TOMOYO: Add socket operation restriction support.

This patch adds support for permission checks for PF_INET/PF_INET6/PF_UNIX
socket's bind()/listen()/connect()/send() operations.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

10 files changed, 1215 insertions, 17 deletions

diff --git a/security/tomoyo/Kconfig b/security/tomoyo/Kconfig
index 7c7f8c16c10f..8eb779b9d77f 100644
--- a/security/tomoyo/Kconfig
+++ b/security/tomoyo/Kconfig
@@ -1,8 +1,10 @@
 config SECURITY_TOMOYO
 	bool "TOMOYO Linux Support"
 	depends on SECURITY
+	depends on NET
 	select SECURITYFS
 	select SECURITY_PATH
+	select SECURITY_NETWORK
 	default n
 	help
 	  This selects TOMOYO Linux, pathname-based access control.
diff --git a/security/tomoyo/Makefile b/security/tomoyo/Makefile
index f7ade960f6cf..fc2a8ce40301 100644
--- a/security/tomoyo/Makefile
+++ b/security/tomoyo/Makefile
@@ -1,4 +1,4 @@
-obj-y = audit.o common.o condition.o domain.o environ.o file.o gc.o group.o load_policy.o memory.o mount.o realpath.o securityfs_if.o tomoyo.o util.o
+obj-y = audit.o common.o condition.o domain.o environ.o file.o gc.o group.o load_policy.o memory.o mount.o network.o realpath.o securityfs_if.o tomoyo.o util.o
 
 $(obj)/policy/profile.conf:
 	@mkdir -p $(obj)/policy/
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index d116e1ece3e6..85d915587a71 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -44,10 +44,27 @@ const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
 	[TOMOYO_MAC_FILE_MOUNT]      = "mount",
 	[TOMOYO_MAC_FILE_UMOUNT]     = "unmount",
 	[TOMOYO_MAC_FILE_PIVOT_ROOT] = "pivot_root",
+	/* CONFIG::network group */
+	[TOMOYO_MAC_NETWORK_INET_STREAM_BIND]       = "inet_stream_bind",
+	[TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN]     = "inet_stream_listen",
+	[TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT]    = "inet_stream_connect",
+	[TOMOYO_MAC_NETWORK_INET_DGRAM_BIND]        = "inet_dgram_bind",
+	[TOMOYO_MAC_NETWORK_INET_DGRAM_SEND]        = "inet_dgram_send",
+	[TOMOYO_MAC_NETWORK_INET_RAW_BIND]          = "inet_raw_bind",
+	[TOMOYO_MAC_NETWORK_INET_RAW_SEND]          = "inet_raw_send",
+	[TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND]       = "unix_stream_bind",
+	[TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN]     = "unix_stream_listen",
+	[TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT]    = "unix_stream_connect",
+	[TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND]        = "unix_dgram_bind",
+	[TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND]        = "unix_dgram_send",
+	[TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND]    = "unix_seqpacket_bind",
+	[TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN]  = "unix_seqpacket_listen",
+	[TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT] = "unix_seqpacket_connect",
 	/* CONFIG::misc group */
 	[TOMOYO_MAC_ENVIRON] = "env",
 	/* CONFIG group */
 	[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_FILE] = "file",
+	[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_NETWORK] = "network",
 	[TOMOYO_MAX_MAC_INDEX + TOMOYO_MAC_CATEGORY_MISC] = "misc",
 };
 
@@ -135,11 +152,20 @@ const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION] = {
 	[TOMOYO_TYPE_UMOUNT]     = "unmount",
 };
 
+/* String table for socket's operation. */
+const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION] = {
+	[TOMOYO_NETWORK_BIND]    = "bind",
+	[TOMOYO_NETWORK_LISTEN]  = "listen",
+	[TOMOYO_NETWORK_CONNECT] = "connect",
+	[TOMOYO_NETWORK_SEND]    = "send",
+};
+
 /* String table for categories. */
 static const char * const tomoyo_category_keywords
 [TOMOYO_MAX_MAC_CATEGORY_INDEX] = {
-	[TOMOYO_MAC_CATEGORY_FILE] = "file",
-	[TOMOYO_MAC_CATEGORY_MISC] = "misc",
+	[TOMOYO_MAC_CATEGORY_FILE]    = "file",
+	[TOMOYO_MAC_CATEGORY_NETWORK] = "network",
+	[TOMOYO_MAC_CATEGORY_MISC]    = "misc",
 };
 
