Bug Summary

File:net/if_mpe.c
Warning:line 258, column 2
Value stored to 'error' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name if_mpe.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -ffreestanding -mcmodel=kernel -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -target-feature -sse2 -target-feature -sse -target-feature -3dnow -target-feature -mmx -target-feature +save-args -target-feature +retpoline-external-thunk -disable-red-zone -no-implicit-float -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -nostdsysteminc -nobuiltininc -resource-dir /usr/local/llvm16/lib/clang/16 -I /usr/src/sys -I /usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -I /usr/src/sys/arch -I /usr/src/sys/dev/pci/drm/include -I /usr/src/sys/dev/pci/drm/include/uapi -I /usr/src/sys/dev/pci/drm/amd/include/asic_reg -I /usr/src/sys/dev/pci/drm/amd/include -I /usr/src/sys/dev/pci/drm/amd/amdgpu -I /usr/src/sys/dev/pci/drm/amd/display -I /usr/src/sys/dev/pci/drm/amd/display/include -I /usr/src/sys/dev/pci/drm/amd/display/dc -I /usr/src/sys/dev/pci/drm/amd/display/amdgpu_dm -I /usr/src/sys/dev/pci/drm/amd/pm/inc -I /usr/src/sys/dev/pci/drm/amd/pm/legacy-dpm -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu11 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu12 -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/smu13 -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/inc -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/hwmgr -I /usr/src/sys/dev/pci/drm/amd/pm/powerplay/smumgr -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc -I /usr/src/sys/dev/pci/drm/amd/pm/swsmu/inc/pmfw_if -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc -I /usr/src/sys/dev/pci/drm/amd/display/dc/inc/hw -I /usr/src/sys/dev/pci/drm/amd/display/dc/clk_mgr -I /usr/src/sys/dev/pci/drm/amd/display/modules/inc -I /usr/src/sys/dev/pci/drm/amd/display/modules/hdcp -I /usr/src/sys/dev/pci/drm/amd/display/dmub/inc -I /usr/src/sys/dev/pci/drm/i915 -D DDB -D DIAGNOSTIC -D KTRACE -D ACCOUNTING -D KMEMSTATS -D PTRACE -D POOL_DEBUG -D CRYPTO -D SYSVMSG -D SYSVSEM -D SYSVSHM -D UVM_SWAP_ENCRYPT -D FFS -D FFS2 -D FFS_SOFTUPDATES -D UFS_DIRHASH -D QUOTA -D EXT2FS -D MFS -D NFSCLIENT -D NFSSERVER -D CD9660 -D UDF -D MSDOSFS -D FIFO -D FUSE -D SOCKET_SPLICE -D TCP_ECN -D TCP_SIGNATURE -D INET6 -D IPSEC -D PPP_BSDCOMP -D PPP_DEFLATE -D PIPEX -D MROUTING -D MPLS -D BOOT_CONFIG -D USER_PCICONF -D APERTURE -D MTRR -D NTFS -D SUSPEND -D HIBERNATE -D PCIVERBOSE -D USBVERBOSE -D WSDISPLAY_COMPAT_USL -D WSDISPLAY_COMPAT_RAWKBD -D WSDISPLAY_DEFAULTSCREENS=6 -D X86EMU -D ONEWIREVERBOSE -D MULTIPROCESSOR -D MAXUSERS=80 -D _KERNEL -O2 -Wno-pointer-sign -Wno-address-of-packed-member -Wno-constant-conversion -Wno-unused-but-set-variable -Wno-gnu-folding-constant -fdebug-compilation-dir=/usr/src/sys/arch/amd64/compile/GENERIC.MP/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /home/ben/Projects/scan/2024-01-11-110808-61670-1 -x c /usr/src/sys/net/if_mpe.c
1/* $OpenBSD: if_mpe.c,v 1.105 2024/01/01 18:47:02 mvs Exp $ */
2
3/*
4 * Copyright (c) 2008 Pierre-Yves Ritschard <pyr@spootnik.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <sys/param.h>
