1
2/*
3 * ng_ether.c
4 */
5
6/*-
7 * Copyright (c) 1996-2000 Whistle Communications, Inc.
8 * All rights reserved.
9 *
10 * Subject to the following obligations and disclaimer of warranty, use and
11 * redistribution of this software, in source or object code forms, with or
12 * without modifications are expressly permitted by Whistle Communications;
13 * provided, however, that:
14 * 1. Any and all reproductions of the source or object code must include the
15 * copyright notice above and the following disclaimer of warranties; and
16 * 2. No rights are granted, in any manner or form, to use Whistle
17 * Communications, Inc. trademarks, including the mark "WHISTLE
18 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
19 * such appears in the above copyright notice or in the software.
20 *
21 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
22 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
23 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
24 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
26 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
27 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
28 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
29 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
30 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
31 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
32 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
33 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
37 * OF SUCH DAMAGE.
38 *
39 * Authors: Archie Cobbs <archie@freebsd.org>
40 * Julian Elischer <julian@freebsd.org>
41 *
| 1
2/*
3 * ng_ether.c
4 */
5
6/*-
7 * Copyright (c) 1996-2000 Whistle Communications, Inc.
8 * All rights reserved.
9 *
10 * Subject to the following obligations and disclaimer of warranty, use and
11 * redistribution of this software, in source or object code forms, with or
12 * without modifications are expressly permitted by Whistle Communications;
13 * provided, however, that:
14 * 1. Any and all reproductions of the source or object code must include the
15 * copyright notice above and the following disclaimer of warranties; and
16 * 2. No rights are granted, in any manner or form, to use Whistle
17 * Communications, Inc. trademarks, including the mark "WHISTLE
18 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as
19 * such appears in the above copyright notice or in the software.
20 *
21 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
22 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
23 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
24 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
26 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
27 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
28 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
29 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
30 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
31 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
32 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
33 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
36 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
37 * OF SUCH DAMAGE.
38 *
39 * Authors: Archie Cobbs <archie@freebsd.org>
40 * Julian Elischer <julian@freebsd.org>
41 *
|
42 * $FreeBSD: head/sys/netgraph/ng_ether.c 196019 2009-08-01 19:26:27Z rwatson $
| 42 * $FreeBSD: head/sys/netgraph/ng_ether.c 201924 2010-01-09 19:03:48Z fjoe $
|
43 */
44
45/*
46 * ng_ether(4) netgraph node type
47 */
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/kernel.h>
52#include <sys/malloc.h>
53#include <sys/mbuf.h>
54#include <sys/errno.h>
55#include <sys/proc.h>
56#include <sys/syslog.h>
57#include <sys/socket.h>
58
59#include <net/if.h>
60#include <net/if_dl.h>
61#include <net/if_types.h>
62#include <net/if_arp.h>
63#include <net/if_var.h>
64#include <net/ethernet.h>
65#include <net/if_bridgevar.h>
66#include <net/vnet.h>
67
68#include <netgraph/ng_message.h>
69#include <netgraph/netgraph.h>
70#include <netgraph/ng_parse.h>
71#include <netgraph/ng_ether.h>
72
73#define IFP2NG(ifp) (IFP2AC((ifp))->ac_netgraph)
74
75/* Per-node private data */
76struct private {
77 struct ifnet *ifp; /* associated interface */
78 hook_p upper; /* upper hook connection */
79 hook_p lower; /* lower hook connection */
80 hook_p orphan; /* orphan hook connection */
81 u_char autoSrcAddr; /* always overwrite source address */
82 u_char promisc; /* promiscuous mode enabled */
83 u_long hwassist; /* hardware checksum capabilities */
84 u_int flags; /* flags e.g. really die */
85};
86typedef struct private *priv_p;
87
88/* Hook pointers used by if_ethersubr.c to callback to netgraph */
89extern void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
90extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
91extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
92extern void (*ng_ether_attach_p)(struct ifnet *ifp);
93extern void (*ng_ether_detach_p)(struct ifnet *ifp);
94extern void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
95
96/* Functional hooks called from if_ethersubr.c */
97static void ng_ether_input(struct ifnet *ifp, struct mbuf **mp);
98static void ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m);
99static int ng_ether_output(struct ifnet *ifp, struct mbuf **mp);
100static void ng_ether_attach(struct ifnet *ifp);
101static void ng_ether_detach(struct ifnet *ifp);
102static void ng_ether_link_state(struct ifnet *ifp, int state);
103
104/* Other functions */
105static int ng_ether_rcv_lower(hook_p node, item_p item);
106static int ng_ether_rcv_upper(hook_p node, item_p item);
107
108/* Netgraph node methods */
109static ng_constructor_t ng_ether_constructor;
110static ng_rcvmsg_t ng_ether_rcvmsg;
111static ng_shutdown_t ng_ether_shutdown;
112static ng_newhook_t ng_ether_newhook;
113static ng_rcvdata_t ng_ether_rcvdata;
114static ng_disconnect_t ng_ether_disconnect;
115static int ng_ether_mod_event(module_t mod, int event, void *data);
116
117/* List of commands and how to convert arguments to/from ASCII */
118static const struct ng_cmdlist ng_ether_cmdlist[] = {
119 {
120 NGM_ETHER_COOKIE,
121 NGM_ETHER_GET_IFNAME,
122 "getifname",
123 NULL,
124 &ng_parse_string_type
125 },
126 {
127 NGM_ETHER_COOKIE,
128 NGM_ETHER_GET_IFINDEX,
129 "getifindex",
130 NULL,
131 &ng_parse_int32_type
132 },
133 {
134 NGM_ETHER_COOKIE,
135 NGM_ETHER_GET_ENADDR,
136 "getenaddr",
137 NULL,
138 &ng_parse_enaddr_type
139 },
140 {
141 NGM_ETHER_COOKIE,
142 NGM_ETHER_SET_ENADDR,
143 "setenaddr",
144 &ng_parse_enaddr_type,
145 NULL
146 },
147 {
148 NGM_ETHER_COOKIE,
149 NGM_ETHER_GET_PROMISC,
150 "getpromisc",
151 NULL,
152 &ng_parse_int32_type
153 },
154 {
155 NGM_ETHER_COOKIE,
156 NGM_ETHER_SET_PROMISC,
157 "setpromisc",
158 &ng_parse_int32_type,
159 NULL
160 },
161 {
162 NGM_ETHER_COOKIE,
163 NGM_ETHER_GET_AUTOSRC,
164 "getautosrc",
165 NULL,
166 &ng_parse_int32_type
167 },
168 {
169 NGM_ETHER_COOKIE,
170 NGM_ETHER_SET_AUTOSRC,
171 "setautosrc",
172 &ng_parse_int32_type,
173 NULL
174 },
175 {
176 NGM_ETHER_COOKIE,
177 NGM_ETHER_ADD_MULTI,
178 "addmulti",
179 &ng_parse_enaddr_type,
180 NULL
181 },
182 {
183 NGM_ETHER_COOKIE,
184 NGM_ETHER_DEL_MULTI,
185 "delmulti",
186 &ng_parse_enaddr_type,
187 NULL
188 },
189 {
190 NGM_ETHER_COOKIE,
191 NGM_ETHER_DETACH,
192 "detach",
193 NULL,
194 NULL
195 },
196 { 0 }
197};
198
199static struct ng_type ng_ether_typestruct = {
200 .version = NG_ABI_VERSION,
201 .name = NG_ETHER_NODE_TYPE,
202 .mod_event = ng_ether_mod_event,
203 .constructor = ng_ether_constructor,
204 .rcvmsg = ng_ether_rcvmsg,
205 .shutdown = ng_ether_shutdown,
206 .newhook = ng_ether_newhook,
207 .rcvdata = ng_ether_rcvdata,
208 .disconnect = ng_ether_disconnect,
209 .cmdlist = ng_ether_cmdlist,
210};
211NETGRAPH_INIT(ether, &ng_ether_typestruct);
212
213/******************************************************************
214 ETHERNET FUNCTION HOOKS
215******************************************************************/
216
217/*
218 * Handle a packet that has come in on an interface. We get to
219 * look at it here before any upper layer protocols do.
