2 This file is part of catta.
4 catta is free software; you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as
6 published by the Free Software Foundation; either version 2.1 of the
7 License, or (at your option) any later version.
9 catta is distributed in the hope that it will be useful, but WITHOUT
10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12 Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with catta; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 #include "iface-windows.h"
23 #include <stdlib.h> // wcstombs
24 #include <catta/malloc.h>
25 #include <catta/log.h>
29 #include "util.h" // catta_format_mac_address
30 #include "fdutil.h" // catta_set_nonblock
34 INTERFACE_CHANGE_EVENT,
39 CATTA_LLIST_FIELDS(ChangeEvent, event);
41 MIB_NOTIFICATION_TYPE notification_type;
43 MIB_IPINTERFACE_ROW iface;
44 MIB_UNICASTIPADDRESS_ROW addr;
49 // helper: determine the global_scope flag for an address
50 static void set_global_scope_flag(CattaInterfaceAddress *ifaddr, const CattaAddress *addr)
52 if(addr->proto == CATTA_PROTO_INET6) {
53 const struct in6_addr *ia = (struct in6_addr *)addr->data.ipv6.address;
54 ifaddr->global_scope = !(IN6_IS_ADDR_LINKLOCAL(ia) || IN6_IS_ADDR_MULTICAST(ia));
56 ifaddr->global_scope = 1;
60 // integrate the information from an IP_ADAPTER_UNICAST_ADDRESS structure for
61 // given CattaHwInterface into the CattaInterfaceMonitor
62 static void ip_adapter_unicast_address(CattaInterfaceMonitor *m,
64 IP_ADAPTER_UNICAST_ADDRESS *a)
66 CattaInterface *iface;
68 CattaInterfaceAddress *ifaddr;
69 struct sockaddr *sa = a->Address.lpSockaddr;
71 // skip transient addresses; to quote MSDN: "The IP address is a cluster
72 // address and should not be used by most applications."
73 // http://msdn.microsoft.com/en-us/library/windows/desktop/aa366066(v=vs.85).aspx
74 if(a->Flags & IP_ADAPTER_ADDRESS_TRANSIENT)
77 // fill addr struct for address lookup
78 switch(sa->sa_family) {
80 memcpy(addr.data.data, &((struct sockaddr_in *)sa)->sin_addr, sizeof(struct in_addr));
83 memcpy(addr.data.data, &((struct sockaddr_in6 *)sa)->sin6_addr, sizeof(struct in6_addr));
86 catta_log_debug("unexpected address family on interface %d: %u", hw->index, sa->sa_family);
89 addr.proto = catta_af_to_proto(sa->sa_family);
91 // get protocol-specific CattaInterface object
92 if(!(iface = catta_interface_monitor_get_interface(m, hw->index, addr.proto))) {
93 catta_log_error("CattaInterface (index %d, proto %d) not found", hw->index, addr.proto);
97 // find or allocate a CattaInterfaceAddress struct for this address
98 if(!(ifaddr = catta_interface_monitor_get_address(m, iface, &addr))) {
99 if(!(ifaddr = catta_interface_address_new(m, iface, &addr, a->OnLinkPrefixLength))) {
100 catta_log_error("out of memory in ip_adapter_unicast_address");
105 set_global_scope_flag(ifaddr, &addr);
108 // integrate the information from an IP_ADAPTER_ADDRESSES structure
109 // as returned by GetAdaptersAddresses into the CattaInterfaceMonitor
110 static void ip_adapter(CattaInterfaceMonitor *m, IP_ADAPTER_ADDRESSES *p)
112 IP_ADAPTER_UNICAST_ADDRESS *a;
114 CattaHwInterface *hw;
117 // we want an index specific to the hardware interface, but Windows
118 // has one for IPv4 and one for IPv6. it seems like these are always the
119 // same unless one of the protocols is not available. let's have a bunch of
121 if(!p->IfIndex && !p->Ipv6IfIndex) {
122 return; // no usable protocols
123 } else if(!p->IfIndex) {
124 idx = p->Ipv6IfIndex; // IPv6 but no IPv4 (huh!)
