BinPac - Many repeated messages in the same packet

Development
#1

I am running into an implementation issue with BinPac and would hope
to find a few pointers.

I have a protocol that loads a given TCP packet with as many publish
messages as possible in a worst case scenario - often it just has a
single message, but it is not guaranteed. When a publish message
contains more than one subsequent message, there is not an indicator
that another message follows.

The packet looks, generally like this:

#2

Aaron,

I have a protocol that loads a given TCP packet with as many publish
messages as possible in a worst case scenario - often it just has a
single message, but it is not guaranteed. When a publish message
contains more than one subsequent message, there is not an indicator
that another message follows.

Perhaps try something like this:

type SPROTO_messages = SPROTO_message[]
&until($input.length() == 0); # or some appropriate terminating condition

Type SPROTO_message = record {
    thdr : uint8;
    hdrlen : uint8;
    variable_header : case msg_type of {
        SPROTO_CONNECT -> connect_packet : SPROTO_connect(hdrlen);
        SPROTO_SUBSCRIBE -> subscribe_packet : SPROTO_subscribe(hdrlen);
        SPROTO_SUBACK -> suback_packet : SPROTO_suback(hdrlen);
        SPROTO_PUBLISH -> publish_packet : SPROTO_publish(hdrlen);
        SPROTO_UNSUBSCRIBE -> unsubscribe_packet : SPROTO_unsubscribe(hdrlen);
        default -> none : empty;
    };
} &let {
    msg_type : uint8 = (thdr >> 4);
};

Mark

#3