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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
b98b483b | 2 | /*** |
810adae9 | 3 | Copyright © 2014 Intel Corporation. All rights reserved. |
b98b483b AR |
4 | ***/ |
5 | ||
b98b483b | 6 | #include <net/ethernet.h> |
cf0fbc49 | 7 | #include <net/if.h> |
b98b483b | 8 | |
b5efdb8a | 9 | #include "alloc-util.h" |
b98b483b | 10 | #include "conf-parser.h" |
23f53b99 | 11 | #include "netdev/bridge.h" |
fc2f9534 | 12 | #include "netlink-util.h" |
fc2f9534 | 13 | #include "networkd-fdb.h" |
23f53b99 | 14 | #include "networkd-manager.h" |
b5efdb8a | 15 | #include "util.h" |
0e83e7a5 | 16 | #include "vlan-util.h" |
b98b483b | 17 | |
8c34b963 LP |
18 | #define STATIC_FDB_ENTRIES_PER_NETWORK_MAX 1024U |
19 | ||
b98b483b | 20 | /* create a new FDB entry or get an existing one. */ |
8c34b963 LP |
21 | int fdb_entry_new_static( |
22 | Network *network, | |
a60a720c | 23 | unsigned section, |
8c34b963 LP |
24 | FdbEntry **ret) { |
25 | ||
8e766630 | 26 | _cleanup_(fdb_entry_freep) FdbEntry *fdb_entry = NULL; |
b98b483b AR |
27 | struct ether_addr *mac_addr = NULL; |
28 | ||
29 | assert(network); | |
8c34b963 | 30 | assert(ret); |
b98b483b AR |
31 | |
32 | /* search entry in hashmap first. */ | |
9ed794a3 | 33 | if (section) { |
b98b483b AR |
34 | fdb_entry = hashmap_get(network->fdb_entries_by_section, UINT_TO_PTR(section)); |
35 | if (fdb_entry) { | |
1cc6c93a | 36 | *ret = TAKE_PTR(fdb_entry); |
b98b483b AR |
37 | |
38 | return 0; | |
39 | } | |
40 | } | |
41 | ||
8c34b963 LP |
42 | if (network->n_static_fdb_entries >= STATIC_FDB_ENTRIES_PER_NETWORK_MAX) |
43 | return -E2BIG; | |
44 | ||
b98b483b AR |
45 | /* allocate space for MAC address. */ |
46 | mac_addr = new0(struct ether_addr, 1); | |
47 | if (!mac_addr) | |
48 | return -ENOMEM; | |
49 | ||
50 | /* allocate space for and FDB entry. */ | |
51 | fdb_entry = new0(FdbEntry, 1); | |
b98b483b AR |
52 | if (!fdb_entry) { |
53 | /* free previously allocated space for mac_addr. */ | |
54 | free(mac_addr); | |
55 | return -ENOMEM; | |
56 | } | |
57 | ||
58 | /* init FDB structure. */ | |
59 | fdb_entry->network = network; | |
60 | fdb_entry->mac_addr = mac_addr; | |
61 | ||
62 | LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry); | |
8c34b963 | 63 | network->n_static_fdb_entries++; |
b98b483b AR |
64 | |
65 | if (section) { | |
66 | fdb_entry->section = section; | |
67 | hashmap_put(network->fdb_entries_by_section, | |
68 | UINT_TO_PTR(fdb_entry->section), fdb_entry); | |
69 | } | |
70 | ||
71 | /* return allocated FDB structure. */ | |
1cc6c93a | 72 | *ret = TAKE_PTR(fdb_entry); |
b98b483b AR |
73 | |
74 | return 0; | |
75 | } | |
76 | ||
1c4baffc | 77 | static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
ea6ec096 | 78 | Link *link = userdata; |
b98b483b AR |
79 | int r; |
80 | ||
ea6ec096 | 81 | assert(link); |
b98b483b | 82 | |
1c4baffc | 83 | r = sd_netlink_message_get_errno(m); |
ea6ec096 | 84 | if (r < 0 && r != -EEXIST) |
6a7a4e4d | 85 | log_link_error_errno(link, r, "Could not add FDB entry: %m"); |
b98b483b AR |
86 | |
87 | return 1; | |
88 | } | |
89 | ||
90 | /* send a request to the kernel to add a FDB entry in its static MAC table. */ | |
a60a720c | 91 | int fdb_entry_configure(Link *link, FdbEntry *fdb_entry) { |
4afd3348 | 92 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
1c4baffc | 93 | sd_netlink *rtnl; |
b98b483b | 94 | int r; |
f6bb7ac5 TJ |
95 | uint8_t flags; |
96 | Bridge *bridge; | |
b98b483b | 97 | |
ea6ec096 | 98 | assert(link); |
f6bb7ac5 | 99 | assert(link->network); |
ea6ec096 | 100 | assert(link->manager); |
b98b483b | 101 | assert(fdb_entry); |
ea6ec096 TG |
102 | |
103 | rtnl = link->manager->rtnl; | |
f6bb7ac5 | 104 | bridge = BRIDGE(link->network->bridge); |
b98b483b AR |
105 | |
106 | /* create new RTM message */ | |
ea6ec096 | 107 | r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, link->ifindex, PF_BRIDGE); |
b98b483b AR |
108 | if (r < 0) |
109 | return rtnl_log_create_error(r); | |
110 | ||
f6bb7ac5 TJ |
111 | if (bridge) |
112 | flags = NTF_MASTER; | |
113 | else | |
114 | flags = NTF_SELF; | |
115 | ||
116 | r = sd_rtnl_message_neigh_set_flags(req, flags); | |
b98b483b AR |
117 | if (r < 0) |
118 | return rtnl_log_create_error(r); | |
119 | ||
120 | /* only NUD_PERMANENT state supported. */ | |
121 | r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT); | |
