static int
parse_kernel_route(const struct rt_msghdr *rtm, struct kernel_route *route)
{
void *rta = (void*)rtm + sizeof(struct rt_msghdr);
struct sockaddr_in6 *sin6;
char addr[INET6_ADDRSTRLEN];
memset(route, 0, sizeof(*route));
route->metric = 0;
route->ifindex = rtm->rtm_index;
if(!(rtm->rtm_addrs & RTA_DST))
return -1;
sin6 = (struct sockaddr_in6 *)rta;
if(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)
|| IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr))
return -1;
if((rtm->rtm_flags & RTF_PROTO2) != 0)
return -1;
memcpy(&route->prefix, &sin6->sin6_addr, 16);
rta += ROUNDUP(sizeof(struct sockaddr_in6));
if(!(rtm->rtm_addrs & RTA_GATEWAY))
return -1;
sin6 = (struct sockaddr_in6 *)rta;
if(IN6_IS_ADDR_LINKLOCAL (&sin6->sin6_addr)) {
route->ifindex = IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr);
SET_IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr, 0);
}
memcpy(&route->gw, &sin6->sin6_addr, 16);
rta += ROUNDUP(sizeof(struct sockaddr_in6));
if(!(rtm->rtm_addrs & RTA_NETMASK)) {
route->plen = 0;
} else {
sin6 = (struct sockaddr_in6 *)rta;
route->plen = mask2len(&sin6->sin6_addr);
inet_ntop(AF_INET6, &sin6->sin6_addr, addr, sizeof(addr));
rta += ROUNDUP(sizeof(struct sockaddr_in6));
}
if (rtm->rtm_flags & RTF_HOST)
route->plen = 128;
if(ifindex_lo < 0) {
ifindex_lo = if_nametoindex("lo0");
if(ifindex_lo <= 0)
return -1;
}
if(route->ifindex == ifindex_lo)
return -1;
return 0;
}
static int
parse_kernel_route(const struct rt_msghdr *rtm, struct kernel_route *route)
{
struct sockaddr *sa;
char *rta = (char*)rtm + sizeof(struct rt_msghdr);
uint32_t excluded_flags = 0;
if(ifindex_lo < 0) {
ifindex_lo = if_nametoindex("lo0");
if(ifindex_lo <= 0)
return -1;
}
memset(route, 0, sizeof(*route));
route->metric = 0;
route->ifindex = rtm->rtm_index;
#if defined(RTF_IFSCOPE)
/* Filter out kernel route on OS X */
excluded_flags |= RTF_IFSCOPE;
#endif
#if defined(RTF_MULTICAST)
/* Filter out multicast route on others BSD */
excluded_flags |= RTF_MULTICAST;
#endif
/* Filter out our own route */
excluded_flags |= RTF_PROTO2;
if((rtm->rtm_flags & excluded_flags) != 0)
return -1;
/* Prefix */
if(!(rtm->rtm_addrs & RTA_DST))
return -1;
sa = (struct sockaddr *)rta;
rta += ROUNDUP(sa->sa_len);
if(sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
memcpy(route->prefix, &sin6->sin6_addr, 16);
if(IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)
|| IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr))
return -1;
} else if(sa->sa_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
#if defined(IN_LINKLOCAL)
if(IN_LINKLOCAL(ntohl(sin->sin_addr.s_addr)))
return -1;
#endif
if(IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
return -1;
v4tov6(route->prefix, (unsigned char *)&sin->sin_addr);
} else {
return -1;
}
/* Gateway */
if(!(rtm->rtm_addrs & RTA_GATEWAY))
return -1;
sa = (struct sockaddr *)rta;
rta += ROUNDUP(sa->sa_len);
if(sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
memcpy(route->gw, &sin6->sin6_addr, 16);
if(IN6_IS_ADDR_LINKLOCAL (&sin6->sin6_addr)) {
route->ifindex = IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr);
SET_IN6_LINKLOCAL_IFINDEX(sin6->sin6_addr, 0);
}
} else if(sa->sa_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
v4tov6(route->gw, (unsigned char *)&sin->sin_addr);
}
if((int)route->ifindex == ifindex_lo)
return -1;
/* Netmask */
if((rtm->rtm_addrs & RTA_NETMASK) != 0) {
sa = (struct sockaddr *)rta;
rta += ROUNDUP(sa->sa_len);
if(!v4mapped(route->prefix)) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
route->plen = mask2len((unsigned char*)&sin6->sin6_addr, 16);
} else {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
route->plen = mask2len((unsigned char*)&sin->sin_addr, 4);
}
}
if(v4mapped(route->prefix)) route->plen += 96;
if(rtm->rtm_flags & RTF_HOST) route->plen = 128;
return 0;
}
