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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /security/selinux/netlink.c
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'security/selinux/netlink.c')
-rw-r--r--security/selinux/netlink.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/security/selinux/netlink.c b/security/selinux/netlink.c
new file mode 100644
index 00000000000..18d08acafa7
--- /dev/null
+++ b/security/selinux/netlink.c
@@ -0,0 +1,113 @@
+/*
+ * Netlink event notifications for SELinux.
+ *
+ * Author: James Morris <jmorris@redhat.com>
+ *
+ * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+#include <linux/netlink.h>
+#include <linux/selinux_netlink.h>
+
+static struct sock *selnl;
+
+static int selnl_msglen(int msgtype)
+{
+ int ret = 0;
+
+ switch (msgtype) {
+ case SELNL_MSG_SETENFORCE:
+ ret = sizeof(struct selnl_msg_setenforce);
+ break;
+
+ case SELNL_MSG_POLICYLOAD:
+ ret = sizeof(struct selnl_msg_policyload);
+ break;
+
+ default:
+ BUG();
+ }
+ return ret;
+}
+
+static void selnl_add_payload(struct nlmsghdr *nlh, int len, int msgtype, void *data)
+{
+ switch (msgtype) {
+ case SELNL_MSG_SETENFORCE: {
+ struct selnl_msg_setenforce *msg = NLMSG_DATA(nlh);
+
+ memset(msg, 0, len);
+ msg->val = *((int *)data);
+ break;
+ }
+
+ case SELNL_MSG_POLICYLOAD: {
+ struct selnl_msg_policyload *msg = NLMSG_DATA(nlh);
+
+ memset(msg, 0, len);
+ msg->seqno = *((u32 *)data);
+ break;
+ }
+
+ default:
+ BUG();
+ }
+}
+
+static void selnl_notify(int msgtype, void *data)
+{
+ int len;
+ unsigned char *tmp;
+ struct sk_buff *skb;
+ struct nlmsghdr *nlh;
+
+ len = selnl_msglen(msgtype);
+
+ skb = alloc_skb(NLMSG_SPACE(len), GFP_USER);
+ if (!skb)
+ goto oom;
+
+ tmp = skb->tail;
+ nlh = NLMSG_PUT(skb, 0, 0, msgtype, len);
+ selnl_add_payload(nlh, len, msgtype, data);
+ nlh->nlmsg_len = skb->tail - tmp;
+ netlink_broadcast(selnl, skb, 0, SELNL_GRP_AVC, GFP_USER);
+out:
+ return;
+
+nlmsg_failure:
+ kfree_skb(skb);
+oom:
+ printk(KERN_ERR "SELinux: OOM in %s\n", __FUNCTION__);
+ goto out;
+}
+
+void selnl_notify_setenforce(int val)
+{
+ selnl_notify(SELNL_MSG_SETENFORCE, &val);
+}
+
+void selnl_notify_policyload(u32 seqno)
+{
+ selnl_notify(SELNL_MSG_POLICYLOAD, &seqno);
+}
+
+static int __init selnl_init(void)
+{
+ selnl = netlink_kernel_create(NETLINK_SELINUX, NULL);
+ if (selnl == NULL)
+ panic("SELinux: Cannot create netlink socket.");
+ netlink_set_nonroot(NETLINK_SELINUX, NL_NONROOT_RECV);
+ return 0;
+}
+
+__initcall(selnl_init);