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Diffstat (limited to 'src/libsystemd-network/radv-internal.h')
| -rw-r--r-- | src/libsystemd-network/radv-internal.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/libsystemd-network/radv-internal.h b/src/libsystemd-network/radv-internal.h new file mode 100644 index 0000000..3dbeffe --- /dev/null +++ b/src/libsystemd-network/radv-internal.h @@ -0,0 +1,129 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#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_ROUTE_INFORMATION 24 +#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); + + unsigned n_route_prefixes; + LIST_HEAD(sd_radv_route_prefix, route_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 radv_route_prefix_opt__contents { \ + uint8_t type; \ + uint8_t length; \ + uint8_t prefixlen; \ + uint8_t flags_reserved; \ + be32_t lifetime; \ + struct in6_addr in6_addr; \ +} + +struct radv_route_prefix_opt radv_route_prefix_opt__contents; + +struct radv_route_prefix_opt__packed radv_route_prefix_opt__contents _packed_; +assert_cc(sizeof(struct radv_route_prefix_opt) == sizeof(struct radv_route_prefix_opt__packed)); + +struct sd_radv_route_prefix { + unsigned n_ref; + + struct radv_route_prefix_opt opt; + + LIST_FIELDS(struct sd_radv_route_prefix, prefix); +}; + +#define log_radv_full(level, error, fmt, ...) log_internal(level, error, PROJECT_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__) |