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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. */ |
9560e5b3 | 21 | static int fdb_entry_new_static( |
8c34b963 | 22 | Network *network, |
1a75764a YW |
23 | const char *filename, |
24 | unsigned section_line, | |
8c34b963 LP |
25 | FdbEntry **ret) { |
26 | ||
1a75764a | 27 | _cleanup_(network_config_section_freep) NetworkConfigSection *n = NULL; |
8e766630 | 28 | _cleanup_(fdb_entry_freep) FdbEntry *fdb_entry = NULL; |
1a75764a YW |
29 | _cleanup_free_ struct ether_addr *mac_addr = NULL; |
30 | int r; | |
b98b483b AR |
31 | |
32 | assert(network); | |
8c34b963 | 33 | assert(ret); |
1a75764a | 34 | assert(!!filename == (section_line > 0)); |
b98b483b AR |
35 | |
36 | /* search entry in hashmap first. */ | |
1a75764a YW |
37 | if (filename) { |
38 | r = network_config_section_new(filename, section_line, &n); | |
39 | if (r < 0) | |
40 | return r; | |
41 | ||
42 | fdb_entry = hashmap_get(network->fdb_entries_by_section, n); | |
b98b483b | 43 | if (fdb_entry) { |
1cc6c93a | 44 | *ret = TAKE_PTR(fdb_entry); |
b98b483b AR |
45 | |
46 | return 0; | |
47 | } | |
48 | } | |
49 | ||
8c34b963 LP |
50 | if (network->n_static_fdb_entries >= STATIC_FDB_ENTRIES_PER_NETWORK_MAX) |
51 | return -E2BIG; | |
52 | ||
b98b483b AR |
53 | /* allocate space for MAC address. */ |
54 | mac_addr = new0(struct ether_addr, 1); | |
55 | if (!mac_addr) | |
56 | return -ENOMEM; | |
57 | ||
58 | /* allocate space for and FDB entry. */ | |
1a75764a YW |
59 | fdb_entry = new(FdbEntry, 1); |
60 | if (!fdb_entry) | |
b98b483b | 61 | return -ENOMEM; |
b98b483b AR |
62 | |
63 | /* init FDB structure. */ | |
1a75764a YW |
64 | *fdb_entry = (FdbEntry) { |
65 | .network = network, | |
66 | .mac_addr = TAKE_PTR(mac_addr), | |
67 | }; | |
b98b483b AR |
68 | |
69 | LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry); | |
8c34b963 | 70 | network->n_static_fdb_entries++; |
b98b483b | 71 | |
1a75764a YW |
72 | if (filename) { |
73 | fdb_entry->section = TAKE_PTR(n); | |
74 | ||
3e570042 YW |
75 | r = hashmap_ensure_allocated(&network->fdb_entries_by_section, &network_config_hash_ops); |
76 | if (r < 0) | |
77 | return r; | |
78 | ||
1a75764a YW |
79 | r = hashmap_put(network->fdb_entries_by_section, fdb_entry->section, fdb_entry); |
80 | if (r < 0) | |
81 | return r; | |
b98b483b AR |
82 | } |
83 | ||
84 | /* return allocated FDB structure. */ | |
1cc6c93a | 85 | *ret = TAKE_PTR(fdb_entry); |
b98b483b AR |
86 | |
87 | return 0; | |
88 | } | |
89 | ||
302a796f | 90 | static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) { |
b98b483b AR |
91 | int r; |
92 | ||
ea6ec096 | 93 | assert(link); |
b98b483b | 94 | |
1c4baffc | 95 | r = sd_netlink_message_get_errno(m); |
ea6ec096 | 96 | if (r < 0 && r != -EEXIST) |
6a7a4e4d | 97 | log_link_error_errno(link, r, "Could not add FDB entry: %m"); |
b98b483b AR |
98 | |
99 | return 1; | |
100 | } | |
101 | ||
102 | /* send a request to the kernel to add a FDB entry in its static MAC table. */ | |
a60a720c | 103 | int fdb_entry_configure(Link *link, FdbEntry *fdb_entry) { |
4afd3348 | 104 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
1c4baffc | 105 | sd_netlink *rtnl; |
b98b483b | 106 | int r; |
f6bb7ac5 TJ |
107 | uint8_t flags; |
108 | Bridge *bridge; | |
b98b483b | 109 | |
ea6ec096 | 110 | assert(link); |
f6bb7ac5 | 111 | assert(link->network); |
ea6ec096 | 112 | assert(link->manager); |
b98b483b | 113 | assert(fdb_entry); |
ea6ec096 TG |
114 | |
115 | rtnl = link->manager->rtnl; | |
f6bb7ac5 | 116 | bridge = BRIDGE(link->network->bridge); |
b98b483b AR |
117 | |
118 | /* create new RTM message */ | |
ea6ec096 | 119 | r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, link->ifindex, PF_BRIDGE); |
b98b483b AR |
120 | if (r < 0) |
121 | return rtnl_log_create_error(r); | |
122 | ||
f6bb7ac5 TJ |
123 | if (bridge) |
124 | flags = NTF_MASTER; | |
125 | else | |
126 | flags = NTF_SELF; | |
127 | ||
128 | r = sd_rtnl_message_neigh_set_flags(req, flags); | |
b98b483b AR |
129 | if (r < 0) |
130 | return rtnl_log_create_error(r); | |
131 | ||
132 | /* only NUD_PERMANENT state supported. */ | |
133 | r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT); | |
134 | if (r < 0) | |
135 | return rtnl_log_create_error(r); | |
136 | ||
1c4baffc | 137 | r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr); |
b98b483b AR |
