static struct odhcpd_event router_event = {.uloop = {.fd = -1}, .handle_dgram = handle_icmpv6, };
static FILE *fp_route = NULL;
-#define RA_IOV_LEN 6
#define TIME_LEFT(t1, now) ((t1) != UINT32_MAX ? (t1) - (now) : UINT32_MAX)
return lifetime;
}
+enum {
+ IOV_RA_ADV=0,
+ IOV_RA_PFXS,
+ IOV_RA_ROUTES,
+ IOV_RA_DNS,
+ IOV_RA_DNS_ADDR,
+ IOV_RA_SEARCH,
+ IOV_RA_ADV_INTERVAL,
+ IOV_RA_TOTAL,
+};
+
// Router Advert server mode
static uint64_t send_router_advert(struct interface *iface, const struct in6_addr *from)
{
time_t now = odhcpd_time();
- uint32_t mtu = iface->ra_mtu;
+ int mtu = iface->ra_mtu;
int hlim = iface->ra_hoplimit;
if (mtu == 0)
- mtu = odhcpd_get_interface_config(iface->ifname, "mtu");
+ mtu = odhcpd_get_interface_config(iface->ifname, "mtu");
if (mtu < 1280)
mtu = 1280;
struct nd_router_advert h;
struct icmpv6_opt lladdr;
struct nd_opt_mtu mtu;
- struct nd_opt_prefix_info prefix[sizeof(iface->ia_addr) / sizeof(*iface->ia_addr)];
} adv = {
.h = {{.icmp6_type = ND_ROUTER_ADVERT, .icmp6_code = 0}, 0, 0},
.lladdr = {ND_OPT_SOURCE_LINKADDR, 1, {0}},
adv.h.nd_ra_flags_reserved |= ND_RA_PREF_HIGH;
adv.h.nd_ra_reachable = htonl(iface->ra_reachabletime);
+ adv.h.nd_ra_retransmit = htonl(iface->ra_retranstime);
odhcpd_get_mac(iface, adv.lladdr.data);
// If not currently shutting down
- struct odhcpd_ipaddr addrs[RELAYD_MAX_ADDRS];
+ struct odhcpd_ipaddr *addrs = NULL;
ssize_t ipcnt = 0;
uint32_t minvalid = UINT32_MAX;
bool default_route = false;
// If not shutdown
if (iface->timer_rs.cb) {
+ size_t size = sizeof(*addrs) * iface->ia_addr_len;
+ addrs = alloca(size);
+ memcpy(addrs, iface->ia_addr, size);
+
ipcnt = iface->ia_addr_len;
- memcpy(addrs, iface->ia_addr, ipcnt * sizeof(*addrs));
// Check default route
if (iface->default_router) {
default_route = true;
}
- // Construct Prefix Information options
- size_t cnt = 0;
struct in6_addr dns_pref, *dns_addr = &dns_pref;
size_t dns_cnt = 1;
odhcpd_get_interface_dns_addr(iface, &dns_pref);
+ // Construct Prefix Information options
+ size_t pfxs_cnt = 0;
+ struct nd_opt_prefix_info *pfxs = NULL;
+
for (ssize_t i = 0; i < ipcnt; ++i) {
struct odhcpd_ipaddr *addr = &addrs[i];
uint32_t preferred = 0;
}
struct nd_opt_prefix_info *p = NULL;
- for (size_t i = 0; i < cnt; ++i) {
- if (addr->prefix == adv.prefix[i].nd_opt_pi_prefix_len &&
- !odhcpd_bmemcmp(&adv.prefix[i].nd_opt_pi_prefix,
+ for (size_t i = 0; i < pfxs_cnt; ++i) {
+ if (addr->prefix == pfxs[i].nd_opt_pi_prefix_len &&
+ !odhcpd_bmemcmp(&pfxs[i].nd_opt_pi_prefix,
&addr->addr, addr->prefix))
- p = &adv.prefix[i];
+ p = &pfxs[i];
}
if (!p) {
- if (cnt >= ARRAY_SIZE(adv.prefix))
- break;
+ struct nd_opt_prefix_info *tmp;
+
+ tmp = realloc(pfxs, sizeof(*pfxs) * (pfxs_cnt + 1));
+ if (!tmp) {
+ syslog(LOG_ERR, "Realloc failed for RA prefix option on interface %s", iface->ifname);
+ continue;
+ }
- p = &adv.prefix[cnt++];
+ pfxs = tmp;
+ p = &pfxs[pfxs_cnt++];
+ memset(p, 0, sizeof(*p));
}
if (addr->preferred > (uint32_t)now) {
uint32_t lifetime;
} dns = {ND_OPT_RECURSIVE_DNS, (1 + (2 * dns_cnt)), 0, 0, 0};
-
-
// DNS Search options
uint8_t search_buf[256], *search_domain = iface->search;
size_t search_len = iface->search_len, search_padded = 0;
uint8_t flags;
uint32_t lifetime;
uint32_t addr[4];
- } routes[RELAYD_MAX_PREFIXES];
+ } *tmp, *routes = NULL;
for (ssize_t i = 0; i < ipcnt; ++i) {
struct odhcpd_ipaddr *addr = &addrs[i];
addr->addr.s6_addr32[1] = 0;
}
+ tmp = realloc(routes, sizeof(*routes) * (routes_cnt + 1));
+ if (!tmp) {
+ syslog(LOG_ERR, "Realloc failed for RA route option on interface %s", iface->ifname);
+ continue;
+ }
+
+ routes = tmp;
+
+ memset(&routes[routes_cnt], 0, sizeof(*routes));
routes[routes_cnt].type = ND_OPT_ROUTE_INFO;
routes[routes_cnt].len = sizeof(*routes) / 8;
routes[routes_cnt].prefix = addr->dprefix;
.data = {0, 0, (maxival*1000) >> 24, (maxival*1000) >> 16, (maxival*1000) >> 8, maxival*1000}
};
- struct iovec iov[RA_IOV_LEN] = {
- {&adv, (uint8_t*)&adv.prefix[cnt] - (uint8_t*)&adv},
- {&routes, routes_cnt * sizeof(*routes)},
- {&dns, (dns_cnt) ? sizeof(dns) : 0},
- {dns_addr, dns_cnt * sizeof(*dns_addr)},
- {search, search->len * 8},
- {&adv_interval, adv_interval.len * 8}};
+ struct iovec iov[IOV_RA_TOTAL] = {
+ [IOV_RA_ADV] = {&adv, sizeof(adv)},
+ [IOV_RA_PFXS] = {pfxs, pfxs_cnt * sizeof(*pfxs)},
+ [IOV_RA_ROUTES] = {routes, routes_cnt * sizeof(*routes)},
+ [IOV_RA_DNS] = {&dns, (dns_cnt) ? sizeof(dns) : 0},
+ [IOV_RA_DNS_ADDR] = {dns_addr, dns_cnt * sizeof(*dns_addr)},
+ [IOV_RA_SEARCH] = {search, search->len * 8},
+ [IOV_RA_ADV_INTERVAL] = {&adv_interval, adv_interval.len * 8}};
struct sockaddr_in6 dest = {AF_INET6, 0, 0, ALL_IPV6_NODES, 0};
if (from && !IN6_IS_ADDR_UNSPECIFIED(from))
odhcpd_send(router_event.uloop.fd,
&dest, iov, ARRAY_SIZE(iov), iface);
+ free(pfxs);
+ free(routes);
+
return msecs;
}
projects / project / odhcpd.git / blobdiff