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baidu / dperf

dperf is a 100Gbps network load tester.
https://dperf.org
Apache License 2.0
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dperf server 对syn包回复reset，正常吗 #262

Closed panzhengyu closed 1 year ago

panzhengyu commented 1 year ago

hi， 我正在测试lvs性能，发现从lvs发到dperf server的syn包，dperf server回复reset，这个正常吗？

17:15:46.586367 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.57357: Flags [R.], seq 0, ack 335509168, win 0, length 0
17:15:46.586368 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.57358: Flags [R.], seq 0, ack 1483968570, win 0, length 0
17:15:46.586373 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.24866: Flags [R.], seq 0, ack 866049898, win 0, length 0
17:15:46.586375 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.24869: Flags [R.], seq 0, ack 501669915, win 0, length 0
17:15:46.587106 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.8020 > 192.168.6.103.80: Flags [S], seq 1177426650, win 58400, options [mss 1460,nop,wscale 13], length 0
17:15:46.587107 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.8019 > 192.168.6.103.80: Flags [S], seq 1222961236, win 58400, options [mss 1460,nop,wscale 13], length 0
17:15:46.587167 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.8019: Flags [R.], seq 0, ack 1222961237, win 0, length 0
17:15:46.587175 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.8020: Flags [R.], seq 0, ack 1177426651, win 0, length 0
17:15:46.587395 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.41831 > 192.168.6.103.80: Flags [S], seq 2070928559, win 58400, options [mss 1460,nop,wscale 13], length 0
17:15:46.587455 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.24880 > 192.168.6.103.80: Flags [S], seq 1225490736, win 58400, options [mss 1460,nop,wscale 13], length 0
17:15:46.587467 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.41831: Flags [R.], seq 0, ack 2070928560, win 0, length 0
17:15:46.587503 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.57370 > 192.168.6.103.80: Flags [S], seq 815778105, win 58400, options [mss 1460,nop,wscale 13], length 0
17:15:46.587566 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.24880: Flags [R.], seq 0, ack 1225490737, win 0, length 0
17:15:46.587666 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.57370: Flags [R.], seq 0, ack 815778106, win 0, length 0
^C17:15:46.588315 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.8028 > 192.168.6.103.80: Flags [S], seq 1553691724, win 58400, options [mss 1460,nop,wscale 13], length 0

我的dperf client配置是

mode        client
socket_mem      2048
cpu         0
slow_start      60
tx_burst        128
launch_num      10
payload_size    1
duration    90s
protocol    tcp
cps         10k
port        0000:af:00.0    192.168.0.30 192.168.7.254 30:0d:9e:42:5d:50
client      192.168.3.0     50
server      192.168.5.1      1
listen      80              1

我的dperf server配置是

mode        server
socket_mem      2048
cpu         8-14
tx_burst        128
payload_size    1
duration    10m
port            0000:af:00.1    192.168.1.30   192.168.7.254 00:00:64:01:01:01
client          192.168.3.0     200
server          192.168.6.100   7
listen          80              1
pengjianzhang commented 1 year ago

不正常，这样修改一下试试 client 192.168.3.0 -> client 192.168.3.1

如果喜欢dperf，请给项目加个star，谢谢。也请向周围小伙伴推荐一下

panzhengyu commented 1 year ago

已经star，是在dperf server还是在dperf client上修改，这样修改的目的是什么啊

panzhengyu commented 1 year ago

lvs使用的fullnat模式，目前lvs转发到dperf server的源Ip只有一个192.168.3.100。

pengjianzhang commented 1 year ago

可能是一个Bug，client, server上都修改， 192.168.3.0 不是合法IP，可能引起了一个bug

panzhengyu commented 1 year ago

修改后，没有生效。 我的本意是分配了一个大段IP 192.168.0.0/21用来压测，网关是192.168.7.254。 对于，dperf client 使用IP 192.168.3.1- 192.168.3.50。 压测的lvs server ip是192.168.5.1。 dperf server使用IP 192.168.6.100-192.168.6.106。从lvs到derf server使用lvs的local IP 192.168.3.100。

