source: src/router/dnsmasq/src/dbus.c @ 31703

Last change on this file since 31703 was 31703, checked in by brainslayer, 4 months ago

latest dnsmasq

File size: 24.6 KB
Line 
1/* dnsmasq is Copyright (c) 2000-2016 Simon Kelley
2
3   This program is free software; you can redistribute it and/or modify
4   it under the terms of the GNU General Public License as published by
5   the Free Software Foundation; version 2 dated June, 1991, or
6   (at your option) version 3 dated 29 June, 2007.
7 
8   This program is distributed in the hope that it will be useful,
9   but WITHOUT ANY WARRANTY; without even the implied warranty of
10   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11   GNU General Public License for more details.
12     
13   You should have received a copy of the GNU General Public License
14   along with this program.  If not, see <http://www.gnu.org/licenses/>.
15*/
16
17#include "dnsmasq.h"
18
19#ifdef HAVE_DBUS
20
21#include <dbus/dbus.h>
22
23const char* introspection_xml_template =
24"<!DOCTYPE node PUBLIC \"-//freedesktop//DTD D-BUS Object Introspection 1.0//EN\"\n"
25"\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
26"<node name=\"" DNSMASQ_PATH "\">\n"
27"  <interface name=\"org.freedesktop.DBus.Introspectable\">\n"
28"    <method name=\"Introspect\">\n"
29"      <arg name=\"data\" direction=\"out\" type=\"s\"/>\n"
30"    </method>\n"
31"  </interface>\n"
32"  <interface name=\"%s\">\n"
33"    <method name=\"ClearCache\">\n"
34"    </method>\n"
35"    <method name=\"GetVersion\">\n"
36"      <arg name=\"version\" direction=\"out\" type=\"s\"/>\n"
37"    </method>\n"
38#ifdef HAVE_LOOP
39"    <method name=\"GetLoopServers\">\n"
40"      <arg name=\"server\" direction=\"out\" type=\"as\"/>\n"
41"    </method>\n"
42#endif
43"    <method name=\"SetServers\">\n"
44"      <arg name=\"servers\" direction=\"in\" type=\"av\"/>\n"
45"    </method>\n"
46"    <method name=\"SetDomainServers\">\n"
47"      <arg name=\"servers\" direction=\"in\" type=\"as\"/>\n"
48"    </method>\n"
49"    <method name=\"SetServersEx\">\n"
50"      <arg name=\"servers\" direction=\"in\" type=\"aas\"/>\n"
51"    </method>\n"
52"    <method name=\"SetFilterWin2KOption\">\n"
53"      <arg name=\"filterwin2k\" direction=\"in\" type=\"b\"/>\n"
54"    </method>\n"
55"    <method name=\"SetBogusPrivOption\">\n"
56"      <arg name=\"boguspriv\" direction=\"in\" type=\"b\"/>\n"
57"    </method>\n"
58"    <signal name=\"DhcpLeaseAdded\">\n"
59"      <arg name=\"ipaddr\" type=\"s\"/>\n"
60"      <arg name=\"hwaddr\" type=\"s\"/>\n"
61"      <arg name=\"hostname\" type=\"s\"/>\n"
62"    </signal>\n"
63"    <signal name=\"DhcpLeaseDeleted\">\n"
64"      <arg name=\"ipaddr\" type=\"s\"/>\n"
65"      <arg name=\"hwaddr\" type=\"s\"/>\n"
66"      <arg name=\"hostname\" type=\"s\"/>\n"
67"    </signal>\n"
68"    <signal name=\"DhcpLeaseUpdated\">\n"
69"      <arg name=\"ipaddr\" type=\"s\"/>\n"
70"      <arg name=\"hwaddr\" type=\"s\"/>\n"
71"      <arg name=\"hostname\" type=\"s\"/>\n"
72"    </signal>\n"
73#ifdef HAVE_DHCP
74"    <method name=\"AddDhcpLease\">\n"
75"       <arg name=\"ipaddr\" type=\"s\"/>\n"
76"       <arg name=\"hwaddr\" type=\"s\"/>\n"
77"       <arg name=\"hostname\" type=\"ay\"/>\n"
78"       <arg name=\"clid\" type=\"ay\"/>\n"
79"       <arg name=\"lease_duration\" type=\"u\"/>\n"
80"       <arg name=\"ia_id\" type=\"u\"/>\n"
81"       <arg name=\"is_temporary\" type=\"b\"/>\n"
82"    </method>\n"
83"    <method name=\"DeleteDhcpLease\">\n"
84"       <arg name=\"ipaddr\" type=\"s\"/>\n"
85"       <arg name=\"success\" type=\"b\" direction=\"out\"/>\n"
86"    </method>\n"
87#endif
88"  </interface>\n"
89"</node>\n";
90
91static char *introspection_xml = NULL;
92
93struct watch {
94  DBusWatch *watch;     
95  struct watch *next;
96};
97
98
99static dbus_bool_t add_watch(DBusWatch *watch, void *data)
100{
101  struct watch *w;
102
103  for (w = daemon->watches; w; w = w->next)
104    if (w->watch == watch)
105      return TRUE;
106
107  if (!(w = whine_malloc(sizeof(struct watch))))
108    return FALSE;
109
110  w->watch = watch;
111  w->next = daemon->watches;
112  daemon->watches = w;
113
114  w = data; /* no warning */
115  return TRUE;
116}
117