220 *
221 * NOTE: this function will get called at splimp()
222 */
223static void
224ng_ether_input(struct ifnet *ifp, struct mbuf **mp)
225{
226 const node_p node = IFP2NG(ifp);
227 const priv_p priv = NG_NODE_PRIVATE(node);
228 int error;
229
230 /* If "lower" hook not connected, let packet continue */
231 if (priv->lower == NULL)
232 return;
233 NG_SEND_DATA_ONLY(error, priv->lower, *mp); /* sets *mp = NULL */
234}
235
236/*
237 * Handle a packet that has come in on an interface, and which
238 * does not match any of our known protocols (an ``orphan'').
239 *
240 * NOTE: this function will get called at splimp()
241 */
242static void
243ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m)
244{
245 const node_p node = IFP2NG(ifp);
246 const priv_p priv = NG_NODE_PRIVATE(node);
247 int error;
248
249 /* If "orphan" hook not connected, discard packet */
250 if (priv->orphan == NULL) {
251 m_freem(m);
252 return;
253 }
254 NG_SEND_DATA_ONLY(error, priv->orphan, m);
255}
256
257/*
258 * Handle a packet that is going out on an interface.
259 * The Ethernet header is already attached to the mbuf.
260 */
261static int
262ng_ether_output(struct ifnet *ifp, struct mbuf **mp)
263{
264 const node_p node = IFP2NG(ifp);
265 const priv_p priv = NG_NODE_PRIVATE(node);
266 int error = 0;
267
268 /* If "upper" hook not connected, let packet continue */
269 if (priv->upper == NULL)
270 return (0);
271
272 /* Send it out "upper" hook */
273 NG_OUTBOUND_THREAD_REF();
274 NG_SEND_DATA_ONLY(error, priv->upper, *mp);
275 NG_OUTBOUND_THREAD_UNREF();
276 return (error);
277}
278
279/*
280 * A new Ethernet interface has been attached.
281 * Create a new node for it, etc.
282 */
283static void
284ng_ether_attach(struct ifnet *ifp)
285{
286 priv_p priv;
287 node_p node;
288
289 /*
290 * Do not create / attach an ether node to this ifnet if
291 * a netgraph node with the same name already exists.
292 * This should prevent ether nodes to become attached to
293 * eiface nodes, which may be problematic due to naming
294 * clashes.
295 */
296 if ((node = ng_name2noderef(NULL, ifp->if_xname)) != NULL) {
297 NG_NODE_UNREF(node);
298 return;
299 }
300
301 /* Create node */
302 KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__));
303 if (ng_make_node_common(&ng_ether_typestruct, &node) != 0) {
304 log(LOG_ERR, "%s: can't %s for %s\n",
305 __func__, "create node", ifp->if_xname);
306 return;
307 }
308
309 /* Allocate private data */
310 priv = malloc(sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
311 if (priv == NULL) {
312 log(LOG_ERR, "%s: can't %s for %s\n",
313 __func__, "allocate memory", ifp->if_xname);
314 NG_NODE_UNREF(node);
315 return;
316 }
317 NG_NODE_SET_PRIVATE(node, priv);
318 priv->ifp = ifp;
319 IFP2NG(ifp) = node;
320 priv->hwassist = ifp->if_hwassist;
321
322 /* Try to give the node the same name as the interface */
323 if (ng_name_node(node, ifp->if_xname) != 0) {
324 log(LOG_WARNING, "%s: can't name node %s\n",
325 __func__, ifp->if_xname);
326 }
327}
328
329/*
330 * An Ethernet interface is being detached.
331 * REALLY Destroy its node.
332 */
333static void
334ng_ether_detach(struct ifnet *ifp)
335{
336 const node_p node = IFP2NG(ifp);
337 const priv_p priv = NG_NODE_PRIVATE(node);
338
339 NG_NODE_REALLY_DIE(node); /* Force real removal of node */
340 /*
341 * We can't assume the ifnet is still around when we run shutdown
342 * So zap it now. XXX We HOPE that anything running at this time
343 * handles it (as it should in the non netgraph case).
344 */
345 IFP2NG(ifp) = NULL;
346 priv->ifp = NULL; /* XXX race if interrupted an output packet */
347 ng_rmnode_self(node); /* remove all netgraph parts */
348}
349
350/*
351 * Notify graph about link event.
352 * if_link_state_change() has already checked that the state has changed.
