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 struct futex_list futex_list;
55 struct mtx futex_mtx; /* protects the futex list */
57 CTASSERT(LINUX_IFNAMSIZ == IFNAMSIZ);
59 static int bsd_to_linux_sigtbl[LINUX_SIGTBLSZ] = {
60 LINUX_SIGHUP, /* SIGHUP */
61 LINUX_SIGINT, /* SIGINT */
62 LINUX_SIGQUIT, /* SIGQUIT */
63 LINUX_SIGILL, /* SIGILL */
64 LINUX_SIGTRAP, /* SIGTRAP */
65 LINUX_SIGABRT, /* SIGABRT */
67 LINUX_SIGFPE, /* SIGFPE */
68 LINUX_SIGKILL, /* SIGKILL */
69 LINUX_SIGBUS, /* SIGBUS */
70 LINUX_SIGSEGV, /* SIGSEGV */
71 LINUX_SIGSYS, /* SIGSYS */
72 LINUX_SIGPIPE, /* SIGPIPE */
73 LINUX_SIGALRM, /* SIGALRM */
74 LINUX_SIGTERM, /* SIGTERM */
75 LINUX_SIGURG, /* SIGURG */
76 LINUX_SIGSTOP, /* SIGSTOP */
77 LINUX_SIGTSTP, /* SIGTSTP */
78 LINUX_SIGCONT, /* SIGCONT */
79 LINUX_SIGCHLD, /* SIGCHLD */
80 LINUX_SIGTTIN, /* SIGTTIN */
81 LINUX_SIGTTOU, /* SIGTTOU */
82 LINUX_SIGIO, /* SIGIO */
83 LINUX_SIGXCPU, /* SIGXCPU */
84 LINUX_SIGXFSZ, /* SIGXFSZ */
85 LINUX_SIGVTALRM,/* SIGVTALRM */
86 LINUX_SIGPROF, /* SIGPROF */
87 LINUX_SIGWINCH, /* SIGWINCH */
89 LINUX_SIGUSR1, /* SIGUSR1 */
90 LINUX_SIGUSR2 /* SIGUSR2 */
93 static int linux_to_bsd_sigtbl[LINUX_SIGTBLSZ] = {
94 SIGHUP, /* LINUX_SIGHUP */
95 SIGINT, /* LINUX_SIGINT */
96 SIGQUIT, /* LINUX_SIGQUIT */
97 SIGILL, /* LINUX_SIGILL */
98 SIGTRAP, /* LINUX_SIGTRAP */
99 SIGABRT, /* LINUX_SIGABRT */
100 SIGBUS, /* LINUX_SIGBUS */
101 SIGFPE, /* LINUX_SIGFPE */
102 SIGKILL, /* LINUX_SIGKILL */
103 SIGUSR1, /* LINUX_SIGUSR1 */
104 SIGSEGV, /* LINUX_SIGSEGV */
105 SIGUSR2, /* LINUX_SIGUSR2 */
106 SIGPIPE, /* LINUX_SIGPIPE */
107 SIGALRM, /* LINUX_SIGALRM */
108 SIGTERM, /* LINUX_SIGTERM */
109 SIGBUS, /* LINUX_SIGSTKFLT */
110 SIGCHLD, /* LINUX_SIGCHLD */
111 SIGCONT, /* LINUX_SIGCONT */
112 SIGSTOP, /* LINUX_SIGSTOP */
113 SIGTSTP, /* LINUX_SIGTSTP */
114 SIGTTIN, /* LINUX_SIGTTIN */
115 SIGTTOU, /* LINUX_SIGTTOU */
116 SIGURG, /* LINUX_SIGURG */
117 SIGXCPU, /* LINUX_SIGXCPU */
118 SIGXFSZ, /* LINUX_SIGXFSZ */
119 SIGVTALRM, /* LINUX_SIGVTALARM */
120 SIGPROF, /* LINUX_SIGPROF */
121 SIGWINCH, /* LINUX_SIGWINCH */
122 SIGIO, /* LINUX_SIGIO */
124 * FreeBSD does not have SIGPWR signal, map Linux SIGPWR signal
125 * to the first unused FreeBSD signal number. Since Linux supports
126 * signals from 1 to 64 we are ok here as our SIGRTMIN = 65.
128 SIGRTMIN, /* LINUX_SIGPWR */
129 SIGSYS /* LINUX_SIGSYS */
133 * Map Linux RT signals to the FreeBSD RT signals.
