From: Steven Barth <steven@midlink.org>
Date: Wed, 30 Jan 2013 19:19:11 +0000 (+0100)
Subject: Add RA-handling support
X-Git-Tag: debian/1.1+git20160131-1~197
X-Git-Url: https://git.decadent.org.uk/gitweb/?a=commitdiff_plain;h=806ebbc1f4dd848c2d19b56f5be84db16fada612;p=odhcp6c.git

Add RA-handling support
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a268553..0db7aed 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,8 +7,7 @@ set(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -std=c99")
 add_definitions(-D_GNU_SOURCE -Wall -Werror -Wextra -pedantic)
 
-add_executable(odhcp6c src/odhcp6c.c src/dhcpv6.c 
-	src/rtnetlink.c src/script.c)
+add_executable(odhcp6c src/odhcp6c.c src/dhcpv6.c src/ra.c src/script.c)
 target_link_libraries(odhcp6c resolv)
 
 # Installation
diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index 28fad50..599870e 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -50,7 +50,7 @@ static reply_handler dhcpv6_handle_reply;
 static reply_handler dhcpv6_handle_advert;
 static reply_handler dhcpv6_handle_rebind_reply;
 static reply_handler dhcpv6_handle_reconfigure;
-static int dhcpv6_commit_advert(uint32_t elapsed);
+static int dhcpv6_commit_advert(void);
 
 
 
@@ -75,7 +75,6 @@ static struct dhcpv6_retx dhcpv6_retx[_DHCPV6_MSG_MAX] = {
 
 // Sockets
 static int sock = -1;
-static int urandom_fd = -1;
 static int ifindex = -1;
 static time_t t1 = 0, t2 = 0, t3 = 0;
 
@@ -89,9 +88,6 @@ static bool accept_reconfig = false;
 int init_dhcpv6(const char *ifname, int request_pd)
 {
 	request_prefix = request_pd;
-	urandom_fd = open("/dev/urandom", O_CLOEXEC | O_RDONLY);
-	if (urandom_fd < 0)
-		return -1;
 
 	sock = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
 
@@ -164,18 +160,6 @@ void dhcpv6_set_ia_na_mode(enum odhcp6c_ia_mode mode)
 }
 
 
-void dhcpv6_remove_addrs(void)
-{
-	size_t ia_na_len;
-	uint8_t *odata, *ia_na = odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
-	uint16_t otype, olen;
-	dhcpv6_for_each_option(ia_na, ia_na + ia_na_len, otype, olen, odata) {
-		struct dhcpv6_ia_addr *addr = (void*)&odata[-4];
-		set_rtnetlink_addr(ifindex, &addr->addr, 0, 0);
-	}
-}
-
-
 static void dhcpv6_send(enum dhcpv6_msg type, uint8_t trid[3], uint32_t ecs)
 {
 	// Build FQDN
@@ -203,8 +187,9 @@ static void dhcpv6_send(enum dhcpv6_msg type, uint8_t trid[3], uint32_t ecs)
 	void *srv_id = odhcp6c_get_state(STATE_SERVER_ID, &srv_id_len);
 
 	// Build IA_PDs
-	size_t ia_pd_len;
-	void *ia_pd = odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
+	size_t ia_pd_entry_len, ia_pd_len = 0;
+	void *ia_pd = NULL;
+	void *ia_pd_entries = odhcp6c_get_state(STATE_IA_PD, &ia_pd_entry_len);
 	struct dhcpv6_ia_hdr hdr_ia_pd = {
 		htons(DHCPV6_OPT_IA_PD),
 		htons(sizeof(hdr_ia_pd) - 4 + ia_pd_len),
@@ -216,7 +201,21 @@ static void dhcpv6_send(enum dhcpv6_msg type, uint8_t trid[3], uint32_t ecs)
 		.len = htons(25), .prefix = request_prefix
 	};
 
-	if (ia_pd_len == 0 && request_prefix > 0 &&
+	if (ia_pd_entry_len > 0) {
+		struct odhcp6c_entry *e = ia_pd_entries;
+		size_t entries = ia_pd_entry_len / sizeof(*e);
+		struct dhcpv6_ia_prefix p[entries];
+		for (size_t i = 0; i < entries; ++i) {
+			p[i].type = htons(DHCPV6_OPT_IA_PREFIX);
+			p[i].len = htons(sizeof(p[i]) - 4U);
+			p[i].preferred = htonl(e[i].preferred);
+			p[i].valid = htonl(e[i].valid);
+			p[i].prefix = e[i].length;
+			p[i].addr = e[i].target;
+		}
+		ia_pd = p;
+		ia_pd_len = sizeof(p);
+	} else if (request_prefix > 0 &&
 			(type == DHCPV6_MSG_SOLICIT ||
 			type == DHCPV6_MSG_REQUEST)) {
 		ia_pd = &pref;
@@ -224,14 +223,30 @@ static void dhcpv6_send(enum dhcpv6_msg type, uint8_t trid[3], uint32_t ecs)
 	}
 
 	// Build IA_NAs
-	size_t ia_na_len;
-	void *ia_na = odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
+	size_t ia_na_entry_len, ia_na_len = 0;
+	void *ia_na = NULL;
+	void *ia_na_entries = odhcp6c_get_state(STATE_IA_NA, &ia_na_entry_len);
 	struct dhcpv6_ia_hdr hdr_ia_na = {
 		htons(DHCPV6_OPT_IA_NA),
 		htons(sizeof(hdr_ia_na) - 4 + ia_na_len),
 		1, 0, 0
 	};
 
+	if (ia_na_entry_len > 0) {
+		struct odhcp6c_entry *e = ia_na_entries;
+		size_t entries = ia_na_entry_len / sizeof(*e);
+		struct dhcpv6_ia_addr p[entries];
+		for (size_t i = 0; i < entries; ++i) {
+			p[i].type = htons(DHCPV6_OPT_IA_ADDR);
+			p[i].len = htons(sizeof(p[i]) - 4U);
+			p[i].addr = e[i].target;
+			p[i].preferred = htonl(e[i].preferred);
+			p[i].valid = htonl(e[i].valid);
+		}
+		ia_na = p;
+		ia_na_len = sizeof(p);
+	}
+
 	// Reconfigure Accept
 	struct {
 		uint16_t type;
@@ -306,7 +321,7 @@ static void dhcpv6_send(enum dhcpv6_msg type, uint8_t trid[3], uint32_t ecs)
 static int64_t dhcpv6_rand_delay(int64_t time)
 {
 	int random;
-	read(urandom_fd, &random, sizeof(random));
+	odhcp6c_random(&random, sizeof(random));
 	return (time * (random % 1000)) / 10000;
 }
 
