674d86bf91
context always. Convert nodes to consistently use M_WAITOK flag for memory allocation. Reviewed by: julian
609 lines
13 KiB
C
609 lines
13 KiB
C
/*-
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* Copyright (c) 2001-2003
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* Fraunhofer Institute for Open Communication Systems (FhG Fokus).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Author: Hartmut Brandt <harti@freebsd.org>
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*
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* Netgraph module for ITU-T Q.2120 UNI SSCF.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/errno.h>
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#include <sys/syslog.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sbuf.h>
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#include <machine/stdarg.h>
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#include <netgraph/ng_message.h>
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#include <netgraph/netgraph.h>
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#include <netgraph/ng_parse.h>
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#include <netnatm/saal/sscopdef.h>
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#include <netnatm/saal/sscfudef.h>
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#include <netgraph/atm/ng_sscop.h>
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#include <netgraph/atm/ng_sscfu.h>
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#include <netgraph/atm/sscfu/ng_sscfu_cust.h>
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#include <netnatm/saal/sscfu.h>
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MALLOC_DEFINE(M_NG_SSCFU, "netgraph_sscfu", "netgraph uni sscf node");
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MODULE_DEPEND(ng_sscfu, ngatmbase, 1, 1, 1);
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/*
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* Private data
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*/
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struct priv {
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hook_p upper; /* SAAL interface */
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hook_p lower; /* SSCOP interface */
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struct sscfu *sscf; /* the instance */
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int enabled;
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};
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/*
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* PARSING
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*/
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/*
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* Parse PARAM type
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*/
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static const struct ng_parse_struct_field ng_sscop_param_type_info[] =
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NG_SSCOP_PARAM_INFO;
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static const struct ng_parse_type ng_sscop_param_type = {
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&ng_parse_struct_type,
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ng_sscop_param_type_info
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};
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static const struct ng_parse_struct_field ng_sscfu_getdefparam_type_info[] =
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NG_SSCFU_GETDEFPARAM_INFO;
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static const struct ng_parse_type ng_sscfu_getdefparam_type = {
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&ng_parse_struct_type,
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ng_sscfu_getdefparam_type_info
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};
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static const struct ng_cmdlist ng_sscfu_cmdlist[] = {
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{
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NGM_SSCFU_COOKIE,
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NGM_SSCFU_GETDEFPARAM,
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"getdefparam",
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NULL,
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&ng_sscfu_getdefparam_type
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},
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{
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NGM_SSCFU_COOKIE,
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NGM_SSCFU_ENABLE,
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"enable",
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NULL,
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NULL
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},
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{
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NGM_SSCFU_COOKIE,
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NGM_SSCFU_DISABLE,
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"disable",
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NULL,
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NULL
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},
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{
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NGM_SSCFU_COOKIE,
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NGM_SSCFU_GETDEBUG,
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"getdebug",
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NULL,
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&ng_parse_hint32_type
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},
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{
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NGM_SSCFU_COOKIE,
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NGM_SSCFU_SETDEBUG,
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"setdebug",
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&ng_parse_hint32_type,
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NULL
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},
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{
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NGM_SSCFU_COOKIE,
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NGM_SSCFU_GETSTATE,
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"getstate",
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NULL,
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&ng_parse_uint32_type
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},
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{ 0 }
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};
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static ng_constructor_t ng_sscfu_constructor;
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static ng_shutdown_t ng_sscfu_shutdown;
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static ng_rcvmsg_t ng_sscfu_rcvmsg;
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static ng_newhook_t ng_sscfu_newhook;
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static ng_disconnect_t ng_sscfu_disconnect;
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static ng_rcvdata_t ng_sscfu_rcvupper;
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static ng_rcvdata_t ng_sscfu_rcvlower;
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static int ng_sscfu_mod_event(module_t, int, void *);
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static struct ng_type ng_sscfu_typestruct = {
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.version = NG_ABI_VERSION,
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.name = NG_SSCFU_NODE_TYPE,
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.mod_event = ng_sscfu_mod_event,
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.constructor = ng_sscfu_constructor,
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.rcvmsg = ng_sscfu_rcvmsg,
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.shutdown = ng_sscfu_shutdown,
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.newhook = ng_sscfu_newhook,
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.rcvdata = ng_sscfu_rcvupper,
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.disconnect = ng_sscfu_disconnect,
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.cmdlist = ng_sscfu_cmdlist,
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};
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NETGRAPH_INIT(sscfu, &ng_sscfu_typestruct);
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static void sscfu_send_upper(struct sscfu *, void *, enum saal_sig,
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struct mbuf *);
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static void sscfu_send_lower(struct sscfu *, void *, enum sscop_aasig,
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struct mbuf *, u_int);
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static void sscfu_window(struct sscfu *, void *, u_int);
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static void sscfu_verbose(struct sscfu *, void *, const char *, ...)
