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078eedf4 | 1 | /* |
0a2869d5 | 2 | * Copyright (c) 2014, 2016 VMware, Inc. |
078eedf4 NR |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <stdlib.h> | |
18 | #include <config.h> | |
19 | #include <errno.h> | |
694ebbc8 | 20 | #include <iphlpapi.h> |
078eedf4 NR |
21 | |
22 | #include <net/if.h> | |
23 | ||
24 | #include "coverage.h" | |
25 | #include "fatal-signal.h" | |
26 | #include "netdev-provider.h" | |
64c96779 | 27 | #include "openvswitch/ofpbuf.h" |
3bd0fd39 | 28 | #include "packets.h" |
078eedf4 | 29 | #include "poll-loop.h" |
ee89ea7b | 30 | #include "openvswitch/shash.h" |
078eedf4 | 31 | #include "svec.h" |
e6211adc | 32 | #include "openvswitch/vlog.h" |
078eedf4 NR |
33 | #include "odp-netlink.h" |
34 | #include "netlink-socket.h" | |
35 | #include "netlink.h" | |
36 | ||
37 | VLOG_DEFINE_THIS_MODULE(netdev_windows); | |
38 | static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5); | |
39 | ||
40 | enum { | |
41 | VALID_ETHERADDR = 1 << 0, | |
42 | VALID_MTU = 1 << 1, | |
43 | VALID_IFFLAG = 1 << 5, | |
44 | }; | |
45 | ||
46 | /* Caches the information of a netdev. */ | |
47 | struct netdev_windows { | |
48 | struct netdev up; | |
49 | int32_t dev_type; | |
50 | uint32_t port_no; | |
51 | ||
52 | unsigned int change_seq; | |
53 | ||
54 | unsigned int cache_valid; | |
55 | int ifindex; | |
74ff3298 | 56 | struct eth_addr mac; |
078eedf4 NR |
57 | uint32_t mtu; |
58 | unsigned int ifi_flags; | |
59 | }; | |
60 | ||
61 | /* Utility structure for netdev commands. */ | |
62 | struct netdev_windows_netdev_info { | |
63 | /* Generic Netlink header. */ | |
64 | uint8_t cmd; | |
65 | ||
66 | /* Information that is relevant to ovs. */ | |
67 | uint32_t dp_ifindex; | |
68 | uint32_t port_no; | |
69 | uint32_t ovs_type; | |
70 | ||
71 | /* General information of a network device. */ | |
72 | const char *name; | |
74ff3298 | 73 | struct eth_addr mac_address; |
078eedf4 NR |
74 | uint32_t mtu; |
75 | uint32_t ifi_flags; | |
76 | }; | |
77 | ||
3e648bc5 NR |
78 | static int query_netdev(const char *devname, |
79 | struct netdev_windows_netdev_info *reply, | |
80 | struct ofpbuf **bufp); | |
0bfecde1 NR |
81 | static struct netdev *netdev_windows_alloc(void); |
82 | static int netdev_windows_init_(void); | |
3e648bc5 NR |
83 | |
84 | /* Generic Netlink family numbers for OVS. | |
85 | * | |
0bfecde1 | 86 | * Initialized by netdev_windows_init_(). */ |
3e648bc5 NR |
87 | static int ovs_win_netdev_family; |
88 | struct nl_sock *ovs_win_netdev_sock; | |
89 | ||
90 | ||
91 | static bool | |
92 | is_netdev_windows_class(const struct netdev_class *netdev_class) | |
93 | { | |
0bfecde1 | 94 | return netdev_class->alloc == netdev_windows_alloc; |
3e648bc5 NR |
95 | } |
96 | ||
97 | static struct netdev_windows * | |
98 | netdev_windows_cast(const struct netdev *netdev_) | |
99 | { | |
100 | ovs_assert(is_netdev_windows_class(netdev_get_class(netdev_))); | |