353 */
354static void
355ng_ether_link_state(struct ifnet *ifp, int state)
356{
357 const node_p node = IFP2NG(ifp);
358 const priv_p priv = NG_NODE_PRIVATE(node);
359 struct ng_mesg *msg;
360 int cmd, dummy_error = 0;
361
| 43 */
44
45/*
46 * ng_ether(4) netgraph node type
47 */
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/kernel.h>
52#include <sys/malloc.h>
53#include <sys/mbuf.h>
54#include <sys/errno.h>
55#include <sys/proc.h>
56#include <sys/syslog.h>
57#include <sys/socket.h>
58
59#include <net/if.h>
60#include <net/if_dl.h>
61#include <net/if_types.h>
62#include <net/if_arp.h>
63#include <net/if_var.h>
64#include <net/ethernet.h>
65#include <net/if_bridgevar.h>
66#include <net/vnet.h>
67
68#include <netgraph/ng_message.h>
69#include <netgraph/netgraph.h>
70#include <netgraph/ng_parse.h>
71#include <netgraph/ng_ether.h>
72
73#define IFP2NG(ifp) (IFP2AC((ifp))->ac_netgraph)
74
75/* Per-node private data */
76struct private {
77 struct ifnet *ifp; /* associated interface */
78 hook_p upper; /* upper hook connection */
79 hook_p lower; /* lower hook connection */
80 hook_p orphan; /* orphan hook connection */
81 u_char autoSrcAddr; /* always overwrite source address */
82 u_char promisc; /* promiscuous mode enabled */
83 u_long hwassist; /* hardware checksum capabilities */
84 u_int flags; /* flags e.g. really die */
85};
86typedef struct private *priv_p;
87
88/* Hook pointers used by if_ethersubr.c to callback to netgraph */
89extern void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
90extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
91extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
92extern void (*ng_ether_attach_p)(struct ifnet *ifp);
93extern void (*ng_ether_detach_p)(struct ifnet *ifp);
94extern void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
95
96/* Functional hooks called from if_ethersubr.c */
97static void ng_ether_input(struct ifnet *ifp, struct mbuf **mp);
98static void ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m);
99static int ng_ether_output(struct ifnet *ifp, struct mbuf **mp);
100static void ng_ether_attach(struct ifnet *ifp);
101static void ng_ether_detach(struct ifnet *ifp);
102static void ng_ether_link_state(struct ifnet *ifp, int state);
103
104/* Other functions */
105static int ng_ether_rcv_lower(hook_p node, item_p item);
106static int ng_ether_rcv_upper(hook_p node, item_p item);
107
108/* Netgraph node methods */
109static ng_constructor_t ng_ether_constructor;
110static ng_rcvmsg_t ng_ether_rcvmsg;
111static ng_shutdown_t ng_ether_shutdown;
112static ng_newhook_t ng_ether_newhook;
113static ng_rcvdata_t ng_ether_rcvdata;
114static ng_disconnect_t ng_ether_disconnect;
115static int ng_ether_mod_event(module_t mod, int event, void *data);
116
117/* List of commands and how to convert arguments to/from ASCII */
118static const struct ng_cmdlist ng_ether_cmdlist[] = {
119 {
120 NGM_ETHER_COOKIE,
121 NGM_ETHER_GET_IFNAME,
122 "getifname",
123 NULL,
124 &ng_parse_string_type
125 },
126 {
127 NGM_ETHER_COOKIE,
128 NGM_ETHER_GET_IFINDEX,
129 "getifindex",
130 NULL,
131 &ng_parse_int32_type
132 },
133 {
134 NGM_ETHER_COOKIE,
135 NGM_ETHER_GET_ENADDR,
136 "getenaddr",
137 NULL,
138 &ng_parse_enaddr_type
139 },
140 {
141 NGM_ETHER_COOKIE,
142 NGM_ETHER_SET_ENADDR,
143 "setenaddr",
144 &ng_parse_enaddr_type,
145 NULL
146 },
147 {
148 NGM_ETHER_COOKIE,
149 NGM_ETHER_GET_PROMISC,
150 "getpromisc",
151 NULL,
152 &ng_parse_int32_type
153 },
154 {
155 NGM_ETHER_COOKIE,
156 NGM_ETHER_SET_PROMISC,
157 "setpromisc",
158 &ng_parse_int32_type,
159 NULL
160 },
161 {
162 NGM_ETHER_COOKIE,
163 NGM_ETHER_GET_AUTOSRC,
164 "getautosrc",
165 NULL,
166 &ng_parse_int32_type
167 },
168 {
169 NGM_ETHER_COOKIE,
170 NGM_ETHER_SET_AUTOSRC,
171 "setautosrc",
172 &ng_parse_int32_type,
173 NULL
174 },
175 {
176 NGM_ETHER_COOKIE,
177 NGM_ETHER_ADD_MULTI,
178 "addmulti",
179 &ng_parse_enaddr_type,
180 NULL
181 },
182 {
183 NGM_ETHER_COOKIE,
184 NGM_ETHER_DEL_MULTI,
185 "delmulti",
186 &ng_parse_enaddr_type,
187 NULL
188 },
189 {
190 NGM_ETHER_COOKIE,
191 NGM_ETHER_DETACH,
192 "detach",
193 NULL,
194 NULL
195 },
196 { 0 }
197};
198
199static struct ng_type ng_ether_typestruct = {
200 .version = NG_ABI_VERSION,
201 .name = NG_ETHER_NODE_TYPE,
202 .mod_event = ng_ether_mod_event,
203 .constructor = ng_ether_constructor,
204 .rcvmsg = ng_ether_rcvmsg,
205 .shutdown = ng_ether_shutdown,
206 .newhook = ng_ether_newhook,
207 .rcvdata = ng_ether_rcvdata,
208 .disconnect = ng_ether_disconnect,
209 .cmdlist = ng_ether_cmdlist,
210};
211NETGRAPH_INIT(ether, &ng_ether_typestruct);
212
213/******************************************************************
214 ETHERNET FUNCTION HOOKS
215******************************************************************/
216
217/*
218 * Handle a packet that has come in on an interface. We get to
219 * look at it here before any upper layer protocols do.
220 *
221 * NOTE: this function will get called at splimp()
222 */
223static void
224ng_ether_input(struct ifnet *ifp, struct mbuf **mp)
225{
226 const node_p node = IFP2NG(ifp);
227 const priv_p priv = NG_NODE_PRIVATE(node);
228 int error;
229
230 /* If "lower" hook not connected, let packet continue */
231 if (priv->lower == NULL)
232 return;
233 NG_SEND_DATA_ONLY(error, priv->lower, *mp); /* sets *mp = NULL */
234}
235
236/*
237 * Handle a packet that has come in on an interface, and which
238 * does not match any of our known protocols (an ``orphan'').
239 *
240 * NOTE: this function will get called at splimp()
241 */
242static void
243ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m)
244{
245 const node_p node = IFP2NG(ifp);
246 const priv_p priv = NG_NODE_PRIVATE(node);
247 int error;
248
249 /* If "orphan" hook not connected, discard packet */
250 if (priv->orphan == NULL) {
251 m_freem(m);
252 return;
253 }
254 NG_SEND_DATA_ONLY(error, priv->orphan, m);
255}
256
257/*
258 * Handle a packet that is going out on an interface.
