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target change: Allow free replies.

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When a user receives a private message, notice or RPL_UMODEGMSG,
add the source to a special set of 5 target slots.
These slots are checked in the normal way when sending messages,
allowing a reply without using up a free target.

This feature will not be very useful if a user is being messaged
by many different users; to help this, messages blocked entirely
by +g or +R do not affect the targets. CTCP replies also remain
free in terms of targets.
This commit is contained in:
Jilles Tjoelker 2010-02-15 01:07:07 +01:00
parent 179becdf5f
commit c9f01c4f2f
2 changed files with 50 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
include/client.h
View file

@ -54,6 +54,7 @@ struct Blacklist;
#define IDLEN 10
#define TGCHANGE_NUM 10 /* how many targets we keep track of */
#define TGCHANGE_REPLY 5 /* how many reply targets */
#define TGCHANGE_INITIAL 10 /* initial free targets (normal) */
#define TGCHANGE_INITIAL_LOW 4 /* initial free targets (possible spambot) */
@ -259,7 +260,11 @@ struct LocalUser
struct AuthRequest *auth_request;
/* target change stuff */
uint32_t targets[TGCHANGE_NUM]; /* targets were aware of (fnv32(use_id(target_p))) */
/* targets we're aware of (fnv32(use_id(target_p))):
* 0..TGCHANGE_NUM-1 regular slots
* TGCHANGE_NUM..TGCHANGE_NUM+TGCHANGE_REPLY-1 reply slots
*/
uint32_t targets[TGCHANGE_NUM + TGCHANGE_REPLY];
unsigned int targets_free; /* free targets */
time_t target_last; /* last time we cleared a slot */

46
modules/core/m_message.c
View file

@ -662,6 +662,7 @@ expire_tgchange(void *unused)
}
}
/* checks if source_p is allowed to send to target_p */
static int
add_target(struct Client *source_p, struct Client *target_p)
{
@ -685,7 +686,7 @@ add_target(struct Client *source_p, struct Client *target_p)
targets = source_p->localClient->targets;
/* check for existing target, and move it to the head */
for(i = 0; i < TGCHANGE_NUM; i++)
for(i = 0; i < TGCHANGE_NUM + TGCHANGE_REPLY; i++)
{
if(targets[i] == hashv)
{
@ -733,13 +734,49 @@ add_target(struct Client *source_p, struct Client *target_p)
SetTGChange(source_p);
}
for(i = TGCHANGE_NUM - 1; i > 0; i--)
for(i = TGCHANGE_NUM + TGCHANGE_REPLY - 1; i > 0; i--)
targets[i] = targets[i - 1];
targets[0] = hashv;
source_p->localClient->targets_free--;
return 1;
}
/* allows source_p to send to target_p */
static void
add_reply_target(struct Client *source_p, struct Client *target_p)
{
int i, j;
uint32_t hashv;
uint32_t *targets;
/* can msg themselves or services without using any target slots */
if(source_p == target_p || IsService(target_p))
return;
hashv = fnv_hash_upper((const unsigned char *)use_id(target_p), 32);
targets = source_p->localClient->targets;
/* check for existing target, and move it to the first reply slot
* if it is in a reply slot
*/
for(i = 0; i < TGCHANGE_NUM + TGCHANGE_REPLY; i++)
{
if(targets[i] == hashv)
{
if(i > TGCHANGE_NUM)
{
for(j = i; j > TGCHANGE_NUM; j--)
targets[j] = targets[j - 1];
targets[TGCHANGE_NUM] = hashv;
}
return;
}
}
for(i = TGCHANGE_NUM + TGCHANGE_REPLY - 1; i > TGCHANGE_NUM; i--)
targets[i] = targets[i - 1];
targets[TGCHANGE_NUM] = hashv;
}
/*
* msg_client
*
@ -813,6 +850,7 @@ msg_client(int p_or_n, const char *command,
/* Here is the anti-flood bot/spambot code -db */
if(accept_message(source_p, target_p) || IsOper(source_p))
{
add_reply_target(target_p, source_p);
sendto_one(target_p, ":%s!%s@%s %s %s :%s",
source_p->name,
source_p->username,
@ -843,6 +881,7 @@ msg_client(int p_or_n, const char *command,
form_str(RPL_TARGNOTIFY),
target_p->name);
add_reply_target(target_p, source_p);
sendto_one(target_p, form_str(RPL_UMODEGMSG),
me.name, target_p->name, source_p->name,
source_p->username, source_p->host);
@ -852,7 +891,10 @@ msg_client(int p_or_n, const char *command,
}
}
else
{
add_reply_target(target_p, source_p);
sendto_anywhere(target_p, source_p, command, ":%s", text);
}
}
else
sendto_anywhere(target_p, source_p, command, ":%s", text);