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base-files: network.sh: fix a number of IPv6 logic flaws

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* Change network_get_subnet6() to sensibly guess a suitable prefix

  Attempt to return the first non-linklocal, non-ula range, then attempt
  to return the first non-linklocal range and finally fall back to the
  previous behaviour of simply returning the first found item.

* Fix network_get_ipaddrs_all()

  Instead of replicating the flawed logic appending a fixed ":1" suffix
  to IPv6 addresses, rely on network_get_ipaddrs() and network_get_ipaddrs6()
  to build a single list of all interface addresses.

* Fix network_get_subnets6()

  Instead of replicating the flawed logic appending a fixed ":1" suffix
  to IPv6 addresses, rely on the ipv6-prefix-assignment.local-address
  field to figure out the proper network address.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2017-06-08 19:27:46 +02:00
parent d264464404
commit 6426e4edef
1 changed files with 48 additions and 17 deletions
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65
package/base-files/files/lib/functions/network.sh
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@ -45,7 +45,36 @@ network_get_subnet() {
# 1: destination variable
# 2: interface
network_get_subnet6() {
__network_ifstatus "$1" "$2" "['ipv6-address'][0]['address','mask']" "/"
local __nets __addr
if network_get_subnets6 __nets "$2"; then
# Attempt to return first non-fe80::/10, non-fc::/7 range
for __addr in $__nets; do
case "$__addr" in fe[8ab]?:*|f[cd]??:*)
continue
esac
export "$1=$__addr"
return 0
done
# Attempt to return first non-fe80::/10 range
for __addr in $__nets; do
case "$__addr" in fe[8ab]?:*)
continue
esac
export "$1=$__addr"
return 0
done
# Return first item
for __addr in $__nets; do
export "$1=$__addr"
return 0
done
fi
unset "$1"
return 1
}
# determine first IPv6 prefix of given logical interface
@ -94,18 +123,13 @@ network_get_ipaddrs6() {
# 1: destination variable
# 2: interface
network_get_ipaddrs_all() {
local __addr
local __list=""
local __addr __addr6
if __network_ifstatus "__addr" "$2" "['ipv4-address','ipv6-address','ipv6-prefix-assignment'][*].address"; then
for __addr in $__addr; do
case "$__addr" in
*:) __list="${__list:+$__list }${__addr}1" ;;
*) __list="${__list:+$__list }${__addr}" ;;
esac
done
network_get_ipaddrs __addr "$2"
network_get_ipaddrs6 __addr6 "$2"
export "$1=$__list"
if [ -n "$__addr" -o -n "$__addr6" ]; then
export "$1=${__addr:+$__addr }$__addr6"
return 0
fi
@ -124,17 +148,24 @@ network_get_subnets() {
# 1: destination variable
# 2: interface
network_get_subnets6() {
local __addr
local __addr __mask
local __list=""
if __network_ifstatus "__addr" "$2" "['ipv6-address','ipv6-prefix-assignment'][*]['address','mask']" "/ "; then
if __network_ifstatus "__addr" "$2" "['ipv6-address'][*]['address','mask']" "/ "; then
for __addr in $__addr; do
case "$__addr" in
*:/*) __list="${__list:+$__list }${__addr%/*}1/${__addr##*/}" ;;
*) __list="${__list:+$__list }${__addr}" ;;
esac
__list="${__list:+$__list }${__addr}"
done
fi
if __network_ifstatus "__addr" "$2" "['ipv6-prefix-assignment'][*]['local-address'].address" && \
__network_ifstatus "__mask" "$2" "['ipv6-prefix-assignment'][*].mask"; then
for __addr in $__addr; do
__list="${__list:+$__list }${__addr}/${__mask%% *}"
__mask="${__mask#* }"
done
fi
if [ -n "$__list" ]; then
export "$1=$__list"
return 0
fi