Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/wait.h> |
Stephen Hemminger | aaa248f | 2006-10-17 00:09:42 -0700 | [diff] [blame] | 22 | #include <linux/random.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <asm/socket.h> |
| 24 | |
| 25 | struct poll_table_struct; |
| 26 | struct inode; |
| 27 | |
| 28 | #define NPROTO 32 /* should be enough for now.. */ |
| 29 | |
| 30 | #define SYS_SOCKET 1 /* sys_socket(2) */ |
| 31 | #define SYS_BIND 2 /* sys_bind(2) */ |
| 32 | #define SYS_CONNECT 3 /* sys_connect(2) */ |
| 33 | #define SYS_LISTEN 4 /* sys_listen(2) */ |
| 34 | #define SYS_ACCEPT 5 /* sys_accept(2) */ |
| 35 | #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ |
| 36 | #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ |
| 37 | #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ |
| 38 | #define SYS_SEND 9 /* sys_send(2) */ |
| 39 | #define SYS_RECV 10 /* sys_recv(2) */ |
| 40 | #define SYS_SENDTO 11 /* sys_sendto(2) */ |
| 41 | #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ |
| 42 | #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ |
| 43 | #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ |
| 44 | #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ |
| 45 | #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ |
| 46 | #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ |
| 47 | |
| 48 | typedef enum { |
| 49 | SS_FREE = 0, /* not allocated */ |
| 50 | SS_UNCONNECTED, /* unconnected to any socket */ |
| 51 | SS_CONNECTING, /* in process of connecting */ |
| 52 | SS_CONNECTED, /* connected to socket */ |
| 53 | SS_DISCONNECTING /* in process of disconnecting */ |
| 54 | } socket_state; |
| 55 | |
| 56 | #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ |
| 57 | |
| 58 | #ifdef __KERNEL__ |
David Woodhouse | eacf17b | 2006-04-25 14:46:09 +0100 | [diff] [blame] | 59 | #include <linux/stringify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | |
| 61 | #define SOCK_ASYNC_NOSPACE 0 |
| 62 | #define SOCK_ASYNC_WAITDATA 1 |
| 63 | #define SOCK_NOSPACE 2 |
| 64 | #define SOCK_PASSCRED 3 |
Catherine Zhang | 877ce7c | 2006-06-29 12:27:47 -0700 | [diff] [blame] | 65 | #define SOCK_PASSSEC 4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | |
| 67 | #ifndef ARCH_HAS_SOCKET_TYPES |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 68 | /** |
| 69 | * enum sock_type - Socket types |
| 70 | * @SOCK_STREAM: stream (connection) socket |
| 71 | * @SOCK_DGRAM: datagram (conn.less) socket |
| 72 | * @SOCK_RAW: raw socket |
| 73 | * @SOCK_RDM: reliably-delivered message |
| 74 | * @SOCK_SEQPACKET: sequential packet socket |
Randy Dunlap | 8f2709b | 2005-11-07 01:01:05 -0800 | [diff] [blame] | 75 | * @SOCK_DCCP: Datagram Congestion Control Protocol socket |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 76 | * @SOCK_PACKET: linux specific way of getting packets at the dev level. |
| 77 | * For writing rarp and other similar things on the user level. |
| 78 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | * When adding some new socket type please |
| 80 | * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS |
| 81 | * overrides this enum for binary compat reasons. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | */ |
| 83 | enum sock_type { |
| 84 | SOCK_STREAM = 1, |
| 85 | SOCK_DGRAM = 2, |
| 86 | SOCK_RAW = 3, |
| 87 | SOCK_RDM = 4, |
| 88 | SOCK_SEQPACKET = 5, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 89 | SOCK_DCCP = 6, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | SOCK_PACKET = 10, |
| 91 | }; |
| 92 | |
| 93 | #define SOCK_MAX (SOCK_PACKET + 1) |
| 94 | |
| 95 | #endif /* ARCH_HAS_SOCKET_TYPES */ |
| 96 | |
| 97 | /** |
| 98 | * struct socket - general BSD socket |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 99 | * @state: socket state (%SS_CONNECTED, etc) |
| 100 | * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) |
| 101 | * @ops: protocol specific socket operations |
| 102 | * @fasync_list: Asynchronous wake up list |
| 103 | * @file: File back pointer for gc |
| 104 | * @sk: internal networking protocol agnostic socket representation |
| 105 | * @wait: wait queue for several uses |
| 106 | * @type: socket type (%SOCK_STREAM, etc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | */ |
| 108 | struct socket { |
| 109 | socket_state state; |
| 110 | unsigned long flags; |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 111 | const struct proto_ops *ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | struct fasync_struct *fasync_list; |
| 113 | struct file *file; |
| 114 | struct sock *sk; |
| 115 | wait_queue_head_t wait; |
| 116 | short type; |
| 117 | }; |
| 118 | |
| 119 | struct vm_area_struct; |
| 120 | struct page; |
| 121 | struct kiocb; |
| 122 | struct sockaddr; |
