diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile index 08a76f6ed2f5..950495aa04f7 100644 --- a/share/man/man4/Makefile +++ b/share/man/man4/Makefile @@ -90,6 +90,7 @@ MAN= aac.4 \ ng_echo.4 \ ng_ether.4 \ ng_frame_relay.4 \ + ng_gif.4 \ ng_hole.4 \ ng_iface.4 \ ng_ksocket.4 \ diff --git a/share/man/man4/ng_gif.4 b/share/man/man4/ng_gif.4 new file mode 100644 index 000000000000..cc2e8d968626 --- /dev/null +++ b/share/man/man4/ng_gif.4 @@ -0,0 +1,129 @@ +.\" Copyright 2000 The Aerospace Corporation. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions, and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions, and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. The name of The Aerospace Corporation may not be used to endorse or +.\" promote products derived from this software. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE FOR +.\" ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" Author: Brooks Davis +.\" +.\" $FreeBSD$ +.\" +.Dd September 18, 2001 +.Dt NG_GIF 4 +.Os +.Sh NAME +.Nm ng_gif +.Nd Generic tunnel interface netgraph node type +.Sh SYNOPSIS +.Fd #include +.Sh DESCRIPTION +The +.Nm +netgraph node type allows +.Xr gif 4 +interfaces to interact with +the +.Xr netgraph 4 +networking subsystem. +Once the +.Nm +module is loaded in the kernel, a node is automatically created +for each +.Xr gif 4 +interface in the system. +Each node will attempt to name itself with the same name +as the associated interface. +All +.Nm +nodes are persistent for as long as the interface itself exists. +.Pp +Two hooks are supported: +.Dv lower +and +.Dv orphans . +The hook name +.Dv divert +may be used as an alias for +.Dv lower , +and is provided for compatibility with +.Xr ng_ether 4 . +In reality the two names represent the same hook. +.Pp +The +.Dv lower +hook is a connection to the raw +.Xr gif 4 +device. +When connected, all incoming packets are diverted out this hook. +Writing to this hook results in a raw encapsulated packet being transmitted +by the device. +Normal outgoing packets are not affected by +.Dv lower +being connected. +.Pp +The +.Dv orphans +hook is equivalent to +.Dv lower , +except that only unrecognized packets (that would otherwise be discarded) +are written to the hook, and normal incoming traffic is unaffected. +At most one of +.Dv orphans +and +.Dv lower +may be connected at any time. +.Pp +In all cases, frames are raw packets with the address family of the +packet attached to the front. +.Pp +When no hooks are connected, packets flow normally upwards and downwards. +.Sh HOOKS +This node type supports the following hooks: +.Pp +.Bl -tag -width orphans +.It Dv lower +Connection to the lower device link layer. +.It Dv orphans +Like +.Dv lower , +but only receives unrecognized packets. +.El +.Sh CONTROL MESSAGES +This node type supports only the generic control messages generic +control messages. +.Sh EXAMPLES +This command dumps all unrecognized packets received by the +.Dv gif0 +interface to standard output decoded in hex and ASCII: +.Bd -literal -offset indent +nghook -a gif0: orphans +.Ed +.Sh SEE ALSO +.Xr gif 4 , +.Xr netgraph 4 , +.Xr netintro 4 , +.Xr ifconfig 8 , +.Xr ngctl 8 , +.Xr nghook 8 +.Sh AUTHORS +.An Brooks Davis Aq brooks@FreeBSD.org diff --git a/share/man/man4/ng_gif_demux.4 b/share/man/man4/ng_gif_demux.4 new file mode 100644 index 000000000000..5adaa96d3dc1 --- /dev/null +++ b/share/man/man4/ng_gif_demux.4 @@ -0,0 +1,114 @@ +.\" Copyright 2000 The Aerospace Corporation. All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions, and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions, and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" 3. The name of The Aerospace Corporation may not be used to endorse or +.\" promote products derived from this software. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION "AS IS" AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE FOR +.\" ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" Author: Brooks Davis +.\" +.\" $FreeBSD$ +.