Pace aways.

This becomes important because of away-notify sending aways to common
channels much like nick changes (which are also paced).

Marking as unaway is not limited (but obviously only does something if the
user was away before). To allow users to fix typos in away messages, two
aways are allowed in sequence if away has not been used recently.

doc/example.conf

@@ -515,6 +515,7 @@ general {
 	throttle_duration = 60;
 	throttle_count = 4;
 	max_ratelimit_tokens = 30;
+	away_interval = 30;
 };
 
 modules {

doc/reference.conf

@@ -1271,6 +1271,12 @@ general {
 	 * you're doing.
 	 */
 	max_ratelimit_tokens = 30;
+
+	/* away_interval: the minimum interval between AWAY commands. One
+	 * additional AWAY command is allowed, and only marking as away
+	 * counts.
+	 */
+	away_interval = 30;
 };
 
 modules {

include/client.h

@@ -237,7 +237,7 @@ struct LocalUser
 
 	struct DNSQuery *dnsquery; /* for outgoing server's name lookup */
 
-	time_t last_away;	/* Away since... */
+	time_t next_away;	/* Don't allow next away before... */
 	time_t last;
 
 	/* clients allowed to talk through +g */

include/s_conf.h

@@ -225,6 +225,7 @@ struct config_file_entry
 	int operspy_dont_care_user_info;
 	int use_propagated_bans;
 	int max_ratelimit_tokens;
+	int away_interval;
 
 	int client_flood_max_lines;
 	int client_flood_burst_rate;

modules/m_away.c

@@ -37,7 +37,6 @@
 #include "s_serv.h"
 #include "packet.h"
 
-
 static int m_away(struct Client *, struct Client *, int, const char **);
 
 struct Message away_msgtab = {
@@ -93,6 +92,21 @@ m_away(struct Client *client_p, struct Client *source_p, int parc, const char *p
 		return 0;
 	}
 
+	/* Rate limit this because it is sent to common channels. */
+	if(!IsOper(source_p) &&
+			source_p->localClient->next_away > rb_current_time())
+	{
+		sendto_one(source_p, form_str(RPL_LOAD2HI),
+				me.name, source_p->name, "AWAY");
+		return;
+	}
+	if(source_p->localClient->next_away < rb_current_time() -
+			ConfigFileEntry.away_interval)
+		source_p->localClient->next_away = rb_current_time();
+	else
+		source_p->localClient->next_away = rb_current_time() +
+			ConfigFileEntry.away_interval;
+
 	if(source_p->user->away == NULL)
 		allocate_away(source_p);
 	if(strncmp(source_p->user->away, parv[1], AWAYLEN - 1))

modules/m_info.c

@@ -524,6 +524,12 @@ static struct InfoStruct info_table[] = {
 		&ConfigFileEntry.max_ratelimit_tokens,
 		"The maximum number of tokens that can be accumulated for executing rate-limited commands",
 	},
+	{
+		"away_interval",
+		OUTPUT_DECIMAL,
+		&ConfigFileEntry.away_interval,
+		"The minimum time between aways",
+	},
 	{
 		"default_split_server_count",
 		OUTPUT_DECIMAL,

src/newconf.c

@@ -2278,6 +2278,7 @@ static struct ConfEntry conf_general_table[] =
 	{ "client_flood_message_num",	CF_INT,   NULL, 0, &ConfigFileEntry.client_flood_message_num	},
 	{ "client_flood_message_time",	CF_INT,   NULL, 0, &ConfigFileEntry.client_flood_message_time	},
 	{ "max_ratelimit_tokens",	CF_INT,   NULL, 0, &ConfigFileEntry.max_ratelimit_tokens	},
+	{ "away_interval",		CF_INT,   NULL, 0, &ConfigFileEntry.away_interval		},
 	{ "\0", 		0, 	  NULL, 0, NULL }
 };
 

src/s_conf.c

@@ -746,6 +746,7 @@ set_default_conf(void)
 	ConfigFileEntry.operspy_dont_care_user_info = NO;
 	ConfigFileEntry.use_propagated_bans = YES;
 	ConfigFileEntry.max_ratelimit_tokens = 30;
+	ConfigFileEntry.away_interval = 30;
 
 #ifdef HAVE_LIBZ
 	ConfigFileEntry.compression_level = 4;