diff --git a/src/rkpMap.h b/src/rkpMap.h
index 9d32016..e45be38 100644
--- a/src/rkpMap.h
+++ b/src/rkpMap.h
@@ -24,16 +24,17 @@ void rkpMap_insert_begin(struct rkpMap**, struct rkpMap*);
 void rkpMap_insert_end(struct rkpMap**, struct rkpMap*);
 // 在指定位置插入映射，假定要插入的映射的前后指针已经置零
 
-void rkpMap_refresh(struct rkpMap**, int32_t);                  // 对于一列序列号递增的映射，删除已经回应的映射
+void rkpMap_refresh(struct rkpMap**, uint32_t);
+// 对于一列序列号递增的映射，删除已经回应的映射。
 
-struct rkpMap* rkpMap_new(int32_t seql, int32_t seqr)
+struct rkpMap* rkpMap_new(uint32_t begin, uint32_t length)
 {
     struct rkpMap* rkpm = (struct rkpMap*)rkpMalloc(sizeof(struct rkpMap));
     if(rkpm == 0)
         return 0;
-    rkpm -> begin = seql;
-    rkpm -> length = seqr - seql;
-    rkpm -> prev = rkpm -> next = 0;
+    rkpm->begin = begin;
+    rkpm->length = length;
+    rkpm->prev = rkpm->next = 0;
     return rkpm;
 }
 void rkpMap_delete(struct rkpMap* rkpm)
@@ -41,7 +42,7 @@ void rkpMap_delete(struct rkpMap* rkpm)
     rkpFree(rkpm);
 }
 
-unsigned char __rkpMap_map(const struct rkpMap* rkpm, int32_t seq)
+unsigned char __rkpMap_ua(uint32_t seq)
 {
     if(seq < strlen(str_uaRkp))
         return str_uaRkp[seq];
@@ -51,35 +52,35 @@ unsigned char __rkpMap_map(const struct rkpMap* rkpm, int32_t seq)
 void rkpMap_modify(struct rkpMap** rkpml, struct rkpPacket** rkppl)
 {
     const struct rkpMap* rkpm;
-    for(rkpm = *rkpml; rkpm != 0; rkpm = rkpm -> next)
+    for(rkpm = *rkpml; rkpm != 0; rkpm = rkpm->next)
     {
         struct rkpPacket* rkpp;
         unsigned char* p = 0;
-        int32_t seq;
+        uint32_t seq;
 
         // 尝试确定第一个需要修改的包以及需要修改的开始处
-        for(rkpp = *rkppl; rkpp != 0; rkpp = rkpp -> next)
-            if(rkpPacket_seq(rkpp, rkpm -> begin) + rkpPacket_appLen(rkpp) > 0)
+        for(rkpp = *rkppl; rkpp != 0; rkpp = rkpp->next)
+            if(rkpPacket_seq(rkpp, rkpm->begin) + rkpPacket_appLen(rkpp) > 0)
                 break;
         if(rkpp == 0)
             break;
-        if(rkpPacket_seq(rkpp, rkpm -> begin) <= 0)
+        if(rkpPacket_seq(rkpp, rkpm->begin) <= 0)
         {
-            p = rkpPacket_appBegin(rkpp) - rkpPacket_seq(rkpp, rkpm -> begin);
+            p = rkpPacket_appBegin(rkpp) - rkpPacket_seq(rkpp, rkpm->begin);
             seq = 0;
         }
         else    // p 会在稍后被设置到包的开头
-            seq = rkpPacket_seq(rkpp, rkpm -> begin);
+            seq = rkpPacket_seq(rkpp, rkpm->begin);
         
         // 开始修改
-        for(; rkpp != 0; rkpp = rkpp -> next)
+        for(; rkpp != 0; rkpp = rkpp->next)
         {
             if(seq != 0)
                 p = rkpPacket_appBegin(rkpp);
-            for(; p != rkpPacket_appEnd(rkpp) && seq < rkpm -> length; p++, seq++)
+            for(; p != rkpPacket_appEnd(rkpp) && seq < rkpm->length; p++, seq++)
                 *p = __rkpMap_map(rkpm, seq);
             rkpPacket_csum(rkpp);
-            if(seq == rkpm -> length)
+            if(seq == rkpm->length)
                 break;
         }
     }
@@ -87,10 +88,10 @@ void rkpMap_modify(struct rkpMap** rkpml, struct rkpPacket** rkppl)
 
