Summary form only given. We have mapped the different kinds of dynamics observed experimentally in a conventional Fabry-Perot laser diode under optical injection as a function of the detuning between the master and free-running slave lasers and the amplitude of the injected field. Stable injection locking, periodic oscillations at the injection-modified carrier-field resonance frequency, period-doubling and quadrupling, chaotic dynamics, four-wave mixing and multiwave mixing, subharmonic resonances at half the injection frequency offset and mode hopping to other longitudinal modes are all observed under different injection conditions.