1 .PS

2 # ipc-protocol

3

4 boxwid = 0.3

5 boxht = 0.3

6

7 linewid = 0.8

8

9

10 B: box "B"

11 arrow linewid*1.3 "connection" "attempt"

12

13 W1: box "W"

14 arrow linewid/2 dashed "0" ""

15 box ""

16 arrow "header" "transfer"

17

18 W2: box "W"

19 arrow linewid/2 dashed "0" ""

20 box ""

21 arrow "body" "transfer"

22

23 W3: box "W"

24 arrow linewid/2 dashed "0" ""

25

26 S: box "S"

27

28 down

29 arrow dashed down from W1.s " 1"

30 box "E"

31

32 arrow dashed down from W2.s " 1"

33 box "E"

34

35 arrow dashed down from W3.s " 1"

36 box "E"

37

38

39 "\fI" "B: begin" ljust "W: wait for reply" ljust "E: error" ljust "S: success" ljust "\fR" at B.sw -(0,0.5)

40

41 .PE