2 * Copyright (c) 2015 Dmitry Chagin
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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <opt_inet6.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/ctype.h>
37 #include <sys/malloc.h>
38 #include <sys/signalvar.h>
39 #include <sys/socket.h>
40 #include <sys/socketvar.h>
43 #include <net/if_var.h>
44 #include <net/if_dl.h>
45 #include <net/if_types.h>
48 #include <netinet/in.h>
50 #include <compat/linux/linux.h>
51 #include <compat/linux/linux_common.h>
52 #include <compat/linux/linux_util.h>
54 CTASSERT(LINUX_IFNAMSIZ == IFNAMSIZ);
56 static int bsd_to_linux_sigtbl[LINUX_SIGTBLSZ] = {
57 LINUX_SIGHUP, /* SIGHUP */
58 LINUX_SIGINT, /* SIGINT */
59 LINUX_SIGQUIT, /* SIGQUIT */
60 LINUX_SIGILL, /* SIGILL */
61 LINUX_SIGTRAP, /* SIGTRAP */
62 LINUX_SIGABRT, /* SIGABRT */
64 LINUX_SIGFPE, /* SIGFPE */
65 LINUX_SIGKILL, /* SIGKILL */
66 LINUX_SIGBUS, /* SIGBUS */
67 LINUX_SIGSEGV, /* SIGSEGV */
68 LINUX_SIGSYS, /* SIGSYS */
69 LINUX_SIGPIPE, /* SIGPIPE */
70 LINUX_SIGALRM, /* SIGALRM */
71 LINUX_SIGTERM, /* SIGTERM */
72 LINUX_SIGURG, /* SIGURG */
73 LINUX_SIGSTOP, /* SIGSTOP */
74 LINUX_SIGTSTP, /* SIGTSTP */
75 LINUX_SIGCONT, /* SIGCONT */
76 LINUX_SIGCHLD, /* SIGCHLD */
77 LINUX_SIGTTIN, /* SIGTTIN */
78 LINUX_SIGTTOU, /* SIGTTOU */
79 LINUX_SIGIO, /* SIGIO */
80 LINUX_SIGXCPU, /* SIGXCPU */
81 LINUX_SIGXFSZ, /* SIGXFSZ */
82 LINUX_SIGVTALRM,/* SIGVTALRM */
83 LINUX_SIGPROF, /* SIGPROF */
84 LINUX_SIGWINCH, /* SIGWINCH */
86 LINUX_SIGUSR1, /* SIGUSR1 */
87 LINUX_SIGUSR2 /* SIGUSR2 */
90 static int linux_to_bsd_sigtbl[LINUX_SIGTBLSZ] = {
91 SIGHUP, /* LINUX_SIGHUP */
92 SIGINT, /* LINUX_SIGINT */
93 SIGQUIT, /* LINUX_SIGQUIT */
94 SIGILL, /* LINUX_SIGILL */
95 SIGTRAP, /* LINUX_SIGTRAP */
96 SIGABRT, /* LINUX_SIGABRT */
97 SIGBUS, /* LINUX_SIGBUS */
98 SIGFPE, /* LINUX_SIGFPE */
99 SIGKILL, /* LINUX_SIGKILL */
100 SIGUSR1, /* LINUX_SIGUSR1 */
101 SIGSEGV, /* LINUX_SIGSEGV */
102 SIGUSR2, /* LINUX_SIGUSR2 */
103 SIGPIPE, /* LINUX_SIGPIPE */
104 SIGALRM, /* LINUX_SIGALRM */
105 SIGTERM, /* LINUX_SIGTERM */
106 SIGBUS, /* LINUX_SIGSTKFLT */
107 SIGCHLD, /* LINUX_SIGCHLD */
108 SIGCONT, /* LINUX_SIGCONT */
109 SIGSTOP, /* LINUX_SIGSTOP */
110 SIGTSTP, /* LINUX_SIGTSTP */
111 SIGTTIN, /* LINUX_SIGTTIN */
112 SIGTTOU, /* LINUX_SIGTTOU */
113 SIGURG, /* LINUX_SIGURG */
114 SIGXCPU, /* LINUX_SIGXCPU */
115 SIGXFSZ, /* LINUX_SIGXFSZ */
116 SIGVTALRM, /* LINUX_SIGVTALARM */
117 SIGPROF, /* LINUX_SIGPROF */
118 SIGWINCH, /* LINUX_SIGWINCH */
119 SIGIO, /* LINUX_SIGIO */
121 * FreeBSD does not have SIGPWR signal, map Linux SIGPWR signal
122 * to the first unused FreeBSD signal number. Since Linux supports
123 * signals from 1 to 64 we are ok here as our SIGRTMIN = 65.
