kernel/net/sockmods/sdp/sockmod_sdp.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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #include <sys/sysmacros.h>
  27 #include <sys/strsubr.h>
  28 #include <sys/socket.h>
  29 #include <sys/socketvar.h>
  30 #include <sys/modctl.h>
  31 #include <sys/cmn_err.h>
  32 #include <sys/vfs.h>
  33 #include <inet/sdp_itf.h>
  34 #include <../../../../kernel/fs/sockfs/sockcommon.h>
  35 #include "socksdp.h"
  36
  37 struct sonode *socksdp_create(struct sockparams *, int, int, int,
  38     int, int *, cred_t *);
  39 static void socksdp_destroy(struct sonode *);
  40
  41 static __smod_priv_t sosdp_priv = {
  42         socksdp_create,
  43         socksdp_destroy,
  44         NULL
  45 };
  46
  47 static smod_reg_t sinfo = {
  48         SOCKMOD_VERSION,
  49         "socksdp",
  50         SOCK_UC_VERSION,
  51         SOCK_DC_VERSION,
  52         NULL,
  53         &sosdp_priv
  54 };
  55
  56 /*
  57  * Module linkage information for the kernel
  58  */
  59 static struct modlsockmod modlsockmod = {
  60         &mod_sockmodops, "SDP socket module", &sinfo
  61 };
  62
  63 static struct modlinkage modlinkage = {
  64         MODREV_1,
  65         &modlsockmod,
  66         NULL
  67 };
  68
  69 /*
  70  * Creates a sdp socket data structure.
  71  */
  72 /* ARGSUSED */
  73 struct sonode *
  74 socksdp_create(struct sockparams *sp, int family, int type, int protocol, int
  75     sflags, int *errorp, cred_t *cr)
  76 {
  77         struct sonode *so;
  78         int kmflags = (sflags & SOCKET_NOSLEEP) ? KM_NOSLEEP : KM_SLEEP;
  79
  80         dprint(4, ("Inside sosdp_create: domain:%d proto:%d type:%d",
  81             family, protocol, type));
  82
  83         *errorp = 0;
  84
  85         /*
  86          * We only support one type of SDP socket.  Let sotpi_create()
  87          * handle all other cases, such as raw socket.
  88          */
  89         if (!(family == AF_INET || family == AF_INET6) ||
  90             !(type == SOCK_STREAM)) {
  91                 *errorp = EINVAL;
  92                 return (NULL);
  93         }
  94
  95         so = kmem_cache_alloc(socket_cache, kmflags);
  96         if (so == NULL) {
  97                 *errorp = ENOMEM;
  98                 return (NULL);
  99         }
 100
 101         sonode_init(so, sp, family, type, protocol, &sosdp_sonodeops);
 102         so->so_pollev |= SO_POLLEV_ALWAYS;
 103
 104         dprint(2, ("sosdp_create: %p domain %d type %d\n", (void *)so, family,
 105             type));
 106
 107         so->so_is_stream = false;
 108
 109         /*
 110          * set the default values to be INFPSZ
 111          * if a protocol desires it can change the value later
 112          */
 113         so->so_proto_props.sopp_rxhiwat = SOCKET_RECVHIWATER;
 114         so->so_proto_props.sopp_rxlowat = SOCKET_RECVLOWATER;
 115         so->so_proto_props.sopp_maxpsz = INFPSZ;
 116         so->so_proto_props.sopp_maxblk = INFPSZ;
 117
 118         return (so);
 119 }
 120
 121 static void
 122 socksdp_destroy(struct sonode *so)
 123 {
 124         ASSERT(so->so_ops == &sosdp_sonodeops);
 125
 126         sosdp_fini(so, CRED());
 127
 128         kmem_cache_free(socket_cache, so);
 129 }
 130
 131 int
 132 _init(void)
 133 {
 134         return (mod_install(&modlinkage));
 135 }
 136
 137 int
 138 _fini(void)
 139 {
 140         return (mod_remove(&modlinkage));
 141 }
 142
 143 int
 144 _info(struct modinfo *modinfop)
 145 {
 146         return (mod_info(&modlinkage, modinfop));
 147 }