11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * NET An implementation of the SOCKET network access protocol. 31da177e4SLinus Torvalds * This is the master header file for the Linux NET layer, 41da177e4SLinus Torvalds * or, in plain English: the networking handling part of the 51da177e4SLinus Torvalds * kernel. 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Version: @(#)net.h 1.0.3 05/25/93 81da177e4SLinus Torvalds * 91da177e4SLinus Torvalds * Authors: Orest Zborowski, <obz@Kodak.COM> 1002c30a84SJesper Juhl * Ross Biro 111da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 121da177e4SLinus Torvalds * 131da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 141da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 151da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 161da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 171da177e4SLinus Torvalds */ 181da177e4SLinus Torvalds #ifndef _LINUX_NET_H 191da177e4SLinus Torvalds #define _LINUX_NET_H 201da177e4SLinus Torvalds 210098b727SRusty Russell #include <linux/socket.h> 221da177e4SLinus Torvalds #include <asm/socket.h> 231da177e4SLinus Torvalds 240098b727SRusty Russell #define NPROTO AF_MAX 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds #define SYS_SOCKET 1 /* sys_socket(2) */ 271da177e4SLinus Torvalds #define SYS_BIND 2 /* sys_bind(2) */ 281da177e4SLinus Torvalds #define SYS_CONNECT 3 /* sys_connect(2) */ 291da177e4SLinus Torvalds #define SYS_LISTEN 4 /* sys_listen(2) */ 301da177e4SLinus Torvalds #define SYS_ACCEPT 5 /* sys_accept(2) */ 311da177e4SLinus Torvalds #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ 321da177e4SLinus Torvalds #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ 331da177e4SLinus Torvalds #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ 341da177e4SLinus Torvalds #define SYS_SEND 9 /* sys_send(2) */ 351da177e4SLinus Torvalds #define SYS_RECV 10 /* sys_recv(2) */ 361da177e4SLinus Torvalds #define SYS_SENDTO 11 /* sys_sendto(2) */ 371da177e4SLinus Torvalds #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ 381da177e4SLinus Torvalds #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ 391da177e4SLinus Torvalds #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ 401da177e4SLinus Torvalds #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ 411da177e4SLinus Torvalds #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ 421da177e4SLinus Torvalds #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ 43de11defeSUlrich Drepper #define SYS_ACCEPT4 18 /* sys_accept4(2) */ 44a2e27255SArnaldo Carvalho de Melo #define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */ 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds typedef enum { 471da177e4SLinus Torvalds SS_FREE = 0, /* not allocated */ 481da177e4SLinus Torvalds SS_UNCONNECTED, /* unconnected to any socket */ 491da177e4SLinus Torvalds SS_CONNECTING, /* in process of connecting */ 501da177e4SLinus Torvalds SS_CONNECTED, /* connected to socket */ 511da177e4SLinus Torvalds SS_DISCONNECTING /* in process of disconnecting */ 521da177e4SLinus Torvalds } socket_state; 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds #ifdef __KERNEL__ 57eacf17bdSDavid Woodhouse #include <linux/stringify.h> 58cb4db4c2SDavid Woodhouse #include <linux/random.h> 595770a3fbSDavid Woodhouse #include <linux/wait.h> 605770a3fbSDavid Woodhouse #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */ 6129a020d3SEric Dumazet #include <linux/kmemcheck.h> 625770a3fbSDavid Woodhouse 635770a3fbSDavid Woodhouse struct poll_table_struct; 645770a3fbSDavid Woodhouse struct pipe_inode_info; 655770a3fbSDavid Woodhouse struct inode; 665770a3fbSDavid Woodhouse struct net; 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds #define SOCK_ASYNC_NOSPACE 0 691da177e4SLinus Torvalds #define SOCK_ASYNC_WAITDATA 1 701da177e4SLinus Torvalds #define SOCK_NOSPACE 2 711da177e4SLinus Torvalds #define SOCK_PASSCRED 3 72877ce7c1SCatherine Zhang #define SOCK_PASSSEC 4 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds #ifndef ARCH_HAS_SOCKET_TYPES 754dc3b16bSPavel Pisa /** 764dc3b16bSPavel Pisa * enum sock_type - Socket types 774dc3b16bSPavel Pisa * @SOCK_STREAM: stream (connection) socket 784dc3b16bSPavel Pisa * @SOCK_DGRAM: datagram (conn.less) socket 794dc3b16bSPavel Pisa * @SOCK_RAW: raw socket 804dc3b16bSPavel Pisa * @SOCK_RDM: reliably-delivered message 814dc3b16bSPavel Pisa * @SOCK_SEQPACKET: sequential packet socket 828f2709b5SRandy Dunlap * @SOCK_DCCP: Datagram Congestion Control Protocol socket 834dc3b16bSPavel Pisa * @SOCK_PACKET: linux specific way of getting packets at the dev level. 