125 SIGRTMIN, /* LINUX_SIGPWR */
126 SIGSYS /* LINUX_SIGSYS */
130 * Map Linux RT signals to the FreeBSD RT signals.
133 linux_to_bsd_rt_signal(int sig)
136 return (SIGRTMIN + 1 + sig - LINUX_SIGRTMIN);
140 bsd_to_linux_rt_signal(int sig)
143 return (sig - SIGRTMIN - 1 + LINUX_SIGRTMIN);
147 linux_to_bsd_signal(int sig)
150 KASSERT(sig > 0 && sig <= LINUX_SIGRTMAX, ("invalid Linux signal %d\n", sig));
152 if (sig < LINUX_SIGRTMIN)
153 return (linux_to_bsd_sigtbl[_SIG_IDX(sig)]);
155 return (linux_to_bsd_rt_signal(sig));
159 bsd_to_linux_signal(int sig)
162 if (sig <= LINUX_SIGTBLSZ)
163 return (bsd_to_linux_sigtbl[_SIG_IDX(sig)]);
165 return (LINUX_SIGPWR);
167 return (bsd_to_linux_rt_signal(sig));
171 linux_to_bsd_sigaltstack(int lsa)
175 if (lsa & LINUX_SS_DISABLE)
178 * Linux ignores SS_ONSTACK flag for ss
179 * parameter while FreeBSD prohibits it.
185 bsd_to_linux_sigaltstack(int bsa)
189 if (bsa & SS_DISABLE)
190 lsa |= LINUX_SS_DISABLE;
191 if (bsa & SS_ONSTACK)
192 lsa |= LINUX_SS_ONSTACK;
197 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
202 for (l = 1; l <= LINUX_SIGRTMAX; l++) {
203 if (LINUX_SIGISMEMBER(*lss, l)) {
204 b = linux_to_bsd_signal(l);
212 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
216 LINUX_SIGEMPTYSET(*lss);
217 for (b = 1; b <= SIGRTMAX; b++) {
218 if (SIGISMEMBER(*bss, b)) {
219 l = bsd_to_linux_signal(b);
221 LINUX_SIGADDSET(*lss, l);
227 * Translate a Linux interface name to a FreeBSD interface name,
228 * and return the associated ifnet structure
229 * bsdname and lxname need to be least IFNAMSIZ bytes long, but
230 * can point to the same buffer.
233 ifname_linux_to_bsd(struct thread *td, const char *lxname, char *bsdname)
241 for (len = 0; len < LINUX_IFNAMSIZ; ++len)
242 if (!isalpha(lxname[len]) || lxname[len] == '\0')
244 if (len == 0 || len == LINUX_IFNAMSIZ)
246 /* Linux loopback interface name is lo (not lo0) */
247 is_lo = (len == 2 && strncmp(lxname, "lo", len) == 0);
248 unit = (int)strtoul(lxname + len, &ep, 10);
249 if ((ep == NULL || ep == lxname + len || ep >= lxname + LINUX_IFNAMSIZ) &&
253 is_eth = (len == 3 && strncmp(lxname, "eth", len) == 0);
255 CURVNET_SET(TD_TO_VNET(td));
257 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
259 * Allow Linux programs to use FreeBSD names. Don't presume
260 * we never have an interface named "eth", so don't make
261 * the test optional based on is_eth.
