1 /* SPDX-License-Identifier: GPL-2.0-or-later */
32 #define NEXTHDR_HOP		0	/* Hop-by-hop option header. */
52 /* Limits on Hop-by-Hop and Destination options.
55  * Hop-by-Hop or Destination options other then the packet must fit in an MTU.
60  *   - Limit the number of options in a Hop-by-Hop or Destination options
62  *   - Limit the byte length of a Hop-by-Hop or Destination options extension
64  *   - Disallow unknown options
74  * options or Hop-by-Hop options. If the number is less than zero then unknown
79  * Hop-by-Hop options extension header. Setting the value to INT_MAX
86 /* Default limits for Hop-by-Hop and Destination options */
95  *	type	-	unicast | multicast
96  *	scope	-	local	| site	    | global
97  *	v4	-	compat
122 	((a)->s6_addr[1] & 0x0f)	/* nonstandard */
123 #define __IPV6_ADDR_SCOPE_INVALID	-1
134 	((a)->s6_addr[1] & 0x10)
136 	((a)->s6_addr[1] & 0x20)
138 	((a)->s6_addr[1] & 0x40)
157 	int		offset;  member
170 	struct sk_buff *skb = iter->frag;  in ip6_fraglist_next()
172 	iter->frag = skb->next;  in ip6_fraglist_next()
183 	int		offset;  member
198 	((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
210 		mod##SNMP_INC_STATS64((_idev)->stats.statname, (field));\
211 	mod##SNMP_INC_STATS64((net)->mib.statname##_statistics, (field));\
219 		SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
220 	mod##SNMP_INC_STATS((net)->mib.statname##_statistics, (field));\
228 		SNMP_INC_STATS_ATOMIC_LONG((_idev)->stats.statname##dev, (field)); \
229 	SNMP_INC_STATS_ATOMIC_LONG((net)->mib.statname##_statistics, (field));\
236 		mod##SNMP_ADD_STATS((_idev)->stats.statname, (field), (val)); \
237 	mod##SNMP_ADD_STATS((net)->mib.statname##_statistics, (field), (val));\
244 		mod##SNMP_UPD_PO_STATS((_idev)->stats.statname, field, (val)); \
245 	mod##SNMP_UPD_PO_STATS((net)->mib.statname##_statistics, field, (val));\
301 	struct rcu_head		rcu;  member
319 	struct rcu_head		rcu;  member
340 	struct rcu_head			rcu;  member
355 		.hlimit = -1,  in ipcm6_init()
356 		.tclass = -1,  in ipcm6_init()
357 		.dontfrag = -1,  in ipcm6_init()
365 		.hlimit = -1,  in ipcm6_init_sk()
366 		.tclass = np->tclass,  in ipcm6_init_sk()
367 		.dontfrag = np->dontfrag,  in ipcm6_init_sk()
376 	opt = rcu_dereference(np->opt);  in txopt_get()
378 		if (!refcount_inc_not_zero(&opt->refcnt))  in txopt_get()
389 	if (opt && refcount_dec_and_test(&opt->refcnt))  in txopt_put()
390 		kfree_rcu(opt, rcu);  in txopt_put()
400 		return __fl6_sock_lookup(sk, label) ? : ERR_PTR(-ENOENT);  in fl6_sock_lookup()
419 		atomic_dec(&fl->users);  in fl6_sock_release()
