LCOV - code coverage report
Current view: top level - include/linux - net.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 3 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : /*
       2             :  * NET          An implementation of the SOCKET network access protocol.
       3             :  *              This is the master header file for the Linux NET layer,
       4             :  *              or, in plain English: the networking handling part of the
       5             :  *              kernel.
       6             :  *
       7             :  * Version:     @(#)net.h       1.0.3   05/25/93
       8             :  *
       9             :  * Authors:     Orest Zborowski, <obz@Kodak.COM>
      10             :  *              Ross Biro
      11             :  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
      12             :  *
      13             :  *              This program is free software; you can redistribute it and/or
      14             :  *              modify it under the terms of the GNU General Public License
      15             :  *              as published by the Free Software Foundation; either version
      16             :  *              2 of the License, or (at your option) any later version.
      17             :  */
      18             : #ifndef _LINUX_NET_H
      19             : #define _LINUX_NET_H
      20             : 
      21             : #include <linux/socket.h>
      22             : #include <asm/socket.h>
      23             : 
      24             : #define NPROTO          AF_MAX
      25             : 
      26             : #define SYS_SOCKET      1               /* sys_socket(2)                */
      27             : #define SYS_BIND        2               /* sys_bind(2)                  */
      28             : #define SYS_CONNECT     3               /* sys_connect(2)               */
      29             : #define SYS_LISTEN      4               /* sys_listen(2)                */
      30             : #define SYS_ACCEPT      5               /* sys_accept(2)                */
      31             : #define SYS_GETSOCKNAME 6               /* sys_getsockname(2)           */
      32             : #define SYS_GETPEERNAME 7               /* sys_getpeername(2)           */
      33             : #define SYS_SOCKETPAIR  8               /* sys_socketpair(2)            */
      34             : #define SYS_SEND        9               /* sys_send(2)                  */
      35             : #define SYS_RECV        10              /* sys_recv(2)                  */
      36             : #define SYS_SENDTO      11              /* sys_sendto(2)                */
      37             : #define SYS_RECVFROM    12              /* sys_recvfrom(2)              */
      38             : #define SYS_SHUTDOWN    13              /* sys_shutdown(2)              */
      39             : #define SYS_SETSOCKOPT  14              /* sys_setsockopt(2)            */
      40             : #define SYS_GETSOCKOPT  15              /* sys_getsockopt(2)            */
      41             : #define SYS_SENDMSG     16              /* sys_sendmsg(2)               */
      42             : #define SYS_RECVMSG     17              /* sys_recvmsg(2)               */
      43             : #define SYS_ACCEPT4     18              /* sys_accept4(2)               */
      44             : #define SYS_RECVMMSG    19              /* sys_recvmmsg(2)              */
      45             : 
      46             : typedef enum {
      47             :         SS_FREE = 0,                    /* not allocated                */
      48             :         SS_UNCONNECTED,                 /* unconnected to any socket    */
      49             :         SS_CONNECTING,                  /* in process of connecting     */
      50             :         SS_CONNECTED,                   /* connected to socket          */
      51             :         SS_DISCONNECTING                /* in process of disconnecting  */
      52           1 : } socket_state;
      53             : 
      54             : #define __SO_ACCEPTCON  (1 << 16) /* performed a listen           */
      55             : 
      56             : #ifdef __KERNEL__
      57             : #include <linux/stringify.h>
      58             : #include <linux/random.h>
      59             : #include <linux/wait.h>
      60             : #include <linux/fcntl.h>  /* For O_CLOEXEC and O_NONBLOCK */
      61             : #include <linux/kmemcheck.h>
      62             : 
      63             : struct poll_table_struct;
      64             : struct pipe_inode_info;
      65             : struct inode;
      66             : struct net;
      67             : 
      68             : #define SOCK_ASYNC_NOSPACE      0
      69             : #define SOCK_ASYNC_WAITDATA     1
      70             : #define SOCK_NOSPACE            2
      71             : #define SOCK_PASSCRED           3
      72             : #define SOCK_PASSSEC            4
      73             : 
      74             : #ifndef ARCH_HAS_SOCKET_TYPES
      75             : /**
      76             :  * enum sock_type - Socket types
      77             :  * @SOCK_STREAM: stream (connection) socket
      78             :  * @SOCK_DGRAM: datagram (conn.less) socket
      79             :  * @SOCK_RAW: raw socket
      80             :  * @SOCK_RDM: reliably-delivered message
      81             :  * @SOCK_SEQPACKET: sequential packet socket
      82             :  * @SOCK_DCCP: Datagram Congestion Control Protocol socket
      83             :  * @SOCK_PACKET: linux specific way of getting packets at the dev level.
      84             :  *                For writing rarp and other similar things on the user level.