@@ -341,7 +356,7 @@ int dhcpv6_request(enum dhcpv6_msg type)
 
 	// Generate transaction ID
 	uint8_t trid[3];
-	read(urandom_fd, trid, sizeof(trid));
+	odhcp6c_random(trid, sizeof(trid));
 	ssize_t len = -1;
 	int64_t rto = 0;
 
@@ -370,7 +385,7 @@ int dhcpv6_request(enum dhcpv6_msg type)
 		for (; len < 0 && round_start < round_end;
 				round_start = odhcp6c_get_milli_time()) {
 			// Check for pending signal
-			if (odhcp6c_signal_is_pending())
+			if (odhcp6c_signal_process())
 				return -1;
 
 			// Set timeout for receiving
@@ -395,14 +410,14 @@ int dhcpv6_request(enum dhcpv6_msg type)
 						"%ums", (unsigned)elapsed);
 
 				if (retx->handler_reply)
-					len = retx->handler_reply(type,
-						opt, opt_end, elapsed / 1000);
+					len = retx->handler_reply(
+							type, opt, opt_end);
 			}
 		}
 
 		// Allow
 		if (retx->handler_finish)
-			len = retx->handler_finish(elapsed / 1000);
+			len = retx->handler_finish();
 	} while (len < 0 && elapsed / 1000 < timeout);
 
 	return len;
@@ -459,7 +474,7 @@ int dhcpv6_poll_reconfigure(void)
 
 
 static int dhcpv6_handle_reconfigure(_unused enum dhcpv6_msg orig,
-		const void *opt, const void *end, uint32_t elapsed)
+		const void *opt, const void *end)
 {
 	// TODO: should verify the reconfigure message
 	uint16_t otype, olen;
@@ -470,27 +485,14 @@ static int dhcpv6_handle_reconfigure(_unused enum dhcpv6_msg orig,
 				odata[0] == DHCPV6_MSG_INFO_REQ))
 			msg = odata[0];
 
-	t1 -= elapsed;
-	t2 -= elapsed;
-	t3 -= elapsed;
-
-	if (t1 < 0)
-		t1 = 0;
-
-	if (t2 < 0)
-		t2 = 0;
-
-	if (t3 < 0)
-		t3 = 0;
-
-	dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, NULL, NULL, elapsed);
+	dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, NULL, NULL);
 	return msg;
 }
 
 
 // Collect all advertised servers
 static int dhcpv6_handle_advert(_unused enum dhcpv6_msg orig,
-		const void *opt, const void *end, _unused uint32_t elapsed)
+		const void *opt, const void *end)
 {
 	uint16_t olen, otype;
 	uint8_t *odata;
@@ -537,7 +539,7 @@ static int dhcpv6_handle_advert(_unused enum dhcpv6_msg orig,
 }
 
 
-static int dhcpv6_commit_advert(_unused uint32_t elapsed)
+static int dhcpv6_commit_advert(void)
 {
 	size_t cand_len;
 	struct dhcpv6_server_cand *c = NULL, *cand =
@@ -578,60 +580,54 @@ static int dhcpv6_commit_advert(_unused uint32_t elapsed)
 
 
 static int dhcpv6_handle_rebind_reply(enum dhcpv6_msg orig,
-		const void *opt, const void *end, uint32_t elapsed)
+		const void *opt, const void *end)
 {
-	dhcpv6_handle_advert(orig, opt, end, elapsed);
-	if (dhcpv6_commit_advert(elapsed) < 0)
+	dhcpv6_handle_advert(orig, opt, end);
+	if (dhcpv6_commit_advert() < 0) {
+		dhcpv6_handle_reply(DHCPV6_MSG_UNKNOWN, NULL, NULL);
 		return -1;
+	}
 
-	return dhcpv6_handle_reply(orig, opt, end, elapsed);
+	return dhcpv6_handle_reply(orig, opt, end);
 }
 
 
-static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
-		const void *opt, const void *end, uint32_t elapsed)
+static int dhcpv6_handle_reply(enum dhcpv6_msg orig,
+		const void *opt, const void *end)
 {
-	uint16_t otype, olen;
 	uint8_t *odata;
-	bool have_update = false;
-
-	t1 = t2 = t3 = 86400;
-
-	size_t ia_na_len, dns_len, search_len, sntp_ip_len, sntp_dns_len;
-	size_t sip_ip_len, sip_fqdn_len;
-	uint8_t *ia_na = odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
-	uint8_t *ia_end;
-	odhcp6c_get_state(STATE_DNS, &dns_len);
-	odhcp6c_get_state(STATE_SEARCH, &search_len);
-	odhcp6c_get_state(STATE_SNTP_IP, &sntp_ip_len);
-	odhcp6c_get_state(STATE_SNTP_FQDN, &sntp_dns_len);
-	odhcp6c_get_state(STATE_SIP_IP, &sip_ip_len);
-	odhcp6c_get_state(STATE_SIP_FQDN, &sip_fqdn_len);
-
-	// Decrease valid and preferred lifetime of prefixes
-	size_t ia_pd_len;
-	uint8_t *ia_pd = odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
-	dhcpv6_for_each_option(ia_pd, ia_pd + ia_pd_len, otype, olen, odata) {
-		struct dhcpv6_ia_prefix *p = (void*)&odata[-4];
-		uint32_t valid = ntohl(p->valid);
-		if (valid != UINT32_MAX)
-			p->valid = (valid < elapsed) ? 0 : htonl(valid - elapsed);
-
-		uint32_t pref = ntohl(p->preferred);
-		if (pref != UINT32_MAX)
-			p->preferred = (pref < elapsed) ? 0 : htonl(pref - elapsed);
-	}
+	uint16_t otype, olen;
 
-	// Decrease valid and preferred lifetime of addresses
-	dhcpv6_for_each_option(ia_na, ia_na + ia_na_len, otype, olen, odata) {
-		struct dhcpv6_ia_addr *p = (void*)&odata[-4];
-		uint32_t valid = ntohl(p->valid);
-		if (valid != UINT32_MAX)
-			p->valid = (valid < elapsed) ? 0 : htonl(valid - elapsed);
+	static time_t last_update = 0;
+	time_t now = odhcp6c_get_milli_time() / 1000;
+
+	uint32_t elapsed = now - last_update;
+	odhcp6c_expire();
+
+	if (orig == DHCPV6_MSG_UNKNOWN) {
+		t1 -= elapsed;
+		t2 -= elapsed;
+		t3 -= elapsed;
+
+		if (t1 < 0)
+			t1 = 0;
+
+		if (t2 < 0)
+			t2 = 0;
+
+		if (t3 < 0)
+			t3 = 0;
+	} else {
+		t1 = t2 = t3 = 86400;
+	}
 