122 | if (r < 0) | |
123 | return rtnl_log_create_error(r); | |
124 | ||
1c4baffc | 125 | r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr); |
b98b483b AR |
126 | if (r < 0) |
127 | return rtnl_log_create_error(r); | |
128 | ||
129 | /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */ | |
130 | if (0 != fdb_entry->vlan_id) { | |
1c4baffc | 131 | r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id); |
b98b483b AR |
132 | if (r < 0) |
133 | return rtnl_log_create_error(r); | |
134 | } | |
135 | ||
136 | /* send message to the kernel to update its internal static MAC table. */ | |
ee38400b | 137 | r = sd_netlink_call_async(rtnl, NULL, req, set_fdb_handler, |
8190a388 | 138 | link_netlink_destroy_callback, link, 0, __func__); |
6a7a4e4d LP |
139 | if (r < 0) |
140 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
b98b483b | 141 | |
1046bf9b YW |
142 | link_ref(link); |
143 | ||
b98b483b AR |
144 | return 0; |
145 | } | |
146 | ||
147 | /* remove and FDB entry. */ | |
148 | void fdb_entry_free(FdbEntry *fdb_entry) { | |
9ed794a3 | 149 | if (!fdb_entry) |
b98b483b AR |
150 | return; |
151 | ||
9ed794a3 | 152 | if (fdb_entry->network) { |
8c34b963 LP |
153 | LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries, fdb_entry); |
154 | ||
155 | assert(fdb_entry->network->n_static_fdb_entries > 0); | |
156 | fdb_entry->network->n_static_fdb_entries--; | |
b98b483b | 157 | |
8519d8f5 | 158 | if (fdb_entry->section) |
8c34b963 | 159 | hashmap_remove(fdb_entry->network->fdb_entries_by_section, UINT_TO_PTR(fdb_entry->section)); |
b98b483b AR |
160 | } |
161 | ||
162 | free(fdb_entry->mac_addr); | |
163 | ||
164 | free(fdb_entry); | |
165 | } | |
166 | ||
167 | /* parse the HW address from config files. */ | |
8519d8f5 LP |
168 | int config_parse_fdb_hwaddr( |
169 | const char *unit, | |
170 | const char *filename, | |
171 | unsigned line, | |
172 | const char *section, | |
173 | unsigned section_line, | |
174 | const char *lvalue, | |
175 | int ltype, | |
176 | const char *rvalue, | |
177 | void *data, | |
178 | void *userdata) { | |
179 | ||
b98b483b | 180 | Network *network = userdata; |
8e766630 | 181 | _cleanup_(fdb_entry_freep) FdbEntry *fdb_entry = NULL; |
b98b483b AR |
182 | int r; |
183 | ||
184 | assert(filename); | |
185 | assert(section); | |
186 | assert(lvalue); | |
187 | assert(rvalue); | |
188 | assert(data); | |
189 | ||
190 | r = fdb_entry_new_static(network, section_line, &fdb_entry); | |
6a7a4e4d LP |
191 | if (r < 0) |
192 | return log_oom(); | |
b98b483b AR |
193 | |
194 | /* read in the MAC address for the FDB table. */ | |
195 | r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
196 | &fdb_entry->mac_addr->ether_addr_octet[0], | |
197 | &fdb_entry->mac_addr->ether_addr_octet[1], | |
198 | &fdb_entry->mac_addr->ether_addr_octet[2], | |
199 | &fdb_entry->mac_addr->ether_addr_octet[3], | |
200 | &fdb_entry->mac_addr->ether_addr_octet[4], | |
201 | &fdb_entry->mac_addr->ether_addr_octet[5]); | |
202 | ||
8627d112 | 203 | if (r != ETHER_ADDR_LEN) { |
12ca818f | 204 | log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue); |
b98b483b AR |
205 | return 0; |
206 | } | |
207 | ||
208 | fdb_entry = NULL; | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
213 | /* parse the VLAN Id from config files. */ | |
8519d8f5 LP |
214 | int config_parse_fdb_vlan_id( |
215 | const char *unit, | |
216 | const char *filename, | |
217 | unsigned line, | |
218 | const char *section, | |
219 | unsigned section_line, | |
220 | const char *lvalue, | |
221 | int ltype, | |
222 | const char *rvalue, | |
223 | void *data, | |
224 | void *userdata) { | |
225 | ||
b98b483b | 226 | Network *network = userdata; |
8e766630 | 227 | _cleanup_(fdb_entry_freep) FdbEntry *fdb_entry = NULL; |
b98b483b AR |
228 | int r; |
229 | ||
230 | assert(filename); | |
231 | assert(section); | |
232 | assert(lvalue); | |
233 | assert(rvalue); | |
234 | assert(data); | |
235 | ||
236 | r = fdb_entry_new_static(network, section_line, &fdb_entry); | |
6a7a4e4d LP |
237 | if (r < 0) |
238 | return log_oom(); | |
b98b483b | 239 | |
0e83e7a5 TJ |
240 | r = config_parse_vlanid(unit, filename, line, section, |
241 | section_line, lvalue, ltype, | |
242 | rvalue, &fdb_entry->vlan_id, userdata); | |
6a7a4e4d | 243 | if (r < 0) |
b98b483b | 244 | return r; |
b98b483b AR |
245 | |
246 | fdb_entry = NULL; | |
247 | ||
248 | return 0; | |
249 | } |