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https://github.com/CHN-beta/xmurp-ua.git
synced 2024-10-22 19:38:44 +08:00
我也忘了我写了啥,暂存
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parent
3b54a6da47
commit
80575ccd73
55
src/rkpMap.h
55
src/rkpMap.h
@ -24,16 +24,17 @@ void rkpMap_insert_begin(struct rkpMap**, struct rkpMap*);
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void rkpMap_insert_end(struct rkpMap**, struct rkpMap*);
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// 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
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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
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void rkpMap_refresh(struct rkpMap**, uint32_t);
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// 对于一列序列号递增的映射,删除已经回应的映射。
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struct rkpMap* rkpMap_new(int32_t seql, int32_t seqr)
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struct rkpMap* rkpMap_new(uint32_t begin, uint32_t length)
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{
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struct rkpMap* rkpm = (struct rkpMap*)rkpMalloc(sizeof(struct rkpMap));
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if(rkpm == 0)
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return 0;
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rkpm -> begin = seql;
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rkpm -> length = seqr - seql;
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rkpm -> prev = rkpm -> next = 0;
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rkpm->begin = begin;
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rkpm->length = length;
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rkpm->prev = rkpm->next = 0;
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return rkpm;
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}
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void rkpMap_delete(struct rkpMap* rkpm)
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@ -41,7 +42,7 @@ void rkpMap_delete(struct rkpMap* rkpm)
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rkpFree(rkpm);
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}
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unsigned char __rkpMap_map(const struct rkpMap* rkpm, int32_t seq)
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unsigned char __rkpMap_ua(uint32_t seq)
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{
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if(seq < strlen(str_uaRkp))
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return str_uaRkp[seq];
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@ -51,35 +52,35 @@ unsigned char __rkpMap_map(const struct rkpMap* rkpm, int32_t seq)
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void rkpMap_modify(struct rkpMap** rkpml, struct rkpPacket** rkppl)
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{
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const struct rkpMap* rkpm;
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for(rkpm = *rkpml; rkpm != 0; rkpm = rkpm -> next)
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for(rkpm = *rkpml; rkpm != 0; rkpm = rkpm->next)
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{
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struct rkpPacket* rkpp;
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unsigned char* p = 0;
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int32_t seq;
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uint32_t seq;
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// 尝试确定第一个需要修改的包以及需要修改的开始处
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for(rkpp = *rkppl; rkpp != 0; rkpp = rkpp -> next)
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if(rkpPacket_seq(rkpp, rkpm -> begin) + rkpPacket_appLen(rkpp) > 0)
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for(rkpp = *rkppl; rkpp != 0; rkpp = rkpp->next)
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if(rkpPacket_seq(rkpp, rkpm->begin) + rkpPacket_appLen(rkpp) > 0)
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break;
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if(rkpp == 0)
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break;
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if(rkpPacket_seq(rkpp, rkpm -> begin) <= 0)
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if(rkpPacket_seq(rkpp, rkpm->begin) <= 0)
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{
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p = rkpPacket_appBegin(rkpp) - rkpPacket_seq(rkpp, rkpm -> begin);
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p = rkpPacket_appBegin(rkpp) - rkpPacket_seq(rkpp, rkpm->begin);
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seq = 0;
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}
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else // p 会在稍后被设置到包的开头
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seq = rkpPacket_seq(rkpp, rkpm -> begin);
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seq = rkpPacket_seq(rkpp, rkpm->begin);
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// 开始修改
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for(; rkpp != 0; rkpp = rkpp -> next)
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for(; rkpp != 0; rkpp = rkpp->next)
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{
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if(seq != 0)
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p = rkpPacket_appBegin(rkpp);
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for(; p != rkpPacket_appEnd(rkpp) && seq < rkpm -> length; p++, seq++)
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for(; p != rkpPacket_appEnd(rkpp) && seq < rkpm->length; p++, seq++)
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*p = __rkpMap_map(rkpm, seq);
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rkpPacket_csum(rkpp);
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if(seq == rkpm -> length)
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if(seq == rkpm->length)
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break;
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}
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}
