#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
+#include <sys/ioctl.h>
#include <netinet/in.h>
#include <netinet/icmp6.h>
static void ra_send_rs(int signal __attribute__((unused)))
{
- const struct icmp6_hdr rs = {ND_ROUTER_SOLICIT, 0, 0, {{0}}};
+ struct {
+ struct icmp6_hdr hdr;
+ struct icmpv6_opt lladdr;
+ } rs = {
+ .hdr = {ND_ROUTER_SOLICIT, 0, 0, {{0}}},
+ .lladdr = {ND_OPT_SOURCE_LINKADDR, 1, {0}},
+ };
const struct sockaddr_in6 dest = {AF_INET6, 0, 0, ALL_IPV6_ROUTERS, if_index};
- sendto(sock, &rs, sizeof(rs), MSG_DONTWAIT, (struct sockaddr*)&dest, sizeof(dest));
+ size_t len = sizeof(rs);
+
+ struct ifreq ifr;
+ memset(&ifr, 0, sizeof(ifr));
+ strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
+ if (!ioctl(sock, SIOCGIFHWADDR, &ifr)
+ && memcmp(rs.lladdr.data, ifr.ifr_hwaddr.sa_data, 6))
+ memcpy(rs.lladdr.data, ifr.ifr_hwaddr.sa_data, 6);
+ else
+ len = sizeof(struct icmp6_hdr);
+
+ sendto(sock, &rs, len, MSG_DONTWAIT, (struct sockaddr*)&dest, sizeof(dest));
if (++rs_attempt <= 3)
alarm(4);
update_proc("conf", "hop_limit", adv->nd_ra_curhoplimit);
// Parse ND parameters
- if (ntohl(adv->nd_ra_reachable) <= 3600000)
- update_proc("neigh", "base_reachable_time_ms", ntohl(adv->nd_ra_reachable));
+ uint32_t reachable = ntohl(adv->nd_ra_reachable);
+ if (reachable > 0 && reachable <= 3600000)
+ update_proc("neigh", "base_reachable_time_ms", reachable);
- if (ntohl(adv->nd_ra_retransmit) <= 60000)
- update_proc("neigh", "retrans_time_ms", ntohl(adv->nd_ra_retransmit));
+ uint32_t retransmit = ntohl(adv->nd_ra_retransmit);
+ if (retransmit > 0 && retransmit <= 60000)
+ update_proc("neigh", "retrans_time_ms", retransmit);
// Evaluate options
|| entry.valid < entry.preferred)
continue;
+ if (pinfo->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
+ changed |= odhcp6c_update_entry_safe(STATE_RA_ROUTE, &entry, 7200);
+
if (!(pinfo->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO) ||
- pinfo->nd_opt_pi_prefix_len != 64) {
- if (pinfo->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
- changed |= odhcp6c_update_entry_safe(STATE_RA_ROUTE, &entry, 7200);
+ pinfo->nd_opt_pi_prefix_len != 64)
continue;
- }
entry.target.s6_addr32[2] = lladdr.s6_addr32[2];
entry.target.s6_addr32[3] = lladdr.s6_addr32[3];
- if (!(pinfo->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK))
- entry.length = 128;
changed |= odhcp6c_update_entry_safe(STATE_RA_PREFIX, &entry, 7200);
} else if (opt->type == ND_OPT_RECURSIVE_DNS && opt->len > 2) {
entry.router = from.sin6_addr;