136 linux_to_bsd_rt_signal(int sig)
139 return (SIGRTMIN + 1 + sig - LINUX_SIGRTMIN);
143 bsd_to_linux_rt_signal(int sig)
146 return (sig - SIGRTMIN - 1 + LINUX_SIGRTMIN);
150 linux_to_bsd_signal(int sig)
153 KASSERT(sig > 0 && sig <= LINUX_SIGRTMAX, ("invalid Linux signal %d\n", sig));
155 if (sig < LINUX_SIGRTMIN)
156 return (linux_to_bsd_sigtbl[_SIG_IDX(sig)]);
158 return (linux_to_bsd_rt_signal(sig));
162 bsd_to_linux_signal(int sig)
165 if (sig <= LINUX_SIGTBLSZ)
166 return (bsd_to_linux_sigtbl[_SIG_IDX(sig)]);
168 return (LINUX_SIGPWR);
170 return (bsd_to_linux_rt_signal(sig));
174 linux_to_bsd_sigaltstack(int lsa)
178 if (lsa & LINUX_SS_DISABLE)
181 * Linux ignores SS_ONSTACK flag for ss
182 * parameter while FreeBSD prohibits it.
188 bsd_to_linux_sigaltstack(int bsa)
192 if (bsa & SS_DISABLE)
193 lsa |= LINUX_SS_DISABLE;
194 if (bsa & SS_ONSTACK)
195 lsa |= LINUX_SS_ONSTACK;
200 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
205 for (l = 1; l <= LINUX_SIGRTMAX; l++) {
206 if (LINUX_SIGISMEMBER(*lss, l)) {
207 b = linux_to_bsd_signal(l);
215 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
219 LINUX_SIGEMPTYSET(*lss);
220 for (b = 1; b <= SIGRTMAX; b++) {
221 if (SIGISMEMBER(*bss, b)) {
222 l = bsd_to_linux_signal(b);
224 LINUX_SIGADDSET(*lss, l);
230 * Translate a Linux interface name to a FreeBSD interface name,
231 * and return the associated ifnet structure
232 * bsdname and lxname need to be least IFNAMSIZ bytes long, but
233 * can point to the same buffer.
236 ifname_linux_to_bsd(struct thread *td, const char *lxname, char *bsdname)
244 for (len = 0; len < LINUX_IFNAMSIZ; ++len)
245 if (!isalpha(lxname[len]) || lxname[len] == '\0')
247 if (len == 0 || len == LINUX_IFNAMSIZ)
249 /* Linux loopback interface name is lo (not lo0) */
250 is_lo = (len == 2 && strncmp(lxname, "lo", len) == 0);
251 unit = (int)strtoul(lxname + len, &ep, 10);
252 if ((ep == NULL || ep == lxname + len || ep >= lxname + LINUX_IFNAMSIZ) &&
256 is_eth = (len == 3 && strncmp(lxname, "eth", len) == 0);
258 CURVNET_SET(TD_TO_VNET(td));
260 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
262 * Allow Linux programs to use FreeBSD names. Don't presume
263 * we never have an interface named "eth", so don't make
264 * the test optional based on is_eth.
266 if (strncmp(ifp->if_xname, lxname, LINUX_IFNAMSIZ) == 0)
268 if (is_eth && IFP_IS_ETH(ifp) && unit == index++)
270 if (is_lo && IFP_IS_LOOP(ifp))
275 if (ifp != NULL && bsdname != NULL)
276 strlcpy(bsdname, ifp->if_xname, IFNAMSIZ);
281 linux_ifflags(struct ifnet *ifp, short *flags)
285 fl = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
288 *flags |= LINUX_IFF_UP;
289 if (fl & IFF_BROADCAST)
290 *flags |= LINUX_IFF_BROADCAST;
292 *flags |= LINUX_IFF_DEBUG;
293 if (fl & IFF_LOOPBACK)
294 *flags |= LINUX_IFF_LOOPBACK;
295 if (fl & IFF_POINTOPOINT)
296 *flags |= LINUX_IFF_POINTOPOINT;
297 if (fl & IFF_DRV_RUNNING)
298 *flags |= LINUX_IFF_RUNNING;
300 *flags |= LINUX_IFF_NOARP;
301 if (fl & IFF_PROMISC)
302 *flags |= LINUX_IFF_PROMISC;
303 if (fl & IFF_ALLMULTI)
304 *flags |= LINUX_IFF_ALLMULTI;
305 if (fl & IFF_MULTICAST)
306 *flags |= LINUX_IFF_MULTICAST;
310 linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa)
313 struct sockaddr_dl *sdl;
315 if (IFP_IS_LOOP(ifp)) {
316 bzero(lsa, sizeof(*lsa));
317 lsa->sa_family = LINUX_ARPHRD_LOOPBACK;
