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/*-
* Copyright (c) 2015 Dmitry Chagin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ctype.h>
#include <sys/jail.h>
#include <sys/lock.h>
#include <sys/signalvar.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <compat/linux/linux.h>
#include <compat/linux/linux_common.h>
CTASSERT(LINUX_IFNAMSIZ == IFNAMSIZ);
static int bsd_to_linux_sigtbl[LINUX_SIGTBLSZ] = {
LINUX_SIGHUP, /* SIGHUP */
LINUX_SIGINT, /* SIGINT */
LINUX_SIGQUIT, /* SIGQUIT */
LINUX_SIGILL, /* SIGILL */
LINUX_SIGTRAP, /* SIGTRAP */
LINUX_SIGABRT, /* SIGABRT */
0, /* SIGEMT */
LINUX_SIGFPE, /* SIGFPE */
LINUX_SIGKILL, /* SIGKILL */
LINUX_SIGBUS, /* SIGBUS */
LINUX_SIGSEGV, /* SIGSEGV */
LINUX_SIGSYS, /* SIGSYS */
LINUX_SIGPIPE, /* SIGPIPE */
LINUX_SIGALRM, /* SIGALRM */
LINUX_SIGTERM, /* SIGTERM */
LINUX_SIGURG, /* SIGURG */
LINUX_SIGSTOP, /* SIGSTOP */
LINUX_SIGTSTP, /* SIGTSTP */
LINUX_SIGCONT, /* SIGCONT */
LINUX_SIGCHLD, /* SIGCHLD */
LINUX_SIGTTIN, /* SIGTTIN */
LINUX_SIGTTOU, /* SIGTTOU */
LINUX_SIGIO, /* SIGIO */
LINUX_SIGXCPU, /* SIGXCPU */
LINUX_SIGXFSZ, /* SIGXFSZ */
LINUX_SIGVTALRM,/* SIGVTALRM */
LINUX_SIGPROF, /* SIGPROF */
LINUX_SIGWINCH, /* SIGWINCH */
0, /* SIGINFO */
LINUX_SIGUSR1, /* SIGUSR1 */
LINUX_SIGUSR2 /* SIGUSR2 */
};
static int linux_to_bsd_sigtbl[LINUX_SIGTBLSZ] = {
SIGHUP, /* LINUX_SIGHUP */
SIGINT, /* LINUX_SIGINT */
SIGQUIT, /* LINUX_SIGQUIT */
SIGILL, /* LINUX_SIGILL */
SIGTRAP, /* LINUX_SIGTRAP */
SIGABRT, /* LINUX_SIGABRT */
SIGBUS, /* LINUX_SIGBUS */
SIGFPE, /* LINUX_SIGFPE */
SIGKILL, /* LINUX_SIGKILL */
SIGUSR1, /* LINUX_SIGUSR1 */
SIGSEGV, /* LINUX_SIGSEGV */
SIGUSR2, /* LINUX_SIGUSR2 */
SIGPIPE, /* LINUX_SIGPIPE */
SIGALRM, /* LINUX_SIGALRM */
SIGTERM, /* LINUX_SIGTERM */
SIGBUS, /* LINUX_SIGSTKFLT */
SIGCHLD, /* LINUX_SIGCHLD */
SIGCONT, /* LINUX_SIGCONT */
SIGSTOP, /* LINUX_SIGSTOP */
SIGTSTP, /* LINUX_SIGTSTP */
SIGTTIN, /* LINUX_SIGTTIN */
SIGTTOU, /* LINUX_SIGTTOU */
SIGURG, /* LINUX_SIGURG */
SIGXCPU, /* LINUX_SIGXCPU */
SIGXFSZ, /* LINUX_SIGXFSZ */
SIGVTALRM, /* LINUX_SIGVTALARM */
SIGPROF, /* LINUX_SIGPROF */
SIGWINCH, /* LINUX_SIGWINCH */
SIGIO, /* LINUX_SIGIO */
/*
* FreeBSD does not have SIGPWR signal, map Linux SIGPWR signal
* to the first unused FreeBSD signal number. Since Linux supports
* signals from 1 to 64 we are ok here as our SIGRTMIN = 65.
*/
SIGRTMIN, /* LINUX_SIGPWR */
SIGSYS /* LINUX_SIGSYS */
};
/*
* Map Linux RT signals to the FreeBSD RT signals.
*/
static inline int
linux_to_bsd_rt_signal(int sig)
{
return (SIGRTMIN + 1 + sig - LINUX_SIGRTMIN);
}
static inline int
bsd_to_linux_rt_signal(int sig)
{
return (sig - SIGRTMIN - 1 + LINUX_SIGRTMIN);
}
int
linux_to_bsd_signal(int sig)
{
KASSERT(sig > 0 && sig <= LINUX_SIGRTMAX, ("invalid Linux signal %d\n", sig));
if (sig < LINUX_SIGRTMIN)
return (linux_to_bsd_sigtbl[_SIG_IDX(sig)]);
return (linux_to_bsd_rt_signal(sig));
}
int
bsd_to_linux_signal(int sig)
{
if (sig <= LINUX_SIGTBLSZ)
return (bsd_to_linux_sigtbl[_SIG_IDX(sig)]);
if (sig == SIGRTMIN)
return (LINUX_SIGPWR);
return (bsd_to_linux_rt_signal(sig));
}
int
linux_to_bsd_sigaltstack(int lsa)
{
int bsa = 0;
if (lsa & LINUX_SS_DISABLE)
bsa |= SS_DISABLE;
/*
* Linux ignores SS_ONSTACK flag for ss
* parameter while FreeBSD prohibits it.
