1 #ifndef _LINUX_SOCKET_H 2 #define _LINUX_SOCKET_H 3 4 5 #include <asm/socket.h> /* arch-dependent defines */ 6 #include <linux/sockios.h> /* the SIOCxxx I/O controls */ 7 #include <linux/uio.h> /* iovec support */ 8 #include <linux/types.h> /* pid_t */ 9 #include <linux/compiler.h> /* __user */ 10 #include <uapi/linux/socket.h> 11 12 struct pid; 13 struct cred; 14 15 #define __sockaddr_check_size(size) \ 16 BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage))) 17 18 #ifdef CONFIG_PROC_FS 19 struct seq_file; 20 extern void socket_seq_show(struct seq_file *seq); 21 #endif 22 23 typedef __kernel_sa_family_t sa_family_t; 24 25 /* 26 * 1003.1g requires sa_family_t and that sa_data is char. 27 */ 28 29 struct sockaddr { 30 sa_family_t sa_family; /* address family, AF_xxx */ 31 char sa_data[14]; /* 14 bytes of protocol address */ 32 }; 33 34 struct linger { 35 int l_onoff; /* Linger active */ 36 int l_linger; /* How long to linger for */ 37 }; 38 39 #define sockaddr_storage __kernel_sockaddr_storage 40 41 /* 42 * As we do 4.4BSD message passing we use a 4.4BSD message passing 43 * system, not 4.3. Thus msg_accrights(len) are now missing. They 44 * belong in an obscure libc emulation or the bin. 45 */ 46 47 struct msghdr { 48 void *msg_name; /* ptr to socket address structure */ 49 int msg_namelen; /* size of socket address structure */ 50 struct iov_iter msg_iter; /* data */ 51 void *msg_control; /* ancillary data */ 52 __kernel_size_t msg_controllen; /* ancillary data buffer length */ 53 unsigned int msg_flags; /* flags on received message */ 54 }; 55 56 struct user_msghdr { 57 void __user *msg_name; /* ptr to socket address structure */ 58 int msg_namelen; /* size of socket address structure */ 59 struct iovec __user *msg_iov; /* scatter/gather array */ 60 __kernel_size_t msg_iovlen; /* # elements in msg_iov */ 61 void __user *msg_control; /* ancillary data */ 62 __kernel_size_t msg_controllen; /* ancillary data buffer length */ 63 unsigned int msg_flags; /* flags on received message */ 64 }; 65 66 /* For recvmmsg/sendmmsg */ 67 struct mmsghdr { 68 struct user_msghdr msg_hdr; 69 unsigned int msg_len; 70 }; 71 72 /* 73 * POSIX 1003.1g - ancillary data object information 74 * Ancillary data consits of a sequence of pairs of 75 * (cmsghdr, cmsg_data[]) 76 */ 77 78 struct cmsghdr { 79 __kernel_size_t cmsg_len; /* data byte count, including hdr */ 80 int cmsg_level; /* originating protocol */ 81 int cmsg_type; /* protocol-specific type */ 82 }; 83 84 /* 85 * Ancillary data object information MACROS 86 * Table 5-14 of POSIX 1003.1g 87 */ 88 89 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg)) 90 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg)) 91 92 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) ) 93 94 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr)))) 95 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len)) 96 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len)) 97 98 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \ 99 (struct cmsghdr *)(ctl) : \ 100 (struct cmsghdr *)NULL) 101 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen) 102 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \ 103 (cmsg)->cmsg_len <= (unsigned long) \ 104 ((mhdr)->msg_controllen - \ 105 ((char *)(cmsg) - (char *)(mhdr)->msg_control))) 106 #define for_each_cmsghdr(cmsg, msg) \ 107 for (cmsg = CMSG_FIRSTHDR(msg); \ 108 cmsg; \ 109 cmsg = CMSG_NXTHDR(msg, cmsg)) 110 111 /* 112 * Get the next cmsg header 113 * 114 * PLEASE, do not touch this function. If you think, that it is 115 * incorrect, grep kernel sources and think about consequences 116 * before trying to improve it. 117 * 118 * Now it always returns valid, not truncated ancillary object 119 * HEADER. But