\" +.Dd September 18, 2001 +.Dt NG_GIF_DEMUX 4 +.Os +.Sh NAME +.Nm ng_gif_demux +.Nd Demultiplexr for packets from +.Xr ng_gif 4 +nodes +.Sh SYNOPSIS +.Fd #include +.Sh DESCRIPTION +The +.Nm +netgraph node type demultiplexes the output from +.Xr ng_gif 4 +nodes in the +.Xr netgraph 4 +networking subsystem. +.Pp +The +.Dv gif +hook is ment to be connected to the +.Dv lower +or +.Dv orphans +hook of an +.Xr ng_gif 4 +node. +The +.Dv inet , +.Dv inet6 , +.Dv atalk , +.Dv ipx , +.Dv atm , +.Dv natm , +and +.Dv ns +hooks output frames of the given type when they are recieved on the +.Dv gif +hook. +When a frame is recived on one of these hooks, it is encapsulated and +sent out the +.Dv gif +hook. +.Sh HOOKS +This node type supports the following hooks: +.Pp +.Bl -tag -width inet6 +.It Dv gif +Connection to the +.Dv lower +or +.Dv orphans +hook of an +.Xr ng_gif 4 +node. +.It Dv inet +Hook for input and output of IP frames. +.It Dv inet6 +Hook for input and output of IPv6 frames. +.It Dv atalk +Hook for input and output of AppleTalk frames. +.It Dv ipx +Hook for input and output of IPX frames. +.It Dv atm +Hook for input and output of ATM frames. +.It Dv natm +Hook for input and output of NATM frames. +.It Dv ns +Hook for input and output of NS frames. +.El +.Sh CONTROL MESSAGES +This node type supports only the generic control messages generic +control messages. +.Sh SEE ALSO +.Xr gif 4 , +.Xr netgraph 4 , +.Xr netintro 4 , +.Xr ng_gif 4 , +.Xr ifconfig 8 , +.Xr ngctl 8 , +.Xr nghook 8 +.Sh AUTHORS +.An Brooks Davis Aq brooks@FreeBSD.org diff --git a/sys/conf/files b/sys/conf/files index b0bc30e1cba7..0c069410de8a 100644 --- a/sys/conf/files +++ b/sys/conf/files @@ -1029,6 +1029,8 @@ netgraph/ng_cisco.c optional netgraph_cisco netgraph/ng_echo.c optional netgraph_echo netgraph/ng_ether.c optional netgraph_ether netgraph/ng_frame_relay.c optional netgraph_frame_relay +netgraph/ng_gif.c optional netgraph_gif +netgraph/ng_gif_demux.c optional netgraph_gif_demux netgraph/ng_hole.c optional netgraph_hole netgraph/ng_iface.c optional netgraph_iface netgraph/ng_ksocket.c optional netgraph_ksocket diff --git a/sys/conf/options b/sys/conf/options index f6b9ccb6f995..34e79d30217e 100644 --- a/sys/conf/options +++ b/sys/conf/options @@ -311,6 +311,8 @@ NETGRAPH_CISCO opt_netgraph.h NETGRAPH_ECHO opt_netgraph.h NETGRAPH_ETHER opt_netgraph.h NETGRAPH_FRAME_RELAY opt_netgraph.h +NETGRAPH_GIF opt_netgraph.h +NETGRAPH_GIF_DEMUX opt_netgraph.h NETGRAPH_HOLE opt_netgraph.h NETGRAPH_IFACE opt_netgraph.h NETGRAPH_KSOCKET opt_netgraph.h diff --git a/sys/modules/netgraph/Makefile b/sys/modules/netgraph/Makefile index 466a4d473fbe..c043147a0193 100644 --- a/sys/modules/netgraph/Makefile +++ b/sys/modules/netgraph/Makefile @@ -9,6 +9,8 @@ SUBDIR= async \ eiface \ ether \ frame_relay \ + gif \ + gif_demux \ hole \ iface \ ksocket \ diff --git a/sys/modules/netgraph/gif/Makefile b/sys/modules/netgraph/gif/Makefile new file mode 100644 index 000000000000..4c18c27e50c2 --- /dev/null +++ b/sys/modules/netgraph/gif/Makefile @@ -0,0 +1,12 @@ +# $FreeBSD$ + +KMOD= ng_gif +SRCS= ng_gif.c opt_inet.h opt_inet6.h + +opt_inet.h: + echo "#define INET 1" > ${.TARGET} + +opt_inet6.h: + echo "#define INET6 1" > ${.TARGET} + +.include diff --git a/sys/modules/netgraph/gif_demux/Makefile b/sys/modules/netgraph/gif_demux/Makefile new file mode 100644 index 000000000000..56de5adf8ed0 --- /dev/null +++ b/sys/modules/netgraph/gif_demux/Makefile @@ -0,0 +1,6 @@ +# $FreeBSD$ + +KMOD= ng_gif_demux +SRCS= ng_gif_demux.c + +.include diff --git a/sys/net/if_gif.c b/sys/net/if_gif.c index c993e838b311..22ebf8f092ab 100644 --- a/sys/net/if_gif.c +++ b/sys/net/if_gif.c @@ -87,6 +87,11 @@ static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); static struct rman gifunits[1]; LIST_HEAD(, gif_softc) gif_softc_list; +void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af); +void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af); +void (*ng_gif_attach_p)(struct ifnet *ifp); +void (*ng_gif_detach_p)(struct ifnet *ifp); + int gif_clone_create __P((struct if_clone *, int *)); void gif_clone_destroy __P((struct ifnet *)); @@ -199,6 +204,8 @@ gif_clone_create(ifc, unit) sc->gif_if.if_snd.ifq_maxlen = IFQ_MAXLEN; if_attach(&sc->gif_if); bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); + if (ng_gif_attach_p != NULL) + (*ng_gif_attach_p)(&sc->gif_if); LIST_INSERT_HEAD(&gif_softc_list, sc, gif_link); return (0); } @@ -221,6 +228,8 @@ gif_clone_destroy(ifp) KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); } + if (ng_gif_detach_p != NULL) + (*ng_gif_detach_p)(ifp); bpfdetach(ifp); if_detach(ifp); @@ -462,6 +471,12 @@ gif_input(m, af, gifp) bpf_mtap(gifp, &m0); } + if (ng_gif_input_p != NULL) { + (*ng_gif_input_p)(gifp, &m, af); + if (m == NULL) + return; + } + /* * Put the packet to the network layer input queue according to the * specified address family. @@ -488,7 +503,10 @@ gif_input(m, af, gifp) break; #endif default: - m_freem(m); + if (ng_gif_input_orphan_p != NULL) + (*ng_gif_input_orphan_p)(gifp, m, af); + else + m_freem(m); return; } diff --git