rtnl: expose IPv4 and IPv6 devconfig information

    # ucode -mrtnl -Rs 'printf("%.J", rtnl.request(rtnl.const.RTM_GETLINK, 0, { dev: "lo" }))'
    {
        "family": 0,
        "type": 772,
        "dev": "lo",
        "flags": 65609,
        "address": "00:00:00:00:00:00",
        "broadcast": "00:00:00:00:00:00",
        "txqlen": 1000,
        "mtu": 65536,
        "carrier": true,
        "linkmode": 0,
        "operstate": 0,
        "num_tx_queues": 1,
        "num_rx_queues": 1,
        "af_spec": {
            "inet": {
                "conf": {
                    "forwarding": 1,
                    "mc_forwarding": 0,
                    "proxy_arp": 0,
                    "accept_redirects": 1,
                    "secure_redirects": 1,
                    "send_redirects": 1,
                    "shared_media": 1,
                    "rp_filter": 0,
                    "accept_source_route": 1,
                    "bootp_relay": 0,
                    "log_martians": 0,
                    "tag": 0,
                    "arpfilter": 0,
                    "medium_id": 0,
                    "noxfrm": 1,
                    "nopolicy": 1,
                    "force_igmp_version": 0,
                    "arp_announce": 0,
                    "arp_ignore": 0,
                    "promote_secondaries": 0,
                    "arp_accept": 0,
                    "arp_notify": 0,
                    "accept_local": 0,
                    "src_vmark": 0,
                    "proxy_arp_pvlan": 0,
                    "route_localnet": 0,
                    "igmpv2_unsolicited_report_interval": 10000,
                    "igmpv3_unsolicited_report_interval": 1000,
                    "ignore_routes_with_linkdown": 0,
                    "drop_unicast_in_l2_multicast": 0,
                    "drop_gratuitous_arp": 0,
                    "bc_forwarding": 0
                }
            },
            "inet6": {
                "mode": 0,
                "flags": 2147483648,
                "conf": {
                    "forwarding": 0,
                    "hoplimit": 64,
                    "mtu6": 65536,
                    "accept_ra": 1,
                    "accept_redirects": 1,
                    "autoconf": 1,
                    "dad_transmits": 1,
                    "rtr_solicits": -1,
                    "rtr_solicit_interval": 4000,
                    "rtr_solicit_delay": 1000,
                    "use_tempaddr": -1,
                    "temp_valid_lft": 604800,
                    "temp_prefered_lft": 86400,
                    "regen_max_retry": 3,
                    "max_desync_factor": 600,
                    "max_addresses": 16,
                    "force_mld_version": 0,
                    "accept_ra_defrtr": 1,
                    "accept_ra_pinfo": 1,
                    "accept_ra_rtr_pref": 1,
                    "rtr_probe_interval": 60000,
                    "accept_ra_rt_info_max_plen": 0,
                    "proxy_ndp": 0,
                    "optimistic_dad": 0,
                    "accept_source_route": 0,
                    "mc_forwarding": 0,
                    "disable_ipv6": 0,
                    "accept_dad": -1,
                    "force_tllao": 0,
                    "ndisc_notify": 0,
                    "mldv1_unsolicited_report_interval": 10000,
                    "mldv2_unsolicited_report_interval": 1000,
                    "suppress_frag_ndisc": 1,
                    "accept_ra_from_local": 0,
                    "use_optimistic": 0,
                    "accept_ra_mtu": 1,
                    "stable_secret": 0,
                    "use_oif_addrs_only": 0,
                    "accept_ra_min_hop_limit": 1,
                    "ignore_routes_with_linkdown": 0,
                    "drop_unicast_in_l2_multicast": 0,
                    "drop_unsolicited_na": 0,
                    "keep_addr_on_down": 0,
                    "rtr_solicit_max_interval": 3600000,
                    "seg6_enabled": 0,
                    "seg6_require_hmac": 0,
                    "enhanced_dad": 1,
                    "addr_gen_mode": 0,
                    "disable_policy": 0,
                    "accept_ra_rt_info_min_plen": 0,
                    "ndisc_tclass": 0,
                    "rpl_seg_enabled": 0
                }
            }
        },
        "proto_down": false,
        "group": 0,
        "ifname": "lo"
    }

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

1 files changed, 197 insertions, 0 deletions

diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h
new file mode 100644
index 0000000..7060377
--- /dev/null
+++ b/include/linux/ipv6.h
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_IPV6_H
+#define _UAPI_IPV6_H
+
+#include <linux/libc-compat.h>
+#include <linux/types.h>
+#include <linux/in6.h>
+#include <asm/byteorder.h>
+
+/* The latest drafts declared increase in minimal mtu up to 1280. */
+
+#define IPV6_MIN_MTU	1280
+
+/*
+ *	Advanced API
+ *	source interface/address selection, source routing, etc...