*/
return (bsa);
}
int
bsd_to_linux_sigaltstack(int bsa)
{
int lsa = 0;
if (bsa & SS_DISABLE)
lsa |= LINUX_SS_DISABLE;
if (bsa & SS_ONSTACK)
lsa |= LINUX_SS_ONSTACK;
return (lsa);
}
void
linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
{
int b, l;
SIGEMPTYSET(*bss);
for (l = 1; l <= LINUX_SIGRTMAX; l++) {
if (LINUX_SIGISMEMBER(*lss, l)) {
b = linux_to_bsd_signal(l);
if (b)
SIGADDSET(*bss, b);
}
}
}
void
bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
{
int b, l;
LINUX_SIGEMPTYSET(*lss);
for (b = 1; b <= SIGRTMAX; b++) {
if (SIGISMEMBER(*bss, b)) {
l = bsd_to_linux_signal(b);
if (l)
LINUX_SIGADDSET(*lss, l);
}
}
}
/*
* Translate a Linux interface name to a FreeBSD interface name,
* and return the associated ifnet structure
* bsdname and lxname need to be least IFNAMSIZ bytes long, but
* can point to the same buffer.
*/
struct ifnet *
ifname_linux_to_bsd(struct thread *td, const char *lxname, char *bsdname)
{
struct ifnet *ifp;
int len, unit;
char *ep;
int index;
bool is_eth, is_lo;
for (len = 0; len < LINUX_IFNAMSIZ; ++len)
if (!isalpha(lxname[len]) || lxname[len] == '\0')
break;
if (len == 0 || len == LINUX_IFNAMSIZ)
return (NULL);
/* Linux loopback interface name is lo (not lo0) */
is_lo = (len == 2 && strncmp(lxname, "lo", len) == 0);
unit = (int)strtoul(lxname + len, &ep, 10);
if ((ep == NULL || ep == lxname + len || ep >= lxname + LINUX_IFNAMSIZ) &&
is_lo == 0)
return (NULL);
index = 0;
is_eth = (len == 3 && strncmp(lxname, "eth", len) == 0);
CURVNET_SET(TD_TO_VNET(td));
IFNET_RLOCK();
CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
/*
* Allow Linux programs to use FreeBSD names. Don't presume
* we never have an interface named "eth", so don't make
* the test optional based on is_eth.
*/
if (strncmp(ifp->if_xname, lxname, LINUX_IFNAMSIZ) == 0)
break;
if (is_eth && IFP_IS_ETH(ifp) && unit == index++)
break;
if (is_lo && IFP_IS_LOOP(ifp))
break;
}
IFNET_RUNLOCK();
CURVNET_RESTORE();
if (ifp != NULL && bsdname != NULL)
strlcpy(bsdname, ifp->if_xname, IFNAMSIZ);
return (ifp);
}
void
linux_ifflags(struct ifnet *ifp, short *flags)
{
unsigned short fl;
fl = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
*flags = 0;
if (fl & IFF_UP)
*flags |= LINUX_IFF_UP;
if (fl & IFF_BROADCAST)
*flags |= LINUX_IFF_BROADCAST;
if (fl & IFF_DEBUG)
*flags |= LINUX_IFF_DEBUG;
if (fl & IFF_LOOPBACK)
*flags |= LINUX_IFF_LOOPBACK;
if (fl & IFF_POINTOPOINT)
*flags |= LINUX_IFF_POINTOPOINT;
if (fl & IFF_DRV_RUNNING)
*flags |= LINUX_IFF_RUNNING;
if (fl & IFF_NOARP)
*flags |= LINUX_IFF_NOARP;
if (fl & IFF_PROMISC)
*flags |= LINUX_IFF_PROMISC;
if (fl & IFF_ALLMULTI)
*flags |= LINUX_IFF_ALLMULTI;
if (fl & IFF_MULTICAST)
*flags |= LINUX_IFF_MULTICAST;
}
int
linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa)
{
struct ifaddr *ifa;
struct sockaddr_dl *sdl;
if (IFP_IS_LOOP(ifp)) {
bzero(lsa, sizeof(*lsa));
lsa->sa_family = LINUX_ARPHRD_LOOPBACK;
return (0);
}
if (!IFP_IS_ETH(ifp))
return (ENOENT);
CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
sdl = (struct sockaddr_dl*)ifa->ifa_addr;
if (sdl != NULL && (sdl->sdl_family == AF_LINK) &&
(sdl->sdl_type == IFT_ETHER)) {
bzero(lsa, sizeof(*lsa));
lsa->sa_family = LINUX_ARPHRD_ETHER;
bcopy(LLADDR(sdl), lsa->sa_data, LINUX_IFHWADDRLEN);
return (0);
}
}
return (ENOENT);
}
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