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 238844 2012-07-27 13:57:28Z emaste $
| 42 * $FreeBSD: head/sys/netgraph/ng_ether.c 241686 2012-10-18 13:57:24Z andre $
|
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#include <sys/taskqueue.h>
59
60#include <net/if.h>
61#include <net/if_dl.h>
62#include <net/if_types.h>
63#include <net/if_arp.h>
64#include <net/if_var.h>
65#include <net/ethernet.h>
66#include <net/if_bridgevar.h>
67#include <net/vnet.h>
68
69#include <netgraph/ng_message.h>
70#include <netgraph/netgraph.h>
71#include <netgraph/ng_parse.h>
72#include <netgraph/ng_ether.h>
73
74MODULE_VERSION(ng_ether, 1);
75
76#define IFP2NG(ifp) (IFP2AC((ifp))->ac_netgraph)
77
78/* Per-node private data */
79struct private {
80 struct ifnet *ifp; /* associated interface */
81 hook_p upper; /* upper hook connection */
82 hook_p lower; /* lower hook connection */
83 hook_p orphan; /* orphan hook connection */
84 u_char autoSrcAddr; /* always overwrite source address */
85 u_char promisc; /* promiscuous mode enabled */
86 u_long hwassist; /* hardware checksum capabilities */
87 u_int flags; /* flags e.g. really die */
88};
89typedef struct private *priv_p;
90
91/* Hook pointers used by if_ethersubr.c to callback to netgraph */
92extern void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
93extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
94extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
95extern void (*ng_ether_attach_p)(struct ifnet *ifp);
96extern void (*ng_ether_detach_p)(struct ifnet *ifp);
97extern void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
98
99/* Functional hooks called from if_ethersubr.c */
100static void ng_ether_input(struct ifnet *ifp, struct mbuf **mp);
101static void ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m);
102static int ng_ether_output(struct ifnet *ifp, struct mbuf **mp);
103static void ng_ether_attach(struct ifnet *ifp);
104static void ng_ether_detach(struct ifnet *ifp);
105static void ng_ether_link_state(struct ifnet *ifp, int state);
106
107/* Other functions */
108static int ng_ether_rcv_lower(hook_p node, item_p item);
109static int ng_ether_rcv_upper(hook_p node, item_p item);
110
111/* Netgraph node methods */
112static ng_constructor_t ng_ether_constructor;
113static ng_rcvmsg_t ng_ether_rcvmsg;
114static ng_shutdown_t ng_ether_shutdown;
115static ng_newhook_t ng_ether_newhook;
116static ng_rcvdata_t ng_ether_rcvdata;
117static ng_disconnect_t ng_ether_disconnect;
118static int ng_ether_mod_event(module_t mod, int event, void *data);
119
120/* List of commands and how to convert arguments to/from ASCII */
121static const struct ng_cmdlist ng_ether_cmdlist[] = {
122 {
123 NGM_ETHER_COOKIE,
124 NGM_ETHER_GET_IFNAME,
125 "getifname",
126 NULL,
127 &ng_parse_string_type
128 },
129 {
130 NGM_ETHER_COOKIE,
131 NGM_ETHER_GET_IFINDEX,
132 "getifindex",
133 NULL,
134 &ng_parse_int32_type
135 },
136 {
137 NGM_ETHER_COOKIE,
138 NGM_ETHER_GET_ENADDR,
139 "getenaddr",
140 NULL,
141 &ng_parse_enaddr_type
142 },
143 {
144 NGM_ETHER_COOKIE,
145 NGM_ETHER_SET_ENADDR,
146 "setenaddr",
147 &ng_parse_enaddr_type,
148 NULL
149 },
150 {
151 NGM_ETHER_COOKIE,
152 NGM_ETHER_GET_PROMISC,
153 "getpromisc",
154 NULL,
155 &ng_parse_int32_type
156 },
157 {
158 NGM_ETHER_COOKIE,
159 NGM_ETHER_SET_PROMISC,
160 "setpromisc",
161 &ng_parse_int32_type,
162 NULL
163 },
164 {
165 NGM_ETHER_COOKIE,
166 NGM_ETHER_GET_AUTOSRC,
167 "getautosrc",
168 NULL,
169 &ng_parse_int32_type
170 },
171 {
172 NGM_ETHER_COOKIE,
173 NGM_ETHER_SET_AUTOSRC,
174 "setautosrc",
175 &ng_parse_int32_type,
176 NULL
177 },
178 {
179 NGM_ETHER_COOKIE,
180 NGM_ETHER_ADD_MULTI,
181 "addmulti",
182 &ng_parse_enaddr_type,
183 NULL
184 },
185 {
186 NGM_ETHER_COOKIE,
187 NGM_ETHER_DEL_MULTI,
188 "delmulti",
189 &ng_parse_enaddr_type,
190 NULL
191 },
192 {
193 NGM_ETHER_COOKIE,
194 NGM_ETHER_DETACH,
195 "detach",
196 NULL,
197 NULL
198 },
199 { 0 }
200};
201
202static struct ng_type ng_ether_typestruct = {
203 .version = NG_ABI_VERSION,
204 .name = NG_ETHER_NODE_TYPE,
205 .mod_event = ng_ether_mod_event,
206 .constructor = ng_ether_constructor,
207 .rcvmsg = ng_ether_rcvmsg,
208 .shutdown = ng_ether_shutdown,
209 .newhook = ng_ether_newhook,
210 .rcvdata = ng_ether_rcvdata,
211 .disconnect = ng_ether_disconnect,
212 .cmdlist = ng_ether_cmdlist,
213};
214NETGRAPH_INIT(ether, &ng_ether_typestruct);
215
216/******************************************************************
217 ETHERNET FUNCTION HOOKS
218******************************************************************/
219
220/*
221 * Handle a packet that has come in on an interface. We get to
222 * look at it here before any upper layer protocols do.
