A ipv4-static config with the same IPv4 address twice is senseless. A new function zone_config_check_same_setting is introduced. The function provides an easy way to check if a config of the given hook has the same value for a given key. We can now check inside hook_new if an ipv4-static or ipv6-static config with the same value exist and break with an error.

Fixes: #11418

Signed-off-by: Jonatan Schlag jonatan.schlag@ipfire.org --- src/functions/functions.zone | 33 +++++++++++++++++++++++++++++++++ src/hooks/configs/ipv4-static | 5 +++++ src/hooks/configs/ipv6-static | 5 +++++ 3 files changed, 43 insertions(+)

diff --git a/src/functions/functions.zone b/src/functions/functions.zone index a3ca029..1eb492f 100644 --- a/src/functions/functions.zone +++ b/src/functions/functions.zone @@ -1150,6 +1150,39 @@ zone_config_get_new_id() { done }

+zone_config_check_same_setting() { + # This functions checks if a config hook + # with the same setting is already configured for this zone. + # Returns True when yes and False when no. + + assert [ $# -eq 4 ] + + local zone=${1} + local hook=${2} + local key=${3} + local value=${4} + + # The key should be local for this function + local ${key} + local config + + for config in $(zone_configs_list ${zone}); do + # Check if the config is from the given hook, when not continue + if [[ $(zone_config_get_hook "${zone}" "${config}") != ${hook} ]]; then + continue + fi + # Get the value of the key for a given function + zone_config_settings_read "${zone}" "${config}" \ + --ignore-superfluous-settings "${key}" + # Check if the value of the config and the passed value are eqal + if [[ "${value}" == "${!key}" ]]; then + return ${EXIT_TRUE} + fi + done + + return ${EXIT_FALSE} +} + zone_config_get_hook() { assert [ $# -eq 2 ]

diff --git a/src/hooks/configs/ipv4-static b/src/hooks/configs/ipv4-static index 36629e0..ef74991 100644 --- a/src/hooks/configs/ipv4-static +++ b/src/hooks/configs/ipv4-static @@ -99,6 +99,11 @@ hook_parse_cmdline() { exit ${EXIT_CONF_ERROR} fi

+ if zone_config_check_same_setting "${zone}" "ipv4-static" "ADDRESS" "${ADDRESS}"; then + error "An ipv4-static config with the same IPv4 address is already configured" + exit ${EXIT_CONF_ERROR} + fi + if ! isset GATEWAY && zone_is_nonlocal "${zone}"; then warning "You did not configure a gateway for a non-local zone" fi diff --git a/src/hooks/configs/ipv6-static b/src/hooks/configs/ipv6-static index 4c1d7df..c41401c 100644 --- a/src/hooks/configs/ipv6-static +++ b/src/hooks/configs/ipv6-static @@ -49,6 +49,11 @@ hook_parse_cmdline() { shift done

+ if zone_config_check_same_setting "${zone}" "ipv6-static" "ADDRESS" "${ADDRESS}"; then + error "An ipv6-static config with the same IPv6 address is already configured" + exit ${EXIT_CONF_ERROR} + fi + # Store IPv6 address in small format. ADDRESS=$(ipv6_format "${ADDRESS}")