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 1.3 2007-07-21 13:23:22 pippijn Exp $";

#include "atheme.h"
#include "datastream.h"
#include "uplink.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_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)
{
  channel_t *c;
  dictionary_iteration_state_t state;

  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 */
  DICTIONARY_FOREACH (c, channel_t, &state, chanlist)
  {
    channel_delete (c);
  }
  /* this leaves me.me and all users on it (i.e. services) */

  slog (LG_DEBUG, "uplink_close(): ------------------------- done -------------------------");
}
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:	+14 -19 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
#	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	1.4	static char const rcsid[] = "$Id: uplink.C,v 1.3 2007-07-21 13:23:22 pippijn Exp $";
9	pippijn	1.1
10			#include "atheme.h"
11			#include "datastream.h"
12			#include "uplink.h"
13
14			list_t uplinks;
15			uplink_t *curr_uplink;
16
17			static void uplink_close (connection_t *cptr);
18
19			void
20			init_uplinks (void)
21			{
22	pippijn	1.4	#if 0
23	pippijn	1.1	uplink_heap = BlockHeapCreate (sizeof (uplink_t), 4);
24	pippijn	1.4	#endif
25	pippijn	1.1	}
26
27			uplink_t *
28			uplink_add (char name, char host, char password, char vhost, int port)
29			{
30			uplink_t *u;
31			node_t *n;
32
33			slog (LG_DEBUG, "uplink_add(): %s -> %s:%d", me.name, name, port);
34
35			if ((u = uplink_find (name)))
36			{
37			if (u->flags & UPF_ILLEGAL)
38			{
39			u->flags &= ~UPF_ILLEGAL;
40	pippijn	1.4	sfree (u->name);
41			sfree (u->host);
42			sfree (u->pass);
43			sfree (u->vhost);
44	pippijn	1.1	}
45			else
46			{
47			slog (LG_INFO, "Duplicate uplink %s.", name);
48			return NULL;
49			}
50			}
51			else
52			{
53	pippijn	1.4	u = new uplink_t;
54	pippijn	1.1	n = node_create ();
55			u->node = n;
56			node_add (u, n, &uplinks);
57			cnt.uplink++;
58			}
59
60			u->name = sstrdup (name);
61			u->host = sstrdup (host);
62			u->pass = sstrdup (password);
63			if (vhost)
64			u->vhost = sstrdup (vhost);
65			else
66			u->vhost = sstrdup ("0.0.0.0");
67			u->port = port;
68
69			return u;
70			}
71
72			void
73			uplink_delete (uplink_t *u)
74			{
75			node_t *n = node_find (u, &uplinks);
76
77	pippijn	1.4	sfree (u->name);
78			sfree (u->host);
79			sfree (u->pass);
80			sfree (u->vhost);
81	pippijn	1.1
82			node_del (n, &uplinks);
83			node_free (n);
84
85	pippijn	1.4	delete u;
86	pippijn	1.1	cnt.uplink--;
87			}
88
89			uplink_t *
90			uplink_find (char *name)
91			{
92			node_t *n;
93
94			LIST_FOREACH (n, uplinks.head)
95			{
96			uplink_t u = static_cast<uplink_t > (n->data);
97
98			if (!strcasecmp (u->name, name))
99			return u;
100			}
101
102			return NULL;
103			}
104
105			void
106			uplink_connect (void)
107			{
108			uplink_t *u;
109
110			if (curr_uplink == NULL)
111			{
112			if (uplinks.head == NULL)
113			{
114			slog (LG_ERROR, "uplink_connect(): no uplinks configured, exiting. Make sure to have at least one uplink{} block in your configuration file.");
115			exit (EXIT_FAILURE);
116			}
117			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
118			slog (LG_INFO, "uplink_connect(): connecting to first entry %s[%s]:%d.", curr_uplink->name, curr_uplink->host, curr_uplink->port);
119			}
120			else if (curr_uplink->node->next)
121			{
122			u = static_cast<uplink_t *> (curr_uplink->node->next->data);
123
124			curr_uplink = u;
125			slog (LG_INFO, "uplink_connect(): trying alternate uplink %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
126			}
127			else
128			{
129			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
130			slog (LG_INFO, "uplink_connect(): trying again first entry %s[%s]:%d", curr_uplink->name, curr_uplink->host, curr_uplink->port);
131			}
132
133			u = curr_uplink;
134
135			curr_uplink->conn = connection_open_tcp (u->host, u->vhost, u->port, recvq_put, sendq_flush);
136			if (curr_uplink->conn != NULL)
137			curr_uplink->conn->close_handler = uplink_close;
138			else
139			event_add_once ("reconn", reconn, NULL, me.recontime);
140			}
141
142			/*
143			* uplink_close()
144			*
145			* inputs:
146			* connection pointer of current uplink
147			* triggered by callback close_handler
148			*
149			* outputs:
150			* none
151			*
152			* side effects:
153			* reconnection is scheduled
154			* uplink marked dead
155			* uplink deleted if it had been removed from configuration
156			*/
157			static void
158			uplink_close (connection_t *cptr)
159			{
160			channel_t *c;
161			dictionary_iteration_state_t state;
162
163			event_add_once ("reconn", reconn, NULL, me.recontime);
164
165			me.connected = false;
166
167			if (curr_uplink->flags & UPF_ILLEGAL)
168			{
169			slog (LG_INFO, "uplink_close(): %s was removed from configuration, deleting", curr_uplink->name);
170			uplink_delete (curr_uplink);
171			if (uplinks.head == NULL)
172			{
173			slog (LG_ERROR, "uplink_close(): last uplink deleted, exiting.");
174			exit (EXIT_FAILURE);
175			}
176			curr_uplink = static_cast<uplink_t *> (uplinks.head->data);
177			}
178			curr_uplink->conn = NULL;
179
180			slog (LG_DEBUG, "uplink_close(): ----------------------- clearing -----------------------");
181
182			/* we have to kill everything.
183			* we do not clear users here because when you delete a server,
184			* it deletes its users
185			*/
186			if (me.actual != NULL)
187			server_delete (me.actual);
188			me.actual = NULL;
189			/* remove all the channels left */
190			DICTIONARY_FOREACH (c, channel_t, &state, chanlist)
191			{
192			channel_delete (c);
193			}
194			/* this leaves me.me and all users on it (i.e. services) */
195
196			slog (LG_DEBUG, "uplink_close(): ------------------------- done -------------------------");
197			}