-		uint32_t pref = ntohl(p->preferred);
-		if (pref != UINT32_MAX)
-			p->preferred = (pref < elapsed) ? 0 : htonl(pref - elapsed);
+	if (opt) {
+		odhcp6c_clear_state(STATE_DNS);
+		odhcp6c_clear_state(STATE_SEARCH);
+		odhcp6c_clear_state(STATE_SNTP_IP);
+		odhcp6c_clear_state(STATE_SNTP_FQDN);
+		odhcp6c_clear_state(STATE_SIP_IP);
+		odhcp6c_clear_state(STATE_SIP_FQDN);
 	}
 
 	// Parse and find all matching IAs
@@ -662,11 +658,6 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 			if (l_t2 > 0 && t2 > l_t2)
 				t2 = l_t2;
 
-			// Always report update in case we have IA_PDs so that
-			// the state-script is called with updated times
-			if (otype == DHCPV6_OPT_IA_PD && request_prefix)
-				have_update = true;
-
 			time_t n = dhcpv6_parse_ia(&ia_hdr[1], odata + olen);
 
 			if (n < t1)
@@ -713,56 +704,18 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 		}
 	}
 
-	if (opt) {
-		have_update |= odhcp6c_commit_state(STATE_DNS, dns_len);
-		have_update |= odhcp6c_commit_state(STATE_SEARCH, search_len);
-		have_update |= odhcp6c_commit_state(STATE_SNTP_IP,
-				sntp_ip_len);
-		have_update |= odhcp6c_commit_state(STATE_SNTP_FQDN,
-				sntp_dns_len);
-		have_update |= odhcp6c_commit_state(STATE_SIP_IP, sip_ip_len);
-		have_update |= odhcp6c_commit_state(STATE_SIP_FQDN, sip_fqdn_len);
-		size_t new_ia_pd_len, new_ia_na_len;
-		odhcp6c_get_state(STATE_IA_PD, &new_ia_pd_len);
-		odhcp6c_get_state(STATE_IA_NA, &new_ia_na_len);
-		have_update |= (new_ia_pd_len != ia_pd_len) ||
-				(new_ia_na_len != ia_na_len);
-	}
-
-	// Delete prefixes with 0 valid-time
-	ia_pd = odhcp6c_get_state(STATE_IA_PD, &ia_pd_len);
-	ia_end = ia_pd + ia_pd_len;
-	dhcpv6_for_each_option(ia_pd, ia_end, otype, olen, odata) {
-		struct dhcpv6_ia_prefix *p = (void*)&odata[-4];
-		while (!p->valid) {
-			ia_end = ia_pd + odhcp6c_remove_state(STATE_IA_PD,
-					(uint8_t*)p - ia_pd, olen + 4);
-			have_update = true;
-		}
-	}
-
-
-	// Delete addresses with 0 valid-time
-	ia_na = odhcp6c_get_state(STATE_IA_NA, &ia_na_len);
-	ia_end = ia_na + ia_na_len;
-	dhcpv6_for_each_option(ia_na, ia_end, otype, olen, odata) {
-		struct dhcpv6_ia_addr *p = (void*)&odata[-4];
-		while (!p->valid) {
-			ia_end = ia_na + odhcp6c_remove_state(STATE_IA_NA,
-					(uint8_t*)p - ia_na, olen + 4);
-			have_update = true;
-		}
-	}
-
-	return have_update;
+	return true;
 }
 
 
 static time_t dhcpv6_parse_ia(void *opt, void *end)
 {
 	uint32_t timeout = UINT32_MAX; // Minimum timeout
-	uint16_t otype, olen, stype, slen;
-	uint8_t *odata, *sdata;
+	uint16_t otype, olen;
+	uint8_t *odata;
+
+	struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT,
+			0, 0, IN6ADDR_ANY_INIT, 0, 0};
 
 	// Update address IA
 	dhcpv6_for_each_option(opt, end, otype, olen, odata) {
@@ -771,71 +724,35 @@ static time_t dhcpv6_parse_ia(void *opt, void *end)
 			if (olen + 4U < sizeof(*prefix))
 				continue;
 
-			olen = sizeof(*prefix); // Normalize length
-			uint32_t valid = ntohl(prefix->valid);
-			uint32_t pref = ntohl(prefix->preferred);
+			entry.valid = ntohl(prefix->valid);
+			entry.preferred = ntohl(prefix->preferred);
 
-			if (pref > valid)
+			if (entry.preferred > entry.valid)
 				continue;
 
-			// Search matching IA
-			struct dhcpv6_ia_prefix *local = NULL;
-			size_t pd_len;
-			uint8_t *pd = odhcp6c_get_state(STATE_IA_PD, &pd_len);
-			dhcpv6_for_each_option(pd, pd + pd_len,
-					stype, slen, sdata)
-				if (!memcmp(sdata + 8, odata + 8,
-						sizeof(local->addr) + 1))
-					local = (void*)&sdata[-4];
-
-			if (local) { // Already know that IA
-				local->preferred = prefix->preferred;
-				local->valid = prefix->valid;
-			} else { // New IA
-				odhcp6c_add_state(STATE_IA_PD, prefix, olen);
-			}
+			entry.length = prefix->prefix;
+			entry.target = prefix->addr;
 
-			if (timeout > valid)
-				timeout = valid;
+			odhcp6c_update_entry(STATE_IA_PD, &entry);
 		} else if (otype == DHCPV6_OPT_IA_ADDR) {
 			struct dhcpv6_ia_addr *addr = (void*)&odata[-4];
 			if (olen + 4U < sizeof(*addr))
 				continue;
 
-			olen = sizeof(*addr); // Normalize length
-			uint32_t pref = ntohl(addr->preferred);
-			uint32_t valid = ntohl(addr->valid);
+			entry.preferred = ntohl(addr->preferred);
+			entry.valid = ntohl(addr->valid);
 
-			if (pref > valid)
+			if (entry.preferred > entry.valid)
 				continue;
 
