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Message-Id: <1406856100-21674-3-git-send-email-pmoody@google.com>
Date: Thu, 31 Jul 2014 18:21:40 -0700
From: Peter Moody <pmoody@...gle.com>
To: linux-security-module@...r.kernel.org
Cc: brandon.carpenter@...l.gov, casey@...aufler-ca.com,
netdev@...r.kernel.org, Peter Moody <pmoody@...gle.com>
Subject: [PATCH 2/2] security: Hone LSM
This adds the Hone (Host/Network) process <-> packet correlation
module to the linux security subsystem. Hone aims to provide network
administrators with the ability to correlate network activity seen on
the network to the process which sent/received it.
Signed-off-by: Peter Moody <pmoody@...gle.com>
---
include/linux/hone.h | 50 +++
security/Kconfig | 1 +
security/Makefile | 2 +
security/hone/Kconfig | 8 +
security/hone/Makefile | 3 +
security/hone/hone.h | 164 ++++++++++
security/hone/hone_event.c | 625 +++++++++++++++++++++++++++++++++++++
security/hone/hone_lsm.c | 183 +++++++++++
security/hone/hone_mmutil.c | 106 +++++++
security/hone/hone_mmutil.h | 20 ++
security/hone/hone_notify.c | 450 ++++++++++++++++++++++++++
security/hone/hone_pcapng.c | 596 +++++++++++++++++++++++++++++++++++
security/hone/hone_pcapng.h | 30 ++
security/hone/hone_ringbuf.c | 51 +++
security/hone/hone_ringbuf.h | 34 ++
security/hone/hone_socket_lookup.c | 264 ++++++++++++++++
16 files changed, 2587 insertions(+)
create mode 100644 include/linux/hone.h
create mode 100644 security/hone/Kconfig
create mode 100644 security/hone/Makefile
create mode 100644 security/hone/hone.h
create mode 100644 security/hone/hone_event.c
create mode 100644 security/hone/hone_lsm.c
create mode 100644 security/hone/hone_mmutil.c
create mode 100644 security/hone/hone_mmutil.h
create mode 100644 security/hone/hone_notify.c
create mode 100644 security/hone/hone_pcapng.c
create mode 100644 security/hone/hone_pcapng.h
create mode 100644 security/hone/hone_ringbuf.c
create mode 100644 security/hone/hone_ringbuf.h
create mode 100644 security/hone/hone_socket_lookup.c
diff --git a/include/linux/hone.h b/include/linux/hone.h
new file mode 100644
index 0000000..7ad7ad8
--- /dev/null
+++ b/include/linux/hone.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ */
+
+#include <linux/skbuff.h>
+
+#ifndef _INCLUDE_LINUX_HONE_H
+#define _INCLUDE_LINUX_HONE_H
+
+#define PKTNOT_PACKET_IN 1
+#define PKTNOT_PACKET_OUT 2
+
+/* hone block types for pcapng blocks */
+#define HONE_IF_DESC_BLOCK 0x00000001
+#define HONE_IF_STATS_BLOCK 0x00000005
+#define HONE_PACKET_BLOCK 0x00000006
+#define HONE_PROCESS_BLOCK 0x00000101
+#define HONE_CONNECTION_BLOCK 0x00000102
+#define HONE_SECTION_HDR_BLOCK 0x0A0D0D0A
+
+/* ioctls for controlling hone. */
+#define HEIO_RESTART _IO(0xE0, 0x01)
+#define HEIO_GET_AT_HEAD _IO(0xE0, 0x03)
+#define HEIO_GET_SNAPLEN _IOR(0xE0, 0x04, int)
+#define HEIO_SET_SNAPLEN _IOW(0xE0, 0x05, int)
+#define HEIO_SET_FILTER_SOCK _IOW(0xE0, 0x06, int)
+
+#define HONE_PROCESS 1
+#define HONE_SOCKET 2
+#define HONE_PACKET 3
+#define HONE_USER 0x8000
+
+#define PROC_FORK 1
+#define PROC_EXEC 2
+#define PROC_EXIT 3
+#define PROC_KTHD 4
+
+void hone_exec_handler(int);
+void hone_exit_handler(void);
+void hone_fork_handler(struct task_struct *);
+void hone_raw_rcv_handler(struct sock *, struct sk_buff *);
+void hone_inet_create_handler(int, struct sock *);
+
+#endif
diff --git a/security/Kconfig b/security/Kconfig
index beb86b5..84d2b45 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -122,6 +122,7 @@ source security/smack/Kconfig
source security/tomoyo/Kconfig
source security/apparmor/Kconfig
source security/yama/Kconfig
+source security/hone/Kconfig
source security/integrity/Kconfig
diff --git a/security/Makefile b/security/Makefile
index 05f1c93..ff20918 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -8,6 +8,7 @@ subdir-$(CONFIG_SECURITY_SMACK) += smack
subdir-$(CONFIG_SECURITY_TOMOYO) += tomoyo
subdir-$(CONFIG_SECURITY_APPARMOR) += apparmor
subdir-$(CONFIG_SECURITY_YAMA) += yama
+subdir-$(CONFIG_SECURITY_HONE) += hone
# always enable default capabilities
obj-y += commoncap.o
@@ -22,6 +23,7 @@ obj-$(CONFIG_AUDIT) += lsm_audit.o
obj-$(CONFIG_SECURITY_TOMOYO) += tomoyo/
obj-$(CONFIG_SECURITY_APPARMOR) += apparmor/
obj-$(CONFIG_SECURITY_YAMA) += yama/
+obj-$(CONFIG_SECURITY_HONE) += hone/
obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
# Object integrity file lists
diff --git a/security/hone/Kconfig b/security/hone/Kconfig
new file mode 100644
index 0000000..bdaad6b
--- /dev/null
+++ b/security/hone/Kconfig
@@ -0,0 +1,8 @@
+config SECURITY_HONE
+ bool "HOst NEt corrleation engine support"
+ default n
+ help
+ This selects hone, a tool for correlating packets to
+ processes.
+
+ If you are unsure how to answer this question, answer N.
diff --git a/security/hone/Makefile b/security/hone/Makefile
new file mode 100644
index 0000000..b87c0a8
--- /dev/null
+++ b/security/hone/Makefile
@@ -0,0 +1,3 @@
+obj-$(CONFIG_SECURITY_HONE) := hone.o
+hone-y := hone_lsm.o hone_notify.o hone_ringbuf.o hone_event.o \
+ hone_mmutil.o hone_pcapng.o hone_ringbuf.o hone_socket_lookup.o
diff --git a/security/hone/hone.h b/security/hone/hone.h
new file mode 100644
index 0000000..1533cf7
--- /dev/null
+++ b/security/hone/hone.h
@@ -0,0 +1,164 @@
+#ifndef _SECURITY_HONE_HONE_H
+#define _SECURITY_HONE_HONE_H
+
+#include <linux/hone.h>
+#include <linux/tcp.h>
+
+#define HONE_USER_HEAD (HONE_USER | 1)
+#define HONE_USER_TAIL (HONE_USER | 2)
+
+#define READER_HEAD 0x00000001
+#define READER_INIT 0x00000002
+#define READER_TAIL 0x00000004
+#define READER_FINISH 0x00000008
+#define READER_RESTART 0x0000000F
+#define READER_FILTER_PID 0x00000100
+
+struct guid_struct {
+ uint32_t data1;
+ uint16_t data2;
+ uint16_t data3;
+ uint8_t data4[8];
+};
+
+struct device_info {
+ struct guid_struct host_guid;
+ bool host_guid_is_set;
+ const char *host_id;
+ const char *comment;
+ struct dentry *dir;
+ struct dentry *pcapng;
+ struct dentry *text;
+};
+
+struct statistics {
+ atomic64_t process;
+ atomic64_t socket;
+ atomic64_t packet;
+};
+
+struct reader_info {
+ unsigned int snaplen;
+ struct timespec boot_time;
+ struct timespec start_time;
+ struct statistics delivered;
+ struct statistics dropped;
+ atomic64_t filtered;
+};
+
+struct process_event {
+ union {
+ struct mm_struct *mm;
+ char *comm;
+ };
+ int event;
+ pid_t pid;
+ pid_t ppid;
+ pid_t tgid;
+ uid_t uid;
+ uid_t euid;
+ uid_t loginuid;
+ gid_t gid;
+ int retval;
+};
+
+struct socket_event {
+ unsigned long sock;
+ int event;
+ pid_t pid;
+ pid_t ppid;
+ pid_t tgid;
+ uid_t uid;
+ gid_t gid;
+};
+
+struct packet_event {
+ unsigned long sock;
+ int dir;
+ int len;
+ pid_t pid;
+ struct sock *sk;
+ struct sk_buff *skb;
+};
+
+struct user_event {
+ void *data;
+};
+
+struct hone_event {
+ int type;
+ union {
+ atomic_t users;
+ struct hone_event *next;
+ };
+ struct timespec ts;
+ union {
+ struct process_event process;
+ struct socket_event socket;
+ struct packet_event packet;
+ struct user_event user;
+ };
+};
+
+struct packet_args {
+ struct sock *sk;
+ struct sk_buff *skb;
+};
+
+#define STATISTICS_INIT {ATOMIC64_INIT(0), ATOMIC64_INIT(0), ATOMIC64_INIT(0)}
+#define DEFINE_STATISTICS(name) struct statistics name = STATISTICS_INIT
+
+static inline void init_statistics(struct statistics *stats)
+{
+ atomic64_set(&stats->process, 0);
+ atomic64_set(&stats->socket, 0);
+ atomic64_set(&stats->packet, 0);
+}
+
+extern void get_hone_statistics(struct statistics *received,
+ struct statistics *dropped,
+ struct timespec *ts);
+
+void free_hone_event(struct hone_event *event);
+
+int hone_notify_init(void);
+int hone_fs_init(void);
+
+int process_notifier_notify(unsigned long event, struct task_struct *task);
+int sock_notifier_notify(unsigned long event, struct sock *sk);
+int packet_notifier_notify(unsigned long event, struct packet_args *pargs);
+int hone_notifier_register(struct notifier_block *nb);
+int hone_notifier_unregister(struct notifier_block *nb);
+
+struct hone_event *__alloc_socket_event(unsigned long v, int val,
+ struct task_struct *task, gfp_t flags);
+struct hone_event *__alloc_process_event(struct task_struct *task, int type,
+ gfp_t flags);
+
+static inline void get_hone_event(struct hone_event *event)
+{
+ BUG_ON(unlikely(!atomic_read(&event->users)));
+ atomic_inc(&event->users);
+}
+
+static inline void put_hone_event(struct hone_event *event)
+{
+ BUG_ON(unlikely(!atomic_read(&event->users)));
+ if (atomic_dec_and_test(&event->users))
+ free_hone_event(event);
+}
+
+static inline void put_sock(struct sock *sk)
+{
+ if (sk->sk_state == TCP_TIME_WAIT)
+ inet_twsk_put(inet_twsk(sk));
+ else
+ sock_put(sk);
+}
+
+struct sock *lookup_v4_sock(const struct sk_buff *skb,
+ const struct net_device *indev);
+struct sock *lookup_v6_sock(const struct sk_buff *skb,
+ const struct net_device *indev);
+
+#endif
diff --git a/security/hone/hone_event.c b/security/hone/hone_event.c
new file mode 100644
index 0000000..b2339bc
--- /dev/null
+++ b/security/hone/hone_event.c
@@ -0,0 +1,625 @@
+#include <linux/kernel.h>
+#include <linux/security.h>
+#include <linux/fdtable.h>
+#include <linux/fs.h>
+#include <net/sock.h>
+#include <net/inet_sock.h>
+#include <linux/ipv6.h>
+#include <linux/ip.h>
+
+#include <linux/hone.h>
+
+#include "hone.h"
+#include "hone_mmutil.h"
+#include "hone_pcapng.h"
+#include "hone_ringbuf.h"
+
+static struct device_info devinfo = {
