#include <unistd.h>
#include <signal.h>
#include <stdbool.h>
+#include <syslog.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <netpacket/packet.h>
#include <linux/netlink.h>
#include <linux/if_addr.h>
+#include <linux/neighbour.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
static struct nl_sock *rtnl_socket = NULL;
static int urandom_fd = -1;
-
static void sighandler(_unused int signal)
{
uloop_end();
{
printf(
"== %s Usage ==\n\n"
- " -h, --help Print this help\n"
- " -l level Specify log level 0..7 (default %d)\n",
- app, LOG_WARNING
+ " -h, --help Print this help\n"
+ " -l level Specify log level 0..7 (default %d)\n",
+ app, config.log_level
);
}
{
openlog("odhcpd", LOG_PERROR | LOG_PID, LOG_DAEMON);
int opt;
- int log_level = LOG_INFO;
+
while ((opt = getopt(argc, argv, "hl:")) != -1) {
switch (opt) {
case 'h':
print_usage(argv[0]);
return 0;
case 'l':
- log_level = atoi(optarg);
- fprintf(stderr, "Log level set to %d\n", log_level);
+ config.log_level = (atoi(optarg) & LOG_PRIMASK);
+ fprintf(stderr, "Log level set to %d\n", config.log_level);
break;
}
}
- setlogmask(LOG_UPTO(log_level));
+ setlogmask(LOG_UPTO(config.log_level));
uloop_init();
if (getuid() != 0) {
ioctl_sock = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
- if (!(rtnl_socket = odhcpd_create_nl_socket(NETLINK_ROUTE, 0))) {
+ if (!(rtnl_socket = odhcpd_create_nl_socket(NETLINK_ROUTE))) {
syslog(LOG_ERR, "Unable to open nl socket: %s", strerror(errno));
return 2;
}
return 0;
}
-struct nl_sock *odhcpd_create_nl_socket(int protocol, int groups)
+struct nl_sock *odhcpd_create_nl_socket(int protocol)
{
struct nl_sock *nl_sock;
if (!nl_sock)
goto err;
- if (groups)
- nl_join_groups(nl_sock, groups);
-
if (nl_connect(nl_sock, protocol) < 0)
goto err;
return ctxt.ret;
}
-int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr)
+static int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr)
{
int status = -1;
struct sockaddr_in6 addr = {AF_INET6, 0, 0, ALL_IPV6_ROUTERS, ifindex};
return status;
}
-int odhcpd_setup_route(const struct in6_addr *addr, int prefixlen,
+/*
+ * DNS address selection criteria order :
+ * - use IPv6 address with valid lifetime if none is yet selected
+ * - use IPv6 address with a preferred lifetime if the already selected IPv6 address is deprecated
+ * - use an IPv6 ULA address if the already selected IPv6 address is not an ULA address
+ * - use the IPv6 address with the longest preferred lifetime
+ */
+int odhcpd_get_interface_dns_addr(const struct interface *iface, struct in6_addr *addr)
+{
+ time_t now = odhcpd_time();
+ ssize_t m = -1;
+
+ for (size_t i = 0; i < iface->ia_addr_len; ++i) {
+ if (iface->ia_addr[i].valid <= (uint32_t)now)
+ continue;
+
+ if (m < 0) {
+ m = i;
+ continue;
+ }
+
+ if (iface->ia_addr[m].preferred >= (uint32_t)now &&
+ iface->ia_addr[i].preferred < (uint32_t)now)
+ continue;
+
+ if (IN6_IS_ADDR_ULA(&iface->ia_addr[i].addr)) {
+ if (!IN6_IS_ADDR_ULA(&iface->ia_addr[m].addr)) {
+ m = i;
+ continue;
+ }
+ } else if (IN6_IS_ADDR_ULA(&iface->ia_addr[m].addr))
+ continue;
+
+ if (iface->ia_addr[i].preferred > iface->ia_addr[m].preferred)
+ m = i;
+ }
+
+ if (m >= 0) {
+ *addr = iface->ia_addr[m].addr;
+ return 0;
+ }
+
+ return odhcpd_get_linklocal_interface_address(iface->ifindex, addr);
+}
+
+int odhcpd_setup_route(const struct in6_addr *addr, const int prefixlen,
const struct interface *iface, const struct in6_addr *gw,
- uint32_t metric, bool add)
+ const uint32_t metric, const bool add)
{
struct nl_msg *msg;
struct rtmsg rtm = {
return nl_wait_for_ack(rtnl_socket);
}
+int odhcpd_setup_proxy_neigh(const struct in6_addr *addr,
+ const struct interface *iface, const bool add)
+{
+ struct nl_msg *msg;
+ struct ndmsg ndm = {
+ .ndm_family = AF_INET6,
+ .ndm_flags = NTF_PROXY,
+ .ndm_ifindex = iface->ifindex,
+ };
+ int ret = 0, flags = NLM_F_REQUEST;
+
+ if (add)
+ flags |= NLM_F_REPLACE | NLM_F_CREATE;
+
+ msg = nlmsg_alloc_simple(add ? RTM_NEWNEIGH : RTM_DELNEIGH, flags);
+ if (!msg)
+ return -1;
+
+ nlmsg_append(msg, &ndm, sizeof(ndm), 0);
+
+ nla_put(msg, NDA_DST, sizeof(*addr), addr);
+
+ ret = nl_send_auto_complete(rtnl_socket, msg);
+ nlmsg_free(msg);
+
+ if (ret < 0)
+ return ret;
+
+ return nl_wait_for_ack(rtnl_socket);
+}
+
struct interface* odhcpd_get_interface_by_index(int ifindex)
{
struct interface *iface;
getsockopt(u->fd, SOL_SOCKET, SO_ERROR, &ret, &ret_len);
u->error = false;
if (e->handle_error)
- e->handle_error(ret);
+ e->handle_error(e, ret);
+ }
+
+ if (e->recv_msgs) {
+ e->recv_msgs(e);
+ return;
}
while (true) {
((event->handle_error) ? ULOOP_ERROR_CB : 0));
}
+int odhcpd_deregister(struct odhcpd_event *event)
+{
+ event->uloop.cb = NULL;
+ return uloop_fd_delete(&event->uloop);
+}
+
void odhcpd_process(struct odhcpd_event *event)
{
odhcpd_receive_packets(&event->uloop, 0);
projects / project / odhcpd.git / blobdiff