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