#include <linux/skbuff.h>
#include <net/inet_sock.h>
+#include <net/route.h>
#include <net/snmp.h>
#include <net/flow.h>
+#include <net/flow_dissector.h>
struct sock;
struct ip_options opt; /* Compiled IP options */
unsigned char flags;
-#define IPSKB_FORWARDED 1
-#define IPSKB_XFRM_TUNNEL_SIZE 2
-#define IPSKB_XFRM_TRANSFORMED 4
-#define IPSKB_FRAG_COMPLETE 8
-#define IPSKB_REROUTED 16
+#define IPSKB_FORWARDED BIT(0)
+#define IPSKB_XFRM_TUNNEL_SIZE BIT(1)
+#define IPSKB_XFRM_TRANSFORMED BIT(2)
+#define IPSKB_FRAG_COMPLETE BIT(3)
+#define IPSKB_REROUTED BIT(4)
+#define IPSKB_DOREDIRECT BIT(5)
+#define IPSKB_FRAG_PMTU BIT(6)
u16 frag_max_size;
};
int oif;
struct ip_options_rcu *opt;
__u8 tx_flags;
+ __u8 ttl;
+ __s16 tos;
+ char priority;
};
#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
+#define PKTINFO_SKB_CB(skb) ((struct in_pktinfo *)((skb)->cb))
struct ip_ra_chain {
struct ip_ra_chain __rcu *next;
struct rtable;
struct sockaddr;
-extern int igmp_mc_proc_init(void);
+int igmp_mc_init(void);
/*
* Functions provided by ip.c
*/
-extern int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
- __be32 saddr, __be32 daddr,
- struct ip_options_rcu *opt);
-extern int ip_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *pt, struct net_device *orig_dev);
-extern int ip_local_deliver(struct sk_buff *skb);
-extern int ip_mr_input(struct sk_buff *skb);
-extern int ip_output(struct sk_buff *skb);
-extern int ip_mc_output(struct sk_buff *skb);
-extern int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
-extern int ip_do_nat(struct sk_buff *skb);
-extern void ip_send_check(struct iphdr *ip);
-extern int __ip_local_out(struct sk_buff *skb);
-extern int ip_local_out(struct sk_buff *skb);
-extern int ip_queue_xmit(struct sk_buff *skb, struct flowi *fl);
-extern void ip_init(void);
-extern int ip_append_data(struct sock *sk, struct flowi4 *fl4,
- int getfrag(void *from, char *to, int offset, int len,
- int odd, struct sk_buff *skb),
- void *from, int len, int protolen,
- struct ipcm_cookie *ipc,
- struct rtable **rt,
- unsigned int flags);
-extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb);
-extern ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
- int offset, size_t size, int flags);
-extern struct sk_buff *__ip_make_skb(struct sock *sk,
- struct flowi4 *fl4,
- struct sk_buff_head *queue,
- struct inet_cork *cork);
-extern int ip_send_skb(struct net *net, struct sk_buff *skb);
-extern int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4);
-extern void ip_flush_pending_frames(struct sock *sk);
-extern struct sk_buff *ip_make_skb(struct sock *sk,
- struct flowi4 *fl4,
- int getfrag(void *from, char *to, int offset, int len,
- int odd, struct sk_buff *skb),
- void *from, int length, int transhdrlen,
- struct ipcm_cookie *ipc,
- struct rtable **rtp,
- unsigned int flags);
+int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
+ __be32 saddr, __be32 daddr,
+ struct ip_options_rcu *opt);
+int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
+ struct net_device *orig_dev);
+int ip_local_deliver(struct sk_buff *skb);
+int ip_mr_input(struct sk_buff *skb);
+int ip_output(struct net *net, struct sock *sk, struct sk_buff *skb);
+int ip_mc_output(struct net *net, struct sock *sk, struct sk_buff *skb);
+int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
+ int (*output)(struct net *, struct sock *, struct sk_buff *));
+void ip_send_check(struct iphdr *ip);
+int __ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
+int ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb);
+
+int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
+void ip_init(void);
+int ip_append_data(struct sock *sk, struct flowi4 *fl4,
+ int getfrag(void *from, char *to, int offset, int len,
+ int odd, struct sk_buff *skb),
+ void *from, int len, int protolen,
+ struct ipcm_cookie *ipc,
+ struct rtable **rt,
+ unsigned int flags);
+int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd,
+ struct sk_buff *skb);
+ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
+ int offset, size_t size, int flags);
+struct sk_buff *__ip_make_skb(struct sock *sk, struct flowi4 *fl4,
+ struct sk_buff_head *queue,
+ struct inet_cork *cork);
+int ip_send_skb(struct net *net, struct sk_buff *skb);
+int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4);
+void ip_flush_pending_frames(struct sock *sk);
+struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4,
+ int getfrag(void *from, char *to, int offset,
+ int len, int odd, struct sk_buff *skb),