450 	return idev->cnf.forwarding ? idev->cnf.accept_ra == 2 :  in ipv6_accept_ra()
451 	    idev->cnf.accept_ra;  in ipv6_accept_ra()
508 	return !!(((a1->s6_addr32[0] ^ a2->s6_addr32[0]) & m->s6_addr32[0]) |  in ipv6_masked_addr_cmp()
509 		  ((a1->s6_addr32[1] ^ a2->s6_addr32[1]) & m->s6_addr32[1]) |  in ipv6_masked_addr_cmp()
510 		  ((a1->s6_addr32[2] ^ a2->s6_addr32[2]) & m->s6_addr32[2]) |  in ipv6_masked_addr_cmp()
511 		  ((a1->s6_addr32[3] ^ a2->s6_addr32[3]) & m->s6_addr32[3]));  in ipv6_masked_addr_cmp()
523 	memset(pfx->s6_addr, 0, sizeof(pfx->s6_addr));  in ipv6_addr_prefix()
524 	memcpy(pfx->s6_addr, addr, o);  in ipv6_addr_prefix()
526 		pfx->s6_addr[o] = addr->s6_addr[o] & (0xff00 >> b);  in ipv6_addr_prefix()
537 	memcpy(addr->s6_addr, pfx, o);  in ipv6_addr_prefix_copy()
539 		addr->s6_addr[o] &= ~(0xff00 >> b);  in ipv6_addr_prefix_copy()
540 		addr->s6_addr[o] |= (pfx->s6_addr[o] & (0xff00 >> b));  in ipv6_addr_prefix_copy()
568 	__ipv6_addr_set_half(&addr->s6_addr32[0], w1, w2);  in ipv6_addr_set()
569 	__ipv6_addr_set_half(&addr->s6_addr32[2], w3, w4);  in ipv6_addr_set()
581 	return ((a1->s6_addr32[0] ^ a2->s6_addr32[0]) |  in ipv6_addr_equal()
582 		(a1->s6_addr32[1] ^ a2->s6_addr32[1]) |  in ipv6_addr_equal()
583 		(a1->s6_addr32[2] ^ a2->s6_addr32[2]) |  in ipv6_addr_equal()
584 		(a1->s6_addr32[3] ^ a2->s6_addr32[3])) == 0;  in ipv6_addr_equal()
593 	if (len && ((*a1 ^ *a2) & cpu_to_be64((~0UL) << (64 - len))))  in __ipv6_prefix_equal64_half()
608 		return __ipv6_prefix_equal64_half(a1 + 1, a2 + 1, prefixlen - 64);  in ipv6_prefix_equal()
617 	const __be32 *a1 = addr1->s6_addr32;  in ipv6_prefix_equal()
618 	const __be32 *a2 = addr2->s6_addr32;  in ipv6_prefix_equal()
628 	if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))  in ipv6_prefix_equal()
642 	return (a->s6_addr32[0] | a->s6_addr32[1] |  in ipv6_addr_any()
643 		a->s6_addr32[2] | a->s6_addr32[3]) == 0;  in ipv6_addr_any()
655 	return (__force u32)(a->s6_addr32[0] ^ a->s6_addr32[1] ^  in ipv6_addr_hash()
656 			     a->s6_addr32[2] ^ a->s6_addr32[3]);  in ipv6_addr_hash()
663 	u32 v = (__force u32)a->s6_addr32[0] ^ (__force u32)a->s6_addr32[1];  in __ipv6_addr_jhash()
666 			    (__force u32)a->s6_addr32[2],  in __ipv6_addr_jhash()
667 			    (__force u32)a->s6_addr32[3],  in __ipv6_addr_jhash()
678 	return (a->s6_addr32[0] | a->s6_addr32[1] |  in ipv6_addr_loopback()
679 		a->s6_addr32[2] | (a->s6_addr32[3] ^ cpu_to_be32(1))) == 0;  in ipv6_addr_loopback()
685  * since all of the endian-annotated types are fixed size regardless of arch.
