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 211da177e4SLinus Torvalds #include <linux/config.h> 221da177e4SLinus Torvalds #include <linux/wait.h> 231da177e4SLinus Torvalds #include <asm/socket.h> 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds struct poll_table_struct; 261da177e4SLinus Torvalds struct inode; 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds #define NPROTO 32 /* should be enough for now.. */ 291da177e4SLinus Torvalds 301da177e4SLinus Torvalds #define SYS_SOCKET 1 /* sys_socket(2) */ 311da177e4SLinus Torvalds #define SYS_BIND 2 /* sys_bind(2) */ 321da177e4SLinus Torvalds #define SYS_CONNECT 3 /* sys_connect(2) */ 331da177e4SLinus Torvalds #define SYS_LISTEN 4 /* sys_listen(2) */ 341da177e4SLinus Torvalds #define SYS_ACCEPT 5 /* sys_accept(2) */ 351da177e4SLinus Torvalds #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ 361da177e4SLinus Torvalds #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ 371da177e4SLinus Torvalds #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ 381da177e4SLinus Torvalds #define SYS_SEND 9 /* sys_send(2) */ 391da177e4SLinus Torvalds #define SYS_RECV 10 /* sys_recv(2) */ 401da177e4SLinus Torvalds #define SYS_SENDTO 11 /* sys_sendto(2) */ 411da177e4SLinus Torvalds #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ 421da177e4SLinus Torvalds #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ 431da177e4SLinus Torvalds #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ 441da177e4SLinus Torvalds #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ 451da177e4SLinus Torvalds #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ 461da177e4SLinus Torvalds #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds typedef enum { 491da177e4SLinus Torvalds SS_FREE = 0, /* not allocated */ 501da177e4SLinus Torvalds SS_UNCONNECTED, /* unconnected to any socket */ 511da177e4SLinus Torvalds SS_CONNECTING, /* in process of connecting */ 521da177e4SLinus Torvalds SS_CONNECTED, /* connected to socket */ 531da177e4SLinus Torvalds SS_DISCONNECTING /* in process of disconnecting */ 541da177e4SLinus Torvalds } socket_state; 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds #ifdef __KERNEL__ 59*eacf17bdSDavid Woodhouse #include <linux/stringify.h> 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds #define SOCK_ASYNC_NOSPACE 0 621da177e4SLinus Torvalds #define SOCK_ASYNC_WAITDATA 1 631da177e4SLinus Torvalds #define SOCK_NOSPACE 2 641da177e4SLinus Torvalds #define SOCK_PASSCRED 3 651da177e4SLinus Torvalds 661da177e4SLinus Torvalds #ifndef ARCH_HAS_SOCKET_TYPES 674dc3b16bSPavel Pisa /** 684dc3b16bSPavel Pisa * enum sock_type - Socket types 694dc3b16bSPavel Pisa * @SOCK_STREAM: stream (connection) socket 704dc3b16bSPavel Pisa * @SOCK_DGRAM: datagram (conn.less) socket 714dc3b16bSPavel Pisa * @SOCK_RAW: raw socket 724dc3b16bSPavel Pisa * @SOCK_RDM: reliably-delivered message 734dc3b16bSPavel Pisa * @SOCK_SEQPACKET: sequential packet socket 748f2709b5SRandy Dunlap * @SOCK_DCCP: Datagram Congestion Control Protocol socket 754dc3b16bSPavel Pisa * @SOCK_PACKET: linux specific way of getting packets at the dev level. 764dc3b16bSPavel Pisa * For writing rarp and other similar things on the user level. 771da177e4SLinus Torvalds * 781da177e4SLinus Torvalds * When adding some new socket type please 791da177e4SLinus Torvalds * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS 801da177e4SLinus Torvalds * overrides this enum for binary compat reasons. 811da177e4SLinus Torvalds */ 821da177e4SLinus Torvalds enum sock_type { 831da177e4SLinus Torvalds SOCK_STREAM = 1, 841da177e4SLinus Torvalds SOCK_DGRAM = 2, 851da177e4SLinus Torvalds SOCK_RAW = 3, 861da177e4SLinus Torvalds SOCK_RDM = 4, 871da177e4SLinus Torvalds SOCK_SEQPACKET = 5, 887c657876SArnaldo Carvalho de Melo SOCK_DCCP = 6, 891da177e4SLinus Torvalds SOCK_PACKET = 10, 901da177e4SLinus Torvalds }; 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds #define SOCK_MAX (SOCK_PACKET + 1) 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds #endif /* ARCH_HAS_SOCKET_TYPES */ 951da177e4SLinus Torvalds 961da177e4SLinus Torvalds /** 971da177e4SLinus Torvalds * struct socket - general BSD socket 984dc3b16bSPavel Pisa * @state: socket state (%SS_CONNECTED, etc) 994dc3b16bSPavel Pisa * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) 1004dc3b16bSPavel Pisa * @ops: protocol specific socket operations 1014dc3b16bSPavel Pisa * @fasync_list: Asynchronous wake up list 1024dc3b16bSPavel Pisa * @file: File back pointer for gc 1034dc3b16bSPavel Pisa * @sk: internal networking protocol agnostic socket representation 1044dc3b16bSPavel Pisa * @wait: wait queue for several uses 1054dc3b16bSPavel Pisa * @type: socket type (%SOCK_STREAM, etc) 1061da177e4SLinus Torvalds */ 1071da177e4SLinus Torvalds struct socket { 1081da177e4SLinus Torvalds socket_state state; 1091da177e4SLinus Torvalds unsigned long flags; 11090ddc4f0SEric Dumazet const struct proto_ops *ops; 1111da177e4SLinus Torvalds struct fasync_struct *fasync_list; 1121da177e4SLinus Torvalds struct file *file; 1131da177e4SLinus Torvalds struct sock *sk; 1141da177e4SLinus Torvalds wait_queue_head_t wait; 1151da177e4SLinus Torvalds short type; 1161da177e4SLinus Torvalds }; 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds struct vm_area_struct; 1191da177e4SLinus Torvalds struct page; 1201da177e4SLinus Torvalds struct kiocb; 1211da177e4SLinus Torvalds struct sockaddr; 1221da177e4SLinus Torvalds struct msghdr; 1231da177e4SLinus Torvalds struct module; 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds struct proto_ops { 1261da177e4SLinus Torvalds int family; 1271da177e4SLinus Torvalds struct module *owner; 1281da177e4SLinus Torvalds int (*release) (struct socket *sock); 1291da177e4SLinus Torvalds int (*bind) (struct socket *sock, 1301da177e4SLinus Torvalds struct sockaddr *myaddr, 1311da177e4SLinus Torvalds int sockaddr_len); 1321da177e4SLinus Torvalds int (*connect) (struct socket *sock, 1331da177e4SLinus Torvalds struct sockaddr *vaddr, 1341da177e4SLinus Torvalds int sockaddr_len, int flags); 1351da177e4SLinus Torvalds int (*socketpair)(struct socket *sock1, 1361da177e4SLinus Torvalds struct socket *sock2); 1371da177e4SLinus Torvalds int (*accept) (struct socket *sock, 1381da177e4SLinus Torvalds struct socket *newsock, int flags); 1391da177e4SLinus Torvalds int (*getname) (struct socket *sock, 1401da177e4SLinus Torvalds struct sockaddr *addr, 1411da177e4SLinus Torvalds int *sockaddr_len, int peer); 1421da177e4SLinus Torvalds unsigned int (*poll) (struct file *file, struct socket *sock, 1431da177e4SLinus Torvalds struct poll_table_struct *wait); 1441da177e4SLinus Torvalds int (*ioctl) (struct socket *sock, unsigned int cmd, 1451da177e4SLinus Torvalds unsigned long arg); 14689bbfc95SShaun Pereira int (*compat_ioctl) (struct socket *sock, unsigned int cmd, 14789bbfc95SShaun Pereira unsigned long arg); 1481da177e4SLinus Torvalds int (*listen) (struct socket *sock, int len); 1491da177e4SLinus Torvalds int (*shutdown) (struct socket *sock, int flags); 1501da177e4SLinus Torvalds int (*setsockopt)(struct socket *sock, int level, 1511da177e4SLinus Torvalds int optname, char __user *optval, int optlen); 1521da177e4SLinus Torvalds int (*getsockopt)(struct socket *sock, int level, 1531da177e4SLinus Torvalds int optname, char __user *optval, int __user *optlen); 1543fdadf7dSDmitry Mishin int (*compat_setsockopt)(struct socket *sock, int level, 1553fdadf7dSDmitry Mishin int optname, char __user *optval, int optlen); 1563fdadf7dSDmitry Mishin int (*compat_getsockopt)(struct socket *sock, int level, 1573fdadf7dSDmitry Mishin int optname, char __user *optval, int __user *optlen); 1581da177e4SLinus Torvalds int (*sendmsg) (struct kiocb *iocb, struct socket *sock, 1591da177e4SLinus Torvalds struct msghdr *m, size_t total_len); 1601da177e4SLinus Torvalds int (*recvmsg) (struct kiocb *iocb, struct socket *sock, 1611da177e4SLinus Torvalds struct msghdr *m, size_t total_len, 1621da177e4SLinus Torvalds int flags); 1631da177e4SLinus Torvalds int (*mmap) (struct file *file, struct socket *sock, 1641da177e4SLinus Torvalds struct vm_area_struct * vma); 1651da177e4SLinus Torvalds ssize_t (*sendpage) (struct socket *sock, struct page *page, 1661da177e4SLinus Torvalds int offset, size_t size, int flags); 