/*
- * charybdis: An advanced ircd.
+ * Solanum: a slightly advanced ircd
* m_list_safelist.c: Version of /list that uses the safelist code.
*
* Copyright (c) 2006 William Pitcock <nenolod@nenolod.net>
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
- *
- * $Id: m_list.c 3372 2007-04-03 10:18:07Z nenolod $
*/
#include "stdinc.h"
#include "inline/stringops.h"
#include "s_assert.h"
#include "logger.h"
+#include "rb_radixtree.h"
+
+static const char list_desc[] = "Provides the LIST command to clients to view non-hidden channels";
+
+static rb_dlink_list safelisting_clients = { NULL, NULL, 0 };
+
+static struct ev_entry *iterate_clients_ev = NULL;
static int _modinit(void);
static void _moddeinit(void);
-static int m_list(struct Client *, struct Client *, int, const char **);
-static int mo_list(struct Client *, struct Client *, int, const char **);
-
-struct ListOptions
-{
- unsigned int users_min, users_max;
- time_t created_min, created_max, topic_min, topic_max;
- int operspy;
-};
+static void m_list(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
+static void mo_list(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void list_one_channel(struct Client *source_p, struct Channel *chptr, int visible);
-static void safelist_one_channel(struct Client *source_p, struct Channel *chptr, struct ListOptions *params);
+static void safelist_one_channel(struct Client *source_p, struct Channel *chptr, struct ListClient *params);
+static void safelist_check_cliexit(hook_data_client_exit * hdata);
+static void safelist_client_instantiate(struct Client *, struct ListClient *);
+static void safelist_client_release(struct Client *);
+static void safelist_iterate_client(struct Client *source_p);
+static void safelist_iterate_clients(void *unused);
static void safelist_channel_named(struct Client *source_p, const char *name, int operspy);
struct Message list_msgtab = {
- "LIST", 0, 0, 0, MFLG_SLOW,
+ "LIST", 0, 0, 0, 0,
{mg_unreg, {m_list, 0}, mg_ignore, mg_ignore, mg_ignore, {mo_list, 0}}
};
mapi_clist_av1 list_clist[] = { &list_msgtab, NULL };
-DECLARE_MODULE_AV1(list, _modinit, _moddeinit, list_clist, NULL, NULL, "$Revision: 3372 $");
+mapi_hfn_list_av1 list_hfnlist[] = {
+ {"client_exit", (hookfn) safelist_check_cliexit},
+ {NULL, NULL}
+};
+
+DECLARE_MODULE_AV2(list, _modinit, _moddeinit, list_clist, NULL, list_hfnlist, NULL, NULL, list_desc);
static int _modinit(void)
{
+ iterate_clients_ev = rb_event_add("safelist_iterate_clients", safelist_iterate_clients, NULL, 3);
+
/* ELIST=[tokens]:
*
* M = mask search
static void _moddeinit(void)
{
+ rb_event_delete(iterate_clients_ev);
+
delete_isupport("SAFELIST");
delete_isupport("ELIST");
}
+static void safelist_check_cliexit(hook_data_client_exit * hdata)
+{
+ /* Cancel the safelist request if we are disconnecting
+ * from the server. That way it doesn't core. :P --nenolod
+ */
+ if (MyClient(hdata->target) && hdata->target->localClient->safelist_data != NULL)
+ {
+ safelist_client_release(hdata->target);
+ }
+}
+
/* m_list()
* parv[1] = channel
*
* XXX - With SAFELIST, do we really need to continue pacing?
* In theory, the server cannot be lagged by this. --nenolod
*/
-static int m_list(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
+static void
+m_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
static time_t last_used = 0L;
+ if (source_p->localClient->safelist_data != NULL)
+ {
+ sendto_one_notice(source_p, ":/LIST aborted");
+ safelist_client_release(source_p);
+ return;
+ }
+
if (parc < 2 || !IsChannelName(parv[1]))
{
/* pace this due to the sheer traffic involved */
{
sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name, "LIST");
sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
- return 0;
+ return;
}
else
last_used = rb_current_time();
}
- return mo_list(client_p, source_p, parc, parv);
+ mo_list(msgbuf_p, client_p, source_p, parc, parv);
}
/* mo_list()
* parv[1] = channel
*/
-static int mo_list(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
+static void
+mo_list(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
- struct ListOptions *params;
+ struct ListClient *params;
char *p;
char *args = NULL;
int i;
int operspy = 0;
- int sendq_limit = get_sendq_hard(client_p);
- rb_dlink_node *ptr;
- sendq_limit /= 10;
- sendq_limit *= 9;
+ if (source_p->localClient->safelist_data != NULL)
+ {
+ sendto_one_notice(source_p, ":/LIST aborted");
+ safelist_client_release(source_p);
+ return;
+ }
if (parc > 1)
{
if (args && IsChannelName(args))
{
safelist_channel_named(source_p, args, operspy);
- return 0;