118static void remove_watch(DBusWatch *watch, void *data)
119{
120  struct watch **up, *w, *tmp; 
121 
122  for (up = &(daemon->watches), w = daemon->watches; w; w = tmp)
123    {
124      tmp = w->next;
125      if (w->watch == watch)
126        {
127          *up = tmp;
128          free(w);
129        }
130      else
131        up = &(w->next);
132    }
133
134  w = data; /* no warning */
135}
136
137static void dbus_read_servers(DBusMessage *message)
138{
139  DBusMessageIter iter;
140  union  mysockaddr addr, source_addr;
141  char *domain;
142 
143  dbus_message_iter_init(message, &iter);
144
145  mark_servers(SERV_FROM_DBUS);
146 
147  while (1)
148    {
149      int skip = 0;
150
151      if (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_UINT32)
152        {
153          u32 a;
154         
155          dbus_message_iter_get_basic(&iter, &a);
156          dbus_message_iter_next (&iter);
157         
158#ifdef HAVE_SOCKADDR_SA_LEN
159          source_addr.in.sin_len = addr.in.sin_len = sizeof(struct sockaddr_in);
160#endif
161          addr.in.sin_addr.s_addr = ntohl(a);
162          source_addr.in.sin_family = addr.in.sin_family = AF_INET;
163          addr.in.sin_port = htons(NAMESERVER_PORT);
164          source_addr.in.sin_addr.s_addr = INADDR_ANY;
165          source_addr.in.sin_port = htons(daemon->query_port);
166        }
167      else if (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_BYTE)
168        {
169          unsigned char p[sizeof(struct in6_addr)];
170          unsigned int i;
171
172          skip = 1;
173
174          for(i = 0; i < sizeof(struct in6_addr); i++)
175            {
176              dbus_message_iter_get_basic(&iter, &p[i]);
177              dbus_message_iter_next (&iter);
178              if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BYTE)
179                {
180                  i++;
181                  break;
182                }
183            }
184
185#ifndef HAVE_IPV6
186          my_syslog(LOG_WARNING, _("attempt to set an IPv6 server address via DBus - no IPv6 support"));
187#else
188          if (i == sizeof(struct in6_addr))
189            {
190              memcpy(&addr.in6.sin6_addr, p, sizeof(struct in6_addr));
191#ifdef HAVE_SOCKADDR_SA_LEN
192              source_addr.in6.sin6_len = addr.in6.sin6_len = sizeof(struct sockaddr_in6);
193#endif
194              source_addr.in6.sin6_family = addr.in6.sin6_family = AF_INET6;
195              addr.in6.sin6_port = htons(NAMESERVER_PORT);
196              source_addr.in6.sin6_flowinfo = addr.in6.sin6_flowinfo = 0;
197              source_addr.in6.sin6_scope_id = addr.in6.sin6_scope_id = 0;
198              source_addr.in6.sin6_addr = in6addr_any;
199              source_addr.in6.sin6_port = htons(daemon->query_port);
200              skip = 0;
201            }
202#endif
203        }
204      else
205        /* At the end */
206        break;
207     
208      /* process each domain */
209      do {
210        if (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_STRING)
211          {
212            dbus_message_iter_get_basic(&iter, &domain);
213            dbus_message_iter_next (&iter);
214          }
215        else
216          domain = NULL;
217       
218        if (!skip)
219          add_update_server(SERV_FROM_DBUS, &addr, &source_addr, NULL, domain);
220     
221      } while (dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_STRING);
222    }
223   
224  /* unlink and free anything still marked. */
225  cleanup_servers();
226}
227
228#ifdef HAVE_LOOP
229static DBusMessage *dbus_reply_server_loop(DBusMessage *message)
230{
231  DBusMessageIter args, args_iter;
232  struct server *serv;
233  DBusMessage *reply = dbus_message_new_method_return(message);
234   
235  dbus_message_iter_init_append (reply, &args);
236  dbus_message_iter_open_container (&args, DBUS_TYPE_ARRAY,DBUS_TYPE_STRING_AS_STRING, &args_iter);
237
238  for (serv = daemon->servers; serv; serv = serv->next)
239    if (serv->flags & SERV_LOOP)
240      {
241        prettyprint_addr(&serv->addr, daemon->addrbuff);
242        dbus_message_iter_append_basic (&args_iter, DBUS_TYPE_STRING, &daemon->addrbuff);
243      }
244 
245  dbus_message_iter_close_container (&args, &args_iter);
246
247  return reply;
