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shadowsocks-libev: add nft_tcp_extra/nft_udp_extra options

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To add extra statement to tcp/udp forward rule, example:

```
config ss_rules 'ss_rules'
    ...
    option nft_tcp_extra 'tcp dport { 80, 443 }' # tcp only forward connections with dport 80 or 443
    option nft_udp_extra 'udp dport { 53 }' # udp only forward connections with dport 53
```

This somewhat restores the old ipt_args functionality.

Signed-off-by: Zhong Jianxin <azuwis@gmail.com>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
(Amend README.md a bit)
This commit is contained in:
Zhong Jianxin 2022-03-02 15:26:55 +08:00 committed by Yousong Zhou
parent b370dd2175
commit 2de9035bda
4 changed files with 9 additions and 3 deletions
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2
net/shadowsocks-libev/Makefile
View File

@ -14,7 +14,7 @@ include $(TOPDIR)/rules.mk
#
PKG_NAME:=shadowsocks-libev
PKG_VERSION:=3.3.5
PKG_RELEASE:=3
PKG_RELEASE:=4
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
PKG_SOURCE_URL:=https://github.com/shadowsocks/shadowsocks-libev/releases/download/v$(PKG_VERSION)

2
net/shadowsocks-libev/README.md
View File

@ -75,6 +75,8 @@ ss-rules now uses nft set for storing addresses/networks. Those set names are a
Note also that `src_ips_xx` and `dst_ips_xx` actually also accepts cidr network representation. Option names are retained in its current form for backward compatibility coniderations
Extra nftables expressions can be specified with `nft_tcp_extra` and `nft_udp_extra` to apply ss_rules only to selected tcp/udp traffics. E.g. `tcp dport { 80, 443 }`, `udp dport 53`, etc.
# incompatible changes
| Commit date | Commit ID | Subject | Comment |

4
net/shadowsocks-libev/files/shadowsocks-libev.init
View File

@ -152,6 +152,8 @@ ss_rules() {
json_add_string o_dst_bypass_file "$dst_ips_bypass_file"
json_add_string o_dst_forward_file "$dst_ips_forward_file"
json_add_string o_dst_default "$dst_default"
json_add_string o_nft_tcp_extra "$nft_tcp_extra"
json_add_string o_nft_udp_extra "$nft_udp_extra"
json_dump -i >"$tmp.json"
if ucode -S -i "$ssrules_uc" -E "$tmp.json" >"$tmp.nft" \
@ -283,6 +285,8 @@ validate_ss_rules_section() {
'src_default:or("bypass", "forward", "checkdst"):checkdst' \
'dst_default:or("bypass", "forward"):bypass' \
'local_default:or("bypass", "forward", "checkdst"):bypass' \
'nft_tcp_extra:string' \
'nft_udp_extra:string' \
'ifnames:maxlength(15)'
}

4
net/shadowsocks-libev/files/ss-rules/chain.uc
View File

@ -97,7 +97,7 @@ chain ss_rules_dst_{{ proto }} {
{% if (proto == "tcp"): %}
chain ss_rules_forward_{{ proto }} {
meta l4proto tcp redirect to :{{ redir_port }};
meta l4proto tcp {{ o_nft_tcp_extra }} redirect to :{{ redir_port }};
}
{% let local_verdict = get_local_verdict(); if (local_verdict): %}
chain ss_rules_local_out {
@ -112,7 +112,7 @@ chain ss_rules_local_out {
{% endif %}
{% elif (proto == "udp"): %}
chain ss_rules_forward_{{ proto }} {
meta l4proto udp meta mark set 1 tproxy to :{{ redir_port }};
meta l4proto udp {{ o_nft_udp_extra }} meta mark set 1 tproxy to :{{ redir_port }};
}
{% endif %}
{% endif %}