ermyth/src/servers.C

/*
 * servers.C: Server and network state tracking.
 * Rights to this code are documented in doc/pod/license.pod.
 *
 * Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
 */

static char const rcsid[] = "$Id: servers.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";

#include "atheme.h"
#include <account/myuser.h>

typedef std::pair<char const * const, server_t *> server_pair;
typedef std::map<char const * const, server_t *, irccase_lt> server_map;
server_map sidlist;
server_map servlist;
list_t tldlist;
server_t::callbacks server_t::callback;

/*
 * init_servers()
 *
 * Initializes the server heap and server/sid DTree structures.
 *
 * Inputs:
 *     - nothing
 *
 * Outputs:
 *     - nothing
 *
 * Side Effects:
 *     - if the heap or dtrees fail to initialize, the program
 *       will abort.
 */
void
init_servers (void)
{
#if 0
  serv_heap = BlockHeapCreate (sizeof (server_t), HEAP_SERVER);
  tld_heap = BlockHeapCreate (sizeof (tld_t), 4);
#endif
}

/*
 * server_add(char const * const name, unsigned int hops, char const * const uplink,
 *            char const * const id, char const * const desc)
 *
 * Server object factory.
 *
 * Inputs:
 *     - name of server object to create
 *     - amount of hops server has from services
 *     - name of server's uplink or NULL if it's us
 *     - SID of uplink if applicable otherwise NULL
 *     - server's description
 *
 * Outputs:
 *     - on success, a new server object
 *
 * Side Effects:
 *     - the new server object is added to the server and sid DTree.
 */
server_t *
server_add (char const * const name, unsigned int hops, char const * const uplink, char const * const id, char const * const description)
{
  server_t *s, *u = NULL;
  char const *tld;
  char const *desc = description;

  if (uplink)
    {
      if (id != NULL)
        slog (LG_NETWORK, "server_add(): %s (%s), uplink %s", name, id, uplink);
      else
        slog (LG_NETWORK, "server_add(): %s, uplink %s", name, uplink);
      u = server_find (uplink);
    }
  else
    slog (LG_DEBUG, "server_add(): %s, root", name);

  s = new server_t;

  if (id != NULL)
    {
      s->sid = sstrdup (id);
      sidlist[s->sid] = s;
    }

  /* check to see if it's hidden */
  if (!strncmp (desc, "(H)", 3))
    {
      s->flags |= SF_HIDE;
      desc += 3;
      if (*desc == ' ')
        desc++;
    }

  s->name = sstrdup (name);
  s->desc = sstrdup (desc);
  s->hops = hops;
  s->connected_since = NOW;

  servlist[s->name] = s;

  if (u)
    {
      s->uplink = u;
      node_add (s, node_create (), &u->children);
    }

  /* tld list for global noticer */
  tld = strrchr (name, '.');

  if (tld != NULL)
    {
      if (!tld_find (tld))
        tld_add (tld);
    }

  cnt.server++;

  return s;
}

/*
 * server_delete(char const * const name)
 *
 * Finds and recursively destroys a server object.
 *
 * Inputs:
 *     - name of server to find and destroy
 *
 * Outputs:
 *     - nothing
 *
 * Side Effects:
 *     - all users and servers attached to the target are recursively deleted
 */
void
server_delete (char const * const name)
{
  server_t *s = server_find (name);
  server_t *child;
  user_t *u;
  node_t *n, *tn;

  if (!s)
    {
      slog (LG_DEBUG, "server_delete(): called for nonexistant server: %s", name);

      return;
    }
  if (s == me.me)
    {
      /* Deleting this would cause confusion, so let's not do it.
       * Some ircds send SQUIT <myname> when we are squitted.
       * -- jilles
       */
      slog (LG_DEBUG, "server_delete(): tried to delete myself");
      return;
    }

  slog (me.connected ? LG_NETWORK : LG_DEBUG, "server_delete(): %s, uplink %s (%d users)", s->name, s->uplink != NULL ? s->uplink->name : "<none>", s->users);

  /* first go through it's users and kill all of them */
  LIST_FOREACH_SAFE (n, tn, s->userlist.head)
  {
    u = (user_t *) n->data;
    /* This user split, allow bursted logins for the account.
     * XXX should we do this here?
     * -- jilles */
    if (u->myuser != NULL)
      u->myuser->flags &= ~MU_NOBURSTLOGIN;
    user_delete (u);
  }

  LIST_FOREACH_SAFE (n, tn, s->children.head)
  {
    child = static_cast<server_t *> (n->data);
    server_delete (child->name);
  }

