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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/include/net/ipv6.h
....@@ -1,13 +1,9 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /*
23  *	Linux INET6 implementation
34  *
45  *	Authors:
56  *	Pedro Roque		<roque@di.fc.ul.pt>
6
- *
7
- *	This program is free software; you can redistribute it and/or
8
- *      modify it under the terms of the GNU General Public License
9
- *      as published by the Free Software Foundation; either version
10
- *      2 of the License, or (at your option) any later version.
117  */
128 
139 #ifndef _NET_IPV6_H
....@@ -17,6 +13,7 @@
1713 #include <linux/hardirq.h>
1814 #include <linux/jhash.h>
1915 #include <linux/refcount.h>
16
+#include <linux/jump_label_ratelimit.h>
2017 #include <net/if_inet6.h>
2118 #include <net/ndisc.h>
2219 #include <net/flow.h>
....@@ -154,6 +151,49 @@
154151 #define	IP6_MF		0x0001
155152 #define	IP6_OFFSET	0xFFF8
156153 
154
+struct ip6_fraglist_iter {
155
+	struct ipv6hdr	*tmp_hdr;
156
+	struct sk_buff	*frag;
157
+	int		offset;
158
+	unsigned int	hlen;
159
+	__be32		frag_id;
160
+	u8		nexthdr;
161
+};
162
+
163
+int ip6_fraglist_init(struct sk_buff *skb, unsigned int hlen, u8 *prevhdr,
164
+		      u8 nexthdr, __be32 frag_id,
165
+		      struct ip6_fraglist_iter *iter);
166
+void ip6_fraglist_prepare(struct sk_buff *skb, struct ip6_fraglist_iter *iter);
167
+
168
+static inline struct sk_buff *ip6_fraglist_next(struct ip6_fraglist_iter *iter)
169
+{
170
+	struct sk_buff *skb = iter->frag;
171
+
172
+	iter->frag = skb->next;
173
+	skb_mark_not_on_list(skb);
174
+
175
+	return skb;
176
+}
177
+
178
+struct ip6_frag_state {
179
+	u8		*prevhdr;
180
+	unsigned int	hlen;
181
+	unsigned int	mtu;
182
+	unsigned int	left;
183
+	int		offset;
184
+	int		ptr;
185
+	int		hroom;
186
+	int		troom;
187
+	__be32		frag_id;
188
+	u8		nexthdr;
189
+};
190
+
191
+void ip6_frag_init(struct sk_buff *skb, unsigned int hlen, unsigned int mtu,
192
+		   unsigned short needed_tailroom, int hdr_room, u8 *prevhdr,
193
+		   u8 nexthdr, __be32 frag_id, struct ip6_frag_state *state);
194
+struct sk_buff *ip6_frag_next(struct sk_buff *skb,
195
+			      struct ip6_frag_state *state);
196
+
157197 #define IP6_REPLY_MARK(net, mark) \
158198 	((net)->ipv6.sysctl.fwmark_reflect ? (mark) : 0)
159199 
....@@ -262,6 +302,13 @@
262302 	/* Option buffer, as read by IPV6_PKTOPTIONS, starts here. */
263303 };
264304 
305
+/* flowlabel_reflect sysctl values */
306
+enum flowlabel_reflect {
307
+	FLOWLABEL_REFLECT_ESTABLISHED		= 1,
308
+	FLOWLABEL_REFLECT_TCP_RESET		= 2,
309
+	FLOWLABEL_REFLECT_ICMPV6_ECHO_REPLIES	= 4,
310
+};
311
+
265312 struct ip6_flowlabel {
266313 	struct ip6_flowlabel __rcu *next;
267314 	__be32			label;
....@@ -343,12 +390,23 @@
343390 		kfree_rcu(opt, rcu);
344391 }
345392 
346
-struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk, __be32 label);
393
+struct ip6_flowlabel *__fl6_sock_lookup(struct sock *sk, __be32 label);
394
+
395
+extern struct static_key_false_deferred ipv6_flowlabel_exclusive;
396
+static inline struct ip6_flowlabel *fl6_sock_lookup(struct sock *sk,
397
+						    __be32 label)
398
+{
399
+	if (static_branch_unlikely(&ipv6_flowlabel_exclusive.key))
400
+		return __fl6_sock_lookup(sk, label) ? : ERR_PTR(-ENOENT);
401
+
402
+	return NULL;
403
+}
404
+
347405 struct ipv6_txoptions *fl6_merge_options(struct ipv6_txoptions *opt_space,
348406 					 struct ip6_flowlabel *fl,
349407 					 struct ipv6_txoptions *fopt);
350408 void fl6_free_socklist(struct sock *sk);
351
-int ipv6_flowlabel_opt(struct sock *sk, char __user *optval, int optlen);
409
+int ipv6_flowlabel_opt(struct sock *sk, sockptr_t optval, int optlen);
352410 int ipv6_flowlabel_opt_get(struct sock *sk, struct in6_flowlabel_req *freq,
