1*1da177e4SLinus Torvalds /* 2*1da177e4SLinus Torvalds * NET An implementation of the SOCKET network access protocol. 3*1da177e4SLinus Torvalds * This is the master header file for the Linux NET layer, 4*1da177e4SLinus Torvalds * or, in plain English: the networking handling part of the 5*1da177e4SLinus Torvalds * kernel. 6*1da177e4SLinus Torvalds * 7*1da177e4SLinus Torvalds * Version: @(#)net.h 1.0.3 05/25/93 8*1da177e4SLinus Torvalds * 9*1da177e4SLinus Torvalds * Authors: Orest Zborowski, <obz@Kodak.COM> 10*1da177e4SLinus Torvalds * Ross Biro, <bir7@leland.Stanford.Edu> 11*1da177e4SLinus Torvalds * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12*1da177e4SLinus Torvalds * 13*1da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 14*1da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License 15*1da177e4SLinus Torvalds * as published by the Free Software Foundation; either version 16*1da177e4SLinus Torvalds * 2 of the License, or (at your option) any later version. 17*1da177e4SLinus Torvalds */ 18*1da177e4SLinus Torvalds #ifndef _LINUX_NET_H 19*1da177e4SLinus Torvalds #define _LINUX_NET_H 20*1da177e4SLinus Torvalds 21*1da177e4SLinus Torvalds #include <linux/config.h> 22*1da177e4SLinus Torvalds #include <linux/wait.h> 23*1da177e4SLinus Torvalds #include <linux/stringify.h> 24*1da177e4SLinus Torvalds #include <asm/socket.h> 25*1da177e4SLinus Torvalds 26*1da177e4SLinus Torvalds struct poll_table_struct; 27*1da177e4SLinus Torvalds struct inode; 28*1da177e4SLinus Torvalds 29*1da177e4SLinus Torvalds #define NPROTO 32 /* should be enough for now.. */ 30*1da177e4SLinus Torvalds 31*1da177e4SLinus Torvalds #define SYS_SOCKET 1 /* sys_socket(2) */ 32*1da177e4SLinus Torvalds #define SYS_BIND 2 /* sys_bind(2) */ 33*1da177e4SLinus Torvalds #define SYS_CONNECT 3 /* sys_connect(2) */ 34*1da177e4SLinus Torvalds #define SYS_LISTEN 4 /* sys_listen(2) */ 35*1da177e4SLinus Torvalds #define SYS_ACCEPT 5 /* sys_accept(2) */ 36*1da177e4SLinus Torvalds #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ 37*1da177e4SLinus Torvalds #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ 38*1da177e4SLinus Torvalds #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ 39*1da177e4SLinus Torvalds #define SYS_SEND 9 /* sys_send(2) */ 40*1da177e4SLinus Torvalds #define SYS_RECV 10 /* sys_recv(2) */ 41*1da177e4SLinus Torvalds #define SYS_SENDTO 11 /* sys_sendto(2) */ 42*1da177e4SLinus Torvalds #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ 43*1da177e4SLinus Torvalds #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ 44*1da177e4SLinus Torvalds #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ 45*1da177e4SLinus Torvalds #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ 46*1da177e4SLinus Torvalds #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ 47*1da177e4SLinus Torvalds #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ 48*1da177e4SLinus Torvalds 49*1da177e4SLinus Torvalds typedef enum { 50*1da177e4SLinus Torvalds SS_FREE = 0, /* not allocated */ 51*1da177e4SLinus Torvalds SS_UNCONNECTED, /* unconnected to any socket */ 52*1da177e4SLinus Torvalds SS_CONNECTING, /* in process of connecting */ 53*1da177e4SLinus Torvalds SS_CONNECTED, /* connected to socket */ 54*1da177e4SLinus Torvalds SS_DISCONNECTING /* in process of disconnecting */ 