+ *	*under construction*
+ */
+
+#if __UAPI_DEF_IN6_PKTINFO
+struct in6_pktinfo {
+	struct in6_addr	ipi6_addr;
+	int		ipi6_ifindex;
+};
+#endif
+
+#if __UAPI_DEF_IP6_MTUINFO
+struct ip6_mtuinfo {
+	struct sockaddr_in6	ip6m_addr;
+	__u32			ip6m_mtu;
+};
+#endif
+
+struct in6_ifreq {
+	struct in6_addr	ifr6_addr;
+	__u32		ifr6_prefixlen;
+	int		ifr6_ifindex; 
+};
+
+#define IPV6_SRCRT_STRICT	0x01	/* Deprecated; will be removed */
+#define IPV6_SRCRT_TYPE_0	0	/* Deprecated; will be removed */
+#define IPV6_SRCRT_TYPE_2	2	/* IPv6 type 2 Routing Header	*/
+#define IPV6_SRCRT_TYPE_3	3	/* RPL Segment Routing with IPv6 */
+#define IPV6_SRCRT_TYPE_4	4	/* Segment Routing with IPv6 */
+
+/*
+ *	routing header
+ */
+struct ipv6_rt_hdr {
+	__u8		nexthdr;
+	__u8		hdrlen;
+	__u8		type;
+	__u8		segments_left;
+
+	/*
+	 *	type specific data
+	 *	variable length field
+	 */
+};
+
+
+struct ipv6_opt_hdr {
+	__u8 		nexthdr;
+	__u8 		hdrlen;
+	/* 
+	 * TLV encoded option data follows.
+	 */
+} __attribute__((packed));	/* required for some archs */
+
+#define ipv6_destopt_hdr ipv6_opt_hdr
+#define ipv6_hopopt_hdr  ipv6_opt_hdr
+
+/* Router Alert option values (RFC2711) */
+#define IPV6_OPT_ROUTERALERT_MLD	0x0000	/* MLD(RFC2710) */
+
+/*
+ *	routing header type 0 (used in cmsghdr struct)
+ */
+
+struct rt0_hdr {
+	struct ipv6_rt_hdr	rt_hdr;
+	__u32			reserved;
+	struct in6_addr		addr[0];
+
+#define rt0_type		rt_hdr.type
+};
+
+/*
+ *	routing header type 2
+ */
+
+struct rt2_hdr {
+	struct ipv6_rt_hdr	rt_hdr;
+	__u32			reserved;
+	struct in6_addr		addr;
+
+#define rt2_type		rt_hdr.type
+};
+
+/*
+ *	home address option in destination options header
+ */
+
+struct ipv6_destopt_hao {
+	__u8			type;
+	__u8			length;
+	struct in6_addr		addr;
+} __attribute__((packed));
+
+/*
+ *	IPv6 fixed header
+ *
+ *	BEWARE, it is incorrect. The first 4 bits of flow_lbl
+ *	are glued to priority now, forming "class".
