diff --git a/Makefile b/Makefile
index 36c8013..958a846 100644
--- a/Makefile
+++ b/Makefile
@@ -9,7 +9,7 @@ include $(INCLUDE_DIR)/package.mk
 EXTRA_CFLAGS:= \
 	$(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=m,%,$(filter %=m,$(EXTRA_KCONFIG)))) \
 	$(patsubst CONFIG_%, -DCONFIG_%=1, $(patsubst %=y,%,$(filter %=y,$(EXTRA_KCONFIG)))) \
-	-DVERSION='"$(PKG_RELEASE)"' --verbose
+	-DVERSION="\"\\\"$(PKG_RELEASE)\\\"\"" --verbose
 
 MAKE_OPTS:=$(KERNEL_MAKE_FLAGS) \
 	SUBDIRS="$(PKG_BUILD_DIR)" \
diff --git a/src/rkp-ua.c b/src/rkp-ua.c
index a11dd06..b4eb72a 100644
--- a/src/rkp-ua.c
+++ b/src/rkp-ua.c
@@ -6,14 +6,25 @@ static time_t last_flush;
 
 unsigned int hook_funcion(void *priv, struct sk_buff *skb, const struct nf_hook_state *state)
 {
-	u_int8_t rtn;
-	static u_int8_t crashed = 0;
+	unsigned rtn;
+	static bool crashed = 0;
+
+	static unsigned n_skb_captured = 0, n_skb_captured_lastPrint = 1;
 
 	if(crashed)
 		return NF_ACCEPT;
 	if(!rkpSettings_capture(skb))
 		return NF_ACCEPT;
+
 	rtn = rkpManager_execute(rkpm, skb);
+
+	n_skb_captured++;
+	if(n_skb_captured == n_skb_captured_lastPrint * 2)
+	{
+		printk("rkp-ua: Captured %d packages.\n", n_skb_captured);
+		n_skb_captured_lastPrint *= 2;
+	}
+
 	if(rtn == NF_DROP_ERR(1))
 	{
 		printk("rkp-ua: Crashed.\n");
diff --git a/src/rkpManager.h b/src/rkpManager.h
index 92a960a..95780e2 100644
--- a/src/rkpManager.h
+++ b/src/rkpManager.h
@@ -92,11 +92,8 @@ u_int8_t rkpManager_execute(struct rkpManager* rkpm, struct sk_buff* skb)
                 return rkpStream_execute(rkps, skb);
             else
                 rkps = rkps -> next;
-        if(rkps == 0)
-        {
-            printk("rkp-ua::rkpStream::rkpStream_execute: Target stream not found.\n");
-            return NF_DROP;
-        }
+        printk("rkp-ua::rkpStream::rkpStream_execute: Target stream not found.\n");
+        return NF_DROP;
     }
 }
 
diff --git a/src/rkpStream.h b/src/rkpStream.h
index c1cfa0b..80534ab 100644
--- a/src/rkpStream.h
+++ b/src/rkpStream.h
@@ -43,7 +43,7 @@ struct sk_buff* __rkpStream_buff_find(const struct sk_buff*, u_int32_t);
 
 void __rkpStream_buff_execute_core(struct sk_buff**, u_int16_t, bool);        // 最核心的步骤，集齐头部后被调用。搜索、替换。参数分别为：数据包链表、最后一个包中 http 头结束的位置、是否保留指定 ua
 
-struct rkpStream* rpStream_new(const struct sk_buff* skb)
+struct rkpStream* rkpStream_new(const struct sk_buff* skb)
 {
     struct rkpStream* rkps = kmalloc(sizeof(struct rkpStream), GFP_KERNEL);
     const struct iphdr* iph = ip_hdr(skb);
@@ -271,7 +271,7 @@ unsigned char* __rkpStream_skb_appBegin(const struct sk_buff* skb)
     return (unsigned char*)tcp_hdr(skb) + tcp_hdr(skb) -> doff * 4;
 }
 
-u_int16_t __rkpStream_dataLen(const struct sk_buff* skb)
+u_int16_t __rkpStream_skb_appLen(const struct sk_buff* skb)
 {
     return ntohs(ip_hdr(skb) -> tot_len) - ip_hdr(skb) -> ihl * 4 - tcp_hdr(skb) -> doff * 4;
 }
@@ -500,7 +500,7 @@ void __rkpStream_buff_execute_core(struct sk_buff** buff, u_int16_t last_len, bo
     {
         unsigned char* replace_begin;
         u_int16_t replace_len;
-        if(skb_ensure_writable(p, replace_begin + replace_len - p -> data) != 0)
+        if(skb_ensure_writable(p, __rkpStream_skb_appBegin(p) + __rkpStream_skb_appLen(p) - p -> data) != 0)
         {
             printk("rkp-ua::rkpStream::__rkpStream_buff_execute_core: Can not make skb writable, may caused by shortage of memory. Ignore it.\n");
             return;