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SCTP: Allow ADD_IP to work with AUTH for backward compatibility.

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This patch adds a tunable that will allow ADD_IP to work without
AUTH for backward compatibility.  The default value is off since
the default value for ADD_IP is off as well.  People who need
to use ADD-IP with older implementations take risks of connection
hijacking and should consider upgrading or turning this tunable on.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
This commit is contained in:
Vlad Yasevich 2007-10-24 17:24:26 -04:00
parent 88799fe5ec
commit 73d9c4fd1a
5 changed files with 21 additions and 3 deletions
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4
net/sctp/sm_make_chunk.c
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@ -2137,8 +2137,10 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
/* If the peer claims support for ADD-IP without support
* for AUTH, disable support for ADD-IP.
* Do this only if backward compatible mode is turned off.
*/
if (asoc->peer.asconf_capable && !asoc->peer.auth_capable) {
if (!sctp_addip_noauth &&
(asoc->peer.asconf_capable && !asoc->peer.auth_capable)) {
asoc->peer.addip_disabled_mask |= (SCTP_PARAM_ADD_IP |
SCTP_PARAM_DEL_IP |
SCTP_PARAM_SET_PRIMARY);