing>
-                            </child>
-                            <child>
-                              <object class="GtkRadioButton" id="rb_freq_auto">
-                                <property name="label" translatable="yes">Auto</property>
-                                <property name="visible">True</property>
-                                <property name="can_focus">True</property>
-                                <property name="receives_default">False</property>
-                                <property name="draw_indicator">True</property>
-                                <property name="group">rb_freq_5</property>
-                              </object>
-                              <packing>
-                                <property name="left_attach">1</property>
-                                <property name="top_attach">0</property>
-                              </packing>
-                            </child>
-                            <child>
-                              <object class="GtkLabel">
-                                <property name="visible">True</property>
-                                <property name="can_focus">False</property>
-                                <property name="halign">start</property>
-                                <property name="label" translatable="yes">Frequency band</property>
                               </object>
                               <packing>
                                 <property name="left_attach">0</property>
-                                <property name="top_attach">0</property>
+                                <property name="top_attach">6</property>
                               </packing>
                             </child>
                             <child>
-                              <object class="GtkRadioButton" id="rb_freq_5">
+                              <object class="GtkEntry" id="entry_gateway">
-                                <property name="label" translatable="yes">5Ghz</property>
                                 <property name="visible">True</property>
                                 <property name="can_focus">True</property>
-                                <property name="receives_default">False</property>
+                                <property name="halign">start</property>
-                                <property name="draw_indicator">True</property>
-                                <property name="group">rb_freq_auto</property>
                               </object>
                               <packing>
-                                <property name="left_attach">3</property>
+                                <property name="left_attach">1</property>
-                                <property name="top_attach">0</property>
+                                <property name="top_attach">6</property>
                               </packing>
                             </child>
                             <child>
@@ -385,7 +396,7 @@
                               </object>
                               <packing>
                                 <property name="left_attach">0</property>
-                                <property name="top_attach">6</property>
+                                <property name="top_attach">7</property>
                               </packing>
                             </child>
                             <child>
@@ -398,7 +409,7 @@
                               </object>
                               <packing>
                                 <property name="left_attach">1</property>
-                                <property name="top_attach">6</property>
+                                <property name="top_attach">7</property>
                                 <property name="height">2</property>
                               </packing>
                             </child>
@@ -412,7 +423,7 @@
                               </object>
                               <packing>
                                 <property name="left_attach">0</property>
-                                <property name="top_attach">8</property>
+                                <property name="top_attach">9</property>
                               </packing>
                             </child>
                             <child>
@@ -425,9 +436,28 @@
                               </object>
                               <packing>
                                 <property name="left_attach">2</property>
-                                <property name="top_attach">8</property>
+                                <property name="top_attach">9</property>
                               </packing>
                             </child>
+                            <child>
+                              <object class="GtkCheckButton" id="cb_no_haveged">
+                                <property name="label">No Haveged</property>
+                                <property name="visible">True</property>
+                                <property name="can_focus">True</property>
+                                <property name="receives_default">False</property>
+                                <property name="draw_indicator">True</property>
+                              </object>
+                              <packing>
+                                <property name="left_attach">0</property>
+                                <property name="top_attach">10</property>
+                              </packing>
+                            </child>
+                            <child>
+                              <placeholder/>
+                            </child>
+                            <child>
+                              <placeholder/>
+                            </child>
                             <child>
                               <placeholder/>
                             </child>

src/ui/h_prop.c

@@ -101,9 +101,9 @@ const char *build_wh_start_command(char *iface_src, char *iface_dest, char *ssid
 
 const char *build_wh_mkconfig_command(ConfigValues* cv){
 
-    const char* a=get_config_file(CONFIG_FILE_NAME);
+    const char* config_ffile_name=get_config_file(CONFIG_FILE_NAME);
 
-    snprintf(cmd_mkconfig, BUFSIZE, "%s %s %s %s '%s' '%s' %s %s",SUDO, CREATE_AP, cv->iface_wifi, cv->iface_inet, cv->ssid, cv->pass,MKCONFIG,a);
+    snprintf(cmd_mkconfig, BUFSIZE, "%s %s %s %s '%s' '%s' %s %s",SUDO, CREATE_AP, cv->iface_wifi, cv->iface_inet, cv->ssid, cv->pass,MKCONFIG,config_ffile_name);
 
     if(cv->freq!=NULL){
         strcat(cmd_mkconfig," --freq-band ");
@@ -141,6 +141,11 @@ const char *build_wh_mkconfig_command(ConfigValues* cv){
         strcat(cmd_mkconfig, cv->mac);
     }
 