20#include <sys/systm.h>
21#include <sys/mbuf.h>
22#include <sys/socket.h>
23#include <sys/sockio.h>
24#include <sys/ioctl.h>
25
26#include <net/if.h>
27#include <net/if_dl.h>
28#include <net/if_var.h>
29#include <net/if_types.h>
30#include <net/netisr.h>
31#include <net/route.h>
32
33#include <netinet/in.h>
34#include <netinet/ip.h>
35
36#ifdef INET61
37#include <netinet/ip6.h>
38#endif /* INET6 */
39
40#include "bpfilter.h"
41#if NBPFILTER1 > 0
42#include <net/bpf.h>
43#endif
44
45#include <netmpls/mpls.h>
46
47
48
49#ifdef MPLS_DEBUG
50#define DPRINTF(x) do { if (mpedebug) printf x ; } while (0)
51#else
52#define DPRINTF(x)
53#endif
54
55struct mpe_softc {
56 struct ifnet sc_if; /* the interface */
57 int sc_txhprio;
58 int sc_rxhprio;
59 unsigned int sc_rdomain;
60 struct ifaddr sc_ifa;
61 struct sockaddr_mpls sc_smpls;
62
63 int sc_dead;
64};
65
66#define MPE_HDRLENsizeof(struct shim_hdr) sizeof(struct shim_hdr)
67#define MPE_MTU1500 1500
68#define MPE_MTU_MIN256 256
69#define MPE_MTU_MAX8192 8192
70
71void mpeattach(int);
72int mpe_output(struct ifnet *, struct mbuf *, struct sockaddr *,
73 struct rtentry *);
74int mpe_ioctl(struct ifnet *, u_long, caddr_t);
75void mpe_start(struct ifnet *);
76int mpe_clone_create(struct if_clone *, int);
77int mpe_clone_destroy(struct ifnet *);
78void mpe_input(struct ifnet *, struct mbuf *);
79
80struct if_clone mpe_cloner =
81 IF_CLONE_INITIALIZER("mpe", mpe_clone_create, mpe_clone_destroy){ .ifc_list = { ((void *)0), ((void *)0) }, .ifc_name = "mpe"
, .ifc_namelen = sizeof("mpe") - 1, .ifc_create = mpe_clone_create
, .ifc_destroy = mpe_clone_destroy, };
82
83extern int mpls_mapttl_ip;
84#ifdef INET61
85extern int mpls_mapttl_ip6;
86#endif
87
88void
89mpeattach(int nmpe)
90{
91 if_clone_attach(&mpe_cloner);
92}
93
94int
95mpe_clone_create(struct if_clone *ifc, int unit)
96{
97 struct mpe_softc *sc;
98 struct ifnet *ifp;
99
100 sc = malloc(sizeof(*sc), M_DEVBUF2, M_WAITOK0x0001|M_CANFAIL0x0004|M_ZERO0x0008);
101 if (sc == NULL((void *)0))
102 return (ENOMEM12);
103
104 ifp = &sc->sc_if;
105 snprintf(ifp->if_xname, sizeof ifp->if_xname, "mpe%d", unit);
106 ifp->if_flags = IFF_POINTOPOINT0x10;
107 ifp->if_xflags = IFXF_CLONED0x2;
108 ifp->if_softc = sc;
109 ifp->if_mtuif_data.ifi_mtu = MPE_MTU1500;
110 ifp->if_ioctl = mpe_ioctl;
111 ifp->if_bpf_mtap = p2p_bpf_mtap;
112 ifp->if_input = p2p_input;
113 ifp->if_output = mpe_output;
114 ifp->if_start = mpe_start;
115 ifp->if_typeif_data.ifi_type = IFT_MPLS0xa6;
116 ifp->if_hdrlenif_data.ifi_hdrlen = MPE_HDRLENsizeof(struct shim_hdr);
117
118 sc->sc_dead = 0;
119
120 if_counters_alloc(ifp);
121 if_attach(ifp);
122 if_alloc_sadl(ifp);
123
124#if NBPFILTER1 > 0
125 bpfattach(&ifp->if_bpf, ifp, DLT_LOOP12, sizeof(u_int32_t));
126#endif
127
128 sc->sc_txhprio = 0;
129 sc->sc_rxhprio = IF_HDRPRIO_PACKET-1;
130 sc->sc_rdomain = 0;
131 refcnt_init_trace(&sc->sc_ifa.ifa_refcnt, DT_REFCNT_IDX_IFADDR2);
132 sc->sc_ifa.ifa_ifp = ifp;
133 sc->sc_ifa.ifa_addr = sdltosa(ifp->if_sadl);
134 sc->sc_smpls.smpls_len = sizeof(sc->sc_smpls);