101 | return CONTAINER_OF(netdev_, struct netdev_windows, up); | |
102 | } | |
103 | ||
078eedf4 | 104 | static int |
0bfecde1 | 105 | netdev_windows_init_(void) |
078eedf4 | 106 | { |
3e648bc5 NR |
107 | int error = 0; |
108 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
109 | ||
110 | if (ovsthread_once_start(&once)) { | |
111 | error = nl_lookup_genl_family(OVS_WIN_NETDEV_FAMILY, | |
112 | &ovs_win_netdev_family); | |
113 | if (error) { | |
114 | VLOG_ERR("Generic Netlink family '%s' does not exist. " | |
115 | "The Open vSwitch kernel module is probably not loaded.", | |
116 | OVS_WIN_NETDEV_FAMILY); | |
117 | } | |
118 | if (!error) { | |
119 | /* XXX: Where to close this socket? */ | |
120 | error = nl_sock_create(NETLINK_GENERIC, &ovs_win_netdev_sock); | |
121 | } | |
122 | ||
123 | ovsthread_once_done(&once); | |
124 | } | |
125 | ||
126 | return error; | |
078eedf4 NR |
127 | } |
128 | ||
129 | static struct netdev * | |
130 | netdev_windows_alloc(void) | |
131 | { | |
3e648bc5 NR |
132 | struct netdev_windows *netdev = xzalloc(sizeof *netdev); |
133 | return netdev ? &netdev->up : NULL; | |
078eedf4 NR |
134 | } |
135 | ||
ee4dac3b NR |
136 | static uint32_t |
137 | dp_to_netdev_ifi_flags(uint32_t dp_flags) | |
138 | { | |
139 | uint32_t nd_flags = 0; | |
140 | ||
fa41c89c | 141 | if (dp_flags & OVS_WIN_NETDEV_IFF_UP) { |
ee4dac3b NR |
142 | nd_flags |= NETDEV_UP; |
143 | } | |
144 | ||
fa41c89c | 145 | if (dp_flags & OVS_WIN_NETDEV_IFF_PROMISC) { |
ee4dac3b NR |
146 | nd_flags |= NETDEV_PROMISC; |
147 | } | |
148 | ||
149 | return nd_flags; | |
150 | } | |
151 | ||
078eedf4 NR |
152 | static int |
153 | netdev_windows_system_construct(struct netdev *netdev_) | |
154 | { | |
3e648bc5 | 155 | struct netdev_windows *netdev = netdev_windows_cast(netdev_); |
3e648bc5 NR |
156 | struct netdev_windows_netdev_info info; |
157 | struct ofpbuf *buf; | |
158 | int ret; | |
159 | ||
160 | /* Query the attributes and runtime status of the netdev. */ | |
161 | ret = query_netdev(netdev_get_name(&netdev->up), &info, &buf); | |
162 | if (ret) { | |
163 | return ret; | |
164 | } | |
165 | ofpbuf_delete(buf); | |
166 | ||
167 | netdev->change_seq = 1; | |
168 | netdev->dev_type = info.ovs_type; | |
169 | netdev->port_no = info.port_no; | |
170 | ||
74ff3298 | 171 | netdev->mac = info.mac_address; |
3e648bc5 NR |
172 | netdev->cache_valid = VALID_ETHERADDR; |
173 | netdev->ifindex = -EOPNOTSUPP; | |
174 | ||
175 | netdev->mtu = info.mtu; | |
176 | netdev->cache_valid |= VALID_MTU; | |
177 | ||
ee4dac3b | 178 | netdev->ifi_flags = dp_to_netdev_ifi_flags(info.ifi_flags); |
3e648bc5 NR |
179 | netdev->cache_valid |= VALID_IFFLAG; |
180 | ||
181 | VLOG_DBG("construct device %s, ovs_type: %u.", | |
182 | netdev_get_name(&netdev->up), info.ovs_type); | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static int | |