259 * The Ethernet header is already attached to the mbuf.
260 */
261static int
262ng_ether_output(struct ifnet *ifp, struct mbuf **mp)
263{
264 const node_p node = IFP2NG(ifp);
265 const priv_p priv = NG_NODE_PRIVATE(node);
266 int error = 0;
267
268 /* If "upper" hook not connected, let packet continue */
269 if (priv->upper == NULL)
270 return (0);
271
272 /* Send it out "upper" hook */
273 NG_OUTBOUND_THREAD_REF();
274 NG_SEND_DATA_ONLY(error, priv->upper, *mp);
275 NG_OUTBOUND_THREAD_UNREF();
276 return (error);
277}
278
279/*
280 * A new Ethernet interface has been attached.
281 * Create a new node for it, etc.
282 */
283static void
284ng_ether_attach(struct ifnet *ifp)
285{
286 priv_p priv;
287 node_p node;
288
289 /*
290 * Do not create / attach an ether node to this ifnet if
291 * a netgraph node with the same name already exists.
292 * This should prevent ether nodes to become attached to
293 * eiface nodes, which may be problematic due to naming
294 * clashes.
295 */
296 if ((node = ng_name2noderef(NULL, ifp->if_xname)) != NULL) {
297 NG_NODE_UNREF(node);
298 return;
299 }
300
301 /* Create node */
302 KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__));
303 if (ng_make_node_common(&ng_ether_typestruct, &node) != 0) {
304 log(LOG_ERR, "%s: can't %s for %s\n",
305 __func__, "create node", ifp->if_xname);
306 return;
307 }
308
309 /* Allocate private data */
310 priv = malloc(sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
311 if (priv == NULL) {
312 log(LOG_ERR, "%s: can't %s for %s\n",
313 __func__, "allocate memory", ifp->if_xname);
314 NG_NODE_UNREF(node);
315 return;
316 }
317 NG_NODE_SET_PRIVATE(node, priv);
318 priv->ifp = ifp;
319 IFP2NG(ifp) = node;
320 priv->hwassist = ifp->if_hwassist;
321
322 /* Try to give the node the same name as the interface */
323 if (ng_name_node(node, ifp->if_xname) != 0) {
324 log(LOG_WARNING, "%s: can't name node %s\n",
325 __func__, ifp->if_xname);
326 }
327}
328
329/*
330 * An Ethernet interface is being detached.
331 * REALLY Destroy its node.
332 */
333static void
334ng_ether_detach(struct ifnet *ifp)
335{
336 const node_p node = IFP2NG(ifp);
337 const priv_p priv = NG_NODE_PRIVATE(node);
338
339 NG_NODE_REALLY_DIE(node); /* Force real removal of node */
340 /*
341 * We can't assume the ifnet is still around when we run shutdown
342 * So zap it now. XXX We HOPE that anything running at this time
343 * handles it (as it should in the non netgraph case).
344 */
345 IFP2NG(ifp) = NULL;
346 priv->ifp = NULL; /* XXX race if interrupted an output packet */
347 ng_rmnode_self(node); /* remove all netgraph parts */
348}
349
350/*
351 * Notify graph about link event.
352 * if_link_state_change() has already checked that the state has changed.
353 */
354static void
355ng_ether_link_state(struct ifnet *ifp, int state)
356{
357 const node_p node = IFP2NG(ifp);
358 const priv_p priv = NG_NODE_PRIVATE(node);
359 struct ng_mesg *msg;
360 int cmd, dummy_error = 0;
361
|
362 if (priv->lower == NULL)
363 return;
364
| |
365 if (state == LINK_STATE_UP)
366 cmd = NGM_LINK_IS_UP;
367 else if (state == LINK_STATE_DOWN)
368 cmd = NGM_LINK_IS_DOWN;
369 else
370 return;
371
| 362 if (state == LINK_STATE_UP)
363 cmd = NGM_LINK_IS_UP;
364 else if (state == LINK_STATE_DOWN)
365 cmd = NGM_LINK_IS_DOWN;
366 else
367 return;
368
|
372 NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT);
373 if (msg != NULL)
374 NG_SEND_MSG_HOOK(dummy_error, node, msg, priv->lower, 0);
| 369 if (priv->lower != NULL) {
370 NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT);
371 if (msg != NULL)
372 NG_SEND_MSG_HOOK(dummy_error, node, msg, priv->lower, 0);
373 }
374 if (priv->orphan != NULL) {
375 NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT);
376 if (msg != NULL)
377 NG_SEND_MSG_HOOK(dummy_error, node, msg, priv->orphan, 0);
378 }
|
375}
376
377/******************************************************************
378 NETGRAPH NODE METHODS
379******************************************************************/
380
381/*
382 * It is not possible or allowable to create a node of this type.
383 * Nodes get created when the interface is attached (or, when
384 * this node type's KLD is loaded).
385 */
386static int
387ng_ether_constructor(node_p node)
388{
389 return (EINVAL);
390}
391
392/*
393 * Check for attaching a new hook.
394 */
395static int
396ng_ether_newhook(node_p node, hook_p hook, const char *name)
397{
398 const priv_p priv = NG_NODE_PRIVATE(node);
399 hook_p *hookptr;
400
401 /* Divert hook is an alias for lower */
402 if (strcmp(name, NG_ETHER_HOOK_DIVERT) == 0)
403 name = NG_ETHER_HOOK_LOWER;
404
405 /* Which hook? */
406 if (strcmp(name, NG_ETHER_HOOK_UPPER) == 0) {
407 hookptr = &priv->upper;
408 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_upper);
409 NG_HOOK_SET_TO_INBOUND(hook);
410 } else if (strcmp(name, NG_ETHER_HOOK_LOWER) == 0) {
411 hookptr = &priv->lower;
412 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_lower);
413 } else if (strcmp(name, NG_ETHER_HOOK_ORPHAN) == 0) {
414 hookptr = &priv->orphan;
415 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_lower);
416 } else
417 return (EINVAL);
418
419 /* Check if already connected (shouldn't be, but doesn't hurt) */
420 if (*hookptr != NULL)
421 return (EISCONN);
422
423 /* Disable hardware checksums while 'upper' hook is connected */
424 if (hookptr == &priv->upper)
425 priv->ifp->if_hwassist = 0;
426 NG_HOOK_HI_STACK(hook);
427 /* OK */
428 *hookptr = hook;
429 return (0);
430}
431
432/*
433 * Receive an incoming control message.