+ .comment = NULL,
+ .host_id = NULL,
+ .host_guid_is_set = false
+};
+
+#ifndef CONFIG_HONE_DEFAULT_PAGEORDER
+ #ifdef CONFIG_64BIT
+ #define CONFIG_HONE_DEFAULT_PAGEORDER 3
+ #else
+ #define CONFIG_HONE_DEFAULT_PAGEORDER 2
+ #endif
+#endif
+
+static unsigned int pageorder = CONFIG_HONE_DEFAULT_PAGEORDER;
+#define size_of_pages(order) (PAGE_SIZE << (order))
+#define READ_BUFFER_PAGE_ORDER 5
+#define READ_BUFFER_SIZE size_of_pages(READ_BUFFER_PAGE_ORDER)
+
+struct hone_reader {
+ struct semaphore sem;
+ struct ring_buf ringbuf;
+ struct notifier_block nb;
+ struct reader_info info;
+ atomic_t flags;
+ char *buf;
+ struct sock *filter_sk;
+ struct hone_event *event;
+ size_t length, offset;
+ wait_queue_head_t event_wait_queue;
+
+ unsigned int (*format)(const struct device_info*,
+ const struct reader_info*,
+ struct hone_event *,
+ char *, unsigned int);
+};
+
+static struct hone_event head_event = {HONE_USER_HEAD, {ATOMIC_INIT(1)} };
+static struct hone_event tail_event = {HONE_USER_TAIL, {ATOMIC_INIT(1)} };
+
+#define reader_will_block(rdr) \
+ (ring_is_empty(&(rdr)->ringbuf) && !(rdr)->event && \
+ !(atomic_read(&(rdr)->flags) & READER_RESTART))
+
+static unsigned int format_as_text(const struct device_info *devinfo,
+ const struct reader_info *info,
+ struct hone_event *event, char *buf,
+ unsigned int buflen)
+{
+ static const char * const event_names[] = {
+ "????", "FORK", "EXEC", "EXIT", "KTHD"};
+ unsigned int n = 0;
+
+#define printbuf(fmt, ...) \
+ ({ \
+ n += snprintf(buf + n, buflen - n, fmt, ##__VA_ARGS__); \
+ if (n >= buflen) \
+ goto out_long; \
+ n; \
+ })
+
+ switch (event->type) {
+ case HONE_PROCESS:
+ {
+ struct process_event *pev = &event->process;
+
+ printbuf("%lu.%09lu %s %d %d %d %d\n",
+ event->ts.tv_sec, event->ts.tv_nsec,
+ event_names[pev->event], pev->pid, pev->ppid, pev->euid,
+ pev->gid);
+
+ if (pev->mm) {
+ n--;
+ if (pev->event == PROC_KTHD)
+ printbuf(" [%s]", pev->comm);
+ else {
+ char *path, *argv;
+
+ printbuf(" \"");
+ path = mm_path(pev->mm, buf + n,
+ buflen - n - 3);
+
+ if (path) {
+ int pathlen = strlen(path);
+
+ memmove(buf + n, path, pathlen);
+ n += pathlen;
+ }
+
+ printbuf("\" ");
+ argv = buf + n;
+ n += mm_argv(pev->mm, buf + n, buflen - n - 1);
+ for ( ; argv < buf + n; argv++) {
+ if (*argv == '\0')
+ *argv = ' ';
+ }
+ }
+ printbuf("\n");
+ }
+ break;
+ }
+ case HONE_SOCKET:
+ {
+ struct socket_event *sockev = &event->socket;
+
+ printbuf("%lu.%09lu SOCK %c %d %d %d %d %08lx\n",
+ event->ts.tv_sec, event->ts.tv_nsec,
+ sockev->event ? 'C' : 'O', sockev->pid, sockev->ppid,
+ sockev->uid, sockev->gid, sockev->sock & 0xFFFFFFFF);
+ }
+ break;
+ case HONE_PACKET:
+ {
+ int offset;
+ struct iphdr _iph, *iph;
+
+ offset = skb_network_offset(event->packet.skb);
+ iph = skb_header_pointer(event->packet.skb, offset,
+ sizeof(_iph), &_iph);
+
+ printbuf("%lu.%09lu PAKT %c %08lx %u", event->ts.tv_sec,
+ event->ts.tv_nsec, event->packet.dir ? 'I' : 'O',
+ event->packet.sock & 0xFFFFFFFF, event->packet.pid);
+ if (!iph)
+ printbuf(" ? ? -> ?");
+ else if (iph->version == 4) {
+ if (iph->protocol == IPPROTO_TCP ||
+ iph->protocol == IPPROTO_UDP) {
+ struct udphdr _uh, *uh;
+
+ uh = skb_header_pointer(
+ event->packet.skb,
+ offset + (iph->ihl << 2),
+ sizeof(_uh), &_uh);
+ if (uh) {
+ printbuf(" %sv4 %pI4:%d -> %pI4:%d",
+ iph->protocol == IPPROTO_TCP
+ ? "TCP" : "UDP",
+ &iph->saddr, ntohs(uh->source),
+ &iph->daddr, ntohs(uh->dest));
+ } else {
+ printbuf(" %sv4 ? -> ?",
+ iph->protocol == IPPROTO_TCP ?
+ "TCP" : "UDP");
+ }
+ } else {
+ printbuf(" %u %pI4 -> %pI4", iph->protocol,
+ &iph->saddr, &iph->daddr);
+ }
+ } else if (iph->version == 6) {
+ struct ipv6hdr _iph6, *iph6;
+
+ iph6 = skb_header_pointer(event->packet.skb, offset,
+ sizeof(_iph6), &_iph6);
+ if (iph6->nexthdr == IPPROTO_TCP ||
+ iph6->nexthdr == IPPROTO_UDP) {
+ struct udphdr _uh, *uh;
+
+ uh = skb_header_pointer(
+ event->packet.skb,
+ offset + sizeof(struct ipv6hdr),
+ sizeof(_uh), &_uh);
+ if (uh) {
+ printbuf(" %sv6 %pI6:%d -> %pI6:%d",
+ iph6->nexthdr == IPPROTO_TCP ?
+ "TCP" : "UDP",
+ &iph6->saddr, ntohs(uh->source),
+ &iph6->daddr, ntohs(uh->dest));
+ } else {
+ printbuf(" %sv6 ? -> ?",
+ iph6->nexthdr == IPPROTO_TCP ?
+ "TCP" : "UDP");
+ }
+ } else {
+ printbuf(" %u %pI6 -> %pI6", iph6->nexthdr,
+ &iph6->saddr, &iph6->daddr);
+ }
+ } else {
+ printbuf(" ?.%d ? -> ?", iph->version);
+ }
+ printbuf(" %u\n", event->packet.skb->len);
+ }
+ break;
+ case HONE_USER_HEAD:
+ if (devinfo->host_guid_is_set)
+ printbuf("%lu.%09lu HEAD %lu.%09lu {" GUID_FMT "}\n",
+ info->start_time.tv_sec,
+ info->start_time.tv_nsec,
+ info->boot_time.tv_sec, info->boot_time.tv_nsec,
+ GUID_TUPLE(&devinfo->host_guid));
+ else
+ printbuf("%lu.%09lu HEAD %lu.%09lu\n",
+ info->start_time.tv_sec,
+ info->start_time.tv_nsec,
+ info->boot_time.tv_sec,
+ info->boot_time.tv_nsec);
+ break;
+ case HONE_USER_TAIL:
+ printbuf("%lu.%09lu TAIL\n",
+ info->start_time.tv_sec, info->start_time.tv_nsec);
+ break;
+ default:
+ printbuf("%lu.%09lu ???? %d\n",
+ event->ts.tv_sec, event->ts.tv_nsec, event->type);
+ break;
+
+ }
+
+#undef printbuf
+ return n;
+out_long:
+ snprintf(buf + buflen - 5, 5, "...\n");
+ return buflen;
+}
+
+static void free_hone_reader(struct hone_reader *reader)
+{
+ if (reader) {
+ if (reader->ringbuf.data) {
+ free_pages((unsigned long) (reader->ringbuf.data),
+ reader->ringbuf.pageorder);
+ reader->ringbuf.data = NULL;
+ }
+ if (reader->buf) {
+ free_pages((unsigned long) (reader->buf),
+ READ_BUFFER_PAGE_ORDER);
+ reader->buf = NULL;
+ }
+ kfree(reader);
+ }
+}
+
+static struct hone_reader *alloc_hone_reader(void)
+{
+ struct hone_reader *reader;
+ struct ring_buf *ring;
+
+ reader = kzalloc(sizeof(*reader), GFP_KERNEL);
+ if (!reader)
+ goto alloc_failed;
+
+ reader->buf = (typeof(reader->buf)) __get_free_pages(
+ GFP_KERNEL | __GFP_ZERO, READ_BUFFER_PAGE_ORDER);
+ if (!reader->buf)
+ goto alloc_failed;
+
+ ring = &reader->ringbuf;
+ ring->pageorder = pageorder;
+
+ ring->data = (typeof(ring->data)) __get_free_pages(
+ GFP_KERNEL | __GFP_ZERO, ring->pageorder);
+ if (!ring->data)
+ goto alloc_failed;
+ ring->length = size_of_pages(ring->pageorder) / sizeof(*(ring->data));
+
+ reader->format = format_as_pcapng;
+
+ atomic_set(&reader->flags, READER_HEAD | READER_INIT);
+ sema_init(&reader->sem, 1);
+ init_waitqueue_head(&reader->event_wait_queue);
+ return reader;
+
+alloc_failed:
+ free_hone_reader(reader);
+ return NULL;
+}
+
+static void inc_stats_counter(struct statistics *stats, int type)
+{
+ atomic64_t *counter;
+
+ switch(type) {
+ case HONE_PROCESS:
+ counter = &stats->process;
+ break;
+ case HONE_SOCKET:
+ counter = &stats->socket;
+ break;
+ case HONE_PACKET:
+ counter = &stats->packet;
+ break;
+ default:
+ return;
+ }
+ atomic64_inc(counter);
+}
+
+static inline int enqueue_event(struct hone_reader *reader,
+ struct hone_event *event)
+{
+ /* Ignore threads for now */
+ if (event->type == HONE_PROCESS &&
+ event->process.pid != event->process.tgid)
+ return 0;
+ /* Filter out packets for local socket, if set */
+ if (event->type == HONE_PACKET && reader->filter_sk &&
+ event->packet.sock == (unsigned long) reader->filter_sk) {
+ atomic64_inc(&reader->info.filtered);
+ return 0;
+ }
+
+ get_hone_event(event);
+ if (ring_append(&reader->ringbuf, event)) {
+ inc_stats_counter(&reader->info.dropped, event->type);
+ put_hone_event(event);
+ return 0;
+ }
+ return 1;
+}
+
+static int hone_event_handler(struct notifier_block *nb, unsigned long val,
+ void *v)
+{
+ struct hone_reader *reader =
+ container_of(nb, struct hone_reader, nb);
+
+ if (enqueue_event(reader, v))
+ wake_up_interruptible_all(&reader->event_wait_queue);
+ return 0;
+}
+
+static struct hone_event *__add_files(struct hone_reader *reader,
+ struct hone_event *event,
+ struct task_struct *task)
+{
+ struct files_struct *files;
+ struct file *file;
+ struct fdtable *fdt;
+ struct hone_event *sk_event;
+ struct socket *sock;
+ struct sock *sk;
+ unsigned long flags, set;
+ int i, fd, err;
+
+ files = get_files_struct(task);
+ if (!files)
+ return event;
+
+ spin_lock_irqsave(&files->file_lock, flags);
+
+ fdt = files_fdtable(files);
+ if (!fdt)
+ goto out;
+
+ for (i = 0; (fd = i * BITS_PER_LONG) < fdt->max_fds; i++) {
+ for (set = fdt->open_fds[i]; set; set >>= 1, fd++) {
+ if (!(set & 1))
+ continue;
+ file = fdt->fd[fd];
+ if (!file)
+ continue;
+
+ sock = sock_from_file(file, &err);
+ if (!sock)
+ continue;
+ sk = sock->sk;
+ if (!sk || (sk->sk_family != PF_INET &&
+ sk->sk_family != PF_INET6))
+ continue;
+
+ sk_event = __alloc_socket_event((unsigned long) sk,
+ 0, task, GFP_ATOMIC);
+ if (sk_event) {
+ sk_event->next = event;
+ event = sk_event;
+ event->ts = task->start_time;
+ } else {
+ atomic64_inc(&reader->info.dropped.socket);
+ }
+ }
+ }
+out:
+ spin_unlock_irqrestore(&files->file_lock, flags);
+ put_files_struct(files);
+ return event;
+}
+
+#define prev_task(p) \
+ list_entry_rcu((p)->tasks.prev, struct task_struct, tasks)
+
+static struct hone_event *add_current_tasks(struct hone_reader *reader,
+ struct hone_event *event)
+{
+ struct hone_event *proc_event;
+ struct task_struct *task;
+
+ rcu_read_lock();
+ for (task = &init_task; (task = prev_task(task)) != &init_task; ) {
+ if (task->flags & PF_EXITING)
+ continue;
+ event = __add_files(reader, event, task);
+ proc_event = __alloc_process_event(
+ task, task->flags & PF_FORKNOEXEC ?