a/sys/net/if_gif.h b/sys/net/if_gif.h index 40626e2b300b..fffad5fe7b19 100644 --- a/sys/net/if_gif.h +++ b/sys/net/if_gif.h @@ -47,6 +47,14 @@ struct encaptab; +extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, + int af); +extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, + int af); +extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp); +extern void (*ng_gif_attach_p)(struct ifnet *ifp); +extern void (*ng_gif_detach_p)(struct ifnet *ifp); + struct gif_softc { struct ifnet gif_if; /* common area - must be at the top */ struct sockaddr *gif_psrc; /* Physical src addr */ @@ -61,6 +69,7 @@ struct gif_softc { const struct encaptab *encap_cookie4; const struct encaptab *encap_cookie6; struct resource *r_unit; /* resource allocated for this unit */ + void *gif_netgraph; /* ng_gif(4) netgraph node info */ LIST_ENTRY(gif_softc) gif_link; /* all gif's are linked */ }; diff --git a/sys/netgraph/ng_gif.c b/sys/netgraph/ng_gif.c new file mode 100644 index 000000000000..8f1c18ebcb08 --- /dev/null +++ b/sys/netgraph/ng_gif.c @@ -0,0 +1,596 @@ +/* + * ng_gif.c + * + * Copyright 2001 The Aerospace Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * + * Copyright (c) 1996-2000 Whistle Communications, Inc. + * All rights reserved. + * + * Subject to the following obligations and disclaimer of warranty, use and + * redistribution of this software, in source or object code forms, with or + * without modifications are expressly permitted by Whistle Communications; + * provided, however, that: + * 1. Any and all reproductions of the source or object code must include the + * copyright notice above and the following disclaimer of warranties; and + * 2. No rights are granted, in any manner or form, to use Whistle + * Communications, Inc. trademarks, including the mark "WHISTLE + * COMMUNICATIONS" on advertising, endorsements, or otherwise except as + * such appears in the above copyright notice or in the software. + * + * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO + * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, + * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. + * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY + * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS + * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. + * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES + * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING + * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * ng_gif(4) netgraph node type + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define IFP2NG(ifp) ((struct ng_node *)((struct gif_softc *)(ifp))->gif_netgraph) + +/* Per-node private data */ +struct private { + struct ifnet *ifp; /* associated interface */ + hook_p lower; /* lower OR orphan hook connection */ + u_char lowerOrphan; /* whether lower is lower or orphan */ +}; +typedef struct private *priv_p; + +/* Functional hooks called from if_gif.c */ +static void ng_gif_input(struct ifnet *ifp, struct mbuf **mp, int af); +static void ng_gif_input_orphan(struct ifnet *ifp, struct mbuf *m, int af); +static void ng_gif_attach(struct ifnet *ifp); +static void ng_gif_detach(struct ifnet *ifp); + +/* Other functions */ +static void ng_gif_input2(node_p node, struct mbuf **mp, int af); +static int ng_gif_glue_af(struct mbuf **mp, int af); +static int ng_gif_rcv_lower(node_p node, struct mbuf *m, meta_p meta); + +/* Netgraph node methods */ +static ng_constructor_t ng_gif_constructor; +static ng_rcvmsg_t ng_gif_rcvmsg; +static ng_shutdown_t ng_gif_shutdown; +static ng_newhook_t ng_gif_newhook; +static ng_connect_t ng_gif_connect; +static ng_rcvdata_t ng_gif_rcvdata; +static ng_disconnect_t ng_gif_disconnect; +static int ng_gif_mod_event(module_t mod, int event, void *data); + +/* List of commands and how to convert arguments to/from ASCII */ +static const struct ng_cmdlist ng_gif_cmdlist[] = { + { + NGM_GIF_COOKIE, + NGM_GIF_GET_IFNAME, + "getifname", + NULL, + &ng_parse_string_type + }, + { + NGM_GIF_COOKIE, + NGM_GIF_GET_IFINDEX, + "getifindex", + NULL, + &ng_parse_int32_type + }, + { 0 } +}; + +static struct ng_type ng_gif_typestruct = { + NG_ABI_VERSION, + NG_GIF_NODE_TYPE, + ng_gif_mod_event, + ng_gif_constructor, + ng_gif_rcvmsg, + ng_gif_shutdown, + ng_gif_newhook, + NULL, + ng_gif_connect, + ng_gif_rcvdata, + ng_gif_disconnect, + ng_gif_cmdlist, +}; +MODULE_VERSION(ng_gif, 1); +MODULE_DEPEND(ng_gif, if_gif, 1,1,1); +NETGRAPH_INIT(gif, &ng_gif_typestruct); + +/****************************************************************** + GIF FUNCTION HOOKS +******************************************************************/ + +/* + * Handle a packet that has come in on an interface. We get to + * look at it here before any upper layer protocols do. + * + * NOTE: this function will get called at splimp() + */ +static void +ng_gif_input(struct ifnet *ifp, struct mbuf **mp, int af) +{ + const node_p node = IFP2NG(ifp); + const priv_p priv = NG_NODE_PRIVATE(node); + + /* If "lower" hook not connected, let packet continue */ + if (priv->lower == NULL || priv->lowerOrphan) + return; + ng_gif_input2(node, mp, af); +} + +/* + * Handle a packet that has come in on an interface, and which + * does not match any of our known protocols (an ``orphan''). + * + * NOTE: this function will get called at splimp() + */ +static void +ng_gif_input_orphan(struct ifnet *ifp, struct mbuf *m, int af) +{ + const node_p node = IFP2NG(ifp); + const priv_p priv = NG_NODE_PRIVATE(node); + + /* If "orphan" hook not connected, let packet continue */ + if (priv->lower == NULL || !priv->lowerOrphan) { + m_freem(m); + return; + } + ng_gif_input2(node, &m, af); + if (m != NULL) + m_freem(m); +} + +/* + * Handle a packet that has come in on a gif interface. + * Attach the address family to the mbuf for later use. + * + * NOTE: this function will get called at splimp() + */ +static void +ng_gif_input2(node_p node, struct mbuf **mp, int af) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + int error; + + /* Glue address family on */ + if ((error = ng_gif_glue_af(mp, af)) != 0) + return; + + /* Send out lower/orphan hook */ + NG_SEND_DATA_ONLY(error, priv->lower, *mp); + *mp = NULL; +} + +/* + * A new gif interface has been attached. + * Create a new node for it, etc. + */ +static void +ng_gif_attach(struct ifnet *ifp) +{ + char name[IFNAMSIZ + 1]; + priv_p priv; + node_p node; + + /* Create node */ + KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __FUNCTION__)); + snprintf(name, sizeof(name), "%s%d", ifp->if_name, ifp->if_unit); + if (ng_make_node_common(&ng_gif_typestruct, &node) != 0) { + log(LOG_ERR, "%s: can't %s for %s\n", + __FUNCTION__, "create node", name); + return; + } + + /* Allocate private data */ + MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO); + if (priv == NULL) { + log(LOG_ERR, "%s: can't %s for %s\n", + __FUNCTION__, "allocate memory", name); + NG_NODE_UNREF(node); + return; + } + NG_NODE_SET_PRIVATE(node, priv); + priv->ifp = ifp; + IFP2NG(ifp) = node; + + /* Try to give the node the same name as the interface */ + if (ng_name_node(node, name) != 0) { + log(LOG_WARNING, "%s: can't name node %s\n", + __FUNCTION__, name); + } +} + +/* + * An Ethernet interface is being detached. + * REALLY Destroy its node. + */ +static void +ng_gif_detach(struct ifnet *ifp) +{ + const node_p node = IFP2NG(ifp); + const priv_p priv = NG_NODE_PRIVATE(node); + + if (node == NULL) /* no node (why not?), ignore */ + return; + NG_NODE_REALLY_DIE(node); /* Force real removal of node */ + /* + * We can't assume the ifnet is still around when we run shutdown + * So zap it now. XXX We HOPE that anything running at this time + * handles it (as it should in the non netgraph case). + */ + IFP2NG(ifp) = NULL; + priv->ifp = NULL; /* XXX race if interrupted an output packet */ + ng_rmnode_self(node); /* remove all netgraph parts */ +} + +/* + * Optimization for gluing the Ethernet header back onto + * the front of an incoming packet. + */ +static int +ng_gif_glue_af(struct mbuf **mp, int af) +{ + struct mbuf *m = *mp; + int error = 0; + sa_family_t tmp_af; + + tmp_af = (sa_family_t) af; + + /* + * XXX: should try to bring back some of the optimizations from + * ng_ether.c + */ + + /* + * Doing anything more is likely to get more + * expensive than it's worth.. + * it's probable that everything else is in one + * big lump. The next node will do an m_pullup() + * for exactly the amount of data it needs and + * hopefully everything after that will not + * need one. So let's just use M_PREPEND. + */ + M_PREPEND(m, sizeof (tmp_af), M_DONTWAIT); + if (m == NULL) { + error = ENOBUFS; + goto done; + } + +#if 0 +copy: +#endif + /* Copy header and return (possibly new) mbuf */ + *mtod(m, sa_family_t *) = tmp_af; +#if 0 + bcopy((caddr_t)&tmp_af, mtod(m, sa_family_t *), sizeof(tmp_af)); +#endif +done: + *mp = m; + return error; +} + +/****************************************************************** + NETGRAPH NODE METHODS +******************************************************************/ + +/* + * It is not possible or allowable to create a node of this type. + * Nodes get created when