844dc3b16bSPavel Pisa * For writing rarp and other similar things on the user level. 851da177e4SLinus Torvalds * 861da177e4SLinus Torvalds * When adding some new socket type please 871da177e4SLinus Torvalds * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS 881da177e4SLinus Torvalds * overrides this enum for binary compat reasons. 891da177e4SLinus Torvalds */ 901da177e4SLinus Torvalds enum sock_type { 911da177e4SLinus Torvalds SOCK_STREAM = 1, 921da177e4SLinus Torvalds SOCK_DGRAM = 2, 931da177e4SLinus Torvalds SOCK_RAW = 3, 941da177e4SLinus Torvalds SOCK_RDM = 4, 951da177e4SLinus Torvalds SOCK_SEQPACKET = 5, 967c657876SArnaldo Carvalho de Melo SOCK_DCCP = 6, 971da177e4SLinus Torvalds SOCK_PACKET = 10, 981da177e4SLinus Torvalds }; 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds #define SOCK_MAX (SOCK_PACKET + 1) 101a677a039SUlrich Drepper /* Mask which covers at least up to SOCK_MASK-1. The 102a677a039SUlrich Drepper * remaining bits are used as flags. */ 103a677a039SUlrich Drepper #define SOCK_TYPE_MASK 0xf 104a677a039SUlrich Drepper 105de11defeSUlrich Drepper /* Flags for socket, socketpair, accept4 */ 106a677a039SUlrich Drepper #define SOCK_CLOEXEC O_CLOEXEC 107c019bbc6SUlrich Drepper #ifndef SOCK_NONBLOCK 108c019bbc6SUlrich Drepper #define SOCK_NONBLOCK O_NONBLOCK 109c019bbc6SUlrich Drepper #endif 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds #endif /* ARCH_HAS_SOCKET_TYPES */ 1121da177e4SLinus Torvalds 11391cf45f0STrond Myklebust enum sock_shutdown_cmd { 11491cf45f0STrond Myklebust SHUT_RD = 0, 11591cf45f0STrond Myklebust SHUT_WR = 1, 11691cf45f0STrond Myklebust SHUT_RDWR = 2, 11791cf45f0STrond Myklebust }; 11891cf45f0STrond Myklebust 1191da177e4SLinus Torvalds /** 1201da177e4SLinus Torvalds * struct socket - general BSD socket 1214dc3b16bSPavel Pisa * @state: socket state (%SS_CONNECTED, etc) 1222c693610SRichard Kennedy * @type: socket type (%SOCK_STREAM, etc) 1234dc3b16bSPavel Pisa * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) 1244dc3b16bSPavel Pisa * @ops: protocol specific socket operations 1254dc3b16bSPavel Pisa * @fasync_list: Asynchronous wake up list 1264dc3b16bSPavel Pisa * @file: File back pointer for gc 1274dc3b16bSPavel Pisa * @sk: internal networking protocol agnostic socket representation 1284dc3b16bSPavel Pisa * @wait: wait queue for several uses 1291da177e4SLinus Torvalds */ 1301da177e4SLinus Torvalds struct socket { 1311da177e4SLinus Torvalds socket_state state; 13229a020d3SEric Dumazet 13329a020d3SEric Dumazet kmemcheck_bitfield_begin(type); 1342c693610SRichard Kennedy short type; 13529a020d3SEric Dumazet kmemcheck_bitfield_end(type); 13629a020d3SEric Dumazet 1371da177e4SLinus Torvalds unsigned long flags; 1388bdd663aSEric Dumazet /* 1398bdd663aSEric Dumazet * Please keep fasync_list & wait fields in the same cache line 1408bdd663aSEric Dumazet */ 1411da177e4SLinus Torvalds struct fasync_struct *fasync_list; 1428bdd663aSEric Dumazet wait_queue_head_t wait; 1438bdd663aSEric Dumazet 1441da177e4SLinus Torvalds struct file *file; 1451da177e4SLinus Torvalds struct sock *sk; 1468bdd663aSEric Dumazet const struct proto_ops *ops; 1471da177e4SLinus Torvalds }; 1481da177e4SLinus Torvalds 1491da177e4SLinus Torvalds struct vm_area_struct; 1501da177e4SLinus Torvalds struct page; 1511da177e4SLinus Torvalds struct kiocb; 1521da177e4SLinus Torvalds struct sockaddr; 1531da177e4SLinus Torvalds struct msghdr; 1541da177e4SLinus Torvalds struct module; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds struct proto_ops { 1571da177e4SLinus Torvalds int family; 1581da177e4SLinus Torvalds struct module *owner; 1591da177e4SLinus Torvalds