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b98b483b AR |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright (C) 2014 Intel Corporation. All rights reserved. | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
b98b483b | 20 | #include <net/ethernet.h> |
cf0fbc49 | 21 | #include <net/if.h> |
b98b483b | 22 | |
b5efdb8a | 23 | #include "alloc-util.h" |
b98b483b | 24 | #include "conf-parser.h" |
fc2f9534 | 25 | #include "netlink-util.h" |
fc2f9534 | 26 | #include "networkd-fdb.h" |
b5efdb8a LP |
27 | #include "networkd.h" |
28 | #include "util.h" | |
b98b483b AR |
29 | |
30 | /* create a new FDB entry or get an existing one. */ | |
31 | int fdb_entry_new_static(Network *const network, | |
32 | const unsigned section, | |
33 | FdbEntry **ret) { | |
34 | _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL; | |
35 | struct ether_addr *mac_addr = NULL; | |
36 | ||
37 | assert(network); | |
38 | ||
39 | /* search entry in hashmap first. */ | |
9ed794a3 | 40 | if (section) { |
b98b483b AR |
41 | fdb_entry = hashmap_get(network->fdb_entries_by_section, UINT_TO_PTR(section)); |
42 | if (fdb_entry) { | |
43 | *ret = fdb_entry; | |
44 | fdb_entry = NULL; | |
45 | ||
46 | return 0; | |
47 | } | |
48 | } | |
49 | ||
50 | /* allocate space for MAC address. */ | |
51 | mac_addr = new0(struct ether_addr, 1); | |
52 | if (!mac_addr) | |
53 | return -ENOMEM; | |
54 | ||
55 | /* allocate space for and FDB entry. */ | |
56 | fdb_entry = new0(FdbEntry, 1); | |
57 | ||
58 | if (!fdb_entry) { | |
59 | /* free previously allocated space for mac_addr. */ | |
60 | free(mac_addr); | |
61 | return -ENOMEM; | |
62 | } | |
63 | ||
64 | /* init FDB structure. */ | |
65 | fdb_entry->network = network; | |
66 | fdb_entry->mac_addr = mac_addr; | |
67 | ||
68 | LIST_PREPEND(static_fdb_entries, network->static_fdb_entries, fdb_entry); | |
69 | ||
70 | if (section) { | |
71 | fdb_entry->section = section; | |
72 | hashmap_put(network->fdb_entries_by_section, | |
73 | UINT_TO_PTR(fdb_entry->section), fdb_entry); | |
74 | } | |
75 | ||
76 | /* return allocated FDB structure. */ | |
77 | *ret = fdb_entry; | |
78 | fdb_entry = NULL; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
1c4baffc | 83 | static int set_fdb_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) { |
ea6ec096 | 84 | Link *link = userdata; |
b98b483b AR |
85 | int r; |
86 | ||
ea6ec096 | 87 | assert(link); |
b98b483b | 88 | |
1c4baffc | 89 | r = sd_netlink_message_get_errno(m); |
ea6ec096 | 90 | if (r < 0 && r != -EEXIST) |
6a7a4e4d | 91 | log_link_error_errno(link, r, "Could not add FDB entry: %m"); |
b98b483b AR |
92 | |
93 | return 1; | |
94 | } | |
95 | ||
96 | /* send a request to the kernel to add a FDB entry in its static MAC table. */ | |
a245ced0 | 97 | int fdb_entry_configure(Link *const link, FdbEntry *const fdb_entry) { |
4afd3348 | 98 | _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL; |
1c4baffc | 99 | sd_netlink *rtnl; |
b98b483b AR |
100 | int r; |
101 | ||
ea6ec096 TG |
102 | assert(link); |
103 | assert(link->manager); | |
b98b483b | 104 | assert(fdb_entry); |
ea6ec096 TG |
105 | |
106 | rtnl = link->manager->rtnl; | |
b98b483b AR |
107 | |
108 | /* create new RTM message */ | |
ea6ec096 | 109 | r = sd_rtnl_message_new_neigh(rtnl, &req, RTM_NEWNEIGH, link->ifindex, PF_BRIDGE); |
b98b483b AR |
110 | if (r < 0) |
111 | return rtnl_log_create_error(r); | |
112 | ||
113 | /* only NTF_SELF flag supported. */ | |
114 | r = sd_rtnl_message_neigh_set_flags(req, NTF_SELF); | |
115 | if (r < 0) | |
116 | return rtnl_log_create_error(r); | |
117 | ||
118 | /* only NUD_PERMANENT state supported. */ | |
119 | r = sd_rtnl_message_neigh_set_state(req, NUD_NOARP | NUD_PERMANENT); | |
120 | if (r < 0) | |
121 | return rtnl_log_create_error(r); | |
122 | ||
1c4baffc | 123 | r = sd_netlink_message_append_ether_addr(req, NDA_LLADDR, fdb_entry->mac_addr); |
b98b483b AR |
124 | if (r < 0) |
125 | return rtnl_log_create_error(r); | |
126 | ||
