On Tue, 14 Dec 2004, Paul Starzetz wrote: > The Linux kernel provides a powerful socket API to user applications. > Among other functions sockets provide an universal way for IPC and user- > kernel communication. The socket layer uses several logical sublayers. > One of the layers, so called auxiliary message layer (or scm layer), > augments the socket API by an universal user-kernel message passing > capability (see recvfrom(2) for more details on auxiliary messages). More nasties might be lurking nearby (at least in 2.4): - additional, almost identical, copies of cmsg parsing code appear in ip_cmsg_send() (net/ipv4/ip_sockglue.c) and datagram_send_ctl() (net/ipv6/datagram.c) - sys_sendmsg() (net/socket.c) is willing to allocate almost arbitrary large blocks of kernel memory --Pavel Kankovsky aka Peak [ Boycott Microsoft--http://www.vcnet.com/bms ] "Resistance is futile. Open your source code and prepare for assimilation."
