8 Commits (f572286bf92c72c62776b26d69a24a8775ff2d39)

Author	SHA1	Message	Date
Maisem Ali	4d6a8224d5	util/linuxfw: fall back to nftables when iptables not found ... When the desired netfilter mode was unset, we would always try to use the `iptables` binary. In such cases if iptables was not found, tailscaled would just crash as seen in #13440. To work around this, in those cases check if the `iptables` binary even exists and if it doesn't fall back to the nftables implementation. Verified that it works on stock Ubuntu 24.04. Updates #5621 Updates #8555 Updates #8762 Fixes #13440 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 months ago
Maisem Ali	05a1f5bf71	util/linuxfw: move detection logic ... Just a refactor to consolidate the firewall detection logic in a single package so that it can be reused in a later commit by containerboot. Updates #9310 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Brad Fitzpatrick	7a5263e6d0	util/linuxfw: rename ErrorFWModeNotSupported ... Go style is for error variables to start with "err" (or "Err") and for error types to end in "Error". Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
KevinLiang10	ae63c51ff1	wgengine/router: add auto selection heuristic for iptables/nftables ... This commit replaces the TS_DEBUG_USE_NETLINK_NFTABLES envknob with a TS_DEBUG_FIREWALL_MODE that should be set to either 'iptables' or 'nftables' to select firewall mode manually, other wise tailscaled will automatically choose between iptables and nftables depending on environment and system availability. updates: #319 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	1 year ago
Brad Fitzpatrick	88cc0ad9f7	util/linuxfw: remove yet-unused code to fix linux/arm64 crash ... The util/linuxfw/iptables.go had a bunch of code that wasn't yet used (in prep for future work) but because of its imports, ended up initializing code deep within gvisor that panicked on init on arm64 systems not using 4KB pages. This deletes the unused code to delete the imports and remove the panic. We can then cherry-pick this back to the branch and restore it later in a different way. A new test makes sure we don't regress in the future by depending on the panicking package in question. Fixes #8658 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
KevinLiang10	6ebd87c669	util/linuxfw: add new arch build constraints ... Exclide GOARCHs including: mips, mips64, mips64le, mipsle, riscv64. These archs are not supported by gvisor.dev/gvisor/pkg/hostarch. Fixes: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	1 year ago
Andrew Dunham	6927a844b1	util/linuxfw: add build constraints excluding GOARCH=arm ... This isn't currently supported due to missing support in upstream dependencies, and also we don't use this package anywhere right now. Just conditionally skip this for now. Fixes #7268 Change-Id: Ie7389c2c0816b39b410c02a7276051a4c18b6450 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Andrew Dunham	ba48ec5e39	util/linuxfw: initial implementation of package ... This package is an initial implementation of something that can read netfilter and iptables rules from the Linux kernel without needing to shell out to an external utility; it speaks directly to the kernel using syscalls and parses the data returned. Currently this is read-only since it only knows how to parse a subset of the available data. Signed-off-by: Andrew Dunham <andrew@tailscale.com> Change-Id: Iccadf5dcc081b73268d8ccf8884c24eb6a6f1ff5	2 years ago