 /* Permit policy management by non-root user? */
@@ -1042,8 +1068,10 @@ static int tomoyo_write_domain2(struct tomoyo_policy_namespace *ns,
 	static const struct {
 		const char *keyword;
 		int (*write) (struct tomoyo_acl_param *);
-	} tomoyo_callback[2] = {
+	} tomoyo_callback[4] = {
 		{ "file ", tomoyo_write_file },
+		{ "network inet ", tomoyo_write_inet_network },
+		{ "network unix ", tomoyo_write_unix_network },
 		{ "misc ", tomoyo_write_misc },
 	};
 	u8 i;
@@ -1375,6 +1403,60 @@ static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
 		tomoyo_print_number_union(head, &ptr->mode);
 		tomoyo_print_number_union(head, &ptr->major);
 		tomoyo_print_number_union(head, &ptr->minor);
+	} else if (acl_type == TOMOYO_TYPE_INET_ACL) {
+		struct tomoyo_inet_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		const u8 perm = ptr->perm;
+
+		for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
+			if (!(perm & (1 << bit)))
+				continue;
+			if (first) {
+				tomoyo_set_group(head, "network inet ");
+				tomoyo_set_string(head, tomoyo_proto_keyword
+						  [ptr->protocol]);
+				tomoyo_set_space(head);
+				first = false;
+			} else {
+				tomoyo_set_slash(head);
+			}
+			tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
+		}
+		if (first)
+			return true;
+		tomoyo_set_space(head);
+		if (ptr->address.group) {
+			tomoyo_set_string(head, "@");
+			tomoyo_set_string(head, ptr->address.group->group_name
+					  ->name);
+		} else {
+			char buf[128];
+			tomoyo_print_ip(buf, sizeof(buf), &ptr->address);
+			tomoyo_io_printf(head, "%s", buf);
+		}
+		tomoyo_print_number_union(head, &ptr->port);
+	} else if (acl_type == TOMOYO_TYPE_UNIX_ACL) {
+		struct tomoyo_unix_acl *ptr =
+			container_of(acl, typeof(*ptr), head);
+		const u8 perm = ptr->perm;
+
+		for (bit = 0; bit < TOMOYO_MAX_NETWORK_OPERATION; bit++) {
+			if (!(perm & (1 << bit)))
+				continue;
+			if (first) {
+				tomoyo_set_group(head, "network unix ");
+				tomoyo_set_string(head, tomoyo_proto_keyword
+						  [ptr->protocol]);
+				tomoyo_set_space(head);
+				first = false;
+			} else {
+				tomoyo_set_slash(head);
+			}
+			tomoyo_set_string(head, tomoyo_socket_keyword[bit]);
+		}
+		if (first)
+			return true;
+		tomoyo_print_name_union(head, &ptr->name);
 	} else if (acl_type == TOMOYO_TYPE_MOUNT_ACL) {
 		struct tomoyo_mount_acl *ptr =
 			container_of(acl, typeof(*ptr), head);
@@ -1548,8 +1630,9 @@ static const char *tomoyo_transition_type[TOMOYO_MAX_TRANSITION_TYPE] = {
 
 /* String table for grouping keywords. */
 static const char *tomoyo_group_name[TOMOYO_MAX_GROUP] = {
-	[TOMOYO_PATH_GROUP]   = "path_group ",
-	[TOMOYO_NUMBER_GROUP] = "number_group ",
+	[TOMOYO_PATH_GROUP]    = "path_group ",
+	[TOMOYO_NUMBER_GROUP]  = "number_group ",
+	[TOMOYO_ADDRESS_GROUP] = "address_group ",
 };
 
 /**
@@ -1591,7 +1674,7 @@ static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
 }
 
 /**
- * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
+ * tomoyo_read_group - Read "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
  *
  * @head: Pointer to "struct tomoyo_io_buffer".
  * @idx:  Index number.
@@ -1628,6 +1711,15 @@ static bool tomoyo_read_group(struct tomoyo_io_buffer *head, const int idx)
 							  (ptr,
 						   struct tomoyo_number_group,
 							   head)->number);
+			} else if (idx == TOMOYO_ADDRESS_GROUP) {
+				char buffer[128];
+
+				struct tomoyo_address_group *member =
+					container_of(ptr, typeof(*member),
+						     head);
+				tomoyo_print_ip(buffer, sizeof(buffer),
+						&member->address);
+				tomoyo_io_printf(head, " %s", buffer);
 			}
 			tomoyo_set_lf(head);
 		}
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
index 63720a328edd..d1c758e7f92b 100644
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
@@ -23,6 +23,16 @@
 #include <linux/poll.h>
 #include <linux/binfmts.h>
 #include <linux/highmem.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/un.h>
+#include <net/sock.h>
+#include <net/af_unix.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/udp.h>
 
 /********** Constants definitions. **********/
 
@@ -34,6 +44,12 @@
 #define TOMOYO_HASH_BITS  8
 #define TOMOYO_MAX_HASH (1u<<TOMOYO_HASH_BITS)
 
+/*
+ * TOMOYO checks only SOCK_STREAM, SOCK_DGRAM, SOCK_RAW, SOCK_SEQPACKET.
+ * Therefore, we don't need SOCK_MAX.
+ */
+#define TOMOYO_SOCK_MAX 6
+
 #define TOMOYO_EXEC_TMPSIZE     4096
 
