/* ARGSUSED4 */
int
if_route(const struct interface *iface, const struct in_addr *dest,
const struct in_addr *net, const struct in_addr *gate,
int metric, int action)
{
int error;
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
struct sockaddr_dl sdl;
struct sockaddr_storage ss;
} su;
struct rtm
{
struct rt_msghdr hdr;
char buffer[sizeof(su) * 4];
} rtm;
char *bp = rtm.buffer, *p;
size_t l;
struct mbuf *m;
#define ADDSU(_su) { \
l = RT_ROUNDUP(_su.sa.sa_len); \
memcpy(bp, &(_su), l); \
bp += l; \
}
#define ADDADDR(_a) { \
memset (&su, 0, sizeof(su)); \
su.sin.sin_family = AF_INET; \
su.sin.sin_len = sizeof(su.sin); \
memcpy (&su.sin.sin_addr, _a, sizeof(su.sin.sin_addr)); \
ADDSU(su); \
}
memset(&rtm, 0, sizeof(rtm));
rtm.hdr.rtm_version = RTM_VERSION;
rtm.hdr.rtm_seq = 1;
if (action == 0)
rtm.hdr.rtm_type = RTM_CHANGE;
else if (action > 0)
rtm.hdr.rtm_type = RTM_ADD;
else {
rtm.hdr.rtm_type = RTM_DELETE;
/* shortcircuit a bit for now */
return 0;
}
rtm.hdr.rtm_flags = RTF_UP;
/* None interface subnet routes are static. */
if (gate->s_addr != INADDR_ANY ||
net->s_addr != iface->net.s_addr ||
dest->s_addr != (iface->addr.s_addr & iface->net.s_addr))
rtm.hdr.rtm_flags |= RTF_STATIC;
rtm.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
if (dest->s_addr == gate->s_addr && net->s_addr == INADDR_BROADCAST)
rtm.hdr.rtm_flags |= RTF_HOST;
else {
rtm.hdr.rtm_addrs |= RTA_NETMASK;
if (rtm.hdr.rtm_flags & RTF_STATIC)
rtm.hdr.rtm_flags |= RTF_GATEWAY;
if (action >= 0)
rtm.hdr.rtm_addrs |= RTA_IFA;
}
ADDADDR(dest);
if (rtm.hdr.rtm_flags & RTF_HOST ||
!(rtm.hdr.rtm_flags & RTF_STATIC))
{
/* Make us a link layer socket for the host gateway */
memset(&su, 0, sizeof(su));
memcpy(&su.sdl, iface->ifp->if_sadl, sizeof(su.sdl));
ADDSU(su);
} else {
ADDADDR(gate);
}
if (rtm.hdr.rtm_addrs & RTA_NETMASK) {
/* Ensure that netmask is set correctly */
memset(&su, 0, sizeof(su));
su.sin.sin_family = AF_INET;
su.sin.sin_len = sizeof(su.sin);
memcpy(&su.sin.sin_addr, &net->s_addr, sizeof(su.sin.sin_addr));
p = su.sa.sa_len + (char *)&su;
for (su.sa.sa_len = 0; p > (char *)&su;)
if (*--p != 0) {
su.sa.sa_len = 1 + p - (char *)&su;
break;
}
ADDSU(su);
}
if (rtm.hdr.rtm_addrs & RTA_IFA)
ADDADDR(&iface->addr);
m = m_gethdr(M_WAIT, MT_DATA);
m->m_pkthdr.len = rtm.hdr.rtm_msglen = l = bp - (char *)&rtm;
m->m_len = 0;
m_copyback(m, 0, l, &rtm);
/* XXX: no check */
solock(routeso);
#if __NetBSD_Prereq__(7,99,26)
error = routeso->so_proto->pr_usrreqs->pr_send(routeso,
m, NULL, NULL, curlwp);
#else
error = routeso->so_proto->pr_output(m, routeso);
#endif
sounlock(routeso);
return error;
}
/* ARGSUSED4 */
int
if_route(const struct interface *iface, const struct in_addr *dest,
const struct in_addr *net, const struct in_addr *gate,
_unused int metric, int action)
{
union sockunion {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef INET6
struct sockaddr_in6 sin6;
#endif
struct sockaddr_dl sdl;
struct sockaddr_storage ss;
} su;
struct rtm
{
struct rt_msghdr hdr;
char buffer[sizeof(su) * 4];
} rtm;
char *bp = rtm.buffer, *p;
size_t l;
int retval = 0;
#define ADDSU(_su) { \
l = ROUNDUP(_su.sa.sa_len); \
memcpy(bp, &(_su), l); \
bp += l; \
}
#define ADDADDR(_a) { \
memset (&su, 0, sizeof(su)); \
su.sin.sin_family = AF_INET; \
su.sin.sin_len = sizeof(su.sin); \
memcpy (&su.sin.sin_addr, _a, sizeof(su.sin.sin_addr)); \
ADDSU(su); \
}
memset(&rtm, 0, sizeof(rtm));
rtm.hdr.rtm_version = RTM_VERSION;
rtm.hdr.rtm_seq = 1;
if (action == 0)
rtm.hdr.rtm_type = RTM_CHANGE;
else if (action > 0)
rtm.hdr.rtm_type = RTM_ADD;
else
rtm.hdr.rtm_type = RTM_DELETE;
rtm.hdr.rtm_flags = RTF_UP;
/* None interface subnet routes are static. */
if (gate->s_addr != INADDR_ANY ||
net->s_addr != iface->net.s_addr ||
dest->s_addr != (iface->addr.s_addr & iface->net.s_addr))
rtm.hdr.rtm_flags |= RTF_STATIC;
rtm.hdr.rtm_addrs = RTA_DST | RTA_GATEWAY;
if (dest->s_addr == gate->s_addr && net->s_addr == INADDR_BROADCAST)
rtm.hdr.rtm_flags |= RTF_HOST;
else {
rtm.hdr.rtm_addrs |= RTA_NETMASK;
if (rtm.hdr.rtm_flags & RTF_STATIC)
rtm.hdr.rtm_flags |= RTF_GATEWAY;
if (action >= 0)
rtm.hdr.rtm_addrs |= RTA_IFA;
}
ADDADDR(dest);
if (rtm.hdr.rtm_flags & RTF_HOST ||
!(rtm.hdr.rtm_flags & RTF_STATIC))
{
/* Make us a link layer socket for the host gateway */
memset(&su, 0, sizeof(su));
su.sdl.sdl_len = sizeof(struct sockaddr_dl);
link_addr(iface->name, &su.sdl);
ADDSU(su);
} else
ADDADDR(gate);
if (rtm.hdr.rtm_addrs & RTA_NETMASK) {
/* Ensure that netmask is set correctly */
memset(&su, 0, sizeof(su));
su.sin.sin_family = AF_INET;
su.sin.sin_len = sizeof(su.sin);
memcpy(&su.sin.sin_addr, &net->s_addr, sizeof(su.sin.sin_addr));
p = su.sa.sa_len + (char *)&su;
for (su.sa.sa_len = 0; p > (char *)&su;)
if (*--p != 0) {
su.sa.sa_len = 1 + p - (char *)&su;
break;
}
ADDSU(su);
}
if (rtm.hdr.rtm_addrs & RTA_IFA)
ADDADDR(&iface->addr);
rtm.hdr.rtm_msglen = l = bp - (char *)&rtm;
if (write(r_fd, &rtm, l) == -1)
retval = -1;
return retval;
}