+ void *from, int length, int transhdrlen,
+ struct ipcm_cookie *ipc, struct rtable **rtp,
+ unsigned int flags);
static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)
{
return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
}
+static inline __u8 get_rttos(struct ipcm_cookie* ipc, struct inet_sock *inet)
+{
+ return (ipc->tos != -1) ? RT_TOS(ipc->tos) : RT_TOS(inet->tos);
+}
+
+static inline __u8 get_rtconn_flags(struct ipcm_cookie* ipc, struct sock* sk)
+{
+ return (ipc->tos != -1) ? RT_CONN_FLAGS_TOS(sk, ipc->tos) : RT_CONN_FLAGS(sk);
+}
+
/* datagram.c */
-extern int ip4_datagram_connect(struct sock *sk,
- struct sockaddr *uaddr, int addr_len);
+int __ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
+int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
-extern void ip4_datagram_release_cb(struct sock *sk);
+void ip4_datagram_release_cb(struct sock *sk);
struct ip_reply_arg {
struct kvec iov[1];
/* -1 if not needed */
int bound_dev_if;
u8 tos;
+ kuid_t uid;
};
#define IP_REPLY_ARG_NOSRCCHECK 1
return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0;
}
-void ip_send_unicast_reply(struct net *net, struct sk_buff *skb, __be32 daddr,
- __be32 saddr, const struct ip_reply_arg *arg,
+void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
+ const struct ip_options *sopt,
+ __be32 daddr, __be32 saddr,
+ const struct ip_reply_arg *arg,
unsigned int len);
-struct ipv4_config {
- int log_martians;
- int no_pmtu_disc;
-};
-
-extern struct ipv4_config ipv4_config;
#define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field)
#define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field)
#define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val)
#define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field)
#define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field)
#define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field)
+#define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd)
#define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd)
#define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd)
-extern unsigned long snmp_fold_field(void __percpu *mib[], int offt);
+u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offct);
+unsigned long snmp_fold_field(void __percpu *mib, int offt);
#if BITS_PER_LONG==32
-extern u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t sync_off);
+u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,
+ size_t syncp_offset);
+u64 snmp_fold_field64(void __percpu *mib, int offt, size_t sync_off);
#else
-static inline u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_off)
+static inline u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,
+ size_t syncp_offset)
+{
+ return snmp_get_cpu_field(mib, cpu, offct);
+
+}
+
+static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off)
{
return snmp_fold_field(mib, offt);
}
#endif
-extern int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align);
-extern void snmp_mib_free(void __percpu *ptr[2]);
-extern struct local_ports {
- seqlock_t lock;
- int range[2];
-} sysctl_local_ports;
-extern void inet_get_local_port_range(int *low, int *high);
+void inet_get_local_port_range(struct net *net, int *low, int *high);
+
+#ifdef CONFIG_SYSCTL
+static inline int inet_is_local_reserved_port(struct net *net, int port)
+{
+ if (!net->ipv4.sysctl_local_reserved_ports)
+ return 0;
+ return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
+}
-extern unsigned long *sysctl_local_reserved_ports;
-static inline int inet_is_reserved_local_port(int port)
+static inline bool sysctl_dev_name_is_allowed(const char *name)
{
- return test_bit(port, sysctl_local_reserved_ports);
+ return strcmp(name, "default") != 0 && strcmp(name, "all") != 0;
}
-extern int sysctl_ip_nonlocal_bind;
+#else
+static inline int inet_is_local_reserved_port(struct net *net, int port)
+{
+ return 0;
+}
+#endif
/* From inetpeer.c */
extern int inet_peer_threshold;
/* From ip_output.c */
extern int sysctl_ip_dynaddr;
-extern void ipfrag_init(void);
+void ipfrag_init(void);
-extern void ip_static_sysctl_init(void);
+void ip_static_sysctl_init(void);
+
+#define IP4_REPLY_MARK(net, mark) \
+ ((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0)
static inline bool ip_is_fragment(const struct iphdr *iph)
{
}
static inline
-int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
+int ip_dont_fragment(const struct sock *sk, const struct dst_entry *dst)
{
- return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO ||