321 if (!IFP_IS_ETH(ifp))
324 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
325 sdl = (struct sockaddr_dl*)ifa->ifa_addr;
326 if (sdl != NULL && (sdl->sdl_family == AF_LINK) &&
327 (sdl->sdl_type == IFT_ETHER)) {
328 bzero(lsa, sizeof(*lsa));
329 lsa->sa_family = LINUX_ARPHRD_ETHER;
330 bcopy(LLADDR(sdl), lsa->sa_data, LINUX_IFHWADDRLEN);
339 linux_to_bsd_domain(int domain)
343 case LINUX_AF_UNSPEC:
355 case LINUX_AF_APPLETALK:
356 return (AF_APPLETALK);
362 bsd_to_linux_domain(int domain)
367 return (LINUX_AF_UNSPEC);
369 return (LINUX_AF_UNIX);
371 return (LINUX_AF_INET);
373 return (LINUX_AF_INET6);
375 return (LINUX_AF_AX25);
377 return (LINUX_AF_IPX);
379 return (LINUX_AF_APPLETALK);
385 * Based on the fact that:
386 * 1. Native and Linux storage of struct sockaddr
387 * and struct sockaddr_in6 are equal.
388 * 2. On Linux sa_family is the first member of all struct sockaddr.
391 bsd_to_linux_sockaddr(const struct sockaddr *sa, struct l_sockaddr **lsa,
394 struct l_sockaddr *kosa;
398 if (len < 2 || len > UCHAR_MAX)
401 kosa = malloc(len, M_SONAME, M_WAITOK);
402 bcopy(sa, kosa, len);
404 bdom = bsd_to_linux_domain(sa->sa_family);
406 error = EAFNOSUPPORT;
410 kosa->sa_family = bdom;
415 free(kosa, M_SONAME);
420 linux_to_bsd_sockaddr(const struct l_sockaddr *osa, struct sockaddr **sap,
424 struct l_sockaddr *kosa;
426 struct sockaddr_in6 *sin6;
430 int salen, bdom, error, hdrlen, namelen;
432 if (*len < 2 || *len > UCHAR_MAX)
440 * Check for old (pre-RFC2553) sockaddr_in6. We may accept it
441 * if it's a v4-mapped address, so reserve the proper space
444 if (salen == sizeof(struct sockaddr_in6) - sizeof(uint32_t)) {
445 salen += sizeof(uint32_t);
450 kosa = malloc(salen, M_SONAME, M_WAITOK);
452 if ((error = copyin(osa, kosa, *len)))
455 bdom = linux_to_bsd_domain(kosa->sa_family);
457 error = EAFNOSUPPORT;
463 * Older Linux IPv6 code uses obsolete RFC2133 struct sockaddr_in6,
464 * which lacks the scope id compared with RFC2553 one. If we detect
465 * the situation, reject the address and write a message to system log.
467 * Still accept addresses for which the scope id is not used.
470 if (bdom == AF_INET6) {
471 sin6 = (struct sockaddr_in6 *)kosa;
472 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) ||
473 (!IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
474 !IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
475 !IN6_IS_ADDR_V4COMPAT(&sin6->sin6_addr) &&
476 !IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) &&
477 !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))) {
478 sin6->sin6_scope_id = 0;
481 "obsolete pre-RFC2553 sockaddr_in6 rejected\n");
486 salen -= sizeof(uint32_t);
489 if (bdom == AF_INET) {
490 if (salen < sizeof(struct sockaddr_in)) {
494 salen = sizeof(struct sockaddr_in);
497 if (bdom == AF_LOCAL && salen > sizeof(struct sockaddr_un)) {
498 hdrlen = offsetof(struct sockaddr_un, sun_path);
499 name = ((struct sockaddr_un *)kosa)->sun_path;
502 * Linux abstract namespace starts with a NULL byte.
503 * XXX We do not support abstract namespace yet.
505 namelen = strnlen(name + 1, salen - hdrlen - 1) + 1;
507 namelen = strnlen(name, salen - hdrlen);
508 salen = hdrlen + namelen;
509 if (salen > sizeof(struct sockaddr_un)) {
510 error = ENAMETOOLONG;
515 sa = (struct sockaddr *)kosa;
516 sa->sa_family = bdom;
524 free(kosa, M_SONAME);