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@ -87,10 +88,10 @@ void rkpMap_modify(struct rkpMap** rkpml, struct rkpPacket** rkppl)
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void rkpMap_insert_begin(struct rkpMap** rkpml, struct rkpMap* rkpm)
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{
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rkpm -> next = *rkpml;
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rkpm->next = *rkpml;
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*rkpml = rkpm;
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if(rkpm -> next != 0)
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rkpm -> next -> prev = rkpm;
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if(rkpm->next != 0)
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rkpm->next->prev = rkpm;
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}
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void rkpMap_insert_end(struct rkpMap** rkpml, struct rkpMap* rkpm)
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{
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@ -99,27 +100,27 @@ void rkpMap_insert_end(struct rkpMap** rkpml, struct rkpMap* rkpm)
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else
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{
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struct rkpMap* rkpm2;
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for(rkpm2 = *rkpml; rkpm2 -> next != 0; rkpm2 = rkpm2 -> next);
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rkpm2 -> next = rkpm;
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rkpm -> prev = rkpm2;
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for(rkpm2 = *rkpml; rkpm2->next != 0; rkpm2 = rkpm2->next);
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rkpm2->next = rkpm;
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rkpm->prev = rkpm2;
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}
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}
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void rkpMap_refresh(struct rkpMap** rkpml, int32_t seq)
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{
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struct rkpMap *rkpm1, *rkpm2, *rkpm3;
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// 找到第一个不用删除的映射
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for(rkpm1 = *rkpml; rkpm1 != 0; rkpm1 = rkpm1 -> next)
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// 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
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if((int32_t)(seq - rkpm1 -> begin) - rkpm1 -> length < 0)
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for(rkpm1 = *rkpml; rkpm1 != 0; rkpm1 = rkpm1->next)
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// 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
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if((int32_t)(seq - rkpm1->begin) - rkpm1->length < 0)
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break;
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// 将这个映射之前的所有映射都删除
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for(rkpm2 = *rkpml; rkpm2 != rkpm1; rkpm2 = rkpm3)
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{
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rkpm3 = rkpm2 -> next;
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rkpm3 = rkpm2->next;
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rkpMap_delete(rkpm2);
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}
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// 修改一些指针
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if(rkpm1 != 0)
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rkpm1 -> prev = 0;
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rkpm1->prev = 0;
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*rkpml = rkpm1;
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}
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@ -135,11 +135,11 @@ unsigned rkpPacket_appLen(const struct rkpPacket* rkpp)
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{
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return ntohs(ip_hdr(rkpp->skb)->tot_len) - ip_hdr(rkpp->skb)->ihl * 4 - tcp_hdr(rkpp->skb)->doff * 4;
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}
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int32_t rkpPacket_seq(const struct rkpPacket* rkpp, const int32_t offset)
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int32_t rkpPacket_seq(const struct rkpPacket* rkpp)
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{
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return (int32_t)ntohl(tcp_hdr(rkpp->skb)->seq) - offset;
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}
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int32_t rkpPacket_seqAck(const struct rkpPacket* rkpp, const int32_t offset)
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int32_t rkpPacket_seqAck(const struct rkpPacket* rkpp)
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{
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return (int32_t)ntohl(tcp_hdr(rkpp->skb)->ack_seq) - offset;
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}
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@ -210,12 +210,7 @@ bool __rkpPacket_makeWriteable(struct rkpPacket* rkpp)
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return true;
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}
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void rkpPacket_makeOffset(const struct rkpPacket* rkpp, int32_t* offsetp)
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{
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*offsetp = rkpPacket_seq(rkpp, 0) + rkpPacket_appLen(rkpp);
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}
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void rkpPacket_insert_auto(struct rkpPacket** buff, struct rkpPacket* rkpp, int32_t offset)
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void rkpPacket_insert_auto(struct rkpPacket** buff, struct rkpPacket* rkpp)
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{
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// 如果链表是空的,那么就直接加进去
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if(*buff == 0)
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