1 files changed, 214 insertions, 0 deletions

diff --git a/net/netlabel/netlabel_user.h b/net/netlabel/netlabel_user.h
new file mode 100644
index 000000000000..ccf237b3a128
--- /dev/null
+++ b/net/netlabel/netlabel_user.h
@@ -0,0 +1,214 @@
+/*
+ * NetLabel NETLINK Interface
+ *
+ * This file defines the NETLINK interface for the NetLabel system.  The
+ * NetLabel system manages static and dynamic label mappings for network
+ * protocols such as CIPSO and RIPSO.
+ *
+ * Author: Paul Moore <paul.moore@hp.com>
+ *
+ */
+
+/*
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ *
+ * This program is free software;  you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program;  if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef _NETLABEL_USER_H
+#define _NETLABEL_USER_H
+
+#include <linux/skbuff.h>
+#include <linux/capability.h>
+#include <linux/genetlink.h>
+#include <net/netlabel.h>
+#include <net/genetlink.h>
+
+/* NetLabel NETLINK helper functions */
+
+/**
+ * netlbl_netlink_cap_check - Check the NETLINK msg capabilities
+ * @skb: the NETLINK buffer
+ * @req_cap: the required capability
+ *
+ * Description:
+ * Check the NETLINK buffer's capabilities against the required capabilities.
+ * Returns zero on success, negative values on failure.
+ *
+ */
+static inline int netlbl_netlink_cap_check(const struct sk_buff *skb,
+                                           kernel_cap_t req_cap)
+{
+        if (cap_raised(NETLINK_CB(skb).eff_cap, req_cap))
+                return 0;
+        return -EPERM;
+}
+
+/**
+ * netlbl_getinc_u8 - Read a u8 value from a nlattr stream and move on
+ * @nla: the attribute
+ * @rem_len: remaining length
+ *
+ * Description:
+ * Return a u8 value pointed to by @nla and advance it to the next attribute.
+ *
+ */
+static inline u8 netlbl_getinc_u8(struct nlattr **nla, int *rem_len)
+{
+        u8 val = nla_get_u8(*nla);
+        *nla = nla_next(*nla, rem_len);
+        return val;
+}
+
+/**
+ * netlbl_getinc_u16 - Read a u16 value from a nlattr stream and move on
+ * @nla: the attribute
+ * @rem_len: remaining length
+ *
+ * Description:
+ * Return a u16 value pointed to by @nla and advance it to the next attribute.
+ *
+ */
+static inline u16 netlbl_getinc_u16(struct nlattr **nla, int *rem_len)
+{
+        u16 val = nla_get_u16(*nla);
+        *nla = nla_next(*nla, rem_len);
+        return val;
+}
+
+/**
+ * netlbl_getinc_u32 - Read a u32 value from a nlattr stream and move on
+ * @nla: the attribute
+ * @rem_len: remaining length
+ *
+ * Description:
+ * Return a u32 value pointed to by @nla and advance it to the next attribute.
+ *
+ */
+static inline u32 netlbl_getinc_u32(struct nlattr **nla, int *rem_len)
+{
+        u32 val = nla_get_u32(*nla);
+        *nla = nla_next(*nla, rem_len);
+        return val;
+}
+
+/**
+ * netlbl_netlink_hdr_put - Write the NETLINK buffers into a sk_buff
+ * @skb: the packet
+ * @pid: the PID of the receipient
+ * @seq: the sequence number
+ * @type: the generic NETLINK message family type
+ * @cmd: command
+ *
+ * Description:
+ * Write both a NETLINK nlmsghdr structure and a Generic NETLINK genlmsghdr
+ * struct to the packet.  Returns a pointer to the start of the payload buffer
+ * on success or NULL on failure.
+ *
+ */
+static inline void *netlbl_netlink_hdr_put(struct sk_buff *skb,
+                                           u32 pid,
+                                           u32 seq,
+                                           int type,
+                                           u8 cmd)
+{
+        return genlmsg_put(skb,
+                           pid,
+                           seq,
+                           type,
+                           0,
+                           0,
+                           cmd,
+                           NETLBL_PROTO_VERSION);
+}
+
+/**
+ * netlbl_netlink_hdr_push - Write the NETLINK buffers into a sk_buff
+ * @skb: the packet
+ * @pid: the PID of the receipient
+ * @seq: the sequence number
+ * @type: the generic NETLINK message family type
+ * @cmd: command
+ *
+ * Description:
+ * Write both a NETLINK nlmsghdr structure and a Generic NETLINK genlmsghdr
+ * struct to the packet.
+ *
+ */
+static inline void netlbl_netlink_hdr_push(struct sk_buff *skb,
+                                           u32 pid,
+                                           u32 seq,
+                                           int type,
+                                           u8 cmd)
+
+{
+        struct nlmsghdr *nlh;
+        struct genlmsghdr *hdr;
+
+        nlh = (struct nlmsghdr *)skb_push(skb, NLMSG_SPACE(GENL_HDRLEN));
+        nlh->nlmsg_type = type;
+        nlh->nlmsg_len = skb->len;
+        nlh->nlmsg_flags = 0;
+        nlh->nlmsg_pid = pid;
+        nlh->nlmsg_seq = seq;
+
+        hdr = nlmsg_data(nlh);
+        hdr->cmd = cmd;
+        hdr->version = NETLBL_PROTO_VERSION;
+        hdr->reserved = 0;
+}
+
+/**
+ * netlbl_netlink_payload_len - Return the length of the payload
+ * @skb: the NETLINK buffer
+ *
+ * Description:
+ * This function returns the length of the NetLabel payload.
+ *
+ */
+static inline u32 netlbl_netlink_payload_len(const struct sk_buff *skb)
+{
+        return nlmsg_len((struct nlmsghdr *)skb->data) - GENL_HDRLEN;
+}
+
+/**
+ * netlbl_netlink_payload_data - Returns a pointer to the start of the payload
+ * @skb: the NETLINK buffer
+ *
+ * Description:
+ * This function returns a pointer to the start of the NetLabel payload.
+ *
+ */
+static inline void *netlbl_netlink_payload_data(const struct sk_buff *skb)
+{
+  return (unsigned char *)nlmsg_data((struct nlmsghdr *)skb->data) +
+          GENL_HDRLEN;
+}
+
+/* NetLabel common protocol functions */
+
+void netlbl_netlink_send_ack(const struct genl_info *info,
+                             u32 genl_family,
+                             u8 ack_cmd,
+                             u32 ret_code);
+
+/* NetLabel NETLINK I/O functions */
+
+int netlbl_netlink_init(void);
+int netlbl_netlink_snd(struct sk_buff *skb, u32 pid);
+int netlbl_netlink_snd_multicast(struct sk_buff *skb, u32 pid, u32 group);
+
+#endif