ermyth/src/uplink.C

/*
 * uplink.C: Uplink management.
 *
 * Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
 * Rights to this code are as documented in COPYING.
 *
 *
 * Portions of this file were derived from sources bearing the following license:
 * 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: uplink.C,v 1.7 2007-09-09 20:05:53 pippijn Exp $";

#include <boost/foreach.hpp>

#include "atheme.h"
#include "servers.h"
#include "datastream.h"
#include "uplink.h"
#include "connection.h"

list_t uplinks;
uplink_t *curr_uplink;

static void uplink_close (connection_t *cptr);

void
init_uplinks (void)
{
#if 0
  uplink_heap = BlockHeapCreate (sizeof (uplink_t), 4);
#endif
}

uplink_t *
uplink_add (char *name, char *host, char *password, char *vhost, int port)
{
  uplink_t *u;
  node_t *n;

  slog (LG_DEBUG, "uplink_add(): %s -> %s:%d", me.name, name, port);

  if ((u = uplink_find (name)))
    {
      if (u->flags & UPF_ILLEGAL)
        {
          u->flags &= ~UPF_ILLEGAL;
          sfree (u->name);
          sfree (u->host);
          sfree (u->pass);
          sfree (u->vhost);
        }
      else
        {
          slog (LG_INFO, "Duplicate uplink %s.", name);
          return NULL;
        }
    }
  else
    {
      u = new uplink_t;
      n = node_create ();
      u->node = n;
      node_add (u, n, &uplinks);
      cnt.uplink++;
    }

  u->name = sstrdup (name);
  u->host = sstrdup (host);
  u->pass = sstrdup (password);
  if (vhost)
    u->vhost = sstrdup (vhost);
  else
    u->vhost = sstrdup ("0.0.0.0");
  u->port = port;

  return u;
}

void
uplink_delete (uplink_t *u)
{
  node_t *n = node_find (u, &uplinks);

  sfree (u->name);
  sfree (u->host);
  sfree (u->pass);
  sfree (u->vhost);

  node_del (n, &uplinks);
  node_free (n);

  delete u;
  cnt.uplink--;
}

uplink_t *
uplink_find (char *name)
{
  node_t *n;

  LIST_FOREACH (n, uplinks.head)
  {
    uplink_t *u = static_cast<uplink_t *> (n->data);

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

  return NULL;
}

void
uplink_connect (void)
{
  uplink_t *u;

  if (curr_uplink == NULL)
    {
      if (uplinks.head == NULL)
        {
          slog (LG_ERROR, "uplink_connect(): no uplinks configured, exiting. Make sure to have at least one uplink{} block in your configuration file.");
          exit (EXIT_FAILURE);
        }
      curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
      slog (LG_INFO, "uplink_connect(): connecting to first entry %s[%s]:%d.", curr_uplink->name, curr_uplink->host, curr_uplink->port);
    }
  else if (curr_uplink->node->next)
    {
      u = static_cast<uplink_t *> (curr_uplink->node->next->data);

      curr_uplink = u;
      slog (LG_INFO, "uplink_connect(): trying alternate uplink %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
    }
  else
    {
      curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
      slog (LG_INFO, "uplink_connect(): trying again first entry %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
    }

  u = curr_uplink;

  curr_uplink->conn = connection_t::open_tcp (u->host, u->vhost, u->port, recvq_put, sendq_flush);
  if (curr_uplink->conn != NULL)
    curr_uplink->conn->close_handler = uplink_close;
  else
    event_add_once ("reconn", reconn, NULL, me.recontime);
}

