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      1 /*	$NetBSD: uipc_usrreq_70.c,v 1.5 2019/12/12 02:15:42 pgoyette Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2016 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Roy Marples.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: uipc_usrreq_70.c,v 1.5 2019/12/12 02:15:42 pgoyette Exp $");
     34 
     35 #if defined(_KERNEL_OPT)
     36 #include "opt_compat_netbsd.h"
     37 #endif
     38 
     39 #include <sys/param.h>
     40 #include <sys/lwp.h>
     41 #include <sys/socket.h>
     42 #include <sys/socketvar.h>
     43 #include <sys/unpcb.h>
     44 #include <sys/mbuf.h>
     45 #include <sys/kauth.h>
     46 #include <sys/compat_stub.h>
     47 
     48 #include <compat/sys/socket.h>
     49 
     50 struct mbuf *
     51 compat_70_unp_addsockcred(struct lwp *l, struct mbuf *control)
     52 {
     53 	struct sockcred70 *sc;
     54 	struct mbuf *m;
     55 	void *p;
     56 
     57 	m = sbcreatecontrol1(&p, SOCKCRED70SIZE(kauth_cred_ngroups(l->l_cred)),
     58 		SCM_OCREDS, SOL_SOCKET, M_WAITOK);
     59 	if (m == NULL) {
     60 		return control;
     61 	}
     62 
     63 	sc = p;
     64 	sc->sc_uid = kauth_cred_getuid(l->l_cred);
     65 	sc->sc_euid = kauth_cred_geteuid(l->l_cred);
     66 	sc->sc_gid = kauth_cred_getgid(l->l_cred);
     67 	sc->sc_egid = kauth_cred_getegid(l->l_cred);
     68 	sc->sc_ngroups = kauth_cred_ngroups(l->l_cred);
     69 
     70 	for (int i = 0; i < sc->sc_ngroups; i++)
     71 		sc->sc_groups[i] = kauth_cred_group(l->l_cred, i);
     72 
     73 	return m_add(control, m);
     74 }
     75 
     76 void
     77 uipc_usrreq_70_init(void)
     78 {
     79 
     80 	MODULE_HOOK_SET(uipc_unp_70_hook, compat_70_unp_addsockcred);
     81 }
     82 
     83 void
     84 uipc_usrreq_70_fini(void)
     85 {
     86 
     87 	MODULE_HOOK_UNSET(uipc_unp_70_hook);
     88 }
     89