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4b292b55 VB |
1 | /* -*- mode: c; c-file-style: "openbsd" -*- */ |
2 | /* | |
3 | * Copyright (c) 2008 Vincent Bernat <bernat@luffy.cx> | |
4 | * | |
5 | * Permission to use, copy, modify, and/or distribute this software for any | |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
18 | #ifndef _LLDPD_H | |
19 | #define _LLDPD_H | |
20 | ||
21 | #if HAVE_CONFIG_H | |
22 | # include <config.h> | |
23 | #endif | |
24 | ||
25 | #ifdef HAVE_VALGRIND_VALGRIND_H | |
26 | # include <valgrind/valgrind.h> | |
27 | #else | |
28 | # define RUNNING_ON_VALGRIND 0 | |
29 | #endif | |
30 | ||
4b292b55 VB |
31 | #include <stdlib.h> |
32 | #include <stddef.h> | |
33 | #include <string.h> | |
34 | #include <sys/queue.h> | |
e12c2365 | 35 | #include <sys/types.h> |
690b944c | 36 | #include <netinet/if_ether.h> |
4b292b55 | 37 | #include <netinet/in.h> |
4b292b55 VB |
38 | #include <sys/un.h> |
39 | ||
45bf0bd0 VB |
40 | #if HAVE_VFORK_H |
41 | # include <vfork.h> | |
42 | #endif | |
43 | #if HAVE_WORKING_FORK | |
44 | # define vfork fork | |
45 | #endif | |
46 | ||
4b292b55 VB |
47 | #include "lldp-tlv.h" |
48 | #if defined (ENABLE_CDP) || defined (ENABLE_FDP) | |
49 | # include "cdp.h" | |
50 | #endif | |
51 | #ifdef ENABLE_SONMP | |
52 | # include "sonmp.h" | |
53 | #endif | |
54 | #ifdef ENABLE_EDP | |
55 | # include "edp.h" | |
56 | #endif | |
57 | ||
58 | #include "../compat/compat.h" | |
59 | #include "../marshal.h" | |
60 | #include "../log.h" | |
61 | #include "../ctl.h" | |
62 | #include "../lldpd-structs.h" | |
63 | ||
64 | /* We don't want to import event2/event.h. We only need those as | |
65 | opaque structs. */ | |
66 | struct event; | |
67 | struct event_base; | |
68 | ||
69 | #define SYSFS_CLASS_NET "/sys/class/net/" | |
70 | #define SYSFS_CLASS_DMI "/sys/class/dmi/id/" | |
8843f168 | 71 | #define LLDPD_TX_INTERVAL 30 |
c10302a3 | 72 | #define LLDPD_TX_HOLD 4 |
73 | #define LLDPD_TTL LLDPD_TX_INTERVAL * LLDPD_TX_HOLD | |
4b292b55 | 74 | #define LLDPD_TX_MSGDELAY 1 |
42589660 | 75 | #define LLDPD_MAX_NEIGHBORS 4 |
b9de0ca6 | 76 | #define LLDPD_FAST_TX_INTERVAL 1 |
77 | #define LLDPD_FAST_INIT 4 | |
4b292b55 VB |
78 | |
79 | #define USING_AGENTX_SUBAGENT_MODULE 1 | |
80 | ||
81 | #define PROTO_SEND_SIG struct lldpd *, struct lldpd_hardware * | |
82 | #define PROTO_DECODE_SIG struct lldpd *, char *, int, struct lldpd_hardware *, struct lldpd_chassis **, struct lldpd_port ** | |
83 | #define PROTO_GUESS_SIG char *, int | |
84 | ||
3d596bbe VB |
85 | #define ALIGNED_CAST(TYPE, ATTR) ((TYPE) (void *) (ATTR)) |
86 | ||
4b292b55 VB |
87 | struct protocol { |
88 | int mode; /* > 0 mode identifier (unique per protocol) */ | |
89 | int enabled; /* Is this protocol enabled? */ | |
90 | char *name; /* Name of protocol */ | |
