795 lines
20 KiB
C
795 lines
20 KiB
C
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/*
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* ng_iface.c
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*
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* Copyright (c) 1996-1999 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Archie Cobbs <archie@whistle.com>
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*
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* $FreeBSD$
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* $Whistle: ng_iface.c,v 1.33 1999/11/01 09:24:51 julian Exp $
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*/
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/*
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* This node is also a system networking interface. It has
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* a hook for each protocol (IP, AppleTalk, IPX, etc). Packets
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* are simply relayed between the interface and the hooks.
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*
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* Interfaces are named ng0, ng1, etc. New nodes take the
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* first available interface name.
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*
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* This node also includes Berkeley packet filter support.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/errno.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/sockio.h>
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#include <sys/socket.h>
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#include <sys/syslog.h>
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#include <sys/libkern.h>
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#include <net/if.h>
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#include <net/if_types.h>
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#include <net/intrq.h>
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#include <net/bpf.h>
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#include <netinet/in.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 <netgraph/ng_iface.h>
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#include <netgraph/ng_cisco.h>
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/* This struct describes one address family */
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struct iffam {
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sa_family_t family; /* Address family */
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const char *hookname; /* Name for hook */
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};
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typedef const struct iffam *iffam_p;
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/* List of address families supported by our interface */
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const static struct iffam gFamilies[] = {
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{ AF_INET, NG_IFACE_HOOK_INET },
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{ AF_INET6, NG_IFACE_HOOK_INET6 },
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{ AF_APPLETALK, NG_IFACE_HOOK_ATALK },
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{ AF_IPX, NG_IFACE_HOOK_IPX },
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{ AF_ATM, NG_IFACE_HOOK_ATM },
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{ AF_NATM, NG_IFACE_HOOK_NATM },
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{ AF_NS, NG_IFACE_HOOK_NS },
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};
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#define NUM_FAMILIES (sizeof(gFamilies) / sizeof(*gFamilies))
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/* Node private data */
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struct ng_iface_private {
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struct ifnet *ifp; /* Our interface */
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int unit; /* Interface unit number */
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node_p node; /* Our netgraph node */
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hook_p hooks[NUM_FAMILIES]; /* Hook for each address family */
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};
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typedef struct ng_iface_private *priv_p;
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/* Interface methods */
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static void ng_iface_start(struct ifnet *ifp);
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static int ng_iface_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data);
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static int ng_iface_output(struct ifnet *ifp, struct mbuf *m0,
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struct sockaddr *dst, struct rtentry *rt0);
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static void ng_iface_bpftap(struct ifnet *ifp,
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struct mbuf *m, sa_family_t family);
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#ifdef DEBUG
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static void ng_iface_print_ioctl(struct ifnet *ifp, int cmd, caddr_t data);
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#endif
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/* Netgraph methods */
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static ng_constructor_t ng_iface_constructor;
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static ng_rcvmsg_t ng_iface_rcvmsg;
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static ng_shutdown_t ng_iface_rmnode;
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static ng_newhook_t ng_iface_newhook;
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static ng_rcvdata_t ng_iface_rcvdata;
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static ng_disconnect_t ng_iface_disconnect;
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/* Helper stuff */
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static iffam_p get_iffam_from_af(sa_family_t family);
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static iffam_p get_iffam_from_hook(priv_p priv, hook_p hook);
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static iffam_p get_iffam_from_name(const char *name);
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static hook_p *get_hook_from_iffam(priv_p priv, iffam_p iffam);
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/* Parse type for struct ng_iface_ifname */
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static const struct ng_parse_fixedstring_info ng_iface_ifname_info = {
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NG_IFACE_IFACE_NAME_MAX + 1
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};
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static const struct ng_parse_type ng_iface_ifname_type = {
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&ng_parse_fixedstring_type,
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&ng_iface_ifname_info
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};
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/* Parse type for struct ng_cisco_ipaddr */
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static const struct ng_parse_struct_info
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ng_cisco_ipaddr_type_info = NG_CISCO_IPADDR_TYPE_INFO;
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static const struct ng_parse_type ng_cisco_ipaddr_type = {
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&ng_parse_struct_type,
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&ng_cisco_ipaddr_type_info
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};
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/* List of commands and how to convert arguments to/from ASCII */
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static const struct ng_cmdlist ng_iface_cmds[] = {
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{
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NGM_IFACE_COOKIE,
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NGM_IFACE_GET_IFNAME,
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"getifname",
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NULL,
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&ng_iface_ifname_type
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},
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{
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NGM_IFACE_COOKIE,
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NGM_IFACE_POINT2POINT,
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"point2point",
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NULL,
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NULL
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},
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{
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NGM_IFACE_COOKIE,
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NGM_IFACE_BROADCAST,
