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 60 #define SOCK_ASYNC_NOSPACE 0 61 #define SOCK_ASYNC_WAITDATA 1 62 #define SOCK_NOSPACE 2 63 #define SOCK_PASSCRED 3 64 65 #ifndef ARCH_HAS_SOCKET_TYPES 66 /** 67 * enum sock_type - Socket types 68 * @SOCK_STREAM: stream (connection) socket 69 * @SOCK_DGRAM: datagram (conn.less) socket 70 * @SOCK_RAW: raw socket 71 * @SOCK_RDM: reliably-delivered message 72 * @SOCK_SEQPACKET: sequential packet socket 73 * @SOCK_DCCP: Datagram Congestion Control Protocol socket 74 * @SOCK_PACKET: linux specific way of getting packets at the dev level. 75 * For writing rarp and other similar things on the user level. 76 * 77 * When adding some new socket type please 78 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS 79 * overrides this enum for binary compat reasons. 80 */ 81 enum sock_type { 82 SOCK_STREAM = 1, 83 SOCK_DGRAM = 2, 84 SOCK_RAW = 3, 85 SOCK_RDM = 4, 86 SOCK_SEQPACKET = 5, 87 SOCK_DCCP = 6, 88 SOCK_PACKET = 10, 89 }; 90 91 #define SOCK_MAX (SOCK_PACKET + 1) 92 93 #endif /* ARCH_HAS_SOCKET_TYPES */ 94 95 /** 96 * struct socket - general BSD socket 97 * @state: socket state (%SS_CONNECTED, etc) 98 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) 99 * @ops: protocol specific socket operations 100 * @fasync_list: Asynchronous wake up list 101 * @file: File back pointer for gc 102 * @sk: internal networking protocol agnostic socket representation 103 * @wait: wait queue for several uses 104 * @type: socket type (%SOCK_STREAM, etc) 105 */ 106 struct socket { 107 socket_state state; 108 unsigned long flags; 109 const struct proto_ops *ops; 110 struct fasync_struct *fasync_list; 111 struct file *file; 112 struct sock *sk; 113 wait_queue_head_t wait; 114 short type; 115 }; 116 117 struct vm_area_struct; 118 struct page; 119 struct kiocb; 120 struct sockaddr; 121 struct msghdr; 122 struct module; 123 124 struct proto_ops { 125 int family; 126 struct module *owner; 127 int (*release) (struct socket *sock); 128 int (*bind) (struct socket *sock, 129 struct sockaddr *myaddr, 130 int sockaddr_len); 131 int (*connect) (struct socket *sock, 132 struct sockaddr *vaddr, 133 int sockaddr_len, int flags); 134 int (*socketpair)(struct socket *sock1, 135 struct socket *sock2); 136 int (*accept) (struct socket *sock, 137 struct socket *newsock, int flags); 138 int (*getname) (struct socket *sock, 139 struct sockaddr *addr, 140 int *sockaddr_len, int peer); 141 unsigned int (*poll) (struct file *file, struct socket *sock, 142 struct poll_table_struct *wait); 143 int (*ioctl) (struct socket *sock, unsigned int cmd, 144 unsigned long arg); 145 int (*compat_ioctl) (struct socket *sock, unsigned int cmd, 146 unsigned long arg); 147 int (*listen) (struct socket *sock, int len); 148 int (*shutdown) (struct socket *sock, int flags); 149 int (*setsockopt)(struct socket *sock, int level, 150 int optname, char __user *optval, int optlen); 151 int (*getsockopt)(struct socket *sock, int level, 152 int optname, char __user *optval, int __user *optlen); 153 int (*compat_setsockopt)(struct socket *sock, int level, 154 int optname, char __user *optval, int optlen); 155 int (*compat_getsockopt)(struct socket *sock, int level, 156 int optname, char __user *optval, int __user *optlen); 157 int (*sendmsg) (struct kiocb *iocb, struct socket *sock, 158 struct msghdr *m, size_t total_len); 159 int (*recvmsg) (struct kiocb *iocb, struct socket *sock, 160 struct msghdr *m, size_t total_len, 161 int flags); 162 int (*mmap) (struct file *file, struct socket *sock, 163 struct vm_area_struct * vma); 164 ssize_t (*sendpage) (struct socket *sock, struct page *page, 165 int offset, size_t size, int flags); 166 }; 167 168 struct net_proto_family { 169 int family; 170 int (*create)(struct socket *sock, int protocol); 171 /* These are counters for the number of different methods of 172 each we support */ 173 short authentication; 174 short encryption; 175 short encrypt_net; 176 struct module *owner; 177 }; 178 179 struct iovec; 180 struct kvec; 181 182 extern int sock_wake_async(struct socket *sk, int how, int band); 183 extern int sock_register(struct net_proto_family *fam); 184 extern int sock_unregister(int family); 185 extern int sock_create(int family, int type, int proto, 186 struct socket **res); 187 extern int sock_create_kern(int family, int