91 | char arg; /* Argument to enable this protocol */ | |
92 | int(*send)(PROTO_SEND_SIG); /* How to send a frame */ | |
93 | int(*decode)(PROTO_DECODE_SIG); /* How to decode a frame */ | |
94 | int(*guess)(PROTO_GUESS_SIG); /* Can be NULL, use MAC address in this case */ | |
4e5f34c5 | 95 | u_int8_t mac[ETHER_ADDR_LEN]; /* Destination MAC address used by this protocol */ |
4b292b55 VB |
96 | }; |
97 | ||
4b292b55 VB |
98 | #define SMART_HIDDEN(port) (port->p_hidden_in) |
99 | ||
100 | struct lldpd { | |
101 | int g_sock; | |
4b292b55 VB |
102 | struct event_base *g_base; |
103 | #ifdef USE_SNMP | |
104 | #endif | |
105 | ||
8ec333bd VB |
106 | struct lldpd_config g_config; |
107 | ||
4b292b55 | 108 | struct protocol *g_protocols; |
4b292b55 | 109 | int g_lastrid; |
4b292b55 | 110 | struct event *g_main_loop; |
3333d2a8 | 111 | struct event *g_cleanup_timer; |
4b292b55 VB |
112 | #ifdef USE_SNMP |
113 | int g_snmp; | |
114 | struct event *g_snmp_timeout; | |
115 | void *g_snmp_fds; | |
abc04205 | 116 | const char *g_snmp_agentx; |
4b292b55 VB |
117 | #endif /* USE_SNMP */ |
118 | ||
119 | /* Unix socket handling */ | |
0262adbb | 120 | const char *g_ctlname; |
4b292b55 VB |
121 | int g_ctl; |
122 | struct event *g_ctl_event; | |
0484f180 VB |
123 | struct event *g_iface_event; /* Triggered when there is an interface change */ |
124 | struct event *g_iface_timer_event; /* Triggered one second after last interface change */ | |
4b292b55 | 125 | |
4b292b55 | 126 | char *g_lsb_release; |
4b292b55 VB |
127 | |
128 | #define LOCAL_CHASSIS(cfg) ((struct lldpd_chassis *)(TAILQ_FIRST(&cfg->g_chassis))) | |
129 | TAILQ_HEAD(, lldpd_chassis) g_chassis; | |
130 | TAILQ_HEAD(, lldpd_hardware) g_hardware; | |
131 | }; | |
132 | ||
4b292b55 VB |
133 | /* lldpd.c */ |
134 | struct lldpd_hardware *lldpd_get_hardware(struct lldpd *, | |
135 | char *, int, struct lldpd_ops *); | |
e12c2365 | 136 | struct lldpd_hardware *lldpd_alloc_hardware(struct lldpd *, char *, int); |
4b292b55 VB |
137 | void lldpd_hardware_cleanup(struct lldpd*, struct lldpd_hardware *); |
138 | struct lldpd_mgmt *lldpd_alloc_mgmt(int family, void *addr, size_t addrsize, u_int32_t iface); | |
139 | void lldpd_recv(struct lldpd *, struct lldpd_hardware *, int); | |
579bedd5 | 140 | void lldpd_send(struct lldpd_hardware *); |
4b292b55 | 141 | void lldpd_loop(struct lldpd *); |
1e0d651f | 142 | int lldpd_main(int, char **, char **); |
0484f180 | 143 | void lldpd_update_localports(struct lldpd *); |
3333d2a8 | 144 | void lldpd_cleanup(struct lldpd *); |
0484f180 | 145 | |
579bedd5 VB |
146 | /* frame.c */ |
147 | u_int16_t frame_checksum(const u_int8_t *, int, int); | |
4b292b55 VB |
148 | |
149 | /* event.c */ | |
150 | void levent_loop(struct lldpd *); | |
151 | void levent_hardware_init(struct lldpd_hardware *); | |
152 | void levent_hardware_add_fd(struct lldpd_hardware *, int); | |