+ PROC_FORK : PROC_EXEC,
+ GFP_ATOMIC);
+ if (proc_event) {
+ proc_event->next = event;
+ event = proc_event;
+ event->ts = task->start_time;
+ } else {
+ atomic64_inc(&reader->info.dropped.process);
+ }
+ }
+ rcu_read_unlock();
+ return event;
+}
+
+static void free_initial_events(struct hone_reader *reader)
+{
+ struct hone_event *event, *next;
+
+ for (event = reader->event; event; event = next) {
+ next = event->next;
+ free_hone_event(event);
+ }
+ reader->event = NULL;
+}
+
+static void add_initial_events(struct hone_reader *reader)
+{
+ free_initial_events(reader);
+ reader->event = add_current_tasks(reader, NULL);
+}
+
+static int hone_open(struct inode *inode, struct file *file)
+{
+ struct hone_reader *reader;
+ int err = -ENOMEM;
+
+ if ((file->f_flags & O_ACCMODE) != O_RDONLY) {
+ pr_err("no readonly failed\n");
+ return -EINVAL;
+ }
+
+ reader = alloc_hone_reader();
+ if (!reader) {
+ pr_err("reader alloc failed\n");
+ goto reader_failed;
+ }
+
+ if (file->f_dentry == devinfo.text)
+ reader->format = format_as_text;
+ file->private_data = reader;
+
+ getboottime(&reader->info.boot_time);
+ ktime_get_ts(&reader->info.start_time);
+ init_statistics(&reader->info.delivered);
+ init_statistics(&reader->info.dropped);
+ reader->nb.notifier_call = hone_event_handler;
+ err = hone_notifier_register(&reader->nb);
+ if (err) {
+ pr_err("hone_notifier_register() failed with error %d\n", err);
+ goto register_failed;
+ }
+ return 0;
+
+register_failed:
+ free_hone_reader(reader);
+reader_failed:
+ return err;
+}
+
+static int hone_release(struct inode *inode, struct file *file)
+{
+ struct hone_reader *reader = file->private_data;
+ struct hone_event *event;
+
+ hone_notifier_unregister(&reader->nb);
+ file->private_data = NULL;
+ while ((event = ring_pop(&reader->ringbuf)))
+ put_hone_event(event);
+ if (reader->filter_sk) {
+ sock_put(reader->filter_sk);
+ reader->filter_sk = NULL;
+ }
+ free_initial_events(reader);
+ free_hone_reader(reader);
+ return 0;
+}
+
+static ssize_t hone_read(struct file *file, char __user *buffer,
+ size_t length, loff_t *offset)
+{
+ struct hone_reader *reader = file->private_data;
+ size_t n, copied = 0;
+
+ if (!length)
+ return 0;
+
+ do {
+ while (!reader->offset && reader_will_block(reader)) {
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ if (wait_event_interruptible(
+ reader->event_wait_queue,
+ !reader_will_block(reader)))
+ return -EINTR;
+ }
+
+ if (file->f_flags & O_NONBLOCK) {
+ if (down_trylock(&reader->sem))
+ return -EAGAIN;
+ } else if (down_interruptible(&reader->sem)) {
+ return -EINTR;
+ }
+
+ while (copied < length) {
+ if (!reader->offset) {
+ int flags;
+ struct hone_event *event;
+
+ void (*free_event)(struct hone_event *);
+
+ flags = atomic_read(&reader->flags);
+ if (flags & READER_TAIL) {
+ atomic_clear_mask(READER_TAIL,
+ &reader->flags);
+ event = &tail_event;
+ free_event = NULL;
+ } else if (flags & READER_FINISH) {
+ if (!copied)
+ atomic_clear_mask(READER_FINISH,
+ &reader->flags);
+ up(&reader->sem);
+ return copied;
+ } else if (flags & READER_HEAD) {
+ atomic_clear_mask(READER_HEAD,
+ &reader->flags);
+ event = &head_event;
+ free_event = NULL;
+ } else if (flags & READER_INIT) {
+ atomic_clear_mask(READER_INIT,
+ &reader->flags);
+ add_initial_events(reader);
+ continue;
+ } else if (reader->event) {
+ event = reader->event;
+ reader->event = event->next;
+ free_event = free_hone_event;
+ } else {
+ event = ring_pop(&reader->ringbuf);
+ free_event = put_hone_event;
+ }
+
+ if (!event)
+ break;
+ reader->length = reader->format(
+ &devinfo, &reader->info,
+ event, reader->buf, READ_BUFFER_SIZE);
+ inc_stats_counter(&reader->info.delivered,
+ event->type);
+ if (free_event)
+ free_event(event);
+ }
+ n = min(reader->length - reader->offset,
+ length - copied);
+ if (copy_to_user(buffer + copied,
+ reader->buf + reader->offset, n)) {
+ up(&reader->sem);
+ return -EFAULT;
+ }
+ copied += n;
+ reader->offset += n;
+ if (reader->offset >= reader->length)
+ reader->offset = 0;
+ }
+ up(&reader->sem);
+ } while (!copied);
+ return copied;
+}
+
+static unsigned int hone_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct hone_reader *reader = file->private_data;
+
+ poll_wait(file, &reader->event_wait_queue, wait);
+ if (!reader_will_block(reader))
+ return POLLIN | POLLRDNORM;
+ return 0;
+}
+
+static const struct file_operations hone_ops = {
+ .open = hone_open,
+ .read = hone_read,
+ .release = hone_release,
+ .poll = hone_poll,
+};
+
+int __init hone_fs_init(void)
+{
+ devinfo.dir = securityfs_create_dir("hone", NULL);
+ if (IS_ERR(devinfo.dir))
+ return -1;
+ devinfo.pcapng = securityfs_create_file("pcapng", 0600,
+ devinfo.dir, NULL, &hone_ops);
+ if (!devinfo.pcapng) {
+ pr_err("could not create hone output file\n");
+ return -1;
+ }
+
+ devinfo.text = securityfs_create_file("text", 0600,
+ devinfo.dir, NULL, &hone_ops);
+ if (!devinfo.text) {
+ pr_err("could not create hone output file\n");
+ return -1;
+ }
+ return 0;
+}
diff --git a/security/hone/hone_lsm.c b/security/hone/hone_lsm.c
new file mode 100644
index 0000000..4f7e785
--- /dev/null
+++ b/security/hone/hone_lsm.c
@@ -0,0 +1,183 @@
+#include <linux/security.h>
+#include <linux/kernel.h>
+#include <linux/net.h>
+#include <linux/socket.h>
+#include <linux/sched.h>
+#include <linux/binfmts.h>
+#include <linux/netfilter.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+
+#include "hone.h"
+
+void hone_task_post_create(struct task_struct *task)
+{
+ process_notifier_notify(PROC_FORK, task);
+}
+
+void hone_task_free(struct task_struct *task)
+{
+ process_notifier_notify(PROC_EXIT, task);
+}
+
+void hone_bprm_committing_creds(struct linux_binprm *bprm)
+{
+ process_notifier_notify(PROC_EXEC, current);
+}
+
+int hone_socket_post_create(struct socket *sock, int family,
+ int type, int protocol, int kern)
+{
+ if (likely(sock->sk)) {
+ sock->sk->sk_protinfo = (void *)(unsigned long)
+ (current->pid == current->tgid ?
