#include <netlink/socket.h>
#include <netlink/attr.h>
-#include "router.h"
#include "dhcpv6.h"
-#include "ndp.h"
+#include "odhcpd.h"
struct event_socket {
struct odhcpd_event ev;
struct nl_sock *sock;
+ int sock_bufsize;
};
static void handle_solicit(void *addr, void *data, size_t len,
struct interface *iface, void *dest);
static void handle_rtnl_event(struct odhcpd_event *ev);
static int cb_rtnl_valid(struct nl_msg *msg, void *arg);
-static void catch_rtnetlink(int error);
+static void catch_rtnl_err(struct odhcpd_event *e, int error);
+static int addr6_dump_rqs = 0;
static int ping_socket = -1;
static struct event_socket rtnl_event = {
.ev = {
.uloop = {.fd = - 1, },
.handle_dgram = NULL,
- .handle_error = catch_rtnetlink,
+ .handle_error = catch_rtnl_err,
.recv_msgs = handle_rtnl_event,
},
.sock = NULL,
+ .sock_bufsize = 133120,
};
// Filter ICMPv6 messages of type neighbor soliciation
// Initialize NDP-proxy
int init_ndp(void)
{
- int val = 256 * 1024;
+ int val = 2;
rtnl_event.sock = odhcpd_create_nl_socket(NETLINK_ROUTE);
if (!rtnl_event.sock)
rtnl_event.ev.uloop.fd = nl_socket_get_fd(rtnl_event.sock);
- if (nl_socket_set_buffer_size(rtnl_event.sock, val, 0))
+ if (nl_socket_set_buffer_size(rtnl_event.sock, rtnl_event.sock_bufsize, 0))
goto err;
nl_socket_disable_seq_check(rtnl_event.sock);
return -1;
}
- val = 2;
setsockopt(ping_socket, IPPROTO_RAW, IPV6_CHECKSUM, &val, sizeof(val));
// This is required by RFC 4861
nlmsg_free(msg);
}
-static void dump_addr_table(void)
+static void dump_addr6_table(void)
{
struct nl_msg *msg;
struct ifaddrmsg ifa = {
nlmsg_free(msg);
}
+void ndp_handle_addr6_dump(void)
+{
+ if (!addr6_dump_rqs)
+ return;
+
+ dump_addr6_table();
+ addr6_dump_rqs = 0;
+}
+
+inline void ndp_rqs_addr6_dump(void)
+{
+ addr6_dump_rqs++;
+}
+
int setup_ndp_interface(struct interface *iface, bool enable)
{
+ int ret = 0, procfd;
+ bool dump_neigh = false;
char procbuf[64];
+
snprintf(procbuf, sizeof(procbuf), "/proc/sys/net/ipv6/conf/%s/proxy_ndp", iface->ifname);
- int procfd = open(procbuf, O_WRONLY);
- bool dump_neigh = false;
+ procfd = open(procbuf, O_WRONLY);
+
+ if (procfd < 0) {
+ ret = -1;
+ goto out;
+ }
if (iface->ndp_event.uloop.fd > 0) {
uloop_fd_delete(&iface->ndp_event.uloop);
dump_neigh = true;
}
- if (enable && (iface->ra == RELAYD_SERVER ||
- iface->dhcpv6 == RELAYD_SERVER || iface->ndp == RELAYD_RELAY))
- dump_addr_table();
-
if (enable && iface->ndp == RELAYD_RELAY) {
if (write(procfd, "1\n", 2) < 0) {}
- close(procfd);
int sock = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, htons(ETH_P_IPV6));
if (sock < 0) {
syslog(LOG_ERR, "Unable to open packet socket: %s",
strerror(errno));
- return -1;
+ ret = -1;
+ goto out;
}
#ifdef PACKET_RECV_TYPE
if (setsockopt(sock, SOL_SOCKET, SO_ATTACH_FILTER,
&bpf_prog, sizeof(bpf_prog))) {
syslog(LOG_ERR, "Failed to set BPF: %s", strerror(errno));
- return -1;
+ ret = -1;
+ goto out;
}
struct sockaddr_ll ll = {
dump_neigh_table(false);
else
dump_neigh = false;
- } else
- close(procfd);
+
+ ndp_rqs_addr6_dump();
+ }
if (dump_neigh)
dump_neigh_table(true);
- return 0;
+out:
+ if (procfd >= 0)
+ close(procfd);
+
+ return ret;
}