55*1da177e4SLinus Torvalds } socket_state; 56*1da177e4SLinus Torvalds 57*1da177e4SLinus Torvalds #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ 58*1da177e4SLinus Torvalds 59*1da177e4SLinus Torvalds #ifdef __KERNEL__ 60*1da177e4SLinus Torvalds 61*1da177e4SLinus Torvalds #define SOCK_ASYNC_NOSPACE 0 62*1da177e4SLinus Torvalds #define SOCK_ASYNC_WAITDATA 1 63*1da177e4SLinus Torvalds #define SOCK_NOSPACE 2 64*1da177e4SLinus Torvalds #define SOCK_PASSCRED 3 65*1da177e4SLinus Torvalds 66*1da177e4SLinus Torvalds #ifndef ARCH_HAS_SOCKET_TYPES 67*1da177e4SLinus Torvalds /** sock_type - Socket types 68*1da177e4SLinus Torvalds * 69*1da177e4SLinus Torvalds * When adding some new socket type please 70*1da177e4SLinus Torvalds * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS 71*1da177e4SLinus Torvalds * overrides this enum for binary compat reasons. 72*1da177e4SLinus Torvalds * 73*1da177e4SLinus Torvalds * @SOCK_STREAM - stream (connection) socket 74*1da177e4SLinus Torvalds * @SOCK_DGRAM - datagram (conn.less) socket 75*1da177e4SLinus Torvalds * @SOCK_RAW - raw socket 76*1da177e4SLinus Torvalds * @SOCK_RDM - reliably-delivered message 77*1da177e4SLinus Torvalds * @SOCK_SEQPACKET - sequential packet socket 78*1da177e4SLinus Torvalds * @SOCK_PACKET - linux specific way of getting packets at the dev level. 79*1da177e4SLinus Torvalds * For writing rarp and other similar things on the user level. 80*1da177e4SLinus Torvalds */ 81*1da177e4SLinus Torvalds enum sock_type { 82*1da177e4SLinus Torvalds SOCK_STREAM = 1, 83*1da177e4SLinus Torvalds SOCK_DGRAM = 2, 84*1da177e4SLinus Torvalds SOCK_RAW = 3, 85*1da177e4SLinus Torvalds SOCK_RDM = 4, 86*1da177e4SLinus Torvalds SOCK_SEQPACKET = 5, 87*1da177e4SLinus Torvalds SOCK_PACKET = 10, 88*1da177e4SLinus Torvalds }; 89*1da177e4SLinus Torvalds 90*1da177e4SLinus Torvalds #define SOCK_MAX (SOCK_PACKET + 1) 91*1da177e4SLinus Torvalds 92*1da177e4SLinus Torvalds #endif /* ARCH_HAS_SOCKET_TYPES */ 93*1da177e4SLinus Torvalds 94*1da177e4SLinus Torvalds /** 95*1da177e4SLinus Torvalds * struct socket - general BSD socket 96*1da177e4SLinus Torvalds * @state - socket state (%SS_CONNECTED, etc) 97*1da177e4SLinus Torvalds * @flags - socket flags (%SOCK_ASYNC_NOSPACE, etc) 98*1da177e4SLinus Torvalds * @ops - protocol specific socket operations 99*1da177e4SLinus Torvalds * @fasync_list - Asynchronous wake up list 100*1da177e4SLinus Torvalds * @file - File back pointer for gc 101*1da177e4SLinus Torvalds * @sk - internal networking protocol agnostic socket representation 102*1da177e4SLinus Torvalds * @wait - wait queue for several uses 103*1da177e4SLinus Torvalds * @type - socket type (%SOCK_STREAM, etc) 104*1da177e4SLinus Torvalds * @passcred - credentials (used only in Unix Sockets (aka PF_LOCAL)) 105*1da177e4SLinus Torvalds */ 106*1da177e4SLinus Torvalds struct socket { 107*1da177e4SLinus Torvalds socket_state state; 108*1da177e4SLinus Torvalds unsigned long flags; 109*1da177e4SLinus Torvalds struct proto_ops *ops; 110*1da177e4SLinus Torvalds struct fasync_struct *fasync_list; 111*1da177e4SLinus Torvalds struct file *file; 112*1da177e4SLinus Torvalds struct sock *sk; 113*1da177e4SLinus Torvalds wait_queue_head_t wait; 114*1da177e4SLinus Torvalds short type; 115*1da177e4SLinus Torvalds }; 116*1da177e4SLinus Torvalds 117*1da177e4SLinus