snmp
操作一下
检查下 /proc/net 的两个文件:
🧀 cat snmp
Ip: Forwarding DefaultTTL InReceives InHdrErrors InAddrErrors ForwDatagrams InUnknownProtos InDiscards InDelivers OutRequests OutDiscards OutNoRoutes ReasmTimeout ReasmReqds R
easmOKs ReasmFails FragOKs FragFails FragCreates OutTransmits
Ip: 1 64 93312031 18 0 0 0 0 91627381 66278051 964 115708 0 2 1 0 0 0 0 66278051
Icmp: InMsgs InErrors InCsumErrors InDestUnreachs InTimeExcds InParmProbs InSrcQuenchs InRedirects InEchos InEchoReps InTimestamps InTimestampReps InAddrMasks InAddrMaskReps O
utMsgs OutErrors OutRateLimitGlobal OutRateLimitHost OutDestUnreachs OutTimeExcds OutParmProbs OutSrcQuenchs OutRedirects OutEchos OutEchoReps OutTimestamps OutTimestampReps O
utAddrMasks OutAddrMaskReps
Icmp: 17913 5931 0 17537 0 0 0 0 342 34 0 0 0 0 35254 0 402 3156 34742 0 0 0 0 170 342 0 0 0 0
IcmpMsg: InType0 InType3 InType8 OutType0 OutType3 OutType8
IcmpMsg: 34 17537 342 342 34742 170
Tcp: RtoAlgorithm RtoMin RtoMax MaxConn ActiveOpens PassiveOpens AttemptFails EstabResets CurrEstab InSegs OutSegs RetransSegs InErrs OutRsts InCsumErrors
Tcp: 1 200 120000 -1 564159 148221 3693 19921 112 78525027 103213120 313403 587 67769 0
Udp: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors InCsumErrors IgnoredMulti MemErrors
Udp: 72574711 32340 3457 1998611 3457 2 0 0 0
UdpLite: InDatagrams NoPorts InErrors OutDatagrams RcvbufErrors SndbufErrors InCsumErrors IgnoredMulti MemErrors
UdpLite: 0 0 0 0 0 0 0 0 0
🧀 cat snmp6
Ip6InReceives 331662
Ip6InHdrErrors 0
Ip6InTooBigErrors 0
Ip6InNoRoutes 0
Ip6InAddrErrors 0
Ip6InUnknownProtos 0
Ip6InTruncatedPkts 0
Ip6InDiscards 0
Ip6InDelivers 113012
Ip6OutForwDatagrams 0
Ip6OutRequests 126113
Ip6OutDiscards 308
Ip6OutNoRoutes 596367
Ip6ReasmTimeout 0
Ip6ReasmReqds 0
Ip6ReasmOKs 0
Ip6ReasmFails 0
Ip6FragOKs 0
Ip6FragFails 0
Ip6FragCreates 0
Ip6InMcastPkts 67044
Ip6OutMcastPkts 13101
Ip6InOctets 568655172
Ip6OutOctets 548643176
Ip6InMcastOctets 7069630
Ip6OutMcastOctets 868576
Ip6InBcastOctets 0
Ip6OutBcastOctets 0
Ip6InNoECTPkts 331662
Ip6InECT1Pkts 0
Ip6InECT0Pkts 0
Ip6InCEPkts 0
Ip6OutTransmits 126113
Icmp6InMsgs 88
Icmp6InErrors 0
Icmp6OutMsgs 8792
Icmp6OutErrors 0
Icmp6InCsumErrors 0
Icmp6OutRateLimitHost 0
Icmp6InDestUnreachs 88
Icmp6InPktTooBigs 0
Icmp6InTimeExcds 0
Icmp6InParmProblems 0
Icmp6InEchos 0
Icmp6InEchoReplies 0
Icmp6InGroupMembQueries 0
Icmp6InGroupMembResponses 0
Icmp6InGroupMembReductions 0
Icmp6InRouterSolicits 0
Icmp6InRouterAdvertisements 0
Icmp6InNeighborSolicits 0
Icmp6InNeighborAdvertisements 0
Icmp6InRedirects 0
Icmp6InMLDv2Reports 0
Icmp6OutDestUnreachs 88
Icmp6OutPktTooBigs 0
Icmp6OutTimeExcds 0
Icmp6OutParmProblems 0
Icmp6OutEchos 0
Icmp6OutEchoReplies 0
Icmp6OutGroupMembQueries 0
Icmp6OutGroupMembResponses 0
Icmp6OutGroupMembReductions 0
Icmp6OutRouterSolicits 1880
Icmp6OutRouterAdvertisements 0
Icmp6OutNeighborSolicits 22
Icmp6OutNeighborAdvertisements 0
Icmp6OutRedirects 0
Icmp6OutMLDv2Reports 6802
Icmp6InType1 88
Icmp6OutType1 88
Icmp6OutType133 1880
Icmp6OutType135 22
Icmp6OutType143 6802
Udp6InDatagrams 0
Udp6NoPorts 88
Udp6InErrors 0
Udp6OutDatagrams 88
Udp6RcvbufErrors 0
Udp6SndbufErrors 0
Udp6InCsumErrors 0
Udp6IgnoredMulti 0
Udp6MemErrors 0
UdpLite6InDatagrams 0
UdpLite6NoPorts 0
UdpLite6InErrors 0
UdpLite6OutDatagrams 0
UdpLite6RcvbufErrors 0
UdpLite6SndbufErrors 0
UdpLite6InCsumErrors 0
UdpLite6MemErrors 0
基本文档
-
Documentation/networking/snmp_counter.rst
-
https://info.support.huawei.com/info-finder/encyclopedia/zh/SNMP.html
-
- 讲的很清楚了，也就是一个用户态的包，然后靠 kernel 的信息导出
snmp 还可以限制上网，应该是靠这个实现的: net/netfilter/nf_conntrack_snmp.c
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