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__printflike(3, 4);
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static const struct sscfu_funcs sscfu_funcs = {
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sscfu_send_upper,
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sscfu_send_lower,
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sscfu_window,
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sscfu_verbose
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};
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/************************************************************/
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/*
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* CONTROL MESSAGES
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*/
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static int
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text_status(node_p node, struct priv *priv, char *arg, u_int len)
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{
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struct sbuf sbuf;
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sbuf_new(&sbuf, arg, len, 0);
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if (priv->upper)
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sbuf_printf(&sbuf, "upper hook: %s connected to %s:%s\n",
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NG_HOOK_NAME(priv->upper),
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NG_NODE_NAME(NG_HOOK_NODE(NG_HOOK_PEER(priv->upper))),
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NG_HOOK_NAME(NG_HOOK_PEER(priv->upper)));
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else
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sbuf_printf(&sbuf, "upper hook: <not connected>\n");
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if (priv->lower)
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sbuf_printf(&sbuf, "lower hook: %s connected to %s:%s\n",
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NG_HOOK_NAME(priv->lower),
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NG_NODE_NAME(NG_HOOK_NODE(NG_HOOK_PEER(priv->lower))),
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NG_HOOK_NAME(NG_HOOK_PEER(priv->lower)));
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else
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sbuf_printf(&sbuf, "lower hook: <not connected>\n");
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sbuf_printf(&sbuf, "sscf state: %s\n",
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priv->enabled == 0 ? "<disabled>" :
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sscfu_statename(sscfu_getstate(priv->sscf)));
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sbuf_finish(&sbuf);
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return (sbuf_len(&sbuf));
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}
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static int
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ng_sscfu_rcvmsg(node_p node, item_p item, hook_p lasthook)
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{
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struct priv *priv = NG_NODE_PRIVATE(node);
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struct ng_mesg *resp = NULL;
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struct ng_mesg *msg;
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int error = 0;
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NGI_GET_MSG(item, msg);
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switch (msg->header.typecookie) {
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case NGM_GENERIC_COOKIE:
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switch (msg->header.cmd) {
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case NGM_TEXT_STATUS:
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NG_MKRESPONSE(resp, msg, NG_TEXTRESPONSE, M_NOWAIT);
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if (resp == NULL) {
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error = ENOMEM;
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break;
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}
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resp->header.arglen = text_status(node, priv,
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(char *)resp->data, resp->header.arglen) + 1;
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break;
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default:
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error = EINVAL;
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break;
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}
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break;
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case NGM_SSCFU_COOKIE:
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switch (msg->header.cmd) {
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case NGM_SSCFU_GETDEFPARAM:
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{
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struct ng_sscfu_getdefparam *p;
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if (msg->header.arglen != 0) {
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error = EINVAL;
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break;
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}
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NG_MKRESPONSE(resp, msg, sizeof(*p), M_NOWAIT);
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if (resp == NULL) {
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error = ENOMEM;
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break;
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}
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p = (struct ng_sscfu_getdefparam *)resp->data;
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p->mask = sscfu_getdefparam(&p->param);
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break;
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}
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case NGM_SSCFU_ENABLE:
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if (msg->header.arglen != 0) {
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error = EINVAL;
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break;
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}
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if (priv->enabled) {
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error = EISCONN;
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break;
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}
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priv->enabled = 1;
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break;
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case NGM_SSCFU_DISABLE:
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if (msg->header.arglen != 0) {
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error = EINVAL;
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break;
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}
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if (!priv->enabled) {
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error = ENOTCONN;
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break;
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}
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priv->enabled = 0;
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sscfu_reset(priv->sscf);
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break;
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case NGM_SSCFU_GETSTATE:
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if (msg->header.arglen != 0) {
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error = EINVAL;
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break;
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}
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NG_MKRESPONSE(resp, msg, sizeof(uint32_t), M_NOWAIT);
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if(resp == NULL) {
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error = ENOMEM;
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break;
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}
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*(uint32_t *)resp->data =
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priv->enabled ? (sscfu_getstate(priv->sscf) + 1)
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: 0;
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break;
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case NGM_SSCFU_GETDEBUG:
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if (msg->header.arglen != 0) {
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error = EINVAL;
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break;
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}
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NG_MKRESPONSE(resp, msg, sizeof(uint32_t), M_NOWAIT);
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if(resp == NULL) {
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error = ENOMEM;
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break;
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}
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*(uint32_t *)resp->data = sscfu_getdebug(priv->sscf);
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break;
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case NGM_SSCFU_SETDEBUG:
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if (msg->header.arglen != sizeof(uint32_t)) {
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error = EINVAL;
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break;
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}