Torvalds struct vm_area_struct; 118*1da177e4SLinus Torvalds struct page; 119*1da177e4SLinus Torvalds struct kiocb; 120*1da177e4SLinus Torvalds struct sockaddr; 121*1da177e4SLinus Torvalds struct msghdr; 122*1da177e4SLinus Torvalds struct module; 123*1da177e4SLinus Torvalds 124*1da177e4SLinus Torvalds struct proto_ops { 125*1da177e4SLinus Torvalds int family; 126*1da177e4SLinus Torvalds struct module *owner; 127*1da177e4SLinus Torvalds int (*release) (struct socket *sock); 128*1da177e4SLinus Torvalds int (*bind) (struct socket *sock, 129*1da177e4SLinus Torvalds struct sockaddr *myaddr, 130*1da177e4SLinus Torvalds int sockaddr_len); 131*1da177e4SLinus Torvalds int (*connect) (struct socket *sock, 132*1da177e4SLinus Torvalds struct sockaddr *vaddr, 133*1da177e4SLinus Torvalds int sockaddr_len, int flags); 134*1da177e4SLinus Torvalds int (*socketpair)(struct socket *sock1, 135*1da177e4SLinus Torvalds struct socket *sock2); 136*1da177e4SLinus Torvalds int (*accept) (struct socket *sock, 137*1da177e4SLinus Torvalds struct socket *newsock, int flags); 138*1da177e4SLinus Torvalds int (*getname) (struct socket *sock, 139*1da177e4SLinus Torvalds struct sockaddr *addr, 140*1da177e4SLinus Torvalds int *sockaddr_len, int peer); 141*1da177e4SLinus Torvalds unsigned int (*poll) (struct file *file, struct socket *sock, 142*1da177e4SLinus Torvalds struct poll_table_struct *wait); 143*1da177e4SLinus Torvalds int (*ioctl) (struct socket *sock, unsigned int cmd, 144*1da177e4SLinus Torvalds unsigned long arg); 145*1da177e4SLinus Torvalds int (*listen) (struct socket *sock, int len); 146*1da177e4SLinus Torvalds int (*shutdown) (struct socket *sock, int flags); 147*1da177e4SLinus Torvalds int (*setsockopt)(struct socket *sock, int level, 148*1da177e4SLinus Torvalds int optname, char __user *optval, int optlen); 149*1da177e4SLinus Torvalds int (*getsockopt)(struct socket *sock, int level, 150*1da177e4SLinus Torvalds int optname, char __user *optval, int __user *optlen); 151*1da177e4SLinus Torvalds int (*sendmsg) (struct kiocb *iocb, struct socket *sock, 152*1da177e4SLinus Torvalds struct msghdr *m, size_t total_len); 153*1da177e4SLinus Torvalds int (*recvmsg) (struct kiocb *iocb, struct socket *sock, 154*1da177e4SLinus Torvalds struct msghdr *m, size_t total_len, 155*1da177e4SLinus Torvalds int flags); 156*1da177e4SLinus Torvalds int (*mmap) (struct file *file, struct socket *sock, 157*1da177e4SLinus Torvalds struct vm_area_struct * vma); 158*1da177e4SLinus Torvalds ssize_t (*sendpage) (struct socket *sock, struct page *page, 159*1da177e4SLinus Torvalds int offset, size_t size, int flags); 160*1da177e4SLinus Torvalds }; 161*1da177e4SLinus Torvalds 162*1da177e4SLinus Torvalds struct net_proto_family { 163*1da177e4SLinus Torvalds int family; 164*1da177e4SLinus Torvalds int (*create)(struct socket *sock, int protocol); 165*1da177e4SLinus Torvalds /* These are counters for the number of different methods of 166*1da177e4SLinus Torvalds each we support */ 167*1da177e4SLinus Torvalds short authentication; 168*1da177e4SLinus Torvalds short encryption; 169*1da177e4SLinus Torvalds short encrypt_net; 170*1da177e4SLinus Torvalds struct module *owner; 171*1da177e4SLinus Torvalds }; 172*1da177e4SLinus Torvalds 173*1da177e4SLinus Torvalds struct iovec; 174*1da177e4SLinus Torvalds struct