-			// Search matching IA
-			struct dhcpv6_ia_addr *local = NULL;
-			size_t na_len;
-			uint8_t *na = odhcp6c_get_state(STATE_IA_NA, &na_len);
-			dhcpv6_for_each_option(na, na + na_len,
-					stype, slen, sdata)
-				if (!memcmp(sdata, odata, sizeof(local->addr)))
-					local = (void*)&sdata[-4];
-
+			entry.length = 128;
+			entry.target = addr->addr;
 
-			if (local) { // Already know that IA
-				local->preferred = addr->preferred;
-				local->valid = addr->valid;
-			} else { // New IA
-				odhcp6c_add_state(STATE_IA_NA, addr, olen);
-			}
-
-
-			if (timeout > valid)
-				timeout = valid;
-
-			if (set_rtnetlink_addr(ifindex, &addr->addr,
-					pref, valid) == -EADDRNOTAVAIL) {
-				dhcpv6_request(DHCPV6_MSG_DECLINE);
-				raise(SIGUSR2);
-			}
+			odhcp6c_update_entry(STATE_IA_NA, &entry);
 		}
+
+		if (entry.valid > 0 && timeout > entry.valid)
+			timeout = entry.valid;
 	}
 
 	return timeout;
diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index 4e50758..6266aa4 100644
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -17,6 +17,7 @@
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stddef.h>
 #include <unistd.h>
 #include <syslog.h>
 #include <signal.h>
@@ -28,6 +29,7 @@
 #include <sys/syscall.h>
 
 #include "odhcp6c.h"
+#include "ra.h"
 
 
 static void sighandler(int signal);
@@ -38,6 +40,8 @@ static uint8_t *state_data[_STATE_MAX] = {NULL};
 static size_t state_len[_STATE_MAX] = {0};
 
 static volatile int do_signal = 0;
+static int urandom_fd = -1;
+static bool bound = false;
 
 
 int main(_unused int argc, char* const argv[])
@@ -122,12 +126,14 @@ int main(_unused int argc, char* const argv[])
 	if (help || !ifname)
 		return usage();
 
-	if (init_dhcpv6(ifname, request_pd) || init_rtnetlink() ||
+	if ((urandom_fd = open("/dev/urandom", O_CLOEXEC | O_RDONLY)) < 0 ||
+			init_dhcpv6(ifname, request_pd) || ra_init(ifname) ||
 			script_init(script, ifname)) {
 		syslog(LOG_ERR, "failed to initialize: %s", strerror(errno));
 		return 3;
 	}
 
+	signal(SIGIO, sighandler);
 	signal(SIGHUP, sighandler);
 	signal(SIGINT, sighandler);
 	signal(SIGCHLD, sighandler);
@@ -170,6 +176,7 @@ int main(_unused int argc, char* const argv[])
 		odhcp6c_clear_state(STATE_SIP_IP);
 		odhcp6c_clear_state(STATE_SIP_FQDN);
 		dhcpv6_set_ia_na_mode(ia_na_mode);
+		bound = false;
 
 		do_signal = 0;
 		int res = dhcpv6_request(DHCPV6_MSG_SOLICIT);
@@ -188,6 +195,8 @@ int main(_unused int argc, char* const argv[])
 				else if (res > 0)
 					script_call("informed");
 
+				bound = true;
+
 				if (dhcpv6_poll_reconfigure() > 0)
 					script_call("informed");
 			}
@@ -200,6 +209,7 @@ int main(_unused int argc, char* const argv[])
 			continue;
 
 		script_call("bound");
+		bound = true;
 
 		while (do_signal == 0 || do_signal == SIGUSR1) {
 			// Renew Cycle
@@ -254,15 +264,14 @@ int main(_unused int argc, char* const argv[])
 		odhcp6c_get_state(STATE_SERVER_ID, &server_id_len);
 
 		// Add all prefixes to lost prefixes
-		odhcp6c_clear_state(STATE_IA_PD);
+		bound = false;
 		script_call("unbound");
 
-		// Remove assigned addresses
-		if (ia_na_len > 0)
-			dhcpv6_remove_addrs();
-
 		if (server_id_len > 0 && (ia_pd_len > 0 || ia_na_len > 0))
 			dhcpv6_request(DHCPV6_MSG_RELEASE);
+
+		odhcp6c_clear_state(STATE_IA_NA);
+		odhcp6c_clear_state(STATE_IA_PD);
 	}
 
 	script_call("stopped");
@@ -314,8 +323,18 @@ static uint8_t* odhcp6c_resize_state(enum odhcp6c_state state, ssize_t len)
 }
 
 
-bool odhcp6c_signal_is_pending(void)
+bool odhcp6c_signal_process(void)
 {
+	if (do_signal == SIGIO) {
+		do_signal = 0;
+		bool updated = ra_process();
+		updated |= ra_rtnl_process();
+		if (updated && bound) {
+			odhcp6c_expire();
+			script_call("ra-updated");
+		}
+	}
+
 	return do_signal != 0;
 }
 
@@ -346,23 +365,92 @@ size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len)
 }
 
 
-bool odhcp6c_commit_state(enum odhcp6c_state state, size_t old_len)
+void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len)
+{
+	*len = state_len[state];
+	return state_data[state];
+}
+
+
+struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new)
 {
-	size_t new_len = state_len[state] - old_len;
-	uint8_t *old_data = state_data[state], *new_data = old_data + old_len;
-	bool upd = new_len != old_len || memcmp(old_data, new_data, new_len);
+	size_t len, cmplen = offsetof(struct odhcp6c_entry, target) + new->length / 8;
+	struct odhcp6c_entry *start = odhcp6c_get_state(state, &len);
+	struct odhcp6c_entry *x = NULL;
 
-	memmove(old_data, new_data, new_len);
-	odhcp6c_resize_state(state, -old_len);
+	for (struct odhcp6c_entry *c = start; !x && c < &start[len/sizeof(*c)]; ++c)
+		if (!memcmp(c, new, cmplen))
+			return c;
 