+ current->pid : current->tgid);
+ sock_notifier_notify(0, sock->sk);
+ }
+ return 0;
+}
+
+int hone_socket_shutdown(struct socket *sock, int how)
+{
+ sock_notifier_notify(0xFFFFFFFF, sock->sk);
+ return 0;
+}
+
+int hone_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+ struct packet_args pargs = {sk, skb};
+
+ switch (sk->sk_family) {
+ case PF_INET:
+ case PF_INET6:
+ packet_notifier_notify(PKTNOT_PACKET_IN, &pargs);
+ }
+ return 0;
+}
+
+static struct security_operations hone_ops = {
+ .name = "hone",
+
+ /* Process events. */
+ .task_post_create = hone_task_post_create,
+ .task_free = hone_task_free,
+ .bprm_committing_creds = hone_bprm_committing_creds,
+
+ /* Socket events. */
+ .socket_post_create = hone_socket_post_create,
+ .socket_shutdown = hone_socket_shutdown,
+};
+
+static unsigned int nf_hook_v4_in(
+ const struct nf_hook_ops *hook, struct sk_buff *skb,
+ const struct net_device *indev, const struct net_device *outdev,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sock *sk = lookup_v4_sock(skb, indev);
+ struct packet_args pargs = {sk, skb};
+
+ packet_notifier_notify(PKTNOT_PACKET_IN, &pargs);
+ if (sk)
+ put_sock(sk);
+ return NF_ACCEPT;
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static unsigned int nf_hook_v6_in(
+ const struct nf_hook_ops *hook, struct sk_buff *skb,
+ const struct net_device *indev, const struct net_device *outdev,
+ int (*okfn)(struct sk_buff *))
+{
+ struct sock *sk = lookup_v6_sock(skb, indev);
+ struct packet_args pargs = {sk, skb};
+
+ packet_notifier_notify(PKTNOT_PACKET_IN, &pargs);
+ if (sk)
+ put_sock(sk);
+ return NF_ACCEPT;
+}
+#endif
+
+static unsigned int nf_hook_out(
+ const struct nf_hook_ops *hook, struct sk_buff *skb,
+ const struct net_device *indev, const struct net_device *outdev,
+ int (*okfn)(struct sk_buff *))
+{
+ struct packet_args pargs = {skb->sk, skb};
+
+ packet_notifier_notify(PKTNOT_PACKET_OUT, &pargs);
+ return NF_ACCEPT;
+}
+
+static struct nf_hook_ops nf_inet_hooks[] = {
+ {
+ .list = {NULL, NULL},
+ .hook = nf_hook_v4_in,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = INT_MAX,
+ },
+ {
+ .list = {NULL, NULL},
+ .hook = nf_hook_out,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = INT_MAX,
+ },
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ {
+ .list = {NULL, NULL},
+ .hook = nf_hook_v6_in,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_INET_LOCAL_IN,
+ .priority = INT_MAX,
+ },
+ {
+ .list = {NULL, NULL},
+ .hook = nf_hook_out,
+ .owner = THIS_MODULE,
+ .pf = PF_INET6,
+ .hooknum = NF_INET_LOCAL_OUT,
+ .priority = INT_MAX,
+ },
+#endif /* CONFIG_IPV6 */
+};
+
+void hone_raw_rcv_handler(struct sock *sk, struct sk_buff *skb)
+{
+ struct packet_args pargs = {sk, skb};
+
+ packet_notifier_notify(PKTNOT_PACKET_IN, &pargs);
+}
+
+static __init int hone_net_init(void)
+{
+ int err = nf_register_hooks(nf_inet_hooks, ARRAY_SIZE(
+ nf_inet_hooks));
+ if (err) {
+ pr_err("netfilter hook registration failed (%d)\n", err);
+ return -1;
+ }
+ return 0;
+}
+
+static __init int hone_init(void)
+{
+ int ret;
+
+ if (!security_module_enable(&hone_ops))
+ return 0;
+
+ if (register_security(&hone_ops))
+ panic("hone: kernel registration failed\n");
+
+ ret = hone_notify_init() || hone_net_init() || hone_fs_init();
+ if (!ret)
+ pr_info("hone: initialized\n");
+ return ret;
+}
+
+late_initcall(hone_init);
diff --git a/security/hone/hone_mmutil.c b/security/hone/hone_mmutil.c
new file mode 100644
index 0000000..bfdb72b
--- /dev/null
+++ b/security/hone/hone_mmutil.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ *
+ * Much of the code below is based on procfs code.
+ */
+
+#include <linux/version.h>
+#include <linux/sched.h>
+#include <linux/mount.h>
+#include <linux/file.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/slab.h>
+
+static int __mm_argv(struct mm_struct *mm, char *buf, int buflen)
+{
+ char *pos;
+ unsigned long addr, size;
+
+ if (!buflen)
+ return 0;
+
+ pos = buf;
+ addr = mm->arg_start;
+ size = mm->arg_end - mm->arg_start;
+ if (size > buflen)
+ size = buflen;
+ while (size) {
+ struct page *page;
+ int bytes, offset;
+ void *maddr;
+
+ if (get_user_pages(NULL, mm, addr, 1, 0, 0, &page, NULL) <= 0)
+ break;
+
+ bytes = size;
+ offset = addr & (PAGE_SIZE - 1);
+ if (bytes > (PAGE_SIZE - offset))
+ bytes = PAGE_SIZE - offset;
+
+ maddr = kmap(page);
+ memcpy(pos, maddr + offset, bytes);
+ kunmap(page);
+ put_page(page);
+
+ size -= bytes;
+ pos += bytes;
+ addr += bytes;
+ }
+
+ if (pos == buf) {
+ *pos = '\0';
+ pos++;
+ } else if (*(pos - 1))
+ *(pos - 1) = '\0';
+ return pos - buf;
+}
+
+int mm_argv(struct mm_struct *mm, char *buf, int buflen)
+{
+ int argvlen;
+
+ down_read(&mm->mmap_sem);
+ argvlen = __mm_argv(mm, buf, buflen - 1);
+ up_read(&mm->mmap_sem);
+ buf[argvlen] = '\0';
+ return argvlen;
+}
+
+static char *__exe_path(struct mm_struct *mm, char *buf, int buflen)
+{
+ char *path = NULL;
+
+ if (mm->exe_file) {
+ struct vfsmount *mnt;
+ struct dentry *dentry;
+
+ mnt = mntget(mm->exe_file->f_path.mnt);
+ dentry = dget(mm->exe_file->f_path.dentry);
+
+ if (mnt && dentry) {
+ struct path _p = {mnt, dentry};
+
+ path = d_path(&_p, buf, buflen);
+ dput(dentry);
+ mntput(mnt);
+ }
+ }
+ return path;
+}
+
+char *mm_path(struct mm_struct *mm, char *buf, int buflen)
+{
+ char *path;
+
+ down_read(&mm->mmap_sem);
+ path = __exe_path(mm, buf, buflen);
+ up_read(&mm->mmap_sem);
+ return path;
+}
diff --git a/security/hone/hone_mmutil.h b/security/hone/hone_mmutil.h
new file mode 100644
index 0000000..321e7e6
--- /dev/null
+++ b/security/hone/hone_mmutil.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ */
+
+#ifndef _MMUTIL_H
+#define _MMUTIL_H
+
+#include <linux/mm_types.h>
+
+char *mm_path(struct mm_struct *mm, char *buf, int buflen);
+char *mm_path_old(struct mm_struct *mm, char *buf, int buflen);
+int mm_argv(struct mm_struct *mm, char *buf, int buflen);
+
+#endif /* _MMUTIL_H */
diff --git a/security/hone/hone_notify.c b/security/hone/hone_notify.c
new file mode 100644
index 0000000..08c2f8f
--- /dev/null
+++ b/security/hone/hone_notify.c
@@ -0,0 +1,450 @@
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/skbuff.h>
+#include <linux/cred.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/workqueue.h>
+#include <linux/uidgid.h>
+#include <net/sock.h>
+#include <linux/hone.h>
+
+#include "hone.h"
+
+/* Output */
+static RAW_NOTIFIER_HEAD(hone_notify_notifier_list);
+static DEFINE_RWLOCK(hone_notify_notifier_lock);
+
+/* Process list/Process lock. */
+static RAW_NOTIFIER_HEAD(hone_process_notifier_list);
+static DEFINE_RWLOCK(hone_process_notifier_lock);
+
+/* Socket list/Socket lock. */
+static RAW_NOTIFIER_HEAD(hone_socket_notifier_list);
+static DEFINE_RWLOCK(hone_socket_notifier_lock);
+
+/* Packet list/Packet lock. */
+static RAW_NOTIFIER_HEAD(hone_packet_notifier_list);
+static DEFINE_RWLOCK(hone_packet_notifier_lock);
+
+static struct kmem_cache *hone_cache;
+static struct kmem_cache *mmput_cache;
+static struct workqueue_struct *mmput_wq;
+struct delayed_mmput_struct {
+ struct work_struct ws;
+ struct mm_struct *mm;
+};
+
+static struct timespec start_time;
+static DEFINE_STATISTICS(hone_received);
+static DEFINE_STATISTICS(hone_dropped);
+
+#define copy_atomic64(dst, src) atomic64_set(&(dst), atomic64_read(&(src)))
+
+static void copy_statistics(const struct statistics *src,
+ struct statistics *dst)
+{
+ copy_atomic64(dst->process, src->process);
+ copy_atomic64(dst->socket, src->socket);
+ copy_atomic64(dst->packet, src->packet);
+}
+
+void get_hone_statistics(struct statistics *received,
+ struct statistics *dropped, struct timespec *ts)
+{
+ if (received)
+ copy_statistics(&hone_received, received);
+ if (dropped)
+ copy_statistics(&hone_dropped, dropped);
+ if (ts)
+ *ts = start_time;
+}
+
+#define notifier_call_chain_empty() \
+ (rcu_dereference(hone_notify_notifier_list.head) == NULL)
+
+static inline int hone_notifier_notify(struct hone_event *event)
+{
+ int result;
+ unsigned long flags;
+
+ read_lock_irqsave(&hone_notify_notifier_lock, flags);
+ result = raw_notifier_call_chain(&hone_notify_notifier_list, 0, event);
+ read_unlock_irqrestore(&hone_notify_notifier_lock, flags);
+ return result;
+}
+
+static void delayed_mmput(struct work_struct *work)
+{
+ struct delayed_mmput_struct *w = (struct delayed_mmput_struct *)work;
+
+ mmput(w->mm);
+ kmem_cache_free(mmput_cache, w);
+}
+
+static bool queue_mmput(struct mm_struct *mm)
+{
+ struct delayed_mmput_struct *delayed_mm =
+ kmem_cache_zalloc(mmput_cache, GFP_ATOMIC);
+
+ if (!delayed_mm)
+ return false;
+
+ delayed_mm->mm = mm;
+ INIT_WORK((struct work_struct *)delayed_mm,
+ delayed_mmput);
+
+ return queue_work(mmput_wq, (struct work_struct *)delayed_mm);
+}
+
+void free_hone_event(struct hone_event *event)
+{
+ if (event->type == HONE_PROCESS) {
+ if (event->process.mm) {
+ if (event->process.event == PROC_KTHD) {
+ kfree(event->process.comm);
+ } else {
+ if (unlikely(!queue_mmput(event->process.mm)))
+ BUG();
+ }
+ event->process.mm = NULL;
+ }
+ }
+ kmem_cache_free(hone_cache, event);
+}
+
+struct hone_event *alloc_hone_event(unsigned int type, gfp_t flags)
+{
+ struct hone_event *event;
+
+ event = kmem_cache_zalloc(hone_cache, flags);
+ if (!event)
+ return NULL;
+ event->type = type;
+ ktime_get_ts(&event->ts);
+ atomic_set(&event->users, 1);
+ return event;
+}
+
+struct hone_event *__alloc_process_event(
+ struct task_struct *task, int type, gfp_t flags)
+{
+ struct hone_event *event;
+
+ event = alloc_hone_event(HONE_PROCESS, flags);
+ if (event) {
+ struct process_event *pev = &event->process;
+ const struct cred *cred;
+
+ pev->event = (type != PROC_EXIT && task->flags & PF_KTHREAD) ?
