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authorBrandon Philips <brandon@ifup.co>2014-03-20 11:28:12 -0700
committerTom Gundersen <teg@jklm.no>2014-03-21 17:52:42 +0100
commit9765ce69e15fd294db9553777b621515fa57f2c6 (patch)
tree9ca1ebec1b4c2d6d99fba93f18e4e5fca6d50df6 /units/initrd-udevadm-cleanup-db.service.in
parent9e64dd72765ddc2583554ebed24eb2c824564838 (diff)
network: dhcp: create explicit host route to gateway
Some DHCP servers gives you a netmask of 255.255.255.255 so the gateway is not routable. Other DHCP client implementations look through the existing routes to figure out if they should add an explicit host route. See below for a link. However, it makes sense to just create the route explicitly whether it is needed or not since it is explicit, makes the dhcp route entries independent of other entries and saves us from knowing the state of the kernel tables. After patch route table on a machine with a network (common case): default via 10.0.2.2 dev ens3 10.0.2.0/24 dev ens3 proto kernel scope link src 10.0.2.15 10.0.2.2 dev ens3 scope link After patch route table on a machine without a network (this case): default via 10.240.0.1 dev ens4v1 10.240.0.1 dev ens4v1 scope link The code from dhcpcd that works around this issue is on line 637. https://android.googlesource.com/platform/external/dhcpcd/+/master/configure.c
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