| 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#include <sys/taskqueue.h>
59
60#include <net/if.h>
61#include <net/if_dl.h>
62#include <net/if_types.h>
63#include <net/if_arp.h>
64#include <net/if_var.h>
65#include <net/ethernet.h>
66#include <net/if_bridgevar.h>
67#include <net/vnet.h>
68
69#include <netgraph/ng_message.h>
70#include <netgraph/netgraph.h>
71#include <netgraph/ng_parse.h>
72#include <netgraph/ng_ether.h>
73
74MODULE_VERSION(ng_ether, 1);
75
76#define IFP2NG(ifp) (IFP2AC((ifp))->ac_netgraph)
77
78/* Per-node private data */
79struct private {
80 struct ifnet *ifp; /* associated interface */
81 hook_p upper; /* upper hook connection */
82 hook_p lower; /* lower hook connection */
83 hook_p orphan; /* orphan hook connection */
84 u_char autoSrcAddr; /* always overwrite source address */
85 u_char promisc; /* promiscuous mode enabled */
86 u_long hwassist; /* hardware checksum capabilities */
87 u_int flags; /* flags e.g. really die */
88};
89typedef struct private *priv_p;
90
91/* Hook pointers used by if_ethersubr.c to callback to netgraph */
92extern void (*ng_ether_input_p)(struct ifnet *ifp, struct mbuf **mp);
93extern void (*ng_ether_input_orphan_p)(struct ifnet *ifp, struct mbuf *m);
94extern int (*ng_ether_output_p)(struct ifnet *ifp, struct mbuf **mp);
95extern void (*ng_ether_attach_p)(struct ifnet *ifp);
96extern void (*ng_ether_detach_p)(struct ifnet *ifp);
97extern void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
98
99/* Functional hooks called from if_ethersubr.c */
100static void ng_ether_input(struct ifnet *ifp, struct mbuf **mp);
101static void ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m);
102static int ng_ether_output(struct ifnet *ifp, struct mbuf **mp);
103static void ng_ether_attach(struct ifnet *ifp);
104static void ng_ether_detach(struct ifnet *ifp);
105static void ng_ether_link_state(struct ifnet *ifp, int state);
106
107/* Other functions */
108static int ng_ether_rcv_lower(hook_p node, item_p item);
109static int ng_ether_rcv_upper(hook_p node, item_p item);
110
111/* Netgraph node methods */
112static ng_constructor_t ng_ether_constructor;
113static ng_rcvmsg_t ng_ether_rcvmsg;
114static ng_shutdown_t ng_ether_shutdown;
115static ng_newhook_t ng_ether_newhook;
116static ng_rcvdata_t ng_ether_rcvdata;
117static ng_disconnect_t ng_ether_disconnect;
118static int ng_ether_mod_event(module_t mod, int event, void *data);
119
120/* List of commands and how to convert arguments to/from ASCII */
121static const struct ng_cmdlist ng_ether_cmdlist[] = {
122 {
123 NGM_ETHER_COOKIE,
124 NGM_ETHER_GET_IFNAME,
125 "getifname",
126 NULL,
127 &ng_parse_string_type
128 },
129 {
130 NGM_ETHER_COOKIE,
131 NGM_ETHER_GET_IFINDEX,
132 "getifindex",
133 NULL,
134 &ng_parse_int32_type
135 },
136 {
137 NGM_ETHER_COOKIE,
138 NGM_ETHER_GET_ENADDR,
139 "getenaddr",
140 NULL,
141 &ng_parse_enaddr_type
142 },
143 {
144 NGM_ETHER_COOKIE,
145 NGM_ETHER_SET_ENADDR,
146 "setenaddr",
147 &ng_parse_enaddr_type,
148 NULL
149 },
150 {
151 NGM_ETHER_COOKIE,
152 NGM_ETHER_GET_PROMISC,
153 "getpromisc",
154 NULL,
155 &ng_parse_int32_type
156 },
157 {
158 NGM_ETHER_COOKIE,
159 NGM_ETHER_SET_PROMISC,
160 "setpromisc",
161 &ng_parse_int32_type,
162 NULL
163 },
164 {
165 NGM_ETHER_COOKIE,
166 NGM_ETHER_GET_AUTOSRC,
167 "getautosrc",
168 NULL,
169 &ng_parse_int32_type
170 },
171 {
172 NGM_ETHER_COOKIE,
173 NGM_ETHER_SET_AUTOSRC,
174 "setautosrc",
175 &ng_parse_int32_type,
176 NULL
177 },
178 {
179 NGM_ETHER_COOKIE,
180 NGM_ETHER_ADD_MULTI,
181 "addmulti",
182 &ng_parse_enaddr_type,
183 NULL
184 },
185 {
186 NGM_ETHER_COOKIE,
187 NGM_ETHER_DEL_MULTI,
188 "delmulti",
189 &ng_parse_enaddr_type,
190 NULL
191 },
192 {
193 NGM_ETHER_COOKIE,
194 NGM_ETHER_DETACH,
195 "detach",
196 NULL,
197 NULL
198 },
199 { 0 }
200};
201
202static struct ng_type ng_ether_typestruct = {
203 .version = NG_ABI_VERSION,
204 .name = NG_ETHER_NODE_TYPE,
205 .mod_event = ng_ether_mod_event,
206 .constructor = ng_ether_constructor,
207 .rcvmsg = ng_ether_rcvmsg,
208 .shutdown = ng_ether_shutdown,
209 .newhook = ng_ether_newhook,
210 .rcvdata = ng_ether_rcvdata,
211 .disconnect = ng_ether_disconnect,
212 .cmdlist = ng_ether_cmdlist,
213};
214NETGRAPH_INIT(ether, &ng_ether_typestruct);
215
216/******************************************************************
217 ETHERNET FUNCTION HOOKS
218******************************************************************/
219
220/*
221 * Handle a packet that has come in on an interface. We get to
222 * look at it here before any upper layer protocols do.