135 sc->sc_smpls.smpls_family = AF_MPLS33;
136
137 return (0);
138}
139
140int
141mpe_clone_destroy(struct ifnet *ifp)
142{
143 struct mpe_softc *sc = ifp->if_softc;
144
145 NET_LOCK()do { rw_enter_write(&netlock); } while (0);
146 CLR(ifp->if_flags, IFF_RUNNING)((ifp->if_flags) &= ~(0x40));
147 sc->sc_dead = 1;
148
149 if (sc->sc_smpls.smpls_label) {
150 rt_ifa_del(&sc->sc_ifa, RTF_MPLS0x100000|RTF_LOCAL0x200000,
151 smplstosa(&sc->sc_smpls)((struct sockaddr *)(&sc->sc_smpls)), sc->sc_rdomain);
152 }
153 NET_UNLOCK()do { rw_exit_write(&netlock); } while (0);
154
155 ifq_barrier(&ifp->if_snd);
156
157 if_detach(ifp);
158 if (refcnt_rele(&sc->sc_ifa.ifa_refcnt) == 0) {
159 panic("%s: ifa refcnt has %u refs", __func__,
160 sc->sc_ifa.ifa_refcnt.r_refs);
161 }
162 free(sc, M_DEVBUF2, sizeof *sc);
163 return (0);
164}
165
166/*
167 * Start output on the mpe interface.
168 */
169void
170mpe_start(struct ifnet *ifp)
171{
172 struct mpe_softc *sc = ifp->if_softc;
173 struct mbuf *m;
174 struct sockaddr *sa;
175 struct sockaddr smpls = { .sa_family = AF_MPLS33 };
176 struct rtentry *rt;
177 struct ifnet *ifp0;
178
179 while ((m = ifq_dequeue(&ifp->if_snd)) != NULL((void *)0)) {
180 sa = mtod(m, struct sockaddr *)((struct sockaddr *)((m)->m_hdr.mh_data));
181 rt = rtalloc(sa, RT_RESOLVE1, sc->sc_rdomain);
182 if (!rtisvalid(rt)) {
183 m_freem(m);
184 rtfree(rt);
185 continue;
186 }
187
188 ifp0 = if_get(rt->rt_ifidx);
189 if (ifp0 == NULL((void *)0)) {
190 m_freem(m);
191 rtfree(rt);
192 continue;
193 }
194
195 m_adj(m, sa->sa_len);
196
197#if NBPFILTER1 > 0
198 if (ifp->if_bpf) {
199 /* remove MPLS label before passing packet to bpf */
200 m->m_datam_hdr.mh_data += sizeof(struct shim_hdr);
201 m->m_lenm_hdr.mh_len -= sizeof(struct shim_hdr);
202 m->m_pkthdrM_dat.MH.MH_pkthdr.len -= sizeof(struct shim_hdr);
203 bpf_mtap_af(ifp->if_bpf, m->m_pkthdrM_dat.MH.MH_pkthdr.ph_family,
204 m, BPF_DIRECTION_OUT(1 << 1));
205 m->m_datam_hdr.mh_data -= sizeof(struct shim_hdr);
206 m->m_lenm_hdr.mh_len += sizeof(struct shim_hdr);
207 m->m_pkthdrM_dat.MH.MH_pkthdr.len += sizeof(struct shim_hdr);
208 }
209#endif
210
211 m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid = sc->sc_rdomain;
212 CLR(m->m_flags, M_BCAST|M_MCAST)((m->m_hdr.mh_flags) &= ~(0x0100|0x0200));
213
214 mpls_output(ifp0, m, &smpls, rt);
215 if_put(ifp0);
216 rtfree(rt);
217 }
218}
219
220int
221mpe_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
222 struct rtentry *rt)
223{
224 struct mpe_softc *sc;
225 struct rt_mpls *rtmpls;
226 struct shim_hdr shim;
227 int error;
228 int txprio;
229 uint8_t ttl = mpls_defttl;
230 uint8_t tos, prio;
231 size_t ttloff;
232 socklen_t slen;
233
234 if (!rtisvalid(rt) || !ISSET(rt->rt_flags, RTF_MPLS)((rt->rt_flags) & (0x100000))) {
235 m_freem(m);
236 return (ENETUNREACH51);
237 }
238
239 if (dst->sa_family == AF_LINK18 && ISSET(rt->rt_flags, RTF_LOCAL)((rt->rt_flags) & (0x200000))) {
240 mpe_input(ifp, m);
241 return (0);
242 }
243
244#ifdef DIAGNOSTIC1
245 if (ifp->if_rdomainif_data.ifi_rdomain != rtable_l2(m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid)) {
