Merging upstream version 256.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 330 insertions, 0 deletions

diff --git a/src/libsystemd-network/ndisc-option.h b/src/libsystemd-network/ndisc-option.h
new file mode 100644
index 0000000..d7bd861
--- /dev/null
+++ b/src/libsystemd-network/ndisc-option.h
@@ -0,0 +1,330 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <inttypes.h>
+#include <net/ethernet.h>
+#include <netinet/icmp6.h>
+#include <netinet/in.h>
+#include <netinet/ip6.h>
+#include <sys/uio.h>
+
+#include "sd-ndisc-protocol.h"
+
+#include "icmp6-packet.h"
+#include "macro.h"
+#include "set.h"
+#include "time-util.h"
+
+typedef struct sd_ndisc_raw {
+        uint8_t *bytes;
+        size_t length;
+} sd_ndisc_raw;
+
+/* Mostly equivalent to struct nd_opt_prefix_info, but using usec_t. */
+typedef struct sd_ndisc_prefix {
+        uint8_t flags;
+        uint8_t prefixlen;
+        struct in6_addr address;
+        usec_t valid_lifetime;
+        usec_t preferred_lifetime;
+        /* timestamp in CLOCK_BOOTTIME, used when sending option for adjusting lifetime. */
+        usec_t valid_until;
+        usec_t preferred_until;
+} sd_ndisc_prefix;
+
+typedef struct sd_ndisc_home_agent {
+        uint16_t preference;
+        usec_t lifetime;
+        usec_t valid_until;
+} sd_ndisc_home_agent;
+
+typedef struct sd_ndisc_route {
+        uint8_t preference;
+        uint8_t prefixlen;
+        struct in6_addr address;
+        usec_t lifetime;
+        usec_t valid_until;
+} sd_ndisc_route;
+
+typedef struct sd_ndisc_rdnss {
+        size_t n_addresses;
+        struct in6_addr *addresses;
+        usec_t lifetime;
+        usec_t valid_until;
+} sd_ndisc_rdnss;
+
+typedef struct sd_ndisc_dnssl {
+        char **domains;
+        usec_t lifetime;
+        usec_t valid_until;
+} sd_ndisc_dnssl;
+
+typedef struct sd_ndisc_prefix64 {
+        uint8_t prefixlen;
+        struct in6_addr prefix;
+        usec_t lifetime;
+        usec_t valid_until;
+} sd_ndisc_prefix64;
+
+typedef struct sd_ndisc_option {
+        uint8_t type;
+        size_t offset;
+
+        union {
+                sd_ndisc_raw raw;               /* for testing or unsupported options */
+                struct ether_addr mac;          /* SD_NDISC_OPTION_SOURCE_LL_ADDRESS or SD_NDISC_OPTION_TARGET_LL_ADDRESS */
+                sd_ndisc_prefix prefix;         /* SD_NDISC_OPTION_PREFIX_INFORMATION */
+                struct ip6_hdr hdr;             /* SD_NDISC_OPTION_REDIRECTED_HEADER */
+                uint32_t mtu;                   /* SD_NDISC_OPTION_MTU */
+                sd_ndisc_home_agent home_agent; /* SD_NDISC_OPTION_HOME_AGENT */
+                sd_ndisc_route route;           /* SD_NDISC_OPTION_ROUTE_INFORMATION */
+                sd_ndisc_rdnss rdnss;           /* SD_NDISC_OPTION_RDNSS */
+                uint64_t extended_flags;        /* SD_NDISC_OPTION_FLAGS_EXTENSION */
+                sd_ndisc_dnssl dnssl;           /* SD_NDISC_OPTION_DNSSL */
+                char *captive_portal;           /* SD_NDISC_OPTION_CAPTIVE_PORTAL */
+                sd_ndisc_prefix64 prefix64;     /* SD_NDISC_OPTION_PREF64 */
+        };
+} sd_ndisc_option;
+
+/* RFC 8781: PREF64 or (NAT64 prefix) */
+#define PREF64_SCALED_LIFETIME_MASK      0xfff8
+#define PREF64_PLC_MASK                  0x0007
+#define PREF64_MAX_LIFETIME_USEC         (65528 * USEC_PER_SEC)
+
+typedef enum PrefixLengthCode {
+        PREFIX_LENGTH_CODE_96,
+        PREFIX_LENGTH_CODE_64,
+        PREFIX_LENGTH_CODE_56,
+        PREFIX_LENGTH_CODE_48,
+        PREFIX_LENGTH_CODE_40,
+        PREFIX_LENGTH_CODE_32,
+        _PREFIX_LENGTH_CODE_MAX,
+        _PREFIX_LENGTH_CODE_INVALID = -EINVAL,
+} PrefixLengthCode;
+
+/* rfc8781: section 4 - Scaled Lifetime: 13-bit unsigned integer. PREFIX_LEN (Prefix Length Code): 3-bit unsigned integer */
+struct nd_opt_prefix64_info {
+        uint8_t type;
+        uint8_t length;
+        uint16_t lifetime_and_plc;
+        uint8_t prefix[12];
+} _packed_;
+
+int pref64_prefix_length_to_plc(uint8_t prefixlen, uint8_t *ret);
+
+sd_ndisc_option* ndisc_option_free(sd_ndisc_option *option);
+
+int ndisc_option_parse(
+                ICMP6Packet *p,
+                size_t offset,
+                uint8_t *ret_type,