|
223 *
224 * NOTE: this function will get called at splimp()
| |
225 */
226static void
227ng_ether_input(struct ifnet *ifp, struct mbuf **mp)
228{
229 const node_p node = IFP2NG(ifp);
230 const priv_p priv = NG_NODE_PRIVATE(node);
231 int error;
232
233 /* If "lower" hook not connected, let packet continue */
234 if (priv->lower == NULL)
235 return;
236 NG_SEND_DATA_ONLY(error, priv->lower, *mp); /* sets *mp = NULL */
237}
238
239/*
240 * Handle a packet that has come in on an interface, and which
241 * does not match any of our known protocols (an ``orphan'').
| 223 */
224static void
225ng_ether_input(struct ifnet *ifp, struct mbuf **mp)
226{
227 const node_p node = IFP2NG(ifp);
228 const priv_p priv = NG_NODE_PRIVATE(node);
229 int error;
230
231 /* If "lower" hook not connected, let packet continue */
232 if (priv->lower == NULL)
233 return;
234 NG_SEND_DATA_ONLY(error, priv->lower, *mp); /* sets *mp = NULL */
235}
236
237/*
238 * Handle a packet that has come in on an interface, and which
239 * does not match any of our known protocols (an ``orphan'').
|
242 *
243 * NOTE: this function will get called at splimp()
| |
244 */
245static void
246ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m)
247{
248 const node_p node = IFP2NG(ifp);
249 const priv_p priv = NG_NODE_PRIVATE(node);
250 int error;
251
252 /* If "orphan" hook not connected, discard packet */
253 if (priv->orphan == NULL) {
254 m_freem(m);
255 return;
256 }
257 NG_SEND_DATA_ONLY(error, priv->orphan, m);
258}
259
260/*
261 * Handle a packet that is going out on an interface.
262 * The Ethernet header is already attached to the mbuf.
263 */
264static int
265ng_ether_output(struct ifnet *ifp, struct mbuf **mp)
266{
267 const node_p node = IFP2NG(ifp);
268 const priv_p priv = NG_NODE_PRIVATE(node);
269 int error = 0;
270
271 /* If "upper" hook not connected, let packet continue */
272 if (priv->upper == NULL)
273 return (0);
274
275 /* Send it out "upper" hook */
276 NG_OUTBOUND_THREAD_REF();
277 NG_SEND_DATA_ONLY(error, priv->upper, *mp);
278 NG_OUTBOUND_THREAD_UNREF();
279 return (error);
280}
281
282/*
283 * A new Ethernet interface has been attached.
284 * Create a new node for it, etc.
285 */
286static void
287ng_ether_attach(struct ifnet *ifp)
288{
289 priv_p priv;
290 node_p node;
291
292 /*
293 * Do not create / attach an ether node to this ifnet if
294 * a netgraph node with the same name already exists.
295 * This should prevent ether nodes to become attached to
296 * eiface nodes, which may be problematic due to naming
297 * clashes.
298 */
299 if ((node = ng_name2noderef(NULL, ifp->if_xname)) != NULL) {
300 NG_NODE_UNREF(node);
301 return;
302 }
303
304 /* Create node */
305 KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__));
306 if (ng_make_node_common(&ng_ether_typestruct, &node) != 0) {
307 log(LOG_ERR, "%s: can't %s for %s\n",
308 __func__, "create node", ifp->if_xname);
309 return;
310 }
311
312 /* Allocate private data */
313 priv = malloc(sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
314 if (priv == NULL) {
315 log(LOG_ERR, "%s: can't %s for %s\n",
316 __func__, "allocate memory", ifp->if_xname);
317 NG_NODE_UNREF(node);
318 return;
319 }
320 NG_NODE_SET_PRIVATE(node, priv);
321 priv->ifp = ifp;
322 IFP2NG(ifp) = node;
323 priv->hwassist = ifp->if_hwassist;
324
325 /* Try to give the node the same name as the interface */
326 if (ng_name_node(node, ifp->if_xname) != 0) {
327 log(LOG_WARNING, "%s: can't name node %s\n",
328 __func__, ifp->if_xname);
329 }
330}
331
332/*
333 * An Ethernet interface is being detached.
334 * REALLY Destroy its node.
335 */
336static void
337ng_ether_detach(struct ifnet *ifp)
338{
339 const node_p node = IFP2NG(ifp);
340 const priv_p priv = NG_NODE_PRIVATE(node);
341
342 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
343 NG_NODE_REALLY_DIE(node); /* Force real removal of node */
344 /*
345 * We can't assume the ifnet is still around when we run shutdown
346 * So zap it now. XXX We HOPE that anything running at this time
347 * handles it (as it should in the non netgraph case).
348 */
349 IFP2NG(ifp) = NULL;
350 priv->ifp = NULL; /* XXX race if interrupted an output packet */
351 ng_rmnode_self(node); /* remove all netgraph parts */
352}
353
354/*
355 * Notify graph about link event.
356 * if_link_state_change() has already checked that the state has changed.