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"broadcast",
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NULL,
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NULL
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},
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{
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NGM_CISCO_COOKIE,
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NGM_CISCO_GET_IPADDR,
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"getipaddr",
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NULL,
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&ng_cisco_ipaddr_type
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},
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{ 0 }
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};
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/* Node type descriptor */
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static struct ng_type typestruct = {
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NG_VERSION,
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NG_IFACE_NODE_TYPE,
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NULL,
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ng_iface_constructor,
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ng_iface_rcvmsg,
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ng_iface_rmnode,
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ng_iface_newhook,
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NULL,
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NULL,
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ng_iface_rcvdata,
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ng_iface_rcvdata,
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ng_iface_disconnect,
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ng_iface_cmds
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};
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NETGRAPH_INIT(iface, &typestruct);
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/* We keep a bitmap indicating which unit numbers are free.
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One means the unit number is free, zero means it's taken. */
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static int *ng_iface_units = NULL;
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static int ng_iface_units_len = 0;
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#define UNITS_BITSPERWORD (sizeof(*ng_iface_units) * NBBY)
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/************************************************************************
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HELPER STUFF
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************************************************************************/
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/*
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* Get the family descriptor from the family ID
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*/
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static __inline__ iffam_p
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get_iffam_from_af(sa_family_t family)
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{
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iffam_p iffam;
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int k;
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for (k = 0; k < NUM_FAMILIES; k++) {
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iffam = &gFamilies[k];
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if (iffam->family == family)
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return (iffam);
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}
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return (NULL);
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}
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/*
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* Get the family descriptor from the hook
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*/
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static __inline__ iffam_p
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get_iffam_from_hook(priv_p priv, hook_p hook)
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{
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int k;
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for (k = 0; k < NUM_FAMILIES; k++)
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if (priv->hooks[k] == hook)
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return (&gFamilies[k]);
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return (NULL);
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}
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/*
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* Get the hook from the iffam descriptor
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*/
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static __inline__ hook_p *
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get_hook_from_iffam(priv_p priv, iffam_p iffam)
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{
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return (&priv->hooks[iffam - gFamilies]);
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}
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/*
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* Get the iffam descriptor from the name
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*/
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static __inline__ iffam_p
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get_iffam_from_name(const char *name)
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{
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iffam_p iffam;
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int k;
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for (k = 0; k < NUM_FAMILIES; k++) {
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iffam = &gFamilies[k];
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if (!strcmp(iffam->hookname, name))
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return (iffam);
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}
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return (NULL);
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}
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/*
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* Find the first free unit number for a new interface.
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* Increase the size of the unit bitmap as necessary.
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*/
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static __inline__ int
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ng_iface_get_unit(int *unit)
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{
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int index, bit;
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for (index = 0; index < ng_iface_units_len
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&& ng_iface_units[index] == 0; index++);
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if (index == ng_iface_units_len) { /* extend array */
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int i, *newarray, newlen;
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newlen = (2 * ng_iface_units_len) + 4;
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MALLOC(newarray, int *, newlen * sizeof(*ng_iface_units),
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M_NETGRAPH, M_NOWAIT);
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if (newarray == NULL)
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return (ENOMEM);
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bcopy(ng_iface_units, newarray,
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ng_iface_units_len * sizeof(*ng_iface_units));
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for (i = ng_iface_units_len; i < newlen; i++)
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newarray[i] = ~0;
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if (ng_iface_units != NULL)
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FREE(ng_iface_units, M_NETGRAPH);
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ng_iface_units = newarray;
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ng_iface_units_len = newlen;
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}
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bit = ffs(ng_iface_units[index]) - 1;
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KASSERT(bit >= 0 && bit <= UNITS_BITSPERWORD - 1,
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("%s: word=%d bit=%d", __FUNCTION__, ng_iface_units[index], bit));
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ng_iface_units[index] &= ~(1 << bit);
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*unit = (index * UNITS_BITSPERWORD) + bit;
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return (0);
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}
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/*
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* Free a no longer needed unit number.
