n = s->max_packet_bytes / s->buffer_bytes;
n += (s->max_packet_bytes % s->buffer_bytes) != 0;
vec_resize (s->buffer_indices, n);
n = s->max_packet_bytes / s->buffer_bytes;
n += (s->max_packet_bytes % s->buffer_bytes) != 0;
vec_resize (s->buffer_indices, n);