void
rr_input(int len, struct icmp6_router_renum *rr, struct in6_pktinfo *pi,
struct sockaddr_in6 *from, struct in6_addr *dst)
{
u_char ntopbuf[2][INET6_ADDRSTRLEN], ifnamebuf[IFNAMSIZ];
syslog(LOG_DEBUG,
"<%s> RR received from %s to %s on %s",
__FUNCTION__,
inet_ntop(AF_INET6, &from->sin6_addr,
ntopbuf[0], INET6_ADDRSTRLEN),
inet_ntop(AF_INET6, &dst, ntopbuf[1], INET6_ADDRSTRLEN),
if_indextoname(pi->ipi6_ifindex, ifnamebuf));
rr_rcvifindex = pi->ipi6_ifindex;
/* TODO: some consistency check. */
switch (rr->rr_code) {
case ICMP6_ROUTER_RENUMBERING_COMMAND:
rr_command_input(len, rr, &from->sin6_addr, dst);
/* TODO: send reply msg */
break;
case ICMP6_ROUTER_RENUMBERING_RESULT:
/* RESULT will be processed by rrenumd */
break;
case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
/* TODO: sequence number reset */
break;
default:
syslog(LOG_ERR, "<%s> received unknown code %d",
__FUNCTION__, rr->rr_code);
break;
}
return;
}
void
rr_input(int len, struct icmp6_router_renum *rr, struct in6_pktinfo *pi,
struct sockaddr_in6 *from, struct in6_addr *dst)
{
char ntopbuf[2][INET6_ADDRSTRLEN], ifnamebuf[IFNAMSIZ];
syslog(LOG_DEBUG,
"<%s> RR received from %s to %s on %s",
__func__,
inet_ntop(AF_INET6, &from->sin6_addr,
ntopbuf[0], INET6_ADDRSTRLEN),
inet_ntop(AF_INET6, &dst, ntopbuf[1], INET6_ADDRSTRLEN),
if_indextoname(pi->ipi6_ifindex, ifnamebuf));
/* packet validation based on Section 4.1 of RFC2894 */
if (len < sizeof(struct icmp6_router_renum)) {
syslog(LOG_NOTICE,
"<%s>: RR short message (size %d) from %s to %s on %s",
__func__, len,
inet_ntop(AF_INET6, &from->sin6_addr,
ntopbuf[0], INET6_ADDRSTRLEN),
inet_ntop(AF_INET6, &dst, ntopbuf[1], INET6_ADDRSTRLEN),
if_indextoname(pi->ipi6_ifindex, ifnamebuf));
return;
}
/*
* If the IPv6 destination address is neither an All Routers multicast
* address [AARCH] nor one of the receiving router's unicast addresses,
* the message MUST be discarded and SHOULD be logged to network
* management.
* We rely on the kernel input routine for unicast addresses, and thus
* check multicast destinations only.
*/
if (IN6_IS_ADDR_MULTICAST(&pi->ipi6_addr) &&
!IN6_ARE_ADDR_EQUAL(&in6a_site_allrouters, &pi->ipi6_addr)) {
syslog(LOG_NOTICE,
"<%s>: RR message with invalid destination (%s) "
"from %s on %s",
__func__,
inet_ntop(AF_INET6, &dst, ntopbuf[0], INET6_ADDRSTRLEN),
inet_ntop(AF_INET6, &from->sin6_addr,
ntopbuf[1], INET6_ADDRSTRLEN),
if_indextoname(pi->ipi6_ifindex, ifnamebuf));
return;
}
rr_rcvifindex = pi->ipi6_ifindex;
switch (rr->rr_code) {
case ICMP6_ROUTER_RENUMBERING_COMMAND:
rr_command_input(len, rr, &from->sin6_addr, dst);
/* TODO: send reply msg */
break;
case ICMP6_ROUTER_RENUMBERING_RESULT:
/* RESULT will be processed by rrenumd */
break;
case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
/* TODO: sequence number reset */
break;
default:
syslog(LOG_ERR, "<%s> received unknown code %d",
__func__, rr->rr_code);
break;
}
return;
}