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*/
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static __inline__ void
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ng_iface_free_unit(int unit)
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{
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int index, bit;
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index = unit / UNITS_BITSPERWORD;
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bit = unit % UNITS_BITSPERWORD;
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KASSERT(index < ng_iface_units_len,
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("%s: unit=%d len=%d", __FUNCTION__, unit, ng_iface_units_len));
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KASSERT((ng_iface_units[index] & (1 << bit)) == 0,
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("%s: unit=%d is free", __FUNCTION__, unit));
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ng_iface_units[index] |= (1 << bit);
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/*
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* XXX We could think about reducing the size of ng_iface_units[]
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* XXX here if the last portion is all ones
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*/
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}
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/************************************************************************
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INTERFACE STUFF
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************************************************************************/
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/*
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* Process an ioctl for the virtual interface
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*/
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static int
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ng_iface_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
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{
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struct ifreq *const ifr = (struct ifreq *) data;
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int s, error = 0;
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#ifdef DEBUG
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ng_iface_print_ioctl(ifp, command, data);
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#endif
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s = splimp();
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switch (command) {
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/* These two are mostly handled at a higher layer */
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case SIOCSIFADDR:
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ifp->if_flags |= (IFF_UP | IFF_RUNNING);
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ifp->if_flags &= ~(IFF_OACTIVE);
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break;
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case SIOCGIFADDR:
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break;
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/* Set flags */
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case SIOCSIFFLAGS:
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/*
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* If the interface is marked up and stopped, then start it.
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* If it is marked down and running, then stop it.
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*/
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if (ifr->ifr_flags & IFF_UP) {
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if (!(ifp->if_flags & IFF_RUNNING)) {
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ifp->if_flags &= ~(IFF_OACTIVE);
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ifp->if_flags |= IFF_RUNNING;
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}
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} else {
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if (ifp->if_flags & IFF_RUNNING)
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ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
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}
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break;
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/* Set the interface MTU */
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case SIOCSIFMTU:
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if (ifr->ifr_mtu > NG_IFACE_MTU_MAX
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|| ifr->ifr_mtu < NG_IFACE_MTU_MIN)
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error = EINVAL;
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else
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ifp->if_mtu = ifr->ifr_mtu;
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break;
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/* Stuff that's not supported */
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case SIOCADDMULTI:
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case SIOCDELMULTI:
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error = 0;
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break;
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case SIOCSIFPHYS:
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error = EOPNOTSUPP;
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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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(void) splx(s);
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return (error);
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}
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/*
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* This routine is called to deliver a packet out the interface.
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* We simply look at the address family and relay the packet to
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* the corresponding hook, if it exists and is connected.
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*/
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static int
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ng_iface_output(struct ifnet *ifp, struct mbuf *m,
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struct sockaddr *dst, struct rtentry *rt0)
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{
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const priv_p priv = (priv_p) ifp->if_softc;
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const iffam_p iffam = get_iffam_from_af(dst->sa_family);
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meta_p meta = NULL;
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int len, error = 0;
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|
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/* Check interface flags */
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if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) {
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m_freem(m);
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return (ENETDOWN);
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}
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|
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/* BPF writes need to be handled specially */
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if (dst->sa_family == AF_UNSPEC) {
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if (m->m_len < 4 && (m = m_pullup(m, 4)) == NULL)
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return (ENOBUFS);
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dst->sa_family = (sa_family_t)*mtod(m, int32_t *);
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m->m_data += 4;
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m->m_len -= 4;
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m->m_pkthdr.len -= 4;
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}
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/* Berkeley packet filter */
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ng_iface_bpftap(ifp, m, dst->sa_family);
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|
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/* Check address family to determine hook (if known) */
|
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if (iffam == NULL) {
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m_freem(m);
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log(LOG_WARNING, "%s%d: can't handle af%d\n",
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ifp->if_name, ifp->if_unit, (int)dst->sa_family);
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return (EAFNOSUPPORT);
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}
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|
|
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/* Copy length before the mbuf gets invalidated */
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len = m->m_pkthdr.len;
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|
|
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/* Send packet; if hook is not connected, mbuf will get freed. */
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NG_SEND_DATA(error, *get_hook_from_iffam(priv, iffam), m, meta);
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|
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/* Update stats */
|
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if (error == 0) {
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ifp->if_obytes += len;
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ifp->if_opackets++;
|
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}
|
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return (error);
|
|
}
|
|
|
|
/*
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|
* This routine should never be called
|
|
*/
|
|
|
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static void
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ng_iface_start(struct ifnet *ifp)
|
|
{
|
|
printf("%s%d: %s called?", ifp->if_name, ifp->if_unit, __FUNCTION__);
|
|
}
|
|
|
|
/*
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|
* Flash a packet by the BPF (requires prepending 4 byte AF header)
|
|
* Note the phoney mbuf; this is OK because BPF treats it read-only.