caller still MUST check, that cmsg->cmsg_len is 120 * inside range, given by msg->msg_controllen before using 121 * ancillary object DATA. --ANK (980731) 122 */ 123 124 static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size, 125 struct cmsghdr *__cmsg) 126 { 127 struct cmsghdr * __ptr; 128 129 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len)); 130 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size) 131 return (struct cmsghdr *)0; 132 133 return __ptr; 134 } 135 136 static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg) 137 { 138 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg); 139 } 140 141 /* "Socket"-level control message types: */ 142 143 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */ 144 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */ 145 #define SCM_SECURITY 0x03 /* rw: security label */ 146 147 struct ucred { 148 __u32 pid; 149 __u32 uid; 150 __u32 gid; 151 }; 152 153 /* Supported address families. */ 154 #define AF_UNSPEC 0 155 #define AF_UNIX 1 /* Unix domain sockets */ 156 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */ 157 #define AF_INET 2 /* Internet IP Protocol */ 158 #define AF_AX25 3 /* Amateur Radio AX.25 */ 159 #define AF_IPX 4 /* Novell IPX */ 160 #define AF_APPLETALK 5 /* AppleTalk DDP */ 161 #define AF_NETROM 6 /* Amateur Radio NET/ROM */ 162 #define AF_BRIDGE 7 /* Multiprotocol bridge */ 163 #define AF_ATMPVC 8 /* ATM PVCs */ 164 #define AF_X25 9 /* Reserved for X.25 project */ 165 #define AF_INET6 10 /* IP version 6 */ 166 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */ 167 #define AF_DECnet 12 /* Reserved for DECnet project */ 168 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/ 169 #define AF_SECURITY 14 /* Security callback pseudo AF */ 170 #define AF_KEY 15 /* PF_KEY key management API */ 171 #define AF_NETLINK 16 172 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */ 173 #define AF_PACKET 17 /* Packet family */ 174 #define AF_ASH 18 /* Ash */ 175 #define AF_ECONET 19 /* Acorn Econet */ 176 #define AF_ATMSVC 20 /* ATM SVCs */ 177 #define AF_RDS 21 /* RDS sockets */ 178 #define AF_SNA 22 /* Linux SNA Project (nutters!) */ 179 #define AF_IRDA 23 /* IRDA sockets */ 180 #define AF_PPPOX 24 /* PPPoX sockets */ 181 #define AF_WANPIPE 25 /* Wanpipe API Sockets */ 182 #define AF_LLC 26 /* Linux LLC */ 183 #define AF_IB 27 /* Native InfiniBand address */ 184 #define AF_CAN 29 /* Controller Area Network */ 185 #define AF_TIPC 30 /* TIPC sockets */ 186 #define AF_BLUETOOTH 31 /* Bluetooth sockets */ 187 #define AF_IUCV 32 /* IUCV sockets */ 188 #define AF_RXRPC 33 /* RxRPC sockets */ 189 #define AF_ISDN 34 /* mISDN sockets */ 190 #define AF_PHONET 35 /* Phonet sockets */ 191 #define AF_IEEE802154 36 /* IEEE802154 sockets */ 192 #define AF_CAIF 37 /* CAIF sockets */ 193 #define AF_ALG 38 /* Algorithm sockets */ 194 #define AF_NFC 39 /* NFC sockets */ 195 #define AF_VSOCK 40 /* vSockets */ 196 #define AF_MAX 41 /* For now.. */ 197 198 /* Protocol families, same as address families. */ 199 #define PF_UNSPEC AF_UNSPEC 200 #define PF_UNIX AF_UNIX 201 #define PF_LOCAL AF_LOCAL 202 #define PF_INET AF_INET 203 #define PF_AX25 AF_AX25 204 #define PF_IPX AF_IPX 205 #define PF_APPLETALK AF_APPLETALK 206 #define PF_NETROM AF_NETROM 207 #define PF_BRIDGE AF_BRIDGE 208 #define PF_ATMPVC AF_ATMPVC 209 #define PF_X25 AF_X25 210 #define PF_INET6 AF_INET6 211 #define PF_ROSE AF_ROSE 212 #define PF_DECnet AF_DECnet 213 #define PF_NETBEUI AF_NETBEUI 214 #define PF_SECURITY AF_SECURITY 215 #define PF_KEY AF_KEY 216 #define PF_NETLINK AF_NETLINK 217 #define PF_ROUTE AF_ROUTE 218 #define PF_PACKET AF_PACKET 219 #define PF_ASH AF_ASH 220 #define PF_ECONET AF_ECONET 221 #define PF_ATMSVC AF_ATMSVC 222 #define