diff --git a/src/context/mdb/mdb.go b/src/context/mdb/mdb.go
new file mode 100644
index 00000000..6586148c
--- /dev/null
+++ b/src/context/mdb/mdb.go
@@ -0,0 +1,175 @@
+package mdb // {{{
+// }}}
+import ( // {{{
+	"context"
+
+	"database/sql"
+	_ "github.com/go-sql-driver/mysql"
+
+	"errors"
+	"fmt"
+	"log"
+)
+
+// }}}
+
+type MDB struct {
+	db *sql.DB
+	*ctx.Context
+}
+
+func (mdb *MDB) Begin(m *ctx.Message, arg ...string) ctx.Server { // {{{
+	mdb.Configs["source"] = &ctx.Config{Name: "source", Value: "", Help: "数据库参数"}
+	mdb.Configs["driver"] = &ctx.Config{Name: "driver", Value: "", Help: "数据库驱动"}
+
+	return mdb
+}
+
+// }}}
+func (mdb *MDB) Start(m *ctx.Message, arg ...string) bool { // {{{
+	mdb.Capi("nsource", 1)
+	defer mdb.Capi("nsource", -1)
+
+	if len(arg) > 0 {
+		mdb.Conf("source", arg[0])
+
+		if len(arg) > 1 {
+			mdb.Conf("driver", arg[1])
+		}
+	}
+
+	if mdb.Conf("source") == "" || mdb.Conf("driver") == "" {
+		return true
+	}
+
+	db, e := sql.Open(mdb.Conf("driver"), mdb.Conf("source"))
+	mdb.Assert(e)
+	mdb.db = db
+	defer mdb.db.Close()
+
+	log.Println(mdb.Name, "open:", mdb.Conf("driver"), mdb.Conf("source"))
+	defer log.Println(mdb.Name, "close:", mdb.Conf("driver"), mdb.Conf("source"))
+
+	for _, p := range m.Meta["prepare"] {
+		_, e := db.Exec(p)
+		mdb.Assert(e)
+	}
+
+	return true
+}
+
+// }}}
+func (mdb *MDB) Spawn(c *ctx.Context, m *ctx.Message, arg ...string) ctx.Server { // {{{
+	c.Caches = map[string]*ctx.Cache{}
+	c.Configs = map[string]*ctx.Config{}
+
+	s := new(MDB)
+	s.Context = c
+	return s
+}
+
+// }}}
+func (mdb *MDB) Exit(m *ctx.Message, arg ...string) bool { // {{{
+	return true
+}
+
+// }}}
+
+var Index = &ctx.Context{Name: "mdb", Help: "内存数据库",
+	Caches: map[string]*ctx.Cache{
+		"nsource": &ctx.Cache{Name: "数据源数量", Value: "0", Help: "数据库连接的数量"},
+	},
+	Configs: map[string]*ctx.Config{},
+	Commands: map[string]*ctx.Command{
+		"open": &ctx.Command{Name: "open [source [driver]]", Help: "打开数据库",
+			Options: map[string]string{
+				"prepare": "打开数据库时自动执行的语句",
+			},
+			Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+				m.Start("db"+c.Cap("nsource"), arg...) // {{{
+				return ""
+				// }}}
+			}},
+		"exec": &ctx.Command{Name: "exec sql [arg]", Help: "执行SQL语句",
+			Appends: map[string]string{
+				"LastInsertId": "最后插入元组的标识",
+				"RowsAffected": "修改元组的数量",
+			},
+			Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+				mdb, ok := m.Target.Server.(*MDB) // {{{
+				if !ok {
+					m.Assert(errors.New("目标模块类型错误"))
+				}
+				if len(arg) == 0 {
+					m.Assert(errors.New("缺少参数"))
+				}
+
+				which := make([]interface{}, 0, len(arg))
+				for _, v := range arg[1:] {
+					which = append(which, v)
+				}
+
+				ret, e := mdb.db.Exec(arg[0], which...)
+				m.Assert(e)
+
+				id, e := ret.LastInsertId()
+				m.Assert(e)
+				n, e := ret.RowsAffected()
+				m.Assert(e)
+
+				m.Add("append", "LastInsertId", fmt.Sprintf("%d", id))
+				m.Add("append", "RowsAffected", fmt.Sprintf("%d", n))
+				return ""
+				// }}}
+			}},
+		"query": &ctx.Command{Name: "query sql [arg]", Help: "执行SQL语句", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			mdb, ok := m.Target.Server.(*MDB) // {{{
+			if !ok {
+				m.Assert(errors.New("目标模块类型错误"))
+			}
+			if len(arg) == 0 {
+				m.Assert(errors.New("缺少参数"))
+			}
+
+			which := make([]interface{}, 0, len(arg))
+			for _, v := range arg[1:] {
+				which = append(which, v)
+			}
+
+			rows, e := mdb.db.Query(arg[0], which...)