|
|
*/
|
|
static void
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ng_iface_bpftap(struct ifnet *ifp, struct mbuf *m, sa_family_t family)
|
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{
|
|
int32_t family4 = (int32_t)family;
|
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struct mbuf m0;
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|
|
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KASSERT(family != AF_UNSPEC, ("%s: family=AF_UNSPEC", __FUNCTION__));
|
|
if (ifp->if_bpf != NULL) {
|
|
bzero(&m0, sizeof(m0));
|
|
m0.m_next = m;
|
|
m0.m_len = sizeof(family4);
|
|
m0.m_data = (char *)&family4;
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|
bpf_mtap(ifp, &m0);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/*
|
|
* Display an ioctl to the virtual interface
|
|
*/
|
|
|
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static void
|
|
ng_iface_print_ioctl(struct ifnet *ifp, int command, caddr_t data)
|
|
{
|
|
char *str;
|
|
|
|
switch (command & IOC_DIRMASK) {
|
|
case IOC_VOID:
|
|
str = "IO";
|
|
break;
|
|
case IOC_OUT:
|
|
str = "IOR";
|
|
break;
|
|
case IOC_IN:
|
|
str = "IOW";
|
|
break;
|
|
case IOC_INOUT:
|
|
str = "IORW";
|
|
break;
|
|
default:
|
|
str = "IO??";
|
|
}
|
|
log(LOG_DEBUG, "%s%d: %s('%c', %d, char[%d])\n",
|
|
ifp->if_name, ifp->if_unit,
|
|
str,
|
|
IOCGROUP(command),
|
|
command & 0xff,
|
|
IOCPARM_LEN(command));
|
|
}
|
|
#endif /* DEBUG */
|
|
|
|
/************************************************************************
|
|
NETGRAPH NODE STUFF
|
|
************************************************************************/
|
|
|
|
/*
|
|
* Constructor for a node
|
|
*/
|
|
static int
|
|
ng_iface_constructor(node_p *nodep)
|
|
{
|
|
char ifname[NG_IFACE_IFACE_NAME_MAX + 1];
|
|
struct ifnet *ifp;
|
|
node_p node;
|
|
priv_p priv;
|
|
int error = 0;
|
|
|
|
/* Allocate node and interface private structures */
|
|
MALLOC(priv, priv_p, sizeof(*priv), M_NETGRAPH, M_NOWAIT);
|
|
if (priv == NULL)
|
|
return (ENOMEM);
|
|
bzero(priv, sizeof(*priv));
|
|
MALLOC(ifp, struct ifnet *, sizeof(*ifp), M_NETGRAPH, M_NOWAIT);
|
|
if (ifp == NULL) {
|
|
FREE(priv, M_NETGRAPH);
|
|
return (ENOMEM);
|
|
}
|
|
bzero(ifp, sizeof(*ifp));
|
|
|
|
/* Link them together */
|
|
ifp->if_softc = priv;
|
|
priv->ifp = ifp;
|
|
|
|
/* Get an interface unit number */
|
|
if ((error = ng_iface_get_unit(&priv->unit)) != 0) {
|
|
FREE(ifp, M_NETGRAPH);
|
|
FREE(priv, M_NETGRAPH);
|
|
return (error);
|
|
}
|
|
|
|
/* Call generic node constructor */
|
|
if ((error = ng_make_node_common(&typestruct, nodep)) != 0) {
|
|
ng_iface_free_unit(priv->unit);
|
|
FREE(ifp, M_NETGRAPH);
|
|
FREE(priv, M_NETGRAPH);
|
|
return (error);
|
|
}
|
|
node = *nodep;
|
|
|
|
/* Link together node and private info */
|
|
node->private = priv;
|
|
priv->node = node;