246 printf("%s: trying to send packet on wrong domain. "
247 "if %d vs. mbuf %d\n", ifp->if_xname,
248 ifp->if_rdomainif_data.ifi_rdomain, rtable_l2(m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid));
249 }
250#endif
251
252 rtmpls = (struct rt_mpls *)rt->rt_llinfo;
253 if (rtmpls->mpls_operation != MPLS_OP_PUSH0x2) {
254 m_freem(m);
255 return (ENETUNREACH51);
256 }
257
258 error = 0;
Value stored to 'error' is never read
259 switch (dst->sa_family) {
260 case AF_INET2: {
261 struct ip *ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data));
262 tos = ip->ip_tos;
263 ttloff = offsetof(struct ip, ip_ttl)__builtin_offsetof(struct ip, ip_ttl);
264 slen = sizeof(struct sockaddr_in);
265 break;
266 }
267#ifdef INET61
268 case AF_INET624: {
269 struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data));
270 uint32_t flow = bemtoh32(&ip6->ip6_flow)(__uint32_t)(__builtin_constant_p(*(__uint32_t *)(&ip6->
ip6_ctlun.ip6_un1.ip6_un1_flow)) ? (__uint32_t)(((__uint32_t)
(*(__uint32_t *)(&ip6->ip6_ctlun.ip6_un1.ip6_un1_flow)
) & 0xff) << 24 | ((__uint32_t)(*(__uint32_t *)(&
ip6->ip6_ctlun.ip6_un1.ip6_un1_flow)) & 0xff00) <<
8 | ((__uint32_t)(*(__uint32_t *)(&ip6->ip6_ctlun.ip6_un1
.ip6_un1_flow)) & 0xff0000) >> 8 | ((__uint32_t)(*(
__uint32_t *)(&ip6->ip6_ctlun.ip6_un1.ip6_un1_flow)) &
0xff000000) >> 24) : __swap32md(*(__uint32_t *)(&ip6
->ip6_ctlun.ip6_un1.ip6_un1_flow)));
271 tos = flow >> 20;
272 ttloff = offsetof(struct ip6_hdr, ip6_hlim)__builtin_offsetof(struct ip6_hdr, ip6_ctlun.ip6_un1.ip6_un1_hlim
);
273 slen = sizeof(struct sockaddr_in6);
274 break;
275 }
276#endif
277 default:
278 m_freem(m);
279 return (EPFNOSUPPORT46);
280 }
281
282 if (mpls_mapttl_ip) {
283 /* assumes the ip header is already contig */
284 ttl = *(mtod(m, uint8_t *)((uint8_t *)((m)->m_hdr.mh_data)) + ttloff);
285 }
286
287 sc = ifp->if_softc;
288 txprio = sc->sc_txhprio;
289
290 switch (txprio) {
291 case IF_HDRPRIO_PACKET-1:
292 prio = m->m_pkthdrM_dat.MH.MH_pkthdr.pf.prio;
293 break;
294 case IF_HDRPRIO_PAYLOAD-2:
295 prio = IFQ_TOS2PRIO(tos)((tos) >> 5);
296 break;
297 default:
298 prio = txprio;
299 break;
300 }
301
302 shim.shim_label = rtmpls->mpls_label | htonl(prio << MPLS_EXP_OFFSET)(__uint32_t)(__builtin_constant_p(prio << 9) ? (__uint32_t
)(((__uint32_t)(prio << 9) & 0xff) << 24 | ((
__uint32_t)(prio << 9) & 0xff00) << 8 | ((__uint32_t
)(prio << 9) & 0xff0000) >> 8 | ((__uint32_t)
(prio << 9) & 0xff000000) >> 24) : __swap32md
(prio << 9)) |
303 MPLS_BOS_MASK((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t)(0x00000100U
)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000100U)) &
0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000100U)) &
0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000100U))
& 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000100U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000100U
)))) | htonl(ttl)(__uint32_t)(__builtin_constant_p(ttl) ? (__uint32_t)(((__uint32_t
)(ttl) & 0xff) << 24 | ((__uint32_t)(ttl) & 0xff00
) << 8 | ((__uint32_t)(ttl) & 0xff0000) >> 8 |
((__uint32_t)(ttl) & 0xff000000) >> 24) : __swap32md
(ttl));
304