434 */
435static int
436ng_ether_rcvmsg(node_p node, item_p item, hook_p lasthook)
437{
438 const priv_p priv = NG_NODE_PRIVATE(node);
439 struct ng_mesg *resp = NULL;
440 int error = 0;
441 struct ng_mesg *msg;
442
443 NGI_GET_MSG(item, msg);
444 switch (msg->header.typecookie) {
445 case NGM_ETHER_COOKIE:
446 switch (msg->header.cmd) {
447 case NGM_ETHER_GET_IFNAME:
448 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
449 if (resp == NULL) {
450 error = ENOMEM;
451 break;
452 }
453 strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ);
454 break;
455 case NGM_ETHER_GET_IFINDEX:
456 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
457 if (resp == NULL) {
458 error = ENOMEM;
459 break;
460 }
461 *((u_int32_t *)resp->data) = priv->ifp->if_index;
462 break;
463 case NGM_ETHER_GET_ENADDR:
464 NG_MKRESPONSE(resp, msg, ETHER_ADDR_LEN, M_NOWAIT);
465 if (resp == NULL) {
466 error = ENOMEM;
467 break;
468 }
469 bcopy(IF_LLADDR(priv->ifp),
470 resp->data, ETHER_ADDR_LEN);
471 break;
472 case NGM_ETHER_SET_ENADDR:
473 {
474 if (msg->header.arglen != ETHER_ADDR_LEN) {
475 error = EINVAL;
476 break;
477 }
478 error = if_setlladdr(priv->ifp,
479 (u_char *)msg->data, ETHER_ADDR_LEN);
480 break;
481 }
482 case NGM_ETHER_GET_PROMISC:
483 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
484 if (resp == NULL) {
485 error = ENOMEM;
486 break;
487 }
488 *((u_int32_t *)resp->data) = priv->promisc;
489 break;
490 case NGM_ETHER_SET_PROMISC:
491 {
492 u_char want;
493
494 if (msg->header.arglen != sizeof(u_int32_t)) {
495 error = EINVAL;
496 break;
497 }
498 want = !!*((u_int32_t *)msg->data);
499 if (want ^ priv->promisc) {
500 if ((error = ifpromisc(priv->ifp, want)) != 0)
501 break;
502 priv->promisc = want;
503 }
504 break;
505 }
506 case NGM_ETHER_GET_AUTOSRC:
507 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
508 if (resp == NULL) {
509 error = ENOMEM;
510 break;
511 }
512 *((u_int32_t *)resp->data) = priv->autoSrcAddr;
513 break;
514 case NGM_ETHER_SET_AUTOSRC:
515 if (msg->header.arglen != sizeof(u_int32_t)) {
516 error = EINVAL;
517 break;
518 }
519 priv->autoSrcAddr = !!*((u_int32_t *)msg->data);
520 break;
521 case NGM_ETHER_ADD_MULTI:
522 {
523 struct sockaddr_dl sa_dl;
524 struct ifmultiaddr *ifma;
525
526 if (msg->header.arglen != ETHER_ADDR_LEN) {
527 error = EINVAL;
528 break;
529 }
530 bzero(&sa_dl, sizeof(struct sockaddr_dl));
531 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
532 sa_dl.sdl_family = AF_LINK;
533 sa_dl.sdl_alen = ETHER_ADDR_LEN;
534 bcopy((void *)msg->data, LLADDR(&sa_dl),
535 ETHER_ADDR_LEN);
536 /*
537 * Netgraph is only permitted to join groups once
538 * via the if_addmulti() KPI, because it cannot hold
539 * struct ifmultiaddr * between calls. It may also
540 * lose a race while we check if the membership
541 * already exists.
542 */
543 if_maddr_rlock(priv->ifp);
544 ifma = if_findmulti(priv->ifp,
545 (struct sockaddr *)&sa_dl);
546 if_maddr_runlock(priv->ifp);
547 if (ifma != NULL) {
548 error = EADDRINUSE;
549 } else {
550 error = if_addmulti(priv->ifp,
551 (struct sockaddr *)&sa_dl, &ifma);
552 }
553 break;
554 }
555 case NGM_ETHER_DEL_MULTI:
556 {
557 struct sockaddr_dl sa_dl;
558
559 if (msg->header.arglen != ETHER_ADDR_LEN) {
560 error = EINVAL;
561 break;
562 }
563 bzero(&sa_dl, sizeof(struct sockaddr_dl));
564 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
565 sa_dl.sdl_family = AF_LINK;
566 sa_dl.sdl_alen = ETHER_ADDR_LEN;
567 bcopy((void *)msg->data, LLADDR(&sa_dl),
568 ETHER_ADDR_LEN);
569 error = if_delmulti(priv->ifp,
570 (struct sockaddr *)&sa_dl);
571 break;
572 }
573 case NGM_ETHER_DETACH:
574 ng_ether_detach(priv->ifp);
575 break;
576 default:
577 error = EINVAL;
578 break;
579 }
580 break;
581 default:
582 error = EINVAL;
583 break;
584 }
585 NG_RESPOND_MSG(error, node, item, resp);
586 NG_FREE_MSG(msg);
587 return (error);
588}
589
590/*
591 * Receive data on a hook.
592 * Since we use per-hook recveive methods this should never be called.
593 */
594static int
595ng_ether_rcvdata(hook_p hook, item_p item)
596{
597 NG_FREE_ITEM(item);
598
599 panic("%s: weird hook", __func__);
600#ifdef RESTARTABLE_PANICS /* so we don't get an error msg in LINT */
601 return (0);
602#endif
603}
604
605/*
606 * Handle an mbuf received on the "lower" or "orphan" hook.
607 */
608static int
609ng_ether_rcv_lower(hook_p hook, item_p item)
610{
611 struct mbuf *m;
612 const node_p node = NG_HOOK_NODE(hook);
613 const priv_p priv = NG_NODE_PRIVATE(node);
614 struct ifnet *const ifp = priv->ifp;
615
616 NGI_GET_M(item, m);
617 NG_FREE_ITEM(item);
618
619 /* Check whether interface is ready for packets */
620
621 if (!((ifp->if_flags & IFF_UP) &&
622 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
623 NG_FREE_M(m);
624 return (ENETDOWN);
625 }
626
627 /* Make sure header is fully pulled up */
628 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
629 NG_FREE_M(m);
630 return (EINVAL);
631 }
632 if (m->m_len < sizeof(struct ether_header)
633 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
634 return (ENOBUFS);
635
636 /* Drop in the MAC address if desired */
637 if (priv->autoSrcAddr) {
638
639 /* Make the mbuf writable if it's not already */
640 if (!M_WRITABLE(m)
641 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
642 return (ENOBUFS);
643
644 /* Overwrite source MAC address */
645 bcopy(IF_LLADDR(ifp),
646 mtod(m, struct ether_header *)->ether_shost,
647 ETHER_ADDR_LEN);
648 }
649
650 /* Send it on its way */
651 return ether_output_frame(ifp, m);
652}
653
654/*
655 * Handle an mbuf received on the "upper" hook.