| 123 | struct msghdr; |
| 124 | struct module; |
| 125 | |
| 126 | struct proto_ops { |
| 127 | int family; |
| 128 | struct module *owner; |
| 129 | int (*release) (struct socket *sock); |
| 130 | int (*bind) (struct socket *sock, |
| 131 | struct sockaddr *myaddr, |
| 132 | int sockaddr_len); |
| 133 | int (*connect) (struct socket *sock, |
| 134 | struct sockaddr *vaddr, |
| 135 | int sockaddr_len, int flags); |
| 136 | int (*socketpair)(struct socket *sock1, |
| 137 | struct socket *sock2); |
| 138 | int (*accept) (struct socket *sock, |
| 139 | struct socket *newsock, int flags); |
| 140 | int (*getname) (struct socket *sock, |
| 141 | struct sockaddr *addr, |
| 142 | int *sockaddr_len, int peer); |
| 143 | unsigned int (*poll) (struct file *file, struct socket *sock, |
| 144 | struct poll_table_struct *wait); |
| 145 | int (*ioctl) (struct socket *sock, unsigned int cmd, |
| 146 | unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 147 | int (*compat_ioctl) (struct socket *sock, unsigned int cmd, |
| 148 | unsigned long arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | int (*listen) (struct socket *sock, int len); |
| 150 | int (*shutdown) (struct socket *sock, int flags); |
| 151 | int (*setsockopt)(struct socket *sock, int level, |
| 152 | int optname, char __user *optval, int optlen); |
| 153 | int (*getsockopt)(struct socket *sock, int level, |
| 154 | int optname, char __user *optval, int __user *optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 155 | int (*compat_setsockopt)(struct socket *sock, int level, |
| 156 | int optname, char __user *optval, int optlen); |
| 157 | int (*compat_getsockopt)(struct socket *sock, int level, |
| 158 | int optname, char __user *optval, int __user *optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, |
| 160 | struct msghdr *m, size_t total_len); |
| 161 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, |
| 162 | struct msghdr *m, size_t total_len, |
| 163 | int flags); |
| 164 | int (*mmap) (struct file *file, struct socket *sock, |
| 165 | struct vm_area_struct * vma); |
| 166 | ssize_t (*sendpage) (struct socket *sock, struct page *page, |
| 167 | int offset, size_t size, int flags); |
| 168 | }; |
| 169 | |
| 170 | struct net_proto_family { |
| 171 | int family; |
| 172 | int (*create)(struct socket *sock, int protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | struct module *owner; |
| 174 | }; |
| 175 | |
| 176 | struct iovec; |
| 177 | struct kvec; |
| 178 | |
| 179 | extern int sock_wake_async(struct socket *sk, int how, int band); |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 180 | extern int sock_register(const struct net_proto_family *fam); |
| 181 | extern void sock_unregister(int family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | extern int sock_create(int family, int type, int proto, |
| 183 | struct socket **res); |
| 184 | extern int sock_create_kern(int family, int type, int proto, |
| 185 | struct socket **res); |
| 186 | extern int sock_create_lite(int family, int type, int proto, |
| 187 | struct socket **res); |
| 188 | extern void sock_release(struct socket *sock); |
| 189 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, |
| 190 | size_t len); |
| 191 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
| 192 | size_t size, int flags); |
| 193 | extern int sock_map_fd(struct socket *sock); |
| 194 | extern struct socket *sockfd_lookup(int fd, int *err); |
| 195 | #define sockfd_put(sock) fput(sock->file) |
| 196 | extern int net_ratelimit(void); |
Stephen Hemminger | aaa248f | 2006-10-17 00:09:42 -0700 | [diff] [blame] | 197 | |
| 198 | #define net_random() random32() |
Al Viro | a64b78a | 2006-11-14 21:12:29 -0800 | [diff] [blame] | 199 | #define net_srandom(seed) srandom32((__force u32)seed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 202 | struct kvec *vec, size_t num, size_t len); |
| 203 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 204 | struct kvec *vec, size_t num, |
| 205 | size_t len, int flags); |
| 206 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 207 | extern int kernel_bind(struct socket *sock, struct sockaddr *addr, |
| 208 | int addrlen); |
| 209 | extern int kernel_listen(struct socket *sock, int backlog); |
| 210 | extern int kernel_accept(struct socket *sock, struct socket **newsock, |
| 211 | int flags); |
| 212 | extern int kernel_connect(struct socket *sock, struct sockaddr *addr, |
| 213 | int addrlen, int flags); |
| 214 | extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 215 | int *addrlen); |
| 216 | extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 217 | int *addrlen); |
| 218 | extern int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 219 | char *optval, int *optlen); |