+    if(cv->gateway!=NULL) {
+        strcat(cmd_mkconfig, " --gateway ");
+        strcat(cmd_mkconfig, cv->gateway);
+    }
+
     if(cv->mac_filter!=NULL && (strcmp(cv->mac_filter,"1") == 0)){
         strcat(cmd_mkconfig, " --mac-filter ");
         strcat(cmd_mkconfig, cv->mac_filter);

src/ui/read_config.cpp

@@ -134,6 +134,9 @@ static void setConfigValues(const char * key, char *value){
     if( !strcmp ( IEEE80211AC, key ))
         configValues.ieee80211ac = value;
         
+    if( !strcmp ( GATEWAY, key ))
+        configValues.gateway = value;
+
 }
 
 

src/ui/read_config.h

@@ -92,6 +92,7 @@ typedef struct{
     char *ieee80211n;
     char *ieee80211ac;
     char *no_haveged;
+    char *gateway;
 } ConfigValues;
 
 

src/ui/ui.c

@@ -52,6 +52,9 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define ERROR_CHANNEL_MSG_2 "Channel must be 1-11"
 #define ERROR_CHANNEL_MSG_5 "Channel must be 1-196"
 #define ERROR_MAC_MSG "Invalid Mac address"
+#define ERROR_GATEWAY_MSG "Invalid gateway IP address"
+
+#define DEFAULT_GATEWAY_IP "192.168.12.1"
 
 GtkBuilder *builder;
 GObject *window;
@@ -72,6 +75,7 @@ GtkEntry *entry_ssd;
 GtkEntry *entry_pass;
 GtkEntry *entry_mac;
 GtkEntry *entry_channel;
+GtkEntry *entry_gateway;
 GtkTextView *tv_mac_filter;
 
 GtkTextBuffer *buffer_mac_filter;
@@ -86,6 +90,7 @@ GtkRadioButton *rb_freq_5;
 GtkCheckButton *cb_hidden;
 GtkCheckButton *cb_no_haveged;
 GtkCheckButton *cb_psk;
+GtkCheckButton *cb_gateway;
 GtkCheckButton *cb_mac;
 GtkCheckButton *cb_novirt;
 GtkCheckButton *cb_channel;
@@ -111,6 +116,7 @@ GtkStyleContext *context_entry_ssid;
 GtkStyleContext *context_entry_channel;
 GtkStyleContext *context_label_input_error;
 GtkStyleContext *context_tv_mac_filter;
+GtkStyleContext *context_entry_gateway;
 
 
 const char** iface_list;
@@ -142,9 +148,12 @@ static void on_create_hp_clicked(GtkWidget *widget, gpointer data) {
 
 
     if(validator(&configValues) == FALSE){
-        set_error_text("Check inputs");
+        set_error_text("Some inputes are not valid!");
         return;
     }
+    else{
+        set_error_text("");
+    }
 
 
     startShell(build_wh_mkconfig_command(&configValues));
@@ -187,6 +196,7 @@ static void init_style_contexts(){
     context_entry_channel = gtk_widget_get_style_context((GtkWidget*)entry_channel);
     context_label_input_error = gtk_widget_get_style_context((GtkWidget*)label_input_error);
     context_tv_mac_filter = gtk_widget_get_style_context((GtkWidget*)tv_mac_filter);
+    context_entry_gateway = gtk_widget_get_style_context((GtkWidget*)entry_gateway);
 
 }
 
@@ -343,6 +353,30 @@ static void* tv_mac_filter_warn(){
     return NULL;
 }
 
+static void* entry_gateway_warn(GtkWidget *widget, gpointer data){
+
+    const char *gateway = gtk_entry_get_text(GTK_ENTRY(widget));
+
+    if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(cb_gateway))==TRUE){
+        if (isValidIPaddress(gateway)==-1){
+            gtk_style_context_add_class(context_tv_mac_filter, "entry-error");
+            set_error_text(ERROR_GATEWAY_MSG);
+            return FALSE;
+        }
+        else{
+            set_error_text("");
+            gtk_style_context_remove_class(context_tv_mac_filter,"entry-error");
+            return NULL;
+        }
+        
+    }
+
+    gtk_style_context_remove_class(context_tv_mac_filter,"entry-error");
+    set_error_text("");
+
+    return NULL;
+}
+
 
 static void *update_freq_toggle(){
     if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(rb_freq_2)))
@@ -386,7 +420,9 @@ int initUi(int argc, char *argv[]){
 
     entry_mac = (GtkEntry *) gtk_builder_get_object(builder, "entry_mac");
     entry_channel = (GtkEntry *) gtk_builder_get_object(builder, "entry_channel");
-    tv_mac_filter = (GtkTextView *) gtk_builder_get_object(builder, "tv_mac_filter");
+    entry_gateway = (GtkEntry *) gtk_builder_get_object(builder, "entry_gateway");
+
+    tv_mac_filter = (GtkTextView *) gtk_builder_get_object(builder, "entry_gateway");
 
     buffer_mac_filter = gtk_text_view_get_buffer (GTK_TEXT_VIEW (tv_mac_filter));
 