125 } else if(!p->Ipv6IfIndex) {
126 idx = p->IfIndex; // IPv4 but no IPv6
127 } else if(p->IfIndex == p->Ipv6IfIndex) {
128 idx = p->IfIndex; // same index for both protocols
130 // both indexes valid but not equal
131 catta_log_error("unsupported interface: %ls (IfIndex and Ipv6IfIndex differ: %u/%u)",
132 p->FriendlyName, (unsigned int)p->IfIndex, (unsigned int)p->Ipv6IfIndex);
136 // find the CattaHwInterface by index or allocate a new one
137 if((hw = catta_interface_monitor_get_hw_interface(m, idx)) == NULL) {
138 if((hw = catta_hw_interface_new(m, idx)) == NULL) {
139 catta_log_error("catta_hw_interface_new failed in ip_adapter_address");
144 // fill the CattaHwInterface struct with data
145 // notice: this code is essentially duplicated in update_hw_interface()
147 (p->OperStatus == IfOperStatusUp) &&
148 !(p->IfType == IF_TYPE_SOFTWARE_LOOPBACK) &&
149 !(p->Flags & IP_ADAPTER_NO_MULTICAST) &&
150 (m->server->config.allow_point_to_point || !(p->IfType == IF_TYPE_PPP));
151 // XXX what about IF_TYPE_TUNNEL?
153 n = wcstombs(NULL, p->FriendlyName, 0) + 1;
154 catta_free(hw->name);
155 hw->name = catta_new(char, n);
156 wcstombs(hw->name, p->FriendlyName, n);
160 hw->mac_address_size = p->PhysicalAddressLength;
161 if(hw->mac_address_size > CATTA_MAC_ADDRESS_MAX)
162 hw->mac_address_size = CATTA_MAC_ADDRESS_MAX;
163 memcpy(hw->mac_address, p->PhysicalAddress, hw->mac_address_size);
166 // XXX remove addresses that are no longer in the list
167 for(a=p->FirstUnicastAddress; a; a=a->Next)
168 ip_adapter_unicast_address(m, hw, a);
172 // place the event into the queue to be handled (by the main thread)
173 // and wake the event handler if necessary
174 static void queue_event(CattaInterfaceMonitor *m, ChangeEvent *ev)
181 if(!pthread_mutex_lock(&m->osdep.mutex)) {
183 CATTA_LLIST_APPEND(ChangeEvent, event, m->osdep.events, ev);
186 writepipe(m->osdep.pipefd[1], &c, sizeof(c));
188 pthread_mutex_unlock(&m->osdep.mutex);
190 catta_log_debug(__FILE__": queue_event: could not lock mutex");
195 // copy the given data row into an appropriate change event struct
196 static ChangeEvent *new_event(ChangeEventType type, MIB_NOTIFICATION_TYPE ntype, void *row, size_t n)
203 if(!(ev = catta_new(ChangeEvent, 1)))
207 ev->notification_type = ntype;
208 memcpy(&ev->data, row, n);
213 static void WINAPI icn_callback(void *m, MIB_IPINTERFACE_ROW *row, MIB_NOTIFICATION_TYPE type)
215 queue_event(m, new_event(INTERFACE_CHANGE_EVENT, type, row, sizeof(*row)));
218 static void WINAPI acn_callback(void *m, MIB_UNICASTIPADDRESS_ROW *row, MIB_NOTIFICATION_TYPE type)
220 queue_event(m, new_event(ADDRESS_CHANGE_EVENT, type, row, sizeof(*row)));
223 static void update_hw_interface(CattaHwInterface *hw)
228 int multicast; // synthetic flag
230 row.InterfaceLuid.Value = 0;
231 row.InterfaceIndex = hw->index;
232 if((r = GetIfEntry2(&row)) != NO_ERROR) {
233 catta_log_error("GetIfEntry2 failed for iface %d (error %u)", hw->index, (unsigned int)r);
237 // fill the CattaHwInterface struct with data
238 // notice: this code is essentially duplicated from ip_adapter()
239 // notice: not sure where to find the IP_ADAPTER_NO_MULTICAST flag from an
240 // MIB_IF_ROW2 struct, so try to deduce it otherwise
241 // cf. http://msdn.microsoft.com/en-us/windows/desktop/ff568739(v=vs.100).aspx
242 multicast = row.AccessType == NET_IF_ACCESS_BROADCAST ||
243 row.AccessType == NET_IF_ACCESS_POINT_TO_POINT;
245 (row.OperStatus == IfOperStatusUp) &&
246 !(row.Type == IF_TYPE_SOFTWARE_LOOPBACK) &&
248 (hw->monitor->server->config.allow_point_to_point || !(row.Type == IF_TYPE_PPP));
249 // XXX what about IF_TYPE_TUNNEL?
