linux/net/ipv6/seg6.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  SR-IPv6 implementation
 *
 *  Author:
 *  David Lebrun <[email protected]>
 */

#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/slab.h>
#include <linux/rhashtable.h>

#include <net/ipv6.h>
#include <net/protocol.h>

#include <net/seg6.h>
#include <net/genetlink.h>
#include <linux/seg6.h>
#include <linux/seg6_genl.h>
#include <net/seg6_hmac.h>

bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced)
{ … }

struct ipv6_sr_hdr *seg6_get_srh(struct sk_buff *skb, int flags)
{ … }

/* Determine if an ICMP invoking packet contains a segment routing
 * header.  If it does, extract the offset to the true destination
 * address, which is in the first segment address.
 */
void seg6_icmp_srh(struct sk_buff *skb, struct inet6_skb_parm *opt)
{ … }

static struct genl_family seg6_genl_family;

static const struct nla_policy seg6_genl_policy[SEG6_ATTR_MAX + 1] = …;

#ifdef CONFIG_IPV6_SEG6_HMAC

static int seg6_genl_sethmac(struct sk_buff *skb, struct genl_info *info)
{ … }

#else

static int seg6_genl_sethmac(struct sk_buff *skb, struct genl_info *info)
{
	return -ENOTSUPP;
}

#endif

static int seg6_genl_set_tunsrc(struct sk_buff *skb, struct genl_info *info)
{ … }

static int seg6_genl_get_tunsrc(struct sk_buff *skb, struct genl_info *info)
{ … }

#ifdef CONFIG_IPV6_SEG6_HMAC

static int __seg6_hmac_fill_info(struct seg6_hmac_info *hinfo,
				 struct sk_buff *msg)
{ … }

static int __seg6_genl_dumphmac_element(struct seg6_hmac_info *hinfo,
					u32 portid, u32 seq, u32 flags,
					struct sk_buff *skb, u8 cmd)
{ … }

static int seg6_genl_dumphmac_start(struct netlink_callback *cb)
{ … }

static int seg6_genl_dumphmac_done(struct netlink_callback *cb)
{ … }

static int seg6_genl_dumphmac(struct sk_buff *skb, struct netlink_callback *cb)
{ … }

#else

static int seg6_genl_dumphmac_start(struct netlink_callback *cb)
{
	return 0;
}

static int seg6_genl_dumphmac_done(struct netlink_callback *cb)
{
	return 0;
}

static int seg6_genl_dumphmac(struct sk_buff *skb, struct netlink_callback *cb)
{
	return -ENOTSUPP;
}

#endif

static int __net_init seg6_net_init(struct net *net)
{ … }

static void __net_exit seg6_net_exit(struct net *net)
{ … }

static struct pernet_operations ip6_segments_ops = …;

static const struct genl_ops seg6_genl_ops[] = …;

static struct genl_family seg6_genl_family __ro_after_init = …;

int __init seg6_init(void)
{ … }

void seg6_exit(void)
{ … }