pengjianzhang commented 1 year ago

你server上 这么配试试 client 192.168.3.100 1

panzhengyu commented 1 year ago

还是dperf server直接对lvs发送过来的syn包回复reset。

目前我的dperf client配置是

mode        client
socket_mem      2048
cpu         0
slow_start      60
tx_burst        128
launch_num      10
payload_size    1
duration    90s
protocol    tcp
cps         100k
port        0000:af:00.0    192.168.0.30 192.168.7.254 30:0d:9e:42:5d:50
client      192.168.3.1     50
server      192.168.5.1      1
listen      80              1

我的dperf server配置是

mode        server
socket_mem      2048
cpu         8-14
tx_burst        128
payload_size    1
duration    10m
port            0000:af:00.1    192.168.1.30   192.168.7.254 00:00:64:01:01:01
client          192.168.3.100   1
server          192.168.6.100   7
listen          80              1
pengjianzhang commented 1 year ago

CPS 设置100 看看 server只用一个CPU试试 是主干代码吗

panzhengyu commented 1 year ago

cpu只使用1个的话，报错

./build/dperf -c test/http/server-cps.conf
Error: cpu num less than server ip num at 'client' mode

使用的是v1.4.0 tag的代码。

panzhengyu commented 1 year ago

CPS 设置100 同样报错

pengjianzhang commented 1 year ago

贴一下抓包

panzhengyu commented 1 year ago 
 tcpdump -nnee -i ens2f1 host 192.168.6.103
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens2f1, link-type EN10MB (Ethernet), capture size 262144 bytes
18:23:24.069574 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.9 > 192.168.6.103.80: Flags [S], seq 1554452105, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.069704 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.9: Flags [R.], seq 0, ack 1554452106, win 0, length 0
18:23:24.277823 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.14 > 192.168.6.103.80: Flags [S], seq 706016934, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.277880 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.19 > 192.168.6.103.80: Flags [S], seq 1368424217, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.277922 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.14: Flags [R.], seq 0, ack 706016935, win 0, length 0
18:23:24.434076 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.30 > 192.168.6.103.80: Flags [S], seq 653853081, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.434105 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.19: Flags [R.], seq 0, ack 1368424218, win 0, length 0
18:23:24.434203 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.30: Flags [R.], seq 0, ack 653853082, win 0, length 0
18:23:24.590317 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.39 > 192.168.6.103.80: Flags [S], seq 1438276, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.590376 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.36 > 192.168.6.103.80: Flags [S], seq 1317208719, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.590411 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.36: Flags [R.], seq 0, ack 1317208720, win 0, length 0
18:23:24.590411 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.39: Flags [R.], seq 0, ack 1438277, win 0, length 0
18:23:24.746570 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.46 > 192.168.6.103.80: Flags [S], seq 2056905421, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.746654 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.47 > 192.168.6.103.80: Flags [S], seq 105442140, win 58400, options [mss 1460,nop,wscale 13], length 0
18:23:24.746705 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.46: Flags [R.], seq 0, ack 2056905422, win 0, length 0
18:23:24.746712 3c:fd:fe:b1:c6:99 > 28:de:e5:7f:ea:21, ethertype IPv4 (0x0800), length 60: 192.168.6.103.80 > 192.168.3.100.47: Flags [R.], seq 0, ack 105442141, win 0, length 0
^C
16 packets captured
16 packets received by filter
0 packets dropped by kernel

28:de:e5:7f:ea:21是lvs 的mac address 3c:fd:fe:b1:c6:99 是网关192.168.7.254的mac address 192.168.6.103是dperf server的地址 192.168.3.100是lvs的地址 是在lvs节点抓的

pengjianzhang commented 1 year ago

server只用1个CPU， cpu 8 server 192.168.6.100 1

检查一下你网络里面是不是有重复IP 贴一下dperf server的输出截图，看看这个rst是不是dperf server发出的

panzhengyu commented 1 year ago

没有IP冲突。 我没开启dperf server的时候， lvs只抓到arp包。没有响应，说明没有冲突。

tcpdump -nnee -i ens2f1 host 192.168.6.103
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on ens2f1, link-type EN10MB (Ethernet), capture size 262144 bytes