251 n = wcstombs(NULL, row.Alias, 0) + 1;
252 catta_free(hw->name);
253 hw->name = catta_new(char, n);
254 wcstombs(hw->name, row.Alias, n);
258 hw->mac_address_size = row.PhysicalAddressLength;
259 if(hw->mac_address_size > CATTA_MAC_ADDRESS_MAX)
260 hw->mac_address_size = CATTA_MAC_ADDRESS_MAX;
261 memcpy(hw->mac_address, row.PhysicalAddress, hw->mac_address_size);
263 catta_hw_interface_check_relevant(hw);
264 catta_hw_interface_update_rrs(hw, 0);
267 static void handle_iface_event(CattaInterfaceMonitor *m, MIB_IPINTERFACE_ROW *row, MIB_NOTIFICATION_TYPE type)
269 CattaIfIndex idx = row->InterfaceIndex;
270 CattaProtocol proto = catta_af_to_proto(row->Family);
271 const char *protostr = catta_proto_to_string(proto);
272 CattaInterface *iface;
273 CattaHwInterface *hw;
275 // see if we know this interface
276 iface = catta_interface_monitor_get_interface(m, idx, proto);
277 hw = iface ? iface->hardware : catta_interface_monitor_get_hw_interface(m, idx);
279 // print debug messages for some unexpected cases
280 if(type==MibParameterNotification && !iface)
281 catta_log_debug("ParameterNotification received for unknown interface %d (%s)", idx, protostr);
282 if(type==MibDeleteInstance && !iface)
283 catta_log_debug("DeleteInstance received for unknown interface %d (%s)", idx, protostr);
284 if(type==MibAddInstance && iface)
285 catta_log_debug("AddInstance received for existing interface %d (%s)", idx, protostr);
287 catta_log_debug("missing CattaHwInterface for interface %d (%s)", idx, protostr);
290 case MibParameterNotification:
292 // create the physical interface if it is missing
294 if((hw = catta_hw_interface_new(m, idx)) == NULL) {
295 catta_log_error("catta_hw_interface_new failed in handle_iface_event");
300 // create the protocol-specific interface if it is missing
302 if((iface = catta_interface_new(m, hw, proto)) == NULL) {
303 catta_log_error("catta_interface_new failed in handle_iface_event");
308 assert(iface != NULL);
310 assert(iface->hardware == hw);
312 update_hw_interface(hw);
314 case MibDeleteInstance:
316 catta_interface_free(iface, 0);
318 // free the hardware interface when there are no more protocol-specific interfaces
319 if(hw && !hw->interfaces)
320 catta_hw_interface_free(hw, 0);
323 catta_log_debug("unexpected type (%d) of interface change notification received", type);
327 static void handle_addr_event(CattaInterfaceMonitor *m, MIB_UNICASTIPADDRESS_ROW *row, MIB_NOTIFICATION_TYPE type)
329 CattaIfIndex idx = row->InterfaceIndex;
330 CattaInterfaceAddress *ifaddr;
331 CattaInterface *iface;
333 const char *protostr;
335 // fill addr struct for address lookup
336 switch(row->Address.si_family) {
338 memcpy(addr.data.data, &row->Address.Ipv4.sin_addr, sizeof(struct in_addr));
341 memcpy(addr.data.data, &row->Address.Ipv6.sin6_addr, sizeof(struct in6_addr));
344 catta_log_debug("unexpected address family on interface %d: %u", idx, row->Address.si_family);
347 addr.proto = catta_af_to_proto(row->Address.si_family);
