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| author | Gerrit Renker <[email protected]> | 2007-10-04 21:39:22 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2007-10-10 23:54:31 +0000 |
| commit | 7c559a9e44ee61faf2f339604ce708decb345a93 (patch) | |
| tree | 8e0e89521445a42cf801747af20be172b6e9e582 /net/dccp/ccids/ccid2.c | |
| parent | [DCCP]: Wait for CCID (diff) | |
| download | kernel-7c559a9e44ee61faf2f339604ce708decb345a93.tar.gz kernel-7c559a9e44ee61faf2f339604ce708decb345a93.zip | |
[DCCP]: Add socket option to query the current MPS
This enables applications to query the current value of the Maximum
Packet Size via a socket option, suggested as a SHOULD in (RFC 4340,
p. 102).
This socket option is useful to avoid the annoying bail-out via
`-EMSGSIZE'. In particular, as fragmentation is not currently
supported (and its use is partly discouraged in RFC 4340).
With this option, it is possible to size buffers accordingly, e.g.
int buflen = dccp_get_cur_mps(sockfd);
/* or */
if (msgsize > dccp_get_cur_mps(sockfd))
die("message is too large for this path");
Signed-off-by: Gerrit Renker <[email protected]>
Signed-off-by: Ian McDonald <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/dccp/ccids/ccid2.c')
0 files changed, 0 insertions, 0 deletions