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24 lines
1.0 KiB
24 lines
1.0 KiB
Demonstrations of tcpv4connect.py, the Linux eBPF/bcc version.
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This example traces the kernel function performing active TCP IPv4 connections
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(eg, via a connect() syscall; accept() are passive connections). Some example
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output (IP addresses changed to protect the innocent):
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# ./tcpv4connect.py
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PID COMM SADDR DADDR DPORT
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1479 telnet 127.0.0.1 127.0.0.1 23
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1469 curl 10.201.219.236 54.245.105.25 80
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1469 curl 10.201.219.236 54.67.101.145 80
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This output shows three connections, one from a "telnet" process and two from
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"curl". The output details shows the source address, destination address,
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and destination port. This traces attempted connections: these may have failed.
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The overhead of this tool should be negligible, since it is only tracing the
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kernel function performing a connect. It is not tracing every packet and then
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filtering.
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This is provided as a basic example of TCP tracing. See tools/tcpconnect for a
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more featured version of this example (a tool).
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