 /* Profile number is an integer between 0 and 255. */
@@ -136,6 +152,7 @@ enum tomoyo_mode_index {
 /* Index numbers for entry type. */
 enum tomoyo_policy_id {
 	TOMOYO_ID_GROUP,
+	TOMOYO_ID_ADDRESS_GROUP,
 	TOMOYO_ID_PATH_GROUP,
 	TOMOYO_ID_NUMBER_GROUP,
 	TOMOYO_ID_TRANSITION_CONTROL,
@@ -166,6 +183,7 @@ enum tomoyo_domain_info_flags_index {
 enum tomoyo_group_id {
 	TOMOYO_PATH_GROUP,
 	TOMOYO_NUMBER_GROUP,
+	TOMOYO_ADDRESS_GROUP,
 	TOMOYO_MAX_GROUP
 };
 
@@ -196,6 +214,8 @@ enum tomoyo_acl_entry_type_index {
 	TOMOYO_TYPE_PATH_NUMBER_ACL,
 	TOMOYO_TYPE_MKDEV_ACL,
 	TOMOYO_TYPE_MOUNT_ACL,
+	TOMOYO_TYPE_INET_ACL,
+	TOMOYO_TYPE_UNIX_ACL,
 	TOMOYO_TYPE_ENV_ACL,
 };
 
@@ -229,6 +249,15 @@ enum tomoyo_mkdev_acl_index {
 	TOMOYO_MAX_MKDEV_OPERATION
 };
 
+/* Index numbers for socket operations. */
+enum tomoyo_network_acl_index {
+	TOMOYO_NETWORK_BIND,    /* bind() operation. */
+	TOMOYO_NETWORK_LISTEN,  /* listen() operation. */
+	TOMOYO_NETWORK_CONNECT, /* connect() operation. */
+	TOMOYO_NETWORK_SEND,    /* send() operation. */
+	TOMOYO_MAX_NETWORK_OPERATION
+};
+
 /* Index numbers for access controls with two pathnames. */
 enum tomoyo_path2_acl_index {
 	TOMOYO_TYPE_LINK,
@@ -301,6 +330,21 @@ enum tomoyo_mac_index {
 	TOMOYO_MAC_FILE_MOUNT,
 	TOMOYO_MAC_FILE_UMOUNT,
 	TOMOYO_MAC_FILE_PIVOT_ROOT,
+	TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
+	TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
+	TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
+	TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
+	TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
+	TOMOYO_MAC_NETWORK_INET_RAW_BIND,
+	TOMOYO_MAC_NETWORK_INET_RAW_SEND,
+	TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
+	TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
+	TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
+	TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
+	TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
+	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+	TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
 	TOMOYO_MAC_ENVIRON,
 	TOMOYO_MAX_MAC_INDEX
 };
@@ -308,6 +352,7 @@ enum tomoyo_mac_index {
 /* Index numbers for category of functionality. */
 enum tomoyo_mac_category_index {
 	TOMOYO_MAC_CATEGORY_FILE,
+	TOMOYO_MAC_CATEGORY_NETWORK,
 	TOMOYO_MAC_CATEGORY_MISC,
 	TOMOYO_MAX_MAC_CATEGORY_INDEX
 };
@@ -403,6 +448,22 @@ struct tomoyo_request_info {
 			const struct tomoyo_path_info *name;
 		} environ;
 		struct {
+			const __be32 *address;
+			u16 port;
+			/* One of values smaller than TOMOYO_SOCK_MAX. */
+			u8 protocol;
+			/* One of values in "enum tomoyo_network_acl_index". */
+			u8 operation;
+			bool is_ipv6;
+		} inet_network;
+		struct {
+			const struct tomoyo_path_info *address;
+			/* One of values smaller than TOMOYO_SOCK_MAX. */
+			u8 protocol;
+			/* One of values in "enum tomoyo_network_acl_index". */
+			u8 operation;
+		} unix_network;
+		struct {
 			const struct tomoyo_path_info *type;
 			const struct tomoyo_path_info *dir;
 			const struct tomoyo_path_info *dev;
@@ -448,7 +509,14 @@ struct tomoyo_number_union {
 	u8 value_type[2];
 };
 
-/* Structure for "path_group"/"number_group" directive. */
+/* Structure for holding an IP address. */
+struct tomoyo_ipaddr_union {
+	struct in6_addr ip[2]; /* Big endian. */
+	struct tomoyo_group *group; /* Pointer to address group. */
+	bool is_ipv6; /* Valid only if @group == NULL. */
+};
+
+/* Structure for "path_group"/"number_group"/"address_group" directive. */
 struct tomoyo_group {
 	struct tomoyo_shared_acl_head head;
 	const struct tomoyo_path_info *group_name;
@@ -467,6 +535,13 @@ struct tomoyo_number_group {
 	struct tomoyo_number_union number;
 };
 
+/* Structure for "address_group" directive. */
+struct tomoyo_address_group {
+	struct tomoyo_acl_head head;
+	/* Structure for holding an IP address. */
+	struct tomoyo_ipaddr_union address;
+};
+
 /* Subset of "struct stat". Used by conditional ACL and audit logs. */
 struct tomoyo_mini_stat {
 	uid_t uid;
@@ -650,6 +725,23 @@ struct tomoyo_env_acl {
 	const struct tomoyo_path_info *env; /* environment variable */
 };
 