353411 			   int flags);
354412 int ip6_flowlabel_init(void);
....@@ -638,6 +696,11 @@
638696 					cpu_to_be32(0x0000ffff))) == 0UL;
639697 }
640698 
699
+static inline bool ipv6_addr_v4mapped_loopback(const struct in6_addr *a)
700
+{
701
+	return ipv6_addr_v4mapped(a) && ipv4_is_loopback(a->s6_addr32[3]);
702
+}
703
+
641704 static inline u32 ipv6_portaddr_hash(const struct net *net,
642705 				     const struct in6_addr *addr6,
643706 				     unsigned int port)
....@@ -776,7 +839,7 @@
776839 	BUILD_BUG_ON(offsetof(typeof(flow->addrs), v6addrs.dst) !=
777840 		     offsetof(typeof(flow->addrs), v6addrs.src) +
778841 		     sizeof(flow->addrs.v6addrs.src));
779
-	memcpy(&flow->addrs.v6addrs, &iph->saddr, sizeof(flow->addrs.v6addrs));
842
+	memcpy(&flow->addrs.v6addrs, &iph->addrs, sizeof(flow->addrs.v6addrs));
780843 	flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
781844 }
782845 
....@@ -845,7 +908,6 @@
845908 	}
846909 }
847910 #else
848
-static inline void ip6_set_txhash(struct sock *sk) { }
849911 static inline __be32 ip6_make_flowlabel(struct net *net, struct sk_buff *skb,
850912 					__be32 flowlabel, bool autolabel,
851913 					struct flowi6 *fl6)
....@@ -923,7 +985,7 @@
923985  *	upper-layer output functions
924986  */
925987 int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
926
-	     __u32 mark, struct ipv6_txoptions *opt, int tclass);
988
+	     __u32 mark, struct ipv6_txoptions *opt, int tclass, u32 priority);
927989 
928990 int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
929991 
....@@ -964,6 +1026,12 @@
9641026 struct dst_entry *ip6_sk_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
9651027 					 const struct in6_addr *final_dst,
9661028 					 bool connected);
1029
+struct dst_entry *ip6_dst_lookup_tunnel(struct sk_buff *skb,
1030
+					struct net_device *dev,
1031
+					struct net *net, struct socket *sock,
1032
+					struct in6_addr *saddr,
1033
+					const struct ip_tunnel_info *info,
1034
+					u8 protocol, bool use_cache);
9671035 struct dst_entry *ip6_blackhole_route(struct net *net,
9681036 				      struct dst_entry *orig_dst);
9691037 
....@@ -975,6 +1043,8 @@
9751043 int ip6_forward(struct sk_buff *skb);
9761044 int ip6_input(struct sk_buff *skb);
9771045 int ip6_mc_input(struct sk_buff *skb);
1046
+void ip6_protocol_deliver_rcu(struct net *net, struct sk_buff *skb, int nexthdr,
1047
+			      bool have_final);
9781048 
9791049 int __ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
9801050 int ip6_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
....@@ -1014,14 +1084,10 @@
10141084  *	socket options (ipv6_sockglue.c)
10151085  */
10161086 
1017
-int ipv6_setsockopt(struct sock *sk, int level, int optname,
1018
-		    char __user *optval, unsigned int optlen);
1087
+int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
1088
+		    unsigned int optlen);
10191089 int ipv6_getsockopt(struct sock *sk, int level, int optname,
10201090 		    char __user *optval, int __user *optlen);
1021
-int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
1022
-			   char __user *optval, unsigned int optlen);
1023
-int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
1024
-			   char __user *optval, int __user *optlen);
10251091 
10261092 int __ip6_datagram_connect(struct sock *sk, struct sockaddr *addr,
10271093 			   int addr_len);
....@@ -1045,9 +1111,14 @@
10451111 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
10461112 		  int peer);
10471113 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
1114
+int inet6_compat_ioctl(struct socket *sock, unsigned int cmd,
1115
+		unsigned long arg);
10481116 
10491117 int inet6_hash_connect(struct inet_timewait_death_row *death_row,
10501118 			      struct sock *sk);
1119
+int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size);