153 | void levent_hardware_release(struct lldpd_hardware *); | |
4e90a9e0 | 154 | void levent_ctl_notify(char *, int, struct lldpd_port *); |
47287a61 | 155 | void levent_send_now(struct lldpd *); |
e681c859 | 156 | void levent_update_now(struct lldpd *); |
aa313f2a | 157 | int levent_iface_subscribe(struct lldpd *, int); |
579bedd5 | 158 | void levent_schedule_pdu(struct lldpd_hardware *); |
3333d2a8 | 159 | void levent_schedule_cleanup(struct lldpd *); |
bec75f84 | 160 | int levent_make_socket_nonblocking(int); |
4b292b55 VB |
161 | |
162 | /* lldp.c */ | |
e770b720 | 163 | int lldp_send_shutdown(PROTO_SEND_SIG); |
4b292b55 VB |
164 | int lldp_send(PROTO_SEND_SIG); |
165 | int lldp_decode(PROTO_DECODE_SIG); | |
166 | ||
167 | /* cdp.c */ | |
168 | #ifdef ENABLE_CDP | |
169 | int cdpv1_send(PROTO_SEND_SIG); | |
170 | int cdpv2_send(PROTO_SEND_SIG); | |
171 | int cdpv1_guess(PROTO_GUESS_SIG); | |
172 | int cdpv2_guess(PROTO_GUESS_SIG); | |
173 | #endif | |
174 | #if defined (ENABLE_CDP) || defined (ENABLE_FDP) | |
175 | int cdp_decode(PROTO_DECODE_SIG); | |
176 | #endif | |
177 | #ifdef ENABLE_FDP | |
178 | int fdp_send(PROTO_SEND_SIG); | |
179 | #endif | |
180 | ||
181 | #ifdef ENABLE_SONMP | |
182 | /* sonmp.c */ | |
183 | int sonmp_send(PROTO_SEND_SIG); | |
184 | int sonmp_decode(PROTO_DECODE_SIG); | |
185 | #endif | |
186 | ||
187 | #ifdef ENABLE_EDP | |
188 | /* edp.c */ | |
189 | int edp_send(PROTO_SEND_SIG); | |
190 | int edp_decode(PROTO_DECODE_SIG); | |
191 | #endif | |
192 | ||
4b292b55 VB |
193 | /* dmi.c */ |
194 | #ifdef ENABLE_LLDPMED | |
4b292b55 VB |
195 | char *dmi_hw(void); |
196 | char *dmi_fw(void); | |
197 | char *dmi_sn(void); | |
198 | char *dmi_manuf(void); | |
199 | char *dmi_model(void); | |
200 | char *dmi_asset(void); | |
201 | #endif | |
4b292b55 | 202 | |
25de85a4 | 203 | #ifdef USE_SNMP |
4b292b55 VB |
204 | /* agent.c */ |
205 | void agent_shutdown(void); | |
83d4b776 | 206 | void agent_init(struct lldpd *, const char *); |
25de85a4 VB |
207 | void agent_notify(struct lldpd_hardware *, int, struct lldpd_port *); |
208 | #endif | |
4b292b55 | 209 | |
71a7dbb3 | 210 | #ifdef ENABLE_PRIVSEP |
4b292b55 VB |
211 | /* agent_priv.c */ |
212 | void agent_priv_register_domain(void); | |
71a7dbb3 | 213 | #endif |
4b292b55 VB |
214 | |
215 | /* client.c */ | |
e0478a46 VB |
216 | int |
217 | client_handle_client(struct lldpd *cfg, | |
218 | ssize_t(*send)(void *, int, void *, size_t), | |
219 | void *, | |
4e90a9e0 VB |
220 | enum hmsg_type type, void *buffer, size_t n, |
221 | int*); | |
4b292b55 VB |
222 | |
223 | /* priv.c */ | |
6fd393a2 | 224 | void priv_init(const char*, int, uid_t, gid_t); |
71a7dbb3 | 225 | void priv_wait(void); |
0262adbb | 226 | void priv_ctl_cleanup(const char *ctlname); |
4b292b55 | 227 | char *priv_gethostbyname(void); |