+/* Structure for "network inet" directive. */
+struct tomoyo_inet_acl {
+	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_INET_ACL */
+	u8 protocol;
+	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
+	struct tomoyo_ipaddr_union address;
+	struct tomoyo_number_union port;
+};
+
+/* Structure for "network unix" directive. */
+struct tomoyo_unix_acl {
+	struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_UNIX_ACL */
+	u8 protocol;
+	u8 perm; /* Bitmask of values in "enum tomoyo_network_acl_index" */
+	struct tomoyo_name_union name;
+};
+
 /* Structure for holding a line from /sys/kernel/security/tomoyo/ interface. */
 struct tomoyo_acl_param {
 	char *data;
@@ -793,6 +885,8 @@ struct tomoyo_policy_namespace {
 
 /********** Function prototypes. **********/
 
+bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
+				  const struct tomoyo_group *group);
 bool tomoyo_compare_number_union(const unsigned long value,
 				 const struct tomoyo_number_union *ptr);
 bool tomoyo_condition(struct tomoyo_request_info *r,
@@ -808,6 +902,8 @@ bool tomoyo_memory_ok(void *ptr);
 bool tomoyo_number_matches_group(const unsigned long min,
 				 const unsigned long max,
 				 const struct tomoyo_group *group);
+bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
+			       struct tomoyo_ipaddr_union *ptr);
 bool tomoyo_parse_name_union(struct tomoyo_acl_param *param,
 			     struct tomoyo_name_union *ptr);
 bool tomoyo_parse_number_union(struct tomoyo_acl_param *param,
@@ -817,6 +913,7 @@ bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
 bool tomoyo_permstr(const char *string, const char *keyword);
 bool tomoyo_str_starts(char **src, const char *find);
 char *tomoyo_encode(const char *str);
+char *tomoyo_encode2(const char *str, int str_len);
 char *tomoyo_init_log(struct tomoyo_request_info *r, int len, const char *fmt,
 		      va_list args);
 char *tomoyo_read_token(struct tomoyo_acl_param *param);
@@ -855,6 +952,13 @@ int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation,
 			   const struct tomoyo_path_info *filename);
 int tomoyo_poll_control(struct file *file, poll_table *wait);
 int tomoyo_poll_log(struct file *file, poll_table *wait);
+int tomoyo_socket_bind_permission(struct socket *sock, struct sockaddr *addr,
+				  int addr_len);
+int tomoyo_socket_connect_permission(struct socket *sock,
+				     struct sockaddr *addr, int addr_len);
+int tomoyo_socket_listen_permission(struct socket *sock);
+int tomoyo_socket_sendmsg_permission(struct socket *sock, struct msghdr *msg,
+				     int size);
 int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 	__printf(2, 3);
 int tomoyo_update_domain(struct tomoyo_acl_info *new_entry, const int size,
@@ -874,8 +978,10 @@ int tomoyo_write_aggregator(struct tomoyo_acl_param *param);
 int tomoyo_write_file(struct tomoyo_acl_param *param);
 int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type);
 int tomoyo_write_misc(struct tomoyo_acl_param *param);
+int tomoyo_write_inet_network(struct tomoyo_acl_param *param);
 int tomoyo_write_transition_control(struct tomoyo_acl_param *param,
 				    const u8 type);
+int tomoyo_write_unix_network(struct tomoyo_acl_param *param);
 ssize_t tomoyo_read_control(struct tomoyo_io_buffer *head, char __user *buffer,
 			    const int buffer_len);
 ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
@@ -911,6 +1017,8 @@ void tomoyo_load_policy(const char *filename);
 void tomoyo_memory_free(void *ptr);
 void tomoyo_normalize_line(unsigned char *buffer);
 void tomoyo_notify_gc(struct tomoyo_io_buffer *head, const bool is_register);
+void tomoyo_print_ip(char *buf, const unsigned int size,
+		     const struct tomoyo_ipaddr_union *ptr);
 void tomoyo_print_ulong(char *buffer, const int buffer_len,
 			const unsigned long value, const u8 type);
 void tomoyo_put_name_union(struct tomoyo_name_union *ptr);
@@ -933,6 +1041,8 @@ extern const char * const tomoyo_mac_keywords[TOMOYO_MAX_MAC_INDEX
 					      + TOMOYO_MAX_MAC_CATEGORY_INDEX];
 extern const char * const tomoyo_mode[TOMOYO_CONFIG_MAX_MODE];
 extern const char * const tomoyo_path_keyword[TOMOYO_MAX_PATH_OPERATION];
+extern const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX];
+extern const char * const tomoyo_socket_keyword[TOMOYO_MAX_NETWORK_OPERATION];
 extern const u8 tomoyo_index2category[TOMOYO_MAX_MAC_INDEX];
 extern const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION];
 extern const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION];
@@ -1112,6 +1222,21 @@ static inline bool tomoyo_same_number_union
 }
 