138 | if (r < 0) |
139 | return rtnl_log_create_error(r); | |
140 | ||
141 | /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */ | |
f143c650 | 142 | if (fdb_entry->vlan_id > 0) { |
1c4baffc | 143 | r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id); |
b98b483b AR |
144 | if (r < 0) |
145 | return rtnl_log_create_error(r); | |
146 | } | |
147 | ||
148 | /* send message to the kernel to update its internal static MAC table. */ | |
302a796f YW |
149 | r = netlink_call_async(rtnl, NULL, req, set_fdb_handler, |
150 | link_netlink_destroy_callback, link); | |
6a7a4e4d LP |
151 | if (r < 0) |
152 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
b98b483b | 153 | |
1046bf9b YW |
154 | link_ref(link); |
155 | ||
b98b483b AR |
156 | return 0; |
157 | } | |
158 | ||
159 | /* remove and FDB entry. */ | |
160 | void fdb_entry_free(FdbEntry *fdb_entry) { | |
9ed794a3 | 161 | if (!fdb_entry) |
b98b483b AR |
162 | return; |
163 | ||
9ed794a3 | 164 | if (fdb_entry->network) { |
8c34b963 | 165 | LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries, fdb_entry); |
8c34b963 LP |
166 | assert(fdb_entry->network->n_static_fdb_entries > 0); |
167 | fdb_entry->network->n_static_fdb_entries--; | |
b98b483b | 168 | |
8519d8f5 | 169 | if (fdb_entry->section) |
1a75764a | 170 | hashmap_remove(fdb_entry->network->fdb_entries_by_section, fdb_entry->section); |
b98b483b AR |
171 | } |
172 | ||
1a75764a | 173 | network_config_section_free(fdb_entry->section); |
b98b483b | 174 | free(fdb_entry->mac_addr); |
b98b483b AR |
175 | free(fdb_entry); |
176 | } | |
177 | ||
178 | /* parse the HW address from config files. */ | |
8519d8f5 LP |
179 | int config_parse_fdb_hwaddr( |
180 | const char *unit, | |
181 | const char *filename, | |
182 | unsigned line, | |
183 | const char *section, | |
184 | unsigned section_line, | |
185 | const char *lvalue, | |
186 | int ltype, | |
187 | const char *rvalue, | |
188 | void *data, | |
189 | void *userdata) { | |
190 | ||
b98b483b | 191 | Network *network = userdata; |
fcbf4cb7 | 192 | _cleanup_(fdb_entry_free_or_set_invalidp) FdbEntry *fdb_entry = NULL; |
b98b483b AR |
193 | int r; |
194 | ||
195 | assert(filename); | |
196 | assert(section); | |
197 | assert(lvalue); | |
198 | assert(rvalue); | |
199 | assert(data); | |
200 | ||
1a75764a | 201 | r = fdb_entry_new_static(network, filename, section_line, &fdb_entry); |
6a7a4e4d LP |
202 | if (r < 0) |
203 | return log_oom(); | |
b98b483b AR |
204 | |
205 | /* read in the MAC address for the FDB table. */ | |
206 | r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
207 | &fdb_entry->mac_addr->ether_addr_octet[0], | |
208 | &fdb_entry->mac_addr->ether_addr_octet[1], | |
209 | &fdb_entry->mac_addr->ether_addr_octet[2], | |
210 | &fdb_entry->mac_addr->ether_addr_octet[3], | |
211 | &fdb_entry->mac_addr->ether_addr_octet[4], | |
212 | &fdb_entry->mac_addr->ether_addr_octet[5]); | |
213 | ||
8627d112 | 214 | if (r != ETHER_ADDR_LEN) { |
12ca818f | 215 | log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue); |
b98b483b AR |
216 | return 0; |
217 | } | |
218 | ||
219 | fdb_entry = NULL; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | /* parse the VLAN Id from config files. */ | |
8519d8f5 LP |
225 | int config_parse_fdb_vlan_id( |
226 | const char *unit, | |
227 | const char *filename, | |
228 | unsigned line, | |
229 | const char *section, | |
230 | unsigned section_line, | |
231 | const char *lvalue, | |
232 | int ltype, | |
233 | const char *rvalue, | |
234 | void *data, | |
235 | void *userdata) { | |
236 | ||
b98b483b | 237 | Network *network = userdata; |
fcbf4cb7 | 238 | _cleanup_(fdb_entry_free_or_set_invalidp) FdbEntry *fdb_entry = NULL; |
b98b483b AR |
239 | int r; |
240 | ||
241 | assert(filename); | |
242 | assert(section); | |
243 | assert(lvalue); | |
244 | assert(rvalue); | |
245 | assert(data); | |
246 | ||
1a75764a | 247 | r = fdb_entry_new_static(network, filename, section_line, &fdb_entry); |
6a7a4e4d LP |
248 | if (r < 0) |
249 | return log_oom(); | |
b98b483b | 250 | |
0e83e7a5 TJ |
251 | r = config_parse_vlanid(unit, filename, line, section, |
252 | section_line, lvalue, ltype, | |
253 | rvalue, &fdb_entry->vlan_id, userdata); | |
6a7a4e4d | 254 | if (r < 0) |
b98b483b | 255 | return r; |
b98b483b AR |
256 | |
257 | fdb_entry = NULL; | |
258 | ||
259 | return 0; | |
260 | } |