the interface is attached (or, when + * this node type's KLD is loaded). + */ +static int +ng_gif_constructor(node_p node) +{ + return (EINVAL); +} + +/* + * Check for attaching a new hook. + */ +static int +ng_gif_newhook(node_p node, hook_p hook, const char *name) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + u_char orphan = priv->lowerOrphan; + hook_p *hookptr; + + /* Divert hook is an alias for lower */ + if (strcmp(name, NG_GIF_HOOK_DIVERT) == 0) + name = NG_GIF_HOOK_LOWER; + + /* Which hook? */ + if (strcmp(name, NG_GIF_HOOK_LOWER) == 0) { + hookptr = &priv->lower; + orphan = 0; + } else if (strcmp(name, NG_GIF_HOOK_ORPHAN) == 0) { + hookptr = &priv->lower; + orphan = 1; + } else + return (EINVAL); + + /* Check if already connected (shouldn't be, but doesn't hurt) */ + if (*hookptr != NULL) + return (EISCONN); + + /* OK */ + *hookptr = hook; + priv->lowerOrphan = orphan; + return (0); +} + +/* + * Hooks are attached, adjust to force queueing. + * We don't really care which hook it is. + * they should all be queuing for outgoing data. + */ +static int +ng_gif_connect(hook_p hook) +{ + NG_HOOK_FORCE_QUEUE(NG_HOOK_PEER(hook)); + return (0); +} + +/* + * Receive an incoming control message. + */ +static int +ng_gif_rcvmsg(node_p node, item_p item, hook_p lasthook) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + struct ng_mesg *resp = NULL; + int error = 0; + struct ng_mesg *msg; + + NGI_GET_MSG(item, msg); + switch (msg->header.typecookie) { + case NGM_GIF_COOKIE: + switch (msg->header.cmd) { + case NGM_GIF_GET_IFNAME: + NG_MKRESPONSE(resp, msg, IFNAMSIZ + 1, M_NOWAIT); + if (resp == NULL) { + error = ENOMEM; + break; + } + snprintf(resp->data, IFNAMSIZ + 1, + "%s%d", priv->ifp->if_name, priv->ifp->if_unit); + break; + case NGM_GIF_GET_IFINDEX: + NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT); + if (resp == NULL) { + error = ENOMEM; + break; + } + *((u_int32_t *)resp->data) = priv->ifp->if_index; + break; + default: + error = EINVAL; + break; + } + break; + default: + error = EINVAL; + break; + } + NG_RESPOND_MSG(error, node, item, resp); + NG_FREE_MSG(msg); + return (error); +} + +/* + * Receive data on a hook. + */ +static int +ng_gif_rcvdata(hook_p hook, item_p item) +{ + const node_p node = NG_HOOK_NODE(hook); + const priv_p priv = NG_NODE_PRIVATE(node); + struct mbuf *m; + meta_p meta; + + NGI_GET_M(item, m); + NGI_GET_META(item, meta); + NG_FREE_ITEM(item); + if (hook == priv->lower) + return ng_gif_rcv_lower(node, m, meta); + panic("%s: weird hook", __FUNCTION__); +} + +/* + * Handle an mbuf received on the "lower" hook. + */ +static int +ng_gif_rcv_lower(node_p node, struct mbuf *m, meta_p meta) +{ + struct sockaddr dst; + const priv_p priv = NG_NODE_PRIVATE(node); + + bzero(&dst, sizeof(dst)); + + /* We don't process metadata. */ + NG_FREE_META(meta); + + /* Make sure header is fully pulled up */ + if (m->m_pkthdr.len < sizeof(sa_family_t)) { + NG_FREE_M(m); + return (EINVAL); + } + if (m->m_len < sizeof(sa_family_t) + && (m = m_pullup(m, sizeof(sa_family_t))) == NULL) { + return (ENOBUFS); + } + + dst.sa_family = *mtod(m, sa_family_t *); + m_adj(m, sizeof(sa_family_t)); + + /* Send it on its way */ + /* + * XXX: gif_output only uses dst for the family and passes the + * fourth argument (rt) to in{,6}_gif_output which ignore it. + * If this changes ng_gif will probably break. + */ + return gif_output(priv->ifp, m, &dst, NULL); +} + +/* + * Shutdown node. This resets the node but does not remove it + * unless the REALLY_DIE flag is set. + */ +static int +ng_gif_shutdown(node_p node) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + + if (node->nd_flags & NG_REALLY_DIE) { + /* + * WE came here because the gif interface is being destroyed, + * so stop being persistant. + * Actually undo all the things we did on creation. + * Assume the ifp has already been freed. + */ + NG_NODE_SET_PRIVATE(node, NULL); + FREE(priv, M_NETGRAPH); + NG_NODE_UNREF(node); /* free node itself */ + return (0); + } + node->nd_flags &= ~NG_INVALID; /* Signal ng_rmnode we are persisant */ + return (0); +} + +/* + * Hook disconnection. + */ +static int +ng_gif_disconnect(hook_p hook) +{ + const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); + + if (hook == priv->lower) { + priv->lower = NULL; + priv->lowerOrphan = 0; + } else + panic("%s: weird hook", __FUNCTION__); + if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0) + && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) + ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */ + + return (0); +} + +/****************************************************************** + INITIALIZATION +******************************************************************/ + +/* + * Handle loading and unloading for this node type. + */ +static int +ng_gif_mod_event(module_t mod, int event, void *data) +{ + struct ifnet *ifp; + int error = 0; + int s; + + s = splnet(); + switch (event) { + case MOD_LOAD: + + /* Register function hooks */ + if (ng_gif_attach_p != NULL) { + error = EEXIST; + break; + } + ng_gif_attach_p = ng_gif_attach; + ng_gif_detach_p = ng_gif_detach; + ng_gif_input_p = ng_gif_input; + ng_gif_input_orphan_p = ng_gif_input_orphan; + + /* Create nodes for any already-existing gif interfaces */ + TAILQ_FOREACH(ifp, &ifnet, if_link) { + if (ifp->if_type == IFT_GIF) + ng_gif_attach(ifp); + } + break; + + case MOD_UNLOAD: + + /* + * Note that the base code won't try to unload us until + * all nodes have been removed, and that can't happen + * until all gif interfaces are destroyed. In any + * case, we know there are no nodes left if the action + * is MOD_UNLOAD, so there's no need to detach any nodes. + * + * XXX: what about manual unloads?!? + */ + + /* Unregister function hooks */ + ng_gif_attach_p = NULL; + ng_gif_detach_p = NULL; + ng_gif_input_p = NULL; + ng_gif_input_orphan_p = NULL; + break; + + default: + error = EOPNOTSUPP; + break; + } + splx(s); + return (error); +} + diff --git a/sys/netgraph/ng_gif.h b/sys/netgraph/ng_gif.h new file mode 100644 index 000000000000..8f3d445a2231 --- /dev/null +++ b/sys/netgraph/ng_gif.h @@ -0,0 +1,81 @@ +/* + * ng_gif.h + * + * Copyright 2001 The Aerospace Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * + * Copyright (c) 1996-1999 Whistle Communications, Inc. + * All rights reserved. + * + * Subject to the following obligations and disclaimer of warranty, use and + * redistribution of this software, in source or object code forms, with or + * without modifications are expressly permitted by Whistle Communications; + * provided, however, that: + * 1. Any and all reproductions of the source or object code must include the + * copyright notice above and the following disclaimer of warranties; and + * 2. No rights are granted, in any manner or form, to use Whistle + * Communications, Inc. trademarks, including the mark "WHISTLE + * COMMUNICATIONS" on advertising, endorsements, or otherwise except as + * such appears in the above copyright notice or in the software. + * + * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO + * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, + * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. + * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY + * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS + * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. + * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES + * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING + * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _NETGRAPH_NG_GIF_H_ +#define _NETGRAPH_NG_GIF_H_ + +/* Node type name and magic cookie */ +#define NG_GIF_NODE_TYPE "gif" +#define NGM_GIF_COOKIE 994115727 + +/* Hook names */ +#define NG_GIF_HOOK_LOWER "lower" /* connection to raw device */ +#define NG_GIF_HOOK_DIVERT "divert" /* alias for lower */ +#define NG_GIF_HOOK_ORPHAN "orphans" /* like lower, unknowns only */ + +/* Netgraph control messages */ +enum { + NGM_GIF_GET_IFNAME = 1, /* get the interface name */ + NGM_GIF_GET_IFINDEX, /* get the interface global index # */ +}; + +#endif /* _NETGRAPH_NG_GIF_H_ */ diff --git a/sys/netgraph/ng_gif_demux.c b/sys/netgraph/ng_gif_demux.c new file mode 100644 index 000000000000..084cf5799a16 --- /dev/null +++ b/sys/netgraph/ng_gif_demux.c @@ -0,0 +1,398 @@ +/* + * ng_gif_demux.c + * + * Copyright 2001 The Aerospace Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * + * Copyright (c) 1996-1999 Whistle Communications, Inc. + * All rights reserved. + * + * Subject to the following obligations and disclaimer of warranty, use and + * redistribution of this software, in source or object code forms, with or + * without modifications are expressly permitted by Whistle Communications; + * provided, however, that: + * 1. Any and all reproductions of the source or object code must include the + * copyright notice above and the following disclaimer of warranties; and + * 2. No rights are granted, in any manner or form, to use Whistle + * Communications, Inc. trademarks, including the mark "WHISTLE + * COMMUNICATIONS" on advertising, endorsements, or otherwise except as + * such appears