357 */
358static void
359ng_ether_link_state(struct ifnet *ifp, int state)
360{
361 const node_p node = IFP2NG(ifp);
362 const priv_p priv = NG_NODE_PRIVATE(node);
363 struct ng_mesg *msg;
364 int cmd, dummy_error = 0;
365
366 if (state == LINK_STATE_UP)
367 cmd = NGM_LINK_IS_UP;
368 else if (state == LINK_STATE_DOWN)
369 cmd = NGM_LINK_IS_DOWN;
370 else
371 return;
372
373 if (priv->lower != NULL) {
374 NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT);
375 if (msg != NULL)
376 NG_SEND_MSG_HOOK(dummy_error, node, msg, priv->lower, 0);
377 }
378 if (priv->orphan != NULL) {
379 NG_MKMESSAGE(msg, NGM_FLOW_COOKIE, cmd, 0, M_NOWAIT);
380 if (msg != NULL)
381 NG_SEND_MSG_HOOK(dummy_error, node, msg, priv->orphan, 0);
382 }
383}
384
385/******************************************************************
386 NETGRAPH NODE METHODS
387******************************************************************/
388
389/*
390 * It is not possible or allowable to create a node of this type.
391 * Nodes get created when the interface is attached (or, when
392 * this node type's KLD is loaded).
393 */
394static int
395ng_ether_constructor(node_p node)
396{
397 return (EINVAL);
398}
399
400/*
401 * Check for attaching a new hook.
402 */
403static int
404ng_ether_newhook(node_p node, hook_p hook, const char *name)
405{
406 const priv_p priv = NG_NODE_PRIVATE(node);
407 hook_p *hookptr;
408
409 /* Divert hook is an alias for lower */
410 if (strcmp(name, NG_ETHER_HOOK_DIVERT) == 0)
411 name = NG_ETHER_HOOK_LOWER;
412
413 /* Which hook? */
414 if (strcmp(name, NG_ETHER_HOOK_UPPER) == 0) {
415 hookptr = &priv->upper;
416 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_upper);
417 NG_HOOK_SET_TO_INBOUND(hook);
418 } else if (strcmp(name, NG_ETHER_HOOK_LOWER) == 0) {
419 hookptr = &priv->lower;
420 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_lower);
421 } else if (strcmp(name, NG_ETHER_HOOK_ORPHAN) == 0) {
422 hookptr = &priv->orphan;
423 NG_HOOK_SET_RCVDATA(hook, ng_ether_rcv_lower);
424 } else
425 return (EINVAL);
426
427 /* Check if already connected (shouldn't be, but doesn't hurt) */
428 if (*hookptr != NULL)
429 return (EISCONN);
430
431 /* Disable hardware checksums while 'upper' hook is connected */
432 if (hookptr == &priv->upper)
433 priv->ifp->if_hwassist = 0;
434 NG_HOOK_HI_STACK(hook);
435 /* OK */
436 *hookptr = hook;
437 return (0);
438}
439
440/*
441 * Receive an incoming control message.
442 */
443static int
444ng_ether_rcvmsg(node_p node, item_p item, hook_p lasthook)
445{
446 const priv_p priv = NG_NODE_PRIVATE(node);
447 struct ng_mesg *resp = NULL;
448 int error = 0;
449 struct ng_mesg *msg;
450
451 NGI_GET_MSG(item, msg);
452 switch (msg->header.typecookie) {
453 case NGM_ETHER_COOKIE:
454 switch (msg->header.cmd) {
455 case NGM_ETHER_GET_IFNAME:
456 NG_MKRESPONSE(resp, msg, IFNAMSIZ, M_NOWAIT);
457 if (resp == NULL) {
458 error = ENOMEM;
459 break;
460 }
461 strlcpy(resp->data, priv->ifp->if_xname, IFNAMSIZ);
462 break;
463 case NGM_ETHER_GET_IFINDEX:
464 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
465 if (resp == NULL) {
466 error = ENOMEM;
467 break;
468 }
469 *((u_int32_t *)resp->data) = priv->ifp->if_index;
470 break;
471 case NGM_ETHER_GET_ENADDR:
472 NG_MKRESPONSE(resp, msg, ETHER_ADDR_LEN, M_NOWAIT);
473 if (resp == NULL) {
474 error = ENOMEM;
475 break;
476 }
477 bcopy(IF_LLADDR(priv->ifp),
478 resp->data, ETHER_ADDR_LEN);
479 break;
480 case NGM_ETHER_SET_ENADDR:
481 {
482 if (msg->header.arglen != ETHER_ADDR_LEN) {
483 error = EINVAL;
484 break;
485 }
486 error = if_setlladdr(priv->ifp,
487 (u_char *)msg->data, ETHER_ADDR_LEN);
488 EVENTHANDLER_INVOKE(iflladdr_event, priv->ifp);
489 break;
490 }
491 case NGM_ETHER_GET_PROMISC:
492 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
493 if (resp == NULL) {
494 error = ENOMEM;
495 break;
496 }
497 *((u_int32_t *)resp->data) = priv->promisc;
498 break;
499 case NGM_ETHER_SET_PROMISC:
500 {
501 u_char want;
502
503 if (msg->header.arglen != sizeof(u_int32_t)) {
504 error = EINVAL;
505 break;
506 }
507 want = !!*((u_int32_t *)msg->data);
508 if (want ^ priv->promisc) {
509 if ((error = ifpromisc(priv->ifp, want)) != 0)
510 break;
511 priv->promisc = want;
512 }
513 break;
514 }
515 case NGM_ETHER_GET_AUTOSRC:
516 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
517 if (resp == NULL) {
518 error = ENOMEM;
519 break;
520 }
521 *((u_int32_t *)resp->data) = priv->autoSrcAddr;
522 break;
523 case NGM_ETHER_SET_AUTOSRC:
524 if (msg->header.arglen != sizeof(u_int32_t)) {
525 error = EINVAL;
526 break;
527 }
528 priv->autoSrcAddr = !!*((u_int32_t *)msg->data);
529 break;
530 case NGM_ETHER_ADD_MULTI:
531 {
532 struct sockaddr_dl sa_dl;
533 struct ifmultiaddr *ifma;
534
535 if (msg->header.arglen != ETHER_ADDR_LEN) {
536 error = EINVAL;
537 break;
538 }
539 bzero(&sa_dl, sizeof(struct sockaddr_dl));
540 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
541 sa_dl.sdl_family = AF_LINK;
542 sa_dl.sdl_alen = ETHER_ADDR_LEN;
543 bcopy((void *)msg->data, LLADDR(&sa_dl),
544 ETHER_ADDR_LEN);
545 /*
546 * Netgraph is only permitted to join groups once
547 * via the if_addmulti() KPI, because it cannot hold
548 * struct ifmultiaddr * between calls. It may also
549 * lose a race while we check if the membership
550 * already exists.