248}
249#endif
250
251static DBusMessage* dbus_read_servers_ex(DBusMessage *message, int strings)
252{
253  DBusMessageIter iter, array_iter, string_iter;
254  DBusMessage *error = NULL;
255  const char *addr_err;
256  char *dup = NULL;
257 
258  if (!dbus_message_iter_init(message, &iter))
259    {
260      return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
261                                    "Failed to initialize dbus message iter");
262    }
263
264  /* check that the message contains an array of arrays */
265  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
266      (dbus_message_iter_get_element_type(&iter) != (strings ? DBUS_TYPE_STRING : DBUS_TYPE_ARRAY)))
267    {
268      return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
269                                    strings ? "Expected array of string" : "Expected array of string arrays");
270     }
271 
272  mark_servers(SERV_FROM_DBUS);
273
274  /* array_iter points to each "as" element in the outer array */
275  dbus_message_iter_recurse(&iter, &array_iter);
276  while (dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_INVALID)
277    {
278      const char *str = NULL;
279      union  mysockaddr addr, source_addr;
280      int flags = 0;
281      char interface[IF_NAMESIZE];
282      char *str_addr, *str_domain = NULL;
283
284      if (strings)
285        {
286          dbus_message_iter_get_basic(&array_iter, &str);
287          if (!str || !strlen (str))
288            {
289              error = dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
290                                             "Empty string");
291              break;
292            }
293         
294          /* dup the string because it gets modified during parsing */
295          if (dup)
296            free(dup);
297          if (!(dup = str_domain = whine_malloc(strlen(str)+1)))
298            break;
299         
300          strcpy(str_domain, str);
301
302          /* point to address part of old string for error message */
303          if ((str_addr = strrchr(str, '/')))
304            str = str_addr+1;
305         
306          if ((str_addr = strrchr(str_domain, '/')))
307            {
308              if (*str_domain != '/' || str_addr == str_domain)
309                {
310                  error = dbus_message_new_error_printf(message,
311                                                        DBUS_ERROR_INVALID_ARGS,
312                                                        "No domain terminator '%s'",
313                                                        str);
314                  break;
315                }
316              *str_addr++ = 0;
317              str_domain++;
318            }
319          else
320            {
321              str_addr = str_domain;
322              str_domain = NULL;
323            }
324
325         
326        }
327      else
328        {
329          /* check the types of the struct and its elements */
330          if ((dbus_message_iter_get_arg_type(&array_iter) != DBUS_TYPE_ARRAY) ||
331              (dbus_message_iter_get_element_type(&array_iter) != DBUS_TYPE_STRING))
332            {
333              error = dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
334                                             "Expected inner array of strings");
335              break;
336            }
337         
338          /* string_iter points to each "s" element in the inner array */
339          dbus_message_iter_recurse(&array_iter, &string_iter);
340          if (dbus_message_iter_get_arg_type(&string_iter) != DBUS_TYPE_STRING)
341            {
342              /* no IP address given */
343              error = dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
344                                             "Expected IP address");
345              break;
346            }
347         
348          dbus_message_iter_get_basic(&string_iter, &str);
349          if (!str || !strlen (str))
350            {
351              error = dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
352                                             "Empty IP address");
353              break;
354            }
355         
356          /* dup the string because it gets modified during parsing */
