X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;f=src%2Fdhcpv6.c;h=785b57b03aedf1543dea2ff08a08594599873ceb;hb=8e50917e51f7f21c53f9021063670065c8fa06d8;hp=64c0cb44e90107b184590d6d265e03286c09c8c6;hpb=007ae1a6ae8092878adccde1f610ea9dd86e5aad;p=odhcp6c.git

diff --git a/src/dhcpv6.c b/src/dhcpv6.c
index 64c0cb4..785b57b 100644
--- a/src/dhcpv6.c
+++ b/src/dhcpv6.c
@@ -142,8 +142,12 @@ int init_dhcpv6(const char *ifname, int request_pd)
 			htons(DHCPV6_OPT_DNS_SERVERS),
 			htons(DHCPV6_OPT_DNS_DOMAIN),
 			htons(DHCPV6_OPT_NTP_SERVER),
+			htons(DHCPV6_OPT_SIP_SERVER_A),
 			htons(DHCPV6_OPT_AFTR_NAME),
 			htons(DHCPV6_OPT_PD_EXCLUDE),
+#ifdef EXT_PREFIX_CLASS
+			htons(DHCPV6_OPT_PREFIX_CLASS),
+#endif
 	};
 	odhcp6c_add_state(STATE_ORO, oro, sizeof(oro));
 
@@ -559,14 +563,21 @@ static int dhcpv6_handle_reconfigure(_unused enum dhcpv6_msg orig,
 
 
 // Collect all advertised servers
-static int dhcpv6_handle_advert(_unused enum dhcpv6_msg orig,
+static int dhcpv6_handle_advert(enum dhcpv6_msg orig,
 		const void *opt, const void *end)
 {
 	uint16_t olen, otype;
 	uint8_t *odata;
-	struct dhcpv6_server_cand cand = {false, false, 0, 0, {0}};
+	struct dhcpv6_server_cand cand = {false, false, 0, 0, {0}, NULL, NULL, 0, 0};
 
 	dhcpv6_for_each_option(opt, end, otype, olen, odata) {
+		if (orig == DHCPV6_MSG_SOLICIT &&
+				(otype == DHCPV6_OPT_IA_PD || otype == DHCPV6_OPT_IA_NA) &&
+				olen > sizeof(struct dhcpv6_ia_hdr)) {
+			struct dhcpv6_ia_hdr *ia_hdr = (void*)(&odata[-4]);
+			dhcpv6_parse_ia(&ia_hdr[1], odata + olen);
+		}
+
 		if (otype == DHCPV6_OPT_SERVERID && olen <= 130) {
 			memcpy(cand.duid, odata, olen);
 			cand.duid_len = olen;
@@ -600,8 +611,16 @@ static int dhcpv6_handle_advert(_unused enum dhcpv6_msg orig,
 		}
 	}
 
-	if (cand.duid_len > 0)
+	if (cand.duid_len > 0) {
+		cand.ia_na = odhcp6c_move_state(STATE_IA_NA, &cand.ia_na_len);
+		cand.ia_pd = odhcp6c_move_state(STATE_IA_PD, &cand.ia_pd_len);
 		odhcp6c_add_state(STATE_SERVER_CAND, &cand, sizeof(cand));
+	}
+
+	if (orig == DHCPV6_MSG_SOLICIT) {
+		odhcp6c_clear_state(STATE_IA_NA);
+		odhcp6c_clear_state(STATE_IA_PD);
+	}
 
 	return -1;
 }
@@ -634,8 +653,14 @@ static int dhcpv6_commit_advert(void)
 		odhcp6c_add_state(STATE_SERVER_ID, hdr, sizeof(hdr));
 		odhcp6c_add_state(STATE_SERVER_ID, c->duid, c->duid_len);
 		accept_reconfig = c->wants_reconfigure;
+		odhcp6c_add_state(STATE_IA_NA, c->ia_na, c->ia_na_len);
+		odhcp6c_add_state(STATE_IA_PD, c->ia_pd, c->ia_pd_len);
 	}
 
+	for (size_t i = 0; i < cand_len / sizeof(*c); ++i) {
+		free(cand[i].ia_na);
+		free(cand[i].ia_pd);
+	}
 	odhcp6c_clear_state(STATE_SERVER_CAND);
 
 	if (!c)
@@ -691,6 +716,12 @@ static int dhcpv6_handle_reply(enum dhcpv6_msg orig,
 		t1 = t2 = t3 = UINT32_MAX;
 	}
 
+	if (orig == DHCPV6_MSG_REQUEST) {
+		// Delete NA and PD we have in the state from the Advert
+		odhcp6c_clear_state(STATE_IA_NA);
+		odhcp6c_clear_state(STATE_IA_PD);
+	}
+
 	if (opt) {
 		odhcp6c_clear_state(STATE_DNS);
 		odhcp6c_clear_state(STATE_SEARCH);
@@ -800,11 +831,11 @@ static uint32_t dhcpv6_parse_ia(void *opt, void *end)
 	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) {
+		struct odhcp6c_entry entry = {IN6ADDR_ANY_INIT, 0, 0,
+				IN6ADDR_ANY_INIT, 0, 0, 0};
+
 		if (otype == DHCPV6_OPT_IA_PREFIX) {
 			struct dhcpv6_ia_prefix *prefix = (void*)&odata[-4];
 			if (olen + 4U < sizeof(*prefix))
@@ -818,11 +849,19 @@ static uint32_t dhcpv6_parse_ia(void *opt, void *end)
 
 			entry.length = prefix->prefix;
 			entry.target = prefix->addr;
+			uint16_t stype, slen;
+			uint8_t *sdata;
+
+#ifdef EXT_PREFIX_CLASS
+                        // Find prefix class, if any
+			dhcpv6_for_each_option(&prefix[1], odata + olen,
+					stype, slen, sdata)
+				if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
+					entry.class = sdata[0] << 8 | sdata[1];
+#endif
 
 			// Parse PD-exclude
 			bool ok = true;
-			uint16_t stype, slen;
-			uint8_t *sdata;
 			dhcpv6_for_each_option(odata + sizeof(*prefix) - 4U,
 					odata + olen, stype, slen, sdata) {
 				if (stype != DHCPV6_OPT_PD_EXCLUDE || slen < 2)
@@ -877,9 +916,18 @@ static uint32_t dhcpv6_parse_ia(void *opt, void *end)
 			entry.length = 128;
 			entry.target = addr->addr;
 
+#ifdef EXT_PREFIX_CLASS
+			uint16_t stype, slen;
+			uint8_t *sdata;
+			// Find prefix class, if any
+			dhcpv6_for_each_option(&addr[1], odata + olen,
+					stype, slen, sdata)
+				if (stype == DHCPV6_OPT_PREFIX_CLASS && slen == 2)
+					entry.class = sdata[0] << 8 | sdata[1];
+#endif
+
 			odhcp6c_update_entry(STATE_IA_NA, &entry);
 		}
-
 		if (entry.valid > 0 && timeout > entry.valid)
 			timeout = entry.valid;
 	}