551 */
552 if_maddr_rlock(priv->ifp);
553 ifma = if_findmulti(priv->ifp,
554 (struct sockaddr *)&sa_dl);
555 if_maddr_runlock(priv->ifp);
556 if (ifma != NULL) {
557 error = EADDRINUSE;
558 } else {
559 error = if_addmulti(priv->ifp,
560 (struct sockaddr *)&sa_dl, &ifma);
561 }
562 break;
563 }
564 case NGM_ETHER_DEL_MULTI:
565 {
566 struct sockaddr_dl sa_dl;
567
568 if (msg->header.arglen != ETHER_ADDR_LEN) {
569 error = EINVAL;
570 break;
571 }
572 bzero(&sa_dl, sizeof(struct sockaddr_dl));
573 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
574 sa_dl.sdl_family = AF_LINK;
575 sa_dl.sdl_alen = ETHER_ADDR_LEN;
576 bcopy((void *)msg->data, LLADDR(&sa_dl),
577 ETHER_ADDR_LEN);
578 error = if_delmulti(priv->ifp,
579 (struct sockaddr *)&sa_dl);
580 break;
581 }
582 case NGM_ETHER_DETACH:
583 ng_ether_detach(priv->ifp);
584 break;
585 default:
586 error = EINVAL;
587 break;
588 }
589 break;
590 default:
591 error = EINVAL;
592 break;
593 }
594 NG_RESPOND_MSG(error, node, item, resp);
595 NG_FREE_MSG(msg);
596 return (error);
597}
598
599/*
600 * Receive data on a hook.
601 * Since we use per-hook recveive methods this should never be called.
602 */
603static int
604ng_ether_rcvdata(hook_p hook, item_p item)
605{
606 NG_FREE_ITEM(item);
607
608 panic("%s: weird hook", __func__);
609}
610
611/*
612 * Handle an mbuf received on the "lower" or "orphan" hook.
613 */
614static int
615ng_ether_rcv_lower(hook_p hook, item_p item)
616{
617 struct mbuf *m;
618 const node_p node = NG_HOOK_NODE(hook);
619 const priv_p priv = NG_NODE_PRIVATE(node);
620 struct ifnet *const ifp = priv->ifp;
621
622 NGI_GET_M(item, m);
623 NG_FREE_ITEM(item);
624
625 /* Check whether interface is ready for packets */
626
627 if (!((ifp->if_flags & IFF_UP) &&
628 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
629 NG_FREE_M(m);
630 return (ENETDOWN);
631 }
632
633 /* Make sure header is fully pulled up */
634 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
635 NG_FREE_M(m);
636 return (EINVAL);
637 }
638 if (m->m_len < sizeof(struct ether_header)
639 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
640 return (ENOBUFS);
641
642 /* Drop in the MAC address if desired */
643 if (priv->autoSrcAddr) {
644
645 /* Make the mbuf writable if it's not already */
646 if (!M_WRITABLE(m)
647 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
648 return (ENOBUFS);
649
650 /* Overwrite source MAC address */
651 bcopy(IF_LLADDR(ifp),
652 mtod(m, struct ether_header *)->ether_shost,
653 ETHER_ADDR_LEN);
654 }
655
656 /* Send it on its way */
657 return ether_output_frame(ifp, m);
658}
659
660/*
661 * Handle an mbuf received on the "upper" hook.
662 */
663static int
664ng_ether_rcv_upper(hook_p hook, item_p item)
665{
666 struct mbuf *m;
667 const node_p node = NG_HOOK_NODE(hook);
668 const priv_p priv = NG_NODE_PRIVATE(node);
669 struct ifnet *ifp = priv->ifp;
670
671 NGI_GET_M(item, m);
672 NG_FREE_ITEM(item);
673
674 /* Check length and pull off header */
675 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
676 NG_FREE_M(m);
677 return (EINVAL);
678 }
679 if (m->m_len < sizeof(struct ether_header) &&
680 (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
681 return (ENOBUFS);
682
683 m->m_pkthdr.rcvif = ifp;
684
685 /* Pass the packet to the bridge, it may come back to us */
686 if (ifp->if_bridge) {
687 BRIDGE_INPUT(ifp, m);
688 if (m == NULL)
689 return (0);
690 }
691
692 /* Route packet back in */
693 ether_demux(ifp, m);
694 return (0);
695}
696
697/*
698 * Shutdown node. This resets the node but does not remove it
699 * unless the REALLY_DIE flag is set.
700 */
701static int
702ng_ether_shutdown(node_p node)
703{
704 const priv_p priv = NG_NODE_PRIVATE(node);
705
706 if (node->nd_flags & NGF_REALLY_DIE) {
707 /*
708 * WE came here because the ethernet card is being unloaded,
709 * so stop being persistant.
710 * Actually undo all the things we did on creation.
711 * Assume the ifp has already been freed.
712 */
713 NG_NODE_SET_PRIVATE(node, NULL);
714 free(priv, M_NETGRAPH);
715 NG_NODE_UNREF(node); /* free node itself */
716 return (0);
717 }
718 if (priv->promisc) { /* disable promiscuous mode */
719 (void)ifpromisc(priv->ifp, 0);
720 priv->promisc = 0;
721 }
722 NG_NODE_REVIVE(node); /* Signal ng_rmnode we are persisant */
723
724 return (0);
725}
726
727/*
728 * Hook disconnection.