      85             :  *
      86             :  * When adding some new socket type please
      87             :  * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
      88             :  * overrides this enum for binary compat reasons.
      89             :  */
      90             : enum sock_type {
      91             :         SOCK_STREAM     = 1,
      92             :         SOCK_DGRAM      = 2,
      93             :         SOCK_RAW        = 3,
      94             :         SOCK_RDM        = 4,
      95             :         SOCK_SEQPACKET  = 5,
      96             :         SOCK_DCCP       = 6,
      97             :         SOCK_PACKET     = 10,
      98             : };
      99             : 
     100             : #define SOCK_MAX (SOCK_PACKET + 1)
     101             : /* Mask which covers at least up to SOCK_MASK-1.  The
     102             :  * remaining bits are used as flags. */
     103             : #define SOCK_TYPE_MASK 0xf
     104             : 
     105             : /* Flags for socket, socketpair, accept4 */
     106             : #define SOCK_CLOEXEC    O_CLOEXEC
     107             : #ifndef SOCK_NONBLOCK
     108             : #define SOCK_NONBLOCK   O_NONBLOCK
     109             : #endif
     110             : 
     111             : #endif /* ARCH_HAS_SOCKET_TYPES */
     112             : 
     113             : enum sock_shutdown_cmd {
     114             :         SHUT_RD         = 0,
     115             :         SHUT_WR         = 1,
     116             :         SHUT_RDWR       = 2,
     117             : };
     118             : 
     119             : /**
     120             :  *  struct socket - general BSD socket
     121             :  *  @state: socket state (%SS_CONNECTED, etc)
     122             :  *  @type: socket type (%SOCK_STREAM, etc)
     123             :  *  @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
     124             :  *  @ops: protocol specific socket operations
     125             :  *  @fasync_list: Asynchronous wake up list
     126             :  *  @file: File back pointer for gc
     127             :  *  @sk: internal networking protocol agnostic socket representation
     128             :  *  @wait: wait queue for several uses
     129             :  */
     130             : struct socket {
     131             :         socket_state            state;
     132             : 
     133             :         kmemcheck_bitfield_begin(type);
     134             :         short                   type;
     135             :         kmemcheck_bitfield_end(type);
     136             : 
     137             :         unsigned long           flags;
     138             :         /*
     139             :          * Please keep fasync_list & wait fields in the same cache line
     140             :          */
     141             :         struct fasync_struct    *fasync_list;
     142             :         wait_queue_head_t       wait;
     143             : 
     144             :         struct file             *file;
     145             :         struct sock             *sk;
     146             :         const struct proto_ops  *ops;
     147             : };
     148           1 : 
     149           1 : struct vm_area_struct;
     150             : struct page;
     151             : struct kiocb;
     152             : struct sockaddr;
     153             : struct msghdr;
     154             : struct module;
     155             : 
     156             : struct proto_ops {
     157             :         int             family;
     158             :         struct module   *owner;
     159             :         int             (*release)   (struct socket *sock);
     160             :         int             (*bind)      (struct socket *sock,
     161             :                                       struct sockaddr *myaddr,
     162             :                                       int sockaddr_len);
     163             :         int             (*connect)   (struct socket *sock,
     164             :                                       struct sockaddr *vaddr,
     165             :                                       int sockaddr_len, int flags);
     166             :         int             (*socketpair)(struct socket *sock1,
     167             :                                       struct socket *sock2);
     168             :         int             (*accept)    (struct socket *sock,
     169             :                                       struct socket *newsock, int flags);
     170             :         int             (*getname)   (struct socket *sock,
     171             :                                       struct sockaddr *addr,
     172             :                                       int *sockaddr_len, int peer);
     173             :         unsigned int    (*poll)      (struct file *file, struct socket *sock,
     174             :                                       struct poll_table_struct *wait);
     175             :         int             (*ioctl)     (struct socket *sock, unsigned int cmd,
     176             :                                       unsigned long arg);
     177             :         int             (*compat_ioctl) (struct socket *sock, unsigned int cmd,
     178             :                                       unsigned long arg);
     179             :         int             (*listen)    (struct socket *sock, int len);
     180             :         int             (*shutdown)  (struct socket *sock, int flags);
     181             :         int             (*setsockopt)(struct socket *sock, int level,
     182             :                                       int optname, char __user *optval, unsigned int optlen);
     183             :         int             (*getsockopt)(struct socket *sock, int level,
     184             :                                       int optname, char __user *optval, int __user *optlen);
     185             :         int             (*compat_setsockopt)(struct socket *sock, int level,
     186             :                                       int optname, char __user *optval, unsigned int optlen);
     187             :         int             (*compat_getsockopt)(struct socket *sock, int level,
     188             :                                       int optname, char __user *optval, int __user *optlen);
     189             :         int             (*sendmsg)   (struct kiocb *iocb, struct socket *sock,
     190             :                                       struct msghdr *m, size_t total_len);