PF_RDS AF_RDS 223 #define PF_SNA AF_SNA 224 #define PF_IRDA AF_IRDA 225 #define PF_PPPOX AF_PPPOX 226 #define PF_WANPIPE AF_WANPIPE 227 #define PF_LLC AF_LLC 228 #define PF_IB AF_IB 229 #define PF_CAN AF_CAN 230 #define PF_TIPC AF_TIPC 231 #define PF_BLUETOOTH AF_BLUETOOTH 232 #define PF_IUCV AF_IUCV 233 #define PF_RXRPC AF_RXRPC 234 #define PF_ISDN AF_ISDN 235 #define PF_PHONET AF_PHONET 236 #define PF_IEEE802154 AF_IEEE802154 237 #define PF_CAIF AF_CAIF 238 #define PF_ALG AF_ALG 239 #define PF_NFC AF_NFC 240 #define PF_VSOCK AF_VSOCK 241 #define PF_MAX AF_MAX 242 243 /* Maximum queue length specifiable by listen. */ 244 #define SOMAXCONN 128 245 246 /* Flags we can use with send/ and recv. 247 Added those for 1003.1g not all are supported yet 248 */ 249 250 #define MSG_OOB 1 251 #define MSG_PEEK 2 252 #define MSG_DONTROUTE 4 253 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */ 254 #define MSG_CTRUNC 8 255 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */ 256 #define MSG_TRUNC 0x20 257 #define MSG_DONTWAIT 0x40 /* Nonblocking io */ 258 #define MSG_EOR 0x80 /* End of record */ 259 #define MSG_WAITALL 0x100 /* Wait for a full request */ 260 #define MSG_FIN 0x200 261 #define MSG_SYN 0x400 262 #define MSG_CONFIRM 0x800 /* Confirm path validity */ 263 #define MSG_RST 0x1000 264 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */ 265 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */ 266 #define MSG_MORE 0x8000 /* Sender will send more */ 267 #define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */ 268 #define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */ 269 #define MSG_EOF MSG_FIN 270 271 #define MSG_FASTOPEN 0x20000000 /* Send data in TCP SYN */ 272 #define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exec for file 273 descriptor received through 274 SCM_RIGHTS */ 275 #if defined(CONFIG_COMPAT) 276 #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */ 277 #else 278 #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */ 279 #endif 280 281 282 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */ 283 #define SOL_IP 0 284 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */ 285 #define SOL_TCP 6 286 #define SOL_UDP 17 287 #define SOL_IPV6 41 288 #define SOL_ICMPV6 58 289 #define SOL_SCTP 132 290 #define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */ 291 #define SOL_RAW 255 292 #define SOL_IPX 256 293 #define SOL_AX25 257 294 #define SOL_ATALK 258 295 #define SOL_NETROM 259 296 #define SOL_ROSE 260 297 #define SOL_DECNET 261 298 #define SOL_X25 262 299 #define SOL_PACKET 263 300 #define SOL_ATM 264 /* ATM layer (cell level) */ 301 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */ 302 #define SOL_IRDA 266 303 #define SOL_NETBEUI 267 304 #define SOL_LLC 268 305 #define SOL_DCCP 269 306 #define SOL_NETLINK 270 307 #define SOL_TIPC 271 308 #define SOL_RXRPC 272 309 #define SOL_PPPOL2TP 273 310 #define SOL_BLUETOOTH 274 311 #define SOL_PNPIPE 275 312 #define SOL_RDS 276 313 #define SOL_IUCV 277 314 #define SOL_CAIF 278 315 #define SOL_ALG 279 316 #define SOL_NFC 280 317 318 /* IPX options */ 319 #define IPX_TYPE 1 320 321 extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr); 322 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data); 323 324 struct timespec; 325 326 /* The __sys_...msg variants allow MSG_CMSG_COMPAT */ 327 extern long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags); 328 extern long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags); 329 extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, 330 unsigned int flags, struct timespec *timeout); 331 extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, 332 unsigned int vlen, unsigned int flags); 333 #endif /* _LINUX_SOCKET_H */ 334