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Hello David/else,
   A rough cut attempt at the following is attached. It atleast does address
a few data link functions.

Kindly comment/criticize.

truely
dheeraj

PS: I realize that one of the files is not related.
On Sun, Mar 20, 2005 at 01:24:29AM -0600, David Young wrote:

> On Sat, Mar 12, 2005 at 02:04:26PM -0500, Dheeraj S wrote:
> > Hello all,
> >    Is is possible to create sockets in the AF_LINK/PF_LINK family ?
> > for example,
> >         socket(PF_LINK, SOCK_DGRAM/SOCK_RAW, 0).
> 
> Not yet.  It is a very desirable feature, to me.  Do you think you will
> send a patch?
> 
> Dave


-- 
"Nature wants us to react, return blow for blow, cheating for cheating, lie for
lie, and then it requires a Divine power not to hit-back, keep control and 
remain unattached, and act with prudence." 

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Content-Disposition: attachment; filename="patch-dlsock.txt"

--- /dev/null	2005-03-25 05:20:57.000000000 -0500
+++ net/dlsock.c	2005-03-25 05:18:08.000000000 -0500
@@ -0,0 +1,110 @@
+/*
+	Copyright	Dheeraj Reddy. dheeraj@ece.gatech.edu
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/domain.h>
+#include <sys/protosw.h>
+
+#include <net/if.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/in.h>
+#include <netinet/in_pcb.h>
+
+
+DOMAIN_DEFINE(dltdomain);
+
+struct sockproto dlt_proto = {PF_LINK, };
+
+void	dlt_init (void);
+void	dlt_input (struct mbuf *, ...);
+int	dlt_ctloutput (int, struct socket*, int, int, struct mbuf**);
+int	dlt_usrreq (struct socket*,
+	     int, struct mbuf*, struct mbuf*, struct mbuf*, struct proc* );
+int	dlt_output (struct mbuf *, ...);
+
+struct	inpcbtable dltbtable;
+int     dltbhashsize = 64;
+
+void	dlt_init (void)
+{
+	in_pcbinit(&dltbtable, dltbhashsize, dltbhashsize);
+}
+
+void	dlt_input (struct mbuf *m, ...)
+{
+}
+
+int	dlt_ctloutput(int cmd, struct socket *sock, int i, int j, 
+		struct mbuf** m)
+{
+	return 0;
+}
+
+int	dlt_usrreq(struct socket *so, int req, struct mbuf *cmd, 
+		struct mbuf *data_, struct mbuf *ifp_, struct proc *p)
+{
+	struct inpcb *inp;
+	struct ifnet *ifp = (struct ifnet*)(ifp_);
+	caddr_t data = (caddr_t)(data_);
+	int retval = 0;
+	int s;
+
+	s = splsoftnet();
+	inp = sotoinpcb(so);
+
+	switch (req) {
+	
+	case PRU_ATTACH:
+		if (inp !=0 ) {
+			retval = EISCONN;
+			break;
+		}
+		retval = in_pcballoc(so, &dltbtable);
+		if (retval)
+			break;
+		inp = sotoinpcb(so);
+		break;
+
+	case PRU_DETACH:
+		in_pcbdetach(inp);
+		break;
+
+	case PRU_CONTROL:
+		retval = ifp->if_ioctl(ifp, (u_long)cmd, data);
+		break;
+
+	default:
+		retval = EOPNOTSUPP;
+	}
+		
+	splx(s);
+	return retval;
+}
+
+int	dlt_output (struct mbuf *m, ...)
+{
+	return (EOPNOTSUPP);
+}
+
+const struct protosw dltsw[] = {
+{
+	SOCK_DGRAM,	&dltdomain,	0,	PR_ATOMIC|PR_ADDR,
+	dlt_input,	dlt_output,	0,	dlt_ctloutput,
+	dlt_usrreq,
+	dlt_init,	0,		0,	0,
+} };
+
+struct domain dltdomain = {
+	PF_LINK, "dlt", 0, 0, 0,
+	dltsw, &dltsw[sizeof(dltsw)/sizeof(dltsw[0])]
+};

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Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment; filename="patch-conf-files.txt"

--- conf/files	2005-03-25 05:27:49.000000000 -0500
+++ conf/files.new	2005-03-25 05:27:20.000000000 -0500
@@ -137,6 +137,7 @@
 include "netns/files.netns"
 include "netsmb/files.netsmb"
 include "net/files.pf"
+include "net80211/files.net80211"
 
 defflag				IPX		# IPX network stack
 defflag				PFIL_HOOKS	# pfil(9)
@@ -1326,17 +1327,9 @@
 file	net/raw_usrreq.c
 file	net/route.c
 file	net/rtsock.c
+file	net/dlsock.c
 file	net/slcompress.c		sl | ppp | strip | (irip & irip_vj)
 file	net/zlib.c			(ppp & ppp_deflate) | ipsec | opencrypto
-file	net80211/ieee80211.c		wlan
-file	net80211/ieee80211_compat.c	wlan
-file	net80211/ieee80211_crypto.c	wlan
-file	net80211/ieee80211_input.c	wlan
-file	net80211/ieee80211_ioctl.c	wlan
-file	net80211/ieee80211_node.c	wlan
-file	net80211/ieee80211_output.c	wlan
-file	net80211/ieee80211_proto.c	wlan
-file	net80211/ieee80211_rssadapt.c	wlan
 file	netinet/if_arp.c		arp | netatalk		needs-flag
 file	netinet/if_atm.c		atm
 file	netinet/in_gif.c		gif & inet

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Content-Disposition: attachment; filename="patch-net80211.txt"

--- /dev/null	2005-03-24 19:42:51.000000000 -0500
+++ net80211/files.net80211	2005-03-24 19:57:45.000000000 -0500
@@ -0,0 +1,10 @@
+
+file	net80211/ieee80211.c		wlan
+file	net80211/ieee80211_compat.c	wlan
+file	net80211/ieee80211_crypto.c	wlan
+file	net80211/ieee80211_input.c	wlan
+file	net80211/ieee80211_ioctl.c	wlan
+file	net80211/ieee80211_node.c	wlan
+file	net80211/ieee80211_output.c	wlan
+file	net80211/ieee80211_proto.c	wlan
+file	net80211/ieee80211_rssadapt.c	wlan

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