18:52:45.908549 28:de:e5:7f:ea:21 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.6.103 tell 192.168.3.100, length 28
18:52:46.911288 28:de:e5:7f:ea:21 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.6.103 tell 192.168.3.100, length 28
18:52:47.913287 28:de:e5:7f:ea:21 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.6.103 tell 192.168.3.100, length 28
18:52:48.971017 28:de:e5:7f:ea:21 > ff:ff:ff:ff:ff:ff, ethertype ARP (0x0806), length 42: Request who-has 192.168.6.103 tell 192.168.3.100, length 28

这是dperf server的输出截图。

-------------
Test Finished
-------------
pktRx   14,775,788         pktTx    13,195,419         bitsRx   7,303,646,096      bitsTx  5,801,801,168      dropTx  0
tcpRx   14,774,491         tcpTx    1,583,954          udpRx    0                  udpTx   0
arpRx   557                arpTx    172                icmpRx   0                  icmpTx  0
tosRx   0                  otherRx  740                badRx    0
synRx   1,581,938          synTx    1,583,954          finRx    0                  finTx   0                  rstRx   1,581,260  rstTx 11,611,293
synRt   2,019              finRt    0                  ackRt    0                  pushRt  0
tcpDrop 0                  udpDrop  0
skOpen  1,581,935          skClose  1,581,933          skCon    2                  skErr   673
httpGet 0                  http2XX  0                  httpErr  0
ierrors 0                  oerrors  0                  imissed  0
pengjianzhang commented 1 year ago

估计是端口重用太快了 你测一下并发 cc 1000 cps 100

panzhengyu commented 1 year ago

dperf server改成只有1个server后， dperf client客户端cc 1000 cps 100 keepalive 1s配置， lvs抓发到dperf server，只有syn包，dperf server 不回应。

19:19:42.318649 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.142 > 192.168.6.103.80: Flags [S], seq 693888891, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:42.318650 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.144 > 192.168.6.103.80: Flags [S], seq 133489566, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:42.318740 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.140 > 192.168.6.103.80: Flags [S], seq 1253238617, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:42.318842 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.138 > 192.168.6.103.80: Flags [S], seq 1813637943, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:43.318642 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.143 > 192.168.6.103.80: Flags [S], seq 1842348294, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:43.318648 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.145 > 192.168.6.103.80: Flags [S], seq 1767156026, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:43.318739 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.141 > 192.168.6.103.80: Flags [S], seq 497867500, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:43.318848 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.139 > 192.168.6.103.80: Flags [S], seq 2010706886, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:44.318652 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.144 > 192.168.6.103.80: Flags [S], seq 133489566, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:44.318656 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.146 > 192.168.6.103.80: Flags [S], seq 1963176393, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:44.318740 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.142 > 192.168.6.103.80: Flags [S], seq 693888891, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:44.318843 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.140 > 192.168.6.103.80: Flags [S], seq 1253238617, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:45.318651 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.145 > 192.168.6.103.80: Flags [S], seq 1767156026, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:45.318655 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.147 > 192.168.6.103.80: Flags [S], seq 1918690383, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:45.318739 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.143 > 192.168.6.103.80: Flags [S], seq 1842348294, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:45.318842 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.141 > 192.168.6.103.80: Flags [S], seq 497867500, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:46.318640 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.146 > 192.168.6.103.80: Flags [S], seq 1963176393, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:46.318650 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.148 > 192.168.6.103.80: Flags [S], seq 2114710750, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:46.318737 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.144 > 192.168.6.103.80: Flags [S], seq 133489566, win 58400, options [mss 1460,nop,wscale 13], length 0
19:19:46.318839 28:de:e5:7f:ea:21 > 3c:fd:fe:b1:c6:99, ethertype IPv4 (0x0800), length 62: 192.168.3.100.142 > 192.168.6.103.80: Flags [S], seq 693888891, win 58400, options [mss 1460,nop,wscale 13], length 0
panzhengyu commented 1 year ago