in the above copyright notice or in the software. + * + * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND + * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO + * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, + * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. + * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY + * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS + * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. + * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES + * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING + * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * ng_gif_demux(4) netgraph node type + * + * Packets received on the "gif" hook have their type header removed + * and are passed to the appropriate hook protocol hook. Packets + * recieved on a protocol hook have a type header added back and are + * passed out the gif hook. The currently supported protocol hooks are: + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#ifdef NG_SEPARATE_MALLOC +MALLOC_DEFINE(M_NETGRAPH_GIF_DEMUX, "netgraph_gif_demux", + "netgraph gif demux node"); +#else +#define M_NETGRAPH_GIF_DEMUX M_NETGRAPH +#endif + +/* This struct describes one address family */ +struct iffam { + sa_family_t family; /* Address family */ + const char *hookname; /* Name for hook */ +}; +typedef const struct iffam *iffam_p; + +/* List of address families supported by our interface */ +const static struct iffam gFamilies[] = { + { AF_INET, NG_GIF_DEMUX_HOOK_INET }, + { AF_INET6, NG_GIF_DEMUX_HOOK_INET6 }, + { AF_APPLETALK, NG_GIF_DEMUX_HOOK_ATALK }, + { AF_IPX, NG_GIF_DEMUX_HOOK_IPX }, + { AF_ATM, NG_GIF_DEMUX_HOOK_ATM }, + { AF_NATM, NG_GIF_DEMUX_HOOK_NATM }, + { AF_NS, NG_GIF_DEMUX_HOOK_NS }, +}; +#define NUM_FAMILIES (sizeof(gFamilies) / sizeof(*gFamilies)) + +/* Per-node private data */ +struct ng_gif_demux_private { + node_p node; /* Our netgraph node */ + hook_p gif; /* The gif hook */ + hook_p hooks[NUM_FAMILIES]; /* The protocol hooks */ +}; +typedef struct ng_gif_demux_private *priv_p; + +/* Netgraph node methods */ +static ng_constructor_t ng_gif_demux_constructor; +static ng_rcvmsg_t ng_gif_demux_rcvmsg; +static ng_shutdown_t ng_gif_demux_shutdown; +static ng_newhook_t ng_gif_demux_newhook; +static ng_rcvdata_t ng_gif_demux_rcvdata; +static ng_disconnect_t ng_gif_demux_disconnect; + +/* Helper stuff */ +static iffam_p get_iffam_from_af(sa_family_t family); +static iffam_p get_iffam_from_hook(priv_p priv, hook_p hook); +static iffam_p get_iffam_from_name(const char *name); +static hook_p *get_hook_from_iffam(priv_p priv, iffam_p iffam); + +/****************************************************************** + NETGRAPH PARSE TYPES +******************************************************************/ + +/* List of commands and how to convert arguments to/from ASCII */ +static const struct ng_cmdlist ng_gif_demux_cmdlist[] = { + { 0 } +}; + +/* Node type descriptor */ +static struct ng_type ng_gif_demux_typestruct = { + NG_ABI_VERSION, + NG_GIF_DEMUX_NODE_TYPE, + NULL, + ng_gif_demux_constructor, + ng_gif_demux_rcvmsg, + ng_gif_demux_shutdown, + ng_gif_demux_newhook, + NULL, + NULL, + ng_gif_demux_rcvdata, + ng_gif_demux_disconnect, + ng_gif_demux_cmdlist, +}; +NETGRAPH_INIT(gif_demux, &ng_gif_demux_typestruct); + +/************************************************************************ + HELPER STUFF + ************************************************************************/ + +/* + * Get the family descriptor from the family ID + */ +static __inline__ iffam_p +get_iffam_from_af(sa_family_t family) +{ + iffam_p iffam; + int k; + + for (k = 0; k < NUM_FAMILIES; k++) { + iffam = &gFamilies[k]; + if (iffam->family == family) + return (iffam); + } + return (NULL); +} + +/* + * Get the family descriptor from the hook + */ +static __inline__ iffam_p +get_iffam_from_hook(priv_p priv, hook_p hook) +{ + int k; + + for (k = 0; k < NUM_FAMILIES; k++) + if (priv->hooks[k] == hook) + return (&gFamilies[k]); + return (NULL); +} + +/* + * Get the hook from the iffam descriptor + */ + +static __inline__ hook_p * +get_hook_from_iffam(priv_p priv, iffam_p iffam) +{ + return (&priv->hooks[iffam - gFamilies]); +} + +/* + * Get the iffam descriptor from the name + */ +static __inline__ iffam_p +get_iffam_from_name(const char *name) +{ + iffam_p iffam; + int k; + + for (k = 0; k < NUM_FAMILIES; k++) { + iffam = &gFamilies[k]; + if (!strcmp(iffam->hookname, name)) + return (iffam); + } + return (NULL); +} + +/****************************************************************** + NETGRAPH