e12c2365 | 228 | #ifdef HOST_OS_LINUX |
70c9cb05 | 229 | int priv_open(char*); |
4ea0565e | 230 | void asroot_open(void); |
e12c2365 | 231 | int priv_ethtool(char*, void*, size_t); |
4ea0565e | 232 | void asroot_ethtool(void); |
e12c2365 | 233 | #endif |
e735a319 | 234 | int priv_iface_init(int, char *); |
4ea0565e | 235 | int asroot_iface_init_os(int, char *, int *); |
4b292b55 | 236 | int priv_iface_multicast(const char *, u_int8_t *, int); |
47820fc4 VB |
237 | int priv_iface_description(const char *, const char *); |
238 | int asroot_iface_description_os(const char *, const char *); | |
f84199dd VB |
239 | int priv_iface_promisc(const char*); |
240 | int asroot_iface_promisc_os(const char *); | |
4b292b55 VB |
241 | int priv_snmp_socket(struct sockaddr_un *); |
242 | ||
065732ca | 243 | enum priv_cmd { |
4ea0565e VB |
244 | PRIV_PING, |
245 | PRIV_DELETE_CTL_SOCKET, | |
246 | PRIV_GET_HOSTNAME, | |
247 | PRIV_OPEN, | |
248 | PRIV_ETHTOOL, | |
249 | PRIV_IFACE_INIT, | |
250 | PRIV_IFACE_MULTICAST, | |
47820fc4 | 251 | PRIV_IFACE_DESCRIPTION, |
f84199dd | 252 | PRIV_IFACE_PROMISC, |
4ea0565e | 253 | PRIV_SNMP_SOCKET, |
065732ca | 254 | }; |
4ea0565e | 255 | |
00e40dba | 256 | /* priv-seccomp.c */ |
71a7dbb3 | 257 | #if defined USE_SECCOMP && defined ENABLE_PRIVSEP |
00e40dba VB |
258 | int priv_seccomp_init(int, int); |
259 | #endif | |
4ea0565e VB |
260 | |
261 | /* privsep_io.c */ | |
d2a289bb VB |
262 | enum priv_context { |
263 | PRIV_PRIVILEGED, | |
264 | PRIV_UNPRIVILEGED | |
265 | }; | |
266 | int may_read(enum priv_context, void *, size_t); | |
267 | void must_read(enum priv_context, void *, size_t); | |
268 | void must_write(enum priv_context, const void *, size_t); | |
269 | void priv_privileged_fd(int); | |
270 | void priv_unprivileged_fd(int); | |
271 | int receive_fd(enum priv_context); | |
272 | void send_fd(enum priv_context, int); | |
4b292b55 | 273 | |
e12c2365 | 274 | /* interfaces-*.c */ |
e12c2365 | 275 | |
adbb6e54 VB |
276 | /* BPF filter to get revelant information from interfaces */ |
277 | /* LLDP: "ether proto 0x88cc and ether dst 01:80:c2:00:00:0e" */ | |
278 | /* FDP: "ether dst 01:e0:52:cc:cc:cc" */ | |
279 | /* CDP: "ether dst 01:00:0c:cc:cc:cc" */ | |
280 | /* SONMP: "ether dst 01:00:81:00:01:00" */ | |
281 | /* EDP: "ether dst 00:e0:2b:00:00:00" */ | |
282 | /* For optimization purpose, we first check if the first bit of the | |
283 | first byte is 1. if not, this can only be an EDP packet: | |
284 | ||
285 | tcpdump -dd "(ether[0] & 1 = 1 and | |
286 | ((ether proto 0x88cc and ether dst 01:80:c2:00:00:0e) or | |
287 | (ether dst 01:e0:52:cc:cc:cc) or | |
288 | (ether dst 01:00:0c:cc:cc:cc) or | |
289 | (ether dst 01:00:81:00:01:00))) or | |
290 | (ether dst 00:e0:2b:00:00:00)" | |
291 | */ | |
292 | ||
293 | #define LLDPD_FILTER_F \ | |
294 | { 0x30, 0, 0, 0x00000000 }, \ | |
