| commit | 29f13cb6490754babc4058fa2e432c23471f53a9 | |
| author | Bill Yuan <bycn82@dragonflybsd.org> | |
| Mon, 9 Apr 2018 13:02:55 +0000 (9 13:02 +0000) | ||
| committer | Bill Yuan <bycn82@dragonflybsd.org> | |
| Mon, 9 Apr 2018 13:02:55 +0000 (9 13:02 +0000) | ||
| tree | 78f9f811400e0398e3ce58e8c91f45f4991ffe8f | treesnapshot (tar.gz zip) |
| parent | a9e52100a5db864a9de6697e684bafd6283a0901 | commitdiff |
ipfw3nat: nat func to replace the src or dst
The `src` will be replaced by `alias` when a packet is leaving the system.
Hence, the packet is from `src` to `dst` before been translated. And after
been translated, the packet is from `alias` to `dst`.
The state for outgoing packet will be stored in the nat_context of current
CPU. But due to the nature of the NAT, the returning packet may be handled
by another CPU. Hence, a state for the returning packet will be prepared and
store into the nat_context of the right CPU.
The `src` will be replaced by `alias` when a packet is leaving the system.
Hence, the packet is from `src` to `dst` before been translated. And after
been translated, the packet is from `alias` to `dst`.
The state for outgoing packet will be stored in the nat_context of current
CPU. But due to the nature of the NAT, the returning packet may be handled
by another CPU. Hence, a state for the returning packet will be prepared and
store into the nat_context of the right CPU.
| sys/net/ipfw3_nat/ip_fw3_nat.c | diffblobblamehistory |