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firewall: backport patch for mss clamping in both directions 

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
This commit is contained in:
Yousong Zhou 2020-07-26 22:34:49 +08:00
parent 2ba95d287e
commit 7bd437cc9f
2 changed files with 34 additions and 1 deletions
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2
package/network/config/firewall/Makefile
View File

@ -9,7 +9,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=firewall
PKG_RELEASE:=1
PKG_RELEASE:=2
PKG_SOURCE_PROTO:=git
PKG_SOURCE_URL=$(PROJECT_GIT)/project/firewall3.git

33
package/network/config/firewall/patches/0001-zones-apply-tcp-mss-clamping-also-on-ingress-path.patch Normal file
View File

@ -0,0 +1,33 @@
From c9f48cb3bd0e14fec8ad71c3baef7c280a390b4f Mon Sep 17 00:00:00 2001
From: Yousong Zhou <yszhou4tech@gmail.com>
Date: Fri, 24 Jul 2020 12:52:59 +0800
Subject: [PATCH] zones: apply tcp mss clamping also on ingress path
Fixes FS#3231
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Acked-by: Jo-Philipp Wich <jo@mein.io>
(cherry picked from commit e9b90dfac2225927c035f6a76277b850c282dc9a)
---
zones.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/zones.c b/zones.c
index 505ab20..4656f88 100644
--- a/zones.c
+++ b/zones.c
@@ -553,6 +553,14 @@ print_interface_rule(struct fw3_ipt_handle *handle, struct fw3_state *state,
fw3_ipt_rule_target(r, "TCPMSS");
fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
fw3_ipt_rule_replace(r, "FORWARD");
+
+ r = fw3_ipt_rule_create(handle, &tcp, dev, NULL, sub, NULL);
+ fw3_ipt_rule_addarg(r, false, "--tcp-flags", "SYN,RST");
+ fw3_ipt_rule_addarg(r, false, "SYN", NULL);
+ fw3_ipt_rule_comment(r, "Zone %s MTU fixing", zone->name);
+ fw3_ipt_rule_target(r, "TCPMSS");
+ fw3_ipt_rule_addarg(r, false, "--clamp-mss-to-pmtu", NULL);
+ fw3_ipt_rule_replace(r, "FORWARD");
}
}
else if (handle->table == FW3_TABLE_RAW)