From a9a930f77ff5e7ded8c34e21a382d206d58ee7cf Mon Sep 17 00:00:00 2001
From: green <green@FreeBSD.org>
Date: Sun, 11 Jul 1999 18:32:46 +0000
Subject: Two new sysctls: net.inet.tcp.getcred and net.inet.udp.getcred. These
 take a sockaddr_in[2] (local, then remote) and return a struct ucred. Example
 code for these is at: 	http://www.FreeBSD.org/~green/inetd_ident.patch 
 http://www.FreeBSD.org/~green/freebsd4.c (for pidentd)

Reviewed by:	bde
---
 sys/netinet/tcp_subr.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

(limited to 'sys/netinet/tcp_subr.c')

diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
index 2dcee7b..adc4ac9 100644
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)tcp_subr.c	8.2 (Berkeley) 5/24/95
- *	$Id: tcp_subr.c,v 1.55 1999/06/16 19:05:17 tegge Exp $
+ *	$Id: tcp_subr.c,v 1.56 1999/07/05 08:46:55 msmith Exp $
  */
 
 #include "opt_compat.h"
@@ -43,6 +43,7 @@
 #include <sys/sysctl.h>
 #include <sys/malloc.h>
 #include <sys/mbuf.h>
+#include <sys/proc.h>
 #include <sys/socket.h>
 #include <sys/socketvar.h>
 #include <sys/protosw.h>
@@ -587,6 +588,37 @@ tcp_pcblist SYSCTL_HANDLER_ARGS
 SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
 	    tcp_pcblist, "S,xtcpcb", "List of active TCP connections");
 
+static int
+tcp_getcred SYSCTL_HANDLER_ARGS
+{
+	struct sockaddr_in addrs[2];
+	struct inpcb *inp;
+	int error, s;
+
+	error = suser(req->p);
+	if (error)
+		return (error);
+	error = SYSCTL_IN(req, addrs, sizeof(addrs));
+	if (error)
+		return (error);
+	s = splnet();
+	inp = in_pcblookup_hash(&tcbinfo, addrs[1].sin_addr, addrs[1].sin_port,
+	    addrs[0].sin_addr, addrs[0].sin_port, 0);
+	if (inp == NULL || inp->inp_socket == NULL ||
+	    inp->inp_socket->so_cred == NULL) {
+		error = ENOENT;
+		goto out;
+	}
+	error = SYSCTL_OUT(req, inp->inp_socket->so_cred->pc_ucred,
+	    sizeof(struct ucred));
+out:
+	splx(s);
+	return (error);
+}
+
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
+    0, 0, tcp_getcred, "S,ucred", "Get the ucred of a TCP connection");
+
 void
 tcp_ctlinput(cmd, sa, vip)
 	int cmd;
-- 
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