- (inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT &&
+ u8 pmtudisc = READ_ONCE(inet_sk(sk)->pmtudisc);
+
+ return pmtudisc == IP_PMTUDISC_DO ||
+ (pmtudisc == IP_PMTUDISC_WANT &&
!(dst_metric_locked(dst, RTAX_MTU)));
}
-extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more);
+static inline bool ip_sk_accept_pmtu(const struct sock *sk)
+{
+ return inet_sk(sk)->pmtudisc != IP_PMTUDISC_INTERFACE &&
+ inet_sk(sk)->pmtudisc != IP_PMTUDISC_OMIT;
+}
+
+static inline bool ip_sk_use_pmtu(const struct sock *sk)
+{
+ return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
+}
+
+static inline bool ip_sk_ignore_df(const struct sock *sk)
+{
+ return inet_sk(sk)->pmtudisc < IP_PMTUDISC_DO ||
+ inet_sk(sk)->pmtudisc == IP_PMTUDISC_OMIT;
+}
-static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk)
+static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst,
+ bool forwarding)
{
- if (iph->frag_off & htons(IP_DF)) {
+ struct net *net = dev_net(dst->dev);
+
+ if (net->ipv4.sysctl_ip_fwd_use_pmtu ||
+ dst_metric_locked(dst, RTAX_MTU) ||
+ !forwarding)
+ return dst_mtu(dst);
+
+ return min(dst->dev->mtu, IP_MAX_MTU);
+}
+
+static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb)
+{
+ struct sock *sk = skb->sk;
+
+ if (!sk || !sk_fullsock(sk) || ip_sk_use_pmtu(sk)) {
+ bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED;
+
+ return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding);
+ }
+
+ return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU);
+}
+
+u32 ip_idents_reserve(u32 hash, int segs);
+void __ip_select_ident(struct net *net, struct iphdr *iph, int segs);
+
+static inline void ip_select_ident_segs(struct net *net, struct sk_buff *skb,
+ struct sock *sk, int segs)
+{
+ struct iphdr *iph = ip_hdr(skb);
+
+ if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_df) {
/* This is only to work around buggy Windows95/2000
* VJ compression implementations. If the ID field
* does not change, they drop every other packet in
* a TCP stream using header compression.
*/
- iph->id = (sk && inet_sk(sk)->inet_daddr) ?
- htons(inet_sk(sk)->inet_id++) : 0;
- } else
- __ip_select_ident(iph, dst, 0);
-}
-
-static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more)
-{
- if (iph->frag_off & htons(IP_DF)) {
if (sk && inet_sk(sk)->inet_daddr) {
iph->id = htons(inet_sk(sk)->inet_id);
- inet_sk(sk)->inet_id += 1 + more;
- } else
+ inet_sk(sk)->inet_id += segs;
+ } else {
iph->id = 0;
- } else
- __ip_select_ident(iph, dst, more);
+ }
+ } else {
+ __ip_select_ident(net, iph, segs);
+ }
+}
+
+static inline void ip_select_ident(struct net *net, struct sk_buff *skb,
+ struct sock *sk)
+{
+ ip_select_ident_segs(net, skb, sk, 1);
+}
+
+static inline __wsum inet_compute_pseudo(struct sk_buff *skb, int proto)
+{
+ return csum_tcpudp_nofold(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr,
+ skb->len, proto, 0);
+}
+
+/* copy IPv4 saddr & daddr to flow_keys, possibly using 64bit load/store
+ * Equivalent to : flow->v4addrs.src = iph->saddr;
+ * flow->v4addrs.dst = iph->daddr;
+ */
+static inline void iph_to_flow_copy_v4addrs(struct flow_keys *flow,
+ const struct iphdr *iph)
+{
+ BUILD_BUG_ON(offsetof(typeof(flow->addrs), v4addrs.dst) !=
+ offsetof(typeof(flow->addrs), v4addrs.src) +
+ sizeof(flow->addrs.v4addrs.src));
+ memcpy(&flow->addrs.v4addrs, &iph->saddr, sizeof(flow->addrs.v4addrs));
+ flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
+}
+
+static inline __wsum inet_gro_compute_pseudo(struct sk_buff *skb, int proto)
+{
+ const struct iphdr *iph = skb_gro_network_header(skb);
+
+ return csum_tcpudp_nofold(iph->saddr, iph->daddr,
+ skb_gro_len(skb), proto, 0);
}
/*
struct ipv6_pinfo *np = inet6_sk(sk);
memset(&np->saddr, 0, sizeof(np->saddr));
- memset(&np->rcv_saddr, 0, sizeof(np->rcv_saddr));
+ memset(&sk->sk_v6_rcv_saddr, 0, sizeof(sk->sk_v6_rcv_saddr));
}
#endif
}
#endif
-static inline int sk_mc_loop(struct sock *sk)
+static inline unsigned int ipv4_addr_hash(__be32 ip)
{
- if (!sk)
- return 1;
- switch (sk->sk_family) {
- case AF_INET:
- return inet_sk(sk)->mc_loop;
-#if IS_ENABLED(CONFIG_IPV6)
- case AF_INET6:
- return inet6_sk(sk)->mc_loop;
-#endif
- }
- WARN_ON(1);
- return 1;
+ return (__force unsigned int) ip;
}
-extern bool ip_call_ra_chain(struct sk_buff *skb);
+bool ip_call_ra_chain(struct sk_buff *skb);
/*
* Functions provided by ip_fragment.c
IP_DEFRAG_MACVLAN,
};
-int ip_defrag(struct sk_buff *skb, u32 user);
+/* Return true if the value of 'user' is between 'lower_bond'
+ * and 'upper_bond' inclusively.