-	return upd;
+	return NULL;
 }
 
 
-void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len)
+void odhcp6c_update_entry_safe(enum odhcp6c_state state, const struct odhcp6c_entry *new, uint32_t safe)
 {
-	*len = state_len[state];
-	return state_data[state];
+	size_t len;
+	struct odhcp6c_entry *x = odhcp6c_find_entry(state, new);
+	struct odhcp6c_entry *start = odhcp6c_get_state(state, &len);
+
+	if (x && x->valid > new->valid && new->valid < safe)
+		return;
+
+	if (new->valid > 0) {
+		if (x)
+			*x = *new;
+		else
+			odhcp6c_add_state(state, new, sizeof(*new));
+	} else if (x) {
+		odhcp6c_remove_state(state, (x - start) * sizeof(*x), sizeof(*x));
+	}
+}
+
+
+void odhcp6c_update_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new)
+{
+	odhcp6c_update_entry_safe(state, new, 0);
+}
+
+
+static void odhcp6c_expire_list(enum odhcp6c_state state, uint32_t elapsed)
+{
+	size_t len;
+	struct odhcp6c_entry *start = odhcp6c_get_state(state, &len);
+	for (struct odhcp6c_entry *c = start; c < &start[len / sizeof(*c)]; ++c) {
+		if (c->preferred < elapsed)
+			c->preferred = 0;
+		else if (c->preferred != UINT32_MAX)
+			c->preferred -= elapsed;
+
+		if (c->valid < elapsed)
+			c->valid = 0;
+		else if (c->valid != UINT32_MAX)
+			c->valid -= elapsed;
+
+		if (!c->valid)
+			odhcp6c_remove_state(state, (c - start) * sizeof(*c), sizeof(*c));
+	}
+}
+
+
+void odhcp6c_expire(void)
+{
+	static time_t last_update = 0;
+	time_t now = odhcp6c_get_milli_time() / 1000;
+
+	uint32_t elapsed = now - last_update;
+	last_update = now;
+
+	odhcp6c_expire_list(STATE_RA_PREFIX, elapsed);
+	odhcp6c_expire_list(STATE_RA_ROUTE, elapsed);
+	odhcp6c_expire_list(STATE_IA_NA, elapsed);
+	odhcp6c_expire_list(STATE_IA_PD, elapsed);
+}
+
+
+void odhcp6c_random(void *buf, size_t len)
+{
+	read(urandom_fd, buf, len);
 }
 
 
@@ -374,6 +462,8 @@ static void sighandler(int signal)
 		do_signal = SIGUSR1;
 	else if (signal == SIGUSR2)
 		do_signal = SIGUSR2;
+	else if (signal == SIGIO)
+		do_signal = SIGIO;
 	else
 		do_signal = SIGTERM;
 }
diff --git a/src/odhcp6c.h b/src/odhcp6c.h
index 1a5aabc..440381a 100644
--- a/src/odhcp6c.h
+++ b/src/odhcp6c.h
@@ -80,7 +80,7 @@ enum dhcpv6_status {
 };
 
 typedef int(reply_handler)(enum dhcpv6_msg orig,
-		const void *opt, const void *end, uint32_t elapsed);
+		const void *opt, const void *end);
 
 // retransmission strategy
 struct dhcpv6_retx {
@@ -89,7 +89,7 @@ struct dhcpv6_retx {
 	uint16_t max_timeo;
 	char name[8];
 	reply_handler *handler_reply;
-	int(*handler_finish)(uint32_t elapsed);
+	int(*handler_finish)(void);
 };
 
 
@@ -162,6 +162,8 @@ enum odhcp6c_state {
 	STATE_SNTP_FQDN,
 	STATE_SIP_IP,
 	STATE_SIP_FQDN,
+	STATE_RA_ROUTE,
+	STATE_RA_PREFIX,
 	_STATE_MAX
 };
 
@@ -187,11 +189,20 @@ enum odhcp6c_ia_mode {
 };
 
 
+struct odhcp6c_entry {
+	struct in6_addr router;
+	uint16_t length;
+	int16_t priority;
+	struct in6_addr target;
+	uint32_t valid;
+	uint32_t preferred;
+};
+
+
 int init_dhcpv6(const char *ifname, int request_pd);
 void dhcpv6_set_ia_na_mode(enum odhcp6c_ia_mode mode);
 int dhcpv6_request(enum dhcpv6_msg type);
 int dhcpv6_poll_reconfigure(void);
-void dhcpv6_remove_addrs(void);
 
 int init_rtnetlink(void);
 int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
@@ -201,13 +212,19 @@ int script_init(const char *path, const char *ifname);
 ssize_t script_unhexlify(uint8_t *dst, size_t len, const char *src);
 void script_call(const char *status);
 
+bool odhcp6c_signal_process(void);
+uint64_t odhcp6c_get_milli_time(void);
+void odhcp6c_random(void *buf, size_t len);
 
 // State manipulation
-bool odhcp6c_signal_is_pending(void);
-uint64_t odhcp6c_get_milli_time(void);
 void odhcp6c_clear_state(enum odhcp6c_state state);
 void odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
 size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len);
-bool odhcp6c_commit_state(enum odhcp6c_state state, size_t old_len);
 void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len);
 