kvec; 175*1da177e4SLinus Torvalds 176*1da177e4SLinus Torvalds extern int sock_wake_async(struct socket *sk, int how, int band); 177*1da177e4SLinus Torvalds extern int sock_register(struct net_proto_family *fam); 178*1da177e4SLinus Torvalds extern int sock_unregister(int family); 179*1da177e4SLinus Torvalds extern int sock_create(int family, int type, int proto, 180*1da177e4SLinus Torvalds struct socket **res); 181*1da177e4SLinus Torvalds extern int sock_create_kern(int family, int type, int proto, 182*1da177e4SLinus Torvalds struct socket **res); 183*1da177e4SLinus Torvalds extern int sock_create_lite(int family, int type, int proto, 184*1da177e4SLinus Torvalds struct socket **res); 185*1da177e4SLinus Torvalds extern void sock_release(struct socket *sock); 186*1da177e4SLinus Torvalds extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, 187*1da177e4SLinus Torvalds size_t len); 188*1da177e4SLinus Torvalds extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, 189*1da177e4SLinus Torvalds size_t size, int flags); 190*1da177e4SLinus Torvalds extern int sock_map_fd(struct socket *sock); 191*1da177e4SLinus Torvalds extern struct socket *sockfd_lookup(int fd, int *err); 192*1da177e4SLinus Torvalds #define sockfd_put(sock) fput(sock->file) 193*1da177e4SLinus Torvalds extern int net_ratelimit(void); 194*1da177e4SLinus Torvalds extern unsigned long net_random(void); 195*1da177e4SLinus Torvalds extern void net_srandom(unsigned long); 196*1da177e4SLinus Torvalds extern void net_random_init(void); 197*1da177e4SLinus Torvalds 198*1da177e4SLinus Torvalds extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, 199*1da177e4SLinus Torvalds struct kvec *vec, size_t num, size_t len); 200*1da177e4SLinus Torvalds extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, 201*1da177e4SLinus Torvalds struct kvec *vec, size_t num, 202*1da177e4SLinus Torvalds size_t len, int flags); 203*1da177e4SLinus Torvalds 204*1da177e4SLinus Torvalds #ifndef CONFIG_SMP 205*1da177e4SLinus Torvalds #define SOCKOPS_WRAPPED(name) name 206*1da177e4SLinus Torvalds #define SOCKOPS_WRAP(name, fam) 207*1da177e4SLinus Torvalds #else 208*1da177e4SLinus Torvalds 209*1da177e4SLinus Torvalds #define SOCKOPS_WRAPPED(name) __unlocked_##name 210*1da177e4SLinus Torvalds 211*1da177e4SLinus Torvalds #define SOCKCALL_WRAP(name, call, parms, args) \ 212*1da177e4SLinus Torvalds static int __lock_##name##_##call parms \ 213*1da177e4SLinus Torvalds { \ 214*1da177e4SLinus Torvalds int ret; \ 215*1da177e4SLinus Torvalds lock_kernel(); \ 216*1da177e4SLinus Torvalds ret = __unlocked_##name##_ops.call args ;\ 217*1da177e4SLinus Torvalds unlock_kernel(); \ 218*1da177e4SLinus Torvalds return ret; \ 219*1da177e4SLinus Torvalds } 220*1da177e4SLinus Torvalds 221*1da177e4SLinus Torvalds #define SOCKCALL_UWRAP(name, call, parms, args) \ 222*1da177e4SLinus Torvalds static unsigned int __lock_##name##_##call parms \ 223*1da177e4SLinus Torvalds { \ 224*1da177e4SLinus Torvalds int ret; \ 225*1da177e4SLinus Torvalds lock_kernel(); \ 226*1da177e4SLinus Torvalds ret = __unlocked_##name##_ops.call args ;\ 227*1da177e4SLinus Torvalds unlock_kernel(); \ 228*1da177e4SLinus Torvalds return ret; \ 229*1da177e4SLinus Torvalds } 230*1da177e4SLinus Torvalds 231*1da177e4SLinus Torvalds 232*1da177e4SLinus Torvalds #define