LCOV - code coverage report
Current view: top level - include/linux - udp.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 1 0.0 %
Date: 2014-02-18 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * INET         An implementation of the TCP/IP protocol suite for the LINUX
       3                 :            :  *              operating system.  INET is implemented using the  BSD Socket
       4                 :            :  *              interface as the means of communication with the user level.
       5                 :            :  *
       6                 :            :  *              Definitions for the UDP protocol.
       7                 :            :  *
       8                 :            :  * Version:     @(#)udp.h       1.0.2   04/28/93
       9                 :            :  *
      10                 :            :  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
      11                 :            :  *
      12                 :            :  *              This program is free software; you can redistribute it and/or
      13                 :            :  *              modify it under the terms of the GNU General Public License
      14                 :            :  *              as published by the Free Software Foundation; either version
      15                 :            :  *              2 of the License, or (at your option) any later version.
      16                 :            :  */
      17                 :            : #ifndef _LINUX_UDP_H
      18                 :            : #define _LINUX_UDP_H
      19                 :            : 
      20                 :            : #include <net/inet_sock.h>
      21                 :            : #include <linux/skbuff.h>
      22                 :            : #include <net/netns/hash.h>
      23                 :            : #include <uapi/linux/udp.h>
      24                 :            : 
      25                 :          0 : static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
      26                 :            : {
      27                 :            :         return (struct udphdr *)skb_transport_header(skb);
      28                 :            : }
      29                 :            : 
      30                 :            : static inline struct udphdr *inner_udp_hdr(const struct sk_buff *skb)
      31                 :            : {
      32                 :            :         return (struct udphdr *)skb_inner_transport_header(skb);
      33                 :            : }
      34                 :            : 
      35                 :            : #define UDP_HTABLE_SIZE_MIN             (CONFIG_BASE_SMALL ? 128 : 256)
      36                 :            : 
      37                 :            : static inline int udp_hashfn(struct net *net, unsigned num, unsigned mask)
      38                 :            : {
      39                 :            :         return (num + net_hash_mix(net)) & mask;
      40                 :            : }
      41                 :            : 
      42                 :            : struct udp_sock {
      43                 :            :         /* inet_sock has to be the first member */
      44                 :            :         struct inet_sock inet;
      45                 :            : #define udp_port_hash           inet.sk.__sk_common.skc_u16hashes[0]
      46                 :            : #define udp_portaddr_hash       inet.sk.__sk_common.skc_u16hashes[1]
      47                 :            : #define udp_portaddr_node       inet.sk.__sk_common.skc_portaddr_node
      48                 :            :         int              pending;       /* Any pending frames ? */
      49                 :            :         unsigned int     corkflag;      /* Cork is required */
      50                 :            :         __u16            encap_type;    /* Is this an Encapsulation socket? */
      51                 :            :         /*
      52                 :            :          * Following member retains the information to create a UDP header
      53                 :            :          * when the socket is uncorked.
      54                 :            :          */
      55                 :            :         __u16            len;           /* total length of pending frames */
      56                 :            :         /*
      57                 :            :          * Fields specific to UDP-Lite.
      58                 :            :          */
      59                 :            :         __u16            pcslen;
      60                 :            :         __u16            pcrlen;
      61                 :            : /* indicator bits used by pcflag: */
      62                 :            : #define UDPLITE_BIT      0x1            /* set by udplite proto init function */
      63                 :            : #define UDPLITE_SEND_CC  0x2            /* set via udplite setsockopt         */
      64                 :            : #define UDPLITE_RECV_CC  0x4            /* set via udplite setsocktopt        */
      65                 :            :         __u8             pcflag;        /* marks socket as UDP-Lite if > 0    */
      66                 :            :         __u8             unused[3];
      67                 :            :         /*
      68                 :            :          * For encapsulation sockets.
      69                 :            :          */
      70                 :            :         int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
      71                 :            :         void (*encap_destroy)(struct sock *sk);
      72                 :            : };
      73                 :            : 
      74                 :            : static inline struct udp_sock *udp_sk(const struct sock *sk)
      75                 :            : {
      76                 :            :         return (struct udp_sock *)sk;
      77                 :            : }
      78                 :            : 
      79                 :            : #define udp_portaddr_for_each_entry(__sk, node, list) \
      80                 :            :         hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node)
      81                 :            : 
      82                 :            : #define udp_portaddr_for_each_entry_rcu(__sk, node, list) \
      83                 :            :         hlist_nulls_for_each_entry_rcu(__sk, node, list, __sk_common.skc_portaddr_node)
      84                 :            : 
      85                 :            : #define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
      86                 :            : 
      87                 :            : #endif  /* _LINUX_UDP_H */

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