 void rkpMap_insert_begin(struct rkpMap** rkpml, struct rkpMap* rkpm)
 {
-    rkpm -> next = *rkpml;
+    rkpm->next = *rkpml;
     *rkpml = rkpm;
-    if(rkpm -> next != 0)
-        rkpm -> next -> prev = rkpm;
+    if(rkpm->next != 0)
+        rkpm->next->prev = rkpm;
 }
 void rkpMap_insert_end(struct rkpMap** rkpml, struct rkpMap* rkpm)
 {
@@ -99,27 +100,27 @@ void rkpMap_insert_end(struct rkpMap** rkpml, struct rkpMap* rkpm)
     else
     {
         struct rkpMap* rkpm2;
-        for(rkpm2 = *rkpml; rkpm2 -> next != 0; rkpm2 = rkpm2 -> next);
-        rkpm2 -> next = rkpm;
-        rkpm -> prev = rkpm2;
+        for(rkpm2 = *rkpml; rkpm2->next != 0; rkpm2 = rkpm2->next);
+        rkpm2->next = rkpm;
+        rkpm->prev = rkpm2;
     }
 }
 void rkpMap_refresh(struct rkpMap** rkpml, int32_t seq)
 {
     struct rkpMap *rkpm1, *rkpm2, *rkpm3;
     // 找到第一个不用删除的映射
-    for(rkpm1 = *rkpml; rkpm1 != 0; rkpm1 = rkpm1 -> next)
-        // if(rkpm -> begin + rkpm -> length > seq)        需要避免绝对值很大的负数小于绝对值很大的正数的情况
-        if((int32_t)(seq - rkpm1 -> begin) - rkpm1 -> length < 0)
+    for(rkpm1 = *rkpml; rkpm1 != 0; rkpm1 = rkpm1->next)
+        // if(rkpm->begin + rkpm->length > seq)        需要避免绝对值很大的负数小于绝对值很大的正数的情况
+        if((int32_t)(seq - rkpm1->begin) - rkpm1->length < 0)
             break;
     // 将这个映射之前的所有映射都删除
     for(rkpm2 = *rkpml; rkpm2 != rkpm1; rkpm2 = rkpm3)
     {
-        rkpm3 = rkpm2 -> next;
+        rkpm3 = rkpm2->next;
         rkpMap_delete(rkpm2);
     }
     // 修改一些指针
     if(rkpm1 != 0)
-        rkpm1 -> prev = 0;
+        rkpm1->prev = 0;
     *rkpml = rkpm1;
 }
\ No newline at end of file
diff --git a/src/rkpPacket.h b/src/rkpPacket.h
index 8747592..e4cff9c 100644
--- a/src/rkpPacket.h
+++ b/src/rkpPacket.h
@@ -135,11 +135,11 @@ unsigned rkpPacket_appLen(const struct rkpPacket* rkpp)
 {
     return ntohs(ip_hdr(rkpp->skb)->tot_len) - ip_hdr(rkpp->skb)->ihl * 4 - tcp_hdr(rkpp->skb)->doff * 4;
 }
-int32_t rkpPacket_seq(const struct rkpPacket* rkpp, const int32_t offset)
+int32_t rkpPacket_seq(const struct rkpPacket* rkpp)
 {
     return (int32_t)ntohl(tcp_hdr(rkpp->skb)->seq) - offset;
 }
-int32_t rkpPacket_seqAck(const struct rkpPacket* rkpp, const int32_t offset)
+int32_t rkpPacket_seqAck(const struct rkpPacket* rkpp)
 {
     return (int32_t)ntohl(tcp_hdr(rkpp->skb)->ack_seq) - offset;
 }
@@ -210,12 +210,7 @@ bool __rkpPacket_makeWriteable(struct rkpPacket* rkpp)
     return true;
 }
 
-void rkpPacket_makeOffset(const struct rkpPacket* rkpp, int32_t* offsetp)
-{
-    *offsetp = rkpPacket_seq(rkpp, 0) + rkpPacket_appLen(rkpp);
-}
-
-void rkpPacket_insert_auto(struct rkpPacket** buff, struct rkpPacket* rkpp, int32_t offset)
+void rkpPacket_insert_auto(struct rkpPacket** buff, struct rkpPacket* rkpp)
 {
     // 如果链表是空的，那么就直接加进去
     if(*buff == 0)