729 */
730static int
731ng_ether_disconnect(hook_p hook)
732{
733 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
734
735 if (hook == priv->upper) {
736 priv->upper = NULL;
737 if (priv->ifp != NULL) /* restore h/w csum */
738 priv->ifp->if_hwassist = priv->hwassist;
739 } else if (hook == priv->lower)
740 priv->lower = NULL;
741 else if (hook == priv->orphan)
742 priv->orphan = NULL;
743 else
744 panic("%s: weird hook", __func__);
745 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
746 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
747 ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */
748 return (0);
749}
750
751/******************************************************************
752 INITIALIZATION
753******************************************************************/
754
755/*
756 * Handle loading and unloading for this node type.
757 */
758static int
759ng_ether_mod_event(module_t mod, int event, void *data)
760{
761 int error = 0;
| 240 */
241static void
242ng_ether_input_orphan(struct ifnet *ifp, struct mbuf *m)
243{
244 const node_p node = IFP2NG(ifp);
245 const priv_p priv = NG_NODE_PRIVATE(node);
246 int error;
247
248 /* If "orphan" hook not connected, discard packet */
249 if (priv->orphan == NULL) {
250 m_freem(m);
251 return;
252 }
253 NG_SEND_DATA_ONLY(error, priv->orphan, m);
254}
255
256/*
257 * Handle a packet that is going out on an interface.
258 * The Ethernet header is already attached to the mbuf.
259 */
260static int
261ng_ether_output(struct ifnet *ifp, struct mbuf **mp)
262{
263 const node_p node = IFP2NG(ifp);
264 const priv_p priv = NG_NODE_PRIVATE(node);
265 int error = 0;
266
267 /* If "upper" hook not connected, let packet continue */
268 if (priv->upper == NULL)
269 return (0);
270
271 /* Send it out "upper" hook */
272 NG_OUTBOUND_THREAD_REF();
273 NG_SEND_DATA_ONLY(error, priv->upper, *mp);
274 NG_OUTBOUND_THREAD_UNREF();
275 return (error);
276}
277
278/*
279 * A new Ethernet interface has been attached.
280 * Create a new node for it, etc.
281 */
282static void
283ng_ether_attach(struct ifnet *ifp)
284{
285 priv_p priv;
286 node_p node;
287
288 /*
289 * Do not create / attach an ether node to this ifnet if
290 * a netgraph node with the same name already exists.
291 * This should prevent ether nodes to become attached to
292 * eiface nodes, which may be problematic due to naming
293 * clashes.
294 */
295 if ((node = ng_name2noderef(NULL, ifp->if_xname)) != NULL) {
296 NG_NODE_UNREF(node);
297 return;
298 }
299
300 /* Create node */
301 KASSERT(!IFP2NG(ifp), ("%s: node already exists?", __func__));
302 if (ng_make_node_common(&ng_ether_typestruct, &node) != 0) {
303 log(LOG_ERR, "%s: can't %s for %s\n",
304 __func__, "create node", ifp->if_xname);
305 return;
306 }
307
308 /* Allocate private data */
309 priv = malloc(sizeof(*priv), M_NETGRAPH, M_NOWAIT | M_ZERO);
310 if (priv == NULL) {
311 log(LOG_ERR, "%s: can't %s for %s\n",
312 __func__, "allocate memory", ifp->if_xname);
313 NG_NODE_UNREF(node);
314 return;
315 }
316 NG_NODE_SET_PRIVATE(node, priv);
317 priv->ifp = ifp;
318 IFP2NG(ifp) = node;
319 priv->hwassist = ifp->if_hwassist;
320
321 /* Try to give the node the same name as the interface */
322 if (ng_name_node(node, ifp->if_xname) != 0) {
323 log(LOG_WARNING, "%s: can't name node %s\n",
324 __func__, ifp->if_xname);
325 }
326}
327
328/*
329 * An Ethernet interface is being detached.
330 * REALLY Destroy its node.
331 */
332static void
333ng_ether_detach(struct ifnet *ifp)
334{
335 const node_p node = IFP2NG(ifp);
336 const priv_p priv = NG_NODE_PRIVATE(node);
337
338 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
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 (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
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 }
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 EVENTHANDLER_INVOKE(iflladdr_event, priv->ifp);
485 break;
486 }
487 case NGM_ETHER_GET_PROMISC:
488 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
489 if (resp == NULL) {
490 error = ENOMEM;
491 break;
492 }
493 *((u_int32_t *)resp->data) = priv->promisc;
494 break;
495 case NGM_ETHER_SET_PROMISC:
496 {
497 u_char want;
498
499 if (msg->header.arglen != sizeof(u_int32_t)) {
500 error = EINVAL;
501 break;
502 }
503 want = !!*((u_int32_t *)msg->data);
504 if (want ^ priv->promisc) {
505 if ((error = ifpromisc(priv->ifp, want)) != 0)
506 break;
507 priv->promisc = want;
508 }
509 break;
510 }
511 case NGM_ETHER_GET_AUTOSRC:
512 NG_MKRESPONSE(resp, msg, sizeof(u_int32_t), M_NOWAIT);
513 if (resp == NULL) {
514 error = ENOMEM;
515 break;
516 }
517 *((u_int32_t *)resp->data) = priv->autoSrcAddr;
518 break;
519 case NGM_ETHER_SET_AUTOSRC:
520 if (msg->header.arglen != sizeof(u_int32_t)) {
521 error = EINVAL;
522 break;
523 }
524 priv->autoSrcAddr = !!*((u_int32_t *)msg->data);
525 break;
526 case NGM_ETHER_ADD_MULTI:
527 {
528 struct sockaddr_dl sa_dl;
529 struct ifmultiaddr *ifma;
530
531 if (msg->header.arglen != ETHER_ADDR_LEN) {
532 error = EINVAL;
533 break;
534 }
535 bzero(&sa_dl, sizeof(struct sockaddr_dl));
536 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
537 sa_dl.sdl_family = AF_LINK;
538 sa_dl.sdl_alen = ETHER_ADDR_LEN;
539 bcopy((void *)msg->data, LLADDR(&sa_dl),
540 ETHER_ADDR_LEN);
541 /*
542 * Netgraph is only permitted to join groups once
543 * via the if_addmulti() KPI, because it cannot hold
544 * struct ifmultiaddr * between calls. It may also
545 * lose a race while we check if the membership
546 * already exists.
