Fixed in development branch svn://svn.zabbix.com/branches/dev/ZBXNEXT-689

(1) Documentation updates:

• https://www.zabbix.com/documentation/3.0/manual/config/items/itemtypes/zabbix_agent#supported_item_keys
• https://www.zabbix.com/documentation/3.0/manual/introduction/whatsnew300

asaveljevs In the first link, it should say which version <protocol> parameter is supported from. REOPENED.

wiper Thanks, RESOLVED

asaveljevs CLOSED.

(2) r49701 rewrites dealing with the new sixth parameter in the same way as for other parameters. Please take a look.

wiper CLOSED

(3) If "tcp" is present, we do this:

+	if (0 != use_tcp)
+		_res.options |= RES_USEVC;

However, this has the same problem as ZBX-7648: once a DNS query is done over TCP, all following queries will also be done via TCP.

So _res.options should be restored after the query, same as it is done with _res.retrans and _res.retry.

wiper RESOLVED in r49721

asaveljevs If DNS server IP is invalid, then _res.options is not restored. REOPENED.

asaveljevs I would propose to move the setting of _res.options lower, to the same place where _res.retrans and _res.retry are set.

wiper RESOLVED in r49800

asaveljevs CLOSED

(5) frontends/php/include/classes/items/CHelpItems.php should be updated.

wiper RESOLVED in r49722

asaveljevs CLOSED.

(6) On Linux, _res.options is of type "u_long":

struct __res_state {
	int	retrans;		/* retransmition time interval */
	int	retry;			/* number of times to retransmit */
	u_long	options;		/* option flags - see below. */
	int	nscount;		/* number of name servers */
	...

We might wish to make "saved_options" variable to be of the same type.

wiper RESOLVED in r49804

asaveljevs CLOSED

Released in:

• pre-2.5.0 r49812