656 */
657static int
658ng_ether_rcv_upper(hook_p hook, item_p item)
659{
660 struct mbuf *m;
661 const node_p node = NG_HOOK_NODE(hook);
662 const priv_p priv = NG_NODE_PRIVATE(node);
663 struct ifnet *ifp = priv->ifp;
664
665 NGI_GET_M(item, m);
666 NG_FREE_ITEM(item);
667
668 /* Check length and pull off header */
669 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
670 NG_FREE_M(m);
671 return (EINVAL);
672 }
673 if (m->m_len < sizeof(struct ether_header) &&
674 (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
675 return (ENOBUFS);
676
677 m->m_pkthdr.rcvif = ifp;
678
679 /* Pass the packet to the bridge, it may come back to us */
680 if (ifp->if_bridge) {
681 BRIDGE_INPUT(ifp, m);
682 if (m == NULL)
683 return (0);
684 }
685
686 /* Route packet back in */
687 ether_demux(ifp, m);
688 return (0);
689}
690
691/*
692 * Shutdown node. This resets the node but does not remove it
693 * unless the REALLY_DIE flag is set.
694 */
695static int
696ng_ether_shutdown(node_p node)
697{
698 const priv_p priv = NG_NODE_PRIVATE(node);
699
700 if (node->nd_flags & NGF_REALLY_DIE) {
701 /*
702 * WE came here because the ethernet card is being unloaded,
703 * so stop being persistant.
704 * Actually undo all the things we did on creation.
705 * Assume the ifp has already been freed.
706 */
707 NG_NODE_SET_PRIVATE(node, NULL);
708 free(priv, M_NETGRAPH);
709 NG_NODE_UNREF(node); /* free node itself */
710 return (0);
711 }
712 if (priv->promisc) { /* disable promiscuous mode */
713 (void)ifpromisc(priv->ifp, 0);
714 priv->promisc = 0;
715 }
716 priv->autoSrcAddr = 1; /* reset auto-src-addr flag */
717 NG_NODE_REVIVE(node); /* Signal ng_rmnode we are persisant */
718
719 return (0);
720}
721
722/*
723 * Hook disconnection.
724 */
725static int
726ng_ether_disconnect(hook_p hook)
727{
728 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
729
730 if (hook == priv->upper) {
731 priv->upper = NULL;
732 if (priv->ifp != NULL) /* restore h/w csum */
733 priv->ifp->if_hwassist = priv->hwassist;
734 } else if (hook == priv->lower)
735 priv->lower = NULL;
736 else if (hook == priv->orphan)
737 priv->orphan = NULL;
738 else
739 panic("%s: weird hook", __func__);
740 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
741 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
742 ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */
743 return (0);
744}
745
746/******************************************************************
747 INITIALIZATION
748******************************************************************/
749
750/*
751 * Handle loading and unloading for this node type.
752 */
753static int
754ng_ether_mod_event(module_t mod, int event, void *data)
755{
756 int error = 0;
757 int s;
758
759 s = splnet();
760 switch (event) {
761 case MOD_LOAD:
762
763 /* Register function hooks */
764 if (ng_ether_attach_p != NULL) {
765 error = EEXIST;
766 break;
767 }
768 ng_ether_attach_p = ng_ether_attach;
769 ng_ether_detach_p = ng_ether_detach;
770 ng_ether_output_p = ng_ether_output;
771 ng_ether_input_p = ng_ether_input;
772 ng_ether_input_orphan_p = ng_ether_input_orphan;
773 ng_ether_link_state_p = ng_ether_link_state;
774
775 break;
776
777 case MOD_UNLOAD:
778
779 /*
780 * Note that the base code won't try to unload us until
781 * all nodes have been removed, and that can't happen
782 * until all Ethernet interfaces are removed. In any
783 * case, we know there are no nodes left if the action
784 * is MOD_UNLOAD, so there's no need to detach any nodes.
785 */
786
787 /* Unregister function hooks */
788 ng_ether_attach_p = NULL;
789 ng_ether_detach_p = NULL;
790 ng_ether_output_p = NULL;
791 ng_ether_input_p = NULL;
792 ng_ether_input_orphan_p = NULL;
793 ng_ether_link_state_p = NULL;
794 break;
795
796 default:
797 error = EOPNOTSUPP;
798 break;
799 }
800 splx(s);
801 return (error);
802}
803
804static void
805vnet_ng_ether_init(const void *unused)
806{
807 struct ifnet *ifp;
808
809 /* If module load was rejected, don't attach to vnets. */
810 if (ng_ether_attach_p != ng_ether_attach)
811 return;
812
813 /* Create nodes for any already-existing Ethernet interfaces. */
814 IFNET_RLOCK();
815 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
816 if (ifp->if_type == IFT_ETHER
817 || ifp->if_type == IFT_L2VLAN)
818 ng_ether_attach(ifp);
819 }
820 IFNET_RUNLOCK();
821}
822VNET_SYSINIT(vnet_ng_ether_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
823 vnet_ng_ether_init, NULL);
| 379}
380
381/******************************************************************
382 NETGRAPH NODE METHODS
383******************************************************************/
384
385/*
386 * It is not possible or allowable to create a node of this type.
387 * Nodes get created when the interface is attached (or, when
388 * this node type's KLD is loaded).
389 */
390static int
391ng_ether_constructor(node_p node)
392{
393 return (EINVAL);
394}
395
396/*
397 * Check for attaching a new hook.
