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-rw-r--r--kernel/include/linux/udp.h109
1 files changed, 109 insertions, 0 deletions
diff --git a/kernel/include/linux/udp.h b/kernel/include/linux/udp.h
new file mode 100644
index 000000000..87c094961
--- /dev/null
+++ b/kernel/include/linux/udp.h
@@ -0,0 +1,109 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Definitions for the UDP protocol.
+ *
+ * Version: @(#)udp.h 1.0.2 04/28/93
+ *
+ * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#ifndef _LINUX_UDP_H
+#define _LINUX_UDP_H
+
+#include <net/inet_sock.h>
+#include <linux/skbuff.h>
+#include <net/netns/hash.h>
+#include <uapi/linux/udp.h>
+
+static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
+{
+ return (struct udphdr *)skb_transport_header(skb);
+}
+
+static inline struct udphdr *inner_udp_hdr(const struct sk_buff *skb)
+{
+ return (struct udphdr *)skb_inner_transport_header(skb);
+}
+
+#define UDP_HTABLE_SIZE_MIN (CONFIG_BASE_SMALL ? 128 : 256)
+
+static inline u32 udp_hashfn(const struct net *net, u32 num, u32 mask)
+{
+ return (num + net_hash_mix(net)) & mask;
+}
+
+struct udp_sock {
+ /* inet_sock has to be the first member */
+ struct inet_sock inet;
+#define udp_port_hash inet.sk.__sk_common.skc_u16hashes[0]
+#define udp_portaddr_hash inet.sk.__sk_common.skc_u16hashes[1]
+#define udp_portaddr_node inet.sk.__sk_common.skc_portaddr_node
+ int pending; /* Any pending frames ? */
+ unsigned int corkflag; /* Cork is required */
+ __u8 encap_type; /* Is this an Encapsulation socket? */
+ unsigned char no_check6_tx:1,/* Send zero UDP6 checksums on TX? */
+ no_check6_rx:1;/* Allow zero UDP6 checksums on RX? */
+ /*
+ * Following member retains the information to create a UDP header
+ * when the socket is uncorked.
+ */
+ __u16 len; /* total length of pending frames */
+ /*
+ * Fields specific to UDP-Lite.
+ */
+ __u16 pcslen;
+ __u16 pcrlen;
+/* indicator bits used by pcflag: */
+#define UDPLITE_BIT 0x1 /* set by udplite proto init function */
+#define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */
+#define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */
+ __u8 pcflag; /* marks socket as UDP-Lite if > 0 */
+ __u8 unused[3];
+ /*
+ * For encapsulation sockets.
+ */
+ int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
+ void (*encap_destroy)(struct sock *sk);
+};
+
+static inline struct udp_sock *udp_sk(const struct sock *sk)
+{
+ return (struct udp_sock *)sk;
+}
+
+static inline void udp_set_no_check6_tx(struct sock *sk, bool val)
+{
+ udp_sk(sk)->no_check6_tx = val;
+}
+
+static inline void udp_set_no_check6_rx(struct sock *sk, bool val)
+{
+ udp_sk(sk)->no_check6_rx = val;
+}
+
+static inline bool udp_get_no_check6_tx(struct sock *sk)
+{
+ return udp_sk(sk)->no_check6_tx;
+}
+
+static inline bool udp_get_no_check6_rx(struct sock *sk)
+{
+ return udp_sk(sk)->no_check6_rx;
+}
+
+#define udp_portaddr_for_each_entry(__sk, node, list) \
+ hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node)
+
+#define udp_portaddr_for_each_entry_rcu(__sk, node, list) \
+ hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node)
+
+#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
+
+#endif /* _LINUX_UDP_H */