+// Entry manipulation
+struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new);
+void odhcp6c_update_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new);
+void odhcp6c_update_entry_safe(enum odhcp6c_state state, const struct odhcp6c_entry *new, uint32_t safe);
+
+void odhcp6c_expire(void);
diff --git a/src/ra.c b/src/ra.c
new file mode 100644
index 0000000..6874601
--- /dev/null
+++ b/src/ra.c
@@ -0,0 +1,264 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <signal.h>
+#include <string.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+#include <net/if.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+
+#include <linux/rtnetlink.h>
+
+
+#include "odhcp6c.h"
+#include "ra.h"
+
+
+static int sock = -1, rtnl_sock = -1;
+static unsigned if_index = 0;
+static char if_name[IF_NAMESIZE] = {0};
+static volatile int rs_attempt = 1;
+static struct in6_addr lladdr = IN6ADDR_ANY_INIT;
+
+static void ra_send_rs(int signal __attribute__((unused)));
+
+int ra_init(const char *ifname)
+{
+	sock = socket(AF_INET6, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_ICMPV6);
+	if_index = if_nametoindex(ifname);
+	strncpy(if_name, ifname, sizeof(if_name) - 1);
+
+	// Filter ICMPv6 package types
+	struct icmp6_filter filt;
+	ICMP6_FILTER_SETBLOCKALL(&filt);
+	ICMP6_FILTER_SETPASS(ND_ROUTER_ADVERT, &filt);
+	setsockopt(sock, IPPROTO_ICMPV6, ICMP6_FILTER, &filt, sizeof(filt));
+
+	// Bind to all-nodes
+	struct ipv6_mreq an = {ALL_IPV6_NODES, if_index};
+	setsockopt(sock, IPPROTO_IPV6, IPV6_ADD_MEMBERSHIP, &an, sizeof(an));
+
+	// Let the kernel compute our checksums
+	int val = 2;
+	setsockopt(sock, IPPROTO_RAW, IPV6_CHECKSUM, &val, sizeof(val));
+
+	// This is required by RFC 4861
+	val = 255;
+	setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &val, sizeof(val));
+
+	// Bind to one device
+	setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, ifname, strlen(ifname));
+
+	// Add async-mode
+	const pid_t ourpid = getpid();
+	fcntl(sock, F_SETOWN, ourpid);
+	fcntl(sock, F_SETFL, fcntl(sock, F_GETFL) | O_ASYNC);
+
+	// Get LL-addr
+	FILE *fp = fopen("/proc/net/if_inet6", "r");
+	if (fp) {
+		char addrbuf[33], ifbuf[16];
+		while (fscanf(fp, "%32s %*x %*x %*x %*x %15s", addrbuf, ifbuf) == 2) {
+			if (!strcmp(ifbuf, if_name)) {
+				script_unhexlify((uint8_t*)&lladdr, sizeof(lladdr), addrbuf);
+				break;
+			}
+		}
+		fclose(fp);
+	}
+
+	// Open rtnetlink socket
+	rtnl_sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
+	struct sockaddr_nl rtnl_kernel = { .nl_family = AF_NETLINK };
+	if (connect(rtnl_sock, (struct sockaddr*)&rtnl_kernel, sizeof(rtnl_kernel)))
+		return -1;
+	uint32_t group = RTNLGRP_IPV6_IFADDR;
+	setsockopt(rtnl_sock, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &group, sizeof(group));
+
+	// Add async-mode
+	fcntl(rtnl_sock, F_SETOWN, ourpid);
+	fcntl(rtnl_sock, F_SETFL, fcntl(rtnl_sock, F_GETFL) | O_ASYNC);
+
+	// Send RS
+	signal(SIGALRM, ra_send_rs);
+	ra_send_rs(SIGALRM);
+
+	return 0;
+}
+
+
+static void ra_send_rs(int signal __attribute__((unused)))
+{
+	const struct icmp6_hdr rs = {ND_ROUTER_SOLICIT, 0, 0, {{0}}};
+	const struct sockaddr_in6 dest = {AF_INET6, 0, 0, ALL_IPV6_ROUTERS, if_index};
+	sendto(sock, &rs, sizeof(rs), MSG_DONTWAIT, (struct sockaddr*)&dest, sizeof(dest));
+
+	if (++rs_attempt < 3)
+		alarm(4);
+}
+
+
+static int16_t pref_to_priority(uint8_t flags)
+{
+	flags = (flags >> 3) & 0x03;
+	return (flags == 0x00) ? 1024 : (flags == 0x01) ? 512 :
+			(flags == 0x11) ? 2048 : -1;
+}
+
+
+static void update_proc(const char *sect, const char *opt, uint32_t value)
+{
+	char buf[64];
+	snprintf(buf, sizeof(buf), "/proc/sys/net/ipv6/%s/%s/%s", sect, if_name, opt);
+
+	int fd = open(buf, O_WRONLY);
+	write(fd, buf, snprintf(buf, sizeof(buf), "%u", value));
+	close(fd);
+}
+
+
+static bool ra_deduplicate(const struct in6_addr *any, uint8_t length)
+{
+	struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT, length, 0, *any, 0, 0};
+	struct odhcp6c_entry *x = odhcp6c_find_entry(STATE_RA_PREFIX, &entry);
+	if (x) {
+		odhcp6c_random(&x->target.s6_addr32[2], 2 * sizeof(uint32_t));
+	} else if (odhcp6c_find_entry(STATE_IA_NA, &entry)) {
+		dhcpv6_request(DHCPV6_MSG_DECLINE);
+		raise(SIGUSR2);
+	}
+
+	return !!x;
+}
+
+
+bool ra_rtnl_process(void)
+{
+	bool found = false;
+	uint8_t buf[8192];
+	while (true) {
+		ssize_t len = recv(rtnl_sock, buf, sizeof(buf), MSG_DONTWAIT);
+		if (len < 0)
+			break;
+
+		for (struct nlmsghdr *nh = (struct nlmsghdr*)buf; NLMSG_OK(nh, len);
+					nh = NLMSG_NEXT(nh, len)) {
+			struct ifaddrmsg *ifa = NLMSG_DATA(nh);
+			struct in6_addr *addr = NULL;
+			if (nh->nlmsg_type != RTM_NEWADDR || NLMSG_PAYLOAD(nh, 0) < sizeof(*ifa) ||
+					!(ifa->ifa_flags & IFA_F_DADFAILED) ||
+					ifa->ifa_index != if_index)
+				continue;
+
+			ssize_t alen = NLMSG_PAYLOAD(nh, sizeof(*ifa));
+			for (struct rtattr *rta = (struct rtattr*)&ifa[1]; RTA_OK(rta, alen);
+					rta = RTA_NEXT(rta, alen))
+				if (rta->rta_type == IFA_LOCAL && RTA_PAYLOAD(rta) >= sizeof(*addr))
+					addr = RTA_DATA(rta);
+
+			if (addr)
+				found |= ra_deduplicate(addr, ifa->ifa_prefixlen);
+		}
+	}
+	return found;
+}
+
+
+bool ra_process(void)
+{
+	bool found = false;
+	uint8_t buf[1500];
+	struct nd_router_advert *adv = (struct nd_router_advert*)buf;
+	struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT, 0, 0, IN6ADDR_ANY_INIT, 0, 0};
+	const struct in6_addr any = IN6ADDR_ANY_INIT;
+	odhcp6c_expire();
+
+	while (true) {
+		struct sockaddr_in6 from;
+		socklen_t from_len = sizeof(from);
+		ssize_t len = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT, &from, &from_len);
+		if (len < 0)
+			break;
+		else if (len < (ssize_t)sizeof(*adv))
+			continue;
+
+		// Stop sending solicits
+		if (rs_attempt > 0) {
+			alarm(0);
+			rs_attempt = 0;
+		}
+
+		found = true;
+
+		// Parse default route
+		entry.router = from.sin6_addr;
+		entry.priority = pref_to_priority(adv->nd_ra_flags_reserved);
+		if (entry.priority < 0)
+			entry.priority = pref_to_priority(0);
