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platform: add nm_platform_ip{4,6,}_address_get_scope() helper

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This commit is contained in:
Thomas Haller
2022-07-22 20:28:35 +02:00
parent dc98ab807c
commit e25b7a579e
1 changed files with 31 additions and 0 deletions
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31
src/libnm-platform/nm-platform.h
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@@ -1549,6 +1549,37 @@ nm_platform_route_type_uncoerce(guint8 type_coerced)
return nm_platform_route_type_coerce(type_coerced);
}
static inline guint8
nm_platform_ip4_address_get_scope(in_addr_t addr)
{
/* For IPv4 addresses, we can set any scope we want (for any address).
* However, there are scopes that make sense based on the address,
* so choose those. */
return nm_utils_ip4_address_is_loopback(addr) ? (254 /* RT_SCOPE_HOST */)
: nm_utils_ip4_address_is_link_local(addr) ? (253 /* RT_SCOPE_LINK */)
: (0 /* RT_SCOPE_UNIVERSE */);
}
static inline guint8
nm_platform_ip6_address_get_scope(const struct in6_addr *addr)
{
/* For IPv6, kernel does not allow userspace to configure the address scope.
* Instead, it is calculated based on the address. See rt_scope() and
* ipv6_addr_scope(). We do the same here. */
return IN6_IS_ADDR_LOOPBACK(addr) ? (254 /* RT_SCOPE_HOST */)
: IN6_IS_ADDR_LINKLOCAL(addr) ? (253 /* RT_SCOPE_LINK */)
: IN6_IS_ADDR_SITELOCAL(addr) ? (200 /* RT_SCOPE_SITE */)
: (0 /* RT_SCOPE_UNIVERSE */);
}
static inline guint8
nm_platform_ip_address_get_scope(int addr_family, gconstpointer addr)
{
if (NM_IS_IPv4(addr_family))
return nm_platform_ip4_address_get_scope(*((in_addr_t *) addr));
return nm_platform_ip6_address_get_scope(addr);
}
gboolean nm_platform_get_use_udev(NMPlatform *self);
gboolean nm_platform_get_log_with_ptr(NMPlatform *self);
gboolean nm_platform_get_cache_tc(NMPlatform *self);