263 if (strncmp(ifp->if_xname, lxname, LINUX_IFNAMSIZ) == 0)
265 if (is_eth && IFP_IS_ETH(ifp) && unit == index++)
267 if (is_lo && IFP_IS_LOOP(ifp))
272 if (ifp != NULL && bsdname != NULL)
273 strlcpy(bsdname, ifp->if_xname, IFNAMSIZ);
278 linux_ifflags(struct ifnet *ifp, short *flags)
282 fl = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
285 *flags |= LINUX_IFF_UP;
286 if (fl & IFF_BROADCAST)
287 *flags |= LINUX_IFF_BROADCAST;
289 *flags |= LINUX_IFF_DEBUG;
290 if (fl & IFF_LOOPBACK)
291 *flags |= LINUX_IFF_LOOPBACK;
292 if (fl & IFF_POINTOPOINT)
293 *flags |= LINUX_IFF_POINTOPOINT;
294 if (fl & IFF_DRV_RUNNING)
295 *flags |= LINUX_IFF_RUNNING;
297 *flags |= LINUX_IFF_NOARP;
298 if (fl & IFF_PROMISC)
299 *flags |= LINUX_IFF_PROMISC;
300 if (fl & IFF_ALLMULTI)
301 *flags |= LINUX_IFF_ALLMULTI;
302 if (fl & IFF_MULTICAST)
303 *flags |= LINUX_IFF_MULTICAST;
307 linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa)
310 struct sockaddr_dl *sdl;
312 if (IFP_IS_LOOP(ifp)) {
313 bzero(lsa, sizeof(*lsa));
314 lsa->sa_family = LINUX_ARPHRD_LOOPBACK;
318 if (!IFP_IS_ETH(ifp))
321 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
322 sdl = (struct sockaddr_dl*)ifa->ifa_addr;
323 if (sdl != NULL && (sdl->sdl_family == AF_LINK) &&
324 (sdl->sdl_type == IFT_ETHER)) {
325 bzero(lsa, sizeof(*lsa));
326 lsa->sa_family = LINUX_ARPHRD_ETHER;
327 bcopy(LLADDR(sdl), lsa->sa_data, LINUX_IFHWADDRLEN);
336 linux_to_bsd_domain(int domain)
340 case LINUX_AF_UNSPEC:
352 case LINUX_AF_APPLETALK:
353 return (AF_APPLETALK);
359 bsd_to_linux_domain(int domain)
364 return (LINUX_AF_UNSPEC);
366 return (LINUX_AF_UNIX);
368 return (LINUX_AF_INET);
370 return (LINUX_AF_INET6);
372 return (LINUX_AF_AX25);
374 return (LINUX_AF_IPX);
376 return (LINUX_AF_APPLETALK);
382 * Based on the fact that:
383 * 1. Native and Linux storage of struct sockaddr
384 * and struct sockaddr_in6 are equal.
385 * 2. On Linux sa_family is the first member of all struct sockaddr.
388 bsd_to_linux_sockaddr(const struct sockaddr *sa, struct l_sockaddr **lsa,
391 struct l_sockaddr *kosa;
395 if (len < 2 || len > UCHAR_MAX)
398 kosa = malloc(len, M_SONAME, M_WAITOK);
399 bcopy(sa, kosa, len);
401 bdom = bsd_to_linux_domain(sa->sa_family);
403 error = EAFNOSUPPORT;
407 kosa->sa_family = bdom;
412 free(kosa, M_SONAME);
417 linux_to_bsd_sockaddr(const struct l_sockaddr *osa, struct sockaddr **sap,
421 struct l_sockaddr *kosa;
423 struct sockaddr_in6 *sin6;
427 int salen, bdom, error, hdrlen, namelen;
429 if (*len < 2 || *len > UCHAR_MAX)
437 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
438 * if it's a v4-mapped address, so reserve the proper space
441 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
442 salen += sizeof(uint32_t);
447 kosa = malloc(salen, M_SONAME, M_WAITOK);
449 if ((error = copyin(osa, kosa, *len)))
452 bdom = linux_to_bsd_domain(kosa->sa_family);
454 error = EAFNOSUPPORT;
460 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
461 * which lacks the scope id compared with RFC2553 one. If we detect
462 * the situation, reject the address and write a message to system log.
464 * Still accept addresses for which the scope id is not used.
467 if (bdom == AF_INET6) {
468 sin6 = (struct sockaddr_in6 *)kosa;
469 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
470 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
471 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
472 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
473 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
474 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
475 sin6->sin6_scope_id = 0;
478 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
483 salen -= sizeof(uint32_t);
486 if (bdom == AF_INET) {
487 if (salen < sizeof(struct sockaddr_in)) {
491 salen = sizeof(struct sockaddr_in);
494 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
495 hdrlen = offsetof(struct sockaddr_un, sun_path);
496 name = ((struct sockaddr_un *)kosa)->sun_path;
499 * Linux abstract namespace starts with a NULL byte.
500 * XXX We do not support abstract namespace yet.
502 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
504 namelen = strnlen(name, salen - hdrlen);
505 salen = hdrlen + namelen;
506 if (salen > sizeof(struct sockaddr_un)) {
507 error = ENAMETOOLONG;
512 sa = (struct sockaddr *)kosa;
513 sa->sa_family = bdom;
521 free(kosa, M_SONAME);