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if_stf.c (129880) if_stf.c (130933)
1/* $FreeBSD: head/sys/net/if_stf.c 129880 2004-05-30 20:27:19Z phk $ */
1/* $FreeBSD: head/sys/net/if_stf.c 130933 2004-06-22 20:13:25Z brooks $ */
2/* $KAME: if_stf.c,v 1.73 2001/12/03 11:08:30 keiichi Exp $ */
3
4/*
5 * Copyright (C) 2000 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions

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89#include <sys/module.h>
90#include <sys/protosw.h>
91#include <sys/queue.h>
92#include <machine/cpu.h>
93
94#include <sys/malloc.h>
95
96#include <net/if.h>
2/* $KAME: if_stf.c,v 1.73 2001/12/03 11:08:30 keiichi Exp $ */
3
4/*
5 * Copyright (C) 2000 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions

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89#include <sys/module.h>
90#include <sys/protosw.h>
91#include <sys/queue.h>
92#include <machine/cpu.h>
93
94#include <sys/malloc.h>
95
96#include <net/if.h>
97#include <net/if_clone.h>
97#include <net/route.h>
98#include <net/netisr.h>
99#include <net/if_types.h>
100#include <net/if_stf.h>
101
102#include <netinet/in.h>
103#include <netinet/in_systm.h>
104#include <netinet/ip.h>

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114
115#include <machine/stdarg.h>
116
117#include <net/net_osdep.h>
118
119#include <net/bpf.h>
120
121#define STFNAME "stf"
98#include <net/route.h>
99#include <net/netisr.h>
100#include <net/if_types.h>
101#include <net/if_stf.h>
102
103#include <netinet/in.h>
104#include <netinet/in_systm.h>
105#include <netinet/ip.h>

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115
116#include <machine/stdarg.h>
117
118#include <net/net_osdep.h>
119
120#include <net/bpf.h>
121
122#define STFNAME "stf"
123#define STFUNIT 0
122
123#define IN6_IS_ADDR_6TO4(x) (ntohs((x)->s6_addr16[0]) == 0x2002)
124
125/*
126 * XXX: Return a pointer with 16-bit aligned. Don't cast it to
127 * struct in_addr *; use bcopy() instead.
128 */
129#define GET_V4(x) ((caddr_t)(&(x)->s6_addr16[1]))

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155struct protosw in_stf_protosw =
156{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
157 in_stf_input, (pr_output_t*)rip_output, 0, rip_ctloutput,
158 0,
159 0, 0, 0, 0,
160 &rip_usrreqs
161};
162
124
125#define IN6_IS_ADDR_6TO4(x) (ntohs((x)->s6_addr16[0]) == 0x2002)
126
127/*
128 * XXX: Return a pointer with 16-bit aligned. Don't cast it to
129 * struct in_addr *; use bcopy() instead.
130 */
131#define GET_V4(x) ((caddr_t)(&(x)->s6_addr16[1]))

