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/socket.h> 22 #include <asm/socket.h> 23 24 #define NPROTO AF_MAX 25 26 #define SYS_SOCKET 1 /* sys_socket(2) */ 27 #define SYS_BIND 2 /* sys_bind(2) */ 28 #define SYS_CONNECT 3 /* sys_connect(2) */ 29 #define SYS_LISTEN 4 /* sys_listen(2) */ 30 #define SYS_ACCEPT 5 /* sys_accept(2) */ 31 #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ 32 #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ 33 #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ 34 #define SYS_SEND 9 /* sys_send(2) */ 35 #define SYS_RECV 10 /* sys_recv(2) */ 36 #define SYS_SENDTO 11 /* sys_sendto(2) */ 37 #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ 38 #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ 39 #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ 40 #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ 41 #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ 42 #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ 43 #define SYS_ACCEPT4 18 /* sys_accept4(2) */ 44 #define SYS_RECVMMSG 19 /* sys_recvmmsg(2) */ 45 46 typedef enum { 47 SS_FREE = 0, /* not allocated */ 48 SS_UNCONNECTED, /* unconnected to any socket */ 49 SS_CONNECTING, /* in process of connecting */ 50 SS_CONNECTED, /* connected to socket */ 51 SS_DISCONNECTING /* in process of disconnecting */ 52 } socket_state; 53 54 #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ 55 56 #ifdef __KERNEL__ 57 #include <linux/stringify.h> 58 #include <linux/random.h> 59 #include <linux/wait.h> 60 #include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */ 61 #include <linux/kmemcheck.h> 62 63 struct poll_table_struct; 64 struct pipe_inode_info; 65 struct inode; 66 struct net; 67 68 #define SOCK_ASYNC_NOSPACE 0 69 #define SOCK_ASYNC_WAITDATA 1 70 #define SOCK_NOSPACE 2 71 #define SOCK_PASSCRED 3 72 #define SOCK_PASSSEC 4 73 74 #ifndef ARCH_HAS_SOCKET_TYPES 75 /** 76 * enum sock_type - Socket types 77 * @SOCK_STREAM: stream (connection) socket 78 * @SOCK_DGRAM: datagram (conn.less) socket 79 * @SOCK_RAW: raw socket 80 * @SOCK_RDM: reliably-delivered message 81 * @SOCK_SEQPACKET: sequential packet socket 82 * @SOCK_DCCP: Datagram Congestion Control Protocol socket 83 * @SOCK_PACKET: linux specific way of getting packets at the dev level. 84 * For writing rarp and other similar things on the user level. 85 * 86 * When adding some new socket type please 87 * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS 88 * overrides this enum for binary compat reasons. 89 */ 90 enum sock_type { 91 SOCK_STREAM = 1, 92 SOCK_DGRAM = 2, 93 SOCK_RAW = 3, 94 SOCK_RDM = 4, 95 SOCK_SEQPACKET = 5, 96 SOCK_DCCP = 6, 97 SOCK_PACKET = 10, 98 }; 99 100 #define SOCK_MAX (SOCK_PACKET + 1) 101 /* Mask which covers at least up to SOCK_MASK-1. The 102 * remaining bits are used as flags. */ 103 #define SOCK_TYPE_MASK 0xf 104 105 /* Flags for socket, socketpair, accept4 */ 106 #define SOCK_CLOEXEC O_CLOEXEC 107 #ifndef SOCK_NONBLOCK 108 #define SOCK_NONBLOCK O_NONBLOCK 109 #endif 110 111 #endif /* ARCH_HAS_SOCKET_TYPES */ 112 113 enum sock_shutdown_cmd { 114 SHUT_RD = 0, 115 SHUT_WR = 1, 116 SHUT_RDWR = 2, 117 }; 118 119 /** 120 * struct socket - general BSD socket 121 * @state: socket state (%SS_CONNECTED, etc) 122 * @type: socket type (%SOCK_STREAM, etc) 123 * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) 124 * @ops: protocol specific socket operations 125 * @fasync_list: Asynchronous wake up list 126 * @file: File back pointer for gc 127 * @sk: internal networking protocol agnostic socket representation 128 * @wait: wait queue for several uses 129 */ 130 struct socket { 131 socket_state state; 132 133 kmemcheck_bitfield_begin(type); 134 short type; 135 kmemcheck_bitfield_end(type); 136 137 unsigned long flags; 138 /* 139 * Please keep fasync_list & wait fields in the same cache line 140 */ 141 struct fasync_struct *fasync_list; 142 wait_queue_head_t wait; 143 144 struct file *file; 145 struct sock *sk; 146 const struct proto_ops *ops; 147 }; 148 149 struct vm_area_struct; 150 struct page; 151 struct kiocb; 152 struct sockaddr; 153 struct msghdr; 154 struct module; 155 156 struct proto_ops { 157 int family; 158 struct module *owner; 159 int (*release) (struct socket *sock); 160 int (*bind) (struct socket *sock, 161 struct sockaddr *myaddr, 162 int sockaddr_len); 163 int (*connect) (struct socket *sock, 164 struct sockaddr *vaddr, 165 int sockaddr_len, int flags); 166 int (*socketpair)(struct socket *sock1, 167 struct socket *sock2); 168 int (*accept) (struct socket *sock, 169 struct socket *newsock, int flags); 170 int (*getname) (struct socket *sock, 171 struct sockaddr *addr, 172 int *sockaddr_len, int peer); 173 unsigned int (*poll) (struct file *file, struct socket *sock, 174 struct poll_table_struct *wait); 175 int (*ioctl) (struct socket *sock, unsigned int cmd, 176 unsigned long arg); 177 int (*compat_ioctl) (struct socket *sock, unsigned int cmd, 178 unsigned long arg); 179 int (*listen) (struct socket *sock, int len); 180 int (*shutdown) (struct socket *sock, int flags); 181 int (*setsockopt)(struct socket *sock, int level, 182 int optname, char __user *optval, unsigned int optlen); 183 int (*getsockopt)(struct socket *sock, int level, 184 int optname, char __user *optval, int __user *optlen); 185 int (*compat_setsockopt)(struct socket *sock, int level, 186 int optname, char __user *optval, unsigned int optlen); 187 int (*compat_getsockopt)(struct socket *sock, int level, 188 int optname, char __user *optval, int __user *optlen); 189 int (*sendmsg) (struct kiocb *iocb, struct socket *sock, 190 struct msghdr *m, size_t total_len); 191 int (*recvmsg) (struct kiocb *iocb, struct socket *sock, 192 struct msghdr *m, size_t total_len, 193 int flags); 194 int (*mmap) (struct file *file, struct socket *sock, 195 struct vm_area_struct * vma); 196 ssize_t (*sendpage) (struct socket *sock, struct page *page, 197 int offset, size_t size, int flags); 198 ssize_t (*splice_read)(struct socket *sock, loff_t *ppos, 199 struct pipe_inode_info *pipe, size_t len, unsigned int flags); 200 }; 201 202 #define DECLARE_SOCKADDR(type, dst, src) \ 203 type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; }) 204 205 struct net_proto_family { 206 int family; 207 int (*create)(struct net *net, struct socket *sock, 208 int protocol, int kern); 209 struct module *owner; 210 }; 211 212 struct iovec; 213 struct kvec; 214 215 enum { 216 SOCK_WAKE_IO, 217 SOCK_WAKE_WAITD, 218 SOCK_WAKE_SPACE, 219 SOCK_WAKE_URG, 220 }; 221 222 extern int sock_wake_async(struct socket *sk, int how, int band); 223 extern int sock_register(const struct net_proto_family *fam); 224 extern void sock_unregister(int family); 225 extern int sock_create(int family, int type, int proto, 226 struct socket **res); 227 extern int sock_create_kern(int family, int type, int proto, 228 struct socket **res); 229 extern int sock_create_lite(int family, int type, int proto, 230 struct socket **res); 231 extern void sock_release(struct socket *sock); 232 extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, 233 size_t len); 234 extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, 235 size_t size, int flags); 236 extern int sock_map_fd(struct socket *sock, int flags); 237 extern struct socket *sockfd_lookup(int fd, int *err); 238 #define sockfd_put(sock) fput(sock->file) 239 extern int net_ratelimit(void); 240 241 #define net_random() random32() 242 #define net_srandom(seed) srandom32((__force u32)seed) 243 244 extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, 245 struct kvec *vec, size_t num, size_t len); 246 extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, 247 struct kvec *vec, size_t num, 248 size_t len, int flags); 249 250 extern int kernel_bind(struct socket *sock, struct sockaddr *addr, 251 int addrlen); 252 extern int kernel_listen(struct socket *sock, int backlog); 253 extern int kernel_accept(struct socket *sock, struct socket **newsock, 254 int flags); 255 extern int kernel_connect(struct socket *sock, struct sockaddr *addr, 256 int addrlen, int flags); 257 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr, 258 int *addrlen); 259 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr, 260 int *addrlen); 261 extern int kernel_getsockopt(struct socket *sock, int level, int optname, 262 char *optval, int *optlen); 263 extern int kernel_setsockopt(struct socket *sock, int level, int optname, 264 char *optval, unsigned int optlen); 265 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset, 266 size_t size, int flags); 267 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg); 268 extern int kernel_sock_shutdown(struct socket *sock, 269 enum sock_shutdown_cmd how); 270 271 #define MODULE_ALIAS_NETPROTO(proto) \ 272 MODULE_ALIAS("net-pf-" __stringify(proto)) 273 274 #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ 275 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) 276 277 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \ 278 MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \ 279 "-type-" __stringify(type)) 280 281 #ifdef CONFIG_SYSCTL 282 #include <linux/sysctl.h> 283 #include <linux/ratelimit.h> 284 extern struct ratelimit_state net_ratelimit_state; 285 #endif 286 287 #endif /* __KERNEL__ */ 288 #endif /* _LINUX_NET_H */ 289