extern const struct sender udp_sender, dccp_sender, http_sender;
const struct sender * const senders[] = {
&http_sender, &dccp_sender, &udp_sender, NULL};
extern const struct sender udp_sender, dccp_sender, http_sender;
const struct sender * const senders[] = {
&http_sender, &dccp_sender, &udp_sender, NULL};