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Diffstat (limited to 'include/linux/net.h')
| -rw-r--r-- | include/linux/net.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/include/linux/net.h b/include/linux/net.h new file mode 100644 index 000000000000..7823b3482506 --- /dev/null +++ b/include/linux/net.h @@ -0,0 +1,287 @@ +/* + * NET An implementation of the SOCKET network access protocol. + * This is the master header file for the Linux NET layer, + * or, in plain English: the networking handling part of the + * kernel. + * + * Version: @(#)net.h 1.0.3 05/25/93 + * + * Authors: Orest Zborowski, <obz@Kodak.COM> + * Ross Biro, <bir7@leland.Stanford.Edu> + * 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_NET_H +#define _LINUX_NET_H + +#include <linux/config.h> +#include <linux/wait.h> +#include <linux/stringify.h> +#include <asm/socket.h> + +struct poll_table_struct; +struct inode; + +#define NPROTO 32 /* should be enough for now.. */ + +#define SYS_SOCKET 1 /* sys_socket(2) */ +#define SYS_BIND 2 /* sys_bind(2) */ +#define SYS_CONNECT 3 /* sys_connect(2) */ +#define SYS_LISTEN 4 /* sys_listen(2) */ +#define SYS_ACCEPT 5 /* sys_accept(2) */ +#define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ +#define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ +#define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ +#define SYS_SEND 9 /* sys_send(2) */ +#define SYS_RECV 10 /* sys_recv(2) */ +#define SYS_SENDTO 11 /* sys_sendto(2) */ +#define SYS_RECVFROM 12 /* sys_recvfrom(2) */ +#define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ +#define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ +#define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ +#define SYS_SENDMSG 16 /* sys_sendmsg(2) */ +#define SYS_RECVMSG 17 /* sys_recvmsg(2) */ + +typedef enum { + SS_FREE = 0, /* not allocated */ + SS_UNCONNECTED, /* unconnected to any socket */ + SS_CONNECTING, /* in process of connecting */ + SS_CONNECTED, /* connected to socket */ + SS_DISCONNECTING /* in process of disconnecting */ +} socket_state; + +#define __SO_ACCEPTCON (1 << 16) /* performed a listen */ + +#ifdef __KERNEL__ + +#define SOCK_ASYNC_NOSPACE 0 +#define SOCK_ASYNC_WAITDATA 1 +#define SOCK_NOSPACE 2 +#define SOCK_PASSCRED 3 + +#ifndef ARCH_HAS_SOCKET_TYPES +/** sock_type - Socket types + * + * When adding some new socket type please + * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS + * overrides this enum for binary compat reasons. + * + * @SOCK_STREAM - stream (connection) socket + * @SOCK_DGRAM - datagram (conn.less) socket + * @SOCK_RAW - raw socket + * @SOCK_RDM - reliably-delivered message + * @SOCK_SEQPACKET - sequential packet socket + * @SOCK_PACKET - linux specific way of getting packets at the dev level. + * For writing rarp and other similar things on the user level. + */ +enum sock_type { + SOCK_STREAM = 1, + SOCK_DGRAM = 2, + SOCK_RAW = 3, + SOCK_RDM = 4, + SOCK_SEQPACKET = 5, + SOCK_PACKET = 10, +}; + +#define SOCK_MAX (SOCK_PACKET + 1) + +#endif /* ARCH_HAS_SOCKET_TYPES */ + +/** + * struct socket - general BSD socket + * @state - socket state (%SS_CONNECTED, etc) + * @flags - socket flags (%SOCK_ASYNC_NOSPACE, etc) + * @ops - protocol specific socket operations + * @fasync_list - Asynchronous wake up list + * @file - File back pointer for gc + * @sk - internal networking protocol agnostic socket representation + * @wait - wait queue for several uses + * @type - socket type (%SOCK_STREAM, etc) + * @passcred - credentials (used only in Unix Sockets (aka PF_LOCAL)) + */ +struct socket { + socket_state state; + unsigned long flags; + struct proto_ops *ops; + struct fasync_struct *fasync_list; + struct file *file; + struct sock *sk; + wait_queue_head_t wait; + short type; +}; + +struct vm_area_struct; +struct page; +struct kiocb; +struct sockaddr; +struct msghdr; +struct module; + +struct proto_ops { + int family; + struct module *owner; + int (*release) (struct socket *sock); + int (*bind) (struct socket *sock, + struct sockaddr *myaddr, + int sockaddr_len); + int (*connect) (struct socket *sock, + struct sockaddr *vaddr, + int sockaddr_len, int flags); + int (*socketpair)(struct socket *sock1, + struct socket *sock2); + int (*accept) (struct socket *sock, + struct socket *newsock, int flags); + int (*getname) (struct socket *sock, + struct sockaddr *addr, + int *sockaddr_len, int peer); + unsigned int (*poll) (struct file *file, struct socket *sock, + struct poll_table_struct *wait); + int (*ioctl) (struct socket *sock, unsigned int cmd, + unsigned long arg); + int (*listen) (struct socket *sock, int len); + int (*shutdown) (struct socket *sock, int flags); + int (*setsockopt)(struct socket *sock, int level, + int optname, char __user *optval, int