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##Pipes/Tunnels
##pipe tunnel nested series
##Sometimes one would like to express that a set of messages go in a tunnel. Use the 'pipe' keyword instead of 'box' to turn a box into a pipe. You can create pipe series or nest pipes. (For pipe series it is common to add content to only one of the segments. The '[]' symbol to terminate the label of the first segment.) By default pipes are semi-transparent, but you can change this using the 'solid' attribute (0 is fully transparent, 255 is fully opaque).
C: Client;
R1: Router;
R2: Router;
S: Server;
->C: Hit;
C==C: Generate\nrequest;
pipe R1--R2: Tunnel {
C=>S: Request;
};
S--S: Set up\nmore tunnels;
pipe R1--R2: Segment 1 []
R2==S: Segment 2
{
C<=S:Response;
};
pipe R1--R2: Outer
[solid=255, color=green] {
pipe C++S: \plInner
[color=red] {
C<=>: \prSome message;
};
};
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