From 4a58bef7322b830b2e87be39c611a1bf4845ef49 Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Wed, 2 Jan 2013 14:28:09 +0100
Subject: [PATCH] Implement RFC 3319 options

---
 src/dhcpv6.c  | 13 ++++++++++++-
 src/odhcp6c.c |  2 ++
 src/odhcp6c.h |  4 ++++
 src/script.c  |  6 ++++++
 4 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index e93d894..9a451d0 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -574,12 +574,15 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 	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;
@@ -648,7 +651,8 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 				t3 = n;
 
 		} else if (otype == DHCPV6_OPT_DNS_SERVERS) {
-			odhcp6c_add_state(STATE_DNS, odata, olen);
+			if (olen == 16)
+				odhcp6c_add_state(STATE_DNS, odata, olen);
 		} else if (otype == DHCPV6_OPT_DNS_DOMAIN) {
 			odhcp6c_add_state(STATE_SEARCH, odata, olen);
 		} else if (otype == DHCPV6_OPT_NTP_SERVER) {
@@ -665,6 +669,11 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 					odhcp6c_add_state(STATE_SNTP_FQDN,
 							sdata, slen);
 			}
+		} else if (otype == DHCPV6_OPT_SIP_SERVER_A) {
+			if (olen == 16)
+				odhcp6c_add_state(STATE_SIP_IP, odata, olen);
+		} else if (otype == DHCPV6_OPT_SIP_SERVER_D) {
+			odhcp6c_add_state(STATE_SIP_FQDN, odata, olen);
 		} else if (otype == DHCPV6_OPT_INFO_REFRESH && olen >= 4) {
 			uint32_t refresh = ntohl(*((uint32_t*)odata));
 			if (refresh < (uint32_t)t1)
@@ -683,6 +692,8 @@ static int dhcpv6_handle_reply(_unused enum dhcpv6_msg orig,
 				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);
diff --git a/src/odhcp6c.c b/src/odhcp6c.c
index f3634d2..163db09 100644
--- a/src/odhcp6c.c
+++ b/src/odhcp6c.c
@@ -173,6 +173,8 @@ int main(_unused int argc, char* const argv[])
 		odhcp6c_clear_state(STATE_IA_PD_LOST);
 		odhcp6c_clear_state(STATE_SNTP_IP);
 		odhcp6c_clear_state(STATE_SNTP_FQDN);
+		odhcp6c_clear_state(STATE_SIP_IP);
+		odhcp6c_clear_state(STATE_SIP_FQDN);
 		dhcpv6_set_ia_na_mode(ia_na_mode);
 
 		alarm(timeout);
diff --git a/src/odhcp6c.h b/src/odhcp6c.h
index 2b3ce9f..442393b 100644
--- a/src/odhcp6c.h
+++ b/src/odhcp6c.h
@@ -49,6 +49,8 @@ enum dhcvp6_opt {
 	DHCPV6_OPT_INFO_REFRESH = 32,
 	DHCPV6_OPT_FQDN = 39,
 	DHCPV6_OPT_NTP_SERVER = 56,
+	DHCPV6_OPT_SIP_SERVER_D = 21,
+	DHCPV6_OPT_SIP_SERVER_A = 22,
 };
 
 enum dhcpv6_opt_npt {
@@ -159,6 +161,8 @@ enum odhcp6c_state {
 	STATE_CUSTOM_OPTS,
 	STATE_SNTP_IP,
 	STATE_SNTP_FQDN,
+	STATE_SIP_IP,
+	STATE_SIP_FQDN,
 	_STATE_MAX
 };
 
diff --git a/src/script.c b/src/script.c
index d082ff6..ae791cc 100644
--- a/src/script.c
+++ b/src/script.c
@@ -160,11 +160,15 @@ void script_call(const char *status)
 {
 	syslog(LOG_WARNING, "State for %s changed to %s", argv[1], status);
 	size_t dns_len, search_len, custom_len, sntp_ip_len, sntp_dns_len;
+	size_t sip_ip_len, sip_fqdn_len;
+
 	struct in6_addr *dns = odhcp6c_get_state(STATE_DNS, &dns_len);
 	uint8_t *search = odhcp6c_get_state(STATE_SEARCH, &search_len);
 	uint8_t *custom = odhcp6c_get_state(STATE_CUSTOM_OPTS, &custom_len);
 	struct in6_addr *sntp = odhcp6c_get_state(STATE_SNTP_IP, &sntp_ip_len);
 	uint8_t *sntp_dns = odhcp6c_get_state(STATE_SNTP_FQDN, &sntp_dns_len);
+	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, lost_pd_len;
 	uint8_t *prefix = odhcp6c_get_state(STATE_IA_PD, &prefix_len);
@@ -174,8 +178,10 @@ void script_call(const char *status)
 	if (fork() == 0) {
 		ipv6_to_env("RDNSS", dns, dns_len / sizeof(*dns));
 		ipv6_to_env("SNTP_IP", sntp, sntp_ip_len / sizeof(*sntp));
+		ipv6_to_env("SIP_IP", sip, sip_ip_len / sizeof(*sip));
 		fqdn_to_env("DOMAINS", search, search_len);
 		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);
 		prefix_to_env("PREFIXES_LOST", lost_pd, lost_pd_len);
-- 
2.39.2