187 | netdev_windows_netdev_to_ofpbuf(struct netdev_windows_netdev_info *info, | |
188 | struct ofpbuf *buf) | |
189 | { | |
190 | struct ovs_header *ovs_header; | |
191 | int error = EINVAL; | |
192 | ||
193 | nl_msg_put_genlmsghdr(buf, 0, ovs_win_netdev_family, | |
194 | NLM_F_REQUEST | NLM_F_ECHO, | |
195 | info->cmd, OVS_WIN_NETDEV_VERSION); | |
196 | ||
197 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); | |
198 | ovs_header->dp_ifindex = info->dp_ifindex; | |
199 | ||
200 | if (info->name) { | |
201 | nl_msg_put_string(buf, OVS_WIN_NETDEV_ATTR_NAME, info->name); | |
202 | error = 0; | |
203 | } | |
204 | ||
205 | return error; | |
206 | } | |
207 | ||
208 | static void | |
209 | netdev_windows_info_init(struct netdev_windows_netdev_info *info) | |
210 | { | |
211 | memset(info, 0, sizeof *info); | |
212 | } | |
213 | ||
214 | static int | |
215 | netdev_windows_netdev_from_ofpbuf(struct netdev_windows_netdev_info *info, | |
216 | struct ofpbuf *buf) | |
217 | { | |
218 | static const struct nl_policy ovs_netdev_policy[] = { | |
219 | [OVS_WIN_NETDEV_ATTR_PORT_NO] = { .type = NL_A_U32 }, | |
220 | [OVS_WIN_NETDEV_ATTR_TYPE] = { .type = NL_A_U32 }, | |
221 | [OVS_WIN_NETDEV_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
222 | [OVS_WIN_NETDEV_ATTR_MAC_ADDR] = { NL_POLICY_FOR(info->mac_address) }, | |
223 | [OVS_WIN_NETDEV_ATTR_MTU] = { .type = NL_A_U32 }, | |
224 | [OVS_WIN_NETDEV_ATTR_IF_FLAGS] = { .type = NL_A_U32 }, | |
225 | }; | |
226 | ||
3e648bc5 NR |
227 | netdev_windows_info_init(info); |
228 | ||
583d3467 | 229 | struct ofpbuf b = ofpbuf_const_initializer(buf->data, buf->size); |
0a2869d5 BP |
230 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); |
231 | struct genlmsghdr *genl = ofpbuf_try_pull(&b, sizeof *genl); | |
232 | struct ovs_header *ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); | |
233 | ||
234 | struct nlattr *a[ARRAY_SIZE(ovs_netdev_policy)]; | |
3e648bc5 NR |
235 | if (!nlmsg || !genl || !ovs_header |
236 | || nlmsg->nlmsg_type != ovs_win_netdev_family | |
237 | || !nl_policy_parse(&b, 0, ovs_netdev_policy, a, | |
238 | ARRAY_SIZE(ovs_netdev_policy))) { | |
239 | return EINVAL; | |
240 | } | |
241 | ||
242 | info->cmd = genl->cmd; | |
243 | info->dp_ifindex = ovs_header->dp_ifindex; | |
244 | info->port_no = nl_attr_get_odp_port(a[OVS_WIN_NETDEV_ATTR_PORT_NO]); | |
245 | info->ovs_type = nl_attr_get_u32(a[OVS_WIN_NETDEV_ATTR_TYPE]); | |
246 | info->name = nl_attr_get_string(a[OVS_WIN_NETDEV_ATTR_NAME]); | |
ef901b35 | 247 | memcpy(&info->mac_address, nl_attr_get_unspec(a[OVS_WIN_NETDEV_ATTR_MAC_ADDR], |
ee4dac3b | 248 | sizeof(info->mac_address)), sizeof(info->mac_address)); |
3e648bc5 NR |
249 | info->mtu = nl_attr_get_u32(a[OVS_WIN_NETDEV_ATTR_MTU]); |
250 | info->ifi_flags = nl_attr_get_u32(a[OVS_WIN_NETDEV_ATTR_IF_FLAGS]); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
255 | static int | |
256 | query_netdev(const char *devname, | |