+		entry.valid = ntohs(adv->nd_ra_router_lifetime);
+		entry.preferred = entry.valid;
+		odhcp6c_update_entry(STATE_RA_ROUTE, &entry);
+
+		// Parse ND parameters
+		if (adv->nd_ra_reachable)
+			update_proc("neigh", "base_reachable_time_ms", ntohl(adv->nd_ra_reachable));
+
+		if (adv->nd_ra_retransmit)
+			update_proc("neigh", "retrans_time_ms", ntohl(adv->nd_ra_retransmit));
+
+		// Evaluate options
+		struct icmpv6_opt *opt;
+		icmpv6_for_each_option(opt, &adv[1], &buf[len]) {
+			if (opt->type == ND_OPT_MTU) {
+				update_proc("conf", "mtu", ntohl(*((uint32_t*)&opt->data[2])));
+			} else if (opt->type == ND_OPT_ROUTE_INFORMATION && opt->len <= 3) {
+				entry.router = from.sin6_addr;
+				entry.target = any;
+				entry.priority = pref_to_priority(opt->data[1]);
+				entry.length = opt->data[0];
+				entry.valid = ntohl(*((uint32_t*)&opt->data[2]));
+				memcpy(&entry.target, &opt->data[6], (opt->len - 1) * 8);
+
+				if (entry.length > 128 || IN6_IS_ADDR_LINKLOCAL(&entry.target)
+						|| IN6_IS_ADDR_LOOPBACK(&entry.target)
+						|| IN6_IS_ADDR_MULTICAST(&entry.target))
+					continue;
+
+				if (entry.priority > 0)
+					odhcp6c_update_entry(STATE_RA_ROUTE, &entry);
+			} else if (opt->type == ND_OPT_PREFIX_INFORMATION && opt->len == 4) {
+				struct nd_opt_prefix_info *pinfo = (struct nd_opt_prefix_info*)opt;
+				entry.router = any;
+				entry.target = pinfo->nd_opt_pi_prefix;
+				entry.priority = 0;
+				entry.length = pinfo->nd_opt_pi_prefix_len;
+				entry.valid = ntohl(pinfo->nd_opt_pi_valid_time);
+				entry.preferred = ntohl(pinfo->nd_opt_pi_preferred_time);
+
+				if (entry.length > 128 || IN6_IS_ADDR_LINKLOCAL(&entry.target)
+						|| IN6_IS_ADDR_LOOPBACK(&entry.target)
+						|| IN6_IS_ADDR_MULTICAST(&entry.target)
+						|| entry.valid < entry.preferred)
+					continue;
+
+				if (pinfo->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_ONLINK)
+					odhcp6c_update_entry_safe(STATE_RA_ROUTE, &entry, 7201);
+
+				if (!(pinfo->nd_opt_pi_flags_reserved & ND_OPT_PI_FLAG_AUTO) ||
+						pinfo->nd_opt_pi_prefix_len != 64)
+					continue;
+
+				entry.target.s6_addr32[2] = lladdr.s6_addr32[2];
+				entry.target.s6_addr32[3] = lladdr.s6_addr32[3];
+
+				odhcp6c_update_entry_safe(STATE_RA_PREFIX, &entry, 7201);
+			}
+
+		}
+	}
+	return found;
+}
diff --git a/src/ra.h b/src/ra.h
new file mode 100644
index 0000000..37d9573
--- /dev/null
+++ b/src/ra.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#define ALL_IPV6_NODES {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}}}
+
+#define ALL_IPV6_ROUTERS {{{0xff, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}}}
+
+struct icmpv6_opt {
+	uint8_t type;
+	uint8_t len;
+	uint8_t data[6];
+};
+
+#define ND_OPT_ROUTE_INFORMATION 24
+
+
+#define icmpv6_for_each_option(opt, start, end)\
+	for (opt = (struct icmpv6_opt*)(start);\
+	(void*)(opt + 1) <= (void*)(end) && opt->len > 0 &&\
+	(void*)(opt + opt->len) <= (void*)(end); opt += opt->len)
+
+
+int ra_init(const char *ifname);
+bool ra_process(void);
+bool ra_rtnl_process(void);
diff --git a/src/rtnetlink.c b/src/rtnetlink.c
deleted file mode 100644
index 6017aab..0000000
--- a/src/rtnetlink.c
+++ /dev/null
@@ -1,115 +0,0 @@
-/**
- * Copyright (C) 2012 Steven Barth <steven@midlink.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License v2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <time.h>
-#include <errno.h>
-#include <stdlib.h>
-#include <string.h>
-#include <syslog.h>
-#include <stdbool.h>
-#include <arpa/inet.h>
-#include <sys/socket.h>
-#include <linux/rtnetlink.h>
-
-#include "odhcp6c.h"
-
-
-static int sock = -1;
-static unsigned seq = 0;
-
-
-// Init rtnetlink socket
-int init_rtnetlink(void)
-{
-	sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);
-	struct sockaddr_nl rtnl_kernel = { .nl_family = AF_NETLINK };
-	if (connect(sock, (struct sockaddr*)&rtnl_kernel, sizeof(rtnl_kernel)))
-		return -1;
-
-	return 0;
-}
-
-
-// CRUD addresses to interface
-int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
-		uint32_t pref, uint32_t valid)
-{
-	int flags = NLM_F_REQUEST | NLM_F_ACK;
-	int cmd = RTM_DELADDR;
-
-	if (valid) {
-		flags |= NLM_F_CREATE | NLM_F_REPLACE;
-		cmd = RTM_NEWADDR;
-	}
-
-	struct {
-		struct nlmsghdr nhm;
-		struct ifaddrmsg ifa;
-		struct rtattr rta_addr;
-		struct in6_addr addr;
-		struct rtattr rta_local;
-		struct in6_addr local;
-		struct rtattr rta_info;
-		struct ifa_cacheinfo info;
-	} req = {
-		{sizeof(req), cmd, flags, ++seq, 0},
-		{AF_INET6, 128, 0, RT_SCOPE_UNIVERSE, ifindex},
-		{sizeof(req.rta_addr) + sizeof(req.addr), IFA_ADDRESS},
-		*addr,
-		{sizeof(req.rta_local) + sizeof(req.local), IFA_LOCAL},
-		*addr,
-		{sizeof(req.rta_info) + sizeof(req.info), IFA_CACHEINFO},
-		{pref, valid, 0, 0}
-	};
-	send(sock, &req, sizeof(req), 0);
-
-	struct {
-		struct nlmsghdr nhm;
-		struct nlmsgerr err;
-	} reply;
-	recv(sock, &reply, sizeof(reply), 0);
-
-	char buf[INET6_ADDRSTRLEN];
-	inet_ntop(AF_INET6, addr, buf, sizeof(buf));
-	syslog(LOG_WARNING, "%s address %s/128 for iface %i: %s",
-			(valid) ? "assigning" : "removing", buf,
-			ifindex, strerror(-reply.err.error));
-
-	if (reply.err.error < 0 || valid == 0)
-		return reply.err.error;
-
-	// Check for duplicate addresses
-	struct timespec ts = {1, 0};
-	nanosleep(&ts, NULL);
-
-	req.nhm.nlmsg_type = RTM_GETADDR;
-	req.nhm.nlmsg_seq = ++seq;
-	req.nhm.nlmsg_flags = NLM_F_REQUEST;
-	send(sock, &req, sizeof(req), 0);
-
-	struct {
-		struct nlmsghdr nhm;
-		struct ifaddrmsg ifa;
-		uint8_t buf[1024];
-	} dad_reply;
-	recv(sock, &dad_reply, sizeof(dad_reply), 0);
-
-	if (dad_reply.nhm.nlmsg_type != RTM_NEWADDR ||
-			(dad_reply.ifa.ifa_flags & IFA_F_DADFAILED)) {
-		syslog(LOG_WARNING, "Removing duplicate address %s", buf);
-		set_rtnetlink_addr(ifindex, addr, 0, 0);
-		return -EADDRNOTAVAIL;
-	}
-	return 0;
-}
diff --git a/src/script.c b/src/script.c
index f0d4af2..0e01f3a 100644
--- a/src/script.c
+++ b/src/script.c
@@ -67,7 +67,7 @@ ssize_t script_unhexlify(uint8_t *dst, size_t len, const char *src)
 }
 