305 m = m_prepend(m, sizeof(shim), M_NOWAIT0x0002);
306 if (m == NULL((void *)0)) {
307 error = ENOMEM12;
308 goto out;
309 }
310 *mtod(m, struct shim_hdr *)((struct shim_hdr *)((m)->m_hdr.mh_data)) = shim;
311
312 m = m_prepend(m, slen, M_WAITOK0x0001);
313 if (m == NULL((void *)0)) {
314 error = ENOMEM12;
315 goto out;
316 }
317 memcpy(mtod(m, struct sockaddr *), rt->rt_gateway, slen)__builtin_memcpy((((struct sockaddr *)((m)->m_hdr.mh_data)
)), (rt->rt_gateway), (slen));
318 mtod(m, struct sockaddr *)((struct sockaddr *)((m)->m_hdr.mh_data))->sa_len = slen; /* to be sure */
319
320 m->m_pkthdrM_dat.MH.MH_pkthdr.ph_family = dst->sa_family;
321
322 error = if_enqueue(ifp, m);
323out:
324 if (error)
325 ifp->if_oerrorsif_data.ifi_oerrors++;
326 return (error);
327}
328
329int
330mpe_set_label(struct mpe_softc *sc, uint32_t label, unsigned int rdomain)
331{
332 int error;
333
334 if (sc->sc_dead)
335 return (ENXIO6);
336
337 if (sc->sc_smpls.smpls_label) {
338 /* remove old MPLS route */
339 rt_ifa_del(&sc->sc_ifa, RTF_MPLS0x100000|RTF_LOCAL0x200000,
340 smplstosa(&sc->sc_smpls)((struct sockaddr *)(&sc->sc_smpls)), sc->sc_rdomain);
341 }
342
343 /* add new MPLS route */
344 sc->sc_smpls.smpls_label = label;
345 sc->sc_rdomain = rdomain;
346
347 /* only install with a label or mpe_clone_destroy() will ignore it */
348 if (sc->sc_smpls.smpls_label == MPLS_LABEL2SHIM(0)((__uint32_t)(__builtin_constant_p((0) << 12) ? (__uint32_t
)(((__uint32_t)((0) << 12) & 0xff) << 24 | ((
__uint32_t)((0) << 12) & 0xff00) << 8 | ((__uint32_t
)((0) << 12) & 0xff0000) >> 8 | ((__uint32_t)
((0) << 12) & 0xff000000) >> 24) : __swap32md
((0) << 12))))
349 return 0;
350
351 error = rt_ifa_add(&sc->sc_ifa, RTF_MPLS0x100000|RTF_LOCAL0x200000,
352 smplstosa(&sc->sc_smpls)((struct sockaddr *)(&sc->sc_smpls)), sc->sc_rdomain);
353 if (error)
354 sc->sc_smpls.smpls_label = 0;
355
356 return (error);
357}
358
359int
360mpe_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
361{
362 struct mpe_softc *sc = ifp->if_softc;
363 struct ifreq *ifr;
364 struct shim_hdr shim;
365 int error = 0;
366
367 ifr = (struct ifreq *)data;
368 switch (cmd) {
369 case SIOCSIFADDR((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((12))):
370 break;
371 case SIOCSIFFLAGS((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((16))):
372 if (ifp->if_flags & IFF_UP0x1)
373 ifp->if_flags |= IFF_RUNNING0x40;
374 else
375 ifp->if_flags &= ~IFF_RUNNING0x40;
376 break;
377 case SIOCSIFMTU((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((127))):
378 if (ifr->ifr_mtuifr_ifru.ifru_metric < MPE_MTU_MIN256 ||
379 ifr->ifr_mtuifr_ifru.ifru_metric > MPE_MTU_MAX8192)
380 error = EINVAL22;
381 else
382 ifp->if_mtuif_data.ifi_mtu = ifr->ifr_mtuifr_ifru.ifru_metric;
383 break;
384 case SIOCGETLABEL((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((154))):
385 shim.shim_label = MPLS_SHIM2LABEL(sc->sc_smpls.smpls_label)((__uint32_t)(__builtin_constant_p((sc->sc_smpls.smpls_label
)) ? (__uint32_t)(((__uint32_t)((sc->sc_smpls.smpls_label)
) & 0xff) << 24 | ((__uint32_t)((sc->sc_smpls.smpls_label
)) & 0xff00) << 8 | ((__uint32_t)((sc->sc_smpls.