/*
 * uplink_close()
 * 
 * inputs:
 *       connection pointer of current uplink
 *       triggered by callback close_handler
 *
 * outputs:
 *       none
 *
 * side effects:
 *       reconnection is scheduled
 *       uplink marked dead
 *       uplink deleted if it had been removed from configuration
 */
static void
uplink_close (connection_t *cptr)
{
  event_add_once ("reconn", reconn, NULL, me.recontime);

  me.connected = false;

  if (curr_uplink->flags & UPF_ILLEGAL)
    {
      slog (LG_INFO, "uplink_close(): %s was removed from configuration, deleting", curr_uplink->name);
      uplink_delete (curr_uplink);
      if (uplinks.head == NULL)
        {
          slog (LG_ERROR, "uplink_close(): last uplink deleted, exiting.");
          exit (EXIT_FAILURE);
        }
      curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
    }
  curr_uplink->conn = NULL;

  slog (LG_DEBUG, "uplink_close(): ----------------------- clearing -----------------------");

  /* we have to kill everything.
   * we do not clear users here because when you delete a server,
   * it deletes its users
   */
  if (me.actual != NULL)
    server_delete (me.actual);
  me.actual = NULL;
  /* remove all the channels left */
  foreach (channel_pair &cp, chanlist)
    channel_delete (cp.second);
  /* this leaves me.me and all users on it (i.e. services) */

