[thirdparty/systemd.git] / src / libsystemd-network / radv-internal.h

/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once

/***
  Copyright © 2017 Intel Corporation. All rights reserved.
***/

#include "sd-radv.h"

#include "log.h"
#include "list.h"
#include "sparse-endian.h"

assert_cc(SD_RADV_DEFAULT_MIN_TIMEOUT_USEC <= SD_RADV_DEFAULT_MAX_TIMEOUT_USEC)

#define SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC (16*USEC_PER_SEC)
#define SD_RADV_MAX_INITIAL_RTR_ADVERTISEMENTS  3
#define SD_RADV_MAX_FINAL_RTR_ADVERTISEMENTS    3
#define SD_RADV_MIN_DELAY_BETWEEN_RAS           3
#define SD_RADV_MAX_RA_DELAY_TIME_USEC          (500*USEC_PER_MSEC)

#define SD_RADV_OPT_RDNSS                       25
#define SD_RADV_OPT_DNSSL                       31

enum RAdvState {
        SD_RADV_STATE_IDLE                      = 0,
        SD_RADV_STATE_ADVERTISING               = 1,
};
typedef enum RAdvState RAdvState;

struct sd_radv_opt_dns {
        uint8_t type;
        uint8_t length;
        uint16_t reserved;
        be32_t lifetime;
} _packed_;

struct sd_radv {
        unsigned n_ref;
        RAdvState state;

        int ifindex;

        sd_event *event;
        int event_priority;

        struct ether_addr mac_addr;
        uint8_t hop_limit;
        uint8_t flags;
        uint32_t mtu;
        uint16_t lifetime;

        int fd;
        unsigned ra_sent;
        sd_event_source *recv_event_source;
        sd_event_source *timeout_event_source;

        unsigned n_prefixes;
        LIST_HEAD(sd_radv_prefix, prefixes);

        size_t n_rdnss;
        struct sd_radv_opt_dns *rdnss;
        struct sd_radv_opt_dns *dnssl;
};

#define radv_prefix_opt__contents {             \
        uint8_t type;                           \
        uint8_t length;                         \
        uint8_t prefixlen;                      \
        uint8_t flags;                          \
        be32_t valid_lifetime;                  \
        be32_t preferred_lifetime;              \
        uint32_t reserved;                      \
        struct in6_addr in6_addr;               \
}

struct radv_prefix_opt radv_prefix_opt__contents;

/* We need the opt substructure to be packed, because we use it in send(). But
 * if we use _packed_, this means that the structure cannot be used directly in
 * normal code in general, because the fields might not be properly aligned.
 * But in this particular case, the structure is defined in a way that gives
 * proper alignment, even without the explicit _packed_ attribute. To appease
 * the compiler we use the "unpacked" structure, but we also verify that
 * structure contains no holes, so offsets are the same when _packed_ is used.
 */
struct radv_prefix_opt__packed radv_prefix_opt__contents _packed_;
assert_cc(sizeof(struct radv_prefix_opt) == sizeof(struct radv_prefix_opt__packed));

struct sd_radv_prefix {
        unsigned n_ref;

        struct radv_prefix_opt opt;

        LIST_FIELDS(struct sd_radv_prefix, prefix);

        usec_t valid_until;
        usec_t preferred_until;
};