smpls_label)) & 0xff0000) >> 8 | ((__uint32_t)((sc->
sc_smpls.smpls_label)) & 0xff000000) >> 24) : __swap32md
((sc->sc_smpls.smpls_label))) >> 12);
386 if (shim.shim_label == 0) {
387 error = EADDRNOTAVAIL49;
388 break;
389 }
390 error = copyout(&shim, ifr->ifr_dataifr_ifru.ifru_data, sizeof(shim));
391 break;
392 case SIOCSETLABEL((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((153))):
393 error = copyin(ifr->ifr_dataifr_ifru.ifru_data, &shim, sizeof(shim));
394 if (error != 0)
395 break;
396 if (shim.shim_label > MPLS_LABEL_MAX((1 << 20) - 1) ||
397 shim.shim_label <= MPLS_LABEL_RESERVED_MAX15) {
398 error = EINVAL22;
399 break;
400 }
401 shim.shim_label = MPLS_LABEL2SHIM(shim.shim_label)((__uint32_t)(__builtin_constant_p((shim.shim_label) <<
12) ? (__uint32_t)(((__uint32_t)((shim.shim_label) << 12
) & 0xff) << 24 | ((__uint32_t)((shim.shim_label) <<
12) & 0xff00) << 8 | ((__uint32_t)((shim.shim_label
) << 12) & 0xff0000) >> 8 | ((__uint32_t)((shim
.shim_label) << 12) & 0xff000000) >> 24) : __swap32md
((shim.shim_label) << 12)));
402 if (sc->sc_smpls.smpls_label != shim.shim_label) {
403 error = mpe_set_label(sc, shim.shim_label,
404 sc->sc_rdomain);
405 }
406 break;
407 case SIOCDELLABEL((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((151))):
408 if (sc->sc_smpls.smpls_label != MPLS_LABEL2SHIM(0)((__uint32_t)(__builtin_constant_p((0) << 12) ? (__uint32_t
)(((__uint32_t)((0) << 12) & 0xff) << 24 | ((
__uint32_t)((0) << 12) & 0xff00) << 8 | ((__uint32_t
)((0) << 12) & 0xff0000) >> 8 | ((__uint32_t)
((0) << 12) & 0xff000000) >> 24) : __swap32md
((0) << 12)))) {
409 rt_ifa_del(&sc->sc_ifa, RTF_MPLS0x100000|RTF_LOCAL0x200000,
410 smplstosa(&sc->sc_smpls)((struct sockaddr *)(&sc->sc_smpls)), sc->sc_rdomain);
411 }
412 sc->sc_smpls.smpls_label = MPLS_LABEL2SHIM(0)((__uint32_t)(__builtin_constant_p((0) << 12) ? (__uint32_t
)(((__uint32_t)((0) << 12) & 0xff) << 24 | ((
__uint32_t)((0) << 12) & 0xff00) << 8 | ((__uint32_t
)((0) << 12) & 0xff0000) >> 8 | ((__uint32_t)
((0) << 12) & 0xff000000) >> 24) : __swap32md
((0) << 12)));
413 break;
414
415 case SIOCSLIFPHYRTABLE((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((161))):
416 if (ifr->ifr_rdomainidifr_ifru.ifru_metric < 0 ||
417 ifr->ifr_rdomainidifr_ifru.ifru_metric > RT_TABLEID_MAX255 ||
418 !rtable_exists(ifr->ifr_rdomainidifr_ifru.ifru_metric) ||
419 ifr->ifr_rdomainidifr_ifru.ifru_metric != rtable_l2(ifr->ifr_rdomainidifr_ifru.ifru_metric)) {
420 error = EINVAL22;
421 break;
422 }
423 if (sc->sc_rdomain != ifr->ifr_rdomainidifr_ifru.ifru_metric) {
424 error = mpe_set_label(sc, sc->sc_smpls.smpls_label,
425 ifr->ifr_rdomainidifr_ifru.ifru_metric);
426 }
427 break;
428 case SIOCGLIFPHYRTABLE(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof
(struct ifreq) & 0x1fff) << 16) | ((('i')) <<
8) | ((162))):
429 ifr->ifr_rdomainidifr_ifru.ifru_metric = sc->sc_rdomain;
430 break;
431
432 case SIOCSTXHPRIO((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((197))):
433 error = if_txhprio_l3_check(ifr->ifr_hdrprioifr_ifru.ifru_metric);
434 if (error != 0)
435 break;
436
437 sc->sc_txhprio = ifr->ifr_hdrprioifr_ifru.ifru_metric;
438 break;
439 case SIOCGTXHPRIO(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof
(struct ifreq) & 0x1fff) << 16) | ((('i')) <<
8) | ((198))):
440 ifr->ifr_hdrprioifr_ifru.ifru_metric = sc->sc_txhprio;
441 break;
442
