static int send_ra(int sock, struct Interface *iface, struct in6_addr const *dest)
{
if (!iface->AdvSendAdvert) {
dlog(LOG_DEBUG, 2, "AdvSendAdvert is off for %s", iface->props.name);
return 0;
}
if (dest == NULL) {
static uint8_t const all_hosts_addr[] = { 0xff, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };
dest = (struct in6_addr const *)all_hosts_addr;
clock_gettime(CLOCK_MONOTONIC, &iface->times.last_multicast);
}
update_iface_times(iface);
char address_text[INET6_ADDRSTRLEN] = { "" };
inet_ntop(AF_INET6, dest, address_text, INET6_ADDRSTRLEN);
dlog(LOG_DEBUG, 5, "sending RA to %s on %s", address_text, iface->props.name);
struct safe_buffer safe_buffer = SAFE_BUFFER_INIT;
build_ra(&safe_buffer, iface);
int err = really_send(sock, dest, &iface->props, &safe_buffer);
safe_buffer_free(&safe_buffer);
if (err < 0) {
if (!iface->IgnoreIfMissing || !(errno == EINVAL || errno == ENODEV))
flog(LOG_WARNING, "sendmsg: %s", strerror(errno));
else
dlog(LOG_DEBUG, 3, "sendmsg: %s", strerror(errno));
return -1;
}
return 0;
}
static void add_pvd(struct safe_buffer * sb, struct AdvPvd const *pvd, int cease_adv)
{
while (pvd) {
/* create a temporary buffer to write the encapsulated options to
until we calculate the total length of the outer PVD_CO option */
size_t total_len = 0;
struct safe_buffer pvd_sb = SAFE_BUFFER_INIT;
struct AdvPrefix *prefix = pvd->AdvPrefixList;
while (prefix) {
char pfx_str[INET6_ADDRSTRLEN];
addrtostr(&prefix->Prefix, pfx_str, sizeof(pfx_str));
prefix = prefix->next;
}
struct nd_opt_pvd pvdinfo;
memset(&pvdinfo, 0, sizeof(pvdinfo));
/* create PVD_CO container option */
pvdinfo.nd_opt_pvd_container_type = ND_OPT_PVD_CONTAINER;
/* initial length of PVD_CO option without encapsulated options */
pvdinfo.nd_opt_pvd_container_len = 1;
total_len += pvdinfo.nd_opt_pvd_container_len;
pvdinfo.nd_opt_pvd_container_s = 0;
pvdinfo.nd_opt_pvd_container_nametype = 0;
/* add PVD_ID option */
pvdinfo.nd_opt_pvd_id_type = ND_OPT_PVD_ID;
pvdinfo.nd_opt_pvd_id_len = 5;
total_len += pvdinfo.nd_opt_pvd_id_len;
pvdinfo.nd_opt_pvd_id_idtype = 4;
pvdinfo.nd_opt_pvd_id_idlen = 36;
memcpy(&pvdinfo.nd_opt_pvd_id_pvdid, pvd->pvdid, sizeof(pvdinfo.nd_opt_pvd_id_pvdid));;
/* add encapsulated ND options if specified */
if (pvd->AdvPrefixList) {
total_len += add_prefix(&pvd_sb, pvd->AdvPrefixList, cease_adv);
}
if (pvd->AdvRouteList) {
total_len += add_route(&pvd_sb, pvd->AdvRouteList, cease_adv);
}
if (pvd->AdvRDNSSList) {
total_len += add_rdnss(&pvd_sb, pvd->AdvRDNSSList, cease_adv);
}
if (pvd->AdvDNSSLList) {
total_len += add_dnssl(&pvd_sb, pvd->AdvDNSSLList, cease_adv);
}
/*
if (iface->AdvLinkMTU != 0) {
add_mtu(sb, iface->AdvLinkMTU);
}
if (iface->AdvSourceLLAddress && iface->sllao.if_hwaddr_len > 0) {
add_sllao(sb, &iface->sllao);
}
if (iface->mipv6.AdvIntervalOpt) {
add_mipv6_rtr_adv_interval(sb, iface->MaxRtrAdvInterval);
}
if (iface->mipv6.AdvHomeAgentInfo
&& (iface->mipv6.AdvMobRtrSupportFlag || iface->mipv6.HomeAgentPreference != 0
|| iface->mipv6.HomeAgentLifetime != iface->ra_header_info.AdvDefaultLifetime)) {
add_mipv6_home_agent_info(sb, &iface->mipv6);
}
*/
if (pvd->AdvLowpanCoList) {
total_len += add_lowpanco(&pvd_sb, pvd->AdvLowpanCoList);
}
if (pvd->AdvAbroList) {
total_len += add_abro(&pvd_sb, pvd->AdvAbroList);
}
/* write out PVD_CO container option + PVD_ID option */
pvdinfo.nd_opt_pvd_container_len = total_len;
safe_buffer_append(sb, &pvdinfo, sizeof(pvdinfo));
/* write out encapsulated ND options */
safe_buffer_append(sb, pvd_sb.buffer, pvd_sb.used);
/* destroy a temporary buffer */
safe_buffer_free(&pvd_sb);
pvd = pvd->next;
}
}