 
-void script_hexlify(char *dst, const uint8_t *src, size_t len) {
+static void script_hexlify(char *dst, const uint8_t *src, size_t len) {
 	for (size_t i = 0; i < len; ++i) {
 		*dst++ = hexdigits[src[i] >> 4];
 		*dst++ = hexdigits[src[i] & 0x0f];
@@ -129,28 +129,30 @@ static void bin_to_env(uint8_t *opts, size_t len)
 }
 
 
-static void prefix_to_env(const char *name, const uint8_t *fqdn, size_t len)
+static void entry_to_env(const char *name, const void *data, size_t len)
 {
 	size_t buf_len = strlen(name);
-	struct dhcpv6_ia_prefix *p = NULL;
-	char *buf = realloc(NULL, buf_len + 2 +
-			(len / sizeof(*p)) * (INET6_ADDRSTRLEN + 32));
+	const struct odhcp6c_entry *e = data;
+	const struct in6_addr any = IN6ADDR_ANY_INIT;
+	char *buf = realloc(NULL, buf_len + 2 + (len / sizeof(*e)) * 144);
 	memcpy(buf, name, buf_len);
 	buf[buf_len++] = '=';
 
-	uint16_t otype, olen;
-	uint8_t *odata;
-	dhcpv6_for_each_option(fqdn, &fqdn[len], otype, olen, odata) {
-		if (otype != DHCPV6_OPT_IA_PREFIX || olen + 4U < sizeof(*p))
-			continue;
-
-		p = (struct dhcpv6_ia_prefix*)&odata[-4];
-		inet_ntop(AF_INET6, &p->addr, &buf[buf_len], INET6_ADDRSTRLEN);
+	for (size_t i = 0; i < len / sizeof(*e); ++i) {
+		inet_ntop(AF_INET6, &e[i].target, &buf[buf_len], INET6_ADDRSTRLEN);
 		buf_len += strlen(&buf[buf_len]);
-		buf_len += snprintf(&buf[buf_len], 32, "/%hhu,%u,%u ",
-				p->prefix, ntohl(p->preferred),
-				ntohl(p->valid));
+		buf_len += snprintf(&buf[buf_len], 6, "/%hhu", e[i].length);
+		if (!IN6_ARE_ADDR_EQUAL(&any, &e[i].router)) {
+			buf[buf_len++] = '@';
+			inet_ntop(AF_INET6, &e[i].router, &buf[buf_len], INET6_ADDRSTRLEN);
+			buf_len += strlen(&buf[buf_len]);
+		}
+		buf_len += snprintf(&buf[buf_len], 24, ",%u,%u", e[i].preferred, e[i].valid);
+		if (e[i].priority)
+			buf_len += snprintf(&buf[buf_len], 12, ",%u", e[i].priority);
+		buf[buf_len++] = ' ';
 	}
+
 	buf[buf_len - 1] = '\0';
 	putenv(buf);
 }
@@ -170,8 +172,11 @@ void script_call(const char *status)
 	struct in6_addr *sip = odhcp6c_get_state(STATE_SIP_IP, &sip_ip_len);
 	uint8_t *sip_fqdn = odhcp6c_get_state(STATE_SIP_FQDN, &sip_fqdn_len);
 
-	size_t prefix_len;
+	size_t prefix_len, address_len, ra_pref_len, ra_route_len;
 	uint8_t *prefix = odhcp6c_get_state(STATE_IA_PD, &prefix_len);
+	uint8_t *address = odhcp6c_get_state(STATE_IA_NA, &address_len);
+	uint8_t *ra_pref = odhcp6c_get_state(STATE_RA_PREFIX, &ra_pref_len);
+	uint8_t *ra_route = odhcp6c_get_state(STATE_RA_ROUTE, &ra_route_len);
 
 	// Don't set environment before forking, because env is leaky.
 	if (fork() == 0) {
@@ -182,7 +187,10 @@ void script_call(const char *status)
 		fqdn_to_env("SNTP_FQDN", sntp_dns, sntp_dns_len);
 		fqdn_to_env("SIP_DOMAIN", sip_fqdn, sip_fqdn_len);
 		bin_to_env(custom, custom_len);
-		prefix_to_env("PREFIXES", prefix, prefix_len);
+		entry_to_env("PREFIXES", prefix, prefix_len);
+		entry_to_env("ADDRESSES", address, address_len);
+		entry_to_env("RA_ADDRESSES", ra_pref, ra_pref_len);
+		entry_to_env("RA_ROUTES", ra_route, ra_route_len);
 
 		argv[2] = (char*)status;
 		execv(argv[0], argv);