#define log_radv_full(level, error, fmt, ...) log_internal(level, error, __FILE__, __LINE__, __func__, "RADV: " fmt, ##__VA_ARGS__)
#define log_radv_errno(error, fmt, ...) log_radv_full(LOG_DEBUG, error, fmt, ##__VA_ARGS__)
#define log_radv(fmt, ...) log_radv_errno(0, fmt, ##__VA_ARGS__)
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
04473969 PF	2	#pragma once
	3
	4	/***
810adae9	5	Copyright © 2017 Intel Corporation. All rights reserved.
04473969 PF	6	***/
	7
	8	#include "sd-radv.h"
	9
	10	#include "log.h"
	11	#include "list.h"
	12	#include "sparse-endian.h"
	13
204fb681 PF	14	assert_cc(SD_RADV_DEFAULT_MIN_TIMEOUT_USEC <= SD_RADV_DEFAULT_MAX_TIMEOUT_USEC)
	15
	16	#define SD_RADV_MAX_INITIAL_RTR_ADVERT_INTERVAL_USEC (16*USEC_PER_SEC)
	17	#define SD_RADV_MAX_INITIAL_RTR_ADVERTISEMENTS 3
	18	#define SD_RADV_MAX_FINAL_RTR_ADVERTISEMENTS 3
	19	#define SD_RADV_MIN_DELAY_BETWEEN_RAS 3
	20	#define SD_RADV_MAX_RA_DELAY_TIME_USEC (500*USEC_PER_MSEC)
	21
e9c6da38	22	#define SD_RADV_OPT_RDNSS 25
e965d6ab	23	#define SD_RADV_OPT_DNSSL 31
e9c6da38	24
204f99d2 PF	25	enum RAdvState {
	26	SD_RADV_STATE_IDLE = 0,
	27	SD_RADV_STATE_ADVERTISING = 1,
	28	};
	29	typedef enum RAdvState RAdvState;
	30
e9c6da38 PF	31	struct sd_radv_opt_dns {
	32	uint8_t type;
	33	uint8_t length;
	34	uint16_t reserved;
	35	be32_t lifetime;
	36	} _packed_;
	37
204f99d2 PF	38	struct sd_radv {
	39	unsigned n_ref;
	40	RAdvState state;
	41
	42	int ifindex;
	43
	44	sd_event *event;
	45	int event_priority;
	46
	47	struct ether_addr mac_addr;
	48	uint8_t hop_limit;
	49	uint8_t flags;
	50	uint32_t mtu;
	51	uint16_t lifetime;
	52
77baf5ae	53	int fd;
204fb681	54	unsigned ra_sent;
88d5a3db	55	sd_event_source *recv_event_source;
204fb681 PF	56	sd_event_source *timeout_event_source;
204fb681 PF	57
204f99d2 PF	58	unsigned n_prefixes;
204f99d2 PF	59	LIST_HEAD(sd_radv_prefix, prefixes);
e9c6da38 PF	60
	61	size_t n_rdnss;
	62	struct sd_radv_opt_dns *rdnss;
e965d6ab	63	struct sd_radv_opt_dns *dnssl;
204f99d2 PF	64	};
204f99d2 PF	65
e27b9aba ZJS	66	#define radv_prefix_opt__contents { \
	67	uint8_t type; \
	68	uint8_t length; \
	69	uint8_t prefixlen; \
	70	uint8_t flags; \
	71	be32_t valid_lifetime; \
	72	be32_t preferred_lifetime; \
	73	uint32_t reserved; \
	74	struct in6_addr in6_addr; \
	75	}
	76
	77	struct radv_prefix_opt radv_prefix_opt__contents;
	78
	79	/* We need the opt substructure to be packed, because we use it in send(). But
	80	* if we use _packed_, this means that the structure cannot be used directly in
	81	* normal code in general, because the fields might not be properly aligned.
	82	* But in this particular case, the structure is defined in a way that gives
	83	* proper alignment, even without the explicit _packed_ attribute. To appease
	84	* the compiler we use the "unpacked" structure, but we also verify that
	85	* structure contains no holes, so offsets are the same when _packed_ is used.
	86	*/
	87	struct radv_prefix_opt__packed radv_prefix_opt__contents _packed_;
	88	assert_cc(sizeof(struct radv_prefix_opt) == sizeof(struct radv_prefix_opt__packed));
	89
04473969 PF	90	struct sd_radv_prefix {
	91	unsigned n_ref;
	92
e27b9aba	93	struct radv_prefix_opt opt;
04473969 PF	94
04473969 PF	95	LIST_FIELDS(struct sd_radv_prefix, prefix);
d601b566 PF	96
	97	usec_t valid_until;
	98	usec_t preferred_until;
04473969 PF	99	};
	100
	101	#define log_radv_full(level, error, fmt, ...) log_internal(level, error, __FILE__, __LINE__, __func__, "RADV: " fmt, ##__VA_ARGS__)
	102	#define log_radv_errno(error, fmt, ...) log_radv_full(LOG_DEBUG, error, fmt, ##__VA_ARGS__)
04473969	103	#define log_radv(fmt, ...) log_radv_errno(0, fmt, ##__VA_ARGS__)