398 */
399static int
400ng_ether_newhook(node_p node, hook_p hook, const char *name)
401{
402 const priv_p priv = NG_NODE_PRIVATE(node);
403 hook_p *hookptr;
404
405 /* Divert hook is an alias for lower */
406 if (strcmp(name, NG_ETHER_HOOK_DIVERT) == 0)
407 name = NG_ETHER_HOOK_LOWER;
408
409 /* Which hook? */
410 if (strcmp(name, NG_ETHER_HOOK_UPPER) == 0) {
411 hookptr = &priv->upper;
412 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_upper);
413 NG_HOOK_SET_TO_INBOUND(hook);
414 } else if (strcmp(name, NG_ETHER_HOOK_LOWER) == 0) {
415 hookptr = &priv->lower;
416 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_lower);
417 } else if (strcmp(name, NG_ETHER_HOOK_ORPHAN) == 0) {
418 hookptr = &priv->orphan;
419 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_lower);
420 } else
421 return (EINVAL);
422
423 /* Check if already connected (shouldn't be, but doesn't hurt) */
424 if (*hookptr != NULL)
425 return (EISCONN);
426
427 /* Disable hardware checksums while 'upper' hook is connected */
428 if (hookptr == &priv->upper)
429 priv->ifp->if_hwassist = 0;
430 NG_HOOK_HI_STACK(hook);
431 /* OK */
432 *hookptr = hook;
433 return (0);
434}
435
436/*
437 * Receive an incoming control message.
438 */
439static int
440ng_ether_rcvmsg(node_p node, item_p item, hook_p lasthook)
441{
442 const priv_p priv = NG_NODE_PRIVATE(node);
443 struct ng_mesg *resp = NULL;
444 int error = 0;
445 struct ng_mesg *msg;
446
447 NGI_GET_MSG(item, msg);
448 switch (msg->header.typecookie) {
449 case NGM_ETHER_COOKIE:
450 switch (msg->header.cmd) {
451 case NGM_ETHER_GET_IFNAME:
452 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
453 if (resp == NULL) {
454 error = ENOMEM;
455 break;
456 }
457 strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ);
458 break;
459 case NGM_ETHER_GET_IFINDEX:
460 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
461 if (resp == NULL) {
462 error = ENOMEM;
463 break;
464 }
465 *((u_int32_t *)resp->data) = priv->ifp->if_index;
466 break;
467 case NGM_ETHER_GET_ENADDR:
468 NG_MKRESPONSE(resp, msg, ETHER_ADDR_LEN, M_NOWAIT);
469 if (resp == NULL) {
470 error = ENOMEM;
471 break;
472 }
473 bcopy(IF_LLADDR(priv->ifp),
474 resp->data, ETHER_ADDR_LEN);
475 break;
476 case NGM_ETHER_SET_ENADDR:
477 {
478 if (msg->header.arglen != ETHER_ADDR_LEN) {
479 error = EINVAL;
480 break;
481 }
482 error = if_setlladdr(priv->ifp,
483 (u_char *)msg->data, ETHER_ADDR_LEN);
484 break;
485 }
486 case NGM_ETHER_GET_PROMISC:
487 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
488 if (resp == NULL) {
489 error = ENOMEM;
490 break;
491 }
492 *((u_int32_t *)resp->data) = priv->promisc;
493 break;
494 case NGM_ETHER_SET_PROMISC:
495 {
496 u_char want;
497
498 if (msg->header.arglen != sizeof(u_int32_t)) {
499 error = EINVAL;
500 break;
501 }
502 want = !!*((u_int32_t *)msg->data);
503 if (want ^ priv->promisc) {
504 if ((error = ifpromisc(priv->ifp, want)) != 0)
505 break;
506 priv->promisc = want;
507 }
508 break;
509 }
510 case NGM_ETHER_GET_AUTOSRC:
511 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
512 if (resp == NULL) {
513 error = ENOMEM;
514 break;
515 }
516 *((u_int32_t *)resp->data) = priv->autoSrcAddr;
517 break;
518 case NGM_ETHER_SET_AUTOSRC:
519 if (msg->header.arglen != sizeof(u_int32_t)) {
520 error = EINVAL;
521 break;
522 }
523 priv->autoSrcAddr = !!*((u_int32_t *)msg->data);
524 break;
525 case NGM_ETHER_ADD_MULTI:
526 {
527 struct sockaddr_dl sa_dl;
528 struct ifmultiaddr *ifma;
529
530 if (msg->header.arglen != ETHER_ADDR_LEN) {
531 error = EINVAL;
532 break;
533 }
534 bzero(&sa_dl, sizeof(struct sockaddr_dl));
535 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
536 sa_dl.sdl_family = AF_LINK;
537 sa_dl.sdl_alen = ETHER_ADDR_LEN;
538 bcopy((void *)msg->data, LLADDR(&sa_dl),
539 ETHER_ADDR_LEN);
540 /*
541 * Netgraph is only permitted to join groups once
542 * via the if_addmulti() KPI, because it cannot hold
543 * struct ifmultiaddr * between calls. It may also
544 * lose a race while we check if the membership
545 * already exists.
546 */
547 if_maddr_rlock(priv->ifp);
548 ifma = if_findmulti(priv->ifp,
549 (struct sockaddr *)&sa_dl);
550 if_maddr_runlock(priv->ifp);
551 if (ifma != NULL) {
552 error = EADDRINUSE;
553 } else {
554 error = if_addmulti(priv->ifp,
555 (struct sockaddr *)&sa_dl, &ifma);
556 }
557 break;
558 }
559 case NGM_ETHER_DEL_MULTI:
560 {
561 struct sockaddr_dl sa_dl;
562
563 if (msg->header.arglen != ETHER_ADDR_LEN) {
564 error = EINVAL;
565 break;
566 }
567 bzero(&sa_dl, sizeof(struct sockaddr_dl));
568 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
569 sa_dl.sdl_family = AF_LINK;
570 sa_dl.sdl_alen = ETHER_ADDR_LEN;
571 bcopy((void *)msg->data, LLADDR(&sa_dl),
572 ETHER_ADDR_LEN);
573 error = if_delmulti(priv->ifp,
574 (struct sockaddr *)&sa_dl);
575 break;
576 }
577 case NGM_ETHER_DETACH:
578 ng_ether_detach(priv->ifp);
579 break;
580 default:
581 error = EINVAL;
582 break;
583 }
584 break;
585 default:
586 error = EINVAL;
587 break;
588 }
589 NG_RESPOND_MSG(error, node, item, resp);
590 NG_FREE_MSG(msg);
591 return (error);
592}
593
594/*
595 * Receive data on a hook.
596 * Since we use per-hook recveive methods this should never be called.
597 */
598static int
599ng_ether_rcvdata(hook_p hook, item_p item)
600{
601 NG_FREE_ITEM(item);
602
603 panic("%s: weird hook", __func__);
604#ifdef RESTARTABLE_PANICS /* so we don't get an error msg in LINT */
605 return (0);
606#endif
607}
608
609/*
610 * Handle an mbuf received on the "lower" or "orphan" hook.
