Module Name:	src
Committed By:	dyoung
Date:		Wed Sep 19 04:33:45 UTC 2007

Modified Files:
	src/sys/kern: uipc_domain.c uipc_socket.c uipc_syscalls.c
	src/sys/netinet: in.h in_pcb.h in_proto.c ip_output.c raw_ip.c
	    tcp_usrreq.c
	src/sys/netinet6: icmp6.c in6_proto.c ip6_output.c raw_ip6.c
	src/sys/sys: domain.h socket.h socketvar.h

Log Message:
1) Introduce a new socket option, (SOL_SOCKET, SO_NOHEADER), that
   tells a socket that it should both add a protocol header to tx'd
   datagrams and remove the header from rx'd datagrams:

        int onoff = 1, s = socket(...);
        setsockopt(s, SOL_SOCKET, SO_NOHEADER, &onoff);

2) Add an implementation of (SOL_SOCKET, SO_NOHEADER) for raw IPv4
   sockets.

3) Reorganize the protocols' pr_ctloutput implementations a bit.
   Consistently return ENOPROTOOPT when an option is unsupported,
   and EINVAL if a supported option's arguments are incorrect.
   Reorganize the flow of code so that it's more clear how/when
   options are passed down the stack until they are handled.

   Shorten some pr_ctloutput staircases for readability.

4) Extract common mbuf code into subroutines, add new sockaddr
   methods, and introduce a new subroutine, fsocreate(), for reuse
   later; use it first in sys_socket():

struct mbuf *m_getsombuf(struct socket *so)

        Create an mbuf and make its owner the socket `so'.

struct mbuf *m_intopt(struct socket *so, int val)

        Create an mbuf, make its owner the socket `so', put the
        int `val' into it, and set its length to sizeof(int).

int fsocreate(..., int *fd)

        Create a socket, a la socreate(9), put the socket into the
        given LWP's descriptor table, return the descriptor at `fd'
        on success.

void *sockaddr_addr(struct sockaddr *sa, socklen_t *slenp)
const void *sockaddr_const_addr(const struct sockaddr *sa, socklen_t *slenp)

        Extract a pointer to the address part of a sockaddr.  Write
        the length of the address  part at `slenp', if `slenp' is
        not NULL.

socklen_t sockaddr_getlen(const struct sockaddr *sa)

        Return the length of a sockaddr.  This just evaluates to
        sa->sa_len.  I only add this for consistency with code that
        appears in a portable userland library that I am going to
        import.

const struct sockaddr *sockaddr_any(const struct sockaddr *sa)

        Return the "don't care" sockaddr in the same family as
        `sa'.  This is the address a client should sobind(9) if it
        does not care the source address and, if applicable, the
        port et cetera that it uses.

const void *sockaddr_anyaddr(const struct sockaddr *sa, socklen_t *slenp)

        Return the "don't care" sockaddr in the same family as
        `sa'.  This is the address a client should sobind(9) if it
        does not care the source address and, if applicable, the
        port et cetera that it uses.


To generate a diff of this commit:
cvs rdiff -r1.70 -r1.71 src/sys/kern/uipc_domain.c
cvs rdiff -r1.141 -r1.142 src/sys/kern/uipc_socket.c
cvs rdiff -r1.119 -r1.120 src/sys/kern/uipc_syscalls.c
cvs rdiff -r1.80 -r1.81 src/sys/netinet/in.h
cvs rdiff -r1.42 -r1.43 src/sys/netinet/in_pcb.h
cvs rdiff -r1.88 -r1.89 src/sys/netinet/in_proto.c
cvs rdiff -r1.183 -r1.184 src/sys/netinet/ip_output.c
cvs rdiff -r1.99 -r1.100 src/sys/netinet/raw_ip.c
cvs rdiff -r1.136 -r1.137 src/sys/netinet/tcp_usrreq.c
cvs rdiff -r1.136 -r1.137 src/sys/netinet6/icmp6.c
cvs rdiff -r1.78 -r1.79 src/sys/netinet6/in6_proto.c
cvs rdiff -r1.120 -r1.121 src/sys/netinet6/ip6_output.c
cvs rdiff -r1.86 -r1.87 src/sys/netinet6/raw_ip6.c
cvs rdiff -r1.26 -r1.27 src/sys/sys/domain.h
cvs rdiff -r1.88 -r1.89 src/sys/sys/socket.h
cvs rdiff -r1.98 -r1.99 src/sys/sys/socketvar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.