ermyth/src/uplink.C

/*
 * uplink.C: Uplink management.
 * 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 1.6 2007-08-30 19:56:26 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:	1.7
Committed:	Sun Sep 9 20:05:53 2007 UTC (19 years, 1 month ago) by pippijn
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+2 -1 lines
Log Message:	- changed configurations to the c++ stdlib - more #defines to enum - removed getopt.h and link.h from the system as they were unused - reworked logstreams - added an itoa with old syntax - made klines objects - moved some global variables into appropriate classes - fixed boost.foreach's compiler workaround #if's - allow other files to add exceptions with ADD_EXCEPTION - changed mynick_t to c++ object - moved servers.h out of atheme.h - corrected PING from inspircd 1.2
#	User	Rev	Content
1	pippijn	1.1	/*
2			* uplink.C: Uplink management.
3	pippijn	1.2	* Rights to this code are documented in doc/pod/license.pod.
4	pippijn	1.1	*
5	pippijn	1.4	* Copyright © 2005-2007 Atheme Project (http://www.atheme.org)
6	pippijn	1.1	*/
7
8	pippijn	1.7	static char const rcsid[] = "$Id: uplink.C,v 1.6 2007-08-30 19:56:26 pippijn Exp $";
9	pippijn	1.5
10			#include <boost/foreach.hpp>
11	pippijn	1.1
12			#include "atheme.h"
13	pippijn	1.7	#include "servers.h"
14	pippijn	1.1	#include "datastream.h"
15			#include "uplink.h"
16	pippijn	1.6	#include "connection.h"
17	pippijn	1.1
18			list_t uplinks;
19			uplink_t *curr_uplink;
20
21			static void uplink_close (connection_t *cptr);
22
23			void
24			init_uplinks (void)
25			{
26	pippijn	1.4	#if 0
27	pippijn	1.1	uplink_heap = BlockHeapCreate (sizeof (uplink_t), 4);
28	pippijn	1.4	#endif
29	pippijn	1.1	}
30
31			uplink_t *
32			uplink_add (char name, char host, char password, char vhost, int port)
33			{
34			uplink_t *u;
35			node_t *n;
36
37			slog (LG_DEBUG, "uplink_add(): %s -> %s:%d", me.name, name, port);
38
39			if ((u = uplink_find (name)))
40			{
41			if (u->flags & UPF_ILLEGAL)
42			{
43			u->flags &= ~UPF_ILLEGAL;
44	pippijn	1.4	sfree (u->name);
45			sfree (u->host);
46			sfree (u->pass);
47			sfree (u->vhost);
48	pippijn	1.1	}
49			else
50			{
51			slog (LG_INFO, "Duplicate uplink %s.", name);
52			return NULL;
53			}
54			}
55			else
56			{
57	pippijn	1.4	u = new uplink_t;
58	pippijn	1.1	n = node_create ();
59			u->node = n;
60			node_add (u, n, &uplinks);
61			cnt.uplink++;
62			}
63
64			u->name = sstrdup (name);
65			u->host = sstrdup (host);
66			u->pass = sstrdup (password);
67			if (vhost)
68			u->vhost = sstrdup (vhost);
69			else
70			u->vhost = sstrdup ("0.0.0.0");
71			u->port = port;
72
73			return u;
74			}
75
76			void
77			uplink_delete (uplink_t *u)
78			{
79			node_t *n = node_find (u, &uplinks);
80
81	pippijn	1.4	sfree (u->name);
82			sfree (u->host);
83			sfree (u->pass);
84			sfree (u->vhost);
85	pippijn	1.1
86			node_del (n, &uplinks);
87			node_free (n);
88
89	pippijn	1.4	delete u;
90	pippijn	1.1	cnt.uplink--;
91			}
92
93			uplink_t *
94			uplink_find (char *name)
95			{
96			node_t *n;
97
98			LIST_FOREACH (n, uplinks.head)
99			{
100			uplink_t u = static_cast<uplink_t > (n->data);
101
102			if (!strcasecmp (u->name, name))
103			return u;
104			}
105
106			return NULL;
107			}
108
109			void
110			uplink_connect (void)
111			{
112			uplink_t *u;
113
114			if (curr_uplink == NULL)
115			{
116			if (uplinks.head == NULL)
117			{
118			slog (LG_ERROR, "uplink_connect(): no uplinks configured, exiting. Make sure to have at least one uplink{} block in your configuration file.");
119			exit (EXIT_FAILURE);
120			}
121			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
122			slog (LG_INFO, "uplink_connect(): connecting to first entry %s[%s]:%d.", curr_uplink->name, curr_uplink->host, curr_uplink->port);
123			}
124			else if (curr_uplink->node->next)
125			{
126			u = static_cast<uplink_t *> (curr_uplink->node->next->data);
127
128			curr_uplink = u;
129			slog (LG_INFO, "uplink_connect(): trying alternate uplink %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
130			}
131			else
132			{
133			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
134			slog (LG_INFO, "uplink_connect(): trying again first entry %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
135			}
136
137			u = curr_uplink;
138
139	pippijn	1.6	curr_uplink->conn = connection_t::open_tcp (u->host, u->vhost, u->port, recvq_put, sendq_flush);
140	pippijn	1.1	if (curr_uplink->conn != NULL)
141			curr_uplink->conn->close_handler = uplink_close;
142			else
143			event_add_once ("reconn", reconn, NULL, me.recontime);
144			}
145
146			/*
147			* uplink_close()
148			*
149			* inputs:
150			* connection pointer of current uplink
151			* triggered by callback close_handler
152			*
153			* outputs:
154			* none
155			*
156			* side effects:
157			* reconnection is scheduled
158			* uplink marked dead
159			* uplink deleted if it had been removed from configuration
160			*/
161			static void
162			uplink_close (connection_t *cptr)
163			{
164			event_add_once ("reconn", reconn, NULL, me.recontime);
165
166			me.connected = false;
167
168			if (curr_uplink->flags & UPF_ILLEGAL)
169			{
170			slog (LG_INFO, "uplink_close(): %s was removed from configuration, deleting", curr_uplink->name);
171			uplink_delete (curr_uplink);
172			if (uplinks.head == NULL)
173			{
174			slog (LG_ERROR, "uplink_close(): last uplink deleted, exiting.");
175			exit (EXIT_FAILURE);
176			}
177			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
178			}
179			curr_uplink->conn = NULL;
180
181			slog (LG_DEBUG, "uplink_close(): ----------------------- clearing -----------------------");
182
183			/* we have to kill everything.
184			* we do not clear users here because when you delete a server,
185			* it deletes its users
186			*/
187			if (me.actual != NULL)
188			server_delete (me.actual);
189			me.actual = NULL;
190			/* remove all the channels left */
191	pippijn	1.5	foreach (channel_pair &cp, chanlist)
192			channel_delete (cp.second);
193	pippijn	1.1	/* this leaves me.me and all users on it (i.e. services) */
194
195			slog (LG_DEBUG, "uplink_close(): ------------------------- done -------------------------");
196			}