611 */
612static int
613ng_ether_rcv_lower(hook_p hook, item_p item)
614{
615 struct mbuf *m;
616 const node_p node = NG_HOOK_NODE(hook);
617 const priv_p priv = NG_NODE_PRIVATE(node);
618 struct ifnet *const ifp = priv->ifp;
619
620 NGI_GET_M(item, m);
621 NG_FREE_ITEM(item);
622
623 /* Check whether interface is ready for packets */
624
625 if (!((ifp->if_flags & IFF_UP) &&
626 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
627 NG_FREE_M(m);
628 return (ENETDOWN);
629 }
630
631 /* Make sure header is fully pulled up */
632 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
633 NG_FREE_M(m);
634 return (EINVAL);
635 }
636 if (m->m_len < sizeof(struct ether_header)
637 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
638 return (ENOBUFS);
639
640 /* Drop in the MAC address if desired */
641 if (priv->autoSrcAddr) {
642
643 /* Make the mbuf writable if it's not already */
644 if (!M_WRITABLE(m)
645 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
646 return (ENOBUFS);
647
648 /* Overwrite source MAC address */
649 bcopy(IF_LLADDR(ifp),
650 mtod(m, struct ether_header *)->ether_shost,
651 ETHER_ADDR_LEN);
652 }
653
654 /* Send it on its way */
655 return ether_output_frame(ifp, m);
656}
657
658/*
659 * Handle an mbuf received on the "upper" hook.
660 */
661static int
662ng_ether_rcv_upper(hook_p hook, item_p item)
663{
664 struct mbuf *m;
665 const node_p node = NG_HOOK_NODE(hook);
666 const priv_p priv = NG_NODE_PRIVATE(node);
667 struct ifnet *ifp = priv->ifp;
668
669 NGI_GET_M(item, m);
670 NG_FREE_ITEM(item);
671
672 /* Check length and pull off header */
673 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
674 NG_FREE_M(m);
675 return (EINVAL);
676 }
677 if (m->m_len < sizeof(struct ether_header) &&
678 (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
679 return (ENOBUFS);
680
681 m->m_pkthdr.rcvif = ifp;
682
683 /* Pass the packet to the bridge, it may come back to us */
684 if (ifp->if_bridge) {
685 BRIDGE_INPUT(ifp, m);
686 if (m == NULL)
687 return (0);
688 }
689
690 /* Route packet back in */
691 ether_demux(ifp, m);
692 return (0);
693}
694
695/*
696 * Shutdown node. This resets the node but does not remove it
697 * unless the REALLY_DIE flag is set.
698 */
699static int
700ng_ether_shutdown(node_p node)
701{
702 const priv_p priv = NG_NODE_PRIVATE(node);
703
704 if (node->nd_flags & NGF_REALLY_DIE) {
705 /*
706 * WE came here because the ethernet card is being unloaded,
707 * so stop being persistant.
708 * Actually undo all the things we did on creation.
709 * Assume the ifp has already been freed.
710 */
711 NG_NODE_SET_PRIVATE(node, NULL);
712 free(priv, M_NETGRAPH);
713 NG_NODE_UNREF(node); /* free node itself */
714 return (0);
715 }
716 if (priv->promisc) { /* disable promiscuous mode */
717 (void)ifpromisc(priv->ifp, 0);
718 priv->promisc = 0;
719 }
720 priv->autoSrcAddr = 1; /* reset auto-src-addr flag */
721 NG_NODE_REVIVE(node); /* Signal ng_rmnode we are persisant */
722
723 return (0);
724}
725
726/*
727 * Hook disconnection.
728 */
729static int
730ng_ether_disconnect(hook_p hook)
731{
732 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
733
734 if (hook == priv->upper) {
735 priv->upper = NULL;
736 if (priv->ifp != NULL) /* restore h/w csum */
737 priv->ifp->if_hwassist = priv->hwassist;
738 } else if (hook == priv->lower)
739 priv->lower = NULL;
740 else if (hook == priv->orphan)
741 priv->orphan = NULL;
742 else
743 panic("%s: weird hook", __func__);
744 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
745 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
746 ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */
747 return (0);
748}
749
750/******************************************************************
751 INITIALIZATION
752******************************************************************/
753
754/*
755 * Handle loading and unloading for this node type.
756 */
757static int
758ng_ether_mod_event(module_t mod, int event, void *data)
759{
760 int error = 0;
761 int s;
762
763 s = splnet();
764 switch (event) {
765 case MOD_LOAD:
766
767 /* Register function hooks */
768 if (ng_ether_attach_p != NULL) {
769 error = EEXIST;
770 break;
771 }
772 ng_ether_attach_p = ng_ether_attach;
773 ng_ether_detach_p = ng_ether_detach;
774 ng_ether_output_p = ng_ether_output;
775 ng_ether_input_p = ng_ether_input;
776 ng_ether_input_orphan_p = ng_ether_input_orphan;
777 ng_ether_link_state_p = ng_ether_link_state;
778
779 break;
780
781 case MOD_UNLOAD:
782
783 /*
784 * Note that the base code won't try to unload us until
785 * all nodes have been removed, and that can't happen
786 * until all Ethernet interfaces are removed. In any
787 * case, we know there are no nodes left if the action
788 * is MOD_UNLOAD, so there's no need to detach any nodes.
789 */
790
791 /* Unregister function hooks */
792 ng_ether_attach_p = NULL;
793 ng_ether_detach_p = NULL;
794 ng_ether_output_p = NULL;
795 ng_ether_input_p = NULL;
796 ng_ether_input_orphan_p = NULL;
797 ng_ether_link_state_p = NULL;
798 break;
799
800 default:
801 error = EOPNOTSUPP;
802 break;
803 }
804 splx(s);
805 return (error);
806}
807
808static void
809vnet_ng_ether_init(const void *unused)
810{
811 struct ifnet *ifp;
812
813 /* If module load was rejected, don't attach to vnets. */
814 if (ng_ether_attach_p != ng_ether_attach)
815 return;
816
817 /* Create nodes for any already-existing Ethernet interfaces. */
818 IFNET_RLOCK();
819 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
820 if (ifp->if_type == IFT_ETHER
821 || ifp->if_type == IFT_L2VLAN)
822 ng_ether_attach(ifp);
823 }
824 IFNET_RUNLOCK();
825}
826VNET_SYSINIT(vnet_ng_ether_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
827 vnet_ng_ether_init, NULL);
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