348 protostr = catta_proto_to_string(addr.proto);
350 // see if we know this address/interface
351 iface = catta_interface_monitor_get_interface(m, idx, addr.proto);
352 ifaddr = iface ? catta_interface_monitor_get_address(m, iface, &addr) : NULL;
354 // print debug messages for some unexpected cases
355 if(type==MibParameterNotification && !ifaddr)
356 catta_log_debug("ParameterNotification received for unknown address on interface %d (%s)", idx, protostr);
357 if(type==MibDeleteInstance && !ifaddr)
358 catta_log_debug("DeleteInstance received for unknown address on interface %d (%s)", idx, protostr);
359 if(type==MibAddInstance && ifaddr)
360 catta_log_debug("AddInstance received for existing address on interface %d (%s)", idx, protostr);
362 catta_log_debug("missing CattaInterface for address on interface %d (%s)", idx, protostr);
365 case MibParameterNotification:
367 // fetch the full event data
368 if(GetUnicastIpAddressEntry(row) != NO_ERROR) {
369 catta_log_error("GetUnicastIpAddressEntry failed in handle_addr_event");
373 // skip addresses that are not suitable as source addresses
374 if(row->SkipAsSource)
377 // create the interface if it is missing
379 CattaHwInterface *hw;
381 if((hw = catta_interface_monitor_get_hw_interface(m, idx)) == NULL) {
382 catta_log_error("interface %d not found in handle_addr_event", idx);
386 if((iface = catta_interface_new(m, hw, addr.proto)) == NULL) {
387 catta_log_error("catta_interface_new failed in handle_addr_event");
391 assert(iface != NULL);
393 // create the interface-associated address if it is missing
395 unsigned prefixlen = row->OnLinkPrefixLength;
397 if((ifaddr = catta_interface_address_new(m, iface, &addr, prefixlen)) == NULL) {
398 catta_log_error("catta_interface_address_new failed in handle_addr_event");
402 assert(ifaddr != NULL);
404 set_global_scope_flag(ifaddr, &addr);
406 case MibDeleteInstance:
408 catta_interface_address_free(ifaddr);
411 catta_log_debug("unexpected type (%d) of address change notification received", type);
415 catta_interface_check_relevant(iface);
416 catta_interface_update_rrs(iface, 0);
420 static void handle_events(CattaInterfaceMonitor *m)
425 if(!pthread_mutex_lock(&m->osdep.mutex)) {
427 while(readpipe(m->osdep.pipefd[0], buf, sizeof(buf)) == sizeof(buf)) {}
429 while((ev = m->osdep.events) != NULL) {
430 CATTA_LLIST_REMOVE(ChangeEvent, event, m->osdep.events, ev);
432 // dispatch to the appropriate handler
434 case INTERFACE_CHANGE_EVENT:
435 handle_iface_event(m, &ev->data.iface, ev->notification_type);
437 case ADDRESS_CHANGE_EVENT:
438 handle_addr_event(m, &ev->data.addr, ev->notification_type);
441 catta_log_debug("unhandled change event type in handle_events");
447 pthread_mutex_unlock(&m->osdep.mutex);
451 static void pipe_callback(CattaWatch *w, int fd, CattaWatchEvent event, void *m)
453 // silence "unused parameter" warnings
462 int catta_interface_monitor_init_osdep(CattaInterfaceMonitor *m)
466 pthread_mutex_init(&m->osdep.mutex, NULL);
