recvmsg
POSIX.1-2001, POSIX.1-2008, 4.4BSD (these interfaces first appeared in 4.2BSD). POSIX.1 describes only the MSG_OOB, MSG_PEEK, and MSG_WAITALL flags.
POSIX.1 describes only the MSG_OOB, MSG_PEEK, and MSG_WAITALL flags.
MSG_OOB
MSG_PEEK
MSG_WAITALL