diff options
Diffstat (limited to 'kernel/include/linux/udp.h')
| -rw-r--r-- | kernel/include/linux/udp.h | 109 |
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 */ |