     191             :         int             (*recvmsg)   (struct kiocb *iocb, struct socket *sock,
     192             :                                       struct msghdr *m, size_t total_len,
     193             :                                       int flags);
     194             :         int             (*mmap)      (struct file *file, struct socket *sock,
     195             :                                       struct vm_area_struct * vma);
     196             :         ssize_t         (*sendpage)  (struct socket *sock, struct page *page,
     197             :                                       int offset, size_t size, int flags);
     198             :         ssize_t         (*splice_read)(struct socket *sock,  loff_t *ppos,
     199             :                                        struct pipe_inode_info *pipe, size_t len, unsigned int flags);
     200             : };
     201             : 
     202             : #define DECLARE_SOCKADDR(type, dst, src)        \
     203             :         type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })
     204             : 
     205             : struct net_proto_family {
     206             :         int             family;
     207             :         int             (*create)(struct net *net, struct socket *sock,
     208             :                                   int protocol, int kern);
     209             :         struct module   *owner;
     210             : };
     211             : 
     212             : struct iovec;
     213             : struct kvec;
     214             : 
     215             : enum {
     216             :         SOCK_WAKE_IO,
     217             :         SOCK_WAKE_WAITD,
     218             :         SOCK_WAKE_SPACE,
     219             :         SOCK_WAKE_URG,
     220             : };
     221             : 
     222             : extern int           sock_wake_async(struct socket *sk, int how, int band);
     223             : extern int           sock_register(const struct net_proto_family *fam);
     224             : extern void          sock_unregister(int family);
     225             : extern int           sock_create(int family, int type, int proto,
     226             :                                  struct socket **res);
     227             : extern int           sock_create_kern(int family, int type, int proto,
     228             :                                       struct socket **res);
     229             : extern int           sock_create_lite(int family, int type, int proto,
     230             :                                       struct socket **res); 
     231             : extern void          sock_release(struct socket *sock);
     232             : extern int           sock_sendmsg(struct socket *sock, struct msghdr *msg,
     233             :                                   size_t len);
     234             : extern int           sock_recvmsg(struct socket *sock, struct msghdr *msg,
     235             :                                   size_t size, int flags);
     236             : extern int           sock_map_fd(struct socket *sock, int flags);
     237             : extern struct socket *sockfd_lookup(int fd, int *err);
     238             : #define              sockfd_put(sock) fput(sock->file)
     239             : extern int           net_ratelimit(void);
     240             : 
     241             : #define net_random()            random32()
     242             : #define net_srandom(seed)       srandom32((__force u32)seed)
     243             : 
     244             : extern int           kernel_sendmsg(struct socket *sock, struct msghdr *msg,
     245             :                                     struct kvec *vec, size_t num, size_t len);
     246             : extern int           kernel_recvmsg(struct socket *sock, struct msghdr *msg,
     247             :                                     struct kvec *vec, size_t num,
     248             :                                     size_t len, int flags);
     249             : 
     250             : extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
     251             :                        int addrlen);
     252             : extern int kernel_listen(struct socket *sock, int backlog);
     253             : extern int kernel_accept(struct socket *sock, struct socket **newsock,
     254             :                          int flags);
     255             : extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
     256             :                           int addrlen, int flags);
     257             : extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
     258             :                               int *addrlen);
     259             : extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
     260             :                               int *addrlen);
     261             : extern int kernel_getsockopt(struct socket *sock, int level, int optname,
     262             :                              char *optval, int *optlen);
     263             : extern int kernel_setsockopt(struct socket *sock, int level, int optname,
     264             :                              char *optval, unsigned int optlen);
     265             : extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
     266             :                            size_t size, int flags);
     267             : extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
     268             : extern int kernel_sock_shutdown(struct socket *sock,
     269             :                                 enum sock_shutdown_cmd how);
     270             : 
     271             : #define MODULE_ALIAS_NETPROTO(proto) \
     272             :         MODULE_ALIAS("net-pf-" __stringify(proto))
     273             : 
     274             : #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
     275             :         MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
     276             : 
     277             : #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
     278             :         MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
     279             :                      "-type-" __stringify(type))
     280             : 
     281             : #ifdef CONFIG_SYSCTL
     282             : #include <linux/sysctl.h>
     283             : #include <linux/ratelimit.h>
     284             : extern struct ratelimit_state net_ratelimit_state;
     285             : #endif
     286             : 
     287             : #endif /* __KERNEL__ */
     288             : #endif  /* _LINUX_NET_H */

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