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sscfu_setdebug(priv->sscf, *(uint32_t *)msg->data);
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break;
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default:
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error = EINVAL;
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break;
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}
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break;
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default:
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error = EINVAL;
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break;
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}
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NG_RESPOND_MSG(error, node, item, resp);
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NG_FREE_MSG(msg);
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return (error);
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}
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/************************************************************/
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/*
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* HOOK MANAGEMENT
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*/
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static int
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ng_sscfu_newhook(node_p node, hook_p hook, const char *name)
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{
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struct priv *priv = NG_NODE_PRIVATE(node);
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if (strcmp(name, "upper") == 0)
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priv->upper = hook;
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else if (strcmp(name, "lower") == 0) {
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priv->lower = hook;
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NG_HOOK_SET_RCVDATA(hook, ng_sscfu_rcvlower);
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} else
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return (EINVAL);
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return (0);
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}
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static int
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ng_sscfu_disconnect(hook_p hook)
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{
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node_p node = NG_HOOK_NODE(hook);
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struct priv *priv = NG_NODE_PRIVATE(node);
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if (hook == priv->upper)
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priv->upper = NULL;
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else if (hook == priv->lower)
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priv->lower = NULL;
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else {
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log(LOG_ERR, "bogus hook");
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return (EINVAL);
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}
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if (NG_NODE_NUMHOOKS(node) == 0) {
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if (NG_NODE_IS_VALID(node))
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ng_rmnode_self(node);
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} else {
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/*
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* Because there are no timeouts reset the protocol
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* if the lower layer is disconnected.
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*/
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if (priv->lower == NULL &&
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priv->enabled &&
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sscfu_getstate(priv->sscf) != SSCFU_RELEASED)
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sscfu_reset(priv->sscf);
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}
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return (0);
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}
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/************************************************************/
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/*
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* DATA
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*/
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static int
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ng_sscfu_rcvupper(hook_p hook, item_p item)
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{
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node_p node = NG_HOOK_NODE(hook);
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struct priv *priv = NG_NODE_PRIVATE(node);
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struct mbuf *m;
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struct sscfu_arg a;
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if (!priv->enabled || priv->lower == NULL) {
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NG_FREE_ITEM(item);
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return (0);
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}
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NGI_GET_M(item, m);
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NG_FREE_ITEM(item);
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if (!(m->m_flags & M_PKTHDR)) {
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printf("no pkthdr\n");
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m_freem(m);
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return (EINVAL);
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}
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if (m->m_len < (int)sizeof(a) && (m = m_pullup(m, sizeof(a))) == NULL)
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return (ENOMEM);
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bcopy((caddr_t)mtod(m, struct sscfu_arg *), &a, sizeof(a));
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m_adj(m, sizeof(a));
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return (sscfu_saalsig(priv->sscf, a.sig, m));
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}
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static void
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sscfu_send_upper(struct sscfu *sscf, void *p, enum saal_sig sig, struct mbuf *m)
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{
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node_p node = (node_p)p;
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struct priv *priv = NG_NODE_PRIVATE(node);
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int error;
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struct sscfu_arg *a;
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if (priv->upper == NULL) {
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if (m != NULL)
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m_freem(m);
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return;
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}
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if (m == NULL) {
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MGETHDR(m, M_NOWAIT, MT_DATA);
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if (m == NULL)
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return;
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m->m_len = sizeof(struct sscfu_arg);
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m->m_pkthdr.len = m->m_len;
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} else {
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M_PREPEND(m, sizeof(struct sscfu_arg), M_NOWAIT);
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if (m == NULL)
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return;
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}
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a = mtod(m, struct sscfu_arg *);
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a->sig = sig;
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NG_SEND_DATA_ONLY(error, priv->upper, m);
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}
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static int
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ng_sscfu_rcvlower(hook_p hook, item_p item)
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{
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node_p node = NG_HOOK_NODE(hook);
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struct priv *priv = NG_NODE_PRIVATE(node);
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struct mbuf *m;
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struct sscop_arg a;
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if (!priv->enabled || priv->upper == NULL) {
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NG_FREE_ITEM(item);
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return (0);
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}
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NGI_GET_M(item, m);
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NG_FREE_ITEM(item);
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if (!(m->m_flags & M_PKTHDR)) {
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printf("no pkthdr\n");
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m_freem(m);
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return (EINVAL);
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}
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/*
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* Strip of the SSCOP header.
