Struct cmsghdr

Interface status:

externallyDefinedApi

struct cmsghdr;

Description

Header for ancillary data objects in msg_control buffer. Used for additional information with/about a datagram not expressible by flags. The format is a sequence of message elements headed by cmsghdr structures.

Members

Defined in cmsghdr:

• cmsg_lendata byte count, including hdr
• cmsg_leveloriginating protocol
• cmsg_typeprotocol-specific type

Interface status:

externallyDefinedApi

Inherited from: cmsghdr

socklen_t cmsg_len;

Description

data byte count, including hdr

Interface status:

externallyDefinedApi

Inherited from: cmsghdr

int cmsg_level;

Description

originating protocol

Interface status:

externallyDefinedApi

Inherited from: cmsghdr

int cmsg_type;

Description

protocol-specific type