  slog (LG_DEBUG, "uplink_close(): ------------------------- done -------------------------");
}
Revision:	1.8
Committed:	Sun Sep 16 18:54:45 2007 UTC (16 years, 8 months ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+7 -2 lines
Log Message:	#defines to enum
#	User	Rev	Content
1	pippijn	1.1	/*
2			* uplink.C: Uplink management.
3	pippijn	1.8	*
4			* Copyright © 2007 Pippijn van Steenhoven / The Ermyth Team
5			* Rights to this code are as documented in COPYING.
6			*
7			*
8			* Portions of this file were derived from sources bearing the following license:
9	pippijn	1.2	* Rights to this code are documented in doc/pod/license.pod.
10	pippijn	1.4	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
11	pippijn	1.1	*/
12
13	pippijn	1.8	static char const rcsid[] = "$Id: uplink.C,v 1.7 2007-09-09 20:05:53 pippijn Exp $";
14	pippijn	1.5
15			#include <boost/foreach.hpp>
16	pippijn	1.1
17			#include "atheme.h"
18	pippijn	1.7	#include "servers.h"
19	pippijn	1.1	#include "datastream.h"
20			#include "uplink.h"
21	pippijn	1.6	#include "connection.h"
22	pippijn	1.1
23			list_t uplinks;
24			uplink_t *curr_uplink;
25
26			static void uplink_close (connection_t *cptr);
27
28			void
29			init_uplinks (void)
30			{
31	pippijn	1.4	#if 0
32	pippijn	1.1	uplink_heap = BlockHeapCreate (sizeof (uplink_t), 4);
33	pippijn	1.4	#endif
34	pippijn	1.1	}
35
36			uplink_t *
37			uplink_add (char name, char host, char password, char vhost, int port)
38			{
39			uplink_t *u;
40			node_t *n;
41
42			slog (LG_DEBUG, "uplink_add(): %s -> %s:%d", me.name, name, port);
43
44			if ((u = uplink_find (name)))
45			{
46			if (u->flags & UPF_ILLEGAL)
47			{
48			u->flags &= ~UPF_ILLEGAL;
49	pippijn	1.4	sfree (u->name);
50			sfree (u->host);
51			sfree (u->pass);
52			sfree (u->vhost);
53	pippijn	1.1	}
54			else
55			{
56			slog (LG_INFO, "Duplicate uplink %s.", name);
57			return NULL;
58			}
59			}
60			else
61			{
62	pippijn	1.4	u = new uplink_t;
63	pippijn	1.1	n = node_create ();
64			u->node = n;
65			node_add (u, n, &uplinks);
66			cnt.uplink++;
67			}
68
69			u->name = sstrdup (name);
70			u->host = sstrdup (host);
71			u->pass = sstrdup (password);
72			if (vhost)
73			u->vhost = sstrdup (vhost);
74			else
75			u->vhost = sstrdup ("0.0.0.0");
76			u->port = port;
77
78			return u;
79			}
80
81			void
82			uplink_delete (uplink_t *u)
83			{
84			node_t *n = node_find (u, &uplinks);
85
86	pippijn	1.4	sfree (u->name);
87			sfree (u->host);
88			sfree (u->pass);
89			sfree (u->vhost);
90	pippijn	1.1
91			node_del (n, &uplinks);
92			node_free (n);
93
94	pippijn	1.4	delete u;
95	pippijn	1.1	cnt.uplink--;
96			}
97
98			uplink_t *
99			uplink_find (char *name)
100			{
101			node_t *n;
102
103			LIST_FOREACH (n, uplinks.head)
104			{
105			uplink_t u = static_cast<uplink_t > (n->data);
106
107			if (!strcasecmp (u->name, name))
108			return u;
109			}
110
111			return NULL;
112			}
113
114			void
115			uplink_connect (void)
116			{
117			uplink_t *u;
118
119			if (curr_uplink == NULL)
120			{
121			if (uplinks.head == NULL)
122			{
123			slog (LG_ERROR, "uplink_connect(): no uplinks configured, exiting. Make sure to have at least one uplink{} block in your configuration file.");
124			exit (EXIT_FAILURE);
125			}
126			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
127			slog (LG_INFO, "uplink_connect(): connecting to first entry %s[%s]:%d.", curr_uplink->name, curr_uplink->host, curr_uplink->port);
128			}
129			else if (curr_uplink->node->next)
130			{
131			u = static_cast<uplink_t *> (curr_uplink->node->next->data);
132
133			curr_uplink = u;
134			slog (LG_INFO, "uplink_connect(): trying alternate uplink %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
135			}
136			else
137			{
138			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
139			slog (LG_INFO, "uplink_connect(): trying again first entry %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
140			}
141
142			u = curr_uplink;
143
144	pippijn	1.6	curr_uplink->conn = connection_t::open_tcp (u->host, u->vhost, u->port, recvq_put, sendq_flush);
145	pippijn	1.1	if (curr_uplink->conn != NULL)
146			curr_uplink->conn->close_handler = uplink_close;
147			else
148			event_add_once ("reconn", reconn, NULL, me.recontime);
149			}
150
151			/*
152			* uplink_close()
153			*
154			* inputs:
155			* connection pointer of current uplink
156			* triggered by callback close_handler
157			*
158			* outputs:
159			* none
160			*
161			* side effects:
162			* reconnection is scheduled
163			* uplink marked dead
164			* uplink deleted if it had been removed from configuration
165			*/
166			static void
167			uplink_close (connection_t *cptr)
168			{
169			event_add_once ("reconn", reconn, NULL, me.recontime);
170
171			me.connected = false;
172
173			if (curr_uplink->flags & UPF_ILLEGAL)
174			{
175			slog (LG_INFO, "uplink_close(): %s was removed from configuration, deleting", curr_uplink->name);
176			uplink_delete (curr_uplink);
177			if (uplinks.head == NULL)
178			{
179			slog (LG_ERROR, "uplink_close(): last uplink deleted, exiting.");
180			exit (EXIT_FAILURE);
181			}
182			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
183			}
184			curr_uplink->conn = NULL;
185
186			slog (LG_DEBUG, "uplink_close(): ----------------------- clearing -----------------------");
187
188			/* we have to kill everything.
189			* we do not clear users here because when you delete a server,
190			* it deletes its users
191			*/
192			if (me.actual != NULL)
193			server_delete (me.actual);
194			me.actual = NULL;
195			/* remove all the channels left */
196	pippijn	1.5	foreach (channel_pair &cp, chanlist)
197			channel_delete (cp.second);
198	pippijn	1.1	/* this leaves me.me and all users on it (i.e. services) */
199
200			slog (LG_DEBUG, "uplink_close(): ------------------------- done -------------------------");
201			}