257 | struct netdev_windows_netdev_info *info, | |
258 | struct ofpbuf **bufp) | |
259 | { | |
260 | int error = 0; | |
261 | struct ofpbuf *request_buf; | |
262 | ||
263 | ovs_assert(info != NULL); | |
264 | netdev_windows_info_init(info); | |
265 | ||
0bfecde1 | 266 | error = netdev_windows_init_(); |
3e648bc5 NR |
267 | if (error) { |
268 | if (info) { | |
269 | *bufp = NULL; | |
270 | netdev_windows_info_init(info); | |
271 | } | |
272 | return error; | |
273 | } | |
274 | ||
275 | request_buf = ofpbuf_new(1024); | |
276 | info->cmd = OVS_WIN_NETDEV_CMD_GET; | |
277 | info->name = devname; | |
278 | error = netdev_windows_netdev_to_ofpbuf(info, request_buf); | |
279 | if (error) { | |
280 | ofpbuf_delete(request_buf); | |
281 | return error; | |
282 | } | |
283 | ||
284 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); | |
285 | ofpbuf_delete(request_buf); | |
286 | ||
287 | if (info) { | |
288 | if (!error) { | |
289 | error = netdev_windows_netdev_from_ofpbuf(info, *bufp); | |
290 | } | |
291 | if (error) { | |
292 | netdev_windows_info_init(info); | |
293 | ofpbuf_delete(*bufp); | |
294 | *bufp = NULL; | |
295 | } | |
296 | } | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | static void | |
302 | netdev_windows_destruct(struct netdev *netdev_) | |
303 | { | |
304 | ||
078eedf4 NR |
305 | } |
306 | ||
307 | static void | |
308 | netdev_windows_dealloc(struct netdev *netdev_) | |
309 | { | |
3e648bc5 NR |
310 | struct netdev_windows *netdev = netdev_windows_cast(netdev_); |
311 | free(netdev); | |
078eedf4 NR |
312 | } |
313 | ||
314 | static int | |
3bd0fd39 | 315 | netdev_windows_get_etheraddr(const struct netdev *netdev_, |
74ff3298 | 316 | struct eth_addr *mac) |
078eedf4 | 317 | { |
3e648bc5 NR |
318 | struct netdev_windows *netdev = netdev_windows_cast(netdev_); |
319 | ||
320 | ovs_assert((netdev->cache_valid & VALID_ETHERADDR) != 0); | |
321 | if (netdev->cache_valid & VALID_ETHERADDR) { | |
74ff3298 | 322 | *mac = netdev->mac; |
3e648bc5 NR |
323 | } else { |
324 | return EINVAL; | |
325 | } | |
326 | return 0; | |
078eedf4 NR |
327 | } |
328 | ||
329 | static int | |
330 | netdev_windows_get_mtu(const struct netdev *netdev_, int *mtup) | |
331 | { | |
3e648bc5 NR |
332 | struct netdev_windows *netdev = netdev_windows_cast(netdev_); |
333 | ||
334 | ovs_assert((netdev->cache_valid & VALID_MTU) != 0); | |
335 | if (netdev->cache_valid & VALID_MTU) { | |
336 | *mtup = netdev->mtu; | |
337 | } else { | |
338 | return EINVAL; | |
339 | } | |
340 | return 0; | |
078eedf4 | 341 | } |
6cac056e AS |
342 | |
343 | /* This functionality is not really required by the datapath. | |
344 | * But vswitchd bringup expects this to be implemented. */ | |
345 | static int | |
3bd0fd39 | 346 | netdev_windows_set_etheraddr(const struct netdev *netdev_, |
74ff3298 | 347 | const struct eth_addr mac) |
6cac056e AS |
348 | { |
349 | return 0; | |
350 | } | |
351 | ||
6cac056e AS |