+                size_t *ret_len,
+                const uint8_t **ret_opt);
+
+int ndisc_parse_options(ICMP6Packet *p, Set **ret_options);
+
+static inline sd_ndisc_option* ndisc_option_get(Set *options, const sd_ndisc_option *p) {
+        return set_get(options, ASSERT_PTR(p));
+}
+static inline sd_ndisc_option* ndisc_option_get_by_type(Set *options, uint8_t type) {
+        return ndisc_option_get(options, &(const sd_ndisc_option) { .type = type });
+}
+int ndisc_option_get_mac(Set *options, uint8_t type, struct ether_addr *ret);
+
+static inline void ndisc_option_remove(Set *options, const sd_ndisc_option *p) {
+        ndisc_option_free(set_remove(options, ASSERT_PTR(p)));
+}
+static inline void ndisc_option_remove_by_type(Set *options, uint8_t type) {
+        ndisc_option_remove(options, &(const sd_ndisc_option) { .type = type });
+}
+
+int ndisc_option_set_raw(
+                Set **options,
+                size_t length,
+                const uint8_t *bytes);
+int ndisc_option_add_link_layer_address(
+                Set **options,
+                uint8_t type,
+                size_t offset,
+                const struct ether_addr *mac);
+static inline int ndisc_option_set_link_layer_address(
+                Set **options,
+                uint8_t type,
+                const struct ether_addr *mac) {
+        return ndisc_option_add_link_layer_address(options, type, 0, mac);
+}
+int ndisc_option_add_prefix_internal(
+                Set **options,
+                size_t offset,
+                uint8_t flags,
+                uint8_t prefixlen,
+                const struct in6_addr *address,
+                usec_t valid_lifetime,
+                usec_t preferred_lifetime,
+                usec_t valid_until,
+                usec_t preferred_until);
+static inline int ndisc_option_add_prefix(
+                Set **options,
+                size_t offset,
+                uint8_t flags,
+                uint8_t prefixlen,
+                const struct in6_addr *address,
+                usec_t valid_lifetime,
+                usec_t preferred_lifetime) {
+        return ndisc_option_add_prefix_internal(options, offset, flags, prefixlen, address,
+                                                valid_lifetime, preferred_lifetime,
+                                                USEC_INFINITY, USEC_INFINITY);
+}
+static inline int ndisc_option_set_prefix(
+                Set **options,
+                uint8_t flags,
+                uint8_t prefixlen,
+                const struct in6_addr *address,
+                usec_t valid_lifetime,
+                usec_t preferred_lifetime,
+                usec_t valid_until,
+                usec_t preferred_until) {
+        return ndisc_option_add_prefix_internal(options, 0, flags, prefixlen, address,
+                                                valid_lifetime, preferred_lifetime,
+                                                valid_until, preferred_until);
+}
+int ndisc_option_add_redirected_header(
+                Set **options,
+                size_t offset,
+                const struct ip6_hdr *hdr);
+int ndisc_option_add_mtu(
+                Set **options,
+                size_t offset,
+                uint32_t mtu);
+static inline int ndisc_option_set_mtu(
+                Set **options,
+                uint32_t mtu) {
+        return ndisc_option_add_mtu(options, 0, mtu);
+}
+int ndisc_option_add_home_agent_internal(
+                Set **options,
+                size_t offset,
+                uint16_t preference,
+                usec_t lifetime,
+                usec_t valid_until);
+static inline int ndisc_option_add_home_agent(
+                Set **options,
+                size_t offset,
+                uint16_t preference,
+                usec_t lifetime) {
+        return ndisc_option_add_home_agent_internal(options, offset, preference, lifetime, USEC_INFINITY);
+}
+static inline int ndisc_option_set_home_agent(
+                Set **options,
+                uint16_t preference,
+                usec_t lifetime,
+                usec_t valid_until) {
+        return ndisc_option_add_home_agent_internal(options, 0, preference, lifetime, valid_until);
+}
+int ndisc_option_add_route_internal(
+                Set **options,
