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sd-netlink: introduce sd_netlink_message_read_u64()

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This commit is contained in:
Yu Watanabe
2024-08-20 06:56:53 +09:00
parent 727235006a
commit 7275739728
2 changed files with 29 additions and 0 deletions
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28
src/libsystemd/sd-netlink/netlink-message.c
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@@ -928,6 +928,34 @@ int sd_netlink_message_read_u32(sd_netlink_message *m, uint16_t attr_type, uint3
return 0;
}
int sd_netlink_message_read_u64(sd_netlink_message *m, uint16_t attr_type, uint64_t *ret) {
void *attr_data;
bool net_byteorder;
int r;
assert_return(m, -EINVAL);
r = message_attribute_has_type(m, NULL, attr_type, NETLINK_TYPE_U64);
if (r < 0)
return r;
r = netlink_message_read_internal(m, attr_type, &attr_data, &net_byteorder);
if (r < 0)
return r;
if ((size_t) r < sizeof(uint64_t))
return -EIO;
if (ret) {
if (net_byteorder)
*ret = be64toh(*(uint64_t *) attr_data);
else
*ret = *(uint64_t *) attr_data;
}
return 0;
}
int sd_netlink_message_read_ether_addr(sd_netlink_message *m, uint16_t attr_type, struct ether_addr *data) {
void *attr_data;
int r;

1
src/systemd/sd-netlink.h
View File

@@ -112,6 +112,7 @@ int sd_netlink_message_read_strv(sd_netlink_message *m, uint16_t container_type,
int sd_netlink_message_read_u8(sd_netlink_message *m, uint16_t attr_type, uint8_t *data);
int sd_netlink_message_read_u16(sd_netlink_message *m, uint16_t attr_type, uint16_t *data);
int sd_netlink_message_read_u32(sd_netlink_message *m, uint16_t attr_type, uint32_t *data);
int sd_netlink_message_read_u64(sd_netlink_message *m, uint16_t attr_type, uint64_t *ret);
int sd_netlink_message_read_ether_addr(sd_netlink_message *m, uint16_t attr_type, struct ether_addr *data);
int sd_netlink_message_read_cache_info(sd_netlink_message *m, uint16_t attr_type, struct ifa_cacheinfo *info);
int sd_netlink_message_read_in_addr(sd_netlink_message *m, uint16_t attr_type, struct in_addr *data);