1671da177e4SLinus Torvalds }; 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds struct net_proto_family { 1701da177e4SLinus Torvalds int family; 1711da177e4SLinus Torvalds int (*create)(struct socket *sock, int protocol); 1721da177e4SLinus Torvalds /* These are counters for the number of different methods of 1731da177e4SLinus Torvalds each we support */ 1741da177e4SLinus Torvalds short authentication; 1751da177e4SLinus Torvalds short encryption; 1761da177e4SLinus Torvalds short encrypt_net; 1771da177e4SLinus Torvalds struct module *owner; 1781da177e4SLinus Torvalds }; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds struct iovec; 1811da177e4SLinus Torvalds struct kvec; 1821da177e4SLinus Torvalds 1831da177e4SLinus Torvalds extern int sock_wake_async(struct socket *sk, int how, int band); 1841da177e4SLinus Torvalds extern int sock_register(struct net_proto_family *fam); 1851da177e4SLinus Torvalds extern int sock_unregister(int family); 1861da177e4SLinus Torvalds extern int sock_create(int family, int type, int proto, 1871da177e4SLinus Torvalds struct socket **res); 1881da177e4SLinus Torvalds extern int sock_create_kern(int family, int type, int proto, 1891da177e4SLinus Torvalds struct socket **res); 1901da177e4SLinus Torvalds extern int sock_create_lite(int family, int type, int proto, 1911da177e4SLinus Torvalds struct socket **res); 1921da177e4SLinus Torvalds extern void sock_release(struct socket *sock); 1931da177e4SLinus Torvalds extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, 1941da177e4SLinus Torvalds size_t len); 1951da177e4SLinus Torvalds extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, 1961da177e4SLinus Torvalds size_t size, int flags); 1971da177e4SLinus Torvalds extern int sock_map_fd(struct socket *sock); 1981da177e4SLinus Torvalds extern struct socket *sockfd_lookup(int fd, int *err); 1991da177e4SLinus Torvalds #define sockfd_put(sock) fput(sock->file) 2001da177e4SLinus Torvalds extern int net_ratelimit(void); 2011da177e4SLinus Torvalds extern unsigned long net_random(void); 2021da177e4SLinus Torvalds extern void net_srandom(unsigned long); 2031da177e4SLinus Torvalds extern void net_random_init(void); 2041da177e4SLinus Torvalds 2051da177e4SLinus Torvalds extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, 2061da177e4SLinus Torvalds struct kvec *vec, size_t num, size_t len); 2071da177e4SLinus Torvalds extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, 2081da177e4SLinus Torvalds struct kvec *vec, size_t num, 2091da177e4SLinus Torvalds size_t len, int flags); 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds #ifndef CONFIG_SMP 2121da177e4SLinus Torvalds #define SOCKOPS_WRAPPED(name) name 2131da177e4SLinus Torvalds #define SOCKOPS_WRAP(name, fam) 2141da177e4SLinus Torvalds #else 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds #define SOCKOPS_WRAPPED(name) __unlocked_##name 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds #define SOCKCALL_WRAP(name, call, parms, args) \ 2191da177e4SLinus Torvalds static int __lock_##name##_##call parms \ 2201da177e4SLinus Torvalds { \ 2211da177e4SLinus Torvalds int ret; \ 2221da177e4SLinus Torvalds lock_kernel(); \ 2231da177e4SLinus Torvalds ret = __unlocked_##name##_ops.call args ;\ 2241da177e4SLinus Torvalds unlock_kernel(); \ 2251da177e4SLinus Torvalds return ret; \ 2261da177e4SLinus Torvalds } 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds #define SOCKCALL_UWRAP(name, call, parms, args) \ 2291da177e4SLinus Torvalds static unsigned int __lock_##name##_##call parms \ 2301da177e4SLinus Torvalds { \ 2311da177e4SLinus Torvalds int ret; \ 2321da177e4SLinus Torvalds lock_kernel(); \ 2331da177e4SLinus Torvalds ret = __unlocked_##name##_ops.call args ;\ 2341da177e4SLinus Torvalds unlock_kernel(); \ 2351da177e4SLinus Torvalds return ret; \ 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds #define SOCKOPS_WRAP(name, fam) \ 2401da177e4SLinus Torvalds SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ 2411da177e4SLinus Torvalds SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ 2421da177e4SLinus Torvalds (sock, uaddr, addr_len)) \ 2431da177e4SLinus Torvalds SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ 2441da177e4SLinus Torvalds int addr_len, int flags), \ 2451da177e4SLinus Torvalds (sock, uaddr, addr_len, flags)) \ 2461da177e4SLinus Torvalds SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ 2471da177e4SLinus Torvalds (sock1, sock2)) \ 2481da177e4SLinus Torvalds SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ 2491da177e4SLinus Torvalds int flags), (sock, newsock, flags)) \ 2501da177e4SLinus Torvalds SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ 2511da177e4SLinus Torvalds int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ 2521da177e4SLinus Torvalds SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ 2531da177e4SLinus Torvalds (file, sock, wait)) \ 2541da177e4SLinus Torvalds SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ 2551da177e4SLinus Torvalds unsigned long arg), (sock, cmd, arg)) \ 25689bbfc95SShaun Pereira SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \ 25789bbfc95SShaun Pereira unsigned long arg), (sock, cmd, arg)) \ 2581da177e4SLinus Torvalds SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ 2591da177e4SLinus Torvalds SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ 2601da177e4SLinus Torvalds SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ 2611da177e4SLinus Torvalds char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ 2621da177e4SLinus Torvalds SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ 2631da177e4SLinus Torvalds char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ 2641da177e4SLinus Torvalds SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ 2651da177e4SLinus Torvalds (iocb, sock, m, len)) \ 2661da177e4SLinus Torvalds SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ 2671da177e4SLinus Torvalds (iocb, sock, m, len, flags)) \ 2681da177e4SLinus Torvalds SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ 2691da177e4SLinus Torvalds (file, sock, vma)) \ 2701da177e4SLinus Torvalds \ 27190ddc4f0SEric Dumazet static const struct proto_ops name##_ops = { \ 2721da177e4SLinus Torvalds .family = fam, \ 2731da177e4SLinus Torvalds .owner = THIS_MODULE, \ 2741da177e4SLinus Torvalds .release = __lock_##name##_release, \ 2751da177e4SLinus Torvalds .bind = __lock_##name##_bind, \ 2761da177e4SLinus Torvalds .connect = __lock_##name##_connect, \ 2771da177e4SLinus Torvalds .socketpair = __lock_##name##_socketpair, \ 2781da177e4SLinus Torvalds .accept = __lock_##name##_accept, \ 2791da177e4SLinus Torvalds .getname = __lock_##name##_getname, \ 2801da177e4SLinus Torvalds .poll = __lock_##name##_poll, \ 2811da177e4SLinus Torvalds .ioctl = __lock_##name##_ioctl, \ 28289bbfc95SShaun Pereira .compat_ioctl = __lock_##name##_compat_ioctl, \ 2831da177e4SLinus Torvalds .listen = __lock_##name##_listen, \ 2841da177e4SLinus Torvalds .shutdown = __lock_##name##_shutdown, \ 2851da177e4SLinus Torvalds .setsockopt = __lock_##name##_setsockopt, \ 2861da177e4SLinus Torvalds .getsockopt = __lock_##name##_getsockopt, \ 2871da177e4SLinus Torvalds .sendmsg = __lock_##name##_sendmsg, \ 2881da177e4SLinus Torvalds .recvmsg = __lock_##name##_recvmsg, \ 2891da177e4SLinus Torvalds .mmap = __lock_##name##_mmap, \ 2901da177e4SLinus Torvalds }; 29189bbfc95SShaun Pereira 2921da177e4SLinus Torvalds #endif 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds #define MODULE_ALIAS_NETPROTO(proto) \ 2951da177e4SLinus Torvalds MODULE_ALIAS("net-pf-" __stringify(proto)) 2961da177e4SLinus Torvalds 2974fdb3bb7SHarald Welte #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 2984fdb3bb7SHarald Welte MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 2994fdb3bb7SHarald Welte 30020380731SArnaldo Carvalho de Melo #ifdef CONFIG_SYSCTL 30120380731SArnaldo Carvalho de Melo #include <linux/sysctl.h> 30220380731SArnaldo Carvalho de Melo extern ctl_table net_table[]; 30320380731SArnaldo Carvalho de Melo extern int net_msg_cost; 30420380731SArnaldo Carvalho de Melo extern int net_msg_burst; 30520380731SArnaldo Carvalho de Melo #endif 30620380731SArnaldo Carvalho de Melo 3071da177e4SLinus Torvalds #endif /* __KERNEL__ */ 3081da177e4SLinus Torvalds #endif /* _LINUX_NET_H */ 309