295 | { 0x54, 0, 0, 0x00000001 }, \ | |
296 | { 0x15, 0, 14, 0x00000001 }, \ | |
297 | { 0x28, 0, 0, 0x0000000c }, \ | |
298 | { 0x15, 0, 4, 0x000088cc }, \ | |
299 | { 0x20, 0, 0, 0x00000002 }, \ | |
300 | { 0x15, 0, 2, 0xc200000e }, \ | |
301 | { 0x28, 0, 0, 0x00000000 }, \ | |
302 | { 0x15, 12, 13, 0x00000180 }, \ | |
303 | { 0x20, 0, 0, 0x00000002 }, \ | |
304 | { 0x15, 0, 2, 0x52cccccc }, \ | |
305 | { 0x28, 0, 0, 0x00000000 }, \ | |
306 | { 0x15, 8, 9, 0x000001e0 }, \ | |
307 | { 0x15, 1, 0, 0x0ccccccc }, \ | |
308 | { 0x15, 0, 2, 0x81000100 }, \ | |
309 | { 0x28, 0, 0, 0x00000000 }, \ | |
310 | { 0x15, 4, 5, 0x00000100 }, \ | |
311 | { 0x20, 0, 0, 0x00000002 }, \ | |
312 | { 0x15, 0, 3, 0x2b000000 }, \ | |
313 | { 0x28, 0, 0, 0x00000000 }, \ | |
314 | { 0x15, 0, 1, 0x000000e0 }, \ | |
315 | { 0x6, 0, 0, 0x0000ffff }, \ | |
316 | { 0x6, 0, 0, 0x00000000 }, | |
317 | ||
318 | /* This function is responsible to refresh information about interfaces. It is | |
319 | * OS specific but should be present for each OS. It can use the functions in | |
320 | * `interfaces.c` as helper by providing a list of OS-independent interface | |
321 | * devices. */ | |
322 | void interfaces_update(struct lldpd *); | |
adbb6e54 VB |
323 | |
324 | /* interfaces.c */ | |
325 | /* An interface cannot be both physical and (bridge or bond or vlan) */ | |
326 | #define IFACE_PHYSICAL_T (1 << 0) /* Physical interface */ | |
327 | #define IFACE_BRIDGE_T (1 << 1) /* Bridge interface */ | |
328 | #define IFACE_BOND_T (1 << 2) /* Bond interface */ | |
329 | #define IFACE_VLAN_T (1 << 3) /* VLAN interface */ | |
330 | #define IFACE_WIRELESS_T (1 << 4) /* Wireless interface */ | |
331 | struct interfaces_device { | |
332 | TAILQ_ENTRY(interfaces_device) next; | |
e12c2365 VB |
333 | int index; /* Index */ |
334 | char *name; /* Name */ | |
335 | char *alias; /* Alias */ | |
e12c2365 | 336 | char *address; /* MAC address */ |
adbb6e54 VB |
337 | char *driver; /* Driver (for whitelisting purpose) */ |
338 | int flags; /* Flags (IFF_*) */ | |
339 | int mtu; /* MTU */ | |
340 | int type; /* Type (see IFACE_*_T) */ | |
341 | int vlanid; /* If a VLAN, what is the VLAN ID? */ | |
342 | struct interfaces_device *lower; /* Lower interface (for a VLAN for example) */ | |
343 | struct interfaces_device *upper; /* Upper interface (for a bridge or a bond) */ | |
344 | ||
345 | /* The following are OS specific. Should be static (no free function) */ | |
346 | #ifdef HOST_OS_LINUX | |
347 | int lower_idx; /* Index to lower interface */ | |
348 | int upper_idx; /* Index to upper interface */ | |
349 | int txqueue; /* Transmit queue length */ | |
350 | #endif | |
e12c2365 | 351 | }; |
adbb6e54 VB |
352 | struct interfaces_address { |
353 | TAILQ_ENTRY(interfaces_address) next; | |
354 | int index; /* Index */ | |
