geedge-jira/md/OMPUB-1211.md

# 江苏项目：并联环境rst包发送失败

| ID | Creation Date | Assignee | Status |
|----|----------------|----------|--------|
| OMPUB-1211 | 2024-04-01T14:54:46.000+0800 | 杨威 | 已解决 |


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版本：TSG v24.02
描述：
现场测试发现无效果，查看sapp日志（sysinfo.log）发现rst包全部发送失败。经排查发现调整汇聚分流后全部为单向流，修改sapp配置（单向流发rst）后，大部分rst包发送成功，仍有一小部分rst包发送失败。
 !image-2024-04-01-14-54-33-707.png|thumbnail! **yangwei** commented on *2024-04-01T15:25:15.110+0800*:

背景
 * 至24.02版本，TSGOS上与流量接入环境（并联/串联， vxlan/vlan/mac flipping）相关的设置都由marsio接管，对于sapp而言，统一运行在inline模式
 * 对于inline模式，通常是在接入链路上直接发送，保证构造的数据包（如rst， http 404）能够正确注入线路的前提，是能够正确获取待注入方向的完整信息，包括：
 ** 链路信息（链路号， vxlan，vlan，mac等信息）
 ** 外层封装（MPLP, GTP TEID等信息，同一会话的两个方向可能不一样）
 * sapp默认在会话上的注包模式，要求处理并记录过待注入方向的数据包，从而保证链路信息正确
 ** 例如默认模式下只有TCP SYN，注入S2C侧的RST会失败
 ** 仅有TCP C2S侧的HTTP request流量，注入S2C侧的RST也会失败

问题
 * 对于接入为镜像模式下构造的注入数据包，实际上是通过额外的网络接口，以路由的方式，到达流量通信的双方，因此对于接入链路的信息无要求
 * 对于单向流的镜像接入环境，如果使用sapp默认的注包模式，发送RST包将因为缺乏链路信息而失败。而实际上对于路由注入数据包的场景，单侧的流量，已经具备构造包的所有信息

解决方案
 * 修改sapp的参数，清空./etc/asymmetric_addr_layer.conf文件，放宽对注包地址的要求，仅有单侧信息也支持注入



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**yangwei** commented on *2024-04-01T15:26:33.148+0800*:

对于issue中少部分RST发送失败的现象，原因为在执行TCP RST补救时，未判断注包地址要求，已hotfix更新修复



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**gitlab** commented on *2024-04-02T09:06:09.305+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a merge request|https://git.mesalab.cn/MESA_Platform/sapp/-/merge_requests/387] of [MESA Platform / sapp|https://git.mesalab.cn/MESA_Platform/sapp] on branch [Fix-sapp_rawpkt_ntop|https://git.mesalab.cn/MESA_Platform/sapp/-/tree/Fix-sapp_rawpkt_ntop]:{quote}Fix sapp rawpkt ntop{quote}



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**gitlab** commented on *2024-04-03T16:56:06.498+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a commit|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/commit/ab97068ee8e26063307cfb1274619cbfe33f56a2] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2402-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2402-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T16:57:09.736+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a merge request|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/merge_requests/2333] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2402-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2402-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T17:00:57.001+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a commit|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/commit/d80981e22e26d937849574815fc8857fdd8bd27a] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2404-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2404-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T17:01:21.190+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a merge request|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/merge_requests/2335] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2404-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2404-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T17:32:31.621+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a commit|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/commit/fef6edaf9707f3c9762d80a205423d6f433b7963] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2403-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2403-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T17:33:09.547+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a merge request|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/merge_requests/2340] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2403-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2403-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T18:39:53.117+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a commit|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/commit/ec3b887b7c1e638e59f4ebf6bf59cdba7738c865] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2402-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2402-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T18:42:36.829+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a commit|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/commit/63b0abe08b793d83ada47ba78bad3d1de18adcd3] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2403-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2403-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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**gitlab** commented on *2024-04-03T18:44:12.983+0800*:

[杨威|https://git.mesalab.cn/yangwei] mentioned this issue in [a commit|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/commit/e8d084c0ec275cbbbc4bed8e541721d298c7edb7] of [TSG / tsg-os-buildimage|https://git.mesalab.cn/tsg/tsg-os-buildimage] on branch [Update-2404-sapp-stellar-c-stratum|https://git.mesalab.cn/tsg/tsg-os-buildimage/-/tree/Update-2404-sapp-stellar-c-stratum]:{quote}🎈 perf(sapp,stellar-c,stratum): performance improve{quote}



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