468 CATTA_LLIST_HEAD_INIT(ChangeEvent, m->osdep.events);
470 if(pipe(m->osdep.pipefd) < 0) {
471 catta_log_error("pipe() in catta_interface_monitor_init_osdep failed");
474 if(catta_set_nonblock(m->osdep.pipefd[0]) < 0 ||
475 catta_set_nonblock(m->osdep.pipefd[1]) < 0)
477 catta_log_error(__FILE__": catta_set_nonblock failed: %s", errnostrsocket());
481 m->osdep.icnhandle = NULL;
482 m->osdep.acnhandle = NULL;
484 // register handler for change events
485 m->osdep.watch = m->server->poll_api->watch_new(m->server->poll_api,
490 if(!m->osdep.watch) {
491 catta_log_error(__FILE__": Failed to create watch.");
495 // request async notification on interface changes
496 r = NotifyIpInterfaceChange(AF_UNSPEC,
497 // icn_callback needs to be WINAPI but
498 // MingW up to 3.1.0 erroneously defines
499 // PIPINTERFACE_CHANGE_CALLBACK without it
500 (PIPINTERFACE_CHANGE_CALLBACK)icn_callback,
501 m, FALSE, &m->osdep.icnhandle);
503 catta_log_error("NotifyIpInterfaceChange failed: %u", (unsigned int)r);
505 // request async notification on address changes
506 r = NotifyUnicastIpAddressChange(AF_UNSPEC, acn_callback, m, FALSE,
507 &m->osdep.acnhandle);
509 catta_log_error("NotifyUnicastIpAddressChange failed: %u", (unsigned int)r);
514 closesocket(m->osdep.pipefd[0]);
515 closesocket(m->osdep.pipefd[1]);
519 void catta_interface_monitor_free_osdep(CattaInterfaceMonitor *m)
523 // unregister callbacks
524 if(m->osdep.icnhandle) CancelMibChangeNotify2(m->osdep.icnhandle);
525 if(m->osdep.acnhandle) CancelMibChangeNotify2(m->osdep.acnhandle);
527 // unregister event handler
528 m->server->poll_api->watch_free(m->osdep.watch);
531 closepipe(m->osdep.pipefd[0]);
532 closepipe(m->osdep.pipefd[1]);
534 // make sure no stray events can come in during destruction
535 pthread_mutex_lock(&m->osdep.mutex);
537 // free all events that are still in the queue
538 while((ev = m->osdep.events) != NULL) {
539 CATTA_LLIST_REMOVE(ChangeEvent, event, m->osdep.events, ev);
543 pthread_mutex_unlock(&m->osdep.mutex);
544 pthread_mutex_destroy(&m->osdep.mutex);
547 void catta_interface_monitor_sync(CattaInterfaceMonitor *m)
549 IP_ADAPTER_ADDRESSES *buf = NULL;
550 IP_ADAPTER_ADDRESSES *p;
551 ULONG bufsize = 15000;
554 // allocate a buffer and call GetAdaptersAddresses
555 // retry with the correct size if the buffer was too small
557 catta_free(buf); // no-op on first iteration
558 if((buf = catta_malloc(bufsize)) == NULL) {
559 catta_log_error("malloc failed in catta_interface_monitor_sync");
563 r = GetAdaptersAddresses(AF_UNSPEC, 0, NULL, buf, &bufsize);
564 } while(r == ERROR_BUFFER_OVERFLOW);
567 catta_log_error("GetAdaptersAddresses failed: %u", (unsigned int)r);
571 // XXX remove interfaces for adapters that are no longer in the list
573 // create 'CattaInterface's for every adapter
574 for(p=buf; p; p=p->Next)
579 m->list_complete = 1;
580 catta_interface_monitor_check_relevant(m);
581 catta_interface_monitor_update_rrs(m, 0);
582 catta_log_info("Network interface enumeration completed.");