|
|
|
|
/* Initialize interface structure */
|
|
ifp->if_name = NG_IFACE_IFACE_NAME;
|
|
ifp->if_unit = priv->unit;
|
|
ifp->if_output = ng_iface_output;
|
|
ifp->if_start = ng_iface_start;
|
|
ifp->if_ioctl = ng_iface_ioctl;
|
|
ifp->if_watchdog = NULL;
|
|
ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
|
|
ifp->if_mtu = NG_IFACE_MTU_DEFAULT;
|
|
ifp->if_flags = (IFF_SIMPLEX|IFF_POINTOPOINT|IFF_NOARP|IFF_MULTICAST);
|
|
ifp->if_type = IFT_PROPVIRTUAL; /* XXX */
|
|
ifp->if_addrlen = 0; /* XXX */
|
|
ifp->if_hdrlen = 0; /* XXX */
|
|
ifp->if_baudrate = 64000; /* XXX */
|
|
TAILQ_INIT(&ifp->if_addrhead);
|
|
|
|
/* Give this node the same name as the interface (if possible) */
|
|
bzero(ifname, sizeof(ifname));
|
|
snprintf(ifname, sizeof(ifname), "%s%d", ifp->if_name, ifp->if_unit);
|
|
if (ng_name_node(node, ifname) != 0)
|
|
log(LOG_WARNING, "%s: can't acquire netgraph name\n", ifname);
|
|
|
|
/* Attach the interface */
|
|
if_attach(ifp);
|
|
bpfattach(ifp, DLT_NULL, sizeof(u_int));
|
|
|
|
/* Done */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Give our ok for a hook to be added
|
|
*/
|
|
static int
|
|
ng_iface_newhook(node_p node, hook_p hook, const char *name)
|
|
{
|
|
const iffam_p iffam = get_iffam_from_name(name);
|
|
hook_p *hookptr;
|
|
|
|
if (iffam == NULL)
|
|
return (EPFNOSUPPORT);
|
|
hookptr = get_hook_from_iffam((priv_p) node->private, iffam);
|
|
if (*hookptr != NULL)
|
|
return (EISCONN);
|
|
*hookptr = hook;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Receive a control message
|
|
*/
|
|
static int
|
|
ng_iface_rcvmsg(node_p node, struct ng_mesg *msg,
|
|
const char *retaddr, struct ng_mesg **rptr, hook_p lasthook)
|
|
{
|
|
const priv_p priv = node->private;
|
|
struct ifnet *const ifp = priv->ifp;
|
|
struct ng_mesg *resp = NULL;
|
|
int error = 0;
|
|
|
|
switch (msg->header.typecookie) {
|
|
case NGM_IFACE_COOKIE:
|
|
switch (msg->header.cmd) {
|
|
case NGM_IFACE_GET_IFNAME:
|
|
{
|
|
struct ng_iface_ifname *arg;
|
|
|
|
NG_MKRESPONSE(resp, msg, sizeof(*arg), M_NOWAIT);
|
|
if (resp == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
arg = (struct ng_iface_ifname *)resp->data;
|
|
snprintf(arg->ngif_name, sizeof(arg->ngif_name),
|
|
"%s%d", ifp->if_name, ifp->if_unit);
|
|
break;
|
|
}
|
|
|
|
case NGM_IFACE_POINT2POINT:
|
|
case NGM_IFACE_BROADCAST:
|
|
{
|
|
|
|
/* Deny request if interface is UP */
|
|
if ((ifp->if_flags & IFF_UP) != 0)
|
|
return (EBUSY);
|
|
|
|
/* Change flags */
|
|
switch (msg->header.cmd) {
|
|
case NGM_IFACE_POINT2POINT:
|
|
ifp->if_flags |= IFF_POINTOPOINT;
|
|
ifp->if_flags &= ~IFF_BROADCAST;
|
|
break;
|
|
case NGM_IFACE_BROADCAST:
|
|
ifp->if_flags &= ~IFF_POINTOPOINT;
|
|
ifp->if_flags |= IFF_BROADCAST;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
break;
|
|
case NGM_CISCO_COOKIE:
|
|