+			m.Assert(e)
+			defer rows.Close()
+
+			cols, e := rows.Columns()
+			m.Assert(e)
+			num := len(cols)
+
+			for rows.Next() {
+				vals := make([]interface{}, num)
+				ptrs := make([]interface{}, num)
+				for i := range vals {
+					ptrs[i] = &vals[i]
+				}
+				rows.Scan(ptrs...)
+
+				for i, k := range cols {
+					switch b := vals[i].(type) {
+					case []byte:
+						m.Add("append", k, string(b))
+					case int64:
+						m.Add("append", k, fmt.Sprintf("%d", b))
+					}
+				}
+			}
+
+			return ""
+			// }}}
+		}},
+	},
+}
+
+func init() {
+	mdb := &MDB{}
+	mdb.Context = Index
+	ctx.Index.Register(Index, mdb)
+}
diff --git a/src/context/mdb/mdb_test.go b/src/context/mdb/mdb_test.go
new file mode 100644
index 00000000..4029ff2f
--- /dev/null
+++ b/src/context/mdb/mdb_test.go
@@ -0,0 +1,61 @@
+package mdb
+
+import (
+	"context"
+	"flag"
+	"log"
+	"os"
+	"testing"
+)
+
+func TestOpen(t *testing.T) {
+	flag.Parse()
+	args := flag.Args()
+	if len(args) < 2 {
+		t.Fatal("usages: -args source driver [table]")
+	}
+
+	source := "user:word@/book"
+	driver := "mysql"
+	source = args[0]
+	driver = args[1]
+
+	//mysql -u root -p;
+	//create database book;
+	//grant all on book.* to user identified by 'word'
+
+	ctx.Start()
+	ctx.Index.Conf("debug", "off")
+	log.SetOutput(os.Stdout)
+	m := ctx.Pulse.Spawn(Index)
+
+	m.Meta = nil
+	m.Cmd("open", source, driver)
+
+	m.Meta = nil
+	m.Cmd("exec", "insert into program(time, hash, name) values(?, ?, ?)", "1", "2", "3")
+
+	m.Meta = nil
+	m.Cmd("exec", "insert into program(time, hash, name) values(?, ?, ?)", "1", "2", "3")
+
+	m.Meta = nil
+	m.Cmd("exec", "insert into program(time, hash, name) values(?, ?, ?)", "2", "3", "4")
+
+	m.Meta = nil
+	m.Cmd("query", "select time, hash, name from program")
+
+	t.Log()
+	for i, rows := 0, len(m.Meta[m.Meta["append"][0]]); i < rows; i++ {
+		for _, k := range m.Meta["append"] {
+			t.Log(k, m.Meta[k][i])
+		}
+		t.Log()
+	}
+
+	if len(m.Meta["append"]) != 3 || len(m.Meta[m.Meta["append"][0]]) != 2 {
+		t.Error()
+	}
+
+	m.Meta = nil
+	// Index.Exit(m)
+}
diff --git a/src/context/tcp/tcp.go b/src/context/tcp/tcp.go
new file mode 100644
index 00000000..f32ff9f2
--- /dev/null
+++ b/src/context/tcp/tcp.go
@@ -0,0 +1,135 @@
+package tcp // {{{
+// }}}
+import ( // {{{
+	"context"
+	"log"
+	"net"
+)
+
+// }}}
+
+type TCP struct {
+	listener net.Listener
+	*ctx.Context
+}
+
+func (tcp *TCP) Begin(m *ctx.Message, arg ...string) ctx.Server { // {{{
+	tcp.Caches["nclient"] = &ctx.Cache{Name: "nclient", Value: "0", Help: "连接数量"}
+	return tcp
+}
+
+// }}}
+func (tcp *TCP) Start(m *ctx.Message, arg ...string) bool { // {{{
+	if tcp.Conf("address") == "" {
+		return true
+	}
+
+	l, e := net.Listen("tcp4", tcp.Conf("address"))
+	tcp.Assert(e)
+	tcp.listener = l
+
+	log.Printf("%s listen(%d): %v", tcp.Name, tcp.Capi("nlisten", 1), l.Addr())
+	defer tcp.Capi("nlisten", -1)
+	defer log.Println("%s close(%d): %v", tcp.Name, tcp.Capi("nlisten", 0), l.Addr())
+
+	for {
+		c, e := l.Accept()
+		tcp.Assert(e)
+		log.Printf("%s accept(%d): %v<-%v", tcp.Name, tcp.Capi("nclient", 1), c.LocalAddr(), c.RemoteAddr())