443 case SIOCSRXHPRIO((unsigned long)0x80000000 | ((sizeof(struct ifreq) & 0x1fff
) << 16) | ((('i')) << 8) | ((219))):
444 error = if_rxhprio_l3_check(ifr->ifr_hdrprioifr_ifru.ifru_metric);
445 if (error != 0)
446 break;
447
448 sc->sc_rxhprio = ifr->ifr_hdrprioifr_ifru.ifru_metric;
449 break;
450 case SIOCGRXHPRIO(((unsigned long)0x80000000|(unsigned long)0x40000000) | ((sizeof
(struct ifreq) & 0x1fff) << 16) | ((('i')) <<
8) | ((219))):
451 ifr->ifr_hdrprioifr_ifru.ifru_metric = sc->sc_rxhprio;
452 break;
453
454 default:
455 return (ENOTTY25);
456 }
457
458 return (error);
459}
460
461void
462mpe_input(struct ifnet *ifp, struct mbuf *m)
463{
464 struct mpe_softc *sc = ifp->if_softc;
465 struct shim_hdr *shim;
466 struct mbuf *n;
467 uint8_t ttl, tos;
468 uint32_t exp;
469 int rxprio = sc->sc_rxhprio;
470
471 shim = mtod(m, struct shim_hdr *)((struct shim_hdr *)((m)->m_hdr.mh_data));
472 exp = ntohl(shim->shim_label & MPLS_EXP_MASK)(__uint32_t)(__builtin_constant_p(shim->shim_label & (
(u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t)(0x00000e00U
)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000e00U)) &
0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000e00U)) &
0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000e00U))
& 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000e00U
))))) ? (__uint32_t)(((__uint32_t)(shim->shim_label & (
(u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t)(0x00000e00U
)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000e00U)) &
0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000e00U)) &
0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000e00U))
& 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000e00U
))))) & 0xff) << 24 | ((__uint32_t)(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x00000e00U)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000e00U
))))) & 0xff00) << 8 | ((__uint32_t)(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x00000e00U)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000e00U
))))) & 0xff0000) >> 8 | ((__uint32_t)(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x00000e00U)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000e00U
))))) & 0xff000000) >> 24) : __swap32md(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x00000e00U)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000e00U
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000e00U
)))))) >> MPLS_EXP_OFFSET9;
473 if (!MPLS_BOS_ISSET(shim->shim_label)(((shim->shim_label) & ((u_int32_t)(__uint32_t)(__builtin_constant_p
((u_int32_t)(0x00000100U)) ? (__uint32_t)(((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff) << 24 | ((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff000000) >> 24) : __swap32md((
u_int32_t)(0x00000100U))))) == ((u_int32_t)(__uint32_t)(__builtin_constant_p
((u_int32_t)(0x00000100U)) ? (__uint32_t)(((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff) << 24 | ((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t
)(0x00000100U)) & 0xff000000) >> 24) : __swap32md((
u_int32_t)(0x00000100U))))))
474 goto drop;
475
476 ttl = ntohl(shim->shim_label & MPLS_TTL_MASK)(__uint32_t)(__builtin_constant_p(shim->shim_label & (
(u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t)(0x000000ffU
)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ffU)) &
0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ffU)) &
