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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /net/ipv4/netfilter/iptable_security.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/ipv4/netfilter/iptable_security.c')
-rw-r--r-- | net/ipv4/netfilter/iptable_security.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/iptable_security.c b/net/ipv4/netfilter/iptable_security.c new file mode 100644 index 0000000000..d885443cb2 --- /dev/null +++ b/net/ipv4/netfilter/iptable_security.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * "security" table + * + * This is for use by Mandatory Access Control (MAC) security models, + * which need to be able to manage security policy in separate context + * to DAC. + * + * Based on iptable_mangle.c + * + * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling + * Copyright (C) 2000-2004 Netfilter Core Team <coreteam <at> netfilter.org> + * Copyright (C) 2008 Red Hat, Inc., James Morris <jmorris <at> redhat.com> + */ +#include <linux/module.h> +#include <linux/netfilter_ipv4/ip_tables.h> +#include <linux/slab.h> +#include <net/ip.h> + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("James Morris <jmorris <at> redhat.com>"); +MODULE_DESCRIPTION("iptables security table, for MAC rules"); + +#define SECURITY_VALID_HOOKS (1 << NF_INET_LOCAL_IN) | \ + (1 << NF_INET_FORWARD) | \ + (1 << NF_INET_LOCAL_OUT) + +static const struct xt_table security_table = { + .name = "security", + .valid_hooks = SECURITY_VALID_HOOKS, + .me = THIS_MODULE, + .af = NFPROTO_IPV4, + .priority = NF_IP_PRI_SECURITY, +}; + +static struct nf_hook_ops *sectbl_ops __read_mostly; + +static int iptable_security_table_init(struct net *net) +{ + struct ipt_replace *repl; + int ret; + + repl = ipt_alloc_initial_table(&security_table); + if (repl == NULL) + return -ENOMEM; + ret = ipt_register_table(net, &security_table, repl, sectbl_ops); + kfree(repl); + return ret; +} + +static void __net_exit iptable_security_net_pre_exit(struct net *net) +{ + ipt_unregister_table_pre_exit(net, "security"); +} + +static void __net_exit iptable_security_net_exit(struct net *net) +{ + ipt_unregister_table_exit(net, "security"); +} + +static struct pernet_operations iptable_security_net_ops = { + .pre_exit = iptable_security_net_pre_exit, + .exit = iptable_security_net_exit, +}; + +static int __init iptable_security_init(void) +{ + int ret = xt_register_template(&security_table, + iptable_security_table_init); + + if (ret < 0) + return ret; + + sectbl_ops = xt_hook_ops_alloc(&security_table, ipt_do_table); + if (IS_ERR(sectbl_ops)) { + xt_unregister_template(&security_table); + return PTR_ERR(sectbl_ops); + } + + ret = register_pernet_subsys(&iptable_security_net_ops); + if (ret < 0) { + xt_unregister_template(&security_table); + kfree(sectbl_ops); + return ret; + } + + return ret; +} + +static void __exit iptable_security_fini(void) +{ + unregister_pernet_subsys(&iptable_security_net_ops); + kfree(sectbl_ops); + xt_unregister_template(&security_table); +} + +module_init(iptable_security_init); +module_exit(iptable_security_fini); |