355 | int flags; /* Flags */ | |
e12c2365 | 356 | struct sockaddr_storage address; /* Address */ |
adbb6e54 VB |
357 | |
358 | /* The following are OS specific. */ | |
359 | /* Nothing yet. */ | |
e12c2365 | 360 | }; |
adbb6e54 VB |
361 | TAILQ_HEAD(interfaces_device_list, interfaces_device); |
362 | TAILQ_HEAD(interfaces_address_list, interfaces_address); | |
363 | void interfaces_free_device(struct interfaces_device *); | |
364 | void interfaces_free_address(struct interfaces_address *); | |
365 | void interfaces_free_devices(struct interfaces_device_list *); | |
366 | void interfaces_free_addresses(struct interfaces_address_list *); | |
367 | struct interfaces_device* interfaces_indextointerface( | |
368 | struct interfaces_device_list *, | |
369 | int); | |
370 | struct interfaces_device* interfaces_nametointerface( | |
371 | struct interfaces_device_list *, | |
372 | const char *); | |
373 | ||
f84199dd VB |
374 | void interfaces_helper_promisc(struct lldpd *, |
375 | struct lldpd_hardware *); | |
adbb6e54 VB |
376 | void interfaces_helper_whitelist(struct lldpd *, |
377 | struct interfaces_device_list *); | |
378 | void interfaces_helper_chassis(struct lldpd *, | |
379 | struct interfaces_device_list *); | |
bdfe4193 VB |
380 | void interfaces_helper_add_hardware(struct lldpd *, |
381 | struct lldpd_hardware *); | |
adbb6e54 | 382 | void interfaces_helper_physical(struct lldpd *, |
88bc404f | 383 | struct interfaces_device_list *, |
22e8cd65 | 384 | struct lldpd_ops *, |
88bc404f | 385 | int(*init)(struct lldpd *, struct lldpd_hardware *)); |
8fbd3195 ST |
386 | void interfaces_helper_port_name_desc(struct lldpd *, |
387 | struct lldpd_hardware *, | |
adbb6e54 VB |
388 | struct interfaces_device *); |
389 | void interfaces_helper_mgmt(struct lldpd *, | |
390 | struct interfaces_address_list *); | |
391 | #ifdef ENABLE_DOT1 | |
392 | void interfaces_helper_vlan(struct lldpd *, | |
393 | struct interfaces_device_list *); | |
394 | #endif | |
5347914e VB |
395 | int interfaces_send_helper(struct lldpd *, |
396 | struct lldpd_hardware *, char *, size_t); | |
adbb6e54 VB |
397 | |
398 | void interfaces_setup_multicast(struct lldpd *, const char *, int); | |
c3e340b6 | 399 | int interfaces_routing_enabled(struct lldpd *); |
adbb6e54 VB |
400 | |
401 | #ifdef HOST_OS_LINUX | |
402 | /* netlink.c */ | |
403 | struct interfaces_device_list *netlink_get_interfaces(void); | |
404 | struct interfaces_address_list *netlink_get_addresses(void); | |
0484f180 | 405 | int netlink_subscribe_changes(void); |
e12c2365 VB |
406 | #endif |
407 | ||
c3e340b6 VB |
408 | #ifndef HOST_OS_LINUX |
409 | int ifbpf_phys_init(struct lldpd *, struct lldpd_hardware *); | |
410 | #endif | |
411 | ||
d5e69431 VB |
412 | /* pattern.c */ |
413 | int pattern_match(char *, char *, int); | |
414 | ||
4b292b55 | 415 | #endif /* _LLDPD_H */ |