+		// defer log.Println(tcp.Name, "close:", tcp.Capi("nclient", -1), c.LocalAddr(), "<-", c.RemoteAddr())
+
+		msg := m.Spawn(m.Context, c.RemoteAddr().String()).Put("option", "io", c)
+		msg.Cmd("open", c.RemoteAddr().String(), "tcp")
+	}
+
+	return true
+}
+
+// }}}
+func (tcp *TCP) Spawn(c *ctx.Context, m *ctx.Message, arg ...string) ctx.Server { // {{{
+	c.Caches = map[string]*ctx.Cache{}
+	c.Configs = map[string]*ctx.Config{
+		"address": &ctx.Config{Name: "address", Value: arg[0], Help: "监听地址"},
+	}
+
+	s := new(TCP)
+	s.Context = c
+	return s
+
+}
+
+// }}}
+func (tcp *TCP) Exit(m *ctx.Message, arg ...string) bool { // {{{
+
+	if c, ok := m.Data["result"].(net.Conn); ok && m.Target == tcp.Context {
+		c.Close()
+		delete(m.Data, "result")
+		return true
+	}
+
+	if c, ok := m.Data["detail"].(net.Conn); ok && m.Context == tcp.Context {
+		c.Close()
+		delete(m.Data, "detail")
+		return true
+	}
+	return true
+}
+
+// }}}
+
+var Index = &ctx.Context{Name: "tcp", Help: "网络连接",
+	Caches: map[string]*ctx.Cache{
+		"nlisten": &ctx.Cache{Name: "nlisten", Value: "0", Help: "连接数量"},
+	},
+	Configs: map[string]*ctx.Config{
+		"address": &ctx.Config{Name: "address", Value: "", Help: "监听地址"},
+	},
+	Commands: map[string]*ctx.Command{
+		"listen": &ctx.Command{Name: "listen address", Help: "监听连接", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			switch len(arg) { // {{{
+			case 0:
+				for k, s := range m.Target.Contexts {
+					m.Echo("%s %s\n", k, s.Server.(*TCP).listener.Addr().String())
+				}
+			case 1:
+				go m.Start(arg[0], arg[0])
+			}
+			return ""
+			// }}}
+		}},
+		"dial": &ctx.Command{Name: "dial", Help: "建立连接", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			tcp := c.Server.(*TCP) // {{{
+			switch len(arg) {
+			case 0:
+				for i, v := range tcp.Requests {
+					conn := v.Data["result"].(net.Conn)
+					m.Echo(tcp.Name, "conn: %s %s -> %s\n", i, conn.LocalAddr(), conn.RemoteAddr())
+				}
+			case 2:
+				conn, e := net.Dial("tcp", arg[0])
+				c.Assert(e)
+				log.Println(tcp.Name, "dial:", conn.LocalAddr(), "->", conn.RemoteAddr())
+			}
+			return ""
+			// }}}
+		}},
+		"exit": &ctx.Command{Name: "exit", Help: "退出", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			tcp, ok := m.Target.Server.(*TCP) // {{{
+			if !ok {
+				tcp, ok = m.Context.Server.(*TCP)
+			}
+			if ok {
+				tcp.Context.Exit(m)
+			}
+
+			return ""
+			// }}}
+		}},
+	},
+}
+
+func init() {
+	tcp := &TCP{}
+	tcp.Context = Index
+	ctx.Index.Register(Index, tcp)
+}
diff --git a/src/context/tcp/tcp_test.go b/src/context/tcp/tcp_test.go
new file mode 100644
index 00000000..3695d9e3
--- /dev/null
+++ b/src/context/tcp/tcp_test.go
@@ -0,0 +1,29 @@
+package tcp
+
+import (
+	"context"
+	"flag"
+	"testing"
+	"time"
+)
+
+func TestOpen(t *testing.T) {
+	flag.Parse()
+	args := flag.Args()
+	if len(args) < 1 {
+		t.Fatal("usages: -args address")
+	}
+
+	address := ":9393"
+	address = args[0]
+
+	//mysql -u root -p;
+	//create database book;
+	//grant all on book.* to user identified by 'word'
+
+	ctx.Start()
+	m := ctx.Pulse.Spawn(Index)
+
+	m.Meta = nil
+	Index.Cmd(m, "listen", address)
+}