@@ -399,6 +435,7 @@ int initUi(int argc, char *argv[]){
     cb_mac = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_mac");
     cb_novirt = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_novirt");
     cb_channel = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_channel");
+    cb_gateway = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_gateway");
     cb_open = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_open");
     cb_mac_filter = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_mac_filter");
     cb_ieee80211n = (GtkCheckButton *) gtk_builder_get_object(builder, "cb_ieee80211n");
@@ -430,6 +467,7 @@ int initUi(int argc, char *argv[]){
     g_signal_connect (cb_mac, "toggled", G_CALLBACK(on_cb_mac_toggle), NULL); //new
     g_signal_connect (cb_channel, "toggled", G_CALLBACK(on_cb_channel_toggle), NULL); //new
     g_signal_connect (cb_mac_filter, "toggled", G_CALLBACK(on_cb_mac_filter_toggle), NULL); //new
+    g_signal_connect (cb_gateway, "toggled", G_CALLBACK(on_cb_gateway_toggle), NULL); //new
 
     g_signal_connect (entry_mac, "changed", G_CALLBACK(entry_mac_warn), NULL);
     g_signal_connect (entry_ssd, "changed", G_CALLBACK(entry_ssid_warn), NULL);
@@ -438,6 +476,8 @@ int initUi(int argc, char *argv[]){
     g_signal_connect (entry_channel, "changed", G_CALLBACK(entry_channel_warn), NULL);
     g_signal_connect (buffer_mac_filter, "changed", G_CALLBACK(tv_mac_filter_warn), NULL);
 
+    g_signal_connect (entry_gateway, "changed", G_CALLBACK(entry_gateway_warn), NULL);
+
     g_signal_connect (rb_freq_2, "toggled", G_CALLBACK(update_freq_toggle), NULL);
     g_signal_connect (rb_freq_5, "toggled", G_CALLBACK(update_freq_toggle), NULL);
     g_signal_connect (rb_freq_auto, "toggled", G_CALLBACK(update_freq_toggle), NULL);
@@ -545,6 +585,16 @@ void init_ui_from_config(){
             gtk_toggle_button_set_active((GtkToggleButton*) cb_novirt,TRUE);
         }
 
+        // Check if default ip is set as gateway
+        if(strcmp(values->gateway,DEFAULT_GATEWAY_IP)!=0){
+            gtk_toggle_button_set_active((GtkToggleButton*) cb_gateway,TRUE);
+            gtk_entry_set_text(entry_gateway,values->gateway);
+        } else {
+            gtk_widget_set_sensitive((GtkWidget*)entry_gateway, FALSE);
+            gtk_toggle_button_set_active((GtkToggleButton*) cb_gateway,FALSE); // Check this line needed
+            gtk_entry_set_text(entry_gateway,values->gateway);
+        }
+
         if(strcmp(values->mac_filter,"1")==0){
             gtk_toggle_button_set_active((GtkToggleButton*) cb_mac_filter,TRUE);
         } else {
@@ -806,6 +856,11 @@ static gboolean validator(ConfigValues *cv){
             return FALSE;
     }
 
+    if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(cb_gateway))==TRUE){
+        if (isValidIPaddress(cv->gateway)==-1)
+            return FALSE;
+    }
+
 
     return TRUE;
 }
@@ -846,6 +901,10 @@ static int init_config_val_input(ConfigValues* cv){
         else
             cv->channel = NULL;
 
+        if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(cb_gateway)))
+            cv->gateway = (char*)gtk_entry_get_text(entry_gateway);
+        else
+            cv->gateway = NULL;
         
         if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(cb_mac)))
             cv->mac = (char*)gtk_entry_get_text(entry_mac);
@@ -1025,3 +1084,16 @@ static void on_cb_mac_filter_toggle(GtkWidget *widget, gpointer data)
         gtk_widget_set_sensitive((GtkWidget*)tv_mac_filter, FALSE);
     }
 }
+
+
+/**
+ * When gateway button is not toogled, disable gateway entry
+*/
+static void on_cb_gateway_toggle(GtkWidget *widget, gpointer data)
+{
+    if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget))) {
+        gtk_widget_set_sensitive((GtkWidget*)entry_gateway, TRUE);
+    } else {
+        gtk_widget_set_sensitive((GtkWidget*)entry_gateway, FALSE);
+    }
+}

src/ui/ui.h

@@ -82,6 +82,8 @@ static void on_cb_channel_toggle(GtkWidget *widget, gpointer data);
 
 static void on_cb_mac_filter_toggle(GtkWidget *widget, gpointer data);
 
+static void on_cb_gateway_toggle(GtkWidget *widget, gpointer data);
+
 static void clear_connecetd_devices_list();
 
