usr/src/lib/libc/port/gen/klpdlib.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include "lint.h"
  30 #include "priv_private.h"
  31 #include "mtlib.h"
  32 #include "libc.h"
  33 #include <door.h>
  34 #include <errno.h>
  35 #include <priv.h>
  36 #include <klpd.h>
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <sys/klpd.h>
  41 #include <sys/param.h>
  42 #include <sys/syscall.h>
  43 #include <unistd.h>
  44 #include <netinet/in.h>
  45
  46 typedef struct klpd_data {
  47         boolean_t       (*kd_callback)(void *, const priv_set_t *, void *);
  48         void            *kd_user_cookie;
  49         int             kd_doorfd;
  50 } klpd_data_t;
  51
  52 typedef struct klpd_ctxt {
  53         klpd_data_t     *kc_data;
  54         char            *kc_path;
  55         int             kc_int;
  56         int             kc_type;
  57 } klpd_ctxt_t;
  58
  59 /* ARGSUSED */
  60 static void
  61 klpd_door_callback(void *kd_cookie, char *argp, size_t arg_size,
  62     door_desc_t *dp, uint_t ndesc)
  63 {
  64         klpd_data_t *p = kd_cookie;
  65         int res;
  66         klpd_ctxt_t ctx;
  67         klpd_head_t *klh;
  68         klpd_arg_t *ka;
  69         priv_set_t *pset;
  70
  71         if (argp == DOOR_UNREF_DATA) {
  72                 (void) p->kd_callback(p->kd_user_cookie, NULL, NULL);
  73                 (void) door_return(NULL, 0, NULL, 0);
  74         }
  75
  76         klh = (void *)argp;
  77         ka = KLH_ARG(klh);
  78         pset = KLH_PRIVSET(klh);
  79
  80         ctx.kc_type = ka == NULL ? KLPDARG_NONE : ka->kla_type;
  81
  82         switch (ctx.kc_type) {
  83         case KLPDARG_NONE:
  84                 ctx.kc_path = NULL;
  85                 ctx.kc_int = -1;
  86                 break;
  87         case KLPDARG_VNODE:
  88                 ctx.kc_path = ka->kla_str;
  89                 ctx.kc_int = -1;
  90                 break;
  91         default:
  92                 ctx.kc_int = ka->kla_int;
  93                 ctx.kc_path = NULL;
  94                 break;
  95         }
  96
  97         ctx.kc_data = p;
  98
  99         if (p->kd_callback(p->kd_user_cookie, pset, &ctx))
 100                 res = 0;
 101         else
 102                 res = 1;
 103
 104         (void) door_return((char *)&res, sizeof (res), NULL, 0);
 105 }
 106
 107 void *
 108 klpd_create(boolean_t (*callback)(void *, const priv_set_t *, void *),
 109     void *cookie)
 110 {
 111         klpd_data_t *p = malloc(sizeof (klpd_data_t));
 112
 113         if (p == NULL)
 114                 return (NULL);
 115
 116         p->kd_doorfd = door_create(klpd_door_callback, p,
 117             DOOR_REFUSE_DESC | DOOR_UNREF);
 118         if (p->kd_doorfd == -1)
 119                 goto out;
 120
 121         p->kd_user_cookie = cookie;
 122         p->kd_callback = callback;
 123
 124         return (p);
 125
 126 out:
 127         free(p);
 128         return (NULL);
 129 }
 130
 131 int
 132 klpd_register_id(const priv_set_t *set, void *handle, idtype_t type, id_t id)
 133 {
 134         klpd_data_t *p = handle;
 135         priv_data_t *d;
 136
 137         LOADPRIVDATA(d);
 138
 139         /* We really need to have the privilege set as argument here */
 140         if (syscall(SYS_privsys, PRIVSYS_KLPD_REG, p->kd_doorfd, id,
 141             set, d->pd_setsize, type) == -1)
 142                 return (-1);
 143
 144         /* Registration for the current process?  Then do the thing. */
 145         if (type == P_PID && (id == 0 || (pid_t)id == getpid())) {
 146                 (void) setppriv(PRIV_OFF, PRIV_INHERITABLE, set);
 147                 (void) setpflags(PRIV_XPOLICY, 1);
 148         }
 149         return (0);
 150 }
 151
 152 int
 153 klpd_register(const priv_set_t *set, void *handle)
 154 {
 155         return (klpd_register_id(set, handle, P_PID, -1));
 156 }
 157
 158 int
 159 klpd_unregister_id(void *handle, idtype_t type, id_t id)
 160 {
 161         klpd_data_t *p = handle;
 162         int err;
 163
 164         err = syscall(SYS_privsys, PRIVSYS_KLPD_UNREG, p->kd_doorfd, id,
 165             NULL, 0L, type);
 166         if (close(p->kd_doorfd) != 0)
 167                 err = -1;
 168         free(p);
 169         return (err);
 170 }
 171
 172 int
 173 klpd_unregister(void *handle)
 174 {
 175         return (klpd_unregister_id(handle, P_PID, -1));
 176 }
 177
 178 const char *
 179 klpd_getpath(void *context)
 180 {
 181         klpd_ctxt_t *p = context;
 182
 183         if (p->kc_type != KLPDARG_VNODE)
 184                 errno = EINVAL;
 185         return (p->kc_path);
 186 }
 187
 188 int
 189 klpd_getport(void *context, int *proto)
 190 {
 191         klpd_ctxt_t *p = context;
 192
 193         switch (p->kc_type) {
 194         case KLPDARG_TCPPORT:
 195                 *proto = IPPROTO_TCP;
 196                 break;
 197         case KLPDARG_UDPPORT:
 198                 *proto = IPPROTO_UDP;
 199                 break;
 200         case KLPDARG_SCTPPORT:
 201                 *proto = IPPROTO_SCTP;
 202                 break;
 203         case KLPDARG_SDPPORT:
 204                 *proto = PROTO_SDP;
 205                 break;
 206         default:
 207                 errno = EINVAL;
 208                 return (-1);
 209         }
 210         return (p->kc_int);
 211 }
 212
 213 /*ARGSUSED*/
 214 int
 215 klpd_getucred(ucred_t **uc, void *context)
 216 {
 217         return (door_ucred(uc));
 218 }