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sd-netlink: introduce netlink_message_read_in_addr_union()

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This commit is contained in:
Yu Watanabe 2020-09-29 22:34:37 +09:00
parent 47a277f18b
commit f29b6b371e
2 changed files with 21 additions and 18 deletions
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37
src/libsystemd/sd-netlink/netlink-message.c
View File

@ -862,11 +862,12 @@ int sd_netlink_message_read_cache_info(sd_netlink_message *m, unsigned short typ
return 0;
}
int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type, struct in_addr *data) {
int r;
int netlink_message_read_in_addr_union(sd_netlink_message *m, unsigned short type, int family, union in_addr_union *data) {
void *attr_data;
int r;
assert_return(m, -EINVAL);
assert_return(IN_SET(family, AF_INET, AF_INET6), -EINVAL);
r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR);
if (r < 0)
@ -875,35 +876,35 @@ int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type,
r = netlink_message_read_internal(m, type, &attr_data, NULL);
if (r < 0)
return r;
else if ((size_t) r < sizeof(struct in_addr))
else if ((size_t) r < FAMILY_ADDRESS_SIZE(family))
return -EIO;
if (data)
memcpy(data, attr_data, sizeof(struct in_addr));
memcpy(data, attr_data, FAMILY_ADDRESS_SIZE(family));
return 0;
}
int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type, struct in6_addr *data) {
int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type, struct in_addr *data) {
union in_addr_union u;
int r;
void *attr_data;
assert_return(m, -EINVAL);
r = netlink_message_read_in_addr_union(m, type, AF_INET, &u);
if (r >= 0 && data)
*data = u.in;
r = message_attribute_has_type(m, NULL, type, NETLINK_TYPE_IN_ADDR);
if (r < 0)
return r;
return r;
}
r = netlink_message_read_internal(m, type, &attr_data, NULL);
if (r < 0)
return r;
else if ((size_t) r < sizeof(struct in6_addr))
return -EIO;
int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type, struct in6_addr *data) {
union in_addr_union u;
int r;
if (data)
memcpy(data, attr_data, sizeof(struct in6_addr));
r = netlink_message_read_in_addr_union(m, type, AF_INET6, &u);
if (r >= 0 && data)
*data = u.in6;
return 0;
return r;
}
int sd_netlink_message_read_strv(sd_netlink_message *m, unsigned short container_type, unsigned short type_id, char ***ret) {

2
src/libsystemd/sd-netlink/netlink-util.h
View File

@ -90,5 +90,7 @@ int rtnl_log_create_error(int r);
int netlink_message_append_in_addr_union(sd_netlink_message *m, unsigned short type, int family, const union in_addr_union *data);
int netlink_message_append_sockaddr_union(sd_netlink_message *m, unsigned short type, const union sockaddr_union *data);
int netlink_message_read_in_addr_union(sd_netlink_message *m, unsigned short type, int family, union in_addr_union *data);
void rtattr_append_attribute_internal(struct rtattr *rta, unsigned short type, const void *data, size_t data_length);
int rtattr_append_attribute(struct rtattr **rta, unsigned short type, const void *data, size_t data_length);