+ */
+
+struct ipv6hdr {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+	__u8			priority:4,
+				version:4;
+#elif defined(__BIG_ENDIAN_BITFIELD)
+	__u8			version:4,
+				priority:4;
+#else
+#error	"Please fix <asm/byteorder.h>"
+#endif
+	__u8			flow_lbl[3];
+
+	__be16			payload_len;
+	__u8			nexthdr;
+	__u8			hop_limit;
+
+	struct	in6_addr	saddr;
+	struct	in6_addr	daddr;
+};
+
+
+/* index values for the variables in ipv6_devconf */
+enum {
+	DEVCONF_FORWARDING = 0,
+	DEVCONF_HOPLIMIT,
+	DEVCONF_MTU6,
+	DEVCONF_ACCEPT_RA,
+	DEVCONF_ACCEPT_REDIRECTS,
+	DEVCONF_AUTOCONF,
+	DEVCONF_DAD_TRANSMITS,
+	DEVCONF_RTR_SOLICITS,
+	DEVCONF_RTR_SOLICIT_INTERVAL,
+	DEVCONF_RTR_SOLICIT_DELAY,
+	DEVCONF_USE_TEMPADDR,
+	DEVCONF_TEMP_VALID_LFT,
+	DEVCONF_TEMP_PREFERED_LFT,
+	DEVCONF_REGEN_MAX_RETRY,
+	DEVCONF_MAX_DESYNC_FACTOR,
+	DEVCONF_MAX_ADDRESSES,
+	DEVCONF_FORCE_MLD_VERSION,
+	DEVCONF_ACCEPT_RA_DEFRTR,
+	DEVCONF_ACCEPT_RA_PINFO,
+	DEVCONF_ACCEPT_RA_RTR_PREF,
+	DEVCONF_RTR_PROBE_INTERVAL,
+	DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN,
+	DEVCONF_PROXY_NDP,
+	DEVCONF_OPTIMISTIC_DAD,
+	DEVCONF_ACCEPT_SOURCE_ROUTE,
+	DEVCONF_MC_FORWARDING,
+	DEVCONF_DISABLE_IPV6,
+	DEVCONF_ACCEPT_DAD,
+	DEVCONF_FORCE_TLLAO,
+	DEVCONF_NDISC_NOTIFY,
+	DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL,
+	DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL,
+	DEVCONF_SUPPRESS_FRAG_NDISC,
+	DEVCONF_ACCEPT_RA_FROM_LOCAL,
+	DEVCONF_USE_OPTIMISTIC,
+	DEVCONF_ACCEPT_RA_MTU,
+	DEVCONF_STABLE_SECRET,
+	DEVCONF_USE_OIF_ADDRS_ONLY,
+	DEVCONF_ACCEPT_RA_MIN_HOP_LIMIT,
+	DEVCONF_IGNORE_ROUTES_WITH_LINKDOWN,
+	DEVCONF_DROP_UNICAST_IN_L2_MULTICAST,
+	DEVCONF_DROP_UNSOLICITED_NA,
+	DEVCONF_KEEP_ADDR_ON_DOWN,
+	DEVCONF_RTR_SOLICIT_MAX_INTERVAL,
+	DEVCONF_SEG6_ENABLED,
+	DEVCONF_SEG6_REQUIRE_HMAC,
+	DEVCONF_ENHANCED_DAD,
+	DEVCONF_ADDR_GEN_MODE,
+	DEVCONF_DISABLE_POLICY,
+	DEVCONF_ACCEPT_RA_RT_INFO_MIN_PLEN,
+	DEVCONF_NDISC_TCLASS,
+	DEVCONF_RPL_SEG_ENABLED,
+	DEVCONF_RA_DEFRTR_METRIC,
+	DEVCONF_MAX
+};
+
+
+#endif /* _UAPI_IPV6_H */