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*/
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if (m->m_len < (int)sizeof(a) && (m = m_pullup(m, sizeof(a))) == NULL)
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return (ENOMEM);
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bcopy((caddr_t)mtod(m, struct sscop_arg *), &a, sizeof(a));
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m_adj(m, sizeof(a));
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sscfu_input(priv->sscf, a.sig, m, a.arg);
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return (0);
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}
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static void
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sscfu_send_lower(struct sscfu *sscf, void *p, enum sscop_aasig sig,
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struct mbuf *m, u_int arg)
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{
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node_p node = (node_p)p;
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struct priv *priv = NG_NODE_PRIVATE(node);
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int error;
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struct sscop_arg *a;
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if (priv->lower == NULL) {
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if (m != NULL)
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m_freem(m);
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return;
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}
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if (m == NULL) {
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MGETHDR(m, M_NOWAIT, MT_DATA);
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if (m == NULL)
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return;
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m->m_len = sizeof(struct sscop_arg);
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m->m_pkthdr.len = m->m_len;
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} else {
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M_PREPEND(m, sizeof(struct sscop_arg), M_NOWAIT);
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if (m == NULL)
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return;
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}
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a = mtod(m, struct sscop_arg *);
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a->sig = sig;
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a->arg = arg;
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NG_SEND_DATA_ONLY(error, priv->lower, m);
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}
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/*
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* Window is handled by ng_sscop so make this a NOP.
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*/
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static void
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sscfu_window(struct sscfu *sscfu, void *arg, u_int w)
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{
|
|
}
|
|
|
|
/************************************************************/
|
|
/*
|
|
* NODE MANAGEMENT
|
|
*/
|
|
static int
|
|
ng_sscfu_constructor(node_p node)
|
|
{
|
|
struct priv *priv;
|
|
|
|
priv = malloc(sizeof(*priv), M_NG_SSCFU, M_WAITOK | M_ZERO);
|
|
|
|
if ((priv->sscf = sscfu_create(node, &sscfu_funcs)) == NULL) {
|
|
free(priv, M_NG_SSCFU);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
NG_NODE_SET_PRIVATE(node, priv);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ng_sscfu_shutdown(node_p node)
|
|
{
|
|
struct priv *priv = NG_NODE_PRIVATE(node);
|
|
|
|
sscfu_destroy(priv->sscf);
|
|
|
|
free(priv, M_NG_SSCFU);
|
|
NG_NODE_SET_PRIVATE(node, NULL);
|
|
|
|
NG_NODE_UNREF(node);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
sscfu_verbose(struct sscfu *sscfu, void *arg, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
printf("sscfu(%p): ", sscfu);
|
|
vprintf(fmt, ap);
|
|
va_end(ap);
|
|
printf("\n");
|
|
}
|
|
|
|
/************************************************************/
|
|
/*
|
|
* INITIALISATION
|
|
*/
|
|
/*
|
|
* Loading and unloading of node type
|
|
*/
|
|
static int
|
|
ng_sscfu_mod_event(module_t mod, int event, void *data)
|
|
{
|
|
int s;
|
|
int error = 0;
|
|
|
|
s = splnet();
|
|
switch (event) {
|
|
|
|
case MOD_LOAD:
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
break;
|
|
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
splx(s);
|
|
return (error);
|
|
}
|