@pengjianzhang 能指导一下我在那个地方断点debug dperf代码吗

pengjianzhang commented 1 year ago

server需要配置keepalive 2s

pengjianzhang commented 1 year ago

邮箱给我发个腾讯会议 一起看下

panzhengyu commented 1 year ago

好的

panzhengyu commented 1 year ago

可以了，感谢 @pengjianzhang 我把dperf client和dperf server的gateway网关地址配置错了。gatway 应该配成lvs的mac地址。我配成和dperf client、dperf server、lvs之外的一个网关地址了。网关不能转发包导致。

pengjianzhang commented 1 year ago

不客气~~ 能否把你的问题写成一个博客文章，最好能画图，把连接发给我，方便其他小伙伴参考！ 另外，请内部宣传一下。谢谢~

panzhengyu commented 1 year ago

好的

panzhengyu commented 1 year ago

继续请教一下， 我的目前dperf server配置是

mode        server
socket_mem      2048
cpu         2-3
tx_burst        128
payload_size    1
duration    10m
keepalive 2s
port            0000:af:00.1    192.168.6.103   192.168.7.253 28:de:e5:7f:ea:21
client          192.168.3.100   1
server          192.168.6.103   2
listen          80              1

转发到192.168.6.103的都能正常回复，转发到192.168.6.104的都回复reset。 server 192.168.6.103 2 配置，不就是代表配置两个IP，192.168.6.103和192.168.6.104吗？ 为什么192.168.6.104都回复reset？ 另外，port配置中的IP作用是什么，和server中的IP有什么区别？

pengjianzhang commented 1 year ago

server 192.168.6.103 2 配置，不就是代表配置两个IP，192.168.6.103和192.168.6.104吗？ 是 为什么192.168.6.104都回复reset？ 不知道

另外，port配置中的IP作用是什么，和server中的IP有什么区别？ ARP寻址，监听，详见配置文档

panzhengyu commented 1 year ago

reset 原因是socket_server_lookup 返回NULL，这个是为什么啊

static inline void tcp_server_process(struct work_space *ws, struct rte_mbuf *m)
{
    struct iphdr *iph = mbuf_ip_hdr(m);
    struct tcphdr *th = mbuf_tcp_hdr(m);
    uint8_t flags = th->th_flags;
    struct socket *sk = NULL;

    sk = socket_server_lookup(&ws->socket_table, iph, th);
    if (unlikely(sk == NULL)) {
        if (ws->kni && work_space_is_local_addr(ws, m)) {
            return kni_recv(ws, m);
        }
        MBUF_LOG(m, "drop-no-socket");
        if (g_config.tcp_rst) {
            tcp_reply_rst(ws, m);
        } else {
            net_stats_tcp_drop();
            mbuf_free2(m);
        }
        return;
    }
pengjianzhang commented 1 year ago

IP，端口不匹配

panzhengyu commented 1 year ago

这个一般是为什么不匹配啊，跟什么有关系啊

static inline struct socket *socket_common_lookup(const struct socket_table *st, uint32_t client_ip, uint32_t server_ip
    , uint16_t client_port, uint16_t server_port)
{
    uint32_t client_low_2byte = ntohl(client_ip) & 0xffff;
    struct socket_port_table *t = st->ht[client_low_2byte];
    uint16_t client_port_host = ntohs(client_port);
    uint16_t server_port_host = ntohs(server_port);

    if (likely(t != NULL)  && (server_ip == st->server_ip) && (client_port != 0) &&
        (server_port_host >= st->port_min) && (server_port_host <= st->port_max)) {
        return socket_port_table_get(st, t, client_port_host, server_port_host);
    }

    return NULL;
}

发现是这个函数 server_ip == st->server_ip 条件不满足，是为什么啊