127 | /* VLAN Id is optional. We'll add VLAN Id only if it's specified. */ | |
128 | if (0 != fdb_entry->vlan_id) { | |
1c4baffc | 129 | r = sd_netlink_message_append_u16(req, NDA_VLAN, fdb_entry->vlan_id); |
b98b483b AR |
130 | if (r < 0) |
131 | return rtnl_log_create_error(r); | |
132 | } | |
133 | ||
134 | /* send message to the kernel to update its internal static MAC table. */ | |
1c4baffc | 135 | r = sd_netlink_call_async(rtnl, req, set_fdb_handler, link, 0, NULL); |
6a7a4e4d LP |
136 | if (r < 0) |
137 | return log_link_error_errno(link, r, "Could not send rtnetlink message: %m"); | |
b98b483b AR |
138 | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* remove and FDB entry. */ | |
143 | void fdb_entry_free(FdbEntry *fdb_entry) { | |
9ed794a3 | 144 | if (!fdb_entry) |
b98b483b AR |
145 | return; |
146 | ||
9ed794a3 | 147 | if (fdb_entry->network) { |
b98b483b AR |
148 | LIST_REMOVE(static_fdb_entries, fdb_entry->network->static_fdb_entries, |
149 | fdb_entry); | |
150 | ||
8519d8f5 LP |
151 | if (fdb_entry->section) |
152 | hashmap_remove(fdb_entry->network->fdb_entries_by_section, | |
153 | UINT_TO_PTR(fdb_entry->section)); | |
b98b483b AR |
154 | } |
155 | ||
156 | free(fdb_entry->mac_addr); | |
157 | ||
158 | free(fdb_entry); | |
159 | } | |
160 | ||
161 | /* parse the HW address from config files. */ | |
8519d8f5 LP |
162 | int config_parse_fdb_hwaddr( |
163 | const char *unit, | |
164 | const char *filename, | |
165 | unsigned line, | |
166 | const char *section, | |
167 | unsigned section_line, | |
168 | const char *lvalue, | |
169 | int ltype, | |
170 | const char *rvalue, | |
171 | void *data, | |
172 | void *userdata) { | |
173 | ||
b98b483b AR |
174 | Network *network = userdata; |
175 | _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL; | |
176 | int r; | |
177 | ||
178 | assert(filename); | |
179 | assert(section); | |
180 | assert(lvalue); | |
181 | assert(rvalue); | |
182 | assert(data); | |
183 | ||
184 | r = fdb_entry_new_static(network, section_line, &fdb_entry); | |
6a7a4e4d LP |
185 | if (r < 0) |
186 | return log_oom(); | |
b98b483b AR |
187 | |
188 | /* read in the MAC address for the FDB table. */ | |
189 | r = sscanf(rvalue, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx", | |
190 | &fdb_entry->mac_addr->ether_addr_octet[0], | |
191 | &fdb_entry->mac_addr->ether_addr_octet[1], | |
192 | &fdb_entry->mac_addr->ether_addr_octet[2], | |
193 | &fdb_entry->mac_addr->ether_addr_octet[3], | |
194 | &fdb_entry->mac_addr->ether_addr_octet[4], | |
195 | &fdb_entry->mac_addr->ether_addr_octet[5]); | |
196 | ||
8519d8f5 | 197 | if (ETHER_ADDR_LEN != r) { |
12ca818f | 198 | log_syntax(unit, LOG_ERR, filename, line, 0, "Not a valid MAC address, ignoring assignment: %s", rvalue); |
b98b483b AR |
199 | return 0; |
200 | } | |
201 | ||
202 | fdb_entry = NULL; | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | /* parse the VLAN Id from config files. */ | |
8519d8f5 LP |
208 | int config_parse_fdb_vlan_id( |
209 | const char *unit, | |
210 | const char *filename, | |
211 | unsigned line, | |
212 | const char *section, | |
213 | unsigned section_line, | |
214 | const char *lvalue, | |
215 | int ltype, | |
216 | const char *rvalue, | |
217 | void *data, | |
218 | void *userdata) { | |
219 | ||
b98b483b AR |
220 | Network *network = userdata; |
221 | _cleanup_fdbentry_free_ FdbEntry *fdb_entry = NULL; | |
222 | int r; | |
223 | ||
224 | assert(filename); | |
225 | assert(section); | |
226 | assert(lvalue); | |
227 | assert(rvalue); | |
228 | assert(data); | |
229 | ||
230 | r = fdb_entry_new_static(network, section_line, &fdb_entry); | |
6a7a4e4d LP |
231 | if (r < 0) |
232 | return log_oom(); | |
b98b483b AR |
233 | |
234 | r = config_parse_unsigned(unit, filename, line, section, | |
235 | section_line, lvalue, ltype, | |
236 | rvalue, &fdb_entry->vlan_id, userdata); | |
6a7a4e4d | 237 | if (r < 0) |
b98b483b | 238 | return r; |
b98b483b AR |
239 | |
240 | fdb_entry = NULL; | |
241 | ||
242 | return 0; | |
243 | } |