Hello,
For the project i'm doing, i must know how the Linux kernel allocate sockets source port (from the dynamic range of the (2**16)-1 ports). I looked on the Web but it's really hard to find the algoritm of the source port allocation...
Check the source ;). There is a proc-fs entry which relates to the source port range setting. Over this entry point you get in case of TCP sockets to ../net/ipv4/tcp_ipv4.c:tcp_v4_get_port(...). For UDP sockets you need to peek into ../net/ipv4/udp.c:udp_v4_get_port().
Someone maybe know how it's work or if there is a paper on the web that explain this source port selection ?
Not likely, but reading the source should help. You can set the local port range via /proc/sys/net/ipv4/ip_local_port_range. It's documented.
HTH and best regards,
Roberto Nibali, ratz
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