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157struct protosw in_stf_protosw =
158{ SOCK_RAW, &inetdomain, IPPROTO_IPV6, PR_ATOMIC|PR_ADDR,
159 in_stf_input, (pr_output_t*)rip_output, 0, rip_ctloutput,
160 0,
161 0, 0, 0, 0,
162 &rip_usrreqs
163};
164
165static char *stfnames[] = {"stf0", "stf", "6to4", NULL};
166
163static int stfmodevent(module_t, int, void *);
164static int stf_encapcheck(const struct mbuf *, int, int, void *);
165static struct in6_ifaddr *stf_getsrcifa6(struct ifnet *);
166static int stf_output(struct ifnet *, struct mbuf *, struct sockaddr *,
167 struct rtentry *);
168static int isrfc1918addr(struct in_addr *);
169static int stf_checkaddr4(struct stf_softc *, struct in_addr *,
170 struct ifnet *);
171static int stf_checkaddr6(struct stf_softc *, struct in6_addr *,
172 struct ifnet *);
173static void stf_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
174static int stf_ioctl(struct ifnet *, u_long, caddr_t);
175
167static int stfmodevent(module_t, int, void *);
168static int stf_encapcheck(const struct mbuf *, int, int, void *);
169static struct in6_ifaddr *stf_getsrcifa6(struct ifnet *);
170static int stf_output(struct ifnet *, struct mbuf *, struct sockaddr *,
171 struct rtentry *);
172static int isrfc1918addr(struct in_addr *);
173static int stf_checkaddr4(struct stf_softc *, struct in_addr *,
174 struct ifnet *);
175static int stf_checkaddr6(struct stf_softc *, struct in6_addr *,
176 struct ifnet *);
177static void stf_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
178static int stf_ioctl(struct ifnet *, u_long, caddr_t);
179
176static int stf_clone_create(struct if_clone *, int);
177static void stf_clone_destroy(struct ifnet *);
180static int stf_clone_match(struct if_clone *, const char *);
181static int stf_clone_create(struct if_clone *, char *, size_t);
182static int stf_clone_destroy(struct if_clone *, struct ifnet *);
183struct if_clone stf_cloner = IFC_CLONE_INITIALIZER(STFNAME, NULL, 0,
184 NULL, stf_clone_match, stf_clone_create, stf_clone_destroy);
178
185
179/* only one clone is currently allowed */
180struct if_clone stf_cloner =
181 IF_CLONE_INITIALIZER(STFNAME, stf_clone_create, stf_clone_destroy, 0, 0);
186static int
187stf_clone_match(struct if_clone *ifc, const char *name)
188{
189 int i;
182
190
191 for(i = 0; stfnames[i] != NULL; i++) {
192 if (strcmp(stfnames[i], name) == 0)
193 return (1);
194 }
195
196 return (0);
197}
198
183static int
199static int
184stf_clone_create(ifc, unit)
185 struct if_clone *ifc;
186 int unit;
200stf_clone_create(struct if_clone *ifc, char *name, size_t len)
187{
201{
202 int err, unit;
188 struct stf_softc *sc;
189 struct ifnet *ifp;
190
203 struct stf_softc *sc;
204 struct ifnet *ifp;
205
206 /*
207 * We can only have one unit, but since unit allocation is
208 * already locked, we use it to keep from allocating extra
209 * interfaces.
210 */
211 unit = STFUNIT;
212 err = ifc_alloc_unit(ifc, &unit);
213 if (err != 0)
214 return (err);
215
191 sc = malloc(sizeof(struct stf_softc), M_STF, M_WAITOK | M_ZERO);
192 ifp = &sc->sc_if;
216 sc = malloc(sizeof(struct stf_softc), M_STF, M_WAITOK | M_ZERO);
217 ifp = &sc->sc_if;
193 if_initname(ifp, ifc->ifc_name, unit);
218 /*
219 * Set the name manually rather then using if_initname because
220 * we don't conform to the default naming convention for interfaces.
221 */
222 strlcpy(ifp->if_xname, name, IFNAMSIZ);
223 ifp->if_dname = ifc->ifc_name;
224 ifp->if_dunit = IF_DUNIT_NONE;
194
195 sc->encap_cookie = encap_attach_func(AF_INET, IPPROTO_IPV6,
196 stf_encapcheck, &in_stf_protosw, sc);
197 if (sc->encap_cookie == NULL) {
198 if_printf(ifp, "attach failed\n");
199 free(sc, M_STF);
225
226 sc->encap_cookie = encap_attach_func(AF_INET, IPPROTO_IPV6,
227 stf_encapcheck, &in_stf_protosw, sc);
228 if (sc->encap_cookie == NULL) {
229 if_printf(ifp, "attach failed\n");
230 free(sc, M_STF);
231 ifc_free_unit(ifc, unit);
200 return (ENOMEM);
201 }
202
203 ifp->if_mtu = IPV6_MMTU;
204 ifp->if_ioctl = stf_ioctl;
205 ifp->if_output = stf_output;
206 ifp->if_type = IFT_STF;
207 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;

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221 err = encap_detach(sc->encap_cookie);
222 KASSERT(err == 0, ("Unexpected error detaching encap_cookie"));
223 bpfdetach(&sc->sc_if);
224 if_detach(&sc->sc_if);
225
226 free(sc, M_STF);
227}
228
232 return (ENOMEM);
233 }
234
235 ifp->if_mtu = IPV6_MMTU;
236 ifp->if_ioctl = stf_ioctl;
237 ifp->if_output = stf_output;
238 ifp->if_type = IFT_STF;
239 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;

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253 err = encap_detach(sc->encap_cookie);
254 KASSERT(err == 0, ("Unexpected error detaching encap_cookie"));
255 bpfdetach(&sc->sc_if);
256 if_detach(&sc->sc_if);
257
258 free(sc, M_STF);
259}
260
229static void
230stf_clone_destroy(ifp)
231 struct ifnet *ifp;
261static int
262stf_clone_destroy(struct if_clone *ifc, struct ifnet *ifp)
232{
233 struct stf_softc *sc = (void *) ifp;
234
235 mtx_lock(&stf_mtx);
236 LIST_REMOVE(sc, sc_list);
237 mtx_unlock(&stf_mtx);
238
239 stf_destroy(sc);
263{
264 struct stf_softc *sc = (void *) ifp;
265
266 mtx_lock(&stf_mtx);
267 LIST_REMOVE(sc, sc_list);
268 mtx_unlock(&stf_mtx);
269
270 stf_destroy(sc);
271 ifc_free_unit(ifc, STFUNIT);
272
273 return (0);
240}
241
242static int
243stfmodevent(mod, type, data)
244 module_t mod;
245 int type;
246 void *data;
247{

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275
276static int
277stfmodevent(mod, type, data)
278 module_t mod;
279 int type;
280 void *data;
281{

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