send_recv
if (send_recv(gwy, IGMP_DVMRP, DVMRP_ASK_NEIGHBORS2, 1, &incr[0])) {
recvlen = send_recv(tdst, IGMP_MTRACE_QUERY, hops, tries, &base);
int send_recv(u_int32_t dst, int type, int code,
(recvlen = send_recv(lastout, IGMP_MTRACE_QUERY, hops, 1, &base)))
else recvlen = send_recv(tdst, IGMP_MTRACE_QUERY, hops, nqueries, &base);
recvlen = send_recv(tdst, IGMP_MTRACE_QUERY, rno, nqueries, new);
retval = send_recv(next, IGMP_DVMRP, DVMRP_ASK_NEIGHBORS2, 1, &incr[0]);