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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2008-09-04 07:30:19 +0200
committerGerrit Renker <gerrit@erg.abdn.ac.uk>2008-09-04 07:45:27 +0200
commit71bb49596bbf4e5a3328e1704d18604e822ba181 (patch)
tree75f64f2f0fea482efc3bdcac407ab187d9e78b5a /net/dccp/proto.c
parent86349c8d9c6892b57aff4549256ab1aa65aed0f0 (diff)
downloadop-kernel-dev-71bb49596bbf4e5a3328e1704d18604e822ba181.zip
op-kernel-dev-71bb49596bbf4e5a3328e1704d18604e822ba181.tar.gz
dccp: Query supported CCIDs
This provides a data structure to record which CCIDs are locally supported and three accessor functions: - a test function for internal use which is used to validate CCID requests made by the user; - a copy function so that the list can be used for feature-negotiation; - documented getsockopt() support so that the user can query capabilities. The data structure is a table which is filled in at compile-time with the list of available CCIDs (which in turn depends on the Kconfig choices). Using the copy function for cloning the list of supported CCIDs is useful for feature negotiation, since the negotiation is now with the full list of available CCIDs (e.g. {2, 3}) instead of the default value {2}. This means negotiation will not fail if the peer requests to use CCID3 instead of CCID2. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Diffstat (limited to 'net/dccp/proto.c')
-rw-r--r--net/dccp/proto.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 01332fe..b4b10cb 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -649,6 +649,8 @@ static int do_dccp_getsockopt(struct sock *sk, int level, int optname,
case DCCP_SOCKOPT_GET_CUR_MPS:
val = dp->dccps_mss_cache;
break;
+ case DCCP_SOCKOPT_AVAILABLE_CCIDS:
+ return ccid_getsockopt_builtin_ccids(sk, len, optval, optlen);
case DCCP_SOCKOPT_SERVER_TIMEWAIT:
val = dp->dccps_server_timewait;
break;
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