+ PROC_KTHD : type;
+ if (unlikely(type == PROC_EXIT))
+ pev->retval = task->exit_code;
+ pev->pid = task->pid;
+ pev->ppid = task->real_parent->pid;
+ pev->tgid = task->tgid;
+ if (pev->event == PROC_KTHD) {
+ pev->comm = kstrndup(task->comm,
+ sizeof(task->comm), flags);
+ BUG_ON(unlikely(!pev->comm));
+ } else if (type == PROC_EXEC ||
+ (type == PROC_FORK && pev->ppid == 1)) {
+ pev->mm = get_task_mm(task);
+ BUG_ON(unlikely(!pev->mm));
+ }
+ pev->loginuid = __kuid_val(task->loginuid);
+ rcu_read_lock();
+ cred = __task_cred(task);
+ if (unlikely(!cred)) {
+ pev->uid = -1;
+ pev->euid = -1;
+ } else {
+ pev->uid = __kuid_val(cred->uid);
+ pev->euid = __kuid_val(cred->euid);
+ }
+ pev->gid = __kgid_val(cred->egid);
+ rcu_read_unlock();
+ }
+ return event;
+}
+
+int process_notifier_notify(unsigned long event, struct task_struct *task)
+{
+ int result;
+ unsigned long flags;
+
+ read_lock_irqsave(&hone_process_notifier_lock, flags);
+ result = raw_notifier_call_chain(&hone_process_notifier_list, event,
+ task);
+ read_unlock_irqrestore(&hone_process_notifier_lock, flags);
+ return result;
+}
+
+static int process_event_handler(struct notifier_block *nb,
+ unsigned long val, void *v)
+{
+ struct hone_event *event;
+
+ if (notifier_call_chain_empty())
+ return 0;
+
+ event = __alloc_process_event(v, val, GFP_ATOMIC);
+ if (event) {
+ atomic64_inc(&hone_received.process);
+ hone_notifier_notify(event);
+ put_hone_event(event);
+ } else {
+ atomic64_inc(&hone_dropped.process);
+ }
+ return 0;
+}
+
+static struct notifier_block process_nb = {
+ .notifier_call = process_event_handler,
+};
+
+/* Process sockets below here. */
+struct hone_event *__alloc_socket_event(unsigned long sock, int type,
+ struct task_struct *task, gfp_t flags)
+{
+ struct hone_event *event;
+
+ event = alloc_hone_event(HONE_SOCKET, flags);
+ if (event) {
+ struct socket_event *sockev = &event->socket;
+ const struct cred *cred;
+
+ /* Store pid with the socket */
+ ((struct sock *)sock)->sk_protinfo =
+ (void *)(unsigned long)task->pid;
+ sockev->sock = sock;
+ sockev->event = type;
+ sockev->pid = task->pid;
+ sockev->ppid = task->real_parent->pid;
+ sockev->tgid = task->tgid;
+ rcu_read_lock();
+ cred = __task_cred(task);
+ if (unlikely(!cred)) {
+ sockev->uid = -1;
+ sockev->gid = -1;
+ } else {
+ sockev->uid = __kuid_val(cred->euid);
+ sockev->gid = __kgid_val(cred->egid);
+ }
+ rcu_read_unlock();
+ }
+ return event;
+}
+
+static int socket_event_handler(struct notifier_block *nb,
+ unsigned long val, void *v)
+{
+ struct hone_event *event;
+
+ if (notifier_call_chain_empty())
+ return 0;
+ event = __alloc_socket_event((unsigned long) v, val, current,
+ GFP_ATOMIC);
+ if (event) {
+ atomic64_inc(&hone_received.socket);
+ hone_notifier_notify(event);
+ put_hone_event(event);
+ } else {
+ atomic64_inc(&hone_dropped.socket);
+ }
+ return 0;
+}
+
+static struct notifier_block socket_nb = {
+ .notifier_call = socket_event_handler,
+};
+
+int sock_notifier_register(struct notifier_block *nb)
+{
+ int result;
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_socket_notifier_lock, flags);
+ result = raw_notifier_chain_register(&hone_socket_notifier_list, nb);
+ write_unlock_irqrestore(&hone_socket_notifier_lock, flags);
+ return result;
+}
+
+int sock_notifier_unregister(struct notifier_block *nb)
+{
+ int result;
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_socket_notifier_lock, flags);
+ result = raw_notifier_chain_unregister(&hone_socket_notifier_list, nb);
+ write_unlock_irqrestore(&hone_socket_notifier_lock, flags);
+ return result;
+}
+
+inline int sock_notifier_notify(unsigned long event, struct sock *sk)
+{
+ int result;
+ unsigned long flags;
+
+ read_lock_irqsave(&hone_socket_notifier_lock, flags);
+ result = raw_notifier_call_chain(&hone_socket_notifier_list, event, sk);
+ read_unlock_irqrestore(&hone_socket_notifier_lock, flags);
+ return result;
+}
+
+static int packet_event_handler(struct notifier_block *nb,
+ unsigned long val, void *v)
+{
+ struct hone_event *event;
+
+ if (notifier_call_chain_empty())
+ return 0;
+
+ event = alloc_hone_event(HONE_PACKET, GFP_ATOMIC);
+ if (event) {
+ struct packet_args *args = (typeof(args)) v;
+
+ event->packet.sock = (unsigned long) args->sk;
+ event->packet.sk = args->sk;
+ event->packet.pid =
+ (unsigned long)(args->sk ? args->sk->sk_protinfo : 0);
+ event->packet.skb = skb_clone(args->skb, GFP_ATOMIC);
+ event->packet.dir = (val == PKTNOT_PACKET_IN);
+ atomic64_inc(&hone_received.packet);
+ hone_notifier_notify(event);
+ put_hone_event(event);
+ } else {
+ atomic64_inc(&hone_dropped.packet);
+ }
+ return 0;
+}
+
+static struct notifier_block packet_nb = {
+ .notifier_call = packet_event_handler,
+};
+
+int packet_notifier_register(struct notifier_block *nb)
+{
+ int result;
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_packet_notifier_lock, flags);
+ result = raw_notifier_chain_register(&hone_packet_notifier_list, nb);
+ write_unlock_irqrestore(&hone_packet_notifier_lock, flags);
+ return result;
+}
+
+int packet_notifier_unregister(struct notifier_block *nb)
+{
+ int result;
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_packet_notifier_lock, flags);
+ result = raw_notifier_chain_unregister(&hone_packet_notifier_list, nb);
+ write_unlock_irqrestore(&hone_packet_notifier_lock, flags);
+ return result;
+}
+
+int packet_notifier_notify(
+ unsigned long event, struct packet_args *pargs)
+{
+ int result;
+ unsigned long flags;
+
+ read_lock_irqsave(&hone_packet_notifier_lock, flags);
+ result = raw_notifier_call_chain(&hone_packet_notifier_list,
+ event, pargs);
+ read_unlock_irqrestore(&hone_packet_notifier_lock, flags);
+ return result;
+}
+
+void register_notifiers(void)
+{
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_process_notifier_lock, flags);
+ /* TODO(pmoody): check return values. */
+ raw_notifier_chain_register(&hone_process_notifier_list,
+ &process_nb);
+ raw_notifier_chain_register(&hone_socket_notifier_list,
+ &socket_nb);
+ raw_notifier_chain_register(&hone_packet_notifier_list,
+ &packet_nb);
+ write_unlock_irqrestore(&hone_process_notifier_lock, flags);
+}
+
+void unregister_notifiers(void)
+{
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_process_notifier_lock, flags);
+ /* TODO(pmoody): check return values. */
+ raw_notifier_chain_unregister(&hone_process_notifier_list,
+ &process_nb);
+ raw_notifier_chain_unregister(&hone_socket_notifier_list,
+ &socket_nb);
+ raw_notifier_chain_unregister(&hone_packet_notifier_list,
+ &packet_nb);
+ write_unlock_irqrestore(&hone_process_notifier_lock, flags);
+}
+
+int hone_notifier_register(struct notifier_block *nb)
+{
+ int result;
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_notify_notifier_lock, flags);
+ if (notifier_call_chain_empty())
+ register_notifiers();
+ result = raw_notifier_chain_register(&hone_notify_notifier_list, nb);
+ write_unlock_irqrestore(&hone_notify_notifier_lock, flags);
+ return result;
+}
+
+int hone_notifier_unregister(struct notifier_block *nb)
+{
+ int result;
+ unsigned long flags;
+
+ write_lock_irqsave(&hone_notify_notifier_lock, flags);
+ result = raw_notifier_chain_unregister(&hone_notify_notifier_list, nb);
+ if (notifier_call_chain_empty())
+ unregister_notifiers();
+ write_unlock_irqrestore(&hone_notify_notifier_lock, flags);
+ return result;
+}
+
+int __init hone_notify_init(void)
+{
+ int err = -ENOMEM;
+
+ hone_cache = kmem_cache_create(
+ "hone_event", sizeof(struct hone_event), 0, 0, NULL);
+ if (!hone_cache) {
+ pr_err("kmem_cache_create() failed\n");
+ goto out_hone_cache;
+ }
+
+ mmput_cache = kmem_cache_create(
+ "hone_delayed_mmput", sizeof(struct delayed_mmput_struct),
+ 0, 0, NULL);
+ if (!mmput_cache) {
+ pr_err("kmem_cache_create() failed on delayed_mm_cache\n");
+ goto out_mmput_cache;
+ }
+
+ mmput_wq = create_workqueue("hone_mmput");
+ if (!mmput_wq) {
+ err = -1;
+ goto out_workqueue;
+ }
+
+ return 0;
+
+out_workqueue:
+ kmem_cache_destroy(mmput_cache);
+out_mmput_cache:
+ kmem_cache_destroy(hone_cache);
+out_hone_cache:
+ return err;
+}
diff --git a/security/hone/hone_pcapng.c b/security/hone/hone_pcapng.c
new file mode 100644
index 0000000..0c5347c
--- /dev/null
+++ b/security/hone/hone_pcapng.c
@@ -0,0 +1,596 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ktime.h>
+#include <linux/time.h>
+#include <linux/types.h>
+#include <linux/rwsem.h>
+#include <linux/utsname.h>
+#include <linux/skbuff.h>
+#include <linux/hone.h>
+
+#include "hone.h"
+#include "hone_mmutil.h"
+
+#define PADLEN(x) (((x) & 0x3) ? 4 - ((x) & 3) : 0)
+#define OPT_SIZE(x) (((x) & 0x3) ? ((((x) >> 2) + 1) << 2) : x)
+#define block_set(BUF, TYPE, VAL) \
+ ({ *((TYPE*) (BUF)) = (VAL); sizeof(TYPE); })
+
+static unsigned int block_opt_ptr(char *buf,
+ uint16_t code, const void *ptr, unsigned int length)
+{
+ char *pos = buf;
+ unsigned int padlen = PADLEN(length);
+
+ pos += block_set(pos, uint16_t, code);
+ pos += block_set(pos, uint16_t, length);
+ if (ptr)
+ memcpy(pos, ptr, length);
+ pos += length;
+ memset(pos, 0, padlen);
+ pos += padlen;
+ return (unsigned int) (pos - buf);
+}
+
+#define block_opt_t(BUF, CODE, TYPE, VAL) ({ \
+ TYPE _value = (VAL); \
+ unsigned int _length = \
+ block_opt_ptr(BUF, CODE, &_value, \
+ sizeof(_value)); \
+ _length; })
+
+#define block_opt(BUF, CODE, VAL) block_opt_t(BUF, CODE, typeof(VAL), VAL)
+#define block_end_opt(BUF) block_opt_ptr(BUF, 0, NULL, 0)
+
+struct timestamp {
+ uint32_t ts_high;
+ uint32_t ts_low;
+};
+
+static void timespec_to_tstamp(struct timestamp *tstamp, struct timespec *ts)
