Method CommandAdd

core/modules/rewrite.cc:48–82

}

CommandResponse Rewrite::CommandAdd(const bess::pb::RewriteArg &arg) {
  size_t curr = num_templates_;

  if (curr + arg.templates_size() > bess::PacketBatch::kMaxBurst) {
    return CommandFailure(EINVAL, "max %zu packet templates can be used %zu %d",
                          bess::PacketBatch::kMaxBurst, curr,
                          arg.templates_size());
  }

  for (int i = 0; i < arg.templates_size(); i++) {
    const auto &templ = arg.templates(i);

    if (templ.length() > kMaxTemplateSize) {
      return CommandFailure(EINVAL, "template is too big");
    }

    memset(templates_[curr + i], 0, kMaxTemplateSize);
    bess::utils::Copy(templates_[curr + i], templ.c_str(), templ.length());
    template_size_[curr + i] = templ.length();
  }

  num_templates_ = curr + arg.templates_size();
  if (num_templates_ == 0) {
    return CommandSuccess();
  }

  for (size_t i = num_templates_; i < kNumSlots; i++) {
    size_t j = i % num_templates_;
    bess::utils::Copy(templates_[i], templates_[j], template_size_[j]);
    template_size_[i] = template_size_[j];
    jump_[i] = j;
  }

  return CommandSuccess();
}

CommandResponse Rewrite::CommandClear(const bess::pb::EmptyArg &) {
  next_turn_ = 0;