X-Git-Url: http://git.archive.openwrt.org/?p=project%2Fodhcpd.git;a=blobdiff_plain;f=src%2Fodhcpd.c;h=8a1c66e6721a37c83af600ba8b29ef401744e29b;hp=ed96178ba48de3140833d49524a7463343536987;hb=9268ca65d6e000b6cd4ed72d4a8fa427dada6f06;hpb=fa57225cb62b43adffc37a50c3dbd3fa7d225b0b;ds=sidebyside

diff --git a/src/odhcpd.c b/src/odhcpd.c
index ed96178..8a1c66e 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -24,6 +24,7 @@
 #include <unistd.h>
 #include <signal.h>
 #include <stdbool.h>
+#include <syslog.h>
 
 #include <arpa/inet.h>
 #include <net/if.h>
@@ -53,7 +54,6 @@ static int ioctl_sock;
 static struct nl_sock *rtnl_socket = NULL;
 static int urandom_fd = -1;
 
-
 static void sighandler(_unused int signal)
 {
 	uloop_end();
@@ -65,7 +65,7 @@ static void print_usage(const char *app)
 	"== %s Usage ==\n\n"
 	"  -h, --help   Print this help\n"
 	"  -l level     Specify log level 0..7 (default %d)\n",
-		app, LOG_WARNING
+		app, config.log_level
 	);
 }
 
@@ -73,19 +73,19 @@ int main(int argc, char **argv)
 {
 	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) {
@@ -336,7 +336,7 @@ out:
 	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};
@@ -354,6 +354,51 @@ int odhcpd_get_linklocal_interface_address(int ifindex, struct in6_addr *lladdr)
 	return status;
 }
 
+/*
+ * 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,
 		const uint32_t metric, const bool add)