 /**
+ * tomoyo_same_ipaddr_union - Check for duplicated "struct tomoyo_ipaddr_union" entry.
+ *
+ * @a: Pointer to "struct tomoyo_ipaddr_union".
+ * @b: Pointer to "struct tomoyo_ipaddr_union".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static inline bool tomoyo_same_ipaddr_union
+(const struct tomoyo_ipaddr_union *a, const struct tomoyo_ipaddr_union *b)
+{
+	return !memcmp(a->ip, b->ip, sizeof(a->ip)) && a->group == b->group &&
+		a->is_ipv6 == b->is_ipv6;
+}
+
+/**
  * tomoyo_current_namespace - Get "struct tomoyo_policy_namespace" for current thread.
  *
  * Returns pointer to "struct tomoyo_policy_namespace" for current thread.
diff --git a/security/tomoyo/gc.c b/security/tomoyo/gc.c
index 818b07998111..7747ceb9a221 100644
--- a/security/tomoyo/gc.c
+++ b/security/tomoyo/gc.c
@@ -16,6 +16,7 @@ static DEFINE_SPINLOCK(tomoyo_io_buffer_list_lock);
 /* Size of an element. */
 static const u8 tomoyo_element_size[TOMOYO_MAX_POLICY] = {
 	[TOMOYO_ID_GROUP] = sizeof(struct tomoyo_group),
+	[TOMOYO_ID_ADDRESS_GROUP] = sizeof(struct tomoyo_address_group),
 	[TOMOYO_ID_PATH_GROUP] = sizeof(struct tomoyo_path_group),
 	[TOMOYO_ID_NUMBER_GROUP] = sizeof(struct tomoyo_number_group),
 	[TOMOYO_ID_AGGREGATOR] = sizeof(struct tomoyo_aggregator),
@@ -36,6 +37,8 @@ static const u8 tomoyo_acl_size[] = {
 	[TOMOYO_TYPE_PATH_NUMBER_ACL] = sizeof(struct tomoyo_path_number_acl),
 	[TOMOYO_TYPE_MKDEV_ACL] = sizeof(struct tomoyo_mkdev_acl),
 	[TOMOYO_TYPE_MOUNT_ACL] = sizeof(struct tomoyo_mount_acl),
+	[TOMOYO_TYPE_INET_ACL] = sizeof(struct tomoyo_inet_acl),
+	[TOMOYO_TYPE_UNIX_ACL] = sizeof(struct tomoyo_unix_acl),
 	[TOMOYO_TYPE_ENV_ACL] = sizeof(struct tomoyo_env_acl),
 };
 
@@ -302,6 +305,23 @@ static void tomoyo_del_acl(struct list_head *element)
 			tomoyo_put_name(entry->env);
 		}
 		break;
+	case TOMOYO_TYPE_INET_ACL:
+		{
+			struct tomoyo_inet_acl *entry =
+				container_of(acl, typeof(*entry), head);
+
+			tomoyo_put_group(entry->address.group);
+			tomoyo_put_number_union(&entry->port);
+		}
+		break;
+	case TOMOYO_TYPE_UNIX_ACL:
+		{
+			struct tomoyo_unix_acl *entry =
+				container_of(acl, typeof(*entry), head);
+
+			tomoyo_put_name_union(&entry->name);
+		}
+		break;
 	}
 }
 
@@ -431,6 +451,18 @@ static void tomoyo_del_group(struct list_head *element)
 }
 
 /**
+ * tomoyo_del_address_group - Delete members in "struct tomoyo_address_group".
+ *
+ * @element: Pointer to "struct list_head".
+ *
+ * Returns nothing.
+ */
+static inline void tomoyo_del_address_group(struct list_head *element)
+{
+	/* Nothing to do. */
+}
+
+/**
  * tomoyo_del_number_group - Delete members in "struct tomoyo_number_group".
  *
  * @element: Pointer to "struct list_head".
@@ -527,9 +559,12 @@ static void tomoyo_collect_entry(void)
 			case 0:
 				id = TOMOYO_ID_PATH_GROUP;
 				break;
-			default:
+			case 1:
 				id = TOMOYO_ID_NUMBER_GROUP;
 				break;
+			default:
+				id = TOMOYO_ID_ADDRESS_GROUP;
+				break;
 			}
 			list_for_each_entry(group, list, head.list) {
 				if (!tomoyo_collect_member
@@ -634,6 +669,9 @@ static bool tomoyo_kfree_entry(void)
 		case TOMOYO_ID_PATH_GROUP:
 			tomoyo_del_path_group(element);
 			break;
+		case TOMOYO_ID_ADDRESS_GROUP:
+			tomoyo_del_address_group(element);
+			break;
 		case TOMOYO_ID_GROUP:
 			tomoyo_del_group(element);
 			break;
diff --git a/security/tomoyo/group.c b/security/tomoyo/group.c
index 5fb0e1298400..50092534ec54 100644
--- a/security/tomoyo/group.c
+++ b/security/tomoyo/group.c
@@ -42,7 +42,26 @@ static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
 }
 