+                size_t offset,
+                uint8_t preference,
+                uint8_t prefixlen,
+                const struct in6_addr *prefix,
+                usec_t lifetime,
+                usec_t valid_until);
+static inline int ndisc_option_add_route(
+                Set **options,
+                size_t offset,
+                uint8_t preference,
+                uint8_t prefixlen,
+                const struct in6_addr *prefix,
+                usec_t lifetime) {
+        return ndisc_option_add_route_internal(options, offset, preference, prefixlen, prefix, lifetime, USEC_INFINITY);
+}
+static inline int ndisc_option_set_route(
+                Set **options,
+                uint8_t preference,
+                uint8_t prefixlen,
+                const struct in6_addr *prefix,
+                usec_t lifetime,
+                usec_t valid_until) {
+        return ndisc_option_add_route_internal(options, 0, preference, prefixlen, prefix, lifetime, valid_until);
+}
+int ndisc_option_add_rdnss_internal(
+                Set **options,
+                size_t offset,
+                size_t n_addresses,
+                const struct in6_addr *addresses,
+                usec_t lifetime,
+                usec_t valid_until);
+static inline int ndisc_option_add_rdnss(
+                Set **options,
+                size_t offset,
+                size_t n_addresses,
+                const struct in6_addr *addresses,
+                usec_t lifetime) {
+        return ndisc_option_add_rdnss_internal(options, offset, n_addresses, addresses, lifetime, USEC_INFINITY);
+}
+static inline int ndisc_option_set_rdnss(
+                Set **options,
+                size_t n_addresses,
+                const struct in6_addr *addresses,
+                usec_t lifetime,
+                usec_t valid_until) {
+        return ndisc_option_add_rdnss_internal(options, 0, n_addresses, addresses, lifetime, valid_until);
+}
+int ndisc_option_add_flags_extension(
+                Set **options,
+                size_t offset,
+                uint64_t flags);
+int ndisc_option_add_dnssl_internal(
+                Set **options,
+                size_t offset,
+                char * const *domains,
+                usec_t lifetime,
+                usec_t valid_until);
+static inline int ndisc_option_add_dnssl(
+                Set **options,
+                size_t offset,
+                char * const *domains,
+                usec_t lifetime) {
+        return ndisc_option_add_dnssl_internal(options, offset, domains, lifetime, USEC_INFINITY);
+}
+static inline int ndisc_option_set_dnssl(
+                Set **options,
+                char * const *domains,
+                usec_t lifetime,
+                usec_t valid_until) {
+        return ndisc_option_add_dnssl_internal(options, 0, domains, lifetime, valid_until);
+}
+int ndisc_option_add_captive_portal(
+                Set **options,
+                size_t offset,
+                const char *portal);
+static inline int ndisc_option_set_captive_portal(
+                Set **options,
+                const char *portal) {
+        return ndisc_option_add_captive_portal(options, 0, portal);
+}
+int ndisc_option_add_prefix64_internal(
+                Set **options,
+                size_t offset,
+                uint8_t prefixlen,
+                const struct in6_addr *prefix,
+                usec_t lifetime,
+                usec_t valid_until);
+static inline int ndisc_option_add_prefix64(
+                Set **options,
+                size_t offset,
+                uint8_t prefixlen,
+                const struct in6_addr *prefix,
+                usec_t lifetime) {
+        return ndisc_option_add_prefix64_internal(options, offset, prefixlen, prefix, lifetime, USEC_INFINITY);
+}
+static inline int ndisc_option_set_prefix64(
+                Set **options,
+                uint8_t prefixlen,
+                const struct in6_addr *prefix,
+                usec_t lifetime,
+                usec_t valid_until) {
+        return ndisc_option_add_prefix64_internal(options, 0, prefixlen, prefix, lifetime, valid_until);
+}
+
+int ndisc_send(int fd, const struct in6_addr *dst, const struct icmp6_hdr *hdr, Set *options, usec_t timestamp);