odhpc6c: status code support in reply

The patch implements support for status code handling in
reply messages as described in RFC3313 paragraph 18.1.8.
The client will
*log the status codes returned by the client
*send a request if no binding status code is returned for
a given IA
*send further renew/rebind if the IA was not present in
the reply
*terminate message exchange when no prefix/no address
status code is returned in reponse to a request
*terminate message exchange when unspec fail status code
is returned
*calculate t1/t2/t3 when all IA's have been processed and
based on recorded t1/t2/valid timer values per IA

Without this patch I have seen issues with request messages
send without any IA_PD/IA_NA and t1/t2/t3 timer values which
were not correct. These changes have been tested intensive
against an ISC DHCPv6 server

Signed-off-by: Hans Dedecker <hans.dedecker@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/odhcp6c.h b/src/odhcp6c.h
index 5b9b78f..183ed44 100644
--- a/src/odhcp6c.h
+++ b/src/odhcp6c.h
@@ -81,8 +81,14 @@ enum dhcpv6_msg {
 };
 
 enum dhcpv6_status {
+	DHCPV6_Success = 0,
+	DHCPV6_UnspecFail = 1,
 	DHCPV6_NoAddrsAvail = 2,
+	DHCPV6_NoBinding = 3,
+	DHCPV6_NotOnLink = 4,
+	DHCPV6_UseMulticast = 5,
 	DHCPV6_NoPrefixAvail = 6,
+	_DHCPV6_Status_Max
 };
 
 typedef int(reply_handler)(enum dhcpv6_msg orig, const int rc,
@@ -219,6 +225,8 @@ struct odhcp6c_entry {
 	struct in6_addr target;
 	uint32_t valid;
 	uint32_t preferred;
+	uint32_t t1;
+	uint32_t t2;
 	uint16_t class;
 };
 
@@ -240,6 +248,7 @@ void script_delay_call(const char *status, int timeout);
 bool odhcp6c_signal_process(void);
 uint64_t odhcp6c_get_milli_time(void);
 void odhcp6c_random(void *buf, size_t len);
+bool odhcp6c_is_bound(void);
 
 // State manipulation
 void odhcp6c_clear_state(enum odhcp6c_state state);