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if_gre.c (125226) if_gre.c (127307)
1/* $NetBSD: if_gre.c,v 1.49 2003/12/11 00:22:29 itojun Exp $ */
1/* $NetBSD: if_gre.c,v 1.49 2003/12/11 00:22:29 itojun Exp $ */
2/* $FreeBSD: head/sys/net/if_gre.c 125226 2004-01-30 09:03:01Z sobomax $ */
2/* $FreeBSD: head/sys/net/if_gre.c 127307 2004-03-22 16:04:43Z rwatson $ */
3
4/*
5 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Heiko W.Rupp <hwr@pilhuhn.de>
10 *

--- 75 unchanged lines hidden (view full) ---

86 * It is not easy to calculate the right value for a GRE MTU.
87 * We leave this task to the admin and use the same default that
88 * other vendors use.
89 */
90#define GREMTU 1476
91
92#define GRENAME "gre"
93
3
4/*
5 * Copyright (c) 1998 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Heiko W.Rupp <hwr@pilhuhn.de>
10 *

--- 75 unchanged lines hidden (view full) ---

86 * It is not easy to calculate the right value for a GRE MTU.
87 * We leave this task to the admin and use the same default that
88 * other vendors use.
89 */
90#define GREMTU 1476
91
92#define GRENAME "gre"
93
94/*
95 * gre_mtx protects all global variables in if_gre.c.
96 * XXX: gre_softc data not protected yet.
97 */
98struct mtx gre_mtx;
94static MALLOC_DEFINE(M_GRE, GRENAME, "Generic Routing Encapsulation");
95
96struct gre_softc_head gre_softc_list;
97
98static int gre_clone_create(struct if_clone *, int);
99static void gre_clone_destroy(struct ifnet *);
100static int gre_ioctl(struct ifnet *, u_long, caddr_t);
101static int gre_output(struct ifnet *, struct mbuf *, struct sockaddr *,

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144SYSCTL_INT(_net_link_gre, OID_AUTO, max_nesting, CTLFLAG_RW,
145 &max_gre_nesting, 0, "Max nested tunnels");
146
147/* ARGSUSED */
148static void
149greattach(void)
150{
151
99static MALLOC_DEFINE(M_GRE, GRENAME, "Generic Routing Encapsulation");
100
101struct gre_softc_head gre_softc_list;
102
103static int gre_clone_create(struct if_clone *, int);
104static void gre_clone_destroy(struct ifnet *);
105static int gre_ioctl(struct ifnet *, u_long, caddr_t);
106static int gre_output(struct ifnet *, struct mbuf *, struct sockaddr *,

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149SYSCTL_INT(_net_link_gre, OID_AUTO, max_nesting, CTLFLAG_RW,
150 &max_gre_nesting, 0, "Max nested tunnels");
151
152/* ARGSUSED */
153static void
154greattach(void)
155{
156
157 mtx_init(&gre_mtx, "gre_mtx", NULL, MTX_DEF);
152 LIST_INIT(&gre_softc_list);
153 if_clone_attach(&gre_cloner);
154}
155
156static int
157gre_clone_create(ifc, unit)
158 struct if_clone *ifc;
159 int unit;

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176 sc->g_dst.s_addr = sc->g_src.s_addr = INADDR_ANY;
177 sc->g_proto = IPPROTO_GRE;
178 sc->sc_if.if_flags |= IFF_LINK0;
179 sc->encap = NULL;
180 sc->called = 0;
181 sc->wccp_ver = WCCP_V1;
182 if_attach(&sc->sc_if);
183 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int32_t));
158 LIST_INIT(&gre_softc_list);
159 if_clone_attach(&gre_cloner);
160}
161
162static int
163gre_clone_create(ifc, unit)
164 struct if_clone *ifc;
165 int unit;