type, int proto, 188 struct socket **res); 189 extern int sock_create_lite(int family, int type, int proto, 190 struct socket **res); 191 extern void sock_release(struct socket *sock); 192 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, 193 size_t len); 194 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, 195 size_t size, int flags); 196 extern int sock_map_fd(struct socket *sock); 197 extern struct socket *sockfd_lookup(int fd, int *err); 198 #define sockfd_put(sock) fput(sock->file) 199 extern int net_ratelimit(void); 200 extern unsigned long net_random(void); 201 extern void net_srandom(unsigned long); 202 extern void net_random_init(void); 203 204 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, 205 struct kvec *vec, size_t num, size_t len); 206 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, 207 struct kvec *vec, size_t num, 208 size_t len, int flags); 209 210 #ifndef CONFIG_SMP 211 #define SOCKOPS_WRAPPED(name) name 212 #define SOCKOPS_WRAP(name, fam) 213 #else 214 215 #define SOCKOPS_WRAPPED(name) __unlocked_##name 216 217 #define SOCKCALL_WRAP(name, call, parms, args) \ 218 static int __lock_##name##_##call parms \ 219 { \ 220 int ret; \ 221 lock_kernel(); \ 222 ret = __unlocked_##name##_ops.call args ;\ 223 unlock_kernel(); \ 224 return ret; \ 225 } 226 227 #define SOCKCALL_UWRAP(name, call, parms, args) \ 228 static unsigned int __lock_##name##_##call parms \ 229 { \ 230 int ret; \ 231 lock_kernel(); \ 232 ret = __unlocked_##name##_ops.call args ;\ 233 unlock_kernel(); \ 234 return ret; \ 235 } 236 237 238 #define SOCKOPS_WRAP(name, fam) \ 239 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ 240 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ 241 (sock, uaddr, addr_len)) \ 242 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ 243 int addr_len, int flags), \ 244 (sock, uaddr, addr_len, flags)) \ 245 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ 246 (sock1, sock2)) \ 247 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ 248 int flags), (sock, newsock, flags)) \ 249 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ 250 int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ 251 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ 252 (file, sock, wait)) \ 253 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ 254 unsigned long arg), (sock, cmd, arg)) \ 255 SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \ 256 unsigned long arg), (sock, cmd, arg)) \ 257 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ 258 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ 259 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ 260 char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ 261 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ 262 char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ 263 SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ 264 (iocb, sock, m, len)) \ 265 SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ 266 (iocb, sock, m, len, flags)) \ 267 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ 268 (file, sock, vma)) \ 269 \ 270 static const struct proto_ops name##_ops = { \ 271 .family = fam, \ 272 .owner = THIS_MODULE, \ 273 .release = __lock_##name##_release, \ 274 .bind = __lock_##name##_bind, \ 275 .connect = __lock_##name##_connect, \ 276 .socketpair = __lock_##name##_socketpair, \ 277 .accept = __lock_##name##_accept, \ 278 .getname = __lock_##name##_getname, \ 279 .poll = __lock_##name##_poll, \ 280 .ioctl = __lock_##name##_ioctl, \ 281 .compat_ioctl = __lock_##name##_compat_ioctl, \ 282 .listen = __lock_##name##_listen, \ 283 .shutdown = __lock_##name##_shutdown, \ 284 .setsockopt = __lock_##name##_setsockopt, \ 285 .getsockopt = __lock_##name##_getsockopt, \ 286 .sendmsg = __lock_##name##_sendmsg, \ 287 .recvmsg = __lock_##name##_recvmsg, \ 288 .mmap = __lock_##name##_mmap, \ 289 }; 290 291 #endif 292 293 #define MODULE_ALIAS_NETPROTO(proto) \ 294 MODULE_ALIAS("net-pf-" __stringify(proto)) 295 296 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 297 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 298 299 #ifdef CONFIG_SYSCTL 300 #include <linux/sysctl.h> 301 extern ctl_table net_table[]; 302 extern int net_msg_cost; 303 extern int net_msg_burst; 304 #endif 305 306 #endif /* __KERNEL__ */ 307 #endif /* _LINUX_NET_H */ 308