Short answer….
.state('login', {
url: '/login/:a/:b/:c/:d',
templateUrl: 'views/login.html',
controller: 'LoginCtrl',
params: {
a: { squash: true, value: null },
b: { squash: true, value: null },
c: { squash: true, value: null },
d: { squash: true, value: null },
}
})