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182 sc->g_dst.s_addr = sc->g_src.s_addr = INADDR_ANY;
183 sc->g_proto = IPPROTO_GRE;
184 sc->sc_if.if_flags |= IFF_LINK0;
185 sc->encap = NULL;
186 sc->called = 0;
187 sc->wccp_ver = WCCP_V1;
188 if_attach(&sc->sc_if);
189 bpfattach(&sc->sc_if, DLT_NULL, sizeof(u_int32_t));
190 mtx_lock(&gre_mtx);
184 LIST_INSERT_HEAD(&gre_softc_list, sc, sc_list);
191 LIST_INSERT_HEAD(&gre_softc_list, sc, sc_list);
192 mtx_unlock(&gre_mtx);
185 return (0);
186}
187
188static void
193 return (0);
194}
195
196static void
189gre_clone_destroy(ifp)
190 struct ifnet *ifp;
197gre_destroy(struct gre_softc *sc)
191{
198{
192 struct gre_softc *sc = ifp->if_softc;
193
194#ifdef INET
195 if (sc->encap != NULL)
196 encap_detach(sc->encap);
197#endif
199
200#ifdef INET
201 if (sc->encap != NULL)
202 encap_detach(sc->encap);
203#endif
198 LIST_REMOVE(sc, sc_list);
199 bpfdetach(ifp);
200 if_detach(ifp);
204 bpfdetach(&sc->sc_if);
205 if_detach(&sc->sc_if);
201 free(sc, M_GRE);
202}
203
206 free(sc, M_GRE);
207}
208
209static void
210gre_clone_destroy(ifp)
211 struct ifnet *ifp;
212{
213 struct gre_softc *sc = ifp->if_softc;
214
215 mtx_lock(&gre_mtx);
216 LIST_REMOVE(sc, sc_list);
217 mtx_unlock(&gre_mtx);
218 gre_destroy(sc);
219}
220
204/*
205 * The output routine. Takes a packet and encapsulates it in the protocol
206 * given by sc->g_proto. See also RFC 1701 and RFC 2004
207 */
208static int
209gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
210 struct rtentry *rt)
211{

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722 sum = (sum >> 16) + (sum & 0xffff);
723 sum += (sum >> 16);
724 return (~sum);
725}
726
727static int
728gremodevent(module_t mod, int type, void *data)
729{
221/*
222 * The output routine. Takes a packet and encapsulates it in the protocol
223 * given by sc->g_proto. See also RFC 1701 and RFC 2004
224 */
225static int
226gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
227 struct rtentry *rt)
228{

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739 sum = (sum >> 16) + (sum & 0xffff);
740 sum += (sum >> 16);
741 return (~sum);
742}
743
744static int
745gremodevent(module_t mod, int type, void *data)
746{
747 struct gre_softc *sc;
730
731 switch (type) {
732 case MOD_LOAD:
733 greattach();
734 break;
735 case MOD_UNLOAD:
736 if_clone_detach(&gre_cloner);
737
748
749 switch (type) {
750 case MOD_LOAD:
751 greattach();
752 break;
753 case MOD_UNLOAD:
754 if_clone_detach(&gre_cloner);
755
738 while (!LIST_EMPTY(&gre_softc_list))
739 gre_clone_destroy(&LIST_FIRST(&gre_softc_list)->sc_if);
756 mtx_lock(&gre_mtx);
757 while ((sc = LIST_FIRST(&gre_softc_list)) != NULL) {
758 LIST_REMOVE(sc, sc_list);
759 mtx_unlock(&gre_mtx);
760 gre_destroy(sc);
761 mtx_lock(&gre_mtx);
762 }
763 mtx_unlock(&gre_mtx);
764 mtx_destroy(&gre_mtx);
740 break;
741 }
742 return 0;
743}
744
745static moduledata_t gre_mod = {
746 "if_gre",
747 gremodevent,
748 0
749};
750
751DECLARE_MODULE(if_gre, gre_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
752MODULE_VERSION(if_gre, 1);
765 break;
766 }
767 return 0;
768}
769
770static moduledata_t gre_mod = {
771 "if_gre",
772 gremodevent,
773 0
774};
775
776DECLARE_MODULE(if_gre, gre_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
777MODULE_VERSION(if_gre, 1);