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Message-Id: <1262437456-24476-5-git-send-email-sam@synack.fr>
Date: Sat, 2 Jan 2010 14:04:11 +0100
From: Samir Bellabes <sam@...ack.fr>
To: linux-security-module@...r.kernel.org
Cc: Patrick McHardy <kaber@...sh.net>, jamal <hadi@...erus.ca>,
Evgeniy Polyakov <zbr@...emap.net>,
Neil Horman <nhorman@...driver.com>, netdev@...r.kernel.org,
netfilter-devel@...r.kernel.org, Samir Bellabes <sam@...ack.fr>
Subject: [RFC 4/9] snet: introduce snet_core.c and snet.h
this patch introduce snet_core.c, which provides main functions to start and
stop snet's subsystems :
- snet_hooks : LSM hooks
- snet_netlink : kernel-user communication (genetlink)
- snet_event : manages the table of protected syscalls
- snet_verdict : provides a wait queue for syscalls and manage verdicts
from userspace
Signed-off-by: Samir Bellabes <sam@...ack.fr>
---
security/snet/include/snet.h | 29 ++++++++++++++++
security/snet/snet_core.c | 77 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 106 insertions(+), 0 deletions(-)
create mode 100644 security/snet/include/snet.h
create mode 100644 security/snet/snet_core.c
diff --git a/security/snet/include/snet.h b/security/snet/include/snet.h
new file mode 100644
index 0000000..b664a47
--- /dev/null
+++ b/security/snet/include/snet.h
@@ -0,0 +1,29 @@
+#ifndef _SNET_H
+#define _SNET_H
+
+#include "snet_hooks.h"
+
+#define SNET_VERSION 0x1
+#define SNET_NAME "snet"
+
+#define SNET_PRINTK(enable, fmt, arg...) \
+ do { \
+ if (enable) \
+ printk(KERN_INFO "%s: %s: " fmt , \
+ SNET_NAME , __func__ , \
+ ## arg); \
+ } while (0)
+
+#ifdef CONFIG_SECURITY_SNET_DEBUG
+extern unsigned int snet_debug;
+#define snet_dbg(fmt, arg...) SNET_PRINTK(snet_debug, fmt, ##arg)
+#else
+#define snet_dbg(fmt, arg...)
+#endif
+
+struct snet_event {
+ enum snet_syscall syscall;
+ u8 protocol;
+} __attribute__ ((packed));
+
+#endif /* _SNET_H */
diff --git a/security/snet/snet_core.c b/security/snet/snet_core.c
new file mode 100644
index 0000000..34b61e9
--- /dev/null
+++ b/security/snet/snet_core.c
@@ -0,0 +1,77 @@
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <net/genetlink.h>
+
+#include "snet.h"
+#include "snet_hooks.h"
+#include "snet_netlink.h"
+#include "snet_event.h"
+#include "snet_verdict.h"
+#include "snet_utils.h"
+
+unsigned int event_hash_size = 16;
+module_param(event_hash_size, uint, 0600);
+MODULE_PARM_DESC(event_hash_size, "Set the size of the event hash table");
+
+unsigned int verdict_hash_size = 16;
+module_param(verdict_hash_size, uint, 0600);
+MODULE_PARM_DESC(verdict_hash_size, "Set the size of the verdict hash table");
+
+unsigned int snet_verdict_delay = 5;
+module_param(snet_verdict_delay, uint, 0600);
+MODULE_PARM_DESC(snet_verdict_delay, "Set the timeout for verdicts in secs");
+
+unsigned int snet_verdict_policy = SNET_VERDICT_GRANT; /* permissive by default */
+module_param(snet_verdict_policy, uint, 0600);
+MODULE_PARM_DESC(snet_verdict_policy, "Set the default verdict");
+
+#ifdef CONFIG_SECURITY_SNET_DEBUG
+unsigned int snet_debug;
+EXPORT_SYMBOL_GPL(snet_debug);
+module_param(snet_debug, bool, 0644);
+MODULE_PARM_DESC(snet_debug, "Enable debug messages");
+#endif
+
+void snet_core_exit(void)
+{
+ snet_netlink_exit();
+ snet_event_exit();
+ snet_hooks_exit();
+ snet_verdict_exit();
+ snet_dbg("stopped\n");
+}
+
+static __init int snet_init(void)
+{
+ int ret;
+
+ snet_dbg("initializing: event_hash_size=%u "
+ "verdict_hash_size=%u verdict_delay=%usecs "
+ "default_policy=%s\n",
+ event_hash_size, verdict_hash_size, snet_verdict_delay,
+ snet_verdict_name(snet_verdict_policy));
+
+ ret = snet_event_init();
+ if (ret < 0)
+ goto exit;
+
+ ret = snet_verdict_init();
+ if (ret < 0)
+ goto exit;
+
+ ret = snet_hooks_init();
+ if (ret < 0)
+ goto exit;
+
+ snet_dbg("started\n");
+ return 0;
+exit:
+ snet_core_exit();
+ return ret;
+}
+
+security_initcall(snet_init);
+
+MODULE_DESCRIPTION("snet - Security for NETwork syscalls");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Samir Bellabes <sam@...ack.fr>");
--
1.6.3.3
--
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