357          if (dup)
358            free(dup);
359          if (!(dup = str_addr = whine_malloc(strlen(str)+1)))
360            break;
361         
362          strcpy(str_addr, str);
363        }
364
365      memset(&addr, 0, sizeof(addr));
366      memset(&source_addr, 0, sizeof(source_addr));
367      memset(&interface, 0, sizeof(interface));
368
369      /* parse the IP address */
370      if ((addr_err = parse_server(str_addr, &addr, &source_addr, (char *) &interface, &flags)))
371        {
372          error = dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
373                                                "Invalid IP address '%s': %s",
374                                                str, addr_err);
375          break;
376        }
377     
378      /* 0.0.0.0 for server address == NULL, for Dbus */
379      if (addr.in.sin_family == AF_INET &&
380          addr.in.sin_addr.s_addr == 0)
381        flags |= SERV_NO_ADDR;
382     
383      if (strings)
384        {
385          char *p;
386         
387          do {
388            if (str_domain)
389              {
390                if ((p = strchr(str_domain, '/')))
391                  *p++ = 0;
392              }
393            else
394              p = NULL;
395           
396            add_update_server(flags | SERV_FROM_DBUS, &addr, &source_addr, interface, str_domain);
397          } while ((str_domain = p));
398        }
399      else
400        {
401          /* jump past the address to the domain list (if any) */
402          dbus_message_iter_next (&string_iter);
403         
404          /* parse domains and add each server/domain pair to the list */
405          do {
406            str = NULL;
407            if (dbus_message_iter_get_arg_type(&string_iter) == DBUS_TYPE_STRING)
408              dbus_message_iter_get_basic(&string_iter, &str);
409            dbus_message_iter_next (&string_iter);
410           
411            add_update_server(flags | SERV_FROM_DBUS, &addr, &source_addr, interface, str);
412          } while (dbus_message_iter_get_arg_type(&string_iter) == DBUS_TYPE_STRING);
413        }
414         
415      /* jump to next element in outer array */
416      dbus_message_iter_next(&array_iter);
417    }
418
419  cleanup_servers();
420
421  if (dup)
422    free(dup);
423
424  return error;
425}
426
427static DBusMessage *dbus_set_bool(DBusMessage *message, int flag, char *name)
428{
429  DBusMessageIter iter;
430  dbus_bool_t enabled;
431
432  if (!dbus_message_iter_init(message, &iter) || dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
433    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS, "Expected boolean argument");
434 
435  dbus_message_iter_get_basic(&iter, &enabled);
436
437  if (enabled)
438    {
439      my_syslog(LOG_INFO, _("Enabling --%s option from D-Bus"), name);
440      set_option_bool(flag);
441    }
442  else
443    {
444      my_syslog(LOG_INFO, _("Disabling --%s option from D-Bus"), name);
445      reset_option_bool(flag);
446    }
447
448  return NULL;
449}
450
451#ifdef HAVE_DHCP
452static DBusMessage *dbus_add_lease(DBusMessage* message)
453{
454  struct dhcp_lease *lease;
455  const char *ipaddr, *hwaddr, *hostname, *tmp;
456  const unsigned char* clid;
457  int clid_len, hostname_len, hw_len, hw_type;
458  dbus_uint32_t expires, ia_id;
459  dbus_bool_t is_temporary;
460  struct all_addr addr;
461  time_t now = dnsmasq_time();
462  unsigned char dhcp_chaddr[DHCP_CHADDR_MAX];
463
464  DBusMessageIter iter, array_iter;
465  if (!dbus_message_iter_init(message, &iter))
466    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
467                                  "Failed to initialize dbus message iter");
468
469  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
470    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
471                                  "Expected string as first argument");
472
473  dbus_message_iter_get_basic(&iter, &ipaddr);
474  dbus_message_iter_next(&iter);
475
476  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
477    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
478                                  "Expected string as second argument");
479   
480  dbus_message_iter_get_basic(&iter, &hwaddr);