 /**
- * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group" list.
+ * tomoyo_same_address_group - Check for duplicated "struct tomoyo_address_group" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_head".
+ * @b: Pointer to "struct tomoyo_acl_head".
+ *
+ * Returns true if @a == @b, false otherwise.
+ */
+static bool tomoyo_same_address_group(const struct tomoyo_acl_head *a,
+				      const struct tomoyo_acl_head *b)
+{
+	const struct tomoyo_address_group *p1 = container_of(a, typeof(*p1),
+							     head);
+	const struct tomoyo_address_group *p2 = container_of(b, typeof(*p2),
+							     head);
+
+	return tomoyo_same_ipaddr_union(&p1->address, &p2->address);
+}
+
+/**
+ * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
  *
  * @param: Pointer to "struct tomoyo_acl_param".
  * @type:  Type of this group.
@@ -77,6 +96,14 @@ int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type)
 		 * tomoyo_put_number_union() is not needed because
 		 * param->data[0] != '@'.
 		 */
+	} else {
+		struct tomoyo_address_group e = { };
+
+		if (param->data[0] == '@' ||
+		    !tomoyo_parse_ipaddr_union(param, &e.address))
+			goto out;
+		error = tomoyo_update_policy(&e.head, sizeof(e), param,
+					     tomoyo_same_address_group);
 	}
 out:
 	tomoyo_put_group(group);
@@ -137,3 +164,35 @@ bool tomoyo_number_matches_group(const unsigned long min,
 	}
 	return matched;
 }
+
+/**
+ * tomoyo_address_matches_group - Check whether the given address matches members of the given address group.
+ *
+ * @is_ipv6: True if @address is an IPv6 address.
+ * @address: An IPv4 or IPv6 address.
+ * @group:   Pointer to "struct tomoyo_address_group".
+ *
+ * Returns true if @address matches addresses in @group group, false otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
+				  const struct tomoyo_group *group)
+{
+	struct tomoyo_address_group *member;
+	bool matched = false;
+	const u8 size = is_ipv6 ? 16 : 4;
+
+	list_for_each_entry_rcu(member, &group->member_list, head.list) {
+		if (member->head.is_deleted)
+			continue;
+		if (member->address.is_ipv6 != is_ipv6)
+			continue;
+		if (memcmp(&member->address.ip[0], address, size) > 0 ||
+		    memcmp(address, &member->address.ip[1], size) > 0)
+			continue;
+		matched = true;
+		break;
+	}
+	return matched;
+}
diff --git a/security/tomoyo/network.c b/security/tomoyo/network.c
new file mode 100644
index 000000000000..97527710a72a
--- /dev/null
+++ b/security/tomoyo/network.c
@@ -0,0 +1,771 @@
+/*
+ * security/tomoyo/network.c
+ *
+ * Copyright (C) 2005-2011  NTT DATA CORPORATION
+ */
+
+#include "common.h"
+#include <linux/slab.h>
+
+/* Structure for holding inet domain socket's address. */
+struct tomoyo_inet_addr_info {
+	__be16 port;           /* In network byte order. */
+	const __be32 *address; /* In network byte order. */
+	bool is_ipv6;
+};
+
+/* Structure for holding unix domain socket's address. */
+struct tomoyo_unix_addr_info {
+	u8 *addr; /* This may not be '\0' terminated string. */
+	unsigned int addr_len;
+};
+
+/* Structure for holding socket address. */
+struct tomoyo_addr_info {
+	u8 protocol;
+	u8 operation;
+	struct tomoyo_inet_addr_info inet;
+	struct tomoyo_unix_addr_info unix0;
+};
+
+/* String table for socket's protocols. */
+const char * const tomoyo_proto_keyword[TOMOYO_SOCK_MAX] = {
+	[SOCK_STREAM]    = "stream",
+	[SOCK_DGRAM]     = "dgram",
+	[SOCK_RAW]       = "raw",
+	[SOCK_SEQPACKET] = "seqpacket",
+	[0] = " ", /* Dummy for avoiding NULL pointer dereference. */
+	[4] = " ", /* Dummy for avoiding NULL pointer dereference. */
+};
+
+/**
+ * tomoyo_parse_ipaddr_union - Parse an IP address.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ * @ptr:   Pointer to "struct tomoyo_ipaddr_union".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_parse_ipaddr_union(struct tomoyo_acl_param *param,
+			       struct tomoyo_ipaddr_union *ptr)
+{
+	u8 * const min = ptr->ip[0].in6_u.u6_addr8;