547 */
548 if_maddr_rlock(priv->ifp);
549 ifma = if_findmulti(priv->ifp,
550 (struct sockaddr *)&sa_dl);
551 if_maddr_runlock(priv->ifp);
552 if (ifma != NULL) {
553 error = EADDRINUSE;
554 } else {
555 error = if_addmulti(priv->ifp,
556 (struct sockaddr *)&sa_dl, &ifma);
557 }
558 break;
559 }
560 case NGM_ETHER_DEL_MULTI:
561 {
562 struct sockaddr_dl sa_dl;
563
564 if (msg->header.arglen != ETHER_ADDR_LEN) {
565 error = EINVAL;
566 break;
567 }
568 bzero(&sa_dl, sizeof(struct sockaddr_dl));
569 sa_dl.sdl_len = sizeof(struct sockaddr_dl);
570 sa_dl.sdl_family = AF_LINK;
571 sa_dl.sdl_alen = ETHER_ADDR_LEN;
572 bcopy((void *)msg->data, LLADDR(&sa_dl),
573 ETHER_ADDR_LEN);
574 error = if_delmulti(priv->ifp,
575 (struct sockaddr *)&sa_dl);
576 break;
577 }
578 case NGM_ETHER_DETACH:
579 ng_ether_detach(priv->ifp);
580 break;
581 default:
582 error = EINVAL;
583 break;
584 }
585 break;
586 default:
587 error = EINVAL;
588 break;
589 }
590 NG_RESPOND_MSG(error, node, item, resp);
591 NG_FREE_MSG(msg);
592 return (error);
593}
594
595/*
596 * Receive data on a hook.
597 * Since we use per-hook recveive methods this should never be called.
598 */
599static int
600ng_ether_rcvdata(hook_p hook, item_p item)
601{
602 NG_FREE_ITEM(item);
603
604 panic("%s: weird hook", __func__);
605}
606
607/*
608 * Handle an mbuf received on the "lower" or "orphan" hook.
609 */
610static int
611ng_ether_rcv_lower(hook_p hook, item_p item)
612{
613 struct mbuf *m;
614 const node_p node = NG_HOOK_NODE(hook);
615 const priv_p priv = NG_NODE_PRIVATE(node);
616 struct ifnet *const ifp = priv->ifp;
617
618 NGI_GET_M(item, m);
619 NG_FREE_ITEM(item);
620
621 /* Check whether interface is ready for packets */
622
623 if (!((ifp->if_flags & IFF_UP) &&
624 (ifp->if_drv_flags & IFF_DRV_RUNNING))) {
625 NG_FREE_M(m);
626 return (ENETDOWN);
627 }
628
629 /* Make sure header is fully pulled up */
630 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
631 NG_FREE_M(m);
632 return (EINVAL);
633 }
634 if (m->m_len < sizeof(struct ether_header)
635 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
636 return (ENOBUFS);
637
638 /* Drop in the MAC address if desired */
639 if (priv->autoSrcAddr) {
640
641 /* Make the mbuf writable if it's not already */
642 if (!M_WRITABLE(m)
643 && (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
644 return (ENOBUFS);
645
646 /* Overwrite source MAC address */
647 bcopy(IF_LLADDR(ifp),
648 mtod(m, struct ether_header *)->ether_shost,
649 ETHER_ADDR_LEN);
650 }
651
652 /* Send it on its way */
653 return ether_output_frame(ifp, m);
654}
655
656/*
657 * Handle an mbuf received on the "upper" hook.
658 */
659static int
660ng_ether_rcv_upper(hook_p hook, item_p item)
661{
662 struct mbuf *m;
663 const node_p node = NG_HOOK_NODE(hook);
664 const priv_p priv = NG_NODE_PRIVATE(node);
665 struct ifnet *ifp = priv->ifp;
666
667 NGI_GET_M(item, m);
668 NG_FREE_ITEM(item);
669
670 /* Check length and pull off header */
671 if (m->m_pkthdr.len < sizeof(struct ether_header)) {
672 NG_FREE_M(m);
673 return (EINVAL);
674 }
675 if (m->m_len < sizeof(struct ether_header) &&
676 (m = m_pullup(m, sizeof(struct ether_header))) == NULL)
677 return (ENOBUFS);
678
679 m->m_pkthdr.rcvif = ifp;
680
681 /* Pass the packet to the bridge, it may come back to us */
682 if (ifp->if_bridge) {
683 BRIDGE_INPUT(ifp, m);
684 if (m == NULL)
685 return (0);
686 }
687
688 /* Route packet back in */
689 ether_demux(ifp, m);
690 return (0);
691}
692
693/*
694 * Shutdown node. This resets the node but does not remove it
695 * unless the REALLY_DIE flag is set.
696 */
697static int
698ng_ether_shutdown(node_p node)
699{
700 const priv_p priv = NG_NODE_PRIVATE(node);
701
702 if (node->nd_flags & NGF_REALLY_DIE) {
703 /*
704 * WE came here because the ethernet card is being unloaded,
705 * so stop being persistant.