352 | /* This functionality is not really required by the datapath. |
353 | * But vswitchd bringup expects this to be implemented. */ | |
354 | static int | |
ee4dac3b NR |
355 | netdev_windows_update_flags(struct netdev *netdev_, |
356 | enum netdev_flags off, | |
357 | enum netdev_flags on, | |
358 | enum netdev_flags *old_flagsp) | |
6cac056e | 359 | { |
ee4dac3b NR |
360 | struct netdev_windows *netdev = netdev_windows_cast(netdev_); |
361 | ||
362 | ovs_assert((netdev->cache_valid & VALID_IFFLAG) != 0); | |
363 | if (netdev->cache_valid & VALID_IFFLAG) { | |
364 | *old_flagsp = netdev->ifi_flags; | |
365 | /* Setting the interface flags is not supported. */ | |
366 | } else { | |
367 | return EINVAL; | |
368 | } | |
6cac056e AS |
369 | return 0; |
370 | } | |
371 | ||
694ebbc8 AS |
372 | /* Looks up in the ARP table entry for a given 'ip'. If it is found, the |
373 | * corresponding MAC address will be copied in 'mac' and return 0. If no | |
374 | * matching entry is found or an error occurs it will log it and return ENXIO. | |
375 | */ | |
376 | static int | |
377 | netdev_windows_arp_lookup(const struct netdev *netdev, | |
74ff3298 | 378 | ovs_be32 ip, struct eth_addr *mac) |
694ebbc8 AS |
379 | { |
380 | PMIB_IPNETTABLE arp_table = NULL; | |
381 | /* The buffer length of all ARP entries */ | |
382 | uint32_t buffer_length = 0; | |
383 | uint32_t ret_val = 0; | |
384 | uint32_t counter = 0; | |
385 | ||
386 | ret_val = GetIpNetTable(arp_table, &buffer_length, false); | |
387 | ||
388 | if (ret_val != ERROR_INSUFFICIENT_BUFFER ) { | |
389 | VLOG_ERR("Call to GetIpNetTable failed with error: %s", | |
390 | ovs_format_message(ret_val)); | |
391 | return ENXIO; | |
392 | } | |
393 | ||
394 | arp_table = (MIB_IPNETTABLE *) malloc(buffer_length); | |
395 | ||
396 | if (arp_table == NULL) { | |
397 | VLOG_ERR("Could not allocate memory for all the interfaces"); | |
398 | return ENXIO; | |
399 | } | |
400 | ||
401 | ret_val = GetIpNetTable(arp_table, &buffer_length, false); | |
402 | ||
403 | if (ret_val == NO_ERROR) { | |
404 | for (counter = 0; counter < arp_table->dwNumEntries; counter++) { | |
405 | if (arp_table->table[counter].dwAddr == ip) { | |
406 | memcpy(mac, arp_table->table[counter].bPhysAddr, ETH_ADDR_LEN); | |
407 | ||
408 | free(arp_table); | |
409 | return 0; | |
410 | } | |
411 | } | |
412 | } else { | |
413 | VLOG_ERR("Call to GetIpNetTable failed with error: %s", | |
414 | ovs_format_message(ret_val)); | |
415 | } | |
416 | ||
417 | free(arp_table); | |
418 | return ENXIO; | |
419 | } | |
420 | ||
421 | static int | |
422 | netdev_windows_get_next_hop(const struct in_addr *host, | |
423 | struct in_addr *next_hop, | |
424 | char **netdev_name) | |
425 | { | |
426 | uint32_t ret_val = 0; | |
427 | /* The buffer length of all addresses */ | |
e83cb658 | 428 | uint32_t buffer_length = 0; |
694ebbc8 AS |
429 | PIP_ADAPTER_ADDRESSES all_addr = NULL; |