+	u8 * const max = ptr->ip[1].in6_u.u6_addr8;
+	char *address = tomoyo_read_token(param);
+	const char *end;
+
+	if (!strchr(address, ':') &&
+	    in4_pton(address, -1, min, '-', &end) > 0) {
+		ptr->is_ipv6 = false;
+		if (!*end)
+			ptr->ip[1].s6_addr32[0] = ptr->ip[0].s6_addr32[0];
+		else if (*end++ != '-' ||
+			 in4_pton(end, -1, max, '\0', &end) <= 0 || *end)
+			return false;
+		return true;
+	}
+	if (in6_pton(address, -1, min, '-', &end) > 0) {
+		ptr->is_ipv6 = true;
+		if (!*end)
+			memmove(max, min, sizeof(u16) * 8);
+		else if (*end++ != '-' ||
+			 in6_pton(end, -1, max, '\0', &end) <= 0 || *end)
+			return false;
+		return true;
+	}
+	return false;
+}
+
+/**
+ * tomoyo_print_ipv4 - Print an IPv4 address.
+ *
+ * @buffer:     Buffer to write to.
+ * @buffer_len: Size of @buffer.
+ * @min_ip:     Pointer to __be32.
+ * @max_ip:     Pointer to __be32.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_ipv4(char *buffer, const unsigned int buffer_len,
+			      const __be32 *min_ip, const __be32 *max_ip)
+{
+	snprintf(buffer, buffer_len, "%pI4%c%pI4", min_ip,
+		 *min_ip == *max_ip ? '\0' : '-', max_ip);
+}
+
+/**
+ * tomoyo_print_ipv6 - Print an IPv6 address.
+ *
+ * @buffer:     Buffer to write to.
+ * @buffer_len: Size of @buffer.
+ * @min_ip:     Pointer to "struct in6_addr".
+ * @max_ip:     Pointer to "struct in6_addr".
+ *
+ * Returns nothing.
+ */
+static void tomoyo_print_ipv6(char *buffer, const unsigned int buffer_len,
+			      const struct in6_addr *min_ip,
+			      const struct in6_addr *max_ip)
+{
+	snprintf(buffer, buffer_len, "%pI6c%c%pI6c", min_ip,
+		 !memcmp(min_ip, max_ip, 16) ? '\0' : '-', max_ip);
+}
+
+/**
+ * tomoyo_print_ip - Print an IP address.
+ *
+ * @buf:  Buffer to write to.
+ * @size: Size of @buf.
+ * @ptr:  Pointer to "struct ipaddr_union".
+ *
+ * Returns nothing.
+ */
+void tomoyo_print_ip(char *buf, const unsigned int size,
+		     const struct tomoyo_ipaddr_union *ptr)
+{
+	if (ptr->is_ipv6)
+		tomoyo_print_ipv6(buf, size, &ptr->ip[0], &ptr->ip[1]);
+	else
+		tomoyo_print_ipv4(buf, size, &ptr->ip[0].s6_addr32[0],
+				  &ptr->ip[1].s6_addr32[0]);
+}
+
+/*
+ * Mapping table from "enum tomoyo_network_acl_index" to
+ * "enum tomoyo_mac_index" for inet domain socket.
+ */
+static const u8 tomoyo_inet2mac
+[TOMOYO_SOCK_MAX][TOMOYO_MAX_NETWORK_OPERATION] = {
+	[SOCK_STREAM] = {
+		[TOMOYO_NETWORK_BIND]    = TOMOYO_MAC_NETWORK_INET_STREAM_BIND,
+		[TOMOYO_NETWORK_LISTEN]  =
+		TOMOYO_MAC_NETWORK_INET_STREAM_LISTEN,
+		[TOMOYO_NETWORK_CONNECT] =
+		TOMOYO_MAC_NETWORK_INET_STREAM_CONNECT,
+	},
+	[SOCK_DGRAM] = {
+		[TOMOYO_NETWORK_BIND]    = TOMOYO_MAC_NETWORK_INET_DGRAM_BIND,
+		[TOMOYO_NETWORK_SEND]    = TOMOYO_MAC_NETWORK_INET_DGRAM_SEND,
+	},
+	[SOCK_RAW]    = {
+		[TOMOYO_NETWORK_BIND]    = TOMOYO_MAC_NETWORK_INET_RAW_BIND,
+		[TOMOYO_NETWORK_SEND]    = TOMOYO_MAC_NETWORK_INET_RAW_SEND,
+	},
+};
+
+/*
+ * Mapping table from "enum tomoyo_network_acl_index" to
+ * "enum tomoyo_mac_index" for unix domain socket.
+ */
+static const u8 tomoyo_unix2mac
+[TOMOYO_SOCK_MAX][TOMOYO_MAX_NETWORK_OPERATION] = {
+	[SOCK_STREAM] = {
+		[TOMOYO_NETWORK_BIND]    = TOMOYO_MAC_NETWORK_UNIX_STREAM_BIND,
+		[TOMOYO_NETWORK_LISTEN]  =
+		TOMOYO_MAC_NETWORK_UNIX_STREAM_LISTEN,
+		[TOMOYO_NETWORK_CONNECT] =
+		TOMOYO_MAC_NETWORK_UNIX_STREAM_CONNECT,
+	},
+	[SOCK_DGRAM] = {
+		[TOMOYO_NETWORK_BIND]    = TOMOYO_MAC_NETWORK_UNIX_DGRAM_BIND,
+		[TOMOYO_NETWORK_SEND]    = TOMOYO_MAC_NETWORK_UNIX_DGRAM_SEND,
+	},
+	[SOCK_SEQPACKET] = {
+		[TOMOYO_NETWORK_BIND]    =
+		TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_BIND,
+		[TOMOYO_NETWORK_LISTEN]  =
+		TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_LISTEN,
+		[TOMOYO_NETWORK_CONNECT] =
+		TOMOYO_MAC_NETWORK_UNIX_SEQPACKET_CONNECT,
+	},
+};
+
+/**
+ * tomoyo_same_inet_acl - Check for duplicated "struct tomoyo_inet_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_inet_acl(const struct tomoyo_acl_info *a,