481  dbus_message_iter_next(&iter);
482
483  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
484      (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE))
485    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
486                                  "Expected byte array as third argument");
487   
488  dbus_message_iter_recurse(&iter, &array_iter);
489  dbus_message_iter_get_fixed_array(&array_iter, &hostname, &hostname_len);
490  tmp = memchr(hostname, '\0', hostname_len);
491  if (tmp)
492    {
493      if (tmp == &hostname[hostname_len - 1])
494        hostname_len--;
495      else
496        return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
497                                      "Hostname contains an embedded NUL character");
498    }
499  dbus_message_iter_next(&iter);
500
501  if ((dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) ||
502      (dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_BYTE))
503    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
504                                  "Expected byte array as fourth argument");
505
506  dbus_message_iter_recurse(&iter, &array_iter);
507  dbus_message_iter_get_fixed_array(&array_iter, &clid, &clid_len);
508  dbus_message_iter_next(&iter);
509
510  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
511    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
512                                  "Expected uint32 as fifth argument");
513   
514  dbus_message_iter_get_basic(&iter, &expires);
515  dbus_message_iter_next(&iter);
516
517  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
518    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
519                                    "Expected uint32 as sixth argument");
520 
521  dbus_message_iter_get_basic(&iter, &ia_id);
522  dbus_message_iter_next(&iter);
523
524  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
525    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
526                                  "Expected uint32 as sixth argument");
527
528  dbus_message_iter_get_basic(&iter, &is_temporary);
529
530  if (inet_pton(AF_INET, ipaddr, &addr.addr.addr4))
531    {
532      if (ia_id != 0 || is_temporary)
533        return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
534                                      "ia_id and is_temporary must be zero for IPv4 lease");
535     
536      if (!(lease = lease_find_by_addr(addr.addr.addr4)))
537        lease = lease4_allocate(addr.addr.addr4);
538    }
539#ifdef HAVE_DHCP6
540  else if (inet_pton(AF_INET6, ipaddr, &addr.addr.addr6))
541    {
542      if (!(lease = lease6_find_by_addr(&addr.addr.addr6, 128, 0)))
543        lease = lease6_allocate(&addr.addr.addr6,
544                                is_temporary ? LEASE_TA : LEASE_NA);
545      lease_set_iaid(lease, ia_id);
546    }
547#endif
548  else
549    return dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
550                                         "Invalid IP address '%s'", ipaddr);
551   
552  hw_len = parse_hex((char*)hwaddr, dhcp_chaddr, DHCP_CHADDR_MAX, NULL, &hw_type);
553  if (hw_type == 0 && hw_len != 0)
554    hw_type = ARPHRD_ETHER;
555 
556  lease_set_hwaddr(lease, dhcp_chaddr, clid, hw_len, hw_type,
557                   clid_len, now, 0);
558  lease_set_expires(lease, expires, now);
559  if (hostname_len != 0)
560    lease_set_hostname(lease, hostname, 0, get_domain(lease->addr), NULL);
561 
562  lease_update_file(now);
563  lease_update_dns(0);
564
565  return NULL;
566}
567
568static DBusMessage *dbus_del_lease(DBusMessage* message)
569{
570  struct dhcp_lease *lease;
571  DBusMessageIter iter;
572  const char *ipaddr;
573  DBusMessage *reply;
574  struct all_addr addr;
575  dbus_bool_t ret = 1;
576  time_t now = dnsmasq_time();
577
578  if (!dbus_message_iter_init(message, &iter))
579    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
580                                  "Failed to initialize dbus message iter");
581   
582  if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
583    return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
584                                  "Expected string as first argument");
585   
586  dbus_message_iter_get_basic(&iter, &ipaddr);