optlen); + int (*getsockopt)(struct socket *sock, int level, + int optname, char __user *optval, int __user *optlen); + int (*sendmsg) (struct kiocb *iocb, struct socket *sock, + struct msghdr *m, size_t total_len); + int (*recvmsg) (struct kiocb *iocb, struct socket *sock, + struct msghdr *m, size_t total_len, + int flags); + int (*mmap) (struct file *file, struct socket *sock, + struct vm_area_struct * vma); + ssize_t (*sendpage) (struct socket *sock, struct page *page, + int offset, size_t size, int flags); +}; + +struct net_proto_family { + int family; + int (*create)(struct socket *sock, int protocol); + /* These are counters for the number of different methods of + each we support */ + short authentication; + short encryption; + short encrypt_net; + struct module *owner; +}; + +struct iovec; +struct kvec; + +extern int sock_wake_async(struct socket *sk, int how, int band); +extern int sock_register(struct net_proto_family *fam); +extern int sock_unregister(int family); +extern int sock_create(int family, int type, int proto, + struct socket **res); +extern int sock_create_kern(int family, int type, int proto, + struct socket **res); +extern int sock_create_lite(int family, int type, int proto, + struct socket **res); +extern void sock_release(struct socket *sock); +extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, + size_t len); +extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, + size_t size, int flags); +extern int sock_map_fd(struct socket *sock); +extern struct socket *sockfd_lookup(int fd, int *err); +#define sockfd_put(sock) fput(sock->file) +extern int net_ratelimit(void); +extern unsigned long net_random(void); +extern void net_srandom(unsigned long); +extern void net_random_init(void); + +extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, + struct kvec *vec, size_t num, size_t len); +extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, + struct kvec *vec, size_t num, + size_t len, int flags); + +#ifndef CONFIG_SMP +#define SOCKOPS_WRAPPED(name) name +#define SOCKOPS_WRAP(name, fam) +#else + +#define SOCKOPS_WRAPPED(name) __unlocked_##name + +#define SOCKCALL_WRAP(name, call, parms, args) \ +static int __lock_##name##_##call parms \ +{ \ + int ret; \ + lock_kernel(); \ + ret = __unlocked_##name##_ops.call args ;\ + unlock_kernel(); \ + return ret; \ +} + +#define SOCKCALL_UWRAP(name, call, parms, args) \ +static unsigned int __lock_##name##_##call parms \ +{ \ + int ret; \ + lock_kernel(); \ + ret = __unlocked_##name##_ops.call args ;\ + unlock_kernel(); \ + return ret; \ +} + + +#define SOCKOPS_WRAP(name, fam) \ +SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ +SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ + (sock, uaddr, addr_len)) \ +SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ + int addr_len, int flags), \ + (sock, uaddr, addr_len, flags)) \ +SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ + (sock1, sock2)) \ +SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ + int flags), (sock, newsock, flags)) \ +SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ + int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ +SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ + (file, sock, wait)) \ +SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ + unsigned long arg), (sock, cmd, arg)) \ +SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ +SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ +SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ + char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ +SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ + char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ +SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ + (iocb, sock, m, len)) \ +SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ + (iocb, sock, m, len, flags)) \ +SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ + (file, sock, vma)) \ + \ +static struct proto_ops name##_ops = { \ + .family = fam, \ + .owner = THIS_MODULE, \ + .release = __lock_##name##_release, \ + .bind = __lock_##name##_bind, \ + .connect = __lock_##name##_connect, \ + .socketpair = __lock_##name##_socketpair, \ + .accept = __lock_##name##_accept, \ + .getname = __lock_##name##_getname, \ + .poll = __lock_##name##_poll, \ + .ioctl = __lock_##name##_ioctl, \ + .listen = __lock_##name##_listen, \ + .shutdown = __lock_##name##_shutdown, \ + .setsockopt = __lock_##name##_setsockopt, \ + .getsockopt = __lock_##name##_getsockopt, \ + .sendmsg = __lock_##name##_sendmsg, \ + .recvmsg = __lock_##name##_recvmsg, \ + .mmap = __lock_##name##_mmap, \ +}; +#endif + +#define MODULE_ALIAS_NETPROTO(proto) \ + MODULE_ALIAS("net-pf-" __stringify(proto)) + +#endif /* __KERNEL__ */ +#endif /* _LINUX_NET_H */ |