+{
+ uint64_t val = (((uint64_t) ts->tv_sec) * 1000000LL) +
+ ts->tv_nsec / 1000;
+ tstamp->ts_high = val >> 32;
+ tstamp->ts_low = val & 0xFFFFFFFF;
+}
+
+/* Section Header Block {{{
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +---------------------------------------------------------------+
+ 0 | Block Type = 0x0A0D0D0A |
+ +---------------------------------------------------------------+
+ 4 | Block Total Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 8 | Byte-Order Magic |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+12 | Major Version | Minor Version |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+16 | |
+ | Section Length |
+ | |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+24 / /
+ / Options (variable) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Block Total Length |
+ +---------------------------------------------------------------+
+}}} */
+static unsigned int format_sechdr_block(const struct device_info *devinfo,
+ char *buf, unsigned int buflen)
+{
+ static const char *user_app = "Hone ";
+ char *pos = buf;
+ unsigned int *length_top, *length_end;
+ int n;
+
+ /* Be sure to update this value if fields are added below. */
+#define SECHDR_BLOCK_MIN_LEN 56
+ if (buflen < SECHDR_BLOCK_MIN_LEN)
+ return 0;
+ pos += block_set(pos, uint32_t, HONE_SECTION_HDR_BLOCK);
+ length_top = (typeof(length_top)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint32_t, 0x1A2B3C4D);
+ pos += block_set(pos, uint16_t, 1);
+ pos += block_set(pos, uint16_t, 0);
+ pos += block_set(pos, uint64_t, -1);
+
+ n = buflen - (pos - buf) - 16;
+ if (devinfo->host_id && n > 0) {
+ snprintf(pos + 4, n, "%c%s", 0, devinfo->host_id);
+ pos += block_opt_ptr(pos, 257, NULL, strlen(pos + 5) + 1);
+ } else if (devinfo->host_guid_is_set) {
+ memcpy(pos + 4, "\x01\x00\x00\x00", 4);
+ memcpy(pos + 8, &devinfo->host_guid,
+ sizeof(devinfo->host_guid));
+ pos += block_opt_ptr(pos, 257, NULL, 20);
+ }
+ n = buflen - (pos - buf) - 16;
+ if (n > 0) {
+ struct new_utsname *uname;
+
+ down_read(&uts_sem);
+ uname = utsname();
+ snprintf(pos + 4, n, "%s %s %s %s %s",
+ uname->sysname, uname->nodename, uname->release,
+ uname->version, uname->machine);
+ up_read(&uts_sem);
+ pos[n] = '\0';
+ pos += block_opt_ptr(pos, 3, NULL, strlen(pos + 4));
+ }
+ n = buflen - (pos - buf) - 16;
+ if (n > 0)
+ pos += block_opt_ptr(pos, 4, user_app,
+ min(n, (typeof(n)) strlen(user_app)));
+ n = buflen - (pos - buf) - 16;
+ if (devinfo->comment && n > 0) {
+ unsigned int i, j;
+
+ for (i = 0, j = 4; devinfo->comment[i] && j < n; i++, j++) {
+ if (devinfo->comment[i] == '\\' &&
+ (!strncmp(devinfo->comment + i + 1, "040", 3) ||
+ !strncmp(devinfo->comment + i + 1, "x20", 3))) {
+ pos[j] = ' ';
+ i += 3;
+ } else
+ pos[j] = devinfo->comment[i];
+ }
+ n = j - 4;
+ if (n)
+ pos += block_opt_ptr(pos, 1, NULL, n);
+ }
+ pos += block_end_opt(pos);
+ length_end = (typeof(length_end)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ *length_top = *length_end = (unsigned int) (pos - buf);
+ return *length_top;
+}
+
+/* Interface Description Block {{{
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +---------------------------------------------------------------+
+ 0 | Block Type = 0x00000001 |
+ +---------------------------------------------------------------+
+ 4 | Block Total Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 8 | LinkType | Reserved |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+12 | SnapLen |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+16 / /
+ / Options (variable) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Block Total Length |
+ +---------------------------------------------------------------+
+}}} */
+static unsigned int format_ifdesc_block(const struct reader_info *info,
+ char *buf, int buflen)
+{
+ static const char *if_desc = "Hone Capture Pseudo-device";
+ char *pos = buf;
+ unsigned int *length_top, *length_end;
+
+ /* Be sure to update this value if fields are added below. */
+#define IFDESC_BLOCK_MIN_LEN 56
+ if (buflen < IFDESC_BLOCK_MIN_LEN)
+ return 0;
+ pos += block_set(pos, uint32_t, HONE_IF_DESC_BLOCK);
+ length_top = (typeof(length_top)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint16_t, 101);
+ pos += block_set(pos, uint16_t, 0);
+ pos += block_set(pos, uint32_t, info->snaplen);
+ pos += block_opt_ptr(pos, 3, if_desc,
+ strlen(if_desc));
+ pos += block_end_opt(pos);
+ length_end = (typeof(length_end)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ *length_top = *length_end = (unsigned int) (pos - buf);
+ return *length_top;
+}
+
+/* Interface Statistics Block {{{
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +---------------------------------------------------------------+
+ 0 | Block Type = 0x00000005 |
+ +---------------------------------------------------------------+
+ 4 | Block Total Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 8 | Interface ID |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+12 | Timestamp (High) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+16 | Timestamp (Low) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+20 / /
+ / Options (variable) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Block Total Length |
+ +---------------------------------------------------------------+
+}}} */
+static unsigned int format_ifstats_block(const struct reader_info *info,
+ char *buf, int buflen)
+{
+ char *pos = buf;
+ unsigned int *length_top, *length_end;
+ struct timespec ts;
+ struct timestamp tstamp, start_time;
+ struct statistics received, dropped;
+
+ get_hone_statistics(&received, &dropped, &ts);
+ set_normalized_timespec(&ts, info->boot_time.tv_sec + ts.tv_sec,
+ info->boot_time.tv_nsec + ts.tv_nsec);
+ timespec_to_tstamp(&start_time, &ts);
+ ktime_get_ts(&ts);
+ set_normalized_timespec(&ts, info->boot_time.tv_sec + ts.tv_sec,
+ info->boot_time.tv_nsec + ts.tv_nsec);
+ timespec_to_tstamp(&tstamp, &ts);
+
+ /* Be sure to update this value if fields are added below. */
+#define IFSTATS_BLOCK_MIN_LEN 196
+ if (buflen < IFSTATS_BLOCK_MIN_LEN)
+ return 0;
+ pos += block_set(pos, uint32_t, HONE_IF_STATS_BLOCK);
+ length_top = (typeof(length_top)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, struct timestamp, tstamp);
+ pos += block_opt_t(pos, 2, struct timestamp, start_time);
+ pos += block_opt_t(pos, 4, uint64_t, atomic64_read(&received.packet));
+ pos += block_opt_t(pos, 5, uint64_t, atomic64_read(&dropped.packet));
+ pos += block_opt_t(pos, 6, uint64_t, atomic64_read(&info->filtered));
+ pos += block_opt_t(pos, 7, uint64_t, atomic64_read(&info->dropped.packet));
+ pos += block_opt_t(pos, 8, uint64_t, atomic64_read(&info->delivered.packet));
+ pos += block_opt_t(pos, 257, uint64_t, atomic64_read(&received.process));
+ pos += block_opt_t(pos, 258, uint64_t, atomic64_read(&dropped.process));
+ pos += block_opt_t(pos, 259, uint64_t, atomic64_read(&info->dropped.process));
+ pos += block_opt_t(pos, 260, uint64_t, atomic64_read(&info->delivered.process));
+ pos += block_opt_t(pos, 261, uint64_t, atomic64_read(&received.socket));
+ pos += block_opt_t(pos, 262, uint64_t, atomic64_read(&dropped.socket));
+ pos += block_opt_t(pos, 263, uint64_t, atomic64_read(&info->dropped.socket));
+ pos += block_opt_t(pos, 264, uint64_t, atomic64_read(&info->delivered.socket));
+ pos += block_end_opt(pos);
+ length_end = (typeof(length_end)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ *length_top = *length_end = (unsigned int) (pos - buf);
+ return *length_top;
+}
+
+static inline unsigned int maxoptlen(int buflen, unsigned int length)
+{
+ unsigned int alignlen = ((buflen - 16) >> 2) << 2;
+
+ if (unlikely(buflen < 0))
+ return 0;
+ return alignlen < length ? alignlen : length;
+}
+
+/* Process Event Block {{{
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +---------------------------------------------------------------+
+ 0 | Block Type = 0x00000101 |
+ +---------------------------------------------------------------+
+ 4 | Block Total Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 8 | Process ID |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+12 | Timestamp (High) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+16 | Timestamp (Low) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+20 / /
+ / Options (variable) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Block Total Length |
+ +---------------------------------------------------------------+
+}}} */
+static size_t format_process_block(struct process_event *event,
+ struct timestamp *tstamp, char *buf, size_t buflen)
+{
+ static const uint32_t event_map[] = {0, 1, 0, -1, 2};
+ char *pos = buf;
+ unsigned int *length_top, *length_end;
+
+ /* Be sure to update this value if fields are added below. */
+#define PROCESS_BLOCK_MIN_LEN 56
+ if (buflen < PROCESS_BLOCK_MIN_LEN)
+ return 0;
+ pos += block_set(pos, uint32_t, HONE_PROCESS_BLOCK);
+ length_top = (typeof(length_top)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint32_t, event->tgid);
+ pos += block_set(pos, struct timestamp, *tstamp);
+ if (event->event != PROC_EXEC)
+ pos += block_opt_t(pos, 2, uint32_t, event_map[event->event]);
+ pos += block_opt_t(pos, 5, uint32_t, event->ppid);
+ pos += block_opt_t(pos, 6, uint32_t, event->uid);
+ pos += block_opt_t(pos, 8, uint32_t, event->euid);
+ pos += block_opt_t(pos, 9, uint32_t, event->loginuid);
+ pos += block_opt_t(pos, 7, uint32_t, event->gid);
+ if (event->mm) {
+ char *tmp, *ptr;
+ unsigned int n, length;
+
+ ptr = pos + 4;
+ length = buflen - (pos - buf) - 16;