587
588  if (inet_pton(AF_INET, ipaddr, &addr.addr.addr4))
589    lease = lease_find_by_addr(addr.addr.addr4);
590#ifdef HAVE_DHCP6
591  else if (inet_pton(AF_INET6, ipaddr, &addr.addr.addr6))
592    lease = lease6_find_by_addr(&addr.addr.addr6, 128, 0);
593#endif
594  else
595    return dbus_message_new_error_printf(message, DBUS_ERROR_INVALID_ARGS,
596                                         "Invalid IP address '%s'", ipaddr);
597   
598  if (lease)
599    {
600      lease_prune(lease, now);
601      lease_update_file(now);
602      lease_update_dns(0);
603    }
604  else
605    ret = 0;
606 
607  if ((reply = dbus_message_new_method_return(message)))
608    dbus_message_append_args(reply, DBUS_TYPE_BOOLEAN, &ret,
609                             DBUS_TYPE_INVALID);
610 
611   
612  return reply;
613}
614#endif
615
616DBusHandlerResult message_handler(DBusConnection *connection,
617                                  DBusMessage *message,
618                                  void *user_data)
619{
620  char *method = (char *)dbus_message_get_member(message);
621  DBusMessage *reply = NULL;
622  int clear_cache = 0, new_servers = 0;
623   
624  if (dbus_message_is_method_call(message, DBUS_INTERFACE_INTROSPECTABLE, "Introspect"))
625    {
626      /* string length: "%s" provides space for termination zero */
627      if (!introspection_xml &&
628          (introspection_xml = whine_malloc(strlen(introspection_xml_template) + strlen(daemon->dbus_name))))
629        sprintf(introspection_xml, introspection_xml_template, daemon->dbus_name);
630   
631      if (introspection_xml)
632        {
633          reply = dbus_message_new_method_return(message);
634          dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection_xml, DBUS_TYPE_INVALID);
635        }
636    }
637  else if (strcmp(method, "GetVersion") == 0)
638    {
639      char *v = VERSION;
640      reply = dbus_message_new_method_return(message);
641     
642      dbus_message_append_args(reply, DBUS_TYPE_STRING, &v, DBUS_TYPE_INVALID);
643    }
644#ifdef HAVE_LOOP
645  else if (strcmp(method, "GetLoopServers") == 0)
646    {
647      reply = dbus_reply_server_loop(message);
648    }
649#endif
650  else if (strcmp(method, "SetServers") == 0)
651    {
652      dbus_read_servers(message);
653      new_servers = 1;
654    }
655  else if (strcmp(method, "SetServersEx") == 0)
656    {
657      reply = dbus_read_servers_ex(message, 0);
658      new_servers = 1;
659    }
660  else if (strcmp(method, "SetDomainServers") == 0)
661    {
662      reply = dbus_read_servers_ex(message, 1);
663      new_servers = 1;
664    }
665  else if (strcmp(method, "SetFilterWin2KOption") == 0)
666    {
667      reply = dbus_set_bool(message, OPT_FILTER, "filterwin2k");
668    }
669  else if (strcmp(method, "SetBogusPrivOption") == 0)
670    {
671      reply = dbus_set_bool(message, OPT_BOGUSPRIV, "bogus-priv");
672    }
673#ifdef HAVE_DHCP
674  else if (strcmp(method, "AddDhcpLease") == 0)
675    {
676      reply = dbus_add_lease(message);
677    }
678  else if (strcmp(method, "DeleteDhcpLease") == 0)
679    {
680      reply = dbus_del_lease(message);
681    }
682#endif
683  else if (strcmp(method, "ClearCache") == 0)
684    clear_cache = 1;
685  else
686    return (DBUS_HANDLER_RESULT_NOT_YET_HANDLED);
687   
688  if (new_servers)
689    {
690      my_syslog(LOG_INFO, _("setting upstream servers from DBus"));
691      check_servers();
692      if (option_bool(OPT_RELOAD))
693        clear_cache = 1;
694    }
695
696  if (clear_cache)
697    clear_cache_and_reload(dnsmasq_time());
698 
699  method = user_data; /* no warning */
700
701  /* If no reply or no error, return nothing */
702  if (!reply)
703    reply = dbus_message_new_method_return(message);
704
705  if (reply)
706    {
707      dbus_connection_send (connection, reply, NULL);
708      dbus_message_unref (reply);
709    }
710
711  return (DBUS_HANDLER_RESULT_HANDLED);
712}
713 
714
715/* returns NULL or error message, may fail silently if dbus daemon not yet up. */
716char *dbus_init(void)
717{
718  DBusConnection *connection = NULL;
719  DBusObjectPathVTable dnsmasq_vtable = {NULL, &message_handler, NULL, NULL, NULL, NULL };
720  DBusError dbus_error;
721  DBusMessage *message;
