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network/netdev: introduce link_get_local_address()

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It will be used in later commits.
This commit is contained in:
Yu Watanabe 2021-12-07 23:32:50 +09:00
parent 562729d744
commit 6d1b59cec4
3 changed files with 126 additions and 0 deletions
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2
src/network/meson.build
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@ -20,6 +20,8 @@ sources = files('''
netdev/macvlan.c
netdev/macvlan.h
netdev/netdev.c
netdev/netdev-util.c
netdev/netdev-util.h
netdev/netdev.h
netdev/nlmon.c
netdev/nlmon.h

97
src/network/netdev/netdev-util.c Normal file
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@ -0,0 +1,97 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "netdev-util.h"
#include "networkd-address.h"
#include "networkd-link.h"
#include "string-table.h"
static const char * const netdev_local_address_type_table[_NETDEV_LOCAL_ADDRESS_TYPE_MAX] = {
[NETDEV_LOCAL_ADDRESS_IPV4LL] = "ipv4_link_local",
[NETDEV_LOCAL_ADDRESS_IPV6LL] = "ipv6_link_local",
[NETDEV_LOCAL_ADDRESS_DHCP4] = "dhcp4",
[NETDEV_LOCAL_ADDRESS_DHCP6] = "dhcp6",
[NETDEV_LOCAL_ADDRESS_SLAAC] = "slaac",
};
DEFINE_STRING_TABLE_LOOKUP(netdev_local_address_type, NetDevLocalAddressType);
int link_get_local_address(
Link *link,
NetDevLocalAddressType type,
int family,
int *ret_family,
union in_addr_union *ret_address) {
Address *a;
assert(link);
switch (type) {
case NETDEV_LOCAL_ADDRESS_IPV4LL:
assert(IN_SET(family, AF_UNSPEC, AF_INET));
family = AF_INET;
break;
case NETDEV_LOCAL_ADDRESS_IPV6LL:
assert(IN_SET(family, AF_UNSPEC, AF_INET6));
family = AF_INET6;
break;
case NETDEV_LOCAL_ADDRESS_DHCP4:
assert(IN_SET(family, AF_UNSPEC, AF_INET));
family = AF_INET;
break;
case NETDEV_LOCAL_ADDRESS_DHCP6:
assert(IN_SET(family, AF_UNSPEC, AF_INET6));
family = AF_INET6;
break;
case NETDEV_LOCAL_ADDRESS_SLAAC:
assert(IN_SET(family, AF_UNSPEC, AF_INET6));
family = AF_INET6;
break;
default:
assert_not_reached();
}
SET_FOREACH(a, link->addresses) {
if (!address_exists(a))
continue;
if (a->family != family)
continue;
if (in_addr_is_set(a->family, &a->in_addr_peer))
continue;
switch (type) {
case NETDEV_LOCAL_ADDRESS_IPV4LL:
if (a->source != NETWORK_CONFIG_SOURCE_IPV4LL)
continue;
break;
case NETDEV_LOCAL_ADDRESS_IPV6LL:
if (!in6_addr_is_link_local(&a->in_addr.in6))
continue;
break;
case NETDEV_LOCAL_ADDRESS_DHCP4:
if (a->source != NETWORK_CONFIG_SOURCE_DHCP4)
continue;
break;
case NETDEV_LOCAL_ADDRESS_DHCP6:
if (a->source != NETWORK_CONFIG_SOURCE_DHCP6)
continue;
break;
case NETDEV_LOCAL_ADDRESS_SLAAC:
if (a->source != NETWORK_CONFIG_SOURCE_NDISC)
continue;
break;
default:
assert_not_reached();
}
if (ret_family)
*ret_family = a->family;
if (ret_address)
*ret_address = a->in_addr;
return 1;
}
return -ENXIO;
}

27
src/network/netdev/netdev-util.h Normal file
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@ -0,0 +1,27 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "in-addr-util.h"
#include "macro.h"
typedef struct Link Link;
typedef enum NetDevLocalAddressType {
NETDEV_LOCAL_ADDRESS_IPV4LL,
NETDEV_LOCAL_ADDRESS_IPV6LL,
NETDEV_LOCAL_ADDRESS_DHCP4,
NETDEV_LOCAL_ADDRESS_DHCP6,
NETDEV_LOCAL_ADDRESS_SLAAC,
_NETDEV_LOCAL_ADDRESS_TYPE_MAX,
_NETDEV_LOCAL_ADDRESS_TYPE_INVALID = -EINVAL,
} NetDevLocalAddressType;
const char *netdev_local_address_type_to_string(NetDevLocalAddressType t) _const_;
NetDevLocalAddressType netdev_local_address_type_from_string(const char *s) _pure_;
int link_get_local_address(
Link *link,
NetDevLocalAddressType type,
int family,
int *ret_family,
union in_addr_union *ret_address);