+ if (event->event == PROC_KTHD) {
+ n = strlen(event->comm);
+ length = maxoptlen(length, n + 2);
+ if (length) {
+ ptr[0] = '[';
+ if (length > 1)
+ memcpy(ptr + 1, event->comm,
+ length - 1);
+ if (length > n + 1)
+ ptr[length - 1] = ']';
+ pos += block_opt_ptr(pos, 3, NULL, length);
+ }
+ } else {
+ if (length > 0) {
+ tmp = mm_path(event->mm, ptr, length);
+ if (tmp) {
+ length = maxoptlen(length, strlen(tmp));
+ if (length) {
+ memmove(ptr, tmp, length);
+ pos += block_opt_ptr(pos, 3,
+ NULL, length);
+ }
+ }
+ }
+ ptr = pos + 4;
+ length = buflen - (pos - buf) - 16;
+ if (length > 0) {
+ n = mm_argv(event->mm, ptr, length);
+ if (n)
+ pos += block_opt_ptr(pos, 4, NULL,
+ maxoptlen(length, n));
+ }
+ }
+ }
+ pos += block_end_opt(pos);
+ length_end = (typeof(length_end)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ *length_top = *length_end = (unsigned int) (pos - buf);
+ return *length_top;
+}
+
+/* Connection Event Block {{{
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +---------------------------------------------------------------+
+ 0 | Block Type = 0x00000102 |
+ +---------------------------------------------------------------+
+ 4 | Block Total Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 8 | Connection ID |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+12 | Process ID |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+16 | Timestamp (High) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+20 | Timestamp (Low) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+24 / /
+ / Options (variable) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Block Total Length |
+ +---------------------------------------------------------------+
+}}} */
+static size_t format_connection_block(struct socket_event *event,
+ struct timestamp *tstamp, char *buf, size_t buflen)
+{
+ char *pos = buf;
+ unsigned int *length_top, *length_end;
+
+ /* Be sure to update this value if fields are added below. */
+#define CONNECTION_BLOCK_MIN_LEN 40
+ if (buflen < CONNECTION_BLOCK_MIN_LEN)
+ return 0;
+ pos += block_set(pos, uint32_t, HONE_CONNECTION_BLOCK);
+ length_top = (typeof(length_top)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint32_t,
+ event->sock & 0xFFFFFFFF);
+ pos += block_set(pos, uint32_t, event->tgid);
+ pos += block_set(pos, struct timestamp, *tstamp);
+ if (event->event) {
+ pos += block_opt_t(pos, 2, uint32_t, -1);
+ pos += block_end_opt(pos);
+ }
+ length_end = (typeof(length_end)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ *length_top = *length_end = (unsigned int) (pos - buf);
+ return *length_top;
+}
+
+/* Enhanced Packet Block {{{
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +---------------------------------------------------------------+
+ 0 | Block Type = 0x00000006 |
+ +---------------------------------------------------------------+
+ 4 | Block Total Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ 8 | Interface ID |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+12 | Timestamp (High) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+16 | Timestamp (Low) |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+20 | Captured Len |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+24 | Packet Len |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+28 / /
+ / Packet Data /
+ / ( variable length, aligned to 32 bits ) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ / /
+ / Options (variable) /
+ / /
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Block Total Length |
+ +---------------------------------------------------------------+
+}}} */
+static size_t format_packet_block(struct packet_event *event,
+ unsigned int snaplen,
+ struct timestamp *tstamp,
+ char *buf, size_t buflen)
+{
+ char *pos = buf;
+ int offset;
+ unsigned int *length_top, *length_end, *length_cap, offlen;
+ struct sk_buff *skb = event->skb;
+
+ /* Be sure to update this value if fields are added below. */
+#define PACKET_BLOCK_MIN_LEN 52
+ if (buflen < PACKET_BLOCK_MIN_LEN)
+ return 0;
+ pos += block_set(pos, uint32_t, HONE_PACKET_BLOCK);
+ length_top = (typeof(length_top)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, struct timestamp, *tstamp);
+ length_cap = (typeof(length_cap)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ pos += block_set(pos, uint32_t, event->len);
+
+ /* packet data */
+ offset = skb_network_header(skb) - skb->data;
+ offlen = snaplen ? min(skb->len - offset, snaplen) : skb->len - offset;
+ *length_cap = maxoptlen(buflen - (pos - buf), offlen);
+ if (*length_cap) {
+ unsigned int n = *length_cap & 3 ? 4 - (*length_cap & 3) : 0;
+
+ if (skb_copy_bits(skb, offset, pos, *length_cap))
+ BUG();
+ pos += *length_cap;
+ memset(pos, 0, n);
+ pos += n;
+ }
+
+ if (event->sock)
+ pos += block_opt_t(pos, 257, uint32_t,
+ event->sock & 0xFFFFFFFF);
+ if (event->pid)
+ pos += block_opt_t(pos, 258, uint32_t, event->pid);
+ pos += block_opt_t(pos, 2, uint32_t, event->dir ? 1 : 2);
+ pos += block_end_opt(pos);
+ length_end = (typeof(length_end)) pos;
+ pos += block_set(pos, uint32_t, 0);
+ *length_top = *length_end = (unsigned int) (pos - buf);
+ return *length_top;
+}
+
+static void normalize_ts(struct timestamp *tstamp,
+ const struct timespec *boot_time,
+ const struct timespec *event_time)
+{
+ struct timespec ts;
+
+ /* The following is used instead of timespec_add()
+ because it doesn't exist in older kernel versions. */
+ set_normalized_timespec(&ts, boot_time->tv_sec + event_time->tv_sec,
+ boot_time->tv_nsec + event_time->tv_nsec);
+ timespec_to_tstamp(tstamp, &ts);
+}
+
+unsigned int format_as_pcapng(
+ const struct device_info *devinfo, const struct reader_info *info,
+ struct hone_event *event, char *buf, unsigned int buflen)
+{
+ unsigned int n = 0;
+ struct timestamp tstamp;
+
+ switch (event->type) {
+ case HONE_PACKET:
+ normalize_ts(&tstamp, &info->boot_time, &event->ts);
+ n = format_packet_block(
+ &event->packet, info->snaplen, &tstamp, buf, buflen);
+ break;
+ case HONE_PROCESS:
+ normalize_ts(&tstamp, &info->boot_time, &event->ts);
+ n = format_process_block(&event->process, &tstamp, buf, buflen);
+ break;
+ case HONE_SOCKET:
+ normalize_ts(&tstamp, &info->boot_time, &event->ts);
+ n = format_connection_block(&event->socket, &tstamp,
+ buf, buflen);
+ break;
+ case HONE_USER_HEAD:
+ n = format_sechdr_block(devinfo, buf, buflen);
+ n += format_ifdesc_block(info, buf + n, buflen - n);
+ break;
+ case HONE_USER_TAIL:
+ n = format_ifstats_block(info, buf + n, buflen - n);
+ break;
+ }
+
+ return n;
+}
+
+int parse_guid(struct guid_struct *guid, const char *input)
+{
+ int i, val;
+ const char *pos = input;
+ char *buf = (typeof(buf)) guid;
+
+ if (*pos == '{')
+ pos++;
+ for (i = 0; *pos && i < 32; pos++) {
+ if (*pos == '-') {
+ if (pos == input)
+ return -1;
+ continue;
+ }
+ if (*pos >= '0' && *pos <= '9')
+ val = *pos - '0';
+ else if (*pos >= 'a' && *pos <= 'f')
+ val = *pos - 'W';
+ else if (*pos >= 'A' && *pos <= 'F')
+ val = *pos - '7';
+ else
+ return -1;
+ if (i % 2) {
+ buf[i / 2] += val;
+ i++;
+ } else {
+ buf[i / 2] = val << 4;
+ i++;
+ }
+ }
+ if (i < 32)
+ return -1;
+ if (*input == '{') {
+ if (*pos != '}')
+ return -1;
+ pos++;
+ }
+ if (*pos)
+ return -1;
+ guid->data1 = ntohl(guid->data1);
+ guid->data2 = ntohs(guid->data2);
+ guid->data3 = ntohs(guid->data3);
+ return 0;
+}
diff --git a/security/hone/hone_pcapng.h b/security/hone/hone_pcapng.h
new file mode 100644
index 0000000..2987831c
--- /dev/null
+++ b/security/hone/hone_pcapng.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ */
+
+#ifndef _PCAPNG_H
+#define _PCAPNG_H
+
+#include <linux/atomic.h>
+#include <linux/time.h>
+
+#define HONE_USER_HEAD (HONE_USER | 1)
+#define HONE_USER_TAIL (HONE_USER | 2)
+
+#define GUID_FMT "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x"
+#define GUID_TUPLE(G) (G)->data1, (G)->data2, (G)->data3, \
+ (G)->data4[0], (G)->data4[1], (G)->data4[2], (G)->data4[3], \
+ (G)->data4[4], (G)->data4[5], (G)->data4[6], (G)->data4[7]
+
+unsigned int format_as_pcapng(
+ const struct device_info *devinfo, const struct reader_info *info,
+ struct hone_event *event, char *buf, unsigned int buflen);
+int parse_guid(struct guid_struct *guid, const char *input);
+
+#endif /* _PCAPNG_H */
diff --git a/security/hone/hone_ringbuf.c b/security/hone/hone_ringbuf.c
new file mode 100644
index 0000000..14a38f8
--- /dev/null
+++ b/security/hone/hone_ringbuf.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ *
+ * Implementation of lock-free ring buffer.
+ */
+
+#include <linux/atomic.h>
+
+#include "hone_ringbuf.h"
+
+int ring_append(struct ring_buf *ring, void *elem)
+{
+ unsigned int back;
+
+ for (;;) {
+ back = ring_back(ring);
+ if (back - ring_front(ring) >= ring->length)
+ return -1;
+ if ((unsigned int)
+ atomic_cmpxchg(&ring->back, back, back + 1) == back)
+ break;
+ }
+ ring->data[back % ring->length] = elem;
+ return 0;
+}
+
+void *ring_pop(struct ring_buf *ring)
+{
+ void *elem, **slot;
+ unsigned int front;
+
+ for (;;) {
+ front = ring_front(ring);
+ if (front == ring_back(ring))
+ return NULL;
+ slot = ring->data + (front % ring->length);
+ elem = *slot;
+ if (!elem)
+ continue;
+ if (cmpxchg(slot, elem, NULL) == elem)
+ break;
+ }
+ atomic_inc(&ring->front);
+ return elem;
+}
diff --git a/security/hone/hone_ringbuf.h b/security/hone/hone_ringbuf.h
new file mode 100644
index 0000000..a12311c
--- /dev/null
+++ b/security/hone/hone_ringbuf.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ *
+ * Implementation of lock-free ring buffer.