NODE METHODS +******************************************************************/ + +/* + * Node constructor + */ +static int +ng_gif_demux_constructor(node_p node) +{ + priv_p priv; + + /* Allocate and initialize private info */ + MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH_GIF_DEMUX, + M_NOWAIT | M_ZERO); + if (priv == NULL) + return (ENOMEM); + priv->node = node; + + NG_NODE_SET_PRIVATE(node, priv); + + /* Done */ + return (0); +} + +/* + * Method for attaching a new hook + */ +static int +ng_gif_demux_newhook(node_p node, hook_p hook, const char *name) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + iffam_p iffam; + hook_p *hookptr; + + if (strcmp(NG_GIF_DEMUX_HOOK_GIF, name) == 0) + hookptr = &priv->gif; + else { + iffam = get_iffam_from_name(name); + if (iffam == NULL) + return (EPFNOSUPPORT); + hookptr = get_hook_from_iffam(NG_NODE_PRIVATE(node), iffam); + } + if (*hookptr != NULL) + return (EISCONN); + *hookptr = hook; + return (0); +} + +/* + * Receive a control message + */ +static int +ng_gif_demux_rcvmsg(node_p node, item_p item, hook_p lasthook) +{ + struct ng_mesg *resp = NULL; + int error = 0; + struct ng_mesg *msg; + + NGI_GET_MSG(item, msg); + switch (msg->header.typecookie) { + case NGM_GIF_DEMUX_COOKIE: + switch (msg->header.cmd) { + /* XXX: Add commands here. */ + default: + error = EINVAL; + break; + } + break; + default: + error = EINVAL; + break; + } + + /* Done */ + NG_RESPOND_MSG(error, node, item, resp); + NG_FREE_MSG(msg); + return (error); +} + +/* + * Receive data on a hook + */ +static int +ng_gif_demux_rcvdata(hook_p hook, item_p item) +{ + const node_p node = NG_HOOK_NODE(hook); + const priv_p priv = NG_NODE_PRIVATE(node); + iffam_p iffam; + hook_p outhook; + int error = 0; + struct mbuf *m; + + /* Pull the mbuf out of the item for processing. */ + NGI_GET_M(item, m); + + if (hook == priv->gif) { + /* + * Pull off the address family header and find the + * output hook. + */ + if (m->m_pkthdr.len < sizeof(sa_family_t)) { + NG_FREE_M(m); + NG_FREE_ITEM(item); + return (EINVAL); + } + if (m->m_len < sizeof(sa_family_t) + && (m = m_pullup(m, sizeof(sa_family_t))) == NULL) { + NG_FREE_ITEM(item); + return (ENOBUFS); + } + iffam = get_iffam_from_af(*mtod(m, sa_family_t *)); + if (iffam == NULL) { + NG_FREE_M(m); + NG_FREE_ITEM(item); + return (EINVAL); + } + outhook = *get_hook_from_iffam(priv, iffam); + m_adj(m, sizeof(sa_family_t)); + } else { + /* + * Add address family header and set the output hook. + */ + iffam = get_iffam_from_hook(priv, hook); + M_PREPEND(m, sizeof (iffam->family), M_DONTWAIT); + if (m == NULL) { + NG_FREE_M(m); + NG_FREE_ITEM(item); + return (ENOBUFS); + } + bcopy(&iffam->family, mtod(m, sa_family_t *), + sizeof(iffam->family)); + outhook = priv->gif; + } + + /* Stuff the mbuf back in. */ + NGI_M(item) = m; + + /* Deliver packet */ + NG_FWD_ITEM_HOOK(error, item, outhook); + return (error); +} + +/* + * Shutdown node + */ +static int +ng_gif_demux_shutdown(node_p node) +{ + const priv_p priv = NG_NODE_PRIVATE(node); + + FREE(priv, M_NETGRAPH_GIF_DEMUX); + NG_NODE_SET_PRIVATE(node, NULL); + NG_NODE_UNREF(node); + return (0); +} + +/* + * Hook disconnection. + */ +static int +ng_gif_demux_disconnect(hook_p hook) +{ + const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook)); + iffam_p iffam; + + if (hook == priv->gif) + priv->gif = NULL; + else { + iffam = get_iffam_from_hook(priv, hook); + if (iffam == NULL) + panic(__FUNCTION__); + *get_hook_from_iffam(priv, iffam) = NULL; + } + + return (0); +} diff --git a/sys/netgraph/ng_gif_demux.h b/sys/netgraph/ng_gif_demux.h new file mode 100644 index 000000000000..2006f56bd0bc --- /dev/null +++ b/sys/netgraph/ng_gif_demux.h @@ -0,0 +1,47 @@ +/* + * ng_gif_demux.h + * + * Copyright 2001 The Aerospace Corporation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AEROSPACE CORPORATION ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AEROSPACE CORPORATION BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _NETGRAPH_NG_GIF_DEMUX_H_ +#define _NETGRAPH_NG_GIF_DEMUX_H_ + +/* Node type name and magic cookie */ +#define NG_GIF_DEMUX_NODE_TYPE "gif_demux" +#define NGM_GIF_DEMUX_COOKIE 995567329 + +/* Hook names */ +#define NG_GIF_DEMUX_HOOK_GIF "gif" +#define NG_GIF_DEMUX_HOOK_INET "inet" +#define NG_GIF_DEMUX_HOOK_INET6 "inet6" +#define NG_GIF_DEMUX_HOOK_ATALK "atalk" +#define NG_GIF_DEMUX_HOOK_IPX "ipx" +#define NG_GIF_DEMUX_HOOK_ATM "atm" +#define NG_GIF_DEMUX_HOOK_NATM "natm" +#define NG_GIF_DEMUX_HOOK_NS "ns" + +#endif /* _NETGRAPH_NG_GIF_DEMUX_H_ */