  /* now remove the server */
  servlist.erase (s->name);

  if (s->sid)
    sidlist.erase (s->sid);

  if (s->uplink)
    {
      n = node_find (s, &s->uplink->children);
      node_del (n, &s->uplink->children);
      node_free (n);
    }

  /* If unconnect semantics SQUIT was confirmed, introduce the jupe
   * now. This must be after removing the server from the dtrees.
   * -- jilles */
  if (s->flags & SF_JUPE_PENDING)
    phandler->jupe (s->name, "Juped");

  sfree (s->name);
  sfree (s->desc);
  if (s->sid)
    sfree (s->sid);

  delete s;

  cnt.server--;
}

/*
 * server_find(char const * const name)
 *
 * Finds a server object.
 *
 * Inputs:
 *     - name of server to find
 *
 * Outputs:
 *     - on success, the server object
 *     - on failure, NULL.
 *
 * Side Effects:
 *     - none
 */
server_t *
server_find (char const * const name)
{
  server_map::iterator it;

  if (ircd->uses_uid)
    {
      it = sidlist.find (name);
      if (it != sidlist.end ())
        return it->second;
    }

  return ((it = servlist.find (name)) == servlist.end ()
          ? NULL
          : it->second);
}

/*
 * tld_add(char const * const name)
 *
 * TLD object factory.
 *
 * Inputs:
 *     - name of TLD to cache as an object
 *
 * Outputs:
 *     - on success, a TLD object
 *     - on failure, NULL
 *
 * Side Effects:
 *     - the TLD object is registered with the TLD list.
 */
tld_t *
tld_add (char const * const name)
{
  tld_t *tld;
  node_t *n = node_create ();

  slog (LG_DEBUG, "tld_add(): %s", name);

  tld = new tld_t;

  node_add (tld, n, &tldlist);

  tld->name = sstrdup (name);

  cnt.tld++;

  return tld;
}

/*
 * tld_delete(char const * const name)
 *
 * Destroys a TLD object.
 *
 * Inputs:
 *     - name of TLD object to destroy
 *
 * Outputs:
 *     - nothing
 *
 * Side Effects:
 *     - the TLD object is removed and deregistered from the TLD list.
 */
void
tld_delete (char const * const name)
{
  tld_t *tld = tld_find (name);
  node_t *n;

  if (!tld)
    {
      slog (LG_DEBUG, "tld_delete(): called for nonexistant tld: %s", name);

      return;
    }

  slog (LG_DEBUG, "tld_delete(): %s", tld->name);

  n = node_find (tld, &tldlist);
  node_del (n, &tldlist);
  node_free (n);

  sfree (tld->name);
  delete tld;

  cnt.tld--;
}

/*
 * tld_find(char const * const name)
 *
 * Looks up a TLD object.
 *
 * Inputs:
 *     - name of TLD object to look up
 *
 * Outputs:
 *     - on success, the TLD object
 *     - on failure, NULL
 *
 * Side Effects:
 *     - none
 */
tld_t *
tld_find (char const * const name)
{
  tld_t *tld;
  node_t *n;

  if (name == NULL)
    return NULL;

  LIST_FOREACH (n, tldlist.head)
  {
    tld = (tld_t *) n->data;

