T7973: do not disallow all-zero host part IPv6 host addresses

since they are valid unicast addresses, unlike in IPv4

2 files changed, 59 insertions, 12 deletions

diff --git a/tests/check_ipaddrcheck.c b/tests/check_ipaddrcheck.c
index ebae1e1..c4be8b1 100644
--- a/tests/check_ipaddrcheck.c
+++ b/tests/check_ipaddrcheck.c
@@ -2,7 +2,7 @@
  * check_ipaddrcheck.c: ipaddrcheck unit tests
  *
  * Copyright (C) 2013 Daniil Baturin
- * Copyright (C) 2018-2024 VyOS maintainers and contributors
+ * Copyright (C) 2018-2025 VyOS maintainers and contributors
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 or later as
@@ -289,11 +289,6 @@ START_TEST (test_is_ipv6_host)
     CIDR* good_address_cidr = cidr_from_str(good_address_str_cidr);
     ck_assert_int_eq(is_ipv6_host(good_address_cidr), RESULT_SUCCESS);
     cidr_free(good_address_cidr);
-
-    char* bad_address_str = "2001:db8:f::/48";
-    CIDR* bad_address = cidr_from_str(bad_address_str);
-    ck_assert_int_eq(is_ipv6_host(bad_address), RESULT_FAILURE);
-    cidr_free(bad_address);
 }
 END_TEST
 
@@ -367,15 +362,20 @@ START_TEST (test_is_any_host)
     ck_assert_int_eq(is_any_host(good_address_v6), RESULT_SUCCESS);
     cidr_free(good_address_v6);
 
+    char* good_address_str_v6_all_zero = "2001:db8::/32";
+    CIDR* good_address_v6_all_zero = cidr_from_str(good_address_str_v6_all_zero);
+    ck_assert_int_eq(is_any_host(good_address_v6_all_zero), RESULT_SUCCESS);
+    cidr_free(good_address_v6_all_zero);
+
     char* bad_address_str_v4 = "192.0.2.0/24";
     CIDR* bad_address_v4 = cidr_from_str(bad_address_str_v4);
     ck_assert_int_eq(is_any_host(bad_address_v4), RESULT_FAILURE);
     cidr_free(bad_address_v4);
 
-    char* bad_address_str_v6 = "2001:db8::/32";
-    CIDR* bad_address_v6 = cidr_from_str(bad_address_str_v6);
-    ck_assert_int_eq(is_any_host(bad_address_v6), RESULT_FAILURE);
-    cidr_free(bad_address_v6);
+    char* bad_address_str_v6_unspec = "::/0";
+    CIDR* bad_address_v6_unspec = cidr_from_str(bad_address_str_v6_unspec);
+    ck_assert_int_eq(is_any_host(bad_address_v6_unspec), RESULT_FAILURE);
+    cidr_free(bad_address_v6_unspec);
 }
 END_TEST
 
diff --git a/tests/integration_tests.sh b/tests/integration_tests.sh
index 2c2c72b..9c937df 100755
--- a/tests/integration_tests.sh
+++ b/tests/integration_tests.sh
@@ -3,7 +3,7 @@
 # integration_tests.sh: ipaddrcheck integration tests
 #
 # Copyright (C) 2013 Daniil Baturin
-# Copyright (C) 2018-2024 VyOS maintainers and contributors
+# Copyright (C) 2018-2025 VyOS maintainers and contributors
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 2 or later as
@@ -59,6 +59,28 @@ ipv4_range_negative=(
     192.0.2.1-192.0.2.500
 )
 
+ipv4_interface_address_positive=(
+    192.0.2.1/24
+    192.168.1.0/23
+)
+
+ipv4_interface_address_negative=(
+    192.0.2.0/24 # Network address
+    192.0.2.255/24 # Broadcast
+    224.0.0.1/24 # Multicast
+    0.0.0.0/0 # Unspecified
+)
+
+ipv6_interface_address_positive=(
+    2001:db8::1/64
+    2001:db8::/64
+)
+
+ipv6_interface_address_negative=(
+    ff02::1:2 # Multicast
+    ::/0 # Unspecified
+)
+
 ipv6_range_positive=(
     2001:db8::1-2001:db8::99
 )
@@ -111,10 +133,11 @@ ipv4_host_negative=(
 ipv6_host_positive=(
     2001:db8:1::1/64
     2001:db8:1::1/127
+    2001:db8:1::/64 # All-zero IPv6 addresses are valid host addresses
 )
 
 ipv6_host_negative=(
-    2001:db8::/32
+    ::/0
 )
 
 string="garbage"
@@ -272,7 +295,31 @@ done
 # --is-ipv6-net
 # --is-ipv6-multicast
 # --is-ipv6-link-local
+
 # --is-valid-intf-address
+for address in \
+    ${ipv4_interface_address_positive[*]}
+do
+    assert_raises "$IPADDRCHECK --is-valid-intf-address $address" 0
+done
+
+for address in \
+    ${ipv4_interface_address_negative[*]}
+do
+    assert_raises "$IPADDRCHECK --is-valid-intf-address $address" 1
+done
+
+for address in \
+    ${ipv6_interface_address_positive[*]}
+do
+    assert_raises "$IPADDRCHECK --is-valid-intf-address $address" 0
+done
+
+for address in \
+    ${ipv6_interface_address_negative[*]}
+do
+    assert_raises "$IPADDRCHECK --is-valid-intf-address $address" 1
+done
 
 # --is-ipv4-range
 for range in \