693 		(__force unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |  in ipv6_addr_v4mapped()
695 		(__force unsigned long)(a->s6_addr32[2] ^  in ipv6_addr_v4mapped()
701 	return ipv6_addr_v4mapped(a) && ipv4_is_loopback(a->s6_addr32[3]);  in ipv6_addr_v4mapped_loopback()
713 		hash = jhash_1word((__force u32)addr6->s6_addr32[3], mix);  in ipv6_portaddr_hash()
715 		hash = jhash2((__force u32 *)addr6->s6_addr32, 4, mix);  in ipv6_portaddr_hash()
726 	return (a->s6_addr32[0] & htonl(0xfffffff0)) == htonl(0x20010010);  in ipv6_addr_orchid()
731 	return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000);  in ipv6_addr_is_multicast()
757 			return i * 32 + 31 - __fls(ntohl(xb));  in __ipv6_addr_diff32()
774 	 *					--ANK (980803)  in __ipv6_addr_diff32()
790 			return i * 64 + 63 - __fls(be64_to_cpu(xb));  in __ipv6_addr_diff64()
823 	if (ipv6_addr_is_multicast(&fl6->daddr))  in ip6_sk_dst_hoplimit()
824 		hlimit = np->mcast_hops;  in ip6_sk_dst_hoplimit()
826 		hlimit = np->hop_limit;  in ip6_sk_dst_hoplimit()
833  * Equivalent to :	flow->v6addrs.src = iph->saddr;
834  *			flow->v6addrs.dst = iph->daddr;
839 	BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) !=  in iph_to_flow_copy_v6addrs()
840 		     offsetof(typeof(flow->addrs), v6addrs.src) +  in iph_to_flow_copy_v6addrs()
841 		     sizeof(flow->addrs.v6addrs.src));  in iph_to_flow_copy_v6addrs()
842 	memcpy(&flow->addrs.v6addrs, &iph->addrs, sizeof(flow->addrs.v6addrs));  in iph_to_flow_copy_v6addrs()
843 	flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;  in iph_to_flow_copy_v6addrs()
851 	return net->ipv6.sysctl.ip_nonlocal_bind ||  in ipv6_can_nonlocal_bind()
852 		inet->freebind || inet->transparent;  in ipv6_can_nonlocal_bind()
877 	    net->ipv6.sysctl.auto_flowlabels == IP6_AUTO_FLOW_LABEL_OFF ||  in ip6_make_flowlabel()
879 	     net->ipv6.sysctl.auto_flowlabels != IP6_AUTO_FLOW_LABEL_FORCED))  in ip6_make_flowlabel()
892 	if (net->ipv6.sysctl.flowlabel_state_ranges)  in ip6_make_flowlabel()
900 	switch (net->ipv6.sysctl.auto_flowlabels) {  in ip6_default_np_autolabel()
926 	return net->ipv6.sysctl.multipath_hash_policy;  in ip6_multipath_hash_policy()
966 	return fl6->flowlabel & IPV6_FLOWLABEL_MASK;  in flowi6_get_flowlabel()
985  *	upper-layer output functions
993 		    int getfrag(void *from, char *to, int offset, int len,
1009 			     int getfrag(void *from, char *to, int offset,
1018 	return __ip6_make_skb(sk, &sk->sk_write_queue, &inet_sk(sk)->cork,  in ip6_finish_skb()
1019 			      &inet6_sk(sk)->cork);  in ip6_finish_skb()
1073 /* find specified header and get offset to it */
1074 int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, int target,
1077 int ipv6_find_tlv(const struct sk_buff *skb, int offset, int type);
1179 	if (inet_sk(sk)->inet_num)  in ip6_sock_set_v6only()
1180 		return -EINVAL;  in ip6_sock_set_v6only()
1182 	sk->sk_ipv6only = true;  in ip6_sock_set_v6only()
1190 	inet6_sk(sk)->recverr = true;  in ip6_sock_set_recverr()
1220 		return -EINVAL;  in __ip6_sock_set_addr_preferences()
1234 		return -EINVAL;  in __ip6_sock_set_addr_preferences()
1244 		return -EINVAL;  in __ip6_sock_set_addr_preferences()
1247 	inet6_sk(sk)->srcprefs = (inet6_sk(sk)->srcprefs & prefmask) | pref;  in __ip6_sock_set_addr_preferences()
1264 	inet6_sk(sk)->rxopt.bits.rxinfo = true;  in ip6_sock_set_recvpktinfo()