| 220 | extern int kernel_setsockopt(struct socket *sock, int level, int optname, |
| 221 | char *optval, int optlen); |
| 222 | extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 223 | size_t size, int flags); |
| 224 | extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); |
| 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | #ifndef CONFIG_SMP |
| 227 | #define SOCKOPS_WRAPPED(name) name |
| 228 | #define SOCKOPS_WRAP(name, fam) |
| 229 | #else |
| 230 | |
| 231 | #define SOCKOPS_WRAPPED(name) __unlocked_##name |
| 232 | |
| 233 | #define SOCKCALL_WRAP(name, call, parms, args) \ |
| 234 | static int __lock_##name##_##call parms \ |
| 235 | { \ |
| 236 | int ret; \ |
| 237 | lock_kernel(); \ |
| 238 | ret = __unlocked_##name##_ops.call args ;\ |
| 239 | unlock_kernel(); \ |
| 240 | return ret; \ |
| 241 | } |
| 242 | |
| 243 | #define SOCKCALL_UWRAP(name, call, parms, args) \ |
| 244 | static unsigned int __lock_##name##_##call parms \ |
| 245 | { \ |
| 246 | int ret; \ |
| 247 | lock_kernel(); \ |
| 248 | ret = __unlocked_##name##_ops.call args ;\ |
| 249 | unlock_kernel(); \ |
| 250 | return ret; \ |
| 251 | } |
| 252 | |
| 253 | |
| 254 | #define SOCKOPS_WRAP(name, fam) \ |
| 255 | SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ |
| 256 | SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ |
| 257 | (sock, uaddr, addr_len)) \ |
| 258 | SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ |
| 259 | int addr_len, int flags), \ |
| 260 | (sock, uaddr, addr_len, flags)) \ |
| 261 | SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ |
| 262 | (sock1, sock2)) \ |
| 263 | SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ |
| 264 | int flags), (sock, newsock, flags)) \ |
| 265 | SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ |
| 266 | int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ |
| 267 | SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ |
| 268 | (file, sock, wait)) \ |
| 269 | SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ |
| 270 | unsigned long arg), (sock, cmd, arg)) \ |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 271 | SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \ |
| 272 | unsigned long arg), (sock, cmd, arg)) \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ |
| 274 | SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ |
| 275 | SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ |
| 276 | char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ |
| 277 | SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ |
| 278 | char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ |
| 279 | SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ |
| 280 | (iocb, sock, m, len)) \ |
| 281 | SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ |
| 282 | (iocb, sock, m, len, flags)) \ |
| 283 | SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ |
| 284 | (file, sock, vma)) \ |
| 285 | \ |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 286 | static const struct proto_ops name##_ops = { \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | .family = fam, \ |
| 288 | .owner = THIS_MODULE, \ |
| 289 | .release = __lock_##name##_release, \ |
| 290 | .bind = __lock_##name##_bind, \ |
| 291 | .connect = __lock_##name##_connect, \ |
| 292 | .socketpair = __lock_##name##_socketpair, \ |
| 293 | .accept = __lock_##name##_accept, \ |
| 294 | .getname = __lock_##name##_getname, \ |
| 295 | .poll = __lock_##name##_poll, \ |
| 296 | .ioctl = __lock_##name##_ioctl, \ |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 297 | .compat_ioctl = __lock_##name##_compat_ioctl, \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | .listen = __lock_##name##_listen, \ |
| 299 | .shutdown = __lock_##name##_shutdown, \ |
| 300 | .setsockopt = __lock_##name##_setsockopt, \ |
| 301 | .getsockopt = __lock_##name##_getsockopt, \ |
| 302 | .sendmsg = __lock_##name##_sendmsg, \ |
| 303 | .recvmsg = __lock_##name##_recvmsg, \ |
| 304 | .mmap = __lock_##name##_mmap, \ |
| 305 | }; |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | #endif |
| 308 | |
| 309 | #define MODULE_ALIAS_NETPROTO(proto) \ |
| 310 | MODULE_ALIAS("net-pf-" __stringify(proto)) |
| 311 | |
Harald Welte | 4fdb3bb | 2005-08-09 19:40:55 -0700 | [diff] [blame] | 312 | #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ |
| 313 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) |
| 314 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 315 | #ifdef CONFIG_SYSCTL |
| 316 | #include <linux/sysctl.h> |
| 317 | extern ctl_table net_table[]; |
| 318 | extern int net_msg_cost; |
| 319 | extern int net_msg_burst; |
| 320 | #endif |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | #endif /* __KERNEL__ */ |
| 323 | #endif /* _LINUX_NET_H */ |