2 * Copyright (c) 2003-2004 Benno Rice <benno@eloquent.com.au>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sys/netgraph/ng_atmllc.c,v 1.3 2005/01/07 01:45:39 imp Exp $
27 * $DragonFly: src/sys/netgraph7/ng_atmllc.c,v 1.2 2008/06/26 23:05:35 dillon Exp $
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
35 #include <sys/socket.h>
36 #include <sys/sockio.h>
38 #include <netgraph7/ng_message.h>
39 #include <netgraph7/netgraph.h>
40 #include "ng_atmllc.h"
43 #include <net/ethernet.h> /* for M_HASFCS and ETHER_HDR_LEN */
44 #include <net/if_atm.h> /* for struct atmllc */
46 #define NG_ATMLLC_HEADER "\252\252\3\0\200\302"
47 #define NG_ATMLLC_HEADER_LEN (sizeof(struct atmllc))
48 #define NG_ATMLLC_TYPE_ETHERNET_FCS 0x0001
49 #define NG_ATMLLC_TYPE_FDDI_FCS 0x0004
50 #define NG_ATMLLC_TYPE_ETHERNET_NOFCS 0x0007
51 #define NG_ATMLLC_TYPE_FDDI_NOFCS 0x000A
53 struct ng_atmllc_priv {
59 /* Netgraph methods. */
60 static ng_constructor_t ng_atmllc_constructor;
61 static ng_shutdown_t ng_atmllc_shutdown;
62 static ng_rcvmsg_t ng_atmllc_rcvmsg;
63 static ng_newhook_t ng_atmllc_newhook;
64 static ng_rcvdata_t ng_atmllc_rcvdata;
65 static ng_disconnect_t ng_atmllc_disconnect;
67 static struct ng_type ng_atmllc_typestruct = {
68 .version = NG_ABI_VERSION,
69 .name = NG_ATMLLC_NODE_TYPE,
70 .constructor = ng_atmllc_constructor,
71 .rcvmsg = ng_atmllc_rcvmsg,
72 .shutdown = ng_atmllc_shutdown,
73 .newhook = ng_atmllc_newhook,
74 .rcvdata = ng_atmllc_rcvdata,
75 .disconnect = ng_atmllc_disconnect,
77 NETGRAPH_INIT(atmllc, &ng_atmllc_typestruct);
80 ng_atmllc_constructor(node_p node)
82 struct ng_atmllc_priv *priv;
84 priv = kmalloc(sizeof(*priv), M_NETGRAPH,
85 M_WAITOK | M_NULLOK | M_ZERO);
90 NG_NODE_SET_PRIVATE(node, priv);
96 ng_atmllc_rcvmsg(node_p node, item_p item, hook_p lasthook)
102 NGI_GET_MSG(item, msg);
103 msg->header.flags |= NGF_RESP;
104 NG_RESPOND_MSG(error, node, item, msg);
109 ng_atmllc_shutdown(node_p node)
111 struct ng_atmllc_priv *priv;
113 priv = NG_NODE_PRIVATE(node);
115 kfree(priv, M_NETGRAPH);
123 ng_atmllc_newhook(node_p node, hook_p hook, const char *name)
125 struct ng_atmllc_priv *priv;
127 priv = NG_NODE_PRIVATE(node);
129 if (strcmp(name, NG_ATMLLC_HOOK_ATM) == 0) {
130 if (priv->atm != NULL) {
134 } else if (strcmp(name, NG_ATMLLC_HOOK_ETHER) == 0) {
135 if (priv->ether != NULL) {
139 } else if (strcmp(name, NG_ATMLLC_HOOK_FDDI) == 0) {
140 if (priv->fddi != NULL) {
152 ng_atmllc_rcvdata(hook_p hook, item_p item)
154 struct ng_atmllc_priv *priv;
161 priv = NG_NODE_PRIVATE(NG_HOOK_NODE(hook));
166 if (hook == priv->atm) {
167 /* Ditch the psuedoheader. */
168 hdr = mtod(m, struct atmllc *);
169 /* m_adj(m, sizeof(struct atm_pseudohdr)); */
172 * Make sure we have the LLC and ethernet headers.
173 * The ethernet header size is slightly larger than the FDDI
174 * header, which is convenient.
176 if (m->m_len < sizeof(struct atmllc) + ETHER_HDR_LEN) {
177 m = m_pullup(m, sizeof(struct atmllc) + ETHER_HDR_LEN);
183 /* Decode the LLC header. */
184 hdr = mtod(m, struct atmllc *);
185 if (ATM_LLC_TYPE(hdr) == NG_ATMLLC_TYPE_ETHERNET_NOFCS) {
186 outhook = priv->ether;
188 } else if (ATM_LLC_TYPE(hdr) == NG_ATMLLC_TYPE_ETHERNET_FCS) {
189 m_adj(m, -ETHER_CRC_LEN);
190 outhook = priv->ether;
193 } else if (ATM_LLC_TYPE(hdr) == NG_ATMLLC_TYPE_FDDI_NOFCS) {
194 m->m_flags &= ~M_HASFCS;
195 outhook = priv->fddi;
197 } else if (ATM_LLC_TYPE(hdr) == NG_ATMLLC_TYPE_FDDI_FCS) {
198 m->m_flags |= M_HASFCS;
199 outhook = priv->fddi;
203 printf("ng_atmllc: unknown type: %x\n",
207 /* Remove the LLC header and any padding*/
208 m_adj(m, sizeof(struct atmllc) + padding);
209 } else if (hook == priv->ether) {
210 /* Add the LLC header */
211 M_PREPEND(m, NG_ATMLLC_HEADER_LEN + 2, MB_DONTWAIT);
213 printf("ng_atmllc: M_PREPEND failed\n");
217 hdr = mtod(m, struct atmllc *);
218 bzero((void *)hdr, sizeof(struct atmllc) + 2);
219 bcopy(NG_ATMLLC_HEADER, hdr->llchdr, 6);
221 if ((m->m_flags & M_HASFCS) != 0) {
222 ATM_LLC_SETTYPE(hdr, NG_ATMLLC_TYPE_ETHERNET_FCS);
225 ATM_LLC_SETTYPE(hdr, NG_ATMLLC_TYPE_ETHERNET_NOFCS);
230 } else if (hook == priv->fddi) {
231 /* Add the LLC header */
232 M_PREPEND(m, NG_ATMLLC_HEADER_LEN + 3, MB_DONTWAIT);
234 printf("ng_atmllc: M_PREPEND failed\n");
238 hdr = mtod(m, struct atmllc *);
239 bzero((void *)hdr, sizeof(struct atmllc) + 3);
240 bcopy(NG_ATMLLC_HEADER, hdr->llchdr, 6);
242 if ((m->m_flags & M_HASFCS) != 0) {
243 ATM_LLC_SETTYPE(hdr, NG_ATMLLC_TYPE_FDDI_FCS);
246 ATM_LLC_SETTYPE(hdr, NG_ATMLLC_TYPE_FDDI_NOFCS);
253 if (outhook == NULL) {
258 NG_FWD_NEW_DATA(error, item, outhook, m);
263 ng_atmllc_disconnect(hook_p hook)
266 struct ng_atmllc_priv *priv;
268 node = NG_HOOK_NODE(hook);
269 priv = NG_NODE_PRIVATE(node);
271 if (hook == priv->atm) {
273 } else if (hook == priv->ether) {
275 } else if (hook == priv->fddi) {
279 if (NG_NODE_NUMHOOKS(node) == 0 && NG_NODE_IS_VALID(node)) {
280 ng_rmnode_self(node);