706 * Actually undo all the things we did on creation.
707 * Assume the ifp has already been freed.
708 */
709 NG_NODE_SET_PRIVATE(node, NULL);
710 free(priv, M_NETGRAPH);
711 NG_NODE_UNREF(node); /* free node itself */
712 return (0);
713 }
714 if (priv->promisc) { /* disable promiscuous mode */
715 (void)ifpromisc(priv->ifp, 0);
716 priv->promisc = 0;
717 }
718 NG_NODE_REVIVE(node); /* Signal ng_rmnode we are persisant */
719
720 return (0);
721}
722
723/*
724 * Hook disconnection.
725 */
726static int
727ng_ether_disconnect(hook_p hook)
728{
729 const priv_p priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
730
731 if (hook == priv->upper) {
732 priv->upper = NULL;
733 if (priv->ifp != NULL) /* restore h/w csum */
734 priv->ifp->if_hwassist = priv->hwassist;
735 } else if (hook == priv->lower)
736 priv->lower = NULL;
737 else if (hook == priv->orphan)
738 priv->orphan = NULL;
739 else
740 panic("%s: weird hook", __func__);
741 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
742 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook))))
743 ng_rmnode_self(NG_HOOK_NODE(hook)); /* reset node */
744 return (0);
745}
746
747/******************************************************************
748 INITIALIZATION
749******************************************************************/
750
751/*
752 * Handle loading and unloading for this node type.
753 */
754static int
755ng_ether_mod_event(module_t mod, int event, void *data)
756{
757 int error = 0;
|
762 int s;
| |
763
| 758
|
764 s = splnet();
| |
765 switch (event) {
766 case MOD_LOAD:
767
768 /* Register function hooks */
769 if (ng_ether_attach_p != NULL) {
770 error = EEXIST;
771 break;
772 }
773 ng_ether_attach_p = ng_ether_attach;
774 ng_ether_detach_p = ng_ether_detach;
775 ng_ether_output_p = ng_ether_output;
776 ng_ether_input_p = ng_ether_input;
777 ng_ether_input_orphan_p = ng_ether_input_orphan;
778 ng_ether_link_state_p = ng_ether_link_state;
779
780 break;
781
782 case MOD_UNLOAD:
783
784 /*
785 * Note that the base code won't try to unload us until
786 * all nodes have been removed, and that can't happen
787 * until all Ethernet interfaces are removed. In any
788 * case, we know there are no nodes left if the action
789 * is MOD_UNLOAD, so there's no need to detach any nodes.
790 */
791
792 /* Unregister function hooks */
793 ng_ether_attach_p = NULL;
794 ng_ether_detach_p = NULL;
795 ng_ether_output_p = NULL;
796 ng_ether_input_p = NULL;
797 ng_ether_input_orphan_p = NULL;
798 ng_ether_link_state_p = NULL;
799 break;
800
801 default:
802 error = EOPNOTSUPP;
803 break;
804 }
| 759 switch (event) {
760 case MOD_LOAD:
761
762 /* Register function hooks */
763 if (ng_ether_attach_p != NULL) {
764 error = EEXIST;
765 break;
766 }
767 ng_ether_attach_p = ng_ether_attach;
768 ng_ether_detach_p = ng_ether_detach;
769 ng_ether_output_p = ng_ether_output;
770 ng_ether_input_p = ng_ether_input;
771 ng_ether_input_orphan_p = ng_ether_input_orphan;
772 ng_ether_link_state_p = ng_ether_link_state;
773
774 break;
775
776 case MOD_UNLOAD:
777
778 /*
779 * Note that the base code won't try to unload us until
780 * all nodes have been removed, and that can't happen
781 * until all Ethernet interfaces are removed. In any
782 * case, we know there are no nodes left if the action
783 * is MOD_UNLOAD, so there's no need to detach any nodes.
784 */
785
786 /* Unregister function hooks */
787 ng_ether_attach_p = NULL;
788 ng_ether_detach_p = NULL;
789 ng_ether_output_p = NULL;
790 ng_ether_input_p = NULL;
791 ng_ether_input_orphan_p = NULL;
792 ng_ether_link_state_p = NULL;
793 break;
794
795 default:
796 error = EOPNOTSUPP;
797 break;
798 }
|
805 splx(s);
| |
806 return (error);
807}
808
809static void
810vnet_ng_ether_init(const void *unused)
811{
812 struct ifnet *ifp;
813
814 /* If module load was rejected, don't attach to vnets. */
815 if (ng_ether_attach_p != ng_ether_attach)
816 return;
817
818 /* Create nodes for any already-existing Ethernet interfaces. */
819 IFNET_RLOCK();
820 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
821 if (ifp->if_type == IFT_ETHER
822 || ifp->if_type == IFT_L2VLAN)
823 ng_ether_attach(ifp);
824 }
825 IFNET_RUNLOCK();
826}
827VNET_SYSINIT(vnet_ng_ether_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
828 vnet_ng_ether_init, NULL);
| 799 return (error);
800}
801
802static void
803vnet_ng_ether_init(const void *unused)
804{
805 struct ifnet *ifp;
806
807 /* If module load was rejected, don't attach to vnets. */
808 if (ng_ether_attach_p != ng_ether_attach)
809 return;
810
811 /* Create nodes for any already-existing Ethernet interfaces. */
812 IFNET_RLOCK();
813 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
814 if (ifp->if_type == IFT_ETHER
815 || ifp->if_type == IFT_L2VLAN)
816 ng_ether_attach(ifp);
817 }
818 IFNET_RUNLOCK();
819}
820VNET_SYSINIT(vnet_ng_ether_init, SI_SUB_PSEUDO, SI_ORDER_ANY,
821 vnet_ng_ether_init, NULL);
|