MIN_IP_HEADER_LEN
ip->ip_len = htons(MIN_IP_HEADER_LEN + IGMP_MINLEN + datalen);
igmp = (struct igmp *)(send_buf + MIN_IP_HEADER_LEN);
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN;
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
p = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
q = (u_char *) (send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);
query = (struct tr_query *)(send_buf + MIN_IP_HEADER_LEN + IGMP_MINLEN);