1120
+int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
1121
+		  int flags);
10511122 
10521123 /*
10531124  * reassembly.c
....@@ -1061,9 +1132,10 @@
10611132 
10621133 int ip6_mc_source(int add, int omode, struct sock *sk,
10631134 		  struct group_source_req *pgsr);
1064
-int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf);
1135
+int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf,
1136
+		  struct sockaddr_storage *list);
10651137 int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
1066
-		  struct group_filter __user *optval, int __user *optlen);
1138
+		  struct sockaddr_storage __user *p);
10671139 
10681140 #ifdef CONFIG_PROC_FS
10691141 int ac6_proc_init(struct net *net);
....@@ -1089,8 +1161,6 @@
10891161 #endif
10901162 
10911163 #ifdef CONFIG_SYSCTL
1092
-extern struct ctl_table ipv6_route_table_template[];
1093
-
10941164 struct ctl_table *ipv6_icmp_sysctl_init(struct net *net);
10951165 struct ctl_table *ipv6_route_sysctl_init(struct net *net);
10961166 int ipv6_sysctl_register(void);
....@@ -1103,4 +1173,96 @@
11031173 			  const struct in6_addr *addr, unsigned int mode);
11041174 int ipv6_sock_mc_drop(struct sock *sk, int ifindex,
11051175 		      const struct in6_addr *addr);
1176
+
1177
+static inline int ip6_sock_set_v6only(struct sock *sk)
1178
+{
1179
+	if (inet_sk(sk)->inet_num)
1180
+		return -EINVAL;
1181
+	lock_sock(sk);
1182
+	sk->sk_ipv6only = true;
1183
+	release_sock(sk);
1184
+	return 0;
1185
+}
1186
+
1187
+static inline void ip6_sock_set_recverr(struct sock *sk)
1188
+{
1189
+	lock_sock(sk);
1190
+	inet6_sk(sk)->recverr = true;
1191
+	release_sock(sk);
1192
+}
1193
+
1194
+static inline int __ip6_sock_set_addr_preferences(struct sock *sk, int val)
1195
+{
1196
+	unsigned int pref = 0;
1197
+	unsigned int prefmask = ~0;
1198
+
1199
+	/* check PUBLIC/TMP/PUBTMP_DEFAULT conflicts */
1200
+	switch (val & (IPV6_PREFER_SRC_PUBLIC |
1201
+		       IPV6_PREFER_SRC_TMP |
1202
+		       IPV6_PREFER_SRC_PUBTMP_DEFAULT)) {
1203
+	case IPV6_PREFER_SRC_PUBLIC:
1204
+		pref |= IPV6_PREFER_SRC_PUBLIC;
1205
+		prefmask &= ~(IPV6_PREFER_SRC_PUBLIC |
1206
+			      IPV6_PREFER_SRC_TMP);
1207
+		break;
1208
+	case IPV6_PREFER_SRC_TMP:
1209
+		pref |= IPV6_PREFER_SRC_TMP;
1210
+		prefmask &= ~(IPV6_PREFER_SRC_PUBLIC |
1211
+			      IPV6_PREFER_SRC_TMP);
1212
+		break;
1213
+	case IPV6_PREFER_SRC_PUBTMP_DEFAULT:
1214
+		prefmask &= ~(IPV6_PREFER_SRC_PUBLIC |
1215
+			      IPV6_PREFER_SRC_TMP);
1216
+		break;
1217
+	case 0:
1218
+		break;
1219
+	default:
1220
+		return -EINVAL;
1221
+	}
1222
+
1223
+	/* check HOME/COA conflicts */
1224
+	switch (val & (IPV6_PREFER_SRC_HOME | IPV6_PREFER_SRC_COA)) {
1225
+	case IPV6_PREFER_SRC_HOME:
1226
+		prefmask &= ~IPV6_PREFER_SRC_COA;
1227
+		break;
1228
+	case IPV6_PREFER_SRC_COA:
1229
+		pref |= IPV6_PREFER_SRC_COA;
1230
+		break;
1231
+	case 0:
1232
+		break;
1233
+	default:
1234
+		return -EINVAL;
1235
+	}
1236
+
1237
+	/* check CGA/NONCGA conflicts */
1238
+	switch (val & (IPV6_PREFER_SRC_CGA|IPV6_PREFER_SRC_NONCGA)) {
1239
+	case IPV6_PREFER_SRC_CGA:
1240
+	case IPV6_PREFER_SRC_NONCGA:
1241
+	case 0:
1242
+		break;
1243
+	default:
1244
+		return -EINVAL;
1245
+	}
1246
+
1247
+	inet6_sk(sk)->srcprefs = (inet6_sk(sk)->srcprefs & prefmask) | pref;
1248
+	return 0;
1249
+}
1250
+
1251
+static inline int ip6_sock_set_addr_preferences(struct sock *sk, bool val)
1252
+{
1253
+	int ret;
1254
+
1255
+	lock_sock(sk);
1256
+	ret = __ip6_sock_set_addr_preferences(sk, val);
1257
+	release_sock(sk);
1258
+	return ret;
1259
+}
1260
+
1261
+static inline void ip6_sock_set_recvpktinfo(struct sock *sk)
1262
+{
1263
+	lock_sock(sk);
1264
+	inet6_sk(sk)->rxopt.bits.rxinfo = true;
1265
+	release_sock(sk);
1266
+}
1267
+
11061268 #endif /* _NET_IPV6_H */