sg_sin
STRN_CPY(host->addr, inet_ntoa(sin->sg_sin.sin_addr), sizeof(host->addr));
inet_ntoa(sin->sg_sin.sin_addr),
memcpy(&sg->sg_sin, &v4_addr, sizeof(v4_addr));
&(sag)->sg_sin.sin_port))
(char *)&(sag)->sg_sin.sin_addr))
(sag)->sg_sin.sin_addr.s_addr == 0)
#define SGPORT(sag) ((sag)->sg_sin.sin_port)
#define SGADDRP(sag) ((char *)&(sag)->sg_sin.sin_addr)
#define SG_IS_UNSPECIFIED(sag) ((sag)->sg_sin.sin_addr.s_addr == 0)