Just did some more debugging, and made a minimal "proof of concept":
int pkt4_send(CalloutHandle& handle) {
Pkt4Ptr response4_ptr;
handle.getArgument("response4", response4_ptr);
interesting << "Got argument " << "\n";
flush(interesting);
OptionPtr x_opt_ptr = response4_ptr->getOption(43);
interesting << "Got 43 " << "\n";
flush(interesting);
if (x_opt_ptr) {
interesting << "Val " << x_opt_ptr->toString() << "\n";
flush(interesting);
OptionPtr x_sub_ptr = x_opt_ptr->getOption(1);
interesting << "Got 01 " << "\n";
flush(interesting);
if (x_sub_ptr) {
interesting << "Val " << x_sub_ptr->toString()
<< "\n";
flush(interesting);
interesting << "Straight from the argument: "
<< x_sub_ptr->toString() << "\n";
flush(interesting);
x_opt_ptr->delOption(1);
x_sub_ptr.reset(new OptionString(Option::V4, 1,
"MyValue"));
x_opt_ptr->addOption(x_sub_ptr);
interesting << "And now it is: " <<
x_opt_ptr->toString() << "\n";
flush(interesting);
}
}
}
This gives me the following output:
====== 1. DHCP-packet after restart of kea-dhcp4: =====
Got argument
Got 43
Val type=043, len=041:,
options:
type=001, len=033: "cpe/config?hostname=@OPTION_82_2@" (string)
type=003, len=004: "http" (string)
Got 01
Val cpe/config?hostname=@OPTION_82_2@
Straight from the argument: cpe/config?hostname=@OPTION_82_2@
And now it is: type=043, len=015:,
options:
type=001, len=007: "MyValue" (string)
type=003, len=004: "http" (string)
====== 2. DHCP-packet =====
Got argument
Got 43
Val type=043, len=015:,
options:
type=001, len=007: "MyValue" (string)
type=003, len=004: "http" (string)
Got 01
Val MyValue
Straight from the argument: MyValue
And now it is: type=043, len=015:,
options:
type=001, len=007: "MyValue" (string)
type=003, len=004: "http" (string)
I am no C++-expert, so it is probably me who are changing a value I
should not change, but to me it looks like what I get from
handle.getArgument("response4", response4_ptr);
still contains data from the previous DHCP-packet is sent.
Rgds.
Ola Thoresen
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