+ return;
}
/* Multiple channels, possibly with parameters. */
- params = rb_malloc(sizeof(struct ListOptions));
+ params = rb_malloc(sizeof(struct ListClient));
params->users_min = ConfigChannel.displayed_usercount;
params->users_max = INT_MAX;
}
}
- sendto_one(client_p, form_str(RPL_LISTSTART), me.name, client_p->name);
-
- RB_DLINK_FOREACH(ptr, global_channel_list.head)
- {
- safelist_one_channel(client_p, ptr->data, params);
-
- if (rb_linebuf_len(&client_p->localClient->buf_sendq) > sendq_limit)
- {
- sendto_one(source_p, form_str(ERR_TOOMANYMATCHES), me.name, source_p->name, "LIST");
- break;
- }
- }
-
- sendto_one(source_p, form_str(RPL_LISTEND), me.name, source_p->name);
-
- return 0;
+ safelist_client_instantiate(source_p, params);
}
/*
static void list_one_channel(struct Client *source_p, struct Channel *chptr,
int visible)
{
+ char topic[TOPICLEN + 1];
+
+ if (chptr->topic != NULL)
+ rb_strlcpy(topic, chptr->topic, sizeof topic);
+ else
+ topic[0] = '\0';
+ strip_colour(topic);
sendto_one(source_p, form_str(RPL_LIST), me.name, source_p->name,
visible ? "" : "!",
chptr->chname, rb_dlink_list_length(&chptr->members),
- chptr->topic != NULL ? chptr->topic : "");
+ topic);
}
/*
* safelist_sendq_exceeded()
*
* inputs - pointer to client that needs checking
- * outputs - 1 if a client has exceeded the reserved
- * sendq limit, 0 if not
+ * outputs - true if a client has exceeded the reserved
+ * sendq limit, false if not
* side effects - none
*
* When safelisting, we only use half of the SendQ at any
* given time.
*/
-static int safelist_sendq_exceeded(struct Client *client_p)
+static bool safelist_sendq_exceeded(struct Client *client_p)
{
- if (rb_linebuf_len(&client_p->localClient->buf_sendq) > (get_sendq(client_p) / 2))
- return YES;
- else
- return NO;
+ return rb_linebuf_len(&client_p->localClient->buf_sendq) > (get_sendq(client_p) / 2);
+}
+
+/*
+ * safelist_client_instantiate()
+ *
+ * inputs - pointer to Client to be listed,
+ * pointer to ListClient for params
+ * outputs - none
+ * side effects - the safelist process begins for a
+ * client.
+ *
+ * Please do not ever call this on a non-local client.
+ * If you do, you will get SIGSEGV.
+ */
+static void safelist_client_instantiate(struct Client *client_p, struct ListClient *params)
+{
+ s_assert(MyClient(client_p));
+ s_assert(params != NULL);
+
+ client_p->localClient->safelist_data = params;
+
+ sendto_one(client_p, form_str(RPL_LISTSTART), me.name, client_p->name);
+
+ /* pop the client onto the queue for processing */
+ rb_dlinkAddAlloc(client_p, &safelisting_clients);
+
+ /* give the user some initial data to work with */
+ safelist_iterate_client(client_p);
+}
+
+/*
+ * safelist_client_release()
+ *
+ * inputs - pointer to Client being listed on
+ * outputs - none
+ * side effects - the client is no longer being
+ * listed
+ */
+static void safelist_client_release(struct Client *client_p)
+{
+ if(!MyClient(client_p))
+ return;
+
+ s_assert(MyClient(client_p));
+
+ rb_dlinkFindDestroy(client_p, &safelisting_clients);
+
+ rb_free(client_p->localClient->safelist_data->chname);
+ rb_free(client_p->localClient->safelist_data);
+
+ client_p->localClient->safelist_data = NULL;
+
+ sendto_one(client_p, form_str(RPL_LISTEND), me.name, client_p->name);
}
/*
* side effects - a channel is listed if it meets the
* requirements
*/
-static void safelist_one_channel(struct Client *source_p, struct Channel *chptr, struct ListOptions *params)
+static void safelist_one_channel(struct Client *source_p, struct Channel *chptr, struct ListClient *params)
{
int visible;
list_one_channel(source_p, chptr, visible);
}
+
+/*
+ * safelist_iterate_client()
+ *
+ * inputs - client pointer
+ * outputs - none
+ * side effects - the client's sendq is filled up again
+ */
+static void safelist_iterate_client(struct Client *source_p)
+{
+ struct Channel *chptr;
+ rb_radixtree_iteration_state iter;
+
+ RB_RADIXTREE_FOREACH_FROM(chptr, &iter, channel_tree, source_p->localClient->safelist_data->chname)
+ {
+ if (safelist_sendq_exceeded(source_p->from))
+ {
+ rb_free(source_p->localClient->safelist_data->chname);
+ source_p->localClient->safelist_data->chname = rb_strdup(chptr->chname);
+
+ return;
+ }
+
+ safelist_one_channel(source_p, chptr, source_p->localClient->safelist_data);
+ }
+
+ safelist_client_release(source_p);
+}
+
+static void safelist_iterate_clients(void *unused)
+{
+ rb_dlink_node *n, *n2;
+
+ RB_DLINK_FOREACH_SAFE(n, n2, safelisting_clients.head)
+ safelist_iterate_client((struct Client *)n->data);
+}
projects / solanum.git / blobdiff