722
723  dbus_error_init (&dbus_error);
724  if (!(connection = dbus_bus_get (DBUS_BUS_SYSTEM, &dbus_error)))
725    return NULL;
726   
727  dbus_connection_set_exit_on_disconnect(connection, FALSE);
728  dbus_connection_set_watch_functions(connection, add_watch, remove_watch,
729                                      NULL, NULL, NULL);
730  dbus_error_init (&dbus_error);
731  dbus_bus_request_name (connection, daemon->dbus_name, 0, &dbus_error);
732  if (dbus_error_is_set (&dbus_error))
733    return (char *)dbus_error.message;
734 
735  if (!dbus_connection_register_object_path(connection,  DNSMASQ_PATH,
736                                            &dnsmasq_vtable, NULL))
737    return _("could not register a DBus message handler");
738 
739  daemon->dbus = connection;
740 
741  if ((message = dbus_message_new_signal(DNSMASQ_PATH, daemon->dbus_name, "Up")))
742    {
743      dbus_connection_send(connection, message, NULL);
744      dbus_message_unref(message);
745    }
746
747  return NULL;
748}
749 
750
751void set_dbus_listeners(void)
752{
753  struct watch *w;
754 
755  for (w = daemon->watches; w; w = w->next)
756    if (dbus_watch_get_enabled(w->watch))
757      {
758        unsigned int flags = dbus_watch_get_flags(w->watch);
759        int fd = dbus_watch_get_unix_fd(w->watch);
760       
761        if (flags & DBUS_WATCH_READABLE)
762          poll_listen(fd, POLLIN);
763       
764        if (flags & DBUS_WATCH_WRITABLE)
765          poll_listen(fd, POLLOUT);
766       
767        poll_listen(fd, POLLERR);
768      }
769}
770
771void check_dbus_listeners()
772{
773  DBusConnection *connection = (DBusConnection *)daemon->dbus;
774  struct watch *w;
775
776  for (w = daemon->watches; w; w = w->next)
777    if (dbus_watch_get_enabled(w->watch))
778      {
779        unsigned int flags = 0;
780        int fd = dbus_watch_get_unix_fd(w->watch);
781       
782        if (poll_check(fd, POLLIN))
783          flags |= DBUS_WATCH_READABLE;
784       
785        if (poll_check(fd, POLLOUT))
786          flags |= DBUS_WATCH_WRITABLE;
787       
788        if (poll_check(fd, POLLERR))
789          flags |= DBUS_WATCH_ERROR;
790
791        if (flags != 0)
792          dbus_watch_handle(w->watch, flags);
793      }
794
795  if (connection)
796    {
797      dbus_connection_ref (connection);
798      while (dbus_connection_dispatch (connection) == DBUS_DISPATCH_DATA_REMAINS);
799      dbus_connection_unref (connection);
800    }
801}
802
803#ifdef HAVE_DHCP
804void emit_dbus_signal(int action, struct dhcp_lease *lease, char *hostname)
805{
806  DBusConnection *connection = (DBusConnection *)daemon->dbus;
807  DBusMessage* message = NULL;
808  DBusMessageIter args;
809  char *action_str, *mac = daemon->namebuff;
810  unsigned char *p;
811  int i;
812
813  if (!connection)
814    return;
815 
816  if (!hostname)
817    hostname = "";
818 
819#ifdef HAVE_DHCP6
820   if (lease->flags & (LEASE_TA | LEASE_NA))
821     {
822       print_mac(mac, lease->clid, lease->clid_len);
823       inet_ntop(AF_INET6, &lease->addr6, daemon->addrbuff, ADDRSTRLEN);
824     }
825   else
826#endif
827     {
828       p = extended_hwaddr(lease->hwaddr_type, lease->hwaddr_len,
829                           lease->hwaddr, lease->clid_len, lease->clid, &i);
830       print_mac(mac, p, i);
831       inet_ntop(AF_INET, &lease->addr, daemon->addrbuff, ADDRSTRLEN);
832     }
833
834  if (action == ACTION_DEL)
835    action_str = "DhcpLeaseDeleted";
836  else if (action == ACTION_ADD)
837    action_str = "DhcpLeaseAdded";
838  else if (action == ACTION_OLD)
839    action_str = "DhcpLeaseUpdated";
840  else
841    return;
842
843  if (!(message = dbus_message_new_signal(DNSMASQ_PATH, daemon->dbus_name, action_str)))
844    return;
845 
846  dbus_message_iter_init_append(message, &args);
847 
848  if (dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &daemon->addrbuff) &&
849      dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &mac) &&
850      dbus_message_iter_append_basic(&args, DBUS_TYPE_STRING, &hostname))
851    dbus_connection_send(connection, message, NULL);
852 
853  dbus_message_unref(message);
854}
855#endif
856
857#endif
Note: See TracBrowser for help on using the repository browser.