430 | PIP_ADAPTER_ADDRESSES cur_addr = NULL; | |
431 | ||
432 | ret_val = GetAdaptersAddresses(AF_INET, | |
433 | GAA_FLAG_INCLUDE_PREFIX | | |
434 | GAA_FLAG_INCLUDE_GATEWAYS, | |
e83cb658 | 435 | NULL, NULL, &buffer_length); |
694ebbc8 | 436 | |
e83cb658 | 437 | if (ret_val != ERROR_BUFFER_OVERFLOW ) { |
694ebbc8 AS |
438 | VLOG_ERR("Call to GetAdaptersAddresses failed with error: %s", |
439 | ovs_format_message(ret_val)); | |
440 | return ENXIO; | |
441 | } | |
442 | ||
443 | all_addr = (IP_ADAPTER_ADDRESSES *) malloc(buffer_length); | |
444 | ||
445 | if (all_addr == NULL) { | |
446 | VLOG_ERR("Could not allocate memory for all the interfaces"); | |
447 | return ENXIO; | |
448 | } | |
449 | ||
450 | ret_val = GetAdaptersAddresses(AF_INET, | |
451 | GAA_FLAG_INCLUDE_PREFIX | | |
452 | GAA_FLAG_INCLUDE_GATEWAYS, | |
453 | NULL, all_addr, &buffer_length); | |
454 | ||
455 | if (ret_val == NO_ERROR) { | |
456 | cur_addr = all_addr; | |
457 | while (cur_addr) { | |
458 | if(cur_addr->FirstGatewayAddress && | |
459 | cur_addr->FirstGatewayAddress->Address.lpSockaddr) { | |
460 | struct sockaddr_in *ipv4 = (struct sockaddr_in *) | |
461 | cur_addr->FirstGatewayAddress->Address.lpSockaddr; | |
462 | next_hop->s_addr = ipv4->sin_addr.S_un.S_addr; | |
463 | *netdev_name = xstrdup((char *)cur_addr->FriendlyName); | |
464 | ||
465 | free(all_addr); | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | cur_addr = cur_addr->Next; | |
471 | } | |
472 | } else { | |
473 | VLOG_ERR("Call to GetAdaptersAddresses failed with error: %s", | |
474 | ovs_format_message(ret_val)); | |
475 | } | |
476 | ||
477 | if (all_addr) { | |
478 | free(all_addr); | |
479 | } | |
480 | return ENXIO; | |
481 | } | |
482 | ||
078eedf4 NR |
483 | static int |
484 | netdev_windows_internal_construct(struct netdev *netdev_) | |
485 | { | |
486 | return netdev_windows_system_construct(netdev_); | |
487 | } | |
488 | ||
489 | ||
490 | #define NETDEV_WINDOWS_CLASS(NAME, CONSTRUCT) \ | |
491 | { \ | |
492 | .type = NAME, \ | |
118c77b1 | 493 | .is_pmd = false, \ |
078eedf4 NR |
494 | .alloc = netdev_windows_alloc, \ |
495 | .construct = CONSTRUCT, \ | |
3e648bc5 | 496 | .destruct = netdev_windows_destruct, \ |
078eedf4 NR |
497 | .dealloc = netdev_windows_dealloc, \ |
498 | .get_etheraddr = netdev_windows_get_etheraddr, \ | |
6cac056e | 499 | .set_etheraddr = netdev_windows_set_etheraddr, \ |
ee4dac3b | 500 | .update_flags = netdev_windows_update_flags, \ |
694ebbc8 AS |
501 | .get_next_hop = netdev_windows_get_next_hop, \ |
502 | .arp_lookup = netdev_windows_arp_lookup, \ | |
078eedf4 NR |
503 | } |
504 | ||
505 | const struct netdev_class netdev_windows_class = | |
506 | NETDEV_WINDOWS_CLASS( | |
507 | "system", | |
508 | netdev_windows_system_construct); | |
509 | ||
510 | const struct netdev_class netdev_internal_class = | |
511 | NETDEV_WINDOWS_CLASS( | |
512 | "internal", | |
513 | netdev_windows_internal_construct); |