Struct msghdr

struct msghdr;

Description

Message header for recvmsg and sendmsg calls. Used value-result for recvmsg, value only for sendmsg.

Members

Defined in msghdr:

• msg_controlancillary data, see below
• msg_controllenancillary data buffer len
• msg_flagsflags on received message
• msg_iovscatter or gather array
• msg_iovlenx elements in msg_iov
• msg_nameoptional address
• msg_namelensize of address

void * msg_name;

Description

optional address

socklen_t msg_namelen;

Description

size of address

iovec * msg_iov;

Description

scatter or gather array

int msg_iovlen;

Description

x elements in msg_iov

void * msg_control;

Description

ancillary data, see below

socklen_t msg_controllen;

Description

ancillary data buffer len

int msg_flags;

Description

flags on received message