int sock = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
if (sock < 0) {
syslog(LOG_ERR, "Failed to create DHCPv6 server socket: %s",
int sock = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
if (sock < 0) {
syslog(LOG_ERR, "Failed to create DHCPv6 server socket: %s",