Geir Ola Vaagland 6b3fd5f3a2
net: sctp: implement rfc6458, 8.1.31. SCTP_DEFAULT_SNDINFO support ...
This patch implements section 8.1.31. of RFC6458, which adds support
for setting/retrieving SCTP_DEFAULT_SNDINFO:
Applications that wish to use the sendto() system call may wish
to specify a default set of parameters that would normally be
supplied through the inclusion of ancillary data. This socket
option allows such an application to set the default sctp_sndinfo
structure. The application that wishes to use this socket option
simply passes the sctp_sndinfo structure (defined in Section 5.3.4)
to this call. The input parameters accepted by this call include
snd_sid, snd_flags, snd_ppid, and snd_context. The snd_flags
parameter is composed of a bitwise OR of SCTP_UNORDERED, SCTP_EOF,
and SCTP_SENDALL. The snd_assoc_id field specifies the association
to which to apply the parameters. For a one-to-many style socket,
any of the predefined constants are also allowed in this field.
The field is ignored for one-to-one style sockets.
Joint work with Daniel Borkmann.
Signed-off-by: Geir Ola Vaagland <geirola@gmail.com >
Signed-off-by: Daniel Borkmann <dborkman@redhat.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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