+				 const struct tomoyo_acl_info *b)
+{
+	const struct tomoyo_inet_acl *p1 = container_of(a, typeof(*p1), head);
+	const struct tomoyo_inet_acl *p2 = container_of(b, typeof(*p2), head);
+
+	return p1->protocol == p2->protocol &&
+		tomoyo_same_ipaddr_union(&p1->address, &p2->address) &&
+		tomoyo_same_number_union(&p1->port, &p2->port);
+}
+
+/**
+ * tomoyo_same_unix_acl - Check for duplicated "struct tomoyo_unix_acl" entry.
+ *
+ * @a: Pointer to "struct tomoyo_acl_info".
+ * @b: Pointer to "struct tomoyo_acl_info".
+ *
+ * Returns true if @a == @b except permission bits, false otherwise.
+ */
+static bool tomoyo_same_unix_acl(const struct tomoyo_acl_info *a,
+				 const struct tomoyo_acl_info *b)
+{
+	const struct tomoyo_unix_acl *p1 = container_of(a, typeof(*p1), head);
+	const struct tomoyo_unix_acl *p2 = container_of(b, typeof(*p2), head);
+
+	return p1->protocol == p2->protocol &&
+		tomoyo_same_name_union(&p1->name, &p2->name);
+}
+
+/**
+ * tomoyo_merge_inet_acl - Merge duplicated "struct tomoyo_inet_acl" entry.
+ *
+ * @a:         Pointer to "struct tomoyo_acl_info".
+ * @b:         Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_inet_acl(struct tomoyo_acl_info *a,
+				  struct tomoyo_acl_info *b,
+				  const bool is_delete)
+{
+	u8 * const a_perm =
+		&container_of(a, struct tomoyo_inet_acl, head)->perm;
+	u8 perm = *a_perm;
+	const u8 b_perm = container_of(b, struct tomoyo_inet_acl, head)->perm;
+
+	if (is_delete)
+		perm &= ~b_perm;
+	else
+		perm |= b_perm;
+	*a_perm = perm;
+	return !perm;
+}
+
+/**
+ * tomoyo_merge_unix_acl - Merge duplicated "struct tomoyo_unix_acl" entry.
+ *
+ * @a:         Pointer to "struct tomoyo_acl_info".
+ * @b:         Pointer to "struct tomoyo_acl_info".
+ * @is_delete: True for @a &= ~@b, false for @a |= @b.
+ *
+ * Returns true if @a is empty, false otherwise.
+ */
+static bool tomoyo_merge_unix_acl(struct tomoyo_acl_info *a,
+				  struct tomoyo_acl_info *b,
+				  const bool is_delete)
+{
+	u8 * const a_perm =
+		&container_of(a, struct tomoyo_unix_acl, head)->perm;
+	u8 perm = *a_perm;
+	const u8 b_perm = container_of(b, struct tomoyo_unix_acl, head)->perm;
+
+	if (is_delete)
+		perm &= ~b_perm;
+	else
+		perm |= b_perm;
+	*a_perm = perm;
+	return !perm;
+}
+
+/**
+ * tomoyo_write_inet_network - Write "struct tomoyo_inet_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * Caller holds tomoyo_read_lock().
+ */
+int tomoyo_write_inet_network(struct tomoyo_acl_param *param)
+{
+	struct tomoyo_inet_acl e = { .head.type = TOMOYO_TYPE_INET_ACL };
+	int error = -EINVAL;
+	u8 type;
+	const char *protocol = tomoyo_read_token(param);
+	const char *operation = tomoyo_read_token(param);
+
+	for (e.protocol = 0; e.protocol < TOMOYO_SOCK_MAX; e.protocol++)
+		if (!strcmp(protocol, tomoyo_proto_keyword[e.protocol]))
+			break;
+	for (type = 0; type < TOMOYO_MAX_NETWORK_OPERATION; type++)
+		if (tomoyo_permstr(operation, tomoyo_socket_keyword[type]))
+			e.perm |= 1 << type;
+	if (e.protocol == TOMOYO_SOCK_MAX || !e.perm)
+		return -EINVAL;
+	if (param->data[0] == '@') {
+		param->data++;
+		e.address.group =
+			tomoyo_get_group(param, TOMOYO_ADDRESS_GROUP);
+		if (!e.address.group)
+			return -ENOMEM;
+	} else {
+		if (!tomoyo_parse_ipaddr_union(param, &e.address))
+			goto out;
+	}
+	if (!tomoyo_parse_number_union(param, &e.port) ||
+	    e.port.values[1] > 65535)
+		goto out;
+	error = tomoyo_update_domain(&e.head, sizeof(e), param,
+				     tomoyo_same_inet_acl,
+				     tomoyo_merge_inet_acl);
+out:
+	tomoyo_put_group(e.address.group);
+	tomoyo_put_number_union(&e.port);
+	return error;
+}
+
+/**
+ * tomoyo_write_unix_network - Write "struct tomoyo_unix_acl" list.
+ *
+ * @param: Pointer to "struct tomoyo_acl_param".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_unix_network(struct tomoyo_acl_param *param)
+{
+	struct tomoyo_unix_acl e