    if (!strcasecmp (name, tld->name))
      return tld;
  }

  return NULL;
}

/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs
 * vim:ts=8
 * vim:sw=8
 * vim:noexpandtab
 */
Revision:	1.4
Committed:	Tue Aug 28 17:08:12 2007 UTC (16 years, 9 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+44 -48 lines
Log Message:	- changed name - updated the example config to the new system - added more documentation - enhanced documentation generators - added a link to the pdf to the website - added an RSS feed generator - transitioned hooks to c++ callbacks - did various merges with upstream along the way - added const where appropriate - removed the old block allocator - fixed most memory leaks - transitioned some dictionaries to std::map - transitioned some lists to std::vector - made some free functions members where appropriate - renamed string to dynstr and added a static string ststr - use NOW instead of time (NULL) if possible - completely reworked database backends, crypto handlers and protocol handlers to use an object factory - removed the old module system. ermyth does not do any dynamic loading anymore - fixed most of the build system - reworked how protocol commands work
#	Content
1	/*
2	* servers.C: Server and network state tracking.
3	* Rights to this code are documented in doc/pod/license.pod.
4	*
5	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
6	*/
7
8	static char const rcsid[] = "$Id: servers.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";
9
10	#include "atheme.h"
11	#include <account/myuser.h>
12
13	typedef std::pair<char const * const, server_t *> server_pair;
14	typedef std::map<char const * const, server_t *, irccase_lt> server_map;
15	server_map sidlist;
16	server_map servlist;
17	list_t tldlist;
18	server_t::callbacks server_t::callback;
19
20	/*
21	* init_servers()
22	*
23	* Initializes the server heap and server/sid DTree structures.
24	*
25	* Inputs:
26	* - nothing
27	*
28	* Outputs:
29	* - nothing
30	*
31	* Side Effects:
32	* - if the heap or dtrees fail to initialize, the program
33	* will abort.
34	*/
35	void
36	init_servers (void)
37	{
38	#if 0
39	serv_heap = BlockHeapCreate (sizeof (server_t), HEAP_SERVER);
40	tld_heap = BlockHeapCreate (sizeof (tld_t), 4);
41	#endif
42	}
43
44	/*
45	* server_add(char const * const name, unsigned int hops, char const * const uplink,
46	* char const * const id, char const * const desc)
47	*
48	* Server object factory.
49	*
50	* Inputs:
51	* - name of server object to create
52	* - amount of hops server has from services
53	* - name of server's uplink or NULL if it's us
54	* - SID of uplink if applicable otherwise NULL
55	* - server's description
56	*
57	* Outputs:
58	* - on success, a new server object
59	*
60	* Side Effects:
61	* - the new server object is added to the server and sid DTree.
62	*/
63	server_t *
64	server_add (char const * const name, unsigned int hops, char const * const uplink, char const * const id, char const * const description)
65	{
66	server_t s, u = NULL;
67	char const *tld;
68	char const *desc = description;
69
70	if (uplink)
71	{
72	if (id != NULL)
73	slog (LG_NETWORK, "server_add(): %s (%s), uplink %s", name, id, uplink);
74	else
75	slog (LG_NETWORK, "server_add(): %s, uplink %s", name, uplink);
76	u = server_find (uplink);
77	}
78	else
79	slog (LG_DEBUG, "server_add(): %s, root", name);
80
81	s = new server_t;
82
83	if (id != NULL)
84	{
85	s->sid = sstrdup (id);
86	sidlist[s->sid] = s;
87	}
88
89	/* check to see if it's hidden */
90	if (!strncmp (desc, "(H)", 3))
91	{
92	s->flags \|= SF_HIDE;
93	desc += 3;
94	if (*desc == ' ')
95	desc++;
96	}
97
98	s->name = sstrdup (name);
99	s->desc = sstrdup (desc);
100	s->hops = hops;
101	s->connected_since = NOW;
102
103	servlist[s->name] = s;
104
105	if (u)
106	{
107	s->uplink = u;
108	node_add (s, node_create (), &u->children);
109	}
110
111	/* tld list for global noticer */
112	tld = strrchr (name, '.');
113
114	if (tld != NULL)
115	{
116	if (!tld_find (tld))
117	tld_add (tld);
118	}
119
120	cnt.server++;
121
122	return s;
123	}
124
125	/*
126	* server_delete(char const * const name)
127	*
128	* Finds and recursively destroys a server object.
129	*
130	* Inputs:
131	* - name of server to find and destroy
132	*
133	* Outputs:
134	* - nothing
135	*
136	* Side Effects:
137	* - all users and servers attached to the target are recursively deleted
138	*/
139	void