+ */
+
+#ifndef _RINGBUF_H
+#define _RINGBUF_H
+
+#include <linux/types.h>
+
+struct ring_buf {
+ atomic_t front;
+ atomic_t back;
+ unsigned int length;
+ unsigned int pageorder;
+ void **data;
+};
+
+#define ring_front(ring) ((unsigned int) atomic_read(&(ring)->front))
+#define ring_back(ring) ((unsigned int) atomic_read(&(ring)->back))
+#define ring_used(ring) (ring_back(ring) - ring_front(ring))
+#define ring_is_empty(ring) (ring_front(ring) == ring_back(ring))
+
+int ring_append(struct ring_buf *ring, void *elem);
+void *ring_pop(struct ring_buf *ring);
+
+#endif /* _RINGBUF_H */
diff --git a/security/hone/hone_socket_lookup.c b/security/hone/hone_socket_lookup.c
new file mode 100644
index 0000000..6b0f355
--- /dev/null
+++ b/security/hone/hone_socket_lookup.c
@@ -0,0 +1,264 @@
+/*
+ * Modifications copyright (C) 2011 Battelle Memorial Institute
+ *
+ * Licensed under the GNU General Public License Version 2.
+ * See LICENSE for the full text of the license.
+ * See DISCLAIMER for additional disclaimers.
+ *
+ * Author: Brandon Carpenter
+ */
+
+/*
+ * The following code was conveniently borrowed form the xt_socket
+ * iptables module and used with minor modifications. Thanks guys!
+ *
+ * Transparent proxy support for Linux/iptables
+ *
+ * Copyright (C) 2007-2008 BalaBit IT Ltd.
+ * Author: Krisztian Kovacs
+ */
+
+#include <linux/version.h>
+#include <linux/skbuff.h>
+#include <net/tcp.h>
+#include <net/udp.h>
+#include <net/icmp.h>
+#include <net/sock.h>
+#include <net/inet_sock.h>
+
+#include "hone.h"
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+#include <net/ipv6.h>
+#include <net/inet6_hashtables.h>
+#endif
+
+#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#define XT_SOCKET_HAVE_CONNTRACK 1
+#include <net/netfilter/nf_conntrack.h>
+#endif
+
+static int extract_icmp4_fields(const struct sk_buff *skb, u8 *protocol,
+ __be32 *raddr, __be32 *laddr, __be16 *rport, __be16 *lport)
+{
+ unsigned int outside_hdrlen = ip_hdrlen(skb);
+ struct iphdr *inside_iph, _inside_iph;
+ struct icmphdr *icmph, _icmph;
+ __be16 *ports, _ports[2];
+
+ icmph = skb_header_pointer(skb, outside_hdrlen,
+ sizeof(_icmph), &_icmph);
+ if (icmph == NULL)
+ return 1;
+
+ switch (icmph->type) {
+ case ICMP_DEST_UNREACH:
+ case ICMP_SOURCE_QUENCH:
+ case ICMP_REDIRECT:
+ case ICMP_TIME_EXCEEDED:
+ case ICMP_PARAMETERPROB:
+ break;
+ default:
+ return 1;
+ }
+
+ inside_iph = skb_header_pointer(skb, outside_hdrlen +
+ sizeof(struct icmphdr),
+ sizeof(_inside_iph), &_inside_iph);
+ if (inside_iph == NULL)
+ return 1;
+
+ if (inside_iph->protocol != IPPROTO_TCP &&
+ inside_iph->protocol != IPPROTO_UDP)
+ return 1;
+
+ ports = skb_header_pointer(skb, outside_hdrlen +
+ sizeof(struct icmphdr) +
+ (inside_iph->ihl << 2),
+ sizeof(_ports), &_ports);
+ if (ports == NULL)
+ return 1;
+
+ /* the inside IP packet is the one quoted from our side, thus
+ * its saddr is the local address */
+ *protocol = inside_iph->protocol;
+ *laddr = inside_iph->saddr;
+ *lport = ports[0];
+ *raddr = inside_iph->daddr;
+ *rport = ports[1];
+
+ return 0;
+}
+
+struct sock *lookup_v4_sock(const struct sk_buff *skb,
+ const struct net_device *indev)
+{
+ struct iphdr *iph = ip_hdr(skb);
+ struct sock *sk;
+ __be32 daddr = 0, saddr = 0;
+ __be16 dport = 0, sport = 0;
+ u8 protocol = 0;
+
+ if (iph->protocol == IPPROTO_UDP || iph->protocol == IPPROTO_TCP) {
+ struct udphdr _hdr, *hp;
+
+ hp = skb_header_pointer(skb, ip_hdrlen(skb),
+ sizeof(_hdr), &_hdr);
+ if (!hp)
+ return NULL;
+
+ protocol = iph->protocol;
+ saddr = iph->saddr;
+ sport = hp->source;
+ daddr = iph->daddr;
+ dport = hp->dest;
+
+ } else if (iph->protocol == IPPROTO_ICMP) {
+ if (extract_icmp4_fields(skb, &protocol, &saddr, &daddr,
+ &sport, &dport))
+ return NULL;
+ } else {
+ return NULL;
+ }
+
+#ifdef XT_SOCKET_HAVE_CONNTRACK
+ /* Do the lookup with the original socket address in case this is a
+ * reply packet of an established SNAT-ted connection. */
+ {
+ enum ip_conntrack_info ctinfo;
+ struct nf_conn const *ct = nf_ct_get(skb, &ctinfo);
+
+ if (ct && !nf_ct_is_untracked(ct) &&
+ ((iph->protocol != IPPROTO_ICMP &&
+ ctinfo == IP_CT_IS_REPLY + IP_CT_ESTABLISHED) ||
+ (iph->protocol == IPPROTO_ICMP &&
+ ctinfo == IP_CT_IS_REPLY + IP_CT_RELATED)) &&
+ (ct->status & IPS_SRC_NAT_DONE)) {
+
+ daddr = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip;
+ dport = (iph->protocol == IPPROTO_TCP) ?
+ ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.tcp.port :
+ ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u.udp.port;
+ }
+ }
+#endif
+
+ if (protocol == IPPROTO_TCP)
+ sk = __inet_lookup(dev_net(skb->dev), &tcp_hashinfo,
+ saddr, sport, daddr, dport, indev->ifindex);
+ else
+ sk = udp4_lib_lookup(dev_net(skb->dev),
+ saddr, sport, daddr, dport, indev->ifindex);
+ if (!sk)
+ return NULL;
+
+ /* Ignore sockets listening on INADDR_ANY */
+ if (sk->sk_state != TCP_TIME_WAIT && inet_sk(sk)->inet_rcv_saddr == 0) {
+ put_sock(sk);
+ return NULL;
+ }
+ return sk;
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static int extract_icmp6_fields(const struct sk_buff *skb,
+ unsigned int outside_hdrlen, int *protocol,
+ struct in6_addr **raddr,
+ struct in6_addr **laddr, __be16 *rport,
+ __be16 *lport)
+{
+ struct ipv6hdr *inside_iph, _inside_iph;
+ struct icmp6hdr *icmph, _icmph;
+ __be16 *ports, _ports[2], _ignore;
+ u8 inside_nexthdr;
+ int inside_hdrlen;
+
+ icmph = skb_header_pointer(skb, outside_hdrlen, sizeof(_icmph),
+ &_icmph);
+ if (!icmph)
+ return 1;
+ if (icmph->icmp6_type & ICMPV6_INFOMSG_MASK)
+ return 1;
+
+ inside_iph = skb_header_pointer(
+ skb, outside_hdrlen + sizeof(_icmph), sizeof(_inside_iph),
+ &_inside_iph);
+ if (!inside_iph)
+ return 1;
+
+ inside_nexthdr = inside_iph->nexthdr;
+ inside_hdrlen = ipv6_skip_exthdr(
+ skb, outside_hdrlen + sizeof(_icmph) + sizeof(_inside_iph),
+ &inside_nexthdr, &_ignore);
+ if (inside_hdrlen < 0)
+ /* hjm: Packet has no/incomplete transport layer headers. */
+ return 1;
+ if (inside_nexthdr != IPPROTO_TCP && inside_nexthdr != IPPROTO_UDP)
+ return 1;
+
+ ports = skb_header_pointer(skb, inside_hdrlen, sizeof(_ports), &_ports);
+ if (!ports)
+ return 1;
+
+ /* the inside IP packet is the one quoted from our side, thus
+ * its saddr is the local address */
+ *protocol = inside_nexthdr;
+ *laddr = &inside_iph->saddr;
+ *lport = ports[0];
+ *raddr = &inside_iph->daddr;
+ *rport = ports[1];
+
+ return 0;
+}
+
+struct sock *lookup_v6_sock(const struct sk_buff *skb,
+ const struct net_device *indev)
+{
+ struct sock *sk;
+ struct in6_addr *daddr, *saddr;
+ __be16 dport, sport;
+ int thoff = 0, tproto;
+
+ tproto = ipv6_find_hdr(skb, &thoff, -1, NULL, NULL);
+ if (tproto < 0)
+ /* unable to find transport header in IPv6 packet */
+ return NULL;
+
+ if (tproto == IPPROTO_UDP || tproto == IPPROTO_TCP) {
+ struct udphdr _hdr, *hp;
+ struct ipv6hdr *iph;
+
+ hp = skb_header_pointer(skb, thoff, sizeof(_hdr), &_hdr);
+ if (!hp)
+ return NULL;
+
+ iph = ipv6_hdr(skb);
+ saddr = &iph->saddr;
+ sport = hp->source;
+ daddr = &iph->daddr;
+ dport = hp->dest;
+ } else if (tproto == IPPROTO_ICMPV6) {
+ if (extract_icmp6_fields(skb, thoff, &tproto,
+ &saddr, &daddr, &sport, &dport))
+ return NULL;
+ } else {
+ return NULL;
+ }
+
+ if (tproto == IPPROTO_TCP)
+ sk = inet6_lookup(dev_net(skb->dev), &tcp_hashinfo,
+ saddr, sport, daddr, dport, indev->ifindex);
+ else
+ sk = __udp6_lib_lookup(dev_net(skb->dev),
+ saddr, sport, daddr, dport, indev->ifindex,
+ &udp_table);
+
+ /* Ignore sockets listening on INADDR_ANY */
+ if (sk && sk->sk_state != TCP_TIME_WAIT && !inet_sk(sk)->inet_rcv_saddr) {
+ put_sock(sk);
+ return NULL;
+ }
+ /* TODO(pmoody): add pid information here. */
+ return sk;
+}
+#endif
--
2.0.0.526.g5318336
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