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, <[email protected]> 10 * Ross Biro 11 * Fred N. van Kempen, <[email protected]> 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 21 #include <linux/wait.h> 22 #include <asm/socket.h> 23 24 struct poll_table_struct; 25 struct inode; 26 27 #define NPROTO 32 /* should be enough for now.. */ 28 29 #define SYS_SOCKET 1 /* sys_socket(2) */ 30 #define SYS_BIND 2 /* sys_bind(2) */ 31 #define SYS_CONNECT 3 /* sys_connect(2) */ 32 #define SYS_LISTEN 4 /* sys_listen(2) */ 33 #define SYS_ACCEPT 5 /* sys_accept(2) */ 34 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ 35 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ 36 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ 37 #define SYS_SEND 9 /* sys_send(2) */ 38 #define SYS_RECV 10 /* sys_recv(2) */ 39 #define SYS_SENDTO 11 /* sys_sendto(2) */ 40 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ 41 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ 42 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ 43 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ 44 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ 45 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ 46 47 typedef enum { 48 SS_FREE = 0, /* not allocated */ 49 SS_UNCONNECTED, /* unconnected to any socket */ 50 SS_CONNECTING, /* in process of connecting */ 51 SS_CONNECTED, /* connected to socket */ 52 SS_DISCONNECTING /* in process of disconnecting */ 53 } socket_state; 54 55 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ 56 57 #ifdef __KERNEL__ 58 #include <linux/stringify.h> 59 #include <linux/random.h> 60 61 #define SOCK_ASYNC_NOSPACE 0 62 #define SOCK_ASYNC_WAITDATA 1 63 #define SOCK_NOSPACE 2 64 #define SOCK_PASSCRED 3 65 #define SOCK_PASSSEC 4 66 67 #ifndef ARCH_HAS_SOCKET_TYPES 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 75 * @SOCK_DCCP: Datagram Congestion Control Protocol socket 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 * 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. 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, 89 SOCK_DCCP = 6, 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 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) 107 */ 108 struct socket { 109 socket_state state; 110 unsigned long flags; 111 const struct proto_ops *ops; 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); 147 int (*compat_ioctl) (struct socket *sock, unsigned int cmd, 148 unsigned long arg); 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); 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); 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); 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); 180 extern int sock_register(const struct net_proto_family *fam); 181 extern void sock_unregister(int family); 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); 197 198 #define net_random() random32() 199 #define net_srandom(seed) srandom32((__force u32)seed) 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); 206 207 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); 225 226 #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)) \ 271 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \ 272 unsigned long arg), (sock, cmd, arg)) \ 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 \ 286 static const struct proto_ops name##_ops = { \ 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, \ 297 .compat_ioctl = __lock_##name##_compat_ioctl, \ 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 }; 306 307 #endif 308 309 #define MODULE_ALIAS_NETPROTO(proto) \ 310 MODULE_ALIAS("net-pf-" __stringify(proto)) 311 312 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 313 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 314 315 #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 321 322 #endif /* __KERNEL__ */ 323 #endif /* _LINUX_NET_H */ 324