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#pragma once
/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <seccomp.h>
#include <stdbool.h>
#include <stdint.h>
#include "set.h"
const char* seccomp_arch_to_string(uint32_t c);
int seccomp_arch_from_string(const char *n, uint32_t *ret);
int seccomp_init_for_arch(scmp_filter_ctx *ret, uint32_t arch, uint32_t default_action);
bool is_seccomp_available(void);
typedef struct SyscallFilterSet {
const char *name;
const char *help;
const char *value;
} SyscallFilterSet;
enum {
/* Please leave DEFAULT first, but sort the rest alphabetically */
SYSCALL_FILTER_SET_DEFAULT,
SYSCALL_FILTER_SET_BASIC_IO,
SYSCALL_FILTER_SET_CLOCK,
SYSCALL_FILTER_SET_CPU_EMULATION,
SYSCALL_FILTER_SET_DEBUG,
SYSCALL_FILTER_SET_FILE_SYSTEM,
SYSCALL_FILTER_SET_IO_EVENT,
SYSCALL_FILTER_SET_IPC,
SYSCALL_FILTER_SET_KEYRING,
SYSCALL_FILTER_SET_MODULE,
SYSCALL_FILTER_SET_MOUNT,
SYSCALL_FILTER_SET_NETWORK_IO,
SYSCALL_FILTER_SET_OBSOLETE,
SYSCALL_FILTER_SET_PRIVILEGED,
SYSCALL_FILTER_SET_PROCESS,
SYSCALL_FILTER_SET_RAW_IO,
SYSCALL_FILTER_SET_REBOOT,
SYSCALL_FILTER_SET_RESOURCES,
SYSCALL_FILTER_SET_SWAP,
_SYSCALL_FILTER_SET_MAX
};
extern const SyscallFilterSet syscall_filter_sets[];
const SyscallFilterSet *syscall_filter_set_find(const char *name);
int seccomp_load_syscall_filter_set(uint32_t default_action, const SyscallFilterSet *set, uint32_t action);
int seccomp_load_syscall_filter_set_raw(uint32_t default_action, Set* set, uint32_t action);
int seccomp_restrict_archs(Set *archs);
int seccomp_restrict_namespaces(unsigned long retain);
int seccomp_protect_sysctl(void);
int seccomp_restrict_address_families(Set *address_families, bool whitelist);
int seccomp_restrict_realtime(void);
int seccomp_memory_deny_write_execute(void);
#if defined(__i386__) || defined(__s390x__) || defined(__s390__) || defined(__powerpc64__) || defined(__powerpc__) || defined (__mips__)
/* On these archs, socket() is implemented via the socketcall() syscall multiplexer, and we can't restrict it hence via
* seccomp */
#define SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN 1
#else
#define SECCOMP_RESTRICT_ADDRESS_FAMILIES_BROKEN 0
#endif
/* mmap() blocking is only available on some archs for now */
#if defined(__x86_64__) || defined(__i386__)
#define SECCOMP_MEMORY_DENY_WRITE_EXECUTE_BROKEN 0
#else
#define SECCOMP_MEMORY_DENY_WRITE_EXECUTE_BROKEN 1
#endif
/* we don't know the right order of the clone() parameters except for these archs, for now */
#if defined(__x86_64__) || defined(__i386__) || defined(__s390x__) || defined(__s390__) || defined(__powerpc64__)
#define SECCOMP_RESTRICT_NAMESPACES_BROKEN 0
#else
#define SECCOMP_RESTRICT_NAMESPACES_BROKEN 1
#endif
extern const uint32_t seccomp_local_archs[];
#define SECCOMP_FOREACH_LOCAL_ARCH(arch) \
for (unsigned _i = ({ (arch) = seccomp_local_archs[0]; 0; }); \
seccomp_local_archs[_i] != (uint32_t) -1; \
(arch) = seccomp_local_archs[++_i])
DEFINE_TRIVIAL_CLEANUP_FUNC(scmp_filter_ctx, seccomp_release);
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