struct sockaddr_in6 dest = { .sin6_family = AF_INET6, .sin6_addr = *addr, .sin6_scope_id = iface->ifindex, };
struct icmp6_hdr echo = { .icmp6_type = ICMP6_ECHO_REQUEST };
struct iovec iov = { .iov_base = &echo, .iov_len = sizeof(echo) };
+ char ipbuf[INET6_ADDRSTRLEN];
+
+ inet_ntop(AF_INET6, addr, ipbuf, sizeof(ipbuf));
+ syslog(LOG_NOTICE, "Pinging for %s%%%s", ipbuf, iface->ifname);
odhcpd_setup_route(addr, 128, iface, NULL, 128, true);
odhcpd_send(ping_socket, &dest, &iov, 1, iface);
odhcpd_setup_route(addr, 128, iface, NULL, 128, false);
}
-
// Handle solicitations
static void handle_solicit(void *addr, void *data, size_t len,
struct interface *iface, _unused void *dest)
struct ip6_hdr *ip6 = data;
struct nd_neighbor_solicit *req = (struct nd_neighbor_solicit*)&ip6[1];
struct sockaddr_ll *ll = addr;
+ char ipbuf[INET6_ADDRSTRLEN];
+ uint8_t mac[6];
// Solicitation is for duplicate address detection
bool ns_is_dad = IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src);
IN6_IS_ADDR_MULTICAST(&req->nd_ns_target))
return; // Invalid target
- char ipbuf[INET6_ADDRSTRLEN];
inet_ntop(AF_INET6, &req->nd_ns_target, ipbuf, sizeof(ipbuf));
- syslog(LOG_DEBUG, "Got a NS for %s", ipbuf);
+ syslog(LOG_DEBUG, "Got a NS for %s%%%s", ipbuf, iface->ifname);
- uint8_t mac[6];
odhcpd_get_mac(iface, mac);
if (!memcmp(ll->sll_addr, mac, sizeof(mac)))
return; // Looped back
// Use rtnetlink to modify kernel routes
static void setup_route(struct in6_addr *addr, struct interface *iface, bool add)
{
- char namebuf[INET6_ADDRSTRLEN];
- inet_ntop(AF_INET6, addr, namebuf, sizeof(namebuf));
- syslog(LOG_NOTICE, "%s about %s on %s",
- (add) ? "Learned" : "Forgot", namebuf, iface->ifname);
+ char ipbuf[INET6_ADDRSTRLEN];
+
+ inet_ntop(AF_INET6, addr, ipbuf, sizeof(ipbuf));
+ syslog(LOG_NOTICE, "%s about %s%%%s",
+ (add) ? "Learned" : "Forgot", ipbuf, iface->ifname);
if (iface->learn_routes)
odhcpd_setup_route(addr, 128, iface, NULL, 1024, add);
static int prefixcmp(const void *va, const void *vb)
{
const struct odhcpd_ipaddr *a = va, *b = vb;
- uint32_t a_pref = ((a->addr.s6_addr[0] & 0xfe) != 0xfc) ? a->preferred : 1;
- uint32_t b_pref = ((b->addr.s6_addr[0] & 0xfe) != 0xfc) ? b->preferred : 1;
+ uint32_t a_pref = IN6_IS_ADDR_ULA(&a->addr) ? 1 : a->preferred;
+ uint32_t b_pref = IN6_IS_ADDR_ULA(&b->addr) ? 1 : b->preferred;
return (a_pref < b_pref) ? 1 : (a_pref > b_pref) ? -1 : 0;
}
// Check address update
static void check_addr_updates(struct interface *iface)
{
- struct odhcpd_ipaddr addr[RELAYD_MAX_ADDRS] = {{IN6ADDR_ANY_INIT, 0, 0, 0, 0}};
+ struct odhcpd_ipaddr *addr = NULL;
time_t now = odhcpd_time();
- ssize_t len = odhcpd_get_interface_addresses(iface->ifindex, addr, ARRAY_SIZE(addr));
+ ssize_t len = odhcpd_get_interface_addresses(iface->ifindex, &addr);
if (len < 0)
return;
qsort(addr, len, sizeof(*addr), prefixcmp);
for (int i = 0; i < len; ++i) {
- addr[i].addr.s6_addr32[3] = 0;
-
if (addr[i].preferred < UINT32_MAX - now)
addr[i].preferred += now;
if (change)
dhcpv6_ia_preupdate(iface);
- memcpy(iface->ia_addr, addr, len * sizeof(*addr));
+ free(iface->ia_addr);
+ iface->ia_addr = addr;
iface->ia_addr_len = len;