 #endif //WIHOTSPOT_UI_H

src/ui/util.c

@@ -98,25 +98,54 @@ int isValidMacAddress(const char* mac) {
 int isValidAcceptedMacs(const char *macs){
 
     /* Compile regular expression */
-reti = regcomp(&regex, "^(((([0-9A-Fa-f]{2}):){5}[0-9A-Fa-f]{2}\\s*)(^((([0-9A-Fa-f]{2}):){5}[0-9A-Fa-f]{2}\\s*))*)$", REG_EXTENDED);
+    reti = regcomp(&regex, "^(((([0-9A-Fa-f]{2}):){5}[0-9A-Fa-f]{2}\\s*)(^((([0-9A-Fa-f]{2}):){5}[0-9A-Fa-f]{2}\\s*))*)$", REG_EXTENDED);
-if (reti) {
+    if (reti) {
-    //printf( "Could not compile regex\n");
+        //printf( "Could not compile regex\n");
-    return -1;
+        return -1;
-}
+    }
 
-/* Execute regular expression */
+    /* Execute regular expression */
-reti = regexec(&regex, macs, 0, NULL, 0);
+    reti = regexec(&regex, macs, 0, NULL, 0);
-if (!reti) {
+    if (!reti) {
-    return 0;
+        return 0;
-}
+    }
-else if (reti == REG_NOMATCH) {
+    else if (reti == REG_NOMATCH) {
-    //puts("Invalid mac addresses");
+        //puts("Invalid mac addresses");
-    return -1;
+        return -1;
-}
+    }
-else {
+    else {
-    regerror(reti, &regex, msgbuf, sizeof(msgbuf));
+        regerror(reti, &regex, msgbuf, sizeof(msgbuf));
-    //printf("Regex match failed: %s\n", msgbuf);
+        //printf("Regex match failed: %s\n", msgbuf);
-    return -1;
+        return -1;
-}
+    }
+
+}
+
+int isValidIPaddress(const char * ip){
+
+
+     /* Compile regular expression */
+    reti = regcomp(&regex, 
+        "^(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$",
+        REG_EXTENDED);
+    if (reti) {
+        //printf( "Could not compile regex\n");
+        return -1;
+    }
+
+    /* Execute regular expression */
+    reti = regexec(&regex, ip, 0, NULL, 0);
+    if (!reti) {
+        return 0;
+    }
+    else if (reti == REG_NOMATCH) {
+        //puts("Invalid ip addresses");
+        return -1;
+    }
+    else {
+        regerror(reti, &regex, msgbuf, sizeof(msgbuf));
+        //printf("Regex match failed: %s\n", msgbuf);
+        return -1;
+    }
 
 }

src/ui/util.h

@@ -35,5 +35,6 @@ int find_str(char *find, const char **array, int length);
 void rand_str(char *dest, size_t length);
 int isValidMacAddress(const char*);
 int isValidAcceptedMacs(const char*);
+int isValidIPaddress(const char*);
 
 #endif //WIHOTSPOT_UTIL_H

test/Makefile

@@ -0,0 +1,37 @@
+CC=gcc
+PKGCONFIG = $(shell which pkg-config)
+
+CFLAGS=`pkg-config --cflags gtk+-3.0` -I./../src/ui
+
+LIBS=`pkg-config --libs gtk+-3.0 --libs x11` -lstdc++ -lpng -lqrencode
+
+
+ODIR=./../build
+
+# Determine this makefile's path.
+# Be sure to place this BEFORE `include` directives, if any.
+THIS_FILE := $(lastword $(MAKEFILE_LIST))
+
+_OBJ = util.o test_util.o
+OBJ = $(patsubst %,$(ODIR)/%,$(_OBJ))
+
+
+.PHONY: clean
+
+all: $(OBJ) test
+
+
+$(ODIR)/util.o: ../src/ui/util.c
+	$(CC) -c $? -o $@ $(CFLAGS)
+
+$(ODIR)/test_util.o: test_util.c
+	$(CC) -c $? -o $@ $(CFLAGS)
+
+test: $(OBJ)
+	$(CC) -o $(ODIR)/test $^
+	@$(ODIR)/test
+
+clean:
+	rm -f $(OBJ)
+	rm -f $(ODIR)/test
+

test/test_util.c

@@ -0,0 +1,14 @@
+#include <assert.h>
+#include <stdio.h>
+#include <util.h>
+
+int main(int argc, char *argv[]){
+
+    assert(0 == isValidIPaddress("192.12.23.123"));
+    assert(0 == isValidIPaddress("255.255.255.255"));
+    assert(-1 == isValidIPaddress("255.255.255.256"));
+    assert(-1 == isValidIPaddress("255.255.255.2551"));
+    assert(-1 == isValidIPaddress("192.168.12"));
+
+    return 0;
+}