switch (msg->header.cmd) {
|
|
case NGM_CISCO_GET_IPADDR: /* we understand this too */
|
|
{
|
|
struct ifaddr *ifa;
|
|
|
|
/* Return the first configured IP address */
|
|
TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
|
|
struct ng_cisco_ipaddr *ips;
|
|
|
|
if (ifa->ifa_addr->sa_family != AF_INET)
|
|
continue;
|
|
NG_MKRESPONSE(resp, msg, sizeof(ips), M_NOWAIT);
|
|
if (resp == NULL) {
|
|
error = ENOMEM;
|
|
break;
|
|
}
|
|
ips = (struct ng_cisco_ipaddr *)resp->data;
|
|
ips->ipaddr = ((struct sockaddr_in *)
|
|
ifa->ifa_addr)->sin_addr;
|
|
ips->netmask = ((struct sockaddr_in *)
|
|
ifa->ifa_netmask)->sin_addr;
|
|
break;
|
|
}
|
|
|
|
/* No IP addresses on this interface? */
|
|
if (ifa == NULL)
|
|
error = EADDRNOTAVAIL;
|
|
break;
|
|
}
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
if (rptr)
|
|
*rptr = resp;
|
|
else if (resp)
|
|
FREE(resp, M_NETGRAPH);
|
|
FREE(msg, M_NETGRAPH);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Recive data from a hook. Pass the packet to the correct input routine.
|
|
*/
|
|
static int
|
|
ng_iface_rcvdata(hook_p hook, struct mbuf *m, meta_p meta,
|
|
struct mbuf **ret_m, meta_p *ret_meta)
|
|
{
|
|
const priv_p priv = hook->node->private;
|
|
const iffam_p iffam = get_iffam_from_hook(priv, hook);
|
|
struct ifnet *const ifp = priv->ifp;
|
|
|
|
/* Sanity checks */
|
|
KASSERT(iffam != NULL, ("%s: iffam", __FUNCTION__));
|
|
KASSERT(m->m_flags & M_PKTHDR, ("%s: not pkthdr", __FUNCTION__));
|
|
if (m == NULL)
|
|
return (EINVAL);
|
|
if ((ifp->if_flags & IFF_UP) == 0) {
|
|
NG_FREE_DATA(m, meta);
|
|
return (ENETDOWN);
|
|
}
|
|
|
|
/* Update interface stats */
|
|
ifp->if_ipackets++;
|
|
ifp->if_ibytes += m->m_pkthdr.len;
|
|
|
|
/* Note receiving interface */
|
|
m->m_pkthdr.rcvif = ifp;
|
|
|
|
/* Berkeley packet filter */
|
|
ng_iface_bpftap(ifp, m, iffam->family);
|
|
|
|
/* Ignore any meta-data */
|
|
NG_FREE_META(meta);
|
|
|
|
/* Send packet */
|
|
return family_enqueue(iffam->family, m);
|
|
}
|
|
|
|
/*
|
|
* Shutdown and remove the node and its associated interface.
|
|
*/
|
|
static int
|
|
ng_iface_rmnode(node_p node)
|
|
{
|
|
const priv_p priv = node->private;
|
|
|
|
ng_cutlinks(node);
|
|
ng_unname(node);
|
|
bpfdetach(priv->ifp);
|
|
if_detach(priv->ifp);
|
|
priv->ifp = NULL;
|
|
ng_iface_free_unit(priv->unit);
|
|
FREE(priv, M_NETGRAPH);
|
|
node->private = NULL;
|
|
ng_unref(node);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Hook disconnection. Note that we do *not* shutdown when all
|
|
* hooks have been disconnected.
|
|
*/
|
|
static int
|
|
ng_iface_disconnect(hook_p hook)
|
|
{
|
|
const priv_p priv = hook->node->private;
|
|
const iffam_p iffam = get_iffam_from_hook(priv, hook);
|
|
|
|
if (iffam == NULL)
|
|
panic(__FUNCTION__);
|
|
*get_hook_from_iffam(priv, iffam) = NULL;
|
|
return (0);
|
|
}
|
|
|