int (*release) (struct socket *sock); 1601da177e4SLinus Torvalds int (*bind) (struct socket *sock, 1611da177e4SLinus Torvalds struct sockaddr *myaddr, 1621da177e4SLinus Torvalds int sockaddr_len); 1631da177e4SLinus Torvalds int (*connect) (struct socket *sock, 1641da177e4SLinus Torvalds struct sockaddr *vaddr, 1651da177e4SLinus Torvalds int sockaddr_len, int flags); 1661da177e4SLinus Torvalds int (*socketpair)(struct socket *sock1, 1671da177e4SLinus Torvalds struct socket *sock2); 1681da177e4SLinus Torvalds int (*accept) (struct socket *sock, 1691da177e4SLinus Torvalds struct socket *newsock, int flags); 1701da177e4SLinus Torvalds int (*getname) (struct socket *sock, 1711da177e4SLinus Torvalds struct sockaddr *addr, 1721da177e4SLinus Torvalds int *sockaddr_len, int peer); 1731da177e4SLinus Torvalds unsigned int (*poll) (struct file *file, struct socket *sock, 1741da177e4SLinus Torvalds struct poll_table_struct *wait); 1751da177e4SLinus Torvalds int (*ioctl) (struct socket *sock, unsigned int cmd, 1761da177e4SLinus Torvalds unsigned long arg); 177*1621e094SAlexey Dobriyan #ifdef CONFIG_COMPAT 17889bbfc95SShaun Pereira int (*compat_ioctl) (struct socket *sock, unsigned int cmd, 17989bbfc95SShaun Pereira unsigned long arg); 180*1621e094SAlexey Dobriyan #endif 1811da177e4SLinus Torvalds int (*listen) (struct socket *sock, int len); 1821da177e4SLinus Torvalds int (*shutdown) (struct socket *sock, int flags); 1831da177e4SLinus Torvalds int (*setsockopt)(struct socket *sock, int level, 184b7058842SDavid S. Miller int optname, char __user *optval, unsigned int optlen); 1851da177e4SLinus Torvalds int (*getsockopt)(struct socket *sock, int level, 1861da177e4SLinus Torvalds int optname, char __user *optval, int __user *optlen); 187*1621e094SAlexey Dobriyan #ifdef CONFIG_COMPAT 1883fdadf7dSDmitry Mishin int (*compat_setsockopt)(struct socket *sock, int level, 189b7058842SDavid S. Miller int optname, char __user *optval, unsigned int optlen); 1903fdadf7dSDmitry Mishin int (*compat_getsockopt)(struct socket *sock, int level, 1913fdadf7dSDmitry Mishin int optname, char __user *optval, int __user *optlen); 192*1621e094SAlexey Dobriyan #endif 1931da177e4SLinus Torvalds int (*sendmsg) (struct kiocb *iocb, struct socket *sock, 1941da177e4SLinus Torvalds struct msghdr *m, size_t total_len); 1951da177e4SLinus Torvalds int (*recvmsg) (struct kiocb *iocb, struct socket *sock, 1961da177e4SLinus Torvalds struct msghdr *m, size_t total_len, 1971da177e4SLinus Torvalds int flags); 1981da177e4SLinus Torvalds int (*mmap) (struct file *file, struct socket *sock, 1991da177e4SLinus Torvalds struct vm_area_struct * vma); 2001da177e4SLinus Torvalds ssize_t (*sendpage) (struct socket *sock, struct page *page, 2011da177e4SLinus Torvalds int offset, size_t size, int flags); 2029c55e01cSJens Axboe ssize_t (*splice_read)(struct socket *sock, loff_t *ppos, 2039c55e01cSJens Axboe struct pipe_inode_info *pipe, size_t len, unsigned int flags); 2041da177e4SLinus Torvalds }; 2051da177e4SLinus Torvalds 20638bfd8f5SCyrill Gorcunov #define DECLARE_SOCKADDR(type, dst, src) \ 20738bfd8f5SCyrill Gorcunov type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; }) 20838bfd8f5SCyrill Gorcunov 2091da177e4SLinus Torvalds struct net_proto_family { 2101da177e4SLinus Torvalds int family; 2113f378b68SEric Paris int (*create)(struct net *net, struct socket *sock, 2123f378b68SEric Paris int protocol, int kern); 2131da177e4SLinus Torvalds struct module *owner; 2141da177e4SLinus Torvalds }; 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds struct iovec; 2171da177e4SLinus Torvalds struct kvec; 2181da177e4SLinus Torvalds 2198d8ad9d7SPavel Emelyanov enum { 2208d8ad9d7SPavel Emelyanov SOCK_WAKE_IO, 2218d8ad9d7SPavel Emelyanov SOCK_WAKE_WAITD, 2228d8ad9d7SPavel Emelyanov SOCK_WAKE_SPACE, 2238d8ad9d7SPavel Emelyanov SOCK_WAKE_URG, 2248d8ad9d7SPavel Emelyanov }; 2258d8ad9d7SPavel Emelyanov 2261da177e4SLinus Torvalds extern int sock_wake_async(struct socket *sk, int how, int band); 227f0fd27d4SStephen Hemminger extern int sock_register(const struct net_proto_family *fam); 228f0fd27d4SStephen Hemminger extern