140	server_delete (char const * const name)
141	{
142	server_t *s = server_find (name);
143	server_t *child;
144	user_t *u;
145	node_t n, tn;
146
147	if (!s)
148	{
149	slog (LG_DEBUG, "server_delete(): called for nonexistant server: %s", name);
150
151	return;
152	}
153	if (s == me.me)
154	{
155	/* Deleting this would cause confusion, so let's not do it.
156	* Some ircds send SQUIT <myname> when we are squitted.
157	* -- jilles
158	*/
159	slog (LG_DEBUG, "server_delete(): tried to delete myself");
160	return;
161	}
162
163	slog (me.connected ? LG_NETWORK : LG_DEBUG, "server_delete(): %s, uplink %s (%d users)", s->name, s->uplink != NULL ? s->uplink->name : "<none>", s->users);
164
165	/* first go through it's users and kill all of them */
166	LIST_FOREACH_SAFE (n, tn, s->userlist.head)
167	{
168	u = (user_t *) n->data;
169	/* This user split, allow bursted logins for the account.
170	* XXX should we do this here?
171	* -- jilles */
172	if (u->myuser != NULL)
173	u->myuser->flags &= ~MU_NOBURSTLOGIN;
174	user_delete (u);
175	}
176
177	LIST_FOREACH_SAFE (n, tn, s->children.head)
178	{
179	child = static_cast<server_t *> (n->data);
180	server_delete (child->name);
181	}
182
183	/* now remove the server */
184	servlist.erase (s->name);
185
186	if (s->sid)
187	sidlist.erase (s->sid);
188
189	if (s->uplink)
190	{
191	n = node_find (s, &s->uplink->children);
192	node_del (n, &s->uplink->children);
193	node_free (n);
194	}
195
196	/* If unconnect semantics SQUIT was confirmed, introduce the jupe
197	* now. This must be after removing the server from the dtrees.
198	* -- jilles */
199	if (s->flags & SF_JUPE_PENDING)
200	phandler->jupe (s->name, "Juped");
201
202	sfree (s->name);
203	sfree (s->desc);
204	if (s->sid)
205	sfree (s->sid);
206
207	delete s;
208
209	cnt.server--;
210	}
211
212	/*
213	* server_find(char const * const name)
214	*
215	* Finds a server object.
216	*
217	* Inputs:
218	* - name of server to find
219	*
220	* Outputs:
221	* - on success, the server object
222	* - on failure, NULL.
223	*
224	* Side Effects:
225	* - none
226	*/
227	server_t *
228	server_find (char const * const name)
229	{
230	server_map::iterator it;
231
232	if (ircd->uses_uid)
233	{
234	it = sidlist.find (name);
235	if (it != sidlist.end ())
236	return it->second;
237	}
238
239	return ((it = servlist.find (name)) == servlist.end ()
240	? NULL
241	: it->second);
242	}
243
244	/*
245	* tld_add(char const * const name)
246	*
247	* TLD object factory.
248	*
249	* Inputs:
250	* - name of TLD to cache as an object
251	*
252	* Outputs:
253	* - on success, a TLD object
254	* - on failure, NULL
255	*
256	* Side Effects:
257	* - the TLD object is registered with the TLD list.
258	*/
259	tld_t *
260	tld_add (char const * const name)
261	{
262	tld_t *tld;
263	node_t *n = node_create ();
264
265	slog (LG_DEBUG, "tld_add(): %s", name);
266
267	tld = new tld_t;
268
269	node_add (tld, n, &tldlist);
270
271	tld->name = sstrdup (name);
272
273	cnt.tld++;
274
275	return tld;
276	}
277
278	/*
279	* tld_delete(char const * const name)
280	*
281	* Destroys a TLD object.
282	*
283	* Inputs:
284	* - name of TLD object to destroy
285	*
286	* Outputs:
287	* - nothing
288	*
289	* Side Effects:
290	* - the TLD object is removed and deregistered from the TLD list.
291	*/
292	void
293	tld_delete (char const * const name)
294	{
295	tld_t *tld = tld_find (name);
296	node_t *n;
297
298	if (!tld)
299	{
300	slog (LG_DEBUG, "tld_delete(): called for nonexistant tld: %s", name);
301
302	return;
303	}
304
305	slog (LG_DEBUG, "tld_delete(): %s", tld->name);
306
307	n = node_find (tld, &tldlist);
308	node_del (n, &tldlist);
309	node_free (n);
310
311	sfree (tld->name);
312	delete tld;
313
314	cnt.tld--;
315	}
316
317	/*
318	* tld_find(char const * const name)
319	*
320	* Looks up a TLD object.
321	*
322	* Inputs:
323	* - name of TLD object to look up
324	*
325	* Outputs:
326	* - on success, the TLD object
327	* - on failure, NULL
328	*
329	* Side Effects:
330	* - none
331	*/
332	tld_t *
333	tld_find (char const * const name)
334	{
335	tld_t *tld;
336	node_t *n;
337
338	if (name == NULL)
339	return NULL;
340
341	LIST_FOREACH (n, tldlist.head)
342	{
343	tld = (tld_t *) n->data;
344
345	if (!strcasecmp (name, tld->name))
346	return tld;
347	}
348
349	return NULL;
350	}
351
352	/* vim:cinoptions=>s,e0,n0,f0,{0,}0,^0,=s,ps,t0,c3,+s,(2s,us,)20,*30,gs,hs
353	* vim:ts=8
354	* vim:sw=8
355	* vim:noexpandtab
356	*/