+ */
+static inline bool ip_defrag_user_in_between(u32 user,
+ enum ip_defrag_users lower_bond,
+ enum ip_defrag_users upper_bond)
+{
+ return user >= lower_bond && user <= upper_bond;
+}
+
+int ip_defrag(struct net *net, struct sk_buff *skb, u32 user);
#ifdef CONFIG_INET
-struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user);
+struct sk_buff *ip_check_defrag(struct net *net, struct sk_buff *skb, u32 user);
#else
-static inline struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
+static inline struct sk_buff *ip_check_defrag(struct net *net, struct sk_buff *skb, u32 user)
{
return skb;
}
#endif
int ip_frag_mem(struct net *net);
-int ip_frag_nqueues(struct net *net);
/*
* Functions provided by ip_forward.c
*/
-extern int ip_forward(struct sk_buff *skb);
+int ip_forward(struct sk_buff *skb);
/*
* Functions provided by ip_options.c
*/
-extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
- __be32 daddr, struct rtable *rt, int is_frag);
-extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb);
-extern void ip_options_fragment(struct sk_buff *skb);
-extern int ip_options_compile(struct net *net,
- struct ip_options *opt, struct sk_buff *skb);
-extern int ip_options_get(struct net *net, struct ip_options_rcu **optp,
- unsigned char *data, int optlen);
-extern int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
- unsigned char __user *data, int optlen);
-extern void ip_options_undo(struct ip_options * opt);
-extern void ip_forward_options(struct sk_buff *skb);
-extern int ip_options_rcv_srr(struct sk_buff *skb);
+void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
+ __be32 daddr, struct rtable *rt, int is_frag);
+
+int __ip_options_echo(struct ip_options *dopt, struct sk_buff *skb,
+ const struct ip_options *sopt);
+static inline int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb)
+{
+ return __ip_options_echo(dopt, skb, &IPCB(skb)->opt);
+}
+
+void ip_options_fragment(struct sk_buff *skb);
+int ip_options_compile(struct net *net, struct ip_options *opt,
+ struct sk_buff *skb);
+int ip_options_get(struct net *net, struct ip_options_rcu **optp,
+ unsigned char *data, int optlen);
+int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
+ unsigned char __user *data, int optlen);
+void ip_options_undo(struct ip_options *opt);
+void ip_forward_options(struct sk_buff *skb);
+int ip_options_rcv_srr(struct sk_buff *skb);
/*
* Functions provided by ip_sockglue.c
*/
-extern void ipv4_pktinfo_prepare(struct sk_buff *skb);
-extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
-extern int ip_cmsg_send(struct net *net,
- struct msghdr *msg, struct ipcm_cookie *ipc);
-extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen);
-extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen);
-extern int compat_ip_setsockopt(struct sock *sk, int level,
- int optname, char __user *optval, unsigned int optlen);
-extern int compat_ip_getsockopt(struct sock *sk, int level,
- int optname, char __user *optval, int __user *optlen);
-extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *));
-
-extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len);
-extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
- __be16 port, u32 info, u8 *payload);
-extern void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
- u32 info);
+void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb);
+void ip_cmsg_recv_offset(struct msghdr *msg, struct sk_buff *skb, int offset);
+int ip_cmsg_send(struct net *net, struct msghdr *msg,
+ struct ipcm_cookie *ipc, bool allow_ipv6);
+int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
+ unsigned int optlen);
+int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
+ int __user *optlen);
+int compat_ip_setsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, unsigned int optlen);
+int compat_ip_getsockopt(struct sock *sk, int level, int optname,
+ char __user *optval, int __user *optlen);
+int ip_ra_control(struct sock *sk, unsigned char on,
+ void (*destructor)(struct sock *));
+
+int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len);
+void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
+ u32 info, u8 *payload);
+void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
+ u32 info);
+
+static inline void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
+{
+ ip_cmsg_recv_offset(msg, skb, 0);
+}
+
+bool icmp_global_allow(void);
+extern int sysctl_icmp_msgs_per_sec;
+extern int sysctl_icmp_msgs_burst;
#ifdef CONFIG_PROC_FS
-extern int ip_misc_proc_init(void);
+int ip_misc_proc_init(void);
#endif
#endif /* _IP_H */
projects / firefly-linux-kernel-4.4.55.git / blobdiff