void sock_unregister(int family); 2291da177e4SLinus Torvalds extern int sock_create(int family, int type, int proto, 2301da177e4SLinus Torvalds struct socket **res); 2311da177e4SLinus Torvalds extern int sock_create_kern(int family, int type, int proto, 2321da177e4SLinus Torvalds struct socket **res); 2331da177e4SLinus Torvalds extern int sock_create_lite(int family, int type, int proto, 2341da177e4SLinus Torvalds struct socket **res); 2351da177e4SLinus Torvalds extern void sock_release(struct socket *sock); 2361da177e4SLinus Torvalds extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, 2371da177e4SLinus Torvalds size_t len); 2381da177e4SLinus Torvalds extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, 2391da177e4SLinus Torvalds size_t size, int flags); 240a677a039SUlrich Drepper extern int sock_map_fd(struct socket *sock, int flags); 2411da177e4SLinus Torvalds extern struct socket *sockfd_lookup(int fd, int *err); 2421da177e4SLinus Torvalds #define sockfd_put(sock) fput(sock->file) 2431da177e4SLinus Torvalds extern int net_ratelimit(void); 244aaa248f6SStephen Hemminger 245aaa248f6SStephen Hemminger #define net_random() random32() 246a64b78a0SAl Viro #define net_srandom(seed) srandom32((__force u32)seed) 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, 2491da177e4SLinus Torvalds struct kvec *vec, size_t num, size_t len); 2501da177e4SLinus Torvalds extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, 2511da177e4SLinus Torvalds struct kvec *vec, size_t num, 2521da177e4SLinus Torvalds size_t len, int flags); 2531da177e4SLinus Torvalds 254ac5a488eSSridhar Samudrala extern int kernel_bind(struct socket *sock, struct sockaddr *addr, 255ac5a488eSSridhar Samudrala int addrlen); 256ac5a488eSSridhar Samudrala extern int kernel_listen(struct socket *sock, int backlog); 257ac5a488eSSridhar Samudrala extern int kernel_accept(struct socket *sock, struct socket **newsock, 258ac5a488eSSridhar Samudrala int flags); 259ac5a488eSSridhar Samudrala extern int kernel_connect(struct socket *sock, struct sockaddr *addr, 260ac5a488eSSridhar Samudrala int addrlen, int flags); 261ac5a488eSSridhar Samudrala extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, 262ac5a488eSSridhar Samudrala int *addrlen); 263ac5a488eSSridhar Samudrala extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, 264ac5a488eSSridhar Samudrala int *addrlen); 265ac5a488eSSridhar Samudrala extern int kernel_getsockopt(struct socket *sock, int level, int optname, 266ac5a488eSSridhar Samudrala char *optval, int *optlen); 267ac5a488eSSridhar Samudrala extern int kernel_setsockopt(struct socket *sock, int level, int optname, 268b7058842SDavid S. Miller char *optval, unsigned int optlen); 269ac5a488eSSridhar Samudrala extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, 270ac5a488eSSridhar Samudrala size_t size, int flags); 271ac5a488eSSridhar Samudrala extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); 27291cf45f0STrond Myklebust extern int kernel_sock_shutdown(struct socket *sock, 27391cf45f0STrond Myklebust enum sock_shutdown_cmd how); 274ac5a488eSSridhar Samudrala 2751da177e4SLinus Torvalds #define MODULE_ALIAS_NETPROTO(proto) \ 2761da177e4SLinus Torvalds MODULE_ALIAS("net-pf-" __stringify(proto)) 2771da177e4SLinus Torvalds 2784fdb3bb7SHarald Welte #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 2794fdb3bb7SHarald Welte MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 2804fdb3bb7SHarald Welte 281305e1e96SJean Delvare #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ 282305e1e96SJean Delvare MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ 283305e1e96SJean Delvare "-type-" __stringify(type)) 284305e1e96SJean Delvare 28520380731SArnaldo Carvalho de Melo #ifdef CONFIG_SYSCTL 28620380731SArnaldo Carvalho de Melo #include <linux/sysctl.h> 2873fff4c42SIngo Molnar #include <linux/ratelimit.h> 288717115e1SDave Young extern struct ratelimit_state net_ratelimit_state; 28920380731SArnaldo Carvalho de Melo #endif 29020380731SArnaldo Carvalho de Melo 2911da177e4SLinus Torvalds #endif /* __KERNEL__ */ 2921da177e4SLinus Torvalds #endif /* _LINUX_NET_H */ 293