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Correctie.

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Guus Sliepen 2001-07-22 15:25:13 +00:00
parent d7b4de0e73
commit 995ab86fce
1 changed files with 69 additions and 8 deletions
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doc/CONNECTIVITY
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@ -12,7 +12,7 @@ maintain a stable network.
provided that the entire resulting derived work is distributed
under the terms of a permission notice identical to this one.
$Id: CONNECTIVITY,v 1.1.2.3 2001/07/22 14:58:18 guus Exp $
$Id: CONNECTIVITY,v 1.1.2.4 2001/07/22 15:25:13 guus Exp $
1. Problem
==========
@ -65,26 +65,34 @@ After A---D authentication finishes the following actions are taken:
D sends ADD_HOST(E) to A
D sends ADD_HOST(F) to A
2 A receives ADD_HOST(E) from D:
2 A sends ADD_HOST(D) to B
A receives ADD_HOST(E) from D:
A sends ADD_HOST(E) to B
A receives ADD_HOST(F) from D:
A sends ADD_HOST(F) to B
D sends ADD_HOST(A) to E
D receives ADD_HOST(B) from A:
D sends ADD_HOST(B) to E
D receives ADD_HOST(C) from A:
D sends ADD_HOST(C) to E
3 B receives ADD_HOST(E) from A:
3 B receives ADD_HOST(D) from A,
B sends ADD_HOST(D) to C
B receives ADD_HOST(E) from A:
B sends ADD_HOST(E) to C
B receives ADD_HOST(F) from A:
B sends ADD_HOST(F) to C
E receives ADD_HOST(A) from D:
E sends ADD_HOST(A) to F
E receives ADD_HOST(B) from D:
E sends ADD_HOST(B) to F
E receives ADD_HOST(C) from D:
E sends ADD_HOST(C) to F
4 C receives ADD_HOST(E) from B.
4 C receives ADD_HOST(D) from B.
C receives ADD_HOST(E) from B.
C receives ADD_HOST(F) from B.
F receives ADD_HOST(A) from E.
F receives ADD_HOST(B) from E.
F receives ADD_HOST(C) from E.
@ -108,25 +116,31 @@ Then C---F authentication finishes, the following actions are taken:
F sends ADD_HOST(D) to C
F sends ADD_HOST(E) to C
2 A receives ADD_HOST(E) from D:
2 A sends ADD_HOST(D) to B
A receives ADD_HOST(E) from D:
A sends ADD_HOST(E) to B
A receives ADD_HOST(F) from D:
A sends ADD_HOST(F) to B
D sends ADD_HOST(A) to E
D receives ADD_HOST(B) from A:
D sends ADD_HOST(B) to E
D receives ADD_HOST(C) from A:
D sends ADD_HOST(C) to E
C sends ADD_HOST(F) to B
C receives ADD_HOST(D) from F:
A sends ADD_HOST(D) to B
C receives ADD_HOST(E) from F:
A sends ADD_HOST(E) to B
F sends ADD_HOSTS(C) to E
F receives ADD_HOST(A) from C:
D sends ADD_HOST(A) to E
F receives ADD_HOST(B) from C:
D sends ADD_HOST(B) to E
3 B receives ADD_HOST(E) from A:
3 B receives ADD_HOST(D) from A,
B sends ADD_HOST(D) to C
B receives ADD_HOST(E) from A:
B sends ADD_HOST(E) to C
B receives ADD_HOST(F) from A:
B sends ADD_HOST(F) to C
@ -134,17 +148,25 @@ Then C---F authentication finishes, the following actions are taken:
E sends ADD_HOST(A) to F
E receives ADD_HOST(B) from D:
E sends ADD_HOST(B) to F
E receives ADD_HOST(C) from D:
E sends ADD_HOST(C) to F
B receives ADD_HOST(F) from C, and notes that is is already known:
<insert solution here>
B receives ADD_HOST(D) from C, and notes that is is already known:
<insert solution here>
B receives ADD_HOST(E) from C, and notes that is is already known:
<insert solution here>
B receives ADD_HOST(F) from C, and notes that is is already known:
E receives ADD_HOST(C) from F, and notes that is is already known:
<insert solution here>
E receives ADD_HOST(A) from F, and notes that is is already known:
<insert solution here>
E receives ADD_HOST(B) from F, and notes that is is already known:
<insert solution here>
4 A receives ADD_HOST(E) from B, and notes that it is already known:
4 A receives ADD_HOST(D) from B, and notes that it is already known:
<insert solution here>
A receives ADD_HOST(E) from B, and notes that it is already known:
<insert solution here>
A receives ADD_HOST(F) from B, and notes that it is already known:
<insert solution here>
@ -152,3 +174,42 @@ Then C---F authentication finishes, the following actions are taken:
<insert solution here>
F receives ADD_HOST(B) from E, and notes that it is already known:
<insert solution here>
F receives ADD_HOST(B) from E, and notes that it is already known:
<insert solution here>
...
1.2.1 Augmenting ADD_HOST
-------------------------
A solution would be to augment ADD_HOST with an extra parameter, for example
the host which told us about the new host. From A's point of view, D told it
about itself, E and F. So, A would send out ADD_HOST(D, D) to B, and
ADD_HOST(E,D) and ADD_HOST(F,D). Lets review what happens at point 3 in the
preceding example:
3 B receives ADD_HOST(D,D) from A,
B sends ADD_HOST(D,D) to C
B receives ADD_HOST(E,D) from A:
B sends ADD_HOST(E,D) to C
B receives ADD_HOST(F,D) from A:
B sends ADD_HOST(F,D) to C
E receives ADD_HOST(A,A) from D:
E sends ADD_HOST(A,A) to F
E receives ADD_HOST(B,A) from D:
E sends ADD_HOST(B,A) to F
E receives ADD_HOST(C,A) from D:
E sends ADD_HOST(C,A) to F
B receives ADD_HOST(F,F) from C, and notes that F is already known:
<insert solution here>
B receives ADD_HOST(D,F) from C, and notes that D is already known:
<insert solution here>
B receives ADD_HOST(E,F) from C, and notes that E is already known:
<insert solution here>
E receives ADD_HOST(C,C) from F, and notes that C is already known:
<insert solution here>
E receives ADD_HOST(A,C) from F, and notes that A is already known:
<insert solution here>
E receives ADD_HOST(B,C) from F, and notes that B is already known:
<insert solution here>