SOCKOPS_WRAP(name, fam) \ 233*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ 234*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ 235*1da177e4SLinus Torvalds (sock, uaddr, addr_len)) \ 236*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ 237*1da177e4SLinus Torvalds int addr_len, int flags), \ 238*1da177e4SLinus Torvalds (sock, uaddr, addr_len, flags)) \ 239*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ 240*1da177e4SLinus Torvalds (sock1, sock2)) \ 241*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ 242*1da177e4SLinus Torvalds int flags), (sock, newsock, flags)) \ 243*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ 244*1da177e4SLinus Torvalds int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ 245*1da177e4SLinus Torvalds SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ 246*1da177e4SLinus Torvalds (file, sock, wait)) \ 247*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ 248*1da177e4SLinus Torvalds unsigned long arg), (sock, cmd, arg)) \ 249*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ 250*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ 251*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ 252*1da177e4SLinus Torvalds char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ 253*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ 254*1da177e4SLinus Torvalds char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ 255*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ 256*1da177e4SLinus Torvalds (iocb, sock, m, len)) \ 257*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ 258*1da177e4SLinus Torvalds (iocb, sock, m, len, flags)) \ 259*1da177e4SLinus Torvalds SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ 260*1da177e4SLinus Torvalds (file, sock, vma)) \ 261*1da177e4SLinus Torvalds \ 262*1da177e4SLinus Torvalds static struct proto_ops name##_ops = { \ 263*1da177e4SLinus Torvalds .family = fam, \ 264*1da177e4SLinus Torvalds .owner = THIS_MODULE, \ 265*1da177e4SLinus Torvalds .release = __lock_##name##_release, \ 266*1da177e4SLinus Torvalds .bind = __lock_##name##_bind, \ 267*1da177e4SLinus Torvalds .connect = __lock_##name##_connect, \ 268*1da177e4SLinus Torvalds .socketpair = __lock_##name##_socketpair, \ 269*1da177e4SLinus Torvalds .accept = __lock_##name##_accept, \ 270*1da177e4SLinus Torvalds .getname = __lock_##name##_getname, \ 271*1da177e4SLinus Torvalds .poll = __lock_##name##_poll, \ 272*1da177e4SLinus Torvalds .ioctl = __lock_##name##_ioctl, \ 273*1da177e4SLinus Torvalds .listen = __lock_##name##_listen, \ 274*1da177e4SLinus Torvalds .shutdown = __lock_##name##_shutdown, \ 275*1da177e4SLinus Torvalds .setsockopt = __lock_##name##_setsockopt, \ 276*1da177e4SLinus Torvalds .getsockopt = __lock_##name##_getsockopt, \ 277*1da177e4SLinus Torvalds .sendmsg = __lock_##name##_sendmsg, \ 278*1da177e4SLinus Torvalds .recvmsg = __lock_##name##_recvmsg, \ 279*1da177e4SLinus Torvalds .mmap = __lock_##name##_mmap, \ 280*1da177e4SLinus Torvalds }; 281*1da177e4SLinus Torvalds #endif 282*1da177e4SLinus Torvalds 283*1da177e4SLinus Torvalds #define MODULE_ALIAS_NETPROTO(proto) \ 284*1da177e4SLinus Torvalds MODULE_ALIAS("net-pf-" __stringify(proto)) 285*1da177e4SLinus Torvalds 286*1da177e4SLinus Torvalds #endif /* __KERNEL__ */ 287*1da177e4SLinus Torvalds #endif /* _LINUX_NET_H */ 288