From c6d3a62919a7f993be625391d8593c84423aa021 Mon Sep 17 00:00:00 2001
From: Roger Pueyo Centelles <roger.pueyo@guifi.net>
Date: Wed, 2 Nov 2016 13:18:01 +0100
Subject: [PATCH] gre: add different per-protocol prefixes to GRE-TAP IPv4/6
tunnel interfaces.
This commit modifies the /lib/netifd/proto/gre.sh script so that, when
GRE-TAP tunnels are created, either IPv4 or IPv6, the prefix before the chosen
interface name contains the "tap" substring, to differentiate them from non-TAP
GRE tunnels.
Right now, both GRE and GRE-TAP tunnel (either IPv4 or IPv6) interfaces defined
in /etc/config/network are named equally ("gre-"+$ifname or "grev6"+$ifname)
upon creation. For instance, the following tunnels:
config interface 'tuna'
option peeraddr '172.30.22.1'
option proto 'gre'
config interface 'tunb'
option peeraddr '192.168.233.4'
option proto 'gretap'
config interface 'tunc'
option peer6addr 'fdc5:7c9e:e93d:45af::1'
option proto 'grev6'
config interface 'tund'
option peer6addr 'fdc0:6071:1348:31ff::2'
option proto 'grev6tap'
are named, respectively, "gre-tuna", "gre-tunb", "grev6-tunc" and "grev6-tund".
The current change makes that each GRE tunnel interface of the four different
types available (gre, gretap, grev6 and grev6tap) gets a different prefix.
Therefore, the abovementioned tunnels will be named, respectively:
"gre4-tuna", "gre4t-tunb", "gre6-tunc" and "gre6t-tund".
This is coherent with other types of virtual interfaces (i.e. PPP, PPPoE, PPPoA)
where the whole protocol name is used. For instance, a PPPoA interface named
"p1" and a PPPoE interface named "p2" will respectively appear as "pppoa-p1"
and "pppoe-p2", not as "ppp-p1" and "ppp-p2").
Since Linux interfaces names are limited to 15 characters, these prefixes leave,
for the worst case (TAP tunnels), 9 characters for the actual name.
Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
---
package/network/config/gre/Makefile | 2 +-
package/network/config/gre/files/gre.sh | 26 +++++++++++++++++++------
2 files changed, 21 insertions(+), 7 deletions(-)
diff --git a/package/network/config/gre/Makefile b/package/network/config/gre/Makefile
index a6b4cac559..90f92d4da7 100644
--- a/package/network/config/gre/Makefile
+++ b/package/network/config/gre/Makefile
@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=gre
PKG_VERSION:=1
-PKG_RELEASE:=5
+PKG_RELEASE:=6
PKG_LICENSE:=GPL-2.0
include $(INCLUDE_DIR)/package.mk
diff --git a/package/network/config/gre/files/gre.sh b/package/network/config/gre/files/gre.sh
index 58db1d1381..cd327ea2da 100755
--- a/package/network/config/gre/files/gre.sh
+++ b/package/network/config/gre/files/gre.sh
@@ -84,7 +84,14 @@ gre_setup() {
[ -z "$df" ] && df="1"
- gre_generic_setup $cfg $mode $ipaddr $peeraddr "gre-$cfg"
+ case "$mode" in
+ gretapip)
+ gre_generic_setup $cfg $mode $ipaddr $peeraddr "gre4t-$cfg"
+ ;;
+ *)
+ gre_generic_setup $cfg $mode $ipaddr $peeraddr "gre4-$cfg"
+ ;;
+ esac
}
proto_gre_setup() {
@@ -102,7 +109,7 @@ proto_gretap_setup() {
gre_setup $cfg "gretapip"
json_init
- json_add_string name "gre-$cfg"
+ json_add_string name "gre4t-$cfg"
json_add_boolean link-ext 0
json_close_object
@@ -155,7 +162,14 @@ grev6_setup() {
fi
}
- gre_generic_setup $cfg $mode $ip6addr $peer6addr "grev6-$cfg"
+ case "$mode" in
+ gretapip6)
+ gre_generic_setup $cfg $mode $ip6addr $peer6addr "gre6t-$cfg"
+ ;;
+ *)
+ gre_generic_setup $cfg $mode $ip6addr $peer6addr "gre6-$cfg"
+ ;;
+ esac
}
proto_grev6_setup() {
@@ -173,7 +187,7 @@ proto_grev6tap_setup() {
grev6_setup $cfg "gretapip6"
json_init
- json_add_string name "grev6-$cfg"
+ json_add_string name "gre6t-$cfg"
json_add_boolean link-ext 0
json_close_object
@@ -203,7 +217,7 @@ proto_gre_teardown() {
proto_gretap_teardown() {
local cfg="$1"
- gretap_generic_teardown "gre-$cfg"
+ gretap_generic_teardown "gre4t-$cfg"
}
proto_grev6_teardown() {
@@ -213,7 +227,7 @@ proto_grev6_teardown() {
proto_grev6tap_teardown() {
local cfg="$1"
- gretap_generic_teardown "grev6-$cfg"
+ gretap_generic_teardown "gre6t-$cfg"
}
gre_generic_init_config() {
--
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