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dccp: send Confirm options only once

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If a connection is in the OPEN state, remove feature negotiation Confirm
options from the list of options after sending them once; as such options
are NOT supposed to be retransmitted and are ONLY supposed to be sent in
response to a Change option (RFC 4340 6.2).

Signed-off-by: Samuel Jero <sj323707@ohio.edu>
Acked-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
This commit is contained in:
Samuel Jero 2011-07-24 21:06:37 -06:00 committed by Gerrit Renker
parent 44e6fd9e67
commit a6444f4237
1 changed files with 16 additions and 5 deletions
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21
net/dccp/feat.c
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@ -665,11 +665,22 @@ int dccp_feat_insert_opts(struct dccp_sock *dp, struct dccp_request_sock *dreq,
return -1;
if (pos->needs_mandatory && dccp_insert_option_mandatory(skb))
return -1;
/*
* Enter CHANGING after transmitting the Change option (6.6.2).
*/
if (pos->state == FEAT_INITIALISING)
pos->state = FEAT_CHANGING;
if (skb->sk->sk_state == DCCP_OPEN &&
(opt == DCCPO_CONFIRM_R || opt == DCCPO_CONFIRM_L)) {
/*
* Confirms don't get retransmitted (6.6.3) once the
* connection is in state OPEN
*/
dccp_feat_list_pop(pos);
} else {
/*
* Enter CHANGING after transmitting the Change
* option (6.6.2).
*/
if (pos->state == FEAT_INITIALISING)
pos->state = FEAT_CHANGING;
}
}
return 0;
}