0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ffU))
& 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ffU
))))) ? (__uint32_t)(((__uint32_t)(shim->shim_label & (
(u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t)(0x000000ffU
)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ffU)) &
0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ffU)) &
0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ffU))
& 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ffU
))))) & 0xff) << 24 | ((__uint32_t)(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x000000ffU)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ffU
))))) & 0xff00) << 8 | ((__uint32_t)(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x000000ffU)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ffU
))))) & 0xff0000) >> 8 | ((__uint32_t)(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x000000ffU)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ffU
))))) & 0xff000000) >> 24) : __swap32md(shim->shim_label
& ((u_int32_t)(__uint32_t)(__builtin_constant_p((u_int32_t
)(0x000000ffU)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ffU
)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ffU
))))));
477 m_adj(m, sizeof(*shim));
478
479 n = m;
480 while (n->m_lenm_hdr.mh_len == 0) {
481 n = n->m_nextm_hdr.mh_next;
482 if (n == NULL((void *)0))
483 goto drop;
484 }
485
486 switch (*mtod(n, uint8_t *)((uint8_t *)((n)->m_hdr.mh_data)) >> 4) {
487 case 4: {
488 struct ip *ip;
489 if (m->m_lenm_hdr.mh_len < sizeof(*ip)) {
490 m = m_pullup(m, sizeof(*ip));
491 if (m == NULL((void *)0))
492 return;
493 }
494 ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data));
495 tos = ip->ip_tos;
496
497 if (mpls_mapttl_ip) {
498 m = mpls_ip_adjttl(m, ttl);
499 if (m == NULL((void *)0))
500 return;
501 }
502
503 m->m_pkthdrM_dat.MH.MH_pkthdr.ph_family = AF_INET2;
504 break;
505 }
506#ifdef INET61
507 case 6: {
508 struct ip6_hdr *ip6;
509 uint32_t flow;
510 if (m->m_lenm_hdr.mh_len < sizeof(*ip6)) {
511 m = m_pullup(m, sizeof(*ip6));
512 if (m == NULL((void *)0))
513 return;
514 }
515 ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data));
516 flow = bemtoh32(&ip6->ip6_flow)(__uint32_t)(__builtin_constant_p(*(__uint32_t *)(&ip6->
ip6_ctlun.ip6_un1.ip6_un1_flow)) ? (__uint32_t)(((__uint32_t)
(*(__uint32_t *)(&ip6->ip6_ctlun.ip6_un1.ip6_un1_flow)
) & 0xff) << 24 | ((__uint32_t)(*(__uint32_t *)(&
ip6->ip6_ctlun.ip6_un1.ip6_un1_flow)) & 0xff00) <<
8 | ((__uint32_t)(*(__uint32_t *)(&ip6->ip6_ctlun.ip6_un1
.ip6_un1_flow)) & 0xff0000) >> 8 | ((__uint32_t)(*(
__uint32_t *)(&ip6->ip6_ctlun.ip6_un1.ip6_un1_flow)) &
0xff000000) >> 24) : __swap32md(*(__uint32_t *)(&ip6
->ip6_ctlun.ip6_un1.ip6_un1_flow)));
517 tos = flow >> 20;
518
519 if (mpls_mapttl_ip6) {
520 m = mpls_ip6_adjttl(m, ttl);
521 if (m == NULL((void *)0))
522 return;
523 }
524
525 m->m_pkthdrM_dat.MH.MH_pkthdr.ph_family = AF_INET624;
526 break;
527 }
528#endif /* INET6 */
529 default:
530 goto drop;
531 }
532
533 switch (rxprio) {
534 case IF_HDRPRIO_PACKET-1:
535 /* nop */
536 break;
537 case IF_HDRPRIO_OUTER-3:
538 m->m_pkthdrM_dat.MH.MH_pkthdr.pf.prio = exp;
539 break;
540 case IF_HDRPRIO_PAYLOAD-2:
541 m->m_pkthdrM_dat.MH.MH_pkthdr.pf.prio = IFQ_TOS2PRIO(tos)((tos) >> 5);
542 break;
543 default:
544 m->m_pkthdrM_dat.MH.MH_pkthdr.pf.prio = rxprio;
545 break;
546 }
547
548 if_vinput(ifp, m);
549 return;
550drop:
551 m_freem(m);
552}