if (change)
}
}
-void setup_addr_for_relaying(struct in6_addr *addr, struct interface *iface, bool add)
+static void setup_addr_for_relaying(struct in6_addr *addr, struct interface *iface, bool add)
{
struct interface *c;
+ char ipbuf[INET6_ADDRSTRLEN];
+
+ inet_ntop(AF_INET6, addr, ipbuf, sizeof(ipbuf));
list_for_each_entry(c, &interfaces, head) {
if (iface == c || (c->ndp != RELAYD_RELAY && !add))
continue;
- odhcpd_setup_proxy_neigh(addr, c, c->ndp == RELAYD_RELAY ? add : false);
- }
-}
+ bool neigh_add = (c->ndp == RELAYD_RELAY ? add : false);
-void setup_ping6(struct in6_addr *addr, struct interface *iface)
-{
- struct interface *c;
-
- list_for_each_entry(c, &interfaces, head) {
- if (iface == c || c->ndp != RELAYD_RELAY ||
- c->external == true)
- continue;
-
- ping6(addr, c);
+ if (odhcpd_setup_proxy_neigh(addr, c, neigh_add))
+ syslog(LOG_DEBUG, "Failed to %s proxy neighbour entry %s%%%s",
+ neigh_add ? "add" : "delete", ipbuf, c->ifname);
+ else
+ syslog(LOG_DEBUG, "%s proxy neighbour entry %s%%%s",
+ neigh_add ? "Added" : "Deleted", ipbuf, c->ifname);
}
}
-static struct in6_addr last_solicited;
-
static void handle_rtnl_event(struct odhcpd_event *e)
{
struct event_socket *ev_sock = container_of(e, struct event_socket, ev);
struct in6_addr *addr = NULL;
struct interface *iface = NULL;
bool add = false;
+ char ipbuf[INET6_ADDRSTRLEN];
switch (hdr->nlmsg_type) {
case RTM_NEWROUTE:
case RTM_NEWADDR:
add = true;
+ /* fall through */
case RTM_DELADDR: {
struct ifaddrmsg *ifa = nlmsg_data(hdr);
struct nlattr *nla[__IFA_MAX];
IN6_IS_ADDR_MULTICAST(addr))
return NL_SKIP;
+ inet_ntop(AF_INET6, addr, ipbuf, sizeof(ipbuf));
+ syslog(LOG_DEBUG, "Netlink %s %s%%%s", true ? "newaddr" : "deladdr",
+ ipbuf, iface->ifname);
+
check_addr_updates(iface);
if (iface->ndp != RELAYD_RELAY)
case RTM_NEWNEIGH:
add = true;
+ /* fall through */
case RTM_DELNEIGH: {
struct ndmsg *ndm = nlmsg_data(hdr);
struct nlattr *nla[__NDA_MAX];
IN6_IS_ADDR_MULTICAST(addr))
return NL_SKIP;
+ inet_ntop(AF_INET6, addr, ipbuf, sizeof(ipbuf));
+ syslog(LOG_DEBUG, "Netlink %s %s%%%s", true ? "newneigh" : "delneigh",
+ ipbuf, iface->ifname);
+
if (ndm->ndm_flags & NTF_PROXY) {
/* Dump and flush proxy entries */
if (hdr->nlmsg_type == RTM_NEWNEIGH) {
if (add && !(ndm->ndm_state &
(NUD_REACHABLE | NUD_STALE | NUD_DELAY | NUD_PROBE |
- NUD_PERMANENT | NUD_NOARP))) {
- if (!IN6_ARE_ADDR_EQUAL(&last_solicited, addr)) {
- last_solicited = *addr;
- setup_ping6(addr, iface);
- }
-
+ NUD_PERMANENT | NUD_NOARP)))
return NL_OK;
- }
setup_addr_for_relaying(addr, iface, add);
setup_route(addr, iface, add);
return NL_OK;
}
-static void catch_rtnetlink(int error)
+static void catch_rtnl_err(struct odhcpd_event *e, int error)
{
- if (error == ENOBUFS)
- dump_addr_table();
+ struct event_socket *ev_sock = container_of(e, struct event_socket, ev);
+
+ if (error != ENOBUFS)
+ goto err;
+
+ /* Double netlink event buffer size */
+ ev_sock->sock_bufsize *= 2;
+
+ if (nl_socket_set_buffer_size(ev_sock->sock, ev_sock->sock_bufsize, 0))
+ goto err;
+
+ dump_addr6_table();
+ return;
+
+err:
+ odhcpd_deregister(e);
}
projects / project / odhcpd.git / blobdiff